gstreamer/sys/osxaudio/gstosxringbuffer.c

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/*
* GStreamer
* Copyright (C) 2006 Zaheer Abbas Merali <zaheerabbas at merali dot org>
* Copyright (C) 2008 Pioneers of the Inevitable <songbird@songbirdnest.com>
* Copyright (C) 2012 Fluendo S.A. <support@fluendo.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Alternatively, the contents of this file may be used under the
* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
* which case the following provisions apply instead of the ones
* mentioned above:
*
* 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.
*/
#include <CoreAudio/CoreAudio.h>
#include <CoreServices/CoreServices.h>
#include <gst/gst.h>
#include <gst/audio/multichannel.h>
#include "gstosxringbuffer.h"
#include "gstosxaudiosink.h"
#include "gstosxaudiosrc.h"
#include <unistd.h> /* for getpid() */
GST_DEBUG_CATEGORY_STATIC (osx_audio_debug);
#define GST_CAT_DEFAULT osx_audio_debug
#include "gstosxcoreaudio.h"
static void gst_osx_ring_buffer_dispose (GObject * object);
static void gst_osx_ring_buffer_finalize (GObject * object);
static gboolean gst_osx_ring_buffer_open_device (GstRingBuffer * buf);
static gboolean gst_osx_ring_buffer_close_device (GstRingBuffer * buf);
static gboolean gst_osx_ring_buffer_acquire (GstRingBuffer * buf,
GstRingBufferSpec * spec);
static gboolean gst_osx_ring_buffer_release (GstRingBuffer * buf);
static gboolean gst_osx_ring_buffer_start (GstRingBuffer * buf);
static gboolean gst_osx_ring_buffer_pause (GstRingBuffer * buf);
static gboolean gst_osx_ring_buffer_stop (GstRingBuffer * buf);
static guint gst_osx_ring_buffer_delay (GstRingBuffer * buf);
static GstRingBufferClass *ring_parent_class = NULL;
static void gst_osx_ring_buffer_remove_render_callback (GstOsxRingBuffer *
osxbuf);
static void
gst_osx_ring_buffer_do_init (GType type)
{
GST_DEBUG_CATEGORY_INIT (osx_audio_debug, "osxaudio", 0,
"OSX Audio Elements");
}
GST_BOILERPLATE_FULL (GstOsxRingBuffer, gst_osx_ring_buffer,
GstRingBuffer, GST_TYPE_RING_BUFFER, gst_osx_ring_buffer_do_init);
static void
gst_osx_ring_buffer_base_init (gpointer g_class)
{
/* Nothing to do right now */
}
static void
gst_osx_ring_buffer_class_init (GstOsxRingBufferClass * klass)
{
GObjectClass *gobject_class;
GstObjectClass *gstobject_class;
GstRingBufferClass *gstringbuffer_class;
gobject_class = (GObjectClass *) klass;
gstobject_class = (GstObjectClass *) klass;
gstringbuffer_class = (GstRingBufferClass *) klass;
ring_parent_class = g_type_class_peek_parent (klass);
gobject_class->dispose = gst_osx_ring_buffer_dispose;
gobject_class->finalize = gst_osx_ring_buffer_finalize;
gstringbuffer_class->open_device =
GST_DEBUG_FUNCPTR (gst_osx_ring_buffer_open_device);
gstringbuffer_class->close_device =
GST_DEBUG_FUNCPTR (gst_osx_ring_buffer_close_device);
gstringbuffer_class->acquire =
GST_DEBUG_FUNCPTR (gst_osx_ring_buffer_acquire);
gstringbuffer_class->release =
GST_DEBUG_FUNCPTR (gst_osx_ring_buffer_release);
gstringbuffer_class->start = GST_DEBUG_FUNCPTR (gst_osx_ring_buffer_start);
gstringbuffer_class->pause = GST_DEBUG_FUNCPTR (gst_osx_ring_buffer_pause);
gstringbuffer_class->resume = GST_DEBUG_FUNCPTR (gst_osx_ring_buffer_start);
gstringbuffer_class->stop = GST_DEBUG_FUNCPTR (gst_osx_ring_buffer_stop);
gstringbuffer_class->delay = GST_DEBUG_FUNCPTR (gst_osx_ring_buffer_delay);
GST_DEBUG ("osx ring buffer class init");
}
static void
gst_osx_ring_buffer_init (GstOsxRingBuffer * ringbuffer,
GstOsxRingBufferClass * g_class)
{
/* Nothing to do right now */
ringbuffer->is_passthrough = FALSE;
ringbuffer->hog_pid = -1;
ringbuffer->disabled_mixing = FALSE;
}
static void
gst_osx_ring_buffer_dispose (GObject * object)
{
G_OBJECT_CLASS (ring_parent_class)->dispose (object);
}
static void
gst_osx_ring_buffer_finalize (GObject * object)
{
G_OBJECT_CLASS (ring_parent_class)->finalize (object);
}
static AudioUnit
gst_osx_ring_buffer_create_audio_unit (GstOsxRingBuffer * osxbuf,
gboolean input, AudioDeviceID device_id)
{
ComponentDescription desc;
Component comp;
OSStatus status;
AudioUnit unit;
UInt32 enableIO;
AudioStreamBasicDescription asbd_in;
UInt32 propertySize;
/* Create a HALOutput AudioUnit.
* This is the lowest-level output API that is actually sensibly
* usable (the lower level ones require that you do
* channel-remapping yourself, and the CoreAudio channel mapping
* is sufficiently complex that doing so would be very difficult)
*
* Note that for input we request an output unit even though
* we will do input with it.
* http://developer.apple.com/technotes/tn2002/tn2091.html
*/
desc.componentType = kAudioUnitType_Output;
desc.componentSubType = kAudioUnitSubType_HALOutput;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
desc.componentFlags = 0;
desc.componentFlagsMask = 0;
comp = FindNextComponent (NULL, &desc);
if (comp == NULL) {
GST_WARNING_OBJECT (osxbuf, "Couldn't find HALOutput component");
return NULL;
}
status = OpenAComponent (comp, &unit);
if (status) {
GST_ERROR_OBJECT (osxbuf, "Couldn't open HALOutput component %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (status));
return NULL;
}
if (input) {
/* enable input */
enableIO = 1;
status = AudioUnitSetProperty (unit, kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Input, 1, /* 1 = input element */
&enableIO, sizeof (enableIO));
if (status) {
CloseComponent (unit);
GST_WARNING_OBJECT (osxbuf, "Failed to enable input: %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (status));
return NULL;
}
/* disable output */
enableIO = 0;
status = AudioUnitSetProperty (unit, kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Output, 0, /* 0 = output element */
&enableIO, sizeof (enableIO));
if (status) {
CloseComponent (unit);
GST_WARNING_OBJECT (osxbuf, "Failed to disable output: %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (status));
return NULL;
}
}
GST_DEBUG_OBJECT (osxbuf, "Created HALOutput AudioUnit: %p", unit);
if (input) {
GstOsxAudioSrc *src = GST_OSX_AUDIO_SRC (GST_OBJECT_PARENT (osxbuf));
propertySize = sizeof (asbd_in);
status = AudioUnitGetProperty (unit,
kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Input, 1, &asbd_in, &propertySize);
if (status) {
CloseComponent (unit);
GST_WARNING_OBJECT (osxbuf,
"Unable to obtain device properties: %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (status));
return NULL;
}
src->deviceChannels = asbd_in.mChannelsPerFrame;
} else {
GstOsxAudioSink *sink = GST_OSX_AUDIO_SINK (GST_OBJECT_PARENT (osxbuf));
/* needed for the sink's volume control */
sink->audiounit = unit;
}
return unit;
}
static gboolean
gst_osx_ring_buffer_open_device (GstRingBuffer * buf)
{
GstOsxRingBuffer *osxbuf;
osxbuf = GST_OSX_RING_BUFFER (buf);
/* The following is needed to instruct HAL to create their own
* thread to handle the notifications. */
_audio_system_set_runloop (NULL);
osxbuf->audiounit = gst_osx_ring_buffer_create_audio_unit (osxbuf,
osxbuf->is_src, osxbuf->device_id);
if (!osxbuf->audiounit) {
return FALSE;
}
return TRUE;
}
static gboolean
gst_osx_ring_buffer_close_device (GstRingBuffer * buf)
{
GstOsxRingBuffer *osxbuf;
osxbuf = GST_OSX_RING_BUFFER (buf);
CloseComponent (osxbuf->audiounit);
osxbuf->audiounit = NULL;
return TRUE;
}
static AudioChannelLabel
gst_audio_channel_position_to_coreaudio_channel_label (GstAudioChannelPosition
position, int channel)
{
switch (position) {
case GST_AUDIO_CHANNEL_POSITION_NONE:
return kAudioChannelLabel_Discrete_0 | channel;
case GST_AUDIO_CHANNEL_POSITION_FRONT_MONO:
return kAudioChannelLabel_Mono;
case GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT:
return kAudioChannelLabel_Left;
case GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT:
return kAudioChannelLabel_Right;
case GST_AUDIO_CHANNEL_POSITION_REAR_CENTER:
return kAudioChannelLabel_CenterSurround;
case GST_AUDIO_CHANNEL_POSITION_REAR_LEFT:
return kAudioChannelLabel_LeftSurround;
case GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT:
return kAudioChannelLabel_RightSurround;
case GST_AUDIO_CHANNEL_POSITION_LFE:
return kAudioChannelLabel_LFEScreen;
case GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER:
return kAudioChannelLabel_Center;
case GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER:
return kAudioChannelLabel_Center; // ???
case GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER:
return kAudioChannelLabel_Center; // ???
case GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT:
return kAudioChannelLabel_LeftSurroundDirect;
case GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT:
return kAudioChannelLabel_RightSurroundDirect;
default:
return kAudioChannelLabel_Unknown;
}
}
static AudioBufferList *
buffer_list_alloc (int channels, int size)
{
AudioBufferList *list;
int total_size;
int n;
total_size = sizeof (AudioBufferList) + 1 * sizeof (AudioBuffer);
list = (AudioBufferList *) g_malloc (total_size);
list->mNumberBuffers = 1;
for (n = 0; n < (int) list->mNumberBuffers; ++n) {
list->mBuffers[n].mNumberChannels = channels;
list->mBuffers[n].mDataByteSize = size;
list->mBuffers[n].mData = g_malloc (size);
}
return list;
}
static void
buffer_list_free (AudioBufferList * list)
{
int n;
for (n = 0; n < (int) list->mNumberBuffers; ++n) {
if (list->mBuffers[n].mData)
g_free (list->mBuffers[n].mData);
}
g_free (list);
}
typedef struct
{
GMutex *lock;
GCond *cond;
} PropertyMutex;
static OSStatus
_audio_stream_format_listener (AudioObjectID inObjectID,
UInt32 inNumberAddresses,
const AudioObjectPropertyAddress inAddresses[], void *inClientData)
{
OSStatus status = noErr;
guint i;
PropertyMutex *prop_mutex = inClientData;
for (i = 0; i < inNumberAddresses; i++) {
if (inAddresses[i].mSelector == kAudioStreamPropertyPhysicalFormat) {
g_mutex_lock (prop_mutex->lock);
g_cond_signal (prop_mutex->cond);
g_mutex_unlock (prop_mutex->lock);
break;
}
}
return (status);
}
static gboolean
_audio_stream_change_format (AudioStreamID stream_id,
AudioStreamBasicDescription format)
{
OSStatus status = noErr;
gint i;
gboolean ret = FALSE;
AudioStreamBasicDescription cformat;
PropertyMutex prop_mutex;
AudioObjectPropertyAddress formatAddress = {
kAudioStreamPropertyPhysicalFormat,
kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyElementMaster
};
GST_DEBUG ("setting stream format: " CORE_AUDIO_FORMAT,
CORE_AUDIO_FORMAT_ARGS (format));
/* Condition because SetProperty is asynchronous */
prop_mutex.lock = g_mutex_new ();
prop_mutex.cond = g_cond_new ();
g_mutex_lock (prop_mutex.lock);
/* Install the property listener to serialize the operations */
status = AudioObjectAddPropertyListener (stream_id, &formatAddress,
_audio_stream_format_listener, (void *) &prop_mutex);
if (status != noErr) {
GST_ERROR ("AudioObjectAddPropertyListener failed: %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (status));
goto done;
}
/* Change the format */
if (!_audio_stream_set_current_format (stream_id, format)) {
goto done;
}
/* The AudioObjectSetProperty is not only asynchronous
* it is also not atomic in its behaviour.
* Therefore we check 4 times before we really give up. */
for (i = 0; i < 4; i++) {
GTimeVal timeout;
g_get_current_time (&timeout);
g_time_val_add (&timeout, 250000);
if (!g_cond_timed_wait (prop_mutex.cond, prop_mutex.lock, &timeout)) {
GST_LOG ("timeout...");
}
if (_audio_stream_get_current_format (stream_id, &cformat)) {
GST_DEBUG ("current stream format: " CORE_AUDIO_FORMAT,
CORE_AUDIO_FORMAT_ARGS (cformat));
if (cformat.mSampleRate == format.mSampleRate &&
cformat.mFormatID == format.mFormatID &&
cformat.mFramesPerPacket == format.mFramesPerPacket) {
/* The right format is now active */
break;
}
}
}
if (cformat.mSampleRate != format.mSampleRate ||
cformat.mFormatID != format.mFormatID ||
cformat.mFramesPerPacket != format.mFramesPerPacket) {
goto done;
}
ret = TRUE;
done:
/* Removing the property listener */
status = AudioObjectRemovePropertyListener (stream_id,
&formatAddress, _audio_stream_format_listener, (void *) &prop_mutex);
if (status != noErr) {
GST_ERROR ("AudioObjectRemovePropertyListener failed: %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (status));
}
/* Destroy the lock and condition */
g_mutex_unlock (prop_mutex.lock);
g_mutex_free (prop_mutex.lock);
g_cond_free (prop_mutex.cond);
return ret;
}
static OSStatus
_audio_stream_hardware_changed_listener (AudioObjectID inObjectID,
UInt32 inNumberAddresses,
const AudioObjectPropertyAddress inAddresses[], void *inClientData)
{
OSStatus status = noErr;
guint i;
GstOsxRingBuffer *osxbuf = inClientData;
for (i = 0; i < inNumberAddresses; i++) {
if (inAddresses[i].mSelector == kAudioDevicePropertyDeviceHasChanged) {
if (!_audio_device_is_spdif_avail (osxbuf->device_id)) {
GstOsxAudioSink *sink = GST_OSX_AUDIO_SINK (GST_OBJECT_PARENT (osxbuf));
GST_ELEMENT_ERROR (sink, RESOURCE, FAILED,
("SPDIF output no longer available"),
("Audio device is reporting that SPDIF output isn't available"));
}
break;
}
}
return (status);
}
static gboolean
gst_osx_ring_buffer_monitorize_spdif (GstOsxRingBuffer * osxbuf)
{
OSStatus status = noErr;
gboolean ret = TRUE;
AudioObjectPropertyAddress propAddress = {
kAudioDevicePropertyDeviceHasChanged,
kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyElementMaster
};
/* Install the property listener */
status = AudioObjectAddPropertyListener (osxbuf->device_id,
&propAddress, _audio_stream_hardware_changed_listener, (void *) osxbuf);
if (status != noErr) {
GST_ERROR ("AudioObjectAddPropertyListener failed: %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (status));
ret = FALSE;
}
return ret;
}
static gboolean
gst_osx_ring_buffer_unmonitorize_spdif (GstOsxRingBuffer * osxbuf)
{
OSStatus status = noErr;
gboolean ret = TRUE;
AudioObjectPropertyAddress propAddress = {
kAudioDevicePropertyDeviceHasChanged,
kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyElementMaster
};
/* Remove the property listener */
status = AudioObjectRemovePropertyListener (osxbuf->device_id,
&propAddress, _audio_stream_hardware_changed_listener, (void *) osxbuf);
if (status != noErr) {
GST_ERROR ("AudioObjectRemovePropertyListener failed: %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (status));
ret = FALSE;
}
return ret;
}
static gboolean
gst_osx_ring_buffer_open_spdif (GstOsxRingBuffer * osxbuf)
{
gboolean res = FALSE;
pid_t hog_pid, own_pid = getpid ();
/* We need the device in exclusive and disable the mixing */
hog_pid = _audio_device_get_hog (osxbuf->device_id);
if (hog_pid != -1 && hog_pid != own_pid) {
GST_DEBUG_OBJECT (osxbuf,
"device is currently in use by another application");
goto done;
}
if (_audio_device_set_hog (osxbuf->device_id, own_pid)) {
osxbuf->hog_pid = own_pid;
}
if (_audio_device_set_mixing (osxbuf->device_id, FALSE)) {
GST_DEBUG_OBJECT (osxbuf, "disabled mixing on the device");
osxbuf->disabled_mixing = TRUE;
}
res = TRUE;
done:
return res;
}
static gboolean
gst_osx_ring_buffer_close_spdif (GstOsxRingBuffer * osxbuf)
{
pid_t hog_pid;
gst_osx_ring_buffer_unmonitorize_spdif (osxbuf);
if (osxbuf->revert_format) {
if (!_audio_stream_change_format (osxbuf->stream_id,
osxbuf->original_format)) {
GST_WARNING ("Format revert failed");
}
osxbuf->revert_format = FALSE;
}
if (osxbuf->disabled_mixing) {
_audio_device_set_mixing (osxbuf->device_id, TRUE);
osxbuf->disabled_mixing = FALSE;
}
if (osxbuf->hog_pid != -1) {
hog_pid = _audio_device_get_hog (osxbuf->device_id);
if (hog_pid == getpid ()) {
if (_audio_device_set_hog (osxbuf->device_id, -1)) {
osxbuf->hog_pid = -1;
}
}
}
return TRUE;
}
static OSStatus
gst_osx_ring_buffer_io_proc_spdif (AudioDeviceID inDevice,
const AudioTimeStamp * inNow,
const void *inInputData,
const AudioTimeStamp * inTimestamp,
AudioBufferList * bufferList,
const AudioTimeStamp * inOutputTime, GstOsxRingBuffer * osxbuf)
{
OSStatus status;
status = osxbuf->element->io_proc (osxbuf, NULL, inTimestamp, 0, 0,
bufferList);
return status;
}
static gboolean
gst_osx_ring_buffer_acquire_spdif (GstOsxRingBuffer * osxbuf,
AudioStreamBasicDescription format)
{
AudioStreamID *streams = NULL;
gint i, j, nstreams = 0;
gboolean ret = FALSE;
if (!gst_osx_ring_buffer_open_spdif (osxbuf))
goto done;
streams = _audio_device_get_streams (osxbuf->device_id, &nstreams);
for (i = 0; i < nstreams; i++) {
AudioStreamRangedDescription *formats = NULL;
gint nformats = 0;
formats = _audio_stream_get_formats (streams[i], &nformats);
if (formats) {
gboolean is_spdif = FALSE;
/* Check if one of the supported formats is a digital format */
for (j = 0; j < nformats; j++) {
if (CORE_AUDIO_FORMAT_IS_SPDIF (formats[j])) {
is_spdif = TRUE;
break;
}
}
if (is_spdif) {
/* if this stream supports a digital (cac3) format,
* then go set it. */
gint requested_rate_format = -1;
gint current_rate_format = -1;
gint backup_rate_format = -1;
osxbuf->stream_id = streams[i];
osxbuf->stream_idx = i;
if (!osxbuf->revert_format) {
if (!_audio_stream_get_current_format (osxbuf->stream_id,
&osxbuf->original_format)) {
GST_WARNING ("format could not be saved");
g_free (formats);
continue;
}
osxbuf->revert_format = TRUE;
}
for (j = 0; j < nformats; j++) {
if (CORE_AUDIO_FORMAT_IS_SPDIF (formats[j])) {
GST_LOG ("found stream format: " CORE_AUDIO_FORMAT,
CORE_AUDIO_FORMAT_ARGS (formats[j].mFormat));
if (formats[j].mFormat.mSampleRate == format.mSampleRate) {
requested_rate_format = j;
break;
} else if (formats[j].mFormat.mSampleRate ==
osxbuf->original_format.mSampleRate) {
current_rate_format = j;
} else {
if (backup_rate_format < 0 ||
formats[j].mFormat.mSampleRate >
formats[backup_rate_format].mFormat.mSampleRate) {
backup_rate_format = j;
}
}
}
}
if (requested_rate_format >= 0) {
/* We prefer to output at the rate of the original audio */
osxbuf->stream_format = formats[requested_rate_format].mFormat;
} else if (current_rate_format >= 0) {
/* If not possible, we will try to use the current rate */
osxbuf->stream_format = formats[current_rate_format].mFormat;
} else {
/* And if we have to, any digital format will be just
* fine (highest rate possible) */
osxbuf->stream_format = formats[backup_rate_format].mFormat;
}
}
g_free (formats);
}
}
g_free (streams);
GST_DEBUG ("original stream format: " CORE_AUDIO_FORMAT,
CORE_AUDIO_FORMAT_ARGS (osxbuf->original_format));
if (!_audio_stream_change_format (osxbuf->stream_id, osxbuf->stream_format))
goto done;
GST_DEBUG_OBJECT (osxbuf, "osx ring buffer acquired");
ret = TRUE;
done:
return ret;
}
static gboolean
gst_osx_ring_buffer_acquire_analog (GstOsxRingBuffer * osxbuf,
AudioStreamBasicDescription format, GstCaps * caps)
{
/* Configure the output stream and allocate ringbuffer memory */
AudioChannelLayout *layout = NULL;
OSStatus status;
UInt32 propertySize;
int channels = format.mChannelsPerFrame;
int layoutSize;
int element;
int i;
AudioUnitScope scope;
gboolean ret = FALSE;
GstStructure *structure;
GstAudioChannelPosition *positions;
UInt32 frameSize;
/* Describe channels */
layoutSize = sizeof (AudioChannelLayout) +
channels * sizeof (AudioChannelDescription);
layout = g_malloc (layoutSize);
structure = gst_caps_get_structure (caps, 0);
positions = gst_audio_get_channel_positions (structure);
layout->mChannelLayoutTag = kAudioChannelLayoutTag_UseChannelDescriptions;
layout->mChannelBitmap = 0; /* Not used */
layout->mNumberChannelDescriptions = channels;
for (i = 0; i < channels; i++) {
if (positions) {
layout->mChannelDescriptions[i].mChannelLabel =
gst_audio_channel_position_to_coreaudio_channel_label (positions[i],
i);
} else {
/* Discrete channel numbers are ORed into this */
layout->mChannelDescriptions[i].mChannelLabel =
kAudioChannelLabel_Discrete_0 | i;
}
/* Others unused */
layout->mChannelDescriptions[i].mChannelFlags = 0;
layout->mChannelDescriptions[i].mCoordinates[0] = 0.f;
layout->mChannelDescriptions[i].mCoordinates[1] = 0.f;
layout->mChannelDescriptions[i].mCoordinates[2] = 0.f;
}
if (positions) {
g_free (positions);
positions = NULL;
}
GST_DEBUG_OBJECT (osxbuf, "Setting format for AudioUnit");
scope = osxbuf->is_src ? kAudioUnitScope_Output : kAudioUnitScope_Input;
element = osxbuf->is_src ? 1 : 0;
propertySize = sizeof (AudioStreamBasicDescription);
status = AudioUnitSetProperty (osxbuf->audiounit,
kAudioUnitProperty_StreamFormat, scope, element, &format, propertySize);
if (status) {
GST_WARNING_OBJECT (osxbuf,
"Failed to set audio description: %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (status));
goto done;
}
if (layoutSize) {
status = AudioUnitSetProperty (osxbuf->audiounit,
kAudioUnitProperty_AudioChannelLayout,
scope, element, layout, layoutSize);
if (status) {
GST_WARNING_OBJECT (osxbuf,
"Failed to set output channel layout: %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (status));
goto done;
}
}
/* create AudioBufferList needed for recording */
if (osxbuf->is_src) {
propertySize = sizeof (frameSize);
status = AudioUnitGetProperty (osxbuf->audiounit, kAudioDevicePropertyBufferFrameSize, kAudioUnitScope_Global, 0, /* N/A for global */
&frameSize, &propertySize);
if (status) {
GST_WARNING_OBJECT (osxbuf, "Failed to get frame size: %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (status));
goto done;
}
osxbuf->recBufferList = buffer_list_alloc (channels,
frameSize * format.mBytesPerFrame);
}
/* Specify which device we're using. */
GST_DEBUG_OBJECT (osxbuf, "Bind AudioUnit to device %d",
(int) osxbuf->device_id);
status = AudioUnitSetProperty (osxbuf->audiounit, kAudioOutputUnitProperty_CurrentDevice, kAudioUnitScope_Global, 0, /* N/A for global */
&osxbuf->device_id, sizeof (AudioDeviceID));
if (status) {
GST_ERROR_OBJECT (osxbuf, "Failed binding to device: %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (status));
goto audiounit_error;
}
/* Initialize the AudioUnit */
status = AudioUnitInitialize (osxbuf->audiounit);
if (status) {
GST_ERROR_OBJECT (osxbuf, "Failed to initialise AudioUnit: %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (status));
goto audiounit_error;
}
GST_DEBUG_OBJECT (osxbuf, "osx ring buffer acquired");
ret = TRUE;
done:
g_free (layout);
return ret;
audiounit_error:
if (osxbuf->recBufferList) {
buffer_list_free (osxbuf->recBufferList);
osxbuf->recBufferList = NULL;
}
return ret;
}
static gboolean
gst_osx_ring_buffer_acquire (GstRingBuffer * buf, GstRingBufferSpec * spec)
{
gboolean ret = FALSE;
GstOsxRingBuffer *osxbuf;
AudioStreamBasicDescription format;
osxbuf = GST_OSX_RING_BUFFER (buf);
if (RINGBUFFER_IS_SPDIF (spec->type)) {
format.mFormatID = kAudioFormat60958AC3;
format.mSampleRate = (double) spec->rate;
format.mChannelsPerFrame = 2;
format.mFormatFlags = kAudioFormatFlagIsSignedInteger |
kAudioFormatFlagIsPacked | kAudioFormatFlagIsNonMixable;
format.mBytesPerFrame = 0;
format.mBitsPerChannel = 16;
format.mBytesPerPacket = 6144;
format.mFramesPerPacket = 1536;
format.mReserved = 0;
spec->segsize = 6144;
spec->segtotal = 10;
osxbuf->is_passthrough = TRUE;
} else {
int width, depth;
/* Fill out the audio description we're going to be using */
format.mFormatID = kAudioFormatLinearPCM;
format.mSampleRate = (double) spec->rate;
format.mChannelsPerFrame = spec->channels;
if (spec->type == GST_BUFTYPE_FLOAT) {
format.mFormatFlags = kAudioFormatFlagsNativeFloatPacked;
width = depth = spec->width;
} else {
format.mFormatFlags = kAudioFormatFlagIsSignedInteger;
width = spec->width;
depth = spec->depth;
if (width == depth) {
format.mFormatFlags |= kAudioFormatFlagIsPacked;
} else {
format.mFormatFlags |= kAudioFormatFlagIsAlignedHigh;
}
if (spec->bigend) {
format.mFormatFlags |= kAudioFormatFlagIsBigEndian;
}
}
format.mBytesPerFrame = spec->channels * (width >> 3);
format.mBitsPerChannel = depth;
format.mBytesPerPacket = spec->channels * (width >> 3);
format.mFramesPerPacket = 1;
format.mReserved = 0;
spec->segsize =
(spec->latency_time * spec->rate / G_USEC_PER_SEC) *
spec->bytes_per_sample;
spec->segtotal = spec->buffer_time / spec->latency_time;
osxbuf->stream_idx = 0;
osxbuf->is_passthrough = FALSE;
}
GST_DEBUG_OBJECT (osxbuf, "Format: " CORE_AUDIO_FORMAT,
CORE_AUDIO_FORMAT_ARGS (format));
buf->data = gst_buffer_new_and_alloc (spec->segtotal * spec->segsize);
memset (GST_BUFFER_DATA (buf->data), 0, GST_BUFFER_SIZE (buf->data));
if (osxbuf->is_passthrough) {
ret = gst_osx_ring_buffer_acquire_spdif (osxbuf, format);
if (ret) {
gst_osx_ring_buffer_monitorize_spdif (osxbuf);
}
} else {
ret = gst_osx_ring_buffer_acquire_analog (osxbuf, format, spec->caps);
}
if (!ret) {
gst_buffer_unref (buf->data);
buf->data = NULL;
}
osxbuf->segoffset = 0;
return ret;
}
static gboolean
gst_osx_ring_buffer_release (GstRingBuffer * buf)
{
GstOsxRingBuffer *osxbuf;
osxbuf = GST_OSX_RING_BUFFER (buf);
AudioUnitUninitialize (osxbuf->audiounit);
gst_buffer_unref (buf->data);
buf->data = NULL;
if (osxbuf->recBufferList) {
buffer_list_free (osxbuf->recBufferList);
osxbuf->recBufferList = NULL;
}
return TRUE;
}
static OSStatus
gst_osx_ring_buffer_render_notify (GstOsxRingBuffer * osxbuf,
AudioUnitRenderActionFlags * ioActionFlags,
const AudioTimeStamp * inTimeStamp,
unsigned int inBusNumber,
unsigned int inNumberFrames, AudioBufferList * ioData)
{
/* Before rendering a frame, we get the PreRender notification.
* Here, we detach the RenderCallback if we've been paused.
*
* This is necessary (rather than just directly detaching it) to
* work around some thread-safety issues in CoreAudio
*/
if ((*ioActionFlags) & kAudioUnitRenderAction_PreRender) {
if (osxbuf->io_proc_needs_deactivation) {
gst_osx_ring_buffer_remove_render_callback (osxbuf);
}
}
return noErr;
}
static void
gst_osx_ring_buffer_remove_render_callback (GstOsxRingBuffer * osxbuf)
{
AURenderCallbackStruct input;
OSStatus status;
/* Deactivate the render callback by calling SetRenderCallback
* with a NULL inputProc.
*/
input.inputProc = NULL;
input.inputProcRefCon = NULL;
status = AudioUnitSetProperty (osxbuf->audiounit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Global, 0, /* N/A for global */
&input, sizeof (input));
if (status) {
GST_WARNING_OBJECT (osxbuf, "Failed to remove render callback %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (status));
}
/* Remove the RenderNotify too */
status = AudioUnitRemoveRenderNotify (osxbuf->audiounit,
(AURenderCallback) gst_osx_ring_buffer_render_notify, osxbuf);
if (status) {
GST_WARNING_OBJECT (osxbuf,
"Failed to remove render notify callback %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (status));
}
/* We're deactivated.. */
osxbuf->io_proc_needs_deactivation = FALSE;
osxbuf->io_proc_active = FALSE;
}
static gboolean
gst_osx_ring_buffer_io_proc_start (GstOsxRingBuffer * osxbuf)
{
OSStatus status;
AURenderCallbackStruct input;
AudioUnitPropertyID callback_type;
GST_DEBUG ("osx ring buffer start ioproc: %p device_id %lu",
2009-10-09 10:11:12 +00:00
osxbuf->element->io_proc, (gulong) osxbuf->device_id);
if (!osxbuf->io_proc_active) {
callback_type = osxbuf->is_src ?
kAudioOutputUnitProperty_SetInputCallback :
kAudioUnitProperty_SetRenderCallback;
input.inputProc = (AURenderCallback) osxbuf->element->io_proc;
input.inputProcRefCon = osxbuf;
status = AudioUnitSetProperty (osxbuf->audiounit, callback_type, kAudioUnitScope_Global, 0, /* N/A for global */
&input, sizeof (input));
if (status) {
GST_ERROR ("AudioUnitSetProperty failed: %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (status));
return FALSE;
}
// ### does it make sense to do this notify stuff for input mode?
status = AudioUnitAddRenderNotify (osxbuf->audiounit,
(AURenderCallback) gst_osx_ring_buffer_render_notify, osxbuf);
if (status) {
GST_ERROR ("AudioUnitAddRenderNotify failed %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (status));
return FALSE;
}
osxbuf->io_proc_active = TRUE;
}
osxbuf->io_proc_needs_deactivation = FALSE;
status = AudioOutputUnitStart (osxbuf->audiounit);
if (status) {
GST_ERROR ("AudioOutputUnitStart failed: %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (status));
return FALSE;
}
return TRUE;
}
static gboolean
gst_osx_ring_buffer_io_proc_stop (GstOsxRingBuffer * osxbuf)
{
OSErr status;
GST_DEBUG ("osx ring buffer stop ioproc: %p device_id %lu",
2009-10-09 10:11:12 +00:00
osxbuf->element->io_proc, (gulong) osxbuf->device_id);
status = AudioOutputUnitStop (osxbuf->audiounit);
if (status) {
GST_WARNING ("AudioOutputUnitStop failed: %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (status));
}
// ###: why is it okay to directly remove from here but not from pause() ?
if (osxbuf->io_proc_active) {
gst_osx_ring_buffer_remove_render_callback (osxbuf);
}
return TRUE;
}
static void
gst_osx_ring_buffer_remove_render_spdif_callback (GstOsxRingBuffer * osxbuf)
{
OSStatus status;
/* Deactivate the render callback by calling
* AudioDeviceDestroyIOProcID */
status = AudioDeviceDestroyIOProcID (osxbuf->device_id, osxbuf->procID);
if (status != noErr) {
GST_ERROR ("AudioDeviceDestroyIOProcID failed: %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (status));
}
GST_DEBUG ("osx ring buffer removed ioproc ID: %p device_id %lu",
osxbuf->procID, (gulong) osxbuf->device_id);
/* We're deactivated.. */
osxbuf->procID = 0;
osxbuf->io_proc_needs_deactivation = FALSE;
osxbuf->io_proc_active = FALSE;
}
static gboolean
gst_osx_ring_buffer_io_proc_spdif_start (GstOsxRingBuffer * osxbuf)
{
OSErr status;
GST_DEBUG ("osx ring buffer start ioproc ID: %p device_id %lu",
osxbuf->procID, (gulong) osxbuf->device_id);
if (!osxbuf->io_proc_active) {
/* Add IOProc callback */
status = AudioDeviceCreateIOProcID (osxbuf->device_id,
(AudioDeviceIOProc) gst_osx_ring_buffer_io_proc_spdif,
(void *) osxbuf, &osxbuf->procID);
if (status != noErr) {
GST_ERROR ("AudioDeviceCreateIOProcID failed: %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (status));
return FALSE;
}
osxbuf->io_proc_active = TRUE;
}
osxbuf->io_proc_needs_deactivation = FALSE;
/* Start device */
status = AudioDeviceStart (osxbuf->device_id, osxbuf->procID);
if (status != noErr) {
GST_ERROR ("AudioDeviceStart failed: %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (status));
return FALSE;
}
return TRUE;
}
static gboolean
gst_osx_ring_buffer_io_proc_spdif_stop (GstOsxRingBuffer * osxbuf)
{
OSErr status;
/* Stop device */
status = AudioDeviceStop (osxbuf->device_id, osxbuf->procID);
if (status != noErr) {
GST_ERROR ("AudioDeviceStop failed: %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (status));
}
GST_DEBUG ("osx ring buffer stop ioproc ID: %p device_id %lu",
osxbuf->procID, (gulong) osxbuf->device_id);
if (osxbuf->io_proc_active) {
gst_osx_ring_buffer_remove_render_spdif_callback (osxbuf);
}
gst_osx_ring_buffer_close_spdif (osxbuf);
return TRUE;
}
static gboolean
gst_osx_ring_buffer_start (GstRingBuffer * buf)
{
GstOsxRingBuffer *osxbuf;
osxbuf = GST_OSX_RING_BUFFER (buf);
if (osxbuf->is_passthrough) {
return gst_osx_ring_buffer_io_proc_spdif_start (osxbuf);
} else {
return gst_osx_ring_buffer_io_proc_start (osxbuf);
}
}
static gboolean
gst_osx_ring_buffer_pause (GstRingBuffer * buf)
{
GstOsxRingBuffer *osxbuf = GST_OSX_RING_BUFFER (buf);
if (osxbuf->is_passthrough) {
GST_DEBUG ("osx ring buffer pause ioproc ID: %p device_id %lu",
osxbuf->procID, (gulong) osxbuf->device_id);
if (osxbuf->io_proc_active) {
gst_osx_ring_buffer_remove_render_spdif_callback (osxbuf);
}
} else {
GST_DEBUG ("osx ring buffer pause ioproc: %p device_id %lu",
osxbuf->element->io_proc, (gulong) osxbuf->device_id);
if (osxbuf->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
*/
osxbuf->io_proc_needs_deactivation = TRUE;
}
}
return TRUE;
}
static gboolean
gst_osx_ring_buffer_stop (GstRingBuffer * buf)
{
GstOsxRingBuffer *osxbuf;
osxbuf = GST_OSX_RING_BUFFER (buf);
if (osxbuf->is_passthrough) {
gst_osx_ring_buffer_io_proc_spdif_stop (osxbuf);
} else {
gst_osx_ring_buffer_io_proc_stop (osxbuf);
}
return TRUE;
}
static guint
gst_osx_ring_buffer_delay (GstRingBuffer * buf)
{
double latency;
UInt32 size = sizeof (double);
GstOsxRingBuffer *osxbuf;
OSStatus status;
guint samples;
osxbuf = GST_OSX_RING_BUFFER (buf);
if (osxbuf->is_passthrough) {
samples = _audio_device_get_latency (osxbuf->device_id);
samples += _audio_stream_get_latency (osxbuf->stream_id);
latency = (double) samples / GST_RING_BUFFER (buf)->spec.rate;
} else {
status = AudioUnitGetProperty (osxbuf->audiounit, kAudioUnitProperty_Latency, kAudioUnitScope_Global, 0, /* N/A for global */
&latency, &size);
if (status) {
GST_WARNING_OBJECT (buf, "Failed to get latency: %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (status));
return 0;
}
samples = latency * GST_RING_BUFFER (buf)->spec.rate;
}
GST_DEBUG_OBJECT (buf, "Got latency: %f seconds -> %d samples",
latency, samples);
return samples;
}