+++ /dev/null
-/***********************************************************
-* Rocks'n'Diamonds -- McDuffin Strikes Back! *
-*----------------------------------------------------------*
-* (c) 1995-98 Artsoft Entertainment *
-* Holger Schemel *
-* Oststrasse 11a *
-* 33604 Bielefeld *
-* phone: ++49 +521 290471 *
-* email: aeglos@valinor.owl.de *
-*----------------------------------------------------------*
-* sound.c *
-***********************************************************/
-
-#include "sound.h"
-#include "misc.h"
-
-/*** THE STUFF BELOW IS ONLY USED BY THE SOUND SERVER CHILD PROCESS ***/
-
-static int playing_sounds = 0;
-static struct SoundControl playlist[MAX_SOUNDS_PLAYING];
-static struct SoundControl emptySoundControl =
-{
- -1,0,0, FALSE,FALSE,FALSE,FALSE,FALSE, 0,0L,0L,NULL
-};
-
-#if defined(PLATFORM_UNIX)
-static int stereo_volume[PSND_MAX_LEFT2RIGHT+1];
-static char premix_first_buffer[SND_BLOCKSIZE];
-#if defined(AUDIO_STREAMING_DSP)
-static char premix_left_buffer[SND_BLOCKSIZE];
-static char premix_right_buffer[SND_BLOCKSIZE];
-static int premix_last_buffer[SND_BLOCKSIZE];
-#endif
-static unsigned char playing_buffer[SND_BLOCKSIZE];
-#endif
-
-/* forward declaration of internal functions */
-#if defined(AUDIO_STREAMING_DSP)
-static void SoundServer_InsertNewSound(struct SoundControl);
-#elif defined(PLATFORM_UNIX)
-static unsigned char linear_to_ulaw(int);
-static int ulaw_to_linear(unsigned char);
-#endif
-
-#if defined(PLATFORM_HPUX)
-static void HPUX_Audio_Control();
-#endif
-
-#if defined(PLATFORM_MSDOS)
-static void SoundServer_InsertNewSound(struct SoundControl);
-static void SoundServer_StopSound(int);
-static void SoundServer_StopAllSounds();
-#endif
-
-#if defined(PLATFORM_UNIX)
-int OpenAudioDevice(char *audio_device_name)
-{
- int audio_fd;
-
- /* check if desired audio device is accessible */
- if (access(sound_device_name, W_OK) != 0)
- return -1;
-
- /* try to open audio device in non-blocking mode */
- if ((audio_fd = open(audio_device_name, O_WRONLY | O_NONBLOCK)) < 0)
- return audio_fd;
-
- /* re-open audio device in blocking mode */
- close(audio_fd);
- audio_fd = open(audio_device_name, O_WRONLY);
-
- return audio_fd;
-}
-
-void UnixOpenAudio(struct AudioSystemInfo *audio)
-{
- static char *audio_device_name[] =
- {
- DEVICENAME_DSP,
- DEVICENAME_AUDIO
- };
- int audio_fd;
- int i;
-
- /* look for available audio devices, starting with preferred ones */
- for (i=0; i<sizeof(audio_device_name)/sizeof(char *); i++)
- if ((audio_fd = OpenAudioDevice(sound_device_name)) >= 0)
- break;
-
- if (audio_fd < 0)
- {
- Error(ERR_WARN, "cannot open audio device - no sound");
- return;
- }
-
- close(audio_fd);
-
- audio->sound_available = TRUE;
-
-#if defined(AUDIO_STREAMING_DSP)
- audio->loops_available = TRUE;
-#endif
-}
-
-void UnixCloseAudio(struct AudioSystemInfo *audio)
-{
- if (audio->device_fd)
- close(audio->device_fd);
-}
-
-#endif /* PLATFORM_UNIX */
-
-void SoundServer()
-{
- int i;
-#if defined(PLATFORM_UNIX)
- struct SoundControl snd_ctrl;
- fd_set sound_fdset;
-
- close(audio.soundserver_pipe[1]); /* no writing into pipe needed */
-#endif
-
- for(i=0;i<MAX_SOUNDS_PLAYING;i++)
- playlist[i] = emptySoundControl;
- playing_sounds = 0;
-
-#if defined(PLATFORM_UNIX)
- stereo_volume[PSND_MAX_LEFT2RIGHT] = 0;
- for(i=0;i<PSND_MAX_LEFT2RIGHT;i++)
- stereo_volume[i] =
- (int)sqrt((float)(PSND_MAX_LEFT2RIGHT*PSND_MAX_LEFT2RIGHT-i*i));
-
-#if defined(PLATFORM_HPUX)
- HPUX_Audio_Control();
-#endif
-
- FD_ZERO(&sound_fdset);
- FD_SET(audio.soundserver_pipe[0], &sound_fdset);
-
- while(1) /* wait for sound playing commands from client */
- {
- FD_SET(audio.soundserver_pipe[0], &sound_fdset);
- select(audio.soundserver_pipe[0] + 1, &sound_fdset, NULL, NULL, NULL);
- if (!FD_ISSET(audio.soundserver_pipe[0], &sound_fdset))
- continue;
- if (read(audio.soundserver_pipe[0], &snd_ctrl, sizeof(snd_ctrl))
- != sizeof(snd_ctrl))
- Error(ERR_EXIT_SOUND_SERVER, "broken pipe - no sounds");
-
-#if defined(AUDIO_STREAMING_DSP)
-
- if (snd_ctrl.fade_sound)
- {
- if (!playing_sounds)
- continue;
-
- for(i=0;i<MAX_SOUNDS_PLAYING;i++)
- if (snd_ctrl.stop_all_sounds || playlist[i].nr == snd_ctrl.nr)
- playlist[i].fade_sound = TRUE;
- }
- else if (snd_ctrl.stop_all_sounds)
- {
- if (!playing_sounds)
- continue;
-
- for(i=0;i<MAX_SOUNDS_PLAYING;i++)
- playlist[i]=emptySoundControl;
- playing_sounds=0;
-
- close(audio.device_fd);
- }
- else if (snd_ctrl.stop_sound)
- {
- if (!playing_sounds)
- continue;
-
- for(i=0;i<MAX_SOUNDS_PLAYING;i++)
- if (playlist[i].nr == snd_ctrl.nr)
- {
- playlist[i]=emptySoundControl;
- playing_sounds--;
- }
-
- if (!playing_sounds)
- close(audio.device_fd);
- }
-
- if (playing_sounds || snd_ctrl.active)
- {
- struct timeval delay = { 0, 0 };
- byte *sample_ptr;
- long sample_size;
- static long max_sample_size = 0;
- static long fragment_size = 0;
- /* Even if the stereo flag is used as being boolean, it must be
- defined as an integer, else 'ioctl()' will fail! */
- int stereo = TRUE;
-#if 0
- int sample_rate = 8000;
-#else
- int sample_rate = 22050;
-#endif
-
- if (playing_sounds ||
- (audio.device_fd = OpenAudioDevice(sound_device_name)) >= 0)
- {
- if (!playing_sounds) /* we just opened the audio device */
- {
- /* 2 buffers / 512 bytes, giving 1/16 second resolution */
- /* (with stereo the effective buffer size will shrink to 256) */
- fragment_size = 0x00020009;
-
- if (ioctl(audio.device_fd,SNDCTL_DSP_SETFRAGMENT,&fragment_size) < 0)
- Error(ERR_EXIT_SOUND_SERVER,
- "cannot set fragment size of /dev/dsp - no sounds");
-
- /* try if we can use stereo sound */
- if (ioctl(audio.device_fd, SNDCTL_DSP_STEREO, &stereo) < 0)
- {
-#ifdef DEBUG
- static boolean reported = FALSE;
-
- if (!reported)
- {
- Error(ERR_RETURN, "cannot get stereo sound on /dev/dsp");
- reported = TRUE;
- }
-#endif
- stereo = FALSE;
- }
-
- if (ioctl(audio.device_fd, SNDCTL_DSP_SPEED, &sample_rate) < 0)
- Error(ERR_EXIT_SOUND_SERVER,
- "cannot set sample rate of /dev/dsp - no sounds");
-
- /* get the real fragmentation size; this should return 512 */
- if (ioctl(audio.device_fd, SNDCTL_DSP_GETBLKSIZE,&fragment_size) < 0)
- Error(ERR_EXIT_SOUND_SERVER,
- "cannot get fragment size of /dev/dsp - no sounds");
-
- max_sample_size = fragment_size / (stereo ? 2 : 1);
- }
-
- if (snd_ctrl.active) /* new sound has arrived */
- SoundServer_InsertNewSound(snd_ctrl);
-
- while(playing_sounds &&
- select(audio.soundserver_pipe[0] + 1,
- &sound_fdset, NULL, NULL, &delay) < 1)
- {
- FD_SET(audio.soundserver_pipe[0], &sound_fdset);
-
- /* first clear the last premixing buffer */
- memset(premix_last_buffer,0,fragment_size*sizeof(int));
-
- for(i=0;i<MAX_SOUNDS_PLAYING;i++)
- {
- int j;
-
- if (!playlist[i].active)
- continue;
-
- /* get pointer and size of the actual sound sample */
- sample_ptr = playlist[i].data_ptr+playlist[i].playingpos;
- sample_size =
- MIN(max_sample_size,playlist[i].data_len-playlist[i].playingpos);
- playlist[i].playingpos += sample_size;
-
- /* fill the first mixing buffer with original sample */
- memcpy(premix_first_buffer,sample_ptr,sample_size);
-
- /* are we about to restart a looping sound? */
- if (playlist[i].loop && sample_size<max_sample_size)
- {
- playlist[i].playingpos = max_sample_size-sample_size;
- memcpy(premix_first_buffer+sample_size,
- playlist[i].data_ptr,max_sample_size-sample_size);
- sample_size = max_sample_size;
- }
-
- /* decrease volume if sound is fading out */
- if (playlist[i].fade_sound &&
- playlist[i].volume>=PSND_MAX_VOLUME/10)
- playlist[i].volume-=PSND_MAX_VOLUME/20;
-
- /* adjust volume of actual sound sample */
- if (playlist[i].volume != PSND_MAX_VOLUME)
- for(j=0;j<sample_size;j++)
- premix_first_buffer[j] =
- (playlist[i].volume * (int)premix_first_buffer[j])
- >> PSND_MAX_VOLUME_BITS;
-
- /* fill the last mixing buffer with stereo or mono sound */
- if (stereo)
- {
- int middle_pos = PSND_MAX_LEFT2RIGHT/2;
- int left_volume = stereo_volume[middle_pos+playlist[i].stereo];
- int right_volume = stereo_volume[middle_pos-playlist[i].stereo];
-
- for(j=0;j<sample_size;j++)
- {
- premix_left_buffer[j] =
- (left_volume * (int)premix_first_buffer[j])
- >> PSND_MAX_LEFT2RIGHT_BITS;
- premix_right_buffer[j] =
- (right_volume * (int)premix_first_buffer[j])
- >> PSND_MAX_LEFT2RIGHT_BITS;
- premix_last_buffer[2*j+0] += premix_left_buffer[j];
- premix_last_buffer[2*j+1] += premix_right_buffer[j];
- }
- }
- else
- {
- for(j=0;j<sample_size;j++)
- premix_last_buffer[j] += (int)premix_first_buffer[j];
- }
-
- /* delete completed sound entries from the playlist */
- if (playlist[i].playingpos >= playlist[i].data_len)
- {
- if (playlist[i].loop)
- playlist[i].playingpos = 0;
- else
- {
- playlist[i] = emptySoundControl;
- playing_sounds--;
- }
- }
- else if (playlist[i].volume <= PSND_MAX_VOLUME/10)
- {
- playlist[i] = emptySoundControl;
- playing_sounds--;
- }
- }
-
- /* put last mixing buffer to final playing buffer */
- for(i=0;i<fragment_size;i++)
- {
- if (premix_last_buffer[i]<-255)
- playing_buffer[i] = 0;
- else if (premix_last_buffer[i]>255)
- playing_buffer[i] = 255;
- else
- playing_buffer[i] = (premix_last_buffer[i]>>1)^0x80;
- }
-
- /* finally play the sound fragment */
- write(audio.device_fd, playing_buffer,fragment_size);
- }
-
- /* if no sounds playing, free device for other sound programs */
- if (!playing_sounds)
- close(audio.device_fd);
- }
- }
-
-#else /* !AUDIO_STREAMING_DSP */
-
- if (snd_ctrl.active && !snd_ctrl.loop)
- {
- struct timeval delay = { 0, 0 };
- byte *sample_ptr;
- long sample_size, max_sample_size = SND_BLOCKSIZE;
- long sample_rate = 8000; /* standard "/dev/audio" sampling rate */
- int wait_percent = 90; /* wait 90% of the real playing time */
- int i;
-
- if ((audio.device_fd = OpenAudioDevice(sound_device_name)) >= 0)
- {
- playing_sounds = 1;
-
- while(playing_sounds &&
- select(audio.soundserver_pipe[0] + 1,
- &sound_fdset, NULL, NULL, &delay) < 1)
- {
- FD_SET(audio.soundserver_pipe[0], &sound_fdset);
-
- /* get pointer and size of the actual sound sample */
- sample_ptr = snd_ctrl.data_ptr + snd_ctrl.playingpos;
- sample_size =
- MIN(max_sample_size, snd_ctrl.data_len - snd_ctrl.playingpos);
- snd_ctrl.playingpos += sample_size;
-
- /* fill the first mixing buffer with original sample */
- memcpy(premix_first_buffer,sample_ptr,sample_size);
-
-
- /* adjust volume of actual sound sample */
- if (snd_ctrl.volume != PSND_MAX_VOLUME)
- for(i=0;i<sample_size;i++)
- premix_first_buffer[i] =
- (snd_ctrl.volume * (int)premix_first_buffer[i])
- >> PSND_MAX_VOLUME_BITS;
-
- for(i=0;i<sample_size;i++)
- playing_buffer[i] =
- linear_to_ulaw(((int)premix_first_buffer[i]) << 8);
-
- if (snd_ctrl.playingpos >= snd_ctrl.data_len)
- playing_sounds = 0;
-
- /* finally play the sound fragment */
- write(audio.device_fd,playing_buffer,sample_size);
-
- delay.tv_sec = 0;
- delay.tv_usec = ((sample_size*10*wait_percent)/(sample_rate))*1000;
- }
- close(audio.device_fd);
- }
- }
-
-#endif /* !AUDIO_STREAMING_DSP */
-
- }
-
-#endif /* PLATFORM_UNIX */
-
-}
-
-#if defined(PLATFORM_MSDOS)
-static void sound_handler(struct SoundControl snd_ctrl)
-{
- int i;
-
- if (snd_ctrl.fade_sound)
- {
- if (!playing_sounds)
- return;
-
- for (i=0; i<MAX_SOUNDS_PLAYING; i++)
- if ((snd_ctrl.stop_all_sounds || playlist[i].nr == snd_ctrl.nr) &&
- !playlist[i].fade_sound)
- {
- playlist[i].fade_sound = TRUE;
- if (voice_check(playlist[i].voice))
- voice_ramp_volume(playlist[i].voice, 1000, 0);
- playlist[i].loop = PSND_NO_LOOP;
- }
- }
- else if (snd_ctrl.stop_all_sounds)
- {
- if (!playing_sounds)
- return;
- SoundServer_StopAllSounds();
- }
- else if (snd_ctrl.stop_sound)
- {
- if (!playing_sounds)
- return;
- SoundServer_StopSound(snd_ctrl.nr);
- }
-
- for (i=0; i<MAX_SOUNDS_PLAYING; i++)
- {
- if (!playlist[i].active || playlist[i].loop)
- continue;
-
- playlist[i].playingpos = voice_get_position(playlist[i].voice);
- playlist[i].volume = voice_get_volume(playlist[i].voice);
- if (playlist[i].playingpos == -1 || !playlist[i].volume)
- {
- deallocate_voice(playlist[i].voice);
- playlist[i] = emptySoundControl;
- playing_sounds--;
- }
- }
-
- if (snd_ctrl.active)
- SoundServer_InsertNewSound(snd_ctrl);
-}
-#endif /* PLATFORM_MSDOS */
-
-#if !defined(PLATFORM_WIN32)
-static void SoundServer_InsertNewSound(struct SoundControl snd_ctrl)
-{
- int i, k;
-
- /* if playlist is full, remove oldest sound */
- if (playing_sounds==MAX_SOUNDS_PLAYING)
- {
- int longest=0, longest_nr=0;
-
- for(i=0;i<MAX_SOUNDS_PLAYING;i++)
- {
-#if !defined(PLATFORM_MSDOS)
- int actual = 100 * playlist[i].playingpos / playlist[i].data_len;
-#else
- int actual = playlist[i].playingpos;
-#endif
-
- if (!playlist[i].loop && actual>longest)
- {
- longest=actual;
- longest_nr=i;
- }
- }
-#if defined(PLATFORM_MSDOS)
- voice_set_volume(playlist[longest_nr].voice, 0);
- deallocate_voice(playlist[longest_nr].voice);
-#endif
- playlist[longest_nr] = emptySoundControl;
- playing_sounds--;
- }
-
- /* check if sound is already being played (and how often) */
- for(k=0,i=0;i<MAX_SOUNDS_PLAYING;i++)
- {
- if (playlist[i].nr == snd_ctrl.nr)
- k++;
- }
-
- /* restart loop sounds only if they are just fading out */
- if (k>=1 && snd_ctrl.loop)
- {
- for(i=0;i<MAX_SOUNDS_PLAYING;i++)
- {
- if (playlist[i].nr == snd_ctrl.nr && playlist[i].fade_sound)
- {
- playlist[i].fade_sound = FALSE;
- playlist[i].volume = PSND_MAX_VOLUME;
-#if defined(PLATFORM_MSDOS)
- playlist[i].loop = PSND_LOOP;
- voice_stop_volumeramp(playlist[i].voice);
- voice_ramp_volume(playlist[i].voice, playlist[i].volume, 1000);
-#endif
- }
- }
- return;
- }
-
- /* don't play sound more than n times simultaneously (with n == 2 for now) */
- if (k>=2)
- {
- int longest=0, longest_nr=0;
-
- /* look for oldest equal sound */
- for(i=0;i<MAX_SOUNDS_PLAYING;i++)
- {
- int actual;
-
- if (!playlist[i].active || playlist[i].nr != snd_ctrl.nr)
- continue;
-
-#if !defined(PLATFORM_MSDOS)
- actual = 100 * playlist[i].playingpos / playlist[i].data_len;
-#else
- actual = playlist[i].playingpos;
-#endif
- if (actual>=longest)
- {
- longest=actual;
- longest_nr=i;
- }
- }
-
-#if defined(PLATFORM_MSDOS)
- voice_set_volume(playlist[longest_nr].voice, 0);
- deallocate_voice(playlist[longest_nr].voice);
-#endif
- playlist[longest_nr] = emptySoundControl;
- playing_sounds--;
- }
-
- /* neuen Sound in Liste packen */
- for(i=0;i<MAX_SOUNDS_PLAYING;i++)
- {
- if (!playlist[i].active)
- {
- playlist[i] = snd_ctrl;
- playing_sounds++;
-
-#if defined(PLATFORM_MSDOS)
- playlist[i].voice = allocate_voice(Sound[snd_ctrl.nr].sample_ptr);
- if(snd_ctrl.loop)
- voice_set_playmode(playlist[i].voice, PLAYMODE_LOOP);
- voice_set_volume(playlist[i].voice, snd_ctrl.volume);
- voice_set_pan(playlist[i].voice, snd_ctrl.stereo);
- voice_start(playlist[i].voice);
-#endif
- break;
- }
- }
-}
-#endif /* !PLATFORM_WIN32 */
-
-/*
-void SoundServer_FadeSound(int nr)
-{
- int i;
-
- if (!playing_sounds)
- return;
-
- for(i=0;i<MAX_SOUNDS_PLAYING;i++)
- if (snd_ctrl.stop_all_sounds || playlist[i].nr == snd_ctrl.nr)
- playlist[i].fade_sound = TRUE;
-}
-*/
-
-#if !defined(PLATFORM_WIN32)
-#if defined(PLATFORM_MSDOS)
-static void SoundServer_StopSound(int nr)
-{
- int i;
-
- if (!playing_sounds)
- return;
-
- for(i=0;i<MAX_SOUNDS_PLAYING;i++)
- if (playlist[i].nr == nr)
- {
-#if defined(PLATFORM_MSDOS)
- voice_set_volume(playlist[i].voice, 0);
- deallocate_voice(playlist[i].voice);
-#endif
- playlist[i] = emptySoundControl;
- playing_sounds--;
- }
-
-#if !defined(PLATFORM_MSDOS)
- if (!playing_sounds)
- close(audio.device_fd);
-#endif
-}
-
-static void SoundServer_StopAllSounds()
-{
- int i;
-
- for(i=0;i<MAX_SOUNDS_PLAYING;i++)
- {
-#if defined(PLATFORM_MSDOS)
- voice_set_volume(playlist[i].voice, 0);
- deallocate_voice(playlist[i].voice);
-#endif
- playlist[i]=emptySoundControl;
- }
- playing_sounds = 0;
-
-#if !defined(PLATFORM_MSDOS)
- close(audio.device_fd);
-#endif
-}
-#endif /* PLATFORM_MSDOS */
-#endif /* !PLATFORM_WIN32 */
-
-#if defined(PLATFORM_HPUX)
-static void HPUX_Audio_Control()
-{
- struct audio_describe ainfo;
- int audio_ctl;
-
- audio_ctl = open("/dev/audioCtl", O_WRONLY | O_NDELAY);
- if (audio_ctl == -1)
- Error(ERR_EXIT_SOUND_SERVER, "cannot open /dev/audioCtl - no sounds");
-
- if (ioctl(audio_ctl, AUDIO_DESCRIBE, &ainfo) == -1)
- Error(ERR_EXIT_SOUND_SERVER, "no audio info - no sounds");
-
- if (ioctl(audio_ctl, AUDIO_SET_DATA_FORMAT, AUDIO_FORMAT_ULAW) == -1)
- Error(ERR_EXIT_SOUND_SERVER, "ulaw audio not available - no sounds");
-
- ioctl(audio_ctl, AUDIO_SET_CHANNELS, 1);
- ioctl(audio_ctl, AUDIO_SET_SAMPLE_RATE, 8000);
-
- close(audio_ctl);
-}
-#endif /* PLATFORM_HPUX */
-
-#if defined(PLATFORM_UNIX) && !defined(AUDIO_STREAMING_DSP)
-
-/* these two are stolen from "sox"... :) */
-
-/*
-** This routine converts from linear to ulaw.
-**
-** Craig Reese: IDA/Supercomputing Research Center
-** Joe Campbell: Department of Defense
-** 29 September 1989
-**
-** References:
-** 1) CCITT Recommendation G.711 (very difficult to follow)
-** 2) "A New Digital Technique for Implementation of Any
-** Continuous PCM Companding Law," Villeret, Michel,
-** et al. 1973 IEEE Int. Conf. on Communications, Vol 1,
-** 1973, pg. 11.12-11.17
-** 3) MIL-STD-188-113,"Interoperability and Performance Standards
-** for Analog-to_Digital Conversion Techniques,"
-** 17 February 1987
-**
-** Input: Signed 16 bit linear sample
-** Output: 8 bit ulaw sample
-*/
-
-#define ZEROTRAP /* turn on the trap as per the MIL-STD */
-#define BIAS 0x84 /* define the add-in bias for 16 bit samples */
-#define CLIP 32635
-
-static unsigned char linear_to_ulaw(int sample)
-{
- static int exp_lut[256] =
- {
- 0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,
- 4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
- 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
- 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
- 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
- 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
- 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
- 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
- };
-
- int sign, exponent, mantissa;
- unsigned char ulawbyte;
-
- /* Get the sample into sign-magnitude. */
- sign = (sample >> 8) & 0x80; /* set aside the sign */
- if (sign != 0)
- sample = -sample; /* get magnitude */
- if (sample > CLIP)
- sample = CLIP; /* clip the magnitude */
-
- /* Convert from 16 bit linear to ulaw. */
- sample = sample + BIAS;
- exponent = exp_lut[( sample >> 7 ) & 0xFF];
- mantissa = ( sample >> ( exponent + 3 ) ) & 0x0F;
- ulawbyte = ~ ( sign | ( exponent << 4 ) | mantissa );
-#ifdef ZEROTRAP
- if (ulawbyte == 0)
- ulawbyte = 0x02; /* optional CCITT trap */
-#endif
-
- return(ulawbyte);
-}
-
-/*
-** This routine converts from ulaw to 16 bit linear.
-**
-** Craig Reese: IDA/Supercomputing Research Center
-** 29 September 1989
-**
-** References:
-** 1) CCITT Recommendation G.711 (very difficult to follow)
-** 2) MIL-STD-188-113,"Interoperability and Performance Standards
-** for Analog-to_Digital Conversion Techniques,"
-** 17 February 1987
-**
-** Input: 8 bit ulaw sample
-** Output: signed 16 bit linear sample
-*/
-
-static int ulaw_to_linear(unsigned char ulawbyte)
-{
- static int exp_lut[8] = { 0, 132, 396, 924, 1980, 4092, 8316, 16764 };
- int sign, exponent, mantissa, sample;
-
- ulawbyte = ~ ulawbyte;
- sign = ( ulawbyte & 0x80 );
- exponent = ( ulawbyte >> 4 ) & 0x07;
- mantissa = ulawbyte & 0x0F;
- sample = exp_lut[exponent] + ( mantissa << ( exponent + 3 ) );
- if (sign != 0)
- sample = -sample;
-
- return(sample);
-}
-#endif /* PLATFORM_UNIX && !AUDIO_STREAMING_DSP */
-
-/*** THE STUFF ABOVE IS ONLY USED BY THE SOUND SERVER CHILD PROCESS ***/
-
-/*===========================================================================*/
-
-/*** THE STUFF BELOW IS ONLY USED BY THE MAIN PROCESS ***/
-
-#define CHUNK_ID_LEN 4 /* IFF style chunk id length */
-#define WAV_HEADER_SIZE 20 /* size of WAV file header */
-
-boolean LoadSound(struct SampleInfo *snd_info)
-{
- char filename[256];
- char *sound_ext = "wav";
-#if !defined(TARGET_SDL)
-#if !defined(PLATFORM_MSDOS)
- byte sound_header_buffer[WAV_HEADER_SIZE];
- char chunk[CHUNK_ID_LEN + 1];
- int chunk_length, dummy;
- FILE *file;
- int i;
-#endif
-#endif
-
- sprintf(filename, "%s/%s/%s.%s",
- options.ro_base_directory, SOUNDS_DIRECTORY,
- snd_info->name, sound_ext);
-
-#if defined(TARGET_SDL)
-
- snd_info->mix_chunk = Mix_LoadWAV(filename);
- if (snd_info->mix_chunk == NULL)
- {
- Error(ERR_WARN, "cannot read sound file '%s' - no sounds", filename);
- return FALSE;
- }
-
-#else /* !TARGET_SDL */
-
-#if !defined(PLATFORM_MSDOS)
-
- if ((file = fopen(filename, "r")) == NULL)
- {
- Error(ERR_WARN, "cannot open sound file '%s' - no sounds", filename);
- return FALSE;
- }
-
- /* read chunk "RIFF" */
- getFileChunk(file, chunk, &chunk_length, BYTE_ORDER_LITTLE_ENDIAN);
- if (strcmp(chunk, "RIFF") != 0)
- {
- Error(ERR_WARN, "missing 'RIFF' chunk of sound file '%s'", filename);
- fclose(file);
- return FALSE;
- }
-
- /* read chunk "WAVE" */
- getFileChunk(file, chunk, &dummy, BYTE_ORDER_LITTLE_ENDIAN);
- if (strcmp(chunk, "WAVE") != 0)
- {
- Error(ERR_WARN, "missing 'WAVE' chunk of sound file '%s'", filename);
- fclose(file);
- return FALSE;
- }
-
- /* read header information */
- for (i=0; i<WAV_HEADER_SIZE; i++)
- sound_header_buffer[i] = fgetc(file);
-
- /* read chunk "data" */
- getFileChunk(file, chunk, &chunk_length, BYTE_ORDER_LITTLE_ENDIAN);
- if (strcmp(chunk, "data") != 0)
- {
- Error(ERR_WARN, "missing 'data' chunk of sound file '%s'", filename);
- fclose(file);
- return FALSE;
- }
-
- snd_info->data_len = chunk_length;
- snd_info->data_ptr = checked_malloc(snd_info->data_len);
-
- /* read sound data */
- if (fread(snd_info->data_ptr, 1, snd_info->data_len, file) !=
- snd_info->data_len)
- {
- Error(ERR_WARN, "cannot read sound file '%s' - no sounds", filename);
- fclose(file);
- return FALSE;
- }
-
- fclose(file);
-
- for (i=0; i<snd_info->data_len; i++)
- snd_info->data_ptr[i] = snd_info->data_ptr[i] ^ 0x80;
-
-#else /* PLATFORM_MSDOS */
-
- snd_info->sample_ptr = load_sample(filename);
- if (!snd_info->sample_ptr)
- {
- Error(ERR_WARN, "cannot read sound file '%s' - no sounds", filename);
- return FALSE;
- }
-
-#endif /* PLATFORM_MSDOS */
-#endif /* !TARGET_SDL */
-
- return TRUE;
-}
-
-void PlaySound(int nr)
-{
- PlaySoundExt(nr, PSND_MAX_VOLUME, PSND_MIDDLE, PSND_NO_LOOP);
-}
-
-void PlaySoundStereo(int nr, int stereo)
-{
- PlaySoundExt(nr, PSND_MAX_VOLUME, stereo, PSND_NO_LOOP);
-}
-
-void PlaySoundLoop(int nr)
-{
- PlaySoundExt(nr, PSND_MAX_VOLUME, PSND_MIDDLE, PSND_LOOP);
-}
-
-void PlaySoundExt(int nr, int volume, int stereo, boolean loop)
-{
- struct SoundControl snd_ctrl = emptySoundControl;
-
- if (!audio.sound_available || !setup.sound)
- return;
-
- if (volume<PSND_MIN_VOLUME)
- volume = PSND_MIN_VOLUME;
- else if (volume>PSND_MAX_VOLUME)
- volume = PSND_MAX_VOLUME;
-
- if (stereo<PSND_MAX_LEFT)
- stereo = PSND_MAX_LEFT;
- else if (stereo>PSND_MAX_RIGHT)
- stereo = PSND_MAX_RIGHT;
-
- snd_ctrl.nr = nr;
- snd_ctrl.volume = volume;
- snd_ctrl.stereo = stereo;
- snd_ctrl.loop = loop;
- snd_ctrl.active = TRUE;
- snd_ctrl.data_ptr = Sound[nr].data_ptr;
- snd_ctrl.data_len = Sound[nr].data_len;
-
-#if defined(TARGET_SDL)
-
- Mix_Volume(-1, SDL_MIX_MAXVOLUME / 4);
- Mix_VolumeMusic(SDL_MIX_MAXVOLUME / 4);
-
- Mix_PlayChannel(-1, Sound[nr].mix_chunk, (loop ? -1 : 0));
-
-#else
-#if !defined(PLATFORM_MSDOS)
- if (write(audio.soundserver_pipe[1], &snd_ctrl, sizeof(snd_ctrl)) < 0)
- {
- Error(ERR_WARN, "cannot pipe to child process - no sounds");
- audio.sound_available = FALSE;
- return;
- }
-#else
- sound_handler(snd_ctrl);
-#endif
-#endif
-}
-
-void FadeSound(int nr)
-{
- StopSoundExt(nr, SSND_FADE_SOUND);
-}
-
-void FadeSounds()
-{
- StopSoundExt(-1, SSND_FADE_ALL_SOUNDS);
-}
-
-void StopSound(int nr)
-{
- StopSoundExt(nr, SSND_STOP_SOUND);
-}
-
-void StopSounds()
-{
- StopSoundExt(-1, SSND_STOP_ALL_SOUNDS);
-}
-
-void StopSoundExt(int nr, int method)
-{
- struct SoundControl snd_ctrl = emptySoundControl;
-
- if (!audio.sound_available)
- return;
-
- if (SSND_FADING(method))
- snd_ctrl.fade_sound = TRUE;
-
- if (SSND_ALL(method))
- snd_ctrl.stop_all_sounds = TRUE;
- else
- {
- snd_ctrl.nr = nr;
- snd_ctrl.stop_sound = TRUE;
- }
-
-#if defined(TARGET_SDL)
-
- if (SSND_FADING(method))
- {
- Mix_FadeOutChannel(-1, 1000);
- Mix_FadeOutMusic(1000);
- }
- else
- {
- Mix_HaltChannel(-1);
- Mix_HaltMusic();
- }
-
-#else
-#if !defined(PLATFORM_MSDOS)
- if (write(audio.soundserver_pipe[1], &snd_ctrl, sizeof(snd_ctrl)) < 0)
- {
- Error(ERR_WARN, "cannot pipe to child process - no sounds");
- audio.sound_available = FALSE;
- return;
- }
-#else
- sound_handler(snd_ctrl);
-#endif
-#endif
-}
-
-void FreeSounds(int num_sounds)
-{
- int i;
-
- if (!audio.sound_available)
- return;
-
- for(i=0; i<num_sounds; i++)
-#if !defined(PLATFORM_MSDOS)
- free(Sound[i].data_ptr);
-#else
- destroy_sample(Sound[i].sample_ptr);
-#endif
-}
-
-/*** THE STUFF ABOVE IS ONLY USED BY THE MAIN PROCESS ***/
projects / rocksndiamonds.git / blobdiff