tests/api/api-seek-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  * Seek 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 int64_t *pts_array;
  34 uint32_t *crc_array;
  35 int size_of_array;
  36 int number_of_elements;
  37
  38 static int add_crc_to_array(uint32_t crc, int64_t pts)
  39 {
  40     if (size_of_array <= number_of_elements) {
  41         if (size_of_array == 0)
  42             size_of_array = 10;
  43         size_of_array *= 2;
  44         crc_array = av_realloc_f(crc_array, size_of_array, sizeof(uint32_t));
  45         pts_array = av_realloc_f(pts_array, size_of_array, sizeof(int64_t));
  46         if ((crc_array == NULL) || (pts_array == NULL)) {
  47             av_log(NULL, AV_LOG_ERROR, "Can't allocate array to store crcs\n");
  48             return AVERROR(ENOMEM);
  49         }
  50     }
  51     crc_array[number_of_elements] = crc;
  52     pts_array[number_of_elements] = pts;
  53     number_of_elements++;
  54     return 0;
  55 }
  56
  57 static int compare_crc_in_array(uint32_t crc, int64_t pts)
  58 {
  59     int i;
  60     for (i = 0; i < number_of_elements; i++) {
  61         if (pts_array[i] == pts) {
  62             if (crc_array[i] == crc) {
  63                 printf("Comparing 0x%08"PRIx32" %"PRId64" %d is OK\n", crc, pts, i);
  64                 return 0;
  65             }
  66             else {
  67                 av_log(NULL, AV_LOG_ERROR, "Incorrect crc of a frame after seeking\n");
  68                 return -1;
  69             }
  70         }
  71     }
  72     av_log(NULL, AV_LOG_ERROR, "Incorrect pts of a frame after seeking\n");
  73     return -1;
  74 }
  75
  76 static int compute_crc_of_packets(AVFormatContext *fmt_ctx, int video_stream,
  77                                 AVCodecContext *ctx, AVPacket *pkt, AVFrame *fr,
  78                                 uint64_t ts_start, uint64_t ts_end, int no_seeking)
  79 {
  80     int number_of_written_bytes;
  81     int result;
  82     int byte_buffer_size;
  83     uint8_t *byte_buffer;
  84     uint32_t crc;
  85
  86     byte_buffer_size = av_image_get_buffer_size(ctx->pix_fmt, ctx->width, ctx->height, 16);
  87     byte_buffer = av_malloc(byte_buffer_size);
  88     if (!byte_buffer) {
  89         av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n");
  90         return AVERROR(ENOMEM);
  91     }
  92
  93     if (!no_seeking) {
  94         result = av_seek_frame(fmt_ctx, video_stream, ts_start, AVSEEK_FLAG_ANY);
  95         printf("Seeking to %"PRId64", computing crc for frames with pts < %"PRId64"\n", ts_start, ts_end);
  96         if (result < 0) {
  97             av_log(NULL, AV_LOG_ERROR, "Error in seeking\n");
  98             return result;
  99         }
 100         avcodec_flush_buffers(ctx);
 101     }
 102
 103     do {
 104         result = av_read_frame(fmt_ctx, pkt);
 105         if (result >= 0 && pkt->stream_index != video_stream) {
 106             av_packet_unref(pkt);
 107             continue;
 108         }
 109
 110         if (result < 0)
 111             result = avcodec_send_packet(ctx, NULL);
 112         else {
 113             if (pkt->pts == AV_NOPTS_VALUE) {
 114                 av_log(NULL, AV_LOG_ERROR, "Error: frames doesn't have pts values\n");
 115                 return -1;
 116             }
 117             result = avcodec_send_packet(ctx, pkt);
 118         }
 119
 120         av_packet_unref(pkt);
 121
 122         if (result < 0) {
 123             av_log(NULL, AV_LOG_ERROR, "Error submitting a packet for decoding\n");
 124             return result;
 125         }
 126
 127         while (result >= 0) {
 128             result = avcodec_receive_frame(ctx, fr);
 129             if (result == AVERROR_EOF)
 130                 goto finish;
 131             else if (result == AVERROR(EAGAIN)) {
 132                 result = 0;
 133                 break;
 134             } else if (result < 0) {
 135                 av_log(NULL, AV_LOG_ERROR, "Error decoding frame\n");
 136                 return result;
 137             }
 138
 139             number_of_written_bytes = av_image_copy_to_buffer(byte_buffer, byte_buffer_size,
 140                                     (const uint8_t* const *)fr->data, (const int*) fr->linesize,
 141                                     ctx->pix_fmt, ctx->width, ctx->height, 1);
 142             if (number_of_written_bytes < 0) {
 143                 av_log(NULL, AV_LOG_ERROR, "Can't copy image to buffer\n");
 144                 return number_of_written_bytes;
 145             }
 146             if ((!no_seeking) && (fr->pts > ts_end))
 147                 break;
 148             crc = av_adler32_update(0, (const uint8_t*)byte_buffer, number_of_written_bytes);
 149             printf("%10"PRId64", 0x%08"PRIx32"\n", fr->pts, crc);
 150             if (no_seeking) {
 151                 if (add_crc_to_array(crc, fr->pts) < 0)
 152                     return -1;
 153             }
 154             else {
 155                 if (compare_crc_in_array(crc, fr->pts) < 0)
 156                     return -1;
 157             }
 158             av_frame_unref(fr);
 159         }
 160     } while (result >= 0 && (no_seeking || (fr->pts + fr->duration <= ts_end)));
 161
 162 finish:
 163     av_freep(&byte_buffer);
 164
 165     return 0;
 166 }
 167
 168 static long int read_seek_range(const char *string_with_number)
 169 {
 170     long int number;
 171     char *end_of_string = NULL;
 172     number = strtol(string_with_number, &end_of_string, 10);
 173     if ((strlen(string_with_number) != end_of_string - string_with_number)  || (number < 0)) {
 174         av_log(NULL, AV_LOG_ERROR, "Incorrect input ranges of seeking\n");
 175         return -1;
 176     }
 177     else if ((number == LONG_MAX) || (number == LONG_MIN)) {
 178         if (errno == ERANGE) {
 179             av_log(NULL, AV_LOG_ERROR, "Incorrect input ranges of seeking\n");
 180             return -1;
 181         }
 182     }
 183     return number;
 184 }
 185
 186 static int seek_test(const char *input_filename, const char *start, const char *end)
 187 {
 188     const AVCodec *codec = NULL;
 189     AVCodecContext *ctx= NULL;
 190     AVCodecParameters *origin_par = NULL;
 191     AVPacket *pkt = NULL;
 192     AVFrame *fr = NULL;
 193     AVFormatContext *fmt_ctx = NULL;
 194     int video_stream;
 195     int result;
 196     int i, j;
 197     long int start_ts, end_ts;
 198
 199     size_of_array = 0;
 200     number_of_elements = 0;
 201     crc_array = NULL;
 202     pts_array = NULL;
 203
 204     result = avformat_open_input(&fmt_ctx, input_filename, NULL, NULL);
 205     if (result < 0) {
 206         av_log(NULL, AV_LOG_ERROR, "Can't open file\n");
 207         return result;
 208     }
 209
 210     result = avformat_find_stream_info(fmt_ctx, NULL);
 211     if (result < 0) {
 212         av_log(NULL, AV_LOG_ERROR, "Can't get stream info\n");
 213         goto end;
 214     }
 215
 216     start_ts = read_seek_range(start);
 217     end_ts = read_seek_range(end);
 218     if ((start_ts < 0) || (end_ts < 0)) {
 219         result = -1;
 220         goto end;
 221     }
 222
 223     //TODO: add ability to work with audio format
 224     video_stream = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
 225     if (video_stream < 0) {
 226       av_log(NULL, AV_LOG_ERROR, "Can't find video stream in input file\n");
 227       result = video_stream;
 228       goto end;
 229     }
 230
 231     origin_par = fmt_ctx->streams[video_stream]->codecpar;
 232
 233     codec = avcodec_find_decoder(origin_par->codec_id);
 234     if (!codec) {
 235         av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n");
 236         result = AVERROR_DECODER_NOT_FOUND;
 237         goto end;
 238     }
 239
 240     ctx = avcodec_alloc_context3(codec);
 241     if (!ctx) {
 242         av_log(NULL, AV_LOG_ERROR, "Can't allocate decoder context\n");
 243         result = AVERROR(ENOMEM);
 244         goto end;
 245     }
 246
 247     result = avcodec_parameters_to_context(ctx, origin_par);
 248     if (result) {
 249         av_log(NULL, AV_LOG_ERROR, "Can't copy decoder context\n");
 250         goto end;
 251     }
 252
 253     result = avcodec_open2(ctx, codec, NULL);
 254     if (result < 0) {
 255         av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n");
 256         goto end;
 257     }
 258
 259     fr = av_frame_alloc();
 260     if (!fr) {
 261         av_log(NULL, AV_LOG_ERROR, "Can't allocate frame\n");
 262         result = AVERROR(ENOMEM);
 263         goto end;
 264     }
 265
 266     pkt = av_packet_alloc();
 267     if (!pkt) {
 268         av_log(NULL, AV_LOG_ERROR, "Cannot allocate packet\n");
 269         result = AVERROR(ENOMEM);
 270         goto end;
 271     }
 272
 273     result = compute_crc_of_packets(fmt_ctx, video_stream, ctx, pkt, fr, 0, 0, 1);
 274     if (result != 0)
 275         goto end;
 276
 277     for (i = start_ts; i < end_ts; i += 100) {
 278         for (j = i + 100; j < end_ts; j += 100) {
 279             result = compute_crc_of_packets(fmt_ctx, video_stream, ctx, pkt, fr, i, j, 0);
 280             if (result != 0)
 281                 break;
 282         }
 283     }
 284
 285 end:
 286     av_freep(&crc_array);
 287     av_freep(&pts_array);
 288     av_packet_free(&pkt);
 289     av_frame_free(&fr);
 290     avformat_close_input(&fmt_ctx);
 291     avcodec_free_context(&ctx);
 292     return result;
 293 }
 294
 295 int main(int argc, char **argv)
 296 {
 297     if (argc < 4) {
 298         av_log(NULL, AV_LOG_ERROR, "Incorrect input\n");
 299         return 1;
 300     }
 301
 302     if (seek_test(argv[1], argv[2], argv[3]) != 0)
 303         return 1;
 304
 305     return 0;
 306 }