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https://github.com/Ryujinx/SDL.git
synced 2024-12-23 11:16:27 +00:00
Fixed bug 3705 - Add capture support to the sndio backend
kdrakehp The attached patch adds capture support to the sndio backend. The patch also allows the `OpenDevice' function to accept arbitrary device names.
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01050d4ed1
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@ -33,6 +33,7 @@
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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.h"
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@ -47,6 +48,9 @@ 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_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_nfds)(struct sio_hdl *);
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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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@ -83,6 +87,9 @@ load_sndio_syms(void)
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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_pollfd);
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SDL_SNDIO_SYM(sio_nfds);
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SDL_SNDIO_SYM(sio_revents);
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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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@ -164,6 +171,44 @@ SNDIO_PlayDevice(_THIS)
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#endif
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}
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static int
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SNDIO_CaptureFromDevice(_THIS, void *buffer, int buflen)
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{
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int revents;
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int nfds;
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int i;
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int r;
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/* Emulate a blocking read */
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for (i = SNDIO_sio_read(this->hidden->dev, buffer, buflen); i < buflen;) {
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if ((nfds = SNDIO_sio_pollfd(this->hidden->dev, this->hidden->pfd, POLLIN)) <= 0
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|| poll(this->hidden->pfd, nfds, INFTIM) <= 0) {
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break;
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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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if ((r = SNDIO_sio_read(this->hidden->dev, (char *)buffer + i, buflen - i)) == 0) {
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break;
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}
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i += r;
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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 i;
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}
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static void
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SNDIO_FlushCapture(_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 *
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SNDIO_GetDeviceBuf(_THIS)
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{
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@ -173,6 +218,9 @@ SNDIO_GetDeviceBuf(_THIS)
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static void
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SNDIO_CloseDevice(_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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@ -197,11 +245,19 @@ SNDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
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this->hidden->mixlen = this->spec.size;
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/* !!! FIXME: SIO_DEVANY can be a specific device... */
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if ((this->hidden->dev = SNDIO_sio_open(SIO_DEVANY, SIO_PLAY, 0)) == NULL) {
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/* Capture devices must be non-blocking for SNDIO_FlushCapture */
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if ((this->hidden->dev =
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SNDIO_sio_open(devname != NULL ? SIO_DEVANY : devname,
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iscapture ? SIO_REC : SIO_PLAY, iscapture)) == 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 && (this->hidden->pfd =
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SDL_malloc(sizeof(struct pollfd) * SNDIO_sio_nfds(this->hidden->dev))) == NULL) {
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return SDL_OutOfMemory();
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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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@ -300,8 +356,12 @@ SNDIO_Init(SDL_AudioDriverImpl * impl)
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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->OnlyHasDefaultOutputDevice = 1; /* !!! FIXME: sndio can handle multiple devices. */
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impl->AllowsArbitraryDeviceNames = 1;
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impl->HasCaptureSupport = SDL_TRUE;
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return 1; /* this audio target is available. */
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}
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@ -23,6 +23,7 @@
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#ifndef _SDL_sndioaudio_h
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#define _SDL_sndioaudio_h
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#include <poll.h>
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#include <sndio.h>
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#include "../SDL_sysaudio.h"
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@ -38,6 +39,9 @@ struct SDL_PrivateAudioData
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/* Raw mixing buffer */
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Uint8 *mixbuf;
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int mixlen;
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/* Polling structures for non-blocking sndio devices */
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struct pollfd *pfd;
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};
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#endif /* _SDL_sndioaudio_h */
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