forked from Green-Sky/tomato
366 lines
10 KiB
C
366 lines
10 KiB
C
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/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_internal.h"
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#ifdef SDL_AUDIO_DRIVER_SNDIO
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/* OpenBSD sndio target */
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#ifdef HAVE_STDIO_H
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#include <stdio.h>
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#endif
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#ifdef HAVE_SIGNAL_H
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#include <signal.h>
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#endif
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#include <poll.h>
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#include <unistd.h>
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#include "../SDL_audio_c.h"
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#include "SDL_sndioaudio.h"
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#ifdef SDL_AUDIO_DRIVER_SNDIO_DYNAMIC
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#endif
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#ifndef INFTIM
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#define INFTIM -1
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#endif
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#ifndef SIO_DEVANY
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#define SIO_DEVANY "default"
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#endif
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static struct sio_hdl *(*SNDIO_sio_open)(const char *, unsigned int, int);
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static void (*SNDIO_sio_close)(struct sio_hdl *);
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static int (*SNDIO_sio_setpar)(struct sio_hdl *, struct sio_par *);
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static int (*SNDIO_sio_getpar)(struct sio_hdl *, struct sio_par *);
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static int (*SNDIO_sio_start)(struct sio_hdl *);
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static int (*SNDIO_sio_stop)(struct sio_hdl *);
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static size_t (*SNDIO_sio_read)(struct sio_hdl *, void *, size_t);
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static size_t (*SNDIO_sio_write)(struct sio_hdl *, const void *, size_t);
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static int (*SNDIO_sio_nfds)(struct sio_hdl *);
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static int (*SNDIO_sio_pollfd)(struct sio_hdl *, struct pollfd *, int);
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static int (*SNDIO_sio_revents)(struct sio_hdl *, struct pollfd *);
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static int (*SNDIO_sio_eof)(struct sio_hdl *);
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static void (*SNDIO_sio_initpar)(struct sio_par *);
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#ifdef SDL_AUDIO_DRIVER_SNDIO_DYNAMIC
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static const char *sndio_library = SDL_AUDIO_DRIVER_SNDIO_DYNAMIC;
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static void *sndio_handle = NULL;
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static int load_sndio_sym(const char *fn, void **addr)
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{
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*addr = SDL_LoadFunction(sndio_handle, fn);
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if (*addr == NULL) {
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/* Don't call SDL_SetError(): SDL_LoadFunction already did. */
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return 0;
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}
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return 1;
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}
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/* cast funcs to char* first, to please GCC's strict aliasing rules. */
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#define SDL_SNDIO_SYM(x) \
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if (!load_sndio_sym(#x, (void **)(char *)&SNDIO_##x)) \
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return -1
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#else
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#define SDL_SNDIO_SYM(x) SNDIO_##x = x
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#endif
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static int load_sndio_syms(void)
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{
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SDL_SNDIO_SYM(sio_open);
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SDL_SNDIO_SYM(sio_close);
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SDL_SNDIO_SYM(sio_setpar);
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SDL_SNDIO_SYM(sio_getpar);
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SDL_SNDIO_SYM(sio_start);
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SDL_SNDIO_SYM(sio_stop);
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SDL_SNDIO_SYM(sio_read);
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SDL_SNDIO_SYM(sio_write);
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SDL_SNDIO_SYM(sio_nfds);
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SDL_SNDIO_SYM(sio_pollfd);
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SDL_SNDIO_SYM(sio_revents);
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SDL_SNDIO_SYM(sio_eof);
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SDL_SNDIO_SYM(sio_initpar);
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return 0;
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}
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#undef SDL_SNDIO_SYM
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#ifdef SDL_AUDIO_DRIVER_SNDIO_DYNAMIC
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static void UnloadSNDIOLibrary(void)
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{
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if (sndio_handle != NULL) {
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SDL_UnloadObject(sndio_handle);
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sndio_handle = NULL;
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}
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}
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static int LoadSNDIOLibrary(void)
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{
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int retval = 0;
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if (sndio_handle == NULL) {
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sndio_handle = SDL_LoadObject(sndio_library);
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if (sndio_handle == NULL) {
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retval = -1;
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/* Don't call SDL_SetError(): SDL_LoadObject already did. */
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} else {
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retval = load_sndio_syms();
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if (retval < 0) {
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UnloadSNDIOLibrary();
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}
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}
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}
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return retval;
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}
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#else
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static void UnloadSNDIOLibrary(void)
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{
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}
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static int LoadSNDIOLibrary(void)
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{
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load_sndio_syms();
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return 0;
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}
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#endif /* SDL_AUDIO_DRIVER_SNDIO_DYNAMIC */
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static void SNDIO_WaitDevice(SDL_AudioDevice *_this)
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{
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/* no-op; SNDIO_sio_write() blocks if necessary. */
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}
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static void SNDIO_PlayDevice(SDL_AudioDevice *_this)
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{
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const int written = SNDIO_sio_write(_this->hidden->dev,
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_this->hidden->mixbuf,
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_this->hidden->mixlen);
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/* If we couldn't write, assume fatal error for now */
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if (written == 0) {
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SDL_OpenedAudioDeviceDisconnected(_this);
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}
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#ifdef DEBUG_AUDIO
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fprintf(stderr, "Wrote %d bytes of audio data\n", written);
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#endif
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}
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static int SNDIO_CaptureFromDevice(SDL_AudioDevice *_this, void *buffer, int buflen)
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{
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size_t r;
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int revents;
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int nfds;
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/* Emulate a blocking read */
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r = SNDIO_sio_read(_this->hidden->dev, buffer, buflen);
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while (r == 0 && !SNDIO_sio_eof(_this->hidden->dev)) {
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nfds = SNDIO_sio_pollfd(_this->hidden->dev, _this->hidden->pfd, POLLIN);
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if (nfds <= 0 || poll(_this->hidden->pfd, nfds, INFTIM) < 0) {
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return -1;
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}
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revents = SNDIO_sio_revents(_this->hidden->dev, _this->hidden->pfd);
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if (revents & POLLIN) {
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r = SNDIO_sio_read(_this->hidden->dev, buffer, buflen);
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}
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if (revents & POLLHUP) {
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break;
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}
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}
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return (int)r;
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}
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static void SNDIO_FlushCapture(SDL_AudioDevice *_this)
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{
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char buf[512];
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while (SNDIO_sio_read(_this->hidden->dev, buf, sizeof(buf)) != 0) {
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/* do nothing */;
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}
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}
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static Uint8 *SNDIO_GetDeviceBuf(SDL_AudioDevice *_this)
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{
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return _this->hidden->mixbuf;
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}
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static void SNDIO_CloseDevice(SDL_AudioDevice *_this)
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{
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if (_this->hidden->pfd != NULL) {
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SDL_free(_this->hidden->pfd);
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}
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if (_this->hidden->dev != NULL) {
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SNDIO_sio_stop(_this->hidden->dev);
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SNDIO_sio_close(_this->hidden->dev);
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}
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SDL_free(_this->hidden->mixbuf);
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SDL_free(_this->hidden);
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}
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static int SNDIO_OpenDevice(SDL_AudioDevice *_this, const char *devname)
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{
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SDL_AudioFormat test_format;
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const SDL_AudioFormat *closefmts;
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struct sio_par par;
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SDL_bool iscapture = _this->iscapture;
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_this->hidden = (struct SDL_PrivateAudioData *)
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SDL_malloc(sizeof(*_this->hidden));
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if (_this->hidden == NULL) {
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return SDL_OutOfMemory();
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}
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SDL_zerop(_this->hidden);
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_this->hidden->mixlen = _this->spec.size;
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/* Capture devices must be non-blocking for SNDIO_FlushCapture */
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_this->hidden->dev = SNDIO_sio_open(devname != NULL ? devname : SIO_DEVANY,
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iscapture ? SIO_REC : SIO_PLAY, iscapture);
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if (_this->hidden->dev == NULL) {
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return SDL_SetError("sio_open() failed");
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}
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/* Allocate the pollfd array for capture devices */
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if (iscapture) {
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_this->hidden->pfd = SDL_malloc(sizeof(struct pollfd) * SNDIO_sio_nfds(_this->hidden->dev));
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if (_this->hidden->pfd == NULL) {
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return SDL_OutOfMemory();
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}
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}
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SNDIO_sio_initpar(&par);
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par.rate = _this->spec.freq;
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par.pchan = _this->spec.channels;
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par.round = _this->spec.samples;
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par.appbufsz = par.round * 2;
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/* Try for a closest match on audio format */
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closefmts = SDL_ClosestAudioFormats(_this->spec.format);
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while ((test_format = *(closefmts++)) != 0) {
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if (!SDL_AUDIO_ISFLOAT(test_format)) {
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par.le = SDL_AUDIO_ISLITTLEENDIAN(test_format) ? 1 : 0;
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par.sig = SDL_AUDIO_ISSIGNED(test_format) ? 1 : 0;
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par.bits = SDL_AUDIO_BITSIZE(test_format);
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if (SNDIO_sio_setpar(_this->hidden->dev, &par) == 0) {
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continue;
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}
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if (SNDIO_sio_getpar(_this->hidden->dev, &par) == 0) {
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return SDL_SetError("sio_getpar() failed");
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}
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if (par.bps != SIO_BPS(par.bits)) {
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continue;
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}
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if ((par.bits == 8 * par.bps) || (par.msb)) {
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break;
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}
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}
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}
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if (!test_format) {
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return SDL_SetError("%s: Unsupported audio format", "sndio");
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}
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if ((par.bps == 4) && (par.sig) && (par.le)) {
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_this->spec.format = SDL_AUDIO_S32LSB;
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} else if ((par.bps == 4) && (par.sig) && (!par.le)) {
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_this->spec.format = SDL_AUDIO_S32MSB;
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} else if ((par.bps == 2) && (par.sig) && (par.le)) {
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_this->spec.format = SDL_AUDIO_S16LSB;
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} else if ((par.bps == 2) && (par.sig) && (!par.le)) {
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_this->spec.format = SDL_AUDIO_S16MSB;
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} else if ((par.bps == 1) && (par.sig)) {
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_this->spec.format = SDL_AUDIO_S8;
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} else if ((par.bps == 1) && (!par.sig)) {
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_this->spec.format = SDL_AUDIO_U8;
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} else {
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return SDL_SetError("sndio: Got unsupported hardware audio format.");
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}
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_this->spec.freq = par.rate;
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_this->spec.channels = par.pchan;
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_this->spec.samples = par.round;
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/* Calculate the final parameters for this audio specification */
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SDL_CalculateAudioSpec(&_this->spec);
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/* Allocate mixing buffer */
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_this->hidden->mixlen = _this->spec.size;
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_this->hidden->mixbuf = (Uint8 *)SDL_malloc(_this->hidden->mixlen);
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if (_this->hidden->mixbuf == NULL) {
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return SDL_OutOfMemory();
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}
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SDL_memset(_this->hidden->mixbuf, _this->spec.silence, _this->hidden->mixlen);
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if (!SNDIO_sio_start(_this->hidden->dev)) {
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return SDL_SetError("sio_start() failed");
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}
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/* We're ready to rock and roll. :-) */
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return 0;
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}
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static void SNDIO_Deinitialize(void)
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{
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UnloadSNDIOLibrary();
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}
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static void SNDIO_DetectDevices(void)
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{
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SDL_AddAudioDevice(SDL_FALSE, DEFAULT_OUTPUT_DEVNAME, NULL, (void *)0x1);
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SDL_AddAudioDevice(SDL_TRUE, DEFAULT_INPUT_DEVNAME, NULL, (void *)0x2);
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}
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static SDL_bool SNDIO_Init(SDL_AudioDriverImpl *impl)
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{
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if (LoadSNDIOLibrary() < 0) {
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return SDL_FALSE;
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}
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/* Set the function pointers */
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impl->OpenDevice = SNDIO_OpenDevice;
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impl->WaitDevice = SNDIO_WaitDevice;
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impl->PlayDevice = SNDIO_PlayDevice;
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impl->GetDeviceBuf = SNDIO_GetDeviceBuf;
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impl->CloseDevice = SNDIO_CloseDevice;
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impl->CaptureFromDevice = SNDIO_CaptureFromDevice;
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impl->FlushCapture = SNDIO_FlushCapture;
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impl->Deinitialize = SNDIO_Deinitialize;
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impl->DetectDevices = SNDIO_DetectDevices;
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impl->AllowsArbitraryDeviceNames = SDL_TRUE;
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impl->HasCaptureSupport = SDL_TRUE;
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return SDL_TRUE; /* this audio target is available. */
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}
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AudioBootStrap SNDIO_bootstrap = {
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"sndio", "OpenBSD sndio", SNDIO_Init, SDL_FALSE
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||
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};
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||
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||
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#endif /* SDL_AUDIO_DRIVER_SNDIO */
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