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Diffstat (limited to 'src/output/plugins/OSXOutputPlugin.cxx')
| -rw-r--r-- | src/output/plugins/OSXOutputPlugin.cxx | 428 |
1 files changed, 428 insertions, 0 deletions
diff --git a/src/output/plugins/OSXOutputPlugin.cxx b/src/output/plugins/OSXOutputPlugin.cxx new file mode 100644 index 000000000..c247336d7 --- /dev/null +++ b/src/output/plugins/OSXOutputPlugin.cxx @@ -0,0 +1,428 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "OSXOutputPlugin.hxx" +#include "../OutputAPI.hxx" +#include "util/DynamicFifoBuffer.hxx" +#include "util/Error.hxx" +#include "util/Domain.hxx" +#include "thread/Mutex.hxx" +#include "thread/Cond.hxx" +#include "system/ByteOrder.hxx" +#include "Log.hxx" + +#include <CoreAudio/AudioHardware.h> +#include <AudioUnit/AudioUnit.h> +#include <CoreServices/CoreServices.h> + +struct OSXOutput { + struct audio_output base; + + /* configuration settings */ + OSType component_subtype; + /* only applicable with kAudioUnitSubType_HALOutput */ + const char *device_name; + + AudioUnit au; + Mutex mutex; + Cond condition; + + DynamicFifoBuffer<uint8_t> *buffer; +}; + +static constexpr Domain osx_output_domain("osx_output"); + +static bool +osx_output_test_default_device(void) +{ + /* on a Mac, this is always the default plugin, if nothing + else is configured */ + return true; +} + +static void +osx_output_configure(OSXOutput *oo, const config_param ¶m) +{ + const char *device = param.GetBlockValue("device"); + + if (device == NULL || 0 == strcmp(device, "default")) { + oo->component_subtype = kAudioUnitSubType_DefaultOutput; + oo->device_name = NULL; + } + else if (0 == strcmp(device, "system")) { + oo->component_subtype = kAudioUnitSubType_SystemOutput; + oo->device_name = NULL; + } + else { + oo->component_subtype = kAudioUnitSubType_HALOutput; + /* XXX am I supposed to strdup() this? */ + oo->device_name = device; + } +} + +static struct audio_output * +osx_output_init(const config_param ¶m, Error &error) +{ + OSXOutput *oo = new OSXOutput(); + if (!ao_base_init(&oo->base, &osx_output_plugin, param, error)) { + delete oo; + return NULL; + } + + osx_output_configure(oo, param); + + return &oo->base; +} + +static void +osx_output_finish(struct audio_output *ao) +{ + OSXOutput *oo = (OSXOutput *)ao; + + delete oo; +} + +static bool +osx_output_set_device(OSXOutput *oo, Error &error) +{ + bool ret = true; + OSStatus status; + UInt32 size, numdevices; + AudioDeviceID *deviceids = NULL; + char name[256]; + unsigned int i; + + if (oo->component_subtype != kAudioUnitSubType_HALOutput) + goto done; + + /* how many audio devices are there? */ + status = AudioHardwareGetPropertyInfo(kAudioHardwarePropertyDevices, + &size, + NULL); + if (status != noErr) { + error.Format(osx_output_domain, status, + "Unable to determine number of OS X audio devices: %s", + GetMacOSStatusCommentString(status)); + ret = false; + goto done; + } + + /* what are the available audio device IDs? */ + numdevices = size / sizeof(AudioDeviceID); + deviceids = new AudioDeviceID[numdevices]; + status = AudioHardwareGetProperty(kAudioHardwarePropertyDevices, + &size, + deviceids); + if (status != noErr) { + error.Format(osx_output_domain, status, + "Unable to determine OS X audio device IDs: %s", + GetMacOSStatusCommentString(status)); + ret = false; + goto done; + } + + /* which audio device matches oo->device_name? */ + for (i = 0; i < numdevices; i++) { + size = sizeof(name); + status = AudioDeviceGetProperty(deviceids[i], 0, false, + kAudioDevicePropertyDeviceName, + &size, name); + if (status != noErr) { + error.Format(osx_output_domain, status, + "Unable to determine OS X device name " + "(device %u): %s", + (unsigned int) deviceids[i], + GetMacOSStatusCommentString(status)); + ret = false; + goto done; + } + if (strcmp(oo->device_name, name) == 0) { + FormatDebug(osx_output_domain, + "found matching device: ID=%u, name=%s", + (unsigned)deviceids[i], name); + break; + } + } + if (i == numdevices) { + FormatWarning(osx_output_domain, + "Found no audio device with name '%s' " + "(will use default audio device)", + oo->device_name); + goto done; + } + + status = AudioUnitSetProperty(oo->au, + kAudioOutputUnitProperty_CurrentDevice, + kAudioUnitScope_Global, + 0, + &(deviceids[i]), + sizeof(AudioDeviceID)); + if (status != noErr) { + error.Format(osx_output_domain, status, + "Unable to set OS X audio output device: %s", + GetMacOSStatusCommentString(status)); + ret = false; + goto done; + } + + FormatDebug(osx_output_domain, + "set OS X audio output device ID=%u, name=%s", + (unsigned)deviceids[i], name); + +done: + delete[] deviceids; + return ret; +} + +static OSStatus +osx_render(void *vdata, + gcc_unused AudioUnitRenderActionFlags *io_action_flags, + gcc_unused const AudioTimeStamp *in_timestamp, + gcc_unused UInt32 in_bus_number, + gcc_unused UInt32 in_number_frames, + AudioBufferList *buffer_list) +{ + OSXOutput *od = (OSXOutput *) vdata; + AudioBuffer *buffer = &buffer_list->mBuffers[0]; + size_t buffer_size = buffer->mDataByteSize; + + assert(od->buffer != NULL); + + od->mutex.lock(); + + auto src = od->buffer->Read(); + if (!src.IsEmpty()) { + if (src.size > buffer_size) + src.size = buffer_size; + + memcpy(buffer->mData, src.data, src.size); + od->buffer->Consume(src.size); + } + + od->condition.signal(); + od->mutex.unlock(); + + buffer->mDataByteSize = src.size; + + unsigned i; + for (i = 1; i < buffer_list->mNumberBuffers; ++i) { + buffer = &buffer_list->mBuffers[i]; + buffer->mDataByteSize = 0; + } + + return 0; +} + +static bool +osx_output_enable(struct audio_output *ao, Error &error) +{ + OSXOutput *oo = (OSXOutput *)ao; + + ComponentDescription desc; + desc.componentType = kAudioUnitType_Output; + desc.componentSubType = oo->component_subtype; + desc.componentManufacturer = kAudioUnitManufacturer_Apple; + desc.componentFlags = 0; + desc.componentFlagsMask = 0; + + Component comp = FindNextComponent(NULL, &desc); + if (comp == 0) { + error.Set(osx_output_domain, + "Error finding OS X component"); + return false; + } + + OSStatus status = OpenAComponent(comp, &oo->au); + if (status != noErr) { + error.Format(osx_output_domain, status, + "Unable to open OS X component: %s", + GetMacOSStatusCommentString(status)); + return false; + } + + if (!osx_output_set_device(oo, error)) { + CloseComponent(oo->au); + return false; + } + + AURenderCallbackStruct callback; + callback.inputProc = osx_render; + callback.inputProcRefCon = oo; + + ComponentResult result = + AudioUnitSetProperty(oo->au, + kAudioUnitProperty_SetRenderCallback, + kAudioUnitScope_Input, 0, + &callback, sizeof(callback)); + if (result != noErr) { + CloseComponent(oo->au); + error.Set(osx_output_domain, result, + "unable to set callback for OS X audio unit"); + return false; + } + + return true; +} + +static void +osx_output_disable(struct audio_output *ao) +{ + OSXOutput *oo = (OSXOutput *)ao; + + CloseComponent(oo->au); +} + +static void +osx_output_cancel(struct audio_output *ao) +{ + OSXOutput *od = (OSXOutput *)ao; + + const ScopeLock protect(od->mutex); + od->buffer->Clear(); +} + +static void +osx_output_close(struct audio_output *ao) +{ + OSXOutput *od = (OSXOutput *)ao; + + AudioOutputUnitStop(od->au); + AudioUnitUninitialize(od->au); + + delete od->buffer; +} + +static bool +osx_output_open(struct audio_output *ao, AudioFormat &audio_format, + Error &error) +{ + OSXOutput *od = (OSXOutput *)ao; + + AudioStreamBasicDescription stream_description; + stream_description.mSampleRate = audio_format.sample_rate; + stream_description.mFormatID = kAudioFormatLinearPCM; + stream_description.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger; + + switch (audio_format.format) { + case SampleFormat::S8: + stream_description.mBitsPerChannel = 8; + break; + + case SampleFormat::S16: + stream_description.mBitsPerChannel = 16; + break; + + case SampleFormat::S32: + stream_description.mBitsPerChannel = 32; + break; + + default: + audio_format.format = SampleFormat::S32; + stream_description.mBitsPerChannel = 32; + break; + } + + if (IsBigEndian()) + stream_description.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian; + + stream_description.mBytesPerPacket = audio_format.GetFrameSize(); + stream_description.mFramesPerPacket = 1; + stream_description.mBytesPerFrame = stream_description.mBytesPerPacket; + stream_description.mChannelsPerFrame = audio_format.channels; + + ComponentResult result = + AudioUnitSetProperty(od->au, kAudioUnitProperty_StreamFormat, + kAudioUnitScope_Input, 0, + &stream_description, + sizeof(stream_description)); + if (result != noErr) { + error.Set(osx_output_domain, result, + "Unable to set format on OS X device"); + return false; + } + + OSStatus status = AudioUnitInitialize(od->au); + if (status != noErr) { + error.Format(osx_output_domain, status, + "Unable to initialize OS X audio unit: %s", + GetMacOSStatusCommentString(status)); + return false; + } + + /* create a buffer of 1s */ + od->buffer = new DynamicFifoBuffer<uint8_t>(audio_format.sample_rate * + audio_format.GetFrameSize()); + + status = AudioOutputUnitStart(od->au); + if (status != 0) { + AudioUnitUninitialize(od->au); + error.Format(osx_output_domain, status, + "unable to start audio output: %s", + GetMacOSStatusCommentString(status)); + return false; + } + + return true; +} + +static size_t +osx_output_play(struct audio_output *ao, const void *chunk, size_t size, + gcc_unused Error &error) +{ + OSXOutput *od = (OSXOutput *)ao; + + const ScopeLock protect(od->mutex); + + DynamicFifoBuffer<uint8_t>::Range dest; + while (true) { + dest = od->buffer->Write(); + if (!dest.IsEmpty()) + break; + + /* wait for some free space in the buffer */ + od->condition.wait(od->mutex); + } + + if (size > dest.size) + size = dest.size; + + memcpy(dest.data, chunk, size); + od->buffer->Append(size); + + return size; +} + +const struct audio_output_plugin osx_output_plugin = { + "osx", + osx_output_test_default_device, + osx_output_init, + osx_output_finish, + osx_output_enable, + osx_output_disable, + osx_output_open, + osx_output_close, + nullptr, + nullptr, + osx_output_play, + nullptr, + osx_output_cancel, + nullptr, + nullptr, +}; |