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

annotate src/audio/mint/SDL_mintaudio.c @ 3796:b19680c84cdf SDL-ryan-multiple-audio-device

Bunch of 1.3 audio cleanups to remove FIXMEs, get driver specific crap out of the core and into the drivers where it belongs, and push generic responsibilities out of the drivers and into the core where they belong.

author	Ryan C. Gordon <icculus@icculus.org>
date	Wed, 04 Oct 2006 19:54:23 +0000
parents	adf732f1f016
children	0b24732b1134

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;
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	43 Uint8 SDL_MintAudio_audiobuf[2]; / Pointers to buffers */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	44 unsigned long SDL_MintAudio_audiosize; /* Length of audio buffer=spec->size */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	45 volatile unsigned short SDL_MintAudio_numbuf; /* Buffer to play */
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_mutex;
63a45a87a57e Forgot to declare volatile stuff also in c file Patrice Mandin <patmandin@gmail.com> parents: 1402 diff changeset	47 volatile unsigned long SDL_MintAudio_clocktics;
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 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
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	58 void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	59 SDL_MintAudio_Callback(void)
398 d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	60 {
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	61 Uint8 *buffer;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 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
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	64 buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 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
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	67 if (audio->paused)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	68 return;
1034 2eca15c3f609 clear convert.buf before filling it Patrice Mandin <patmandin@gmail.com> parents: 961 diff changeset	69
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	70 if (audio->convert.needed) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	71 int silence;
398 d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	72
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	73 if (audio->convert.src_format == AUDIO_U8) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	74 silence = 0x80;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	75 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	76 silence = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	77 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	78 SDL_memset(audio->convert.buf, silence, audio->convert.len);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	79 audio->spec.callback(audio->spec.userdata,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	80 (Uint8 *) audio->convert.buf,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	81 audio->convert.len);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	82 SDL_ConvertAudio(&audio->convert);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	83 SDL_memcpy(buffer, audio->convert.buf, audio->convert.len_cvt);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	84 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	85 audio->spec.callback(audio->spec.userdata, buffer, audio->spec.size);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 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 */
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	90 void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	91 SDL_MintAudio_AddFrequency(_THIS, Uint32 frequency, Uint32 clock,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 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 {
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	94 int i, p;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	95
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	96 if (MINTAUDIO_freqcount == MINTAUDIO_maxfreqs) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	97 return;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	98 }
961 185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	99
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	100 /* Search where to insert the frequency (highest first) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	101 for (p = 0; p < MINTAUDIO_freqcount; p++) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	102 if (frequency > MINTAUDIO_frequencies[p].frequency) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	103 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	104 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	105 }
961 185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	106
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	107 /* Put all following ones farer */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	108 if (MINTAUDIO_freqcount > 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	109 for (i = MINTAUDIO_freqcount; i > p; i--) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	110 SDL_memcpy(&MINTAUDIO_frequencies[i],
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	111 &MINTAUDIO_frequencies[i - 1],
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	112 sizeof(mint_frequency_t));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	113 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	114 }
961 185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200 Patrice Mandin <patmandin@gmail.com> parents: 769 diff changeset	115
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	116 /* And insert new one */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	117 MINTAUDIO_frequencies[p].frequency = frequency;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	118 MINTAUDIO_frequencies[p].masterclock = clock;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	119 MINTAUDIO_frequencies[p].predivisor = prediv;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 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
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 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 */
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	126 int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 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 {
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	129 int i;
398 d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	130
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	131 /* Only 1 freq ? */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	132 if (MINTAUDIO_freqcount == 1) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	133 return 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	134 }
398 d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	135
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	136 /* Check the array */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	137 for (i = 0; i < MINTAUDIO_freqcount; i++) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	138 if (desired_freq >= ((MINTAUDIO_frequencies[i].frequency +
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	139 MINTAUDIO_frequencies[i + 1].frequency) >> 1)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	140 return i;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	141 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	142 }
398 d219b0e02f5f Added Atari audio support (thanks Patrice!) Sam Lantinga <slouken@libsdl.org> parents: diff changeset	143
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	144 /* Not in the array, give the latest */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 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
2027 d48ead2d2ba5 Save/restore FPU registers in interrupt Patrice Mandin <patmandin@gmail.com> parents: 1895 diff changeset	148 /* Check if FPU is present */
2043 adf732f1f016 Formatting update Sam Lantinga <slouken@libsdl.org> parents: 2027 diff changeset	149 void
adf732f1f016 Formatting update Sam Lantinga <slouken@libsdl.org> parents: 2027 diff changeset	150 SDL_MintAudio_CheckFpu(void)
2027 d48ead2d2ba5 Save/restore FPU registers in interrupt Patrice Mandin <patmandin@gmail.com> parents: 1895 diff changeset	151 {
2043 adf732f1f016 Formatting update Sam Lantinga <slouken@libsdl.org> parents: 2027 diff changeset	152 unsigned long cookie_fpu;
2027 d48ead2d2ba5 Save/restore FPU registers in interrupt Patrice Mandin <patmandin@gmail.com> parents: 1895 diff changeset	153
2043 adf732f1f016 Formatting update Sam Lantinga <slouken@libsdl.org> parents: 2027 diff changeset	154 SDL_MintAudio_hasfpu = 0;
adf732f1f016 Formatting update Sam Lantinga <slouken@libsdl.org> parents: 2027 diff changeset	155 if (Getcookie(C__FPU, &cookie_fpu) != C_FOUND) {
adf732f1f016 Formatting update Sam Lantinga <slouken@libsdl.org> parents: 2027 diff changeset	156 return;
adf732f1f016 Formatting update Sam Lantinga <slouken@libsdl.org> parents: 2027 diff changeset	157 }
adf732f1f016 Formatting update Sam Lantinga <slouken@libsdl.org> parents: 2027 diff changeset	158 switch ((cookie_fpu >> 16) & 0xfffe) {
adf732f1f016 Formatting update Sam Lantinga <slouken@libsdl.org> parents: 2027 diff changeset	159 case 2:
adf732f1f016 Formatting update Sam Lantinga <slouken@libsdl.org> parents: 2027 diff changeset	160 case 4:
adf732f1f016 Formatting update Sam Lantinga <slouken@libsdl.org> parents: 2027 diff changeset	161 case 6:
adf732f1f016 Formatting update Sam Lantinga <slouken@libsdl.org> parents: 2027 diff changeset	162 case 8:
adf732f1f016 Formatting update Sam Lantinga <slouken@libsdl.org> parents: 2027 diff changeset	163 case 16:
adf732f1f016 Formatting update Sam Lantinga <slouken@libsdl.org> parents: 2027 diff changeset	164 SDL_MintAudio_hasfpu = 1;
adf732f1f016 Formatting update Sam Lantinga <slouken@libsdl.org> parents: 2027 diff changeset	165 break;
adf732f1f016 Formatting update Sam Lantinga <slouken@libsdl.org> parents: 2027 diff changeset	166 }
2027 d48ead2d2ba5 Save/restore FPU registers in interrupt Patrice Mandin <patmandin@gmail.com> parents: 1895 diff changeset	167 }
d48ead2d2ba5 Save/restore FPU registers in interrupt Patrice Mandin <patmandin@gmail.com> parents: 1895 diff changeset	168
1111 12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	169 /* The thread function, used under MiNT with xbios */
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	170 int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	171 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	172 {
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	173 SndBufPtr pointers;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	174 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	175
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	176 SDL_MintAudio_thread_finished = SDL_FALSE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	177 while (!SDL_MintAudio_quit_thread) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	178 if (Buffptr(&pointers) != 0)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	179 continue;
1111 12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	180
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	181 if (((unsigned long) pointers.play >=
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	182 (unsigned long) SDL_MintAudio_audiobuf[0])
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	183 && ((unsigned long) pointers.play <=
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	184 (unsigned long) SDL_MintAudio_audiobuf[1])) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	185 /* DMA is reading buffer #0, setup buffer #1 if not already done */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	186 if (!buffers_filled[1]) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	187 SDL_MintAudio_numbuf = 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	188 SDL_MintAudio_Callback();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	189 Setbuffer(0, SDL_MintAudio_audiobuf[1],
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	190 SDL_MintAudio_audiobuf[1] +
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	191 SDL_MintAudio_audiosize);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	192 buffers_filled[1] = SDL_TRUE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	193 buffers_filled[0] = SDL_FALSE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	194 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	195 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	196 /* DMA is reading buffer #1, setup buffer #0 if not already done */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	197 if (!buffers_filled[0]) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	198 SDL_MintAudio_numbuf = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	199 SDL_MintAudio_Callback();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	200 Setbuffer(0, SDL_MintAudio_audiobuf[0],
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	201 SDL_MintAudio_audiobuf[0] +
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	202 SDL_MintAudio_audiosize);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	203 buffers_filled[0] = SDL_TRUE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	204 buffers_filled[1] = SDL_FALSE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	205 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	206 }
1111 12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	207
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	208 usleep(100);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	209 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	210 SDL_MintAudio_thread_finished = SDL_TRUE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	211 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	212 }
12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	213
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	214 void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	215 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	216 {
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	217 if (!SDL_MintAudio_mint_present)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	218 return;
1111 12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	219
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	220 if (SDL_MintAudio_thread_finished)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	221 return;
1111 12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	222
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	223 SDL_MintAudio_quit_thread = SDL_TRUE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	224 while (!SDL_MintAudio_thread_finished) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	225 Syield();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	226 }
1111 12c49532be00 Use MiNT thread to update DMA pointers instead of unusable MFP interrupt Patrice Mandin <patmandin@gmail.com> parents: 1107 diff changeset	227 }
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	228
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1819 diff changeset	229 /* vi: set ts=4 sw=4 expandtab: */

Mercurial > sdl-ios-xcode

annotate src/audio/mint/SDL_mintaudio.c @ 3796:b19680c84cdf SDL-ryan-multiple-audio-device