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-rw-r--r--src/output/osx_output_plugin.c429
1 files changed, 429 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..8091660ab
--- /dev/null
+++ b/src/output/osx_output_plugin.c
@@ -0,0 +1,429 @@
+/*
+ * Copyright (C) 2003-2011 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 "output_api.h"
+
+#include <glib.h>
+#include <AudioUnit/AudioUnit.h>
+#include <CoreServices/CoreServices.h>
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "osx"
+
+struct osx_output {
+ /* configuration settings */
+ OSType component_subtype;
+ /* only applicable with kAudioUnitSubType_HALOutput */
+ const char *device_name;
+
+ AudioUnit au;
+ GMutex *mutex;
+ GCond *condition;
+ char *buffer;
+ size_t buffer_size;
+ size_t pos;
+ size_t len;
+};
+
+/**
+ * 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 void *
+osx_output_init(G_GNUC_UNUSED const struct audio_format *audio_format,
+ G_GNUC_UNUSED const struct config_param *param,
+ G_GNUC_UNUSED GError **error)
+{
+ struct osx_output *oo = g_new(struct osx_output, 1);
+
+ osx_output_configure(oo, param);
+ oo->mutex = g_mutex_new();
+ oo->condition = g_cond_new();
+
+ oo->pos = 0;
+ oo->len = 0;
+ oo->buffer = NULL;
+ oo->buffer_size = 0;
+
+ return oo;
+}
+
+static void osx_output_finish(void *data)
+{
+ struct osx_output *od = data;
+
+ g_free(od->buffer);
+ g_mutex_free(od->mutex);
+ g_cond_free(od->condition);
+ g_free(od);
+}
+
+static void osx_output_cancel(void *data)
+{
+ struct osx_output *od = data;
+
+ g_mutex_lock(od->mutex);
+ od->len = 0;
+ g_mutex_unlock(od->mutex);
+}
+
+static void osx_output_close(void *data)
+{
+ struct osx_output *od = data;
+
+ AudioOutputUnitStop(od->au);
+ AudioUnitUninitialize(od->au);
+ CloseComponent(od->au);
+}
+
+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;
+ size_t bytes_to_copy;
+ size_t trailer_length;
+ size_t dest_pos = 0;
+
+ g_mutex_lock(od->mutex);
+
+ bytes_to_copy = MIN(od->len, buffer_size);
+ buffer_size = bytes_to_copy;
+ od->len -= bytes_to_copy;
+
+ trailer_length = od->buffer_size - od->pos;
+ if (bytes_to_copy > trailer_length) {
+ memcpy((unsigned char*)buffer->mData + dest_pos,
+ od->buffer + od->pos, trailer_length);
+ od->pos = 0;
+ dest_pos += trailer_length;
+ bytes_to_copy -= trailer_length;
+ }
+
+ memcpy((unsigned char*)buffer->mData + dest_pos,
+ od->buffer + od->pos, bytes_to_copy);
+ od->pos += bytes_to_copy;
+
+ if (od->pos >= od->buffer_size)
+ od->pos = 0;
+
+ g_cond_signal(od->condition);
+ g_mutex_unlock(od->mutex);
+
+ buffer->mDataByteSize = buffer_size;
+
+ if (!buffer_size) {
+ g_usleep(1000);
+ }
+
+ return 0;
+}
+
+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 bool
+osx_output_open(void *data, struct audio_format *audio_format, GError **error)
+{
+ struct osx_output *od = data;
+ ComponentDescription desc;
+ Component comp;
+ AURenderCallbackStruct callback;
+ AudioStreamBasicDescription stream_description;
+ OSStatus status;
+ ComponentResult result;
+
+ desc.componentType = kAudioUnitType_Output;
+ desc.componentSubType = od->component_subtype;
+ desc.componentManufacturer = kAudioUnitManufacturer_Apple;
+ desc.componentFlags = 0;
+ desc.componentFlagsMask = 0;
+
+ comp = FindNextComponent(NULL, &desc);
+ if (comp == 0) {
+ g_set_error(error, osx_output_quark(), 0,
+ "Error finding OS X component");
+ return false;
+ }
+
+ status = OpenAComponent(comp, &od->au);
+ if (status != noErr) {
+ g_set_error(error, osx_output_quark(), status,
+ "Unable to open OS X component: %s",
+ GetMacOSStatusCommentString(status));
+ return false;
+ }
+
+ status = AudioUnitInitialize(od->au);
+ if (status != noErr) {
+ CloseComponent(od->au);
+ g_set_error(error, osx_output_quark(), status,
+ "Unable to initialize OS X audio unit: %s",
+ GetMacOSStatusCommentString(status));
+ return false;
+ }
+
+ if (!osx_output_set_device(od, error))
+ return false;
+
+ callback.inputProc = osx_render;
+ callback.inputProcRefCon = od;
+
+ result = AudioUnitSetProperty(od->au,
+ kAudioUnitProperty_SetRenderCallback,
+ kAudioUnitScope_Input, 0,
+ &callback, sizeof(callback));
+ if (result != noErr) {
+ AudioUnitUninitialize(od->au);
+ CloseComponent(od->au);
+ g_set_error(error, osx_output_quark(), result,
+ "unable to set callback for OS X audio unit");
+ return false;
+ }
+
+ 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;
+
+ default:
+ audio_format->format = SAMPLE_FORMAT_S16;
+ stream_description.mBitsPerChannel = 16;
+ 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;
+
+ result = AudioUnitSetProperty(od->au, kAudioUnitProperty_StreamFormat,
+ kAudioUnitScope_Input, 0,
+ &stream_description,
+ sizeof(stream_description));
+ if (result != noErr) {
+ AudioUnitUninitialize(od->au);
+ CloseComponent(od->au);
+ g_set_error(error, osx_output_quark(), result,
+ "Unable to set format on OS X device");
+ return false;
+ }
+
+ /* create a buffer of 1s */
+ od->buffer_size = (audio_format->sample_rate) *
+ audio_format_frame_size(audio_format);
+ od->buffer = g_realloc(od->buffer, od->buffer_size);
+
+ od->pos = 0;
+ od->len = 0;
+
+ status = AudioOutputUnitStart(od->au);
+ if (status != 0) {
+ 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(void *data, const void *chunk, size_t size,
+ G_GNUC_UNUSED GError **error)
+{
+ struct osx_output *od = data;
+ size_t start, nbytes;
+
+ g_mutex_lock(od->mutex);
+
+ while (od->len >= od->buffer_size)
+ /* wait for some free space in the buffer */
+ g_cond_wait(od->condition, od->mutex);
+
+ start = od->pos + od->len;
+ if (start >= od->buffer_size)
+ start -= od->buffer_size;
+
+ nbytes = start < od->pos
+ ? od->pos - start
+ : od->buffer_size - start;
+
+ assert(nbytes > 0);
+
+ if (nbytes > size)
+ nbytes = size;
+
+ memcpy(od->buffer + start, chunk, nbytes);
+ od->len += nbytes;
+
+ g_mutex_unlock(od->mutex);
+
+ return nbytes;
+}
+
+const struct audio_output_plugin osxPlugin = {
+ .name = "osx",
+ .test_default_device = osx_output_test_default_device,
+ .init = osx_output_init,
+ .finish = osx_output_finish,
+ .open = osx_output_open,
+ .close = osx_output_close,
+ .play = osx_output_play,
+ .cancel = osx_output_cancel,
+};