| /*
|
| Copyright (C) 1996-1997 Id Software, Inc.
|
|
|
| This program is free software; you can redistribute it and/or
|
| modify it under the terms of the GNU General Public License
|
| as published by the Free Software Foundation; either version 2
|
| of the License, or (at your option) any later version.
|
|
|
| This program is distributed in the hope that it will be useful,
|
| but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
|
| See the GNU General Public License for more details.
|
|
|
| You should have received a copy of the GNU General Public License
|
| along with this program; if not, write to the Free Software
|
| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
| */
|
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <stdlib.h> |
| #include <sys/types.h> |
| #include <sys/ioctl.h> |
| #include <sys/mman.h> |
| #include <sys/shm.h> |
| #include <sys/wait.h> |
| #include <linux/soundcard.h> |
| #include <stdio.h> |
| #include "quakedef.h" |
| |
| int audio_fd; |
| int snd_inited; |
| |
| static int tryrates[] = { 11025, 22051, 44100, 8000 }; |
| |
| qboolean SNDDMA_Init(void) |
| { |
| |
| int rc; |
| int fmt; |
| int tmp; |
| int i; |
| char *s; |
| struct audio_buf_info info; |
| int caps; |
| |
| snd_inited = 0; |
| |
| // open /dev/dsp, confirm capability to mmap, and get size of dma buffer |
| |
| audio_fd = open("/dev/dsp", O_RDWR); |
| if (audio_fd < 0) |
| { |
| perror("/dev/dsp"); |
| Con_Printf("Could not open /dev/dsp\n"); |
| return 0; |
| } |
| |
| rc = ioctl(audio_fd, SNDCTL_DSP_RESET, 0); |
| if (rc < 0) |
| { |
| perror("/dev/dsp"); |
| Con_Printf("Could not reset /dev/dsp\n"); |
| close(audio_fd); |
| return 0; |
| } |
| |
| if (ioctl(audio_fd, SNDCTL_DSP_GETCAPS, &caps)==-1) |
| { |
| perror("/dev/dsp"); |
| Con_Printf("Sound driver too old\n"); |
| close(audio_fd); |
| return 0; |
| } |
| |
| if (!(caps & DSP_CAP_TRIGGER) || !(caps & DSP_CAP_MMAP)) |
| { |
| Con_Printf("Sorry but your soundcard can't do this\n"); |
| close(audio_fd); |
| return 0; |
| } |
| |
| if (ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &info)==-1) |
| { |
| perror("GETOSPACE"); |
| Con_Printf("Um, can't do GETOSPACE?\n"); |
| close(audio_fd); |
| return 0; |
| } |
| |
| shm = &sn; |
| shm->splitbuffer = 0; |
| |
| // set sample bits & speed |
| |
| s = getenv("QUAKE_SOUND_SAMPLEBITS"); |
| if (s) shm->samplebits = atoi(s); |
| else if ((i = COM_CheckParm("-sndbits")) != 0) |
| shm->samplebits = atoi(com_argv[i+1]); |
| if (shm->samplebits != 16 && shm->samplebits != 8) |
| { |
| ioctl(audio_fd, SNDCTL_DSP_GETFMTS, &fmt); |
| if (fmt & AFMT_S16_LE) shm->samplebits = 16; |
| else if (fmt & AFMT_U8) shm->samplebits = 8; |
| } |
| |
| s = getenv("QUAKE_SOUND_SPEED"); |
| if (s) shm->speed = atoi(s); |
| else if ((i = COM_CheckParm("-sndspeed")) != 0) |
| shm->speed = atoi(com_argv[i+1]); |
| else |
| { |
| for (i=0 ; i<sizeof(tryrates)/4 ; i++) |
| if (!ioctl(audio_fd, SNDCTL_DSP_SPEED, &tryrates[i])) break; |
| shm->speed = tryrates[i]; |
| } |
| |
| s = getenv("QUAKE_SOUND_CHANNELS"); |
| if (s) shm->channels = atoi(s); |
| else if ((i = COM_CheckParm("-sndmono")) != 0) |
| shm->channels = 1; |
| else if ((i = COM_CheckParm("-sndstereo")) != 0) |
| shm->channels = 2; |
| else shm->channels = 2; |
| |
| shm->samples = info.fragstotal * info.fragsize / (shm->samplebits/8); |
| shm->submission_chunk = 1; |
| |
| // memory map the dma buffer |
| |
| shm->buffer = (unsigned char *) mmap(NULL, info.fragstotal |
| * info.fragsize, PROT_WRITE, MAP_FILE|MAP_SHARED, audio_fd, 0); |
| if (!shm->buffer || shm->buffer == (unsigned char *)-1) |
| { |
| perror("/dev/dsp"); |
| Con_Printf("Could not mmap /dev/dsp\n"); |
| close(audio_fd); |
| return 0; |
| } |
| |
| tmp = 0; |
| if (shm->channels == 2) |
| tmp = 1; |
| rc = ioctl(audio_fd, SNDCTL_DSP_STEREO, &tmp); |
| if (rc < 0) |
| { |
| perror("/dev/dsp"); |
| Con_Printf("Could not set /dev/dsp to stereo=%d", shm->channels); |
| close(audio_fd); |
| return 0; |
| } |
| if (tmp) |
| shm->channels = 2; |
| else |
| shm->channels = 1; |
| |
| rc = ioctl(audio_fd, SNDCTL_DSP_SPEED, &shm->speed); |
| if (rc < 0) |
| { |
| perror("/dev/dsp"); |
| Con_Printf("Could not set /dev/dsp speed to %d", shm->speed); |
| close(audio_fd); |
| return 0; |
| } |
| |
| if (shm->samplebits == 16) |
| { |
| rc = AFMT_S16_LE; |
| rc = ioctl(audio_fd, SNDCTL_DSP_SETFMT, &rc); |
| if (rc < 0) |
| { |
| perror("/dev/dsp"); |
| Con_Printf("Could not support 16-bit data. Try 8-bit.\n"); |
| close(audio_fd); |
| return 0; |
| } |
| } |
| else if (shm->samplebits == 8) |
| { |
| rc = AFMT_U8; |
| rc = ioctl(audio_fd, SNDCTL_DSP_SETFMT, &rc); |
| if (rc < 0) |
| { |
| perror("/dev/dsp"); |
| Con_Printf("Could not support 8-bit data.\n"); |
| close(audio_fd); |
| return 0; |
| } |
| } |
| else |
| { |
| perror("/dev/dsp"); |
| Con_Printf("%d-bit sound not supported.", shm->samplebits); |
| close(audio_fd); |
| return 0; |
| } |
| |
| // toggle the trigger & start her up |
| |
| tmp = 0; |
| rc = ioctl(audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp); |
| if (rc < 0) |
| { |
| perror("/dev/dsp"); |
| Con_Printf("Could not toggle.\n"); |
| close(audio_fd); |
| return 0; |
| } |
| tmp = PCM_ENABLE_OUTPUT; |
| rc = ioctl(audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp); |
| if (rc < 0) |
| { |
| perror("/dev/dsp"); |
| Con_Printf("Could not toggle.\n"); |
| close(audio_fd); |
| return 0; |
| } |
| |
| shm->samplepos = 0; |
| |
| snd_inited = 1; |
| return 1; |
| |
| } |
| |
| int SNDDMA_GetDMAPos(void) |
| { |
| |
| struct count_info count; |
| |
| if (!snd_inited) return 0; |
| |
| if (ioctl(audio_fd, SNDCTL_DSP_GETOPTR, &count)==-1) |
| { |
| perror("/dev/dsp"); |
| Con_Printf("Uh, sound dead.\n"); |
| close(audio_fd); |
| snd_inited = 0; |
| return 0; |
| } |
| // shm->samplepos = (count.bytes / (shm->samplebits / 8)) & (shm->samples-1); |
| // fprintf(stderr, "%d \r", count.ptr); |
| shm->samplepos = count.ptr / (shm->samplebits / 8); |
| |
| return shm->samplepos; |
| |
| } |
| |
| void SNDDMA_Shutdown(void) |
| { |
| if (snd_inited) |
| { |
| close(audio_fd); |
| snd_inited = 0; |
| } |
| } |
| |
| /* |
| ============== |
| SNDDMA_Submit |
| |
| Send sound to device if buffer isn't really the dma buffer |
| =============== |
| */ |
| void SNDDMA_Submit(void) |
| { |
| } |
| |