Method dequeue_decoder

framework/codec/Android/mediaCodecDecoder.cpp:394–505

    }

    int mediaCodecDecoder::dequeue_decoder(unique_ptr<IAFFrame> &pFrame) {

        if (!mbInit) {
            return -EAGAIN;
        }

        int ret;
        int index;
        index = mDecoder->dequeueOutputBufferIndex(1000);

        if (index == MC_ERROR) {
            AF_LOGE("dequeue_out occur error. flush state %d", mFlushState);
            return MC_ERROR;
        } else if (index == MC_INFO_TRYAGAIN || index == MC_INFO_OUTPUT_BUFFERS_CHANGED) {
            return -EAGAIN;
        } else if (index == MC_INFO_OUTPUT_FORMAT_CHANGED) {
            mc_out out{};
            mDecoder->getOutput(index, &out, false);

            if (codecType == CODEC_VIDEO) {
                height = out.conf.video.height;

                if (out.conf.video.crop_bottom != MC_ERROR && out.conf.video.crop_top != MC_ERROR) {
                    height = out.conf.video.crop_bottom + 1 - out.conf.video.crop_top;
                }

                width = out.conf.video.width;

                if (out.conf.video.crop_right != MC_ERROR && out.conf.video.crop_left != MC_ERROR) {
                    width = out.conf.video.crop_right + 1 - out.conf.video.crop_left;
                }
            } else if (codecType == CODEC_AUDIO) {
                channel_count = out.conf.audio.channel_count;
                sample_rate = out.conf.audio.sample_rate;
                format = out.conf.audio.format;
            }

            return -EAGAIN;
        } else if (index >= 0) {
            mc_out out{};
            ret = mDecoder->getOutput(index, &out, codecType != CODEC_VIDEO);
            auto item = mDiscardPTSSet.find(out.buf.pts);

            if (item != mDiscardPTSSet.end()) {
                mDecoder->releaseOutputBuffer(index, false);
                mDiscardPTSSet.erase(item);
                return -EAGAIN;
            }

            if (out.b_eos) {
                return STATUS_EOS;
            }

            // AF_LOGD("mediacodec out pts %" PRId64, out.buf.pts);
            if (codecType == CODEC_VIDEO) {
                pFrame = unique_ptr<AFMediaCodecFrame>(
                        new AFMediaCodecFrame(IAFFrame::FrameTypeVideo, index,
                                              [this](int index, bool render) {