Add vp8 support to rc lib

For 1 layer CBR only.
Support for temporal layers comes later.

Rename the library to libvpxrc

Bug: b/188853141

Change-Id: Ib7f977b64c05b1a0596870cb7f8e6768cb483850

1 files changed, 62 insertions, 0 deletions

diff --git a/vp8/vp8_ratectrl_rtc.h b/vp8/vp8_ratectrl_rtc.h
new file mode 100644
index 000000000..a1cd52b05
--- /dev/null
+++ b/vp8/vp8_ratectrl_rtc.h
@@ -0,0 +1,62 @@
+/*
+ *  Copyright (c) 2021 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef VPX_VP8_RATECTRL_RTC_H_
+#define VPX_VP8_RATECTRL_RTC_H_
+
+#include <cstdint>
+#include <memory>
+
+#include "vp8/encoder/onyx_int.h"
+#include "vp8/common/common.h"
+#include "vpx/internal/vpx_ratectrl_rtc.h"
+
+namespace libvpx {
+struct VP8RateControlRtcConfig : public VpxRateControlRtcConfig {
+ public:
+  VP8RateControlRtcConfig() {
+    vp8_zero(layer_target_bitrate);
+    vp8_zero(ts_rate_decimator);
+  }
+};
+
+struct VP8FrameParamsQpRTC {
+  FRAME_TYPE frame_type;
+};
+
+class VP8RateControlRTC {
+ public:
+  static std::unique_ptr<VP8RateControlRTC> Create(
+      const VP8RateControlRtcConfig &cfg);
+  ~VP8RateControlRTC() {
+    if (cpi_) {
+      vpx_free(cpi_->gf_active_flags);
+      vpx_free(cpi_);
+    }
+  }
+
+  void UpdateRateControl(const VP8RateControlRtcConfig &rc_cfg);
+  // GetQP() needs to be called after ComputeQP() to get the latest QP
+  int GetQP() const;
+  // int GetLoopfilterLevel() const;
+  void ComputeQP(const VP8FrameParamsQpRTC &frame_params);
+  // Feedback to rate control with the size of current encoded frame
+  void PostEncodeUpdate(uint64_t encoded_frame_size);
+
+ private:
+  VP8RateControlRTC() {}
+  void InitRateControl(const VP8RateControlRtcConfig &cfg);
+  VP8_COMP *cpi_;
+  int q_;
+};
+
+}  // namespace libvpx
+
+#endif  // VPX_VP8_RATECTRL_RTC_H_