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Diffstat (limited to '3rdparty/SDL2/src/audio/dsp/SDL_dspaudio.c')
-rw-r--r--3rdparty/SDL2/src/audio/dsp/SDL_dspaudio.c320
1 files changed, 0 insertions, 320 deletions
diff --git a/3rdparty/SDL2/src/audio/dsp/SDL_dspaudio.c b/3rdparty/SDL2/src/audio/dsp/SDL_dspaudio.c
deleted file mode 100644
index a5a31b3aa88..00000000000
--- a/3rdparty/SDL2/src/audio/dsp/SDL_dspaudio.c
+++ /dev/null
@@ -1,320 +0,0 @@
-/*
- 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_OSS
-
-/* Allow access to a raw mixing buffer */
-
-#include <stdio.h> /* For perror() */
-#include <string.h> /* For strerror() */
-#include <errno.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <sys/time.h>
-#include <sys/ioctl.h>
-#include <sys/stat.h>
-
-#if SDL_AUDIO_DRIVER_OSS_SOUNDCARD_H
-/* This is installed on some systems */
-#include <soundcard.h>
-#else
-/* This is recommended by OSS */
-#include <sys/soundcard.h>
-#endif
-
-#include "SDL_timer.h"
-#include "SDL_audio.h"
-#include "../SDL_audio_c.h"
-#include "../SDL_audiodev_c.h"
-#include "SDL_dspaudio.h"
-
-
-static void
-DSP_DetectDevices(void)
-{
- SDL_EnumUnixAudioDevices(0, NULL);
-}
-
-
-static void
-DSP_CloseDevice(_THIS)
-{
- if (this->hidden->audio_fd >= 0) {
- close(this->hidden->audio_fd);
- }
- SDL_free(this->hidden->mixbuf);
- SDL_free(this->hidden);
-}
-
-
-static int
-DSP_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
-{
- const int flags = ((iscapture) ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT);
- int format;
- int value;
- int frag_spec;
- SDL_AudioFormat test_format;
-
- /* 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");
- }
- }
-
- /* Make sure fragment size stays a power of 2, or OSS fails. */
- /* I don't know which of these are actually legal values, though... */
- if (this->spec.channels > 8)
- this->spec.channels = 8;
- else if (this->spec.channels > 4)
- this->spec.channels = 4;
- else if (this->spec.channels > 2)
- this->spec.channels = 2;
-
- /* 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_zerop(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));
- }
-
- /* Make the file descriptor use blocking i/o with fcntl() */
- {
- long ctlflags;
- ctlflags = fcntl(this->hidden->audio_fd, F_GETFL);
- ctlflags &= ~O_NONBLOCK;
- if (fcntl(this->hidden->audio_fd, F_SETFL, ctlflags) < 0) {
- return SDL_SetError("Couldn't set audio blocking mode");
- }
- }
-
- /* Get a list of supported hardware formats */
- if (ioctl(this->hidden->audio_fd, SNDCTL_DSP_GETFMTS, &value) < 0) {
- perror("SNDCTL_DSP_GETFMTS");
- return SDL_SetError("Couldn't get audio format list");
- }
-
- /* Try for a closest match on audio format */
- format = 0;
- for (test_format = SDL_FirstAudioFormat(this->spec.format);
- !format && test_format;) {
-#ifdef DEBUG_AUDIO
- fprintf(stderr, "Trying format 0x%4.4x\n", test_format);
-#endif
- switch (test_format) {
- case AUDIO_U8:
- if (value & AFMT_U8) {
- format = AFMT_U8;
- }
- break;
- case AUDIO_S16LSB:
- if (value & AFMT_S16_LE) {
- format = AFMT_S16_LE;
- }
- break;
- case AUDIO_S16MSB:
- if (value & AFMT_S16_BE) {
- format = AFMT_S16_BE;
- }
- break;
-#if 0
-/*
- * These formats are not used by any real life systems so they are not
- * needed here.
- */
- case AUDIO_S8:
- if (value & AFMT_S8) {
- format = AFMT_S8;
- }
- break;
- case AUDIO_U16LSB:
- if (value & AFMT_U16_LE) {
- format = AFMT_U16_LE;
- }
- break;
- case AUDIO_U16MSB:
- if (value & AFMT_U16_BE) {
- format = AFMT_U16_BE;
- }
- break;
-#endif
- default:
- format = 0;
- break;
- }
- if (!format) {
- test_format = SDL_NextAudioFormat();
- }
- }
- if (format == 0) {
- return SDL_SetError("Couldn't find any hardware audio formats");
- }
- this->spec.format = test_format;
-
- /* Set the audio format */
- value = format;
- if ((ioctl(this->hidden->audio_fd, SNDCTL_DSP_SETFMT, &value) < 0) ||
- (value != format)) {
- perror("SNDCTL_DSP_SETFMT");
- return SDL_SetError("Couldn't set audio format");
- }
-
- /* Set the number of channels of output */
- value = this->spec.channels;
- if (ioctl(this->hidden->audio_fd, SNDCTL_DSP_CHANNELS, &value) < 0) {
- perror("SNDCTL_DSP_CHANNELS");
- return SDL_SetError("Cannot set the number of channels");
- }
- this->spec.channels = value;
-
- /* Set the DSP frequency */
- value = this->spec.freq;
- if (ioctl(this->hidden->audio_fd, SNDCTL_DSP_SPEED, &value) < 0) {
- perror("SNDCTL_DSP_SPEED");
- return SDL_SetError("Couldn't set audio frequency");
- }
- this->spec.freq = value;
-
- /* Calculate the final parameters for this audio specification */
- SDL_CalculateAudioSpec(&this->spec);
-
- /* Determine the power of two of the fragment size */
- for (frag_spec = 0; (0x01U << frag_spec) < this->spec.size; ++frag_spec);
- if ((0x01U << frag_spec) != this->spec.size) {
- return SDL_SetError("Fragment size must be a power of two");
- }
- frag_spec |= 0x00020000; /* two fragments, for low latency */
-
- /* Set the audio buffering parameters */
-#ifdef DEBUG_AUDIO
- fprintf(stderr, "Requesting %d fragments of size %d\n",
- (frag_spec >> 16), 1 << (frag_spec & 0xFFFF));
-#endif
- if (ioctl(this->hidden->audio_fd, SNDCTL_DSP_SETFRAGMENT, &frag_spec) < 0) {
- perror("SNDCTL_DSP_SETFRAGMENT");
- }
-#ifdef DEBUG_AUDIO
- {
- audio_buf_info info;
- ioctl(this->hidden->audio_fd, SNDCTL_DSP_GETOSPACE, &info);
- fprintf(stderr, "fragments = %d\n", info.fragments);
- fprintf(stderr, "fragstotal = %d\n", info.fragstotal);
- fprintf(stderr, "fragsize = %d\n", info.fragsize);
- fprintf(stderr, "bytes = %d\n", info.bytes);
- }
-#endif
-
- /* Allocate mixing buffer */
- if (!iscapture) {
- this->hidden->mixlen = this->spec.size;
- this->hidden->mixbuf = (Uint8 *) SDL_malloc(this->hidden->mixlen);
- if (this->hidden->mixbuf == NULL) {
- return SDL_OutOfMemory();
- }
- SDL_memset(this->hidden->mixbuf, this->spec.silence, this->spec.size);
- }
-
- /* We're ready to rock and roll. :-) */
- return 0;
-}
-
-
-static void
-DSP_PlayDevice(_THIS)
-{
- struct SDL_PrivateAudioData *h = this->hidden;
- if (write(h->audio_fd, h->mixbuf, h->mixlen) == -1) {
- perror("Audio write");
- SDL_OpenedAudioDeviceDisconnected(this);
- }
-#ifdef DEBUG_AUDIO
- fprintf(stderr, "Wrote %d bytes of audio data\n", h->mixlen);
-#endif
-}
-
-static Uint8 *
-DSP_GetDeviceBuf(_THIS)
-{
- return (this->hidden->mixbuf);
-}
-
-static int
-DSP_CaptureFromDevice(_THIS, void *buffer, int buflen)
-{
- return (int) read(this->hidden->audio_fd, buffer, buflen);
-}
-
-static void
-DSP_FlushCapture(_THIS)
-{
- struct SDL_PrivateAudioData *h = this->hidden;
- audio_buf_info info;
- if (ioctl(h->audio_fd, SNDCTL_DSP_GETISPACE, &info) == 0) {
- while (info.bytes > 0) {
- char buf[512];
- const size_t len = SDL_min(sizeof (buf), info.bytes);
- const ssize_t br = read(h->audio_fd, buf, len);
- if (br <= 0) {
- break;
- }
- info.bytes -= br;
- }
- }
-}
-
-static int
-DSP_Init(SDL_AudioDriverImpl * impl)
-{
- /* Set the function pointers */
- impl->DetectDevices = DSP_DetectDevices;
- impl->OpenDevice = DSP_OpenDevice;
- impl->PlayDevice = DSP_PlayDevice;
- impl->GetDeviceBuf = DSP_GetDeviceBuf;
- impl->CloseDevice = DSP_CloseDevice;
- impl->CaptureFromDevice = DSP_CaptureFromDevice;
- impl->FlushCapture = DSP_FlushCapture;
-
- impl->AllowsArbitraryDeviceNames = 1;
- impl->HasCaptureSupport = SDL_TRUE;
-
- return 1; /* this audio target is available. */
-}
-
-
-AudioBootStrap DSP_bootstrap = {
- "dsp", "OSS /dev/dsp standard audio", DSP_Init, 0
-};
-
-#endif /* SDL_AUDIO_DRIVER_OSS */
-
-/* vi: set ts=4 sw=4 expandtab: */