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/*
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.

$Id: snd_dma.c,v 1.48 2007-09-26 21:51:34 tonik Exp $
*/
// snd_dma.c -- main control for any streaming sound output device

#include "quakedef.h"
#include "qsound.h"
#include "utils.h"
#define SELF_SOUND 0xFFEFFFFF // [EZH] Fan told me 0xFFEFFFFF is damn cool value for it :P

#ifdef _WIN32
#include "winquake.h"
#include "movie.h" //joe: capturing audio
#endif

#ifdef FTE_PEXT2_VOICECHAT
#include "input.h"
#endif

//dimman
#if defined(__linux__) || defined(__FreeBSD__)
qsoundhandler_t *qsoundhandler;
#endif

static void OnChange_s_khz (cvar_t *var, char *string, qbool *cancel);
static void S_Play_f (void);
static void S_PlayVol_f (void);
static void S_MuteSound_f (void);
static void S_SoundList_f (void);
static void S_Update_ ();
static void S_StopAllSounds_f (void);
static void S_Register_LatchCvars(void);

void IN_Accumulate (void); // S_ExtraUpdate use it
void S_RawClear(void);
void S_RawAudio(int sourceid, byte *data, unsigned int speed, unsigned int samples, unsigned int channelsnum, unsigned int width);

// =======================================================================
// Internal sound data & structures
// =======================================================================

channel_t channels[MAX_CHANNELS];
unsigned int total_channels;

int snd_blocked = 0;

qbool snd_initialized = false;
qbool snd_started = false;

int soundtime;
int paintedtime;

volatile dma_t sn;
volatile dma_t *shm = NULL;


static vec3_t listener_origin;
static vec3_t listener_forward;
static vec3_t listener_right;
static vec3_t listener_up;
#define sound_nominal_clip_dist 1000.0

// during registration it is possible to have more sounds
// than could actually be referenced during gameplay,
// because we don't want to free anything until we are
// sure we won't need it.

#define MAX_SFX (MAX_SOUNDS*2) // 256 * 2 = 512

static sfx_t *known_sfx = NULL; // hunk allocated [MAX_SFX]
static int num_sfx;

static qbool sound_spatialized = false;

static sfx_t *ambient_sfx[NUM_AMBIENTS];

// ====================================================================
// User-setable variables
// ====================================================================


cvar_t bgmvolume = {"bgmvolume", "1"}; // CD music volume
cvar_t s_volume = {"volume", "0.7"};
cvar_t s_raw_volume = {"s_raw_volume", "1"};
cvar_t s_nosound = {"s_nosound", "0"};
cvar_t s_precache = {"s_precache", "1"};
cvar_t s_loadas8bit = {"s_loadas8bit", "0"};
cvar_t s_ambientlevel = {"s_ambientlevel", "0.3"};
cvar_t s_ambientfade = {"s_ambientfade", "100"};
cvar_t s_noextraupdate = {"s_noextraupdate", "0"};
cvar_t s_show = {"s_show", "0"};
cvar_t s_mixahead = {"s_mixahead", "0.1"};
cvar_t s_swapstereo = {"s_swapstereo", "0"};
cvar_t s_linearresample = {"s_linearresample", "0", CVAR_LATCH};
cvar_t s_linearresample_stream = {"s_linearresample_stream", "0"};
cvar_t s_khz = {"s_khz", "11", CVAR_NONE, OnChange_s_khz}; // If > 11, default sounds are noticeably different.

#if defined(__FreeBSD__) || defined(__linux__)
cvar_t s_stereo = {"s_stereo", "1", CVAR_LATCH};
cvar_t s_bits = {"s_bits", "16", CVAR_LATCH};
cvar_t s_oss_device = {"s_oss_device", "/dev/dsp", CVAR_LATCH};
cvar_t s_alsa_device = {"s_alsa_device", "default", CVAR_LATCH};
cvar_t s_alsa_latency = {"s_alsa_latency", "0.04", CVAR_LATCH};
cvar_t s_alsa_noworkaround = {"s_alsa_noworkaround", "0", CVAR_LATCH};
cvar_t s_uselegacydrivers = {"s_uselegacydrivers", "0", CVAR_LATCH};
#ifdef WITH_PULSEAUDIO
cvar_t s_pulseaudio_latency = {"s_pulseaudio_latency", "0.04", CVAR_LATCH};
#endif
#endif

#ifdef __linux__
cvar_t s_driver = {"s_driver", "alsa", CVAR_LATCH};
#endif

#ifdef __FreeBSD__
cvar_t s_driver = {"s_driver", "oss", CVAR_LATCH};
#endif

// ====================================================================
// Voice communication
// ====================================================================

#ifdef FTE_PEXT2_VOICECHAT

static void S_Voip_Enable_f(void);
static void S_Voip_Disable_f(void);
static void S_Voip_f(void);

static void S_Voip_Play_Callback(cvar_t *var, char *string, qbool *cancel);
// Sends voice-over-ip data to the server whenever it is set.
cvar_t cl_voip_send = {"cl_voip_send", "0"};
// This is the threshhold for voice-activation-detection when sending voip data.
cvar_t cl_voip_vad_threshhold = {"cl_voip_vad_threshhold", "15"};
// Keeps sending voice data for this many seconds after voice activation would normally stop.
cvar_t cl_voip_vad_delay = {"cl_voip_vad_delay", "0.3"};
// Volume multiplier applied while capturing, to avoid your audio from being heard by others.
cvar_t cl_voip_capturingvol = {"cl_voip_capturingvol", "0.5"};
// Shows your speach volume above the hud. 0=hide, 1=show when transmitting, 2=ignore voice-activation disable.
cvar_t cl_voip_showmeter = {"cl_voip_showmeter", "1"};
cvar_t cl_voip_showmeter_x = {"cl_voip_showmeter_x", "0"};
cvar_t cl_voip_showmeter_y = {"cl_voip_showmeter_y", "0"};
// Enables voip playback.
cvar_t cl_voip_play = {"cl_voip_play", "1", CVAR_NONE, S_Voip_Play_Callback};
// Amplifies your microphone when using voip.
cvar_t cl_voip_micamp = {"cl_voip_micamp", "2"};
// Record VOIP in demo.
cvar_t cl_voip_demorecord = {"cl_voip_demorecord", "1"};
#endif

static void S_SoundInfo_f (void)
{
if (!shm) {
Com_Printf ("sound system not started\n");
return;
}
#if defined(__linux__) || defined(__FreeBSD__)
if(qsoundhandler)
Com_Printf("driver: %s\n", qsoundhandler->name);
#endif
Com_Printf("%5d speakers\n", shm->format.channels);
#if defined(__linux__) || defined(__FreeBSD__)
// shm->sampleframes not set/used in ALSA/Pulseaudio
// OSS(legacy) still sets it, but it isn't used outside of OSS(legacy).
// So don't read sampleframes from shm, but calculate it instead.
Com_Printf("%5d frames\n", shm->samples / shm->format.channels);
#else
Com_Printf("%5d frames\n", shm->sampleframes);
#endif
Com_Printf("%5d samples\n", shm->samples);
Com_Printf("%5d samplepos\n", shm->samplepos);
Com_Printf("%5d samplebits\n", shm->format.width * 8);
Com_Printf("%5d speed\n", shm->format.speed);
Com_Printf("%p dma buffer\n", shm->buffer);
Com_Printf("%5u total_channels\n", total_channels);
}


static qbool S_Startup (void)
{
if (!snd_initialized)
return false;

shm = &sn;
memset((void *)shm, 0, sizeof(*shm));

S_RawClear();
S_Register_LatchCvars();

///////////////////////////////////////////////
// Sound driver choosing. Linux/FreeBSD only

#if defined(__linux__) || defined(__FreeBSD__)
qsoundhandler = malloc(sizeof(*qsoundhandler));
char *audio_driver = Cvar_String("s_driver");
qbool retval = false;

if(qsoundhandler) {
if(strcmp(audio_driver, "alsa")==0) {
if(s_uselegacydrivers.value) {
retval = SNDDMA_Init_ALSA_Legacy(qsoundhandler);
} else {
retval = SNDDMA_Init_ALSA(qsoundhandler);
}

#ifdef WITH_PULSEAUDIO
} else if(strcmp(audio_driver, "pulseaudio")==0 || strcmp(audio_driver, "pulse")==0) {
retval = SNDDMA_Init_PULSEAUDIO(qsoundhandler);
#endif
} else if(strcmp(audio_driver, "oss")==0) {
if(s_uselegacydrivers.value) {
retval = SNDDMA_Init_OSS_Legacy(qsoundhandler);
} else {
retval = SNDDMA_Init_OSS(qsoundhandler);
}
}
else {
Com_DPrintf("SNDDMA_Init: Error, unknown s_driver \"%s\"\n", audio_driver);
}
}
if(!retval) {
Com_Printf("[sound] Failed to startup (s_driver %s)\n", s_driver.string);
if((!s_uselegacydrivers.value) && ((strcmp(audio_driver, "alsa")==0) || (strcmp(audio_driver, "oss")==0)))
Com_Printf("Try s_uselegacydriver 1 to use legacy %s driver.\n", audio_driver);
shm = NULL;
sound_spatialized = false;
snd_started = false;
free(qsoundhandler);
return false;
} else {
Com_Printf("[sound] %s started....\n", qsoundhandler->name);
}
////////////////////////////////////////////////////
#else
if (!SNDDMA_Init()) {
Com_Printf ("S_Startup: SNDDMA_Init failed.\n");
shm = NULL;
snd_started = false;
sound_spatialized = false;
return false;
}
#endif

ambient_sfx[AMBIENT_WATER] = S_PrecacheSound ("ambience/water1.wav");
ambient_sfx[AMBIENT_SKY] = S_PrecacheSound ("ambience/wind2.wav");
S_StopAllSounds (true);

snd_started = true;
return true;
}

void S_Shutdown (void)
{
if (!shm)
return;

Cache_Flush(); // dimman: Moved this line and next here from S_Restart_f
S_StopAllSounds (true);

#if defined(__linux__) || defined(__FreeBSD__)
Com_Printf("[sound] %s shutdown...\n", qsoundhandler->name);
qsoundhandler->Shutdown();
free(qsoundhandler);
qsoundhandler = NULL;
#else
SNDDMA_Shutdown();
#endif

shm = NULL;
snd_started = false;
sound_spatialized = false;
}

static void S_Restart_f (void)
{
Com_DPrintf("Restarting sound system....\n");
S_Shutdown();
S_Startup();
}

static void OnChange_s_khz (cvar_t *var, char *string, qbool *cancel) {
Cbuf_AddText("s_restart\n");
}

static void S_Register_RegularCvarsAndCommands(void)
{
Cvar_SetCurrentGroup(CVAR_GROUP_SOUND);
Cvar_Register(&bgmvolume);
Cvar_Register(&s_volume);
Cvar_Register(&s_raw_volume);
Cvar_Register(&s_nosound);
Cvar_Register(&s_precache);
Cvar_Register(&s_loadas8bit);
Cvar_Register(&s_khz);
Cvar_Register(&s_ambientlevel);
Cvar_Register(&s_ambientfade);
Cvar_Register(&s_noextraupdate);
Cvar_Register(&s_show);
Cvar_Register(&s_mixahead);
Cvar_Register(&s_swapstereo);
Cvar_Register(&s_linearresample_stream);

#ifdef FTE_PEXT2_VOICECHAT
Cvar_Register(&cl_voip_send);
Cvar_Register(&cl_voip_vad_threshhold);
Cvar_Register(&cl_voip_vad_delay);
Cvar_Register(&cl_voip_capturingvol);
Cvar_Register(&cl_voip_showmeter);
Cvar_Register(&cl_voip_showmeter_x);
Cvar_Register(&cl_voip_showmeter_y);
Cvar_Register(&cl_voip_play);
Cvar_Register(&cl_voip_micamp);
Cvar_Register(&cl_voip_demorecord);

Cmd_AddCommand("+voip", S_Voip_Enable_f);
Cmd_AddCommand("-voip", S_Voip_Disable_f);
Cmd_AddCommand("voip", S_Voip_f);
#endif
Cvar_ResetCurrentGroup();

// compatibility with old configs
Cmd_AddLegacyCommand("nosound", "s_nosound");
Cmd_AddLegacyCommand("precache", "s_precache");
Cmd_AddLegacyCommand("loadas8bit", "s_loadas8bit");
Cmd_AddLegacyCommand("ambient_level", "s_ambientlevel");
Cmd_AddLegacyCommand("ambient_fade", "s_ambientfade");
Cmd_AddLegacyCommand("snd_noextraupdate", "s_noextraupdate");
Cmd_AddLegacyCommand("snd_show", "s_show");
Cmd_AddLegacyCommand("_snd_mixahead", "s_mixahead");
Cmd_AddLegacyCommand("snd_restart", "s_restart"); // and snd_restart a legacy command

Cmd_AddCommand("s_restart", S_Restart_f); // dimman: made s_restart the actual command
Cmd_AddCommand("mutesound", S_MuteSound_f);
Cmd_AddCommand("play", S_Play_f);
Cmd_AddCommand("playvol", S_PlayVol_f);
Cmd_AddCommand("stopsound", S_StopAllSounds_f);
Cmd_AddCommand("soundlist", S_SoundList_f);
Cmd_AddCommand("soundinfo", S_SoundInfo_f);
}

static void S_Register_LatchCvars(void)
{
Cvar_SetCurrentGroup(CVAR_GROUP_SOUND);

Cvar_Register(&s_linearresample);

#if defined(__linux__) || defined(__FreeBSD__)
Cvar_Register(&s_uselegacydrivers);
Cvar_Register(&s_stereo);
Cvar_Register(&s_bits);
Cvar_Register(&s_oss_device);
Cvar_Register(&s_driver);
Cvar_Register(&s_alsa_device);
Cvar_Register(&s_alsa_latency);
Cvar_Register(&s_alsa_noworkaround);
#ifdef WITH_PULSEAUDIO
Cvar_Register(&s_pulseaudio_latency);
#endif
#endif

Cvar_ResetCurrentGroup();
}

void S_Init (void)
{
Com_DPrintf("\n[sound] Initialization\n");
if (snd_initialized) { //whoops
Com_Printf_State (PRINT_INFO, "[sound] Sound is already initialized!\n");
return;
}
if (COM_CheckParm("-nosound")) {
Cmd_AddLegacyCommand ("play", ""); // just suppress warnings
return;
}
if (host_memsize < 0x800000) {
Cvar_Set (&s_loadas8bit, "1");
Com_Printf ("[sound] Not enough memory. Loading all sounds as 8bit\n");
}

S_Register_RegularCvarsAndCommands();
S_Register_LatchCvars();
SND_InitScaletable ();

known_sfx = (sfx_t *) Hunk_AllocName (MAX_SFX * sizeof(sfx_t), "sfx_t");
num_sfx = 0;

snd_initialized = true;

S_Startup();
}

// =======================================================================
// Load a sound
// =======================================================================

static sfx_t *S_FindName (char *name)
{
int i;
sfx_t *sfx;

if (!snd_initialized || !snd_started)
return NULL;

if (!name)
Sys_Error ("S_FindName: NULL");

if (strlen(name) >= MAX_QPATH) {
Com_Printf ("S_FindName: sound name too long (%s)\n", name);
return NULL;
}

// see if already loaded
for (i = 0; i < num_sfx; i++) {
if (!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];
strlcpy (sfx->name, name, sizeof (sfx->name));

num_sfx++;

return sfx;
}

sfx_t *S_PrecacheSound (char *name)
{
sfx_t *sfx;
if (!snd_initialized || !snd_started || s_nosound.value)
return NULL;

if (name == NULL || name[0] == 0)
return NULL;

sfx = S_FindName (name);
if (sfx == NULL)
return NULL;

// cache it in
if (s_precache.value)
S_LoadSound (sfx);

return sfx;
}

//=============================================================================

// picks a channel based on priorities, empty slots, number of channels
static channel_t *SND_PickChannel (int entnum, int entchannel)
{
int ch_idx, first_to_die, 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) ) {
// always 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.playernum+1 && entnum != cl.playernum+1 && 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];
}

// spatializes a channel
static void SND_Spatialize (channel_t *ch)
{
vec_t dot, dist, lscale, rscale, scale;
vec3_t source_vec;
sfx_t *snd;

// anything coming from the view entity will always be full volume
if ((ch->entnum == cl.playernum + 1) || (ch->entnum == SELF_SOUND)) {
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->format.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 ch_idx, skip;

if (!shm || !sfx || s_nosound.value)
return;

// 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 = (int) (fvol * 255);
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 + (int) sc->total_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->format.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)
{
unsigned 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 (qbool clear)
{
int i;

if (!shm)
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;
}

memset(channels, 0, MAX_CHANNELS * sizeof(channel_t));

if (clear)
S_ClearBuffer ();
}

static void S_StopAllSounds_f (void)
{
S_StopAllSounds (true);
}


#ifdef _WIN32
extern char *DSoundError (int error);
#endif

void S_ClearBuffer (void)
{
int clear;

#ifdef _WIN32
if (!shm || (!shm->buffer && !pDSBuf))
#else
if (!shm || !shm->buffer)
#endif
return;

clear = (shm->format.width == 2) ? 0x80 : 0;

#ifdef _WIN32
if (pDSBuf) {
DWORD dwSize;
DWORD *pData;
int reps;
HRESULT hresult;

reps = 0;

while ((hresult = pDSBuf->lpVtbl->Lock(pDSBuf, 0, gSndBufSize, (void **) &pData, &dwSize, NULL, NULL, 0)) != DS_OK) {
if (hresult != DSERR_BUFFERLOST) {
Com_Printf ("S_ClearBuffer: Lock failed with error '%s'\n", DSoundError(hresult));
S_Shutdown ();
return;
} else {
pDSBuf->lpVtbl->Restore (pDSBuf);
}

if (++reps > 2)
return;
}

memset(pData, clear, shm->bufferlength);

pDSBuf->lpVtbl->Unlock(pDSBuf, pData, dwSize, NULL, 0);

} else
#endif
{
memset(shm->buffer, clear, shm->bufferlength);
}
}

void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation)
{
channel_t *ss;
sfxcache_t *sc;

if (!shm || !sfx || s_nosound.value)
return;

if (total_channels == MAX_CHANNELS) {
Com_Printf ("total_channels == MAX_CHANNELS\n");
return;
}

ss = &channels[total_channels];
total_channels++;

sc = S_LoadSound (sfx);
if (!sc)
return;

if (sc->loopstart == -1) {
Com_Printf ("Sound %s not looped\n", sfx->name);
return;
}

ss->sfx = sfx;
VectorCopy (origin, ss->origin);
ss->master_vol = (int) vol;
ss->dist_mult = (attenuation/64) / sound_nominal_clip_dist;
ss->end = paintedtime + (int) sc->total_length;

SND_Spatialize (ss);
}

//=============================================================================

static void S_UpdateAmbientSounds (void)
{
struct cleaf_s *leaf;
int vol;
int ambient_channel;
channel_t *chan;

if (cls.state != ca_active)
return;

leaf = CM_PointInLeaf (listener_origin);
if (!CM_Leafnum(leaf) || !s_ambientlevel.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 = (int) (s_ambientlevel.value * CM_LeafAmbientLevel(leaf, ambient_channel));
if (vol < 8)
vol = 0;

// don't adjust volume too fast
if (chan->master_vol < vol) {
chan->master_vol += Q_rint (cls.frametime * s_ambientfade.value);
if (chan->master_vol > vol)
chan->master_vol = vol;
} else if (chan->master_vol > vol) {
chan->master_vol -= Q_rint (cls.frametime * s_ambientfade.value);
if (chan->master_vol < vol)
chan->master_vol = vol;
}

chan->leftvol = chan->rightvol = chan->master_vol;
}
}

//Called once each time through the main loop
void S_Update (vec3_t origin, vec3_t forward, vec3_t right, vec3_t up)
{
unsigned int i, j, total;
static unsigned int printed_total = 0;
channel_t *ch, *combine;

if (!snd_initialized || !snd_started || (snd_blocked > 0) || !shm)
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;
}
}
}

sound_spatialized = true;

// debugging output
if (s_show.value) {
total = 0;
ch = channels;

for (i = 0; i < total_channels; i++, ch++)
if (ch->sfx && (ch->leftvol || ch->rightvol)) {
#if defined(DEBUG) || defined(_DEBUG)
if (s_show.value == 2)
Com_Printf ("%3i %3i %s\n", ch->leftvol, ch->rightvol, ch->sfx->name); // s_show 2
#endif
total++;
}

Print_flags[Print_current] |= PR_TR_SKIP;

if (total != printed_total) { // This if statement is needed so we don't get spammed by the message
Com_Printf ("%i sound(s) playing\n", total); // s_show 1
printed_total = total;
}
}

// mix some sound
S_Update_();
}

static void GetSoundtime (void)
{
int samplepos, fullsamples;
static int buffers, oldsamplepos;

//joe: capturing audio
#ifdef _WIN32
if (Movie_GetSoundtime())
return;
#endif

#if defined(__linux__) || defined(__FreeBSD__)
fullsamples = shm->samples / shm->format.channels;
// it is possible to miscount buffers if it has wrapped twice between calls to S_Update. Oh well.

samplepos = qsoundhandler->GetDMAPos();
#else
fullsamples = shm->sampleframes;
samplepos = SNDDMA_GetDMAPos();
#endif

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->format.channels;
}

void S_ExtraUpdate (void)
{

//joe: capturing audio
#ifdef _WIN32
if (Movie_IsCapturing() && movie_is_avi)
return;
#endif

#ifdef _WIN32
IN_Accumulate ();
#endif

if (s_noextraupdate.value || !sound_spatialized)
return; // don't pollute timings

S_Update_();
}

static void S_Update_ (void)
{
unsigned int endtime;
#ifdef _WIN32
DWORD dwStatus;
#endif

if (!shm || (snd_blocked > 0))
return;

// Updates DMA time
GetSoundtime();

// check to make sure that we haven't overshot
if (paintedtime < soundtime) {
//Com_Printf ("S_Update_ : overflow\n");
paintedtime = soundtime;
}


#if defined(__linux__) || defined(__FreeBSD__)
int avail;
int samps;

//mix ahead of current position
if(qsoundhandler->GetAvail) {
avail = qsoundhandler->GetAvail();
if(avail <= 0)
return;
endtime = soundtime + avail;
}
else {
endtime = soundtime + (unsigned int) (s_mixahead.value * shm->format.speed);
endtime = min(endtime, (unsigned int)(soundtime + shm->samples * shm->format.channels));
}
samps = (shm->samples) >> (shm->format.channels - 1);
if(endtime - soundtime > samps)
endtime = soundtime + samps;

#else
// mix ahead of current position
endtime = soundtime + (unsigned int) (s_mixahead.value * shm->format.speed);
endtime = min(endtime, (unsigned int)(soundtime + shm->sampleframes));
#endif


#ifdef _WIN32
// if the buffer was lost or stopped, restore it and/or restart it
if (pDSBuf) {
if (pDSBuf->lpVtbl->GetStatus (pDSBuf, &dwStatus) != DS_OK)
Com_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);

#if defined(__linux__) || defined(__FreeBSD__)
if(qsoundhandler->Submit)
qsoundhandler->Submit(paintedtime - soundtime);
#else
SNDDMA_Submit ();
#endif

}

/*
===============================================================================
console functions
===============================================================================
*/

static void S_Play_f (void)
{
int i;
char name[256];
sfx_t *sfx;

if (!snd_initialized || !snd_started || s_nosound.value)
return;

for (i = 1; i < Cmd_Argc(); i++) {
strlcpy (name, Cmd_Argv(i), sizeof (name));
COM_DefaultExtension (name, ".wav");
sfx = S_PrecacheSound(name);
S_StartSound(SELF_SOUND, 0, sfx, listener_origin, 1.0, 0.0);
}
}

static void S_PlayVol_f (void)
{
int i;
float vol;
char name[256];
sfx_t *sfx;

if (!snd_initialized || !snd_started || s_nosound.value)
return;

for (i = 1; i < Cmd_Argc(); i += 2) {
strlcpy (name, Cmd_Argv(i), sizeof (name));
COM_DefaultExtension (name, ".wav");
sfx = S_PrecacheSound(name);
vol = Q_atof(Cmd_Argv(i + 1));
// ezhfan:
// pnum+1 changed to SELF_SOUND to make sound not to disappear
S_StartSound(SELF_SOUND, 0, sfx, listener_origin, vol, 0.0);
}
}

static void S_MuteSound_f(void)
{
static float old_volume;
static int is_muted;

if (is_muted == 0) {
old_volume = s_volume.value;
Cvar_SetValue(&s_volume, 0);
Com_Printf("%s\n", CharsToBrownStatic("Mute"));
is_muted = 1;
}
else if (is_muted == 1) {
Cvar_SetValue(&s_volume, old_volume);
Com_Printf("%s %.2f\n", CharsToBrownStatic("Volume is now"), s_volume.value);
is_muted = 0;
}
}

static void S_SoundList_f (void)
{
int i, total = 0;
unsigned int size;
sfx_t *sfx;
sfxcache_t *sc;

for (sfx = known_sfx, i = 0; i < num_sfx; i++, sfx++) {
sc = (sfxcache_t *) Cache_Check (&sfx->cache);
if (!sc)
continue;
size = sc->total_length * sc->format.width * (sc->format.channels);
total += size;
if (sc->loopstart >= 0)
Com_Printf ("L");
else
Com_Printf (" ");
Com_Printf ("(%2db) %6i : %s\n",sc->format.width*8, size, sfx->name);
}
Com_Printf ("Total resident: %i\n", total);
}

void S_LocalSound (char *sound)
{
sfx_t *sfx;

if (!snd_initialized || !snd_started || s_nosound.value)
return;

if (!(sfx = S_PrecacheSound (sound))) {
Com_Printf ("S_LocalSound: can't cache %s\n", sound);
return;
}

S_StartSound (cl.playernum+1, -1, sfx, vec3_origin, 1, 0);
}

void S_LocalSoundWithVol(char *sound, float volume)
{
sfx_t *sfx;

clamp(volume, 0, 1.0);

if (!snd_initialized || !snd_started || s_nosound.value)
return;

if (!(sfx = S_PrecacheSound (sound))) {
Com_Printf ("S_LocalSound: can't cache %s\n", sound);
return;
}

S_StartSound (cl.playernum+1, -1, sfx, vec3_origin, volume, 1);
}

#ifdef FTE_PEXT2_VOICECHAT

// FTEQW type and naming compatibility
// it's not really necessary, simple find & replace would do the job too
#ifdef _MSC_VER
#define VARGS __cdecl
#endif
#ifndef VARGS
#define VARGS
#endif

#define qboolean qbool
#define qbyte byte

#define ival integer // for cvars compatibility
#define realtime cls.realtime

//=========================================================================

#include <speex/speex.h>
#include <speex/speex_preprocess.h>

static struct
{
qboolean inited;
qboolean loaded;
dllhandle_t *speexlib;
dllhandle_t *speexdsplib;

SpeexBits encbits;
void *encoder;
SpeexPreprocessState *preproc;
unsigned int framesize;
unsigned int samplerate;

SpeexBits decbits[MAX_CLIENTS];
void *decoder[MAX_CLIENTS];
unsigned char decseq[MAX_CLIENTS]; /*sender's sequence, to detect+cover minor packetloss*/
unsigned char decgen[MAX_CLIENTS]; /*last generation. if it changes, we flush speex to reset packet loss*/
float decamp[MAX_CLIENTS]; /*amplify them by this*/
float lastspoke[MAX_CLIENTS]; /*time when they're no longer considered talking. if future, they're talking*/

unsigned char capturebuf[32768]; /*pending data*/
unsigned int capturepos;/*amount of pending data*/
unsigned int encsequence;/*the outgoing sequence count*/
unsigned int generation;/*incremented whenever capture is restarted*/
qboolean wantsend; /*set if we're capturing data to send*/
float voiplevel; /*your own voice level*/
unsigned int dumps; /*trigger a new generation thing after a bit*/
unsigned int keeps; /*for vad_delay*/

snd_capture_driver_t *driver;/*capture driver's functions*/
void *driverctx; /*capture driver context*/
} s_speex;

static const SpeexMode *(VARGS *qspeex_lib_get_mode)(int mode);
static void (VARGS *qspeex_bits_init)(SpeexBits *bits);
static void (VARGS *qspeex_bits_reset)(SpeexBits *bits);
static int (VARGS *qspeex_bits_write)(SpeexBits *bits, char *bytes, int max_len);

static SpeexPreprocessState *(VARGS *qspeex_preprocess_state_init)(int frame_size, int sampling_rate);
static int (VARGS *qspeex_preprocess_ctl)(SpeexPreprocessState *st, int request, void *ptr);
static int (VARGS *qspeex_preprocess_run)(SpeexPreprocessState *st, spx_int16_t *x);

static void * (VARGS *qspeex_encoder_init)(const SpeexMode *mode);
static int (VARGS *qspeex_encoder_ctl)(void *state, int request, void *ptr);
static int (VARGS *qspeex_encode_int)(void *state, spx_int16_t *in, SpeexBits *bits);

static void *(VARGS *qspeex_decoder_init)(const SpeexMode *mode);
static int (VARGS *qspeex_decode_int)(void *state, SpeexBits *bits, spx_int16_t *out);
static void (VARGS *qspeex_bits_read_from)(SpeexBits *bits, char *bytes, int len);

static dllfunction_t qspeexfuncs[] =
{
{(void*)&qspeex_lib_get_mode, "speex_lib_get_mode"},
{(void*)&qspeex_bits_init, "speex_bits_init"},
{(void*)&qspeex_bits_reset, "speex_bits_reset"},
{(void*)&qspeex_bits_write, "speex_bits_write"},

{(void*)&qspeex_encoder_init, "speex_encoder_init"},
{(void*)&qspeex_encoder_ctl, "speex_encoder_ctl"},
{(void*)&qspeex_encode_int, "speex_encode_int"},

{(void*)&qspeex_decoder_init, "speex_decoder_init"},
{(void*)&qspeex_decode_int, "speex_decode_int"},
{(void*)&qspeex_bits_read_from, "speex_bits_read_from"},

{NULL}
};

static dllfunction_t qspeexdspfuncs[] =
{
{(void*)&qspeex_preprocess_state_init, "speex_preprocess_state_init"},
{(void*)&qspeex_preprocess_ctl, "speex_preprocess_ctl"},
{(void*)&qspeex_preprocess_run, "speex_preprocess_run"},

{NULL}
};

extern snd_capture_driver_t DSOUND_Capture;

static qboolean S_Speex_Init(void)
{
int i;
const SpeexMode *mode;
if (s_speex.inited)
return s_speex.loaded;
s_speex.inited = true;

s_speex.speexlib = Sys_LoadLibrary("libspeex", qspeexfuncs);
if (!s_speex.speexlib)
{
Con_Printf("libspeex not found. Voice chat not available.\n");
return false;
}

s_speex.speexdsplib = Sys_LoadLibrary("libspeexdsp", qspeexdspfuncs);
if (!s_speex.speexdsplib)
{
Con_Printf("libspeexdsp not found. Voice chat not available.\n");
return false;
}

mode = qspeex_lib_get_mode(SPEEX_MODEID_NB);


qspeex_bits_init(&s_speex.encbits);
qspeex_bits_reset(&s_speex.encbits);

s_speex.encoder = qspeex_encoder_init(mode);

qspeex_encoder_ctl(s_speex.encoder, SPEEX_GET_FRAME_SIZE, &s_speex.framesize);
qspeex_encoder_ctl(s_speex.encoder, SPEEX_GET_SAMPLING_RATE, &s_speex.samplerate);
s_speex.samplerate = 11025;
qspeex_encoder_ctl(s_speex.encoder, SPEEX_SET_SAMPLING_RATE, &s_speex.samplerate);

s_speex.preproc = qspeex_preprocess_state_init(s_speex.framesize, s_speex.samplerate);

i = 1;
qspeex_preprocess_ctl(s_speex.preproc, SPEEX_PREPROCESS_SET_DENOISE, &i);

i = 1;
qspeex_preprocess_ctl(s_speex.preproc, SPEEX_PREPROCESS_SET_AGC, &i);

for (i = 0; i < MAX_CLIENTS; i++)
{
qspeex_bits_init(&s_speex.decbits[i]);
qspeex_bits_reset(&s_speex.decbits[i]);
s_speex.decoder[i] = qspeex_decoder_init(mode);
s_speex.decamp[i] = 1;
}
s_speex.loaded = true;
return s_speex.loaded;
}

void S_Voip_Parse(void)
{
unsigned int sender;
int bytes;
unsigned char data[1024], *start;
short decodebuf[1024];
unsigned int decodesamps, len, newseq, drops;
unsigned char seq, gen;
float amp = 1;
unsigned int i;

sender = MSG_ReadByte();
gen = MSG_ReadByte();
seq = MSG_ReadByte();
bytes = MSG_ReadShort();

// Com_DPrintf("data in: %d\n", bytes);

if (bytes > sizeof(data) || !cl_voip_play.ival || !S_Speex_Init() || (gen & 0xf0))
{
Com_DPrintf("skip data: %d\n", bytes);
MSG_ReadSkip(bytes);
return;
}
MSG_ReadData(data, bytes);

sender &= MAX_CLIENTS-1;

amp = s_speex.decamp[sender];

decodesamps = 0;
newseq = 0;
drops = 0;
start = data;

s_speex.lastspoke[sender] = realtime + 0.5;
if (s_speex.decgen[sender] != gen)
{
qspeex_bits_reset(&s_speex.decbits[sender]);
s_speex.decgen[sender] = gen;
s_speex.decseq[sender] = seq;
}

while (bytes > 0)
{
if (decodesamps + s_speex.framesize > sizeof(decodebuf)/sizeof(decodebuf[0]))
{
S_RawAudio(sender, (qbyte*)decodebuf, s_speex.samplerate, decodesamps, 1, 2);
decodesamps = 0;
}

if (s_speex.decseq[sender] != seq)
{
qspeex_decode_int(s_speex.decoder[sender], NULL, decodebuf + decodesamps);
s_speex.decseq[sender]++;
drops++;
}
else
{
bytes--;
len = *start++;
qspeex_bits_read_from(&s_speex.decbits[sender], (char *) start, len);
bytes -= len;
start += len;
qspeex_decode_int(s_speex.decoder[sender], &s_speex.decbits[sender], decodebuf + decodesamps);
newseq++;
}
if (amp != 1)
{
for (i = decodesamps; i < decodesamps+s_speex.framesize; i++)
decodebuf[i] *= amp;
}
decodesamps += s_speex.framesize;
}
s_speex.decseq[sender] += newseq;

if (drops)
Con_DPrintf("%i dropped audio frames\n", drops);

if (decodesamps > 0)
S_RawAudio(sender, (qbyte*)decodebuf, s_speex.samplerate, decodesamps, 1, 2);
}

void S_Voip_Transmit(unsigned char clc, sizebuf_t *buf)
{
unsigned char outbuf[1024];
unsigned int outpos;//in bytes
unsigned int encpos;//in bytes
short *start;
unsigned char initseq;//in frames
unsigned int i;
unsigned int samps;
float level, f;
float micamp = cl_voip_micamp.value;
qboolean voipsendenable = true;

/*if you're sending sound, you should be prepared to accept others yelling at you to shut up*/
if (!cl_voip_play.ival)
voipsendenable = false;
if (!(cls.fteprotocolextensions2 & FTE_PEXT2_VOICECHAT))
voipsendenable = false;

if (!voipsendenable)
{
if (s_speex.driver)
{
if (s_speex.wantsend)
s_speex.driver->Stop(s_speex.driverctx);
s_speex.driver->Shutdown(s_speex.driverctx);
s_speex.driverctx = NULL;
s_speex.driver = NULL;
}
return;
}

voipsendenable = cl_voip_send.ival>0;

if (!s_speex.driver)
{
s_speex.voiplevel = -1;
/*only init the first time capturing is requested*/
if (!voipsendenable)
return;

/*Add new drivers in order of priority*/
if (!s_speex.driver)
s_speex.driver = &DSOUND_Capture;

/*no way to capture audio, give up*/
if (!s_speex.driver)
return;

/*see if we can init speex...*/
if (!S_Speex_Init())
return;

s_speex.driverctx = s_speex.driver->Init(s_speex.samplerate);
}

/*couldn't init a driver?*/
if (!s_speex.driverctx)
{
return;
}

if (!voipsendenable && s_speex.wantsend)
{
s_speex.wantsend = false;
s_speex.capturepos += s_speex.driver->Update(s_speex.driverctx, (unsigned char*)s_speex.capturebuf + s_speex.capturepos, 1, sizeof(s_speex.capturebuf) - s_speex.capturepos);
s_speex.driver->Stop(s_speex.driverctx);
/*note: we still grab audio to flush everything that was captured while it was active*/
}
else if (voipsendenable && !s_speex.wantsend)
{
s_speex.wantsend = true;
if (!s_speex.capturepos)
{ /*if we were actually still sending, it was probably only off for a single frame, in which case don't reset it*/
s_speex.dumps = 0;
s_speex.generation++;
s_speex.encsequence = 0;
qspeex_bits_reset(&s_speex.encbits);
}
else
{
s_speex.capturepos += s_speex.driver->Update(s_speex.driverctx, (unsigned char*)s_speex.capturebuf + s_speex.capturepos, 1, sizeof(s_speex.capturebuf) - s_speex.capturepos);
}
s_speex.driver->Start(s_speex.driverctx);

voicevolumemod = cl_voip_capturingvol.value;
}

s_speex.capturepos += s_speex.driver->Update(s_speex.driverctx, (unsigned char*)s_speex.capturebuf + s_speex.capturepos, s_speex.framesize*2, sizeof(s_speex.capturebuf) - s_speex.capturepos);

if (!s_speex.wantsend && s_speex.capturepos < s_speex.framesize*2)
{
s_speex.voiplevel = -1;
s_speex.capturepos = 0;
voicevolumemod = 1;
return;
}

initseq = s_speex.encsequence;
level = 0;
samps=0;
for (encpos = 0, outpos = 0; s_speex.capturepos-encpos >= s_speex.framesize*2 && sizeof(outbuf)-outpos > 64; s_speex.encsequence++)
{
start = (short*)(s_speex.capturebuf + encpos);

qspeex_preprocess_run(s_speex.preproc, start);

for (i = 0; i < s_speex.framesize; i++)
{
f = start[i] * micamp;
start[i] = f;
f = fabs(start[i]);
level += f*f;
}
samps+=s_speex.framesize;

qspeex_bits_reset(&s_speex.encbits);
qspeex_encode_int(s_speex.encoder, start, &s_speex.encbits);
outbuf[outpos] = qspeex_bits_write(&s_speex.encbits, (char *) outbuf+outpos+1, sizeof(outbuf) - (outpos+1));
outpos += 1+outbuf[outpos];
encpos += s_speex.framesize*2;
}
if (samps)
{
float nl;
nl = (3000*level) / (32767.0f*32767*samps);
s_speex.voiplevel = (s_speex.voiplevel*7 + nl)/8;
if (s_speex.voiplevel < cl_voip_vad_threshhold.ival && !(cl_voip_send.ival & 2))
{
/*try and dump it, it was too quiet, and they're not pressing +voip*/
if (s_speex.keeps > samps)
{
/*but not instantly*/
s_speex.keeps -= samps;
}
else
{
outpos = 0;
s_speex.dumps += samps;
s_speex.keeps = 0;
}
}
else
s_speex.keeps = s_speex.samplerate * cl_voip_vad_delay.value;
if (outpos)
{
if (s_speex.dumps > s_speex.samplerate/4)
s_speex.generation++;
s_speex.dumps = 0;
}
}

if (outpos && buf->maxsize - buf->cursize >= outpos+4)
{
MSG_WriteByte(buf, clc);
MSG_WriteByte(buf, (s_speex.generation & 0x0f)); /*gonna leave that nibble clear here... in this version, the client will ignore packets with those bits set. can use them for codec or something*/
MSG_WriteByte(buf, initseq);
MSG_WriteShort(buf, outpos);
SZ_Write(buf, outbuf, outpos);

// Com_DPrintf("data out: %d\n", outpos);
}

/*remove sent data*/
memmove(s_speex.capturebuf, s_speex.capturebuf + encpos, s_speex.capturepos-encpos);
s_speex.capturepos -= encpos;
}

void S_Voip_Ignore(unsigned int slot, qboolean ignore)
{
CL_SendClientCommand(true, "vignore %i %i", slot, ignore);
}

static void S_Voip_Enable_f(void)
{
Cvar_SetValue(&cl_voip_send, cl_voip_send.ival | 2);
}

static void S_Voip_Disable_f(void)
{
Cvar_SetValue(&cl_voip_send, cl_voip_send.ival & ~2);
}

static void S_Voip_f(void)
{
int i;
if (!strcmp(Cmd_Argv(1), "maxgain"))
{
i = atoi(Cmd_Argv(2));
qspeex_preprocess_ctl(s_speex.preproc, SPEEX_PREPROCESS_SET_AGC_MAX_GAIN, &i);
}
}

static void S_Voip_Play_Callback(cvar_t *var, char *string, qbool *cancel)
{
if (cls.fteprotocolextensions2 & FTE_PEXT2_VOICECHAT)
{
if (var->ival)
CL_SendClientCommand(true, "unmuteall");
else
CL_SendClientCommand(true, "muteall");
}
}

void S_Voip_MapChange(void)
{
Cvar_ForceCallback(&cl_voip_play);
}

int S_Voip_Loudness(qboolean ignorevad)
{
if (s_speex.voiplevel > 100)
return 100;
if (!s_speex.driverctx || (!ignorevad && s_speex.dumps))
return -1;
return s_speex.voiplevel;
}

qboolean S_Voip_Speaking(unsigned int plno)
{
if (plno >= MAX_CLIENTS)
return false;
return s_speex.lastspoke[plno] > realtime;
}

#endif

//===================================================================
// Streaming audio.
// This is useful when there is one source, and the sound is to be played with no attenuation.
//===================================================================

#define MAX_RAW_CACHE (1024 * 32) // have no idea which size it actually should be.

typedef struct
{
qbool inuse;
int id;
sfx_t sfx;
} streaming_t;

static void S_RawClearStream(streaming_t *s);

#define MAX_RAW_SOURCES (MAX_CLIENTS+1)

streaming_t s_streamers[MAX_RAW_SOURCES] = {{0}};

void S_RawClear(void)
{
int i;
streaming_t *s;

for (s = s_streamers, i = 0; i < MAX_RAW_SOURCES; i++, s++)
{
S_RawClearStream(s);
}

memset(s_streamers, 0, sizeof(s_streamers));
}

// Stop playing particular stream and make it free.
static void S_RawClearStream(streaming_t *s)
{
int i;
sfxcache_t * currentcache;

if (!s)
return;

// get current cache if any.
currentcache = (sfxcache_t *)Cache_Check(&s->sfx.cache);
if (currentcache)
{
currentcache->loopstart = -1; //stop mixing it
}

// remove link on sfx from the channels array.
for (i = 0; i < total_channels; i++)
{
if (channels[i].sfx == &s->sfx)
{
channels[i].sfx = NULL;
break;
}
}

// free cache.
if (s->sfx.cache.data)
Cache_Free(&s->sfx.cache);

// clear whole struct.
memset(s, 0, sizeof(*s));
}

// Searching for free slot or re-use previous one with the same sourceid.
static streaming_t * S_RawGetFreeStream(int sourceid)
{
int i;
streaming_t *s, *free = NULL;

for (s = s_streamers, i = 0; i < MAX_RAW_SOURCES; i++, s++)
{
if (!s->inuse)
{
if (!free)
{
free = s; // found free stream slot.
}

continue;
}

if (s->id == sourceid)
{
return s; // re-using slot.
}
}

return free;
}

// Streaming audio.
// This is useful when there is one source, and the sound is to be played with no attenuation.
void S_RawAudio(int sourceid, byte *data,
unsigned int speed, unsigned int samples, unsigned int channelsnum, unsigned int width)
{
unsigned int i;
int newsize;
int prepadl;
int spare;
int outsamples;
double speedfactor;
sfxcache_t * currentcache;
streaming_t * s;

// search for free slot or re-use previous one with the same sourceid.
s = S_RawGetFreeStream(sourceid);

if (!s)
{
Com_DPrintf("No free audio streams or stream not found\n");
return;
}

// empty data mean someone tell us to shut up particular slot.
if (!data)
{
S_RawClearStream(s);
return;
}

// attempting to add new stream
if (!s->inuse)
{
sfxcache_t * newcache;

// clear whole struct.
memset(s, 0, sizeof(*s));
// allocate cache.
newsize = MAX_RAW_CACHE; //sizeof(sfxcache_t)

if (newsize < sizeof(sfxcache_t))
Sys_Error("MAX_RAW_CACHE too small %d", newsize);

newcache = Cache_Alloc(&s->sfx.cache, newsize, "rawaudio");
if (!newcache)
{
Com_DPrintf("Cache_Alloc failed\n");
return;
}

s->inuse = true;
s->id = sourceid;
// strcpy(s->sfx.name, ""); // FIXME: probably we should put some specific tag name here?
s->sfx.cache.data = newcache;
newcache->format.speed = shm->format.speed;
newcache->format.channels = channelsnum;
newcache->format.width = width;
newcache->loopstart = -1;
newcache->total_length = 0;
newcache = NULL;

// Com_Printf("Added new raw stream\n");
}

// get current cache if any.
currentcache = (sfxcache_t *)Cache_Check(&s->sfx.cache);
if (!currentcache)
{
Com_DPrintf("Cache_Check failed\n");
S_RawClearStream(s);
return;
}

if ( currentcache->format.speed != shm->format.speed
|| currentcache->format.channels != channelsnum
|| currentcache->format.width != width)
{
currentcache->format.speed = shm->format.speed;
currentcache->format.channels = channelsnum;
currentcache->format.width = width;
// newcache->loopstart = -1;
currentcache->total_length = 0;
// Com_Printf("Restarting raw stream\n");
}

speedfactor = (double)speed/shm->format.speed;
outsamples = samples/speedfactor;

prepadl = 0x7fffffff;
// FIXME: qqshka: I have no idea that spike is doing here, really. WTF is prepadl??? PITCHSHIFT ???
// spike: make sure that we have a prepad.
for (i = 0; i < total_channels; i++)
{
if (channels[i].sfx == &s->sfx)
{
if (prepadl > (channels[i].pos/*>>PITCHSHIFT*/))
prepadl = (channels[i].pos/*>>PITCHSHIFT*/);
break;
}
}

if (prepadl == 0x7fffffff)
{
if (s_show.integer)
Com_Printf("Wasn't playing\n");
prepadl = 0;
spare = 0;
if (spare > shm->format.speed)
{
Com_DPrintf("Sacrificed raw sound stream\n");
spare = 0; //too far out. sacrifice it all
}
}
else
{
if (prepadl < 0)
prepadl = 0;
spare = currentcache->total_length - prepadl;
if (spare < 0) //remaining samples since last time
spare = 0;

if (spare > shm->format.speed * 2) // more than 2 seconds of sound
{
Com_DPrintf("Sacrificed raw sound stream\n");
spare = 0; //too far out. sacrifice it all
}
}

newsize = sizeof(sfxcache_t) + (spare + outsamples) * currentcache->format.channels * currentcache->format.width;
if (newsize >= MAX_RAW_CACHE)
{
Com_DPrintf("Cache buffer overflowed\n");
S_RawClearStream(s);
return;
}
// move along spare/remaning samples in the begging of the buffer.
memmove(currentcache->data,
currentcache->data + prepadl * currentcache->format.channels * currentcache->format.width,
spare * currentcache->format.channels * currentcache->format.width);

currentcache->total_length = spare + outsamples;

// resample.
{
extern cvar_t s_linearresample_stream;
short *outpos = (short *)(currentcache->data + spare * currentcache->format.channels * currentcache->format.width);
SND_ResampleStream(data,
speed,
width,
channelsnum,
samples,
outpos,
shm->format.speed,
currentcache->format.width,
currentcache->format.channels,
s_linearresample_stream.integer
);
}

currentcache->loopstart = -1;//currentcache->total_length;

for (i = 0; i < total_channels; i++)
{
if (channels[i].sfx == &s->sfx)
{
#if 0
// FIXME: qqshka: hrm, should it be just like this all the time??? I think it should.
channels[i].pos = 0;
channels[i].end = paintedtime + currentcache->total_length;
#else
channels[i].pos -= prepadl; // * channels[i].rate;
channels[i].end += outsamples;
channels[i].master_vol = (int) (s_raw_volume.value * 255); // this should changed volume on alredy playing sound.

if (channels[i].end < paintedtime)
{
channels[i].pos = 0;
channels[i].end = paintedtime + currentcache->total_length;
}
#endif
break;
}
}

//this one wasn't playing, lets start it then.
if (i == total_channels)
{
// Com_DPrintf("start sound\n");
/*slight delay to try to avoid frame rate/etc stops/starts*/
// S_StartSoundCard(si, -1, 0, &s->sfx, r_origin, 1, 32767, -shm->format.speed*0.02, 0);
S_StartSound(SELF_SOUND, 0, &s->sfx, r_origin, s_raw_volume.value, 0);
}
}
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