Revert of Reland 501823002: Used native deinterleaved and float point format for the input streams

media/base/audio_block_fifo.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/base/audio_block_fifo.h"
 
 #include "base/logging.h"
 
 namespace media {
 
 AudioBlockFifo::AudioBlockFifo(int channels, int frames, int blocks)
     : block_frames_(frames),
       write_block_(0),
       read_block_(0),
       available_blocks_(0),
       write_pos_(0) {
   // Create |blocks| of audio buses and push them to the containers.
   audio_blocks_.reserve(blocks);
   for (int i = 0; i < blocks; ++i) {
     scoped_ptr<AudioBus> audio_bus = AudioBus::Create(channels, frames);
     audio_blocks_.push_back(audio_bus.release());
   }
 }
 
-AudioBlockFifo::~AudioBlockFifo() {
-}
+AudioBlockFifo::~AudioBlockFifo() {}
 
 void AudioBlockFifo::Push(const void* source,
                           int frames,
                           int bytes_per_sample) {
   DCHECK(source);
   DCHECK_GT(frames, 0);
   DCHECK_GT(bytes_per_sample, 0);
   DCHECK_LT(available_blocks_, static_cast<int>(audio_blocks_.size()));
 
   const uint8* source_ptr = static_cast<const uint8*>(source);
   int frames_to_push = frames;
   while (frames_to_push) {
     // Get the current write block.
     AudioBus* current_block = audio_blocks_[write_block_];
 
     // Figure out what segment sizes we need when adding the new content to
     // the FIFO.
     const int push_frames =
         std::min(block_frames_ - write_pos_, frames_to_push);
 
     // Deinterleave the content to the FIFO and update the |write_pos_|.
     current_block->FromInterleavedPartial(
         source_ptr, write_pos_, push_frames, bytes_per_sample);
+    write_pos_ = (write_pos_ + push_frames) % block_frames_;
+    if (!write_pos_) {
+      // The current block is completely filled, increment |write_block_| and
+      // |available_blocks_|.
+      write_block_ = (write_block_ + 1) % audio_blocks_.size();
+      ++available_blocks_;
+    }
 
-    UpdatePosition(push_frames);
     source_ptr += push_frames * bytes_per_sample * current_block->channels();
     frames_to_push -= push_frames;
     DCHECK_GE(frames_to_push, 0);
   }
 }
 
-void AudioBlockFifo::Push(const AudioBus* source) {
-  DCHECK(source);
-  DCHECK_LT(available_blocks_, static_cast<int>(audio_blocks_.size()));
-
-  int source_start_frame = 0;
-  while (source_start_frame < source->frames()) {
-    // Get the current write block.
-    AudioBus* current_block = audio_blocks_[write_block_];
-    DCHECK_EQ(source->channels(), current_block->channels());
-
-    // Figure out what segment sizes we need when adding the new content to
-    // the FIFO.
-    const int push_frames = std::min(block_frames_ - write_pos_,
-                                     source->frames() - source_start_frame);
-
-    // Copy the data to FIFO.
-    source->CopyPartialFramesTo(
-        source_start_frame, push_frames, write_pos_, current_block);
-
-    UpdatePosition(push_frames);
-    source_start_frame += push_frames;
-    DCHECK_LE(source_start_frame, source->frames());
-  }
-}
-
 const AudioBus* AudioBlockFifo::Consume() {
   DCHECK(available_blocks_);
   AudioBus* audio_bus = audio_blocks_[read_block_];
   read_block_ = (read_block_ + 1) % audio_blocks_.size();
   --available_blocks_;
   return audio_bus;
 }
 
 void AudioBlockFifo::Clear() {
   write_pos_ = 0;
   write_block_ = 0;
   read_block_ = 0;
   available_blocks_ = 0;
 }
 
 int AudioBlockFifo::GetAvailableFrames() const {
   return available_blocks_ * block_frames_ + write_pos_;
 }
 
 int AudioBlockFifo::GetUnfilledFrames() const {
   const int unfilled_frames =
       (audio_blocks_.size() - available_blocks_) * block_frames_ - write_pos_;
   DCHECK_GE(unfilled_frames, 0);
   return unfilled_frames;
 }
 
-void AudioBlockFifo::UpdatePosition(int push_frames) {
-  write_pos_ = (write_pos_ + push_frames) % block_frames_;
-  if (!write_pos_) {
-    // The current block is completely filled, increment |write_block_| and
-    // |available_blocks_|.
-    write_block_ = (write_block_ + 1) % audio_blocks_.size();
-    ++available_blocks_;
-  }
-}
-
 }  // namespace media