mirror of
https://github.com/libretro/scummvm.git
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144 lines
4.2 KiB
C++
144 lines
4.2 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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/**
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* Internal interface to the QuickTime audio decoder.
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*
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* This is available so that the QuickTimeVideoDecoder can use
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* this directly.
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*/
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#ifndef AUDIO_QUICKTIME_INTERN_H
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#define AUDIO_QUICKTIME_INTERN_H
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#include "common/quicktime.h"
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#include "common/scummsys.h"
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#include "common/types.h"
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#include "audio/audiostream.h"
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namespace Common {
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class SeekableReadStream;
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class String;
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}
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namespace Audio {
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class Codec;
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class QuickTimeAudioDecoder : public Common::QuickTimeParser {
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public:
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QuickTimeAudioDecoder();
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virtual ~QuickTimeAudioDecoder();
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/**
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* Load a QuickTime audio file
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* @param filename the filename to load
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*/
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bool loadAudioFile(const Common::String &filename);
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/**
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* Load a QuickTime audio file from a SeekableReadStream
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* @param stream the stream to load
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*/
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bool loadAudioStream(Common::SeekableReadStream *stream, DisposeAfterUse::Flag disposeFileHandle);
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protected:
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class QuickTimeAudioTrack : public SeekableAudioStream {
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public:
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QuickTimeAudioTrack(QuickTimeAudioDecoder *decoder, Track *parentTrack);
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~QuickTimeAudioTrack();
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// AudioStream API
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int readBuffer(int16 *buffer, const int numSamples);
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bool isStereo() const { return _queue->isStereo(); }
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int getRate() const { return _queue->getRate(); }
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bool endOfData() const;
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// SeekableAudioStream API
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bool seek(const Timestamp &where);
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Timestamp getLength() const;
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// Queue *at least* "length" audio
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// If length is zero, it queues the next logical block of audio whether
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// that be a whole edit or just one chunk within an edit
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void queueAudio(const Timestamp &length = Timestamp());
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Track *getParent() const { return _parentTrack; }
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void queueRemainingAudio();
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bool hasDataInQueue() const { return _samplesQueued != 0; }
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private:
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QuickTimeAudioDecoder *_decoder;
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Track *_parentTrack;
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QueuingAudioStream *_queue;
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uint _curChunk;
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Timestamp _curMediaPos, _skipSamples;
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uint32 _curEdit, _samplesQueued;
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bool _skipAACPrimer;
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QueuingAudioStream *createStream() const;
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AudioStream *readAudioChunk(uint chunk);
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bool isOldDemuxing() const;
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void skipSamples(const Timestamp &length, AudioStream *stream);
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void findEdit(const Timestamp &position);
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bool allDataRead() const;
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void enterNewEdit(const Timestamp &position);
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void queueStream(AudioStream *stream, const Timestamp &length);
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uint32 getAudioChunkSampleCount(uint chunk) const;
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Timestamp getChunkLength(uint chunk, bool skipAACPrimer = false) const;
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uint32 getAACSampleTime(uint32 totalSampleCount, bool skipAACPrimer = false) const;
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Timestamp getCurrentTrackTime() const;
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};
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class AudioSampleDesc : public Common::QuickTimeParser::SampleDesc {
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public:
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AudioSampleDesc(Common::QuickTimeParser::Track *parentTrack, uint32 codecTag);
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~AudioSampleDesc();
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bool isAudioCodecSupported() const;
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AudioStream *createAudioStream(Common::SeekableReadStream *stream) const;
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void initCodec();
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// TODO: Make private in the long run
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uint16 _bitsPerSample;
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uint16 _channels;
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uint32 _sampleRate;
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uint32 _samplesPerFrame;
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uint32 _bytesPerFrame;
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private:
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Codec *_codec;
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};
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// Common::QuickTimeParser API
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virtual Common::QuickTimeParser::SampleDesc *readSampleDesc(Track *track, uint32 format, uint32 descSize);
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void init();
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Common::Array<QuickTimeAudioTrack *> _audioTracks;
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};
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} // End of namespace Audio
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#endif
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