1 files changed, 121 insertions, 0 deletions
diff --git a/backends/platform/psp/mp3.h b/backends/platform/psp/mp3.h
new file mode 100644
index 0000000000..029b3e498c
--- /dev/null
+++ b/backends/platform/psp/mp3.h
@@ -0,0 +1,121 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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.
+
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef SOUND_MP3_PSP_H
+#define SOUND_MP3_PSP_H
+
+#include "common/types.h"
+#include "common/scummsys.h"
+
+namespace Common {
+	class SeekableReadStream;
+}
+
+namespace Audio {
+
+class AudioStream;
+class SeekableAudioStream;
+
+class Mp3PspStream : public SeekableAudioStream {
+protected:
+	enum State {
+		MP3_STATE_INIT,		// Need to init the decoder
+		MP3_STATE_READY,	// ready for processing data
+		MP3_STATE_EOS		// end of data reached (may need to loop)
+	};
+
+	#define MAX_SAMPLES_PER_FRAME	2048 * 2
+	int16 _pcmSamples[MAX_SAMPLES_PER_FRAME] __attribute__((aligned(64)));	// samples to output PCM data into
+	byte _codecInBuffer[3072] __attribute__((aligned(64))); // the codec always needs alignment
+	unsigned long _codecParams[65]__attribute__((aligned(64)));		// TODO: change to struct
+
+	Common::SeekableReadStream *_inStream;
+	DisposeAfterUse::Flag _disposeAfterUse;
+	
+	uint32 _pcmLength;		// how many pcm samples we have (/2 for mono)
+	
+	uint _posInFrame;		// position in frame
+	State _state;			// what state the stream is in
+
+	Timestamp _length;
+	uint32 _sampleRate;
+
+	mad_timer_t _totalTime;
+	mad_stream _stream;		//
+	mad_header _header;		// This is all we need from libmad
+	
+	static bool _decoderInit;	// has the decoder been initialized
+	static bool _decoderFail;	// has the decoder failed to load
+	
+	enum {
+		BUFFER_SIZE = 5 * 8192
+	};
+
+	// This buffer contains a slab of input data
+	byte _buf[BUFFER_SIZE + MAD_BUFFER_GUARD];
+	
+	void decodeMP3Data();
+	void readMP3DataIntoBuffer();
+
+	static bool loadStartAudioModule(const char *modname, int partition);
+	int initStream();
+	void findValidHeader();
+	void deinitStream();
+
+	// to init and uninit ME decoder
+	static bool initDecoder();
+	static bool stopDecoder();
+	
+	// ME functions for stream
+	bool initStreamME();
+	void releaseStreamME();
+	
+public:
+	Mp3PspStream(Common::SeekableReadStream *inStream, DisposeAfterUse::Flag dispose);
+	~Mp3PspStream();
+	
+	// This function avoids having to create streams when it's not possible
+	static inline bool isOkToCreateStream() {
+		if (_decoderFail)			// fatal failure
+			return false;
+		if (!_decoderInit)			// if we're not initialized
+			if (!initDecoder())		// check if we failed init
+				return false;
+		return true;	
+	}
+
+	int readBuffer(int16 *buffer, const int numSamples);
+
+	bool endOfData() const		{ return _state == MP3_STATE_EOS; }
+	bool isStereo() const		{ return MAD_NCHANNELS(&_header) == 2; }
+	int getRate() const			{ return _sampleRate; }
+
+	bool seek(const Timestamp &where);
+	Timestamp getLength() const { return _length; }
+};
+
+} // End of namespace Audio
+
+#endif // #ifndef SOUND_MP3_PSP_H