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1/*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19#ifndef FFMPEG_H
20#define FFMPEG_H
21
22#include "config.h"
23
24#include <stdint.h>
25#include <stdio.h>
26#include <signal.h>
27
28#if HAVE_PTHREADS
29#include <pthread.h>
30#endif
31
32#include "cmdutils.h"
33
34#include "libavformat/avformat.h"
35#include "libavformat/avio.h"
36
37#include "libavcodec/avcodec.h"
38
39#include "libavfilter/avfilter.h"
40
41#include "libavutil/avutil.h"
42#include "libavutil/dict.h"
43#include "libavutil/eval.h"
44#include "libavutil/fifo.h"
45#include "libavutil/pixfmt.h"
46#include "libavutil/rational.h"
47
48#include "libswresample/swresample.h"
49
50#define VSYNC_AUTO -1
51#define VSYNC_PASSTHROUGH 0
52#define VSYNC_CFR 1
53#define VSYNC_VFR 2
54#define VSYNC_DROP 0xff
55
56#define MAX_STREAMS 1024 /* arbitrary sanity check value */
57
58/* select an input stream for an output stream */
59typedef struct StreamMap {
60 int disabled; /* 1 is this mapping is disabled by a negative map */
61 int file_index;
62 int stream_index;
63 int sync_file_index;
64 int sync_stream_index;
65 char *linklabel; /* name of an output link, for mapping lavfi outputs */
66} StreamMap;
67
68typedef struct {
69 int file_idx, stream_idx, channel_idx; // input
70 int ofile_idx, ostream_idx; // output
71} AudioChannelMap;
72
73typedef struct OptionsContext {
74 OptionGroup *g;
75
76 /* input/output options */
77 int64_t start_time;
78 const char *format;
79
80 SpecifierOpt *codec_names;
81 int nb_codec_names;
82 SpecifierOpt *audio_channels;
83 int nb_audio_channels;
84 SpecifierOpt *audio_sample_rate;
85 int nb_audio_sample_rate;
86 SpecifierOpt *frame_rates;
87 int nb_frame_rates;
88 SpecifierOpt *frame_sizes;
89 int nb_frame_sizes;
90 SpecifierOpt *frame_pix_fmts;
91 int nb_frame_pix_fmts;
92
93 /* input options */
94 int64_t input_ts_offset;
95 int rate_emu;
96 int accurate_seek;
97
98 SpecifierOpt *ts_scale;
99 int nb_ts_scale;
100 SpecifierOpt *dump_attachment;
101 int nb_dump_attachment;
102
103 /* output options */
104 StreamMap *stream_maps;
105 int nb_stream_maps;
106 AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */
107 int nb_audio_channel_maps; /* number of (valid) -map_channel settings */
108 int metadata_global_manual;
109 int metadata_streams_manual;
110 int metadata_chapters_manual;
111 const char **attachments;
112 int nb_attachments;
113
114 int chapters_input_file;
115
116 int64_t recording_time;
117 int64_t stop_time;
118 uint64_t limit_filesize;
119 float mux_preload;
120 float mux_max_delay;
121 int shortest;
122
123 int video_disable;
124 int audio_disable;
125 int subtitle_disable;
126 int data_disable;
127
128 /* indexed by output file stream index */
129 int *streamid_map;
130 int nb_streamid_map;
131
132 SpecifierOpt *metadata;
133 int nb_metadata;
134 SpecifierOpt *max_frames;
135 int nb_max_frames;
136 SpecifierOpt *bitstream_filters;
137 int nb_bitstream_filters;
138 SpecifierOpt *codec_tags;
139 int nb_codec_tags;
140 SpecifierOpt *sample_fmts;
141 int nb_sample_fmts;
142 SpecifierOpt *qscale;
143 int nb_qscale;
144 SpecifierOpt *forced_key_frames;
145 int nb_forced_key_frames;
146 SpecifierOpt *force_fps;
147 int nb_force_fps;
148 SpecifierOpt *frame_aspect_ratios;
149 int nb_frame_aspect_ratios;
150 SpecifierOpt *rc_overrides;
151 int nb_rc_overrides;
152 SpecifierOpt *intra_matrices;
153 int nb_intra_matrices;
154 SpecifierOpt *inter_matrices;
155 int nb_inter_matrices;
156 SpecifierOpt *top_field_first;
157 int nb_top_field_first;
158 SpecifierOpt *metadata_map;
159 int nb_metadata_map;
160 SpecifierOpt *presets;
161 int nb_presets;
162 SpecifierOpt *copy_initial_nonkeyframes;
163 int nb_copy_initial_nonkeyframes;
164 SpecifierOpt *copy_prior_start;
165 int nb_copy_prior_start;
166 SpecifierOpt *filters;
167 int nb_filters;
168 SpecifierOpt *filter_scripts;
169 int nb_filter_scripts;
170 SpecifierOpt *reinit_filters;
171 int nb_reinit_filters;
172 SpecifierOpt *fix_sub_duration;
173 int nb_fix_sub_duration;
174 SpecifierOpt *canvas_sizes;
175 int nb_canvas_sizes;
176 SpecifierOpt *pass;
177 int nb_pass;
178 SpecifierOpt *passlogfiles;
179 int nb_passlogfiles;
180 SpecifierOpt *guess_layout_max;
181 int nb_guess_layout_max;
182 SpecifierOpt *apad;
183 int nb_apad;
184} OptionsContext;
185
186typedef struct InputFilter {
187 AVFilterContext *filter;
188 struct InputStream *ist;
189 struct FilterGraph *graph;
190 uint8_t *name;
191} InputFilter;
192
193typedef struct OutputFilter {
194 AVFilterContext *filter;
195 struct OutputStream *ost;
196 struct FilterGraph *graph;
197 uint8_t *name;
198
199 /* temporary storage until stream maps are processed */
200 AVFilterInOut *out_tmp;
201} OutputFilter;
202
203typedef struct FilterGraph {
204 int index;
205 const char *graph_desc;
206
207 AVFilterGraph *graph;
208 int reconfiguration;
209
210 InputFilter **inputs;
211 int nb_inputs;
212 OutputFilter **outputs;
213 int nb_outputs;
214} FilterGraph;
215
216typedef struct InputStream {
217 int file_index;
218 AVStream *st;
219 int discard; /* true if stream data should be discarded */
220 int decoding_needed; /* true if the packets must be decoded in 'raw_fifo' */
221 AVCodec *dec;
222 AVFrame *decoded_frame;
223 AVFrame *filter_frame; /* a ref of decoded_frame, to be sent to filters */
224
225 int64_t start; /* time when read started */
226 /* predicted dts of the next packet read for this stream or (when there are
227 * several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */
228 int64_t next_dts;
229 int64_t dts; ///< dts of the last packet read for this stream (in AV_TIME_BASE units)
230
231 int64_t next_pts; ///< synthetic pts for the next decode frame (in AV_TIME_BASE units)
232 int64_t pts; ///< current pts of the decoded frame (in AV_TIME_BASE units)
233 int wrap_correction_done;
234
235 int64_t filter_in_rescale_delta_last;
236
237 double ts_scale;
238 int is_start; /* is 1 at the start and after a discontinuity */
239 int saw_first_ts;
240 int showed_multi_packet_warning;
241 AVDictionary *opts;
242 AVRational framerate; /* framerate forced with -r */
243 int top_field_first;
244 int guess_layout_max;
245
246 int resample_height;
247 int resample_width;
248 int resample_pix_fmt;
249
250 int resample_sample_fmt;
251 int resample_sample_rate;
252 int resample_channels;
253 uint64_t resample_channel_layout;
254
255 int fix_sub_duration;
256 struct { /* previous decoded subtitle and related variables */
257 int got_output;
258 int ret;
259 AVSubtitle subtitle;
260 } prev_sub;
261
262 struct sub2video {
263 int64_t last_pts;
264 int64_t end_pts;
265 AVFrame *frame;
266 int w, h;
267 } sub2video;
268
269 int dr1;
270
271 /* decoded data from this stream goes into all those filters
272 * currently video and audio only */
273 InputFilter **filters;
274 int nb_filters;
275
276 int reinit_filters;
277} InputStream;
278
279typedef struct InputFile {
280 AVFormatContext *ctx;
281 int eof_reached; /* true if eof reached */
282 int eagain; /* true if last read attempt returned EAGAIN */
283 int ist_index; /* index of first stream in input_streams */
284 int64_t ts_offset;
285 int64_t last_ts;
286 int64_t start_time; /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
287 int64_t recording_time;
288 int nb_streams; /* number of stream that ffmpeg is aware of; may be different
289 from ctx.nb_streams if new streams appear during av_read_frame() */
290 int nb_streams_warn; /* number of streams that the user was warned of */
291 int rate_emu;
292 int accurate_seek;
293
294#if HAVE_PTHREADS
295 pthread_t thread; /* thread reading from this file */
296 int finished; /* the thread has exited */
297 int joined; /* the thread has been joined */
298 pthread_mutex_t fifo_lock; /* lock for access to fifo */
299 pthread_cond_t fifo_cond; /* the main thread will signal on this cond after reading from fifo */
300 AVFifoBuffer *fifo; /* demuxed packets are stored here; freed by the main thread */
301#endif
302} InputFile;
303
304enum forced_keyframes_const {
305 FKF_N,
306 FKF_N_FORCED,
307 FKF_PREV_FORCED_N,
308 FKF_PREV_FORCED_T,
309 FKF_T,
310 FKF_NB
311};
312
313extern const char *const forced_keyframes_const_names[];
314
315typedef struct OutputStream {
316 int file_index; /* file index */
317 int index; /* stream index in the output file */
318 int source_index; /* InputStream index */
319 AVStream *st; /* stream in the output file */
320 int encoding_needed; /* true if encoding needed for this stream */
321 int frame_number;
322 /* input pts and corresponding output pts
323 for A/V sync */
324 struct InputStream *sync_ist; /* input stream to sync against */
325 int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
326 /* pts of the first frame encoded for this stream, used for limiting
327 * recording time */
328 int64_t first_pts;
329 /* dts of the last packet sent to the muxer */
330 int64_t last_mux_dts;
331 AVBitStreamFilterContext *bitstream_filters;
332 AVCodec *enc;
333 int64_t max_frames;
334 AVFrame *filtered_frame;
335
336 /* video only */
337 AVRational frame_rate;
338 int force_fps;
339 int top_field_first;
340
341 AVRational frame_aspect_ratio;
342
343 /* forced key frames */
344 int64_t *forced_kf_pts;
345 int forced_kf_count;
346 int forced_kf_index;
347 char *forced_keyframes;
348 AVExpr *forced_keyframes_pexpr;
349 double forced_keyframes_expr_const_values[FKF_NB];
350
351 /* audio only */
352 int audio_channels_map[SWR_CH_MAX]; /* list of the channels id to pick from the source stream */
353 int audio_channels_mapped; /* number of channels in audio_channels_map */
354
355 char *logfile_prefix;
356 FILE *logfile;
357
358 OutputFilter *filter;
359 char *avfilter;
360
361 int64_t sws_flags;
362 AVDictionary *opts;
363 AVDictionary *swr_opts;
364 AVDictionary *resample_opts;
365 char *apad;
366 int finished; /* no more packets should be written for this stream */
367 int unavailable; /* true if the steram is unavailable (possibly temporarily) */
368 int stream_copy;
369 const char *attachment_filename;
370 int copy_initial_nonkeyframes;
371 int copy_prior_start;
372
373 int keep_pix_fmt;
374
375 AVCodecParserContext *parser;
376} OutputStream;
377
378typedef struct OutputFile {
379 AVFormatContext *ctx;
380 AVDictionary *opts;
381 int ost_index; /* index of the first stream in output_streams */
382 int64_t recording_time; ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
383 int64_t start_time; ///< start time in microseconds == AV_TIME_BASE units
384 uint64_t limit_filesize; /* filesize limit expressed in bytes */
385
386 int shortest;
387} OutputFile;
388
389extern InputStream **input_streams;
390extern int nb_input_streams;
391extern InputFile **input_files;
392extern int nb_input_files;
393
394extern OutputStream **output_streams;
395extern int nb_output_streams;
396extern OutputFile **output_files;
397extern int nb_output_files;
398
399extern FilterGraph **filtergraphs;
400extern int nb_filtergraphs;
401
402extern char *vstats_filename;
403
404extern float audio_drift_threshold;
405extern float dts_delta_threshold;
406extern float dts_error_threshold;
407
408extern int audio_volume;
409extern int audio_sync_method;
410extern int video_sync_method;
411extern int do_benchmark;
412extern int do_benchmark_all;
413extern int do_deinterlace;
414extern int do_hex_dump;
415extern int do_pkt_dump;
416extern int copy_ts;
417extern int copy_tb;
418extern int debug_ts;
419extern int exit_on_error;
420extern int print_stats;
421extern int qp_hist;
422extern int stdin_interaction;
423extern int frame_bits_per_raw_sample;
424extern AVIOContext *progress_avio;
425extern float max_error_rate;
426
427extern const AVIOInterruptCB int_cb;
428
429extern const OptionDef options[];
430
431void term_init(void);
432void term_exit(void);
433
434void reset_options(OptionsContext *o, int is_input);
435void show_usage(void);
436
437void opt_output_file(void *optctx, const char *filename);
438
439void assert_avoptions(AVDictionary *m);
440
441int guess_input_channel_layout(InputStream *ist);
442
443enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodec *codec, enum AVPixelFormat target);
444void choose_sample_fmt(AVStream *st, AVCodec *codec);
445
446int configure_filtergraph(FilterGraph *fg);
447int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
448int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
449FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost);
450
451int ffmpeg_parse_options(int argc, char **argv);
452
453#endif /* FFMPEG_H */
454
generated by cgit at 2024-05-17 04:44:17 (GMT)