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121 lines
3.4 KiB
C
121 lines
3.4 KiB
C
/*
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* GStreamer
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* Copyright (C) 2012 Fluendo S.A. <support@fluendo.com>
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* Authors: Andoni Morales Alastruey <amorales@fluendo.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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*/
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#import <AudioUnit/AUComponent.h>
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static gboolean
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gst_core_audio_open_impl (GstCoreAudio * core_audio)
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{
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return gst_core_audio_open_device (core_audio, kAudioUnitSubType_RemoteIO,
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"RemoteIO");
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}
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static gboolean
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gst_core_audio_start_processing_impl (GstCoreAudio * core_audio)
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{
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return gst_core_audio_io_proc_start (core_audio);
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}
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static gboolean
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gst_core_audio_pause_processing_impl (GstCoreAudio * core_audio)
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{
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GST_DEBUG_OBJECT (core_audio,
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"osx ring buffer pause ioproc: %p device_id %lu",
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core_audio->element->io_proc, (gulong) core_audio->device_id);
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if (core_audio->io_proc_active) {
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/* CoreAudio isn't threadsafe enough to do this here;
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* we must deactivate the render callback elsewhere. See:
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* http://lists.apple.com/archives/Coreaudio-api/2006/Mar/msg00010.html
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*/
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core_audio->io_proc_needs_deactivation = TRUE;
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}
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return TRUE;
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}
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static gboolean
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gst_core_audio_stop_processing_impl (GstCoreAudio * core_audio)
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{
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gst_core_audio_io_proc_stop (core_audio);
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return TRUE;
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}
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static gboolean
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gst_core_audio_get_samples_and_latency_impl (GstCoreAudio * core_audio,
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gdouble rate, guint * samples, gdouble * latency)
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{
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OSStatus status;
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UInt32 size;
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status = AudioUnitGetProperty (core_audio->audiounit, kAudioUnitProperty_Latency, kAudioUnitScope_Global, 0, /* N/A for global */
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latency, &size);
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if (status) {
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GST_WARNING_OBJECT (core_audio, "Failed to get latency: %d", (int) status);
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*samples = 0;
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return FALSE;
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}
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*samples = *latency * rate;
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return TRUE;
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}
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static gboolean
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gst_core_audio_initialize_impl (GstCoreAudio * core_audio,
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AudioStreamBasicDescription format, GstCaps * caps,
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gboolean is_passthrough, guint32 * frame_size)
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{
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core_audio->is_passthrough = is_passthrough;
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core_audio->stream_idx = 0;
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if (!gst_core_audio_set_format (core_audio, format))
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return FALSE;
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/* FIXME: Use kAudioSessionProperty_CurrentHardwareSampleRate and
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* kAudioSessionProperty_CurrentHardwareIOBufferDuration with property
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* listeners to detect changes in screen locks.
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* For now use the maximum value */
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*frame_size = 4196;
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GST_DEBUG_OBJECT (core_audio, "osxbuf ring buffer acquired");
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return TRUE;
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}
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AudioChannelLayout *
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gst_core_audio_audio_device_get_channel_layout (AudioDeviceID device_id,
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gboolean output)
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{
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return NULL;
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}
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static gboolean
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gst_core_audio_select_device_impl (GstCoreAudio * core_audio)
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{
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/* No device selection in iOS */
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return TRUE;
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}
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static gboolean
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gst_core_audio_audio_device_is_spdif_avail_impl (AudioDeviceID device_id)
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{
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/* No SPDIF in iOS */
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return FALSE;
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}
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