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media / audio / apple / audio_manager_apple.cc [blame]
// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/audio/apple/audio_manager_apple.h"
#include <memory>
#include <utility>
#include "base/apple/osstatus_logging.h"
namespace media {
AudioManagerApple::AudioManagerApple(std::unique_ptr<AudioThread> audio_thread,
AudioLogFactory* audio_log_factory)
: AudioManagerBase(std::move(audio_thread), audio_log_factory) {}
AudioManagerApple::~AudioManagerApple() = default;
// static
std::unique_ptr<ScopedAudioChannelLayout>
AudioManagerApple::GetOutputDeviceChannelLayout(AudioUnit audio_unit) {
UInt32 size = 0;
// Note: We don't use kAudioDevicePropertyPreferredChannelLayout on the device
// because it is not available on all devices.
OSStatus result = AudioUnitGetPropertyInfo(
audio_unit, kAudioUnitProperty_AudioChannelLayout, kAudioUnitScope_Output,
0, &size, nullptr);
if (result != noErr) {
OSSTATUS_DLOG(ERROR, result)
<< "Failed to get property info for AudioUnit channel layout.";
return nullptr;
}
auto output_layout = std::make_unique<ScopedAudioChannelLayout>(size);
result = AudioUnitGetProperty(
audio_unit, kAudioUnitProperty_AudioChannelLayout, kAudioUnitScope_Output,
0, output_layout->layout(), &size);
if (result != noErr) {
OSSTATUS_LOG(ERROR, result) << "Failed to get AudioUnit channel layout.";
return nullptr;
}
// We don't want to have to know about all channel layout tags, so force
// system to give us the channel descriptions from the bitmap or tag if
// necessary.
const AudioChannelLayoutTag tag = output_layout->layout()->mChannelLayoutTag;
if (tag == kAudioChannelLayoutTag_UseChannelDescriptions) {
return output_layout;
}
if (tag == kAudioChannelLayoutTag_UseChannelBitmap) {
result = AudioFormatGetPropertyInfo(
kAudioFormatProperty_ChannelLayoutForBitmap, sizeof(UInt32),
&output_layout->layout()->mChannelBitmap, &size);
} else {
result =
AudioFormatGetPropertyInfo(kAudioFormatProperty_ChannelLayoutForTag,
sizeof(AudioChannelLayoutTag), &tag, &size);
}
if (result != noErr || !size) {
OSSTATUS_DLOG(ERROR, result)
<< "Failed to get AudioFormat property info, size=" << size;
return nullptr;
}
auto new_layout = std::make_unique<ScopedAudioChannelLayout>(size);
if (tag == kAudioChannelLayoutTag_UseChannelBitmap) {
result = AudioFormatGetProperty(
kAudioFormatProperty_ChannelLayoutForBitmap, sizeof(UInt32),
&output_layout->layout()->mChannelBitmap, &size, new_layout->layout());
} else {
result = AudioFormatGetProperty(kAudioFormatProperty_ChannelLayoutForTag,
sizeof(AudioChannelLayoutTag), &tag, &size,
new_layout->layout());
}
if (result != noErr) {
OSSTATUS_DLOG(ERROR, result) << "Failed to get AudioFormat property.";
return nullptr;
}
return new_layout;
}
} // namespace media