diff options
| -rw-r--r-- | media/libstagefright/wifi-display/source/Converter.cpp | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/media/libstagefright/wifi-display/source/Converter.cpp b/media/libstagefright/wifi-display/source/Converter.cpp index 82c98b9..7a87444 100644 --- a/media/libstagefright/wifi-display/source/Converter.cpp +++ b/media/libstagefright/wifi-display/source/Converter.cpp @@ -161,7 +161,24 @@ status_t Converter::initEncoder() { mOutputFormat->setInt32("bitrate", videoBitrate); mOutputFormat->setInt32("bitrate-mode", OMX_Video_ControlRateConstant); mOutputFormat->setInt32("frame-rate", 30); - mOutputFormat->setInt32("i-frame-interval", 1); // Iframes every 1 secs + mOutputFormat->setInt32("i-frame-interval", 15); // Iframes every 15 secs + + // Configure encoder to use intra macroblock refresh mode + mOutputFormat->setInt32("intra-refresh-mode", OMX_VIDEO_IntraRefreshCyclic); + + int width, height, mbs; + if (!mOutputFormat->findInt32("width", &width) + || !mOutputFormat->findInt32("height", &height)) { + return ERROR_UNSUPPORTED; + } + + // Update macroblocks in a cyclic fashion with 10% of all MBs within + // frame gets updated at one time. It takes about 10 frames to + // completely update a whole video frame. If the frame rate is 30, + // it takes about 333 ms in the best case (if next frame is not an IDR) + // to recover from a lost/corrupted packet. + mbs = (((width + 15) / 16) * ((height + 15) / 16) * 10) / 100; + mOutputFormat->setInt32("intra-refresh-CIR-mbs", mbs); } ALOGV("output format is '%s'", mOutputFormat->debugString(0).c_str()); |