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-rw-r--r--src/output/plugins/OSXOutputPlugin.cxx431
1 files changed, 431 insertions, 0 deletions
diff --git a/src/output/plugins/OSXOutputPlugin.cxx b/src/output/plugins/OSXOutputPlugin.cxx
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+++ b/src/output/plugins/OSXOutputPlugin.cxx
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+/*
+ * 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 {
+ AudioOutput 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;
+
+ OSXOutput()
+ :base(osx_output_plugin) {}
+};
+
+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 &param)
+{
+ 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 AudioOutput *
+osx_output_init(const config_param &param, Error &error)
+{
+ OSXOutput *oo = new OSXOutput();
+ if (!oo->base.Configure(param, error)) {
+ delete oo;
+ return NULL;
+ }
+
+ osx_output_configure(oo, param);
+
+ return &oo->base;
+}
+
+static void
+osx_output_finish(AudioOutput *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(AudioOutput *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(AudioOutput *ao)
+{
+ OSXOutput *oo = (OSXOutput *)ao;
+
+ CloseComponent(oo->au);
+}
+
+static void
+osx_output_cancel(AudioOutput *ao)
+{
+ OSXOutput *od = (OSXOutput *)ao;
+
+ const ScopeLock protect(od->mutex);
+ od->buffer->Clear();
+}
+
+static void
+osx_output_close(AudioOutput *ao)
+{
+ OSXOutput *od = (OSXOutput *)ao;
+
+ AudioOutputUnitStop(od->au);
+ AudioUnitUninitialize(od->au);
+
+ delete od->buffer;
+}
+
+static bool
+osx_output_open(AudioOutput *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(AudioOutput *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 AudioOutputPlugin 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,
+};