diff options
Diffstat (limited to 'src/output/osx_output_plugin.c')
| -rw-r--r-- | src/output/osx_output_plugin.c | 434 |
1 files changed, 434 insertions, 0 deletions
diff --git a/src/output/osx_output_plugin.c b/src/output/osx_output_plugin.c new file mode 100644 index 000000000..fbba81749 --- /dev/null +++ b/src/output/osx_output_plugin.c @@ -0,0 +1,434 @@ +/* + * Copyright (C) 2003-2012 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 "osx_output_plugin.h" +#include "output_api.h" +#include "fifo_buffer.h" + +#include <glib.h> +#include <CoreAudio/AudioHardware.h> +#include <AudioUnit/AudioUnit.h> +#include <CoreServices/CoreServices.h> + +#undef G_LOG_DOMAIN +#define G_LOG_DOMAIN "osx" + +struct osx_output { + struct audio_output base; + + /* configuration settings */ + OSType component_subtype; + /* only applicable with kAudioUnitSubType_HALOutput */ + const char *device_name; + + AudioUnit au; + GMutex *mutex; + GCond *condition; + + struct fifo_buffer *buffer; +}; + +/** + * The quark used for GError.domain. + */ +static inline GQuark +osx_output_quark(void) +{ + return g_quark_from_static_string("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(struct osx_output *oo, const struct config_param *param) +{ + const char *device = config_get_block_string(param, "device", NULL); + + 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 g_strdup() this? */ + oo->device_name = device; + } +} + +static struct audio_output * +osx_output_init(const struct config_param *param, GError **error_r) +{ + struct osx_output *oo = g_new(struct osx_output, 1); + if (!ao_base_init(&oo->base, &osx_output_plugin, param, error_r)) { + g_free(oo); + return NULL; + } + + osx_output_configure(oo, param); + oo->mutex = g_mutex_new(); + oo->condition = g_cond_new(); + + return &oo->base; +} + +static void +osx_output_finish(struct audio_output *ao) +{ + struct osx_output *od = (struct osx_output *)ao; + + g_mutex_free(od->mutex); + g_cond_free(od->condition); + g_free(od); +} + +static bool +osx_output_set_device(struct osx_output *oo, GError **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) { + g_set_error(error, osx_output_quark(), 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 = g_malloc(size); + status = AudioHardwareGetProperty(kAudioHardwarePropertyDevices, + &size, + deviceids); + if (status != noErr) { + g_set_error(error, osx_output_quark(), 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) { + g_set_error(error, osx_output_quark(), 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) { + g_debug("found matching device: ID=%u, name=%s", + (unsigned int) deviceids[i], name); + break; + } + } + if (i == numdevices) { + g_warning("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) { + g_set_error(error, osx_output_quark(), status, + "Unable to set OS X audio output device: %s", + GetMacOSStatusCommentString(status)); + ret = false; + goto done; + } + g_debug("set OS X audio output device ID=%u, name=%s", + (unsigned int) deviceids[i], name); + +done: + if (deviceids != NULL) + g_free(deviceids); + return ret; +} + +static OSStatus +osx_render(void *vdata, + G_GNUC_UNUSED AudioUnitRenderActionFlags *io_action_flags, + G_GNUC_UNUSED const AudioTimeStamp *in_timestamp, + G_GNUC_UNUSED UInt32 in_bus_number, + G_GNUC_UNUSED UInt32 in_number_frames, + AudioBufferList *buffer_list) +{ + struct osx_output *od = (struct osx_output *) vdata; + AudioBuffer *buffer = &buffer_list->mBuffers[0]; + size_t buffer_size = buffer->mDataByteSize; + + assert(od->buffer != NULL); + + g_mutex_lock(od->mutex); + + size_t nbytes; + const void *src = fifo_buffer_read(od->buffer, &nbytes); + + if (src != NULL) { + if (nbytes > buffer_size) + nbytes = buffer_size; + + memcpy(buffer->mData, src, nbytes); + fifo_buffer_consume(od->buffer, nbytes); + } else + nbytes = 0; + + g_cond_signal(od->condition); + g_mutex_unlock(od->mutex); + + if (nbytes < buffer_size) + memset((unsigned char*)buffer->mData + nbytes, 0, + buffer_size - nbytes); + + return 0; +} + +static bool +osx_output_enable(struct audio_output *ao, GError **error_r) +{ + struct osx_output *oo = (struct osx_output *)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) { + g_set_error(error_r, osx_output_quark(), 0, + "Error finding OS X component"); + return false; + } + + OSStatus status = OpenAComponent(comp, &oo->au); + if (status != noErr) { + g_set_error(error_r, osx_output_quark(), status, + "Unable to open OS X component: %s", + GetMacOSStatusCommentString(status)); + return false; + } + + if (!osx_output_set_device(oo, error_r)) { + 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); + g_set_error(error_r, osx_output_quark(), result, + "unable to set callback for OS X audio unit"); + return false; + } + + return true; +} + +static void +osx_output_disable(struct audio_output *ao) +{ + struct osx_output *oo = (struct osx_output *)ao; + + CloseComponent(oo->au); +} + +static void +osx_output_cancel(struct audio_output *ao) +{ + struct osx_output *od = (struct osx_output *)ao; + + g_mutex_lock(od->mutex); + fifo_buffer_clear(od->buffer); + g_mutex_unlock(od->mutex); +} + +static void +osx_output_close(struct audio_output *ao) +{ + struct osx_output *od = (struct osx_output *)ao; + + AudioOutputUnitStop(od->au); + AudioUnitUninitialize(od->au); + + fifo_buffer_free(od->buffer); +} + +static bool +osx_output_open(struct audio_output *ao, struct audio_format *audio_format, GError **error) +{ + struct osx_output *od = (struct osx_output *)ao; + + AudioStreamBasicDescription stream_description; + stream_description.mSampleRate = audio_format->sample_rate; + stream_description.mFormatID = kAudioFormatLinearPCM; + stream_description.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger; + + switch (audio_format->format) { + case SAMPLE_FORMAT_S8: + stream_description.mBitsPerChannel = 8; + break; + + case SAMPLE_FORMAT_S16: + stream_description.mBitsPerChannel = 16; + break; + + case SAMPLE_FORMAT_S32: + stream_description.mBitsPerChannel = 32; + break; + + default: + audio_format->format = SAMPLE_FORMAT_S32; + stream_description.mBitsPerChannel = 32; + break; + } + +#if G_BYTE_ORDER == G_BIG_ENDIAN + stream_description.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian; +#endif + + stream_description.mBytesPerPacket = + audio_format_frame_size(audio_format); + 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) { + g_set_error(error, osx_output_quark(), result, + "Unable to set format on OS X device"); + return false; + } + + OSStatus status = AudioUnitInitialize(od->au); + if (status != noErr) { + g_set_error(error, osx_output_quark(), status, + "Unable to initialize OS X audio unit: %s", + GetMacOSStatusCommentString(status)); + return false; + } + + /* create a buffer of 1s */ + od->buffer = fifo_buffer_new(audio_format->sample_rate * + audio_format_frame_size(audio_format)); + + status = AudioOutputUnitStart(od->au); + if (status != 0) { + AudioUnitUninitialize(od->au); + g_set_error(error, osx_output_quark(), 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, + G_GNUC_UNUSED GError **error) +{ + struct osx_output *od = (struct osx_output *)ao; + + g_mutex_lock(od->mutex); + + void *dest; + size_t max_length; + + while (true) { + dest = fifo_buffer_write(od->buffer, &max_length); + if (dest != NULL) + break; + + /* wait for some free space in the buffer */ + g_cond_wait(od->condition, od->mutex); + } + + if (size > max_length) + size = max_length; + + memcpy(dest, chunk, size); + fifo_buffer_append(od->buffer, size); + + g_mutex_unlock(od->mutex); + + return size; +} + +const struct audio_output_plugin osx_output_plugin = { + .name = "osx", + .test_default_device = osx_output_test_default_device, + .init = osx_output_init, + .finish = osx_output_finish, + .enable = osx_output_enable, + .disable = osx_output_disable, + .open = osx_output_open, + .close = osx_output_close, + .play = osx_output_play, + .cancel = osx_output_cancel, +}; 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