/*
  * Copyright (c) 2007 Nicolas George <nicolas.george@normalesup.org>
  * Copyright (c) 2011 Stefano Sabatini

  * Copyright (c) 2012 Paul B Mahol

  *
  * 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
  */
 
 /**
  * @file

  * Misc test sources.
  *
  * testsrc is based on the test pattern generator demuxer by Nicolas George:

  * http://lists.ffmpeg.org/pipermail/ffmpeg-devel/2007-October/037845.html

  *
  * rgbtestsrc is ported from MPlayer libmpcodecs/vf_rgbtest.c by
  * Michael Niedermayer.

  *

  * smptebars and smptehdbars are by Paul B Mahol.

  */
 
 #include <float.h>
 

 #include "libavutil/avassert.h"

 #include "libavutil/common.h"

 #include "libavutil/opt.h"

 #include "libavutil/imgutils.h"

 #include "libavutil/intreadwrite.h"

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

 #include "drawutils.h"

 #include "formats.h"

 #include "internal.h"

 #include "video.h"

 
 typedef struct {
     const AVClass *class;

     int w, h;

     unsigned int nb_frame;

     AVRational time_base, frame_rate;

     int64_t pts;
     int64_t duration;           ///< duration expressed in microseconds

     AVRational sar;             ///< sample aspect ratio

     int draw_once;              ///< draw only the first frame, always put out the same picture

     int draw_once_reset;        ///< draw only the first frame or in case of reset

     AVFrame *picref;            ///< cached reference containing the painted picture

     void (* fill_picture_fn)(AVFilterContext *ctx, AVFrame *frame);

     /* only used by testsrc */
     int nb_decimals;
 

     /* only used by color */
     FFDrawContext draw;
     FFDrawColor color;
     uint8_t color_rgba[4];
 

     /* only used by rgbtest */

     uint8_t rgba_map[4];

 
     /* only used by haldclut */
     int level;

 } TestSourceContext;
 
 #define OFFSET(x) offsetof(TestSourceContext, x)

 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

 #define SIZE_OPTIONS \

     { "size",     "set video size",     OFFSET(w),        AV_OPT_TYPE_IMAGE_SIZE, {.str = "320x240"}, 0, 0, FLAGS },\
     { "s",        "set video size",     OFFSET(w),        AV_OPT_TYPE_IMAGE_SIZE, {.str = "320x240"}, 0, 0, FLAGS },\

 
 #define COMMON_OPTIONS_NOSIZE \

     { "rate",     "set video rate",     OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, FLAGS },\
     { "r",        "set video rate",     OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, FLAGS },\

     { "duration", "set video duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = -1}, -1, INT64_MAX, FLAGS },\
     { "d",        "set video duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = -1}, -1, INT64_MAX, FLAGS },\

     { "sar",      "set video sample aspect ratio", OFFSET(sar), AV_OPT_TYPE_RATIONAL, {.dbl= 1},  0, INT_MAX, FLAGS },

 #define COMMON_OPTIONS SIZE_OPTIONS COMMON_OPTIONS_NOSIZE

 
 static const AVOption options[] = {

     COMMON_OPTIONS

     { NULL }

 };
 

 static av_cold int init(AVFilterContext *ctx)

 {
     TestSourceContext *test = ctx->priv;
 

     test->time_base = av_inv_q(test->frame_rate);

     test->nb_frame = 0;
     test->pts = 0;
 

     av_log(ctx, AV_LOG_VERBOSE, "size:%dx%d rate:%d/%d duration:%f sar:%d/%d\n",

            test->w, test->h, test->frame_rate.num, test->frame_rate.den,

            test->duration < 0 ? -1 : (double)test->duration/1000000,

            test->sar.num, test->sar.den);

     return 0;
 }
 

 static av_cold void uninit(AVFilterContext *ctx)
 {
     TestSourceContext *test = ctx->priv;
 

     av_frame_free(&test->picref);

 }
 

 static int config_props(AVFilterLink *outlink)
 {
     TestSourceContext *test = outlink->src->priv;
 
     outlink->w = test->w;
     outlink->h = test->h;

     outlink->sample_aspect_ratio = test->sar;

     outlink->frame_rate = test->frame_rate;
     outlink->time_base  = test->time_base;

 
     return 0;
 }
 

 static int request_frame(AVFilterLink *outlink)
 {
     TestSourceContext *test = outlink->src->priv;

     AVFrame *frame;

     if (test->duration >= 0 &&
         av_rescale_q(test->pts, test->time_base, AV_TIME_BASE_Q) >= test->duration)

         return AVERROR_EOF;

     if (test->draw_once) {

         if (test->draw_once_reset) {
             av_frame_free(&test->picref);
             test->draw_once_reset = 0;
         }

         if (!test->picref) {
             test->picref =

                 ff_get_video_buffer(outlink, test->w, test->h);

             if (!test->picref)
                 return AVERROR(ENOMEM);
             test->fill_picture_fn(outlink->src, test->picref);
         }

         frame = av_frame_clone(test->picref);

     } else

         frame = ff_get_video_buffer(outlink, test->w, test->h);

     if (!frame)

         return AVERROR(ENOMEM);

     frame->pts                 = test->pts;

     frame->key_frame           = 1;
     frame->interlaced_frame    = 0;
     frame->pict_type           = AV_PICTURE_TYPE_I;
     frame->sample_aspect_ratio = test->sar;

     if (!test->draw_once)

         test->fill_picture_fn(outlink->src, frame);

 
     test->pts++;

     test->nb_frame++;

     return ff_filter_frame(outlink, frame);

 }
 

 #if CONFIG_COLOR_FILTER
 

 static const AVOption color_options[] = {
     { "color", "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, CHAR_MIN, CHAR_MAX, FLAGS },
     { "c",     "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, CHAR_MIN, CHAR_MAX, FLAGS },
     COMMON_OPTIONS
     { NULL }
 };
 

 AVFILTER_DEFINE_CLASS(color);
 

 static void color_fill_picture(AVFilterContext *ctx, AVFrame *picref)

 {
     TestSourceContext *test = ctx->priv;
     ff_fill_rectangle(&test->draw, &test->color,
                       picref->data, picref->linesize,
                       0, 0, test->w, test->h);
 }
 

 static av_cold int color_init(AVFilterContext *ctx)

 {
     TestSourceContext *test = ctx->priv;
     test->fill_picture_fn = color_fill_picture;
     test->draw_once = 1;

     return init(ctx);

 }
 
 static int color_query_formats(AVFilterContext *ctx)
 {
     ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
     return 0;
 }
 
 static int color_config_props(AVFilterLink *inlink)
 {
     AVFilterContext *ctx = inlink->src;
     TestSourceContext *test = ctx->priv;
     int ret;
 
     ff_draw_init(&test->draw, inlink->format, 0);
     ff_draw_color(&test->draw, &test->color, test->color_rgba);
 
     test->w = ff_draw_round_to_sub(&test->draw, 0, -1, test->w);
     test->h = ff_draw_round_to_sub(&test->draw, 1, -1, test->h);
     if (av_image_check_size(test->w, test->h, 0, ctx) < 0)
         return AVERROR(EINVAL);
 

     if ((ret = config_props(inlink)) < 0)

         return ret;
 
     return 0;
 }
 

 static int color_process_command(AVFilterContext *ctx, const char *cmd, const char *args,
                                  char *res, int res_len, int flags)
 {
     TestSourceContext *test = ctx->priv;
     int ret;
 
     if (!strcmp(cmd, "color") || !strcmp(cmd, "c")) {
         uint8_t color_rgba[4];
 
         ret = av_parse_color(color_rgba, args, -1, ctx);
         if (ret < 0)
             return ret;
 
         memcpy(test->color_rgba, color_rgba, sizeof(color_rgba));
         ff_draw_color(&test->draw, &test->color, test->color_rgba);
         test->draw_once_reset = 1;
         return 0;
     }
 
     return AVERROR(ENOSYS);
 }
 

 static const AVFilterPad color_outputs[] = {
     {
         .name          = "default",
         .type          = AVMEDIA_TYPE_VIDEO,
         .request_frame = request_frame,
         .config_props  = color_config_props,
     },
     {  NULL }
 };
 

 AVFilter avfilter_vsrc_color = {
     .name        = "color",
     .description = NULL_IF_CONFIG_SMALL("Provide an uniformly colored input."),
 

     .priv_class = &color_class,

     .priv_size = sizeof(TestSourceContext),
     .init      = color_init,
     .uninit    = uninit,
 
     .query_formats = color_query_formats,

     .inputs        = NULL,
     .outputs       = color_outputs,

     .process_command = color_process_command,

 };
 
 #endif /* CONFIG_COLOR_FILTER */
 

 #if CONFIG_HALDCLUTSRC_FILTER
 
 static const AVOption haldclutsrc_options[] = {
     { "level", "set level", OFFSET(level), AV_OPT_TYPE_INT, {.i64 = 6}, 2, 8, FLAGS },

     COMMON_OPTIONS_NOSIZE

     { NULL }
 };
 
 AVFILTER_DEFINE_CLASS(haldclutsrc);
 
 static void haldclutsrc_fill_picture(AVFilterContext *ctx, AVFrame *frame)
 {
     int i, j, k, x = 0, y = 0, is16bit = 0, step;
     uint32_t alpha = 0;
     const TestSourceContext *hc = ctx->priv;
     int level = hc->level;
     float scale;
     const int w = frame->width;
     const int h = frame->height;
     const uint8_t *data = frame->data[0];
     const int linesize  = frame->linesize[0];
     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
     uint8_t rgba_map[4];
 
     av_assert0(w == h && w == level*level*level);
 
     ff_fill_rgba_map(rgba_map, frame->format);
 
     switch (frame->format) {
     case AV_PIX_FMT_RGB48:
     case AV_PIX_FMT_BGR48:
     case AV_PIX_FMT_RGBA64:
     case AV_PIX_FMT_BGRA64:
         is16bit = 1;
         alpha = 0xffff;
         break;
     case AV_PIX_FMT_RGBA:
     case AV_PIX_FMT_BGRA:
     case AV_PIX_FMT_ARGB:
     case AV_PIX_FMT_ABGR:
         alpha = 0xff;
         break;
     }
 
     step  = av_get_padded_bits_per_pixel(desc) >> (3 + is16bit);
     scale = ((float)(1 << (8*(is16bit+1))) - 1) / (level*level - 1);
 
 #define LOAD_CLUT(nbits) do {                                                   \
     uint##nbits##_t *dst = ((uint##nbits##_t *)(data + y*linesize)) + x*step;   \
     dst[rgba_map[0]] = av_clip_uint##nbits(i * scale);                          \
     dst[rgba_map[1]] = av_clip_uint##nbits(j * scale);                          \
     dst[rgba_map[2]] = av_clip_uint##nbits(k * scale);                          \
     if (step == 4)                                                              \
         dst[rgba_map[3]] = alpha;                                               \
 } while (0)
 
     level *= level;
     for (k = 0; k < level; k++) {
         for (j = 0; j < level; j++) {
             for (i = 0; i < level; i++) {
                 if (!is16bit)
                     LOAD_CLUT(8);
                 else
                     LOAD_CLUT(16);
                 if (++x == w) {
                     x = 0;
                     y++;
                 }
             }
         }
     }
 }
 
 static av_cold int haldclutsrc_init(AVFilterContext *ctx)
 {
     TestSourceContext *hc = ctx->priv;
     hc->fill_picture_fn = haldclutsrc_fill_picture;
     hc->draw_once = 1;
     return init(ctx);
 }
 
 static int haldclutsrc_query_formats(AVFilterContext *ctx)
 {
     static const enum AVPixelFormat pix_fmts[] = {
         AV_PIX_FMT_RGB24,  AV_PIX_FMT_BGR24,
         AV_PIX_FMT_RGBA,   AV_PIX_FMT_BGRA,
         AV_PIX_FMT_ARGB,   AV_PIX_FMT_ABGR,
         AV_PIX_FMT_0RGB,   AV_PIX_FMT_0BGR,
         AV_PIX_FMT_RGB0,   AV_PIX_FMT_BGR0,
         AV_PIX_FMT_RGB48,  AV_PIX_FMT_BGR48,
         AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64,
         AV_PIX_FMT_NONE,
     };
     ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
     return 0;
 }
 
 static int haldclutsrc_config_props(AVFilterLink *outlink)
 {
     AVFilterContext *ctx = outlink->src;
     TestSourceContext *hc = ctx->priv;
 
     hc->w = hc->h = hc->level * hc->level * hc->level;
     return config_props(outlink);
 }
 
 static const AVFilterPad haldclutsrc_outputs[] = {
     {
         .name          = "default",
         .type          = AVMEDIA_TYPE_VIDEO,
         .request_frame = request_frame,
         .config_props  = haldclutsrc_config_props,
     },
     {  NULL }
 };
 
 AVFilter avfilter_vsrc_haldclutsrc = {
     .name            = "haldclutsrc",
     .description     = NULL_IF_CONFIG_SMALL("Provide an identity Hald CLUT."),
     .priv_class      = &haldclutsrc_class,
     .priv_size       = sizeof(TestSourceContext),
     .init            = haldclutsrc_init,
     .uninit          = uninit,
     .query_formats   = haldclutsrc_query_formats,
     .inputs          = NULL,
     .outputs         = haldclutsrc_outputs,
 };
 #endif /* CONFIG_HALDCLUTSRC_FILTER */
 

 #if CONFIG_NULLSRC_FILTER
 

 #define nullsrc_options options
 AVFILTER_DEFINE_CLASS(nullsrc);

 static void nullsrc_fill_picture(AVFilterContext *ctx, AVFrame *picref) { }

 static av_cold int nullsrc_init(AVFilterContext *ctx)

 {
     TestSourceContext *test = ctx->priv;
 
     test->fill_picture_fn = nullsrc_fill_picture;

     return init(ctx);

 }
 

 static const AVFilterPad nullsrc_outputs[] = {
     {
         .name          = "default",
         .type          = AVMEDIA_TYPE_VIDEO,
         .request_frame = request_frame,
         .config_props  = config_props,
     },
     { NULL },
 };
 

 AVFilter avfilter_vsrc_nullsrc = {
     .name        = "nullsrc",
     .description = NULL_IF_CONFIG_SMALL("Null video source, return unprocessed video frames."),
     .init       = nullsrc_init,

     .uninit     = uninit,

     .priv_size  = sizeof(TestSourceContext),

     .priv_class = &nullsrc_class,

     .inputs     = NULL,
     .outputs    = nullsrc_outputs,

 };
 
 #endif /* CONFIG_NULLSRC_FILTER */
 

 #if CONFIG_TESTSRC_FILTER
 

 static const AVOption testsrc_options[] = {
     COMMON_OPTIONS
     { "decimals", "set number of decimals to show", OFFSET(nb_decimals), AV_OPT_TYPE_INT, {.i64=0},  0, 17, FLAGS },
     { "n",        "set number of decimals to show", OFFSET(nb_decimals), AV_OPT_TYPE_INT, {.i64=0},  0, 17, FLAGS },
     { NULL }
 };
 

 AVFILTER_DEFINE_CLASS(testsrc);

 /**
  * Fill a rectangle with value val.
  *
  * @param val the RGB value to set
  * @param dst pointer to the destination buffer to fill
  * @param dst_linesize linesize of destination
  * @param segment_width width of the segment
  * @param x horizontal coordinate where to draw the rectangle in the destination buffer
  * @param y horizontal coordinate where to draw the rectangle in the destination buffer
  * @param w width  of the rectangle to draw, expressed as a number of segment_width units
  * @param h height of the rectangle to draw, expressed as a number of segment_width units
  */

 static void draw_rectangle(unsigned val, uint8_t *dst, int dst_linesize, int segment_width,
                            int x, int y, int w, int h)

 {
     int i;
     int step = 3;
 
     dst += segment_width * (step * x + y * dst_linesize);
     w *= segment_width * step;
     h *= segment_width;
     for (i = 0; i < h; i++) {
         memset(dst, val, w);
         dst += dst_linesize;
     }
 }
 

 static void draw_digit(int digit, uint8_t *dst, int dst_linesize,
                        int segment_width)

 {
 #define TOP_HBAR        1
 #define MID_HBAR        2
 #define BOT_HBAR        4
 #define LEFT_TOP_VBAR   8
 #define LEFT_BOT_VBAR  16
 #define RIGHT_TOP_VBAR 32
 #define RIGHT_BOT_VBAR 64
     struct {
         int x, y, w, h;
     } segments[] = {
         { 1,  0, 5, 1 }, /* TOP_HBAR */
         { 1,  6, 5, 1 }, /* MID_HBAR */
         { 1, 12, 5, 1 }, /* BOT_HBAR */
         { 0,  1, 1, 5 }, /* LEFT_TOP_VBAR */
         { 0,  7, 1, 5 }, /* LEFT_BOT_VBAR */
         { 6,  1, 1, 5 }, /* RIGHT_TOP_VBAR */
         { 6,  7, 1, 5 }  /* RIGHT_BOT_VBAR */
     };
     static const unsigned char masks[10] = {
         /* 0 */ TOP_HBAR         |BOT_HBAR|LEFT_TOP_VBAR|LEFT_BOT_VBAR|RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
         /* 1 */                                                        RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
         /* 2 */ TOP_HBAR|MID_HBAR|BOT_HBAR|LEFT_BOT_VBAR                             |RIGHT_TOP_VBAR,
         /* 3 */ TOP_HBAR|MID_HBAR|BOT_HBAR                            |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
         /* 4 */          MID_HBAR         |LEFT_TOP_VBAR              |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
         /* 5 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR                             |RIGHT_BOT_VBAR,
         /* 6 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR|LEFT_BOT_VBAR               |RIGHT_BOT_VBAR,
         /* 7 */ TOP_HBAR                                              |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
         /* 8 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR|LEFT_BOT_VBAR|RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
         /* 9 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR              |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
     };
     unsigned mask = masks[digit];
     int i;
 
     draw_rectangle(0, dst, dst_linesize, segment_width, 0, 0, 8, 13);
     for (i = 0; i < FF_ARRAY_ELEMS(segments); i++)
         if (mask & (1<<i))
             draw_rectangle(255, dst, dst_linesize, segment_width,
                            segments[i].x, segments[i].y, segments[i].w, segments[i].h);
 }
 
 #define GRADIENT_SIZE (6 * 256)
 

 static void test_fill_picture(AVFilterContext *ctx, AVFrame *frame)

 {

     TestSourceContext *test = ctx->priv;

     uint8_t *p, *p0;
     int x, y;
     int color, color_rest;
     int icolor;
     int radius;
     int quad0, quad;
     int dquad_x, dquad_y;
     int grad, dgrad, rgrad, drgrad;
     int seg_size;
     int second;
     int i;

     uint8_t *data = frame->data[0];
     int width  = frame->width;
     int height = frame->height;

 
     /* draw colored bars and circle */
     radius = (width + height) / 4;
     quad0 = width * width / 4 + height * height / 4 - radius * radius;
     dquad_y = 1 - height;
     p0 = data;
     for (y = 0; y < height; y++) {
         p = p0;
         color = 0;
         color_rest = 0;
         quad = quad0;
         dquad_x = 1 - width;
         for (x = 0; x < width; x++) {
             icolor = color;
             if (quad < 0)
                 icolor ^= 7;
             quad += dquad_x;
             dquad_x += 2;
             *(p++) = icolor & 1 ? 255 : 0;
             *(p++) = icolor & 2 ? 255 : 0;
             *(p++) = icolor & 4 ? 255 : 0;
             color_rest += 8;
             if (color_rest >= width) {
                 color_rest -= width;
                 color++;
             }
         }
         quad0 += dquad_y;
         dquad_y += 2;

         p0 += frame->linesize[0];

     }
 
     /* draw sliding color line */

     p0 = p = data + frame->linesize[0] * (height * 3/4);

     grad = (256 * test->nb_frame * test->time_base.num / test->time_base.den) %
         GRADIENT_SIZE;
     rgrad = 0;
     dgrad = GRADIENT_SIZE / width;
     drgrad = GRADIENT_SIZE % width;
     for (x = 0; x < width; x++) {
         *(p++) =
             grad < 256 || grad >= 5 * 256 ? 255 :
             grad >= 2 * 256 && grad < 4 * 256 ? 0 :
             grad < 2 * 256 ? 2 * 256 - 1 - grad : grad - 4 * 256;
         *(p++) =
             grad >= 4 * 256 ? 0 :
             grad >= 1 * 256 && grad < 3 * 256 ? 255 :
             grad < 1 * 256 ? grad : 4 * 256 - 1 - grad;
         *(p++) =
             grad < 2 * 256 ? 0 :
             grad >= 3 * 256 && grad < 5 * 256 ? 255 :
             grad < 3 * 256 ? grad - 2 * 256 : 6 * 256 - 1 - grad;
         grad += dgrad;
         rgrad += drgrad;
         if (rgrad >= GRADIENT_SIZE) {
             grad++;
             rgrad -= GRADIENT_SIZE;
         }
         if (grad >= GRADIENT_SIZE)
             grad -= GRADIENT_SIZE;
     }

     p = p0;

     for (y = height / 8; y > 0; y--) {

         memcpy(p+frame->linesize[0], p, 3 * width);

         p += frame->linesize[0];

     }
 
     /* draw digits */
     seg_size = width / 80;
     if (seg_size >= 1 && height >= 13 * seg_size) {

         int64_t p10decimals = 1;

         double time = av_q2d(test->time_base) * test->nb_frame *
                       pow(10, test->nb_decimals);

         if (time >= INT_MAX)

             return;

         for (x = 0; x < test->nb_decimals; x++)

             p10decimals *= 10;
 
         second = av_rescale_rnd(test->nb_frame * test->time_base.num, p10decimals, test->time_base.den, AV_ROUND_ZERO);

         x = width - (width - seg_size * 64) / 2;
         y = (height - seg_size * 13) / 2;

         p = data + (x*3 + y * frame->linesize[0]);

         for (i = 0; i < 8; i++) {
             p -= 3 * 8 * seg_size;

             draw_digit(second % 10, p, frame->linesize[0], seg_size);

             second /= 10;
             if (second == 0)
                 break;
         }
     }
 }
 

 static av_cold int test_init(AVFilterContext *ctx)

 {

     TestSourceContext *test = ctx->priv;

     test->fill_picture_fn = test_fill_picture;

     return init(ctx);

 }
 

 static int test_query_formats(AVFilterContext *ctx)

 {

     static const enum AVPixelFormat pix_fmts[] = {
         AV_PIX_FMT_RGB24, AV_PIX_FMT_NONE

     };

     ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));

     return 0;
 }
 

 static const AVFilterPad avfilter_vsrc_testsrc_outputs[] = {
     {
         .name          = "default",
         .type          = AVMEDIA_TYPE_VIDEO,
         .request_frame = request_frame,
         .config_props  = config_props,
     },
     { NULL }
 };
 

 AVFilter avfilter_vsrc_testsrc = {

     .name          = "testsrc",
     .description   = NULL_IF_CONFIG_SMALL("Generate test pattern."),
     .priv_size     = sizeof(TestSourceContext),

     .priv_class    = &testsrc_class,

     .init          = test_init,

     .uninit        = uninit,

     .query_formats = test_query_formats,

     .inputs    = NULL,

     .outputs   = avfilter_vsrc_testsrc_outputs,

 };

 
 #endif /* CONFIG_TESTSRC_FILTER */

 
 #if CONFIG_RGBTESTSRC_FILTER
 

 #define rgbtestsrc_options options
 AVFILTER_DEFINE_CLASS(rgbtestsrc);

 
 #define R 0
 #define G 1
 #define B 2
 #define A 3
 
 static void rgbtest_put_pixel(uint8_t *dst, int dst_linesize,

                               int x, int y, int r, int g, int b, enum AVPixelFormat fmt,

                               uint8_t rgba_map[4])

 {
     int32_t v;
     uint8_t *p;
 
     switch (fmt) {

     case AV_PIX_FMT_BGR444: ((uint16_t*)(dst + y*dst_linesize))[x] = ((r >> 4) << 8) | ((g >> 4) << 4) | (b >> 4); break;
     case AV_PIX_FMT_RGB444: ((uint16_t*)(dst + y*dst_linesize))[x] = ((b >> 4) << 8) | ((g >> 4) << 4) | (r >> 4); break;
     case AV_PIX_FMT_BGR555: ((uint16_t*)(dst + y*dst_linesize))[x] = ((r>>3)<<10) | ((g>>3)<<5) | (b>>3); break;
     case AV_PIX_FMT_RGB555: ((uint16_t*)(dst + y*dst_linesize))[x] = ((b>>3)<<10) | ((g>>3)<<5) | (r>>3); break;
     case AV_PIX_FMT_BGR565: ((uint16_t*)(dst + y*dst_linesize))[x] = ((r>>3)<<11) | ((g>>2)<<5) | (b>>3); break;
     case AV_PIX_FMT_RGB565: ((uint16_t*)(dst + y*dst_linesize))[x] = ((b>>3)<<11) | ((g>>2)<<5) | (r>>3); break;
     case AV_PIX_FMT_RGB24:
     case AV_PIX_FMT_BGR24:

         v = (r << (rgba_map[R]*8)) + (g << (rgba_map[G]*8)) + (b << (rgba_map[B]*8));
         p = dst + 3*x + y*dst_linesize;
         AV_WL24(p, v);
         break;

     case AV_PIX_FMT_RGBA:
     case AV_PIX_FMT_BGRA:
     case AV_PIX_FMT_ARGB:
     case AV_PIX_FMT_ABGR:

         v = (r << (rgba_map[R]*8)) + (g << (rgba_map[G]*8)) + (b << (rgba_map[B]*8)) + (255 << (rgba_map[A]*8));

         p = dst + 4*x + y*dst_linesize;
         AV_WL32(p, v);
         break;
     }
 }
 

 static void rgbtest_fill_picture(AVFilterContext *ctx, AVFrame *frame)

 {
     TestSourceContext *test = ctx->priv;

     int x, y, w = frame->width, h = frame->height;

 
     for (y = 0; y < h; y++) {

          for (x = 0; x < w; x++) {

              int c = 256*x/w;
              int r = 0, g = 0, b = 0;
 
              if      (3*y < h  ) r = c;
              else if (3*y < 2*h) g = c;
              else                b = c;
 

              rgbtest_put_pixel(frame->data[0], frame->linesize[0], x, y, r, g, b,

                                ctx->outputs[0]->format, test->rgba_map);
          }
      }
 }
 

 static av_cold int rgbtest_init(AVFilterContext *ctx)

 {
     TestSourceContext *test = ctx->priv;
 

     test->draw_once = 1;

     test->fill_picture_fn = rgbtest_fill_picture;

     return init(ctx);

 }
 
 static int rgbtest_query_formats(AVFilterContext *ctx)
 {

     static const enum AVPixelFormat pix_fmts[] = {
         AV_PIX_FMT_RGBA, AV_PIX_FMT_ARGB, AV_PIX_FMT_BGRA, AV_PIX_FMT_ABGR,
         AV_PIX_FMT_BGR24, AV_PIX_FMT_RGB24,
         AV_PIX_FMT_RGB444, AV_PIX_FMT_BGR444,
         AV_PIX_FMT_RGB565, AV_PIX_FMT_BGR565,
         AV_PIX_FMT_RGB555, AV_PIX_FMT_BGR555,
         AV_PIX_FMT_NONE

     };

     ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));

     return 0;
 }
 
 static int rgbtest_config_props(AVFilterLink *outlink)
 {
     TestSourceContext *test = outlink->src->priv;
 

     ff_fill_rgba_map(test->rgba_map, outlink->format);

     return config_props(outlink);
 }
 

 static const AVFilterPad avfilter_vsrc_rgbtestsrc_outputs[] = {
     {
         .name          = "default",
         .type          = AVMEDIA_TYPE_VIDEO,
         .request_frame = request_frame,
         .config_props  = rgbtest_config_props,
     },
     { NULL }
 };
 

 AVFilter avfilter_vsrc_rgbtestsrc = {

     .name          = "rgbtestsrc",
     .description   = NULL_IF_CONFIG_SMALL("Generate RGB test pattern."),
     .priv_size     = sizeof(TestSourceContext),

     .priv_class    = &rgbtestsrc_class,

     .init          = rgbtest_init,

     .uninit        = uninit,

     .query_formats = rgbtest_query_formats,

     .inputs    = NULL,

     .outputs   = avfilter_vsrc_rgbtestsrc_outputs,

 };
 
 #endif /* CONFIG_RGBTESTSRC_FILTER */

 #if CONFIG_SMPTEBARS_FILTER || CONFIG_SMPTEHDBARS_FILTER

 
 static const uint8_t rainbow[7][4] = {
     { 191, 191, 191, 255 },     /* gray */
     { 191, 191,   0, 255 },     /* yellow */
     {   0, 191, 191, 255 },     /* cyan */
     {   0, 191,   0, 255 },     /* green */
     { 191,   0, 191, 255 },     /* magenta */
     { 191,   0,   0, 255 },     /* red */
     {   0,   0, 191, 255 },     /* blue */
 };
 
 static const uint8_t wobnair[7][4] = {
     {   0,   0, 191, 255 },     /* blue */
     {  19,  19,  19, 255 },     /* 7.5% intensity black */
     { 191,   0, 191, 255 },     /* magenta */
     {  19,  19,  19, 255 },     /* 7.5% intensity black */
     {   0, 191, 191, 255 },     /* cyan */
     {  19,  19,  19, 255 },     /* 7.5% intensity black */
     { 191, 191, 191, 255 },     /* gray */
 };
 
 static const uint8_t white[4] = { 255, 255, 255, 255 };
 static const uint8_t black[4] = {  19,  19,  19, 255 }; /* 7.5% intensity black */
 
 /* pluge pulses */
 static const uint8_t neg4ire[4] = {   9,   9,   9, 255 }; /*  3.5% intensity black */
 static const uint8_t pos4ire[4] = {  29,  29,  29, 255 }; /* 11.5% intensity black */
 
 /* fudged Q/-I */
 static const uint8_t i_pixel[4] = {   0,  68, 130, 255 };
 static const uint8_t q_pixel[4] = {  67,   0, 130, 255 };
 

 static const uint8_t gray40[4] = { 102, 102, 102, 255 };
 static const uint8_t gray15[4] = {  38,  38,  38, 255 };
 static const uint8_t   cyan[4] = {   0, 255, 255, 255 };
 static const uint8_t yellow[4] = { 255, 255,   0, 255 };
 static const uint8_t   blue[4] = {   0,   0, 255, 255 };
 static const uint8_t    red[4] = { 255,   0,   0, 255 };
 static const uint8_t black0[4] = {   5,   5,   5, 255 };
 static const uint8_t black2[4] = {  10,  10,  10, 255 };
 static const uint8_t black4[4] = {  15,  15,  15, 255 };
 static const uint8_t   neg2[4] = {   0,   0,   0, 255 };
 

 static void inline draw_bar(TestSourceContext *test, const uint8_t *color,
                             unsigned x, unsigned y, unsigned w, unsigned h,
                             AVFrame *frame)
 {
     FFDrawColor draw_color;
 
     x = FFMIN(x, test->w - 1);
     y = FFMIN(y, test->h - 1);
     w = FFMIN(w, test->w - x);
     h = FFMIN(h, test->h - y);
 
     av_assert0(x + w <= test->w);
     av_assert0(y + h <= test->h);
 
     ff_draw_color(&test->draw, &draw_color, color);
     ff_fill_rectangle(&test->draw, &draw_color,
                       frame->data, frame->linesize, x, y, w, h);
 }
 

 static int smptebars_query_formats(AVFilterContext *ctx)
 {
     ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
     return 0;
 }
 
 static int smptebars_config_props(AVFilterLink *outlink)
 {
     AVFilterContext *ctx = outlink->src;
     TestSourceContext *test = ctx->priv;
 
     ff_draw_init(&test->draw, outlink->format, 0);
 
     return config_props(outlink);
 }
 
 static const AVFilterPad smptebars_outputs[] = {
     {
         .name          = "default",
         .type          = AVMEDIA_TYPE_VIDEO,
         .request_frame = request_frame,
         .config_props  = smptebars_config_props,
     },
     { NULL }
 };
 

 #if CONFIG_SMPTEBARS_FILTER

 
 #define smptebars_options options
 AVFILTER_DEFINE_CLASS(smptebars);
 

 static void smptebars_fill_picture(AVFilterContext *ctx, AVFrame *picref)

 {
     TestSourceContext *test = ctx->priv;

     int r_w, r_h, w_h, p_w, p_h, i, tmp, x = 0;
     const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(picref->format);

     r_w = FFALIGN((test->w + 6) / 7, 1 << pixdesc->log2_chroma_w);
     r_h = FFALIGN(test->h * 2 / 3, 1 << pixdesc->log2_chroma_h);
     w_h = FFALIGN(test->h * 3 / 4 - r_h,  1 << pixdesc->log2_chroma_h);
     p_w = FFALIGN(r_w * 5 / 4, 1 << pixdesc->log2_chroma_w);

     p_h = test->h - w_h - r_h;
 
     for (i = 0; i < 7; i++) {

         draw_bar(test, rainbow[i], x, 0,   r_w, r_h, picref);
         draw_bar(test, wobnair[i], x, r_h, r_w, w_h, picref);

         x += r_w;
     }
     x = 0;

     draw_bar(test, i_pixel, x, r_h + w_h, p_w, p_h, picref);

     x += p_w;

     draw_bar(test, white, x, r_h + w_h, p_w, p_h, picref);

     x += p_w;

     draw_bar(test, q_pixel, x, r_h + w_h, p_w, p_h, picref);

     x += p_w;

     tmp = FFALIGN(5 * r_w - x,  1 << pixdesc->log2_chroma_w);

     draw_bar(test, black, x, r_h + w_h, tmp, p_h, picref);

     x += tmp;
     tmp = FFALIGN(r_w / 3,  1 << pixdesc->log2_chroma_w);

     draw_bar(test, neg4ire, x, r_h + w_h, tmp, p_h, picref);

     x += tmp;

     draw_bar(test, black, x, r_h + w_h, tmp, p_h, picref);

     x += tmp;

     draw_bar(test, pos4ire, x, r_h + w_h, tmp, p_h, picref);

     x += tmp;

     draw_bar(test, black, x, r_h + w_h, test->w - x, p_h, picref);

 }
 

 static av_cold int smptebars_init(AVFilterContext *ctx)

 {
     TestSourceContext *test = ctx->priv;
 
     test->fill_picture_fn = smptebars_fill_picture;
     test->draw_once = 1;

     return init(ctx);

 }
 

 AVFilter avfilter_vsrc_smptebars = {
     .name      = "smptebars",
     .description = NULL_IF_CONFIG_SMALL("Generate SMPTE color bars."),
     .priv_size = sizeof(TestSourceContext),
     .init      = smptebars_init,
     .uninit    = uninit,

     .query_formats = smptebars_query_formats,
     .inputs        = NULL,
     .outputs       = smptebars_outputs,
     .priv_class    = &smptebars_class,
 };
 
 #endif  /* CONFIG_SMPTEBARS_FILTER */
 
 #if CONFIG_SMPTEHDBARS_FILTER
 
 #define smptehdbars_options options
 AVFILTER_DEFINE_CLASS(smptehdbars);
 
 static void smptehdbars_fill_picture(AVFilterContext *ctx, AVFrame *picref)

 {
     TestSourceContext *test = ctx->priv;

     int d_w, r_w, r_h, l_w, i, tmp, x = 0, y = 0;
     const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(picref->format);

     d_w = FFALIGN(test->w / 8, 1 << pixdesc->log2_chroma_w);
     r_h = FFALIGN(test->h * 7 / 12, 1 << pixdesc->log2_chroma_h);
     draw_bar(test, gray40, x, 0, d_w, r_h, picref);
     x += d_w;

     r_w = FFALIGN((((test->w + 3) / 4) * 3) / 7, 1 << pixdesc->log2_chroma_w);
     for (i = 0; i < 7; i++) {
         draw_bar(test, rainbow[i], x, 0, r_w, r_h, picref);
         x += r_w;
     }
     draw_bar(test, gray40, x, 0, test->w - x, r_h, picref);
     y = r_h;
     r_h = FFALIGN(test->h / 12, 1 << pixdesc->log2_chroma_h);
     draw_bar(test, cyan, 0, y, d_w, r_h, picref);
     x = d_w;
     draw_bar(test, i_pixel, x, y, r_w, r_h, picref);
     x += r_w;
     tmp = r_w * 6;
     draw_bar(test, rainbow[0], x, y, tmp, r_h, picref);
     x += tmp;
     l_w = x;
     draw_bar(test, blue, x, y, test->w - x, r_h, picref);
     y += r_h;
     draw_bar(test, yellow, 0, y, d_w, r_h, picref);
     x = d_w;
     draw_bar(test, q_pixel, x, y, r_w, r_h, picref);
     x += r_w;
 
     for (i = 0; i < tmp; i += 1 << pixdesc->log2_chroma_w) {
         uint8_t yramp[4] = {0};
 
         yramp[0] =
         yramp[1] =
         yramp[2] = i * 255 / tmp;
         yramp[3] = 255;
 
         draw_bar(test, yramp, x, y, 1 << pixdesc->log2_chroma_w, r_h, picref);
         x += 1 << pixdesc->log2_chroma_w;
     }
     draw_bar(test, red, x, y, test->w - x, r_h, picref);
     y += r_h;
     draw_bar(test, gray15, 0, y, d_w, test->h - y, picref);
     x = d_w;
     tmp = FFALIGN(r_w * 3 / 2, 1 << pixdesc->log2_chroma_w);
     draw_bar(test, black0, x, y, tmp, test->h - y, picref);
     x += tmp;
     tmp = FFALIGN(r_w * 2, 1 << pixdesc->log2_chroma_w);
     draw_bar(test, white, x, y, tmp, test->h - y, picref);
     x += tmp;
     tmp = FFALIGN(r_w * 5 / 6, 1 << pixdesc->log2_chroma_w);
     draw_bar(test, black0, x, y, tmp, test->h - y, picref);
     x += tmp;
     tmp = FFALIGN(r_w / 3, 1 << pixdesc->log2_chroma_w);
     draw_bar(test,   neg2, x, y, tmp, test->h - y, picref);
     x += tmp;
     draw_bar(test, black0, x, y, tmp, test->h - y, picref);
     x += tmp;
     draw_bar(test, black2, x, y, tmp, test->h - y, picref);
     x += tmp;
     draw_bar(test, black0, x, y, tmp, test->h - y, picref);
     x += tmp;
     draw_bar(test, black4, x, y, tmp, test->h - y, picref);
     x += tmp;
     r_w = l_w - x;
     draw_bar(test, black0, x, y, r_w, test->h - y, picref);
     x += r_w;
     draw_bar(test, gray15, x, y, test->w - x, test->h - y, picref);

 }
 

 static av_cold int smptehdbars_init(AVFilterContext *ctx)
 {
     TestSourceContext *test = ctx->priv;

     test->fill_picture_fn = smptehdbars_fill_picture;
     test->draw_once = 1;
     return init(ctx);
 }
 
 AVFilter avfilter_vsrc_smptehdbars = {
     .name      = "smptehdbars",
     .description = NULL_IF_CONFIG_SMALL("Generate SMPTE HD color bars."),

     .priv_size = sizeof(TestSourceContext),

     .init      = smptehdbars_init,

     .uninit    = uninit,
 
     .query_formats = smptebars_query_formats,

     .inputs        = NULL,
     .outputs       = smptebars_outputs,

     .priv_class    = &smptehdbars_class,

 };
 

 #endif  /* CONFIG_SMPTEHDBARS_FILTER */

 #endif  /* CONFIG_SMPTEBARS_FILTER || CONFIG_SMPTEHDBARS_FILTER */