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- /*
- * 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;
- int64_t *crc_array;
- int size_of_array;
- int number_of_elements;
- static int add_crc_to_array(int64_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(crc_array, size_of_array * sizeof(int64_t));
- pts_array = av_realloc(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(int64_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%08lx %"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;
- int64_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 ((fr->pkt_pts > ts_end) && (!no_seeking))
- break;
- crc = av_adler32_update(0, (const uint8_t*)byte_buffer, number_of_written_bytes);
- printf("%10"PRId64", 0x%08lx\n", fr->pkt_pts, crc);
- if (no_seeking) {
- if (add_crc_to_array(crc, fr->pkt_pts) < 0)
- return -1;
- }
- else {
- if (compare_crc_in_array(crc, fr->pkt_pts) < 0)
- return -1;
- }
- }
- }
- av_packet_unref(&pkt);
- av_init_packet(&pkt);
- } while ((!end_of_stream || got_frame) && (no_seeking || (fr->pkt_pts + av_frame_get_pkt_duration(fr) <= 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 = 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");
- return result;
- }
- start_ts = read_seek_range(start);
- end_ts = read_seek_range(end);
- if ((start_ts < 0) || (end_ts < 0))
- return -1;
- //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");
- return -1;
- }
- 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");
- return -1;
- }
- ctx = avcodec_alloc_context3(codec);
- if (!ctx) {
- av_log(NULL, AV_LOG_ERROR, "Can't allocate decoder context\n");
- return AVERROR(ENOMEM);
- }
- result = avcodec_parameters_to_context(ctx, origin_par);
- if (result) {
- av_log(NULL, AV_LOG_ERROR, "Can't copy decoder context\n");
- return result;
- }
- result = avcodec_open2(ctx, codec, NULL);
- if (result < 0) {
- av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n");
- return result;
- }
- fr = av_frame_alloc();
- if (!fr) {
- av_log(NULL, AV_LOG_ERROR, "Can't allocate frame\n");
- return AVERROR(ENOMEM);
- }
- result = compute_crc_of_packets(fmt_ctx, video_stream, ctx, fr, i, j, 1);
- if (result != 0)
- return -1;
- 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)
- return -1;
- }
- av_freep(&crc_array);
- av_freep(&pts_array);
- av_frame_free(&fr);
- avcodec_close(ctx);
- avformat_close_input(&fmt_ctx);
- avcodec_free_context(&ctx);
- return 0;
- }
- int main(int argc, char **argv)
- {
- if (argc < 4) {
- av_log(NULL, AV_LOG_ERROR, "Incorrect input\n");
- return 1;
- }
- av_register_all();
- if (seek_test(argv[1], argv[2], argv[3]) != 0)
- return 1;
- return 0;
- }
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