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

annotate src/audio/dma/SDL_dmaaudio.c @ 3846:66fb40445587 SDL-ryan-multiple-audio-device

Removed distinction between "available" and "init" in audio backends, since both had to be checked for success as a pair at the higher level and several of the Available methods were just always-succeed placeholders anyhow. Now the availability check is done in the init code, and the higher level tries all possible drivers until one manages to initialize successfully.

author	Ryan C. Gordon <icculus@icculus.org>
date	Tue, 17 Oct 2006 09:09:21 +0000
parents	103bbe13f5eb
children

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
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	119
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	120 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	121 {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	122 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	123 }
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	124
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	125 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	126 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	127 {
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	128 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	129 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	130 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	131 } else {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	132 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	133 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	134 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	135
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	136 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	137 }
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	138
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	139
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	140 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	141 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	142 {
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	143 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	144 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	145 } 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	146 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	147 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	148
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	149 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	150 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	151 }
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	152
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	153
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	154 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	155 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	156 {
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	157 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	158 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	159
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 /* 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	161 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	162 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	163 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	164 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	165 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	166 }
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
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 /* 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	169 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	170
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 /* 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	172 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	173 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	174 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	175 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	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
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 /* 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	179 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	180 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	181 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	182 }
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
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 /* 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	185 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	186 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	187 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	188 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	189 }
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
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 /* 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	192 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	193 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	194 (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	195 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	196 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	197 }
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 /* 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	200 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	201 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	202 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	203 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	204 }
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 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	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 /* 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	208 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	209 }
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
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
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	212 static void
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	213 DMA_CloseDevice(_THIS)
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	214 {
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	215 if (this->hidden != NULL) {
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	216 if (dma_buf != NULL) {
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	217 munmap(dma_buf, dma_len);
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	218 dma_buf = NULL;
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	219 }
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	220 if (audio_fd >= 0) {
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	221 close(audio_fd);
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	222 audio_fd = -1;
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 SDL_free(this->hidden);
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	225 this->hidden = NULL;
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	226 }
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	227 }
103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	228
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	229
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	230 static int
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	231 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	232 {
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	233 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	234 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	235 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	236 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	237 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	238 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	239
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	240 /* 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	241 /* ...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	242 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	243 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	244 ((!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	245 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	246 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	247 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	248 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	249 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	250
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	251 /* 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	252 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	253 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	254 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	255 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	256 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	257 }
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	258 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	259
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 /* 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	261 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	262 if (audio_fd < 0) {
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	263 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	264 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	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 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	268 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	269
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	270 /* 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	271 if (ioctl(audio_fd, SNDCTL_DSP_GETFMTS, &value) < 0) {
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	272 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	273 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	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
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 /* 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	278 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	279 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	280 !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	281 #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	282 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	283 #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	284 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	285 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	286 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	287 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	288 }
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 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	290 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	291 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	292 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	293 }
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 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	295 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	296 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	297 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	298 }
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 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	300 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	301 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	302 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	303 }
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 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	305 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	306 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	307 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	308 }
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 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	310 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	311 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	312 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	313 }
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 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	315 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	316 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	317 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	318 }
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 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	320 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	321 }
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 if (format == 0) {
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	324 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	325 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	326 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	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 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	329
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 /* 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	331 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	332 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	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 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	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
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 /* 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	339 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	340 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	341 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	342 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	343 } 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	344 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	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 /* 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	348 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	349 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	350 */
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	351 if (DMA_ReopenAudio(this, devname, format, stereo) < 0) {
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	352 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	353 /* 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	354 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	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
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 /* 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	358 if (ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &info) < 0) {
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	359 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	360 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	361 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	362 }
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 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	364 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	365 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	366 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	367 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	368 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	369 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	370 if (dma_buf == MAP_FAILED) {
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	371 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	372 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	373 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	374 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	375 }
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 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	377
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 /* 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	379 {
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	380 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	381 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	382 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	383 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	384 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	385 }
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
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 /* 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	389 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	390 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	391 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	392 if (ioctl(audio_fd, SNDCTL_DSP_SETTRIGGER, &value) < 0) {
3817 103bbe13f5eb Patched to compile. Ryan C. Gordon <icculus@icculus.org> parents: 3816 diff changeset	393 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	394 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	395 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	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
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 /* 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	399 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	400
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 /* 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	402 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	403 }
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
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
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	406 /* 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	407 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	408 DMA_WaitDevice(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	409 {
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	410 fd_set fdset;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	411
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	412 /* 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	413 {
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	414 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	415 /* 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	416 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	417 */
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	418 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	419 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	420 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	421 }
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 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	424
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	425 /* 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	426 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	427 /* 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	428 Sint32 ticks;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	429
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	430 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	431 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	432 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	433 }
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 } 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	435 /* 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	436 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	437 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	438 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	439 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	440 timeout.tv_usec = 0;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	441 #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	442 fprintf(stderr, "Waiting for audio to get ready\n");
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	443 #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	444 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	445 const char *message =
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	446 #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	447 "Audio timeout - buggy audio driver? (trying ospace)";
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	448 #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	449 "Audio timeout - buggy audio driver? (disabled)";
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	450 #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	451 /* 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	452 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	453 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	454 */
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	455 fprintf(stderr, "SDL: %s\n", message);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	456 #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	457 /* 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	458 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	459 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	460 next_frame = SDL_GetTicks() + frame_ticks;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	461 #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	462 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	463 /* 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	464 audio_fd = -1;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	465 #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	466 fprintf(stderr, "Done disabling audio\n");
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	467 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	468 #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	469 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	470 #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	471 fprintf(stderr, "Ready!\n");
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	472 #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	473 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	474 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	475
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	476 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	477 DMA_PlayDevice(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	478 {
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	479 /* 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	480 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	481 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	482 }
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	483 return;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	484 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	485
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	486 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	487 DMA_GetDeviceBuf(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	488 {
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	489 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	490 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	491 int filling;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	492
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	493 /* 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	494 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	495 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	496 /* 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	497 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	498 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	499 }
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 }
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	501 while (frame_ticks && (info.blocks < 1));
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	502 #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	503 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	504 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	505 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	506 #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	507 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	508 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	509 return (dma_buf + (filling * this->spec.size));
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	510 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	511
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	512
3816 9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	513 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	514 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	515 {
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	516 /* 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	517 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	518 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	519 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	520 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	521 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	522 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	523 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	524 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	525
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	526 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	527 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	528 }
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	529
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	530 AudioBootStrap DMA_bootstrap = {
3846 66fb40445587 Removed distinction between "available" and "init" in audio backends, since Ryan C. Gordon <icculus@icculus.org> parents: 3817 diff changeset	531 DMA_DRIVER_NAME, "OSS /dev/dsp DMA audio", DMA_Init, 0
3816 9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	532 };
9d070c1a45fa Moved AudioBootstrap section in converted drivers to bottom of source, so I Ryan C. Gordon <icculus@icculus.org> parents: 3810 diff changeset	533
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	534 /* vi: set ts=4 sw=4 expandtab: */

Mercurial > sdl-ios-xcode

annotate src/audio/dma/SDL_dmaaudio.c @ 3846:66fb40445587 SDL-ryan-multiple-audio-device