Yamagi Burmeister
parent
2b405405dc
commit
a8a61f0234
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@ -20,8 +20,8 @@
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* =======================================================================
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*
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* This code mixes two or more sound samples into one. It also
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* implements sample rate changing and per channel extraction. It's
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* called by the upper level sound framework, snd_dma.c
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* implements the calls to sample rate changing and per channel extraction.
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* It's called by the upper level sound framework, snd_dma.c
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*
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* =======================================================================
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*/
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@ -36,64 +36,9 @@ int snd_scaletable[32][256];
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int *snd_p, snd_linear_count, snd_vol;
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short *snd_out;
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void S_WriteLinearBlastStereo16 (void) {
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int i;
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int val;
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for (i=0 ; i<snd_linear_count ; i+=2) {
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val = snd_p[i]>>8;
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if (val > 0x7fff)
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snd_out[i] = 0x7fff;
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else if (val < (short)0x8000)
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snd_out[i] = (short)0x8000;
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else
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snd_out[i] = val;
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val = snd_p[i+1]>>8;
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if (val > 0x7fff)
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snd_out[i+1] = 0x7fff;
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else if (val < (short)0x8000)
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snd_out[i+1] = (short)0x8000;
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else
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snd_out[i+1] = val;
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}
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}
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void S_TransferStereo16 (unsigned long *pbuf, int endtime) {
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int lpos;
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int lpaintedtime;
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snd_p = (int *) paintbuffer;
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lpaintedtime = paintedtime;
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while (lpaintedtime < endtime) {
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/* handle recirculating buffer issues */
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lpos = lpaintedtime & ((dma.samples>>1)-1);
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snd_out = (short *) pbuf + (lpos<<1);
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snd_linear_count = (dma.samples>>1) - lpos;
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if (lpaintedtime + snd_linear_count > endtime)
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snd_linear_count = endtime - lpaintedtime;
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snd_linear_count <<= 1;
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/* write a linear blast of samples */
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S_WriteLinearBlastStereo16 ();
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snd_p += snd_linear_count;
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lpaintedtime += (snd_linear_count>>1);
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}
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}
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void S_TransferPaintBuffer(int endtime) {
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void
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S_TransferPaintBuffer ( int endtime )
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{
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int out_idx;
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int count;
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int out_mask;
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@ -104,211 +49,77 @@ void S_TransferPaintBuffer(int endtime) {
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pbuf = (unsigned long *) dma.buffer;
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if (s_testsound->value) {
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if ( s_testsound->value )
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{
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int i;
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int count;
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// write a fixed sine wave
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/* write a fixed sine wave */
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count = ( endtime - paintedtime );
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for (i=0 ; i<count ; i++)
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paintbuffer[i].left = paintbuffer[i].right = (int)((float)sin((paintedtime+i)*0.1f)*20000*256);
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for ( i = 0; i < count; i++ )
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{
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paintbuffer [ i ].left = paintbuffer [ i ].right = (int) ( (float) sin( ( paintedtime + i ) * 0.1f ) * 20000 * 256 );
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}
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}
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if (dma.samplebits == 16 && dma.channels == 2) {
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/* optimized case */
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S_TransferStereo16 (pbuf, endtime);
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} else {
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/* general case */
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p = (int *) paintbuffer;
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count = ( endtime - paintedtime ) * dma.channels;
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out_mask = dma.samples - 1;
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out_idx = paintedtime * dma.channels & out_mask;
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step = 3 - dma.channels;
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if (dma.samplebits == 16) {
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if ( dma.samplebits == 16 )
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{
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short *out = (short *) pbuf;
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while (count--) {
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while ( count-- )
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{
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val = *p >> 8;
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p += step;
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if ( val > 0x7fff )
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{
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val = 0x7fff;
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}
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else if ( val < (short) 0x8000 )
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{
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val = (short) 0x8000;
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}
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out [ out_idx ] = val;
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out_idx = ( out_idx + 1 ) & out_mask;
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}
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} else if (dma.samplebits == 8) {
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}
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else if ( dma.samplebits == 8 )
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{
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unsigned char *out = (unsigned char *) pbuf;
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while (count--) {
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while ( count-- )
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{
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val = *p >> 8;
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p += step;
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if ( val > 0x7fff )
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{
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val = 0x7fff;
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}
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else if ( val < (short) 0x8000 )
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{
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val = (short) 0x8000;
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}
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out [ out_idx ] = ( val >> 8 ) + 128;
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out_idx = ( out_idx + 1 ) & out_mask;
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}
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}
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}
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}
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void S_PaintChannelFrom8 (channel_t *ch, sfxcache_t *sc, int endtime, int offset);
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void S_PaintChannelFrom16 (channel_t *ch, sfxcache_t *sc, int endtime, int offset);
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void S_PaintChannels(int endtime) {
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int i;
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int end;
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channel_t *ch;
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sfxcache_t *sc;
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int ltime, count;
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playsound_t *ps;
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snd_vol = (int)(s_volume->value*256);
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while (paintedtime < endtime) {
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/* if paintbuffer is smaller than DMA buffer */
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end = endtime;
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if (endtime - paintedtime > PAINTBUFFER_SIZE)
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end = paintedtime + PAINTBUFFER_SIZE;
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/* start any playsounds */
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if (endtime - paintedtime > PAINTBUFFER_SIZE)
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end = paintedtime + PAINTBUFFER_SIZE;
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// start any playsounds
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for (;;)
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void
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S_PaintChannelFrom8 ( channel_t *ch, sfxcache_t *sc, int count, int offset )
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{
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ps = s_pendingplays.next;
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if (ps == NULL)
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break;
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if (ps == &s_pendingplays)
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break; // no more pending sounds
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if (ps->begin <= paintedtime)
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{
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S_IssuePlaysound (ps);
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continue;
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}
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if (ps->begin < end)
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end = ps->begin; // stop here
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break;
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}
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/* clear the paint buffer */
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if (s_rawend < paintedtime) {
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memset(paintbuffer, 0, (end - paintedtime) * sizeof(portable_samplepair_t));
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} else {
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/* copy from the streaming sound source */
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int s;
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int stop;
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stop = (end < s_rawend) ? end : s_rawend;
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for (i=paintedtime ; i<stop ; i++) {
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s = i&(MAX_RAW_SAMPLES-1);
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paintbuffer[i-paintedtime] = s_rawsamples[s];
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}
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for ( ; i<end ; i++) {
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paintbuffer[i-paintedtime].left = paintbuffer[i-paintedtime].right = 0;
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}
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}
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/* paint in the channels. */
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ch = channels;
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for (i=0; i<MAX_CHANNELS ; i++, ch++) {
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ltime = paintedtime;
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while (ltime < end) {
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if (!ch->sfx || (!ch->leftvol && !ch->rightvol) )
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break;
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/* max painting is to the end of the buffer */
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count = end - ltime;
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/* might be stopped by running out of data */
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if (ch->end - ltime < count)
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count = ch->end - ltime;
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sc = S_LoadSound (ch->sfx);
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if (!sc)
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break;
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if (count > 0 && ch->sfx) {
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if (sc->width == 1)
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S_PaintChannelFrom8(ch, sc, count, ltime - paintedtime);
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else
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S_PaintChannelFrom16(ch, sc, count, ltime - paintedtime);
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ltime += count;
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}
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/* if at end of loop, restart */
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if (ltime >= ch->end) {
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if (ch->autosound) {
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/* autolooping sounds always go back to start */
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ch->pos = 0;
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ch->end = ltime + sc->length;
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} else if (sc->loopstart >= 0) {
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ch->pos = sc->loopstart;
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ch->end = ltime + sc->length - ch->pos;
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} else {
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/* channel just stopped */
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ch->sfx = NULL;
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}
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}
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}
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}
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/* transfer out according to DMA format */
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S_TransferPaintBuffer(end);
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paintedtime = end;
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}
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}
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void S_InitScaletable (void) {
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int i, j;
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int scale;
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if (s_volume->value > 2.0f)
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Cvar_Set ("s_volume", "2");
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else if (s_volume->value < 0)
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Cvar_Set ("s_volume", "0");
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s_volume->modified = false;
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for (i=0 ; i<32 ; i++) {
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scale = (int)(i * 8 * 256 * s_volume->value);
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for (j=0 ; j<256 ; j++)
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snd_scaletable[i][j] = ((signed char)j) * scale;
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}
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}
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void S_PaintChannelFrom8 (channel_t *ch, sfxcache_t *sc, int count, int offset) {
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int data;
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int *lscale, *rscale;
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unsigned char *sfx;
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@ -316,10 +127,14 @@ void S_PaintChannelFrom8 (channel_t *ch, sfxcache_t *sc, int count, int offset)
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portable_samplepair_t *samp;
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if ( ch->leftvol > 255 )
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{
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ch->leftvol = 255;
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}
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if ( ch->rightvol > 255 )
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{
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ch->rightvol = 255;
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}
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lscale = snd_scaletable [ ch->leftvol >> 3 ];
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rscale = snd_scaletable [ ch->rightvol >> 3 ];
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@ -327,7 +142,8 @@ void S_PaintChannelFrom8 (channel_t *ch, sfxcache_t *sc, int count, int offset)
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samp = &paintbuffer [ offset ];
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for (i=0 ; i<count ; i++, samp++) {
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for ( i = 0; i < count; i++, samp++ )
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{
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data = sfx [ i ];
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samp->left += lscale [ data ];
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samp->right += rscale [ data ];
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@ -336,7 +152,9 @@ void S_PaintChannelFrom8 (channel_t *ch, sfxcache_t *sc, int count, int offset)
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ch->pos += count;
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}
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void S_PaintChannelFrom16 (channel_t *ch, sfxcache_t *sc, int count, int offset) {
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void
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S_PaintChannelFrom16 ( channel_t *ch, sfxcache_t *sc, int count, int offset )
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{
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int data;
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int left, right;
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int leftvol, rightvol;
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@ -350,7 +168,8 @@ void S_PaintChannelFrom16 (channel_t *ch, sfxcache_t *sc, int count, int offset)
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samp = &paintbuffer [ offset ];
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for (i=0 ; i<count ; i++, samp++) {
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for ( i = 0; i < count; i++, samp++ )
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{
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data = sfx [ i ];
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left = ( data * leftvol ) >> 8;
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right = ( data * rightvol ) >> 8;
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@ -361,3 +180,188 @@ void S_PaintChannelFrom16 (channel_t *ch, sfxcache_t *sc, int count, int offset)
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ch->pos += count;
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}
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void
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S_PaintChannels ( int endtime )
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{
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int i;
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int end;
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channel_t *ch;
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sfxcache_t *sc;
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int ltime, count;
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playsound_t *ps;
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snd_vol = (int) ( s_volume->value * 256 );
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while ( paintedtime < endtime )
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{
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/* if paintbuffer is smaller than DMA buffer */
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end = endtime;
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if ( endtime - paintedtime > PAINTBUFFER_SIZE )
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{
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end = paintedtime + PAINTBUFFER_SIZE;
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}
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/* start any playsounds */
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if ( endtime - paintedtime > PAINTBUFFER_SIZE )
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{
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end = paintedtime + PAINTBUFFER_SIZE;
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}
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/* start any playsounds */
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for ( ; ; )
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{
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ps = s_pendingplays.next;
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if ( ps == NULL )
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{
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break;
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}
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if ( ps == &s_pendingplays )
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{
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break; /* no more pending sounds */
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}
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if ( ps->begin <= paintedtime )
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{
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S_IssuePlaysound( ps );
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continue;
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}
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if ( ps->begin < end )
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{
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end = ps->begin; /* stop here */
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}
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break;
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}
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/* clear the paint buffer */
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if ( s_rawend < paintedtime )
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{
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memset( paintbuffer, 0, ( end - paintedtime ) * sizeof ( portable_samplepair_t ) );
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}
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else
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{
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/* copy from the streaming sound source */
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int s;
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int stop;
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stop = ( end < s_rawend ) ? end : s_rawend;
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for ( i = paintedtime; i < stop; i++ )
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{
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s = i & ( MAX_RAW_SAMPLES - 1 );
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paintbuffer [ i - paintedtime ] = s_rawsamples [ s ];
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}
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for ( ; i < end; i++ )
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{
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paintbuffer [ i - paintedtime ].left = paintbuffer [ i - paintedtime ].right = 0;
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}
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}
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/* paint in the channels. */
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ch = channels;
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for ( i = 0; i < MAX_CHANNELS; i++, ch++ )
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{
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ltime = paintedtime;
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while ( ltime < end )
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{
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if ( !ch->sfx || ( !ch->leftvol && !ch->rightvol ) )
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{
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break;
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}
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/* max painting is to the end of the buffer */
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count = end - ltime;
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/* might be stopped by running out of data */
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if ( ch->end - ltime < count )
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{
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count = ch->end - ltime;
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}
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sc = S_LoadSound( ch->sfx );
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if ( !sc )
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{
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break;
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}
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if ( ( count > 0 ) && ch->sfx )
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{
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if ( sc->width == 1 )
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{
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S_PaintChannelFrom8( ch, sc, count, ltime - paintedtime );
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}
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else
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{
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S_PaintChannelFrom16( ch, sc, count, ltime - paintedtime );
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}
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ltime += count;
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}
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/* if at end of loop, restart */
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if ( ltime >= ch->end )
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{
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if ( ch->autosound )
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{
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/* autolooping sounds always go back to start */
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ch->pos = 0;
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ch->end = ltime + sc->length;
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}
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else if ( sc->loopstart >= 0 )
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{
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ch->pos = sc->loopstart;
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ch->end = ltime + sc->length - ch->pos;
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}
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else
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{
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/* channel just stopped */
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ch->sfx = NULL;
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}
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}
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}
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}
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/* transfer out according to DMA format */
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S_TransferPaintBuffer( end );
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paintedtime = end;
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}
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}
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/* This is called from snd_dma.c */
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void
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S_InitScaletable ( void )
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{
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int i, j;
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int scale;
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if ( s_volume->value > 2.0f )
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{
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Cvar_Set( "s_volume", "2" );
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}
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else if ( s_volume->value < 0 )
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{
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Cvar_Set( "s_volume", "0" );
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}
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s_volume->modified = false;
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for ( i = 0; i < 32; i++ )
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{
|
||||
scale = (int) ( i * 8 * 256 * s_volume->value );
|
||||
|
||||
for ( j = 0; j < 256; j++ )
|
||||
{
|
||||
snd_scaletable [ i ] [ j ] = ( (signed char) j ) * scale;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue