void QVideoDecoder::timerEvent(QTimerEvent * te)
{
if(te->timerId() == m_decode_timer)
{
if(g_packet_queue.audio_packets.count() < 100 || g_packet_queue.video_packets.count() < 100)
{
readFrame();
}
else
{
if(g_packet_queue.video_packets.count() > 1)
{
decodeVideoFrame();
}
}
}
}
void MovieDecoder::getScaledVideoFrame(int scaledSize, bool maintainAspectRatio, VideoFrame& videoFrame)
{
initializeFilterGraph(m_pFormatContext->streams[m_VideoStream]->time_base, scaledSize, maintainAspectRatio);
auto del = [] (AVFrame* f) { av_frame_free(&f); };
std::unique_ptr<AVFrame, decltype(del)> res(av_frame_alloc(), del);
checkRc(av_buffersrc_write_frame(m_pFilterSource, m_pFrame), "Failed to write frame to filter graph");
int attempts = 0;
int rc = av_buffersink_get_frame(m_pFilterSink, res.get());
while (rc == AVERROR(EAGAIN) && attempts++ < 10)
{
decodeVideoFrame();
checkRc(av_buffersrc_write_frame(m_pFilterSource, m_pFrame), "Failed to write frame to filter graph");
rc = av_buffersink_get_frame(m_pFilterSink, res.get());
}
checkRc(rc, "Failed to get buffer from filter");
videoFrame.width = res->width;
videoFrame.height = res->height;
videoFrame.lineSize = videoFrame.width * 4;
if(videoFrame.frameData != nullptr)
delete videoFrame.frameData;
uint8_t * framedata = res->data[0];
videoFrame.frameData = new uint8_t[videoFrame.width * 4 * videoFrame.height];
for(int y = 0;y < videoFrame.height;y++)
{
memcpy(videoFrame.frameData + ((videoFrame.height - y - 1) * videoFrame.lineSize), framedata + (y * res->linesize[0]), videoFrame.lineSize);
}
if (m_pFilterGraph)
{
avfilter_graph_free(&m_pFilterGraph);
}
}
