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Diffstat (limited to 'distrib/sdl-1.2.12/src/audio/sun/SDL_sunaudio.c')
-rw-r--r--distrib/sdl-1.2.12/src/audio/sun/SDL_sunaudio.c432
1 files changed, 0 insertions, 432 deletions
diff --git a/distrib/sdl-1.2.12/src/audio/sun/SDL_sunaudio.c b/distrib/sdl-1.2.12/src/audio/sun/SDL_sunaudio.c
deleted file mode 100644
index 5ddaba1..0000000
--- a/distrib/sdl-1.2.12/src/audio/sun/SDL_sunaudio.c
+++ /dev/null
@@ -1,432 +0,0 @@
-/*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997-2006 Sam Lantinga
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
- Sam Lantinga
- slouken@libsdl.org
-*/
-#include "SDL_config.h"
-
-/* Allow access to a raw mixing buffer */
-
-#include <fcntl.h>
-#include <errno.h>
-#ifdef __NETBSD__
-#include <sys/ioctl.h>
-#include <sys/audioio.h>
-#endif
-#ifdef __SVR4
-#include <sys/audioio.h>
-#else
-#include <sys/time.h>
-#include <sys/types.h>
-#endif
-#include <unistd.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_sunaudio.h"
-
-/* Open the audio device for playback, and don't block if busy */
-#define OPEN_FLAGS (O_WRONLY|O_NONBLOCK)
-
-/* Audio driver functions */
-static int DSP_OpenAudio(_THIS, SDL_AudioSpec *spec);
-static void DSP_WaitAudio(_THIS);
-static void DSP_PlayAudio(_THIS);
-static Uint8 *DSP_GetAudioBuf(_THIS);
-static void DSP_CloseAudio(_THIS);
-
-static Uint8 snd2au(int sample);
-
-/* Audio driver bootstrap functions */
-
-static int Audio_Available(void)
-{
- int fd;
- int available;
-
- available = 0;
- fd = SDL_OpenAudioPath(NULL, 0, OPEN_FLAGS, 1);
- if ( fd >= 0 ) {
- available = 1;
- close(fd);
- }
- return(available);
-}
-
-static void Audio_DeleteDevice(SDL_AudioDevice *device)
-{
- SDL_free(device->hidden);
- SDL_free(device);
-}
-
-static SDL_AudioDevice *Audio_CreateDevice(int devindex)
-{
- SDL_AudioDevice *this;
-
- /* Initialize all variables that we clean on shutdown */
- this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
- if ( this ) {
- SDL_memset(this, 0, (sizeof *this));
- this->hidden = (struct SDL_PrivateAudioData *)
- SDL_malloc((sizeof *this->hidden));
- }
- if ( (this == NULL) || (this->hidden == NULL) ) {
- SDL_OutOfMemory();
- if ( this ) {
- SDL_free(this);
- }
- return(0);
- }
- SDL_memset(this->hidden, 0, (sizeof *this->hidden));
- audio_fd = -1;
-
- /* Set the function pointers */
- this->OpenAudio = DSP_OpenAudio;
- this->WaitAudio = DSP_WaitAudio;
- this->PlayAudio = DSP_PlayAudio;
- this->GetAudioBuf = DSP_GetAudioBuf;
- this->CloseAudio = DSP_CloseAudio;
-
- this->free = Audio_DeleteDevice;
-
- return this;
-}
-
-AudioBootStrap SUNAUDIO_bootstrap = {
- "audio", "UNIX /dev/audio interface",
- Audio_Available, Audio_CreateDevice
-};
-
-#ifdef DEBUG_AUDIO
-void CheckUnderflow(_THIS)
-{
-#ifdef AUDIO_GETINFO
- audio_info_t info;
- int left;
-
- ioctl(audio_fd, AUDIO_GETINFO, &info);
- left = (written - info.play.samples);
- if ( written && (left == 0) ) {
- fprintf(stderr, "audio underflow!\n");
- }
-#endif
-}
-#endif
-
-void DSP_WaitAudio(_THIS)
-{
-#ifdef AUDIO_GETINFO
-#define SLEEP_FUDGE 10 /* 10 ms scheduling fudge factor */
- audio_info_t info;
- Sint32 left;
-
- ioctl(audio_fd, AUDIO_GETINFO, &info);
- left = (written - info.play.samples);
- if ( left > fragsize ) {
- Sint32 sleepy;
-
- sleepy = ((left - fragsize)/frequency);
- sleepy -= SLEEP_FUDGE;
- if ( sleepy > 0 ) {
- SDL_Delay(sleepy);
- }
- }
-#else
- fd_set fdset;
-
- FD_ZERO(&fdset);
- FD_SET(audio_fd, &fdset);
- select(audio_fd+1, NULL, &fdset, NULL, NULL);
-#endif
-}
-
-void DSP_PlayAudio(_THIS)
-{
- /* Write the audio data */
- if ( ulaw_only ) {
- /* Assuming that this->spec.freq >= 8000 Hz */
- int accum, incr, pos;
- Uint8 *aubuf;
-
- accum = 0;
- incr = this->spec.freq/8;
- aubuf = ulaw_buf;
- switch (audio_fmt & 0xFF) {
- case 8: {
- Uint8 *sndbuf;
-
- sndbuf = mixbuf;
- for ( pos=0; pos < fragsize; ++pos ) {
- *aubuf = snd2au((0x80-*sndbuf)*64);
- accum += incr;
- while ( accum > 0 ) {
- accum -= 1000;
- sndbuf += 1;
- }
- aubuf += 1;
- }
- }
- break;
- case 16: {
- Sint16 *sndbuf;
-
- sndbuf = (Sint16 *)mixbuf;
- for ( pos=0; pos < fragsize; ++pos ) {
- *aubuf = snd2au(*sndbuf/4);
- accum += incr;
- while ( accum > 0 ) {
- accum -= 1000;
- sndbuf += 1;
- }
- aubuf += 1;
- }
- }
- break;
- }
-#ifdef DEBUG_AUDIO
- CheckUnderflow(this);
-#endif
- if ( write(audio_fd, ulaw_buf, fragsize) < 0 ) {
- /* Assume fatal error, for now */
- this->enabled = 0;
- }
- written += fragsize;
- } else {
-#ifdef DEBUG_AUDIO
- CheckUnderflow(this);
-#endif
- if ( write(audio_fd, mixbuf, this->spec.size) < 0 ) {
- /* Assume fatal error, for now */
- this->enabled = 0;
- }
- written += fragsize;
- }
-}
-
-Uint8 *DSP_GetAudioBuf(_THIS)
-{
- return(mixbuf);
-}
-
-void DSP_CloseAudio(_THIS)
-{
- if ( mixbuf != NULL ) {
- SDL_FreeAudioMem(mixbuf);
- mixbuf = NULL;
- }
- if ( ulaw_buf != NULL ) {
- SDL_free(ulaw_buf);
- ulaw_buf = NULL;
- }
- close(audio_fd);
-}
-
-int DSP_OpenAudio(_THIS, SDL_AudioSpec *spec)
-{
- char audiodev[1024];
-#ifdef AUDIO_SETINFO
- int enc;
-#endif
- int desired_freq = spec->freq;
-
- /* Initialize our freeable variables, in case we fail*/
- audio_fd = -1;
- mixbuf = NULL;
- ulaw_buf = NULL;
-
- /* Determine the audio parameters from the AudioSpec */
- switch ( spec->format & 0xFF ) {
-
- case 8: { /* Unsigned 8 bit audio data */
- spec->format = AUDIO_U8;
-#ifdef AUDIO_SETINFO
- enc = AUDIO_ENCODING_LINEAR8;
-#endif
- }
- break;
-
- case 16: { /* Signed 16 bit audio data */
- spec->format = AUDIO_S16SYS;
-#ifdef AUDIO_SETINFO
- enc = AUDIO_ENCODING_LINEAR;
-#endif
- }
- break;
-
- default: {
- SDL_SetError("Unsupported audio format");
- return(-1);
- }
- }
- audio_fmt = spec->format;
-
- /* Open the audio device */
- audio_fd = SDL_OpenAudioPath(audiodev, sizeof(audiodev), OPEN_FLAGS, 1);
- if ( audio_fd < 0 ) {
- SDL_SetError("Couldn't open %s: %s", audiodev,
- strerror(errno));
- return(-1);
- }
-
- ulaw_only = 0; /* modern Suns do support linear audio */
-#ifdef AUDIO_SETINFO
- for(;;) {
- audio_info_t info;
- AUDIO_INITINFO(&info); /* init all fields to "no change" */
-
- /* Try to set the requested settings */
- info.play.sample_rate = spec->freq;
- info.play.channels = spec->channels;
- info.play.precision = (enc == AUDIO_ENCODING_ULAW)
- ? 8 : spec->format & 0xff;
- info.play.encoding = enc;
- if( ioctl(audio_fd, AUDIO_SETINFO, &info) == 0 ) {
-
- /* Check to be sure we got what we wanted */
- if(ioctl(audio_fd, AUDIO_GETINFO, &info) < 0) {
- SDL_SetError("Error getting audio parameters: %s",
- strerror(errno));
- return -1;
- }
- if(info.play.encoding == enc
- && info.play.precision == (spec->format & 0xff)
- && info.play.channels == spec->channels) {
- /* Yow! All seems to be well! */
- spec->freq = info.play.sample_rate;
- break;
- }
- }
-
- switch(enc) {
- case AUDIO_ENCODING_LINEAR8:
- /* unsigned 8bit apparently not supported here */
- enc = AUDIO_ENCODING_LINEAR;
- spec->format = AUDIO_S16SYS;
- break; /* try again */
-
- case AUDIO_ENCODING_LINEAR:
- /* linear 16bit didn't work either, resort to µ-law */
- enc = AUDIO_ENCODING_ULAW;
- spec->channels = 1;
- spec->freq = 8000;
- spec->format = AUDIO_U8;
- ulaw_only = 1;
- break;
-
- default:
- /* oh well... */
- SDL_SetError("Error setting audio parameters: %s",
- strerror(errno));
- return -1;
- }
- }
-#endif /* AUDIO_SETINFO */
- written = 0;
-
- /* We can actually convert on-the-fly to U-Law */
- if ( ulaw_only ) {
- spec->freq = desired_freq;
- fragsize = (spec->samples*1000)/(spec->freq/8);
- frequency = 8;
- ulaw_buf = (Uint8 *)SDL_malloc(fragsize);
- if ( ulaw_buf == NULL ) {
- SDL_OutOfMemory();
- return(-1);
- }
- spec->channels = 1;
- } else {
- fragsize = spec->samples;
- frequency = spec->freq/1000;
- }
-#ifdef DEBUG_AUDIO
- fprintf(stderr, "Audio device %s U-Law only\n",
- ulaw_only ? "is" : "is not");
- fprintf(stderr, "format=0x%x chan=%d freq=%d\n",
- spec->format, spec->channels, spec->freq);
-#endif
-
- /* Update the fragment size as size in bytes */
- SDL_CalculateAudioSpec(spec);
-
- /* Allocate mixing buffer */
- mixbuf = (Uint8 *)SDL_AllocAudioMem(spec->size);
- if ( mixbuf == NULL ) {
- SDL_OutOfMemory();
- return(-1);
- }
- SDL_memset(mixbuf, spec->silence, spec->size);
-
- /* We're ready to rock and roll. :-) */
- return(0);
-}
-
-/************************************************************************/
-/* This function (snd2au()) copyrighted: */
-/************************************************************************/
-/* Copyright 1989 by Rich Gopstein and Harris Corporation */
-/* */
-/* Permission to use, copy, modify, and distribute this software */
-/* and its documentation for any purpose and without fee is */
-/* hereby granted, provided that the above copyright notice */
-/* appears in all copies and that both that copyright notice and */
-/* this permission notice appear in supporting documentation, and */
-/* that the name of Rich Gopstein and Harris Corporation not be */
-/* used in advertising or publicity pertaining to distribution */
-/* of the software without specific, written prior permission. */
-/* Rich Gopstein and Harris Corporation make no representations */
-/* about the suitability of this software for any purpose. It */
-/* provided "as is" without express or implied warranty. */
-/************************************************************************/
-
-static Uint8 snd2au(int sample)
-{
-
- int mask;
-
- if (sample < 0) {
- sample = -sample;
- mask = 0x7f;
- } else {
- mask = 0xff;
- }
-
- if (sample < 32) {
- sample = 0xF0 | (15 - sample / 2);
- } else if (sample < 96) {
- sample = 0xE0 | (15 - (sample - 32) / 4);
- } else if (sample < 224) {
- sample = 0xD0 | (15 - (sample - 96) / 8);
- } else if (sample < 480) {
- sample = 0xC0 | (15 - (sample - 224) / 16);
- } else if (sample < 992) {
- sample = 0xB0 | (15 - (sample - 480) / 32);
- } else if (sample < 2016) {
- sample = 0xA0 | (15 - (sample - 992) / 64);
- } else if (sample < 4064) {
- sample = 0x90 | (15 - (sample - 2016) / 128);
- } else if (sample < 8160) {
- sample = 0x80 | (15 - (sample - 4064) / 256);
- } else {
- sample = 0x80;
- }
- return (mask & sample);
-}
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