4 * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 #include "bccmodels.h"
33 #include "filelist.inc"
34 #include "indexfile.inc"
35 #include "mainprogress.inc"
36 #include "overlayframe.inc"
37 #include "strategies.inc"
40 #include <sys/types.h>
42 // Number of samples saved before the current read position
43 #define HISTORY_MAX 0x10000
45 // inherited by every file interpreter
49 FileBase(Asset *asset, File *file);
55 friend class FileList;
56 friend class FrameWriter;
58 void get_mode(char *mode, int rd, int wr);
59 void reset_parameters();
61 virtual int get_index(IndexFile *index_file, MainProgressBar *progress_bar) { return -1; }
62 virtual int check_header() { return 0; } // Test file to see if it is of this type.
63 virtual int reset_parameters_derived() { return 0; }
64 virtual int read_header() { return 1; } // WAV files for getting header
65 virtual int get_best_colormodel(int driver, int vstream);
67 virtual int open_file(int rd, int wr) { return 1; }
68 virtual int close_file();
69 virtual int close_file_derived() { return 0; }
71 virtual int seek_end() { return 0; }
72 virtual int seek_start() { return 0; }
73 virtual int64_t get_video_position() { return 0; }
74 virtual int64_t get_audio_position() { return 0; }
75 virtual int set_video_position(int64_t x) { return 0; }
76 virtual int set_audio_position(int64_t x) { return 0; }
77 virtual int set_subtitle(int value) { return -1; }
78 virtual int select_video_stream(Asset *asset, int vstream) { return -1; }
79 virtual int select_audio_stream(Asset *asset, int astream) { return -1; }
80 virtual int set_program(int no) { return -1; }
81 virtual int get_cell_time(int no, double &time) { time = -1.; return 1; }
82 virtual int get_system_time(int64_t &tm) { tm = -1; return 1; }
83 virtual int get_audio_for_video(int vstream, int astream, int64_t &channel_mask) {
84 channel_mask = 0; return -1;
86 virtual int get_video_pid(int track) { return -1; }
87 virtual int get_video_info(int track, int &pid, double &framerate,
88 int &width, int &height, char *title=0) { return -1; }
90 virtual int get_thumbnail(int stream, int64_t &position,
91 unsigned char *&thumbnail, int &ww, int &hh) { return -1; }
92 virtual int set_skimming(int track, int skim, skim_fn fn, void *vp) { return -1; }
93 virtual int skim_video(int track, void *vp, skim_fn fn) { return -1; }
95 // Subclass should call this to add the base class allocation.
96 // Only used in read mode.
97 virtual int64_t base_memory_usage();
99 virtual int write_samples(double **buffer,
100 int64_t len) { return 0; }
101 virtual int write_frames(VFrame ***frames, int len) { return 0; }
102 virtual int read_compressed_frame(VFrame *buffer) { return 0; }
103 virtual int write_compressed_frame(VFrame *buffers) { return 0; }
104 virtual int64_t compressed_frame_size() { return 0; }
105 // Doubles are used to allow resampling
106 virtual int read_samples(double *buffer, int64_t len) { return 0; }
107 virtual int read_frame(VFrame *frame) { return 1; }
108 // get dvb record stream file descriptor
109 virtual int record_fd() { return -1; }
111 virtual int prefer_samples_float() { return 0; }
112 virtual int read_samples_float(float *buffer, int64_t len) { return 0; }
114 // Return either the argument or another colormodel which read_frame should
116 virtual int colormodel_supported(int colormodel) { return BC_RGB888; }
117 // This file can copy compressed frames directly from the asset
118 virtual int can_copy_from(Asset *asset, int64_t position) { return 0; }
119 virtual int can_scale_input() { return 0; }
120 virtual int get_render_strategy(ArrayList<int>* render_strategies) { return VRENDER_VPIXEL; }
122 // Manages an audio history buffer
123 void update_pcm_history(int64_t len);
124 // Returns history_start + history_size
125 int64_t get_history_sample();
127 void append_history(float **new_data, int len);
129 void append_history(short *new_data, int len);
130 void read_history(double *dst,
131 int64_t start_sample,
134 void allocate_history(int len);
135 // thie function will be used to verify if all files in a given
136 // list are of same size or not. Each list type object should
137 // override this method with its own definition.
138 virtual int verify_file_list() { return 1; }
140 // For static functions to access it
145 // Return 1 if the render_strategy is present on the list.
146 static int search_render_strategies(ArrayList<int>* render_strategies, int render_strategy);
148 // convert samples into file format
149 int64_t samples_to_raw(char *out_buffer,
150 float **in_buffer, // was **buffer
157 // overwrites the buffer from PCM data depending on feather.
158 int raw_to_samples(float *out_buffer, char *in_buffer,
159 int64_t samples, int bits, int channels, int channel, int feather,
160 float lfeather_len, float lfeather_gain, float lfeather_slope);
162 // Overwrite the buffer from float data using feather.
163 int overlay_float_buffer(float *out_buffer, float *in_buffer,
165 float lfeather_len, float lfeather_gain, float lfeather_slope);
167 // convert a frame to and from file format
169 int64_t frame_to_raw(unsigned char *out_buffer,
177 // allocate a buffer for translating int to float
178 int get_audio_buffer(char **buffer, int64_t len, int64_t bits, int64_t channels); // audio
180 // Allocate a buffer for feathering floats
181 int get_float_buffer(float **buffer, int64_t len);
183 // allocate a buffer for translating video to VFrame
184 int get_video_buffer(unsigned char **buffer, int depth); // video
185 int get_row_pointers(unsigned char *buffer, unsigned char ***pointers, int depth);
186 static int match4(const char *in, const char *out); // match 4 bytes for a fourcc type
188 float *float_buffer; // for floating point feathering
189 unsigned char **row_pointers_in, **row_pointers_out;
190 int64_t prev_buffer_position; // for audio determines if reading raw data is necessary
191 int64_t prev_frame_position; // for video determines if reading raw video data is necessary
192 int64_t prev_bytes; // determines if new raw buffer is needed and used for getting memory usage
197 int internal_byte_order;
200 // ================================= Audio compression
201 double **pcm_history;
202 int64_t history_allocated;
203 int64_t history_size;
204 int64_t history_start;
205 int history_channels;
206 // Range to decode to fill history buffer. Maintained by FileBase.
207 int64_t decode_start;
209 // End of last decoded sample. Maintained by user for seeking.
214 float ulawtofloat(char ulaw);
215 char floattoulaw(float value);
216 int generate_ulaw_tables();
217 int delete_ulaw_tables();
218 float *ulawtofloat_table, *ulawtofloat_ptr;
219 unsigned char *floattoulaw_table, *floattoulaw_ptr;