diff options
Diffstat (limited to 'apps/plugins/sdl/progs/quake/snd_dma.c')
| -rw-r--r-- | apps/plugins/sdl/progs/quake/snd_dma.c | 1021 |
1 files changed, 1021 insertions, 0 deletions
diff --git a/apps/plugins/sdl/progs/quake/snd_dma.c b/apps/plugins/sdl/progs/quake/snd_dma.c new file mode 100644 index 0000000000..4c42f32d49 --- /dev/null +++ b/apps/plugins/sdl/progs/quake/snd_dma.c @@ -0,0 +1,1021 @@ +/* +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. + +*/ +// snd_dma.c -- main control for any streaming sound output device + +#include "quakedef.h" + +#ifdef _WIN32 +#include "winquake.h" +#endif + +void S_Play(void); +void S_PlayVol(void); +void S_SoundList(void); +void S_Update_(); +void S_StopAllSounds(qboolean clear); +void S_StopAllSoundsC(void); + +// ======================================================================= +// Internal sound data & structures +// ======================================================================= + +channel_t channels[MAX_CHANNELS]; +int total_channels; + +int snd_blocked = 0; +static qboolean snd_ambient = 1; +qboolean snd_initialized = false; + +// pointer should go away +volatile dma_t *shm = 0; +volatile dma_t sn; + +vec3_t listener_origin; +vec3_t listener_forward; +vec3_t listener_right; +vec3_t listener_up; +vec_t sound_nominal_clip_dist=1000.0; + +int soundtime; // sample PAIRS +int paintedtime; // sample PAIRS + + +#define MAX_SFX 512 +sfx_t *known_sfx; // hunk allocated [MAX_SFX] +int num_sfx; + +sfx_t *ambient_sfx[NUM_AMBIENTS]; + +// lowest rockbox supported +int desired_speed = SAMPR_16; +int desired_bits = 16; + +int sound_started=0; + +cvar_t bgmvolume = {"bgmvolume", "1", true}; +cvar_t volume = {"volume", "0.7", true}; + +cvar_t nosound = {"nosound", "0"}; +cvar_t precache = {"precache", "1"}; +cvar_t loadas8bit = {"loadas8bit", "0"}; +cvar_t bgmbuffer = {"bgmbuffer", "4096"}; +cvar_t ambient_level = {"ambient_level", "0.3"}; +cvar_t ambient_fade = {"ambient_fade", "100"}; +cvar_t snd_noextraupdate = {"snd_noextraupdate", "0"}; +cvar_t snd_show = {"snd_show", "0"}; +cvar_t _snd_mixahead = {"_snd_mixahead", "0.1", true}; + + +// ==================================================================== +// User-setable variables +// ==================================================================== + + +// +// Fake dma is a synchronous faking of the DMA progress used for +// isolating performance in the renderer. The fakedma_updates is +// number of times S_Update() is called per second. +// + +qboolean fakedma = false; +int fakedma_updates = 15; + + +void S_AmbientOff (void) +{ + snd_ambient = false; +} + + +void S_AmbientOn (void) +{ + snd_ambient = true; +} + + +void S_SoundInfo_f(void) +{ + if (!sound_started || !shm) + { + Con_Printf ("sound system not started\n"); + return; + } + + Con_Printf("%5d stereo\n", shm->channels - 1); + Con_Printf("%5d samples\n", shm->samples); + Con_Printf("%5d samplepos\n", shm->samplepos); + Con_Printf("%5d samplebits\n", shm->samplebits); + Con_Printf("%5d submission_chunk\n", shm->submission_chunk); + Con_Printf("%5d speed\n", shm->speed); + Con_Printf("0x%x dma buffer\n", shm->buffer); + Con_Printf("%5d total_channels\n", total_channels); +} + + +/* +================ +S_Startup +================ +*/ + +void S_Startup (void) +{ + int rc; + + if (!snd_initialized) + return; + + if (!fakedma) + { + rc = SNDDMA_Init(); + + if (!rc) + { +#ifndef _WIN32 + Con_Printf("S_Startup: SNDDMA_Init failed.\n"); +#endif + sound_started = 0; + return; + } + } + + sound_started = 1; +} + + +/* +================ +S_Init +================ +*/ +void S_Init (void) +{ + + Con_Printf("\nSound Initialization\n"); + + if (COM_CheckParm("-nosound")) + return; + + if (COM_CheckParm("-simsound")) + fakedma = true; + + Cmd_AddCommand("play", S_Play); + Cmd_AddCommand("playvol", S_PlayVol); + Cmd_AddCommand("stopsound", S_StopAllSoundsC); + Cmd_AddCommand("soundlist", S_SoundList); + Cmd_AddCommand("soundinfo", S_SoundInfo_f); + + Cvar_RegisterVariable(&nosound); + Cvar_RegisterVariable(&volume); + Cvar_RegisterVariable(&precache); + Cvar_RegisterVariable(&loadas8bit); + Cvar_RegisterVariable(&bgmvolume); + Cvar_RegisterVariable(&bgmbuffer); + Cvar_RegisterVariable(&ambient_level); + Cvar_RegisterVariable(&ambient_fade); + Cvar_RegisterVariable(&snd_noextraupdate); + Cvar_RegisterVariable(&snd_show); + Cvar_RegisterVariable(&_snd_mixahead); + + if (host_parms.memsize < 0x800000) + { + Cvar_Set ("loadas8bit", "1"); + Con_Printf ("loading all sounds as 8bit\n"); + } + + + + snd_initialized = true; + + S_Startup (); + + known_sfx = Hunk_AllocName (MAX_SFX*sizeof(sfx_t), "sfx_t"); + num_sfx = 0; + +// create a piece of DMA memory + + if (fakedma) + { + shm = (void *) Hunk_AllocName(sizeof(*shm), "shm"); + shm->splitbuffer = 0; + shm->samplebits = 16; + shm->speed = 22050; + shm->channels = 2; + shm->samples = 32768; + shm->samplepos = 0; + shm->soundalive = true; + shm->gamealive = true; + shm->submission_chunk = 1; + shm->buffer = Hunk_AllocName(1<<16, "shmbuf"); + } + + if ( shm ) { + Con_Printf ("Sound sampling rate: %i\n", shm->speed); + } + + // provides a tick sound until washed clean + +// if (shm->buffer) +// shm->buffer[4] = shm->buffer[5] = 0x7f; // force a pop for debugging + + ambient_sfx[AMBIENT_WATER] = S_PrecacheSound ("ambience/water1.wav"); + ambient_sfx[AMBIENT_SKY] = S_PrecacheSound ("ambience/wind2.wav"); + + S_StopAllSounds (true); +} + + +// ======================================================================= +// Shutdown sound engine +// ======================================================================= + +void S_Shutdown(void) +{ + + if (!sound_started) + return; + + if (shm) + shm->gamealive = 0; + + shm = 0; + sound_started = 0; + + if (!fakedma) + { + SNDDMA_Shutdown(); + } +} + + +// ======================================================================= +// Load a sound +// ======================================================================= + +/* +================== +S_FindName + +================== +*/ +sfx_t *S_FindName (char *name) +{ + int i; + sfx_t *sfx; + + if (!name) + Sys_Error ("S_FindName: NULL\n"); + + if (Q_strlen(name) >= MAX_QPATH) + Sys_Error ("Sound name too long: %s", name); + +// see if already loaded + for (i=0 ; i < num_sfx ; i++) + if (!Q_strcmp(known_sfx[i].name, name)) + { + return &known_sfx[i]; + } + + if (num_sfx == MAX_SFX) + Sys_Error ("S_FindName: out of sfx_t"); + + sfx = &known_sfx[i]; + strcpy (sfx->name, name); + + num_sfx++; + + return sfx; +} + + +/* +================== +S_TouchSound + +================== +*/ +void S_TouchSound (char *name) +{ + sfx_t *sfx; + + if (!sound_started) + return; + + sfx = S_FindName (name); + Cache_Check (&sfx->cache); +} + +/* +================== +S_PrecacheSound + +================== +*/ +sfx_t *S_PrecacheSound (char *name) +{ + sfx_t *sfx; + + if (!sound_started || nosound.value) + return NULL; + + sfx = S_FindName (name); + +// cache it in + if (precache.value) + S_LoadSound (sfx); + + return sfx; +} + + +//============================================================================= + +/* +================= +SND_PickChannel +================= +*/ +channel_t *SND_PickChannel(int entnum, int entchannel) +{ + int ch_idx; + int first_to_die; + int life_left; + +// Check for replacement sound, or find the best one to replace + first_to_die = -1; + life_left = 0x7fffffff; + for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++) + { + if (entchannel != 0 // channel 0 never overrides + && channels[ch_idx].entnum == entnum + && (channels[ch_idx].entchannel == entchannel || entchannel == -1) ) + { // allways override sound from same entity + first_to_die = ch_idx; + break; + } + + // don't let monster sounds override player sounds + if (channels[ch_idx].entnum == cl.viewentity && entnum != cl.viewentity && channels[ch_idx].sfx) + continue; + + if (channels[ch_idx].end - paintedtime < life_left) + { + life_left = channels[ch_idx].end - paintedtime; + first_to_die = ch_idx; + } + } + + if (first_to_die == -1) + return NULL; + + if (channels[first_to_die].sfx) + channels[first_to_die].sfx = NULL; + + return &channels[first_to_die]; +} + +/* +================= +SND_Spatialize +================= +*/ +void SND_Spatialize(channel_t *ch) +{ + vec_t dot; + vec_t ldist, rdist, dist; + vec_t lscale, rscale, scale; + vec3_t source_vec; + sfx_t *snd; + +// anything coming from the view entity will allways be full volume + if (ch->entnum == cl.viewentity) + { + ch->leftvol = ch->master_vol; + ch->rightvol = ch->master_vol; + return; + } + +// calculate stereo seperation and distance attenuation + + snd = ch->sfx; + VectorSubtract(ch->origin, listener_origin, source_vec); + + dist = VectorNormalize(source_vec) * ch->dist_mult; + + dot = DotProduct(listener_right, source_vec); + + if (shm->channels == 1) + { + rscale = 1.0; + lscale = 1.0; + } + else + { + rscale = 1.0 + dot; + lscale = 1.0 - dot; + } + +// add in distance effect + scale = (1.0 - dist) * rscale; + ch->rightvol = (int) (ch->master_vol * scale); + if (ch->rightvol < 0) + ch->rightvol = 0; + + scale = (1.0 - dist) * lscale; + ch->leftvol = (int) (ch->master_vol * scale); + if (ch->leftvol < 0) + ch->leftvol = 0; +} + + +// ======================================================================= +// Start a sound effect +// ======================================================================= + +void S_StartSound(int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation) +{ + channel_t *target_chan, *check; + sfxcache_t *sc; + int vol; + int ch_idx; + int skip; + + if (!sound_started) + return; + + if (!sfx) + return; + + if (nosound.value) + return; + + vol = fvol*255; + +// pick a channel to play on + target_chan = SND_PickChannel(entnum, entchannel); + if (!target_chan) + return; + +// spatialize + memset (target_chan, 0, sizeof(*target_chan)); + VectorCopy(origin, target_chan->origin); + target_chan->dist_mult = attenuation / sound_nominal_clip_dist; + target_chan->master_vol = vol; + target_chan->entnum = entnum; + target_chan->entchannel = entchannel; + SND_Spatialize(target_chan); + + if (!target_chan->leftvol && !target_chan->rightvol) + return; // not audible at all + +// new channel + sc = S_LoadSound (sfx); + if (!sc) + { + target_chan->sfx = NULL; + return; // couldn't load the sound's data + } + + target_chan->sfx = sfx; + target_chan->pos = 0.0; + target_chan->end = paintedtime + sc->length; + +// if an identical sound has also been started this frame, offset the pos +// a bit to keep it from just making the first one louder + check = &channels[NUM_AMBIENTS]; + for (ch_idx=NUM_AMBIENTS ; ch_idx < NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS ; ch_idx++, check++) + { + if (check == target_chan) + continue; + if (check->sfx == sfx && !check->pos) + { + skip = rand () % (int)(0.1*shm->speed); + if (skip >= target_chan->end) + skip = target_chan->end - 1; + target_chan->pos += skip; + target_chan->end -= skip; + break; + } + + } +} + +void S_StopSound(int entnum, int entchannel) +{ + int i; + + for (i=0 ; i<MAX_DYNAMIC_CHANNELS ; i++) + { + if (channels[i].entnum == entnum + && channels[i].entchannel == entchannel) + { + channels[i].end = 0; + channels[i].sfx = NULL; + return; + } + } +} + +void S_StopAllSounds(qboolean clear) +{ + int i; + + if (!sound_started) + return; + + total_channels = MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS; // no statics + + for (i=0 ; i<MAX_CHANNELS ; i++) + if (channels[i].sfx) + channels[i].sfx = NULL; + + Q_memset(channels, 0, MAX_CHANNELS * sizeof(channel_t)); + + if (clear) + S_ClearBuffer (); +} + +void S_StopAllSoundsC (void) +{ + S_StopAllSounds (true); +} + +void S_ClearBuffer (void) +{ + int clear; + +#ifdef _WIN32 + if (!sound_started || !shm || (!shm->buffer && !pDSBuf)) +#else + if (!sound_started || !shm || !shm->buffer) +#endif + return; + + if (shm->samplebits == 8) + clear = 0x80; + else + clear = 0; + +#ifdef _WIN32 + if (pDSBuf) + { + DWORD dwSize; + DWORD *pData; + int reps; + HRESULT hresult; + + reps = 0; + + while ((hresult = pDSBuf->lpVtbl->Lock(pDSBuf, 0, gSndBufSize, &pData, &dwSize, NULL, NULL, 0)) != DS_OK) + { + if (hresult != DSERR_BUFFERLOST) + { + Con_Printf ("S_ClearBuffer: DS::Lock Sound Buffer Failed\n"); + S_Shutdown (); + return; + } + + if (++reps > 10000) + { + Con_Printf ("S_ClearBuffer: DS: couldn't restore buffer\n"); + S_Shutdown (); + return; + } + } + + Q_memset(pData, clear, shm->samples * shm->samplebits/8); + + pDSBuf->lpVtbl->Unlock(pDSBuf, pData, dwSize, NULL, 0); + + } + else +#endif + { + Q_memset(shm->buffer, clear, shm->samples * shm->samplebits/8); + } +} + + +/* +================= +S_StaticSound +================= +*/ +void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation) +{ + channel_t *ss; + sfxcache_t *sc; + + if (!sfx) + return; + + if (total_channels == MAX_CHANNELS) + { + Con_Printf ("total_channels == MAX_CHANNELS\n"); + return; + } + + ss = &channels[total_channels]; + total_channels++; + + sc = S_LoadSound (sfx); + if (!sc) + return; + + if (sc->loopstart == -1) + { + Con_Printf ("Sound %s not looped\n", sfx->name); + return; + } + + ss->sfx = sfx; + VectorCopy (origin, ss->origin); + ss->master_vol = vol; + ss->dist_mult = (attenuation/64) / sound_nominal_clip_dist; + ss->end = paintedtime + sc->length; + + SND_Spatialize (ss); +} + + +//============================================================================= + +/* +=================== +S_UpdateAmbientSounds +=================== +*/ +void S_UpdateAmbientSounds (void) +{ + mleaf_t *l; + float vol; + int ambient_channel; + channel_t *chan; + + if (!snd_ambient) + return; + +// calc ambient sound levels + if (!cl.worldmodel) + return; + + l = Mod_PointInLeaf (listener_origin, cl.worldmodel); + if (!l || !ambient_level.value) + { + for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++) + channels[ambient_channel].sfx = NULL; + return; + } + + for (ambient_channel = 0 ; ambient_channel< NUM_AMBIENTS ; ambient_channel++) + { + chan = &channels[ambient_channel]; + chan->sfx = ambient_sfx[ambient_channel]; + + vol = ambient_level.value * l->ambient_sound_level[ambient_channel]; + if (vol < 8) + vol = 0; + + // don't adjust volume too fast + if (chan->master_vol < vol) + { + chan->master_vol += host_frametime * ambient_fade.value; + if (chan->master_vol > vol) + chan->master_vol = vol; + } + else if (chan->master_vol > vol) + { + chan->master_vol -= host_frametime * ambient_fade.value; + if (chan->master_vol < vol) + chan->master_vol = vol; + } + + chan->leftvol = chan->rightvol = chan->master_vol; + } +} + + +/* +============ +S_Update + +Called once each time through the main loop +============ +*/ +void S_Update(vec3_t origin, vec3_t forward, vec3_t right, vec3_t up) +{ + int i, j; + int total; + channel_t *ch; + channel_t *combine; + + if (!sound_started || (snd_blocked > 0)) + return; + + VectorCopy(origin, listener_origin); + VectorCopy(forward, listener_forward); + VectorCopy(right, listener_right); + VectorCopy(up, listener_up); + +// update general area ambient sound sources + S_UpdateAmbientSounds (); + + combine = NULL; + +// update spatialization for static and dynamic sounds + ch = channels+NUM_AMBIENTS; + for (i=NUM_AMBIENTS ; i<total_channels; i++, ch++) + { + if (!ch->sfx) + continue; + SND_Spatialize(ch); // respatialize channel + if (!ch->leftvol && !ch->rightvol) + continue; + + // try to combine static sounds with a previous channel of the same + // sound effect so we don't mix five torches every frame + + if (i >= MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS) + { + // see if it can just use the last one + if (combine && combine->sfx == ch->sfx) + { + combine->leftvol += ch->leftvol; + combine->rightvol += ch->rightvol; + ch->leftvol = ch->rightvol = 0; + continue; + } + // search for one + combine = channels+MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS; + for (j=MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS ; j<i; j++, combine++) + if (combine->sfx == ch->sfx) + break; + + if (j == total_channels) + { + combine = NULL; + } + else + { + if (combine != ch) + { + combine->leftvol += ch->leftvol; + combine->rightvol += ch->rightvol; + ch->leftvol = ch->rightvol = 0; + } + continue; + } + } + + + } + +// +// debugging output +// + if (snd_show.value) + { + total = 0; + ch = channels; + for (i=0 ; i<total_channels; i++, ch++) + if (ch->sfx && (ch->leftvol || ch->rightvol) ) + { + //Con_Printf ("%3i %3i %s\n", ch->leftvol, ch->rightvol, ch->sfx->name); + total++; + } + + Con_Printf ("----(%i)----\n", total); + } + +// mix some sound + S_Update_(); +} + +void GetSoundtime(void) +{ + int samplepos; + static int buffers; + static int oldsamplepos; + int fullsamples; + + fullsamples = shm->samples / shm->channels; + +// it is possible to miscount buffers if it has wrapped twice between +// calls to S_Update. Oh well. +#ifdef __sun__ + soundtime = SNDDMA_GetSamples(); +#else + samplepos = SNDDMA_GetDMAPos(); + + + if (samplepos < oldsamplepos) + { + buffers++; // buffer wrapped + + if (paintedtime > 0x40000000) + { // time to chop things off to avoid 32 bit limits + buffers = 0; + paintedtime = fullsamples; + S_StopAllSounds (true); + } + } + oldsamplepos = samplepos; + + soundtime = buffers*fullsamples + samplepos/shm->channels; +#endif +} + +void S_ExtraUpdate (void) +{ + +#ifdef _WIN32 + IN_Accumulate (); +#endif + + if (snd_noextraupdate.value) + return; // don't pollute timings + S_Update_(); +} + +void S_Update_(void) +{ +#ifndef SDL + + unsigned endtime; + int samps; + + if (!sound_started || (snd_blocked > 0)) + return; + +// Updates DMA time + GetSoundtime(); + +// check to make sure that we haven't overshot + if (paintedtime < soundtime) + { + //Con_Printf ("S_Update_ : overflow\n"); + paintedtime = soundtime; + } + +// mix ahead of current position + endtime = soundtime + _snd_mixahead.value * shm->speed; + samps = shm->samples >> (shm->channels-1); + if (endtime - soundtime > samps) + endtime = soundtime + samps; + +#ifdef _WIN32 +// if the buffer was lost or stopped, restore it and/or restart it + { + DWORD dwStatus; + + if (pDSBuf) + { + if (pDSBuf->lpVtbl->GetStatus (pDSBuf, &dwStatus) != DD_OK) + Con_Printf ("Couldn't get sound buffer status\n"); + + if (dwStatus & DSBSTATUS_BUFFERLOST) + pDSBuf->lpVtbl->Restore (pDSBuf); + + if (!(dwStatus & DSBSTATUS_PLAYING)) + pDSBuf->lpVtbl->Play(pDSBuf, 0, 0, DSBPLAY_LOOPING); + } + } +#endif + + S_PaintChannels (endtime); + + SNDDMA_Submit (); +#endif /* ! SDL */ +} + +/* +=============================================================================== + +console functions + +=============================================================================== +*/ + +void S_Play(void) +{ + static int hash=345; + int i; + char name[256]; + sfx_t *sfx; + + i = 1; + while (i<Cmd_Argc()) + { + if (!Q_strrchr(Cmd_Argv(i), '.')) + { + Q_strcpy(name, Cmd_Argv(i)); + Q_strcat(name, ".wav"); + } + else + Q_strcpy(name, Cmd_Argv(i)); + sfx = S_PrecacheSound(name); + S_StartSound(hash++, 0, sfx, listener_origin, 1.0, 1.0); + i++; + } +} + +void S_PlayVol(void) +{ + static int hash=543; + int i; + float vol; + char name[256]; + sfx_t *sfx; + + i = 1; + while (i<Cmd_Argc()) + { + if (!Q_strrchr(Cmd_Argv(i), '.')) + { + Q_strcpy(name, Cmd_Argv(i)); + Q_strcat(name, ".wav"); + } + else + Q_strcpy(name, Cmd_Argv(i)); + sfx = S_PrecacheSound(name); + vol = Q_atof(Cmd_Argv(i+1)); + S_StartSound(hash++, 0, sfx, listener_origin, vol, 1.0); + i+=2; + } +} + +void S_SoundList(void) +{ + int i; + sfx_t *sfx; + sfxcache_t *sc; + int size, total; + + total = 0; + for (sfx=known_sfx, i=0 ; i<num_sfx ; i++, sfx++) + { + sc = Cache_Check (&sfx->cache); + if (!sc) + continue; + size = sc->length*sc->width*(sc->stereo+1); + total += size; + if (sc->loopstart >= 0) + Con_Printf ("L"); + else + Con_Printf (" "); + Con_Printf("(%2db) %6i : %s\n",sc->width*8, size, sfx->name); + } + Con_Printf ("Total resident: %i\n", total); +} + + +void S_LocalSound (char *sound) +{ + sfx_t *sfx; + + if (nosound.value) + return; + if (!sound_started) + return; + + sfx = S_PrecacheSound (sound); + if (!sfx) + { + Con_Printf ("S_LocalSound: can't cache %s\n", sound); + return; + } + S_StartSound (cl.viewentity, -1, sfx, vec3_origin, 1, 1); +} + + +void S_ClearPrecache (void) +{ +} + + +void S_BeginPrecaching (void) +{ +} + + +void S_EndPrecaching (void) +{ +} + |