/usr/include/libopenshot/AudioReaderSource.h is in libopenshot-dev 0.1.9+dfsg1-3build1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 | /**
* @file
* @brief Header file for AudioReaderSource class
* @author Jonathan Thomas <jonathan@openshot.org>
*
* @section LICENSE
*
* Copyright (c) 2008-2014 OpenShot Studios, LLC
* <http://www.openshotstudios.com/>. This file is part of
* OpenShot Library (libopenshot), an open-source project dedicated to
* delivering high quality video editing and animation solutions to the
* world. For more information visit <http://www.openshot.org/>.
*
* OpenShot Library (libopenshot) is free software: you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* OpenShot Library (libopenshot) 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef OPENSHOT_AUDIOREADERSOURCE_H
#define OPENSHOT_AUDIOREADERSOURCE_H
/// Do not include the juce unittest headers, because it collides with unittest++
#define __JUCE_UNITTEST_JUCEHEADER__
#ifndef _NDEBUG
/// Define NO debug for JUCE on mac os
#define _NDEBUG
#endif
#include <iomanip>
#include "JuceLibraryCode/JuceHeader.h"
#include "ReaderBase.h"
using namespace std;
/// This namespace is the default namespace for all code in the openshot library
namespace openshot
{
/**
* @brief This class is used to expose any ReaderBase derived class as an AudioSource in JUCE.
*
* This allows any reader to play audio through JUCE (our audio framework).
*/
class AudioReaderSource : public PositionableAudioSource
{
private:
int position; /// The position of the audio source (index of buffer)
bool repeat; /// Repeat the audio source when finished
int size; /// The size of the internal buffer
AudioSampleBuffer *buffer; /// The audio sample buffer
int speed; /// The speed and direction to playback a reader (1=normal, 2=fast, 3=faster, -1=rewind, etc...)
ReaderBase *reader; /// The reader to pull samples from
int64_t original_frame_number; /// The current frame to read from
int64_t frame_number; /// The current frame number
std::shared_ptr<Frame> frame; /// The current frame object that is being read
int64_t frame_position; /// The position of the current frame's buffer
double estimated_frame; /// The estimated frame position of the currently playing buffer
int estimated_samples_per_frame; /// The estimated samples per frame of video
/// Get more samples from the reader
void GetMoreSamplesFromReader();
/// Reverse an audio buffer (for backwards audio)
juce::AudioSampleBuffer* reverse_buffer(juce::AudioSampleBuffer* buffer);
public:
/// @brief Constructor that reads samples from a reader
/// @param audio_reader This reader provides constant samples from a ReaderBase derived class
/// @param starting_frame_number This is the frame number to start reading samples from the reader.
/// @param buffer_size The max number of samples to keep in the buffer at one time.
AudioReaderSource(ReaderBase *audio_reader, int64_t starting_frame_number, int buffer_size);
/// Destructor
~AudioReaderSource();
/// @brief Get the next block of audio samples
/// @param info This struct informs us of which samples are needed next.
void getNextAudioBlock (const AudioSourceChannelInfo& info);
/// Prepare to play this audio source
void prepareToPlay(int, double);
/// Release all resources
void releaseResources();
/// @brief Set the next read position of this source
/// @param newPosition The sample # to start reading from
void setNextReadPosition (int64 newPosition);
/// Get the next read position of this source
int64 getNextReadPosition() const;
/// Get the total length (in samples) of this audio source
int64 getTotalLength() const;
/// Determines if this audio source should repeat when it reaches the end
bool isLooping() const;
/// @brief Set if this audio source should repeat when it reaches the end
/// @param shouldLoop Determines if the audio source should repeat when it reaches the end
void setLooping (bool shouldLoop);
/// Update the internal buffer used by this source
void setBuffer (AudioSampleBuffer *audio_buffer);
const ReaderInfo & getReaderInfo() const { return reader->info; }
/// Return the current frame object
std::shared_ptr<Frame> getFrame() const { return frame; }
/// Get the estimate frame that is playing at this moment
int64_t getEstimatedFrame() const { return int64_t(estimated_frame); }
/// Set Speed (The speed and direction to playback a reader (1=normal, 2=fast, 3=faster, -1=rewind, etc...)
void setSpeed(int new_speed) { speed = new_speed; }
/// Get Speed (The speed and direction to playback a reader (1=normal, 2=fast, 3=faster, -1=rewind, etc...)
int getSpeed() const { return speed; }
/// Set Reader
void Reader(ReaderBase *audio_reader) { reader = audio_reader; }
/// Get Reader
ReaderBase* Reader() const { return reader; }
/// Seek to a specific frame
void Seek(int64_t new_position) { frame_number = new_position; estimated_frame = new_position; }
};
}
#endif
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