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