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/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_DROP 0xff
56 #define MAX_STREAMS 1024 /* arbitrary sanity check value */
58 /* select an input stream for an output stream */
59 typedef struct StreamMap {
60 int disabled; /** 1 is this mapping is disabled by a negative map */
64 int sync_stream_index;
65 char *linklabel; /** name of an output link, for mapping lavfi outputs */
69 int file_idx, stream_idx, channel_idx; // input
70 int ofile_idx, ostream_idx; // output
73 typedef struct OptionsContext {
74 /* input/output options */
78 SpecifierOpt *codec_names;
80 SpecifierOpt *audio_channels;
81 int nb_audio_channels;
82 SpecifierOpt *audio_sample_rate;
83 int nb_audio_sample_rate;
84 SpecifierOpt *frame_rates;
86 SpecifierOpt *frame_sizes;
88 SpecifierOpt *frame_pix_fmts;
89 int nb_frame_pix_fmts;
92 int64_t input_ts_offset;
95 SpecifierOpt *ts_scale;
97 SpecifierOpt *dump_attachment;
98 int nb_dump_attachment;
101 StreamMap *stream_maps;
103 AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */
104 int nb_audio_channel_maps; /* number of (valid) -map_channel settings */
105 int metadata_global_manual;
106 int metadata_streams_manual;
107 int metadata_chapters_manual;
108 const char **attachments;
111 int chapters_input_file;
113 int64_t recording_time;
114 uint64_t limit_filesize;
121 int subtitle_disable;
124 /* indexed by output file stream index */
128 SpecifierOpt *metadata;
130 SpecifierOpt *max_frames;
132 SpecifierOpt *bitstream_filters;
133 int nb_bitstream_filters;
134 SpecifierOpt *codec_tags;
136 SpecifierOpt *sample_fmts;
138 SpecifierOpt *qscale;
140 SpecifierOpt *forced_key_frames;
141 int nb_forced_key_frames;
142 SpecifierOpt *force_fps;
144 SpecifierOpt *frame_aspect_ratios;
145 int nb_frame_aspect_ratios;
146 SpecifierOpt *rc_overrides;
148 SpecifierOpt *intra_matrices;
149 int nb_intra_matrices;
150 SpecifierOpt *inter_matrices;
151 int nb_inter_matrices;
152 SpecifierOpt *top_field_first;
153 int nb_top_field_first;
154 SpecifierOpt *metadata_map;
156 SpecifierOpt *presets;
158 SpecifierOpt *copy_initial_nonkeyframes;
159 int nb_copy_initial_nonkeyframes;
160 SpecifierOpt *copy_prior_start;
161 int nb_copy_prior_start;
162 SpecifierOpt *filters;
164 SpecifierOpt *fix_sub_duration;
165 int nb_fix_sub_duration;
168 SpecifierOpt *passlogfiles;
172 typedef struct InputFilter {
173 AVFilterContext *filter;
174 struct InputStream *ist;
175 struct FilterGraph *graph;
179 typedef struct OutputFilter {
180 AVFilterContext *filter;
181 struct OutputStream *ost;
182 struct FilterGraph *graph;
185 /* temporary storage until stream maps are processed */
186 AVFilterInOut *out_tmp;
189 typedef struct FilterGraph {
191 const char *graph_desc;
193 AVFilterGraph *graph;
195 InputFilter **inputs;
197 OutputFilter **outputs;
201 typedef struct InputStream {
204 int discard; /* true if stream data should be discarded */
205 int decoding_needed; /* true if the packets must be decoded in 'raw_fifo' */
207 AVFrame *decoded_frame;
209 int64_t start; /* time when read started */
210 /* predicted dts of the next packet read for this stream or (when there are
211 * several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */
213 int64_t dts; ///< dts of the last packet read for this stream (in AV_TIME_BASE units)
215 int64_t next_pts; ///< synthetic pts for the next decode frame (in AV_TIME_BASE units)
216 int64_t pts; ///< current pts of the decoded frame (in AV_TIME_BASE units)
217 int wrap_correction_done;
219 int is_start; /* is 1 at the start and after a discontinuity */
221 int showed_multi_packet_warning;
223 AVRational framerate; /* framerate forced with -r */
228 int resample_pix_fmt;
230 int resample_sample_fmt;
231 int resample_sample_rate;
232 int resample_channels;
233 uint64_t resample_channel_layout;
235 int fix_sub_duration;
236 struct { /* previous decoded subtitle and related variables */
244 AVFilterBufferRef *ref;
248 /* a pool of free buffers for decoded data */
249 FrameBuffer *buffer_pool;
252 /* decoded data from this stream goes into all those filters
253 * currently video and audio only */
254 InputFilter **filters;
258 typedef struct InputFile {
259 AVFormatContext *ctx;
260 int eof_reached; /* true if eof reached */
261 int eagain; /* true if last read attempt returned EAGAIN */
262 int ist_index; /* index of first stream in input_streams */
264 int nb_streams; /* number of stream that ffmpeg is aware of; may be different
265 from ctx.nb_streams if new streams appear during av_read_frame() */
266 int nb_streams_warn; /* number of streams that the user was warned of */
270 pthread_t thread; /* thread reading from this file */
271 int finished; /* the thread has exited */
272 int joined; /* the thread has been joined */
273 pthread_mutex_t fifo_lock; /* lock for access to fifo */
274 pthread_cond_t fifo_cond; /* the main thread will signal on this cond after reading from fifo */
275 AVFifoBuffer *fifo; /* demuxed packets are stored here; freed by the main thread */
279 typedef struct OutputStream {
280 int file_index; /* file index */
281 int index; /* stream index in the output file */
282 int source_index; /* InputStream index */
283 AVStream *st; /* stream in the output file */
284 int encoding_needed; /* true if encoding needed for this stream */
286 /* input pts and corresponding output pts
288 struct InputStream *sync_ist; /* input stream to sync against */
289 int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
290 /* pts of the first frame encoded for this stream, used for limiting
293 AVBitStreamFilterContext *bitstream_filters;
296 AVFrame *filtered_frame;
299 AVRational frame_rate;
303 float frame_aspect_ratio;
306 /* forced key frames */
307 int64_t *forced_kf_pts;
310 char *forced_keyframes;
313 int audio_channels_map[SWR_CH_MAX]; /* list of the channels id to pick from the source stream */
314 int audio_channels_mapped; /* number of channels in audio_channels_map */
316 char *logfile_prefix;
319 OutputFilter *filter;
323 int64_t swr_dither_method;
324 double swr_dither_scale;
326 int finished; /* no more packets should be written for this stream */
327 int unavailable; /* true if the steram is unavailable (possibly temporarily) */
329 const char *attachment_filename;
330 int copy_initial_nonkeyframes;
331 int copy_prior_start;
336 typedef struct OutputFile {
337 AVFormatContext *ctx;
339 int ost_index; /* index of the first stream in output_streams */
340 int64_t recording_time; ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
341 int64_t start_time; ///< start time in microseconds == AV_TIME_BASE units
342 uint64_t limit_filesize; /* filesize limit expressed in bytes */
347 extern InputStream **input_streams;
348 extern int nb_input_streams;
349 extern InputFile **input_files;
350 extern int nb_input_files;
352 extern OutputStream **output_streams;
353 extern int nb_output_streams;
354 extern OutputFile **output_files;
355 extern int nb_output_files;
357 extern FilterGraph **filtergraphs;
358 extern int nb_filtergraphs;
360 extern char *vstats_filename;
362 extern float audio_drift_threshold;
363 extern float dts_delta_threshold;
364 extern float dts_error_threshold;
366 extern int audio_volume;
367 extern int audio_sync_method;
368 extern int video_sync_method;
369 extern int do_benchmark;
370 extern int do_benchmark_all;
371 extern int do_deinterlace;
372 extern int do_hex_dump;
373 extern int do_pkt_dump;
377 extern int exit_on_error;
378 extern int print_stats;
380 extern int same_quant;
381 extern int stdin_interaction;
382 extern int frame_bits_per_raw_sample;
383 extern AVIOContext *progress_avio;
385 extern const AVIOInterruptCB int_cb;
387 extern const OptionDef options[];
389 void term_init(void);
390 void term_exit(void);
392 void reset_options(OptionsContext *o, int is_input);
393 void show_usage(void);
395 void opt_output_file(void *optctx, const char *filename);
397 void assert_avoptions(AVDictionary *m);
399 int guess_input_channel_layout(InputStream *ist);
401 enum PixelFormat choose_pixel_fmt(AVStream *st, AVCodec *codec, enum PixelFormat target);
402 void choose_sample_fmt(AVStream *st, AVCodec *codec);
404 int configure_filtergraph(FilterGraph *fg);
405 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
406 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
407 FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost);
409 #endif /* FFMPEG_H */