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Lower the level_idc of the SPS to the minimum required for streaming at a given resolution

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This commit is contained in:
Cameron Gutman 2014-12-01 22:58:52 -08:00
parent 51aacc3f38
commit 3236c0b93a
1 changed files with 17 additions and 0 deletions
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17
app/src/main/java/com/limelight/binding/video/MediaCodecDecoderRenderer.java
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@ -410,6 +410,23 @@ public class MediaCodecDecoderRenderer extends EnhancedDecoderRenderer {
spsBuf.position(header.offset+5);
SeqParameterSet sps = SeqParameterSet.read(spsBuf);
// Some decoders rely on H264 level to decide how many buffers are needed
// Since we only need one frame buffered, we'll set the level as low as we can
// for known resolution combinations
if (initialWidth == 1280 && initialHeight == 720) {
// Max 5 buffered frames at 1280x720x60
LimeLog.info("Patching level_idc to 32");
sps.level_idc = 32;
}
else if (initialWidth == 1920 && initialHeight == 1080) {
// Max 4 buffered frames at 1920x1080x64
LimeLog.info("Patching level_idc to 42");
sps.level_idc = 42;
}
else {
// Leave the profile alone (currently 5.0)
}
// TI OMAP4 requires a reference frame count of 1 to decode successfully. Exynos 4
// also requires this fixup.