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

annotate src/audio/dma/SDL_dmaaudio.c @ 3817:103bbe13f5eb SDL-ryan-multiple-audio-device

Patched to compile.

author	Ryan C. Gordon <icculus@icculus.org>
date	Fri, 06 Oct 2006 04:49:48 +0000
parents	9d070c1a45fa
children	66fb40445587

rev	line source
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	1 /*
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	2 SDL - Simple DirectMedia Layer
1312 c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 960 diff changeset	3 Copyright (C) 1997-2006 Sam Lantinga
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	4
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	5 This library is free software; you can redistribute it and/or
1312 c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 960 diff changeset	6 modify it under the terms of the GNU Lesser General Public
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	7 License as published by the Free Software Foundation; either
1312 c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 960 diff changeset	8 version 2.1 of the License, or (at your option) any later version.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	9
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	10 This library is distributed in the hope that it will be useful,
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	11 but WITHOUT ANY WARRANTY; without even the implied warranty of
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
1312 c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 960 diff changeset	13 Lesser General Public License for more details.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	14
1312 c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 960 diff changeset	15 You should have received a copy of the GNU Lesser General Public
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 960 diff changeset	16 License along with this library; if not, write to the Free Software
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges) Sam Lantinga <slouken@libsdl.org> parents: 960 diff changeset	17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	18
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	19 Sam Lantinga
252 e8157fcb3114 Updated the source with the correct e-mail address Sam Lantinga <slouken@libsdl.org> parents: 94 diff changeset	20 slouken@libsdl.org
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	21 */
1402 d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1361 diff changeset	22 #include "SDL_config.h"
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	23
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	24 /* !!! FIXME: merge this driver with "dsp". */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	25
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	26 /* Allow access to a raw mixing buffer */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	27
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	28 #include <stdio.h>
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	29 #include <string.h> /* For strerror() */
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	30 #include <errno.h>
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	31 #include <unistd.h>
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	32 #include <fcntl.h>
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	33 #include <signal.h>
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	34 #include <sys/types.h>
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	35 #include <sys/time.h>
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	36 #include <sys/ioctl.h>
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	37 #include <sys/stat.h>
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	38 #include <sys/mman.h>
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	39
19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	40 #if SDL_AUDIO_DRIVER_OSS_SOUNDCARD_H
94 ae6e6b73333f Cleaned up the OpenBSD port, thanks to Peter Valchev Sam Lantinga <slouken@lokigames.com> parents: 92 diff changeset	41 /* This is installed on some systems */
ae6e6b73333f Cleaned up the OpenBSD port, thanks to Peter Valchev Sam Lantinga <slouken@lokigames.com> parents: 92 diff changeset	42 #include <soundcard.h>
ae6e6b73333f Cleaned up the OpenBSD port, thanks to Peter Valchev Sam Lantinga <slouken@lokigames.com> parents: 92 diff changeset	43 #else
ae6e6b73333f Cleaned up the OpenBSD port, thanks to Peter Valchev Sam Lantinga <slouken@lokigames.com> parents: 92 diff changeset	44 /* This is recommended by OSS */
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	45 #include <sys/soundcard.h>
94 ae6e6b73333f Cleaned up the OpenBSD port, thanks to Peter Valchev Sam Lantinga <slouken@lokigames.com> parents: 92 diff changeset	46 #endif
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	47
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	48 #ifndef MAP_FAILED
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	49 #define MAP_FAILED ((Uint8 *)-1)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	50 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	51
1358 c71e05b4dc2e More header massaging... works great on Windows. ;-) Sam Lantinga <slouken@libsdl.org> parents: 1341 diff changeset	52 #include "SDL_timer.h"
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	53 #include "SDL_audio.h"
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	54 #include "../SDL_audio_c.h"
19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	55 #include "../SDL_audiodev_c.h"
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	56 #include "SDL_dmaaudio.h"
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	57
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	58 /* The tag name used by DMA audio */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	59 #define DMA_DRIVER_NAME "dma"
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	60
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	61 /* Open the audio device for playback, and don't block if busy */
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	62 #define OPEN_FLAGS_INPUT (O_RDWR\|O_NONBLOCK)
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	63 #define OPEN_FLAGS_OUTPUT (O_RDWR\|O_NONBLOCK)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	64
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	65 static char **outputDevices = NULL;
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	66 static int outputDeviceCount = 0;
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	67 static char **inputDevices = NULL;
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	68 static int inputDeviceCount = 0;
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	69
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	70 static int
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	71 test_for_mmap(int fd)
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	72 {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	73 int caps = 0;
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	74 struct audio_buf_info info;
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	75 if ((ioctl(fd, SNDCTL_DSP_GETCAPS, &caps) == 0) &&
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	76 (caps & DSP_CAP_TRIGGER) && (caps & DSP_CAP_MMAP) &&
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	77 (ioctl(fd, SNDCTL_DSP_GETOSPACE, &info) == 0))
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	78 {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	79 size_t len = info.fragstotal * info.fragsize;
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	80 Uint8 buf = (Uint8 ) mmap(NULL, len, PROT_WRITE, MAP_SHARED, fd, 0);
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	81 if (buf != MAP_FAILED) {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	82 munmap(buf, len);
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	83 return 1;
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	84 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	85 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	86 return 0;
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	87 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	88
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	89
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	90 static inline void
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	91 free_device_list(char **devs, int count)
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	92 {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	93 SDL_FreeUnixAudioDevices(devs, count);
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	94 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	95
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	96 static inline void
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	97 build_device_list(int iscapture, char **devs, int count)
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	98 {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	99 const int flags = ((iscapture) ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT);
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	100 free_device_list(devs, count);
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	101 SDL_EnumUnixAudioDevices(flags, 0, test_for_mmap, devs, count);
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	102 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	103
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	104 static inline void
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	105 build_device_lists(void)
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	106 {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	107 build_device_list(0, &outputDevices, &outputDeviceCount);
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	108 build_device_list(1, &inputDevices, &inputDeviceCount);
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	109 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	110
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	111
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	112 static inline void
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	113 free_device_lists(void)
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	114 {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	115 free_device_list(&outputDevices, &outputDeviceCount);
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	116 free_device_list(&inputDevices, &inputDeviceCount);
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	117 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	118
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	119 static int
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	120 DMA_Available(void)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	121 {
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	122 int available = 0;
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	123 build_device_lists();
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	124 available = ((outputDeviceCount > 0) \|\| (inputDeviceCount > 0));
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	125 free_device_lists();
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	126 return available;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	127 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	128
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	129 static void DMA_Deinitialize(void)
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	130 {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	131 free_device_lists();
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	132 }
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	133
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	134 static int
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	135 DMA_DetectDevices(int iscapture)
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	136 {
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	137 if (iscapture) {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	138 build_device_list(1, &inputDevices, &inputDeviceCount);
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	139 return inputDeviceCount;
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	140 } else {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	141 build_device_list(0, &outputDevices, &outputDeviceCount);
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	142 return outputDeviceCount;
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	143 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	144
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	145 return 0; /* shouldn't ever hit this. */
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	146 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	147
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	148
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	149 static const char *
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	150 DMA_GetDeviceName(int index, int iscapture)
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	151 {
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	152 if ((iscapture) && (index < inputDeviceCount)) {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	153 return inputDevices[index];
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	154 } else if ((!iscapture) && (index < outputDeviceCount)) {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	155 return outputDevices[index];
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	156 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	157
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	158 SDL_SetError("No such device");
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	159 return NULL;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	160 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	161
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	162
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	163 static int
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	164 DMA_ReopenAudio(_THIS, const char *audiodev, int format, int stereo)
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	165 {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	166 int frag_spec;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	167 int value;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	168
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	169 /* Close and then reopen the audio device */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	170 close(audio_fd);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	171 audio_fd = open(audiodev, O_RDWR, 0);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	172 if (audio_fd < 0) {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	173 SDL_SetError("Couldn't open %s: %s", audiodev, strerror(errno));
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	174 return (-1);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	175 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	176
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	177 /* Calculate the final parameters for this audio specification */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	178 SDL_CalculateAudioSpec(&this->spec);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	179
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	180 /* Determine the power of two of the fragment size */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	181 for (frag_spec = 0; (0x01 << frag_spec) < this->spec.size; ++frag_spec);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	182 if ((0x01 << frag_spec) != this->spec.size) {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	183 SDL_SetError("Fragment size must be a power of two");
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	184 return (-1);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	185 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	186
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	187 /* Set the audio buffering parameters */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	188 if (ioctl(audio_fd, SNDCTL_DSP_SETFRAGMENT, &frag_spec) < 0) {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	189 SDL_SetError("Couldn't set audio fragment spec");
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	190 return (-1);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	191 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	192
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	193 /* Set the audio format */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	194 value = format;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	195 if ((ioctl(audio_fd, SNDCTL_DSP_SETFMT, &value) < 0) \|\| (value != format)) {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	196 SDL_SetError("Couldn't set audio format");
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	197 return (-1);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	198 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	199
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	200 /* Set mono or stereo audio */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	201 value = (this->spec.channels > 1);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	202 if ((ioctl(audio_fd, SNDCTL_DSP_STEREO, &stereo) < 0) \|\|
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	203 (value != stereo)) {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	204 SDL_SetError("Couldn't set audio channels");
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	205 return (-1);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	206 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	207
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	208 /* Set the DSP frequency */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	209 value = this->spec.freq;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	210 if (ioctl(audio_fd, SNDCTL_DSP_SPEED, &value) < 0) {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	211 SDL_SetError("Couldn't set audio frequency");
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	212 return (-1);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	213 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	214 this->spec.freq = value;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	215
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	216 /* We successfully re-opened the audio */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	217 return (0);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	218 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	219
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	220
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	221 static void
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	222 DMA_CloseDevice(_THIS)
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	223 {
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	224 if (this->hidden != NULL) {
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	225 if (dma_buf != NULL) {
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	226 munmap(dma_buf, dma_len);
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	227 dma_buf = NULL;
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	228 }
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	229 if (audio_fd >= 0) {
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	230 close(audio_fd);
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	231 audio_fd = -1;
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	232 }
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	233 SDL_free(this->hidden);
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	234 this->hidden = NULL;
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	235 }
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	236 }
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	237
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	238
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	239 static int
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	240 DMA_OpenDevice(_THIS, const char *devname, int iscapture)
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	241 {
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	242 const int flags = ((iscapture) ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT);
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	243 int format;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	244 int stereo;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	245 int value;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	246 SDL_AudioFormat test_format;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	247 struct audio_buf_info info;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	248
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	249 /* We don't care what the devname is...we'll try to open anything. */
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	250 /* ...but default to first name in the list... */
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	251 if (devname == NULL) {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	252 if ( ((iscapture) && (inputDeviceCount == 0)) \|\|
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	253 ((!iscapture) && (outputDeviceCount == 0)) ) {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	254 SDL_SetError("No such audio device");
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	255 return 0;
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	256 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	257 devname = ((iscapture) ? inputDevices[0] : outputDevices[0]);
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	258 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	259
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	260 /* Initialize all variables that we clean on shutdown */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	261 this->hidden = (struct SDL_PrivateAudioData *)
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	262 SDL_malloc((sizeof *this->hidden));
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	263 if (this->hidden == NULL) {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	264 SDL_OutOfMemory();
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	265 return 0;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	266 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	267 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	268
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	269 /* Open the audio device */
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	270 audio_fd = open(devname, flags, 0);
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	271 if (audio_fd < 0) {
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	272 DMA_CloseDevice(this);
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	273 SDL_SetError("Couldn't open %s: %s", devname, strerror(errno));
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	274 return 0;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	275 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	276 dma_buf = NULL;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	277 ioctl(audio_fd, SNDCTL_DSP_RESET, 0);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	278
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	279 /* Get a list of supported hardware formats */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	280 if (ioctl(audio_fd, SNDCTL_DSP_GETFMTS, &value) < 0) {
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	281 DMA_CloseDevice(this);
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	282 SDL_SetError("Couldn't get audio format list");
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	283 return 0;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	284 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	285
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	286 /* Try for a closest match on audio format */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	287 format = 0;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	288 for (test_format = SDL_FirstAudioFormat(this->spec.format);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	289 !format && test_format;) {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	290 #ifdef DEBUG_AUDIO
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	291 fprintf(stderr, "Trying format 0x%4.4x\n", test_format);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	292 #endif
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	293 switch (test_format) {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	294 case AUDIO_U8:
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	295 if (value & AFMT_U8) {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	296 format = AFMT_U8;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	297 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	298 break;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	299 case AUDIO_S8:
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	300 if (value & AFMT_S8) {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	301 format = AFMT_S8;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	302 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	303 break;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	304 case AUDIO_S16LSB:
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	305 if (value & AFMT_S16_LE) {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	306 format = AFMT_S16_LE;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	307 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	308 break;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	309 case AUDIO_S16MSB:
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	310 if (value & AFMT_S16_BE) {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	311 format = AFMT_S16_BE;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	312 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	313 break;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	314 case AUDIO_U16LSB:
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	315 if (value & AFMT_U16_LE) {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	316 format = AFMT_U16_LE;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	317 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	318 break;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	319 case AUDIO_U16MSB:
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	320 if (value & AFMT_U16_BE) {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	321 format = AFMT_U16_BE;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	322 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	323 break;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	324 default:
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	325 format = 0;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	326 break;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	327 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	328 if (!format) {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	329 test_format = SDL_NextAudioFormat();
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	330 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	331 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	332 if (format == 0) {
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	333 DMA_CloseDevice(this);
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	334 SDL_SetError("Couldn't find any hardware audio formats");
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	335 return 0;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	336 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	337 this->spec.format = test_format;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	338
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	339 /* Set the audio format */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	340 value = format;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	341 if ((ioctl(audio_fd, SNDCTL_DSP_SETFMT, &value) < 0) \|\| (value != format)) {
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	342 DMA_CloseDevice(this);
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	343 SDL_SetError("Couldn't set audio format");
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	344 return 0;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	345 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	346
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	347 /* Set mono or stereo audio (currently only two channels supported) */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	348 stereo = (this->spec.channels > 1);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	349 ioctl(audio_fd, SNDCTL_DSP_STEREO, &stereo);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	350 if (stereo) {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	351 this->spec.channels = 2;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	352 } else {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	353 this->spec.channels = 1;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	354 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	355
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	356 /* Because some drivers don't allow setting the buffer size
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	357 after setting the format, we must re-open the audio device
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	358 once we know what format and channels are supported
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	359 */
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	360 if (DMA_ReopenAudio(this, devname, format, stereo) < 0) {
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	361 DMA_CloseDevice(this);
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	362 /* Error is set by DMA_ReopenAudio() */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	363 return 0;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	364 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	365
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	366 /* Memory map the audio buffer */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	367 if (ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &info) < 0) {
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	368 DMA_CloseDevice(this);
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	369 SDL_SetError("Couldn't get OSPACE parameters");
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	370 return 0;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	371 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	372 this->spec.size = info.fragsize;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	373 this->spec.samples = this->spec.size / ((this->spec.format & 0xFF) / 8);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	374 this->spec.samples /= this->spec.channels;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	375 num_buffers = info.fragstotal;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	376 dma_len = num_buffers * this->spec.size;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	377 dma_buf = (Uint8 *) mmap(NULL, dma_len, PROT_WRITE, MAP_SHARED,
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	378 audio_fd, 0);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	379 if (dma_buf == MAP_FAILED) {
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	380 DMA_CloseDevice(this);
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	381 SDL_SetError("DMA memory map failed");
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	382 dma_buf = NULL;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	383 return 0;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	384 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	385 SDL_memset(dma_buf, this->spec.silence, dma_len);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	386
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	387 /* Check to see if we need to use select() workaround */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	388 {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	389 char *workaround;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	390 workaround = SDL_getenv("SDL_DSP_NOSELECT");
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	391 if (workaround) {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	392 frame_ticks = (float) (this->spec.samples*1000) / this->spec.freq;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	393 next_frame = SDL_GetTicks() + frame_ticks;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	394 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	395 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	396
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	397 /* Trigger audio playback */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	398 value = 0;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	399 ioctl(audio_fd, SNDCTL_DSP_SETTRIGGER, &value);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	400 value = PCM_ENABLE_OUTPUT;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	401 if (ioctl(audio_fd, SNDCTL_DSP_SETTRIGGER, &value) < 0) {
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	402 DMA_CloseDevice(this);
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	403 SDL_SetError("Couldn't trigger audio output");
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	404 return 0;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	405 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	406
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	407 /* Get the parent process id (we're the parent of the audio thread) */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	408 parent = getpid();
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	409
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	410 /* We're ready to rock and roll. :-) */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	411 return 1;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	412 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	413
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	414
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	415 /* This function waits until it is possible to write a full sound buffer */
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	416 static void
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	417 DMA_WaitDevice(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	418 {
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	419 fd_set fdset;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	420
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	421 /* Check to see if the thread-parent process is still alive */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	422 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	423 static int cnt = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	424 /* Note that this only works with thread implementations
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	425 that use a different process id for each thread.
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	426 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	427 if (parent && (((++cnt) % 10) == 0)) { /* Check every 10 loops */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	428 if (kill(parent, 0) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	429 this->enabled = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	430 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	431 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	432 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	433
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	434 /* See if we need to use timed audio synchronization */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	435 if (frame_ticks) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	436 /* Use timer for general audio synchronization */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	437 Sint32 ticks;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	438
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	439 ticks = ((Sint32) (next_frame - SDL_GetTicks())) - FUDGE_TICKS;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	440 if (ticks > 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	441 SDL_Delay(ticks);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	442 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	443 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	444 /* Use select() for audio synchronization */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	445 struct timeval timeout;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	446 FD_ZERO(&fdset);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	447 FD_SET(audio_fd, &fdset);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	448 timeout.tv_sec = 10;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	449 timeout.tv_usec = 0;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	450 #ifdef DEBUG_AUDIO
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	451 fprintf(stderr, "Waiting for audio to get ready\n");
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	452 #endif
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	453 if (select(audio_fd + 1, NULL, &fdset, NULL, &timeout) <= 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	454 const char *message =
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	455 #ifdef AUDIO_OSPACE_HACK
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	456 "Audio timeout - buggy audio driver? (trying ospace)";
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	457 #else
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	458 "Audio timeout - buggy audio driver? (disabled)";
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	459 #endif
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	460 /* In general we should never print to the screen,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	461 but in this case we have no other way of letting
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	462 the user know what happened.
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	463 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	464 fprintf(stderr, "SDL: %s\n", message);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	465 #ifdef AUDIO_OSPACE_HACK
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	466 /* We may be able to use GET_OSPACE trick */
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	467 frame_ticks = (float) (this->spec.samples * 1000) /
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	468 this->spec.freq;
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	469 next_frame = SDL_GetTicks() + frame_ticks;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	470 #else
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	471 this->enabled = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	472 /* Don't try to close - may hang */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	473 audio_fd = -1;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	474 #ifdef DEBUG_AUDIO
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	475 fprintf(stderr, "Done disabling audio\n");
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	476 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	477 #endif /* AUDIO_OSPACE_HACK */
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	478 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	479 #ifdef DEBUG_AUDIO
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	480 fprintf(stderr, "Ready!\n");
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	481 #endif
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	482 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	483 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	484
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	485 static void
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	486 DMA_PlayDevice(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	487 {
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	488 /* If timer synchronization is enabled, set the next write frame */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	489 if (frame_ticks) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	490 next_frame += frame_ticks;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	491 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	492 return;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	493 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	494
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	495 static Uint8 *
3795 589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	496 DMA_GetDeviceBuf(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	497 {
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	498 count_info info;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	499 int playing;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	500 int filling;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	501
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	502 /* Get number of blocks, looping if we're not using select() */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	503 do {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	504 if (ioctl(audio_fd, SNDCTL_DSP_GETOPTR, &info) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	505 /* Uh oh... */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	506 this->enabled = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	507 return (NULL);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	508 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	509 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	510 while (frame_ticks && (info.blocks < 1));
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	511 #ifdef DEBUG_AUDIO
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	512 if (info.blocks > 1) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	513 printf("Warning: audio underflow (%d frags)\n", info.blocks - 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	514 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	515 #endif
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	516 playing = info.ptr / this->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: 1402 diff changeset	517 filling = (playing + 1) % num_buffers;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	518 return (dma_buf + (filling * this->spec.size));
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	519 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	520
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	521
3816 9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	522 static int
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	523 DMA_Init(SDL_AudioDriverImpl *impl)
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	524 {
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	525 /* Set the function pointers */
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	526 impl->DetectDevices = DMA_DetectDevices;
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	527 impl->GetDeviceName = DMA_GetDeviceName;
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	528 impl->OpenDevice = DMA_OpenDevice;
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	529 impl->WaitDevice = DMA_WaitDevice;
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	530 impl->PlayDevice = DMA_PlayDevice;
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	531 impl->GetDeviceBuf = DMA_GetDeviceBuf;
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	532 impl->CloseDevice = DMA_CloseDevice;
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	533 impl->Deinitialize = DMA_Deinitialize;
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	534
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	535 build_device_lists();
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	536 return 1;
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	537 }
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	538
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	539 AudioBootStrap DMA_bootstrap = {
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	540 DMA_DRIVER_NAME, "OSS /dev/dsp DMA audio",
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	541 DMA_Available, DMA_Init, 0
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	542 };
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	543
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	544 /* vi: set ts=4 sw=4 expandtab: */

Mercurial > sdl-ios-xcode

annotate src/audio/dma/SDL_dmaaudio.c @ 3817:103bbe13f5eb SDL-ryan-multiple-audio-device