Initial commit.

code/mac/mac_snddma.c

@@ -0,0 +1,140 @@
+
+// mac_snddma.c
+// all other sound mixing is portable
+
+#include "../client/snd_local.h"
+#include <sound.h>
+
+#define	MAX_MIXED_SAMPLES	0x8000
+#define	SUBMISSION_CHUNK	0x100
+
+static	short			s_mixedSamples[MAX_MIXED_SAMPLES];
+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 * SUBMISSION_CHUNK ) & (MAX_MIXED_SAMPLES-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 = SUBMISSION_CHUNK / 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;
+	
+	// create a sound channel
+	s_sndChan = NULL;
+	err = SndNewChannel( &s_sndChan, sampledSynth, initStereo, NewSndCallBackProc(S_Callback) );
+	if ( err ) {
+		return false;
+	}
+	
+	dma.channels = 2;
+	dma.samples = MAX_MIXED_SAMPLES;
+	dma.submission_chunk = SUBMISSION_CHUNK;
+	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 * SUBMISSION_CHUNK;
+}
+
+/*
+===============
+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) {
+}