/*

  * 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 "channel_layout.h"

 #include "avassert.h"

 #include "buffer.h"
 #include "common.h"

 #include "dict.h"

 #include "frame.h"
 #include "imgutils.h"
 #include "mem.h"
 #include "samplefmt.h"
 

 
 static AVFrameSideData *frame_new_side_data(AVFrame *frame,
                                             enum AVFrameSideDataType type,
                                             AVBufferRef *buf);
 

 #if FF_API_FRAME_GET_SET

 MAKE_ACCESSORS(AVFrame, frame, int64_t, best_effort_timestamp)
 MAKE_ACCESSORS(AVFrame, frame, int64_t, pkt_duration)
 MAKE_ACCESSORS(AVFrame, frame, int64_t, pkt_pos)
 MAKE_ACCESSORS(AVFrame, frame, int64_t, channel_layout)
 MAKE_ACCESSORS(AVFrame, frame, int,     channels)
 MAKE_ACCESSORS(AVFrame, frame, int,     sample_rate)
 MAKE_ACCESSORS(AVFrame, frame, AVDictionary *, metadata)
 MAKE_ACCESSORS(AVFrame, frame, int,     decode_error_flags)
 MAKE_ACCESSORS(AVFrame, frame, int,     pkt_size)

 MAKE_ACCESSORS(AVFrame, frame, enum AVColorSpace, colorspace)
 MAKE_ACCESSORS(AVFrame, frame, enum AVColorRange, color_range)

 #endif

 #define CHECK_CHANNELS_CONSISTENCY(frame) \
     av_assert2(!(frame)->channel_layout || \
                (frame)->channels == \
                av_get_channel_layout_nb_channels((frame)->channel_layout))
 

 #if FF_API_FRAME_QP

 int av_frame_set_qp_table(AVFrame *f, AVBufferRef *buf, int stride, int qp_type)
 {
     av_buffer_unref(&f->qp_table_buf);
 
     f->qp_table_buf = buf;
 

 FF_DISABLE_DEPRECATION_WARNINGS

     f->qscale_table = buf->data;
     f->qstride      = stride;
     f->qscale_type  = qp_type;

 FF_ENABLE_DEPRECATION_WARNINGS

 
     return 0;
 }
 
 int8_t *av_frame_get_qp_table(AVFrame *f, int *stride, int *type)
 {

 FF_DISABLE_DEPRECATION_WARNINGS

     *stride = f->qstride;
     *type   = f->qscale_type;

 FF_ENABLE_DEPRECATION_WARNINGS

 
     if (!f->qp_table_buf)
         return NULL;
 
     return f->qp_table_buf->data;
 }

 #endif

 const char *av_get_colorspace_name(enum AVColorSpace val)
 {

     static const char * const name[] = {

         [AVCOL_SPC_RGB]       = "GBR",
         [AVCOL_SPC_BT709]     = "bt709",
         [AVCOL_SPC_FCC]       = "fcc",
         [AVCOL_SPC_BT470BG]   = "bt470bg",
         [AVCOL_SPC_SMPTE170M] = "smpte170m",
         [AVCOL_SPC_SMPTE240M] = "smpte240m",
         [AVCOL_SPC_YCOCG]     = "YCgCo",
     };

     if ((unsigned)val >= FF_ARRAY_ELEMS(name))

         return NULL;
     return name[val];
 }
 

 static void get_frame_defaults(AVFrame *frame)
 {
     if (frame->extended_data != frame->data)
         av_freep(&frame->extended_data);
 
     memset(frame, 0, sizeof(*frame));
 

     frame->pts                   =

     frame->pkt_dts               = AV_NOPTS_VALUE;
 #if FF_API_PKT_PTS
 FF_DISABLE_DEPRECATION_WARNINGS

     frame->pkt_pts               = AV_NOPTS_VALUE;

 FF_ENABLE_DEPRECATION_WARNINGS
 #endif

     frame->best_effort_timestamp = AV_NOPTS_VALUE;
     frame->pkt_duration        = 0;
     frame->pkt_pos             = -1;
     frame->pkt_size            = -1;

     frame->key_frame           = 1;
     frame->sample_aspect_ratio = (AVRational){ 0, 1 };
     frame->format              = -1; /* unknown */
     frame->extended_data       = frame->data;

     frame->color_primaries     = AVCOL_PRI_UNSPECIFIED;
     frame->color_trc           = AVCOL_TRC_UNSPECIFIED;
     frame->colorspace          = AVCOL_SPC_UNSPECIFIED;
     frame->color_range         = AVCOL_RANGE_UNSPECIFIED;
     frame->chroma_location     = AVCHROMA_LOC_UNSPECIFIED;

     frame->flags               = 0;

 }
 

 static void free_side_data(AVFrameSideData **ptr_sd)
 {
     AVFrameSideData *sd = *ptr_sd;
 

     av_buffer_unref(&sd->buf);

     av_dict_free(&sd->metadata);
     av_freep(ptr_sd);
 }
 

 static void wipe_side_data(AVFrame *frame)
 {
     int i;
 
     for (i = 0; i < frame->nb_side_data; i++) {
         free_side_data(&frame->side_data[i]);
     }
     frame->nb_side_data = 0;
 
     av_freep(&frame->side_data);
 }
 

 AVFrame *av_frame_alloc(void)
 {
     AVFrame *frame = av_mallocz(sizeof(*frame));
 
     if (!frame)
         return NULL;
 

     frame->extended_data = NULL;

     get_frame_defaults(frame);
 
     return frame;
 }
 
 void av_frame_free(AVFrame **frame)
 {
     if (!frame || !*frame)
         return;
 
     av_frame_unref(*frame);
     av_freep(frame);
 }
 
 static int get_video_buffer(AVFrame *frame, int align)
 {
     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
     int ret, i;
 
     if (!desc)
         return AVERROR(EINVAL);
 
     if ((ret = av_image_check_size(frame->width, frame->height, 0, NULL)) < 0)
         return ret;
 
     if (!frame->linesize[0]) {

         if (align <= 0)

             align = 32; /* STRIDE_ALIGN. Should be av_cpu_max_align() */
 

         for(i=1; i<=align; i+=i) {
             ret = av_image_fill_linesizes(frame->linesize, frame->format,
                                           FFALIGN(frame->width, i));
             if (ret < 0)
                 return ret;
             if (!(frame->linesize[0] & (align-1)))
                 break;
         }

 
         for (i = 0; i < 4 && frame->linesize[i]; i++)
             frame->linesize[i] = FFALIGN(frame->linesize[i], align);
     }
 
     for (i = 0; i < 4 && frame->linesize[i]; i++) {

         int h = FFALIGN(frame->height, 32);

         if (i == 1 || i == 2)

             h = AV_CEIL_RSHIFT(h, desc->log2_chroma_h);

         frame->buf[i] = av_buffer_alloc(frame->linesize[i] * h + 16 + 16/*STRIDE_ALIGN*/ - 1);

         if (!frame->buf[i])
             goto fail;
 
         frame->data[i] = frame->buf[i]->data;
     }

     if (desc->flags & AV_PIX_FMT_FLAG_PAL || desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) {

         av_buffer_unref(&frame->buf[1]);

         frame->buf[1] = av_buffer_alloc(AVPALETTE_SIZE);

         if (!frame->buf[1])
             goto fail;
         frame->data[1] = frame->buf[1]->data;
     }
 
     frame->extended_data = frame->data;
 
     return 0;
 fail:
     av_frame_unref(frame);
     return AVERROR(ENOMEM);
 }
 
 static int get_audio_buffer(AVFrame *frame, int align)
 {

     int channels;

     int planar   = av_sample_fmt_is_planar(frame->format);

     int planes;

     int ret, i;
 

     if (!frame->channels)
         frame->channels = av_get_channel_layout_nb_channels(frame->channel_layout);
 
     channels = frame->channels;
     planes = planar ? channels : 1;
 

     CHECK_CHANNELS_CONSISTENCY(frame);

     if (!frame->linesize[0]) {
         ret = av_samples_get_buffer_size(&frame->linesize[0], channels,
                                          frame->nb_samples, frame->format,
                                          align);
         if (ret < 0)
             return ret;
     }
 
     if (planes > AV_NUM_DATA_POINTERS) {

         frame->extended_data = av_mallocz_array(planes,

                                           sizeof(*frame->extended_data));

         frame->extended_buf  = av_mallocz_array((planes - AV_NUM_DATA_POINTERS),

                                           sizeof(*frame->extended_buf));
         if (!frame->extended_data || !frame->extended_buf) {
             av_freep(&frame->extended_data);
             av_freep(&frame->extended_buf);
             return AVERROR(ENOMEM);
         }
         frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
     } else
         frame->extended_data = frame->data;
 
     for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
         frame->buf[i] = av_buffer_alloc(frame->linesize[0]);
         if (!frame->buf[i]) {
             av_frame_unref(frame);
             return AVERROR(ENOMEM);
         }
         frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
     }
     for (i = 0; i < planes - AV_NUM_DATA_POINTERS; i++) {
         frame->extended_buf[i] = av_buffer_alloc(frame->linesize[0]);
         if (!frame->extended_buf[i]) {
             av_frame_unref(frame);
             return AVERROR(ENOMEM);
         }
         frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
     }
     return 0;
 
 }
 
 int av_frame_get_buffer(AVFrame *frame, int align)
 {
     if (frame->format < 0)
         return AVERROR(EINVAL);
 
     if (frame->width > 0 && frame->height > 0)
         return get_video_buffer(frame, align);

     else if (frame->nb_samples > 0 && (frame->channel_layout || frame->channels > 0))

         return get_audio_buffer(frame, align);
 
     return AVERROR(EINVAL);
 }
 

 static int frame_copy_props(AVFrame *dst, const AVFrame *src, int force_copy)

 {
     int i;
 
     dst->key_frame              = src->key_frame;
     dst->pict_type              = src->pict_type;
     dst->sample_aspect_ratio    = src->sample_aspect_ratio;

     dst->crop_top               = src->crop_top;
     dst->crop_bottom            = src->crop_bottom;
     dst->crop_left              = src->crop_left;
     dst->crop_right             = src->crop_right;

     dst->pts                    = src->pts;
     dst->repeat_pict            = src->repeat_pict;
     dst->interlaced_frame       = src->interlaced_frame;
     dst->top_field_first        = src->top_field_first;
     dst->palette_has_changed    = src->palette_has_changed;
     dst->sample_rate            = src->sample_rate;
     dst->opaque                 = src->opaque;

 #if FF_API_PKT_PTS
 FF_DISABLE_DEPRECATION_WARNINGS

     dst->pkt_pts                = src->pkt_pts;

 FF_ENABLE_DEPRECATION_WARNINGS
 #endif

     dst->pkt_dts                = src->pkt_dts;
     dst->pkt_pos                = src->pkt_pos;
     dst->pkt_size               = src->pkt_size;
     dst->pkt_duration           = src->pkt_duration;
     dst->reordered_opaque       = src->reordered_opaque;
     dst->quality                = src->quality;
     dst->best_effort_timestamp  = src->best_effort_timestamp;
     dst->coded_picture_number   = src->coded_picture_number;
     dst->display_picture_number = src->display_picture_number;
     dst->flags                  = src->flags;
     dst->decode_error_flags     = src->decode_error_flags;
     dst->color_primaries        = src->color_primaries;
     dst->color_trc              = src->color_trc;
     dst->colorspace             = src->colorspace;
     dst->color_range            = src->color_range;
     dst->chroma_location        = src->chroma_location;
 
     av_dict_copy(&dst->metadata, src->metadata, 0);
 

 #if FF_API_ERROR_FRAME
 FF_DISABLE_DEPRECATION_WARNINGS

     memcpy(dst->error, src->error, sizeof(dst->error));

 FF_ENABLE_DEPRECATION_WARNINGS
 #endif

 
     for (i = 0; i < src->nb_side_data; i++) {
         const AVFrameSideData *sd_src = src->side_data[i];
         AVFrameSideData *sd_dst;
         if (   sd_src->type == AV_FRAME_DATA_PANSCAN
             && (src->width != dst->width || src->height != dst->height))
             continue;

         if (force_copy) {
             sd_dst = av_frame_new_side_data(dst, sd_src->type,
                                             sd_src->size);
             if (!sd_dst) {
                 wipe_side_data(dst);
                 return AVERROR(ENOMEM);
             }
             memcpy(sd_dst->data, sd_src->data, sd_src->size);
         } else {

             sd_dst = frame_new_side_data(dst, sd_src->type, av_buffer_ref(sd_src->buf));

             if (!sd_dst) {
                 wipe_side_data(dst);
                 return AVERROR(ENOMEM);
             }

         }
         av_dict_copy(&sd_dst->metadata, sd_src->metadata, 0);
     }
 

 #if FF_API_FRAME_QP
 FF_DISABLE_DEPRECATION_WARNINGS

     dst->qscale_table = NULL;
     dst->qstride      = 0;
     dst->qscale_type  = 0;

     av_buffer_unref(&dst->qp_table_buf);

     if (src->qp_table_buf) {
         dst->qp_table_buf = av_buffer_ref(src->qp_table_buf);
         if (dst->qp_table_buf) {
             dst->qscale_table = dst->qp_table_buf->data;
             dst->qstride      = src->qstride;
             dst->qscale_type  = src->qscale_type;
         }
     }

 FF_ENABLE_DEPRECATION_WARNINGS
 #endif

     av_buffer_unref(&dst->opaque_ref);

     av_buffer_unref(&dst->private_ref);

     if (src->opaque_ref) {
         dst->opaque_ref = av_buffer_ref(src->opaque_ref);
         if (!dst->opaque_ref)
             return AVERROR(ENOMEM);
     }

     if (src->private_ref) {
         dst->private_ref = av_buffer_ref(src->private_ref);
         if (!dst->private_ref)
             return AVERROR(ENOMEM);
     }

     return 0;
 }
 

 int av_frame_ref(AVFrame *dst, const AVFrame *src)

 {
     int i, ret = 0;
 

     av_assert1(dst->width == 0 && dst->height == 0);
     av_assert1(dst->channels == 0);
 

     dst->format         = src->format;
     dst->width          = src->width;
     dst->height         = src->height;

     dst->channels       = src->channels;

     dst->channel_layout = src->channel_layout;
     dst->nb_samples     = src->nb_samples;
 

     ret = frame_copy_props(dst, src, 0);

     if (ret < 0)
         return ret;
 
     /* duplicate the frame data if it's not refcounted */
     if (!src->buf[0]) {
         ret = av_frame_get_buffer(dst, 32);
         if (ret < 0)
             return ret;
 

         ret = av_frame_copy(dst, src);
         if (ret < 0)
             av_frame_unref(dst);
 
         return ret;

     }
 
     /* ref the buffers */

     for (i = 0; i < FF_ARRAY_ELEMS(src->buf); i++) {
         if (!src->buf[i])
             continue;

         dst->buf[i] = av_buffer_ref(src->buf[i]);
         if (!dst->buf[i]) {
             ret = AVERROR(ENOMEM);
             goto fail;
         }
     }
 
     if (src->extended_buf) {

         dst->extended_buf = av_mallocz_array(sizeof(*dst->extended_buf),

                                        src->nb_extended_buf);
         if (!dst->extended_buf) {
             ret = AVERROR(ENOMEM);
             goto fail;
         }
         dst->nb_extended_buf = src->nb_extended_buf;
 
         for (i = 0; i < src->nb_extended_buf; i++) {
             dst->extended_buf[i] = av_buffer_ref(src->extended_buf[i]);
             if (!dst->extended_buf[i]) {
                 ret = AVERROR(ENOMEM);
                 goto fail;
             }
         }
     }
 

     if (src->hw_frames_ctx) {
         dst->hw_frames_ctx = av_buffer_ref(src->hw_frames_ctx);
         if (!dst->hw_frames_ctx) {
             ret = AVERROR(ENOMEM);
             goto fail;
         }
     }
 

     /* duplicate extended data */
     if (src->extended_data != src->data) {

         int ch = src->channels;

 
         if (!ch) {
             ret = AVERROR(EINVAL);
             goto fail;
         }

         CHECK_CHANNELS_CONSISTENCY(src);

         dst->extended_data = av_malloc_array(sizeof(*dst->extended_data), ch);

         if (!dst->extended_data) {
             ret = AVERROR(ENOMEM);
             goto fail;
         }
         memcpy(dst->extended_data, src->extended_data, sizeof(*src->extended_data) * ch);
     } else
         dst->extended_data = dst->data;
 
     memcpy(dst->data,     src->data,     sizeof(src->data));
     memcpy(dst->linesize, src->linesize, sizeof(src->linesize));
 
     return 0;
 
 fail:
     av_frame_unref(dst);
     return ret;
 }
 

 AVFrame *av_frame_clone(const AVFrame *src)

 {
     AVFrame *ret = av_frame_alloc();
 
     if (!ret)
         return NULL;
 
     if (av_frame_ref(ret, src) < 0)
         av_frame_free(&ret);
 
     return ret;
 }
 
 void av_frame_unref(AVFrame *frame)
 {
     int i;
 

     if (!frame)
         return;
 

     wipe_side_data(frame);

     for (i = 0; i < FF_ARRAY_ELEMS(frame->buf); i++)
         av_buffer_unref(&frame->buf[i]);
     for (i = 0; i < frame->nb_extended_buf; i++)
         av_buffer_unref(&frame->extended_buf[i]);
     av_freep(&frame->extended_buf);

     av_dict_free(&frame->metadata);

 #if FF_API_FRAME_QP

     av_buffer_unref(&frame->qp_table_buf);

 #endif

     av_buffer_unref(&frame->hw_frames_ctx);
 

     av_buffer_unref(&frame->opaque_ref);

     av_buffer_unref(&frame->private_ref);

     get_frame_defaults(frame);
 }
 
 void av_frame_move_ref(AVFrame *dst, AVFrame *src)
 {

     av_assert1(dst->width == 0 && dst->height == 0);
     av_assert1(dst->channels == 0);
 

     *dst = *src;
     if (src->extended_data == src->data)
         dst->extended_data = dst->data;
     memset(src, 0, sizeof(*src));
     get_frame_defaults(src);
 }
 
 int av_frame_is_writable(AVFrame *frame)
 {
     int i, ret = 1;
 
     /* assume non-refcounted frames are not writable */
     if (!frame->buf[0])
         return 0;
 

     for (i = 0; i < FF_ARRAY_ELEMS(frame->buf); i++)
         if (frame->buf[i])
             ret &= !!av_buffer_is_writable(frame->buf[i]);

     for (i = 0; i < frame->nb_extended_buf; i++)
         ret &= !!av_buffer_is_writable(frame->extended_buf[i]);
 
     return ret;
 }
 
 int av_frame_make_writable(AVFrame *frame)
 {
     AVFrame tmp;
     int ret;
 
     if (!frame->buf[0])
         return AVERROR(EINVAL);
 
     if (av_frame_is_writable(frame))
         return 0;
 
     memset(&tmp, 0, sizeof(tmp));
     tmp.format         = frame->format;
     tmp.width          = frame->width;
     tmp.height         = frame->height;

     tmp.channels       = frame->channels;

     tmp.channel_layout = frame->channel_layout;
     tmp.nb_samples     = frame->nb_samples;
     ret = av_frame_get_buffer(&tmp, 32);
     if (ret < 0)
         return ret;
 

     ret = av_frame_copy(&tmp, frame);
     if (ret < 0) {
         av_frame_unref(&tmp);
         return ret;

     }
 
     ret = av_frame_copy_props(&tmp, frame);
     if (ret < 0) {
         av_frame_unref(&tmp);
         return ret;
     }
 
     av_frame_unref(frame);
 
     *frame = tmp;
     if (tmp.data == tmp.extended_data)
         frame->extended_data = frame->data;
 
     return 0;
 }
 

 int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
 {
     return frame_copy_props(dst, src, 1);
 }
 

 AVBufferRef *av_frame_get_plane_buffer(AVFrame *frame, int plane)
 {
     uint8_t *data;
     int planes, i;
 
     if (frame->nb_samples) {

         int channels = frame->channels;

         if (!channels)
             return NULL;

         CHECK_CHANNELS_CONSISTENCY(frame);

         planes = av_sample_fmt_is_planar(frame->format) ? channels : 1;
     } else
         planes = 4;
 
     if (plane < 0 || plane >= planes || !frame->extended_data[plane])
         return NULL;
     data = frame->extended_data[plane];
 
     for (i = 0; i < FF_ARRAY_ELEMS(frame->buf) && frame->buf[i]; i++) {
         AVBufferRef *buf = frame->buf[i];
         if (data >= buf->data && data < buf->data + buf->size)
             return buf;
     }
     for (i = 0; i < frame->nb_extended_buf; i++) {
         AVBufferRef *buf = frame->extended_buf[i];
         if (data >= buf->data && data < buf->data + buf->size)
             return buf;
     }
     return NULL;
 }

 static AVFrameSideData *frame_new_side_data(AVFrame *frame,
                                             enum AVFrameSideDataType type,
                                             AVBufferRef *buf)

 {
     AVFrameSideData *ret, **tmp;
 

     if (!buf)

         return NULL;
 

     if (frame->nb_side_data > INT_MAX / sizeof(*frame->side_data) - 1)
         goto fail;
 

     tmp = av_realloc(frame->side_data,
                      (frame->nb_side_data + 1) * sizeof(*frame->side_data));
     if (!tmp)

         goto fail;

     frame->side_data = tmp;
 
     ret = av_mallocz(sizeof(*ret));
     if (!ret)

         goto fail;

     ret->buf = buf;
     ret->data = ret->buf->data;
     ret->size = buf->size;

     ret->type = type;
 
     frame->side_data[frame->nb_side_data++] = ret;
 
     return ret;

 fail:
     av_buffer_unref(&buf);
     return NULL;
 }
 
 AVFrameSideData *av_frame_new_side_data(AVFrame *frame,
                                         enum AVFrameSideDataType type,
                                         int size)
 {
 
     return frame_new_side_data(frame, type, av_buffer_alloc(size));

 }
 

 AVFrameSideData *av_frame_get_side_data(const AVFrame *frame,

                                         enum AVFrameSideDataType type)
 {
     int i;
 
     for (i = 0; i < frame->nb_side_data; i++) {
         if (frame->side_data[i]->type == type)
             return frame->side_data[i];
     }
     return NULL;
 }

 
 static int frame_copy_video(AVFrame *dst, const AVFrame *src)
 {
     const uint8_t *src_data[4];
     int i, planes;
 

     if (dst->width  < src->width ||
         dst->height < src->height)

         return AVERROR(EINVAL);
 
     planes = av_pix_fmt_count_planes(dst->format);
     for (i = 0; i < planes; i++)
         if (!dst->data[i] || !src->data[i])
             return AVERROR(EINVAL);
 
     memcpy(src_data, src->data, sizeof(src_data));
     av_image_copy(dst->data, dst->linesize,
                   src_data, src->linesize,

                   dst->format, src->width, src->height);

 
     return 0;
 }
 
 static int frame_copy_audio(AVFrame *dst, const AVFrame *src)
 {
     int planar   = av_sample_fmt_is_planar(dst->format);

     int channels = dst->channels;

     int planes   = planar ? channels : 1;
     int i;
 
     if (dst->nb_samples     != src->nb_samples ||

         dst->channels       != src->channels ||

         dst->channel_layout != src->channel_layout)
         return AVERROR(EINVAL);
 

     CHECK_CHANNELS_CONSISTENCY(src);
 

     for (i = 0; i < planes; i++)
         if (!dst->extended_data[i] || !src->extended_data[i])
             return AVERROR(EINVAL);
 
     av_samples_copy(dst->extended_data, src->extended_data, 0, 0,
                     dst->nb_samples, channels, dst->format);
 
     return 0;
 }
 
 int av_frame_copy(AVFrame *dst, const AVFrame *src)
 {
     if (dst->format != src->format || dst->format < 0)
         return AVERROR(EINVAL);
 
     if (dst->width > 0 && dst->height > 0)
         return frame_copy_video(dst, src);

     else if (dst->nb_samples > 0 && dst->channels > 0)

         return frame_copy_audio(dst, src);
 
     return AVERROR(EINVAL);
 }

 
 void av_frame_remove_side_data(AVFrame *frame, enum AVFrameSideDataType type)
 {
     int i;
 
     for (i = 0; i < frame->nb_side_data; i++) {
         AVFrameSideData *sd = frame->side_data[i];
         if (sd->type == type) {

             free_side_data(&frame->side_data[i]);

             frame->side_data[i] = frame->side_data[frame->nb_side_data - 1];
             frame->nb_side_data--;
         }
     }
 }

 
 const char *av_frame_side_data_name(enum AVFrameSideDataType type)
 {
     switch(type) {
     case AV_FRAME_DATA_PANSCAN:         return "AVPanScan";
     case AV_FRAME_DATA_A53_CC:          return "ATSC A53 Part 4 Closed Captions";
     case AV_FRAME_DATA_STEREO3D:        return "Stereoscopic 3d metadata";
     case AV_FRAME_DATA_MATRIXENCODING:  return "AVMatrixEncoding";
     case AV_FRAME_DATA_DOWNMIX_INFO:    return "Metadata relevant to a downmix procedure";
     case AV_FRAME_DATA_REPLAYGAIN:      return "AVReplayGain";
     case AV_FRAME_DATA_DISPLAYMATRIX:   return "3x3 displaymatrix";

     case AV_FRAME_DATA_AFD:             return "Active format description";

     case AV_FRAME_DATA_MOTION_VECTORS:  return "Motion vectors";

     case AV_FRAME_DATA_SKIP_SAMPLES:    return "Skip samples";
     case AV_FRAME_DATA_AUDIO_SERVICE_TYPE:          return "Audio service type";
     case AV_FRAME_DATA_MASTERING_DISPLAY_METADATA:  return "Mastering display metadata";

     case AV_FRAME_DATA_CONTENT_LIGHT_LEVEL:         return "Content light level metadata";

     case AV_FRAME_DATA_GOP_TIMECODE:                return "GOP timecode";

     case AV_FRAME_DATA_ICC_PROFILE:                 return "ICC profile";

     }
     return NULL;
 }

 
 static int calc_cropping_offsets(size_t offsets[4], const AVFrame *frame,
                                  const AVPixFmtDescriptor *desc)
 {
     int i, j;
 
     for (i = 0; frame->data[i]; i++) {
         const AVComponentDescriptor *comp = NULL;
         int shift_x = (i == 1 || i == 2) ? desc->log2_chroma_w : 0;
         int shift_y = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
 
         if (desc->flags & (AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_PSEUDOPAL) && i == 1) {
             offsets[i] = 0;
             break;
         }
 
         /* find any component descriptor for this plane */
         for (j = 0; j < desc->nb_components; j++) {
             if (desc->comp[j].plane == i) {
                 comp = &desc->comp[j];
                 break;
             }
         }
         if (!comp)
             return AVERROR_BUG;
 
         offsets[i] = (frame->crop_top  >> shift_y) * frame->linesize[i] +
                      (frame->crop_left >> shift_x) * comp->step;
     }
 
     return 0;
 }
 
 int av_frame_apply_cropping(AVFrame *frame, int flags)
 {
     const AVPixFmtDescriptor *desc;
     size_t offsets[4];
     int i;
 
     if (!(frame->width > 0 && frame->height > 0))
         return AVERROR(EINVAL);
 
     if (frame->crop_left >= INT_MAX - frame->crop_right        ||
         frame->crop_top  >= INT_MAX - frame->crop_bottom       ||
         (frame->crop_left + frame->crop_right) >= frame->width ||
         (frame->crop_top + frame->crop_bottom) >= frame->height)
         return AVERROR(ERANGE);
 
     desc = av_pix_fmt_desc_get(frame->format);
     if (!desc)
         return AVERROR_BUG;
 
     /* Apply just the right/bottom cropping for hwaccel formats. Bitstream
      * formats cannot be easily handled here either (and corresponding decoders
      * should not export any cropping anyway), so do the same for those as well.
      * */
     if (desc->flags & (AV_PIX_FMT_FLAG_BITSTREAM | AV_PIX_FMT_FLAG_HWACCEL)) {
         frame->width      -= frame->crop_right;
         frame->height     -= frame->crop_bottom;
         frame->crop_right  = 0;
         frame->crop_bottom = 0;
         return 0;
     }
 
     /* calculate the offsets for each plane */
     calc_cropping_offsets(offsets, frame, desc);
 
     /* adjust the offsets to avoid breaking alignment */
     if (!(flags & AV_FRAME_CROP_UNALIGNED)) {
         int log2_crop_align = frame->crop_left ? ff_ctz(frame->crop_left) : INT_MAX;
         int min_log2_align = INT_MAX;
 
         for (i = 0; frame->data[i]; i++) {
             int log2_align = offsets[i] ? ff_ctz(offsets[i]) : INT_MAX;
             min_log2_align = FFMIN(log2_align, min_log2_align);
         }
 
         /* we assume, and it should always be true, that the data alignment is
          * related to the cropping alignment by a constant power-of-2 factor */
         if (log2_crop_align < min_log2_align)
             return AVERROR_BUG;
 
         if (min_log2_align < 5) {
             frame->crop_left &= ~((1 << (5 + log2_crop_align - min_log2_align)) - 1);
             calc_cropping_offsets(offsets, frame, desc);
         }
     }
 
     for (i = 0; frame->data[i]; i++)
         frame->data[i] += offsets[i];
 
     frame->width      -= (frame->crop_left + frame->crop_right);
     frame->height     -= (frame->crop_top  + frame->crop_bottom);
     frame->crop_left   = 0;
     frame->crop_right  = 0;
     frame->crop_top    = 0;
     frame->crop_bottom = 0;
 
     return 0;
 }