bdbc7e12a0
On the blender side this commit fixes importing video files with audio and video streams that do not share the same start time and duration. Differential Revision: https://developer.blender.org/D12353
93 lines
3.0 KiB
C++
93 lines
3.0 KiB
C++
/*******************************************************************************
|
|
* Copyright 2009-2016 Jörg Müller
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
******************************************************************************/
|
|
|
|
#pragma once
|
|
|
|
/**
|
|
* @file IReader.h
|
|
* @ingroup general
|
|
* The IReader interface.
|
|
*/
|
|
|
|
#include "respec/Specification.h"
|
|
|
|
AUD_NAMESPACE_BEGIN
|
|
|
|
/**
|
|
* @interface IReader
|
|
* This class represents a sound source as stream or as buffer which can be read
|
|
* for example by another reader, a device or whatever.
|
|
*/
|
|
class AUD_API IReader
|
|
{
|
|
public:
|
|
/**
|
|
* Destroys the reader.
|
|
*/
|
|
virtual ~IReader() {}
|
|
|
|
/**
|
|
* Tells whether the source provides seeking functionality or not.
|
|
* \warning This doesn't mean that the seeking always has to succeed.
|
|
* \return Always returns true for readers of buffering types.
|
|
*/
|
|
virtual bool isSeekable() const=0;
|
|
|
|
/**
|
|
* Seeks to a specific position in the source.
|
|
* \param position The position to seek for measured in samples. To get
|
|
* from a given time to the samples you simply have to multiply the
|
|
* time value in seconds with the sample rate of the reader.
|
|
* \warning This may work or not, depending on the actual reader.
|
|
*/
|
|
virtual void seek(int position)=0;
|
|
|
|
/**
|
|
* Returns an approximated length of the source in samples.
|
|
* \return The length as sample count. May be negative if unknown.
|
|
*/
|
|
virtual int getLength() const=0;
|
|
|
|
/**
|
|
* Returns the position of the source as a sample count value.
|
|
* \return The current position in the source. A negative value indicates
|
|
* that the position is unknown.
|
|
* \warning The value returned doesn't always have to be correct for readers,
|
|
* especially after seeking.
|
|
*/
|
|
virtual int getPosition() const=0;
|
|
|
|
/**
|
|
* Returns the specification of the reader.
|
|
* \return The Specs structure.
|
|
*/
|
|
virtual Specs getSpecs() const=0;
|
|
|
|
/**
|
|
* Request to read the next length samples out of the source.
|
|
* The buffer supplied has the needed size.
|
|
* \param[in,out] length The count of samples that should be read. Shall
|
|
* contain the real count of samples after reading, in case
|
|
* there were only fewer samples available.
|
|
* A smaller value also indicates the end of the reader.
|
|
* \param[out] eos End of stream, whether the end is reached or not.
|
|
* \param[in] buffer The pointer to the buffer to read into.
|
|
*/
|
|
virtual void read(int& length, bool& eos, sample_t* buffer)=0;
|
|
};
|
|
|
|
AUD_NAMESPACE_END
|