output/osx: convert to C++
This commit is contained in:
Max Kellermann
437
src/output/OSXOutputPlugin.cxx
Normal file
437
src/output/OSXOutputPlugin.cxx
Normal file
@@ -0,0 +1,437 @@
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/*
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "OSXOutputPlugin.hxx"
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#include "output_api.h"
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#include "util/fifo_buffer.h"
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#include "thread/Mutex.hxx"
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#include "thread/Cond.hxx"
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#include <glib.h>
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#include <CoreAudio/AudioHardware.h>
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#include <AudioUnit/AudioUnit.h>
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#include <CoreServices/CoreServices.h>
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#undef G_LOG_DOMAIN
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#define G_LOG_DOMAIN "osx"
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struct OSXOutput {
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struct audio_output base;
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/* configuration settings */
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OSType component_subtype;
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/* only applicable with kAudioUnitSubType_HALOutput */
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const char *device_name;
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AudioUnit au;
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Mutex mutex;
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Cond condition;
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struct fifo_buffer *buffer;
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};
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/**
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* The quark used for GError.domain.
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*/
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static inline GQuark
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osx_output_quark(void)
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{
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return g_quark_from_static_string("osx_output");
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}
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static bool
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osx_output_test_default_device(void)
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{
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/* on a Mac, this is always the default plugin, if nothing
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else is configured */
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return true;
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}
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static void
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osx_output_configure(OSXOutput *oo, const struct config_param *param)
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{
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const char *device = config_get_block_string(param, "device", NULL);
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if (device == NULL || 0 == strcmp(device, "default")) {
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oo->component_subtype = kAudioUnitSubType_DefaultOutput;
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oo->device_name = NULL;
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}
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else if (0 == strcmp(device, "system")) {
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oo->component_subtype = kAudioUnitSubType_SystemOutput;
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oo->device_name = NULL;
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}
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else {
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oo->component_subtype = kAudioUnitSubType_HALOutput;
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/* XXX am I supposed to g_strdup() this? */
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oo->device_name = device;
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}
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}
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static struct audio_output *
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osx_output_init(const struct config_param *param, GError **error_r)
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{
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OSXOutput *oo = new OSXOutput();
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if (!ao_base_init(&oo->base, &osx_output_plugin, param, error_r)) {
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delete oo;
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return NULL;
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}
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osx_output_configure(oo, param);
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return &oo->base;
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}
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static void
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osx_output_finish(struct audio_output *ao)
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{
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OSXOutput *oo = (OSXOutput *)ao;
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delete oo;
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}
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static bool
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osx_output_set_device(OSXOutput *oo, GError **error)
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{
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bool ret = true;
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OSStatus status;
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UInt32 size, numdevices;
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AudioDeviceID *deviceids = NULL;
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char name[256];
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unsigned int i;
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if (oo->component_subtype != kAudioUnitSubType_HALOutput)
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goto done;
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/* how many audio devices are there? */
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status = AudioHardwareGetPropertyInfo(kAudioHardwarePropertyDevices,
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&size,
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NULL);
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if (status != noErr) {
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g_set_error(error, osx_output_quark(), status,
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"Unable to determine number of OS X audio devices: %s",
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GetMacOSStatusCommentString(status));
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ret = false;
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goto done;
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}
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/* what are the available audio device IDs? */
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numdevices = size / sizeof(AudioDeviceID);
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deviceids = new AudioDeviceID[numdevices];
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status = AudioHardwareGetProperty(kAudioHardwarePropertyDevices,
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&size,
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deviceids);
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if (status != noErr) {
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g_set_error(error, osx_output_quark(), status,
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"Unable to determine OS X audio device IDs: %s",
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GetMacOSStatusCommentString(status));
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ret = false;
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goto done;
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}
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/* which audio device matches oo->device_name? */
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for (i = 0; i < numdevices; i++) {
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size = sizeof(name);
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status = AudioDeviceGetProperty(deviceids[i], 0, false,
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kAudioDevicePropertyDeviceName,
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&size, name);
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if (status != noErr) {
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g_set_error(error, osx_output_quark(), status,
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"Unable to determine OS X device name "
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"(device %u): %s",
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(unsigned int) deviceids[i],
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GetMacOSStatusCommentString(status));
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ret = false;
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goto done;
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}
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if (strcmp(oo->device_name, name) == 0) {
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g_debug("found matching device: ID=%u, name=%s",
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(unsigned int) deviceids[i], name);
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break;
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}
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}
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if (i == numdevices) {
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g_warning("Found no audio device with name '%s' "
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"(will use default audio device)",
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oo->device_name);
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goto done;
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}
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status = AudioUnitSetProperty(oo->au,
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kAudioOutputUnitProperty_CurrentDevice,
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kAudioUnitScope_Global,
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0,
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&(deviceids[i]),
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sizeof(AudioDeviceID));
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if (status != noErr) {
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g_set_error(error, osx_output_quark(), status,
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"Unable to set OS X audio output device: %s",
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GetMacOSStatusCommentString(status));
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ret = false;
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goto done;
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}
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g_debug("set OS X audio output device ID=%u, name=%s",
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(unsigned int) deviceids[i], name);
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done:
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delete[] deviceids;
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return ret;
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}
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static OSStatus
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osx_render(void *vdata,
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G_GNUC_UNUSED AudioUnitRenderActionFlags *io_action_flags,
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G_GNUC_UNUSED const AudioTimeStamp *in_timestamp,
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G_GNUC_UNUSED UInt32 in_bus_number,
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G_GNUC_UNUSED UInt32 in_number_frames,
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AudioBufferList *buffer_list)
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{
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OSXOutput *od = (OSXOutput *) vdata;
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AudioBuffer *buffer = &buffer_list->mBuffers[0];
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size_t buffer_size = buffer->mDataByteSize;
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assert(od->buffer != NULL);
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od->mutex.lock();
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size_t nbytes;
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const void *src = fifo_buffer_read(od->buffer, &nbytes);
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if (src != NULL) {
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if (nbytes > buffer_size)
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nbytes = buffer_size;
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memcpy(buffer->mData, src, nbytes);
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fifo_buffer_consume(od->buffer, nbytes);
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} else
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nbytes = 0;
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od->condition.signal();
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od->mutex.unlock();
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buffer->mDataByteSize = nbytes;
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unsigned i;
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for (i = 1; i < buffer_list->mNumberBuffers; ++i) {
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buffer = &buffer_list->mBuffers[i];
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buffer->mDataByteSize = 0;
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}
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return 0;
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}
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static bool
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osx_output_enable(struct audio_output *ao, GError **error_r)
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{
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OSXOutput *oo = (OSXOutput *)ao;
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ComponentDescription desc;
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desc.componentType = kAudioUnitType_Output;
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desc.componentSubType = oo->component_subtype;
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desc.componentManufacturer = kAudioUnitManufacturer_Apple;
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desc.componentFlags = 0;
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desc.componentFlagsMask = 0;
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Component comp = FindNextComponent(NULL, &desc);
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if (comp == 0) {
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g_set_error(error_r, osx_output_quark(), 0,
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"Error finding OS X component");
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return false;
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}
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OSStatus status = OpenAComponent(comp, &oo->au);
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if (status != noErr) {
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g_set_error(error_r, osx_output_quark(), status,
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"Unable to open OS X component: %s",
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GetMacOSStatusCommentString(status));
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return false;
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}
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if (!osx_output_set_device(oo, error_r)) {
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CloseComponent(oo->au);
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return false;
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}
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AURenderCallbackStruct callback;
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callback.inputProc = osx_render;
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callback.inputProcRefCon = oo;
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ComponentResult result =
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AudioUnitSetProperty(oo->au,
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kAudioUnitProperty_SetRenderCallback,
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kAudioUnitScope_Input, 0,
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&callback, sizeof(callback));
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if (result != noErr) {
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CloseComponent(oo->au);
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g_set_error(error_r, osx_output_quark(), result,
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"unable to set callback for OS X audio unit");
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return false;
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}
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return true;
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}
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static void
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osx_output_disable(struct audio_output *ao)
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{
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OSXOutput *oo = (OSXOutput *)ao;
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CloseComponent(oo->au);
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}
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static void
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osx_output_cancel(struct audio_output *ao)
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{
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OSXOutput *od = (OSXOutput *)ao;
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const ScopeLock protect(od->mutex);
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fifo_buffer_clear(od->buffer);
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}
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static void
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osx_output_close(struct audio_output *ao)
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{
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OSXOutput *od = (OSXOutput *)ao;
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AudioOutputUnitStop(od->au);
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AudioUnitUninitialize(od->au);
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fifo_buffer_free(od->buffer);
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}
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static bool
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osx_output_open(struct audio_output *ao, struct audio_format *audio_format, GError **error)
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{
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OSXOutput *od = (OSXOutput *)ao;
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AudioStreamBasicDescription stream_description;
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stream_description.mSampleRate = audio_format->sample_rate;
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stream_description.mFormatID = kAudioFormatLinearPCM;
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stream_description.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger;
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switch (audio_format->format) {
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case SAMPLE_FORMAT_S8:
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stream_description.mBitsPerChannel = 8;
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break;
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case SAMPLE_FORMAT_S16:
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stream_description.mBitsPerChannel = 16;
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break;
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case SAMPLE_FORMAT_S32:
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stream_description.mBitsPerChannel = 32;
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break;
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default:
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audio_format->format = SAMPLE_FORMAT_S32;
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stream_description.mBitsPerChannel = 32;
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break;
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}
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#if G_BYTE_ORDER == G_BIG_ENDIAN
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stream_description.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian;
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#endif
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stream_description.mBytesPerPacket =
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audio_format_frame_size(audio_format);
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stream_description.mFramesPerPacket = 1;
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stream_description.mBytesPerFrame = stream_description.mBytesPerPacket;
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stream_description.mChannelsPerFrame = audio_format->channels;
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ComponentResult result =
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AudioUnitSetProperty(od->au, kAudioUnitProperty_StreamFormat,
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kAudioUnitScope_Input, 0,
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&stream_description,
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sizeof(stream_description));
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if (result != noErr) {
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g_set_error(error, osx_output_quark(), result,
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"Unable to set format on OS X device");
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return false;
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}
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OSStatus status = AudioUnitInitialize(od->au);
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if (status != noErr) {
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g_set_error(error, osx_output_quark(), status,
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"Unable to initialize OS X audio unit: %s",
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GetMacOSStatusCommentString(status));
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return false;
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}
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/* create a buffer of 1s */
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od->buffer = fifo_buffer_new(audio_format->sample_rate *
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audio_format_frame_size(audio_format));
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status = AudioOutputUnitStart(od->au);
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if (status != 0) {
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AudioUnitUninitialize(od->au);
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g_set_error(error, osx_output_quark(), status,
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"unable to start audio output: %s",
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GetMacOSStatusCommentString(status));
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return false;
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}
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return true;
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}
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static size_t
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osx_output_play(struct audio_output *ao, const void *chunk, size_t size,
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G_GNUC_UNUSED GError **error)
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{
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OSXOutput *od = (OSXOutput *)ao;
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const ScopeLock protect(od->mutex);
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void *dest;
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size_t max_length;
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while (true) {
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dest = fifo_buffer_write(od->buffer, &max_length);
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if (dest != NULL)
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break;
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/* wait for some free space in the buffer */
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od->condition.wait(od->mutex);
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}
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if (size > max_length)
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size = max_length;
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memcpy(dest, chunk, size);
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fifo_buffer_append(od->buffer, size);
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return size;
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}
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const struct audio_output_plugin osx_output_plugin = {
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"osx",
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osx_output_test_default_device,
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osx_output_init,
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osx_output_finish,
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osx_output_enable,
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osx_output_disable,
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osx_output_open,
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osx_output_close,
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nullptr,
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nullptr,
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osx_output_play,
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nullptr,
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osx_output_cancel,
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nullptr,
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nullptr,
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};
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Block a user