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Diffstat (limited to 'distrib/sdl-1.2.12/src/audio/dc/SDL_dcaudio.c')
-rw-r--r--distrib/sdl-1.2.12/src/audio/dc/SDL_dcaudio.c246
1 files changed, 0 insertions, 246 deletions
diff --git a/distrib/sdl-1.2.12/src/audio/dc/SDL_dcaudio.c b/distrib/sdl-1.2.12/src/audio/dc/SDL_dcaudio.c
deleted file mode 100644
index a28ea5a..0000000
--- a/distrib/sdl-1.2.12/src/audio/dc/SDL_dcaudio.c
+++ /dev/null
@@ -1,246 +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"
-
-/* Output dreamcast aica */
-
-#include "SDL_timer.h"
-#include "SDL_audio.h"
-#include "../SDL_audiomem.h"
-#include "../SDL_audio_c.h"
-#include "../SDL_audiodev_c.h"
-#include "SDL_dcaudio.h"
-
-#include "aica.h"
-#include <dc/spu.h>
-
-/* Audio driver functions */
-static int DCAUD_OpenAudio(_THIS, SDL_AudioSpec *spec);
-static void DCAUD_WaitAudio(_THIS);
-static void DCAUD_PlayAudio(_THIS);
-static Uint8 *DCAUD_GetAudioBuf(_THIS);
-static void DCAUD_CloseAudio(_THIS);
-
-/* Audio driver bootstrap functions */
-static int DCAUD_Available(void)
-{
- return 1;
-}
-
-static void DCAUD_DeleteDevice(SDL_AudioDevice *device)
-{
- SDL_free(device->hidden);
- SDL_free(device);
-}
-
-static SDL_AudioDevice *DCAUD_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));
-
- /* Set the function pointers */
- this->OpenAudio = DCAUD_OpenAudio;
- this->WaitAudio = DCAUD_WaitAudio;
- this->PlayAudio = DCAUD_PlayAudio;
- this->GetAudioBuf = DCAUD_GetAudioBuf;
- this->CloseAudio = DCAUD_CloseAudio;
-
- this->free = DCAUD_DeleteDevice;
-
- spu_init();
-
- return this;
-}
-
-AudioBootStrap DCAUD_bootstrap = {
- "dcaudio", "Dreamcast AICA audio",
- DCAUD_Available, DCAUD_CreateDevice
-};
-
-/* This function waits until it is possible to write a full sound buffer */
-static void DCAUD_WaitAudio(_THIS)
-{
- if (this->hidden->playing) {
- /* wait */
- while(aica_get_pos(0)/this->spec.samples == this->hidden->nextbuf) {
- thd_pass();
- }
- }
-}
-
-#define SPU_RAM_BASE 0xa0800000
-
-static void spu_memload_stereo8(int leftpos,int rightpos,void *src0,size_t size)
-{
- uint8 *src = src0;
- uint32 *left = (uint32*)(leftpos +SPU_RAM_BASE);
- uint32 *right = (uint32*)(rightpos+SPU_RAM_BASE);
- size = (size+7)/8;
- while(size--) {
- unsigned lval,rval;
- lval = *src++;
- rval = *src++;
- lval|= (*src++)<<8;
- rval|= (*src++)<<8;
- lval|= (*src++)<<16;
- rval|= (*src++)<<16;
- lval|= (*src++)<<24;
- rval|= (*src++)<<24;
- g2_write_32(left++,lval);
- g2_write_32(right++,rval);
- g2_fifo_wait();
- }
-}
-
-static void spu_memload_stereo16(int leftpos,int rightpos,void *src0,size_t size)
-{
- uint16 *src = src0;
- uint32 *left = (uint32*)(leftpos +SPU_RAM_BASE);
- uint32 *right = (uint32*)(rightpos+SPU_RAM_BASE);
- size = (size+7)/8;
- while(size--) {
- unsigned lval,rval;
- lval = *src++;
- rval = *src++;
- lval|= (*src++)<<16;
- rval|= (*src++)<<16;
- g2_write_32(left++,lval);
- g2_write_32(right++,rval);
- g2_fifo_wait();
- }
-}
-
-static void DCAUD_PlayAudio(_THIS)
-{
- SDL_AudioSpec *spec = &this->spec;
- unsigned int offset;
-
- if (this->hidden->playing) {
- /* wait */
- while(aica_get_pos(0)/spec->samples == this->hidden->nextbuf) {
- thd_pass();
- }
- }
-
- offset = this->hidden->nextbuf*spec->size;
- this->hidden->nextbuf^=1;
- /* Write the audio data, checking for EAGAIN on broken audio drivers */
- if (spec->channels==1) {
- spu_memload(this->hidden->leftpos+offset,this->hidden->mixbuf,this->hidden->mixlen);
- } else {
- offset/=2;
- if ((this->spec.format&255)==8) {
- spu_memload_stereo8(this->hidden->leftpos+offset,this->hidden->rightpos+offset,this->hidden->mixbuf,this->hidden->mixlen);
- } else {
- spu_memload_stereo16(this->hidden->leftpos+offset,this->hidden->rightpos+offset,this->hidden->mixbuf,this->hidden->mixlen);
- }
- }
-
- if (!this->hidden->playing) {
- int mode;
- this->hidden->playing = 1;
- mode = (spec->format==AUDIO_S8)?SM_8BIT:SM_16BIT;
- if (spec->channels==1) {
- aica_play(0,mode,this->hidden->leftpos,0,spec->samples*2,spec->freq,255,128,1);
- } else {
- aica_play(0,mode,this->hidden->leftpos ,0,spec->samples*2,spec->freq,255,0,1);
- aica_play(1,mode,this->hidden->rightpos,0,spec->samples*2,spec->freq,255,255,1);
- }
- }
-}
-
-static Uint8 *DCAUD_GetAudioBuf(_THIS)
-{
- return(this->hidden->mixbuf);
-}
-
-static void DCAUD_CloseAudio(_THIS)
-{
- aica_stop(0);
- if (this->spec.channels==2) aica_stop(1);
- if ( this->hidden->mixbuf != NULL ) {
- SDL_FreeAudioMem(this->hidden->mixbuf);
- this->hidden->mixbuf = NULL;
- }
-}
-
-static int DCAUD_OpenAudio(_THIS, SDL_AudioSpec *spec)
-{
- Uint16 test_format = SDL_FirstAudioFormat(spec->format);
- int valid_datatype = 0;
- while ((!valid_datatype) && (test_format)) {
- spec->format = test_format;
- switch (test_format) {
- /* only formats Dreamcast accepts... */
- case AUDIO_S8:
- case AUDIO_S16LSB:
- valid_datatype = 1;
- break;
-
- default:
- test_format = SDL_NextAudioFormat();
- break;
- }
- }
-
- if (!valid_datatype) { /* shouldn't happen, but just in case... */
- SDL_SetError("Unsupported audio format");
- return (-1);
- }
-
- if (spec->channels > 2)
- spec->channels = 2; /* no more than stereo on the Dreamcast. */
-
- /* Update the fragment size as size in bytes */
- SDL_CalculateAudioSpec(spec);
-
- /* Allocate mixing buffer */
- this->hidden->mixlen = spec->size;
- this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
- if ( this->hidden->mixbuf == NULL ) {
- return(-1);
- }
- SDL_memset(this->hidden->mixbuf, spec->silence, spec->size);
- this->hidden->leftpos = 0x11000;
- this->hidden->rightpos = 0x11000+spec->size;
- this->hidden->playing = 0;
- this->hidden->nextbuf = 0;
-
- /* We're ready to rock and roll. :-) */
- return(0);
-}
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