| /* |
| * Copyright (c) 2015 Ludmila Glinskih |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| /** |
| * Seek test. |
| */ |
| |
| #include "libavutil/adler32.h" |
| #include "libavcodec/avcodec.h" |
| #include "libavformat/avformat.h" |
| #include "libavutil/imgutils.h" |
| |
| int64_t *pts_array; |
| uint32_t *crc_array; |
| int size_of_array; |
| int number_of_elements; |
| |
| static int add_crc_to_array(uint32_t crc, int64_t pts) |
| { |
| if (size_of_array <= number_of_elements) { |
| if (size_of_array == 0) |
| size_of_array = 10; |
| size_of_array *= 2; |
| crc_array = av_realloc_f(crc_array, size_of_array, sizeof(uint32_t)); |
| pts_array = av_realloc_f(pts_array, size_of_array, sizeof(int64_t)); |
| if ((crc_array == NULL) || (pts_array == NULL)) { |
| av_log(NULL, AV_LOG_ERROR, "Can't allocate array to store crcs\n"); |
| return AVERROR(ENOMEM); |
| } |
| } |
| crc_array[number_of_elements] = crc; |
| pts_array[number_of_elements] = pts; |
| number_of_elements++; |
| return 0; |
| } |
| |
| static int compare_crc_in_array(uint32_t crc, int64_t pts) |
| { |
| int i; |
| for (i = 0; i < number_of_elements; i++) { |
| if (pts_array[i] == pts) { |
| if (crc_array[i] == crc) { |
| printf("Comparing 0x%08"PRIx32" %"PRId64" %d is OK\n", crc, pts, i); |
| return 0; |
| } |
| else { |
| av_log(NULL, AV_LOG_ERROR, "Incorrect crc of a frame after seeking\n"); |
| return -1; |
| } |
| } |
| } |
| av_log(NULL, AV_LOG_ERROR, "Incorrect pts of a frame after seeking\n"); |
| return -1; |
| } |
| |
| static int compute_crc_of_packets(AVFormatContext *fmt_ctx, int video_stream, |
| AVCodecContext *ctx, AVFrame *fr, uint64_t ts_start, uint64_t ts_end, int no_seeking) |
| { |
| int number_of_written_bytes; |
| int got_frame = 0; |
| int result; |
| int end_of_stream = 0; |
| int byte_buffer_size; |
| uint8_t *byte_buffer; |
| uint32_t crc; |
| AVPacket pkt; |
| |
| byte_buffer_size = av_image_get_buffer_size(ctx->pix_fmt, ctx->width, ctx->height, 16); |
| byte_buffer = av_malloc(byte_buffer_size); |
| if (!byte_buffer) { |
| av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n"); |
| return AVERROR(ENOMEM); |
| } |
| |
| if (!no_seeking) { |
| result = av_seek_frame(fmt_ctx, video_stream, ts_start, AVSEEK_FLAG_ANY); |
| printf("Seeking to %"PRId64", computing crc for frames with pts < %"PRId64"\n", ts_start, ts_end); |
| if (result < 0) { |
| av_log(NULL, AV_LOG_ERROR, "Error in seeking\n"); |
| return result; |
| } |
| avcodec_flush_buffers(ctx); |
| } |
| |
| av_init_packet(&pkt); |
| do { |
| if (!end_of_stream) |
| if (av_read_frame(fmt_ctx, &pkt) < 0) |
| end_of_stream = 1; |
| if (end_of_stream) { |
| pkt.data = NULL; |
| pkt.size = 0; |
| } |
| if (pkt.stream_index == video_stream || end_of_stream) { |
| got_frame = 0; |
| if ((pkt.pts == AV_NOPTS_VALUE) && (!end_of_stream)) { |
| av_log(NULL, AV_LOG_ERROR, "Error: frames doesn't have pts values\n"); |
| return -1; |
| } |
| result = avcodec_decode_video2(ctx, fr, &got_frame, &pkt); |
| if (result < 0) { |
| av_log(NULL, AV_LOG_ERROR, "Error decoding frame\n"); |
| return result; |
| } |
| if (got_frame) { |
| number_of_written_bytes = av_image_copy_to_buffer(byte_buffer, byte_buffer_size, |
| (const uint8_t* const *)fr->data, (const int*) fr->linesize, |
| ctx->pix_fmt, ctx->width, ctx->height, 1); |
| if (number_of_written_bytes < 0) { |
| av_log(NULL, AV_LOG_ERROR, "Can't copy image to buffer\n"); |
| return number_of_written_bytes; |
| } |
| if ((!no_seeking) && (fr->pts > ts_end)) |
| break; |
| crc = av_adler32_update(0, (const uint8_t*)byte_buffer, number_of_written_bytes); |
| printf("%10"PRId64", 0x%08"PRIx32"\n", fr->pts, crc); |
| if (no_seeking) { |
| if (add_crc_to_array(crc, fr->pts) < 0) |
| return -1; |
| } |
| else { |
| if (compare_crc_in_array(crc, fr->pts) < 0) |
| return -1; |
| } |
| } |
| } |
| av_packet_unref(&pkt); |
| av_init_packet(&pkt); |
| } while ((!end_of_stream || got_frame) && (no_seeking || (fr->pts + fr->pkt_duration <= ts_end))); |
| |
| av_packet_unref(&pkt); |
| av_freep(&byte_buffer); |
| |
| return 0; |
| } |
| |
| static long int read_seek_range(const char *string_with_number) |
| { |
| long int number; |
| char *end_of_string = NULL; |
| number = strtol(string_with_number, &end_of_string, 10); |
| if ((strlen(string_with_number) != end_of_string - string_with_number) || (number < 0)) { |
| av_log(NULL, AV_LOG_ERROR, "Incorrect input ranges of seeking\n"); |
| return -1; |
| } |
| else if ((number == LONG_MAX) || (number == LONG_MIN)) { |
| if (errno == ERANGE) { |
| av_log(NULL, AV_LOG_ERROR, "Incorrect input ranges of seeking\n"); |
| return -1; |
| } |
| } |
| return number; |
| } |
| |
| static int seek_test(const char *input_filename, const char *start, const char *end) |
| { |
| AVCodec *codec = NULL; |
| AVCodecContext *ctx= NULL; |
| AVCodecParameters *origin_par = NULL; |
| AVFrame *fr = NULL; |
| AVFormatContext *fmt_ctx = NULL; |
| int video_stream; |
| int result; |
| int i, j; |
| long int start_ts, end_ts; |
| |
| size_of_array = 0; |
| number_of_elements = 0; |
| crc_array = NULL; |
| pts_array = NULL; |
| |
| result = avformat_open_input(&fmt_ctx, input_filename, NULL, NULL); |
| if (result < 0) { |
| av_log(NULL, AV_LOG_ERROR, "Can't open file\n"); |
| return result; |
| } |
| |
| result = avformat_find_stream_info(fmt_ctx, NULL); |
| if (result < 0) { |
| av_log(NULL, AV_LOG_ERROR, "Can't get stream info\n"); |
| goto end; |
| } |
| |
| start_ts = read_seek_range(start); |
| end_ts = read_seek_range(end); |
| if ((start_ts < 0) || (end_ts < 0)) { |
| result = -1; |
| goto end; |
| } |
| |
| //TODO: add ability to work with audio format |
| video_stream = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0); |
| if (video_stream < 0) { |
| av_log(NULL, AV_LOG_ERROR, "Can't find video stream in input file\n"); |
| result = video_stream; |
| goto end; |
| } |
| |
| origin_par = fmt_ctx->streams[video_stream]->codecpar; |
| |
| codec = avcodec_find_decoder(origin_par->codec_id); |
| if (!codec) { |
| av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n"); |
| result = AVERROR_DECODER_NOT_FOUND; |
| goto end; |
| } |
| |
| ctx = avcodec_alloc_context3(codec); |
| if (!ctx) { |
| av_log(NULL, AV_LOG_ERROR, "Can't allocate decoder context\n"); |
| result = AVERROR(ENOMEM); |
| goto end; |
| } |
| |
| result = avcodec_parameters_to_context(ctx, origin_par); |
| if (result) { |
| av_log(NULL, AV_LOG_ERROR, "Can't copy decoder context\n"); |
| goto end; |
| } |
| |
| result = avcodec_open2(ctx, codec, NULL); |
| if (result < 0) { |
| av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n"); |
| goto end; |
| } |
| |
| fr = av_frame_alloc(); |
| if (!fr) { |
| av_log(NULL, AV_LOG_ERROR, "Can't allocate frame\n"); |
| result = AVERROR(ENOMEM); |
| goto end; |
| } |
| |
| result = compute_crc_of_packets(fmt_ctx, video_stream, ctx, fr, 0, 0, 1); |
| if (result != 0) |
| goto end; |
| |
| for (i = start_ts; i < end_ts; i += 100) { |
| for (j = i + 100; j < end_ts; j += 100) { |
| result = compute_crc_of_packets(fmt_ctx, video_stream, ctx, fr, i, j, 0); |
| if (result != 0) |
| break; |
| } |
| } |
| |
| end: |
| av_freep(&crc_array); |
| av_freep(&pts_array); |
| av_frame_free(&fr); |
| avformat_close_input(&fmt_ctx); |
| avcodec_free_context(&ctx); |
| return result; |
| } |
| |
| int main(int argc, char **argv) |
| { |
| if (argc < 4) { |
| av_log(NULL, AV_LOG_ERROR, "Incorrect input\n"); |
| return 1; |
| } |
| |
| if (seek_test(argv[1], argv[2], argv[3]) != 0) |
| return 1; |
| |
| return 0; |
| } |
