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In screenshare mode, suppress VP8 bitrate overshoot and increase quality

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This change includes several improvements:

* VP8 configured with new rate control
* Detection of frame dropping, with qp bump for next frame
* Increased target and TL0 bitrates
* Reworked rate control (TL allocation) in screenshare_layers

A note on performance: PSNR and SSIM is expected to get slightly worse with this cl. Frame drops and delays should however improve.

BUG=4171
R=pbos@webrtc.org, stefan@webrtc.org

Review URL: https://codereview.webrtc.org/1193513006.

Cr-Commit-Position: refs/heads/master@{#9495}
This commit is contained in:
Erik Språng
2015-06-24 11:24:44 +02:00
parent 7ab5f801dd
commit 2c4c914819
16 changed files with 610 additions and 294 deletions
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8
webrtc/modules/video_coding/codecs/vp8/simulcast_unittest.h
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@ -196,12 +196,16 @@ class SkipEncodingUnusedStreamsTest {
layers_->PopulateCodecSpecific(base_layer_sync, vp8_info, timestamp);
}
void FrameEncoded(unsigned int size, uint32_t timestamp) override {
layers_->FrameEncoded(size, timestamp);
void FrameEncoded(unsigned int size, uint32_t timestamp, int qp) override {
layers_->FrameEncoded(size, timestamp, qp);
}
int CurrentLayerId() const override { return layers_->CurrentLayerId(); }
bool UpdateConfiguration(vpx_codec_enc_cfg_t* cfg) override {
return false;
}
int configured_bitrate_;
TemporalLayers* layers_;
};