1 /* ScummVM - Graphic Adventure Engine
2  *
3  * ScummVM is the legal property of its developers, whose names
4  * are too numerous to list here. Please refer to the COPYRIGHT
5  * file distributed with this source distribution.
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License
9  * as published by the Free Software Foundation; either version 2
10  * of the License, or (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20  *
21  */
22 
23 #ifndef BLADERUNNER_AUD_STREAM_H
24 #define BLADERUNNER_AUD_STREAM_H
25 
26 #include "bladerunner/adpcm_decoder.h"
27 
28 #include "audio/audiostream.h"
29 #include "common/endian.h"
30 #include "common/types.h"
31 
32 namespace BladeRunner {
33 
34 class AudioCache;
35 
36 class AudStream : public Audio::RewindableAudioStream {
37 	byte       *_data;
38 	byte       *_p;
39 	byte       *_end;
40 	AudioCache *_cache;
41 	int32       _hash;
42 	uint16      _deafBlockRemain;
43 	uint16      _frequency;
44 	uint32      _size;
45 	uint32      _sizeDecompressed;
46 	byte        _flags;
47 	byte        _compressionType;
48 	int         _overrideFrequency;
49 
50 	ADPCMWestwoodDecoder _decoder;
51 
52 	void init(byte *data);
53 
54 public:
55 	AudStream(byte *data, int overrideFrequency = -1);
56 	AudStream(AudioCache *cache, int32 hash, int overrideFrequency = -1);
57 	~AudStream() override;
58 
59 	int readBuffer(int16 *buffer, const int numSamples) override;
isStereo()60 	bool isStereo() const override { return false; }
getRate()61 	int getRate() const override { return _overrideFrequency > 0 ? _overrideFrequency : _frequency; };
endOfData()62 	bool endOfData() const override { return _p == _end; }
63 	bool rewind() override;
64 	uint32 getLength() const;
65 	bool startAtSecond(uint32 startSecond);
66 	int getBytesPerSecond() const;
67 };
68 
69 } // End of namespace BladeRunner
70 
71 #endif
72