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sndio: Updated to the SDL3 audio API.

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Ryan C. Gordon 2023-07-06 16:52:20 -04:00
parent 1a55282051
commit fb395d3ad7
No known key found for this signature in database
GPG Key ID: FA148B892AB48044
3 changed files with 104 additions and 117 deletions
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2
CMakeLists.txt
View File

@ -353,8 +353,6 @@ set_option(SDL_CLANG_TIDY "Run clang-tidy static analysis" OFF)
set(SDL_VENDOR_INFO "" CACHE STRING "Vendor name and/or version to add to SDL_REVISION")
set(SDL_SNDIO OFF)
cmake_dependent_option(SDL_SHARED "Build a shared version of the library" ${SDL_SHARED_DEFAULT} ${SDL_SHARED_AVAILABLE} OFF)
option(SDL_STATIC "Build a static version of the library" ${SDL_STATIC_DEFAULT})
option(SDL_TEST_LIBRARY "Build the SDL3_test library" ON)

207
src/audio/sndio/SDL_sndioaudio.c
View File

@ -23,7 +23,7 @@
#ifdef SDL_AUDIO_DRIVER_SNDIO
/* OpenBSD sndio target */
// OpenBSD sndio target
#ifdef HAVE_STDIO_H
#include <stdio.h>
@ -72,14 +72,13 @@ static int load_sndio_sym(const char *fn, void **addr)
{
*addr = SDL_LoadFunction(sndio_handle, fn);
if (*addr == NULL) {
/* Don't call SDL_SetError(): SDL_LoadFunction already did. */
return 0;
return 0; // Don't call SDL_SetError(): SDL_LoadFunction already did.
}
return 1;
}
/* cast funcs to char* first, to please GCC's strict aliasing rules. */
// cast funcs to char* first, to please GCC's strict aliasing rules.
#define SDL_SNDIO_SYM(x) \
if (!load_sndio_sym(#x, (void **)(char *)&SNDIO_##x)) \
return -1
@ -123,8 +122,7 @@ static int LoadSNDIOLibrary(void)
if (sndio_handle == NULL) {
sndio_handle = SDL_LoadObject(sndio_library);
if (sndio_handle == NULL) {
retval = -1;
/* Don't call SDL_SetError(): SDL_LoadObject already did. */
retval = -1; // Don't call SDL_SetError(): SDL_LoadObject already did.
} else {
retval = load_sndio_syms();
if (retval < 0) {
@ -147,129 +145,128 @@ static int LoadSNDIOLibrary(void)
return 0;
}
#endif /* SDL_AUDIO_DRIVER_SNDIO_DYNAMIC */
#endif // SDL_AUDIO_DRIVER_SNDIO_DYNAMIC
static void SNDIO_WaitDevice(SDL_AudioDevice *_this)
static void SNDIO_WaitDevice(SDL_AudioDevice *device)
{
/* no-op; SNDIO_sio_write() blocks if necessary. */
const SDL_bool iscapture = device->iscapture;
while (!SDL_AtomicGet(&device->shutdown)) {
if (SNDIO_sio_eof(device->hidden->dev)) {
SDL_AudioDeviceDisconnected(device);
return;
}
const int nfds = SNDIO_sio_pollfd(device->hidden->dev, device->hidden->pfd, iscapture ? POLLIN : POLLOUT);
if (nfds <= 0 || poll(device->hidden->pfd, nfds, 10) < 0) {
SDL_AudioDeviceDisconnected(device);
return;
}
const int revents = SNDIO_sio_revents(device->hidden->dev, device->hidden->pfd);
if (iscapture && (revents & POLLIN)) {
return;
} else if (!iscapture && (revents & POLLOUT)) {
return;
} else if (revents & POLLHUP) {
SDL_AudioDeviceDisconnected(device);
return;
}
}
}
static void SNDIO_PlayDevice(SDL_AudioDevice *_this)
static void SNDIO_PlayDevice(SDL_AudioDevice *device, const Uint8 *buffer, int buflen)
{
const int written = SNDIO_sio_write(_this->hidden->dev,
_this->hidden->mixbuf,
_this->hidden->mixlen);
/* If we couldn't write, assume fatal error for now */
if (written == 0) {
SDL_OpenedAudioDeviceDisconnected(_this);
// !!! FIXME: this should be non-blocking so we can check device->shutdown.
// this is set to blocking, because we _have_ to send the entire buffer down, but hopefully WaitDevice took most of the delay time.
if (SNDIO_sio_write(device->hidden->dev, buffer, buflen) != buflen) {
SDL_AudioDeviceDisconnected(device); // If we couldn't write, assume fatal error for now
}
#ifdef DEBUG_AUDIO
fprintf(stderr, "Wrote %d bytes of audio data\n", written);
#endif
}
static int SNDIO_CaptureFromDevice(SDL_AudioDevice *_this, void *buffer, int buflen)
static int SNDIO_CaptureFromDevice(SDL_AudioDevice *device, void *buffer, int buflen)
{
size_t r;
int revents;
int nfds;
/* Emulate a blocking read */
r = SNDIO_sio_read(_this->hidden->dev, buffer, buflen);
while (r == 0 && !SNDIO_sio_eof(_this->hidden->dev)) {
nfds = SNDIO_sio_pollfd(_this->hidden->dev, _this->hidden->pfd, POLLIN);
if (nfds <= 0 || poll(_this->hidden->pfd, nfds, INFTIM) < 0) {
return -1;
}
revents = SNDIO_sio_revents(_this->hidden->dev, _this->hidden->pfd);
if (revents & POLLIN) {
r = SNDIO_sio_read(_this->hidden->dev, buffer, buflen);
}
if (revents & POLLHUP) {
break;
}
// We set capture devices non-blocking; this can safely return 0 in SDL3, but we'll check for EOF to cause a device disconnect.
const size_t br = SNDIO_sio_read(device->hidden->dev, buffer, buflen);
if ((br == 0) && SNDIO_sio_eof(device->hidden->dev)) {
return -1;
}
return (int)r;
return (int) br;
}
static void SNDIO_FlushCapture(SDL_AudioDevice *_this)
static void SNDIO_FlushCapture(SDL_AudioDevice *device)
{
char buf[512];
while (SNDIO_sio_read(_this->hidden->dev, buf, sizeof(buf)) != 0) {
/* do nothing */;
while (!SDL_AtomicGet(&device->shutdown) && (SNDIO_sio_read(device->hidden->dev, buf, sizeof(buf)) > 0)) {
// do nothing
}
}
static Uint8 *SNDIO_GetDeviceBuf(SDL_AudioDevice *_this)
static Uint8 *SNDIO_GetDeviceBuf(SDL_AudioDevice *device, int *buffer_size)
{
return _this->hidden->mixbuf;
return device->hidden->mixbuf;
}
static void SNDIO_CloseDevice(SDL_AudioDevice *_this)
static void SNDIO_CloseDevice(SDL_AudioDevice *device)
{
if (_this->hidden->pfd != NULL) {
SDL_free(_this->hidden->pfd);
if (device->hidden) {
if (device->hidden->dev != NULL) {
SNDIO_sio_stop(device->hidden->dev);
SNDIO_sio_close(device->hidden->dev);
}
SDL_free(device->hidden->pfd);
SDL_free(device->hidden->mixbuf);
SDL_free(device->hidden);
device->hidden = NULL;
}
if (_this->hidden->dev != NULL) {
SNDIO_sio_stop(_this->hidden->dev);
SNDIO_sio_close(_this->hidden->dev);
}
SDL_free(_this->hidden->mixbuf);
SDL_free(_this->hidden);
}
static int SNDIO_OpenDevice(SDL_AudioDevice *_this, const char *devname)
static int SNDIO_OpenDevice(SDL_AudioDevice *device)
{
SDL_AudioFormat test_format;
const SDL_AudioFormat *closefmts;
struct sio_par par;
SDL_bool iscapture = _this->iscapture;
_this->hidden = (struct SDL_PrivateAudioData *)
SDL_malloc(sizeof(*_this->hidden));
if (_this->hidden == NULL) {
device->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, sizeof(*device->hidden));
if (device->hidden == NULL) {
return SDL_OutOfMemory();
}
SDL_zerop(_this->hidden);
_this->hidden->mixlen = _this->spec.size;
// !!! FIXME: we really should standardize this on a specific SDL hint.
const char *audiodev = SDL_getenv("AUDIODEV");
/* Capture devices must be non-blocking for SNDIO_FlushCapture */
_this->hidden->dev = SNDIO_sio_open(devname != NULL ? devname : SIO_DEVANY,
iscapture ? SIO_REC : SIO_PLAY, iscapture);
if (_this->hidden->dev == NULL) {
// Capture devices must be non-blocking for SNDIO_FlushCapture
device->hidden->dev = SNDIO_sio_open(audiodev != NULL ? audiodev : SIO_DEVANY,
device->iscapture ? SIO_REC : SIO_PLAY, device->iscapture);
if (device->hidden->dev == NULL) {
return SDL_SetError("sio_open() failed");
}
/* Allocate the pollfd array for capture devices */
if (iscapture) {
_this->hidden->pfd = SDL_malloc(sizeof(struct pollfd) * SNDIO_sio_nfds(_this->hidden->dev));
if (_this->hidden->pfd == NULL) {
return SDL_OutOfMemory();
}
device->hidden->pfd = SDL_malloc(sizeof(struct pollfd) * SNDIO_sio_nfds(device->hidden->dev));
if (device->hidden->pfd == NULL) {
return SDL_OutOfMemory();
}
struct sio_par par;
SNDIO_sio_initpar(&par);
par.rate = _this->spec.freq;
par.pchan = _this->spec.channels;
par.round = _this->spec.samples;
par.rate = device->spec.freq;
par.pchan = device->spec.channels;
par.round = device->sample_frames;
par.appbufsz = par.round * 2;
/* Try for a closest match on audio format */
closefmts = SDL_ClosestAudioFormats(_this->spec.format);
// Try for a closest match on audio format
SDL_AudioFormat test_format;
const SDL_AudioFormat *closefmts = SDL_ClosestAudioFormats(device->spec.format);
while ((test_format = *(closefmts++)) != 0) {
if (!SDL_AUDIO_ISFLOAT(test_format)) {
par.le = SDL_AUDIO_ISLITTLEENDIAN(test_format) ? 1 : 0;
par.sig = SDL_AUDIO_ISSIGNED(test_format) ? 1 : 0;
par.bits = SDL_AUDIO_BITSIZE(test_format);
if (SNDIO_sio_setpar(_this->hidden->dev, &par) == 0) {
if (SNDIO_sio_setpar(device->hidden->dev, &par) == 0) {
continue;
}
if (SNDIO_sio_getpar(_this->hidden->dev, &par) == 0) {
if (SNDIO_sio_getpar(device->hidden->dev, &par) == 0) {
return SDL_SetError("sio_getpar() failed");
}
if (par.bps != SIO_BPS(par.bits)) {
@ -282,46 +279,44 @@ static int SNDIO_OpenDevice(SDL_AudioDevice *_this, const char *devname)
}
if (!test_format) {
return SDL_SetError("%s: Unsupported audio format", "sndio");
return SDL_SetError("sndio: Unsupported audio format");
}
if ((par.bps == 4) && (par.sig) && (par.le)) {
_this->spec.format = SDL_AUDIO_S32LSB;
device->spec.format = SDL_AUDIO_S32LSB;
} else if ((par.bps == 4) && (par.sig) && (!par.le)) {
_this->spec.format = SDL_AUDIO_S32MSB;
device->spec.format = SDL_AUDIO_S32MSB;
} else if ((par.bps == 2) && (par.sig) && (par.le)) {
_this->spec.format = SDL_AUDIO_S16LSB;
device->spec.format = SDL_AUDIO_S16LSB;
} else if ((par.bps == 2) && (par.sig) && (!par.le)) {
_this->spec.format = SDL_AUDIO_S16MSB;
device->spec.format = SDL_AUDIO_S16MSB;
} else if ((par.bps == 1) && (par.sig)) {
_this->spec.format = SDL_AUDIO_S8;
device->spec.format = SDL_AUDIO_S8;
} else if ((par.bps == 1) && (!par.sig)) {
_this->spec.format = SDL_AUDIO_U8;
device->spec.format = SDL_AUDIO_U8;
} else {
return SDL_SetError("sndio: Got unsupported hardware audio format.");
}
_this->spec.freq = par.rate;
_this->spec.channels = par.pchan;
_this->spec.samples = par.round;
device->spec.freq = par.rate;
device->spec.channels = par.pchan;
device->sample_frames = par.round;
/* Calculate the final parameters for this audio specification */
SDL_CalculateAudioSpec(&_this->spec);
// Calculate the final parameters for this audio specification
SDL_UpdatedAudioDeviceFormat(device);
/* Allocate mixing buffer */
_this->hidden->mixlen = _this->spec.size;
_this->hidden->mixbuf = (Uint8 *)SDL_malloc(_this->hidden->mixlen);
if (_this->hidden->mixbuf == NULL) {
// Allocate mixing buffer
device->hidden->mixbuf = (Uint8 *)SDL_malloc(device->buffer_size);
if (device->hidden->mixbuf == NULL) {
return SDL_OutOfMemory();
}
SDL_memset(_this->hidden->mixbuf, _this->spec.silence, _this->hidden->mixlen);
SDL_memset(device->hidden->mixbuf, device->silence_value, device->buffer_size);
if (!SNDIO_sio_start(_this->hidden->dev)) {
if (!SNDIO_sio_start(device->hidden->dev)) {
return SDL_SetError("sio_start() failed");
}
/* We're ready to rock and roll. :-) */
return 0;
return 0; // We're ready to rock and roll. :-)
}
static void SNDIO_Deinitialize(void)
@ -329,10 +324,10 @@ static void SNDIO_Deinitialize(void)
UnloadSNDIOLibrary();
}
static void SNDIO_DetectDevices(void)
static void SNDIO_DetectDevices(SDL_AudioDevice **default_output, SDL_AudioDevice **default_capture)
{
SDL_AddAudioDevice(SDL_FALSE, DEFAULT_OUTPUT_DEVNAME, NULL, (void *)0x1);
SDL_AddAudioDevice(SDL_TRUE, DEFAULT_INPUT_DEVNAME, NULL, (void *)0x2);
*default_output = SDL_AddAudioDevice(SDL_FALSE, DEFAULT_OUTPUT_DEVNAME, NULL, (void *)0x1);
*default_capture = SDL_AddAudioDevice(SDL_TRUE, DEFAULT_INPUT_DEVNAME, NULL, (void *)0x2);
}
static SDL_bool SNDIO_Init(SDL_AudioDriverImpl *impl)
@ -341,12 +336,12 @@ static SDL_bool SNDIO_Init(SDL_AudioDriverImpl *impl)
return SDL_FALSE;
}
/* Set the function pointers */
impl->OpenDevice = SNDIO_OpenDevice;
impl->WaitDevice = SNDIO_WaitDevice;
impl->PlayDevice = SNDIO_PlayDevice;
impl->GetDeviceBuf = SNDIO_GetDeviceBuf;
impl->CloseDevice = SNDIO_CloseDevice;
impl->WaitCaptureDevice = SNDIO_WaitDevice;
impl->CaptureFromDevice = SNDIO_CaptureFromDevice;
impl->FlushCapture = SNDIO_FlushCapture;
impl->Deinitialize = SNDIO_Deinitialize;
@ -355,11 +350,11 @@ static SDL_bool SNDIO_Init(SDL_AudioDriverImpl *impl)
impl->AllowsArbitraryDeviceNames = SDL_TRUE;
impl->HasCaptureSupport = SDL_TRUE;
return SDL_TRUE; /* this audio target is available. */
return SDL_TRUE;
}
AudioBootStrap SNDIO_bootstrap = {
"sndio", "OpenBSD sndio", SNDIO_Init, SDL_FALSE
};
#endif /* SDL_AUDIO_DRIVER_SNDIO */
#endif // SDL_AUDIO_DRIVER_SNDIO

12
src/audio/sndio/SDL_sndioaudio.h
View File

@ -30,15 +30,9 @@
struct SDL_PrivateAudioData
{
/* The audio device handle */
struct sio_hdl *dev;
/* Raw mixing buffer */
Uint8 *mixbuf;
int mixlen;
/* Polling structures for non-blocking sndio devices */
struct pollfd *pfd;
struct sio_hdl *dev; // The audio device handle
Uint8 *mixbuf; // Raw mixing buffer
struct pollfd *pfd; // Polling structures for non-blocking sndio devices
};
#endif /* SDL_sndioaudio_h_ */