ARM version of central ADPCM decoding block for NDS. Define ARM_ADPCM to

enable.

Apparently may not be required as this isn't speed critical - but I've
written it now, so seems a shame to lose it.

svn-id: r29980

1 files changed, 13 insertions, 1 deletions

diff --git a/backends/platform/ds/arm9/source/cdaudio.cpp b/backends/platform/ds/arm9/source/cdaudio.cpp
index 2b285e782a..9569a820f2 100644
--- a/backends/platform/ds/arm9/source/cdaudio.cpp
+++ b/backends/platform/ds/arm9/source/cdaudio.cpp
@@ -244,6 +244,11 @@ void update() {
 	playNextBlock();
 }
 
+#ifdef ARM_ADPCM
+extern "C" void ARM_adcpm(int *block, int len, int stepTableIndex,
+                          int firstSample, s16 *decompressionBuffer);
+#endif
+
 void decompressBlock() {
 	int block[2048];
 	bool loop = false;
@@ -294,7 +299,13 @@ void decompressBlock() {
 			return;
 		}
 	}
-		
+
+#ifdef ARM_ADPCM
+	ARM_adpcm(block, waveHeader.fmtExtra,
+	          blockHeader.stepTableIndex,
+	          blockHeader.firstSample,
+	          decompressionBuffer);
+#else		
 	// First sample is in header
 	decompressionBuffer[0] = blockHeader.firstSample;
 	
@@ -387,6 +398,7 @@ void decompressBlock() {
 		
 
 	}
+#endif
 }
 
 void playNextBlock() {