Migrate webkit/renderer/media/ to content/renderer/media/.

webkit/renderer/media/audio_decoder.cc

-// Copyright 2013 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 "webkit/renderer/media/audio_decoder.h"
-
-#include <vector>
-#include "base/basictypes.h"
-#include "base/strings/string_util.h"
-#include "base/time.h"
-#include "media/base/audio_bus.h"
-#include "media/base/limits.h"
-#include "media/filters/audio_file_reader.h"
-#include "media/filters/in_memory_url_protocol.h"
-#include "third_party/WebKit/public/platform/WebAudioBus.h"
-
-using media::AudioBus;
-using media::AudioFileReader;
-using media::InMemoryUrlProtocol;
-using std::vector;
-using WebKit::WebAudioBus;
-
-namespace webkit_media {
-
-// Decode in-memory audio file data.
-bool DecodeAudioFileData(
-    WebKit::WebAudioBus* destination_bus,
-    const char* data, size_t data_size, double sample_rate) {
-  DCHECK(destination_bus);
-  if (!destination_bus)
-    return false;
-
-  // Uses the FFmpeg library for audio file reading.
-  InMemoryUrlProtocol url_protocol(reinterpret_cast<const uint8*>(data),
-                                   data_size, false);
-  AudioFileReader reader(&url_protocol);
-
-  if (!reader.Open())
-    return false;
-
-  size_t number_of_channels = reader.channels();
-  double file_sample_rate = reader.sample_rate();
-  size_t number_of_frames = static_cast<size_t>(reader.number_of_frames());
-
-  // Apply sanity checks to make sure crazy values aren't coming out of
-  // FFmpeg.
-  if (!number_of_channels ||
-      number_of_channels > static_cast<size_t>(media::limits::kMaxChannels) ||
-      file_sample_rate < media::limits::kMinSampleRate ||
-      file_sample_rate > media::limits::kMaxSampleRate)
-    return false;
-
-  // Allocate and configure the output audio channel data.
-  destination_bus->initialize(number_of_channels,
-                              number_of_frames,
-                              file_sample_rate);
-
-  // Wrap the channel pointers which will receive the decoded PCM audio.
-  vector<float*> audio_data;
-  audio_data.reserve(number_of_channels);
-  for (size_t i = 0; i < number_of_channels; ++i) {
-    audio_data.push_back(destination_bus->channelData(i));
-  }
-
-  scoped_ptr<AudioBus> audio_bus = AudioBus::WrapVector(
-      number_of_frames, audio_data);
-
-  // Decode the audio file data.
-  // TODO(crogers): If our estimate was low, then we still may fail to read
-  // all of the data from the file.
-  size_t actual_frames = reader.Read(audio_bus.get());
-
-  // Adjust WebKit's bus to account for the actual file length
-  // and valid data read.
-  if (actual_frames != number_of_frames) {
-    DCHECK_LE(actual_frames, number_of_frames);
-    destination_bus->resizeSmaller(actual_frames);
-  }
-
-  double duration = actual_frames / file_sample_rate;
-
-  DVLOG(1) << "Decoded file data -"
-           << " data: " << data
-           << " data size: " << data_size
-           << " duration: " << duration
-           << " number of frames: " << actual_frames
-           << " sample rate: " << file_sample_rate
-           << " number of channels: " << number_of_channels;
-
-  return actual_frames > 0;
-}
-
-}  // namespace webkit_media