SDL_pulseaudio.c
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
/*
The PulseAudio target for SDL 1.3 is based on the 1.3 arts target, with
the appropriate parts replaced with the 1.2 PulseAudio target code. This
was the cleanest way to move it to 1.3. The 1.2 target was written by
Stéphan Kochen: stephan .a.t. kochen.nl
*/
#include "../../SDL_internal.h"
#include "SDL_assert.h"
#if SDL_AUDIO_DRIVER_PULSEAUDIO
/* Allow access to a raw mixing buffer */
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#include <unistd.h>
#include <sys/types.h>
#include <pulse/pulseaudio.h>
#include "SDL_timer.h"
#include "SDL_audio.h"
#include "../SDL_audio_c.h"
#include "SDL_pulseaudio.h"
#include "SDL_loadso.h"
#include "../../thread/SDL_systhread.h"
#if (PA_API_VERSION < 12)
/** Return non-zero if the passed state is one of the connected states */
static SDL_INLINE int PA_CONTEXT_IS_GOOD(pa_context_state_t x) {
return
x == PA_CONTEXT_CONNECTING ||
x == PA_CONTEXT_AUTHORIZING ||
x == PA_CONTEXT_SETTING_NAME ||
x == PA_CONTEXT_READY;
}
/** Return non-zero if the passed state is one of the connected states */
static SDL_INLINE int PA_STREAM_IS_GOOD(pa_stream_state_t x) {
return
x == PA_STREAM_CREATING ||
x == PA_STREAM_READY;
}
#endif /* pulseaudio <= 0.9.10 */
static const char *(*PULSEAUDIO_pa_get_library_version) (void);
static pa_channel_map *(*PULSEAUDIO_pa_channel_map_init_auto) (
pa_channel_map *, unsigned, pa_channel_map_def_t);
static const char * (*PULSEAUDIO_pa_strerror) (int);
static pa_mainloop * (*PULSEAUDIO_pa_mainloop_new) (void);
static pa_mainloop_api * (*PULSEAUDIO_pa_mainloop_get_api) (pa_mainloop *);
static int (*PULSEAUDIO_pa_mainloop_iterate) (pa_mainloop *, int, int *);
static int (*PULSEAUDIO_pa_mainloop_run) (pa_mainloop *, int *);
static void (*PULSEAUDIO_pa_mainloop_quit) (pa_mainloop *, int);
static void (*PULSEAUDIO_pa_mainloop_free) (pa_mainloop *);
static pa_operation_state_t (*PULSEAUDIO_pa_operation_get_state) (
pa_operation *);
static void (*PULSEAUDIO_pa_operation_cancel) (pa_operation *);
static void (*PULSEAUDIO_pa_operation_unref) (pa_operation *);
static pa_context * (*PULSEAUDIO_pa_context_new) (pa_mainloop_api *,
const char *);
static int (*PULSEAUDIO_pa_context_connect) (pa_context *, const char *,
pa_context_flags_t, const pa_spawn_api *);
static pa_operation * (*PULSEAUDIO_pa_context_get_sink_info_list) (pa_context *, pa_sink_info_cb_t, void *);
static pa_operation * (*PULSEAUDIO_pa_context_get_source_info_list) (pa_context *, pa_source_info_cb_t, void *);
static pa_operation * (*PULSEAUDIO_pa_context_get_sink_info_by_index) (pa_context *, uint32_t, pa_sink_info_cb_t, void *);
static pa_operation * (*PULSEAUDIO_pa_context_get_source_info_by_index) (pa_context *, uint32_t, pa_source_info_cb_t, void *);
static pa_context_state_t (*PULSEAUDIO_pa_context_get_state) (pa_context *);
static pa_operation * (*PULSEAUDIO_pa_context_subscribe) (pa_context *, pa_subscription_mask_t, pa_context_success_cb_t, void *);
static void (*PULSEAUDIO_pa_context_set_subscribe_callback) (pa_context *, pa_context_subscribe_cb_t, void *);
static void (*PULSEAUDIO_pa_context_disconnect) (pa_context *);
static void (*PULSEAUDIO_pa_context_unref) (pa_context *);
static pa_stream * (*PULSEAUDIO_pa_stream_new) (pa_context *, const char *,
const pa_sample_spec *, const pa_channel_map *);
static int (*PULSEAUDIO_pa_stream_connect_playback) (pa_stream *, const char *,
const pa_buffer_attr *, pa_stream_flags_t, pa_cvolume *, pa_stream *);
static int (*PULSEAUDIO_pa_stream_connect_record) (pa_stream *, const char *,
const pa_buffer_attr *, pa_stream_flags_t);
static pa_stream_state_t (*PULSEAUDIO_pa_stream_get_state) (pa_stream *);
static size_t (*PULSEAUDIO_pa_stream_writable_size) (pa_stream *);
static size_t (*PULSEAUDIO_pa_stream_readable_size) (pa_stream *);
static int (*PULSEAUDIO_pa_stream_write) (pa_stream *, const void *, size_t,
pa_free_cb_t, int64_t, pa_seek_mode_t);
static pa_operation * (*PULSEAUDIO_pa_stream_drain) (pa_stream *,
pa_stream_success_cb_t, void *);
static int (*PULSEAUDIO_pa_stream_peek) (pa_stream *, const void **, size_t *);
static int (*PULSEAUDIO_pa_stream_drop) (pa_stream *);
static pa_operation * (*PULSEAUDIO_pa_stream_flush) (pa_stream *,
pa_stream_success_cb_t, void *);
static int (*PULSEAUDIO_pa_stream_disconnect) (pa_stream *);
static void (*PULSEAUDIO_pa_stream_unref) (pa_stream *);
static int load_pulseaudio_syms(void);
#ifdef SDL_AUDIO_DRIVER_PULSEAUDIO_DYNAMIC
static const char *pulseaudio_library = SDL_AUDIO_DRIVER_PULSEAUDIO_DYNAMIC;
static void *pulseaudio_handle = NULL;
static int
load_pulseaudio_sym(const char *fn, void **addr)
{
*addr = SDL_LoadFunction(pulseaudio_handle, fn);
if (*addr == NULL) {
/* Don't call SDL_SetError(): SDL_LoadFunction already did. */
return 0;
}
return 1;
}
/* cast funcs to char* first, to please GCC's strict aliasing rules. */
#define SDL_PULSEAUDIO_SYM(x) \
if (!load_pulseaudio_sym(#x, (void **) (char *) &PULSEAUDIO_##x)) return -1
static void
UnloadPulseAudioLibrary(void)
{
if (pulseaudio_handle != NULL) {
SDL_UnloadObject(pulseaudio_handle);
pulseaudio_handle = NULL;
}
}
static int
LoadPulseAudioLibrary(void)
{
int retval = 0;
if (pulseaudio_handle == NULL) {
pulseaudio_handle = SDL_LoadObject(pulseaudio_library);
if (pulseaudio_handle == NULL) {
retval = -1;
/* Don't call SDL_SetError(): SDL_LoadObject already did. */
} else {
retval = load_pulseaudio_syms();
if (retval < 0) {
UnloadPulseAudioLibrary();
}
}
}
return retval;
}
#else
#define SDL_PULSEAUDIO_SYM(x) PULSEAUDIO_##x = x
static void
UnloadPulseAudioLibrary(void)
{
}
static int
LoadPulseAudioLibrary(void)
{
load_pulseaudio_syms();
return 0;
}
#endif /* SDL_AUDIO_DRIVER_PULSEAUDIO_DYNAMIC */
static int
load_pulseaudio_syms(void)
{
SDL_PULSEAUDIO_SYM(pa_get_library_version);
SDL_PULSEAUDIO_SYM(pa_mainloop_new);
SDL_PULSEAUDIO_SYM(pa_mainloop_get_api);
SDL_PULSEAUDIO_SYM(pa_mainloop_iterate);
SDL_PULSEAUDIO_SYM(pa_mainloop_run);
SDL_PULSEAUDIO_SYM(pa_mainloop_quit);
SDL_PULSEAUDIO_SYM(pa_mainloop_free);
SDL_PULSEAUDIO_SYM(pa_operation_get_state);
SDL_PULSEAUDIO_SYM(pa_operation_cancel);
SDL_PULSEAUDIO_SYM(pa_operation_unref);
SDL_PULSEAUDIO_SYM(pa_context_new);
SDL_PULSEAUDIO_SYM(pa_context_connect);
SDL_PULSEAUDIO_SYM(pa_context_get_sink_info_list);
SDL_PULSEAUDIO_SYM(pa_context_get_source_info_list);
SDL_PULSEAUDIO_SYM(pa_context_get_sink_info_by_index);
SDL_PULSEAUDIO_SYM(pa_context_get_source_info_by_index);
SDL_PULSEAUDIO_SYM(pa_context_get_state);
SDL_PULSEAUDIO_SYM(pa_context_subscribe);
SDL_PULSEAUDIO_SYM(pa_context_set_subscribe_callback);
SDL_PULSEAUDIO_SYM(pa_context_disconnect);
SDL_PULSEAUDIO_SYM(pa_context_unref);
SDL_PULSEAUDIO_SYM(pa_stream_new);
SDL_PULSEAUDIO_SYM(pa_stream_connect_playback);
SDL_PULSEAUDIO_SYM(pa_stream_connect_record);
SDL_PULSEAUDIO_SYM(pa_stream_get_state);
SDL_PULSEAUDIO_SYM(pa_stream_writable_size);
SDL_PULSEAUDIO_SYM(pa_stream_readable_size);
SDL_PULSEAUDIO_SYM(pa_stream_write);
SDL_PULSEAUDIO_SYM(pa_stream_drain);
SDL_PULSEAUDIO_SYM(pa_stream_disconnect);
SDL_PULSEAUDIO_SYM(pa_stream_peek);
SDL_PULSEAUDIO_SYM(pa_stream_drop);
SDL_PULSEAUDIO_SYM(pa_stream_flush);
SDL_PULSEAUDIO_SYM(pa_stream_unref);
SDL_PULSEAUDIO_SYM(pa_channel_map_init_auto);
SDL_PULSEAUDIO_SYM(pa_strerror);
return 0;
}
static SDL_INLINE int
squashVersion(const int major, const int minor, const int patch)
{
return ((major & 0xFF) << 16) | ((minor & 0xFF) << 8) | (patch & 0xFF);
}
/* Workaround for older pulse: pa_context_new() must have non-NULL appname */
static const char *
getAppName(void)
{
const char *verstr = PULSEAUDIO_pa_get_library_version();
if (verstr != NULL) {
int maj, min, patch;
if (SDL_sscanf(verstr, "%d.%d.%d", &maj, &min, &patch) == 3) {
if (squashVersion(maj, min, patch) >= squashVersion(0, 9, 15)) {
return NULL; /* 0.9.15+ handles NULL correctly. */
}
}
}
return "SDL Application"; /* oh well. */
}
static void
WaitForPulseOperation(pa_mainloop *mainloop, pa_operation *o)
{
/* This checks for NO errors currently. Either fix that, check results elsewhere, or do things you don't care about. */
if (mainloop && o) {
SDL_bool okay = SDL_TRUE;
while (okay && (PULSEAUDIO_pa_operation_get_state(o) == PA_OPERATION_RUNNING)) {
okay = (PULSEAUDIO_pa_mainloop_iterate(mainloop, 1, NULL) >= 0);
}
PULSEAUDIO_pa_operation_unref(o);
}
}
static void
DisconnectFromPulseServer(pa_mainloop *mainloop, pa_context *context)
{
if (context) {
PULSEAUDIO_pa_context_disconnect(context);
PULSEAUDIO_pa_context_unref(context);
}
if (mainloop != NULL) {
PULSEAUDIO_pa_mainloop_free(mainloop);
}
}
static int
ConnectToPulseServer_Internal(pa_mainloop **_mainloop, pa_context **_context)
{
pa_mainloop *mainloop = NULL;
pa_context *context = NULL;
pa_mainloop_api *mainloop_api = NULL;
int state = 0;
*_mainloop = NULL;
*_context = NULL;
/* Set up a new main loop */
if (!(mainloop = PULSEAUDIO_pa_mainloop_new())) {
return SDL_SetError("pa_mainloop_new() failed");
}
*_mainloop = mainloop;
mainloop_api = PULSEAUDIO_pa_mainloop_get_api(mainloop);
SDL_assert(mainloop_api); /* this never fails, right? */
context = PULSEAUDIO_pa_context_new(mainloop_api, getAppName());
if (!context) {
return SDL_SetError("pa_context_new() failed");
}
*_context = context;
/* Connect to the PulseAudio server */
if (PULSEAUDIO_pa_context_connect(context, NULL, 0, NULL) < 0) {
return SDL_SetError("Could not setup connection to PulseAudio");
}
do {
if (PULSEAUDIO_pa_mainloop_iterate(mainloop, 1, NULL) < 0) {
return SDL_SetError("pa_mainloop_iterate() failed");
}
state = PULSEAUDIO_pa_context_get_state(context);
if (!PA_CONTEXT_IS_GOOD(state)) {
return SDL_SetError("Could not connect to PulseAudio");
}
} while (state != PA_CONTEXT_READY);
return 0; /* connected and ready! */
}
static int
ConnectToPulseServer(pa_mainloop **_mainloop, pa_context **_context)
{
const int retval = ConnectToPulseServer_Internal(_mainloop, _context);
if (retval < 0) {
DisconnectFromPulseServer(*_mainloop, *_context);
}
return retval;
}
/* This function waits until it is possible to write a full sound buffer */
static void
PULSEAUDIO_WaitDevice(_THIS)
{
struct SDL_PrivateAudioData *h = this->hidden;
while (SDL_AtomicGet(&this->enabled)) {
if (PULSEAUDIO_pa_context_get_state(h->context) != PA_CONTEXT_READY ||
PULSEAUDIO_pa_stream_get_state(h->stream) != PA_STREAM_READY ||
PULSEAUDIO_pa_mainloop_iterate(h->mainloop, 1, NULL) < 0) {
SDL_OpenedAudioDeviceDisconnected(this);
return;
}
if (PULSEAUDIO_pa_stream_writable_size(h->stream) >= h->mixlen) {
return;
}
}
}
static void
PULSEAUDIO_PlayDevice(_THIS)
{
/* Write the audio data */
struct SDL_PrivateAudioData *h = this->hidden;
if (SDL_AtomicGet(&this->enabled)) {
if (PULSEAUDIO_pa_stream_write(h->stream, h->mixbuf, h->mixlen, NULL, 0LL, PA_SEEK_RELATIVE) < 0) {
SDL_OpenedAudioDeviceDisconnected(this);
}
}
}
static Uint8 *
PULSEAUDIO_GetDeviceBuf(_THIS)
{
return (this->hidden->mixbuf);
}
static int
PULSEAUDIO_CaptureFromDevice(_THIS, void *buffer, int buflen)
{
struct SDL_PrivateAudioData *h = this->hidden;
const void *data = NULL;
size_t nbytes = 0;
while (SDL_AtomicGet(&this->enabled)) {
if (h->capturebuf != NULL) {
const int cpy = SDL_min(buflen, h->capturelen);
SDL_memcpy(buffer, h->capturebuf, cpy);
/*printf("PULSEAUDIO: fed %d captured bytes\n", cpy);*/
h->capturebuf += cpy;
h->capturelen -= cpy;
if (h->capturelen == 0) {
h->capturebuf = NULL;
PULSEAUDIO_pa_stream_drop(h->stream); /* done with this fragment. */
}
return cpy; /* new data, return it. */
}
if (PULSEAUDIO_pa_context_get_state(h->context) != PA_CONTEXT_READY ||
PULSEAUDIO_pa_stream_get_state(h->stream) != PA_STREAM_READY ||
PULSEAUDIO_pa_mainloop_iterate(h->mainloop, 1, NULL) < 0) {
SDL_OpenedAudioDeviceDisconnected(this);
return -1; /* uhoh, pulse failed! */
}
if (PULSEAUDIO_pa_stream_readable_size(h->stream) == 0) {
continue; /* no data available yet. */
}
/* a new fragment is available! */
PULSEAUDIO_pa_stream_peek(h->stream, &data, &nbytes);
SDL_assert(nbytes > 0);
if (data == NULL) { /* NULL==buffer had a hole. Ignore that. */
PULSEAUDIO_pa_stream_drop(h->stream); /* drop this fragment. */
} else {
/* store this fragment's data, start feeding it to SDL. */
/*printf("PULSEAUDIO: captured %d new bytes\n", (int) nbytes);*/
h->capturebuf = (const Uint8 *) data;
h->capturelen = nbytes;
}
}
return -1; /* not enabled? */
}
static void
PULSEAUDIO_FlushCapture(_THIS)
{
struct SDL_PrivateAudioData *h = this->hidden;
const void *data = NULL;
size_t nbytes = 0;
if (h->capturebuf != NULL) {
PULSEAUDIO_pa_stream_drop(h->stream);
h->capturebuf = NULL;
h->capturelen = 0;
}
while (SDL_TRUE) {
if (PULSEAUDIO_pa_context_get_state(h->context) != PA_CONTEXT_READY ||
PULSEAUDIO_pa_stream_get_state(h->stream) != PA_STREAM_READY ||
PULSEAUDIO_pa_mainloop_iterate(h->mainloop, 1, NULL) < 0) {
SDL_OpenedAudioDeviceDisconnected(this);
return; /* uhoh, pulse failed! */
}
if (PULSEAUDIO_pa_stream_readable_size(h->stream) == 0) {
break; /* no data available, so we're done. */
}
/* a new fragment is available! Just dump it. */
PULSEAUDIO_pa_stream_peek(h->stream, &data, &nbytes);
PULSEAUDIO_pa_stream_drop(h->stream); /* drop this fragment. */
}
}
static void
PULSEAUDIO_CloseDevice(_THIS)
{
if (this->hidden->stream) {
if (this->hidden->capturebuf != NULL) {
PULSEAUDIO_pa_stream_drop(this->hidden->stream);
}
PULSEAUDIO_pa_stream_disconnect(this->hidden->stream);
PULSEAUDIO_pa_stream_unref(this->hidden->stream);
}
DisconnectFromPulseServer(this->hidden->mainloop, this->hidden->context);
SDL_free(this->hidden->mixbuf);
SDL_free(this->hidden->device_name);
SDL_free(this->hidden);
}
static void
SinkDeviceNameCallback(pa_context *c, const pa_sink_info *i, int is_last, void *data)
{
if (i) {
char **devname = (char **) data;
*devname = SDL_strdup(i->name);
}
}
static void
SourceDeviceNameCallback(pa_context *c, const pa_source_info *i, int is_last, void *data)
{
if (i) {
char **devname = (char **) data;
*devname = SDL_strdup(i->name);
}
}
static SDL_bool
FindDeviceName(struct SDL_PrivateAudioData *h, const int iscapture, void *handle)
{
const uint32_t idx = ((uint32_t) ((size_t) handle)) - 1;
if (handle == NULL) { /* NULL == default device. */
return SDL_TRUE;
}
if (iscapture) {
WaitForPulseOperation(h->mainloop,
PULSEAUDIO_pa_context_get_source_info_by_index(h->context, idx,
SourceDeviceNameCallback, &h->device_name));
} else {
WaitForPulseOperation(h->mainloop,
PULSEAUDIO_pa_context_get_sink_info_by_index(h->context, idx,
SinkDeviceNameCallback, &h->device_name));
}
return (h->device_name != NULL);
}
static int
PULSEAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
{
struct SDL_PrivateAudioData *h = NULL;
Uint16 test_format = 0;
pa_sample_spec paspec;
pa_buffer_attr paattr;
pa_channel_map pacmap;
pa_stream_flags_t flags = 0;
int state = 0;
int rc = 0;
/* Initialize all variables that we clean on shutdown */
h = this->hidden = (struct SDL_PrivateAudioData *)
SDL_malloc((sizeof *this->hidden));
if (this->hidden == NULL) {
return SDL_OutOfMemory();
}
SDL_zerop(this->hidden);
paspec.format = PA_SAMPLE_INVALID;
/* Try for a closest match on audio format */
for (test_format = SDL_FirstAudioFormat(this->spec.format);
(paspec.format == PA_SAMPLE_INVALID) && test_format;) {
#ifdef DEBUG_AUDIO
fprintf(stderr, "Trying format 0x%4.4x\n", test_format);
#endif
switch (test_format) {
case AUDIO_U8:
paspec.format = PA_SAMPLE_U8;
break;
case AUDIO_S16LSB:
paspec.format = PA_SAMPLE_S16LE;
break;
case AUDIO_S16MSB:
paspec.format = PA_SAMPLE_S16BE;
break;
case AUDIO_S32LSB:
paspec.format = PA_SAMPLE_S32LE;
break;
case AUDIO_S32MSB:
paspec.format = PA_SAMPLE_S32BE;
break;
case AUDIO_F32LSB:
paspec.format = PA_SAMPLE_FLOAT32LE;
break;
case AUDIO_F32MSB:
paspec.format = PA_SAMPLE_FLOAT32BE;
break;
default:
paspec.format = PA_SAMPLE_INVALID;
break;
}
if (paspec.format == PA_SAMPLE_INVALID) {
test_format = SDL_NextAudioFormat();
}
}
if (paspec.format == PA_SAMPLE_INVALID) {
return SDL_SetError("Couldn't find any hardware audio formats");
}
this->spec.format = test_format;
/* Calculate the final parameters for this audio specification */
#ifdef PA_STREAM_ADJUST_LATENCY
this->spec.samples /= 2; /* Mix in smaller chunck to avoid underruns */
#endif
SDL_CalculateAudioSpec(&this->spec);
/* Allocate mixing buffer */
if (!iscapture) {
h->mixlen = this->spec.size;
h->mixbuf = (Uint8 *) SDL_malloc(h->mixlen);
if (h->mixbuf == NULL) {
return SDL_OutOfMemory();
}
SDL_memset(h->mixbuf, this->spec.silence, this->spec.size);
}
paspec.channels = this->spec.channels;
paspec.rate = this->spec.freq;
/* Reduced prebuffering compared to the defaults. */
#ifdef PA_STREAM_ADJUST_LATENCY
/* 2x original requested bufsize */
paattr.tlength = h->mixlen * 4;
paattr.prebuf = -1;
paattr.maxlength = -1;
/* -1 can lead to pa_stream_writable_size() >= mixlen never being true */
paattr.minreq = h->mixlen;
flags = PA_STREAM_ADJUST_LATENCY;
#else
paattr.tlength = h->mixlen*2;
paattr.prebuf = h->mixlen*2;
paattr.maxlength = h->mixlen*2;
paattr.minreq = h->mixlen;
#endif
if (ConnectToPulseServer(&h->mainloop, &h->context) < 0) {
return SDL_SetError("Could not connect to PulseAudio server");
}
if (!FindDeviceName(h, iscapture, handle)) {
return SDL_SetError("Requested PulseAudio sink/source missing?");
}
/* The SDL ALSA output hints us that we use Windows' channel mapping */
/* http://bugzilla.libsdl.org/show_bug.cgi?id=110 */
PULSEAUDIO_pa_channel_map_init_auto(&pacmap, this->spec.channels,
PA_CHANNEL_MAP_WAVEEX);
h->stream = PULSEAUDIO_pa_stream_new(
h->context,
"Simple DirectMedia Layer", /* stream description */
&paspec, /* sample format spec */
&pacmap /* channel map */
);
if (h->stream == NULL) {
return SDL_SetError("Could not set up PulseAudio stream");
}
/* now that we have multi-device support, don't move a stream from
a device that was unplugged to something else, unless we're default. */
if (h->device_name != NULL) {
flags |= PA_STREAM_DONT_MOVE;
}
if (iscapture) {
rc = PULSEAUDIO_pa_stream_connect_record(h->stream, h->device_name, &paattr, flags);
} else {
rc = PULSEAUDIO_pa_stream_connect_playback(h->stream, h->device_name, &paattr, flags, NULL, NULL);
}
if (rc < 0) {
return SDL_SetError("Could not connect PulseAudio stream");
}
do {
if (PULSEAUDIO_pa_mainloop_iterate(h->mainloop, 1, NULL) < 0) {
return SDL_SetError("pa_mainloop_iterate() failed");
}
state = PULSEAUDIO_pa_stream_get_state(h->stream);
if (!PA_STREAM_IS_GOOD(state)) {
return SDL_SetError("Could not connect PulseAudio stream");
}
} while (state != PA_STREAM_READY);
/* We're ready to rock and roll. :-) */
return 0;
}
static pa_mainloop *hotplug_mainloop = NULL;
static pa_context *hotplug_context = NULL;
static SDL_Thread *hotplug_thread = NULL;
/* device handles are device index + 1, cast to void*, so we never pass a NULL. */
/* This is called when PulseAudio adds an output ("sink") device. */
static void
SinkInfoCallback(pa_context *c, const pa_sink_info *i, int is_last, void *data)
{
if (i) {
SDL_AddAudioDevice(SDL_FALSE, i->description, (void *) ((size_t) i->index+1));
}
}
/* This is called when PulseAudio adds a capture ("source") device. */
static void
SourceInfoCallback(pa_context *c, const pa_source_info *i, int is_last, void *data)
{
if (i) {
/* Skip "monitor" sources. These are just output from other sinks. */
if (i->monitor_of_sink == PA_INVALID_INDEX) {
SDL_AddAudioDevice(SDL_TRUE, i->description, (void *) ((size_t) i->index+1));
}
}
}
/* This is called when PulseAudio has a device connected/removed/changed. */
static void
HotplugCallback(pa_context *c, pa_subscription_event_type_t t, uint32_t idx, void *data)
{
const SDL_bool added = ((t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) == PA_SUBSCRIPTION_EVENT_NEW);
const SDL_bool removed = ((t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) == PA_SUBSCRIPTION_EVENT_REMOVE);
if (added || removed) { /* we only care about add/remove events. */
const SDL_bool sink = ((t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) == PA_SUBSCRIPTION_EVENT_SINK);
const SDL_bool source = ((t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) == PA_SUBSCRIPTION_EVENT_SOURCE);
/* adds need sink details from the PulseAudio server. Another callback... */
if (added && sink) {
PULSEAUDIO_pa_context_get_sink_info_by_index(hotplug_context, idx, SinkInfoCallback, NULL);
} else if (added && source) {
PULSEAUDIO_pa_context_get_source_info_by_index(hotplug_context, idx, SourceInfoCallback, NULL);
} else if (removed && (sink || source)) {
/* removes we can handle just with the device index. */
SDL_RemoveAudioDevice(source != 0, (void *) ((size_t) idx+1));
}
}
}
/* this runs as a thread while the Pulse target is initialized to catch hotplug events. */
static int SDLCALL
HotplugThread(void *data)
{
pa_operation *o;
SDL_SetThreadPriority(SDL_THREAD_PRIORITY_LOW);
PULSEAUDIO_pa_context_set_subscribe_callback(hotplug_context, HotplugCallback, NULL);
o = PULSEAUDIO_pa_context_subscribe(hotplug_context, PA_SUBSCRIPTION_MASK_SINK | PA_SUBSCRIPTION_MASK_SOURCE, NULL, NULL);
PULSEAUDIO_pa_operation_unref(o); /* don't wait for it, just do our thing. */
PULSEAUDIO_pa_mainloop_run(hotplug_mainloop, NULL);
return 0;
}
static void
PULSEAUDIO_DetectDevices()
{
WaitForPulseOperation(hotplug_mainloop, PULSEAUDIO_pa_context_get_sink_info_list(hotplug_context, SinkInfoCallback, NULL));
WaitForPulseOperation(hotplug_mainloop, PULSEAUDIO_pa_context_get_source_info_list(hotplug_context, SourceInfoCallback, NULL));
/* ok, we have a sane list, let's set up hotplug notifications now... */
hotplug_thread = SDL_CreateThreadInternal(HotplugThread, "PulseHotplug", 256 * 1024, NULL);
}
static void
PULSEAUDIO_Deinitialize(void)
{
if (hotplug_thread) {
PULSEAUDIO_pa_mainloop_quit(hotplug_mainloop, 0);
SDL_WaitThread(hotplug_thread, NULL);
hotplug_thread = NULL;
}
DisconnectFromPulseServer(hotplug_mainloop, hotplug_context);
hotplug_mainloop = NULL;
hotplug_context = NULL;
UnloadPulseAudioLibrary();
}
static int
PULSEAUDIO_Init(SDL_AudioDriverImpl * impl)
{
if (LoadPulseAudioLibrary() < 0) {
return 0;
}
if (ConnectToPulseServer(&hotplug_mainloop, &hotplug_context) < 0) {
UnloadPulseAudioLibrary();
return 0;
}
/* Set the function pointers */
impl->DetectDevices = PULSEAUDIO_DetectDevices;
impl->OpenDevice = PULSEAUDIO_OpenDevice;
impl->PlayDevice = PULSEAUDIO_PlayDevice;
impl->WaitDevice = PULSEAUDIO_WaitDevice;
impl->GetDeviceBuf = PULSEAUDIO_GetDeviceBuf;
impl->CloseDevice = PULSEAUDIO_CloseDevice;
impl->Deinitialize = PULSEAUDIO_Deinitialize;
impl->CaptureFromDevice = PULSEAUDIO_CaptureFromDevice;
impl->FlushCapture = PULSEAUDIO_FlushCapture;
impl->HasCaptureSupport = SDL_TRUE;
return 1; /* this audio target is available. */
}
AudioBootStrap PULSEAUDIO_bootstrap = {
"pulseaudio", "PulseAudio", PULSEAUDIO_Init, 0
};
#endif /* SDL_AUDIO_DRIVER_PULSEAUDIO */
/* vi: set ts=4 sw=4 expandtab: */
SDL_PrivateAudioData::mixlen
int mixlen
Definition: SDL_alsa_audio.h:40
SDL_PrivateAudioData::stream
arts_stream_t stream
Definition: SDL_artsaudio.h:36
SDL_PrivateAudioData::device_name
char * device_name
Definition: SDL_pulseaudio.h:35
sink
GLsizei GLenum GLboolean sink
Definition: SDL_opengl_glext.h:3146
SDL_PrivateAudioData::capturelen
int capturelen
Definition: SDL_pulseaudio.h:47
SDL_min
#define SDL_min(x, y)
Definition: SDL_stdinc.h:406
SDL_FirstAudioFormat
SDL_AudioFormat SDL_FirstAudioFormat(SDL_AudioFormat format)
Definition: SDL_audio.c:1584
AUDIO_S32MSB
#define AUDIO_S32MSB
Definition: SDL_audio.h:104
SDL_PrivateAudioData::iscapture
SDL_bool iscapture
Definition: SDL_qsa_audio.h:37
SDL_TRUE
Definition: SDL_stdinc.h:142
SDL_AudioDriverImpl::DetectDevices
void(* DetectDevices)(void)
Definition: SDL_sysaudio.h:67
x
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1574
SDL_PrivateAudioData::capturebuf
LPDIRECTSOUNDCAPTUREBUFFER capturebuf
Definition: SDL_directsound.h:39
SDL_FALSE
Definition: SDL_stdinc.h:141
h
GLfloat GLfloat GLfloat GLfloat h
Definition: SDL_opengl_glext.h:1946
state
struct xkb_state * state
Definition: SDL_waylandsym.h:113
SDL_AudioDriverImpl::HasCaptureSupport
int HasCaptureSupport
Definition: SDL_sysaudio.h:91
context
static screen_context_t context
Definition: video.c:25
SDL_AudioDriverImpl::PlayDevice
void(* PlayDevice)(_THIS)
Definition: SDL_sysaudio.h:73
SDL_AudioSpec::samples
Uint16 samples
Definition: SDL_audio.h:183
SDL_AudioDriverImpl::WaitDevice
void(* WaitDevice)(_THIS)
Definition: SDL_sysaudio.h:72
SDL_OpenedAudioDeviceDisconnected
void SDL_OpenedAudioDeviceDisconnected(SDL_AudioDevice *device)
Definition: SDL_audio.c:449
data
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
SDL_LoadObject
#define SDL_LoadObject
Definition: SDL_dynapi_overrides.h:232
SDL_UnloadObject
#define SDL_UnloadObject
Definition: SDL_dynapi_overrides.h:234
SDL_zerop
#define SDL_zerop(x)
Definition: SDL_stdinc.h:417
SDL_PrivateAudioData
Definition: SDL_alsa_audio.h:33
SDL_NextAudioFormat
SDL_AudioFormat SDL_NextAudioFormat(void)
Definition: SDL_audio.c:1596
SDL_PrivateAudioData::context
pa_context * context
Definition: SDL_pulseaudio.h:39
AUDIO_F32MSB
#define AUDIO_F32MSB
Definition: SDL_audio.h:113
spec
SDL_AudioSpec spec
Definition: loopwave.c:31
size_t
unsigned int size_t
Definition: SDL_config_windows.h:68
retval
SDL_bool retval
Definition: testgamecontroller.c:65
AUDIO_U8
#define AUDIO_U8
Definition: SDL_audio.h:89
SDL_memcpy
#define SDL_memcpy
Definition: SDL_dynapi_overrides.h:387
SDL_CreateThreadInternal
SDL_Thread * SDL_CreateThreadInternal(int(*fn)(void *), const char *name, const size_t stacksize, void *data)
Definition: SDL_thread.c:427
AudioBootStrap
Definition: SDL_sysaudio.h:175
SDL_AudioSpec::freq
int freq
Definition: SDL_audio.h:179
handle
EGLImageKHR EGLint EGLint * handle
Definition: eglext.h:937
SDL_RemoveAudioDevice
void SDL_RemoveAudioDevice(const int iscapture, void *handle)
Definition: SDL_audio.c:490
SDL_AudioSpec::channels
Uint8 channels
Definition: SDL_audio.h:181
_THIS
#define _THIS
Definition: SDL_alsa_audio.h:31
Uint8
uint8_t Uint8
Definition: SDL_stdinc.h:157
SDL_free
#define SDL_free
Definition: SDL_dynapi_overrides.h:377
addr
GLenum const void * addr
Definition: SDL_opengl_glext.h:7945
AUDIO_F32LSB
#define AUDIO_F32LSB
Definition: SDL_audio.h:112
SDL_AudioDriverImpl
Definition: SDL_sysaudio.h:65
c
const GLubyte * c
Definition: SDL_opengl_glext.h:11093
SDL_AudioDriverImpl::Deinitialize
void(* Deinitialize)(void)
Definition: SDL_sysaudio.h:83
source
GLsizei GLsizei GLchar * source
Definition: SDL_opengl_glext.h:677
AUDIO_S32LSB
#define AUDIO_S32LSB
Definition: SDL_audio.h:103
SDL_sscanf
#define SDL_sscanf
Definition: SDL_dynapi_overrides.h:39
SDL_CalculateAudioSpec
void SDL_CalculateAudioSpec(SDL_AudioSpec *spec)
Definition: SDL_audio.c:1605
SDL_THREAD_PRIORITY_LOW
Definition: SDL_thread.h:60
enabled
GLenum GLenum GLsizei const GLuint GLboolean enabled
Definition: SDL_opengl_glext.h:2479
i
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:50
SDL_AudioSpec::size
Uint32 size
Definition: SDL_audio.h:185
SDL_assert
#define SDL_assert(condition)
Definition: SDL_assert.h:169
SDL_AudioDriverImpl::OpenDevice
int(* OpenDevice)(_THIS, void *handle, const char *devname, int iscapture)
Definition: SDL_sysaudio.h:68
NULL
#define NULL
Definition: begin_code.h:164
SDL_OutOfMemory
#define SDL_OutOfMemory()
Definition: SDL_error.h:52
SDL_bool
SDL_bool
Definition: SDL_stdinc.h:139
buffer
GLuint buffer
Definition: SDL_opengl_glext.h:533
SDL_AudioDriverImpl::CaptureFromDevice
int(* CaptureFromDevice)(_THIS, void *buffer, int buflen)
Definition: SDL_sysaudio.h:76
uint32_t
unsigned int uint32_t
Definition: SDL_config_windows.h:63
SDL_SetError
#define SDL_SetError
Definition: SDL_dynapi_overrides.h:30
SDL_loadso.h
flags
GLbitfield flags
Definition: SDL_opengl_glext.h:1480
SDL_AudioDriverImpl::CloseDevice
void(* CloseDevice)(_THIS)
Definition: SDL_sysaudio.h:79
AUDIO_S16MSB
#define AUDIO_S16MSB
Definition: SDL_audio.h:94
SDL_audio.h
SDL_strdup
#define SDL_strdup
Definition: SDL_dynapi_overrides.h:397
SDL_AudioSpec::format
SDL_AudioFormat format
Definition: SDL_audio.h:180
SDL_AudioDriverImpl::FlushCapture
void(* FlushCapture)(_THIS)
Definition: SDL_sysaudio.h:77
void
SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char const char SDL_SCANF_FORMAT_STRING const char return SDL_ThreadFunction const char void return Uint32 return Uint32 void
Definition: SDL_dynapi_procs.h:89
AUDIO_S16LSB
#define AUDIO_S16LSB
Definition: SDL_audio.h:92
SDL_AudioDriverImpl::GetDeviceBuf
Uint8 *(* GetDeviceBuf)(_THIS)
Definition: SDL_sysaudio.h:75
SDL_AtomicGet
#define SDL_AtomicGet
Definition: SDL_dynapi_overrides.h:68
Uint16
uint16_t Uint16
Definition: SDL_stdinc.h:169
SDL_Thread
Definition: SDL_thread_c.h:54
SDL_INLINE
#define SDL_INLINE
Definition: begin_code.h:131
SDL_malloc
#define SDL_malloc
Definition: SDL_dynapi_overrides.h:374
PULSEAUDIO_bootstrap
AudioBootStrap PULSEAUDIO_bootstrap
SDL_PrivateAudioData::mixbuf
Uint8 * mixbuf
Definition: SDL_alsa_audio.h:39
SDL_LoadFunction
void * SDL_LoadFunction(void *handle, const char *name)
SDL_timer.h
SDL_PrivateAudioData::mainloop
pa_mainloop * mainloop
Definition: SDL_pulseaudio.h:38
SDLCALL
#define SDLCALL
Definition: SDL_internal.h:45
SDL_SetThreadPriority
#define SDL_SetThreadPriority
Definition: SDL_dynapi_overrides.h:477
t
GLdouble GLdouble t
Definition: SDL_opengl.h:2071
SDL_memset
#define SDL_memset
Definition: SDL_dynapi_overrides.h:386
SDL_assert.h
SDL_pulseaudio.h
int64_t
signed long long int64_t
Definition: SDL_config_windows.h:64
SDL_WaitThread
#define SDL_WaitThread
Definition: SDL_dynapi_overrides.h:478
SDL_AddAudioDevice
void SDL_AddAudioDevice(const int iscapture, const char *name, void *handle)
Definition: SDL_audio.c:432