Revert "Used native deinterleaved and float point format for the input streams."

media/audio/mac/audio_low_latency_input_mac.cc

 // Copyright (c) 2012 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/audio/mac/audio_low_latency_input_mac.h"
 
 #include <CoreServices/CoreServices.h>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/mac/mac_logging.h"
 #include "media/audio/mac/audio_manager_mac.h"
-#include "media/base/audio_block_fifo.h"
 #include "media/base/audio_bus.h"
 #include "media/base/data_buffer.h"
 
 namespace media {
 
 // Number of blocks of buffers used in the |fifo_|.
 const int kNumberOfBlocksBufferInFifo = 2;
 
 static std::ostream& operator<<(std::ostream& os,
                                 const AudioStreamBasicDescription& format) {
   os << "sample rate       : " << format.mSampleRate << std::endl
      << "format ID         : " << format.mFormatID << std::endl
      << "format flags      : " << format.mFormatFlags << std::endl
      << "bytes per packet  : " << format.mBytesPerPacket << std::endl
      << "frames per packet : " << format.mFramesPerPacket << std::endl
      << "bytes per frame   : " << format.mBytesPerFrame << std::endl
      << "channels per frame: " << format.mChannelsPerFrame << std::endl
      << "bits per channel  : " << format.mBitsPerChannel;
   return os;
 }
 
-static void WrapBufferList(AudioBufferList* buffer_list,
-                           AudioBus* bus,
-                           int frames) {
-  DCHECK(buffer_list);
-  DCHECK(bus);
-  const int channels = bus->channels();
-  const int buffer_list_channels = buffer_list->mNumberBuffers;
-  CHECK_EQ(channels, buffer_list_channels);
-
-  // Copy pointers from AudioBufferList.
-  for (int i = 0; i < channels; ++i)
-    bus->SetChannelData(i, static_cast<float*>(buffer_list->mBuffers[i].mData));
-
-  // Finally set the actual length.
-  bus->set_frames(frames);
-}
-
 // See "Technical Note TN2091 - Device input using the HAL Output Audio Unit"
 // http://developer.apple.com/library/mac/#technotes/tn2091/_index.html
 // for more details and background regarding this implementation.
 
 AUAudioInputStream::AUAudioInputStream(AudioManagerMac* manager,
                                        const AudioParameters& input_params,
                                        AudioDeviceID audio_device_id)
     : manager_(manager),
       number_of_frames_(input_params.frames_per_buffer()),
       sink_(NULL),
       audio_unit_(0),
       input_device_id_(audio_device_id),
       started_(false),
       hardware_latency_frames_(0),
       number_of_channels_in_frame_(0),
-      audio_wrapper_(AudioBus::CreateWrapper(input_params.channels())) {
+      fifo_(input_params.channels(),
+            number_of_frames_,
+            kNumberOfBlocksBufferInFifo) {
   DCHECK(manager_);
 
   // Set up the desired (output) format specified by the client.
   format_.mSampleRate = input_params.sample_rate();
   format_.mFormatID = kAudioFormatLinearPCM;
-  format_.mFormatFlags =
-      kAudioFormatFlagsNativeFloatPacked | kLinearPCMFormatFlagIsNonInterleaved;
-  size_t bytes_per_sample = sizeof(Float32);
-  format_.mBitsPerChannel = bytes_per_sample * 8;
+  format_.mFormatFlags = kLinearPCMFormatFlagIsPacked |
+                         kLinearPCMFormatFlagIsSignedInteger;
+  format_.mBitsPerChannel = input_params.bits_per_sample();
   format_.mChannelsPerFrame = input_params.channels();
-  format_.mFramesPerPacket = 1;
-  format_.mBytesPerFrame = bytes_per_sample;
-  format_.mBytesPerPacket = format_.mBytesPerFrame * format_.mFramesPerPacket;
+  format_.mFramesPerPacket = 1;  // uncompressed audio
+  format_.mBytesPerPacket = (format_.mBitsPerChannel *
+                             input_params.channels()) / 8;
+  format_.mBytesPerFrame = format_.mBytesPerPacket;
   format_.mReserved = 0;
 
   DVLOG(1) << "Desired ouput format: " << format_;
 
-  // Allocate AudioBufferList based on the number of channels.
-  audio_buffer_list_.reset(static_cast<AudioBufferList*>(
-      malloc(sizeof(AudioBufferList) * input_params.channels())));
-  audio_buffer_list_->mNumberBuffers = input_params.channels();
+  // Derive size (in bytes) of the buffers that we will render to.
+  UInt32 data_byte_size = number_of_frames_ * format_.mBytesPerFrame;
+  DVLOG(1) << "Size of data buffer in bytes : " << data_byte_size;
 
   // Allocate AudioBuffers to be used as storage for the received audio.
   // The AudioBufferList structure works as a placeholder for the
   // AudioBuffer structure, which holds a pointer to the actual data buffer.
-  UInt32 data_byte_size = number_of_frames_ * format_.mBytesPerFrame;
-  audio_data_buffer_.reset(static_cast<float*>(base::AlignedAlloc(
-      data_byte_size * audio_buffer_list_->mNumberBuffers,
-      AudioBus::kChannelAlignment)));
-  AudioBuffer* audio_buffer = audio_buffer_list_->mBuffers;
-  for (UInt32 i = 0; i < audio_buffer_list_->mNumberBuffers; ++i) {
-    audio_buffer[i].mNumberChannels = 1;
-    audio_buffer[i].mDataByteSize = data_byte_size;
-    audio_buffer[i].mData = audio_data_buffer_.get() + i * data_byte_size;
-  }
+  audio_data_buffer_.reset(new uint8[data_byte_size]);
+  audio_buffer_list_.mNumberBuffers = 1;
+
+  AudioBuffer* audio_buffer = audio_buffer_list_.mBuffers;
+  audio_buffer->mNumberChannels = input_params.channels();
+  audio_buffer->mDataByteSize = data_byte_size;
+  audio_buffer->mData = audio_data_buffer_.get();
 }
 
-AUAudioInputStream::~AUAudioInputStream() {
-}
+AUAudioInputStream::~AUAudioInputStream() {}
 
 // Obtain and open the AUHAL AudioOutputUnit for recording.
 bool AUAudioInputStream::Open() {
   // Verify that we are not already opened.
   if (audio_unit_)
     return false;
 
   // Verify that we have a valid device.
   if (input_device_id_ == kAudioObjectUnknown) {
     NOTREACHED() << "Device ID is unknown";
@@ skipping 62 matching lines @@
                                 kAudioOutputUnitProperty_CurrentDevice,
                                 kAudioUnitScope_Global,
                                 0,
                                 &input_device_id_,
                                 sizeof(input_device_id_));
   if (result) {
     HandleError(result);
     return false;
   }
 
+  // Register the input procedure for the AUHAL.
+  // This procedure will be called when the AUHAL has received new data
+  // from the input device.
+  AURenderCallbackStruct callback;
+  callback.inputProc = InputProc;
+  callback.inputProcRefCon = this;
+  result = AudioUnitSetProperty(audio_unit_,
+                                kAudioOutputUnitProperty_SetInputCallback,
+                                kAudioUnitScope_Global,
+                                0,
+                                &callback,
+                                sizeof(callback));
+  if (result) {
+    HandleError(result);
+    return false;
+  }
+
   // Set up the the desired (output) format.
   // For obtaining input from a device, the device format is always expressed
   // on the output scope of the AUHAL's Element 1.
   result = AudioUnitSetProperty(audio_unit_,
                                 kAudioUnitProperty_StreamFormat,
                                 kAudioUnitScope_Output,
                                 1,
                                 &format_,
                                 sizeof(format_));
   if (result) {
@@ skipping 27 matching lines @@
                                   kAudioUnitScope_Output,
                                   1,
                                   &buffer_size,
                                   sizeof(buffer_size));
     if (result != noErr) {
       HandleError(result);
       return false;
     }
   }
 
-  // Register the input procedure for the AUHAL.
-  // This procedure will be called when the AUHAL has received new data
-  // from the input device.
-  AURenderCallbackStruct callback;
-  callback.inputProc = InputProc;
-  callback.inputProcRefCon = this;
-  result = AudioUnitSetProperty(audio_unit_,
-                                kAudioOutputUnitProperty_SetInputCallback,
-                                kAudioUnitScope_Global,
-                                0,
-                                &callback,
-                                sizeof(callback));
-  if (result) {
-    HandleError(result);
-    return false;
-  }
-
   // Finally, initialize the audio unit and ensure that it is ready to render.
   // Allocates memory according to the maximum number of audio frames
   // it can produce in response to a single render call.
   result = AudioUnitInitialize(audio_unit_);
   if (result) {
     HandleError(result);
     return false;
   }
 
   // The hardware latency is fixed and will not change during the call.
@@ skipping 93 matching lines @@
   DCHECK_LE(volume, 1.0);
 
   // Verify that we have a valid device.
   if (input_device_id_ == kAudioObjectUnknown) {
     NOTREACHED() << "Device ID is unknown";
     return;
   }
 
   Float32 volume_float32 = static_cast<Float32>(volume);
   AudioObjectPropertyAddress property_address = {
-      kAudioDevicePropertyVolumeScalar,
-      kAudioDevicePropertyScopeInput,
-      kAudioObjectPropertyElementMaster
+    kAudioDevicePropertyVolumeScalar,
+    kAudioDevicePropertyScopeInput,
+    kAudioObjectPropertyElementMaster
   };
 
   // Try to set the volume for master volume channel.
   if (IsVolumeSettableOnChannel(kAudioObjectPropertyElementMaster)) {
     OSStatus result = AudioObjectSetPropertyData(input_device_id_,
                                                  &property_address,
                                                  0,
                                                  NULL,
                                                  sizeof(volume_float32),
                                                  &volume_float32);
@@ skipping 25 matching lines @@
   // Update the AGC volume level based on the last setting above. Note that,
   // the volume-level resolution is not infinite and it is therefore not
   // possible to assume that the volume provided as input parameter can be
   // used directly. Instead, a new query to the audio hardware is required.
   // This method does nothing if AGC is disabled.
   UpdateAgcVolume();
 }
 
 double AUAudioInputStream::GetVolume() {
   // Verify that we have a valid device.
-  if (input_device_id_ == kAudioObjectUnknown) {
+  if (input_device_id_ == kAudioObjectUnknown){
     NOTREACHED() << "Device ID is unknown";
     return 0.0;
   }
 
   AudioObjectPropertyAddress property_address = {
-      kAudioDevicePropertyVolumeScalar,
-      kAudioDevicePropertyScopeInput,
-      kAudioObjectPropertyElementMaster
+    kAudioDevicePropertyVolumeScalar,
+    kAudioDevicePropertyScopeInput,
+    kAudioObjectPropertyElementMaster
   };
 
   if (AudioObjectHasProperty(input_device_id_, &property_address)) {
     // The device supports master volume control, get the volume from the
     // master channel.
     Float32 volume_float32 = 0.0;
     UInt32 size = sizeof(volume_float32);
-    OSStatus result = AudioObjectGetPropertyData(
-        input_device_id_, &property_address, 0, NULL, &size, &volume_float32);
+    OSStatus result = AudioObjectGetPropertyData(input_device_id_,
+                                                 &property_address,
+                                                 0,
+                                                 NULL,
+                                                 &size,
+                                                 &volume_float32);
     if (result == noErr)
       return static_cast<double>(volume_float32);
   } else {
     // There is no master volume control, try to get the average volume of
     // all the channels.
     Float32 volume_float32 = 0.0;
     int successful_channels = 0;
     for (int i = 1; i <= number_of_channels_in_frame_; ++i) {
       property_address.mElement = static_cast<UInt32>(i);
       if (AudioObjectHasProperty(input_device_id_, &property_address)) {
@@ skipping 40 matching lines @@
   OSStatus result = AudioUnitRender(audio_input->audio_unit(),
                                     flags,
                                     time_stamp,
                                     bus_number,
                                     number_of_frames,
                                     audio_input->audio_buffer_list());
   if (result)
     return result;
 
   // Deliver recorded data to the consumer as a callback.
-  return audio_input->Provide(
-      number_of_frames, audio_input->audio_buffer_list(), time_stamp);
+  return audio_input->Provide(number_of_frames,
+                              audio_input->audio_buffer_list(),
+                              time_stamp);
 }
 
 OSStatus AUAudioInputStream::Provide(UInt32 number_of_frames,
                                      AudioBufferList* io_data,
                                      const AudioTimeStamp* time_stamp) {
   // Update the capture latency.
   double capture_latency_frames = GetCaptureLatency(time_stamp);
 
   // The AGC volume level is updated once every second on a separate thread.
   // Note that, |volume| is also updated each time SetVolume() is called
   // through IPC by the render-side AGC.
   double normalized_volume = 0.0;
   GetAgcVolume(&normalized_volume);
 
   AudioBuffer& buffer = io_data->mBuffers[0];
   uint8* audio_data = reinterpret_cast<uint8*>(buffer.mData);
-  uint32 capture_delay_bytes = static_cast<uint32>(
-      (capture_latency_frames + 0.5) * format_.mBytesPerFrame);
+  uint32 capture_delay_bytes = static_cast<uint32>
+      ((capture_latency_frames + 0.5) * format_.mBytesPerFrame);
   DCHECK(audio_data);
   if (!audio_data)
     return kAudioUnitErr_InvalidElement;
 
-  // Wrap the output AudioBufferList to |audio_wrapper_|.
-  WrapBufferList(io_data, audio_wrapper_.get(), number_of_frames);
+  // Copy captured (and interleaved) data into FIFO.
+  fifo_.Push(audio_data, number_of_frames, format_.mBitsPerChannel / 8);
 
-  // If the stream parameters change for any reason, we need to insert a FIFO
-  // since the OnMoreData() pipeline can't handle frame size changes.
-  if (number_of_frames != number_of_frames_) {
-    // Create a FIFO on the fly to handle any discrepancies in callback rates.
-    if (!fifo_) {
-      fifo_.reset(new AudioBlockFifo(audio_wrapper_->channels(),
-                                     number_of_frames_,
-                                     kNumberOfBlocksBufferInFifo));
-    }
-  }
+  // Consume and deliver the data when the FIFO has a block of available data.
+  while (fifo_.available_blocks()) {
+    const AudioBus* audio_bus = fifo_.Consume();
+    DCHECK_EQ(audio_bus->frames(), static_cast<int>(number_of_frames_));
 
-  // When FIFO does not kick in, data will be directly passed to the callback.
-  if (!fifo_) {
-    CHECK_EQ(audio_wrapper_->frames(), static_cast<int>(number_of_frames_));
-    sink_->OnData(
-        this, audio_wrapper_.get(), capture_delay_bytes, normalized_volume);
-    return noErr;
-  }
-
-  // Compensate the audio delay caused by the FIFO.
-  capture_delay_bytes += fifo_->GetAvailableFrames() * format_.mBytesPerFrame;
-
-  fifo_->Push(audio_wrapper_.get());
-  // Consume and deliver the data when the FIFO has a block of available data.
-  while (fifo_->available_blocks()) {
-    const AudioBus* audio_bus = fifo_->Consume();
-    DCHECK_EQ(audio_bus->frames(), static_cast<int>(number_of_frames_));
+    // Compensate the audio delay caused by the FIFO.
+    capture_delay_bytes += fifo_.GetAvailableFrames() * format_.mBytesPerFrame;
     sink_->OnData(this, audio_bus, capture_delay_bytes, normalized_volume);
   }
 
   return noErr;
 }
 
 int AUAudioInputStream::HardwareSampleRate() {
   // Determine the default input device's sample-rate.
   AudioDeviceID device_id = kAudioObjectUnknown;
   UInt32 info_size = sizeof(device_id);
 
   AudioObjectPropertyAddress default_input_device_address = {
-      kAudioHardwarePropertyDefaultInputDevice,
-      kAudioObjectPropertyScopeGlobal,
-      kAudioObjectPropertyElementMaster
+    kAudioHardwarePropertyDefaultInputDevice,
+    kAudioObjectPropertyScopeGlobal,
+    kAudioObjectPropertyElementMaster
   };
   OSStatus result = AudioObjectGetPropertyData(kAudioObjectSystemObject,
                                                &default_input_device_address,
                                                0,
                                                0,
                                                &info_size,
                                                &device_id);
   if (result != noErr)
     return 0.0;
 
   Float64 nominal_sample_rate;
   info_size = sizeof(nominal_sample_rate);
 
   AudioObjectPropertyAddress nominal_sample_rate_address = {
-      kAudioDevicePropertyNominalSampleRate, kAudioObjectPropertyScopeGlobal,
-      kAudioObjectPropertyElementMaster};
+    kAudioDevicePropertyNominalSampleRate,
+    kAudioObjectPropertyScopeGlobal,
+    kAudioObjectPropertyElementMaster
+  };
   result = AudioObjectGetPropertyData(device_id,
                                       &nominal_sample_rate_address,
                                       0,
                                       0,
                                       &info_size,
                                       &nominal_sample_rate);
   if (result != noErr)
     return 0.0;
 
   return static_cast<int>(nominal_sample_rate);
@@ skipping 12 matching lines @@
                                          kAudioUnitProperty_Latency,
                                          kAudioUnitScope_Global,
                                          0,
                                          &audio_unit_latency_sec,
                                          &size);
   OSSTATUS_DLOG_IF(WARNING, result != noErr, result)
       << "Could not get audio unit latency";
 
   // Get input audio device latency.
   AudioObjectPropertyAddress property_address = {
-      kAudioDevicePropertyLatency,
-      kAudioDevicePropertyScopeInput,
-      kAudioObjectPropertyElementMaster
+    kAudioDevicePropertyLatency,
+    kAudioDevicePropertyScopeInput,
+    kAudioObjectPropertyElementMaster
   };
   UInt32 device_latency_frames = 0;
   size = sizeof(device_latency_frames);
   result = AudioObjectGetPropertyData(input_device_id_,
                                       &property_address,
                                       0,
                                       NULL,
                                       &size,
                                       &device_latency_frames);
   DLOG_IF(WARNING, result != noErr) << "Could not get audio device latency.";
 
-  return static_cast<double>((audio_unit_latency_sec * format_.mSampleRate) +
-                             device_latency_frames);
+  return static_cast<double>((audio_unit_latency_sec *
+      format_.mSampleRate) + device_latency_frames);
 }
 
 double AUAudioInputStream::GetCaptureLatency(
     const AudioTimeStamp* input_time_stamp) {
   // Get the delay between between the actual recording instant and the time
   // when the data packet is provided as a callback.
-  UInt64 capture_time_ns =
-      AudioConvertHostTimeToNanos(input_time_stamp->mHostTime);
+  UInt64 capture_time_ns = AudioConvertHostTimeToNanos(
+      input_time_stamp->mHostTime);
   UInt64 now_ns = AudioConvertHostTimeToNanos(AudioGetCurrentHostTime());
-  double delay_frames = static_cast<double>(1e-9 * (now_ns - capture_time_ns) *
-                                            format_.mSampleRate);
+  double delay_frames = static_cast<double>
+      (1e-9 * (now_ns - capture_time_ns) * format_.mSampleRate);
 
   // Total latency is composed by the dynamic latency and the fixed
   // hardware latency.
   return (delay_frames + hardware_latency_frames_);
 }
 
 int AUAudioInputStream::GetNumberOfChannelsFromStream() {
   // Get the stream format, to be able to read the number of channels.
   AudioObjectPropertyAddress property_address = {
-      kAudioDevicePropertyStreamFormat,
-      kAudioDevicePropertyScopeInput,
-      kAudioObjectPropertyElementMaster
+    kAudioDevicePropertyStreamFormat,
+    kAudioDevicePropertyScopeInput,
+    kAudioObjectPropertyElementMaster
   };
   AudioStreamBasicDescription stream_format;
   UInt32 size = sizeof(stream_format);
-  OSStatus result = AudioObjectGetPropertyData(
-      input_device_id_, &property_address, 0, NULL, &size, &stream_format);
+  OSStatus result = AudioObjectGetPropertyData(input_device_id_,
+                                               &property_address,
+                                               0,
+                                               NULL,
+                                               &size,
+                                               &stream_format);
   if (result != noErr) {
     DLOG(WARNING) << "Could not get stream format";
     return 0;
   }
 
   return static_cast<int>(stream_format.mChannelsPerFrame);
 }
 
 void AUAudioInputStream::HandleError(OSStatus err) {
-  NOTREACHED() << "error " << GetMacOSStatusErrorString(err) << " (" << err
-               << ")";
+  NOTREACHED() << "error " << GetMacOSStatusErrorString(err)
+               << " (" << err << ")";
   if (sink_)
     sink_->OnError(this);
 }
 
 bool AUAudioInputStream::IsVolumeSettableOnChannel(int channel) {
   Boolean is_settable = false;
   AudioObjectPropertyAddress property_address = {
-      kAudioDevicePropertyVolumeScalar,
-      kAudioDevicePropertyScopeInput,
-      static_cast<UInt32>(channel)
+    kAudioDevicePropertyVolumeScalar,
+    kAudioDevicePropertyScopeInput,
+    static_cast<UInt32>(channel)
   };
-  OSStatus result = AudioObjectIsPropertySettable(
-      input_device_id_, &property_address, &is_settable);
+  OSStatus result = AudioObjectIsPropertySettable(input_device_id_,
+                                                  &property_address,
+                                                  &is_settable);
   return (result == noErr) ? is_settable : false;
 }
 
 }  // namespace media