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

annotate src/audio/dma/SDL_dmaaudio.c @ 3812:35d1367020a3 SDL-ryan-multiple-audio-device

Updated arts driver for 1.3 audio API.

author	Ryan C. Gordon <icculus@icculus.org>
date	Fri, 06 Oct 2006 02:40:02 +0000
parents	2c5387c0a642
children	9d070c1a45fa

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
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	65 /* Audio driver functions */
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	66 static int 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	67 static const char *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	68 static int DMA_OpenDevice(_THIS, const char *devname, 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	69 static void DMA_WaitDevice(_THIS);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	70 static void DMA_PlayDevice(_THIS);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	71 static Uint8 *DMA_GetDeviceBuf(_THIS);
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	72 static void 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	73 static void DMA_Deinitialize(void);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	74
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	75 /* Audio driver bootstrap functions */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	76
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	77 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	78 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	79 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	80 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	81
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	82 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	83 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	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 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	86 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	87 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	88 (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	89 (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	90 {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	91 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	92 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	93 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	94 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	95 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	96 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	97 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	98 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	99 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	100
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	101
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	102 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	103 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	104 {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	105 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	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
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	108 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	109 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	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 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	112 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	113 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	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
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	116 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	117 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	118 {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	119 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	120 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	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
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	123
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	124 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	125 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	126 {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	127 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	128 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	129 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	130
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	131 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	132 DMA_Available(void)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	133 {
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	134 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	135 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	136 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	137 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	138 return available;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	139 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	140
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	141
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	142 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	143 DMA_Init(SDL_AudioDriverImpl *impl)
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	144 {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	145 /* Set the function pointers */
589bc3d060cd More 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 impl->DetectDevices = DMA_DetectDevices;
589bc3d060cd More 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 impl->GetDeviceName = DMA_GetDeviceName;
589bc3d060cd More 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 impl->OpenDevice = DMA_OpenDevice;
589bc3d060cd More 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 impl->WaitDevice = DMA_WaitDevice;
589bc3d060cd More 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 impl->PlayDevice = DMA_PlayDevice;
589bc3d060cd More 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 impl->GetDeviceBuf = DMA_GetDeviceBuf;
589bc3d060cd More 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 impl->CloseDevice = DMA_CloseDevice;
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	153 impl->Deinitialize = DMA_Deinitialize;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	154
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	155 build_device_lists();
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	156 return 1;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	157 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	158
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	159 AudioBootStrap DMA_bootstrap = {
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	160 DMA_DRIVER_NAME, "OSS /dev/dsp DMA audio",
3798 c8b3d3d13ed1 Audio bootstraps can now specify that a driver is only to be used if Ryan C. Gordon <icculus@icculus.org> parents: 3795 diff changeset	161 DMA_Available, DMA_Init, 0
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	162 };
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	163
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	164 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	165 {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	166 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	167 }
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	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 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	170 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	171 {
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	172 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	173 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	174 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	175 } else {
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	176 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	177 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	178 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	179
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	180 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	181 }
589bc3d060cd More 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 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	185 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	186 {
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	187 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	188 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	189 } 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	190 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	191 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	192
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	193 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	194 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	195 }
589bc3d060cd More 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
589bc3d060cd More 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 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	199 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	200 {
589bc3d060cd More 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 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	202 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	203
589bc3d060cd More 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 /* 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	205 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	206 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	207 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	208 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	209 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	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
589bc3d060cd More 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 /* 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	213 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	214
589bc3d060cd More 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 /* 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	216 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	217 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	218 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	219 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	220 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	221
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	222 /* 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	223 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	224 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	225 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	226 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	227
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	228 /* 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	229 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	230 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	231 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	232 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	233 }
589bc3d060cd More 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
589bc3d060cd More 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 /* 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	236 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	237 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	238 (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	239 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	240 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	241 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	242
589bc3d060cd More 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 /* 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	244 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	245 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	246 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	247 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	248 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	249 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	250
589bc3d060cd More 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 /* 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	252 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	253 }
589bc3d060cd More 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
589bc3d060cd More 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
589bc3d060cd More 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
589bc3d060cd More 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 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	258 open_device_internal(_THIS, const char *devname, 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	259 {
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	260 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	261 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	262 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	263 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	264 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	265 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	266
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	267 /* 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	268 /* ...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	269 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	270 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	271 ((!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	272 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	273 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	274 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	275 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	276 }
2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	277
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	278 /* 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	279 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	280 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	281 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	282 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	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 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	286
589bc3d060cd More 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
589bc3d060cd More 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 /* 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	289 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	290 if (audio_fd < 0) {
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	291 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	292 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	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 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	295 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	296
589bc3d060cd More 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 /* 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	298 if (ioctl(audio_fd, SNDCTL_DSP_GETFMTS, &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	299 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	300 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	301 }
589bc3d060cd More 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 /* 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	304 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	305 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	306 !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	307 #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	308 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	309 #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	310 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	311 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	312 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	313 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	314 }
589bc3d060cd More 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 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	316 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	317 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	318 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	319 }
589bc3d060cd More 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 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	321 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	322 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	323 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	324 }
589bc3d060cd More 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 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	326 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	327 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	328 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	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 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	331 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	332 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	333 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	334 }
589bc3d060cd More 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 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	336 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	337 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	338 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	339 }
589bc3d060cd More 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 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	341 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	342 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	343 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	344 }
589bc3d060cd More 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 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	346 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	347 }
589bc3d060cd More 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 }
589bc3d060cd More 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 if (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	350 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	351 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	352 }
589bc3d060cd More 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.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	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 /* 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	356 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	357 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	358 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	359 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	360 }
589bc3d060cd More 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
589bc3d060cd More 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 /* 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	363 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	364 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	365 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	366 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	367 } 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	368 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	369 }
589bc3d060cd More 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
589bc3d060cd More 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 /* 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	372 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	373 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	374 */
3810 2c5387c0a642 Multiple audio device code is now working for dsp and dma targets. Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	375 if (DMA_ReopenAudio(this, devname, format, stereo) < 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	376 /* 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	377 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	378 }
589bc3d060cd More 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 /* 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	381 if (ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &info) < 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	382 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	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 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	386 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	387 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	388 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	389 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	390 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	391 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	392 if (dma_buf == 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	393 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	394 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	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 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	398
589bc3d060cd More 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 /* 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	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 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	402 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	403 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	404 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	405 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	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 }
589bc3d060cd More 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
589bc3d060cd More 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 /* 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	410 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	411 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	412 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	413 if (ioctl(audio_fd, SNDCTL_DSP_SETTRIGGER, &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	414 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	415 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	416 }
589bc3d060cd More 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
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	418 /* 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	419 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	420
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	421 /* 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	422 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	423 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	424
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	425 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	426 DMA_OpenDevice(_THIS, const char *devname, 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	427 {
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	428 int retval = open_device_internal(this, devname, 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	429 if (!retval)
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	430 DMA_CloseDevice(this); /* !!! FIXME: do this at higher level. */
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	431 return retval;
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	432 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	433
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	434
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	435
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	436
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	437 /* 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	438 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	439 DMA_WaitDevice(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	440 {
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	441 fd_set fdset;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	442
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	443 /* 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	444 {
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 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	446 /* 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	447 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	448 */
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 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	450 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	451 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	452 }
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 }
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 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	455
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 /* 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	457 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	458 /* 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	459 Sint32 ticks;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	460
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	461 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	462 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	463 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	464 }
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	465 } 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	466 /* 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	467 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	468 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	469 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	470 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	471 timeout.tv_usec = 0;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	472 #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	473 fprintf(stderr, "Waiting for audio to get ready\n");
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	474 #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	475 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	476 const char *message =
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	477 #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	478 "Audio timeout - buggy audio driver? (trying ospace)";
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	479 #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	480 "Audio timeout - buggy audio driver? (disabled)";
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 /* 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	483 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	484 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	485 */
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 fprintf(stderr, "SDL: %s\n", message);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	487 #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	488 /* 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	489 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	490 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	491 next_frame = SDL_GetTicks() + frame_ticks;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	492 #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	493 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	494 /* 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	495 audio_fd = -1;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	496 #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	497 fprintf(stderr, "Done disabling audio\n");
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	498 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	499 #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	500 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	501 #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	502 fprintf(stderr, "Ready!\n");
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	503 #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	504 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	505 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	506
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 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	508 DMA_PlayDevice(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	509 {
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	510 /* 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	511 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	512 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	513 }
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 return;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	515 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	516
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	517 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	518 DMA_GetDeviceBuf(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	519 {
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	520 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	521 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	522 int filling;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	523
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	524 /* 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	525 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	526 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	527 /* 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	528 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	529 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	530 }
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	531 }
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	532 while (frame_ticks && (info.blocks < 1));
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	533 #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	534 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	535 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	536 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	537 #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	538 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	539 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	540 return (dma_buf + (filling * this->spec.size));
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	541 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	542
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	543 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	544 DMA_CloseDevice(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	545 {
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	546 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	547 if (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	548 munmap(dma_buf, 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	549 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	550 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	551 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	552 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	553 audio_fd = -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	554 }
589bc3d060cd More 1.3 audio work...moved dsp and dma drivers over to new model. Untested! Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	555 SDL_free(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	556 this->hidden = NULL;
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	557 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	558 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	559
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	560 /* vi: set ts=4 sw=4 expandtab: */

Mercurial > sdl-ios-xcode

annotate src/audio/dma/SDL_dmaaudio.c @ 3812:35d1367020a3 SDL-ryan-multiple-audio-device