mirror of
https://bitbucket.org/CPMADevs/cnq3
synced 2024-11-14 00:11:01 +00:00
312 lines
7.2 KiB
C++
312 lines
7.2 KiB
C++
/*
|
|
===========================================================================
|
|
Copyright (C) 1999-2005 Id Software, Inc.
|
|
|
|
This file is part of Quake III Arena source code.
|
|
|
|
Quake III Arena source code 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.
|
|
|
|
Quake III Arena source code 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 Quake III Arena source code; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
===========================================================================
|
|
*/
|
|
// snd_mix.c -- portable code to mix sounds for snd_dma.c
|
|
|
|
#include "client.h"
|
|
#include "snd_local.h"
|
|
|
|
static portable_samplepair_t paintbuffer[PAINTBUFFER_SIZE];
|
|
static int snd_vol;
|
|
|
|
static int* snd_p;
|
|
static int snd_linear_count;
|
|
static short* snd_out;
|
|
|
|
|
|
static void S_WriteLinearBlastStereo16()
|
|
{
|
|
int v1, v2;
|
|
|
|
for (int i = 0; i < snd_linear_count; i += 2)
|
|
{
|
|
v1 = snd_p[i] >> 8;
|
|
if (v1 > 32767)
|
|
v1 = 32767;
|
|
else if (v1 < -32768)
|
|
v1 = -32768;
|
|
|
|
v2 = snd_p[i+1] >> 8;
|
|
if (v2 > 32767)
|
|
v2 = 32767;
|
|
else if (v2 < -32768)
|
|
v2 = -32768;
|
|
|
|
*(uint32_t*)(&snd_out[i]) = (v2 << 16) | (v1 & 0xFFFF);
|
|
}
|
|
}
|
|
|
|
|
|
static void S_TransferStereo16( unsigned long* pbuf, int endtime )
|
|
{
|
|
int lpos;
|
|
int ls_paintedtime;
|
|
|
|
snd_p = (int *) paintbuffer;
|
|
ls_paintedtime = s_paintedtime;
|
|
|
|
while (ls_paintedtime < endtime)
|
|
{
|
|
// handle recirculating buffer issues
|
|
lpos = ls_paintedtime & ((dma.samples>>1)-1);
|
|
|
|
snd_out = (short *) pbuf + (lpos<<1);
|
|
|
|
snd_linear_count = (dma.samples>>1) - lpos;
|
|
if (ls_paintedtime + snd_linear_count > endtime)
|
|
snd_linear_count = endtime - ls_paintedtime;
|
|
|
|
snd_linear_count <<= 1;
|
|
|
|
// write a linear blast of samples
|
|
S_WriteLinearBlastStereo16();
|
|
|
|
snd_p += snd_linear_count;
|
|
ls_paintedtime += (snd_linear_count>>1);
|
|
|
|
if ( CL_VideoRecording() ) {
|
|
CL_WriteAVIAudioFrame( (byte *)snd_out, snd_linear_count << 1 );
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void S_TransferPaintBuffer( int endtime )
|
|
{
|
|
int out_idx;
|
|
int count;
|
|
int out_mask;
|
|
int *p;
|
|
int step;
|
|
int val;
|
|
unsigned long *pbuf;
|
|
|
|
pbuf = (unsigned long *)dma.buffer;
|
|
|
|
|
|
if ( s_testsound->integer ) {
|
|
int i;
|
|
|
|
// write a fixed sine wave
|
|
count = (endtime - s_paintedtime);
|
|
for (i=0 ; i<count ; i++)
|
|
paintbuffer[i].left = paintbuffer[i].right = sin((s_paintedtime+i)*0.1)*20000*256;
|
|
}
|
|
|
|
|
|
if (dma.samplebits == 16 && dma.channels == 2)
|
|
{ // optimized case
|
|
S_TransferStereo16 (pbuf, endtime);
|
|
}
|
|
else
|
|
{ // general case
|
|
p = (int *) paintbuffer;
|
|
count = (endtime - s_paintedtime) * dma.channels;
|
|
out_mask = dma.samples - 1;
|
|
out_idx = s_paintedtime * dma.channels & out_mask;
|
|
step = 3 - dma.channels;
|
|
|
|
if (dma.samplebits == 16)
|
|
{
|
|
short *out = (short *) pbuf;
|
|
while (count--)
|
|
{
|
|
val = *p >> 8;
|
|
p+= step;
|
|
if (val > 0x7fff)
|
|
val = 0x7fff;
|
|
else if (val < -32768)
|
|
val = -32768;
|
|
out[out_idx] = val;
|
|
out_idx = (out_idx + 1) & out_mask;
|
|
}
|
|
}
|
|
else if (dma.samplebits == 8)
|
|
{
|
|
unsigned char *out = (unsigned char *) pbuf;
|
|
while (count--)
|
|
{
|
|
val = *p >> 8;
|
|
p+= step;
|
|
if (val > 0x7fff)
|
|
val = 0x7fff;
|
|
else if (val < -32768)
|
|
val = -32768;
|
|
out[out_idx] = (val>>8) + 128;
|
|
out_idx = (out_idx + 1) & out_mask;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
===============================================================================
|
|
|
|
CHANNEL MIXING
|
|
|
|
===============================================================================
|
|
*/
|
|
|
|
|
|
static void S_PaintChannelFrom16( channel_t* ch, const sfx_t* sfx, int count, int sampleOffset, int bufferOffset )
|
|
{
|
|
portable_samplepair_t* samp = &paintbuffer[ bufferOffset ];
|
|
const sndBuffer* chunk = sfx->soundData;
|
|
|
|
while (sampleOffset >= SND_CHUNK_SIZE) {
|
|
chunk = chunk->next;
|
|
sampleOffset -= SND_CHUNK_SIZE;
|
|
if (!chunk) {
|
|
chunk = sfx->soundData;
|
|
}
|
|
}
|
|
|
|
int leftvol = ch->leftvol * snd_vol;
|
|
int rightvol = ch->rightvol * snd_vol;
|
|
const short* samples = chunk->sndChunk;
|
|
|
|
for (int i = 0; i < count; ++i) {
|
|
int data = samples[sampleOffset++];
|
|
samp[i].left += (data * leftvol) >> 8;
|
|
samp[i].right += (data * rightvol) >> 8;
|
|
|
|
if (sampleOffset == SND_CHUNK_SIZE) {
|
|
chunk = chunk->next;
|
|
samples = chunk->sndChunk;
|
|
sampleOffset = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
===================
|
|
S_PaintChannels
|
|
===================
|
|
*/
|
|
void S_PaintChannels( int endtime ) {
|
|
int i;
|
|
int end;
|
|
channel_t *ch;
|
|
const sfx_t* sfx;
|
|
int ltime, count;
|
|
int sampleOffset;
|
|
|
|
|
|
snd_vol = s_volume->value*255;
|
|
|
|
//Com_Printf ("%i to %i\n", s_paintedtime, endtime);
|
|
while ( s_paintedtime < endtime ) {
|
|
// if paintbuffer is smaller than DMA buffer
|
|
// we may need to fill it multiple times
|
|
end = endtime;
|
|
if ( endtime - s_paintedtime > PAINTBUFFER_SIZE ) {
|
|
end = s_paintedtime + PAINTBUFFER_SIZE;
|
|
}
|
|
|
|
// clear the paint buffer to either music or zeros
|
|
if ( s_rawend < s_paintedtime ) {
|
|
if ( s_rawend ) {
|
|
//Com_DPrintf ("background sound underrun\n");
|
|
}
|
|
Com_Memset(paintbuffer, 0, (end - s_paintedtime) * sizeof(portable_samplepair_t));
|
|
} else {
|
|
// copy from the streaming sound source
|
|
int s;
|
|
int stop;
|
|
|
|
stop = (end < s_rawend) ? end : s_rawend;
|
|
|
|
for ( i = s_paintedtime ; i < stop ; i++ ) {
|
|
s = i&(MAX_RAW_SAMPLES-1);
|
|
paintbuffer[i-s_paintedtime] = s_rawsamples[s];
|
|
}
|
|
// if (i != end)
|
|
// Com_Printf ("partial stream\n");
|
|
// else
|
|
// Com_Printf ("full stream\n");
|
|
for ( ; i < end ; i++ ) {
|
|
paintbuffer[i-s_paintedtime].left =
|
|
paintbuffer[i-s_paintedtime].right = 0;
|
|
}
|
|
}
|
|
|
|
// paint in the channels.
|
|
ch = s_channels;
|
|
for ( i = 0; i < MAX_CHANNELS ; i++, ch++ ) {
|
|
if ( !ch->thesfx || (!ch->leftvol && !ch->rightvol) ) {
|
|
continue;
|
|
}
|
|
|
|
ltime = s_paintedtime;
|
|
sfx = ch->thesfx;
|
|
|
|
if (sfx->soundData==NULL || sfx->soundLength==0) {
|
|
continue;
|
|
}
|
|
sampleOffset = ltime - ch->startSample;
|
|
count = end - ltime;
|
|
if ( sampleOffset + count > sfx->soundLength ) {
|
|
count = sfx->soundLength - sampleOffset;
|
|
}
|
|
|
|
if ( count > 0 ) {
|
|
S_PaintChannelFrom16( ch, sfx, count, sampleOffset, ltime - s_paintedtime );
|
|
}
|
|
}
|
|
|
|
// paint in the looped channels.
|
|
ch = loop_channels;
|
|
for ( i = 0; i < numLoopChannels ; i++, ch++ ) {
|
|
if ( !ch->thesfx || (!ch->leftvol && !ch->rightvol) ) {
|
|
continue;
|
|
}
|
|
|
|
ltime = s_paintedtime;
|
|
sfx = ch->thesfx;
|
|
|
|
if (sfx->soundData==NULL || sfx->soundLength==0) {
|
|
continue;
|
|
}
|
|
// we might have to make two passes if it
|
|
// is a looping sound effect and the end of
|
|
// the sample is hit
|
|
do {
|
|
sampleOffset = (ltime % sfx->soundLength);
|
|
|
|
count = end - ltime;
|
|
if ( sampleOffset + count > sfx->soundLength ) {
|
|
count = sfx->soundLength - sampleOffset;
|
|
}
|
|
|
|
if ( count > 0 ) {
|
|
S_PaintChannelFrom16( ch, sfx, count, sampleOffset, ltime - s_paintedtime );
|
|
ltime += count;
|
|
}
|
|
} while ( ltime < end);
|
|
}
|
|
|
|
// transfer out according to DMA format
|
|
S_TransferPaintBuffer( end );
|
|
s_paintedtime = end;
|
|
}
|
|
}
|