Function compute_crc_of_packets

tests/api/api-seek-test.c:76–166

}

static int compute_crc_of_packets(AVFormatContext *fmt_ctx, int video_stream,
                                AVCodecContext *ctx, AVPacket *pkt, AVFrame *fr,
                                uint64_t ts_start, uint64_t ts_end, int no_seeking)
{
    int number_of_written_bytes;
    int result;
    int byte_buffer_size;
    uint8_t *byte_buffer;
    uint32_t crc;

    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);
    }

    do {
        result = av_read_frame(fmt_ctx, pkt);
        if (result >= 0 && pkt->stream_index != video_stream) {
            av_packet_unref(pkt);
            continue;
        }

        if (result < 0)
            result = avcodec_send_packet(ctx, NULL);
        else {
            if (pkt->pts == AV_NOPTS_VALUE) {
                av_log(NULL, AV_LOG_ERROR, "Error: frames doesn't have pts values\n");
                return -1;
            }
            result = avcodec_send_packet(ctx, pkt);
        }

        av_packet_unref(pkt);

        if (result < 0) {
            av_log(NULL, AV_LOG_ERROR, "Error submitting a packet for decoding\n");
            return result;
        }

        while (result >= 0) {
            result = avcodec_receive_frame(ctx, fr);
            if (result == AVERROR_EOF)
                goto finish;
            else if (result == AVERROR(EAGAIN)) {
                result = 0;
                break;