mpv/audio/out/ao_coreaudio.c

446 lines
15 KiB
C

/*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <CoreAudio/HostTime.h>
#include "config.h"
#include "ao.h"
#include "internal.h"
#include "audio/format.h"
#include "osdep/timer.h"
#include "options/m_option.h"
#include "misc/ring.h"
#include "common/msg.h"
#include "audio/out/ao_coreaudio_properties.h"
#include "audio/out/ao_coreaudio_utils.h"
struct priv {
AudioDeviceID device;
AudioUnit audio_unit;
uint64_t hw_latency_us;
};
bool ca_layout_to_mp_chmap(struct ao *ao, AudioChannelLayout *layout,
struct mp_chmap *chmap);
static int64_t ca_frames_to_us(struct ao *ao, uint32_t frames)
{
return frames / (float) ao->samplerate * 1e6;
}
static int64_t ca_get_hardware_latency(struct ao *ao) {
struct priv *p = ao->priv;
double audiounit_latency_sec = 0.0;
uint32_t size = sizeof(audiounit_latency_sec);
OSStatus err = AudioUnitGetProperty(
p->audio_unit,
kAudioUnitProperty_Latency,
kAudioUnitScope_Global,
0,
&audiounit_latency_sec,
&size);
CHECK_CA_ERROR("cannot get audio unit latency");
uint32_t frames = 0;
err = CA_GET_O(p->device, kAudioDevicePropertyLatency, &frames);
CHECK_CA_ERROR("cannot get device latency");
uint64_t audiounit_latency_us = audiounit_latency_sec * 1e6;
uint64_t device_latency_us = ca_frames_to_us(ao, frames);
MP_VERBOSE(ao, "audiounit latency [us]: %lld\n", audiounit_latency_us);
MP_VERBOSE(ao, "device latency [us]: %lld\n", device_latency_us);
return audiounit_latency_us + device_latency_us;
coreaudio_error:
return 0;
}
static int64_t ca_get_latency(const AudioTimeStamp *ts)
{
uint64_t out = AudioConvertHostTimeToNanos(ts->mHostTime);
uint64_t now = AudioConvertHostTimeToNanos(AudioGetCurrentHostTime());
if (now > out)
return 0;
return (out - now) * 1e-3;
}
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;
AudioBuffer buf = buffer_list->mBuffers[0];
int64_t end = mp_time_us();
end += p->hw_latency_us + ca_get_latency(ts) + ca_frames_to_us(ao, frames);
ao_read_data(ao, &buf.mData, frames, end);
return noErr;
}
static int get_volume(struct ao *ao, struct ao_control_vol *vol) {
struct priv *p = ao->priv;
float auvol;
OSStatus err =
AudioUnitGetParameter(p->audio_unit, kHALOutputParam_Volume,
kAudioUnitScope_Global, 0, &auvol);
CHECK_CA_ERROR("could not get HAL output volume");
vol->left = vol->right = auvol * 100.0;
return CONTROL_TRUE;
coreaudio_error:
return CONTROL_ERROR;
}
static int set_volume(struct ao *ao, struct ao_control_vol *vol) {
struct priv *p = ao->priv;
float auvol = (vol->left + vol->right) / 200.0;
OSStatus err =
AudioUnitSetParameter(p->audio_unit, kHALOutputParam_Volume,
kAudioUnitScope_Global, 0, auvol, 0);
CHECK_CA_ERROR("could not set HAL output volume");
return CONTROL_TRUE;
coreaudio_error:
return CONTROL_ERROR;
}
static int control(struct ao *ao, enum aocontrol cmd, void *arg)
{
switch (cmd) {
case AOCONTROL_GET_VOLUME:
return get_volume(ao, arg);
case AOCONTROL_SET_VOLUME:
return set_volume(ao, arg);
case AOCONTROL_HAS_SOFT_VOLUME:
return CONTROL_TRUE;
case AOCONTROL_HAS_PER_APP_VOLUME:
return CONTROL_TRUE;
}
return CONTROL_UNKNOWN;
}
static bool init_chmap(struct ao *ao);
static bool init_audiounit(struct ao *ao, AudioStreamBasicDescription asbd);
static int init(struct ao *ao)
{
if (AF_FORMAT_IS_IEC61937(ao->format)) {
MP_WARN(ao, "detected IEC61937, redirecting to coreaudio_exclusive\n");
ao->redirect = "coreaudio_exclusive";
return CONTROL_ERROR;
}
struct priv *p = ao->priv;
OSStatus err = ca_select_device(ao, ao->device, &p->device);
CHECK_CA_ERROR("failed to select device");
if (!init_chmap(ao))
goto coreaudio_error;
ao->format = af_fmt_from_planar(ao->format);
AudioStreamBasicDescription asbd;
ca_fill_asbd(ao, &asbd);
if (!init_audiounit(ao, asbd))
goto coreaudio_error;
return CONTROL_OK;
coreaudio_error:
return CONTROL_ERROR;
}
static bool init_chmap(struct ao *ao)
{
struct priv *p = ao->priv;
OSStatus err;
AudioChannelLayout *layouts;
size_t n_layouts;
err = CA_GET_ARY_O(p->device,
kAudioDevicePropertyPreferredChannelLayout,
&layouts, &n_layouts);
CHECK_CA_ERROR("could not get audio device prefered layouts");
struct mp_chmap_sel chmap_sel = {0};
for (int i = 0; i < n_layouts; i++) {
struct mp_chmap chmap = {0};
if (ca_layout_to_mp_chmap(ao, &layouts[i], &chmap))
mp_chmap_sel_add_map(&chmap_sel, &chmap);
}
talloc_free(layouts);
if (ao->channels.num < 3) {
struct mp_chmap chmap;
mp_chmap_from_channels(&chmap, ao->channels.num);
mp_chmap_sel_add_map(&chmap_sel, &chmap);
}
if (!ao_chmap_sel_adjust(ao, &chmap_sel, &ao->channels)) {
MP_ERR(ao, "could not select a suitable channel map among the "
"hardware supported ones. Make sure to configure your "
"output device correctly in 'Audio MIDI Setup.app'\n");
goto coreaudio_error;
}
return true;
coreaudio_error:
return false;
}
static bool init_audiounit(struct ao *ao, AudioStreamBasicDescription asbd)
{
OSStatus err;
uint32_t size;
struct priv *p = ao->priv;
AudioComponentDescription desc = (AudioComponentDescription) {
.componentType = kAudioUnitType_Output,
.componentSubType = (ao->device) ?
kAudioUnitSubType_HALOutput :
kAudioUnitSubType_DefaultOutput,
.componentManufacturer = kAudioUnitManufacturer_Apple,
.componentFlags = 0,
.componentFlagsMask = 0,
};
AudioComponent comp = AudioComponentFindNext(NULL, &desc);
if (comp == NULL) {
MP_ERR(ao, "unable to find audio component\n");
goto coreaudio_error;
}
err = AudioComponentInstanceNew(comp, &(p->audio_unit));
CHECK_CA_ERROR("unable to open audio component");
err = AudioUnitInitialize(p->audio_unit);
CHECK_CA_ERROR_L(coreaudio_error_component,
"unable to initialize audio unit");
size = sizeof(AudioStreamBasicDescription);
err = AudioUnitSetProperty(p->audio_unit,
kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Input, 0, &asbd, size);
CHECK_CA_ERROR_L(coreaudio_error_audiounit,
"unable to set the input format on the audio unit");
err = AudioUnitSetProperty(p->audio_unit,
kAudioOutputUnitProperty_CurrentDevice,
kAudioUnitScope_Global, 0, &p->device,
sizeof(p->device));
CHECK_CA_ERROR_L(coreaudio_error_audiounit,
"can't link audio unit to selected device");
p->hw_latency_us = ca_get_hardware_latency(ao);
AURenderCallbackStruct render_cb = (AURenderCallbackStruct) {
.inputProc = render_cb_lpcm,
.inputProcRefCon = ao,
};
err = AudioUnitSetProperty(p->audio_unit,
kAudioUnitProperty_SetRenderCallback,
kAudioUnitScope_Input, 0, &render_cb,
sizeof(AURenderCallbackStruct));
CHECK_CA_ERROR_L(coreaudio_error_audiounit,
"unable to set render callback on audio unit");
return true;
coreaudio_error_audiounit:
AudioUnitUninitialize(p->audio_unit);
coreaudio_error_component:
AudioComponentInstanceDispose(p->audio_unit);
coreaudio_error:
return false;
}
static void stop(struct ao *ao)
{
struct priv *p = ao->priv;
OSStatus err = AudioOutputUnitStop(p->audio_unit);
CHECK_CA_WARN("can't stop audio unit");
}
static void start(struct ao *ao)
{
struct priv *p = ao->priv;
OSStatus err = AudioOutputUnitStart(p->audio_unit);
CHECK_CA_WARN("can't start audio unit");
}
static void uninit(struct ao *ao)
{
struct priv *p = ao->priv;
AudioOutputUnitStop(p->audio_unit);
AudioUnitUninitialize(p->audio_unit);
AudioComponentInstanceDispose(p->audio_unit);
}
// Channel Mapping functions
static const int speaker_map[][2] = {
{ kAudioChannelLabel_Left, MP_SPEAKER_ID_FL },
{ kAudioChannelLabel_Right, MP_SPEAKER_ID_FR },
{ kAudioChannelLabel_Center, MP_SPEAKER_ID_FC },
{ kAudioChannelLabel_LFEScreen, MP_SPEAKER_ID_LFE },
{ kAudioChannelLabel_LeftSurround, MP_SPEAKER_ID_BL },
{ kAudioChannelLabel_RightSurround, MP_SPEAKER_ID_BR },
{ kAudioChannelLabel_LeftCenter, MP_SPEAKER_ID_FLC },
{ kAudioChannelLabel_RightCenter, MP_SPEAKER_ID_FRC },
{ kAudioChannelLabel_CenterSurround, MP_SPEAKER_ID_BC },
{ kAudioChannelLabel_LeftSurroundDirect, MP_SPEAKER_ID_SL },
{ kAudioChannelLabel_RightSurroundDirect, MP_SPEAKER_ID_SR },
{ kAudioChannelLabel_TopCenterSurround, MP_SPEAKER_ID_TC },
{ kAudioChannelLabel_VerticalHeightLeft, MP_SPEAKER_ID_TFL },
{ kAudioChannelLabel_VerticalHeightCenter, MP_SPEAKER_ID_TFC },
{ kAudioChannelLabel_VerticalHeightRight, MP_SPEAKER_ID_TFR },
{ kAudioChannelLabel_TopBackLeft, MP_SPEAKER_ID_TBL },
{ kAudioChannelLabel_TopBackCenter, MP_SPEAKER_ID_TBC },
{ kAudioChannelLabel_TopBackRight, MP_SPEAKER_ID_TBR },
// unofficial extensions
{ kAudioChannelLabel_RearSurroundLeft, MP_SPEAKER_ID_SDL },
{ kAudioChannelLabel_RearSurroundRight, MP_SPEAKER_ID_SDR },
{ kAudioChannelLabel_LeftWide, MP_SPEAKER_ID_WL },
{ kAudioChannelLabel_RightWide, MP_SPEAKER_ID_WR },
{ kAudioChannelLabel_LFE2, MP_SPEAKER_ID_LFE2 },
{ kAudioChannelLabel_HeadphonesLeft, MP_SPEAKER_ID_DL },
{ kAudioChannelLabel_HeadphonesRight, MP_SPEAKER_ID_DR },
{ kAudioChannelLabel_Unknown, -1 },
};
static int ca_label_to_mp_speaker_id(AudioChannelLabel label)
{
for (int i = 0; speaker_map[i][1] >= 0; i++)
if (speaker_map[i][0] == label)
return speaker_map[i][1];
return -1;
}
static void ca_log_layout(struct ao *ao, AudioChannelLayout *layout)
{
if (!mp_msg_test(ao->log, MSGL_V))
return;
AudioChannelDescription *descs = layout->mChannelDescriptions;
MP_VERBOSE(ao, "layout: tag: <%d>, bitmap: <%d>, "
"descriptions <%d>\n",
layout->mChannelLayoutTag,
layout->mChannelBitmap,
layout->mNumberChannelDescriptions);
for (int i = 0; i < layout->mNumberChannelDescriptions; i++) {
AudioChannelDescription d = descs[i];
MP_VERBOSE(ao, " - description %d: label <%d, %d>, flags: <%u>, "
"coords: <%f, %f, %f>\n", i,
d.mChannelLabel,
ca_label_to_mp_speaker_id(d.mChannelLabel),
d.mChannelFlags,
d.mCoordinates[0],
d.mCoordinates[1],
d.mCoordinates[2]);
}
}
bool ca_layout_to_mp_chmap(struct ao *ao, AudioChannelLayout *layout,
struct mp_chmap *chmap)
{
AudioChannelLayoutTag tag = layout->mChannelLayoutTag;
uint32_t layout_size = sizeof(layout);
OSStatus err;
if (tag == kAudioChannelLayoutTag_UseChannelBitmap) {
err = AudioFormatGetProperty(kAudioFormatProperty_ChannelLayoutForBitmap,
sizeof(uint32_t),
&layout->mChannelBitmap,
&layout_size,
layout);
CHECK_CA_ERROR("failed to convert channel bitmap to descriptions");
} else if (tag != kAudioChannelLayoutTag_UseChannelDescriptions) {
err = AudioFormatGetProperty(kAudioFormatProperty_ChannelLayoutForTag,
sizeof(AudioChannelLayoutTag),
&layout->mChannelLayoutTag,
&layout_size,
layout);
CHECK_CA_ERROR("failed to convert channel tag to descriptions");
}
ca_log_layout(ao, layout);
// If the channel layout uses channel descriptions, from my
// experiments there are there three possibile cases:
// * The description has a label kAudioChannelLabel_Unknown:
// Can't do anything about this (looks like non surround
// layouts are like this).
// * The description uses positional information: this in
// theory could be used but one would have to map spatial
// positions to labels which is not really feasible.
// * The description has a well known label which can be mapped
// to the waveextensible definition: this is the kind of
// descriptions we process here.
for (int n = 0; n < layout->mNumberChannelDescriptions; n++) {
AudioChannelLabel label = layout->mChannelDescriptions[n].mChannelLabel;
uint8_t speaker = ca_label_to_mp_speaker_id(label);
if (label == kAudioChannelLabel_Unknown)
continue;
if (speaker < 0) {
MP_VERBOSE(ao, "channel label=%d unusable to build channel "
"bitmap, skipping layout\n", label);
} else {
chmap->speaker[n] = speaker;
chmap->num = n + 1;
}
}
return chmap->num > 0;
coreaudio_error:
ca_log_layout(ao, layout);
return false;
}
#define OPT_BASE_STRUCT struct priv
const struct ao_driver audio_out_coreaudio = {
.description = "CoreAudio AudioUnit",
.name = "coreaudio",
.uninit = uninit,
.init = init,
.control = control,
.pause = stop,
.resume = start,
.list_devs = ca_get_device_list,
.priv_size = sizeof(struct priv),
};