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  1. /*
  2.  * Copyright (c) 2015 Ludmila Glinskih
  3.  *
  4.  * Permission is hereby granted, free of charge, to any person obtaining a copy
  5.  * of this software and associated documentation files (the "Software"), to deal
  6.  * in the Software without restriction, including without limitation the rights
  7.  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  8.  * copies of the Software, and to permit persons to whom the Software is
  9.  * furnished to do so, subject to the following conditions:
  10.  *
  11.  * The above copyright notice and this permission notice shall be included in
  12.  * all copies or substantial portions of the Software.
  13.  *
  14.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15.  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16.  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  17.  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18.  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  19.  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  20.  * THE SOFTWARE.
  21.  */
  22.  
  23. /**
  24.  * draw_horiz_band test.
  25.  */
  26.  
  27. #include "libavutil/adler32.h"
  28. #include "libavcodec/avcodec.h"
  29. #include "libavformat/avformat.h"
  30. #include "libavutil/imgutils.h"
  31.  
  32. uint8_t *slice_byte_buffer;
  33. uint8_t slice_byte_buffer_size;
  34. int draw_horiz_band_called;
  35.  
  36. static void draw_horiz_band(AVCodecContext *ctx, const AVFrame *fr, int offset[4],
  37.                             int slice_position, int type, int height)
  38. {
  39.     int i;
  40.     const AVPixFmtDescriptor *pix_fmt_desc;
  41.     int chroma_w, chroma_h;
  42.     int shift_slice_position;
  43.     int shift_height;
  44.  
  45.     draw_horiz_band_called = 1;
  46.  
  47.     pix_fmt_desc = av_pix_fmt_desc_get(ctx->pix_fmt);
  48.     chroma_w = -((-ctx->width) >> pix_fmt_desc->log2_chroma_w);
  49.     chroma_h = -((-height) >> pix_fmt_desc->log2_chroma_h);
  50.     shift_slice_position = -((-slice_position) >> pix_fmt_desc->log2_chroma_h);
  51.     shift_height = -((-ctx->height) >> pix_fmt_desc->log2_chroma_h);
  52.  
  53.     for (i = 0; i < height; i++) {
  54.         memcpy(slice_byte_buffer + ctx->width * slice_position + i * ctx->width,
  55.                fr->data[0] + offset[0] + i * fr->linesize[0], ctx->width);
  56.     }
  57.     for (i = 0; i < chroma_h; i++) {
  58.         memcpy(slice_byte_buffer + ctx->width * ctx->height + chroma_w * shift_slice_position + i * chroma_w,
  59.                fr->data[1] + offset[1] + i * fr->linesize[1], chroma_w);
  60.     }
  61.     for (i = 0; i < chroma_h; i++) {
  62.         memcpy(slice_byte_buffer + ctx->width * ctx->height + chroma_w * shift_height + chroma_w * shift_slice_position + i * chroma_w,
  63.                fr->data[2] + offset[2] + i * fr->linesize[2], chroma_w);
  64.     }
  65. }
  66.  
  67. static int video_decode(const char *input_filename)
  68. {
  69.     AVCodec *codec = NULL;
  70.     AVCodecContext *origin_ctx = NULL, *ctx= NULL;
  71.     uint8_t *byte_buffer = NULL;
  72.     AVFrame *fr = NULL;
  73.     AVPacket pkt;
  74.     AVFormatContext *fmt_ctx = NULL;
  75.     int number_of_written_bytes;
  76.     int video_stream;
  77.     int got_frame = 0;
  78.     int byte_buffer_size;
  79.     int result;
  80.     int end_of_stream = 0;
  81.  
  82.     draw_horiz_band_called = 0;
  83.  
  84.     result = avformat_open_input(&fmt_ctx, input_filename, NULL, NULL);
  85.     if (result < 0) {
  86.         av_log(NULL, AV_LOG_ERROR, "Can't open file\n");
  87.         return result;
  88.     }
  89.  
  90.     result = avformat_find_stream_info(fmt_ctx, NULL);
  91.     if (result < 0) {
  92.         av_log(NULL, AV_LOG_ERROR, "Can't get stream info\n");
  93.         return result;
  94.     }
  95.  
  96.     video_stream = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
  97.     if (video_stream < 0) {
  98.       av_log(NULL, AV_LOG_ERROR, "Can't find video stream in input file\n");
  99.       return -1;
  100.     }
  101.  
  102.     origin_ctx = fmt_ctx->streams[video_stream]->codec;
  103.  
  104.     codec = avcodec_find_decoder(origin_ctx->codec_id);
  105.     if (!codec) {
  106.         av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n");
  107.         return -1;
  108.     }
  109.  
  110.     ctx = avcodec_alloc_context3(codec);
  111.     if (!ctx) {
  112.         av_log(NULL, AV_LOG_ERROR, "Can't allocate decoder context\n");
  113.         return AVERROR(ENOMEM);
  114.     }
  115.  
  116.     result = avcodec_copy_context(ctx, origin_ctx);
  117.     if (result) {
  118.         av_log(NULL, AV_LOG_ERROR, "Can't copy decoder context\n");
  119.         return result;
  120.     }
  121.  
  122.     ctx->draw_horiz_band = draw_horiz_band;
  123.     ctx->thread_count = 1;
  124.  
  125.     result = avcodec_open2(ctx, codec, NULL);
  126.     if (result < 0) {
  127.         av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n");
  128.         return result;
  129.     }
  130.  
  131.     fr = av_frame_alloc();
  132.     if (!fr) {
  133.         av_log(NULL, AV_LOG_ERROR, "Can't allocate frame\n");
  134.         return AVERROR(ENOMEM);
  135.     }
  136.  
  137.     if (strcmp(codec->name, "flv") && strcmp(codec->name, "mpeg4") && strcmp(codec->name, "huffyuv")) {
  138.         av_log(NULL, AV_LOG_ERROR, "Wrong codec\n");
  139.         return -1;
  140.     }
  141.  
  142.     byte_buffer_size = av_image_get_buffer_size(ctx->pix_fmt, ctx->width, ctx->height, 32);
  143.     byte_buffer = av_malloc(byte_buffer_size);
  144.     if (!byte_buffer) {
  145.         av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");
  146.         return AVERROR(ENOMEM);
  147.     }
  148.  
  149.     slice_byte_buffer = av_malloc(byte_buffer_size);
  150.     if (!slice_byte_buffer) {
  151.         av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");
  152.         return AVERROR(ENOMEM);
  153.     }
  154.     memset(slice_byte_buffer, 0, byte_buffer_size);
  155.     slice_byte_buffer_size = byte_buffer_size;
  156.  
  157.     av_init_packet(&pkt);
  158.     do {
  159.         if (!end_of_stream) {
  160.             if (av_read_frame(fmt_ctx, &pkt) < 0) {
  161.                 end_of_stream = 1;
  162.             }
  163.         }
  164.         if (end_of_stream) {
  165.             pkt.data = NULL;
  166.             pkt.size = 0;
  167.         }
  168.         if (pkt.stream_index == video_stream || end_of_stream) {
  169.             got_frame = 0;
  170.             result = avcodec_decode_video2(ctx, fr, &got_frame, &pkt);
  171.             if (result < 0) {
  172.                 av_log(NULL, AV_LOG_ERROR, "Error decoding frame\n");
  173.                 return result;
  174.             }
  175.             if (got_frame) {
  176.                 number_of_written_bytes = av_image_copy_to_buffer(byte_buffer, byte_buffer_size,
  177.                                         (const uint8_t* const *)fr->data, (const int*) fr->linesize,
  178.                                         ctx->pix_fmt, ctx->width, ctx->height, 1);
  179.                 if (number_of_written_bytes < 0) {
  180.                     av_log(NULL, AV_LOG_ERROR, "Can't copy image to buffer\n");
  181.                     return number_of_written_bytes;
  182.                 }
  183.                 if (draw_horiz_band_called == 0) {
  184.                     av_log(NULL, AV_LOG_ERROR, "draw_horiz_band haven't been called!\n");
  185.                     return -1;
  186.                 }
  187.                 if (av_adler32_update(0, (const uint8_t*)byte_buffer, number_of_written_bytes) !=
  188.                     av_adler32_update(0, (const uint8_t*)slice_byte_buffer, number_of_written_bytes)) {
  189.                     av_log(NULL, AV_LOG_ERROR, "Decoded frames with and without draw_horiz_band are not the same!\n");
  190.                     return -1;
  191.                 }
  192.             }
  193.             av_free_packet(&pkt);
  194.             av_init_packet(&pkt);
  195.         }
  196.     } while (!end_of_stream || got_frame);
  197.  
  198.     av_free_packet(&pkt);
  199.     av_frame_free(&fr);
  200.     avcodec_close(ctx);
  201.     avformat_close_input(&fmt_ctx);
  202.     avcodec_free_context(&ctx);
  203.     av_freep(&byte_buffer);
  204.     av_freep(&slice_byte_buffer);
  205.     return 0;
  206. }
  207.  
  208. int main(int argc, char **argv)
  209. {
  210.     if (argc < 2)
  211.     {
  212.         av_log(NULL, AV_LOG_ERROR, "Incorrect input: expected %s <name of a video file>\nNote that test works only for huffyuv, flv and mpeg4 decoders\n", argv[0]);
  213.         return 1;
  214.     }
  215.  
  216.     av_register_all();
  217.  
  218.     if (video_decode(argv[1]) != 0)
  219.         return 1;
  220.  
  221.     return 0;
  222. }
  223.