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Diffstat (limited to '3rdparty/SDL2/src/audio/bsd/SDL_bsdaudio.c')
-rw-r--r--3rdparty/SDL2/src/audio/bsd/SDL_bsdaudio.c363
1 files changed, 363 insertions, 0 deletions
diff --git a/3rdparty/SDL2/src/audio/bsd/SDL_bsdaudio.c b/3rdparty/SDL2/src/audio/bsd/SDL_bsdaudio.c
new file mode 100644
index 00000000000..eeb257371fc
--- /dev/null
+++ b/3rdparty/SDL2/src/audio/bsd/SDL_bsdaudio.c
@@ -0,0 +1,363 @@
+/*
+ Simple DirectMedia Layer
+ Copyright (C) 1997-2016 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.
+*/
+#include "../../SDL_internal.h"
+
+#if SDL_AUDIO_DRIVER_BSD
+
+/*
+ * Driver for native OpenBSD/NetBSD audio(4).
+ * vedge@vedge.com.ar.
+ */
+
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/audioio.h>
+
+#include "SDL_timer.h"
+#include "SDL_audio.h"
+#include "../SDL_audiomem.h"
+#include "../SDL_audio_c.h"
+#include "../SDL_audiodev_c.h"
+#include "SDL_bsdaudio.h"
+
+/* Use timer for synchronization */
+/* #define USE_TIMER_SYNC */
+
+/* #define DEBUG_AUDIO */
+/* #define DEBUG_AUDIO_STREAM */
+
+
+static void
+BSDAUDIO_DetectDevices(void)
+{
+ SDL_EnumUnixAudioDevices(0, NULL);
+}
+
+
+static void
+BSDAUDIO_Status(_THIS)
+{
+#ifdef DEBUG_AUDIO
+ /* *INDENT-OFF* */
+ audio_info_t info;
+
+ if (ioctl(this->hidden->audio_fd, AUDIO_GETINFO, &info) < 0) {
+ fprintf(stderr, "AUDIO_GETINFO failed.\n");
+ return;
+ }
+ fprintf(stderr, "\n"
+ "[play/record info]\n"
+ "buffer size : %d bytes\n"
+ "sample rate : %i Hz\n"
+ "channels : %i\n"
+ "precision : %i-bit\n"
+ "encoding : 0x%x\n"
+ "seek : %i\n"
+ "sample count : %i\n"
+ "EOF count : %i\n"
+ "paused : %s\n"
+ "error occured : %s\n"
+ "waiting : %s\n"
+ "active : %s\n"
+ "",
+ info.play.buffer_size,
+ info.play.sample_rate,
+ info.play.channels,
+ info.play.precision,
+ info.play.encoding,
+ info.play.seek,
+ info.play.samples,
+ info.play.eof,
+ info.play.pause ? "yes" : "no",
+ info.play.error ? "yes" : "no",
+ info.play.waiting ? "yes" : "no",
+ info.play.active ? "yes" : "no");
+
+ fprintf(stderr, "\n"
+ "[audio info]\n"
+ "monitor_gain : %i\n"
+ "hw block size : %d bytes\n"
+ "hi watermark : %i\n"
+ "lo watermark : %i\n"
+ "audio mode : %s\n"
+ "",
+ info.monitor_gain,
+ info.blocksize,
+ info.hiwat, info.lowat,
+ (info.mode == AUMODE_PLAY) ? "PLAY"
+ : (info.mode = AUMODE_RECORD) ? "RECORD"
+ : (info.mode == AUMODE_PLAY_ALL ? "PLAY_ALL" : "?"));
+ /* *INDENT-ON* */
+#endif /* DEBUG_AUDIO */
+}
+
+
+/* This function waits until it is possible to write a full sound buffer */
+static void
+BSDAUDIO_WaitDevice(_THIS)
+{
+#ifndef USE_BLOCKING_WRITES /* Not necessary when using blocking writes */
+ /* See if we need to use timed audio synchronization */
+ if (this->hidden->frame_ticks) {
+ /* Use timer for general audio synchronization */
+ Sint32 ticks;
+
+ ticks = ((Sint32) (this->hidden->next_frame - SDL_GetTicks())) - FUDGE_TICKS;
+ if (ticks > 0) {
+ SDL_Delay(ticks);
+ }
+ } else {
+ /* Use select() for audio synchronization */
+ fd_set fdset;
+ struct timeval timeout;
+
+ FD_ZERO(&fdset);
+ FD_SET(this->hidden->audio_fd, &fdset);
+ timeout.tv_sec = 10;
+ timeout.tv_usec = 0;
+#ifdef DEBUG_AUDIO
+ fprintf(stderr, "Waiting for audio to get ready\n");
+#endif
+ if (select(this->hidden->audio_fd + 1, NULL, &fdset, NULL, &timeout)
+ <= 0) {
+ const char *message =
+ "Audio timeout - buggy audio driver? (disabled)";
+ /* In general we should never print to the screen,
+ but in this case we have no other way of letting
+ the user know what happened.
+ */
+ fprintf(stderr, "SDL: %s\n", message);
+ SDL_OpenedAudioDeviceDisconnected(this);
+ /* Don't try to close - may hang */
+ this->hidden->audio_fd = -1;
+#ifdef DEBUG_AUDIO
+ fprintf(stderr, "Done disabling audio\n");
+#endif
+ }
+#ifdef DEBUG_AUDIO
+ fprintf(stderr, "Ready!\n");
+#endif
+ }
+#endif /* !USE_BLOCKING_WRITES */
+}
+
+static void
+BSDAUDIO_PlayDevice(_THIS)
+{
+ int written, p = 0;
+
+ /* Write the audio data, checking for EAGAIN on broken audio drivers */
+ do {
+ written = write(this->hidden->audio_fd,
+ &this->hidden->mixbuf[p], this->hidden->mixlen - p);
+
+ if (written > 0)
+ p += written;
+ if (written == -1 && errno != 0 && errno != EAGAIN && errno != EINTR) {
+ /* Non recoverable error has occurred. It should be reported!!! */
+ perror("audio");
+ break;
+ }
+
+ if (p < written
+ || ((written < 0) && ((errno == 0) || (errno == EAGAIN)))) {
+ SDL_Delay(1); /* Let a little CPU time go by */
+ }
+ } while (p < written);
+
+ /* If timer synchronization is enabled, set the next write frame */
+ if (this->hidden->frame_ticks) {
+ this->hidden->next_frame += this->hidden->frame_ticks;
+ }
+
+ /* If we couldn't write, assume fatal error for now */
+ if (written < 0) {
+ SDL_OpenedAudioDeviceDisconnected(this);
+ }
+#ifdef DEBUG_AUDIO
+ fprintf(stderr, "Wrote %d bytes of audio data\n", written);
+#endif
+}
+
+static Uint8 *
+BSDAUDIO_GetDeviceBuf(_THIS)
+{
+ return (this->hidden->mixbuf);
+}
+
+static void
+BSDAUDIO_CloseDevice(_THIS)
+{
+ if (this->hidden != NULL) {
+ SDL_FreeAudioMem(this->hidden->mixbuf);
+ this->hidden->mixbuf = NULL;
+ if (this->hidden->audio_fd >= 0) {
+ close(this->hidden->audio_fd);
+ this->hidden->audio_fd = -1;
+ }
+ SDL_free(this->hidden);
+ this->hidden = NULL;
+ }
+}
+
+static int
+BSDAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
+{
+ const int flags = ((iscapture) ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT);
+ SDL_AudioFormat format = 0;
+ audio_info_t info;
+
+ /* We don't care what the devname is...we'll try to open anything. */
+ /* ...but default to first name in the list... */
+ if (devname == NULL) {
+ devname = SDL_GetAudioDeviceName(0, iscapture);
+ if (devname == NULL) {
+ return SDL_SetError("No such audio device");
+ }
+ }
+
+ /* Initialize all variables that we clean on shutdown */
+ this->hidden = (struct SDL_PrivateAudioData *)
+ SDL_malloc((sizeof *this->hidden));
+ if (this->hidden == NULL) {
+ return SDL_OutOfMemory();
+ }
+ SDL_memset(this->hidden, 0, (sizeof *this->hidden));
+
+ /* Open the audio device */
+ this->hidden->audio_fd = open(devname, flags, 0);
+ if (this->hidden->audio_fd < 0) {
+ return SDL_SetError("Couldn't open %s: %s", devname, strerror(errno));
+ }
+
+ AUDIO_INITINFO(&info);
+
+ /* Calculate the final parameters for this audio specification */
+ SDL_CalculateAudioSpec(&this->spec);
+
+ /* Set to play mode */
+ info.mode = AUMODE_PLAY;
+ if (ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info) < 0) {
+ BSDAUDIO_CloseDevice(this);
+ return SDL_SetError("Couldn't put device into play mode");
+ }
+
+ AUDIO_INITINFO(&info);
+ for (format = SDL_FirstAudioFormat(this->spec.format);
+ format; format = SDL_NextAudioFormat()) {
+ switch (format) {
+ case AUDIO_U8:
+ info.play.encoding = AUDIO_ENCODING_ULINEAR;
+ info.play.precision = 8;
+ break;
+ case AUDIO_S8:
+ info.play.encoding = AUDIO_ENCODING_SLINEAR;
+ info.play.precision = 8;
+ break;
+ case AUDIO_S16LSB:
+ info.play.encoding = AUDIO_ENCODING_SLINEAR_LE;
+ info.play.precision = 16;
+ break;
+ case AUDIO_S16MSB:
+ info.play.encoding = AUDIO_ENCODING_SLINEAR_BE;
+ info.play.precision = 16;
+ break;
+ case AUDIO_U16LSB:
+ info.play.encoding = AUDIO_ENCODING_ULINEAR_LE;
+ info.play.precision = 16;
+ break;
+ case AUDIO_U16MSB:
+ info.play.encoding = AUDIO_ENCODING_ULINEAR_BE;
+ info.play.precision = 16;
+ break;
+ default:
+ continue;
+ }
+
+ if (ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info) == 0) {
+ break;
+ }
+ }
+
+ if (!format) {
+ BSDAUDIO_CloseDevice(this);
+ return SDL_SetError("No supported encoding for 0x%x", this->spec.format);
+ }
+
+ this->spec.format = format;
+
+ AUDIO_INITINFO(&info);
+ info.play.channels = this->spec.channels;
+ if (ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info) == -1) {
+ this->spec.channels = 1;
+ }
+ AUDIO_INITINFO(&info);
+ info.play.sample_rate = this->spec.freq;
+ info.blocksize = this->spec.size;
+ info.hiwat = 5;
+ info.lowat = 3;
+ (void) ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info);
+ (void) ioctl(this->hidden->audio_fd, AUDIO_GETINFO, &info);
+ this->spec.freq = info.play.sample_rate;
+ /* Allocate mixing buffer */
+ this->hidden->mixlen = this->spec.size;
+ this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
+ if (this->hidden->mixbuf == NULL) {
+ BSDAUDIO_CloseDevice(this);
+ return SDL_OutOfMemory();
+ }
+ SDL_memset(this->hidden->mixbuf, this->spec.silence, this->spec.size);
+
+ BSDAUDIO_Status(this);
+
+ /* We're ready to rock and roll. :-) */
+ return 0;
+}
+
+static int
+BSDAUDIO_Init(SDL_AudioDriverImpl * impl)
+{
+ /* Set the function pointers */
+ impl->DetectDevices = BSDAUDIO_DetectDevices;
+ impl->OpenDevice = BSDAUDIO_OpenDevice;
+ impl->PlayDevice = BSDAUDIO_PlayDevice;
+ impl->WaitDevice = BSDAUDIO_WaitDevice;
+ impl->GetDeviceBuf = BSDAUDIO_GetDeviceBuf;
+ impl->CloseDevice = BSDAUDIO_CloseDevice;
+
+ impl->AllowsArbitraryDeviceNames = 1;
+
+ return 1; /* this audio target is available. */
+}
+
+
+AudioBootStrap BSD_AUDIO_bootstrap = {
+ "bsd", "BSD audio", BSDAUDIO_Init, 0
+};
+
+#endif /* SDL_AUDIO_DRIVER_BSD */
+
+/* vi: set ts=4 sw=4 expandtab: */