diff options
Diffstat (limited to 'code/macosx/macosx_snddma.m')
| -rwxr-xr-x | code/macosx/macosx_snddma.m | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/code/macosx/macosx_snddma.m b/code/macosx/macosx_snddma.m new file mode 100755 index 0000000..670a447 --- /dev/null +++ b/code/macosx/macosx_snddma.m @@ -0,0 +1,205 @@ +/*
+===========================================================================
+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 Foobar; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+===========================================================================
+*/
+
+// mac_snddma.c
+// all other sound mixing is portable
+
+#include "../client/snd_local.h"
+#include <Carbon/Carbon.h>
+
+// For 'ri'
+#include "../renderer/tr_local.h"
+
+#import <Foundation/NSZone.h>
+
+// TJW - Different versions of SoundManager have different DMA buffer sizes. On MacOS X DP2,
+// the buffer size is 8K. On MacOS 9 it is much smaller. The SoundManager guy at Apple says
+// that the size of the buffer will be decreasing for final release to help get rid of latency.
+//#define MAX_MIXED_SAMPLES (0x8000 * 64)
+//#define SUBMISSION_CHUNK (0x100 * 64)
+
+// Original MacOS 9 sizes
+//#define MAX_MIXED_SAMPLES 0x8000
+//#define SUBMISSION_CHUNK 0x100
+
+
+static unsigned int submissionChunk;
+static unsigned int maxMixedSamples;
+
+static short *s_mixedSamples;
+static int s_chunkCount; // number of chunks submitted
+static SndChannel *s_sndChan;
+static ExtSoundHeader s_sndHeader;
+
+/*
+===============
+S_Callback
+===============
+*/
+void S_Callback( SndChannel *sc, SndCommand *cmd )
+{
+ SndCommand mySndCmd;
+ SndCommand mySndCmd2;
+ int offset;
+
+ offset = ( s_chunkCount * submissionChunk ) & (maxMixedSamples-1);
+
+ // queue up another sound buffer
+ memset( &s_sndHeader, 0, sizeof( s_sndHeader ) );
+ s_sndHeader.samplePtr = (void *)(s_mixedSamples + offset);
+ s_sndHeader.numChannels = 2;
+ s_sndHeader.sampleRate = rate22khz;
+ s_sndHeader.loopStart = 0;
+ s_sndHeader.loopEnd = 0;
+ s_sndHeader.encode = extSH;
+ s_sndHeader.baseFrequency = 1;
+ s_sndHeader.numFrames = submissionChunk / 2;
+ s_sndHeader.markerChunk = NULL;
+ s_sndHeader.instrumentChunks = NULL;
+ s_sndHeader.AESRecording = NULL;
+ s_sndHeader.sampleSize = 16;
+
+ mySndCmd.cmd = bufferCmd;
+ mySndCmd.param1 = 0;
+ mySndCmd.param2 = (int)&s_sndHeader;
+ SndDoCommand( sc, &mySndCmd, true );
+
+ // and another callback
+ mySndCmd2.cmd = callBackCmd;
+ mySndCmd2.param1 = 0;
+ mySndCmd2.param2 = 0;
+ SndDoCommand( sc, &mySndCmd2, true );
+
+ s_chunkCount++; // this is the next buffer we will submit
+}
+
+/*
+===============
+S_MakeTestPattern
+===============
+*/
+void S_MakeTestPattern( void ) {
+ int i;
+ float v;
+ int sample;
+
+ for ( i = 0 ; i < dma.samples / 2 ; i ++ ) {
+ v = sin( M_PI * 2 * i / 64 );
+ sample = v * 0x4000;
+ ((short *)dma.buffer)[i*2] = sample;
+ ((short *)dma.buffer)[i*2+1] = sample;
+ }
+}
+
+/*
+===============
+SNDDMA_Init
+===============
+*/
+qboolean SNDDMA_Init(void)
+{
+ int err;
+ cvar_t *bufferSize;
+ cvar_t *chunkSize;
+
+ chunkSize = ri.Cvar_Get( "s_chunksize", "8192", CVAR_ARCHIVE );
+ bufferSize = ri.Cvar_Get( "s_buffersize", "65536", CVAR_ARCHIVE );
+
+ if (!chunkSize->integer) {
+ ri.Error(ERR_FATAL, "snd_chunkSize must be non-zero\n");
+ }
+
+ if (!bufferSize->integer) {
+ ri.Error(ERR_FATAL, "snd_bufferSize must be non-zero\n");
+ }
+
+ if (chunkSize->integer >= bufferSize->integer) {
+ ri.Error(ERR_FATAL, "snd_chunkSize must be less than snd_bufferSize\n");
+ }
+
+ if (bufferSize->integer % chunkSize->integer) {
+ ri.Error(ERR_FATAL, "snd_bufferSize must be an even multiple of snd_chunkSize\n");
+ }
+
+ // create a sound channel
+ s_sndChan = NULL;
+ err = SndNewChannel( &s_sndChan, sampledSynth, initStereo, NewSndCallBackProc(S_Callback) );
+ if ( err ) {
+ return false;
+ }
+
+ submissionChunk = chunkSize->integer;
+ maxMixedSamples = bufferSize->integer;
+
+ s_mixedSamples = NSZoneMalloc(NULL, sizeof(*s_mixedSamples) * maxMixedSamples);
+
+ dma.channels = 2;
+ dma.samples = maxMixedSamples;
+ dma.submission_chunk = submissionChunk;
+ dma.samplebits = 16;
+ dma.speed = 22050;
+ dma.buffer = (byte *)s_mixedSamples;
+
+ // que up the first submission-chunk sized buffer
+ s_chunkCount = 0;
+
+ S_Callback( s_sndChan, NULL );
+
+ return qtrue;
+}
+
+/*
+===============
+SNDDMA_GetDMAPos
+===============
+*/
+int SNDDMA_GetDMAPos(void) {
+ return s_chunkCount * submissionChunk;
+}
+
+/*
+===============
+SNDDMA_Shutdown
+===============
+*/
+void SNDDMA_Shutdown(void) {
+ if ( s_sndChan ) {
+ SndDisposeChannel( s_sndChan, true );
+ s_sndChan = NULL;
+ }
+}
+
+/*
+===============
+SNDDMA_BeginPainting
+===============
+*/
+void SNDDMA_BeginPainting(void) {
+}
+
+/*
+===============
+SNDDMA_Submit
+===============
+*/
+void SNDDMA_Submit(void) {
+}
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