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1.1.1.8 ! root 1: /* 1.1 root 2: * UAE - The Un*x Amiga Emulator 1.1.1.8 ! root 3: * 1.1 root 4: * Support for Linux/USS sound 1.1.1.8 ! root 5: * 1.1 root 6: * Copyright 1997 Bernd Schmidt 7: */ 8: 9: #include "sysconfig.h" 10: #include "sysdeps.h" 11: 12: #include "config.h" 13: #include "options.h" 14: #include "memory.h" 1.1.1.4 root 15: #include "events.h" 1.1 root 16: #include "custom.h" 17: #include "gensound.h" 18: #include "sounddep/sound.h" 19: 20: #include <sys/ioctl.h> 21: 22: #ifdef HAVE_SYS_SOUNDCARD_H 23: #include <sys/soundcard.h> 24: #elif defined HAVE_MACHINE_SOUNDCARD_H 25: #include <machine/soundcard.h> 26: #else 27: #error "Something went wrong during configuration." 28: #endif 29: 30: int sound_fd; 1.1.1.3 root 31: static int have_sound = 0; 1.1 root 32: static unsigned long formats; 33: 34: uae_u16 sndbuffer[44100]; 35: uae_u16 *sndbufpt; 36: int sndbufsize; 37: 1.1.1.2 root 38: static int exact_log2 (int v) 1.1 root 39: { 40: int l = 0; 41: while ((v >>= 1) != 0) 42: l++; 43: return l; 44: } 45: 1.1.1.2 root 46: void close_sound (void) 1.1 root 47: { 48: if (have_sound) 1.1.1.2 root 49: close (sound_fd); 1.1 root 50: } 51: 1.1.1.3 root 52: /* Try to determine whether sound is available. This is only for GUI purposes. */ 1.1.1.2 root 53: int setup_sound (void) 1.1 root 54: { 55: sound_fd = open ("/dev/dsp", O_WRONLY); 1.1.1.3 root 56: 57: sound_available = 0; 58: 59: if (sound_fd < 0) { 60: perror ("Can't open /dev/dsp"); 61: if (errno == EBUSY) { 62: /* We can hope, can't we ;) */ 63: sound_available = 1; 64: return 1; 65: } 1.1 root 66: return 0; 1.1.1.3 root 67: } 1.1 root 68: 69: if (ioctl (sound_fd, SNDCTL_DSP_GETFMTS, &formats) == -1) { 1.1.1.3 root 70: perror ("ioctl failed - can't use sound"); 71: close (sound_fd); 1.1 root 72: return 0; 73: } 74: 75: sound_available = 1; 1.1.1.3 root 76: close (sound_fd); 1.1 root 77: return 1; 78: } 79: 80: int init_sound (void) 81: { 82: int tmp; 83: int rate; 84: int dspbits; 85: 1.1.1.3 root 86: sound_fd = open ("/dev/dsp", O_WRONLY); 87: have_sound = !(sound_fd < 0); 88: if (! have_sound) { 89: perror ("Can't open /dev/dsp"); 90: if (errno != EBUSY) 91: sound_available = 0; 92: return 0; 93: } 94: if (ioctl (sound_fd, SNDCTL_DSP_GETFMTS, &formats) == -1) { 95: perror ("ioctl failed - can't use sound"); 96: close (sound_fd); 97: have_sound = 0; 98: return 0; 99: } 100: 1.1 root 101: if (currprefs.sound_maxbsiz < 128 || currprefs.sound_maxbsiz > 16384) { 1.1.1.2 root 102: fprintf (stderr, "Sound buffer size %d out of range.\n", currprefs.sound_maxbsiz); 1.1 root 103: currprefs.sound_maxbsiz = 8192; 104: } 105: 1.1.1.2 root 106: tmp = 0x00040000 + exact_log2 (currprefs.sound_maxbsiz); 1.1 root 107: ioctl (sound_fd, SNDCTL_DSP_SETFRAGMENT, &tmp); 108: ioctl (sound_fd, SNDCTL_DSP_GETBLKSIZE, &sndbufsize); 109: 110: dspbits = currprefs.sound_bits; 111: ioctl (sound_fd, SNDCTL_DSP_SAMPLESIZE, &dspbits); 112: ioctl (sound_fd, SOUND_PCM_READ_BITS, &dspbits); 113: if (dspbits != currprefs.sound_bits) { 1.1.1.2 root 114: fprintf (stderr, "Can't use sound with %d bits\n", currprefs.sound_bits); 1.1 root 115: return 0; 116: } 117: 1.1.1.7 root 118: tmp = currprefs.sound_stereo; 1.1 root 119: ioctl (sound_fd, SNDCTL_DSP_STEREO, &tmp); 120: 121: rate = currprefs.sound_freq; 122: ioctl (sound_fd, SNDCTL_DSP_SPEED, &rate); 123: ioctl (sound_fd, SOUND_PCM_READ_RATE, &rate); 124: /* Some soundcards have a bit of tolerance here. */ 125: if (rate < currprefs.sound_freq * 90 / 100 || rate > currprefs.sound_freq * 110 / 100) { 1.1.1.2 root 126: fprintf (stderr, "Can't use sound with desired frequency %d\n", currprefs.sound_freq); 1.1 root 127: return 0; 128: } 129: 1.1.1.5 root 130: scaled_sample_evtime = (unsigned long)MAXHPOS_PAL * MAXVPOS_PAL * VBLANK_HZ_PAL * CYCLE_UNIT / rate; 1.1.1.4 root 131: scaled_sample_evtime_ok = 1; 1.1 root 132: 133: if (dspbits == 16) { 134: /* Will this break horribly on bigendian machines? Possible... */ 135: if (!(formats & AFMT_S16_LE)) 136: return 0; 137: init_sound_table16 (); 1.1.1.7 root 138: sample_handler = currprefs.sound_stereo ? sample16s_handler : sample16_handler; 1.1 root 139: } else { 140: if (!(formats & AFMT_U8)) 141: return 0; 142: init_sound_table8 (); 1.1.1.7 root 143: sample_handler = currprefs.sound_stereo ? sample8s_handler : sample8_handler; 1.1 root 144: } 145: sound_available = 1; 146: printf ("Sound driver found and configured for %d bits at %d Hz, buffer is %d bytes\n", 147: dspbits, rate, sndbufsize); 148: sndbufpt = sndbuffer; 1.1.1.8 ! root 149: 1.1 root 150: return 1; 151: }
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