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 */
67 typedef struct HWAccel {
69 int (*init)(AVCodecContext *s);
71 enum AVPixelFormat pix_fmt;
74 /* select an input stream for an output stream */
75 typedef struct StreamMap {
76 int disabled; /* 1 is this mapping is disabled by a negative map */
80 int sync_stream_index;
81 char *linklabel; /* name of an output link, for mapping lavfi outputs */
85 int file_idx, stream_idx, channel_idx; // input
86 int ofile_idx, ostream_idx; // output
89 typedef struct OptionsContext {
92 /* input/output options */
96 SpecifierOpt *codec_names;
98 SpecifierOpt *audio_channels;
99 int nb_audio_channels;
100 SpecifierOpt *audio_sample_rate;
101 int nb_audio_sample_rate;
102 SpecifierOpt *frame_rates;
104 SpecifierOpt *frame_sizes;
106 SpecifierOpt *frame_pix_fmts;
107 int nb_frame_pix_fmts;
110 int64_t input_ts_offset;
114 SpecifierOpt *ts_scale;
116 SpecifierOpt *dump_attachment;
117 int nb_dump_attachment;
118 SpecifierOpt *hwaccels;
120 SpecifierOpt *hwaccel_devices;
121 int nb_hwaccel_devices;
124 StreamMap *stream_maps;
126 AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */
127 int nb_audio_channel_maps; /* number of (valid) -map_channel settings */
128 int metadata_global_manual;
129 int metadata_streams_manual;
130 int metadata_chapters_manual;
131 const char **attachments;
134 int chapters_input_file;
136 int64_t recording_time;
138 uint64_t limit_filesize;
145 int subtitle_disable;
148 /* indexed by output file stream index */
152 SpecifierOpt *metadata;
154 SpecifierOpt *max_frames;
156 SpecifierOpt *bitstream_filters;
157 int nb_bitstream_filters;
158 SpecifierOpt *codec_tags;
160 SpecifierOpt *sample_fmts;
162 SpecifierOpt *qscale;
164 SpecifierOpt *forced_key_frames;
165 int nb_forced_key_frames;
166 SpecifierOpt *force_fps;
168 SpecifierOpt *frame_aspect_ratios;
169 int nb_frame_aspect_ratios;
170 SpecifierOpt *rc_overrides;
172 SpecifierOpt *intra_matrices;
173 int nb_intra_matrices;
174 SpecifierOpt *inter_matrices;
175 int nb_inter_matrices;
176 SpecifierOpt *chroma_intra_matrices;
177 int nb_chroma_intra_matrices;
178 SpecifierOpt *top_field_first;
179 int nb_top_field_first;
180 SpecifierOpt *metadata_map;
182 SpecifierOpt *presets;
184 SpecifierOpt *copy_initial_nonkeyframes;
185 int nb_copy_initial_nonkeyframes;
186 SpecifierOpt *copy_prior_start;
187 int nb_copy_prior_start;
188 SpecifierOpt *filters;
190 SpecifierOpt *filter_scripts;
191 int nb_filter_scripts;
192 SpecifierOpt *reinit_filters;
193 int nb_reinit_filters;
194 SpecifierOpt *fix_sub_duration;
195 int nb_fix_sub_duration;
196 SpecifierOpt *canvas_sizes;
200 SpecifierOpt *passlogfiles;
202 SpecifierOpt *guess_layout_max;
203 int nb_guess_layout_max;
208 typedef struct InputFilter {
209 AVFilterContext *filter;
210 struct InputStream *ist;
211 struct FilterGraph *graph;
215 typedef struct OutputFilter {
216 AVFilterContext *filter;
217 struct OutputStream *ost;
218 struct FilterGraph *graph;
221 /* temporary storage until stream maps are processed */
222 AVFilterInOut *out_tmp;
225 typedef struct FilterGraph {
227 const char *graph_desc;
229 AVFilterGraph *graph;
232 InputFilter **inputs;
234 OutputFilter **outputs;
238 typedef struct InputStream {
241 int discard; /* true if stream data should be discarded */
242 int decoding_needed; /* true if the packets must be decoded in 'raw_fifo' */
244 AVFrame *decoded_frame;
245 AVFrame *filter_frame; /* a ref of decoded_frame, to be sent to filters */
247 int64_t start; /* time when read started */
248 /* predicted dts of the next packet read for this stream or (when there are
249 * several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */
251 int64_t dts; ///< dts of the last packet read for this stream (in AV_TIME_BASE units)
253 int64_t next_pts; ///< synthetic pts for the next decode frame (in AV_TIME_BASE units)
254 int64_t pts; ///< current pts of the decoded frame (in AV_TIME_BASE units)
255 int wrap_correction_done;
257 int64_t filter_in_rescale_delta_last;
261 int showed_multi_packet_warning;
262 AVDictionary *decoder_opts;
263 AVRational framerate; /* framerate forced with -r */
265 int guess_layout_max;
269 int resample_pix_fmt;
271 int resample_sample_fmt;
272 int resample_sample_rate;
273 int resample_channels;
274 uint64_t resample_channel_layout;
276 int fix_sub_duration;
277 struct { /* previous decoded subtitle and related variables */
292 /* decoded data from this stream goes into all those filters
293 * currently video and audio only */
294 InputFilter **filters;
299 /* hwaccel options */
300 enum HWAccelID hwaccel_id;
301 char *hwaccel_device;
303 /* hwaccel context */
304 enum HWAccelID active_hwaccel_id;
306 void (*hwaccel_uninit)(AVCodecContext *s);
307 int (*hwaccel_get_buffer)(AVCodecContext *s, AVFrame *frame, int flags);
308 int (*hwaccel_retrieve_data)(AVCodecContext *s, AVFrame *frame);
309 enum AVPixelFormat hwaccel_pix_fmt;
310 enum AVPixelFormat hwaccel_retrieved_pix_fmt;
313 // combined size of all the packets read
315 /* number of packets successfully read for this stream */
317 // number of frames/samples retrieved from the decoder
318 uint64_t frames_decoded;
319 uint64_t samples_decoded;
322 typedef struct InputFile {
323 AVFormatContext *ctx;
324 int eof_reached; /* true if eof reached */
325 int eagain; /* true if last read attempt returned EAGAIN */
326 int ist_index; /* index of first stream in input_streams */
327 int64_t input_ts_offset;
330 int64_t start_time; /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
331 int64_t recording_time;
332 int nb_streams; /* number of stream that ffmpeg is aware of; may be different
333 from ctx.nb_streams if new streams appear during av_read_frame() */
334 int nb_streams_warn; /* number of streams that the user was warned of */
339 pthread_t thread; /* thread reading from this file */
340 int non_blocking; /* reading packets from the thread should not block */
341 int finished; /* the thread has exited */
342 int joined; /* the thread has been joined */
343 pthread_mutex_t fifo_lock; /* lock for access to fifo */
344 pthread_cond_t fifo_cond; /* the main thread will signal on this cond after reading from fifo */
345 AVFifoBuffer *fifo; /* demuxed packets are stored here; freed by the main thread */
349 enum forced_keyframes_const {
358 extern const char *const forced_keyframes_const_names[];
361 ENCODER_FINISHED = 1,
365 typedef struct OutputStream {
366 int file_index; /* file index */
367 int index; /* stream index in the output file */
368 int source_index; /* InputStream index */
369 AVStream *st; /* stream in the output file */
370 int encoding_needed; /* true if encoding needed for this stream */
372 /* input pts and corresponding output pts
374 struct InputStream *sync_ist; /* input stream to sync against */
375 int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
376 /* pts of the first frame encoded for this stream, used for limiting
379 /* dts of the last packet sent to the muxer */
380 int64_t last_mux_dts;
381 AVBitStreamFilterContext *bitstream_filters;
384 AVFrame *filtered_frame;
387 AVRational frame_rate;
391 AVRational frame_aspect_ratio;
393 /* forced key frames */
394 int64_t *forced_kf_pts;
397 char *forced_keyframes;
398 AVExpr *forced_keyframes_pexpr;
399 double forced_keyframes_expr_const_values[FKF_NB];
402 int audio_channels_map[SWR_CH_MAX]; /* list of the channels id to pick from the source stream */
403 int audio_channels_mapped; /* number of channels in audio_channels_map */
405 char *logfile_prefix;
408 OutputFilter *filter;
410 char *filters; ///< filtergraph associated to the -filter option
411 char *filters_script; ///< filtergraph script associated to the -filter_script option
414 AVDictionary *encoder_opts;
415 AVDictionary *swr_opts;
416 AVDictionary *resample_opts;
418 OSTFinished finished; /* no more packets should be written for this stream */
419 int unavailable; /* true if the steram is unavailable (possibly temporarily) */
421 const char *attachment_filename;
422 int copy_initial_nonkeyframes;
423 int copy_prior_start;
427 AVCodecParserContext *parser;
430 // combined size of all the packets written
432 // number of packets send to the muxer
433 uint64_t packets_written;
434 // number of frames/samples sent to the encoder
435 uint64_t frames_encoded;
436 uint64_t samples_encoded;
439 typedef struct OutputFile {
440 AVFormatContext *ctx;
442 int ost_index; /* index of the first stream in output_streams */
443 int64_t recording_time; ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
444 int64_t start_time; ///< start time in microseconds == AV_TIME_BASE units
445 uint64_t limit_filesize; /* filesize limit expressed in bytes */
450 extern InputStream **input_streams;
451 extern int nb_input_streams;
452 extern InputFile **input_files;
453 extern int nb_input_files;
455 extern OutputStream **output_streams;
456 extern int nb_output_streams;
457 extern OutputFile **output_files;
458 extern int nb_output_files;
460 extern FilterGraph **filtergraphs;
461 extern int nb_filtergraphs;
463 extern char *vstats_filename;
465 extern float audio_drift_threshold;
466 extern float dts_delta_threshold;
467 extern float dts_error_threshold;
469 extern int audio_volume;
470 extern int audio_sync_method;
471 extern int video_sync_method;
472 extern int do_benchmark;
473 extern int do_benchmark_all;
474 extern int do_deinterlace;
475 extern int do_hex_dump;
476 extern int do_pkt_dump;
480 extern int exit_on_error;
481 extern int print_stats;
483 extern int stdin_interaction;
484 extern int frame_bits_per_raw_sample;
485 extern AVIOContext *progress_avio;
486 extern float max_error_rate;
488 extern const AVIOInterruptCB int_cb;
490 extern const OptionDef options[];
491 extern const HWAccel hwaccels[];
494 void term_init(void);
495 void term_exit(void);
497 void reset_options(OptionsContext *o, int is_input);
498 void show_usage(void);
500 void opt_output_file(void *optctx, const char *filename);
502 void assert_avoptions(AVDictionary *m);
504 int guess_input_channel_layout(InputStream *ist);
506 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodec *codec, enum AVPixelFormat target);
507 void choose_sample_fmt(AVStream *st, AVCodec *codec);
509 int configure_filtergraph(FilterGraph *fg);
510 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
511 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
512 FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost);
514 int ffmpeg_parse_options(int argc, char **argv);
516 int vdpau_init(AVCodecContext *s);
517 int dxva2_init(AVCodecContext *s);
518 int vda_init(AVCodecContext *s);
520 #endif /* FFMPEG_H */