sdl-ios-xcode: src/audio/mint/SDL

annotate src/audio/mint/SDL_mintaudio.c @ 4001:6831b8723a85 SDL-1.2

Don't initialize the audio buffer passed to the application's audio callback, since they are expected to entirely fill it with data or silence. For legacy apps that might expect the buffer to already have silence and thus may not fill the buffer in the callback, there's an environment variable to expose the old behaviour. Fixes Bugzilla #416.

author	Ryan C. Gordon <icculus@icculus.org>
date	Thu, 05 Jul 2007 02:24:36 +0000
parents	e958a003b69b
children	a1b03ba2fcd0

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>
3865 e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	35 #include <mint/cookie.h>
398 d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	36
d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	37 #include "SDL_audio.h"
d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	38 #include "SDL_mintaudio.h"
644 594422ab8f9f Atari MiNT: added more audio drivers Patrice Mandin <patmandin@gmail.com> parents: 557 diff changeset	39 #include "SDL_mintaudio_stfa.h"
398 d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	40
644 594422ab8f9f Atari MiNT: added more audio drivers Patrice Mandin <patmandin@gmail.com> parents: 557 diff changeset	41 /* The audio device */
398 d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	42
644 594422ab8f9f Atari MiNT: added more audio drivers Patrice Mandin <patmandin@gmail.com> parents: 557 diff changeset	43 SDL_AudioDevice *SDL_MintAudio_device;
594422ab8f9f Atari MiNT: added more audio drivers Patrice Mandin <patmandin@gmail.com> parents: 557 diff changeset	44 Uint8 SDL_MintAudio_audiobuf[2]; / Pointers to buffers */
704 c4803992e09c Small bugfixes Patrice Mandin <patmandin@gmail.com> parents: 644 diff changeset	45 unsigned long SDL_MintAudio_audiosize; /* Length of audio buffer=spec->size */
1819 63a45a87a57e Forgot to declare volatile stuff also in c file Patrice Mandin <patmandin@gmail.com> parents: 1402 diff changeset	46 volatile unsigned short SDL_MintAudio_numbuf; /* Buffer to play */
63a45a87a57e Forgot to declare volatile stuff also in c file Patrice Mandin <patmandin@gmail.com> parents: 1402 diff changeset	47 volatile unsigned short SDL_MintAudio_mutex;
63a45a87a57e Forgot to declare volatile stuff also in c file Patrice Mandin <patmandin@gmail.com> parents: 1402 diff changeset	48 volatile unsigned long SDL_MintAudio_clocktics;
644 594422ab8f9f Atari MiNT: added more audio drivers Patrice Mandin <patmandin@gmail.com> parents: 557 diff changeset	49 cookie_stfa_t *SDL_MintAudio_stfa;
3865 e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	50 unsigned short SDL_MintAudio_hasfpu;
398 d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	51
1111 12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	52 /* 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	53 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	54 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	55 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	56 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	57
644 594422ab8f9f Atari MiNT: added more audio drivers Patrice Mandin <patmandin@gmail.com> parents: 557 diff changeset	58 /* 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	59
d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	60 void SDL_MintAudio_Callback(void)
d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	61 {
d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	62 Uint8 *buffer;
1034 2eca15c3f609 clear convert.buf before filling it Patrice Mandin <patmandin@gmail.com> parents: 961 diff changeset	63 SDL_AudioDevice *audio = SDL_MintAudio_device;
398 d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	64
d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	65 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
1336 3692456e7b0f Use SDL_ prefixed versions of C library functions. Sam Lantinga <slouken@libsdl.org> parents: 1116 diff changeset	66 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	67
2eca15c3f609 clear convert.buf before filling it Patrice Mandin <patmandin@gmail.com> parents: 961 diff changeset	68 if (audio->paused)
2eca15c3f609 clear convert.buf before filling it Patrice Mandin <patmandin@gmail.com> parents: 961 diff changeset	69 return;
2eca15c3f609 clear convert.buf before filling it Patrice Mandin <patmandin@gmail.com> parents: 961 diff changeset	70
2eca15c3f609 clear convert.buf before filling it Patrice Mandin <patmandin@gmail.com> parents: 961 diff changeset	71 if (audio->convert.needed) {
2eca15c3f609 clear convert.buf before filling it Patrice Mandin <patmandin@gmail.com> parents: 961 diff changeset	72 int silence;
398 d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	73
1034 2eca15c3f609 clear convert.buf before filling it Patrice Mandin <patmandin@gmail.com> parents: 961 diff changeset	74 if ( audio->convert.src_format == AUDIO_U8 ) {
2eca15c3f609 clear convert.buf before filling it Patrice Mandin <patmandin@gmail.com> parents: 961 diff changeset	75 silence = 0x80;
398 d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	76 } else {
1034 2eca15c3f609 clear convert.buf before filling it Patrice Mandin <patmandin@gmail.com> parents: 961 diff changeset	77 silence = 0;
398 d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	78 }
1336 3692456e7b0f Use SDL_ prefixed versions of C library functions. Sam Lantinga <slouken@libsdl.org> parents: 1116 diff changeset	79 SDL_memset(audio->convert.buf, silence, audio->convert.len);
1034 2eca15c3f609 clear convert.buf before filling it Patrice Mandin <patmandin@gmail.com> parents: 961 diff changeset	80 audio->spec.callback(audio->spec.userdata,
2eca15c3f609 clear convert.buf before filling it Patrice Mandin <patmandin@gmail.com> parents: 961 diff changeset	81 (Uint8 *)audio->convert.buf,audio->convert.len);
2eca15c3f609 clear convert.buf before filling it Patrice Mandin <patmandin@gmail.com> parents: 961 diff changeset	82 SDL_ConvertAudio(&audio->convert);
1336 3692456e7b0f Use SDL_ prefixed versions of C library functions. Sam Lantinga <slouken@libsdl.org> parents: 1116 diff changeset	83 SDL_memcpy(buffer, audio->convert.buf, audio->convert.len_cvt);
1034 2eca15c3f609 clear convert.buf before filling it Patrice Mandin <patmandin@gmail.com> parents: 961 diff changeset	84 } else {
2eca15c3f609 clear convert.buf before filling it Patrice Mandin <patmandin@gmail.com> parents: 961 diff changeset	85 audio->spec.callback(audio->spec.userdata, buffer, audio->spec.size);
398 d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	86 }
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 */
1107 856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output Patrice Mandin <patmandin@gmail.com> parents: 1034 diff changeset	90 void SDL_MintAudio_AddFrequency(_THIS, Uint32 frequency, Uint32 clock,
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output Patrice Mandin <patmandin@gmail.com> parents: 1034 diff changeset	91 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	92 {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	93 int i, p;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	94
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	95 if (MINTAUDIO_freqcount==MINTAUDIO_maxfreqs) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	96 return;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	97 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	98
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	99 /* Search where to insert the frequency (highest first) */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	100 for (p=0; p<MINTAUDIO_freqcount; p++) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	101 if (frequency > MINTAUDIO_frequencies[p].frequency) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	102 break;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	103 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	104 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	105
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	106 /* Put all following ones farer */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	107 if (MINTAUDIO_freqcount>0) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	108 for (i=MINTAUDIO_freqcount; i>p; i--) {
1336 3692456e7b0f Use SDL_ prefixed versions of C library functions. Sam Lantinga <slouken@libsdl.org> parents: 1116 diff changeset	109 SDL_memcpy(&MINTAUDIO_frequencies[i], &MINTAUDIO_frequencies[i-1], sizeof(mint_frequency_t));
961 185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	110 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	111 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	112
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	113 /* And insert new one */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	114 MINTAUDIO_frequencies[p].frequency = frequency;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	115 MINTAUDIO_frequencies[p].masterclock = clock;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	116 MINTAUDIO_frequencies[p].predivisor = prediv;
1107 856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output Patrice Mandin <patmandin@gmail.com> parents: 1034 diff changeset	117 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	118
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	119 MINTAUDIO_freqcount++;
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	120 }
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	121
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	122 /* Search for the nearest frequency */
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	123 int SDL_MintAudio_SearchFrequency(_THIS, int desired_freq)
398 d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	124 {
d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	125 int i;
d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	126
644 594422ab8f9f Atari MiNT: added more audio drivers Patrice Mandin <patmandin@gmail.com> parents: 557 diff changeset	127 /* Only 1 freq ? */
961 185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	128 if (MINTAUDIO_freqcount==1) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	129 return 0;
398 d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	130 }
d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	131
644 594422ab8f9f Atari MiNT: added more audio drivers Patrice Mandin <patmandin@gmail.com> parents: 557 diff changeset	132 /* Check the array */
961 185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	133 for (i=0; i<MINTAUDIO_freqcount; i++) {
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	134 if (desired_freq >= ((MINTAUDIO_frequencies[i].frequency+
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	135 MINTAUDIO_frequencies[i+1].frequency)>>1)) {
644 594422ab8f9f Atari MiNT: added more audio drivers Patrice Mandin <patmandin@gmail.com> parents: 557 diff changeset	136 return i;
398 d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	137 }
d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	138 }
d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	139
644 594422ab8f9f Atari MiNT: added more audio drivers Patrice Mandin <patmandin@gmail.com> parents: 557 diff changeset	140 /* Not in the array, give the latest */
961 185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	141 return MINTAUDIO_freqcount-1;
398 d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	142 }
1111 12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	143
3865 e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	144 /* Check if FPU is present */
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	145 void SDL_MintAudio_CheckFpu(void)
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	146 {
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	147 unsigned long cookie_fpu;
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	148
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	149 SDL_MintAudio_hasfpu = 0;
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	150 if (Getcookie(C__FPU, &cookie_fpu) != C_FOUND) {
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	151 return;
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	152 }
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	153 switch ((cookie_fpu>>16)&0xfffe) {
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	154 case 2:
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	155 case 4:
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	156 case 6:
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	157 case 8:
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	158 case 16:
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	159 SDL_MintAudio_hasfpu = 1;
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	160 break;
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	161 }
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	162 }
e958a003b69b Add function to check FPU presence Patrice Mandin <patmandin@gmail.com> parents: 1819 diff changeset	163
1111 12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	164 /* The thread function, used under MiNT with xbios */
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	165 int SDL_MintAudio_Thread(long param)
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	166 {
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	167 SndBufPtr pointers;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	168 SDL_bool buffers_filled[2] = {SDL_FALSE, SDL_FALSE};
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	169
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	170 SDL_MintAudio_thread_finished = SDL_FALSE;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	171 while (!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	172 if (Buffptr(&pointers)!=0)
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	173 continue;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	174
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	175 if (( (unsigned long)pointers.play>=(unsigned long)SDL_MintAudio_audiobuf[0])
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	176 && ( (unsigned long)pointers.play<=(unsigned long)SDL_MintAudio_audiobuf[1]))
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	177 {
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	178 /* DMA is reading buffer #0, setup buffer #1 if not already done */
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	179 if (!buffers_filled[1]) {
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	180 SDL_MintAudio_numbuf = 1;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	181 SDL_MintAudio_Callback();
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	182 Setbuffer(0, SDL_MintAudio_audiobuf[1], SDL_MintAudio_audiobuf[1] + SDL_MintAudio_audiosize);
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	183 buffers_filled[1]=SDL_TRUE;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	184 buffers_filled[0]=SDL_FALSE;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	185 }
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	186 } else {
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	187 /* DMA is reading buffer #1, setup buffer #0 if not already done */
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	188 if (!buffers_filled[0]) {
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	189 SDL_MintAudio_numbuf = 0;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	190 SDL_MintAudio_Callback();
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	191 Setbuffer(0, SDL_MintAudio_audiobuf[0], SDL_MintAudio_audiobuf[0] + SDL_MintAudio_audiosize);
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	192 buffers_filled[0]=SDL_TRUE;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	193 buffers_filled[1]=SDL_FALSE;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	194 }
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	195 }
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	196
1116 080ed9ef0609 Sleep a bit less in thread Patrice Mandin <patmandin@gmail.com> parents: 1111 diff changeset	197 usleep(100);
1111 12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	198 }
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	199 SDL_MintAudio_thread_finished = SDL_TRUE;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	200 return 0;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	201 }
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	202
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	203 void SDL_MintAudio_WaitThread(void)
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	204 {
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	205 if (!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	206 return;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	207
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	208 if (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	209 return;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	210
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	211 SDL_MintAudio_quit_thread = SDL_TRUE;
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	212 while (!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	213 Syield();
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	214 }
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	215 }

Mercurial > sdl-ios-xcode

annotate src/audio/mint/SDL_mintaudio.c @ 4001:6831b8723a85 SDL-1.2