Function ff_decode_get_packet

libavcodec/decode.c:251–281

}

int ff_decode_get_packet(AVCodecContext *avctx, AVPacket *pkt)
{
    AVCodecInternal *avci = avctx->internal;
    DecodeContext     *dc = decode_ctx(avci);

    if (avci->draining)
        return AVERROR_EOF;

    /* If we are a worker thread, get the next packet from the threading
     * context. Otherwise we are the main (user-facing) context, so we get the
     * next packet from the input filterchain.
     */
    if (avctx->internal->is_frame_mt)
        return ff_thread_get_packet(avctx, pkt);

    while (1) {
        int ret = decode_get_packet(avctx, pkt);
        if (ret == AVERROR(EAGAIN) &&
            (!AVPACKET_IS_EMPTY(avci->buffer_pkt) || dc->draining_started)) {
            ret = av_bsf_send_packet(avci->bsf, avci->buffer_pkt);
            if (ret >= 0)
                continue;

            av_packet_unref(avci->buffer_pkt);
        }

        if (ret == AVERROR_EOF)
            avci->draining = 1;
        return ret;
    }
}

/**
 * Attempt to guess proper monotonic timestamps for decoded video frames