forked from bartvdbraak/blender
174eccf078
* Refactored the whole audaspace library to use float as sample format over all readers. * Added new Readers like the linear resampler, envelope, lowpass, highpass and butterworth. * Note: The butterworth filter isn't working correctly, some bug in there... Maybe also true for the envelope. * Added a sound to f-curve operator that behaves mostly like the soundtracker script of technoestupido.
151 lines
3.5 KiB
C++
151 lines
3.5 KiB
C++
/*
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* $Id$
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*
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* ***** BEGIN LGPL LICENSE BLOCK *****
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*
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* Copyright 2009 Jörg Hermann Müller
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*
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* This file is part of AudaSpace.
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*
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* AudaSpace is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* AudaSpace 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with AudaSpace. If not, see <http://www.gnu.org/licenses/>.
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*
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* ***** END LGPL LICENSE BLOCK *****
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*/
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#ifndef AUD_FFMPEGREADER
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#define AUD_FFMPEGREADER
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#include "AUD_ConverterFunctions.h"
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#include "AUD_IReader.h"
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#include "AUD_Reference.h"
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class AUD_Buffer;
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struct AVCodecContext;
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extern "C" {
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#include <libavformat/avformat.h>
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}
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/**
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* This class reads a sound file via ffmpeg.
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* \warning Seeking may not be accurate! Moreover the position is updated after
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* a buffer reading call. So calling getPosition right after seek
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* normally results in a wrong value.
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* \warning Playback of an ogg with some outdated ffmpeg versions results in a
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* segfault on windows.
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*/
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class AUD_FFMPEGReader : public AUD_IReader
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{
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private:
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/**
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* The current position in samples.
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*/
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int m_position;
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/**
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* The playback buffer.
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*/
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AUD_Buffer *m_buffer;
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/**
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* The specification of the audio data.
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*/
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AUD_DeviceSpecs m_specs;
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/**
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* The buffer for package reading.
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*/
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AUD_Buffer *m_pkgbuf;
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/**
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* The count of samples still available from the last read package.
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*/
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int m_pkgbuf_left;
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/**
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* The AVFormatContext structure for using ffmpeg.
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*/
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AVFormatContext* m_formatCtx;
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/**
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* The AVCodecContext structure for using ffmpeg.
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*/
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AVCodecContext* m_codecCtx;
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/**
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* The ByteIOContext to read the data from.
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*/
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ByteIOContext* m_byteiocontext;
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/**
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* The stream ID in the file.
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*/
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int m_stream;
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/**
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* Converter function.
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*/
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AUD_convert_f m_convert;
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/**
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* The memory file to read from, only saved to keep the buffer alive.
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*/
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AUD_Reference<AUD_Buffer> m_membuffer;
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/**
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* Decodes a packet into the given buffer.
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* \param packet The AVPacket to decode.
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* \param buffer The target buffer.
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* \return The count of read bytes.
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*/
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int decode(AVPacket* packet, AUD_Buffer* buffer);
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/**
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* Initializes the object.
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*/
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void init();
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public:
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/**
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* Creates a new reader.
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* \param filename The path to the file to be read.
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* \exception AUD_Exception Thrown if the file specified does not exist or
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* cannot be read with ffmpeg.
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*/
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AUD_FFMPEGReader(const char* filename);
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/**
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* Creates a new reader.
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* \param buffer The buffer to read from.
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* \exception AUD_Exception Thrown if the buffer specified cannot be read
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* with ffmpeg.
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*/
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AUD_FFMPEGReader(AUD_Reference<AUD_Buffer> buffer);
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/**
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* Destroys the reader and closes the file.
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*/
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virtual ~AUD_FFMPEGReader();
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virtual bool isSeekable();
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virtual void seek(int position);
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virtual int getLength();
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virtual int getPosition();
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virtual AUD_Specs getSpecs();
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virtual AUD_ReaderType getType();
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virtual bool notify(AUD_Message &message);
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virtual void read(int & length, sample_t* & buffer);
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};
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#endif //AUD_FFMPEGREADER
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