/* * 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);    avcodec_close(ctx);    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;    }     av_register_all();     if (seek_test(argv[1], argv[2], argv[3]) != 0)        return 1;     return 0;}