hvirtual/cinelerra/resample.h

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#ifndef RESAMPLE_H
#define RESAMPLE_H

#define BPC 160
#define BLACKSIZE 25

#include "file.inc"

class Resample
{
public:
        Resample(File *file, int channels);
        ~Resample();

// Reset after seeking
        void reset(int channel = -1);
        double blackman(int i, double offset, double fcn, int l);
// Query output temp
        int get_output_size(int channel);
        void read_output(double *output, int channel, int size);
// Resamples input and dumps it to output_temp
        void resample_chunk(double *input,
                long in_len,
                int in_rate,
                int out_rate,
                int channel);
// Resample from the file handler and store in *output.
// Returns the total samples read from the file handler.
        int resample(double *output, 
                long out_len,
                int in_rate,
                int out_rate,
                int channel,
                long in_position,      // Starting sample in input samplerate
                long out_position);      // Starting sample in output samplerate
        virtual void read_chunk(double *input, 
                long len, 
                int &reseek, 
                int iteration);   // True once for every resample call

// History buffer for resampling.
        double **old;
        double *itime;



// Unaligned resampled output
        double **output_temp;


// Total samples in unaligned output
// Tied to each channel independantly
        long *output_size;


// Sample start of output_temp in the resampled domain.
        long *output_temp_start;
// Allocation of unaligned output
        long output_allocation;
// input chunk
        double *input;
// Sample end of input chunks in the input domain.
        long *input_chunk_end;
        long input_size;
        int channels;
        int *resample_init;
// Last sample ratio configured to
        double last_ratio;
        double blackfilt[2 * BPC + 1][BLACKSIZE];
        File *file;
// Determine whether to reset after a seek
// Sample end of last buffer read for each channel
        long *last_out_end;
};

class Resample_float
{
public:
        Resample_float(File *file, int channels);
        ~Resample_float();

// Reset after seeking
        void reset(int channel = -1);
        float blackman(int i, float offset, float fcn, int l);
// Query output temp
        int get_output_size(int channel);
        void read_output(double *output, int channel, int size);
// Resamples input and dumps it to output_temp
        void resample_chunk(float *input,
                long in_len,
                int in_rate,
                int out_rate,
                int channel);
// Resample from the file handler and store in *output.
// Returns the total samples read from the file handler.
        int resample(double *output, 
                long out_len,
                int in_rate,
                int out_rate,
                int channel,
                long in_position,      // Starting sample in input samplerate
                long out_position);      // Starting sample in output samplerate
        virtual void read_chunk(float *input, 
                long len, 
                int &reseek, 
                int iteration);   // True once for every resample call

// History buffer for resampling.
        float **old;
        float *itime;



// Unaligned resampled output
        double **output_temp;


// Total samples in unaligned output
// Tied to each channel independantly
        long *output_size;


// Sample start of output_temp in the resampled domain.
        long *output_temp_start;
// Allocation of unaligned output
        long output_allocation;
// input chunk
        float *input;
// Sample end of input chunks in the input domain.
        long *input_chunk_end;
        long input_size;
        int channels;
        int *resample_init;
// Last sample ratio configured to
        float last_ratio;
        float blackfilt[2 * BPC + 1][BLACKSIZE];
        File *file;
// Determine whether to reset after a seek
// Sample end of last buffer read for each channel
        long *last_out_end;
};

#endif

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