hvirtual/cinelerra/filebase.h

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#ifndef FILEBASE_H
#define FILEBASE_H

#include "asset.inc"
#include "assets.inc"
#include "colormodels.h"
#include "edit.inc"
#include "guicast.h"
#include "file.inc"
#include "filelist.inc"
#include "overlayframe.inc"
#include "strategies.inc"
#include "vframe.inc"

#include <sys/types.h>

// inherited by every file interpreter
class FileBase
{
public:
        FileBase(Asset *asset, File *file);
        virtual ~FileBase();


        friend class File;
        friend class FileList;
        friend class FrameWriter;




        int get_mode(char *mode, int rd, int wr);
        int reset_parameters();



        virtual void get_parameters(BC_WindowBase *parent_window, 
                        Asset *asset, 
                        BC_WindowBase **format_window,
                        int audio_options,
                        int video_options,
                        int lock_compressor) {};



        virtual int get_index(char *index_path) { return 1; };
        virtual int check_header() { return 0; };  // Test file to see if it is of this type.
        virtual int reset_parameters_derived() {};
        virtual int read_header() {};     // WAV files for getting header
        virtual int open_file(int rd, int wr) {};
        virtual int close_file();
        virtual int close_file_derived() {};
        int set_dither();
        virtual int seek_end() { return 0; };
        virtual int seek_start() { return 0; };
        virtual int64_t get_video_position() { return 0; };
        virtual int64_t get_audio_position() { return 0; };
        virtual int set_video_position(int64_t x) { return 0; };
        virtual int set_audio_position(int64_t x) { return 0; };

// Subclass should call this to add the base class allocation.
// Only used in read mode.
        virtual int64_t get_memory_usage() { return 0; };

        virtual int write_samples(double **buffer, 
                int64_t len) { return 0; };
        virtual int write_frames(VFrame ***frames, int len) { return 0; };
        virtual int read_compressed_frame(VFrame *buffer) { return 0; };
        virtual int write_compressed_frame(VFrame *buffers) { return 0; };
        virtual int64_t compressed_frame_size() { return 0; };
// Doubles are used to allow resampling
        virtual int read_samples(double *buffer, int64_t len) { return 0; };


        virtual int prefer_samples_float() {return 0;};
        virtual int read_samples_float(float *buffer, int64_t len) { return 0; };

        virtual int read_frame(VFrame *frame) { return 1; };

// Return either the argument or another colormodel which read_frame should
// use.
        virtual int colormodel_supported(int colormodel) { return BC_RGB888; };
// This file can copy compressed frames directly from the asset
        virtual int can_copy_from(Edit *edit, int64_t position) { return 0; }; 
        virtual int get_render_strategy(ArrayList<int>* render_strategies) { return VRENDER_VPIXEL; };

protected:
// Return 1 if the render_strategy is present on the list.
        static int search_render_strategies(ArrayList<int>* render_strategies, int render_strategy);

// convert samples into file format
        int64_t samples_to_raw(char *out_buffer, 
                                                        float **in_buffer, // was **buffer
                                                        int64_t input_len, 
                                                        int bits, 
                                                        int channels,
                                                        int byte_order,
                                                        int signed_);

// overwrites the buffer from PCM data depending on feather.
        int raw_to_samples(float *out_buffer, char *in_buffer, 
                int64_t samples, int bits, int channels, int channel, int feather, 
                float lfeather_len, float lfeather_gain, float lfeather_slope);

// Overwrite the buffer from float data using feather.
        int overlay_float_buffer(float *out_buffer, float *in_buffer, 
                int64_t samples, 
                float lfeather_len, float lfeather_gain, float lfeather_slope);

// convert a frame to and from file format

        int64_t frame_to_raw(unsigned char *out_buffer,
                                        VFrame *in_frame,
                                        int w,
                                        int h,
                                        int use_alpha,
                                        int use_float,
                                        int color_model);

// allocate a buffer for translating int to float
        int get_audio_buffer(char **buffer, int64_t len, int64_t bits, int64_t channels); // audio

// Allocate a buffer for feathering floats
        int get_float_buffer(float **buffer, int64_t len);

// allocate a buffer for translating video to VFrame
        int get_video_buffer(unsigned char **buffer, int depth); // video
        int get_row_pointers(unsigned char *buffer, unsigned char ***pointers, int depth);
        static int match4(char *in, char *out);   // match 4 bytes for a quicktime type

        int64_t ima4_samples_to_bytes(int64_t samples, int channels);
        int64_t ima4_bytes_to_samples(int64_t bytes, int channels);

        char *audio_buffer_in, *audio_buffer_out;    // for raw audio reads and writes
        float *float_buffer;          // for floating point feathering
        unsigned char *video_buffer_in, *video_buffer_out;
        unsigned char **row_pointers_in, **row_pointers_out;
        int64_t prev_buffer_position;  // for audio determines if reading raw data is necessary
        int64_t prev_frame_position;   // for video determines if reading raw video data is necessary
        int64_t prev_bytes; // determines if new raw buffer is needed and used for getting memory usage
        int64_t prev_len;
        int prev_track;
        int prev_layer;
        Asset *asset;
        int wr, rd;
        int dither;
        int internal_byte_order;
        File *file;

private:



// ================================= Audio compression
// ULAW
        float ulawtofloat(char ulaw);
        char floattoulaw(float value);
        int generate_ulaw_tables();
        int delete_ulaw_tables();
        float *ulawtofloat_table, *ulawtofloat_ptr;
        unsigned char *floattoulaw_table, *floattoulaw_ptr;

// IMA4
        int init_ima4();
        int delete_ima4();
        int ima4_decode_block(int16_t *output, unsigned char *input);
        int ima4_decode_sample(int *predictor, int nibble, int *index, int *step);
        int ima4_encode_block(unsigned char *output, int16_t *input, int step, int channel);
        int ima4_encode_sample(int *last_sample, int *last_index, int *nibble, int next_sample);

        static int ima4_step[89];
        static int ima4_index[16];
        int *last_ima4_samples;
        int *last_ima4_indexes;
        int ima4_block_size;
        int ima4_block_samples;
        OverlayFrame *overlayer;
};

#endif

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