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dingusppc/thirdparty/libsoundio/src/pulseaudio.c
Maxim Poliakovski f7d67a91e0 New AWAC and sound server implementation.
2020-05-08 23:12:04 +02:00

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/*
* Copyright (c) 2015 Andrew Kelley
*
* This file is part of libsoundio, which is MIT licensed.
* See http://opensource.org/licenses/MIT
*/
#include "pulseaudio.h"
#include "soundio_private.h"
#include <string.h>
#include <stdio.h>
static void subscribe_callback(pa_context *context,
pa_subscription_event_type_t event_bits, uint32_t index, void *userdata)
{
struct SoundIoPrivate *si = (struct SoundIoPrivate *)userdata;
struct SoundIo *soundio = &si->pub;
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
sipa->device_scan_queued = true;
pa_threaded_mainloop_signal(sipa->main_loop, 0);
soundio->on_events_signal(soundio);
}
static int subscribe_to_events(struct SoundIoPrivate *si) {
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
pa_subscription_mask_t events = (pa_subscription_mask_t)(
PA_SUBSCRIPTION_MASK_SINK|PA_SUBSCRIPTION_MASK_SOURCE|PA_SUBSCRIPTION_MASK_SERVER);
pa_operation *subscribe_op = pa_context_subscribe(sipa->pulse_context, events, NULL, si);
if (!subscribe_op)
return SoundIoErrorNoMem;
pa_operation_unref(subscribe_op);
return 0;
}
static void context_state_callback(pa_context *context, void *userdata) {
struct SoundIoPrivate *si = (struct SoundIoPrivate *)userdata;
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
struct SoundIo *soundio = &si->pub;
switch (pa_context_get_state(context)) {
case PA_CONTEXT_UNCONNECTED: // The context hasn't been connected yet.
return;
case PA_CONTEXT_CONNECTING: // A connection is being established.
return;
case PA_CONTEXT_AUTHORIZING: // The client is authorizing itself to the daemon.
return;
case PA_CONTEXT_SETTING_NAME: // The client is passing its application name to the daemon.
return;
case PA_CONTEXT_READY: // The connection is established, the context is ready to execute operations.
sipa->ready_flag = true;
pa_threaded_mainloop_signal(sipa->main_loop, 0);
return;
case PA_CONTEXT_TERMINATED: // The connection was terminated cleanly.
pa_threaded_mainloop_signal(sipa->main_loop, 0);
return;
case PA_CONTEXT_FAILED: // The connection failed or was disconnected.
if (sipa->ready_flag) {
sipa->connection_err = SoundIoErrorBackendDisconnected;
} else {
sipa->connection_err = SoundIoErrorInitAudioBackend;
sipa->ready_flag = true;
}
pa_threaded_mainloop_signal(sipa->main_loop, 0);
soundio->on_events_signal(soundio);
return;
}
}
static void destroy_pa(struct SoundIoPrivate *si) {
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
if (sipa->main_loop)
pa_threaded_mainloop_stop(sipa->main_loop);
pa_context_disconnect(sipa->pulse_context);
pa_context_unref(sipa->pulse_context);
soundio_destroy_devices_info(sipa->current_devices_info);
soundio_destroy_devices_info(sipa->ready_devices_info);
if (sipa->main_loop)
pa_threaded_mainloop_free(sipa->main_loop);
if (sipa->props)
pa_proplist_free(sipa->props);
free(sipa->default_sink_name);
free(sipa->default_source_name);
}
static enum SoundIoFormat from_pulseaudio_format(pa_sample_spec sample_spec) {
switch (sample_spec.format) {
case PA_SAMPLE_U8: return SoundIoFormatU8;
case PA_SAMPLE_S16LE: return SoundIoFormatS16LE;
case PA_SAMPLE_S16BE: return SoundIoFormatS16BE;
case PA_SAMPLE_FLOAT32LE: return SoundIoFormatFloat32LE;
case PA_SAMPLE_FLOAT32BE: return SoundIoFormatFloat32BE;
case PA_SAMPLE_S32LE: return SoundIoFormatS32LE;
case PA_SAMPLE_S32BE: return SoundIoFormatS32BE;
case PA_SAMPLE_S24_32LE: return SoundIoFormatS24LE;
case PA_SAMPLE_S24_32BE: return SoundIoFormatS24BE;
case PA_SAMPLE_MAX:
case PA_SAMPLE_INVALID:
case PA_SAMPLE_ALAW:
case PA_SAMPLE_ULAW:
case PA_SAMPLE_S24LE:
case PA_SAMPLE_S24BE:
return SoundIoFormatInvalid;
}
return SoundIoFormatInvalid;
}
static enum SoundIoChannelId from_pulseaudio_channel_pos(pa_channel_position_t pos) {
switch (pos) {
case PA_CHANNEL_POSITION_MONO: return SoundIoChannelIdFrontCenter;
case PA_CHANNEL_POSITION_FRONT_LEFT: return SoundIoChannelIdFrontLeft;
case PA_CHANNEL_POSITION_FRONT_RIGHT: return SoundIoChannelIdFrontRight;
case PA_CHANNEL_POSITION_FRONT_CENTER: return SoundIoChannelIdFrontCenter;
case PA_CHANNEL_POSITION_REAR_CENTER: return SoundIoChannelIdBackCenter;
case PA_CHANNEL_POSITION_REAR_LEFT: return SoundIoChannelIdBackLeft;
case PA_CHANNEL_POSITION_REAR_RIGHT: return SoundIoChannelIdBackRight;
case PA_CHANNEL_POSITION_LFE: return SoundIoChannelIdLfe;
case PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER: return SoundIoChannelIdFrontLeftCenter;
case PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER: return SoundIoChannelIdFrontRightCenter;
case PA_CHANNEL_POSITION_SIDE_LEFT: return SoundIoChannelIdSideLeft;
case PA_CHANNEL_POSITION_SIDE_RIGHT: return SoundIoChannelIdSideRight;
case PA_CHANNEL_POSITION_TOP_CENTER: return SoundIoChannelIdTopCenter;
case PA_CHANNEL_POSITION_TOP_FRONT_LEFT: return SoundIoChannelIdTopFrontLeft;
case PA_CHANNEL_POSITION_TOP_FRONT_RIGHT: return SoundIoChannelIdTopFrontRight;
case PA_CHANNEL_POSITION_TOP_FRONT_CENTER: return SoundIoChannelIdTopFrontCenter;
case PA_CHANNEL_POSITION_TOP_REAR_LEFT: return SoundIoChannelIdTopBackLeft;
case PA_CHANNEL_POSITION_TOP_REAR_RIGHT: return SoundIoChannelIdTopBackRight;
case PA_CHANNEL_POSITION_TOP_REAR_CENTER: return SoundIoChannelIdTopBackCenter;
case PA_CHANNEL_POSITION_AUX0: return SoundIoChannelIdAux0;
case PA_CHANNEL_POSITION_AUX1: return SoundIoChannelIdAux1;
case PA_CHANNEL_POSITION_AUX2: return SoundIoChannelIdAux2;
case PA_CHANNEL_POSITION_AUX3: return SoundIoChannelIdAux3;
case PA_CHANNEL_POSITION_AUX4: return SoundIoChannelIdAux4;
case PA_CHANNEL_POSITION_AUX5: return SoundIoChannelIdAux5;
case PA_CHANNEL_POSITION_AUX6: return SoundIoChannelIdAux6;
case PA_CHANNEL_POSITION_AUX7: return SoundIoChannelIdAux7;
case PA_CHANNEL_POSITION_AUX8: return SoundIoChannelIdAux8;
case PA_CHANNEL_POSITION_AUX9: return SoundIoChannelIdAux9;
case PA_CHANNEL_POSITION_AUX10: return SoundIoChannelIdAux10;
case PA_CHANNEL_POSITION_AUX11: return SoundIoChannelIdAux11;
case PA_CHANNEL_POSITION_AUX12: return SoundIoChannelIdAux12;
case PA_CHANNEL_POSITION_AUX13: return SoundIoChannelIdAux13;
case PA_CHANNEL_POSITION_AUX14: return SoundIoChannelIdAux14;
case PA_CHANNEL_POSITION_AUX15: return SoundIoChannelIdAux15;
default: return SoundIoChannelIdInvalid;
}
}
static void set_from_pulseaudio_channel_map(pa_channel_map channel_map, struct SoundIoChannelLayout *channel_layout) {
channel_layout->channel_count = channel_map.channels;
for (int i = 0; i < channel_map.channels; i += 1) {
channel_layout->channels[i] = from_pulseaudio_channel_pos(channel_map.map[i]);
}
channel_layout->name = NULL;
int builtin_layout_count = soundio_channel_layout_builtin_count();
for (int i = 0; i < builtin_layout_count; i += 1) {
const struct SoundIoChannelLayout *builtin_layout = soundio_channel_layout_get_builtin(i);
if (soundio_channel_layout_equal(builtin_layout, channel_layout)) {
channel_layout->name = builtin_layout->name;
break;
}
}
}
static int set_all_device_channel_layouts(struct SoundIoDevice *device) {
device->layout_count = soundio_channel_layout_builtin_count();
device->layouts = ALLOCATE(struct SoundIoChannelLayout, device->layout_count);
if (!device->layouts)
return SoundIoErrorNoMem;
for (int i = 0; i < device->layout_count; i += 1)
device->layouts[i] = *soundio_channel_layout_get_builtin(i);
return 0;
}
static int set_all_device_formats(struct SoundIoDevice *device) {
device->format_count = 9;
device->formats = ALLOCATE(enum SoundIoFormat, device->format_count);
if (!device->formats)
return SoundIoErrorNoMem;
device->formats[0] = SoundIoFormatU8;
device->formats[1] = SoundIoFormatS16LE;
device->formats[2] = SoundIoFormatS16BE;
device->formats[3] = SoundIoFormatFloat32LE;
device->formats[4] = SoundIoFormatFloat32BE;
device->formats[5] = SoundIoFormatS32LE;
device->formats[6] = SoundIoFormatS32BE;
device->formats[7] = SoundIoFormatS24LE;
device->formats[8] = SoundIoFormatS24BE;
return 0;
}
static int perform_operation(struct SoundIoPrivate *si, pa_operation *op) {
if (!op)
return SoundIoErrorNoMem;
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
for (;;) {
switch (pa_operation_get_state(op)) {
case PA_OPERATION_RUNNING:
pa_threaded_mainloop_wait(sipa->main_loop);
continue;
case PA_OPERATION_DONE:
pa_operation_unref(op);
return 0;
case PA_OPERATION_CANCELLED:
pa_operation_unref(op);
return SoundIoErrorInterrupted;
}
}
}
static void sink_info_callback(pa_context *pulse_context, const pa_sink_info *info, int eol, void *userdata) {
struct SoundIoPrivate *si = (struct SoundIoPrivate *)userdata;
struct SoundIo *soundio = &si->pub;
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
int err;
if (eol) {
pa_threaded_mainloop_signal(sipa->main_loop, 0);
return;
}
if (sipa->device_query_err)
return;
struct SoundIoDevicePrivate *dev = ALLOCATE(struct SoundIoDevicePrivate, 1);
if (!dev) {
sipa->device_query_err = SoundIoErrorNoMem;
return;
}
struct SoundIoDevice *device = &dev->pub;
device->ref_count = 1;
device->soundio = soundio;
device->id = strdup(info->name);
device->name = strdup(info->description);
if (!device->id || !device->name) {
soundio_device_unref(device);
sipa->device_query_err = SoundIoErrorNoMem;
return;
}
device->sample_rate_current = info->sample_spec.rate;
// PulseAudio performs resampling, so any value is valid. Let's pick
// some reasonable min and max values.
device->sample_rate_count = 1;
device->sample_rates = &dev->prealloc_sample_rate_range;
device->sample_rates[0].min = soundio_int_min(SOUNDIO_MIN_SAMPLE_RATE, device->sample_rate_current);
device->sample_rates[0].max = soundio_int_max(SOUNDIO_MAX_SAMPLE_RATE, device->sample_rate_current);
device->current_format = from_pulseaudio_format(info->sample_spec);
// PulseAudio performs sample format conversion, so any PulseAudio
// value is valid.
if ((err = set_all_device_formats(device))) {
soundio_device_unref(device);
sipa->device_query_err = SoundIoErrorNoMem;
return;
}
set_from_pulseaudio_channel_map(info->channel_map, &device->current_layout);
// PulseAudio does channel layout remapping, so any channel layout is valid.
if ((err = set_all_device_channel_layouts(device))) {
soundio_device_unref(device);
sipa->device_query_err = SoundIoErrorNoMem;
return;
}
device->aim = SoundIoDeviceAimOutput;
if (SoundIoListDevicePtr_append(&sipa->current_devices_info->output_devices, device)) {
soundio_device_unref(device);
sipa->device_query_err = SoundIoErrorNoMem;
return;
}
}
static void source_info_callback(pa_context *pulse_context, const pa_source_info *info, int eol, void *userdata) {
struct SoundIoPrivate *si = (struct SoundIoPrivate *)userdata;
struct SoundIo *soundio = &si->pub;
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
int err;
if (eol) {
pa_threaded_mainloop_signal(sipa->main_loop, 0);
return;
}
if (sipa->device_query_err)
return;
struct SoundIoDevicePrivate *dev = ALLOCATE(struct SoundIoDevicePrivate, 1);
if (!dev) {
sipa->device_query_err = SoundIoErrorNoMem;
return;
}
struct SoundIoDevice *device = &dev->pub;
device->ref_count = 1;
device->soundio = soundio;
device->id = strdup(info->name);
device->name = strdup(info->description);
if (!device->id || !device->name) {
soundio_device_unref(device);
sipa->device_query_err = SoundIoErrorNoMem;
return;
}
device->sample_rate_current = info->sample_spec.rate;
// PulseAudio performs resampling, so any value is valid. Let's pick
// some reasonable min and max values.
device->sample_rate_count = 1;
device->sample_rates = &dev->prealloc_sample_rate_range;
device->sample_rates[0].min = soundio_int_min(SOUNDIO_MIN_SAMPLE_RATE, device->sample_rate_current);
device->sample_rates[0].max = soundio_int_max(SOUNDIO_MAX_SAMPLE_RATE, device->sample_rate_current);
device->current_format = from_pulseaudio_format(info->sample_spec);
// PulseAudio performs sample format conversion, so any PulseAudio
// value is valid.
if ((err = set_all_device_formats(device))) {
soundio_device_unref(device);
sipa->device_query_err = SoundIoErrorNoMem;
return;
}
set_from_pulseaudio_channel_map(info->channel_map, &device->current_layout);
// PulseAudio does channel layout remapping, so any channel layout is valid.
if ((err = set_all_device_channel_layouts(device))) {
soundio_device_unref(device);
sipa->device_query_err = SoundIoErrorNoMem;
return;
}
device->aim = SoundIoDeviceAimInput;
if (SoundIoListDevicePtr_append(&sipa->current_devices_info->input_devices, device)) {
soundio_device_unref(device);
sipa->device_query_err = SoundIoErrorNoMem;
return;
}
}
static void server_info_callback(pa_context *pulse_context, const pa_server_info *info, void *userdata) {
struct SoundIoPrivate *si = (struct SoundIoPrivate *)userdata;
assert(si);
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
assert(!sipa->default_sink_name);
assert(!sipa->default_source_name);
sipa->default_sink_name = strdup(info->default_sink_name);
sipa->default_source_name = strdup(info->default_source_name);
if (!sipa->default_sink_name || !sipa->default_source_name)
sipa->device_query_err = SoundIoErrorNoMem;
pa_threaded_mainloop_signal(sipa->main_loop, 0);
}
// always called even when refresh_devices succeeds
static void cleanup_refresh_devices(struct SoundIoPrivate *si) {
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
soundio_destroy_devices_info(sipa->current_devices_info);
sipa->current_devices_info = NULL;
free(sipa->default_sink_name);
sipa->default_sink_name = NULL;
free(sipa->default_source_name);
sipa->default_source_name = NULL;
}
// call this while holding the main loop lock
static int refresh_devices(struct SoundIoPrivate *si) {
struct SoundIo *soundio = &si->pub;
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
assert(!sipa->current_devices_info);
sipa->current_devices_info = ALLOCATE(struct SoundIoDevicesInfo, 1);
if (!sipa->current_devices_info)
return SoundIoErrorNoMem;
pa_operation *list_sink_op = pa_context_get_sink_info_list(sipa->pulse_context, sink_info_callback, si);
pa_operation *list_source_op = pa_context_get_source_info_list(sipa->pulse_context, source_info_callback, si);
pa_operation *server_info_op = pa_context_get_server_info(sipa->pulse_context, server_info_callback, si);
int err;
if ((err = perform_operation(si, list_sink_op))) {
return err;
}
if ((err = perform_operation(si, list_source_op))) {
return err;
}
if ((err = perform_operation(si, server_info_op))) {
return err;
}
if (sipa->device_query_err) {
return sipa->device_query_err;
}
// based on the default sink name, figure out the default output index
// if the name doesn't match just pick the first one. if there are no
// devices then we need to set it to -1.
sipa->current_devices_info->default_output_index = -1;
sipa->current_devices_info->default_input_index = -1;
if (sipa->current_devices_info->input_devices.length > 0) {
sipa->current_devices_info->default_input_index = 0;
for (int i = 0; i < sipa->current_devices_info->input_devices.length; i += 1) {
struct SoundIoDevice *device = SoundIoListDevicePtr_val_at(
&sipa->current_devices_info->input_devices, i);
assert(device->aim == SoundIoDeviceAimInput);
if (strcmp(device->id, sipa->default_source_name) == 0) {
sipa->current_devices_info->default_input_index = i;
}
}
}
if (sipa->current_devices_info->output_devices.length > 0) {
sipa->current_devices_info->default_output_index = 0;
for (int i = 0; i < sipa->current_devices_info->output_devices.length; i += 1) {
struct SoundIoDevice *device = SoundIoListDevicePtr_val_at(
&sipa->current_devices_info->output_devices, i);
assert(device->aim == SoundIoDeviceAimOutput);
if (strcmp(device->id, sipa->default_sink_name) == 0) {
sipa->current_devices_info->default_output_index = i;
}
}
}
soundio_destroy_devices_info(sipa->ready_devices_info);
sipa->ready_devices_info = sipa->current_devices_info;
sipa->current_devices_info = NULL;
pa_threaded_mainloop_signal(sipa->main_loop, 0);
soundio->on_events_signal(soundio);
return 0;
}
static void my_flush_events(struct SoundIoPrivate *si, bool wait) {
struct SoundIo *soundio = &si->pub;
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
bool change = false;
bool cb_shutdown = false;
struct SoundIoDevicesInfo *old_devices_info = NULL;
pa_threaded_mainloop_lock(sipa->main_loop);
if (wait)
pa_threaded_mainloop_wait(sipa->main_loop);
if (sipa->device_scan_queued && !sipa->connection_err) {
sipa->device_scan_queued = false;
sipa->connection_err = refresh_devices(si);
cleanup_refresh_devices(si);
}
if (sipa->connection_err && !sipa->emitted_shutdown_cb) {
sipa->emitted_shutdown_cb = true;
cb_shutdown = true;
} else if (sipa->ready_devices_info) {
old_devices_info = si->safe_devices_info;
si->safe_devices_info = sipa->ready_devices_info;
sipa->ready_devices_info = NULL;
change = true;
}
pa_threaded_mainloop_unlock(sipa->main_loop);
if (cb_shutdown)
soundio->on_backend_disconnect(soundio, sipa->connection_err);
else if (change)
soundio->on_devices_change(soundio);
soundio_destroy_devices_info(old_devices_info);
}
static void flush_events_pa(struct SoundIoPrivate *si) {
my_flush_events(si, false);
}
static void wait_events_pa(struct SoundIoPrivate *si) {
my_flush_events(si, false);
my_flush_events(si, true);
}
static void wakeup_pa(struct SoundIoPrivate *si) {
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
pa_threaded_mainloop_lock(sipa->main_loop);
pa_threaded_mainloop_signal(sipa->main_loop, 0);
pa_threaded_mainloop_unlock(sipa->main_loop);
}
static void force_device_scan_pa(struct SoundIoPrivate *si) {
struct SoundIo *soundio = &si->pub;
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
pa_threaded_mainloop_lock(sipa->main_loop);
sipa->device_scan_queued = true;
pa_threaded_mainloop_signal(sipa->main_loop, 0);
soundio->on_events_signal(soundio);
pa_threaded_mainloop_unlock(sipa->main_loop);
}
static pa_sample_format_t to_pulseaudio_format(enum SoundIoFormat format) {
switch (format) {
case SoundIoFormatU8: return PA_SAMPLE_U8;
case SoundIoFormatS16LE: return PA_SAMPLE_S16LE;
case SoundIoFormatS16BE: return PA_SAMPLE_S16BE;
case SoundIoFormatS24LE: return PA_SAMPLE_S24_32LE;
case SoundIoFormatS24BE: return PA_SAMPLE_S24_32BE;
case SoundIoFormatS32LE: return PA_SAMPLE_S32LE;
case SoundIoFormatS32BE: return PA_SAMPLE_S32BE;
case SoundIoFormatFloat32LE: return PA_SAMPLE_FLOAT32LE;
case SoundIoFormatFloat32BE: return PA_SAMPLE_FLOAT32BE;
case SoundIoFormatInvalid:
case SoundIoFormatS8:
case SoundIoFormatU16LE:
case SoundIoFormatU16BE:
case SoundIoFormatU24LE:
case SoundIoFormatU24BE:
case SoundIoFormatU32LE:
case SoundIoFormatU32BE:
case SoundIoFormatFloat64LE:
case SoundIoFormatFloat64BE:
return PA_SAMPLE_INVALID;
}
return PA_SAMPLE_INVALID;
}
static pa_channel_position_t to_pulseaudio_channel_pos(enum SoundIoChannelId channel_id) {
switch (channel_id) {
case SoundIoChannelIdFrontLeft: return PA_CHANNEL_POSITION_FRONT_LEFT;
case SoundIoChannelIdFrontRight: return PA_CHANNEL_POSITION_FRONT_RIGHT;
case SoundIoChannelIdFrontCenter: return PA_CHANNEL_POSITION_FRONT_CENTER;
case SoundIoChannelIdLfe: return PA_CHANNEL_POSITION_LFE;
case SoundIoChannelIdBackLeft: return PA_CHANNEL_POSITION_REAR_LEFT;
case SoundIoChannelIdBackRight: return PA_CHANNEL_POSITION_REAR_RIGHT;
case SoundIoChannelIdFrontLeftCenter: return PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER;
case SoundIoChannelIdFrontRightCenter: return PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER;
case SoundIoChannelIdBackCenter: return PA_CHANNEL_POSITION_REAR_CENTER;
case SoundIoChannelIdSideLeft: return PA_CHANNEL_POSITION_SIDE_LEFT;
case SoundIoChannelIdSideRight: return PA_CHANNEL_POSITION_SIDE_RIGHT;
case SoundIoChannelIdTopCenter: return PA_CHANNEL_POSITION_TOP_CENTER;
case SoundIoChannelIdTopFrontLeft: return PA_CHANNEL_POSITION_TOP_FRONT_LEFT;
case SoundIoChannelIdTopFrontCenter: return PA_CHANNEL_POSITION_TOP_FRONT_CENTER;
case SoundIoChannelIdTopFrontRight: return PA_CHANNEL_POSITION_TOP_FRONT_RIGHT;
case SoundIoChannelIdTopBackLeft: return PA_CHANNEL_POSITION_TOP_REAR_LEFT;
case SoundIoChannelIdTopBackCenter: return PA_CHANNEL_POSITION_TOP_REAR_CENTER;
case SoundIoChannelIdTopBackRight: return PA_CHANNEL_POSITION_TOP_REAR_RIGHT;
case SoundIoChannelIdAux0: return PA_CHANNEL_POSITION_AUX0;
case SoundIoChannelIdAux1: return PA_CHANNEL_POSITION_AUX1;
case SoundIoChannelIdAux2: return PA_CHANNEL_POSITION_AUX2;
case SoundIoChannelIdAux3: return PA_CHANNEL_POSITION_AUX3;
case SoundIoChannelIdAux4: return PA_CHANNEL_POSITION_AUX4;
case SoundIoChannelIdAux5: return PA_CHANNEL_POSITION_AUX5;
case SoundIoChannelIdAux6: return PA_CHANNEL_POSITION_AUX6;
case SoundIoChannelIdAux7: return PA_CHANNEL_POSITION_AUX7;
case SoundIoChannelIdAux8: return PA_CHANNEL_POSITION_AUX8;
case SoundIoChannelIdAux9: return PA_CHANNEL_POSITION_AUX9;
case SoundIoChannelIdAux10: return PA_CHANNEL_POSITION_AUX10;
case SoundIoChannelIdAux11: return PA_CHANNEL_POSITION_AUX11;
case SoundIoChannelIdAux12: return PA_CHANNEL_POSITION_AUX12;
case SoundIoChannelIdAux13: return PA_CHANNEL_POSITION_AUX13;
case SoundIoChannelIdAux14: return PA_CHANNEL_POSITION_AUX14;
case SoundIoChannelIdAux15: return PA_CHANNEL_POSITION_AUX15;
default:
return PA_CHANNEL_POSITION_INVALID;
}
}
static pa_channel_map to_pulseaudio_channel_map(const struct SoundIoChannelLayout *channel_layout) {
pa_channel_map channel_map;
channel_map.channels = channel_layout->channel_count;
assert((unsigned)channel_layout->channel_count <= PA_CHANNELS_MAX);
for (int i = 0; i < channel_layout->channel_count; i += 1)
channel_map.map[i] = to_pulseaudio_channel_pos(channel_layout->channels[i]);
return channel_map;
}
static void playback_stream_state_callback(pa_stream *stream, void *userdata) {
struct SoundIoOutStreamPrivate *os = (struct SoundIoOutStreamPrivate*) userdata;
struct SoundIoOutStream *outstream = &os->pub;
struct SoundIo *soundio = outstream->device->soundio;
struct SoundIoPrivate *si = (struct SoundIoPrivate *)soundio;
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
struct SoundIoOutStreamPulseAudio *ospa = &os->backend_data.pulseaudio;
switch (pa_stream_get_state(stream)) {
case PA_STREAM_UNCONNECTED:
case PA_STREAM_CREATING:
case PA_STREAM_TERMINATED:
break;
case PA_STREAM_READY:
SOUNDIO_ATOMIC_STORE(ospa->stream_ready, true);
pa_threaded_mainloop_signal(sipa->main_loop, 0);
break;
case PA_STREAM_FAILED:
outstream->error_callback(outstream, SoundIoErrorStreaming);
break;
}
}
static void playback_stream_underflow_callback(pa_stream *stream, void *userdata) {
struct SoundIoOutStream *outstream = (struct SoundIoOutStream*)userdata;
outstream->underflow_callback(outstream);
}
static void playback_stream_write_callback(pa_stream *stream, size_t nbytes, void *userdata) {
struct SoundIoOutStreamPrivate *os = (struct SoundIoOutStreamPrivate*)(userdata);
struct SoundIoOutStream *outstream = &os->pub;
int frame_count = nbytes / outstream->bytes_per_frame;
outstream->write_callback(outstream, 0, frame_count);
}
static void outstream_destroy_pa(struct SoundIoPrivate *si, struct SoundIoOutStreamPrivate *os) {
struct SoundIoOutStreamPulseAudio *ospa = &os->backend_data.pulseaudio;
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
pa_stream *stream = ospa->stream;
if (stream) {
pa_threaded_mainloop_lock(sipa->main_loop);
pa_stream_set_write_callback(stream, NULL, NULL);
pa_stream_set_state_callback(stream, NULL, NULL);
pa_stream_set_underflow_callback(stream, NULL, NULL);
pa_stream_set_overflow_callback(stream, NULL, NULL);
pa_stream_disconnect(stream);
pa_stream_unref(stream);
pa_threaded_mainloop_unlock(sipa->main_loop);
ospa->stream = NULL;
}
}
static void timing_update_callback(pa_stream *stream, int success, void *userdata) {
struct SoundIoPrivate *si = (struct SoundIoPrivate *)userdata;
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
pa_threaded_mainloop_signal(sipa->main_loop, 0);
}
static int outstream_open_pa(struct SoundIoPrivate *si, struct SoundIoOutStreamPrivate *os) {
struct SoundIoOutStreamPulseAudio *ospa = &os->backend_data.pulseaudio;
struct SoundIoOutStream *outstream = &os->pub;
if ((unsigned)outstream->layout.channel_count > PA_CHANNELS_MAX)
return SoundIoErrorIncompatibleBackend;
if (!outstream->name)
outstream->name = "SoundIoOutStream";
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
SOUNDIO_ATOMIC_STORE(ospa->stream_ready, false);
SOUNDIO_ATOMIC_FLAG_TEST_AND_SET(ospa->clear_buffer_flag);
assert(sipa->pulse_context);
pa_threaded_mainloop_lock(sipa->main_loop);
pa_sample_spec sample_spec;
sample_spec.format = to_pulseaudio_format(outstream->format);
sample_spec.rate = outstream->sample_rate;
sample_spec.channels = outstream->layout.channel_count;
pa_channel_map channel_map = to_pulseaudio_channel_map(&outstream->layout);
ospa->stream = pa_stream_new(sipa->pulse_context, outstream->name, &sample_spec, &channel_map);
if (!ospa->stream) {
pa_threaded_mainloop_unlock(sipa->main_loop);
outstream_destroy_pa(si, os);
return SoundIoErrorNoMem;
}
pa_stream_set_state_callback(ospa->stream, playback_stream_state_callback, os);
ospa->buffer_attr.maxlength = UINT32_MAX;
ospa->buffer_attr.tlength = UINT32_MAX;
ospa->buffer_attr.prebuf = 0;
ospa->buffer_attr.minreq = UINT32_MAX;
ospa->buffer_attr.fragsize = UINT32_MAX;
int bytes_per_second = outstream->bytes_per_frame * outstream->sample_rate;
if (outstream->software_latency > 0.0) {
int buffer_length = outstream->bytes_per_frame *
ceil_dbl_to_int(outstream->software_latency * bytes_per_second / (double)outstream->bytes_per_frame);
ospa->buffer_attr.maxlength = buffer_length;
ospa->buffer_attr.tlength = buffer_length;
}
pa_stream_flags_t flags = (pa_stream_flags_t)(PA_STREAM_START_CORKED | PA_STREAM_AUTO_TIMING_UPDATE |
PA_STREAM_INTERPOLATE_TIMING | PA_STREAM_ADJUST_LATENCY);
int err = pa_stream_connect_playback(ospa->stream,
outstream->device->id, &ospa->buffer_attr,
flags, NULL, NULL);
if (err) {
pa_threaded_mainloop_unlock(sipa->main_loop);
return SoundIoErrorOpeningDevice;
}
while (!SOUNDIO_ATOMIC_LOAD(ospa->stream_ready))
pa_threaded_mainloop_wait(sipa->main_loop);
pa_operation *update_timing_info_op = pa_stream_update_timing_info(ospa->stream, timing_update_callback, si);
if ((err = perform_operation(si, update_timing_info_op))) {
pa_threaded_mainloop_unlock(sipa->main_loop);
return err;
}
size_t writable_size = pa_stream_writable_size(ospa->stream);
outstream->software_latency = ((double)writable_size) / (double)bytes_per_second;
pa_threaded_mainloop_unlock(sipa->main_loop);
return 0;
}
static int outstream_start_pa(struct SoundIoPrivate *si, struct SoundIoOutStreamPrivate *os) {
struct SoundIoOutStream *outstream = &os->pub;
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
struct SoundIoOutStreamPulseAudio *ospa = &os->backend_data.pulseaudio;
pa_threaded_mainloop_lock(sipa->main_loop);
ospa->write_byte_count = pa_stream_writable_size(ospa->stream);
int frame_count = ospa->write_byte_count / outstream->bytes_per_frame;
outstream->write_callback(outstream, 0, frame_count);
pa_operation *op = pa_stream_cork(ospa->stream, false, NULL, NULL);
if (!op) {
pa_threaded_mainloop_unlock(sipa->main_loop);
return SoundIoErrorStreaming;
}
pa_operation_unref(op);
pa_stream_set_write_callback(ospa->stream, playback_stream_write_callback, os);
pa_stream_set_underflow_callback(ospa->stream, playback_stream_underflow_callback, outstream);
pa_stream_set_overflow_callback(ospa->stream, playback_stream_underflow_callback, outstream);
pa_threaded_mainloop_unlock(sipa->main_loop);
return 0;
}
static int outstream_begin_write_pa(struct SoundIoPrivate *si,
struct SoundIoOutStreamPrivate *os, struct SoundIoChannelArea **out_areas, int *frame_count)
{
struct SoundIoOutStream *outstream = &os->pub;
struct SoundIoOutStreamPulseAudio *ospa = &os->backend_data.pulseaudio;
pa_stream *stream = ospa->stream;
ospa->write_byte_count = *frame_count * outstream->bytes_per_frame;
if (pa_stream_begin_write(stream, (void**)&ospa->write_ptr, &ospa->write_byte_count))
return SoundIoErrorStreaming;
for (int ch = 0; ch < outstream->layout.channel_count; ch += 1) {
ospa->areas[ch].ptr = ospa->write_ptr + outstream->bytes_per_sample * ch;
ospa->areas[ch].step = outstream->bytes_per_frame;
}
*frame_count = ospa->write_byte_count / outstream->bytes_per_frame;
*out_areas = ospa->areas;
return 0;
}
static int outstream_end_write_pa(struct SoundIoPrivate *si, struct SoundIoOutStreamPrivate *os) {
struct SoundIoOutStreamPulseAudio *ospa = &os->backend_data.pulseaudio;
pa_stream *stream = ospa->stream;
pa_seek_mode_t seek_mode = SOUNDIO_ATOMIC_FLAG_TEST_AND_SET(ospa->clear_buffer_flag) ? PA_SEEK_RELATIVE : PA_SEEK_RELATIVE_ON_READ;
if (pa_stream_write(stream, ospa->write_ptr, ospa->write_byte_count, NULL, 0, seek_mode))
return SoundIoErrorStreaming;
return 0;
}
static int outstream_clear_buffer_pa(struct SoundIoPrivate *si,
struct SoundIoOutStreamPrivate *os)
{
struct SoundIoOutStreamPulseAudio *ospa = &os->backend_data.pulseaudio;
SOUNDIO_ATOMIC_FLAG_CLEAR(ospa->clear_buffer_flag);
return 0;
}
static int outstream_pause_pa(struct SoundIoPrivate *si, struct SoundIoOutStreamPrivate *os, bool pause) {
struct SoundIoOutStreamPulseAudio *ospa = &os->backend_data.pulseaudio;
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
if (!pa_threaded_mainloop_in_thread(sipa->main_loop)) {
pa_threaded_mainloop_lock(sipa->main_loop);
}
if (pause != pa_stream_is_corked(ospa->stream)) {
pa_operation *op = pa_stream_cork(ospa->stream, pause, NULL, NULL);
if (!op) {
pa_threaded_mainloop_unlock(sipa->main_loop);
return SoundIoErrorStreaming;
}
pa_operation_unref(op);
}
if (!pa_threaded_mainloop_in_thread(sipa->main_loop)) {
pa_threaded_mainloop_unlock(sipa->main_loop);
}
return 0;
}
static int outstream_get_latency_pa(struct SoundIoPrivate *si, struct SoundIoOutStreamPrivate *os, double *out_latency) {
struct SoundIoOutStreamPulseAudio *ospa = &os->backend_data.pulseaudio;
int err;
pa_usec_t r_usec;
int negative;
if ((err = pa_stream_get_latency(ospa->stream, &r_usec, &negative))) {
return SoundIoErrorStreaming;
}
*out_latency = r_usec / 1000000.0;
return 0;
}
static void recording_stream_state_callback(pa_stream *stream, void *userdata) {
struct SoundIoInStreamPrivate *is = (struct SoundIoInStreamPrivate*)userdata;
struct SoundIoInStreamPulseAudio *ispa = &is->backend_data.pulseaudio;
struct SoundIoInStream *instream = &is->pub;
struct SoundIo *soundio = instream->device->soundio;
struct SoundIoPrivate *si = (struct SoundIoPrivate *)soundio;
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
switch (pa_stream_get_state(stream)) {
case PA_STREAM_UNCONNECTED:
case PA_STREAM_CREATING:
case PA_STREAM_TERMINATED:
break;
case PA_STREAM_READY:
SOUNDIO_ATOMIC_STORE(ispa->stream_ready, true);
pa_threaded_mainloop_signal(sipa->main_loop, 0);
break;
case PA_STREAM_FAILED:
instream->error_callback(instream, SoundIoErrorStreaming);
break;
}
}
static void recording_stream_read_callback(pa_stream *stream, size_t nbytes, void *userdata) {
struct SoundIoInStreamPrivate *is = (struct SoundIoInStreamPrivate*)userdata;
struct SoundIoInStream *instream = &is->pub;
assert(nbytes % instream->bytes_per_frame == 0);
assert(nbytes > 0);
int available_frame_count = nbytes / instream->bytes_per_frame;
instream->read_callback(instream, 0, available_frame_count);
}
static void instream_destroy_pa(struct SoundIoPrivate *si, struct SoundIoInStreamPrivate *is) {
struct SoundIoInStreamPulseAudio *ispa = &is->backend_data.pulseaudio;
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
pa_stream *stream = ispa->stream;
if (stream) {
pa_threaded_mainloop_lock(sipa->main_loop);
pa_stream_set_state_callback(stream, NULL, NULL);
pa_stream_set_read_callback(stream, NULL, NULL);
pa_stream_disconnect(stream);
pa_stream_unref(stream);
pa_threaded_mainloop_unlock(sipa->main_loop);
ispa->stream = NULL;
}
}
static int instream_open_pa(struct SoundIoPrivate *si, struct SoundIoInStreamPrivate *is) {
struct SoundIoInStreamPulseAudio *ispa = &is->backend_data.pulseaudio;
struct SoundIoInStream *instream = &is->pub;
if ((unsigned)instream->layout.channel_count > PA_CHANNELS_MAX)
return SoundIoErrorIncompatibleBackend;
if (!instream->name)
instream->name = "SoundIoInStream";
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
SOUNDIO_ATOMIC_STORE(ispa->stream_ready, false);
pa_threaded_mainloop_lock(sipa->main_loop);
pa_sample_spec sample_spec;
sample_spec.format = to_pulseaudio_format(instream->format);
sample_spec.rate = instream->sample_rate;
sample_spec.channels = instream->layout.channel_count;
pa_channel_map channel_map = to_pulseaudio_channel_map(&instream->layout);
ispa->stream = pa_stream_new(sipa->pulse_context, instream->name, &sample_spec, &channel_map);
if (!ispa->stream) {
pa_threaded_mainloop_unlock(sipa->main_loop);
instream_destroy_pa(si, is);
return SoundIoErrorNoMem;
}
pa_stream *stream = ispa->stream;
pa_stream_set_state_callback(stream, recording_stream_state_callback, is);
pa_stream_set_read_callback(stream, recording_stream_read_callback, is);
ispa->buffer_attr.maxlength = UINT32_MAX;
ispa->buffer_attr.tlength = UINT32_MAX;
ispa->buffer_attr.prebuf = 0;
ispa->buffer_attr.minreq = UINT32_MAX;
ispa->buffer_attr.fragsize = UINT32_MAX;
if (instream->software_latency > 0.0) {
int bytes_per_second = instream->bytes_per_frame * instream->sample_rate;
int buffer_length = instream->bytes_per_frame *
ceil_dbl_to_int(instream->software_latency * bytes_per_second / (double)instream->bytes_per_frame);
ispa->buffer_attr.fragsize = buffer_length;
}
pa_threaded_mainloop_unlock(sipa->main_loop);
return 0;
}
static int instream_start_pa(struct SoundIoPrivate *si, struct SoundIoInStreamPrivate *is) {
struct SoundIoInStream *instream = &is->pub;
struct SoundIoInStreamPulseAudio *ispa = &is->backend_data.pulseaudio;
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
pa_threaded_mainloop_lock(sipa->main_loop);
pa_stream_flags_t flags = (pa_stream_flags_t)(PA_STREAM_AUTO_TIMING_UPDATE | PA_STREAM_INTERPOLATE_TIMING | PA_STREAM_ADJUST_LATENCY);
int err = pa_stream_connect_record(ispa->stream,
instream->device->id,
&ispa->buffer_attr, flags);
if (err) {
pa_threaded_mainloop_unlock(sipa->main_loop);
return SoundIoErrorOpeningDevice;
}
while (!SOUNDIO_ATOMIC_LOAD(ispa->stream_ready))
pa_threaded_mainloop_wait(sipa->main_loop);
pa_operation *update_timing_info_op = pa_stream_update_timing_info(ispa->stream, timing_update_callback, si);
if ((err = perform_operation(si, update_timing_info_op))) {
pa_threaded_mainloop_unlock(sipa->main_loop);
return err;
}
pa_threaded_mainloop_unlock(sipa->main_loop);
return 0;
}
static int instream_begin_read_pa(struct SoundIoPrivate *si,
struct SoundIoInStreamPrivate *is, struct SoundIoChannelArea **out_areas, int *frame_count)
{
struct SoundIoInStream *instream = &is->pub;
struct SoundIoInStreamPulseAudio *ispa = &is->backend_data.pulseaudio;
pa_stream *stream = ispa->stream;
assert(SOUNDIO_ATOMIC_LOAD(ispa->stream_ready));
if (!ispa->peek_buf) {
if (pa_stream_peek(stream, (const void **)&ispa->peek_buf, &ispa->peek_buf_size))
return SoundIoErrorStreaming;
ispa->peek_buf_frames_left = ispa->peek_buf_size / instream->bytes_per_frame;
ispa->peek_buf_index = 0;
// hole
if (!ispa->peek_buf) {
*frame_count = ispa->peek_buf_frames_left;
*out_areas = NULL;
return 0;
}
}
ispa->read_frame_count = soundio_int_min(*frame_count, ispa->peek_buf_frames_left);
*frame_count = ispa->read_frame_count;
for (int ch = 0; ch < instream->layout.channel_count; ch += 1) {
ispa->areas[ch].ptr = ispa->peek_buf + ispa->peek_buf_index + instream->bytes_per_sample * ch;
ispa->areas[ch].step = instream->bytes_per_frame;
}
*out_areas = ispa->areas;
return 0;
}
static int instream_end_read_pa(struct SoundIoPrivate *si, struct SoundIoInStreamPrivate *is) {
struct SoundIoInStream *instream = &is->pub;
struct SoundIoInStreamPulseAudio *ispa = &is->backend_data.pulseaudio;
pa_stream *stream = ispa->stream;
// hole
if (!ispa->peek_buf) {
if (pa_stream_drop(stream))
return SoundIoErrorStreaming;
return 0;
}
size_t advance_bytes = ispa->read_frame_count * instream->bytes_per_frame;
ispa->peek_buf_index += advance_bytes;
ispa->peek_buf_frames_left -= ispa->read_frame_count;
if (ispa->peek_buf_index >= ispa->peek_buf_size) {
if (pa_stream_drop(stream))
return SoundIoErrorStreaming;
ispa->peek_buf = NULL;
}
return 0;
}
static int instream_pause_pa(struct SoundIoPrivate *si, struct SoundIoInStreamPrivate *is, bool pause) {
struct SoundIoInStreamPulseAudio *ispa = &is->backend_data.pulseaudio;
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
if (!pa_threaded_mainloop_in_thread(sipa->main_loop)) {
pa_threaded_mainloop_lock(sipa->main_loop);
}
if (pause != pa_stream_is_corked(ispa->stream)) {
pa_operation *op = pa_stream_cork(ispa->stream, pause, NULL, NULL);
if (!op)
return SoundIoErrorStreaming;
pa_operation_unref(op);
}
if (!pa_threaded_mainloop_in_thread(sipa->main_loop)) {
pa_threaded_mainloop_unlock(sipa->main_loop);
}
return 0;
}
static int instream_get_latency_pa(struct SoundIoPrivate *si, struct SoundIoInStreamPrivate *is, double *out_latency) {
struct SoundIoInStreamPulseAudio *ispa = &is->backend_data.pulseaudio;
int err;
pa_usec_t r_usec;
int negative;
if ((err = pa_stream_get_latency(ispa->stream, &r_usec, &negative))) {
return SoundIoErrorStreaming;
}
*out_latency = r_usec / 1000000.0;
return 0;
}
int soundio_pulseaudio_init(struct SoundIoPrivate *si) {
struct SoundIo *soundio = &si->pub;
struct SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
sipa->device_scan_queued = true;
sipa->main_loop = pa_threaded_mainloop_new();
if (!sipa->main_loop) {
destroy_pa(si);
return SoundIoErrorNoMem;
}
pa_mainloop_api *main_loop_api = pa_threaded_mainloop_get_api(sipa->main_loop);
sipa->props = pa_proplist_new();
if (!sipa->props) {
destroy_pa(si);
return SoundIoErrorNoMem;
}
sipa->pulse_context = pa_context_new_with_proplist(main_loop_api, soundio->app_name, sipa->props);
if (!sipa->pulse_context) {
destroy_pa(si);
return SoundIoErrorNoMem;
}
pa_context_set_subscribe_callback(sipa->pulse_context, subscribe_callback, si);
pa_context_set_state_callback(sipa->pulse_context, context_state_callback, si);
int err = pa_context_connect(sipa->pulse_context, NULL, (pa_context_flags_t)0, NULL);
if (err) {
destroy_pa(si);
return SoundIoErrorInitAudioBackend;
}
if (pa_threaded_mainloop_start(sipa->main_loop)) {
destroy_pa(si);
return SoundIoErrorNoMem;
}
pa_threaded_mainloop_lock(sipa->main_loop);
// block until ready
while (!sipa->ready_flag)
pa_threaded_mainloop_wait(sipa->main_loop);
if (sipa->connection_err) {
pa_threaded_mainloop_unlock(sipa->main_loop);
destroy_pa(si);
return sipa->connection_err;
}
if ((err = subscribe_to_events(si))) {
pa_threaded_mainloop_unlock(sipa->main_loop);
destroy_pa(si);
return err;
}
pa_threaded_mainloop_unlock(sipa->main_loop);
si->destroy = destroy_pa;
si->flush_events = flush_events_pa;
si->wait_events = wait_events_pa;
si->wakeup = wakeup_pa;
si->force_device_scan = force_device_scan_pa;
si->outstream_open = outstream_open_pa;
si->outstream_destroy = outstream_destroy_pa;
si->outstream_start = outstream_start_pa;
si->outstream_begin_write = outstream_begin_write_pa;
si->outstream_end_write = outstream_end_write_pa;
si->outstream_clear_buffer = outstream_clear_buffer_pa;
si->outstream_pause = outstream_pause_pa;
si->outstream_get_latency = outstream_get_latency_pa;
si->instream_open = instream_open_pa;
si->instream_destroy = instream_destroy_pa;
si->instream_start = instream_start_pa;
si->instream_begin_read = instream_begin_read_pa;
si->instream_end_read = instream_end_read_pa;
si->instream_pause = instream_pause_pa;
si->instream_get_latency = instream_get_latency_pa;
return 0;
}
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