From d3ad5fc663cbbfa4c01fbfbf5cfe6f7df82e7d10 Mon Sep 17 00:00:00 2001
From: Norbert Lange
Date: Mon, 8 Jun 2009 18:33:20 +0000
Subject: Initital commit modifying buildsystem and adding a TFMX Module-Player

Changes in Paula.cpp/Paula.h + soundfx.cpp:
Added (easy) queueing of samples by implementing methods that act similar
like writes to the Amiga-Chipset would.
Added counting of DMA-Interrupts, that is how often a sample finished
playing.
Added a base for the interrupt-interval, in most cases this will be the
Cia-clockrate. Derived classes can then set the interval without scaling to
the samplerate

Changes in common/scummsys.h:
Only disable warnings with pragmas for MS Compilers that cant do so
otherwise. Newer MSVC Versions can and should disable warnings in the
Project-Settings.

Files in tfmx:
Some files for debugging. Wont ever be commited back into trunk so those
will contain some messy and hackish code

Added: tfmx.h/tfmx.cpp
Player for TFMX-Modules.

Rest: main.cpp etc.
Modified buildsystem to include new directory, modified main.cpp so it
calls tfmxmain (tfmxplayer.cpp) instead of starting the GUI.

svn-id: r41382
---
 sound/mods/paula.h | 74 ++++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 66 insertions(+), 8 deletions(-)

(limited to 'sound/mods/paula.h')

diff --git a/sound/mods/paula.h b/sound/mods/paula.h
index e3c6002451..5e32dc8580 100644
--- a/sound/mods/paula.h
+++ b/sound/mods/paula.h
@@ -40,12 +40,27 @@ namespace Audio {
 class Paula : public AudioStream {
 public:
 	static const int NUM_VOICES = 4;
+	enum {
+		kPalSystemClock		= 7093790,
+		kNtscSystemClock	= 7159090,
+		kPalCiaClock		= kPalSystemClock / 10,
+		kNtscCiaClock		= kNtscSystemClock / 10
+	};
 
-	Paula(bool stereo = false, int rate = 44100, int interruptFreq = 0);
+	Paula(bool stereo = false, int rate = 44100, uint interruptFreq = 0);
 	~Paula();
 
 	bool playing() const { return _playing; }
-	void setInterruptFreq(int freq) { _curInt = _intFreq = freq; }
+	void setTimerBaseValue( uint32 ticksPerSecond ) { _timerBase = ticksPerSecond; }
+	uint32 getTimerBaseValue() { return _timerBase; }
+	void setSingleInterrupt(uint sampleDelay) { assert(sampleDelay < _intFreq); _curInt = sampleDelay; }
+	void setSingleInterruptUnscaled(uint timerDelay) { 
+		setSingleInterrupt((uint)(((double)timerDelay * getRate()) / _timerBase));
+	}
+	void setInterruptFreq(uint sampleDelay) { _intFreq = sampleDelay; _curInt = 0; }
+	void setInterruptFreqUnscaled(uint timerDelay) { 
+		setInterruptFreq((uint)(((double)timerDelay * getRate()) / _timerBase));
+	}
 	void clearVoice(byte voice);
 	void clearVoices() { for (int i = 0; i < NUM_VOICES; ++i) clearVoice(i); }
 	void startPlay(void) { _playing = true; }
@@ -65,9 +80,11 @@ protected:
 		uint32 length;
 		uint32 lengthRepeat;
 		int16 period;
+		int16 periodRepeat;
 		byte volume;
 		frac_t offset;
 		byte panning; // For stereo mixing: 0 = far left, 255 = far right
+		int dmaCount;
 	};
 
 	bool _end;
@@ -90,9 +107,24 @@ protected:
 		_voice[channel].panning = panning;
 	}
 
+	void disableChannel(byte channel) {
+		assert(channel < NUM_VOICES);
+		_voice[channel].data = 0;
+	}
+
+	void enableChannel(byte channel) {
+		assert(channel < NUM_VOICES);
+		Channel &ch = _voice[channel];
+		ch.data = ch.dataRepeat;
+		ch.length = ch.lengthRepeat;
+		// actually first 2 bytes are dropped?
+		ch.offset = intToFrac(0);
+		ch.period = ch.periodRepeat;
+	}
+
 	void setChannelPeriod(byte channel, int16 period) {
 		assert(channel < NUM_VOICES);
-		_voice[channel].period = period;
+		_voice[channel].periodRepeat = period;
 	}
 
 	void setChannelVolume(byte channel, byte volume) {
@@ -100,6 +132,17 @@ protected:
 		_voice[channel].volume = volume;
 	}
 
+	void setChannelSampleStart(byte channel, const int8 *data) {
+		assert(channel < NUM_VOICES);
+		_voice[channel].dataRepeat = data;
+	}
+
+	void setChannelSampleLen(byte channel, uint32 length) {
+		assert(channel < NUM_VOICES);
+		assert(length < 32768/2);
+		_voice[channel].lengthRepeat = 2 * length;
+	}
+
 	void setChannelData(uint8 channel, const int8 *data, const int8 *dataRepeat, uint32 length, uint32 lengthRepeat, int32 offset = 0) {
 		assert(channel < NUM_VOICES);
 
@@ -110,11 +153,14 @@ protected:
 		assert(lengthRepeat < 32768);
 
 		Channel &ch = _voice[channel];
-		ch.data = data;
+
+		ch.dataRepeat = data;
+		ch.lengthRepeat = length;
+		enableChannel(channel);
+		ch.offset = intToFrac(offset);
+
 		ch.dataRepeat = dataRepeat;
-		ch.length = length;
 		ch.lengthRepeat = lengthRepeat;
-		ch.offset = intToFrac(offset);
 	}
 
 	void setChannelOffset(byte channel, frac_t offset) {
@@ -128,13 +174,25 @@ protected:
 		return _voice[channel].offset;
 	}
 
+	int getChannelDmaCount(byte channel) {
+		assert(channel < NUM_VOICES);
+		return _voice[channel].dmaCount;
+	}
+
+	void setChannelDmaCount(byte channel, int dmaVal = 0) {
+		assert(channel < NUM_VOICES);
+		_voice[channel].dmaCount = dmaVal;
+	}
+
 private:
 	Channel _voice[NUM_VOICES];
 
 	const bool _stereo;
 	const int _rate;
-	int _intFreq;
-	int _curInt;
+	const double _periodScale;
+	uint _intFreq;
+	uint _curInt;
+	uint32 _timerBase;
 	bool _playing;
 
 	template<bool stereo>
-- 
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