Revert of Issue 2434073003: Extract bitrate allocation ...

webrtc/modules/video_coding/codecs/vp8/realtime_temporal_layers.cc

Index: webrtc/modules/video_coding/codecs/vp8/realtime_temporal_layers.cc
diff --git a/webrtc/modules/video_coding/codecs/vp8/realtime_temporal_layers.cc b/webrtc/modules/video_coding/codecs/vp8/realtime_temporal_layers.cc
index a3e65e4ce0d8c159f6ec68ea7bbf407338d4bfc5..b9721cde1bcc6b6b9bb31a3962db0dfe0c3deb2f 100644
--- a/webrtc/modules/video_coding/codecs/vp8/realtime_temporal_layers.cc
+++ b/webrtc/modules/video_coding/codecs/vp8/realtime_temporal_layers.cc
@@ -12,8 +12,6 @@
 
 #include "vpx/vpx_encoder.h"
 #include "vpx/vp8cx.h"
-#include "webrtc/base/checks.h"
-#include "webrtc/base/optional.h"
 #include "webrtc/modules/video_coding/include/video_codec_interface.h"
 #include "webrtc/modules/video_coding/codecs/vp8/include/vp8_common_types.h"
 #include "webrtc/modules/video_coding/codecs/vp8/temporal_layers.h"
@@ -97,20 +95,26 @@
         layer_ids_(NULL),
         encode_flags_length_(0),
         encode_flags_(NULL) {
-    RTC_CHECK_GE(max_temporal_layers_, 1);
-    RTC_CHECK_GE(max_temporal_layers_, 3);
+    assert(max_temporal_layers_ >= 1);
+    assert(max_temporal_layers_ <= 3);
   }
 
   virtual ~RealTimeTemporalLayers() {}
 
-  std::vector<uint32_t> OnRatesUpdated(int bitrate_kbps,
-                                       int max_bitrate_kbps,
-                                       int framerate) override {
+  bool ConfigureBitrates(int bitrate_kbit,
+                         int max_bitrate_kbit,
+                         int framerate,
+                         vpx_codec_enc_cfg_t* cfg) override {
     temporal_layers_ =
         CalculateNumberOfTemporalLayers(temporal_layers_, framerate);
     temporal_layers_ = std::min(temporal_layers_, max_temporal_layers_);
-    RTC_CHECK_GE(temporal_layers_, 1);
-    RTC_CHECK_LE(temporal_layers_, 3);
+    assert(temporal_layers_ >= 1 && temporal_layers_ <= 3);
+
+    cfg->ts_number_layers = temporal_layers_;
+    for (int tl = 0; tl < temporal_layers_; ++tl) {
+      cfg->ts_target_bitrate[tl] =
+          bitrate_kbit * kVp8LayerRateAlloction[temporal_layers_ - 1][tl];
+    }
 
     switch (temporal_layers_) {
       case 1: {
@@ -121,6 +125,9 @@
         static const int encode_flags[] = {kTemporalUpdateLastRefAll};
         encode_flags_length_ = sizeof(encode_flags) / sizeof(*layer_ids);
         encode_flags_ = encode_flags;
+
+        cfg->ts_rate_decimator[0] = 1;
+        cfg->ts_periodicity = layer_ids_length_;
       } break;
 
       case 2: {
@@ -139,6 +146,10 @@
             kTemporalUpdateNone};
         encode_flags_length_ = sizeof(encode_flags) / sizeof(*layer_ids);
         encode_flags_ = encode_flags;
+
+        cfg->ts_rate_decimator[0] = 2;
+        cfg->ts_rate_decimator[1] = 1;
+        cfg->ts_periodicity = layer_ids_length_;
       } break;
 
       case 3: {
@@ -157,59 +168,19 @@
             kTemporalUpdateNone};
         encode_flags_length_ = sizeof(encode_flags) / sizeof(*layer_ids);
         encode_flags_ = encode_flags;
+
+        cfg->ts_rate_decimator[0] = 4;
+        cfg->ts_rate_decimator[1] = 2;
+        cfg->ts_rate_decimator[2] = 1;
+        cfg->ts_periodicity = layer_ids_length_;
       } break;
 
       default:
-        RTC_NOTREACHED();
-        return std::vector<uint32_t>();
+        assert(false);
+        return false;
     }
-
-    std::vector<uint32_t> bitrates;
-    const int num_layers = std::max(1, temporal_layers_);
-    for (int i = 0; i < num_layers; ++i) {
-      float layer_bitrate =
-          bitrate_kbps * kVp8LayerRateAlloction[num_layers - 1][i];
-      bitrates.push_back(static_cast<uint32_t>(layer_bitrate + 0.5));
-    }
-    new_bitrates_kbps_ = rtc::Optional<std::vector<uint32_t>>(bitrates);
-
-    // Allocation table is of aggregates, transform to individual rates.
-    uint32_t sum = 0;
-    for (int i = 0; i < num_layers; ++i) {
-      uint32_t layer_bitrate = bitrates[i];
-      RTC_DCHECK_LE(sum, bitrates[i]);
-      bitrates[i] -= sum;
-      sum += layer_bitrate;
-
-      if (sum == static_cast<uint32_t>(bitrate_kbps)) {
-        // Sum adds up; any subsequent layers will be 0.
-        bitrates.resize(i);
-        break;
-      }
-    }
-
-    return bitrates;
-  }
-
-  bool UpdateConfiguration(vpx_codec_enc_cfg_t* cfg) override {
-    if (!new_bitrates_kbps_)
-      return false;
-
-    cfg->ts_number_layers = temporal_layers_;
-    for (int tl = 0; tl < temporal_layers_; ++tl) {
-      cfg->ts_target_bitrate[tl] = (*new_bitrates_kbps_)[tl];
-    }
-    new_bitrates_kbps_ = rtc::Optional<std::vector<uint32_t>>();
-
-    cfg->ts_periodicity = layer_ids_length_;
-    int decimator = 1;
-    for (int i = temporal_layers_ - 1; i >= 0; --i, decimator *= 2) {
-      cfg->ts_rate_decimator[i] = decimator;
-    }
-
     memcpy(cfg->ts_layer_id, layer_ids_,
            sizeof(unsigned int) * layer_ids_length_);
-
     return true;
   }
 
@@ -277,6 +248,8 @@
 
   void FrameEncoded(unsigned int size, uint32_t timestamp, int qp) override {}
 
+  bool UpdateConfiguration(vpx_codec_enc_cfg_t* cfg) override { return false; }
+
  private:
   int temporal_layers_;
   int max_temporal_layers_;
@@ -293,19 +266,12 @@
   // Pattern of encode flags.
   int encode_flags_length_;
   const int* encode_flags_;
-
-  rtc::Optional<std::vector<uint32_t>> new_bitrates_kbps_;
 };
 }  // namespace
 
 TemporalLayers* RealTimeTemporalLayersFactory::Create(
-    int simulcast_id,
     int max_temporal_layers,
     uint8_t initial_tl0_pic_idx) const {
-  TemporalLayers* tl =
-      new RealTimeTemporalLayers(max_temporal_layers, initial_tl0_pic_idx);
-  if (listener_)
-    listener_->OnTemporalLayersCreated(simulcast_id, tl);
-  return tl;
+  return new RealTimeTemporalLayers(max_temporal_layers, initial_tl0_pic_idx);
 }
 }  // namespace webrtc