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"
40 #include "libavfilter/avfiltergraph.h"
42 #include "libavutil/avutil.h"
43 #include "libavutil/dict.h"
44 #include "libavutil/eval.h"
45 #include "libavutil/fifo.h"
46 #include "libavutil/pixfmt.h"
47 #include "libavutil/rational.h"
49 #include "libswresample/swresample.h"
52 #define VSYNC_PASSTHROUGH 0
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;
98 SpecifierOpt *ts_scale;
100 SpecifierOpt *dump_attachment;
101 int nb_dump_attachment;
104 StreamMap *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;
114 int chapters_input_file;
116 int64_t recording_time;
118 uint64_t limit_filesize;
125 int subtitle_disable;
128 /* indexed by output file stream index */
132 SpecifierOpt *metadata;
134 SpecifierOpt *max_frames;
136 SpecifierOpt *bitstream_filters;
137 int nb_bitstream_filters;
138 SpecifierOpt *codec_tags;
140 SpecifierOpt *sample_fmts;
142 SpecifierOpt *qscale;
144 SpecifierOpt *forced_key_frames;
145 int nb_forced_key_frames;
146 SpecifierOpt *force_fps;
148 SpecifierOpt *frame_aspect_ratios;
149 int nb_frame_aspect_ratios;
150 SpecifierOpt *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;
160 SpecifierOpt *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;
168 SpecifierOpt *reinit_filters;
169 int nb_reinit_filters;
170 SpecifierOpt *fix_sub_duration;
171 int nb_fix_sub_duration;
174 SpecifierOpt *passlogfiles;
176 SpecifierOpt *guess_layout_max;
177 int nb_guess_layout_max;
180 typedef struct InputFilter {
181 AVFilterContext *filter;
182 struct InputStream *ist;
183 struct FilterGraph *graph;
187 typedef struct OutputFilter {
188 AVFilterContext *filter;
189 struct OutputStream *ost;
190 struct FilterGraph *graph;
193 /* temporary storage until stream maps are processed */
194 AVFilterInOut *out_tmp;
197 typedef struct FilterGraph {
199 const char *graph_desc;
201 AVFilterGraph *graph;
204 InputFilter **inputs;
206 OutputFilter **outputs;
210 typedef struct InputStream {
213 int discard; /* true if stream data should be discarded */
214 int decoding_needed; /* true if the packets must be decoded in 'raw_fifo' */
216 AVFrame *decoded_frame;
218 int64_t start; /* time when read started */
219 /* predicted dts of the next packet read for this stream or (when there are
220 * several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */
222 int64_t dts; ///< dts of the last packet read for this stream (in AV_TIME_BASE units)
224 int64_t next_pts; ///< synthetic pts for the next decode frame (in AV_TIME_BASE units)
225 int64_t pts; ///< current pts of the decoded frame (in AV_TIME_BASE units)
226 int wrap_correction_done;
228 int64_t filter_in_rescale_delta_last;
231 int is_start; /* is 1 at the start and after a discontinuity */
233 int showed_multi_packet_warning;
235 AVRational framerate; /* framerate forced with -r */
237 int guess_layout_max;
241 int resample_pix_fmt;
243 int resample_sample_fmt;
244 int resample_sample_rate;
245 int resample_channels;
246 uint64_t resample_channel_layout;
248 int fix_sub_duration;
249 struct { /* previous decoded subtitle and related variables */
258 AVFilterBufferRef *ref;
262 /* a pool of free buffers for decoded data */
263 FrameBuffer *buffer_pool;
266 /* decoded data from this stream goes into all those filters
267 * currently video and audio only */
268 InputFilter **filters;
274 typedef struct InputFile {
275 AVFormatContext *ctx;
276 int eof_reached; /* true if eof reached */
277 int eagain; /* true if last read attempt returned EAGAIN */
278 int ist_index; /* index of first stream in input_streams */
280 int nb_streams; /* number of stream that ffmpeg is aware of; may be different
281 from ctx.nb_streams if new streams appear during av_read_frame() */
282 int nb_streams_warn; /* number of streams that the user was warned of */
286 pthread_t thread; /* thread reading from this file */
287 int finished; /* the thread has exited */
288 int joined; /* the thread has been joined */
289 pthread_mutex_t fifo_lock; /* lock for access to fifo */
290 pthread_cond_t fifo_cond; /* the main thread will signal on this cond after reading from fifo */
291 AVFifoBuffer *fifo; /* demuxed packets are stored here; freed by the main thread */
295 enum forced_keyframes_const {
304 extern const char *const forced_keyframes_const_names[];
306 typedef struct OutputStream {
307 int file_index; /* file index */
308 int index; /* stream index in the output file */
309 int source_index; /* InputStream index */
310 AVStream *st; /* stream in the output file */
311 int encoding_needed; /* true if encoding needed for this stream */
313 /* input pts and corresponding output pts
315 struct InputStream *sync_ist; /* input stream to sync against */
316 int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
317 /* pts of the first frame encoded for this stream, used for limiting
320 AVBitStreamFilterContext *bitstream_filters;
323 AVFrame *filtered_frame;
326 AVRational frame_rate;
330 float frame_aspect_ratio;
332 /* forced key frames */
333 int64_t *forced_kf_pts;
336 char *forced_keyframes;
337 AVExpr *forced_keyframes_pexpr;
338 double forced_keyframes_expr_const_values[FKF_NB];
341 int audio_channels_map[SWR_CH_MAX]; /* list of the channels id to pick from the source stream */
342 int audio_channels_mapped; /* number of channels in audio_channels_map */
344 char *logfile_prefix;
347 OutputFilter *filter;
352 AVDictionary *swr_opts;
353 AVDictionary *resample_opts;
354 int finished; /* no more packets should be written for this stream */
355 int unavailable; /* true if the steram is unavailable (possibly temporarily) */
357 const char *attachment_filename;
358 int copy_initial_nonkeyframes;
359 int copy_prior_start;
364 typedef struct OutputFile {
365 AVFormatContext *ctx;
367 int ost_index; /* index of the first stream in output_streams */
368 int64_t recording_time; ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
369 int64_t start_time; ///< start time in microseconds == AV_TIME_BASE units
370 uint64_t limit_filesize; /* filesize limit expressed in bytes */
375 extern InputStream **input_streams;
376 extern int nb_input_streams;
377 extern InputFile **input_files;
378 extern int nb_input_files;
380 extern OutputStream **output_streams;
381 extern int nb_output_streams;
382 extern OutputFile **output_files;
383 extern int nb_output_files;
385 extern FilterGraph **filtergraphs;
386 extern int nb_filtergraphs;
388 extern char *vstats_filename;
390 extern float audio_drift_threshold;
391 extern float dts_delta_threshold;
392 extern float dts_error_threshold;
394 extern int audio_volume;
395 extern int audio_sync_method;
396 extern int video_sync_method;
397 extern int do_benchmark;
398 extern int do_benchmark_all;
399 extern int do_deinterlace;
400 extern int do_hex_dump;
401 extern int do_pkt_dump;
405 extern int exit_on_error;
406 extern int print_stats;
408 extern int stdin_interaction;
409 extern int frame_bits_per_raw_sample;
410 extern AVIOContext *progress_avio;
412 extern const AVIOInterruptCB int_cb;
414 extern const OptionDef options[];
416 void term_init(void);
417 void term_exit(void);
419 void reset_options(OptionsContext *o, int is_input);
420 void show_usage(void);
422 void opt_output_file(void *optctx, const char *filename);
424 void assert_avoptions(AVDictionary *m);
426 int guess_input_channel_layout(InputStream *ist);
428 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodec *codec, enum AVPixelFormat target);
429 void choose_sample_fmt(AVStream *st, AVCodec *codec);
431 int configure_filtergraph(FilterGraph *fg);
432 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
433 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
434 FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost);
436 int ffmpeg_parse_options(int argc, char **argv);
438 #endif /* FFMPEG_H */