gstreamer/subprojects/gst-plugins-good/sys/osxaudio/gstosxaudiodeviceprovider.c

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/* GStreamer
* Copyright (C) 2016 Hyunjun Ko <zzoon@igalia.com>
*
* gstosxaudiodeviceprovider.c: OSX audio device probing and monitoring
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/audio/audio.h>
#include "gstosxaudiosrc.h"
#include "gstosxaudiosink.h"
#include "gstosxaudiodeviceprovider.h"
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_OSX_AUDIO_SRC_CAPS)
);
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_OSX_AUDIO_SINK_CAPS)
);
static GstOsxAudioDevice *gst_osx_audio_device_new (AudioDeviceID device_id,
const gchar * device_name, GstOsxAudioDeviceType type,
GstCoreAudio * core_audio);
G_DEFINE_TYPE (GstOsxAudioDeviceProvider, gst_osx_audio_device_provider,
GST_TYPE_DEVICE_PROVIDER);
static GList *gst_osx_audio_device_provider_probe (GstDeviceProvider *
provider);
static void
gst_osx_audio_device_provider_class_init (GstOsxAudioDeviceProviderClass *
klass)
{
GstDeviceProviderClass *dm_class = GST_DEVICE_PROVIDER_CLASS (klass);
dm_class->probe = gst_osx_audio_device_provider_probe;
gst_device_provider_class_set_static_metadata (dm_class,
"OSX Audio Device Provider", "Source/Sink/Audio",
"List and monitor OSX audio source and sink devices",
"Hyunjun Ko <zzoon@igalia.com>");
}
static void
gst_osx_audio_device_provider_init (GstOsxAudioDeviceProvider * provider)
{
}
static GstOsxAudioDevice *
gst_osx_audio_device_provider_probe_device (GstOsxAudioDeviceProvider *
provider, AudioDeviceID device_id, const gchar * device_name,
GstOsxAudioDeviceType type)
{
GstOsxAudioDevice *device = NULL;
GstCoreAudio *core_audio;
core_audio = gst_core_audio_new (NULL);
core_audio->is_src = type == GST_OSX_AUDIO_DEVICE_TYPE_SOURCE ? TRUE : FALSE;
core_audio->device_id = device_id;
if (!gst_core_audio_open (core_audio)) {
GST_ERROR ("CoreAudio device could not be opened");
goto done;
}
device = gst_osx_audio_device_new (device_id, device_name, type, core_audio);
gst_core_audio_close (core_audio);
done:
g_object_unref (core_audio);
return device;
}
static inline gchar *
_audio_device_get_name (AudioDeviceID device_id, gboolean output)
{
OSStatus status = noErr;
UInt32 propertySize = 0;
gchar *device_name = NULL;
AudioObjectPropertyScope prop_scope;
AudioObjectPropertyAddress deviceNameAddress = {
kAudioDevicePropertyDeviceName,
kAudioDevicePropertyScopeOutput,
kAudioObjectPropertyElementMaster
};
prop_scope = output ? kAudioDevicePropertyScopeOutput :
kAudioDevicePropertyScopeInput;
deviceNameAddress.mScope = prop_scope;
/* Get the length of the device name */
status = AudioObjectGetPropertyDataSize (device_id,
&deviceNameAddress, 0, NULL, &propertySize);
if (status != noErr) {
goto beach;
}
/* Get the name of the device */
device_name = (gchar *) g_malloc (propertySize);
status = AudioObjectGetPropertyData (device_id,
&deviceNameAddress, 0, NULL, &propertySize, device_name);
if (status != noErr) {
g_free (device_name);
device_name = NULL;
}
beach:
return device_name;
}
static inline gboolean
_audio_device_has_output (AudioDeviceID device_id)
{
OSStatus status = noErr;
UInt32 propertySize;
AudioObjectPropertyAddress streamsAddress = {
kAudioDevicePropertyStreams,
kAudioDevicePropertyScopeOutput,
kAudioObjectPropertyElementMaster
};
status = AudioObjectGetPropertyDataSize (device_id,
&streamsAddress, 0, NULL, &propertySize);
if (status != noErr) {
return FALSE;
}
if (propertySize == 0) {
return FALSE;
}
return TRUE;
}
static inline AudioDeviceID *
_audio_system_get_devices (gint * ndevices)
{
OSStatus status = noErr;
UInt32 propertySize = 0;
AudioDeviceID *devices = NULL;
AudioObjectPropertyAddress audioDevicesAddress = {
kAudioHardwarePropertyDevices,
kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyElementMaster
};
status = AudioObjectGetPropertyDataSize (kAudioObjectSystemObject,
&audioDevicesAddress, 0, NULL, &propertySize);
if (status != noErr) {
GST_WARNING ("failed getting number of devices: %d", (int) status);
return NULL;
}
*ndevices = propertySize / sizeof (AudioDeviceID);
devices = (AudioDeviceID *) g_malloc (propertySize);
if (devices) {
status = AudioObjectGetPropertyData (kAudioObjectSystemObject,
&audioDevicesAddress, 0, NULL, &propertySize, devices);
if (status != noErr) {
GST_WARNING ("failed getting the list of devices: %d", (int) status);
g_free (devices);
*ndevices = 0;
return NULL;
}
}
return devices;
}
static GList *
gst_osx_audio_device_provider_probe (GstDeviceProvider * provider)
{
GstOsxAudioDeviceProvider *self = GST_OSX_AUDIO_DEVICE_PROVIDER (provider);
GList *devices = NULL;
GstOsxAudioDevice *device = NULL;
AudioDeviceID *osx_devices = NULL;
gint i, ndevices = 0;
osx_devices = _audio_system_get_devices (&ndevices);
if (ndevices < 1) {
GST_WARNING ("no audio output devices found");
goto done;
}
GST_INFO ("found %d audio device(s)", ndevices);
for (i = 0; i < ndevices; i++) {
gchar *device_name;
GstOsxAudioDeviceType type = GST_OSX_AUDIO_DEVICE_TYPE_INVALID;
if ((device_name = _audio_device_get_name (osx_devices[i], FALSE))) {
if (!_audio_device_has_output (osx_devices[i])) {
GST_DEBUG ("Input Device ID: %u Name: %s",
(unsigned) osx_devices[i], device_name);
type = GST_OSX_AUDIO_DEVICE_TYPE_SOURCE;
} else {
GST_DEBUG ("Output Device ID: %u Name: %s",
(unsigned) osx_devices[i], device_name);
type = GST_OSX_AUDIO_DEVICE_TYPE_SINK;
}
device =
gst_osx_audio_device_provider_probe_device (self, osx_devices[i],
device_name, type);
if (device) {
gst_object_ref_sink (device);
devices = g_list_prepend (devices, device);
}
g_free (device_name);
}
}
done:
g_free (osx_devices);
return devices;
}
enum
{
PROP_DEVICE_ID = 1,
};
G_DEFINE_TYPE (GstOsxAudioDevice, gst_osx_audio_device, GST_TYPE_DEVICE);
static void gst_osx_audio_device_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_osx_audio_device_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static GstElement *gst_osx_audio_device_create_element (GstDevice * device,
const gchar * name);
static void
gst_osx_audio_device_class_init (GstOsxAudioDeviceClass * klass)
{
GstDeviceClass *dev_class = GST_DEVICE_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
dev_class->create_element = gst_osx_audio_device_create_element;
object_class->get_property = gst_osx_audio_device_get_property;
object_class->set_property = gst_osx_audio_device_set_property;
g_object_class_install_property (object_class, PROP_DEVICE_ID,
g_param_spec_int ("device-id", "Device ID", "Device ID of input device",
0, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
gst_osx_audio_device_init (GstOsxAudioDevice * device)
{
}
static GstElement *
gst_osx_audio_device_create_element (GstDevice * device, const gchar * name)
{
GstOsxAudioDevice *osxdev = GST_OSX_AUDIO_DEVICE (device);
GstElement *elem;
elem = gst_element_factory_make (osxdev->element, name);
g_object_set (elem, "device", osxdev->device_id, NULL);
return elem;
}
static GstOsxAudioDevice *
gst_osx_audio_device_new (AudioDeviceID device_id, const gchar * device_name,
GstOsxAudioDeviceType type, GstCoreAudio * core_audio)
{
GstOsxAudioDevice *gstdev;
const gchar *element_name = NULL;
const gchar *klass = NULL;
GstCaps *template_caps, *caps;
g_return_val_if_fail (device_id > 0, NULL);
g_return_val_if_fail (device_name, NULL);
switch (type) {
case GST_OSX_AUDIO_DEVICE_TYPE_SOURCE:
element_name = "osxaudiosrc";
klass = "Audio/Source";
template_caps = gst_static_pad_template_get_caps (&src_factory);
caps = gst_core_audio_probe_caps (core_audio, template_caps);
gst_caps_unref (template_caps);
break;
case GST_OSX_AUDIO_DEVICE_TYPE_SINK:
element_name = "osxaudiosink";
klass = "Audio/Sink";
template_caps = gst_static_pad_template_get_caps (&sink_factory);
caps = gst_core_audio_probe_caps (core_audio, template_caps);
gst_caps_unref (template_caps);
break;
default:
g_assert_not_reached ();
break;
}
gstdev = g_object_new (GST_TYPE_OSX_AUDIO_DEVICE, "device-id",
device_id, "display-name", device_name, "caps", caps, "device-class",
klass, NULL);
gstdev->element = element_name;
return gstdev;
}
static void
gst_osx_audio_device_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstOsxAudioDevice *device;
device = GST_OSX_AUDIO_DEVICE_CAST (object);
switch (prop_id) {
case PROP_DEVICE_ID:
g_value_set_int (value, device->device_id);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_osx_audio_device_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstOsxAudioDevice *device;
device = GST_OSX_AUDIO_DEVICE_CAST (object);
switch (prop_id) {
case PROP_DEVICE_ID:
device->device_id = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}