diff options
Diffstat (limited to 'audio/out/ao_coreaudio_device.c')
-rw-r--r-- | audio/out/ao_coreaudio_device.c | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/audio/out/ao_coreaudio_device.c b/audio/out/ao_coreaudio_device.c index 89fd9305f0..a0610a34d5 100644 --- a/audio/out/ao_coreaudio_device.c +++ b/audio/out/ao_coreaudio_device.c @@ -50,6 +50,261 @@ static void audio_pause(struct ao *ao); static void audio_resume(struct ao *ao); static void reset(struct ao *ao); +static bool ca_format_is_digital(AudioStreamBasicDescription asbd) +{ + switch (asbd.mFormatID) + case 'IAC3': + case 'iac3': + case kAudioFormat60958AC3: + case kAudioFormatAC3: + return true; + return false; +} + +static bool ca_stream_supports_digital(struct ao *ao, AudioStreamID stream) +{ + AudioStreamRangedDescription *formats = NULL; + size_t n_formats; + + OSStatus err = + CA_GET_ARY(stream, kAudioStreamPropertyAvailablePhysicalFormats, + &formats, &n_formats); + + CHECK_CA_ERROR("Could not get number of stream formats."); + + for (int i = 0; i < n_formats; i++) { + AudioStreamBasicDescription asbd = formats[i].mFormat; + ca_print_asbd(ao, "supported format:", &(asbd)); + if (ca_format_is_digital(asbd)) { + talloc_free(formats); + return true; + } + } + + talloc_free(formats); +coreaudio_error: + return false; +} + +static bool ca_device_supports_digital(struct ao *ao, AudioDeviceID device) +{ + AudioStreamID *streams = NULL; + size_t n_streams; + + /* Retrieve all the output streams. */ + OSStatus err = + CA_GET_ARY_O(device, kAudioDevicePropertyStreams, &streams, &n_streams); + + CHECK_CA_ERROR("could not get number of streams."); + + for (int i = 0; i < n_streams; i++) { + if (ca_stream_supports_digital(ao, streams[i])) { + talloc_free(streams); + return true; + } + } + + talloc_free(streams); + +coreaudio_error: + return false; +} + +static OSStatus ca_property_listener( + AudioObjectPropertySelector selector, + AudioObjectID object, uint32_t n_addresses, + const AudioObjectPropertyAddress addresses[], + void *data) +{ + void *talloc_ctx = talloc_new(NULL); + + for (int i = 0; i < n_addresses; i++) { + if (addresses[i].mSelector == selector) { + if (data) *(volatile int *)data = 1; + break; + } + } + talloc_free(talloc_ctx); + return noErr; +} + +static OSStatus ca_stream_listener( + AudioObjectID object, uint32_t n_addresses, + const AudioObjectPropertyAddress addresses[], + void *data) +{ + return ca_property_listener(kAudioStreamPropertyPhysicalFormat, + object, n_addresses, addresses, data); +} + +static OSStatus ca_device_listener( + AudioObjectID object, uint32_t n_addresses, + const AudioObjectPropertyAddress addresses[], + void *data) +{ + return ca_property_listener(kAudioDevicePropertyDeviceHasChanged, + object, n_addresses, addresses, data); +} + +static OSStatus ca_lock_device(AudioDeviceID device, pid_t *pid) { + *pid = getpid(); + OSStatus err = CA_SET(device, kAudioDevicePropertyHogMode, pid); + if (err != noErr) + *pid = -1; + + return err; +} + +static OSStatus ca_unlock_device(AudioDeviceID device, pid_t *pid) { + if (*pid == getpid()) { + *pid = -1; + return CA_SET(device, kAudioDevicePropertyHogMode, &pid); + } + return noErr; +} + +static OSStatus ca_change_mixing(struct ao *ao, AudioDeviceID device, + uint32_t val, bool *changed) { + *changed = false; + + AudioObjectPropertyAddress p_addr = (AudioObjectPropertyAddress) { + .mSelector = kAudioDevicePropertySupportsMixing, + .mScope = kAudioObjectPropertyScopeGlobal, + .mElement = kAudioObjectPropertyElementMaster, + }; + + if (AudioObjectHasProperty(device, &p_addr)) { + OSStatus err; + Boolean writeable = 0; + err = CA_SETTABLE(device, kAudioDevicePropertySupportsMixing, + &writeable); + + if (!CHECK_CA_WARN("can't tell if mixing property is settable")) { + return err; + } + + if (!writeable) + return noErr; + + err = CA_SET(device, kAudioDevicePropertySupportsMixing, &val); + if (err != noErr) + return err; + + if (!CHECK_CA_WARN("can't set mix mode")) { + return err; + } + + *changed = true; + } + + return noErr; +} + +static OSStatus ca_disable_mixing(struct ao *ao, + AudioDeviceID device, bool *changed) { + return ca_change_mixing(ao, device, 0, changed); +} + +static OSStatus ca_enable_mixing(struct ao *ao, + AudioDeviceID device, bool changed) { + if (changed) { + bool dont_care = false; + return ca_change_mixing(ao, device, 1, &dont_care); + } + + return noErr; +} + +static OSStatus ca_change_device_listening(AudioDeviceID device, + void *flag, bool enabled) +{ + AudioObjectPropertyAddress p_addr = (AudioObjectPropertyAddress) { + .mSelector = kAudioDevicePropertyDeviceHasChanged, + .mScope = kAudioObjectPropertyScopeGlobal, + .mElement = kAudioObjectPropertyElementMaster, + }; + + if (enabled) { + return AudioObjectAddPropertyListener( + device, &p_addr, ca_device_listener, flag); + } else { + return AudioObjectRemovePropertyListener( + device, &p_addr, ca_device_listener, flag); + } +} + +static OSStatus ca_enable_device_listener(AudioDeviceID device, void *flag) { + return ca_change_device_listening(device, flag, true); +} + +static OSStatus ca_disable_device_listener(AudioDeviceID device, void *flag) { + return ca_change_device_listening(device, flag, false); +} + +static bool ca_change_format(struct ao *ao, AudioStreamID stream, + AudioStreamBasicDescription change_format) +{ + OSStatus err = noErr; + AudioObjectPropertyAddress p_addr; + volatile int stream_format_changed = 0; + + ca_print_asbd(ao, "setting stream format:", &change_format); + + /* Install the callback. */ + p_addr = (AudioObjectPropertyAddress) { + .mSelector = kAudioStreamPropertyPhysicalFormat, + .mScope = kAudioObjectPropertyScopeGlobal, + .mElement = kAudioObjectPropertyElementMaster, + }; + + err = AudioObjectAddPropertyListener(stream, &p_addr, ca_stream_listener, + (void *)&stream_format_changed); + if (!CHECK_CA_WARN("can't add property listener during format change")) { + return false; + } + + /* Change the format. */ + err = CA_SET(stream, kAudioStreamPropertyPhysicalFormat, &change_format); + if (!CHECK_CA_WARN("error changing physical format")) { + return false; + } + + /* The AudioStreamSetProperty is not only asynchronious, + * it is also not Atomic, in its behaviour. + * Therefore we check 5 times before we really give up. */ + bool format_set = false; + for (int i = 0; !format_set && i < 5; i++) { + for (int j = 0; !stream_format_changed && j < 50; j++) + mp_sleep_us(10000); + + if (stream_format_changed) { + stream_format_changed = 0; + } else { + MP_VERBOSE(ao, "reached timeout\n"); + } + + AudioStreamBasicDescription actual_format; + err = CA_GET(stream, kAudioStreamPropertyPhysicalFormat, &actual_format); + + ca_print_asbd(ao, "actual format in use:", &actual_format); + if (actual_format.mSampleRate == change_format.mSampleRate && + actual_format.mFormatID == change_format.mFormatID && + actual_format.mFramesPerPacket == change_format.mFramesPerPacket) { + format_set = true; + } + } + + err = AudioObjectRemovePropertyListener(stream, &p_addr, ca_stream_listener, + (void *)&stream_format_changed); + + if (!CHECK_CA_WARN("can't remove property listener")) { + return false; + } + + return format_set; +} + + struct priv { AudioDeviceID device; // selected device |