Mercurial > sdl-ios-xcode

annotate src/audio/mint/SDL_mintaudio.c @ 1663:11775724e3fe SDL-1.3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
fine tuning indent output
author Sam Lantinga <slouken@libsdl.org>
date Sun, 28 May 2006 13:29:03 +0000
parents 782fd950bd46
children 4da1ee79c9af
rev   line source
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
1 /*
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
2 SDL - Simple DirectMedia Layer
769
b8d311d90021 Updated copyright information for 2004 (Happy New Year!)
Sam Lantinga <slouken@libsdl.org>
parents: 704
diff changeset
3 Copyright (C) 1997-2004 Sam Lantinga
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
4
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
5 This library is free software; you can redistribute it and/or
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
6 modify it under the terms of the GNU Library General Public
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
7 License as published by the Free Software Foundation; either
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
8 version 2 of the License, or (at your option) any later version.
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
9
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
10 This library is distributed in the hope that it will be useful,
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
13 Library General Public License for more details.
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
14
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
15 You should have received a copy of the GNU Library General Public
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
16 License along with this library; if not, write to the Free
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
18
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
19 Sam Lantinga
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
20 slouken@libsdl.org
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
21 */
1402
d910939febfa Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
22 #include "SDL_config.h"
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
23
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
24 /*
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
25 Audio interrupt variables and callback function
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
26
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
27 Patrice Mandin
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
28 */
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
29
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
30 #include <unistd.h>
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
31
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
32 #include <mint/osbind.h>
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
33 #include <mint/falcon.h>
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
34 #include <mint/mintbind.h>
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
35
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
36 #include "SDL_audio.h"
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
37 #include "SDL_mintaudio.h"
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
38 #include "SDL_mintaudio_stfa.h"
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
39
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
40 /* The audio device */
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
41
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
42 SDL_AudioDevice *SDL_MintAudio_device;
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
43 Uint8 *SDL_MintAudio_audiobuf[2]; /* Pointers to buffers */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
44 unsigned long SDL_MintAudio_audiosize; /* Length of audio buffer=spec->size */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
45 volatile unsigned short SDL_MintAudio_numbuf; /* Buffer to play */
1659
14717b52abc0 Merge trunk-1.3-3
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
46 volatile unsigned short SDL_MintAudio_mutex;
14717b52abc0 Merge trunk-1.3-3
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
47 volatile unsigned long SDL_MintAudio_clocktics;
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
48 cookie_stfa_t *SDL_MintAudio_stfa;
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
49
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
50 /* MiNT thread variables */
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
51 SDL_bool SDL_MintAudio_mint_present;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
52 SDL_bool SDL_MintAudio_quit_thread;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
53 SDL_bool SDL_MintAudio_thread_finished;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
54 long SDL_MintAudio_thread_pid;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
55
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents: 557
diff changeset
56 /* The callback function, called by each driver whenever needed */
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
57
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
58 void
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
59 SDL_MintAudio_Callback (void)
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
60 {
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
61 Uint8 *buffer;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
62 SDL_AudioDevice *audio = SDL_MintAudio_device;
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
63
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
64 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
65 SDL_memset (buffer, audio->spec.silence, audio->spec.size);
1034
2eca15c3f609 clear convert.buf before filling it
Patrice Mandin <patmandin@gmail.com>
parents: 961
diff changeset
66
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
67 if (audio->paused)
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
68 return;
1034
2eca15c3f609 clear convert.buf before filling it
Patrice Mandin <patmandin@gmail.com>
parents: 961
diff changeset
69
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
70 if (audio->convert.needed) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
71 int silence;
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
72
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
73 if (audio->convert.src_format == AUDIO_U8) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
74 silence = 0x80;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
75 } else {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
76 silence = 0;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
77 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
78 SDL_memset (audio->convert.buf, silence, audio->convert.len);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
79 audio->spec.callback (audio->spec.userdata,
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
80 (Uint8 *) audio->convert.buf,
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
81 audio->convert.len);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
82 SDL_ConvertAudio (&audio->convert);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
83 SDL_memcpy (buffer, audio->convert.buf, audio->convert.len_cvt);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
84 } else {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
85 audio->spec.callback (audio->spec.userdata, buffer, audio->spec.size);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
86 }
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
87 }
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
88
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
89 /* Add a new frequency/clock/predivisor to the current list */
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
90 void
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
91 SDL_MintAudio_AddFrequency (_THIS, Uint32 frequency, Uint32 clock,
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
92 Uint32 prediv, int gpio_bits)
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
93 {
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
94 int i, p;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
95
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
96 if (MINTAUDIO_freqcount == MINTAUDIO_maxfreqs) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
97 return;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
98 }
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
99
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
100 /* Search where to insert the frequency (highest first) */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
101 for (p = 0; p < MINTAUDIO_freqcount; p++) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
102 if (frequency > MINTAUDIO_frequencies[p].frequency) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
103 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
104 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
105 }
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
106
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
107 /* Put all following ones farer */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
108 if (MINTAUDIO_freqcount > 0) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
109 for (i = MINTAUDIO_freqcount; i > p; i--) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
110 SDL_memcpy (&MINTAUDIO_frequencies[i],
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
111 &MINTAUDIO_frequencies[i - 1],
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
112 sizeof (mint_frequency_t));
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
113 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
114 }
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
115
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
116 /* And insert new one */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
117 MINTAUDIO_frequencies[p].frequency = frequency;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
118 MINTAUDIO_frequencies[p].masterclock = clock;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
119 MINTAUDIO_frequencies[p].predivisor = prediv;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
120 MINTAUDIO_frequencies[p].gpio_bits = gpio_bits;
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
121
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
122 MINTAUDIO_freqcount++;
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
123 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
124
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
125 /* Search for the nearest frequency */
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
126 int
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
127 SDL_MintAudio_SearchFrequency (_THIS, int desired_freq)
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
128 {
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
129 int i;
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
130
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
131 /* Only 1 freq ? */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
132 if (MINTAUDIO_freqcount == 1) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
133 return 0;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
134 }
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
135
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
136 /* Check the array */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
137 for (i = 0; i < MINTAUDIO_freqcount; i++) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
138 if (desired_freq >= ((MINTAUDIO_frequencies[i].frequency +
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
139 MINTAUDIO_frequencies[i + 1].frequency) >> 1)) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
140 return i;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
141 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
142 }
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
143
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
144 /* Not in the array, give the latest */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
145 return MINTAUDIO_freqcount - 1;
398
d219b0e02f5f Added Atari audio support (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
146 }
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
147
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
148 /* The thread function, used under MiNT with xbios */
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
149 int
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
150 SDL_MintAudio_Thread (long param)
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
151 {
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
152 SndBufPtr pointers;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
153 SDL_bool buffers_filled[2] = { SDL_FALSE, SDL_FALSE };
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
154
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
155 SDL_MintAudio_thread_finished = SDL_FALSE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
156 while (!SDL_MintAudio_quit_thread) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
157 if (Buffptr (&pointers) != 0)
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
158 continue;
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
159
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
160 if (((unsigned long) pointers.play >=
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
161 (unsigned long) SDL_MintAudio_audiobuf[0])
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
162 && ((unsigned long) pointers.play <=
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
163 (unsigned long) SDL_MintAudio_audiobuf[1])) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
164 /* DMA is reading buffer #0, setup buffer #1 if not already done */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
165 if (!buffers_filled[1]) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
166 SDL_MintAudio_numbuf = 1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
167 SDL_MintAudio_Callback ();
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
168 Setbuffer (0, SDL_MintAudio_audiobuf[1],
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
169 SDL_MintAudio_audiobuf[1] +
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
170 SDL_MintAudio_audiosize);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
171 buffers_filled[1] = SDL_TRUE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
172 buffers_filled[0] = SDL_FALSE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
173 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
174 } else {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
175 /* DMA is reading buffer #1, setup buffer #0 if not already done */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
176 if (!buffers_filled[0]) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
177 SDL_MintAudio_numbuf = 0;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
178 SDL_MintAudio_Callback ();
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
179 Setbuffer (0, SDL_MintAudio_audiobuf[0],
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
180 SDL_MintAudio_audiobuf[0] +
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
181 SDL_MintAudio_audiosize);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
182 buffers_filled[0] = SDL_TRUE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
183 buffers_filled[1] = SDL_FALSE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
184 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
185 }
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
186
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
187 usleep (100);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
188 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
189 SDL_MintAudio_thread_finished = SDL_TRUE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
190 return 0;
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
191 }
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
192
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
193 void
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
194 SDL_MintAudio_WaitThread (void)
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
195 {
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
196 if (!SDL_MintAudio_mint_present)
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
197 return;
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
198
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
199 if (SDL_MintAudio_thread_finished)
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
200 return;
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
201
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
202 SDL_MintAudio_quit_thread = SDL_TRUE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
203 while (!SDL_MintAudio_thread_finished) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
204 Syield ();
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
205 }
1111
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt
Patrice Mandin <patmandin@gmail.com>
parents: 1107
diff changeset
206 }
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
207
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1659
diff changeset
208 /* vi: set ts=4 sw=4 expandtab: */