C++ SrsSharedPtrMessage::is_video方法代码示例

int SrsGopCache::cache(SrsSharedPtrMessage* __msg)
{
    int ret = ERROR_SUCCESS;
    
    if (!enable_gop_cache) {
        srs_verbose("gop cache is disabled.");
        return ret;
    }

    // the gop cache know when to gop it.
    SrsSharedPtrMessage* msg = __msg;

    // disable gop cache when not h.264
    if (!SrsFlvCodec::video_is_h264(msg->payload, msg->size)) {
        srs_info("gop donot cache video for none h.264");
        return ret;
    }
    
    // got video, update the video count if acceptable
    if (msg->is_video()) {
        cached_video_count++;
        audio_after_last_video_count = 0;
    }
    
    // no acceptable video or pure audio, disable the cache.
    if (pure_audio()) {
        srs_verbose("ignore any frame util got a h264 video frame.");
        return ret;
    }
    
    // ok, gop cache enabled, and got an audio.
    if (msg->is_audio()) {
        audio_after_last_video_count++;
    }
    
    // clear gop cache when pure audio count overflow
    if (audio_after_last_video_count > __SRS_PURE_AUDIO_GUESS_COUNT) {
        srs_warn("clear gop cache for guess pure audio overflow");
        clear();
        return ret;
    }
    
    // clear gop cache when got key frame
    if (msg->is_video() && SrsFlvCodec::video_is_keyframe(msg->payload, msg->size)) {
        srs_info("clear gop cache when got keyframe. vcount=%d, count=%d",
            cached_video_count, (int)gop_cache.size());
            
        clear();
        
        // curent msg is video frame, so we set to 1.
        cached_video_count = 1;
    }
    
    // cache the frame.
    gop_cache.push_back(msg->copy());
    
    return ret;
}

void SrsMessageQueue::shrink()
{
    int iframe_index = -1;
    
    // issue the first iframe.
    // skip the first frame, whatever the type of it,
    // for when we shrinked, the first is the iframe,
    // we will directly remove the gop next time.
    for (int i = 1; i < (int)msgs.size(); i++) {
        SrsSharedPtrMessage* msg = msgs.at(i);
        
        if (msg->is_video()) {
            if (SrsFlvCodec::video_is_keyframe(msg->payload, msg->size)) {
                // the max frame index to remove.
                iframe_index = i;
                
                // set the start time, we will remove until this frame.
                av_start_time = msg->timestamp;
                
                break;
            }
        }
    }
    
    // no iframe, for audio, clear the queue.
    // it is ok to clear for audio, for the shrink tell us the queue is full.
    // for video, we clear util the I-Frame, for the decoding must start from I-frame,
    // for audio, it's ok to clear any data, also we can clear the whole queue.
    // @see: https://github.com/winlinvip/simple-rtmp-server/issues/134
    if (iframe_index < 0) {
        clear();
        return;
    }
    
    srs_trace("shrink the cache queue, size=%d, removed=%d, max=%.2f", 
        (int)msgs.size(), iframe_index, queue_size_ms / 1000.0);
    
    // remove the first gop from the front
    for (int i = 0; i < iframe_index; i++) {
        SrsSharedPtrMessage* msg = msgs.at(i);
        srs_freep(msg);
    }
    msgs.erase(msgs.begin(), msgs.begin() + iframe_index);
}

int SrsLiveStream::streaming_send_messages(ISrsBufferEncoder* enc, SrsSharedPtrMessage** msgs, int nb_msgs)
{
    int ret = ERROR_SUCCESS;
    
    for (int i = 0; i < nb_msgs; i++) {
        SrsSharedPtrMessage* msg = msgs[i];
        
        if (msg->is_audio()) {
            ret = enc->write_audio(msg->timestamp, msg->payload, msg->size);
        } else if (msg->is_video()) {
            ret = enc->write_video(msg->timestamp, msg->payload, msg->size);
        } else {
            ret = enc->write_metadata(msg->timestamp, msg->payload, msg->size);
        }
        
        if (ret != ERROR_SUCCESS) {
            return ret;
        }
    }
    
    return ret;
}