hvirtual/cinelerra/filebase.h

   1 #ifndef FILEBASE_H
   2 #define FILEBASE_H
   3
   4 #include "asset.inc"
   5 #include "assets.inc"
   6 #include "colormodels.h"
   7 #include "edit.inc"
   8 #include "guicast.h"
   9 #include "file.inc"
  10 #include "filelist.inc"
  11 #include "overlayframe.inc"
  12 #include "strategies.inc"
  13 #include "vframe.inc"
  14
  15 #include <sys/types.h>
  16
  17 // inherited by every file interpreter
  18 class FileBase
  19 {
  20 public:
  21         FileBase(Asset *asset, File *file);
  22         virtual ~FileBase();
  23
  24
  25         friend class File;
  26         friend class FileList;
  27         friend class FrameWriter;
  28
  29
  30
  31
  32         int get_mode(char *mode, int rd, int wr);
  33         int reset_parameters();
  34
  35
  36
  37         virtual void get_parameters(BC_WindowBase *parent_window,
  38                         Asset *asset,
  39                         BC_WindowBase **format_window,
  40                         int audio_options,
  41                         int video_options,
  42                         int lock_compressor) {};
  43
  44
  45
  46         virtual int check_header() { return 0; };  // Test file to see if it is of this type.
  47         virtual int reset_parameters_derived() {};
  48         virtual int read_header() {};     // WAV files for getting header
  49         virtual int open_file(int rd, int wr) {};
  50         virtual int close_file();
  51         virtual int close_file_derived() {};
  52         int set_dither();
  53         virtual int seek_end() { return 0; };
  54         virtual int seek_start() { return 0; };
  55         virtual int64_t get_video_position() { return 0; };
  56         virtual int64_t get_audio_position() { return 0; };
  57         virtual int set_video_position(int64_t x) { return 0; };
  58         virtual int set_audio_position(int64_t x) { return 0; };
  59
  60 // Subclass should call this to add the base class allocation.
  61 // Only used in read mode.
  62         virtual int get_memory_usage() { return 0; };
  63
  64         virtual int write_samples(double **buffer,
  65                 int64_t len) { return 0; };
  66         virtual int write_frames(VFrame ***frames, int len) { return 0; };
  67         virtual int read_compressed_frame(VFrame *buffer) { return 0; };
  68         virtual int write_compressed_frame(VFrame *buffers) { return 0; };
  69         virtual int64_t compressed_frame_size() { return 0; };
  70 // Doubles are used to allow resampling
  71
  72         virtual int read_samples(double *buffer, int64_t len) { return 0; };
  73
  74
  75         virtual int prefer_samples_float() {return 0;};
  76         virtual int read_samples_float(float *buffer, int64_t len) { return 0; };
  77
  78         virtual int read_frame(VFrame *frame) { return 1; };
  79
  80 // Return either the argument or another colormodel which read_frame should
  81 // use.
  82         virtual int colormodel_supported(int colormodel) { return BC_RGB888; };
  83 // This file can copy compressed frames directly from the asset
  84         virtual int can_copy_from(Edit *edit, int64_t position) { return 0; };
  85         virtual int get_render_strategy(ArrayList<int>* render_strategies) { return VRENDER_VPIXEL; };
  86
  87 protected:
  88 // Return 1 if the render_strategy is present on the list.
  89         static int search_render_strategies(ArrayList<int>* render_strategies, int render_strategy);
  90
  91 // convert samples into file format
  92         int64_t samples_to_raw(char *out_buffer,
  93                                                         float **in_buffer, // was **buffer
  94                                                         int64_t input_len,
  95                                                         int bits,
  96                                                         int channels,
  97                                                         int byte_order,
  98                                                         int signed_);
  99
 100 // overwrites the buffer from PCM data depending on feather.
 101         int raw_to_samples(float *out_buffer, char *in_buffer,
 102                 int64_t samples, int bits, int channels, int channel, int feather,
 103                 float lfeather_len, float lfeather_gain, float lfeather_slope);
 104
 105 // Overwrite the buffer from float data using feather.
 106         int overlay_float_buffer(float *out_buffer, float *in_buffer,
 107                 int64_t samples,
 108                 float lfeather_len, float lfeather_gain, float lfeather_slope);
 109
 110 // convert a frame to and from file format
 111
 112         int64_t frame_to_raw(unsigned char *out_buffer,
 113                                         VFrame *in_frame,
 114                                         int w,
 115                                         int h,
 116                                         int use_alpha,
 117                                         int use_float,
 118                                         int color_model);
 119
 120 // allocate a buffer for translating int to float
 121         int get_audio_buffer(char **buffer, int64_t len, int64_t bits, int64_t channels); // audio
 122
 123 // Allocate a buffer for feathering floats
 124         int get_float_buffer(float **buffer, int64_t len);
 125
 126 // allocate a buffer for translating video to VFrame
 127         int get_video_buffer(unsigned char **buffer, int depth); // video
 128         int get_row_pointers(unsigned char *buffer, unsigned char ***pointers, int depth);
 129         static int match4(char *in, char *out);   // match 4 bytes for a quicktime type
 130
 131         int64_t ima4_samples_to_bytes(int64_t samples, int channels);
 132         int64_t ima4_bytes_to_samples(int64_t bytes, int channels);
 133
 134         char *audio_buffer_in, *audio_buffer_out;    // for raw audio reads and writes
 135         float *float_buffer;          // for floating point feathering
 136         unsigned char *video_buffer_in, *video_buffer_out;
 137         unsigned char **row_pointers_in, **row_pointers_out;
 138         int64_t prev_buffer_position;  // for audio determines if reading raw data is necessary
 139         int64_t prev_frame_position;   // for video determines if reading raw video data is necessary
 140         int64_t prev_bytes; // determines if new raw buffer is needed and used for getting memory usage
 141         int64_t prev_len;
 142         int prev_track;
 143         int prev_layer;
 144         Asset *asset;
 145         int wr, rd;
 146         int dither;
 147         int internal_byte_order;
 148         File *file;
 149
 150 private:
 151
 152
 153
 154 // ================================= Audio compression
 155 // ULAW
 156         float ulawtofloat(char ulaw);
 157         char floattoulaw(float value);
 158         int generate_ulaw_tables();
 159         int delete_ulaw_tables();
 160         float *ulawtofloat_table, *ulawtofloat_ptr;
 161         unsigned char *floattoulaw_table, *floattoulaw_ptr;
 162
 163 // IMA4
 164         int init_ima4();
 165         int delete_ima4();
 166         int ima4_decode_block(int16_t *output, unsigned char *input);
 167         int ima4_decode_sample(int *predictor, int nibble, int *index, int *step);
 168         int ima4_encode_block(unsigned char *output, int16_t *input, int step, int channel);
 169         int ima4_encode_sample(int *last_sample, int *last_index, int *nibble, int next_sample);
 170
 171         static int ima4_step[89];
 172         static int ima4_index[16];
 173         int *last_ima4_samples;
 174         int *last_ima4_indexes;
 175         int ima4_block_size;
 176         int ima4_block_samples;
 177         OverlayFrame *overlayer;
 178 };
 179
 180 #endif