/*

  * ffplay : Simple Media Player based on the FFmpeg libraries

  * Copyright (c) 2003 Fabrice Bellard
  *

  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or

  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either

  * version 2.1 of the License, or (at your option) any later version.

  *

  * FFmpeg is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public

  * License along with FFmpeg; if not, write to the Free Software

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  */

 #include "config.h"

 #include <inttypes.h>

 #include <math.h>
 #include <limits.h>

 #include "libavutil/avstring.h"

 #include "libavutil/colorspace.h"

 #include "libavutil/pixdesc.h"

 #include "libavutil/imgutils.h"

 #include "libavutil/dict.h"

 #include "libavutil/parseutils.h"
 #include "libavutil/samplefmt.h"

 #include "libavutil/avassert.h"

 #include "libavformat/avformat.h"
 #include "libavdevice/avdevice.h"
 #include "libswscale/swscale.h"

 #include "libavcodec/audioconvert.h"

 #include "libavcodec/opt.h"

 #include "libavcodec/avfft.h"

 #if CONFIG_AVFILTER

 # include "libavfilter/avcodec.h"

 # include "libavfilter/avfilter.h"
 # include "libavfilter/avfiltergraph.h"

 # include "libavfilter/vsink_buffer.h"

 #endif
 

 #include <SDL.h>
 #include <SDL_thread.h>
 

 #include "cmdutils.h"

 #include <unistd.h>
 #include <assert.h>
 

 const char program_name[] = "ffplay";

 const int program_birth_year = 2003;

 #define MAX_QUEUE_SIZE (15 * 1024 * 1024)
 #define MIN_AUDIOQ_SIZE (20 * 16 * 1024)
 #define MIN_FRAMES 5

 /* SDL audio buffer size, in samples. Should be small to have precise
    A/V sync as SDL does not have hardware buffer fullness info. */
 #define SDL_AUDIO_BUFFER_SIZE 1024
 
 /* no AV sync correction is done if below the AV sync threshold */

 #define AV_SYNC_THRESHOLD 0.01

 /* no AV correction is done if too big error */
 #define AV_NOSYNC_THRESHOLD 10.0
 

 #define FRAME_SKIP_FACTOR 0.05
 

 /* maximum audio speed change to get correct sync */
 #define SAMPLE_CORRECTION_PERCENT_MAX 10
 
 /* we use about AUDIO_DIFF_AVG_NB A-V differences to make the average */
 #define AUDIO_DIFF_AVG_NB   20
 

 /* NOTE: the size must be big enough to compensate the hardware audio buffersize size */
 #define SAMPLE_ARRAY_SIZE (2*65536)
 

 static int sws_flags = SWS_BICUBIC;
 

 typedef struct PacketQueue {
     AVPacketList *first_pkt, *last_pkt;
     int nb_packets;
     int size;
     int abort_request;
     SDL_mutex *mutex;
     SDL_cond *cond;
 } PacketQueue;
 

 #define VIDEO_PICTURE_QUEUE_SIZE 2

 #define SUBPICTURE_QUEUE_SIZE 4

 
 typedef struct VideoPicture {

     double pts;                                  ///<presentation time stamp for this picture

     double target_clock;                         ///<av_gettime() time at which this should be displayed ideally

     int64_t pos;                                 ///<byte position in file

     SDL_Overlay *bmp;
     int width, height; /* source height & width */
     int allocated;

     enum PixelFormat pix_fmt;
 
 #if CONFIG_AVFILTER

     AVFilterBufferRef *picref;

 #endif

 } VideoPicture;
 

 typedef struct SubPicture {
     double pts; /* presentation time stamp for this picture */
     AVSubtitle sub;
 } SubPicture;
 

 enum {
     AV_SYNC_AUDIO_MASTER, /* default choice */
     AV_SYNC_VIDEO_MASTER,

     AV_SYNC_EXTERNAL_CLOCK, /* synchronize to an external clock */

 };
 
 typedef struct VideoState {

     SDL_Thread *read_tid;

     SDL_Thread *video_tid;

     SDL_Thread *refresh_tid;

     AVInputFormat *iformat;

     int no_background;
     int abort_request;
     int paused;

     int last_paused;

     int seek_req;

     int seek_flags;

     int64_t seek_pos;

     int64_t seek_rel;

     int read_pause_return;

     AVFormatContext *ic;
 
     int audio_stream;

     int av_sync_type;

     double external_clock; /* external clock base */
     int64_t external_clock_time;

     double audio_clock;
     double audio_diff_cum; /* used for AV difference average computation */
     double audio_diff_avg_coef;
     double audio_diff_threshold;
     int audio_diff_avg_count;

     AVStream *audio_st;
     PacketQueue audioq;
     int audio_hw_buf_size;
     /* samples output by the codec. we reserve more space for avsync
        compensation */

     DECLARE_ALIGNED(16,uint8_t,audio_buf1)[(AVCODEC_MAX_AUDIO_FRAME_SIZE * 3) / 2];
     DECLARE_ALIGNED(16,uint8_t,audio_buf2)[(AVCODEC_MAX_AUDIO_FRAME_SIZE * 3) / 2];

     uint8_t *audio_buf;

     unsigned int audio_buf_size; /* in bytes */

     int audio_buf_index; /* in bytes */

     AVPacket audio_pkt_temp;

     AVPacket audio_pkt;

     enum AVSampleFormat audio_src_fmt;

     AVAudioConvert *reformat_ctx;

     enum ShowMode {

         SHOW_MODE_NONE = -1, SHOW_MODE_VIDEO = 0, SHOW_MODE_WAVES, SHOW_MODE_RDFT, SHOW_MODE_NB

     } show_mode;

     int16_t sample_array[SAMPLE_ARRAY_SIZE];
     int sample_array_index;

     int last_i_start;

     RDFTContext *rdft;

     int rdft_bits;

     FFTSample *rdft_data;

     int xpos;

     SDL_Thread *subtitle_tid;
     int subtitle_stream;
     int subtitle_stream_changed;
     AVStream *subtitle_st;
     PacketQueue subtitleq;
     SubPicture subpq[SUBPICTURE_QUEUE_SIZE];
     int subpq_size, subpq_rindex, subpq_windex;
     SDL_mutex *subpq_mutex;
     SDL_cond *subpq_cond;

     double frame_timer;
     double frame_last_pts;
     double frame_last_delay;

     double video_clock;                          ///<pts of last decoded frame / predicted pts of next decoded frame

     int video_stream;
     AVStream *video_st;
     PacketQueue videoq;

     double video_current_pts;                    ///<current displayed pts (different from video_clock if frame fifos are used)

     double video_current_pts_drift;              ///<video_current_pts - time (av_gettime) at which we updated video_current_pts - used to have running video pts

     int64_t video_current_pos;                   ///<current displayed file pos

     VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
     int pictq_size, pictq_rindex, pictq_windex;
     SDL_mutex *pictq_mutex;
     SDL_cond *pictq_cond;

 #if !CONFIG_AVFILTER

     struct SwsContext *img_convert_ctx;

 #endif

     char filename[1024];
     int width, height, xleft, ytop;

 #if CONFIG_AVFILTER
     AVFilterContext *out_video_filter;          ///<the last filter in the video chain
 #endif

 
     float skip_frames;
     float skip_frames_index;
     int refresh;

 } VideoState;
 

 static int opt_help(const char *opt, const char *arg);

 
 /* options specified by the user */
 static AVInputFormat *file_iformat;
 static const char *input_filename;

 static const char *window_title;

 static int fs_screen_width;
 static int fs_screen_height;

 static int screen_width = 0;
 static int screen_height = 0;

 static int frame_width = 0;
 static int frame_height = 0;
 static enum PixelFormat frame_pix_fmt = PIX_FMT_NONE;

 static int audio_disable;
 static int video_disable;

 static int wanted_stream[AVMEDIA_TYPE_NB]={
     [AVMEDIA_TYPE_AUDIO]=-1,
     [AVMEDIA_TYPE_VIDEO]=-1,
     [AVMEDIA_TYPE_SUBTITLE]=-1,

 };

 static int seek_by_bytes=-1;

 static int display_disable;

 static int show_status = 1;

 static int av_sync_type = AV_SYNC_AUDIO_MASTER;

 static int64_t start_time = AV_NOPTS_VALUE;

 static int64_t duration = AV_NOPTS_VALUE;

 static int step = 0;

 static int thread_count = 1;

 static int workaround_bugs = 1;

 static int fast = 0;

 static int genpts = 0;

 static int lowres = 0;
 static int idct = FF_IDCT_AUTO;

 static enum AVDiscard skip_frame= AVDISCARD_DEFAULT;
 static enum AVDiscard skip_idct= AVDISCARD_DEFAULT;
 static enum AVDiscard skip_loop_filter= AVDISCARD_DEFAULT;

 static int error_recognition = FF_ER_CAREFUL;

 static int error_concealment = 3;

 static int decoder_reorder_pts= -1;

 static int autoexit;

 static int exit_on_keydown;
 static int exit_on_mousedown;

 static int loop=1;

 static int framedrop=-1;

 static enum ShowMode show_mode = SHOW_MODE_NONE;

 
 static int rdftspeed=20;

 #if CONFIG_AVFILTER
 static char *vfilters = NULL;
 #endif

 
 /* current context */
 static int is_full_screen;
 static VideoState *cur_stream;

 static int64_t audio_callback_time;

 static AVPacket flush_pkt;

 #define FF_ALLOC_EVENT   (SDL_USEREVENT)
 #define FF_REFRESH_EVENT (SDL_USEREVENT + 1)

 #define FF_QUIT_EVENT    (SDL_USEREVENT + 2)

 static SDL_Surface *screen;

 static int packet_queue_put(PacketQueue *q, AVPacket *pkt)
 {
     AVPacketList *pkt1;
 
     /* duplicate the packet */
     if (pkt!=&flush_pkt && av_dup_packet(pkt) < 0)
         return -1;
 
     pkt1 = av_malloc(sizeof(AVPacketList));
     if (!pkt1)
         return -1;
     pkt1->pkt = *pkt;
     pkt1->next = NULL;
 
 
     SDL_LockMutex(q->mutex);
 
     if (!q->last_pkt)
 
         q->first_pkt = pkt1;
     else
         q->last_pkt->next = pkt1;
     q->last_pkt = pkt1;
     q->nb_packets++;
     q->size += pkt1->pkt.size + sizeof(*pkt1);
     /* XXX: should duplicate packet data in DV case */
     SDL_CondSignal(q->cond);
 
     SDL_UnlockMutex(q->mutex);
     return 0;
 }

 /* packet queue handling */
 static void packet_queue_init(PacketQueue *q)
 {
     memset(q, 0, sizeof(PacketQueue));
     q->mutex = SDL_CreateMutex();
     q->cond = SDL_CreateCond();

     packet_queue_put(q, &flush_pkt);

 }
 

 static void packet_queue_flush(PacketQueue *q)

 {
     AVPacketList *pkt, *pkt1;
 

     SDL_LockMutex(q->mutex);

     for(pkt = q->first_pkt; pkt != NULL; pkt = pkt1) {
         pkt1 = pkt->next;
         av_free_packet(&pkt->pkt);

         av_freep(&pkt);

     }

     q->last_pkt = NULL;
     q->first_pkt = NULL;
     q->nb_packets = 0;
     q->size = 0;

     SDL_UnlockMutex(q->mutex);

 }
 
 static void packet_queue_end(PacketQueue *q)
 {
     packet_queue_flush(q);

     SDL_DestroyMutex(q->mutex);
     SDL_DestroyCond(q->cond);
 }
 
 static void packet_queue_abort(PacketQueue *q)
 {
     SDL_LockMutex(q->mutex);
 
     q->abort_request = 1;

     SDL_CondSignal(q->cond);
 
     SDL_UnlockMutex(q->mutex);
 }
 
 /* return < 0 if aborted, 0 if no packet and > 0 if packet.  */
 static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block)
 {
     AVPacketList *pkt1;
     int ret;
 
     SDL_LockMutex(q->mutex);
 
     for(;;) {
         if (q->abort_request) {
             ret = -1;
             break;
         }

         pkt1 = q->first_pkt;
         if (pkt1) {
             q->first_pkt = pkt1->next;
             if (!q->first_pkt)
                 q->last_pkt = NULL;
             q->nb_packets--;

             q->size -= pkt1->pkt.size + sizeof(*pkt1);

             *pkt = pkt1->pkt;
             av_free(pkt1);
             ret = 1;
             break;
         } else if (!block) {
             ret = 0;
             break;
         } else {
             SDL_CondWait(q->cond, q->mutex);
         }
     }
     SDL_UnlockMutex(q->mutex);
     return ret;
 }
 

 static inline void fill_rectangle(SDL_Surface *screen,

                                   int x, int y, int w, int h, int color)
 {
     SDL_Rect rect;
     rect.x = x;
     rect.y = y;
     rect.w = w;
     rect.h = h;
     SDL_FillRect(screen, &rect, color);
 }
 

 #define ALPHA_BLEND(a, oldp, newp, s)\
 ((((oldp << s) * (255 - (a))) + (newp * (a))) / (255 << s))
 
 #define RGBA_IN(r, g, b, a, s)\
 {\
     unsigned int v = ((const uint32_t *)(s))[0];\
     a = (v >> 24) & 0xff;\
     r = (v >> 16) & 0xff;\
     g = (v >> 8) & 0xff;\
     b = v & 0xff;\
 }
 
 #define YUVA_IN(y, u, v, a, s, pal)\
 {\

     unsigned int val = ((const uint32_t *)(pal))[*(const uint8_t*)(s)];\

     a = (val >> 24) & 0xff;\
     y = (val >> 16) & 0xff;\
     u = (val >> 8) & 0xff;\
     v = val & 0xff;\
 }
 
 #define YUVA_OUT(d, y, u, v, a)\
 {\
     ((uint32_t *)(d))[0] = (a << 24) | (y << 16) | (u << 8) | v;\
 }
 
 
 #define BPP 1
 

 static void blend_subrect(AVPicture *dst, const AVSubtitleRect *rect, int imgw, int imgh)

 {
     int wrap, wrap3, width2, skip2;
     int y, u, v, a, u1, v1, a1, w, h;
     uint8_t *lum, *cb, *cr;
     const uint8_t *p;
     const uint32_t *pal;

     int dstx, dsty, dstw, dsth;
 

     dstw = av_clip(rect->w, 0, imgw);
     dsth = av_clip(rect->h, 0, imgh);
     dstx = av_clip(rect->x, 0, imgw - dstw);
     dsty = av_clip(rect->y, 0, imgh - dsth);

     lum = dst->data[0] + dsty * dst->linesize[0];
     cb = dst->data[1] + (dsty >> 1) * dst->linesize[1];
     cr = dst->data[2] + (dsty >> 1) * dst->linesize[2];
 

     width2 = ((dstw + 1) >> 1) + (dstx & ~dstw & 1);

     skip2 = dstx >> 1;

     wrap = dst->linesize[0];

     wrap3 = rect->pict.linesize[0];
     p = rect->pict.data[0];
     pal = (const uint32_t *)rect->pict.data[1];  /* Now in YCrCb! */

     if (dsty & 1) {
         lum += dstx;

         cb += skip2;
         cr += skip2;

         if (dstx & 1) {

             YUVA_IN(y, u, v, a, p, pal);
             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
             cb++;
             cr++;
             lum++;
             p += BPP;
         }

         for(w = dstw - (dstx & 1); w >= 2; w -= 2) {

             YUVA_IN(y, u, v, a, p, pal);
             u1 = u;
             v1 = v;
             a1 = a;
             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 
             YUVA_IN(y, u, v, a, p + BPP, pal);
             u1 += u;
             v1 += v;
             a1 += a;
             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
             cb++;
             cr++;
             p += 2 * BPP;
             lum += 2;
         }
         if (w) {
             YUVA_IN(y, u, v, a, p, pal);
             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);

             p++;
             lum++;

         }

         p += wrap3 - dstw * BPP;
         lum += wrap - dstw - dstx;

         cb += dst->linesize[1] - width2 - skip2;
         cr += dst->linesize[2] - width2 - skip2;
     }

     for(h = dsth - (dsty & 1); h >= 2; h -= 2) {
         lum += dstx;

         cb += skip2;
         cr += skip2;

         if (dstx & 1) {

             YUVA_IN(y, u, v, a, p, pal);
             u1 = u;
             v1 = v;
             a1 = a;
             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
             p += wrap3;
             lum += wrap;
             YUVA_IN(y, u, v, a, p, pal);
             u1 += u;
             v1 += v;
             a1 += a;
             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
             cb++;
             cr++;
             p += -wrap3 + BPP;
             lum += -wrap + 1;
         }

         for(w = dstw - (dstx & 1); w >= 2; w -= 2) {

             YUVA_IN(y, u, v, a, p, pal);
             u1 = u;
             v1 = v;
             a1 = a;
             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 

             YUVA_IN(y, u, v, a, p + BPP, pal);

             u1 += u;
             v1 += v;
             a1 += a;
             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
             p += wrap3;
             lum += wrap;
 
             YUVA_IN(y, u, v, a, p, pal);
             u1 += u;
             v1 += v;
             a1 += a;
             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 

             YUVA_IN(y, u, v, a, p + BPP, pal);

             u1 += u;
             v1 += v;
             a1 += a;
             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
 
             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 2);
             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 2);
 
             cb++;
             cr++;
             p += -wrap3 + 2 * BPP;
             lum += -wrap + 2;
         }
         if (w) {
             YUVA_IN(y, u, v, a, p, pal);
             u1 = u;
             v1 = v;
             a1 = a;
             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
             p += wrap3;
             lum += wrap;
             YUVA_IN(y, u, v, a, p, pal);
             u1 += u;
             v1 += v;
             a1 += a;
             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
             cb++;
             cr++;
             p += -wrap3 + BPP;
             lum += -wrap + 1;
         }

         p += wrap3 + (wrap3 - dstw * BPP);
         lum += wrap + (wrap - dstw - dstx);

         cb += dst->linesize[1] - width2 - skip2;
         cr += dst->linesize[2] - width2 - skip2;
     }
     /* handle odd height */
     if (h) {

         lum += dstx;

         cb += skip2;
         cr += skip2;

         if (dstx & 1) {

             YUVA_IN(y, u, v, a, p, pal);
             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
             cb++;
             cr++;
             lum++;
             p += BPP;
         }

         for(w = dstw - (dstx & 1); w >= 2; w -= 2) {

             YUVA_IN(y, u, v, a, p, pal);
             u1 = u;
             v1 = v;
             a1 = a;
             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
 
             YUVA_IN(y, u, v, a, p + BPP, pal);
             u1 += u;
             v1 += v;
             a1 += a;
             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u, 1);
             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v, 1);
             cb++;
             cr++;
             p += 2 * BPP;
             lum += 2;
         }
         if (w) {
             YUVA_IN(y, u, v, a, p, pal);
             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
         }
     }
 }
 
 static void free_subpicture(SubPicture *sp)
 {

     avsubtitle_free(&sp->sub);

 }
 

 static void video_image_display(VideoState *is)
 {
     VideoPicture *vp;

     SubPicture *sp;
     AVPicture pict;

     float aspect_ratio;
     int width, height, x, y;
     SDL_Rect rect;

     int i;

 
     vp = &is->pictq[is->pictq_rindex];
     if (vp->bmp) {

 #if CONFIG_AVFILTER

          if (vp->picref->video->sample_aspect_ratio.num == 0)

              aspect_ratio = 0;
          else

              aspect_ratio = av_q2d(vp->picref->video->sample_aspect_ratio);

 #else
 

         /* XXX: use variable in the frame */

         if (is->video_st->sample_aspect_ratio.num)
             aspect_ratio = av_q2d(is->video_st->sample_aspect_ratio);
         else if (is->video_st->codec->sample_aspect_ratio.num)
             aspect_ratio = av_q2d(is->video_st->codec->sample_aspect_ratio);

         else

             aspect_ratio = 0;

 #endif

         if (aspect_ratio <= 0.0)

             aspect_ratio = 1.0;

         aspect_ratio *= (float)vp->width / (float)vp->height;

         if (is->subtitle_st) {
             if (is->subpq_size > 0) {

                 sp = &is->subpq[is->subpq_rindex];
 

                 if (vp->pts >= sp->pts + ((float) sp->sub.start_display_time / 1000)) {

                     SDL_LockYUVOverlay (vp->bmp);
 
                     pict.data[0] = vp->bmp->pixels[0];
                     pict.data[1] = vp->bmp->pixels[2];
                     pict.data[2] = vp->bmp->pixels[1];
 
                     pict.linesize[0] = vp->bmp->pitches[0];
                     pict.linesize[1] = vp->bmp->pitches[2];
                     pict.linesize[2] = vp->bmp->pitches[1];
 
                     for (i = 0; i < sp->sub.num_rects; i++)

                         blend_subrect(&pict, sp->sub.rects[i],

                                       vp->bmp->w, vp->bmp->h);

 
                     SDL_UnlockYUVOverlay (vp->bmp);
                 }
             }
         }
 
 

         /* XXX: we suppose the screen has a 1.0 pixel ratio */
         height = is->height;

         width = ((int)rint(height * aspect_ratio)) & ~1;

         if (width > is->width) {
             width = is->width;

             height = ((int)rint(width / aspect_ratio)) & ~1;

         }
         x = (is->width - width) / 2;
         y = (is->height - height) / 2;

         is->no_background = 0;

         rect.x = is->xleft + x;

         rect.y = is->ytop  + y;

         rect.w = FFMAX(width,  1);
         rect.h = FFMAX(height, 1);

         SDL_DisplayYUVOverlay(vp->bmp, &rect);
     }
 }
 

 /* get the current audio output buffer size, in samples. With SDL, we
    cannot have a precise information */
 static int audio_write_get_buf_size(VideoState *is)
 {
     return is->audio_buf_size - is->audio_buf_index;
 }
 

 static inline int compute_mod(int a, int b)
 {

     return a < 0 ? a%b + b : a%b;

 }
 
 static void video_audio_display(VideoState *s)
 {
     int i, i_start, x, y1, y, ys, delay, n, nb_display_channels;
     int ch, channels, h, h2, bgcolor, fgcolor;
     int16_t time_diff;

     int rdft_bits, nb_freq;
 
     for(rdft_bits=1; (1<<rdft_bits)<2*s->height; rdft_bits++)
         ;
     nb_freq= 1<<(rdft_bits-1);

     /* compute display index : center on currently output samples */

     channels = s->audio_st->codec->channels;

     nb_display_channels = channels;

     if (!s->paused) {

         int data_used= s->show_mode == SHOW_MODE_WAVES ? s->width : (2*nb_freq);

         n = 2 * channels;
         delay = audio_write_get_buf_size(s);
         delay /= n;

         /* to be more precise, we take into account the time spent since
            the last buffer computation */
         if (audio_callback_time) {
             time_diff = av_gettime() - audio_callback_time;

             delay -= (time_diff * s->audio_st->codec->sample_rate) / 1000000;

         }

         delay += 2*data_used;

         if (delay < data_used)
             delay = data_used;

 
         i_start= x = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);

         if (s->show_mode == SHOW_MODE_WAVES) {

             h= INT_MIN;
             for(i=0; i<1000; i+=channels){
                 int idx= (SAMPLE_ARRAY_SIZE + x - i) % SAMPLE_ARRAY_SIZE;
                 int a= s->sample_array[idx];
                 int b= s->sample_array[(idx + 4*channels)%SAMPLE_ARRAY_SIZE];
                 int c= s->sample_array[(idx + 5*channels)%SAMPLE_ARRAY_SIZE];
                 int d= s->sample_array[(idx + 9*channels)%SAMPLE_ARRAY_SIZE];
                 int score= a-d;
                 if(h<score && (b^c)<0){
                     h= score;
                     i_start= idx;
                 }

             }
         }
 

         s->last_i_start = i_start;
     } else {
         i_start = s->last_i_start;

     }
 
     bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);

     if (s->show_mode == SHOW_MODE_WAVES) {

         fill_rectangle(screen,
                        s->xleft, s->ytop, s->width, s->height,
                        bgcolor);
 
         fgcolor = SDL_MapRGB(screen->format, 0xff, 0xff, 0xff);
 
         /* total height for one channel */
         h = s->height / nb_display_channels;
         /* graph height / 2 */
         h2 = (h * 9) / 20;
         for(ch = 0;ch < nb_display_channels; ch++) {
             i = i_start + ch;
             y1 = s->ytop + ch * h + (h / 2); /* position of center line */
             for(x = 0; x < s->width; x++) {
                 y = (s->sample_array[i] * h2) >> 15;
                 if (y < 0) {
                     y = -y;
                     ys = y1 - y;
                 } else {
                     ys = y1;
                 }
                 fill_rectangle(screen,
                                s->xleft + x, ys, 1, y,
                                fgcolor);
                 i += channels;
                 if (i >= SAMPLE_ARRAY_SIZE)
                     i -= SAMPLE_ARRAY_SIZE;

             }
         }
 

         fgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0xff);

         for(ch = 1;ch < nb_display_channels; ch++) {
             y = s->ytop + ch * h;
             fill_rectangle(screen,
                            s->xleft, y, s->width, 1,
                            fgcolor);
         }
         SDL_UpdateRect(screen, s->xleft, s->ytop, s->width, s->height);

     }else{
         nb_display_channels= FFMIN(nb_display_channels, 2);
         if(rdft_bits != s->rdft_bits){

             av_rdft_end(s->rdft);

             av_free(s->rdft_data);

             s->rdft = av_rdft_init(rdft_bits, DFT_R2C);

             s->rdft_bits= rdft_bits;

             s->rdft_data= av_malloc(4*nb_freq*sizeof(*s->rdft_data));

         }
         {

             FFTSample *data[2];

             for(ch = 0;ch < nb_display_channels; ch++) {

                 data[ch] = s->rdft_data + 2*nb_freq*ch;

                 i = i_start + ch;
                 for(x = 0; x < 2*nb_freq; x++) {
                     double w= (x-nb_freq)*(1.0/nb_freq);
                     data[ch][x]= s->sample_array[i]*(1.0-w*w);
                     i += channels;
                     if (i >= SAMPLE_ARRAY_SIZE)
                         i -= SAMPLE_ARRAY_SIZE;
                 }

                 av_rdft_calc(s->rdft, data[ch]);

             }
             //least efficient way to do this, we should of course directly access it but its more than fast enough

             for(y=0; y<s->height; y++){

                 double w= 1/sqrt(nb_freq);
                 int a= sqrt(w*sqrt(data[0][2*y+0]*data[0][2*y+0] + data[0][2*y+1]*data[0][2*y+1]));

                 int b= (nb_display_channels == 2 ) ? sqrt(w*sqrt(data[1][2*y+0]*data[1][2*y+0]
                        + data[1][2*y+1]*data[1][2*y+1])) : a;

                 a= FFMIN(a,255);
                 b= FFMIN(b,255);
                 fgcolor = SDL_MapRGB(screen->format, a, b, (a+b)/2);
 
                 fill_rectangle(screen,
                             s->xpos, s->height-y, 1, 1,
                             fgcolor);
             }
         }
         SDL_UpdateRect(screen, s->xpos, s->ytop, 1, s->height);
         s->xpos++;
         if(s->xpos >= s->width)
             s->xpos= s->xleft;
     }

 }
 

 static void stream_close(VideoState *is)
 {
     VideoPicture *vp;
     int i;
     /* XXX: use a special url_shutdown call to abort parse cleanly */
     is->abort_request = 1;
     SDL_WaitThread(is->read_tid, NULL);
     SDL_WaitThread(is->refresh_tid, NULL);
 
     /* free all pictures */
     for(i=0;i<VIDEO_PICTURE_QUEUE_SIZE; i++) {
         vp = &is->pictq[i];
 #if CONFIG_AVFILTER
         if (vp->picref) {
             avfilter_unref_buffer(vp->picref);
             vp->picref = NULL;
         }
 #endif
         if (vp->bmp) {
             SDL_FreeYUVOverlay(vp->bmp);
             vp->bmp = NULL;
         }
     }
     SDL_DestroyMutex(is->pictq_mutex);
     SDL_DestroyCond(is->pictq_cond);
     SDL_DestroyMutex(is->subpq_mutex);
     SDL_DestroyCond(is->subpq_cond);
 #if !CONFIG_AVFILTER
     if (is->img_convert_ctx)
         sws_freeContext(is->img_convert_ctx);
 #endif
     av_free(is);
 }
 
 static void do_exit(void)
 {
     if (cur_stream) {
         stream_close(cur_stream);
         cur_stream = NULL;
     }
     uninit_opts();
 #if CONFIG_AVFILTER
     avfilter_uninit();
 #endif
     if (show_status)
         printf("\n");
     SDL_Quit();

     av_log(NULL, AV_LOG_QUIET, "%s", "");

     exit(0);
 }
 

 static int video_open(VideoState *is){
     int flags = SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL;
     int w,h;
 

     if(is_full_screen) flags |= SDL_FULLSCREEN;
     else               flags |= SDL_RESIZABLE;
 

     if (is_full_screen && fs_screen_width) {
         w = fs_screen_width;
         h = fs_screen_height;

     } else if(!is_full_screen && screen_width){
         w = screen_width;
         h = screen_height;

 #if CONFIG_AVFILTER
     }else if (is->out_video_filter && is->out_video_filter->inputs[0]){
         w = is->out_video_filter->inputs[0]->w;
         h = is->out_video_filter->inputs[0]->h;
 #else

     }else if (is->video_st && is->video_st->codec->width){
         w = is->video_st->codec->width;
         h = is->video_st->codec->height;

 #endif

     } else {

         w = 640;
         h = 480;

     }

     if(screen && is->width == screen->w && screen->w == w
        && is->height== screen->h && screen->h == h)
         return 0;
 

 #ifndef __APPLE__

     screen = SDL_SetVideoMode(w, h, 0, flags);
 #else
     /* setting bits_per_pixel = 0 or 32 causes blank video on OS X */
     screen = SDL_SetVideoMode(w, h, 24, flags);
 #endif
     if (!screen) {
         fprintf(stderr, "SDL: could not set video mode - exiting\n");

         do_exit();

     }

     if (!window_title)
         window_title = input_filename;
     SDL_WM_SetCaption(window_title, window_title);

 
     is->width = screen->w;
     is->height = screen->h;
 
     return 0;
 }

 /* display the current picture, if any */
 static void video_display(VideoState *is)
 {

     if(!screen)
         video_open(cur_stream);

     if (is->audio_st && is->show_mode != SHOW_MODE_VIDEO)

         video_audio_display(is);
     else if (is->video_st)
         video_image_display(is);
 }
 

 static int refresh_thread(void *opaque)

 {

     VideoState *is= opaque;
     while(!is->abort_request){

         SDL_Event event;
         event.type = FF_REFRESH_EVENT;
         event.user.data1 = opaque;

         if(!is->refresh){
             is->refresh=1;

             SDL_PushEvent(&event);

         }

         //FIXME ideally we should wait the correct time but SDLs event passing is so slow it would be silly
         usleep(is->audio_st && is->show_mode != SHOW_MODE_VIDEO ? rdftspeed*1000 : 5000);

     }
     return 0;

 }
 

 /* get the current audio clock value */
 static double get_audio_clock(VideoState *is)
 {
     double pts;
     int hw_buf_size, bytes_per_sec;
     pts = is->audio_clock;
     hw_buf_size = audio_write_get_buf_size(is);
     bytes_per_sec = 0;
     if (is->audio_st) {

         bytes_per_sec = is->audio_st->codec->sample_rate *

             2 * is->audio_st->codec->channels;

     }
     if (bytes_per_sec)
         pts -= (double)hw_buf_size / bytes_per_sec;
     return pts;
 }
 
 /* get the current video clock value */
 static double get_video_clock(VideoState *is)
 {

     if (is->paused) {

         return is->video_current_pts;

     } else {

         return is->video_current_pts_drift + av_gettime() / 1000000.0;

     }

 }
 
 /* get the current external clock value */
 static double get_external_clock(VideoState *is)
 {
     int64_t ti;
     ti = av_gettime();
     return is->external_clock + ((ti - is->external_clock_time) * 1e-6);
 }
 
 /* get the current master clock value */
 static double get_master_clock(VideoState *is)
 {
     double val;
 

     if (is->av_sync_type == AV_SYNC_VIDEO_MASTER) {
         if (is->video_st)
             val = get_video_clock(is);
         else
             val = get_audio_clock(is);
     } else if (is->av_sync_type == AV_SYNC_AUDIO_MASTER) {
         if (is->audio_st)
             val = get_audio_clock(is);
         else
             val = get_video_clock(is);
     } else {

         val = get_external_clock(is);

     }

     return val;
 }
 

 /* seek in the stream */

 static void stream_seek(VideoState *is, int64_t pos, int64_t rel, int seek_by_bytes)

 {

     if (!is->seek_req) {
         is->seek_pos = pos;

         is->seek_rel = rel;

         is->seek_flags &= ~AVSEEK_FLAG_BYTE;

         if (seek_by_bytes)
             is->seek_flags |= AVSEEK_FLAG_BYTE;

         is->seek_req = 1;
     }

 }
 
 /* pause or resume the video */

 static void stream_toggle_pause(VideoState *is)

 {

     if (is->paused) {
         is->frame_timer += av_gettime() / 1000000.0 + is->video_current_pts_drift - is->video_current_pts;

         if(is->read_pause_return != AVERROR(ENOSYS)){

             is->video_current_pts = is->video_current_pts_drift + av_gettime() / 1000000.0;

         }

         is->video_current_pts_drift = is->video_current_pts - av_gettime() / 1000000.0;

     }

     is->paused = !is->paused;

 }
 

 static double compute_target_time(double frame_current_pts, VideoState *is)

 {

     double delay, sync_threshold, diff;

 
     /* compute nominal delay */
     delay = frame_current_pts - is->frame_last_pts;
     if (delay <= 0 || delay >= 10.0) {
         /* if incorrect delay, use previous one */
         delay = is->frame_last_delay;

     } else {

         is->frame_last_delay = delay;

     }

     is->frame_last_pts = frame_current_pts;
 
     /* update delay to follow master synchronisation source */
     if (((is->av_sync_type == AV_SYNC_AUDIO_MASTER && is->audio_st) ||
          is->av_sync_type == AV_SYNC_EXTERNAL_CLOCK)) {
         /* if video is slave, we try to correct big delays by
            duplicating or deleting a frame */

         diff = get_video_clock(is) - get_master_clock(is);

 
         /* skip or repeat frame. We take into account the
            delay to compute the threshold. I still don't know
            if it is the best guess */
         sync_threshold = FFMAX(AV_SYNC_THRESHOLD, delay);
         if (fabs(diff) < AV_NOSYNC_THRESHOLD) {
             if (diff <= -sync_threshold)
                 delay = 0;
             else if (diff >= sync_threshold)
                 delay = 2 * delay;
         }
     }
     is->frame_timer += delay;

 
     av_dlog(NULL, "video: delay=%0.3f pts=%0.3f A-V=%f\n",
             delay, frame_current_pts, -diff);

     return is->frame_timer;

 }
 

 /* called to display each frame */

 static void video_refresh(void *opaque)

 {
     VideoState *is = opaque;
     VideoPicture *vp;

     SubPicture *sp, *sp2;

 
     if (is->video_st) {

 retry:

         if (is->pictq_size == 0) {

             //nothing to do, no picture to display in the que

         } else {

             double time= av_gettime()/1000000.0;
             double next_target;

             /* dequeue the picture */

             vp = &is->pictq[is->pictq_rindex];

             if(time < vp->target_clock)
                 return;

             /* update current video pts */
             is->video_current_pts = vp->pts;

             is->video_current_pts_drift = is->video_current_pts - time;

             is->video_current_pos = vp->pos;

             if(is->pictq_size > 1){
                 VideoPicture *nextvp= &is->pictq[(is->pictq_rindex+1)%VIDEO_PICTURE_QUEUE_SIZE];
                 assert(nextvp->target_clock >= vp->target_clock);
                 next_target= nextvp->target_clock;
             }else{
                 next_target= vp->target_clock + is->video_clock - vp->pts; //FIXME pass durations cleanly
             }

             if((framedrop>0 || (framedrop && is->audio_st)) && time > next_target){

                 is->skip_frames *= 1.0 + FRAME_SKIP_FACTOR;
                 if(is->pictq_size > 1 || time > next_target + 0.5){
                     /* update queue size and signal for next picture */
                     if (++is->pictq_rindex == VIDEO_PICTURE_QUEUE_SIZE)
                         is->pictq_rindex = 0;
 
                     SDL_LockMutex(is->pictq_mutex);
                     is->pictq_size--;
                     SDL_CondSignal(is->pictq_cond);
                     SDL_UnlockMutex(is->pictq_mutex);
                     goto retry;
                 }
             }

             if(is->subtitle_st) {
                 if (is->subtitle_stream_changed) {
                     SDL_LockMutex(is->subpq_mutex);

                     while (is->subpq_size) {
                         free_subpicture(&is->subpq[is->subpq_rindex]);

                         /* update queue size and signal for next picture */
                         if (++is->subpq_rindex == SUBPICTURE_QUEUE_SIZE)
                             is->subpq_rindex = 0;

                         is->subpq_size--;
                     }
                     is->subtitle_stream_changed = 0;
 
                     SDL_CondSignal(is->subpq_cond);
                     SDL_UnlockMutex(is->subpq_mutex);
                 } else {
                     if (is->subpq_size > 0) {
                         sp = &is->subpq[is->subpq_rindex];
 
                         if (is->subpq_size > 1)
                             sp2 = &is->subpq[(is->subpq_rindex + 1) % SUBPICTURE_QUEUE_SIZE];
                         else
                             sp2 = NULL;
 
                         if ((is->video_current_pts > (sp->pts + ((float) sp->sub.end_display_time / 1000)))
                                 || (sp2 && is->video_current_pts > (sp2->pts + ((float) sp2->sub.start_display_time / 1000))))
                         {
                             free_subpicture(sp);
 
                             /* update queue size and signal for next picture */
                             if (++is->subpq_rindex == SUBPICTURE_QUEUE_SIZE)
                                 is->subpq_rindex = 0;
 
                             SDL_LockMutex(is->subpq_mutex);
                             is->subpq_size--;
                             SDL_CondSignal(is->subpq_cond);
                             SDL_UnlockMutex(is->subpq_mutex);
                         }
                     }
                 }
             }
 

             /* display picture */

             if (!display_disable)

                 video_display(is);

             /* update queue size and signal for next picture */
             if (++is->pictq_rindex == VIDEO_PICTURE_QUEUE_SIZE)
                 is->pictq_rindex = 0;

             SDL_LockMutex(is->pictq_mutex);
             is->pictq_size--;
             SDL_CondSignal(is->pictq_cond);
             SDL_UnlockMutex(is->pictq_mutex);
         }
     } else if (is->audio_st) {
         /* draw the next audio frame */
 
         /* if only audio stream, then display the audio bars (better
            than nothing, just to test the implementation */

         /* display picture */

         if (!display_disable)

             video_display(is);

     }
     if (show_status) {
         static int64_t last_time;
         int64_t cur_time;

         int aqsize, vqsize, sqsize;

         double av_diff;

         cur_time = av_gettime();

         if (!last_time || (cur_time - last_time) >= 30000) {

             aqsize = 0;
             vqsize = 0;

             sqsize = 0;

             if (is->audio_st)
                 aqsize = is->audioq.size;
             if (is->video_st)
                 vqsize = is->videoq.size;

             if (is->subtitle_st)
                 sqsize = is->subtitleq.size;

             av_diff = 0;
             if (is->audio_st && is->video_st)
                 av_diff = get_audio_clock(is) - get_video_clock(is);

             printf("%7.2f A-V:%7.3f s:%3.1f aq=%5dKB vq=%5dKB sq=%5dB f=%"PRId64"/%"PRId64"   \r",

                    get_master_clock(is),
                    av_diff,
                    FFMAX(is->skip_frames-1, 0),
                    aqsize / 1024,
                    vqsize / 1024,
                    sqsize,
                    is->video_st ? is->video_st->codec->pts_correction_num_faulty_dts : 0,
                    is->video_st ? is->video_st->codec->pts_correction_num_faulty_pts : 0);

             fflush(stdout);
             last_time = cur_time;
         }
     }
 }
 
 /* allocate a picture (needs to do that in main thread to avoid
    potential locking problems */
 static void alloc_picture(void *opaque)
 {
     VideoState *is = opaque;
     VideoPicture *vp;
 
     vp = &is->pictq[is->pictq_windex];
 
     if (vp->bmp)
         SDL_FreeYUVOverlay(vp->bmp);
 

 #if CONFIG_AVFILTER
     if (vp->picref)

         avfilter_unref_buffer(vp->picref);

     vp->picref = NULL;
 
     vp->width   = is->out_video_filter->inputs[0]->w;
     vp->height  = is->out_video_filter->inputs[0]->h;
     vp->pix_fmt = is->out_video_filter->inputs[0]->format;
 #else
     vp->width   = is->video_st->codec->width;
     vp->height  = is->video_st->codec->height;
     vp->pix_fmt = is->video_st->codec->pix_fmt;
 #endif
 
     vp->bmp = SDL_CreateYUVOverlay(vp->width, vp->height,

                                    SDL_YV12_OVERLAY,

                                    screen);

     if (!vp->bmp || vp->bmp->pitches[0] < vp->width) {
         /* SDL allocates a buffer smaller than requested if the video
          * overlay hardware is unable to support the requested size. */
         fprintf(stderr, "Error: the video system does not support an image\n"

                         "size of %dx%d pixels. Try using -lowres or -vf \"scale=w:h\"\n"

                         "to reduce the image size.\n", vp->width, vp->height );
         do_exit();
     }

 
     SDL_LockMutex(is->pictq_mutex);
     vp->allocated = 1;
     SDL_CondSignal(is->pictq_cond);
     SDL_UnlockMutex(is->pictq_mutex);
 }
 

 static int queue_picture(VideoState *is, AVFrame *src_frame, double pts1, int64_t pos)

 {
     VideoPicture *vp;

     double frame_delay, pts = pts1;
 
     /* compute the exact PTS for the picture if it is omitted in the stream
      * pts1 is the dts of the pkt / pts of the frame */
     if (pts != 0) {
         /* update video clock with pts, if present */
         is->video_clock = pts;
     } else {
         pts = is->video_clock;
     }
     /* update video clock for next frame */
     frame_delay = av_q2d(is->video_st->codec->time_base);
     /* for MPEG2, the frame can be repeated, so we update the
        clock accordingly */
     frame_delay += src_frame->repeat_pict * (frame_delay * 0.5);
     is->video_clock += frame_delay;
 
 #if defined(DEBUG_SYNC) && 0
     printf("frame_type=%c clock=%0.3f pts=%0.3f\n",

            av_get_picture_type_char(src_frame->pict_type), pts, pts1);

 #endif

     /* wait until we have space to put a new picture */
     SDL_LockMutex(is->pictq_mutex);

 
     if(is->pictq_size>=VIDEO_PICTURE_QUEUE_SIZE && !is->refresh)
         is->skip_frames= FFMAX(1.0 - FRAME_SKIP_FACTOR, is->skip_frames * (1.0-FRAME_SKIP_FACTOR));
 

     while (is->pictq_size >= VIDEO_PICTURE_QUEUE_SIZE &&
            !is->videoq.abort_request) {
         SDL_CondWait(is->pictq_cond, is->pictq_mutex);
     }
     SDL_UnlockMutex(is->pictq_mutex);

     if (is->videoq.abort_request)
         return -1;
 
     vp = &is->pictq[is->pictq_windex];
 
     /* alloc or resize hardware picture buffer */

     if (!vp->bmp ||

 #if CONFIG_AVFILTER
         vp->width  != is->out_video_filter->inputs[0]->w ||
         vp->height != is->out_video_filter->inputs[0]->h) {
 #else

         vp->width != is->video_st->codec->width ||
         vp->height != is->video_st->codec->height) {

 #endif

         SDL_Event event;
 
         vp->allocated = 0;
 
         /* the allocation must be done in the main thread to avoid
            locking problems */
         event.type = FF_ALLOC_EVENT;
         event.user.data1 = is;
         SDL_PushEvent(&event);

         /* wait until the picture is allocated */
         SDL_LockMutex(is->pictq_mutex);
         while (!vp->allocated && !is->videoq.abort_request) {
             SDL_CondWait(is->pictq_cond, is->pictq_mutex);
         }
         SDL_UnlockMutex(is->pictq_mutex);
 
         if (is->videoq.abort_request)
             return -1;
     }
 

     /* if the frame is not skipped, then display it */

     if (vp->bmp) {

         AVPicture pict;

 #if CONFIG_AVFILTER
         if(vp->picref)

             avfilter_unref_buffer(vp->picref);

         vp->picref = src_frame->opaque;
 #endif

         /* get a pointer on the bitmap */
         SDL_LockYUVOverlay (vp->bmp);
 

         memset(&pict,0,sizeof(AVPicture));

         pict.data[0] = vp->bmp->pixels[0];
         pict.data[1] = vp->bmp->pixels[2];
         pict.data[2] = vp->bmp->pixels[1];
 
         pict.linesize[0] = vp->bmp->pitches[0];
         pict.linesize[1] = vp->bmp->pitches[2];
         pict.linesize[2] = vp->bmp->pitches[1];

 
 #if CONFIG_AVFILTER
         //FIXME use direct rendering

         av_picture_copy(&pict, (AVPicture *)src_frame,

                         vp->pix_fmt, vp->width, vp->height);
 #else

         sws_flags = av_get_int(sws_opts, "sws_flags", NULL);

         is->img_convert_ctx = sws_getCachedContext(is->img_convert_ctx,

             vp->width, vp->height, vp->pix_fmt, vp->width, vp->height,

             PIX_FMT_YUV420P, sws_flags, NULL, NULL, NULL);

         if (is->img_convert_ctx == NULL) {

             fprintf(stderr, "Cannot initialize the conversion context\n");
             exit(1);
         }

         sws_scale(is->img_convert_ctx, src_frame->data, src_frame->linesize,

                   0, vp->height, pict.data, pict.linesize);
 #endif

         /* update the bitmap content */
         SDL_UnlockYUVOverlay(vp->bmp);
 

         vp->pts = pts;

         vp->pos = pos;

 
         /* now we can update the picture count */
         if (++is->pictq_windex == VIDEO_PICTURE_QUEUE_SIZE)
             is->pictq_windex = 0;
         SDL_LockMutex(is->pictq_mutex);

         vp->target_clock= compute_target_time(vp->pts, is);
 

         is->pictq_size++;
         SDL_UnlockMutex(is->pictq_mutex);
     }

     return 0;
 }
 

 static int get_video_frame(VideoState *is, AVFrame *frame, int64_t *pts, AVPacket *pkt)

 {

     int len1 av_unused, got_picture, i;

     if (packet_queue_get(&is->videoq, pkt, 1) < 0)
         return -1;

     if (pkt->data == flush_pkt.data) {
         avcodec_flush_buffers(is->video_st->codec);

         SDL_LockMutex(is->pictq_mutex);
         //Make sure there are no long delay timers (ideally we should just flush the que but thats harder)
         for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++) {
             is->pictq[i].target_clock= 0;
         }
         while (is->pictq_size && !is->videoq.abort_request) {
             SDL_CondWait(is->pictq_cond, is->pictq_mutex);

         }

         is->video_current_pos = -1;
         SDL_UnlockMutex(is->pictq_mutex);

         is->frame_last_pts = AV_NOPTS_VALUE;
         is->frame_last_delay = 0;
         is->frame_timer = (double)av_gettime() / 1000000.0;
         is->skip_frames = 1;
         is->skip_frames_index = 0;
         return 0;
     }

     len1 = avcodec_decode_video2(is->video_st->codec,
                                  frame, &got_picture,
                                  pkt);
 
     if (got_picture) {
         if (decoder_reorder_pts == -1) {

             *pts = frame->best_effort_timestamp;

         } else if (decoder_reorder_pts) {

             *pts = frame->pkt_pts;

         } else {

             *pts = frame->pkt_dts;

         }
 
         if (*pts == AV_NOPTS_VALUE) {
             *pts = 0;

         }

         is->skip_frames_index += 1;
         if(is->skip_frames_index >= is->skip_frames){
             is->skip_frames_index -= FFMAX(is->skip_frames, 1.0);
             return 1;
         }
 
     }

     return 0;
 }
 
 #if CONFIG_AVFILTER
 typedef struct {
     VideoState *is;
     AVFrame *frame;

     int use_dr1;

 } FilterPriv;
 

 static int input_get_buffer(AVCodecContext *codec, AVFrame *pic)
 {
     AVFilterContext *ctx = codec->opaque;

     AVFilterBufferRef  *ref;

     int perms = AV_PERM_WRITE;

     int i, w, h, stride[4];

     unsigned edge;

     int pixel_size;

     av_assert0(codec->flags & CODEC_FLAG_EMU_EDGE);
 

     if (codec->codec->capabilities & CODEC_CAP_NEG_LINESIZES)
         perms |= AV_PERM_NEG_LINESIZES;
 

     if(pic->buffer_hints & FF_BUFFER_HINTS_VALID) {
         if(pic->buffer_hints & FF_BUFFER_HINTS_READABLE) perms |= AV_PERM_READ;
         if(pic->buffer_hints & FF_BUFFER_HINTS_PRESERVE) perms |= AV_PERM_PRESERVE;
         if(pic->buffer_hints & FF_BUFFER_HINTS_REUSABLE) perms |= AV_PERM_REUSE2;
     }
     if(pic->reference) perms |= AV_PERM_READ | AV_PERM_PRESERVE;
 
     w = codec->width;
     h = codec->height;

 
     if(av_image_check_size(w, h, 0, codec))
         return -1;
 

     avcodec_align_dimensions2(codec, &w, &h, stride);
     edge = codec->flags & CODEC_FLAG_EMU_EDGE ? 0 : avcodec_get_edge_width();
     w += edge << 1;
     h += edge << 1;
 
     if(!(ref = avfilter_get_video_buffer(ctx->outputs[0], perms, w, h)))
         return -1;
 

     pixel_size = av_pix_fmt_descriptors[ref->format].comp[0].step_minus1+1;

     ref->video->w = codec->width;
     ref->video->h = codec->height;

     for(i = 0; i < 4; i ++) {

         unsigned hshift = (i == 1 || i == 2) ? av_pix_fmt_descriptors[ref->format].log2_chroma_w : 0;
         unsigned vshift = (i == 1 || i == 2) ? av_pix_fmt_descriptors[ref->format].log2_chroma_h : 0;

         if (ref->data[i]) {

             ref->data[i]    += ((edge * pixel_size) >> hshift) + ((edge * ref->linesize[i]) >> vshift);

         }

         pic->data[i]     = ref->data[i];
         pic->linesize[i] = ref->linesize[i];
     }
     pic->opaque = ref;
     pic->age    = INT_MAX;
     pic->type   = FF_BUFFER_TYPE_USER;

     pic->reordered_opaque = codec->reordered_opaque;

     if(codec->pkt) pic->pkt_pts = codec->pkt->pts;
     else           pic->pkt_pts = AV_NOPTS_VALUE;

     return 0;
 }
 
 static void input_release_buffer(AVCodecContext *codec, AVFrame *pic)
 {
     memset(pic->data, 0, sizeof(pic->data));

     avfilter_unref_buffer(pic->opaque);

 }
 

 static int input_reget_buffer(AVCodecContext *codec, AVFrame *pic)
 {

     AVFilterBufferRef *ref = pic->opaque;

 
     if (pic->data[0] == NULL) {
         pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
         return codec->get_buffer(codec, pic);
     }
 

     if ((codec->width != ref->video->w) || (codec->height != ref->video->h) ||

         (codec->pix_fmt != ref->format)) {

         av_log(codec, AV_LOG_ERROR, "Picture properties changed.\n");
         return -1;
     }
 
     pic->reordered_opaque = codec->reordered_opaque;

     if(codec->pkt) pic->pkt_pts = codec->pkt->pts;
     else           pic->pkt_pts = AV_NOPTS_VALUE;

     return 0;
 }
 

 static int input_init(AVFilterContext *ctx, const char *args, void *opaque)
 {
     FilterPriv *priv = ctx->priv;

     AVCodecContext *codec;

     if(!opaque) return -1;
 
     priv->is = opaque;

     codec    = priv->is->video_st->codec;
     codec->opaque = ctx;

     if((codec->codec->capabilities & CODEC_CAP_DR1)
     ) {

         av_assert0(codec->flags & CODEC_FLAG_EMU_EDGE);

         priv->use_dr1 = 1;
         codec->get_buffer     = input_get_buffer;
         codec->release_buffer = input_release_buffer;

         codec->reget_buffer   = input_reget_buffer;

         codec->thread_safe_callbacks = 1;

     }
 

     priv->frame = avcodec_alloc_frame();
 
     return 0;
 }
 
 static void input_uninit(AVFilterContext *ctx)
 {
     FilterPriv *priv = ctx->priv;
     av_free(priv->frame);
 }
 
 static int input_request_frame(AVFilterLink *link)
 {
     FilterPriv *priv = link->src->priv;

     AVFilterBufferRef *picref;

     int64_t pts = 0;

     AVPacket pkt;
     int ret;
 
     while (!(ret = get_video_frame(priv->is, priv->frame, &pts, &pkt)))
         av_free_packet(&pkt);
     if (ret < 0)
         return -1;
 

     if(priv->use_dr1 && priv->frame->opaque) {

         picref = avfilter_ref_buffer(priv->frame->opaque, ~0);

     } else {

         picref = avfilter_get_video_buffer(link, AV_PERM_WRITE, link->w, link->h);

         av_image_copy(picref->data, picref->linesize,

                       priv->frame->data, priv->frame->linesize,
                       picref->format, link->w, link->h);

     }

     av_free_packet(&pkt);
 

     avfilter_copy_frame_props(picref, priv->frame);

     picref->pts = pts;

     avfilter_start_frame(link, picref);

     avfilter_draw_slice(link, 0, link->h, 1);
     avfilter_end_frame(link);
 
     return 0;
 }
 
 static int input_query_formats(AVFilterContext *ctx)
 {
     FilterPriv *priv = ctx->priv;
     enum PixelFormat pix_fmts[] = {
         priv->is->video_st->codec->pix_fmt, PIX_FMT_NONE
     };
 

     avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts));

     return 0;
 }
 
 static int input_config_props(AVFilterLink *link)
 {
     FilterPriv *priv  = link->src->priv;
     AVCodecContext *c = priv->is->video_st->codec;
 
     link->w = c->width;
     link->h = c->height;

     link->time_base = priv->is->video_st->time_base;

 
     return 0;
 }
 
 static AVFilter input_filter =
 {
     .name      = "ffplay_input",
 
     .priv_size = sizeof(FilterPriv),
 
     .init      = input_init,
     .uninit    = input_uninit,
 
     .query_formats = input_query_formats,
 
     .inputs    = (AVFilterPad[]) {{ .name = NULL }},
     .outputs   = (AVFilterPad[]) {{ .name = "default",

                                     .type = AVMEDIA_TYPE_VIDEO,

                                     .request_frame = input_request_frame,
                                     .config_props  = input_config_props, },
                                   { .name = NULL }},
 };
 

 static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const char *vfilters)

 {

     char sws_flags_str[128];

     int ret;

     enum PixelFormat pix_fmts[] = { PIX_FMT_YUV420P, PIX_FMT_NONE };

     AVFilterContext *filt_src = NULL, *filt_out = NULL;

     snprintf(sws_flags_str, sizeof(sws_flags_str), "flags=%d", sws_flags);
     graph->scale_sws_opts = av_strdup(sws_flags_str);

     if ((ret = avfilter_graph_create_filter(&filt_src, &input_filter, "src",
                                             NULL, is, graph)) < 0)

         goto the_end;

     if ((ret = avfilter_graph_create_filter(&filt_out, avfilter_get_by_name("buffersink"), "out",
                                             NULL, pix_fmts, graph)) < 0)

         goto the_end;

 
     if(vfilters) {

         AVFilterInOut *outputs = avfilter_inout_alloc();
         AVFilterInOut *inputs  = avfilter_inout_alloc();

 
         outputs->name    = av_strdup("in");

         outputs->filter_ctx = filt_src;

         outputs->pad_idx = 0;
         outputs->next    = NULL;
 
         inputs->name    = av_strdup("out");

         inputs->filter_ctx = filt_out;

         inputs->pad_idx = 0;
         inputs->next    = NULL;
 

         if ((ret = avfilter_graph_parse(graph, vfilters, &inputs, &outputs, NULL)) < 0)

             goto the_end;
         av_freep(&vfilters);
     } else {

         if ((ret = avfilter_link(filt_src, 0, filt_out, 0)) < 0)
             goto the_end;

     }
 

     if ((ret = avfilter_graph_config(graph, NULL)) < 0)

         goto the_end;

 
     is->out_video_filter = filt_out;

 the_end:
     return ret;
 }
 
 #endif  /* CONFIG_AVFILTER */
 
 static int video_thread(void *arg)
 {
     VideoState *is = arg;
     AVFrame *frame= avcodec_alloc_frame();

     int64_t pts_int = AV_NOPTS_VALUE, pos = -1;

     double pts;
     int ret;
 
 #if CONFIG_AVFILTER
     AVFilterGraph *graph = avfilter_graph_alloc();
     AVFilterContext *filt_out = NULL;
 
     if ((ret = configure_video_filters(graph, is, vfilters)) < 0)
         goto the_end;
     filt_out = is->out_video_filter;

 #endif
 
     for(;;) {
 #if !CONFIG_AVFILTER
         AVPacket pkt;

 #else

         AVFilterBufferRef *picref;

         AVRational tb = filt_out->inputs[0]->time_base;

 #endif
         while (is->paused && !is->videoq.abort_request)
             SDL_Delay(10);
 #if CONFIG_AVFILTER

         ret = av_vsink_buffer_get_video_buffer_ref(filt_out, &picref, 0);

         if (picref) {

             avfilter_fill_frame_from_video_buffer_ref(frame, picref);

             pts_int = picref->pts;
             pos     = picref->pos;
             frame->opaque = picref;
         }

 
         if (av_cmp_q(tb, is->video_st->time_base)) {

             av_unused int64_t pts1 = pts_int;

             pts_int = av_rescale_q(pts_int, tb, is->video_st->time_base);

             av_dlog(NULL, "video_thread(): "
                     "tb:%d/%d pts:%"PRId64" -> tb:%d/%d pts:%"PRId64"\n",
                     tb.num, tb.den, pts1,
                     is->video_st->time_base.num, is->video_st->time_base.den, pts_int);

         }

 #else
         ret = get_video_frame(is, frame, &pts_int, &pkt);

         pos = pkt.pos;

         av_free_packet(&pkt);

 #endif
 
         if (ret < 0) goto the_end;
 

 #if CONFIG_AVFILTER

         if (!picref)

             continue;

 #endif

         pts = pts_int*av_q2d(is->video_st->time_base);

         ret = queue_picture(is, frame, pts, pos);

         if (ret < 0)
             goto the_end;
 

         if (step)

             if (cur_stream)

                 stream_toggle_pause(cur_stream);

     }
  the_end:

 #if CONFIG_AVFILTER

     avfilter_graph_free(&graph);

 #endif

     av_free(frame);

     return 0;
 }
 

 static int subtitle_thread(void *arg)
 {
     VideoState *is = arg;
     SubPicture *sp;
     AVPacket pkt1, *pkt = &pkt1;

     int len1 av_unused, got_subtitle;

     double pts;
     int i, j;
     int r, g, b, y, u, v, a;
 
     for(;;) {
         while (is->paused && !is->subtitleq.abort_request) {
             SDL_Delay(10);
         }
         if (packet_queue_get(&is->subtitleq, pkt, 1) < 0)
             break;

         if(pkt->data == flush_pkt.data){
             avcodec_flush_buffers(is->subtitle_st->codec);
             continue;
         }

         SDL_LockMutex(is->subpq_mutex);
         while (is->subpq_size >= SUBPICTURE_QUEUE_SIZE &&
                !is->subtitleq.abort_request) {
             SDL_CondWait(is->subpq_cond, is->subpq_mutex);
         }
         SDL_UnlockMutex(is->subpq_mutex);

         if (is->subtitleq.abort_request)
             goto the_end;

         sp = &is->subpq[is->subpq_windex];
 
        /* NOTE: ipts is the PTS of the _first_ picture beginning in
            this packet, if any */
         pts = 0;
         if (pkt->pts != AV_NOPTS_VALUE)
             pts = av_q2d(is->subtitle_st->time_base)*pkt->pts;
 

         len1 = avcodec_decode_subtitle2(is->subtitle_st->codec,

                                     &sp->sub, &got_subtitle,

                                     pkt);

         if (got_subtitle && sp->sub.format == 0) {
             sp->pts = pts;

             for (i = 0; i < sp->sub.num_rects; i++)
             {

                 for (j = 0; j < sp->sub.rects[i]->nb_colors; j++)

                 {

                     RGBA_IN(r, g, b, a, (uint32_t*)sp->sub.rects[i]->pict.data[1] + j);

                     y = RGB_TO_Y_CCIR(r, g, b);
                     u = RGB_TO_U_CCIR(r, g, b, 0);
                     v = RGB_TO_V_CCIR(r, g, b, 0);

                     YUVA_OUT((uint32_t*)sp->sub.rects[i]->pict.data[1] + j, y, u, v, a);

                 }
             }
 
             /* now we can update the picture count */
             if (++is->subpq_windex == SUBPICTURE_QUEUE_SIZE)
                 is->subpq_windex = 0;
             SDL_LockMutex(is->subpq_mutex);
             is->subpq_size++;
             SDL_UnlockMutex(is->subpq_mutex);
         }
         av_free_packet(pkt);
     }
  the_end:
     return 0;
 }
 

 /* copy samples for viewing in editor window */
 static void update_sample_display(VideoState *is, short *samples, int samples_size)
 {

     int size, len;

 
     size = samples_size / sizeof(short);
     while (size > 0) {
         len = SAMPLE_ARRAY_SIZE - is->sample_array_index;
         if (len > size)
             len = size;
         memcpy(is->sample_array + is->sample_array_index, samples, len * sizeof(short));
         samples += len;
         is->sample_array_index += len;
         if (is->sample_array_index >= SAMPLE_ARRAY_SIZE)
             is->sample_array_index = 0;
         size -= len;
     }
 }
 
 /* return the new audio buffer size (samples can be added or deleted
    to get better sync if video or external master clock) */

 static int synchronize_audio(VideoState *is, short *samples,

                              int samples_size1, double pts)

 {

     int n, samples_size;

     double ref_clock;

     n = 2 * is->audio_st->codec->channels;

     samples_size = samples_size1;

 
     /* if not master, then we try to remove or add samples to correct the clock */
     if (((is->av_sync_type == AV_SYNC_VIDEO_MASTER && is->video_st) ||

          is->av_sync_type == AV_SYNC_EXTERNAL_CLOCK)) {
         double diff, avg_diff;

         int wanted_size, min_size, max_size, nb_samples;

         ref_clock = get_master_clock(is);
         diff = get_audio_clock(is) - ref_clock;

         if (diff < AV_NOSYNC_THRESHOLD) {
             is->audio_diff_cum = diff + is->audio_diff_avg_coef * is->audio_diff_cum;
             if (is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
                 /* not enough measures to have a correct estimate */
                 is->audio_diff_avg_count++;
             } else {
                 /* estimate the A-V difference */
                 avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
 
                 if (fabs(avg_diff) >= is->audio_diff_threshold) {

                     wanted_size = samples_size + ((int)(diff * is->audio_st->codec->sample_rate) * n);

                     nb_samples = samples_size / n;

                     min_size = ((nb_samples * (100 - SAMPLE_CORRECTION_PERCENT_MAX)) / 100) * n;
                     max_size = ((nb_samples * (100 + SAMPLE_CORRECTION_PERCENT_MAX)) / 100) * n;
                     if (wanted_size < min_size)
                         wanted_size = min_size;
                     else if (wanted_size > max_size)
                         wanted_size = max_size;

                     /* add or remove samples to correction the synchro */
                     if (wanted_size < samples_size) {
                         /* remove samples */
                         samples_size = wanted_size;
                     } else if (wanted_size > samples_size) {
                         uint8_t *samples_end, *q;
                         int nb;

                         /* add samples */
                         nb = (samples_size - wanted_size);
                         samples_end = (uint8_t *)samples + samples_size - n;
                         q = samples_end + n;
                         while (nb > 0) {
                             memcpy(q, samples_end, n);
                             q += n;
                             nb -= n;
                         }
                         samples_size = wanted_size;
                     }
                 }
 #if 0

                 printf("diff=%f adiff=%f sample_diff=%d apts=%0.3f vpts=%0.3f %f\n",
                        diff, avg_diff, samples_size - samples_size1,

                        is->audio_clock, is->video_clock, is->audio_diff_threshold);
 #endif

             }

         } else {
             /* too big difference : may be initial PTS errors, so
                reset A-V filter */
             is->audio_diff_avg_count = 0;
             is->audio_diff_cum = 0;

         }
     }
 
     return samples_size;
 }
 
 /* decode one audio frame and returns its uncompressed size */

 static int audio_decode_frame(VideoState *is, double *pts_ptr)

 {

     AVPacket *pkt_temp = &is->audio_pkt_temp;

     AVPacket *pkt = &is->audio_pkt;

     AVCodecContext *dec= is->audio_st->codec;

     int n, len1, data_size;

     double pts;
 
     for(;;) {

         /* NOTE: the audio packet can contain several frames */

         while (pkt_temp->size > 0) {

             data_size = sizeof(is->audio_buf1);

             len1 = avcodec_decode_audio3(dec,

                                         (int16_t *)is->audio_buf1, &data_size,

                                         pkt_temp);

             if (len1 < 0) {
                 /* if error, we skip the frame */

                 pkt_temp->size = 0;

                 break;

             }

             pkt_temp->data += len1;
             pkt_temp->size -= len1;

             if (data_size <= 0)
                 continue;

 
             if (dec->sample_fmt != is->audio_src_fmt) {
                 if (is->reformat_ctx)
                     av_audio_convert_free(is->reformat_ctx);

                 is->reformat_ctx= av_audio_convert_alloc(AV_SAMPLE_FMT_S16, 1,

                                                          dec->sample_fmt, 1, NULL, 0);
                 if (!is->reformat_ctx) {
                     fprintf(stderr, "Cannot convert %s sample format to %s sample format\n",

                         av_get_sample_fmt_name(dec->sample_fmt),

                         av_get_sample_fmt_name(AV_SAMPLE_FMT_S16));

                         break;
                 }
                 is->audio_src_fmt= dec->sample_fmt;
             }
 
             if (is->reformat_ctx) {
                 const void *ibuf[6]= {is->audio_buf1};
                 void *obuf[6]= {is->audio_buf2};

                 int istride[6]= {av_get_bytes_per_sample(dec->sample_fmt)};

                 int ostride[6]= {2};
                 int len= data_size/istride[0];
                 if (av_audio_convert(is->reformat_ctx, obuf, ostride, ibuf, istride, len)<0) {
                     printf("av_audio_convert() failed\n");
                     break;
                 }
                 is->audio_buf= is->audio_buf2;
                 /* FIXME: existing code assume that data_size equals framesize*channels*2
                           remove this legacy cruft */
                 data_size= len*2;
             }else{
                 is->audio_buf= is->audio_buf1;
             }
 

             /* if no pts, then compute it */
             pts = is->audio_clock;
             *pts_ptr = pts;

             n = 2 * dec->channels;

             is->audio_clock += (double)data_size /

                 (double)(n * dec->sample_rate);

 #ifdef DEBUG

             {
                 static double last_clock;
                 printf("audio: delay=%0.3f clock=%0.3f pts=%0.3f\n",
                        is->audio_clock - last_clock,
                        is->audio_clock, pts);
                 last_clock = is->audio_clock;

             }

 #endif
             return data_size;

         }
 

         /* free the current packet */
         if (pkt->data)

             av_free_packet(pkt);

         if (is->paused || is->audioq.abort_request) {
             return -1;
         }

         /* read next packet */
         if (packet_queue_get(&is->audioq, pkt, 1) < 0)
             return -1;

         if(pkt->data == flush_pkt.data){

             avcodec_flush_buffers(dec);

             continue;
         }
 

         pkt_temp->data = pkt->data;
         pkt_temp->size = pkt->size;

         /* if update the audio clock with the pts */
         if (pkt->pts != AV_NOPTS_VALUE) {

             is->audio_clock = av_q2d(is->audio_st->time_base)*pkt->pts;

         }

     }
 }
 
 /* prepare a new audio buffer */

 static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)

 {
     VideoState *is = opaque;
     int audio_size, len1;
     double pts;
 
     audio_callback_time = av_gettime();

     while (len > 0) {
         if (is->audio_buf_index >= is->audio_buf_size) {

            audio_size = audio_decode_frame(is, &pts);

            if (audio_size < 0) {
                 /* if error, just output silence */

                is->audio_buf = is->audio_buf1;

                is->audio_buf_size = 1024;
                memset(is->audio_buf, 0, is->audio_buf_size);
            } else {

                if (is->show_mode != SHOW_MODE_VIDEO)

                    update_sample_display(is, (int16_t *)is->audio_buf, audio_size);

                audio_size = synchronize_audio(is, (int16_t *)is->audio_buf, audio_size,

                                               pts);
                is->audio_buf_size = audio_size;
            }
            is->audio_buf_index = 0;
         }
         len1 = is->audio_buf_size - is->audio_buf_index;
         if (len1 > len)
             len1 = len;
         memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
         len -= len1;
         stream += len1;
         is->audio_buf_index += len1;
     }
 }
 
 /* open a given stream. Return 0 if OK */
 static int stream_component_open(VideoState *is, int stream_index)
 {
     AVFormatContext *ic = is->ic;

     AVCodecContext *avctx;

     AVCodec *codec;
     SDL_AudioSpec wanted_spec, spec;
 
     if (stream_index < 0 || stream_index >= ic->nb_streams)
         return -1;

     avctx = ic->streams[stream_index]->codec;

     /* prepare audio output */

     if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {

         if (avctx->channels > 0) {
             avctx->request_channels = FFMIN(2, avctx->channels);

         } else {

             avctx->request_channels = 2;

         }

     }
 

     codec = avcodec_find_decoder(avctx->codec_id);

     if (!codec)
         return -1;
 

     avctx->workaround_bugs = workaround_bugs;
     avctx->lowres = lowres;

     if(avctx->lowres > codec->max_lowres){
         av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n",
                 codec->max_lowres);
         avctx->lowres= codec->max_lowres;
     }
     if(avctx->lowres) avctx->flags |= CODEC_FLAG_EMU_EDGE;

     avctx->idct_algo= idct;
     if(fast) avctx->flags2 |= CODEC_FLAG2_FAST;
     avctx->skip_frame= skip_frame;
     avctx->skip_idct= skip_idct;
     avctx->skip_loop_filter= skip_loop_filter;
     avctx->error_recognition= error_recognition;
     avctx->error_concealment= error_concealment;

     avctx->thread_count= thread_count;

     set_context_opts(avctx, avcodec_opts[avctx->codec_type], 0, codec);

     if(codec->capabilities & CODEC_CAP_DR1)
         avctx->flags |= CODEC_FLAG_EMU_EDGE;
 

     if (avcodec_open(avctx, codec) < 0)

         return -1;

 
     /* prepare audio output */

     if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {

         if(avctx->sample_rate <= 0 || avctx->channels <= 0){
             fprintf(stderr, "Invalid sample rate or channel count\n");
             return -1;
         }

         wanted_spec.freq = avctx->sample_rate;

         wanted_spec.format = AUDIO_S16SYS;

         wanted_spec.channels = avctx->channels;

         wanted_spec.silence = 0;
         wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
         wanted_spec.callback = sdl_audio_callback;
         wanted_spec.userdata = is;
         if (SDL_OpenAudio(&wanted_spec, &spec) < 0) {
             fprintf(stderr, "SDL_OpenAudio: %s\n", SDL_GetError());
             return -1;
         }
         is->audio_hw_buf_size = spec.size;

         is->audio_src_fmt= AV_SAMPLE_FMT_S16;

     }
 

     ic->streams[stream_index]->discard = AVDISCARD_DEFAULT;

     switch(avctx->codec_type) {

     case AVMEDIA_TYPE_AUDIO:

         is->audio_stream = stream_index;
         is->audio_st = ic->streams[stream_index];
         is->audio_buf_size = 0;
         is->audio_buf_index = 0;

 
         /* init averaging filter */
         is->audio_diff_avg_coef = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
         is->audio_diff_avg_count = 0;
         /* since we do not have a precise anough audio fifo fullness,
            we correct audio sync only if larger than this threshold */

         is->audio_diff_threshold = 2.0 * SDL_AUDIO_BUFFER_SIZE / avctx->sample_rate;

         memset(&is->audio_pkt, 0, sizeof(is->audio_pkt));
         packet_queue_init(&is->audioq);

         SDL_PauseAudio(0);

         break;

     case AVMEDIA_TYPE_VIDEO:

         is->video_stream = stream_index;
         is->video_st = ic->streams[stream_index];
 
         packet_queue_init(&is->videoq);
         is->video_tid = SDL_CreateThread(video_thread, is);
         break;

     case AVMEDIA_TYPE_SUBTITLE:

         is->subtitle_stream = stream_index;
         is->subtitle_st = ic->streams[stream_index];
         packet_queue_init(&is->subtitleq);

         is->subtitle_tid = SDL_CreateThread(subtitle_thread, is);
         break;

     default:
         break;
     }
     return 0;
 }
 
 static void stream_component_close(VideoState *is, int stream_index)
 {
     AVFormatContext *ic = is->ic;

     AVCodecContext *avctx;

     if (stream_index < 0 || stream_index >= ic->nb_streams)
         return;

     avctx = ic->streams[stream_index]->codec;

     switch(avctx->codec_type) {

     case AVMEDIA_TYPE_AUDIO:

         packet_queue_abort(&is->audioq);
 
         SDL_CloseAudio();
 
         packet_queue_end(&is->audioq);

         if (is->reformat_ctx)
             av_audio_convert_free(is->reformat_ctx);

         is->reformat_ctx = NULL;

         break;

     case AVMEDIA_TYPE_VIDEO:

         packet_queue_abort(&is->videoq);
 
         /* note: we also signal this mutex to make sure we deblock the
            video thread in all cases */
         SDL_LockMutex(is->pictq_mutex);
         SDL_CondSignal(is->pictq_cond);
         SDL_UnlockMutex(is->pictq_mutex);
 
         SDL_WaitThread(is->video_tid, NULL);
 
         packet_queue_end(&is->videoq);
         break;

     case AVMEDIA_TYPE_SUBTITLE:

         packet_queue_abort(&is->subtitleq);

         /* note: we also signal this mutex to make sure we deblock the
            video thread in all cases */
         SDL_LockMutex(is->subpq_mutex);
         is->subtitle_stream_changed = 1;

         SDL_CondSignal(is->subpq_cond);
         SDL_UnlockMutex(is->subpq_mutex);
 
         SDL_WaitThread(is->subtitle_tid, NULL);
 
         packet_queue_end(&is->subtitleq);
         break;

     default:
         break;
     }
 

     ic->streams[stream_index]->discard = AVDISCARD_ALL;

     avcodec_close(avctx);
     switch(avctx->codec_type) {

     case AVMEDIA_TYPE_AUDIO:

         is->audio_st = NULL;
         is->audio_stream = -1;
         break;

     case AVMEDIA_TYPE_VIDEO:

         is->video_st = NULL;
         is->video_stream = -1;
         break;

     case AVMEDIA_TYPE_SUBTITLE:

         is->subtitle_st = NULL;
         is->subtitle_stream = -1;
         break;

     default:
         break;
     }
 }
 

 /* since we have only one decoding thread, we can use a global
    variable instead of a thread local variable */
 static VideoState *global_video_state;
 
 static int decode_interrupt_cb(void)
 {
     return (global_video_state && global_video_state->abort_request);
 }

 
 /* this thread gets the stream from the disk or the network */

 static int read_thread(void *arg)

 {
     VideoState *is = arg;

     AVFormatContext *ic = NULL;

     int err, i, ret;

     int st_index[AVMEDIA_TYPE_NB];

     AVPacket pkt1, *pkt = &pkt1;

     int eof=0;

     int pkt_in_play_range = 0;

     AVDictionaryEntry *t;

     memset(st_index, -1, sizeof(st_index));

     is->video_stream = -1;
     is->audio_stream = -1;

     is->subtitle_stream = -1;

     global_video_state = is;

     avio_set_interrupt_cb(decode_interrupt_cb);

     err = avformat_open_input(&ic, is->filename, is->iformat, &format_opts);

     if (err < 0) {
         print_error(is->filename, err);
         ret = -1;
         goto fail;
     }

     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
         ret = AVERROR_OPTION_NOT_FOUND;
         goto fail;
     }

     is->ic = ic;

 
     if(genpts)
         ic->flags |= AVFMT_FLAG_GENPTS;
 

     err = av_find_stream_info(ic);
     if (err < 0) {
         fprintf(stderr, "%s: could not find codec parameters\n", is->filename);
         ret = -1;
         goto fail;
     }

     if(ic->pb)
         ic->pb->eof_reached= 0; //FIXME hack, ffplay maybe should not use url_feof() to test for the end

     if(seek_by_bytes<0)
         seek_by_bytes= !!(ic->iformat->flags & AVFMT_TS_DISCONT);
 

     /* if seeking requested, we execute it */
     if (start_time != AV_NOPTS_VALUE) {
         int64_t timestamp;
 
         timestamp = start_time;
         /* add the stream start time */
         if (ic->start_time != AV_NOPTS_VALUE)
             timestamp += ic->start_time;

         ret = avformat_seek_file(ic, -1, INT64_MIN, timestamp, INT64_MAX, 0);

         if (ret < 0) {

             fprintf(stderr, "%s: could not seek to position %0.3f\n",

                     is->filename, (double)timestamp / AV_TIME_BASE);
         }
     }
 

     for (i = 0; i < ic->nb_streams; i++)

         ic->streams[i]->discard = AVDISCARD_ALL;

     if (!video_disable)

         st_index[AVMEDIA_TYPE_VIDEO] =
             av_find_best_stream(ic, AVMEDIA_TYPE_VIDEO,
                                 wanted_stream[AVMEDIA_TYPE_VIDEO], -1, NULL, 0);

     if (!audio_disable)

         st_index[AVMEDIA_TYPE_AUDIO] =
             av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO,
                                 wanted_stream[AVMEDIA_TYPE_AUDIO],
                                 st_index[AVMEDIA_TYPE_VIDEO],
                                 NULL, 0);

     if (!video_disable)

         st_index[AVMEDIA_TYPE_SUBTITLE] =
             av_find_best_stream(ic, AVMEDIA_TYPE_SUBTITLE,
                                 wanted_stream[AVMEDIA_TYPE_SUBTITLE],
                                 (st_index[AVMEDIA_TYPE_AUDIO] >= 0 ?
                                  st_index[AVMEDIA_TYPE_AUDIO] :
                                  st_index[AVMEDIA_TYPE_VIDEO]),
                                 NULL, 0);

     if (show_status) {

         av_dump_format(ic, 0, is->filename, 0);

     }
 

     is->show_mode = show_mode;
 

     /* open the streams */

     if (st_index[AVMEDIA_TYPE_AUDIO] >= 0) {
         stream_component_open(is, st_index[AVMEDIA_TYPE_AUDIO]);

     }
 

     ret=-1;

     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
         ret= stream_component_open(is, st_index[AVMEDIA_TYPE_VIDEO]);

     }

     is->refresh_tid = SDL_CreateThread(refresh_thread, is);

     if (is->show_mode == SHOW_MODE_NONE)
         is->show_mode = ret >= 0 ? SHOW_MODE_VIDEO : SHOW_MODE_RDFT;

     if (st_index[AVMEDIA_TYPE_SUBTITLE] >= 0) {
         stream_component_open(is, st_index[AVMEDIA_TYPE_SUBTITLE]);

     }
 

     if (is->video_stream < 0 && is->audio_stream < 0) {

         fprintf(stderr, "%s: could not open codecs\n", is->filename);
         ret = -1;

         goto fail;
     }
 
     for(;;) {
         if (is->abort_request)
             break;

         if (is->paused != is->last_paused) {
             is->last_paused = is->paused;

             if (is->paused)

                 is->read_pause_return= av_read_pause(ic);

             else
                 av_read_play(ic);

         }

 #if CONFIG_RTSP_DEMUXER
         if (is->paused && !strcmp(ic->iformat->name, "rtsp")) {

             /* wait 10 ms to avoid trying to get another packet */
             /* XXX: horrible */
             SDL_Delay(10);
             continue;
         }

 #endif

         if (is->seek_req) {

             int64_t seek_target= is->seek_pos;

             int64_t seek_min= is->seek_rel > 0 ? seek_target - is->seek_rel + 2: INT64_MIN;
             int64_t seek_max= is->seek_rel < 0 ? seek_target - is->seek_rel - 2: INT64_MAX;
 //FIXME the +-2 is due to rounding being not done in the correct direction in generation
 //      of the seek_pos/seek_rel variables

             ret = avformat_seek_file(is->ic, -1, seek_min, seek_target, seek_max, is->seek_flags);

             if (ret < 0) {
                 fprintf(stderr, "%s: error while seeking\n", is->ic->filename);

             }else{
                 if (is->audio_stream >= 0) {
                     packet_queue_flush(&is->audioq);

                     packet_queue_put(&is->audioq, &flush_pkt);

                 }

                 if (is->subtitle_stream >= 0) {
                     packet_queue_flush(&is->subtitleq);

                     packet_queue_put(&is->subtitleq, &flush_pkt);

                 }

                 if (is->video_stream >= 0) {
                     packet_queue_flush(&is->videoq);

                     packet_queue_put(&is->videoq, &flush_pkt);

                 }

             }
             is->seek_req = 0;

             eof= 0;

         }

         /* if the queue are full, no need to read more */

         if (   is->audioq.size + is->videoq.size + is->subtitleq.size > MAX_QUEUE_SIZE
             || (   (is->audioq   .size  > MIN_AUDIOQ_SIZE || is->audio_stream<0)
                 && (is->videoq   .nb_packets > MIN_FRAMES || is->video_stream<0)
                 && (is->subtitleq.nb_packets > MIN_FRAMES || is->subtitle_stream<0))) {

             /* wait 10 ms */
             SDL_Delay(10);
             continue;
         }

         if(eof) {

             if(is->video_stream >= 0){

                 av_init_packet(pkt);
                 pkt->data=NULL;
                 pkt->size=0;
                 pkt->stream_index= is->video_stream;
                 packet_queue_put(&is->videoq, pkt);

             }

             SDL_Delay(10);

             if(is->audioq.size + is->videoq.size + is->subtitleq.size ==0){
                 if(loop!=1 && (!loop || --loop)){
                     stream_seek(cur_stream, start_time != AV_NOPTS_VALUE ? start_time : 0, 0, 0);
                 }else if(autoexit){
                     ret=AVERROR_EOF;
                     goto fail;
                 }

             }

             eof=0;

             continue;
         }

         ret = av_read_frame(ic, pkt);

         if (ret < 0) {

             if (ret == AVERROR_EOF || url_feof(ic->pb))

                 eof=1;

             if (ic->pb && ic->pb->error)

                 break;

             SDL_Delay(100); /* wait for user event */
             continue;

         }

         /* check if packet is in play range specified by user, then queue, otherwise discard */
         pkt_in_play_range = duration == AV_NOPTS_VALUE ||
                 (pkt->pts - ic->streams[pkt->stream_index]->start_time) *
                 av_q2d(ic->streams[pkt->stream_index]->time_base) -
                 (double)(start_time != AV_NOPTS_VALUE ? start_time : 0)/1000000
                 <= ((double)duration/1000000);
         if (pkt->stream_index == is->audio_stream && pkt_in_play_range) {

             packet_queue_put(&is->audioq, pkt);

         } else if (pkt->stream_index == is->video_stream && pkt_in_play_range) {

             packet_queue_put(&is->videoq, pkt);

         } else if (pkt->stream_index == is->subtitle_stream && pkt_in_play_range) {

             packet_queue_put(&is->subtitleq, pkt);

         } else {
             av_free_packet(pkt);
         }
     }
     /* wait until the end */
     while (!is->abort_request) {
         SDL_Delay(100);
     }
 

     ret = 0;

  fail:

     /* disable interrupting */
     global_video_state = NULL;
 

     /* close each stream */
     if (is->audio_stream >= 0)
         stream_component_close(is, is->audio_stream);
     if (is->video_stream >= 0)
         stream_component_close(is, is->video_stream);

     if (is->subtitle_stream >= 0)
         stream_component_close(is, is->subtitle_stream);

     if (is->ic) {
         av_close_input_file(is->ic);
         is->ic = NULL; /* safety */
     }

     avio_set_interrupt_cb(NULL);

     if (ret != 0) {
         SDL_Event event;

         event.type = FF_QUIT_EVENT;
         event.user.data1 = is;
         SDL_PushEvent(&event);
     }

     return 0;
 }
 

 static VideoState *stream_open(const char *filename, AVInputFormat *iformat)

 {
     VideoState *is;
 
     is = av_mallocz(sizeof(VideoState));
     if (!is)
         return NULL;

     av_strlcpy(is->filename, filename, sizeof(is->filename));

     is->iformat = iformat;

     is->ytop = 0;
     is->xleft = 0;
 
     /* start video display */
     is->pictq_mutex = SDL_CreateMutex();
     is->pictq_cond = SDL_CreateCond();

     is->subpq_mutex = SDL_CreateMutex();
     is->subpq_cond = SDL_CreateCond();

     is->av_sync_type = av_sync_type;

     is->read_tid = SDL_CreateThread(read_thread, is);
     if (!is->read_tid) {

         av_free(is);
         return NULL;
     }
     return is;
 }
 

 static void stream_cycle_channel(VideoState *is, int codec_type)

 {
     AVFormatContext *ic = is->ic;
     int start_index, stream_index;
     AVStream *st;
 

     if (codec_type == AVMEDIA_TYPE_VIDEO)

         start_index = is->video_stream;

     else if (codec_type == AVMEDIA_TYPE_AUDIO)

         start_index = is->audio_stream;

     else
         start_index = is->subtitle_stream;

     if (start_index < (codec_type == AVMEDIA_TYPE_SUBTITLE ? -1 : 0))

         return;
     stream_index = start_index;
     for(;;) {
         if (++stream_index >= is->ic->nb_streams)

         {

             if (codec_type == AVMEDIA_TYPE_SUBTITLE)

             {
                 stream_index = -1;
                 goto the_end;
             } else
                 stream_index = 0;
         }

         if (stream_index == start_index)
             return;
         st = ic->streams[stream_index];

         if (st->codec->codec_type == codec_type) {

             /* check that parameters are OK */
             switch(codec_type) {

             case AVMEDIA_TYPE_AUDIO:

                 if (st->codec->sample_rate != 0 &&
                     st->codec->channels != 0)

                     goto the_end;
                 break;

             case AVMEDIA_TYPE_VIDEO:
             case AVMEDIA_TYPE_SUBTITLE:

                 goto the_end;
             default:
                 break;
             }
         }
     }
  the_end:
     stream_component_close(is, start_index);
     stream_component_open(is, stream_index);
 }
 
 

 static void toggle_full_screen(void)

 {
     is_full_screen = !is_full_screen;

     video_open(cur_stream);

 }
 

 static void toggle_pause(void)

 {
     if (cur_stream)

         stream_toggle_pause(cur_stream);

     step = 0;
 }
 

 static void step_to_next_frame(void)

 {
     if (cur_stream) {

         /* if the stream is paused unpause it, then step */

         if (cur_stream->paused)

             stream_toggle_pause(cur_stream);

     }
     step = 1;

 }
 

 static void toggle_audio_display(void)

 {
     if (cur_stream) {

         int bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);

         cur_stream->show_mode = (cur_stream->show_mode + 1) % SHOW_MODE_NB;

         fill_rectangle(screen,
                     cur_stream->xleft, cur_stream->ytop, cur_stream->width, cur_stream->height,
                     bgcolor);
         SDL_UpdateRect(screen, cur_stream->xleft, cur_stream->ytop, cur_stream->width, cur_stream->height);

     }
 }
 
 /* handle an event sent by the GUI */

 static void event_loop(void)

 {
     SDL_Event event;

     double incr, pos, frac;

 
     for(;;) {

         double x;

         SDL_WaitEvent(&event);
         switch(event.type) {
         case SDL_KEYDOWN:

             if (exit_on_keydown) {
                 do_exit();
                 break;
             }

             switch(event.key.keysym.sym) {
             case SDLK_ESCAPE:
             case SDLK_q:
                 do_exit();
                 break;
             case SDLK_f:
                 toggle_full_screen();
                 break;
             case SDLK_p:
             case SDLK_SPACE:
                 toggle_pause();
                 break;

             case SDLK_s: //S: Step to next frame
                 step_to_next_frame();
                 break;

             case SDLK_a:

                 if (cur_stream)

                     stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);

                 break;
             case SDLK_v:

                 if (cur_stream)

                     stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);

                 break;

             case SDLK_t:

                 if (cur_stream)

                     stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);

                 break;

             case SDLK_w:

                 toggle_audio_display();
                 break;

             case SDLK_LEFT:
                 incr = -10.0;
                 goto do_seek;
             case SDLK_RIGHT:
                 incr = 10.0;
                 goto do_seek;
             case SDLK_UP:
                 incr = 60.0;
                 goto do_seek;
             case SDLK_DOWN:
                 incr = -60.0;
             do_seek:
                 if (cur_stream) {

                     if (seek_by_bytes) {

                         if (cur_stream->video_stream >= 0 && cur_stream->video_current_pos>=0){
                             pos= cur_stream->video_current_pos;
                         }else if(cur_stream->audio_stream >= 0 && cur_stream->audio_pkt.pos>=0){
                             pos= cur_stream->audio_pkt.pos;
                         }else

                             pos = avio_tell(cur_stream->ic->pb);

                         if (cur_stream->ic->bit_rate)

                             incr *= cur_stream->ic->bit_rate / 8.0;

                         else
                             incr *= 180000.0;
                         pos += incr;

                         stream_seek(cur_stream, pos, incr, 1);

                     } else {
                         pos = get_master_clock(cur_stream);
                         pos += incr;

                         stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), (int64_t)(incr * AV_TIME_BASE), 0);

                     }

                 }
                 break;

             default:
                 break;
             }
             break;

         case SDL_MOUSEBUTTONDOWN:

             if (exit_on_mousedown) {
                 do_exit();
                 break;
             }

         case SDL_MOUSEMOTION:
             if(event.type ==SDL_MOUSEBUTTONDOWN){
                 x= event.button.x;
             }else{
                 if(event.motion.state != SDL_PRESSED)
                     break;
                 x= event.motion.x;
             }

             if (cur_stream) {

                 if(seek_by_bytes || cur_stream->ic->duration<=0){

                     uint64_t size=  avio_size(cur_stream->ic->pb);

                     stream_seek(cur_stream, size*x/cur_stream->width, 0, 1);

                 }else{

                     int64_t ts;
                     int ns, hh, mm, ss;
                     int tns, thh, tmm, tss;
                     tns = cur_stream->ic->duration/1000000LL;
                     thh = tns/3600;
                     tmm = (tns%3600)/60;
                     tss = (tns%60);

                     frac = x/cur_stream->width;

                     ns = frac*tns;
                     hh = ns/3600;
                     mm = (ns%3600)/60;
                     ss = (ns%60);
                     fprintf(stderr, "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d)       \n", frac*100,
                             hh, mm, ss, thh, tmm, tss);
                     ts = frac*cur_stream->ic->duration;
                     if (cur_stream->ic->start_time != AV_NOPTS_VALUE)
                         ts += cur_stream->ic->start_time;
                     stream_seek(cur_stream, ts, 0, 0);

                 }

             }
             break;

         case SDL_VIDEORESIZE:
             if (cur_stream) {

                 screen = SDL_SetVideoMode(event.resize.w, event.resize.h, 0,

                                           SDL_HWSURFACE|SDL_RESIZABLE|SDL_ASYNCBLIT|SDL_HWACCEL);

                 screen_width = cur_stream->width = event.resize.w;
                 screen_height= cur_stream->height= event.resize.h;

             }
             break;
         case SDL_QUIT:

         case FF_QUIT_EVENT:

             do_exit();
             break;
         case FF_ALLOC_EVENT:

             video_open(event.user.data1);

             alloc_picture(event.user.data1);
             break;
         case FF_REFRESH_EVENT:

             video_refresh(event.user.data1);

             cur_stream->refresh=0;

             break;
         default:
             break;
         }
     }
 }
 

 static int opt_frame_size(const char *opt, const char *arg)

 {

     if (av_parse_video_size(&frame_width, &frame_height, arg) < 0) {

         fprintf(stderr, "Incorrect frame size\n");

         return AVERROR(EINVAL);

     }
     if ((frame_width % 2) != 0 || (frame_height % 2) != 0) {
         fprintf(stderr, "Frame size must be a multiple of 2\n");

         return AVERROR(EINVAL);

     }

     return 0;

 }
 

 static int opt_width(const char *opt, const char *arg)

 {

     screen_width = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
     return 0;

 }
 

 static int opt_height(const char *opt, const char *arg)

 {

     screen_height = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
     return 0;

 }
 

 static int opt_format(const char *opt, const char *arg)

 {
     file_iformat = av_find_input_format(arg);
     if (!file_iformat) {
         fprintf(stderr, "Unknown input format: %s\n", arg);

         return AVERROR(EINVAL);

     }

     return 0;

 }

 static int opt_frame_pix_fmt(const char *opt, const char *arg)

 {

     frame_pix_fmt = av_get_pix_fmt(arg);

     return 0;

 }
 

 static int opt_sync(const char *opt, const char *arg)

 {
     if (!strcmp(arg, "audio"))
         av_sync_type = AV_SYNC_AUDIO_MASTER;
     else if (!strcmp(arg, "video"))
         av_sync_type = AV_SYNC_VIDEO_MASTER;
     else if (!strcmp(arg, "ext"))
         av_sync_type = AV_SYNC_EXTERNAL_CLOCK;

     else {

         fprintf(stderr, "Unknown value for %s: %s\n", opt, arg);

         exit(1);
     }

     return 0;

 }
 

 static int opt_seek(const char *opt, const char *arg)

 {

     start_time = parse_time_or_die(opt, arg, 1);
     return 0;

 }
 

 static int opt_duration(const char *opt, const char *arg)
 {
     duration = parse_time_or_die(opt, arg, 1);
     return 0;
 }
 

 static int opt_thread_count(const char *opt, const char *arg)

 {

     thread_count= parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);

 #if !HAVE_THREADS

     fprintf(stderr, "Warning: not compiled with thread support, using thread emulation\n");
 #endif

     return 0;

 }

 static int opt_show_mode(const char *opt, const char *arg)
 {
     show_mode = !strcmp(arg, "video") ? SHOW_MODE_VIDEO :
                 !strcmp(arg, "waves") ? SHOW_MODE_WAVES :
                 !strcmp(arg, "rdft" ) ? SHOW_MODE_RDFT  :
                 parse_number_or_die(opt, arg, OPT_INT, 0, SHOW_MODE_NB-1);
     return 0;
 }
 

 static int opt_input_file(const char *opt, const char *filename)
 {
     if (input_filename) {
         fprintf(stderr, "Argument '%s' provided as input filename, but '%s' was already specified.\n",
                 filename, input_filename);
         exit(1);
     }
     if (!strcmp(filename, "-"))
         filename = "pipe:";
     input_filename = filename;
     return 0;
 }
 

 static const OptionDef options[] = {

 #include "cmdutils_common_opts.h"

     { "x", HAS_ARG, {(void*)opt_width}, "force displayed width", "width" },
     { "y", HAS_ARG, {(void*)opt_height}, "force displayed height", "height" },

     { "s", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_size}, "set frame size (WxH or abbreviation)", "size" },

     { "fs", OPT_BOOL, {(void*)&is_full_screen}, "force full screen" },

     { "an", OPT_BOOL, {(void*)&audio_disable}, "disable audio" },
     { "vn", OPT_BOOL, {(void*)&video_disable}, "disable video" },

     { "ast", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&wanted_stream[AVMEDIA_TYPE_AUDIO]}, "select desired audio stream", "stream_number" },
     { "vst", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&wanted_stream[AVMEDIA_TYPE_VIDEO]}, "select desired video stream", "stream_number" },
     { "sst", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&wanted_stream[AVMEDIA_TYPE_SUBTITLE]}, "select desired subtitle stream", "stream_number" },

     { "ss", HAS_ARG, {(void*)&opt_seek}, "seek to a given position in seconds", "pos" },
     { "t", HAS_ARG, {(void*)&opt_duration}, "play  \"duration\" seconds of audio/video", "duration" },

     { "bytes", OPT_INT | HAS_ARG, {(void*)&seek_by_bytes}, "seek by bytes 0=off 1=on -1=auto", "val" },

     { "nodisp", OPT_BOOL, {(void*)&display_disable}, "disable graphical display" },
     { "f", HAS_ARG, {(void*)opt_format}, "force format", "fmt" },

     { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_frame_pix_fmt}, "set pixel format", "format" },

     { "stats", OPT_BOOL | OPT_EXPERT, {(void*)&show_status}, "show status", "" },

     { "bug", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&workaround_bugs}, "workaround bugs", "" },

     { "fast", OPT_BOOL | OPT_EXPERT, {(void*)&fast}, "non spec compliant optimizations", "" },

     { "genpts", OPT_BOOL | OPT_EXPERT, {(void*)&genpts}, "generate pts", "" },

     { "drp", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&decoder_reorder_pts}, "let decoder reorder pts 0=off 1=on -1=auto", ""},

     { "lowres", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&lowres}, "", "" },

     { "skiploop", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&skip_loop_filter}, "", "" },
     { "skipframe", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&skip_frame}, "", "" },
     { "skipidct", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&skip_idct}, "", "" },

     { "idct", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&idct}, "set idct algo",  "algo" },

     { "er", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&error_recognition}, "set error detection threshold (0-4)",  "threshold" },

     { "ec", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&error_concealment}, "set error concealment options",  "bit_mask" },

     { "sync", HAS_ARG | OPT_EXPERT, {(void*)opt_sync}, "set audio-video sync. type (type=audio/video/ext)", "type" },
     { "threads", HAS_ARG | OPT_EXPERT, {(void*)opt_thread_count}, "thread count", "count" },

     { "autoexit", OPT_BOOL | OPT_EXPERT, {(void*)&autoexit}, "exit at the end", "" },

     { "exitonkeydown", OPT_BOOL | OPT_EXPERT, {(void*)&exit_on_keydown}, "exit on key down", "" },
     { "exitonmousedown", OPT_BOOL | OPT_EXPERT, {(void*)&exit_on_mousedown}, "exit on mouse down", "" },

     { "loop", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&loop}, "set number of times the playback shall be looped", "loop count" },

     { "framedrop", OPT_BOOL | OPT_EXPERT, {(void*)&framedrop}, "drop frames when cpu is too slow", "" },

     { "window_title", OPT_STRING | HAS_ARG, {(void*)&window_title}, "set window title", "window title" },

 #if CONFIG_AVFILTER

     { "vf", OPT_STRING | HAS_ARG, {(void*)&vfilters}, "video filters", "filter list" },

 #endif

     { "rdftspeed", OPT_INT | HAS_ARG| OPT_AUDIO | OPT_EXPERT, {(void*)&rdftspeed}, "rdft speed", "msecs" },

     { "showmode", HAS_ARG, {(void*)opt_show_mode}, "select show mode (0 = video, 1 = waves, 2 = RDFT)", "mode" },
     { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, {(void*)opt_default}, "generic catch all option", "" },

     { "i", HAS_ARG, {(void *)opt_input_file}, "read specified file", "input_file"},

     { NULL, },
 };
 

 static void show_usage(void)

 {

     printf("Simple media player\n");
     printf("usage: ffplay [options] input_file\n");

     printf("\n");

 }
 

 static int opt_help(const char *opt, const char *arg)

 {

     av_log_set_callback(log_callback_help);

     show_usage();

     show_help_options(options, "Main options:\n",
                       OPT_EXPERT, 0);
     show_help_options(options, "\nAdvanced options:\n",
                       OPT_EXPERT, OPT_EXPERT);

     printf("\n");
     av_opt_show2(avcodec_opts[0], NULL,
                  AV_OPT_FLAG_DECODING_PARAM, 0);
     printf("\n");
     av_opt_show2(avformat_opts, NULL,
                  AV_OPT_FLAG_DECODING_PARAM, 0);
 #if !CONFIG_AVFILTER
     printf("\n");
     av_opt_show2(sws_opts, NULL,
                  AV_OPT_FLAG_ENCODING_PARAM, 0);
 #endif

     printf("\nWhile playing:\n"
            "q, ESC              quit\n"
            "f                   toggle full screen\n"
            "p, SPC              pause\n"

            "a                   cycle audio channel\n"
            "v                   cycle video channel\n"

            "t                   cycle subtitle channel\n"

            "w                   show audio waves\n"

            "s                   activate frame-step mode\n"

            "left/right          seek backward/forward 10 seconds\n"
            "down/up             seek backward/forward 1 minute\n"

            "mouse click         seek to percentage in file corresponding to fraction of width\n"

            );

     return 0;

 }
 
 /* Called from the main */
 int main(int argc, char **argv)
 {

     int flags;

     av_log_set_flags(AV_LOG_SKIP_REPEATED);
 

     /* register all codecs, demux and protocols */

     avcodec_register_all();

 #if CONFIG_AVDEVICE

     avdevice_register_all();

 #endif

 #if CONFIG_AVFILTER
     avfilter_register_all();
 #endif

     av_register_all();
 

     init_opts();

     show_banner();

     parse_options(argc, argv, options, opt_input_file);

     if (!input_filename) {

         show_usage();

         fprintf(stderr, "An input file must be specified\n");

         fprintf(stderr, "Use -h to get full help or, even better, run 'man ffplay'\n");

         exit(1);
     }

 
     if (display_disable) {
         video_disable = 1;
     }

     flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;

     if (audio_disable)
         flags &= ~SDL_INIT_AUDIO;

 #if !defined(__MINGW32__) && !defined(__APPLE__)
     flags |= SDL_INIT_EVENTTHREAD; /* Not supported on Windows or Mac OS X */

 #endif

     if (SDL_Init (flags)) {

         fprintf(stderr, "Could not initialize SDL - %s\n", SDL_GetError());

         exit(1);
     }
 
     if (!display_disable) {

 #if HAVE_SDL_VIDEO_SIZE

         const SDL_VideoInfo *vi = SDL_GetVideoInfo();
         fs_screen_width = vi->current_w;
         fs_screen_height = vi->current_h;

 #endif

     }
 
     SDL_EventState(SDL_ACTIVEEVENT, SDL_IGNORE);
     SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE);
     SDL_EventState(SDL_USEREVENT, SDL_IGNORE);
 

     av_init_packet(&flush_pkt);
     flush_pkt.data= "FLUSH";
 

     cur_stream = stream_open(input_filename, file_iformat);

 
     event_loop();
 
     /* never returns */
 
     return 0;
 }