ref: cd8c8d416b4245458460cfe8e3c00bcb69c3c45b
dir: /snd_9.c/
#include <u.h> #include <libc.h> #include <stdio.h> #include "quakedef.h" int audio_fd; int snd_inited; int wpos; int tryrates[] = { 11025, 22051, 44100, 8000 }; qboolean SNDDMA_Init(void) { int i; snd_inited = 0; if((audio_fd = open("/dev/audio", OWRITE)) < 0){ Sys_Warn("SNDDMA_Init:open"); Con_Printf("Could not open /dev/audio\n"); return 0; } shm = &sn; shm->splitbuffer = 0; if((i = COM_CheckParm("-sndbits")) != 0) shm->samplebits = atoi(com_argv[i+1]); if(shm->samplebits != 16 && shm->samplebits != 8) shm->samplebits = 16; if((i = COM_CheckParm("-sndspeed")) != 0) shm->speed = atoi(com_argv[i+1]); else shm->speed = 44100; shm->channels = 2; if(COM_CheckParm("-sndmono") != 0) shm->channels = 1; //else if(COM_CheckParm("-sndstereo") != 0) // shm->channels = 2; //shm->samples = info.fragstotal * info.fragsize / (shm->samplebits/8); shm->samples = 1024; shm->submission_chunk = 1; /* FIXME: use Hunk_AllocName? */ if((shm->buffer = mallocz(shm->samplebits/8 * shm->samples, 1)) == nil){ Sys_Warn("SNDDMA_Init:malloc"); close(audio_fd); return 0; } shm->samplepos = 0; snd_inited = 1; return 1; } int SNDDMA_GetDMAPos(void) { if (!snd_inited) return 0; /* FIXME: utter bullshit */ //shm->samplepos = count.bytes/shm->samplebits/8 & shm->samples-1; //shm->samplepos = count.ptr / (shm->samplebits / 8); shm->samplepos = wpos / shm->samplebits/8 & shm->samples-1; //wpos = 0; return shm->samplepos; } void SNDDMA_Shutdown(void) { if(snd_inited){ close(audio_fd); free(shm->buffer); snd_inited = 0; } } void SNDDMA_Submit(void) { int n; /* FIXME: utter bullshit */ if((n = write(audio_fd, shm->buffer, shm->samplebits/8 * shm->samples)) < 0){ Sys_Warn("SNDDMA_Submit:write"); SNDDMA_Shutdown(); } wpos += n; }