diff options
| -rw-r--r-- | vp8/vp8_ratectrl_rtc.cc | 28 | ||||
| -rw-r--r-- | vp8/vp8_ratectrl_rtc.h | 3 |
2 files changed, 31 insertions, 0 deletions
diff --git a/vp8/vp8_ratectrl_rtc.cc b/vp8/vp8_ratectrl_rtc.cc index 65c58536a..60bc258a6 100644 --- a/vp8/vp8_ratectrl_rtc.cc +++ b/vp8/vp8_ratectrl_rtc.cc @@ -294,6 +294,34 @@ void VP8RateControlRTC::ComputeQP(const VP8FrameParamsQpRTC &frame_params) { int VP8RateControlRTC::GetQP() const { return q_; } +int VP8RateControlRTC::GetLoopfilterLevel() const { + VP8_COMMON *cm = &cpi_->common; + const double qp = q_; + + // This model is from linear regression + if (cm->Width * cm->Height <= 320 * 240) { + cm->filter_level = static_cast<int>(0.352685 * qp + 2.957774); + } else if (cm->Width * cm->Height <= 640 * 480) { + cm->filter_level = static_cast<int>(0.485069 * qp - 0.534462); + } else { + cm->filter_level = static_cast<int>(0.314875 * qp + 7.959003); + } + + int min_filter_level = 0; + // This logic is from get_min_filter_level() in picklpf.c + if (q_ > 6 && q_ <= 16) { + min_filter_level = 1; + } else { + min_filter_level = (q_ / 8); + } + + const int max_filter_level = 63; + if (cm->filter_level < min_filter_level) cm->filter_level = min_filter_level; + if (cm->filter_level > max_filter_level) cm->filter_level = max_filter_level; + + return cm->filter_level; +} + void VP8RateControlRTC::PostEncodeUpdate(uint64_t encoded_frame_size) { VP8_COMMON *const cm = &cpi_->common; vpx_clear_system_state(); diff --git a/vp8/vp8_ratectrl_rtc.h b/vp8/vp8_ratectrl_rtc.h index a8a886c56..496ef9eaa 100644 --- a/vp8/vp8_ratectrl_rtc.h +++ b/vp8/vp8_ratectrl_rtc.h @@ -42,6 +42,9 @@ class VP8RateControlRTC { bool UpdateRateControl(const VP8RateControlRtcConfig &rc_cfg); // GetQP() needs to be called after ComputeQP() to get the latest QP int GetQP() const; + // GetLoopfilterLevel() needs to be called after ComputeQP() since loopfilter + // level is calculated from frame qp. + int GetLoopfilterLevel() const; // int GetLoopfilterLevel() const; void ComputeQP(const VP8FrameParamsQpRTC &frame_params); // Feedback to rate control with the size of current encoded frame |