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https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-03 09:01:50 -05:00
CoreAudio: add device detection module
This adds a new module for CoreAudio device detection. It registers a callback to detect hotplugged devices and creates/destroys modules named 'module-coreaudio-device'. Devices are identified via a system-wide unique AudioDeviceID.
This commit is contained in:
Daniel Mack
parent
28a73ad120
commit
a23f5cf33d
2 changed files with 243 additions and 0 deletions
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@ -1066,6 +1066,11 @@ modlibexec_LTLIBRARIES += \
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module-oss.la
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endif
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if HAVE_COREAUDIO
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modlibexec_LTLIBRARIES += \
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module-coreaudio-detect.la
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endif
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pulselibexec_PROGRAMS =
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if HAVE_ALSA
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@ -1238,6 +1243,7 @@ SYMDEF_FILES = \
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modules/alsa/module-alsa-sink-symdef.h \
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modules/alsa/module-alsa-source-symdef.h \
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modules/alsa/module-alsa-card-symdef.h \
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modules/coreaudio/module-coreaudio-detect-symdef.h \
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modules/module-solaris-symdef.h \
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modules/module-waveout-symdef.h \
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modules/module-detect-symdef.h \
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@ -1469,6 +1475,14 @@ module_oss_la_SOURCES = modules/oss/module-oss.c
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module_oss_la_LDFLAGS = $(MODULE_LDFLAGS)
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module_oss_la_LIBADD = $(AM_LIBADD) liboss-util.la libpulsecore-@PA_MAJORMINORMICRO@.la libpulsecommon-@PA_MAJORMINORMICRO@.la libpulse.la
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# COREAUDIO
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module_coreaudio_detect_la_SOURCES = modules/coreaudio/module-coreaudio-detect.c
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module_coreaudio_detect_la_LDFLAGS = $(MODULE_LDFLAGS) \
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-Wl,-framework -Wl,Cocoa -framework CoreAudio \
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-Wl,-framework -Wl,AudioUnit -framework AudioUnit
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module_coreaudio_detect_la_LIBADD = $(AM_LIBADD) libpulsecore-@PA_MAJORMINORMICRO@.la libpulsecommon-@PA_MAJORMINORMICRO@.la libpulse.la
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# ALSA
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libalsa_util_la_SOURCES = modules/alsa/alsa-util.c modules/alsa/alsa-util.h modules/alsa/alsa-mixer.c modules/alsa/alsa-mixer.h modules/alsa/alsa-sink.c modules/alsa/alsa-sink.h modules/alsa/alsa-source.c modules/alsa/alsa-source.h modules/reserve-wrap.c modules/reserve-wrap.h
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229
src/modules/coreaudio/module-coreaudio-detect.c
Normal file
229
src/modules/coreaudio/module-coreaudio-detect.c
Normal file
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@ -0,0 +1,229 @@
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/***
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This file is part of PulseAudio.
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Copyright 2009 Daniel Mack <daniel@caiaq.de>
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <pulse/xmalloc.h>
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#include <pulsecore/module.h>
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#include <pulsecore/core-util.h>
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#include <pulsecore/modargs.h>
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#include <pulsecore/log.h>
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#include <pulsecore/llist.h>
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#include <CoreAudio/CoreAudio.h>
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#include "module-coreaudio-detect-symdef.h"
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#define DEVICE_MODULE_NAME "module-coreaudio-device"
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PA_MODULE_AUTHOR("Daniel Mack");
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PA_MODULE_DESCRIPTION("CoreAudio device detection");
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PA_MODULE_VERSION(PACKAGE_VERSION);
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PA_MODULE_LOAD_ONCE(TRUE);
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PA_MODULE_USAGE("");
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typedef struct ca_device ca_device;
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struct ca_device {
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AudioDeviceID id;
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unsigned int module_index;
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PA_LLIST_FIELDS(ca_device);
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};
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struct userdata {
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int detect_fds[2];
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pa_io_event *detect_io;
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PA_LLIST_HEAD(ca_device, devices);
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};
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static int ca_device_added(struct pa_module *m, AudioDeviceID id) {
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pa_module *mod;
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struct userdata *u = m->userdata;
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struct ca_device *dev;
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char *args;
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pa_assert(u);
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args = pa_sprintf_malloc("device_id=%d", (int) id);
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pa_log_debug("Loading %s with arguments '%s'", DEVICE_MODULE_NAME, args);
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mod = pa_module_load(m->core, DEVICE_MODULE_NAME, args);
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pa_xfree(args);
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if (!mod) {
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pa_log_info("Failed to load module %s with arguments '%s'", DEVICE_MODULE_NAME, args);
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return -1;
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}
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dev = pa_xnew0(ca_device, 1);
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dev->module_index = mod->index;
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dev->id = id;
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PA_LLIST_INIT(ca_device, dev);
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PA_LLIST_PREPEND(ca_device, u->devices, dev);
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return 0;
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}
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static int ca_update_device_list(struct pa_module *m) {
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OSStatus err;
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UInt32 i, size, num_devices;
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Boolean writable;
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AudioDeviceID *device_id;
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struct ca_device *dev;
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struct userdata *u = m->userdata;
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pa_assert(u);
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/* get the number of currently available audio devices */
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err = AudioHardwareGetPropertyInfo(kAudioHardwarePropertyDevices, &size, &writable);
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if (err) {
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pa_log("Unable to get info for kAudioHardwarePropertyDevices.");
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return -1;
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}
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num_devices = size / sizeof(AudioDeviceID);
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device_id = pa_xnew(AudioDeviceID, num_devices);
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err = AudioHardwareGetProperty(kAudioHardwarePropertyDevices, &size, device_id);
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if (err) {
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pa_log("Unable to get kAudioHardwarePropertyDevices.");
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pa_xfree(device_id);
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return -1;
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}
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/* scan for devices which are reported but not in our cached list */
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for (i = 0; i < num_devices; i++) {
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bool found = FALSE;
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PA_LLIST_FOREACH(dev, u->devices)
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if (dev->id == device_id[i]) {
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found = TRUE;
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break;
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}
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if (!found)
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ca_device_added(m, device_id[i]);
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}
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/* scan for devices which are in our cached list but are not reported */
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scan_removed:
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PA_LLIST_FOREACH(dev, u->devices) {
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bool found = FALSE;
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for (i = 0; i < num_devices; i++)
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if (dev->id == device_id[i]) {
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found = TRUE;
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break;
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}
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if (!found) {
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pa_log_debug("device id %d has been removed (module index %d) %p", (unsigned int) dev->id, dev->module_index, dev);
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pa_module_unload_request_by_index(m->core, dev->module_index, TRUE);
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PA_LLIST_REMOVE(ca_device, u->devices, dev);
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pa_xfree(dev);
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/* the current list item pointer is not valid anymore, so start over. */
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goto scan_removed;
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}
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}
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pa_xfree(device_id);
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return 0;
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}
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static OSStatus property_listener_proc(AudioHardwarePropertyID property, void *data) {
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struct userdata *u = data;
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char dummy = 1;
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pa_assert(u);
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/* dispatch module load/unload operations in main thread */
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if (property == kAudioHardwarePropertyDevices)
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write(u->detect_fds[1], &dummy, 1);
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return 0;
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}
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static void detect_handle(pa_mainloop_api *a, pa_io_event *e, int fd, pa_io_event_flags_t events, void *userdata) {
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pa_module *m = userdata;
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char dummy;
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pa_assert(m);
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read(fd, &dummy, 1);
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ca_update_device_list(m);
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}
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int pa__init(pa_module *m) {
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struct userdata *u = pa_xnew0(struct userdata, 1);
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m->userdata = u;
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if (AudioHardwareAddPropertyListener(kAudioHardwarePropertyDevices, property_listener_proc, u)) {
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pa_log("AudioHardwareAddPropertyListener() failed.");
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goto fail;
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}
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if (ca_update_device_list(m))
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goto fail;
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pa_assert_se(pipe(u->detect_fds) == 0);
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pa_assert_se(u->detect_io = m->core->mainloop->io_new(m->core->mainloop, u->detect_fds[0], PA_IO_EVENT_INPUT, detect_handle, m));
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return 0;
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fail:
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pa_xfree(u);
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return -1;
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}
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void pa__done(pa_module *m) {
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struct userdata *u = m->userdata;
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struct ca_device *dev = u->devices;
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pa_assert(u);
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AudioHardwareRemovePropertyListener(kAudioHardwarePropertyDevices, property_listener_proc);
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while (dev) {
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struct ca_device *next = dev->next;
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pa_module_unload_request_by_index(m->core, dev->module_index, TRUE);
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pa_xfree(dev);
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dev = next;
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}
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if (u->detect_fds[0] >= 0)
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close(u->detect_fds[0]);
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if (u->detect_fds[1] >= 0)
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close(u->detect_fds[1]);
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if (u->detect_io)
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m->core->mainloop->io_free(u->detect_io);
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pa_xfree(u);
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}
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