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Yaowu Xu authored
This commit changes to allow the usage of golden reference frame in VP9 CBR mode to improve quality. VP9 supports potentially up to 8 reference buffers, it has reference buffers available for this purpose. This was not possible in VP8 as golden and alt-ref buffers were used for temporal scalability purpose in CBR mode in WebRTC. For frames that update golden frame, there can be a quality boost. The amount of allowed bitrate boost can be controlled via parameter rc_max_inter_bitrate_pct. The inital value of the boost ratior is currently based on over_shoot_pct. Further experiments will work out the adaption of this boost value. Change-Id: I0c5f010c8fd8b7b598f69779c1b30e5b2ac30a4d
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