static inline gboolean
_audio_stream_is_spdif_avail (AudioStreamID stream_id)
{
AudioStreamRangedDescription *formats;
gint i, nformats = 0;
gboolean res = FALSE;
formats = _audio_stream_get_formats (stream_id, &nformats);
GST_DEBUG ("found %d stream formats", nformats);
if (formats) {
GST_DEBUG ("formats supported on stream ID: %u", (unsigned) stream_id);
for (i = 0; i < nformats; i++) {
GST_DEBUG (" " CORE_AUDIO_FORMAT,
CORE_AUDIO_FORMAT_ARGS (formats[i].mFormat));
if (CORE_AUDIO_FORMAT_IS_SPDIF (formats[i])) {
res = TRUE;
}
}
g_free (formats);
}
return res;
}
static inline gboolean
_acquire_spdif (GstCoreAudio * core_audio, AudioStreamBasicDescription format)
{
AudioStreamID *streams = NULL;
gint i, j, nstreams = 0;
gboolean ret = FALSE;
if (!_open_spdif (core_audio))
goto done;
streams = _audio_device_get_streams (core_audio->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;
core_audio->stream_id = streams[i];
core_audio->stream_idx = i;
if (!core_audio->revert_format) {
if (!_audio_stream_get_current_format (core_audio->stream_id,
&core_audio->original_format)) {
GST_WARNING_OBJECT (core_audio->osxbuf,
"format could not be saved");
g_free (formats);
continue;
}
core_audio->revert_format = TRUE;
}
for (j = 0; j < nformats; j++) {
if (CORE_AUDIO_FORMAT_IS_SPDIF (formats[j])) {
GST_LOG_OBJECT (core_audio->osxbuf,
"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 ==
core_audio->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 */
core_audio->stream_format = formats[requested_rate_format].mFormat;
} else if (current_rate_format >= 0) {
/* If not possible, we will try to use the current rate */
core_audio->stream_format = formats[current_rate_format].mFormat;
} else {
/* And if we have to, any digital format will be just
* fine (highest rate possible) */
core_audio->stream_format = formats[backup_rate_format].mFormat;
}
}
g_free (formats);
}
}
g_free (streams);
GST_DEBUG_OBJECT (core_audio,
"original stream format: " CORE_AUDIO_FORMAT,
CORE_AUDIO_FORMAT_ARGS (core_audio->original_format));
if (!_audio_stream_change_format (core_audio->stream_id,
core_audio->stream_format))
goto done;
ret = TRUE;
done:
return ret;
}
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 */
g_mutex_init (&prop_mutex.lock);
g_cond_init (&prop_mutex.cond);
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: %d", (int) 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_wait_until (&prop_mutex.cond, &prop_mutex.lock, timeout.tv_sec)) {
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: %d", (int) status);
}
/* Destroy the lock and condition */
g_mutex_unlock (&prop_mutex.lock);
g_mutex_clear (&prop_mutex.lock);
g_cond_clear (&prop_mutex.cond);
return ret;
}
static gboolean
gst_osx_audio_ring_buffer_acquire (GstAudioRingBuffer * buf,
GstAudioRingBufferSpec * spec)
{
gboolean ret = FALSE, is_passthrough = FALSE;
GstOsxAudioRingBuffer *osxbuf;
AudioStreamBasicDescription format;
osxbuf = GST_OSX_AUDIO_RING_BUFFER (buf);
if (RINGBUFFER_IS_SPDIF (spec->type)) {
format.mFormatID = kAudioFormat60958AC3;
format.mSampleRate = (double) GST_AUDIO_INFO_RATE (&spec->info);
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;
is_passthrough = TRUE;
} else {
int width, depth;
/* Fill out the audio description we're going to be using */
format.mFormatID = kAudioFormatLinearPCM;
format.mSampleRate = (double) GST_AUDIO_INFO_RATE (&spec->info);
format.mChannelsPerFrame = GST_AUDIO_INFO_CHANNELS (&spec->info);
if (GST_AUDIO_INFO_IS_FLOAT (&spec->info)) {
format.mFormatFlags = kAudioFormatFlagsNativeFloatPacked;
width = depth = GST_AUDIO_INFO_WIDTH (&spec->info);
} else {
format.mFormatFlags = kAudioFormatFlagIsSignedInteger;
width = GST_AUDIO_INFO_WIDTH (&spec->info);
depth = GST_AUDIO_INFO_DEPTH (&spec->info);
if (width == depth) {
format.mFormatFlags |= kAudioFormatFlagIsPacked;
} else {
format.mFormatFlags |= kAudioFormatFlagIsAlignedHigh;
}
}
if (GST_AUDIO_INFO_IS_BIG_ENDIAN (&spec->info)) {
format.mFormatFlags |= kAudioFormatFlagIsBigEndian;
}
format.mBytesPerFrame = GST_AUDIO_INFO_BPF (&spec->info);
format.mBitsPerChannel = depth;
format.mBytesPerPacket = GST_AUDIO_INFO_BPF (&spec->info);
format.mFramesPerPacket = 1;
format.mReserved = 0;
spec->segsize =
(spec->latency_time * GST_AUDIO_INFO_RATE (&spec->info) /
G_USEC_PER_SEC) * GST_AUDIO_INFO_BPF (&spec->info);
spec->segtotal = spec->buffer_time / spec->latency_time;
is_passthrough = FALSE;
}
GST_DEBUG_OBJECT (osxbuf, "Format: " CORE_AUDIO_FORMAT,
CORE_AUDIO_FORMAT_ARGS (format));
/* gst_audio_ring_buffer_set_channel_positions is not called
* since the AUs perform channel reordering themselves.
* (see gst_core_audio_set_channel_layout) */
buf->size = spec->segtotal * spec->segsize;
buf->memory = g_malloc0 (buf->size);
ret = gst_core_audio_initialize (osxbuf->core_audio, format, spec->caps,
is_passthrough);
if (!ret) {
g_free (buf->memory);
buf->memory = NULL;
buf->size = 0;
}
osxbuf->segoffset = 0;
return ret;
}
