mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-08 18:39:54 +00:00
127 lines
3.6 KiB
C
127 lines
3.6 KiB
C
/*
|
|
* GStreamer
|
|
* Copyright (C) 2012 Fluendo S.A. <support@fluendo.com>
|
|
* Authors: Andoni Morales Alastruey <amorales@fluendo.com>
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
#import <AudioUnit/AUComponent.h>
|
|
|
|
static gboolean
|
|
gst_core_audio_open_impl (GstCoreAudio * core_audio)
|
|
{
|
|
return gst_core_audio_open_device (core_audio, kAudioUnitSubType_RemoteIO,
|
|
"RemoteIO");
|
|
}
|
|
|
|
static gboolean
|
|
gst_core_audio_start_processing_impl (GstCoreAudio * core_audio)
|
|
{
|
|
return gst_core_audio_io_proc_start (core_audio);
|
|
}
|
|
|
|
static gboolean
|
|
gst_core_audio_pause_processing_impl (GstCoreAudio * core_audio)
|
|
{
|
|
GST_DEBUG_OBJECT (core_audio,
|
|
"osx ring buffer pause ioproc: %p device_id %lu",
|
|
core_audio->element->io_proc, (gulong) core_audio->device_id);
|
|
|
|
if (core_audio->io_proc_active) {
|
|
/* CoreAudio isn't threadsafe enough to do this here;
|
|
* we must deactivate the render callback elsewhere. See:
|
|
* http://lists.apple.com/archives/Coreaudio-api/2006/Mar/msg00010.html
|
|
*/
|
|
core_audio->io_proc_needs_deactivation = TRUE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_core_audio_stop_processing_impl (GstCoreAudio * core_audio)
|
|
{
|
|
gst_core_audio_io_proc_stop (core_audio);
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_core_audio_get_samples_and_latency_impl (GstCoreAudio * core_audio,
|
|
gdouble rate, guint * samples, gdouble * latency)
|
|
{
|
|
OSStatus status;
|
|
UInt32 size;
|
|
|
|
status = AudioUnitGetProperty (core_audio->audiounit, kAudioUnitProperty_Latency, kAudioUnitScope_Global, 0, /* N/A for global */
|
|
latency, &size);
|
|
|
|
if (status) {
|
|
GST_WARNING_OBJECT (core_audio, "Failed to get latency: %"
|
|
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (status));
|
|
*samples = 0;
|
|
return FALSE;
|
|
}
|
|
|
|
*samples = *latency * rate;
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_core_audio_initialize_impl (GstCoreAudio * core_audio,
|
|
AudioStreamBasicDescription format, GstCaps * caps,
|
|
gboolean is_passthrough, guint32 * frame_size)
|
|
{
|
|
core_audio->is_passthrough = is_passthrough;
|
|
core_audio->stream_idx = 0;
|
|
if (!gst_core_audio_set_format (core_audio, format))
|
|
return FALSE;
|
|
|
|
/* FIXME: Use kAudioSessionProperty_CurrentHardwareSampleRate and
|
|
* kAudioSessionProperty_CurrentHardwareIOBufferDuration with property
|
|
* listeners to detect changes in screen locks.
|
|
* For now use the maximum value */
|
|
*frame_size = 4196;
|
|
|
|
GST_DEBUG_OBJECT (core_audio, "osxbuf ring buffer acquired");
|
|
return TRUE;
|
|
}
|
|
|
|
AudioChannelLayout *
|
|
gst_core_audio_audio_device_get_channel_layout (AudioDeviceID device_id)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static gboolean
|
|
gst_core_audio_select_device_impl (AudioDeviceID * device_id)
|
|
{
|
|
/* No device selection in iOS */
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_core_audio_select_source_device_impl (AudioDeviceID * device_id)
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_core_audio_audio_device_is_spdif_avail_impl (AudioDeviceID device_id)
|
|
{
|
|
/* No SPDIF in iOS */
|
|
return FALSE;
|
|
}
|