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engines/grim/emi/sound/codecs/scx.h

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+/* 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef GRIM_SCX_H
+#define GRIM_SCX_H
+
+namespace Common {
+	class SeekableReadStream;
+}
+
+namespace Grim {
+
+// I've only ever seen up to two
+#define SCX_MAX_CHANNELS 2
+
+class SCXStream : public Audio::RewindableAudioStream {
+public:
+	SCXStream(Common::SeekableReadStream *stream, const Audio::Timestamp *start, DisposeAfterUse::Flag disposeAfterUse);
+	~SCXStream();
+
+	bool isStereo() const override { return _channels == 2; }
+	bool endOfData() const override { return _xaStreams[0]->endOfData(); }
+	int getRate() const override { return _rate; }
+	int readBuffer(int16 *buffer, const int numSamples) override;
+
+	bool rewind() override;
+	Audio::Timestamp getPos() const;
+
+private:
+	int _channels;
+	int _rate;
+	uint16 _blockSize;
+
+	Common::SeekableReadStream *_fileStreams[SCX_MAX_CHANNELS];
+	Audio::RewindableAudioStream *_xaStreams[SCX_MAX_CHANNELS];
+};
+
+/**
+ * Takes an input stream containing SCX sound data and creates
+ * a RewindableAudioStream from that.
+ *
+ * @param stream            the SeekableReadStream from which to read the SCX data
+ * @param disposeAfterUse   whether to delete the stream after use
+ * @return   a new RewindableAudioStream, or NULL, if an error occurred
+ */
+SCXStream *makeSCXStream(
+	Common::SeekableReadStream *stream,
+	const Audio::Timestamp *start,
+	DisposeAfterUse::Flag disposeAfterUse = DisposeAfterUse::YES);
+
+} // End of namespace Grim
+
+#endif