Mercurial > sdl-ios-xcode

annotate src/audio/dc/SDL_dcaudio.c @ 3852:5b5e549382b3 SDL-1.2

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Removed some new 1.3 symbols from code backported to 1.2.
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 03 Sep 2006 21:34:11 +0000
parents 405a192b68e7
children a1b03ba2fcd0
rev   line source
509
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
1 /*
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
2 SDL - Simple DirectMedia Layer
1312
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
3 Copyright (C) 1997-2006 Sam Lantinga
509
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
4
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
5 This library is free software; you can redistribute it and/or
1312
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
6 modify it under the terms of the GNU Lesser General Public
509
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
7 License as published by the Free Software Foundation; either
1312
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
8 version 2.1 of the License, or (at your option) any later version.
509
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
9
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
10 This library is distributed in the hope that it will be useful,
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
1312
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
13 Lesser General Public License for more details.
509
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
14
1312
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
15 You should have received a copy of the GNU Lesser General Public
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
16 License along with this library; if not, write to the Free Software
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
509
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
18
1312
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
19 Sam Lantinga
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
20 slouken@libsdl.org
509
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
21
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
22 */
1402
d910939febfa Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents: 1361
diff changeset
23 #include "SDL_config.h"
509
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
24
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
25 /* Output dreamcast aica */
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
26
1358
c71e05b4dc2e More header massaging... works great on Windows. ;-)
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
27 #include "SDL_timer.h"
509
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
28 #include "SDL_audio.h"
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
29 #include "../SDL_audiomem.h"
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
30 #include "../SDL_audio_c.h"
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
31 #include "../SDL_audiodev_c.h"
509
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
32 #include "SDL_dcaudio.h"
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
33
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
34 #include "aica.h"
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
35 #include <dc/spu.h>
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
36
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
37 /* Audio driver functions */
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
38 static int DCAUD_OpenAudio(_THIS, SDL_AudioSpec *spec);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
39 static void DCAUD_WaitAudio(_THIS);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
40 static void DCAUD_PlayAudio(_THIS);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
41 static Uint8 *DCAUD_GetAudioBuf(_THIS);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
42 static void DCAUD_CloseAudio(_THIS);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
43
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
44 /* Audio driver bootstrap functions */
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
45 static int DCAUD_Available(void)
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
46 {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
47 return 1;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
48 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
49
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
50 static void DCAUD_DeleteDevice(SDL_AudioDevice *device)
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
51 {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
52 SDL_free(device->hidden);
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
53 SDL_free(device);
509
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
54 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
55
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
56 static SDL_AudioDevice *DCAUD_CreateDevice(int devindex)
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
57 {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
58 SDL_AudioDevice *this;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
59
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
60 /* Initialize all variables that we clean on shutdown */
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
61 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
509
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
62 if ( this ) {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
63 SDL_memset(this, 0, (sizeof *this));
509
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
64 this->hidden = (struct SDL_PrivateAudioData *)
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
65 SDL_malloc((sizeof *this->hidden));
509
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
66 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
67 if ( (this == NULL) || (this->hidden == NULL) ) {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
68 SDL_OutOfMemory();
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
69 if ( this ) {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
70 SDL_free(this);
509
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
71 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
72 return(0);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
73 }
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
74 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
509
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
75
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
76 /* Set the function pointers */
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
77 this->OpenAudio = DCAUD_OpenAudio;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
78 this->WaitAudio = DCAUD_WaitAudio;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
79 this->PlayAudio = DCAUD_PlayAudio;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
80 this->GetAudioBuf = DCAUD_GetAudioBuf;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
81 this->CloseAudio = DCAUD_CloseAudio;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
82
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
83 this->free = DCAUD_DeleteDevice;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
84
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
85 spu_init();
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
86
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
87 return this;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
88 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
89
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
90 AudioBootStrap DCAUD_bootstrap = {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
91 "dcaudio", "Dreamcast AICA audio",
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
92 DCAUD_Available, DCAUD_CreateDevice
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
93 };
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
94
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
95 /* This function waits until it is possible to write a full sound buffer */
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
96 static void DCAUD_WaitAudio(_THIS)
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
97 {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
98 if (this->hidden->playing) {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
99 /* wait */
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
100 while(aica_get_pos(0)/this->spec.samples == this->hidden->nextbuf) {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
101 thd_pass();
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
102 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
103 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
104 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
105
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
106 #define SPU_RAM_BASE 0xa0800000
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
107
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
108 static void spu_memload_stereo8(int leftpos,int rightpos,void *src0,size_t size)
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
109 {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
110 uint8 *src = src0;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
111 uint32 *left = (uint32*)(leftpos +SPU_RAM_BASE);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
112 uint32 *right = (uint32*)(rightpos+SPU_RAM_BASE);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
113 size = (size+7)/8;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
114 while(size--) {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
115 unsigned lval,rval;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
116 lval = *src++;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
117 rval = *src++;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
118 lval|= (*src++)<<8;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
119 rval|= (*src++)<<8;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
120 lval|= (*src++)<<16;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
121 rval|= (*src++)<<16;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
122 lval|= (*src++)<<24;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
123 rval|= (*src++)<<24;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
124 g2_write_32(left++,lval);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
125 g2_write_32(right++,rval);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
126 g2_fifo_wait();
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
127 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
128 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
129
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
130 static void spu_memload_stereo16(int leftpos,int rightpos,void *src0,size_t size)
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
131 {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
132 uint16 *src = src0;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
133 uint32 *left = (uint32*)(leftpos +SPU_RAM_BASE);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
134 uint32 *right = (uint32*)(rightpos+SPU_RAM_BASE);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
135 size = (size+7)/8;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
136 while(size--) {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
137 unsigned lval,rval;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
138 lval = *src++;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
139 rval = *src++;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
140 lval|= (*src++)<<16;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
141 rval|= (*src++)<<16;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
142 g2_write_32(left++,lval);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
143 g2_write_32(right++,rval);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
144 g2_fifo_wait();
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
145 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
146 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
147
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
148 static void DCAUD_PlayAudio(_THIS)
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
149 {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
150 SDL_AudioSpec *spec = &this->spec;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
151 unsigned int offset;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
152
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
153 if (this->hidden->playing) {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
154 /* wait */
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
155 while(aica_get_pos(0)/spec->samples == this->hidden->nextbuf) {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
156 thd_pass();
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
157 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
158 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
159
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
160 offset = this->hidden->nextbuf*spec->size;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
161 this->hidden->nextbuf^=1;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
162 /* Write the audio data, checking for EAGAIN on broken audio drivers */
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
163 if (spec->channels==1) {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
164 spu_memload(this->hidden->leftpos+offset,this->hidden->mixbuf,this->hidden->mixlen);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
165 } else {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
166 offset/=2;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
167 if ((this->spec.format&255)==8) {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
168 spu_memload_stereo8(this->hidden->leftpos+offset,this->hidden->rightpos+offset,this->hidden->mixbuf,this->hidden->mixlen);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
169 } else {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
170 spu_memload_stereo16(this->hidden->leftpos+offset,this->hidden->rightpos+offset,this->hidden->mixbuf,this->hidden->mixlen);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
171 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
172 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
173
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
174 if (!this->hidden->playing) {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
175 int mode;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
176 this->hidden->playing = 1;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
177 mode = (spec->format==AUDIO_S8)?SM_8BIT:SM_16BIT;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
178 if (spec->channels==1) {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
179 aica_play(0,mode,this->hidden->leftpos,0,spec->samples*2,spec->freq,255,128,1);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
180 } else {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
181 aica_play(0,mode,this->hidden->leftpos ,0,spec->samples*2,spec->freq,255,0,1);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
182 aica_play(1,mode,this->hidden->rightpos,0,spec->samples*2,spec->freq,255,255,1);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
183 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
184 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
185 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
186
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
187 static Uint8 *DCAUD_GetAudioBuf(_THIS)
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
188 {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
189 return(this->hidden->mixbuf);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
190 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
191
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
192 static void DCAUD_CloseAudio(_THIS)
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
193 {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
194 aica_stop(0);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
195 if (this->spec.channels==2) aica_stop(1);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
196 if ( this->hidden->mixbuf != NULL ) {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
197 SDL_FreeAudioMem(this->hidden->mixbuf);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
198 this->hidden->mixbuf = NULL;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
199 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
200 }
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
201
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
202 static int DCAUD_OpenAudio(_THIS, SDL_AudioSpec *spec)
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
203 {
3852
5b5e549382b3 Removed some new 1.3 symbols from code backported to 1.2.
Ryan C. Gordon <icculus@icculus.org>
parents: 3851
diff changeset
204 Uint16 test_format = SDL_FirstAudioFormat(spec->format);
3851
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
205 int valid_datatype = 0;
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
206 while ((!valid_datatype) && (test_format)) {
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
207 spec->format = test_format;
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
208 switch (test_format) {
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
209 /* only formats Dreamcast accepts... */
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
210 case AUDIO_S8:
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
211 case AUDIO_S16LSB:
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
212 valid_datatype = 1;
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
213 break;
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
214
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
215 default:
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
216 test_format = SDL_NextAudioFormat();
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
217 break;
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
218 }
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
219 }
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
220
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
221 if (!valid_datatype) { /* shouldn't happen, but just in case... */
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
222 SDL_SetError("Unsupported audio format");
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
223 return (-1);
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
224 }
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
225
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
226 if (spec->channels > 2)
405a192b68e7 Backport from 1.3: most of the audio drivers can now handle data
Ryan C. Gordon <icculus@icculus.org>
parents: 1461
diff changeset
227 spec->channels = 2; /* no more than stereo on the Dreamcast. */
509
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
228
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
229 /* Update the fragment size as size in bytes */
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
230 SDL_CalculateAudioSpec(spec);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
231
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
232 /* Allocate mixing buffer */
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
233 this->hidden->mixlen = spec->size;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
234 this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
235 if ( this->hidden->mixbuf == NULL ) {
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
236 return(-1);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
237 }
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
238 SDL_memset(this->hidden->mixbuf, spec->silence, spec->size);
509
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
239 this->hidden->leftpos = 0x11000;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
240 this->hidden->rightpos = 0x11000+spec->size;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
241 this->hidden->playing = 0;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
242 this->hidden->nextbuf = 0;
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
243
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
244 /* We're ready to rock and roll. :-) */
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
245 return(0);
dad72daf44b3 Added initial support for Dreamcast (thanks HERO!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
246 }