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mpv/audio/out/ao_coreaudio.c

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/*
* CoreAudio audio output driver for Mac OS X
*
* original copyright (C) Timothy J. Wood - Aug 2000
* ported to MPlayer libao2 by Dan Christiansen
*
* The S/PDIF part of the code is based on the auhal audio output
* module from VideoLAN:
* Copyright (c) 2006 Derk-Jan Hartman <hartman at videolan dot org>
*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* along with MPlayer; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* The MacOS X CoreAudio framework doesn't mesh as simply as some
* simpler frameworks do. This is due to the fact that CoreAudio pulls
* audio samples rather than having them pushed at it (which is nice
* when you are wanting to do good buffering of audio).
*/
#include "config.h"
#include "audio/out/ao_coreaudio_common.c"
#include "ao.h"
#include "audio/format.h"
#include "core/subopt-helper.h"
#include "core/mp_ring.h"
static void audio_pause(struct ao *ao);
static void audio_resume(struct ao *ao);
static void reset(struct ao *ao);
static void print_buffer(struct mp_ring *buffer)
{
void *tctx = talloc_new(NULL);
ca_msg(MSGL_V, "%s\n", mp_ring_repr(buffer, tctx));
talloc_free(tctx);
}
struct priv_d {
AudioDeviceIOProcID renderCallback; /* Render callback used for SPDIF */
pid_t i_hog_pid; /* Keeps the pid of our hog status. */
AudioStreamID i_stream_id; /* The StreamID that has a cac3 streamformat */
int i_stream_index; /* The index of i_stream_id in an AudioBufferList */
AudioStreamBasicDescription stream_format; /* The format we changed the stream to */
int b_changed_mixing; /* Whether we need to set the mixing mode back */
int b_stream_format_changed; /* Flag for main thread to reset stream's format to digital and reset buffer */
int b_muted; /* Are we muted in digital mode? */
};
struct priv
{
AudioDeviceID i_selected_dev; /* Keeps DeviceID of the selected device. */
int b_supports_digital; /* Does the currently selected device support digital mode? */
int b_digital; /* Are we running in digital mode? */
/* AudioUnit */
AudioUnit theOutputUnit;
int packetSize;
int paused;
struct mp_ring *buffer;
struct priv_d *digital;
};
static int get_ring_size(struct ao *ao)
{
return af_fmt_seconds_to_bytes(
ao->format, 0.5, ao->channels.num, ao->samplerate);
}
static OSStatus render_cb_lpcm(void *ctx, AudioUnitRenderActionFlags *aflags,
const AudioTimeStamp *ts, UInt32 bus,
UInt32 frames, AudioBufferList *buffer_list)
{
struct ao *ao = ctx;
struct priv *p = ao->priv;
int requested = frames * p->packetSize;
AudioBuffer buf = buffer_list->mBuffers[0];
buf.mDataByteSize = mp_ring_read(p->buffer, buf.mData, requested);
return noErr;
}
static OSStatus render_cb_digital(
AudioDeviceID device, const AudioTimeStamp *ts,
const void *in_data, const AudioTimeStamp *in_ts,
AudioBufferList *out_data, const AudioTimeStamp *out_ts, void *ctx)
{
struct ao *ao = ctx;
struct priv *p = ao->priv;
struct priv_d *d = p->digital;
AudioBuffer buf = out_data->mBuffers[d->i_stream_index];
int requested = buf.mDataByteSize;
if (d->b_muted)
mp_ring_drain(p->buffer, requested);
else
mp_ring_read(p->buffer, buf.mData, requested);
return noErr;
}
static int control(struct ao *ao, enum aocontrol cmd, void *arg)
{
struct priv *p = ao->priv;
ao_control_vol_t *control_vol;
OSStatus err;
Float32 vol;
switch (cmd) {
case AOCONTROL_GET_VOLUME:
control_vol = (ao_control_vol_t *)arg;
if (p->b_digital) {
struct priv_d *d = p->digital;
// Digital output has no volume adjust.
int vol = d->b_muted ? 0 : 100;
*control_vol = (ao_control_vol_t) {
.left = vol, .right = vol,
};
return CONTROL_TRUE;
}
err = AudioUnitGetParameter(p->theOutputUnit, kHALOutputParam_Volume,
kAudioUnitScope_Global, 0, &vol);
CHECK_CA_ERROR("could not get HAL output volume");
control_vol->left = control_vol->right = vol * 100.0 / 4.0;
return CONTROL_TRUE;
case AOCONTROL_SET_VOLUME:
control_vol = (ao_control_vol_t *)arg;
if (p->b_digital) {
struct priv_d *d = p->digital;
// Digital output can not set volume. Here we have to return true
// to make mixer forget it. Else mixer will add a soft filter,
// that's not we expected and the filter not support ac3 stream
// will cause mplayer die.
// Although not support set volume, but at least we support mute.
// MPlayer set mute by set volume to zero, we handle it.
if (control_vol->left == 0 && control_vol->right == 0)
d->b_muted = 1;
else
d->b_muted = 0;
return CONTROL_TRUE;
}
vol = (control_vol->left + control_vol->right) * 4.0 / 200.0;
err = AudioUnitSetParameter(p->theOutputUnit, kHALOutputParam_Volume,
kAudioUnitScope_Global, 0, vol, 0);
CHECK_CA_ERROR("could not set HAL output volume");
return CONTROL_TRUE;
} // end switch
return CONTROL_UNKNOWN;
coreaudio_error:
return CONTROL_ERROR;
}
static int AudioStreamChangeFormat(AudioStreamID i_stream_id,
AudioStreamBasicDescription change_format);
static void print_help(void)
{
ca_msg(MSGL_FATAL,
"\n-ao coreaudio commandline help:\n"
"Example: mpv -ao coreaudio:device_id=266\n"
" open Core Audio with output device ID 266.\n"
"\nOptions:\n"
" device_id\n"
" ID of output device to use (0 = default device)\n"
" help\n"
" This help including list of available devices.\n"
"\n"
"Available output devices:\n");
AudioDeviceID *devs;
uint32_t devs_size =
GetGlobalAudioPropertyArray(kAudioObjectSystemObject,
kAudioHardwarePropertyDevices,
(void **)&devs);
if (!devs_size) {
ca_msg(MSGL_FATAL, "Failed to get list of output devices.\n");
return;
}
int devs_n = devs_size / sizeof(AudioDeviceID);
for (int i = 0; i < devs_n; ++i) {
char *name;
OSStatus err =
GetAudioPropertyString(devs[i], kAudioObjectPropertyName, &name);
if (err == noErr) {
ca_msg(MSGL_FATAL, "%s (id: %" PRIu32 ")\n", name, devs[i]);
free(name);
} else
ca_msg(MSGL_FATAL, "Unknown (id: %" PRIu32 ")\n", devs[i]);
}
free(devs);
}
static int init_lpcm(struct ao *ao, AudioStreamBasicDescription asbd);
static int init_digital(struct ao *ao, AudioStreamBasicDescription asbd);
static int init(struct ao *ao, char *params)
{
OSStatus err;
int device_opt = -1, help_opt = 0;
const opt_t subopts[] = {
{"device_id", OPT_ARG_INT, &device_opt, NULL},
{"help", OPT_ARG_BOOL, &help_opt, NULL},
{NULL}
};
if (subopt_parse(params, subopts) != 0) {
print_help();
return 0;
}
if (help_opt)
print_help();
struct priv *p = talloc_zero(ao, struct priv);
*p = (struct priv) {
.i_selected_dev = 0,
.b_supports_digital = 0,
.b_digital = 0,
};
struct priv_d *d= talloc_zero(p, struct priv_d);
*d = (struct priv_d) {
.b_muted = 0,
.b_stream_format_changed = 0,
.i_hog_pid = -1,
.i_stream_id = 0,
.i_stream_index = -1,
.b_changed_mixing = 0,
};
p->digital = d;
ao->priv = p;
ao->per_application_mixer = true;
ao->no_persistent_volume = true;
AudioDeviceID selected_device = 0;
if (device_opt < 0) {
// device not set by user, get the default one
err = GetAudioProperty(kAudioObjectSystemObject,
kAudioHardwarePropertyDefaultOutputDevice,
sizeof(uint32_t), &selected_device);
CHECK_CA_ERROR("could not get default audio device");
} else {
selected_device = device_opt;
}
char *device_name;
err = GetAudioPropertyString(selected_device,
kAudioObjectPropertyName,
&device_name);
CHECK_CA_ERROR("could not get selected audio device name");
ca_msg(MSGL_V,
"selected audio output device: %s (%" PRIu32 ")\n",
device_name, selected_device);
free(device_name);
// Save selected device id
p->i_selected_dev = selected_device;
struct mp_chmap_sel chmap_sel = {0};
mp_chmap_sel_add_waveext(&chmap_sel);
if (!ao_chmap_sel_adjust(ao, &chmap_sel, &ao->channels))
goto coreaudio_error;
// Build ASBD for the input format
AudioStreamBasicDescription asbd;
asbd.mSampleRate = ao->samplerate;
asbd.mFormatID = p->b_supports_digital ?
kAudioFormat60958AC3 : kAudioFormatLinearPCM;
asbd.mChannelsPerFrame = ao->channels.num;
asbd.mBitsPerChannel = af_fmt2bits(ao->format);
asbd.mFormatFlags = kAudioFormatFlagIsPacked;
if ((ao->format & AF_FORMAT_POINT_MASK) == AF_FORMAT_F)
asbd.mFormatFlags |= kAudioFormatFlagIsFloat;
if ((ao->format & AF_FORMAT_SIGN_MASK) == AF_FORMAT_SI)
asbd.mFormatFlags |= kAudioFormatFlagIsSignedInteger;
if ((ao->format & AF_FORMAT_END_MASK) == AF_FORMAT_BE)
asbd.mFormatFlags |= kAudioFormatFlagIsBigEndian;
asbd.mFramesPerPacket = 1;
p->packetSize = asbd.mBytesPerPacket = asbd.mBytesPerFrame =
asbd.mFramesPerPacket * asbd.mChannelsPerFrame *
(asbd.mBitsPerChannel / 8);
ca_print_asbd("source format:", &asbd);
/* Probe whether device support S/PDIF stream output if input is AC3 stream. */
if (AF_FORMAT_IS_AC3(ao->format)) {
if (AudioDeviceSupportsDigital(selected_device))
p->b_supports_digital = 1;
}
if (p->b_supports_digital)
return init_digital(ao, asbd);
else
return init_lpcm(ao, asbd);
coreaudio_error:
return CONTROL_FALSE;
}
static int init_lpcm(struct ao *ao, AudioStreamBasicDescription asbd)
{
OSStatus err;
uint32_t size;
struct priv *p = ao->priv;
AudioComponentDescription desc = (AudioComponentDescription) {
.componentType = kAudioUnitType_Output,
.componentSubType = kAudioUnitSubType_HALOutput,
.componentManufacturer = kAudioUnitManufacturer_Apple,
.componentFlags = 0,
.componentFlagsMask = 0,
};
AudioComponent comp = AudioComponentFindNext(NULL, &desc);
if (comp == NULL) {
ca_msg(MSGL_ERR, "unable to find audio component\n");
goto coreaudio_error;
}
err = AudioComponentInstanceNew(comp, &(p->theOutputUnit));
CHECK_CA_ERROR("unable to open audio component");
// Initialize AudioUnit
err = AudioUnitInitialize(p->theOutputUnit);
CHECK_CA_ERROR_L(coreaudio_error_component,
"unable to initialize audio unit");
size = sizeof(AudioStreamBasicDescription);
err = AudioUnitSetProperty(p->theOutputUnit,
kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Input, 0, &asbd, size);
CHECK_CA_ERROR_L(coreaudio_error_audiounit,
"unable to set the input format on the audio unit");
//Set the Current Device to the Default Output Unit.
err = AudioUnitSetProperty(p->theOutputUnit,
kAudioOutputUnitProperty_CurrentDevice,
kAudioUnitScope_Global, 0, &p->i_selected_dev,
sizeof(p->i_selected_dev));
p->buffer = mp_ring_new(p, get_ring_size(ao));
print_buffer(p->buffer);
AURenderCallbackStruct render_cb = (AURenderCallbackStruct) {
.inputProc = render_cb_lpcm,
.inputProcRefCon = ao,
};
err = AudioUnitSetProperty(p->theOutputUnit,
kAudioUnitProperty_SetRenderCallback,
kAudioUnitScope_Input, 0, &render_cb,
sizeof(AURenderCallbackStruct));
CHECK_CA_ERROR_L(coreaudio_error_audiounit,
"unable to set render callback on audio unit");
reset(ao);
return CONTROL_OK;
coreaudio_error_audiounit:
AudioUnitUninitialize(p->theOutputUnit);
coreaudio_error_component:
AudioComponentInstanceDispose(p->theOutputUnit);
coreaudio_error:
return CONTROL_FALSE;
}
static int init_digital(struct ao *ao, AudioStreamBasicDescription asbd)
{
struct priv *p = ao->priv;
struct priv_d *d = p->digital;
OSStatus err = noErr;
AudioObjectPropertyAddress p_addr;
uint32_t size;
uint32_t is_alive = 1;
err = GetAudioProperty(p->i_selected_dev,
kAudioDevicePropertyDeviceIsAlive,
sizeof(uint32_t), &is_alive);
CHECK_CA_WARN( "could not check whether device is alive");
if (!is_alive)
ca_msg(MSGL_WARN, "device is not alive\n");
d->stream_format = asbd;
p->b_digital = 1;
err = ca_lock_device(p->i_selected_dev, &d->i_hog_pid);
CHECK_CA_ERROR("faild to set hogmode");
p_addr = (AudioObjectPropertyAddress) {
.mSelector = kAudioDevicePropertySupportsMixing,
.mScope = kAudioObjectPropertyScopeGlobal,
.mElement = kAudioObjectPropertyElementMaster,
};
/* Set mixable to false if we are allowed to. */
if (AudioObjectHasProperty(p->i_selected_dev, &p_addr)) {
Boolean b_writeable = 0;
err = IsAudioPropertySettable(p->i_selected_dev,
kAudioDevicePropertySupportsMixing,
&b_writeable);
if (b_writeable) {
uint32_t mix = 0;
err = SetAudioProperty(p->i_selected_dev,
kAudioDevicePropertySupportsMixing,
sizeof(uint32_t), &mix);
CHECK_CA_ERROR("failed to set mixmode");
d->b_changed_mixing = 1;
}
}
AudioStreamID *streams = NULL;
/* Get a list of all the streams on this device. */
size = GetAudioPropertyArray(p->i_selected_dev,
kAudioDevicePropertyStreams,
kAudioDevicePropertyScopeOutput,
(void **)&streams);
if (!size) {
ca_msg(MSGL_WARN, "could not get number of streams.");
goto coreaudio_error;
}
int streams_n = size / sizeof(AudioStreamID);
// TODO: ++i is quite fishy in here. Investigate!
for (int i = 0; i < streams_n && d->i_stream_index < 0; ++i) {
bool digital = AudioStreamSupportsDigital(streams[i]);
if (digital) {
/* Find a stream with a cac3 stream. */
AudioStreamRangedDescription *formats = NULL;
size = GetGlobalAudioPropertyArray(streams[i],
kAudioStreamPropertyAvailablePhysicalFormats,
(void **)&formats);
if (!size) {
ca_msg(MSGL_WARN, "could not get number of stream formats.\n");
continue; // try next one
}
int formats_n = size / sizeof(AudioStreamRangedDescription);
/* If this stream supports a digital (cac3) format, then set it. */
int req_rate_format = -1;
int max_rate_format = -1;
d->i_stream_id = streams[i];
d->i_stream_index = i;
// TODO: ++j is fishy. was like this in the original code. Investigate!
for (int j = 0; j < formats_n; ++j)
if (AudioFormatIsDigital(asbd)) {
// select the digital format that has exactly the same
// samplerate. If an exact match cannot be found, select
// the format with highest samplerate as backup.
if (formats[j].mFormat.mSampleRate ==
d->stream_format.mSampleRate) {
req_rate_format = j;
break;
} else if (max_rate_format < 0 ||
formats[j].mFormat.mSampleRate >
formats[max_rate_format].mFormat.mSampleRate)
max_rate_format = j;
}
if (req_rate_format >= 0)
d->stream_format = formats[req_rate_format].mFormat;
else
d->stream_format = formats[max_rate_format].mFormat;
free(formats);
}
}
free(streams);
if (d->i_stream_index < 0) {
ca_msg(MSGL_WARN, "can't find any digital output stream format");
goto coreaudio_error;
}
if (!AudioStreamChangeFormat(d->i_stream_id, d->stream_format))
goto coreaudio_error;
p_addr = (AudioObjectPropertyAddress) {
.mSelector = kAudioDevicePropertyDeviceHasChanged,
.mScope = kAudioObjectPropertyScopeGlobal,
.mElement = kAudioObjectPropertyElementMaster,
};
const int *stream_format_changed = &(d->b_stream_format_changed);
err = AudioObjectAddPropertyListener(p->i_selected_dev,
&p_addr,
ca_device_listener,
(void *)stream_format_changed);
CHECK_CA_ERROR("cannot install format change listener during init");
/* FIXME: If output stream is not native byte-order, we need change endian somewhere. */
/* Although there's no such case reported. */
#if BYTE_ORDER == BIG_ENDIAN
if (!(p->stream_format.mFormatFlags & kAudioFormatFlagIsBigEndian))
#else
/* tell mplayer that we need a byteswap on AC3 streams, */
if (d->stream_format.mFormatID & kAudioFormat60958AC3)
ao->format = AF_FORMAT_AC3_LE;
else if (d->stream_format.mFormatFlags & kAudioFormatFlagIsBigEndian)
ca_msg(MSGL_WARN,
"Stream has non-native byte order, digital output may fail");
#endif
ao->samplerate = d->stream_format.mSampleRate;
mp_chmap_from_channels(&ao->channels, d->stream_format.mChannelsPerFrame);
ao->bps = ao->samplerate *
(d->stream_format.mBytesPerPacket /
d->stream_format.mFramesPerPacket);
p->buffer = mp_ring_new(p, get_ring_size(ao));
print_buffer(p->buffer);
err = AudioDeviceCreateIOProcID(p->i_selected_dev,
(AudioDeviceIOProc)render_cb_digital,
(void *)ao,
&d->renderCallback);
CHECK_CA_ERROR("failed to register digital render callback");
reset(ao);
return CONTROL_TRUE;
coreaudio_error:
err = ca_unlock_device(p->i_selected_dev, &d->i_hog_pid);
CHECK_CA_WARN("can't release hog mode");
return CONTROL_FALSE;
}
static int play(struct ao *ao, void *output_samples, int num_bytes, int flags)
{
struct priv *p = ao->priv;
struct priv_d *d = p->digital;
// Check whether we need to reset the digital output stream.
if (p->b_digital && d->b_stream_format_changed) {
d->b_stream_format_changed = 0;
int b_digital = AudioStreamSupportsDigital(d->i_stream_id);
if (b_digital) {
/* Current stream supports digital format output, let's set it. */
ca_msg(MSGL_V,
"Detected current stream supports digital, try to restore digital output...\n");
if (!AudioStreamChangeFormat(d->i_stream_id, d->stream_format))
ca_msg(MSGL_WARN,
"Restoring digital output failed.\n");
else {
ca_msg(MSGL_WARN,
"Restoring digital output succeeded.\n");
reset(ao);
}
} else
ca_msg(MSGL_V,
"Detected current stream does not support digital.\n");
}
int wrote = mp_ring_write(p->buffer, output_samples, num_bytes);
audio_resume(ao);
return wrote;
}
/* set variables and buffer to initial state */
static void reset(struct ao *ao)
{
struct priv *p = ao->priv;
audio_pause(ao);
mp_ring_reset(p->buffer);
}
/* return available space */
static int get_space(struct ao *ao)
{
struct priv *p = ao->priv;
return mp_ring_available(p->buffer);
}
/* return delay until audio is played */
static float get_delay(struct ao *ao)
{
// inaccurate, should also contain the data buffered e.g. by the OS
struct priv *p = ao->priv;
return mp_ring_buffered(p->buffer) / (float)ao->bps;
}
static void uninit(struct ao *ao, bool immed)
{
struct priv *p = ao->priv;
OSStatus err = noErr;
if (!immed) {
long long timeleft =
(1000000LL * mp_ring_buffered(p->buffer)) / ao->bps;
ca_msg(MSGL_DBG2, "%d bytes left @%d bps (%d usec)\n",
mp_ring_buffered(p->buffer), ao->bps, (int)timeleft);
mp_sleep_us((int)timeleft);
}
if (!p->b_digital) {
AudioOutputUnitStop(p->theOutputUnit);
AudioUnitUninitialize(p->theOutputUnit);
AudioComponentInstanceDispose(p->theOutputUnit);
} else {
struct priv_d *d = p->digital;
/* Stop device. */
err = AudioDeviceStop(p->i_selected_dev, d->renderCallback);
if (err != noErr)
ca_msg(MSGL_WARN, "AudioDeviceStop failed: [%4.4s]\n",
(char *)&err);
/* Remove IOProc callback. */
err =
AudioDeviceDestroyIOProcID(p->i_selected_dev, d->renderCallback);
if (err != noErr)
ca_msg(MSGL_WARN,
"AudioDeviceRemoveIOProc failed: [%4.4s]\n", (char *)&err);
if (d->b_changed_mixing) {
UInt32 b_mix;
Boolean b_writeable = 0;
/* Revert mixable to true if we are allowed to. */
err = IsAudioPropertySettable(p->i_selected_dev,
kAudioDevicePropertySupportsMixing,
&b_writeable);
err = GetAudioProperty(p->i_selected_dev,
kAudioDevicePropertySupportsMixing,
sizeof(UInt32), &b_mix);
if (err == noErr && b_writeable) {
b_mix = 1;
err = SetAudioProperty(p->i_selected_dev,
kAudioDevicePropertySupportsMixing,
sizeof(UInt32), &b_mix);
}
if (err != noErr)
ca_msg(MSGL_WARN, "failed to set mixmode: [%4.4s]\n",
(char *)&err);
}
err = ca_unlock_device(p->i_selected_dev, &d->i_hog_pid);
CHECK_CA_WARN("can't release hog mode");
}
}
/* stop playing, keep buffers (for pause) */
static void audio_pause(struct ao *ao)
{
struct priv *p = ao->priv;
OSErr err = noErr;
/* Stop callback. */
if (!p->b_digital) {
err = AudioOutputUnitStop(p->theOutputUnit);
if (err != noErr)
ca_msg(MSGL_WARN, "AudioOutputUnitStop returned [%4.4s]\n",
(char *)&err);
} else {
struct priv_d *d = p->digital;
err = AudioDeviceStop(p->i_selected_dev, d->renderCallback);
if (err != noErr)
ca_msg(MSGL_WARN, "AudioDeviceStop failed: [%4.4s]\n",
(char *)&err);
}
p->paused = 1;
}
/* resume playing, after audio_pause() */
static void audio_resume(struct ao *ao)
{
struct priv *p = ao->priv;
OSErr err = noErr;
if (!p->paused)
return;
/* Start callback. */
if (!p->b_digital) {
err = AudioOutputUnitStart(p->theOutputUnit);
if (err != noErr)
ca_msg(MSGL_WARN,
"AudioOutputUnitStart returned [%4.4s]\n", (char *)&err);
} else {
struct priv_d *d = p->digital;
err = AudioDeviceStart(p->i_selected_dev, d->renderCallback);
if (err != noErr)
ca_msg(MSGL_WARN, "AudioDeviceStart failed: [%4.4s]\n",
(char *)&err);
}
p->paused = 0;
}
const struct ao_driver audio_out_coreaudio = {
.info = &(const struct ao_info) {
"CoreAudio (Native OS X Audio Output)",
"coreaudio",
"Timothy J. Wood, Dan Christiansen, Chris Roccati & Stefano Pigozzi",
"",
},
.uninit = uninit,
.init = init,
.play = play,
.control = control,
.get_space = get_space,
.get_delay = get_delay,
.reset = reset,
.pause = audio_pause,
.resume = audio_resume,
};
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