Removed outdated Dreamcast support

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%403813
This commit is contained in:
Sam Lantinga 2009-09-19 07:21:22 +00:00
parent 6ecdaa1fe3
commit 232c747269
39 changed files with 8 additions and 2772 deletions

View file

@ -140,9 +140,6 @@ static const AudioBootStrap *const bootstrap[] = {
#if SDL_AUDIO_DRIVER_DUMMY
&DUMMYAUD_bootstrap,
#endif
#if SDL_AUDIO_DRIVER_DC
&DCAUD_bootstrap,
#endif
#if SDL_AUDIO_DRIVER_MMEAUDIO
&MMEAUDIO_bootstrap,
#endif

View file

@ -1,245 +0,0 @@
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2009 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_dcaudio.h"
#include "aica.h"
#include <dc/spu.h>
#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_PlayDevice(_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_GetDeviceBuf(_THIS)
{
return (this->hidden->mixbuf);
}
/* This function waits until it is possible to write a full sound buffer */
static void
DCAUD_WaitDevice(_THIS)
{
if (this->hidden->playing) {
/* wait */
while (aica_get_pos(0) / this->spec.samples == this->hidden->nextbuf) {
thd_pass();
}
}
}
static void
DCAUD_CloseDevice(_THIS)
{
if (this->hidden != NULL) {
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;
}
SDL_free(this->hidden);
this->hidden = NULL;
/* !!! FIXME: is there a reverse of spu_init()? */
}
}
static int
DCAUD_OpenDevice(_THIS, SDL_AudioSpec * spec)
{
SDL_AudioFormat test_format = SDL_FirstAudioFormat(spec->format);
int valid_datatype = 0;
/* Initialize all variables that we clean on shutdown */
this->hidden = (struct SDL_PrivateAudioData *)
SDL_malloc((sizeof *this->hidden));
if (this->hidden == NULL) {
SDL_OutOfMemory();
return 0;
}
SDL_memset(this->hidden, 0, (sizeof *this->hidden));
spu_init();
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... */
DCAUD_CloseDevice(this);
SDL_SetError("Unsupported audio format");
return 0;
}
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) {
DCAUD_CloseDevice(this);
SDL_OutOfMemory();
return 0;
}
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 1;
}
static int
DCAUD_Init(SDL_AudioDriverImpl * impl)
{
/* Set the function pointers */
impl->OpenDevice = DCAUD_OpenDevice;
impl->PlayDevice = DCAUD_PlayDevice;
impl->WaitDevice = DCAUD_WaitDevice;
impl->GetDeviceBuf = DCAUD_GetDeviceBuf;
impl->CloseDevice = DCAUD_CloseDevice;
impl->OnlyHasDefaultOutputDevice = 1;
return 1;
}
AudioBootStrap DCAUD_bootstrap = {
"dcaudio", "Dreamcast AICA audio", DCAUD_Init, 0
};
/* vi: set ts=4 sw=4 expandtab: */

View file

@ -1,43 +0,0 @@
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2009 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"
#ifndef _SDL_dcaudio_h
#define _SDL_dcaudio_h
#include "../SDL_sysaudio.h"
/* Hidden "this" pointer for the audio functions */
#define _THIS SDL_AudioDevice *this
struct SDL_PrivateAudioData
{
/* The file descriptor for the audio device */
Uint8 *mixbuf;
Uint32 mixlen;
int playing;
int leftpos, rightpos;
int nextbuf;
};
#endif /* _SDL_dcaudio_h */
/* vi: set ts=4 sw=4 expandtab: */

View file

@ -1,301 +0,0 @@
/* This file is part of the Dreamcast function library.
* Please see libdream.c for further details.
*
* (c)2000 Dan Potter
* modify BERO
*/
#include "aica.h"
#include <arch/irq.h>
#include <dc/spu.h>
#if 0
#define dc_snd_base ((volatile unsigned char *)0x00800000) /* arm side */
#endif
#define dc_snd_base ((volatile unsigned char *)0xa0700000) /* dc side */
/* Some convienence macros */
#define SNDREGADDR(x) (0xa0700000 + (x))
#define CHNREGADDR(ch,x) SNDREGADDR(0x80*(ch)+(x))
#define SNDREG32(x) (*(volatile unsigned long *)SNDREGADDR(x))
#define SNDREG8(x) (*(volatile unsigned char *)SNDREGADDR(x))
#define CHNREG32(ch, x) (*(volatile unsigned long *)CHNREGADDR(ch,x))
#define CHNREG8(ch, x) (*(volatile unsigned long *)CHNREGADDR(ch,x))
#define G2_LOCK(OLD) \
do { \
if (!irq_inside_int()) \
OLD = irq_disable(); \
/* suspend any G2 DMA here... */ \
while((*(volatile unsigned int *)0xa05f688c) & 0x20) \
; \
} while(0)
#define G2_UNLOCK(OLD) \
do { \
/* resume any G2 DMA here... */ \
if (!irq_inside_int()) \
irq_restore(OLD); \
} while(0)
void
aica_init()
{
int i, j, old = 0;
/* Initialize AICA channels */
G2_LOCK(old);
SNDREG32(0x2800) = 0x0000;
for (i = 0; i < 64; i++) {
for (j = 0; j < 0x80; j += 4) {
if ((j & 31) == 0)
g2_fifo_wait();
CHNREG32(i, j) = 0;
}
g2_fifo_wait();
CHNREG32(i, 0) = 0x8000;
CHNREG32(i, 20) = 0x1f;
}
SNDREG32(0x2800) = 0x000f;
g2_fifo_wait();
G2_UNLOCK(old);
}
/* Translates a volume from linear form to logarithmic form (required by
the AICA chip */
/* int logs[] = {
0, 40, 50, 58, 63, 68, 73, 77, 80, 83, 86, 89, 92, 94, 97, 99, 101, 103,
105, 107, 109, 111, 112, 114, 116, 117, 119, 120, 122, 123, 125, 126, 127,
129, 130, 131, 133, 134, 135, 136, 137, 139, 140, 141, 142, 143, 144, 145,
146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 156, 157, 158, 159,
160, 161, 162, 162, 163, 164, 165, 166, 166, 167, 168, 169, 170, 170, 171,
172, 172, 173, 174, 175, 175, 176, 177, 177, 178, 179, 180, 180, 181, 182,
182, 183, 183, 184, 185, 185, 186, 187, 187, 188, 188, 189, 190, 190, 191,
191, 192, 193, 193, 194, 194, 195, 196, 196, 197, 197, 198, 198, 199, 199,
200, 201, 201, 202, 202, 203, 203, 204, 204, 205, 205, 206, 206, 207, 207,
208, 208, 209, 209, 210, 210, 211, 211, 212, 212, 213, 213, 214, 214, 215,
215, 216, 216, 217, 217, 217, 218, 218, 219, 219, 220, 220, 221, 221, 222,
222, 222, 223, 223, 224, 224, 225, 225, 225, 226, 226, 227, 227, 228, 228,
228, 229, 229, 230, 230, 230, 231, 231, 232, 232, 232, 233, 233, 234, 234,
234, 235, 235, 236, 236, 236, 237, 237, 238, 238, 238, 239, 239, 240, 240,
240, 241, 241, 241, 242, 242, 243, 243, 243, 244, 244, 244, 245, 245, 245,
246, 246, 247, 247, 247, 248, 248, 248, 249, 249, 249, 250, 250, 250, 251,
251, 251, 252, 252, 252, 253, 253, 253, 254, 254, 254, 255
}; */
const static unsigned char logs[] = {
0, 15, 22, 27, 31, 35, 39, 42, 45, 47, 50, 52, 55, 57, 59, 61,
63, 65, 67, 69, 71, 73, 74, 76, 78, 79, 81, 82, 84, 85, 87, 88,
90, 91, 92, 94, 95, 96, 98, 99, 100, 102, 103, 104, 105, 106,
108, 109, 110, 111, 112, 113, 114, 116, 117, 118, 119, 120, 121,
122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134,
135, 136, 137, 138, 138, 139, 140, 141, 142, 143, 144, 145, 146,
146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 156,
157, 158, 159, 160, 160, 161, 162, 163, 164, 164, 165, 166, 167,
167, 168, 169, 170, 170, 171, 172, 173, 173, 174, 175, 176, 176,
177, 178, 178, 179, 180, 181, 181, 182, 183, 183, 184, 185, 185,
186, 187, 187, 188, 189, 189, 190, 191, 191, 192, 193, 193, 194,
195, 195, 196, 197, 197, 198, 199, 199, 200, 200, 201, 202, 202,
203, 204, 204, 205, 205, 206, 207, 207, 208, 209, 209, 210, 210,
211, 212, 212, 213, 213, 214, 215, 215, 216, 216, 217, 217, 218,
219, 219, 220, 220, 221, 221, 222, 223, 223, 224, 224, 225, 225,
226, 227, 227, 228, 228, 229, 229, 230, 230, 231, 232, 232, 233,
233, 234, 234, 235, 235, 236, 236, 237, 237, 238, 239, 239, 240,
240, 241, 241, 242, 242, 243, 243, 244, 244, 245, 245, 246, 246,
247, 247, 248, 248, 249, 249, 250, 250, 251, 251, 252, 252, 253, 254, 255
};
/* For the moment this is going to have to suffice, until we really
figure out what these mean. */
#define AICA_PAN(x) ((x)==0x80?(0):((x)<0x80?(0x1f):(0x0f)))
#define AICA_VOL(x) (0xff - logs[128 + (((x) & 0xff) / 2)])
//#define AICA_VOL(x) (0xff - logs[x&255])
static inline unsigned
AICA_FREQ(unsigned freq)
{
unsigned long freq_lo, freq_base = 5644800;
int freq_hi = 7;
/* Need to convert frequency to floating point format
(freq_hi is exponent, freq_lo is mantissa)
Formula is ferq = 44100*2^freq_hi*(1+freq_lo/1024) */
while (freq < freq_base && freq_hi > -8) {
freq_base >>= 1;
--freq_hi;
}
while (freq < freq_base && freq_hi > -8) {
freq_base >>= 1;
freq_hi--;
}
freq_lo = (freq << 10) / freq_base;
return (freq_hi << 11) | (freq_lo & 1023);
}
/* Sets up a sound channel completely. This is generally good if you want
a quick and dirty way to play notes. If you want a more comprehensive
set of routines (more like PC wavetable cards) see below.
ch is the channel to play on (0 - 63)
smpptr is the pointer to the sound data; if you're running off the
SH4, then this ought to be (ptr - 0xa0800000); otherwise it's just
ptr. Basically, it's an offset into sound ram.
mode is one of the mode constants (16 bit, 8 bit, ADPCM)
nsamp is the number of samples to play (not number of bytes!)
freq is the sampling rate of the sound
vol is the volume, 0 to 0xff (0xff is louder)
pan is a panning constant -- 0 is left, 128 is center, 255 is right.
This routine (and the similar ones) owe a lot to Marcus' sound example --
I hadn't gotten quite this far into dissecting the individual regs yet. */
void
aica_play(int ch, int mode, unsigned long smpptr, int loopst, int loopend,
int freq, int vol, int pan, int loopflag)
{
/* int i;
*/
int val;
int old = 0;
/* Stop the channel (if it's already playing) */
aica_stop(ch);
/* doesn't seem to be needed, but it's here just in case */
/*
for (i=0; i<256; i++) {
asm("nop");
asm("nop");
asm("nop");
asm("nop");
}
*/
G2_LOCK(old);
/* Envelope setup. The first of these is the loop point,
e.g., where the sample starts over when it loops. The second
is the loop end. This is the full length of the sample when
you are not looping, or the loop end point when you are (though
storing more than that is a waste of memory if you're not doing
volume enveloping). */
CHNREG32(ch, 8) = loopst & 0xffff;
CHNREG32(ch, 12) = loopend & 0xffff;
/* Write resulting values */
CHNREG32(ch, 24) = AICA_FREQ(freq);
/* Set volume, pan, and some other things that we don't know what
they do =) */
CHNREG32(ch, 36) = AICA_PAN(pan) | (0xf << 8);
/* Convert the incoming volume and pan into hardware values */
/* Vol starts at zero so we can ramp */
vol = AICA_VOL(vol);
CHNREG32(ch, 40) = 0x24 | (vol << 8);
/* Convert the incoming volume and pan into hardware values */
/* Vol starts at zero so we can ramp */
/* If we supported volume envelopes (which we don't yet) then
this value would set that up. The top 4 bits determine the
envelope speed. f is the fastest, 1 is the slowest, and 0
seems to be an invalid value and does weird things). The
default (below) sets it into normal mode (play and terminate/loop).
CHNREG32(ch, 16) = 0xf010;
*/
CHNREG32(ch, 16) = 0x1f; /* No volume envelope */
/* Set sample format, buffer address, and looping control. If
0x0200 mask is set on reg 0, the sample loops infinitely. If
it's not set, the sample plays once and terminates. We'll
also set the bits to start playback here. */
CHNREG32(ch, 4) = smpptr & 0xffff;
val = 0xc000 | 0x0000 | (mode << 7) | (smpptr >> 16);
if (loopflag)
val |= 0x200;
CHNREG32(ch, 0) = val;
G2_UNLOCK(old);
/* Enable playback */
/* CHNREG32(ch, 0) |= 0xc000; */
g2_fifo_wait();
#if 0
for (i = 0xff; i >= vol; i--) {
if ((i & 7) == 0)
g2_fifo_wait();
CHNREG32(ch, 40) = 0x24 | (i << 8);;
}
g2_fifo_wait();
#endif
}
/* Stop the sound on a given channel */
void
aica_stop(int ch)
{
g2_write_32(CHNREGADDR(ch, 0),
(g2_read_32(CHNREGADDR(ch, 0)) & ~0x4000) | 0x8000);
g2_fifo_wait();
}
/* The rest of these routines can change the channel in mid-stride so you
can do things like vibrato and panning effects. */
/* Set channel volume */
void
aica_vol(int ch, int vol)
{
// g2_write_8(CHNREGADDR(ch, 41),AICA_VOL(vol));
g2_write_32(CHNREGADDR(ch, 40),
(g2_read_32(CHNREGADDR(ch, 40)) & 0xffff00ff) |
(AICA_VOL(vol) << 8));
g2_fifo_wait();
}
/* Set channel pan */
void
aica_pan(int ch, int pan)
{
// g2_write_8(CHNREGADDR(ch, 36),AICA_PAN(pan));
g2_write_32(CHNREGADDR(ch, 36),
(g2_read_32(CHNREGADDR(ch, 36)) & 0xffffff00) |
(AICA_PAN(pan)));
g2_fifo_wait();
}
/* Set channel frequency */
void
aica_freq(int ch, int freq)
{
g2_write_32(CHNREGADDR(ch, 24), AICA_FREQ(freq));
g2_fifo_wait();
}
/* Get channel position */
int
aica_get_pos(int ch)
{
#if 1
/* Observe channel ch */
g2_write_32(SNDREGADDR(0x280c),
(g2_read_32(SNDREGADDR(0x280c)) & 0xffff00ff) | (ch << 8));
g2_fifo_wait();
/* Update position counters */
return g2_read_32(SNDREGADDR(0x2814)) & 0xffff;
#else
/* Observe channel ch */
g2_write_8(SNDREGADDR(0x280d), ch);
/* Update position counters */
return g2_read_32(SNDREGADDR(0x2814)) & 0xffff;
#endif
}
/* vi: set ts=4 sw=4 expandtab: */

View file

@ -1,42 +0,0 @@
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2009 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"
#ifndef _AICA_H_
#define _AICA_H_
#define AICA_MEM 0xa0800000
#define SM_8BIT 1
#define SM_16BIT 0
#define SM_ADPCM 2
void aica_play(int ch, int mode, unsigned long smpptr, int looptst,
int loopend, int freq, int vol, int pan, int loopflag);
void aica_stop(int ch);
void aica_vol(int ch, int vol);
void aica_pan(int ch, int pan);
void aica_freq(int ch, int freq);
int aica_get_pos(int ch);
#endif
/* vi: set ts=4 sw=4 expandtab: */