tests/api/api-band-test.c

   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 "libavutil/mem.h"
  29 #include "libavcodec/avcodec.h"
  30 #include "libavformat/avformat.h"
  31 #include "libavutil/imgutils.h"
  32
  33 uint8_t *slice_byte_buffer;
  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     const AVCodec *codec = NULL;
  70     AVCodecContext *ctx= NULL;
  71     AVCodecParameters *origin_par = NULL;
  72     uint8_t *byte_buffer = NULL;
  73     AVFrame *fr = NULL;
  74     AVPacket *pkt;
  75     AVFormatContext *fmt_ctx = NULL;
  76     int number_of_written_bytes;
  77     int video_stream;
  78     int byte_buffer_size;
  79     int result;
  80
  81     draw_horiz_band_called = 0;
  82
  83     result = avformat_open_input(&fmt_ctx, input_filename, NULL, NULL);
  84     if (result < 0) {
  85         av_log(NULL, AV_LOG_ERROR, "Can't open file\n");
  86         return result;
  87     }
  88
  89     result = avformat_find_stream_info(fmt_ctx, NULL);
  90     if (result < 0) {
  91         av_log(NULL, AV_LOG_ERROR, "Can't get stream info\n");
  92         return result;
  93     }
  94
  95     video_stream = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
  96     if (video_stream < 0) {
  97       av_log(NULL, AV_LOG_ERROR, "Can't find video stream in input file\n");
  98       return -1;
  99     }
 100
 101     origin_par = fmt_ctx->streams[video_stream]->codecpar;
 102
 103     codec = avcodec_find_decoder(origin_par->codec_id);
 104     if (!codec) {
 105         av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n");
 106         return -1;
 107     }
 108
 109     if (!(codec->capabilities & AV_CODEC_CAP_DRAW_HORIZ_BAND)) {
 110         av_log(NULL, AV_LOG_ERROR, "Codec does not support draw_horiz_band\n");
 111         return -1;
 112     }
 113
 114     ctx = avcodec_alloc_context3(codec);
 115     if (!ctx) {
 116         av_log(NULL, AV_LOG_ERROR, "Can't allocate decoder context\n");
 117         return AVERROR(ENOMEM);
 118     }
 119
 120     result = avcodec_parameters_to_context(ctx, origin_par);
 121     if (result) {
 122         av_log(NULL, AV_LOG_ERROR, "Can't copy decoder context\n");
 123         return result;
 124     }
 125
 126     ctx->draw_horiz_band = draw_horiz_band;
 127     ctx->thread_count = 1;
 128
 129     result = avcodec_open2(ctx, codec, NULL);
 130     if (result < 0) {
 131         av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n");
 132         return result;
 133     }
 134
 135     fr = av_frame_alloc();
 136     if (!fr) {
 137         av_log(NULL, AV_LOG_ERROR, "Can't allocate frame\n");
 138         return AVERROR(ENOMEM);
 139     }
 140
 141     pkt = av_packet_alloc();
 142     if (!pkt) {
 143         av_log(NULL, AV_LOG_ERROR, "Cannot allocate packet\n");
 144         return AVERROR(ENOMEM);
 145     }
 146
 147     byte_buffer_size = av_image_get_buffer_size(ctx->pix_fmt, ctx->width, ctx->height, 32);
 148     byte_buffer = av_malloc(byte_buffer_size);
 149     if (!byte_buffer) {
 150         av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");
 151         return AVERROR(ENOMEM);
 152     }
 153
 154     slice_byte_buffer = av_malloc(byte_buffer_size);
 155     if (!slice_byte_buffer) {
 156         av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");
 157         return AVERROR(ENOMEM);
 158     }
 159     memset(slice_byte_buffer, 0, byte_buffer_size);
 160
 161     result = 0;
 162     while (result >= 0) {
 163         result = av_read_frame(fmt_ctx, pkt);
 164         if (result >= 0 && pkt->stream_index != video_stream) {
 165             av_packet_unref(pkt);
 166             continue;
 167         }
 168
 169         // pkt will be empty on read error/EOF
 170         result = avcodec_send_packet(ctx, pkt);
 171
 172         av_packet_unref(pkt);
 173
 174         if (result < 0) {
 175             av_log(NULL, AV_LOG_ERROR, "Error submitting a packet for decoding\n");
 176             return result;
 177         }
 178
 179         while (result >= 0) {
 180             result = avcodec_receive_frame(ctx, fr);
 181             if (result == AVERROR_EOF)
 182                 goto finish;
 183             else if (result == AVERROR(EAGAIN)) {
 184                 result = 0;
 185                 break;
 186             } else if (result < 0) {
 187                 av_log(NULL, AV_LOG_ERROR, "Error decoding frame\n");
 188                 return result;
 189             }
 190
 191             number_of_written_bytes = av_image_copy_to_buffer(byte_buffer, byte_buffer_size,
 192                                     (const uint8_t* const *)fr->data, (const int*) fr->linesize,
 193                                     ctx->pix_fmt, ctx->width, ctx->height, 1);
 194             if (number_of_written_bytes < 0) {
 195                 av_log(NULL, AV_LOG_ERROR, "Can't copy image to buffer\n");
 196                 return number_of_written_bytes;
 197             }
 198             if (draw_horiz_band_called == 0) {
 199                 av_log(NULL, AV_LOG_ERROR, "draw_horiz_band haven't been called!\n");
 200                 return -1;
 201             }
 202             if (av_adler32_update(0, (const uint8_t*)byte_buffer, number_of_written_bytes) !=
 203                 av_adler32_update(0, (const uint8_t*)slice_byte_buffer, number_of_written_bytes)) {
 204                 av_log(NULL, AV_LOG_ERROR, "Decoded frames with and without draw_horiz_band are not the same!\n");
 205                 return -1;
 206             }
 207             av_frame_unref(fr);
 208         }
 209     }
 210
 211 finish:
 212     av_packet_free(&pkt);
 213     av_frame_free(&fr);
 214     avformat_close_input(&fmt_ctx);
 215     avcodec_free_context(&ctx);
 216     av_freep(&byte_buffer);
 217     av_freep(&slice_byte_buffer);
 218     return 0;
 219 }
 220
 221 int main(int argc, char **argv)
 222 {
 223     if (argc < 2)
 224     {
 225         av_log(NULL, AV_LOG_ERROR, "Incorrect input: expected %s <name of a video file>\n", argv[0]);
 226         return 1;
 227     }
 228
 229     if (video_decode(argv[1]) != 0)
 230         return 1;
 231
 232     return 0;
 233 }