From 53313f1415eca1cf26d91ca58793c20248161596 Mon Sep 17 00:00:00 2001
From: Oliver Schinagl <oliver@schinagl.nl>
Date: Tue, 18 Jan 2005 16:00:02 +0000
Subject: Added internal audio play functionality.

Still issue when playing sound. Appears to be signed /unsigned conversion problem. Do not use this functionality yet!
---
 Graphic_Equalizer/src/smartmedia.hcc | 101 +++++++++++++++++++++++++++++------
 1 file changed, 84 insertions(+), 17 deletions(-)

diff --git a/Graphic_Equalizer/src/smartmedia.hcc b/Graphic_Equalizer/src/smartmedia.hcc
index 77258cd..a69c79e 100644
--- a/Graphic_Equalizer/src/smartmedia.hcc
+++ b/Graphic_Equalizer/src/smartmedia.hcc
@@ -36,6 +36,9 @@
 #include "eventhandler_shared.hch"
 #include "display.hch" /* FIXME: temporary include, needs to be moved to 'init' */
 
+
+unsigned 1 physical_format;
+
 /*! \fn		unsigned 1 smartmedia_init(void);
  * \brief	We here initialize the Smart Media card and verify wether the
  *		card is inserted and such.
@@ -43,7 +46,7 @@
  * \return	We return 0 on success, 1 on error.
  * \retval	unsigned 1
  */
-unsigned 1 smartmedia_init(void) {
+inline unsigned 1 smartmedia_init(void) {
 	unsigned 1 retval;
 	/*
 	 * Firstly we enable both the CPLD.
@@ -58,6 +61,13 @@ unsigned 1 smartmedia_init(void) {
 	RC200SmartMediaReset(&retval);
 	delay;
 	RC200SmartMediaInit(&retval);
+
+	
+	/*
+	 * Before we enter our main Smart Media read loop we verify the format
+	 * of the SMC. This to ensure we use the correct functions later.
+	 */
+	RC200SmartMediaCheckLogicalFormat(&physical_format);
 	
 	return retval;	
 } /* --- smartmedia_init() --- */
@@ -90,16 +100,9 @@ void smartmedia_loaddata(skindata_t *skindata) {
 	unsigned AW address, address_end;
 	unsigned 8 mask, r, g, b;
 	unsigned 4 stage;
-	unsigned 1 physical_format;
 	unsigned 1 result;
 
-	extern ram unsigned 8 presets_default_values[768];
-
-	/*
-	 * Before we enter our main Smart Media read loop we verify the format
-	 * of the SMC. This to ensure we use the correct functions later.
-	 */
-	RC200SmartMediaCheckLogicalFormat(&physical_format);	
+	extern ram unsigned 8 presets_default_values[768];	
 
 	/*
 	 * We have several stages to go through. We stop once we pass the last
@@ -214,14 +217,6 @@ void smartmedia_loaddata(skindata_t *skindata) {
 				presets_default_values[address <- 10] = mask;
 			} else {
 				/*
-				 * There needs to be atleast one clock cycle
-				 * between setting the address and reading
-				 * from it. We therefore set the address before
-				 * reading from the SmartMedia as 'delay'.
-				 */
-				PalPL2RAMSetWriteAddress(RAM_BANK0, address);
-
-				/*
 				 * All other data has RGB image data and thus
 				 * we read those additional bytes from the SMC.
 				 * The image used for the graphic visualization
@@ -233,6 +228,14 @@ void smartmedia_loaddata(skindata_t *skindata) {
 				RC200SmartMediaRead(&b, FALSE);
 
 				/*
+				 * There needs to be atleast one clock cycle
+				 * between setting the address and reading
+				 * from it. We therefore set the address before
+				 * reading from the SmartMedia as 'delay'.
+				 */
+				PalPL2RAMSetWriteAddress(RAM_BANK0, address);
+
+				/*
 				 * FIXME: Do we need this even?
 				 */
 				data = 0 @ mask @ r @ g @ b;
@@ -311,3 +314,67 @@ void smartmedia_loaddata(skindata_t *skindata) {
 
 	skindata->equalizer.color_primary = PIXEL_EQUALIZER;
 } /* --- smartmedia_loaddata() --- */
+
+/*
+smartmedia_load_block() {
+	
+	setaddress();
+	for () {
+		smart_read();
+	}
+	end();
+}*/
+
+
+unsigned 1 load_audio_samples(signed 18 *samples, unsigned 27 blockoffset, unsigned 7 sample_count) {
+	ram unsigned 8 data[128];
+	
+	unsigned 16 sampleword;
+	unsigned 8 sampleindex, samplebyte, samplecount;
+	unsigned 1 result;
+	unsigned 1 retval;
+	
+	samplecount = (0 @ sample_count) <<1;
+	sampleindex = 0;
+	retval = 0;
+
+	if (!blockoffset) {
+//		print_string("Setting Address");
+		if (physical_format) 
+		{
+			RC200SmartMediaSetAddress(READ, SMARTMEDIA_ADDRESS_AUDIO_START);
+		} else {
+			RC200SmartMediaSetLogicalAddress(READ, SMARTMEDIA_ADDRESS_AUDIO_START);
+		}
+	}
+	
+	smartmedia_read_bytes(data, samplecount);
+
+	while (sampleindex != samplecount) {
+		samplebyte = data[sampleindex <- 7];
+		sampleword = samplebyte @ data[(sampleindex +1) <- 7];
+		samples[sampleindex >>1] = (signed 18)(sampleword @ 0);
+		sampleindex +=2;
+	}
+
+	if (((blockoffset <<7) +(0 @ samplecount) +SMARTMEDIA_ADDRESS_AUDIO_START) >= SMARTMEDIA_ADDRESS_AUDIO_END) {
+		RC200SmartMediaRead(&samplebyte, TRUE);
+		RC200SmartMediaOperationEnd(&result);
+		retval = 1;
+//		print_string("Operation end");
+	}
+	return retval;
+}
+
+void smartmedia_read_bytes(unsigned 8 *data, unsigned 8 bytecount) 
+{
+	unsigned 8 byteindex;
+
+	byteindex = 0;
+	while (byteindex != bytecount) {
+		RC200SmartMediaRead(&data[byteindex], FALSE);
+		byteindex++;
+	}
+//	print_eol();
+//	print_string(".");
+}
\ No newline at end of file
-- 
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