2 * This file is part of FFmpeg.
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.
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.
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
34 #include "libavformat/avformat.h"
35 #include "libavformat/avio.h"
37 #include "libavcodec/avcodec.h"
39 #include "libavfilter/avfilter.h"
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"
48 #include "libswresample/swresample.h"
51 #define VSYNC_PASSTHROUGH 0
54 #define VSYNC_VSCFR 0xfe
55 #define VSYNC_DROP 0xff
57 #define MAX_STREAMS 1024 /* arbitrary sanity check value */
59 /* select an input stream for an output stream */
60 typedef struct StreamMap {
61 int disabled; /* 1 is this mapping is disabled by a negative map */
65 int sync_stream_index;
66 char *linklabel; /* name of an output link, for mapping lavfi outputs */
70 int file_idx, stream_idx, channel_idx; // input
71 int ofile_idx, ostream_idx; // output
74 typedef struct OptionsContext {
77 /* input/output options */
81 SpecifierOpt *codec_names;
83 SpecifierOpt *audio_channels;
84 int nb_audio_channels;
85 SpecifierOpt *audio_sample_rate;
86 int nb_audio_sample_rate;
87 SpecifierOpt *frame_rates;
89 SpecifierOpt *frame_sizes;
91 SpecifierOpt *frame_pix_fmts;
92 int nb_frame_pix_fmts;
95 int64_t input_ts_offset;
99 SpecifierOpt *ts_scale;
101 SpecifierOpt *dump_attachment;
102 int nb_dump_attachment;
105 StreamMap *stream_maps;
107 AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */
108 int nb_audio_channel_maps; /* number of (valid) -map_channel settings */
109 int metadata_global_manual;
110 int metadata_streams_manual;
111 int metadata_chapters_manual;
112 const char **attachments;
115 int chapters_input_file;
117 int64_t recording_time;
119 uint64_t limit_filesize;
126 int subtitle_disable;
129 /* indexed by output file stream index */
133 SpecifierOpt *metadata;
135 SpecifierOpt *max_frames;
137 SpecifierOpt *bitstream_filters;
138 int nb_bitstream_filters;
139 SpecifierOpt *codec_tags;
141 SpecifierOpt *sample_fmts;
143 SpecifierOpt *qscale;
145 SpecifierOpt *forced_key_frames;
146 int nb_forced_key_frames;
147 SpecifierOpt *force_fps;
149 SpecifierOpt *frame_aspect_ratios;
150 int nb_frame_aspect_ratios;
151 SpecifierOpt *rc_overrides;
153 SpecifierOpt *intra_matrices;
154 int nb_intra_matrices;
155 SpecifierOpt *inter_matrices;
156 int nb_inter_matrices;
157 SpecifierOpt *top_field_first;
158 int nb_top_field_first;
159 SpecifierOpt *metadata_map;
161 SpecifierOpt *presets;
163 SpecifierOpt *copy_initial_nonkeyframes;
164 int nb_copy_initial_nonkeyframes;
165 SpecifierOpt *copy_prior_start;
166 int nb_copy_prior_start;
167 SpecifierOpt *filters;
169 SpecifierOpt *filter_scripts;
170 int nb_filter_scripts;
171 SpecifierOpt *reinit_filters;
172 int nb_reinit_filters;
173 SpecifierOpt *fix_sub_duration;
174 int nb_fix_sub_duration;
175 SpecifierOpt *canvas_sizes;
179 SpecifierOpt *passlogfiles;
181 SpecifierOpt *guess_layout_max;
182 int nb_guess_layout_max;
187 typedef struct InputFilter {
188 AVFilterContext *filter;
189 struct InputStream *ist;
190 struct FilterGraph *graph;
194 typedef struct OutputFilter {
195 AVFilterContext *filter;
196 struct OutputStream *ost;
197 struct FilterGraph *graph;
200 /* temporary storage until stream maps are processed */
201 AVFilterInOut *out_tmp;
204 typedef struct FilterGraph {
206 const char *graph_desc;
208 AVFilterGraph *graph;
211 InputFilter **inputs;
213 OutputFilter **outputs;
217 typedef struct InputStream {
220 int discard; /* true if stream data should be discarded */
221 int decoding_needed; /* true if the packets must be decoded in 'raw_fifo' */
223 AVFrame *decoded_frame;
224 AVFrame *filter_frame; /* a ref of decoded_frame, to be sent to filters */
226 int64_t start; /* time when read started */
227 /* predicted dts of the next packet read for this stream or (when there are
228 * several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */
230 int64_t dts; ///< dts of the last packet read for this stream (in AV_TIME_BASE units)
232 int64_t next_pts; ///< synthetic pts for the next decode frame (in AV_TIME_BASE units)
233 int64_t pts; ///< current pts of the decoded frame (in AV_TIME_BASE units)
234 int wrap_correction_done;
236 int64_t filter_in_rescale_delta_last;
239 int is_start; /* is 1 at the start and after a discontinuity */
241 int showed_multi_packet_warning;
243 AVRational framerate; /* framerate forced with -r */
245 int guess_layout_max;
249 int resample_pix_fmt;
251 int resample_sample_fmt;
252 int resample_sample_rate;
253 int resample_channels;
254 uint64_t resample_channel_layout;
256 int fix_sub_duration;
257 struct { /* previous decoded subtitle and related variables */
272 /* decoded data from this stream goes into all those filters
273 * currently video and audio only */
274 InputFilter **filters;
280 typedef struct InputFile {
281 AVFormatContext *ctx;
282 int eof_reached; /* true if eof reached */
283 int eagain; /* true if last read attempt returned EAGAIN */
284 int ist_index; /* index of first stream in input_streams */
285 int64_t input_ts_offset;
288 int64_t start_time; /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
289 int64_t recording_time;
290 int nb_streams; /* number of stream that ffmpeg is aware of; may be different
291 from ctx.nb_streams if new streams appear during av_read_frame() */
292 int nb_streams_warn; /* number of streams that the user was warned of */
297 pthread_t thread; /* thread reading from this file */
298 int finished; /* the thread has exited */
299 int joined; /* the thread has been joined */
300 pthread_mutex_t fifo_lock; /* lock for access to fifo */
301 pthread_cond_t fifo_cond; /* the main thread will signal on this cond after reading from fifo */
302 AVFifoBuffer *fifo; /* demuxed packets are stored here; freed by the main thread */
306 enum forced_keyframes_const {
315 extern const char *const forced_keyframes_const_names[];
317 typedef struct OutputStream {
318 int file_index; /* file index */
319 int index; /* stream index in the output file */
320 int source_index; /* InputStream index */
321 AVStream *st; /* stream in the output file */
322 int encoding_needed; /* true if encoding needed for this stream */
324 /* input pts and corresponding output pts
326 struct InputStream *sync_ist; /* input stream to sync against */
327 int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
328 /* pts of the first frame encoded for this stream, used for limiting
331 /* dts of the last packet sent to the muxer */
332 int64_t last_mux_dts;
333 AVBitStreamFilterContext *bitstream_filters;
336 AVFrame *filtered_frame;
339 AVRational frame_rate;
343 AVRational frame_aspect_ratio;
345 /* forced key frames */
346 int64_t *forced_kf_pts;
349 char *forced_keyframes;
350 AVExpr *forced_keyframes_pexpr;
351 double forced_keyframes_expr_const_values[FKF_NB];
354 int audio_channels_map[SWR_CH_MAX]; /* list of the channels id to pick from the source stream */
355 int audio_channels_mapped; /* number of channels in audio_channels_map */
357 char *logfile_prefix;
360 OutputFilter *filter;
362 char *filters; ///< filtergraph associated to the -filter option
363 char *filters_script; ///< filtergraph script associated to the -filter_script option
367 AVDictionary *swr_opts;
368 AVDictionary *resample_opts;
370 int finished; /* no more packets should be written for this stream */
371 int unavailable; /* true if the steram is unavailable (possibly temporarily) */
373 const char *attachment_filename;
374 int copy_initial_nonkeyframes;
375 int copy_prior_start;
379 AVCodecParserContext *parser;
382 typedef struct OutputFile {
383 AVFormatContext *ctx;
385 int ost_index; /* index of the first stream in output_streams */
386 int64_t recording_time; ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
387 int64_t start_time; ///< start time in microseconds == AV_TIME_BASE units
388 uint64_t limit_filesize; /* filesize limit expressed in bytes */
393 extern InputStream **input_streams;
394 extern int nb_input_streams;
395 extern InputFile **input_files;
396 extern int nb_input_files;
398 extern OutputStream **output_streams;
399 extern int nb_output_streams;
400 extern OutputFile **output_files;
401 extern int nb_output_files;
403 extern FilterGraph **filtergraphs;
404 extern int nb_filtergraphs;
406 extern char *vstats_filename;
408 extern float audio_drift_threshold;
409 extern float dts_delta_threshold;
410 extern float dts_error_threshold;
412 extern int audio_volume;
413 extern int audio_sync_method;
414 extern int video_sync_method;
415 extern int do_benchmark;
416 extern int do_benchmark_all;
417 extern int do_deinterlace;
418 extern int do_hex_dump;
419 extern int do_pkt_dump;
423 extern int exit_on_error;
424 extern int print_stats;
426 extern int stdin_interaction;
427 extern int frame_bits_per_raw_sample;
428 extern AVIOContext *progress_avio;
429 extern float max_error_rate;
431 extern const AVIOInterruptCB int_cb;
433 extern const OptionDef options[];
435 void term_init(void);
436 void term_exit(void);
438 void reset_options(OptionsContext *o, int is_input);
439 void show_usage(void);
441 void opt_output_file(void *optctx, const char *filename);
443 void assert_avoptions(AVDictionary *m);
445 int guess_input_channel_layout(InputStream *ist);
447 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodec *codec, enum AVPixelFormat target);
448 void choose_sample_fmt(AVStream *st, AVCodec *codec);
450 int configure_filtergraph(FilterGraph *fg);
451 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
452 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
453 FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost);
455 int ffmpeg_parse_options(int argc, char **argv);
457 #endif /* FFMPEG_H */