Xash3D FWGS engine.
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/*
s_vox.c - npc sentences
Copyright (C) 2010 Uncle Mike
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 3 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.
*/
#include "common.h"
#include "sound.h"
#include "const.h"
sentence_t g_Sentences[MAX_SENTENCES];
static uint g_numSentences;
static char *rgpparseword[CVOXWORDMAX]; // array of pointers to parsed words
static char voxperiod[] = "_period"; // vocal pause
static char voxcomma[] = "_comma"; // vocal pause
static int IsNextWord( const char c )
{
if( c == '.' || c == ',' || c == ' ' || c == '(' )
return 1;
return 0;
}
static int IsSkipSpace( const char c )
{
if( c == ',' || c == '.' || c == ' ' )
return 1;
return 0;
}
static int IsWhiteSpace( const char space )
{
if( space == ' ' || space == '\t' || space == '\r' || space == '\n' )
return 1;
return 0;
}
static int IsCommandChar( const char c )
{
if( c == 'v' || c == 'p' || c == 's' || c == 'e' || c == 't' )
return 1;
return 0;
}
static int IsDelimitChar( const char c )
{
if( c == '(' || c == ')' )
return 1;
return 0;
}
static char *ScanForwardUntil( char *string, const char scan )
{
while( string[0] )
{
if( string[0] == scan )
return string;
string++;
}
return string;
}
// backwards scan psz for last '/'
// return substring in szpath null terminated
// if '/' not found, return 'vox/'
static char *VOX_GetDirectory( char *szpath, char *psz )
{
char c;
int cb = 0;
char *p = psz + Q_strlen( psz ) - 1;
// scan backwards until first '/' or start of string
c = *p;
while( p > psz && c != '/' )
{
c = *( --p );
cb++;
}
if( c != '/' )
{
// didn't find '/', return default directory
Q_strcpy( szpath, "vox/" );
return psz;
}
cb = Q_strlen( psz ) - cb;
memcpy( szpath, psz, cb );
szpath[cb] = 0;
return p + 1;
}
// scan g_Sentences, looking for pszin sentence name
// return pointer to sentence data if found, null if not
// CONSIDER: if we have a large number of sentences, should
// CONSIDER: sort strings in g_Sentences and do binary search.
char *VOX_LookupString( const char *pSentenceName, int *psentencenum )
{
int i;
if( Q_isdigit( pSentenceName ) && (i = Q_atoi( pSentenceName )) < g_numSentences )
{
if( psentencenum ) *psentencenum = i;
return (g_Sentences[i].pName + Q_strlen( g_Sentences[i].pName ) + 1 );
}
for( i = 0; i < g_numSentences; i++ )
{
if( !Q_stricmp( pSentenceName, g_Sentences[i].pName ))
{
if( psentencenum ) *psentencenum = i;
return (g_Sentences[i].pName + Q_strlen( g_Sentences[i].pName ) + 1 );
}
}
return NULL;
}
// parse a null terminated string of text into component words, with
// pointers to each word stored in rgpparseword
// note: this code actually alters the passed in string!
char **VOX_ParseString( char *psz )
{
int i, fdone = 0;
char c, *p = psz;
memset( rgpparseword, 0, sizeof( char* ) * CVOXWORDMAX );
if( !psz ) return NULL;
i = 0;
rgpparseword[i++] = psz;
while( !fdone && i < CVOXWORDMAX )
{
// scan up to next word
c = *p;
while( c && !IsNextWord( c ))
c = *(++p);
// if '(' then scan for matching ')'
if( c == '(' )
{
p = ScanForwardUntil( p, ')' );
c = *(++p);
if( !c ) fdone = 1;
}
if( fdone || !c )
{
fdone = 1;
}
else
{
// if . or , insert pause into rgpparseword,
// unless this is the last character
if(( c == '.' || c == ',' ) && *(p+1) != '\n' && *(p+1) != '\r' && *(p+1) != 0 )
{
if( c == '.' ) rgpparseword[i++] = voxperiod;
else rgpparseword[i++] = voxcomma;
if( i >= CVOXWORDMAX )
break;
}
// null terminate substring
*p++ = 0;
// skip whitespace
c = *p;
while( c && IsSkipSpace( c ))
c = *(++p);
if( !c ) fdone = 1;
else rgpparseword[i++] = p;
}
}
return rgpparseword;
}
float VOX_GetVolumeScale( channel_t *pchan )
{
if( pchan->currentWord )
{
if ( pchan->words[pchan->wordIndex].volume )
{
float volume = pchan->words[pchan->wordIndex].volume * 0.01f;
if( volume < 1.0f ) return volume;
}
}
return 1.0f;
}
void VOX_SetChanVol( channel_t *ch )
{
float scale;
if( !ch->currentWord )
return;
scale = VOX_GetVolumeScale( ch );
if( scale == 1.0f ) return;
ch->rightvol = (int)(ch->rightvol * scale);
ch->leftvol = (int)(ch->leftvol * scale);
}
float VOX_ModifyPitch( channel_t *ch, float pitch )
{
if( ch->currentWord )
{
if( ch->words[ch->wordIndex].pitch > 0 )
{
pitch += ( ch->words[ch->wordIndex].pitch - PITCH_NORM ) * 0.01f;
}
}
return pitch;
}
//===============================================================================
// Get any pitch, volume, start, end params into voxword
// and null out trailing format characters
// Format:
// someword(v100 p110 s10 e20)
//
// v is volume, 0% to n%
// p is pitch shift up 0% to n%
// s is start wave offset %
// e is end wave offset %
// t is timecompression %
//
// pass fFirst == 1 if this is the first string in sentence
// returns 1 if valid string, 0 if parameter block only.
//
// If a ( xxx ) parameter block does not directly follow a word,
// then that 'default' parameter block will be used as the default value
// for all following words. Default parameter values are reset
// by another 'default' parameter block. Default parameter values
// for a single word are overridden for that word if it has a parameter block.
//
//===============================================================================
int VOX_ParseWordParams( char *psz, voxword_t *pvoxword, int fFirst )
{
char *pszsave = psz;
char c, ct, sznum[8];
static voxword_t voxwordDefault;
int i;
// init to defaults if this is the first word in string.
if( fFirst )
{
voxwordDefault.pitch = -1;
voxwordDefault.volume = 100;
voxwordDefault.start = 0;
voxwordDefault.end = 100;
voxwordDefault.fKeepCached = 0;
voxwordDefault.timecompress = 0;
}
*pvoxword = voxwordDefault;
// look at next to last char to see if we have a
// valid format:
c = *( psz + Q_strlen( psz ) - 1 );
// no formatting, return
if( c != ')' ) return 1;
// scan forward to first '('
c = *psz;
while( !IsDelimitChar( c ))
c = *(++psz);
// bogus formatting
if( c == ')' ) return 0;
// null terminate
*psz = 0;
ct = *(++psz);
while( 1 )
{
// scan until we hit a character in the commandSet
while( ct && !IsCommandChar( ct ))
ct = *(++psz);
if( ct == ')' )
break;
memset( sznum, 0, sizeof( sznum ));
i = 0;
c = *(++psz);
if( !isdigit( c ))
break;
// read number
while( isdigit( c ) && i < sizeof( sznum ) - 1 )
{
sznum[i++] = c;
c = *(++psz);
}
// get value of number
i = Q_atoi( sznum );
switch( ct )
{
case 'v': pvoxword->volume = i; break;
case 'p': pvoxword->pitch = i; break;
case 's': pvoxword->start = i; break;
case 'e': pvoxword->end = i; break;
case 't': pvoxword->timecompress = i; break;
}
ct = c;
}
// if the string has zero length, this was an isolated
// parameter block. Set default voxword to these
// values
if( Q_strlen( pszsave ) == 0 )
{
voxwordDefault = *pvoxword;
return 0;
}
return 1;
}
void VOX_LoadWord( channel_t *pchan )
{
if( pchan->words[pchan->wordIndex].sfx )
{
wavdata_t *pSource = S_LoadSound( pchan->words[pchan->wordIndex].sfx );
if( pSource )
{
int start = pchan->words[pchan->wordIndex].start;
int end = pchan->words[pchan->wordIndex].end;
// apply mixer
pchan->currentWord = &pchan->pMixer;
pchan->currentWord->pData = pSource;
// don't allow overlapped ranges
if( end <= start ) end = 0;
if( start || end )
{
int sampleCount = pSource->samples;
if( start )
{
S_SetSampleStart( pchan, pSource, (int)(sampleCount * 0.01f * start));
}
if( end )
{
S_SetSampleEnd( pchan, pSource, (int)(sampleCount * 0.01f * end));
}
}
}
}
}
void VOX_FreeWord( channel_t *pchan )
{
pchan->currentWord = NULL; // sentence is finished
memset( &pchan->pMixer, 0, sizeof( pchan->pMixer ));
// release unused sounds
if( pchan->words[pchan->wordIndex].sfx )
{
// If this wave wasn't precached by the game code
if( !pchan->words[pchan->wordIndex].fKeepCached )
{
FS_FreeSound( pchan->words[pchan->wordIndex].sfx->cache );
pchan->words[pchan->wordIndex].sfx->cache = NULL;
pchan->words[pchan->wordIndex].sfx = NULL;
}
}
}
void VOX_LoadFirstWord( channel_t *pchan, voxword_t *pwords )
{
int i = 0;
// copy each pointer in the sfx temp array into the
// sentence array, and set the channel to point to the
// sentence array
while( pwords[i].sfx != NULL )
{
pchan->words[i] = pwords[i];
i++;
}
pchan->words[i].sfx = NULL;
pchan->wordIndex = 0;
VOX_LoadWord( pchan );
}
// return number of samples mixed
int VOX_MixDataToDevice( channel_t *pchan, int sampleCount, int outputRate, int outputOffset )
{
// save this to compute total output
int startingOffset = outputOffset;
if( !pchan->currentWord )
return 0;
while( sampleCount > 0 && pchan->currentWord )
{
int timeCompress = pchan->words[pchan->wordIndex].timecompress;
int outputCount = S_MixDataToDevice( pchan, sampleCount, outputRate, outputOffset, timeCompress );
outputOffset += outputCount;
sampleCount -= outputCount;
// if we finished load a next word
if( pchan->currentWord->finished )
{
VOX_FreeWord( pchan );
pchan->wordIndex++;
VOX_LoadWord( pchan );
if( pchan->currentWord )
{
pchan->sfx = pchan->words[pchan->wordIndex].sfx;
}
}
}
return outputOffset - startingOffset;
}
// link all sounds in sentence, start playing first word.
void VOX_LoadSound( channel_t *pchan, const char *pszin )
{
char buffer[512];
int i, cword;
char pathbuffer[64];
char szpath[32];
voxword_t rgvoxword[CVOXWORDMAX];
char *psz;
if( !pszin || !*pszin )
return;
memset( rgvoxword, 0, sizeof( voxword_t ) * CVOXWORDMAX );
memset( buffer, 0, sizeof( buffer ));
// lookup actual string in g_Sentences,
// set pointer to string data
psz = VOX_LookupString( pszin, NULL );
if( !psz )
{
Con_DPrintf( S_ERROR "VOX_LoadSound: no such sentence %s\n", pszin );
return;
}
// get directory from string, advance psz
psz = VOX_GetDirectory( szpath, psz );
if( Q_strlen( psz ) > sizeof( buffer ) - 1 )
{
Con_Printf( S_ERROR "VOX_LoadSound: sentence is too long %s\n", psz );
return;
}
// copy into buffer
Q_strcpy( buffer, psz );
psz = buffer;
// parse sentence (also inserts null terminators between words)
VOX_ParseString( psz );
// for each word in the sentence, construct the filename,
// lookup the sfx and save each pointer in a temp array
i = 0;
cword = 0;
while( rgpparseword[i] )
{
// Get any pitch, volume, start, end params into voxword
if( VOX_ParseWordParams( rgpparseword[i], &rgvoxword[cword], i == 0 ))
{
// this is a valid word (as opposed to a parameter block)
Q_strcpy( pathbuffer, szpath );
Q_strncat( pathbuffer, rgpparseword[i], sizeof( pathbuffer ));
Q_strncat( pathbuffer, ".wav", sizeof( pathbuffer ));
// find name, if already in cache, mark voxword
// so we don't discard when word is done playing
rgvoxword[cword].sfx = S_FindName( pathbuffer, &( rgvoxword[cword].fKeepCached ));
cword++;
}
i++;
}
VOX_LoadFirstWord( pchan, rgvoxword );
pchan->isSentence = true;
pchan->sfx = rgvoxword[0].sfx;
}
//-----------------------------------------------------------------------------
// Purpose: Take a NULL terminated sentence, and parse any commands contained in
// {}. The string is rewritten in place with those commands removed.
//
// Input : *pSentenceData - sentence data to be modified in place
// sentenceIndex - global sentence table index for any data that is
// parsed out
//-----------------------------------------------------------------------------
void VOX_ParseLineCommands( char *pSentenceData, int sentenceIndex )
{
char tempBuffer[512];
char *pNext, *pStart;
int length, tempBufferPos = 0;
if( !pSentenceData )
return;
pStart = pSentenceData;
while( *pSentenceData )
{
pNext = ScanForwardUntil( pSentenceData, '{' );
// find length of "good" portion of the string (not a {} command)
length = pNext - pSentenceData;
if( tempBufferPos + length > sizeof( tempBuffer ))
{
Con_Printf( S_ERROR "Sentence exceeded max length of %d\n", sizeof(tempBuffer) - 1 );
return;
}
// Copy good string to temp buffer
memcpy( tempBuffer + tempBufferPos, pSentenceData, length );
// move the copy position
tempBufferPos += length;
pSentenceData = pNext;
// skip ahead of the opening brace
if( *pSentenceData ) pSentenceData++;
// skip whitespace
while( *pSentenceData && *pSentenceData <= 32 )
pSentenceData++;
// simple comparison of string commands:
switch( Q_tolower( *pSentenceData ))
{
case 'l':
// all commands starting with the letter 'l' here
if( !Q_strnicmp( pSentenceData, "len", 3 ))
{
g_Sentences[sentenceIndex].length = Q_atof( pSentenceData + 3 );
}
break;
case 0:
default:
break;
}
pSentenceData = ScanForwardUntil( pSentenceData, '}' );
// skip the closing brace
if( *pSentenceData ) pSentenceData++;
// skip trailing whitespace
while( *pSentenceData && *pSentenceData <= 32 )
pSentenceData++;
}
if( tempBufferPos < sizeof( tempBuffer ))
{
// terminate cleaned up copy
tempBuffer[tempBufferPos] = 0;
// copy it over the original data
Q_strcpy( pStart, tempBuffer );
}
}
// Load sentence file into memory, insert null terminators to
// delimit sentence name/sentence pairs. Keep pointer to each
// sentence name so we can search later.
void VOX_ReadSentenceFile( const char *psentenceFileName )
{
char c, *pch, *pFileData;
char *pchlast, *pSentenceData;
size_t fileSize;
// load file
pFileData = (char *)FS_LoadFile( psentenceFileName, &fileSize, false );
if( !pFileData ) return; // this game just doesn't used vox sound system
pch = pFileData;
pchlast = pch + fileSize;
while( pch < pchlast )
{
if( g_numSentences >= MAX_SENTENCES )
{
Con_Printf( S_ERROR "VOX_Init: too many sentences specified, max is %d\n", MAX_SENTENCES );
break;
}
// only process this pass on sentences
pSentenceData = NULL;
// skip newline, cr, tab, space
c = *pch;
while( pch < pchlast && IsWhiteSpace( c ))
c = *(++pch);
// skip entire line if first char is /
if( *pch != '/' )
{
sentence_t *pSentence = &g_Sentences[g_numSentences++];
pSentence->pName = pch;
pSentence->length = 0;
// scan forward to first space, insert null terminator
// after sentence name
c = *pch;
while( pch < pchlast && c != ' ' )
c = *(++pch);
if( pch < pchlast )
*pch++ = 0;
// a sentence may have some line commands, make an extra pass
pSentenceData = pch;
}
// scan forward to end of sentence or eof
while( pch < pchlast && pch[0] != '\n' && pch[0] != '\r' )
pch++;
// insert null terminator
if( pch < pchlast ) *pch++ = 0;
// If we have some sentence data, parse out any line commands
if( pSentenceData && pSentenceData < pchlast )
{
int index = g_numSentences - 1;
// the current sentence has an index of count-1
VOX_ParseLineCommands( pSentenceData, index );
}
}
}
void VOX_Init( void )
{
memset( g_Sentences, 0, sizeof( g_Sentences ));
g_numSentences = 0;
VOX_ReadSentenceFile( DEFAULT_SOUNDPATH "sentences.txt" );
}
void VOX_Shutdown( void )
{
g_numSentences = 0;
}