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"
47 #include "libavutil/threadmessage.h"
49 #include "libswresample/swresample.h"
52 #define VSYNC_PASSTHROUGH 0
55 #define VSYNC_VSCFR 0xfe
56 #define VSYNC_DROP 0xff
58 #define MAX_STREAMS 1024 /* arbitrary sanity check value */
68 typedef struct HWAccel {
70 int (*init)(AVCodecContext *s);
72 enum AVPixelFormat pix_fmt;
75 /* select an input stream for an output stream */
76 typedef struct StreamMap {
77 int disabled; /* 1 is this mapping is disabled by a negative map */
81 int sync_stream_index;
82 char *linklabel; /* name of an output link, for mapping lavfi outputs */
86 int file_idx, stream_idx, channel_idx; // input
87 int ofile_idx, ostream_idx; // output
90 typedef struct OptionsContext {
93 /* input/output options */
98 SpecifierOpt *codec_names;
100 SpecifierOpt *audio_channels;
101 int nb_audio_channels;
102 SpecifierOpt *audio_sample_rate;
103 int nb_audio_sample_rate;
104 SpecifierOpt *frame_rates;
106 SpecifierOpt *frame_sizes;
108 SpecifierOpt *frame_pix_fmts;
109 int nb_frame_pix_fmts;
112 int64_t input_ts_offset;
115 int thread_queue_size;
117 SpecifierOpt *ts_scale;
119 SpecifierOpt *dump_attachment;
120 int nb_dump_attachment;
121 SpecifierOpt *hwaccels;
123 SpecifierOpt *hwaccel_devices;
124 int nb_hwaccel_devices;
125 SpecifierOpt *autorotate;
129 StreamMap *stream_maps;
131 AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */
132 int nb_audio_channel_maps; /* number of (valid) -map_channel settings */
133 int metadata_global_manual;
134 int metadata_streams_manual;
135 int metadata_chapters_manual;
136 const char **attachments;
139 int chapters_input_file;
141 int64_t recording_time;
143 uint64_t limit_filesize;
150 int subtitle_disable;
153 /* indexed by output file stream index */
157 SpecifierOpt *metadata;
159 SpecifierOpt *max_frames;
161 SpecifierOpt *bitstream_filters;
162 int nb_bitstream_filters;
163 SpecifierOpt *codec_tags;
165 SpecifierOpt *sample_fmts;
167 SpecifierOpt *qscale;
169 SpecifierOpt *forced_key_frames;
170 int nb_forced_key_frames;
171 SpecifierOpt *force_fps;
173 SpecifierOpt *frame_aspect_ratios;
174 int nb_frame_aspect_ratios;
175 SpecifierOpt *rc_overrides;
177 SpecifierOpt *intra_matrices;
178 int nb_intra_matrices;
179 SpecifierOpt *inter_matrices;
180 int nb_inter_matrices;
181 SpecifierOpt *chroma_intra_matrices;
182 int nb_chroma_intra_matrices;
183 SpecifierOpt *top_field_first;
184 int nb_top_field_first;
185 SpecifierOpt *metadata_map;
187 SpecifierOpt *presets;
189 SpecifierOpt *copy_initial_nonkeyframes;
190 int nb_copy_initial_nonkeyframes;
191 SpecifierOpt *copy_prior_start;
192 int nb_copy_prior_start;
193 SpecifierOpt *filters;
195 SpecifierOpt *filter_scripts;
196 int nb_filter_scripts;
197 SpecifierOpt *reinit_filters;
198 int nb_reinit_filters;
199 SpecifierOpt *fix_sub_duration;
200 int nb_fix_sub_duration;
201 SpecifierOpt *canvas_sizes;
205 SpecifierOpt *passlogfiles;
207 SpecifierOpt *guess_layout_max;
208 int nb_guess_layout_max;
211 SpecifierOpt *discard;
213 SpecifierOpt *disposition;
217 typedef struct InputFilter {
218 AVFilterContext *filter;
219 struct InputStream *ist;
220 struct FilterGraph *graph;
224 typedef struct OutputFilter {
225 AVFilterContext *filter;
226 struct OutputStream *ost;
227 struct FilterGraph *graph;
230 /* temporary storage until stream maps are processed */
231 AVFilterInOut *out_tmp;
232 enum AVMediaType type;
235 typedef struct FilterGraph {
237 const char *graph_desc;
239 AVFilterGraph *graph;
242 InputFilter **inputs;
244 OutputFilter **outputs;
248 typedef struct InputStream {
251 int discard; /* true if stream data should be discarded */
252 int user_set_discard;
253 int decoding_needed; /* non zero if the packets must be decoded in 'raw_fifo', see DECODING_FOR_* */
254 #define DECODING_FOR_OST 1
255 #define DECODING_FOR_FILTER 2
257 AVCodecContext *dec_ctx;
259 AVFrame *decoded_frame;
260 AVFrame *filter_frame; /* a ref of decoded_frame, to be sent to filters */
262 int64_t start; /* time when read started */
263 /* predicted dts of the next packet read for this stream or (when there are
264 * several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */
266 int64_t dts; ///< dts of the last packet read for this stream (in AV_TIME_BASE units)
268 int64_t next_pts; ///< synthetic pts for the next decode frame (in AV_TIME_BASE units)
269 int64_t pts; ///< current pts of the decoded frame (in AV_TIME_BASE units)
270 int wrap_correction_done;
272 int64_t filter_in_rescale_delta_last;
276 int showed_multi_packet_warning;
277 AVDictionary *decoder_opts;
278 AVRational framerate; /* framerate forced with -r */
280 int guess_layout_max;
285 int resample_pix_fmt;
287 int resample_sample_fmt;
288 int resample_sample_rate;
289 int resample_channels;
290 uint64_t resample_channel_layout;
292 int fix_sub_duration;
293 struct { /* previous decoded subtitle and related variables */
308 /* decoded data from this stream goes into all those filters
309 * currently video and audio only */
310 InputFilter **filters;
315 /* hwaccel options */
316 enum HWAccelID hwaccel_id;
317 char *hwaccel_device;
319 /* hwaccel context */
320 enum HWAccelID active_hwaccel_id;
322 void (*hwaccel_uninit)(AVCodecContext *s);
323 int (*hwaccel_get_buffer)(AVCodecContext *s, AVFrame *frame, int flags);
324 int (*hwaccel_retrieve_data)(AVCodecContext *s, AVFrame *frame);
325 enum AVPixelFormat hwaccel_pix_fmt;
326 enum AVPixelFormat hwaccel_retrieved_pix_fmt;
329 // combined size of all the packets read
331 /* number of packets successfully read for this stream */
333 // number of frames/samples retrieved from the decoder
334 uint64_t frames_decoded;
335 uint64_t samples_decoded;
338 typedef struct InputFile {
339 AVFormatContext *ctx;
340 int eof_reached; /* true if eof reached */
341 int eagain; /* true if last read attempt returned EAGAIN */
342 int ist_index; /* index of first stream in input_streams */
343 int64_t input_ts_offset;
346 int64_t start_time; /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
348 int64_t recording_time;
349 int nb_streams; /* number of stream that ffmpeg is aware of; may be different
350 from ctx.nb_streams if new streams appear during av_read_frame() */
351 int nb_streams_warn; /* number of streams that the user was warned of */
356 AVThreadMessageQueue *in_thread_queue;
357 pthread_t thread; /* thread reading from this file */
358 int non_blocking; /* reading packets from the thread should not block */
359 int joined; /* the thread has been joined */
360 int thread_queue_size; /* maximum number of queued packets */
364 enum forced_keyframes_const {
373 extern const char *const forced_keyframes_const_names[];
376 ENCODER_FINISHED = 1,
380 typedef struct OutputStream {
381 int file_index; /* file index */
382 int index; /* stream index in the output file */
383 int source_index; /* InputStream index */
384 AVStream *st; /* stream in the output file */
385 int encoding_needed; /* true if encoding needed for this stream */
387 /* input pts and corresponding output pts
389 struct InputStream *sync_ist; /* input stream to sync against */
390 int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
391 /* pts of the first frame encoded for this stream, used for limiting
394 /* dts of the last packet sent to the muxer */
395 int64_t last_mux_dts;
396 AVBitStreamFilterContext *bitstream_filters;
397 AVCodecContext *enc_ctx;
400 AVFrame *filtered_frame;
403 int last_nb0_frames[3];
406 AVRational frame_rate;
409 int rotate_overridden;
411 AVRational frame_aspect_ratio;
413 /* forced key frames */
414 int64_t *forced_kf_pts;
417 char *forced_keyframes;
418 AVExpr *forced_keyframes_pexpr;
419 double forced_keyframes_expr_const_values[FKF_NB];
422 int *audio_channels_map; /* list of the channels id to pick from the source stream */
423 int audio_channels_mapped; /* number of channels in audio_channels_map */
425 char *logfile_prefix;
428 OutputFilter *filter;
430 char *filters; ///< filtergraph associated to the -filter option
431 char *filters_script; ///< filtergraph script associated to the -filter_script option
434 AVDictionary *encoder_opts;
435 AVDictionary *swr_opts;
436 AVDictionary *resample_opts;
437 AVDictionary *bsf_args;
439 OSTFinished finished; /* no more packets should be written for this stream */
440 int unavailable; /* true if the steram is unavailable (possibly temporarily) */
442 const char *attachment_filename;
443 int copy_initial_nonkeyframes;
444 int copy_prior_start;
449 AVCodecParserContext *parser;
452 // combined size of all the packets written
454 // number of packets send to the muxer
455 uint64_t packets_written;
456 // number of frames/samples sent to the encoder
457 uint64_t frames_encoded;
458 uint64_t samples_encoded;
460 /* packet quality factor */
464 typedef struct OutputFile {
465 AVFormatContext *ctx;
467 int ost_index; /* index of the first stream in output_streams */
468 int64_t recording_time; ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
469 int64_t start_time; ///< start time in microseconds == AV_TIME_BASE units
470 uint64_t limit_filesize; /* filesize limit expressed in bytes */
475 extern InputStream **input_streams;
476 extern int nb_input_streams;
477 extern InputFile **input_files;
478 extern int nb_input_files;
480 extern OutputStream **output_streams;
481 extern int nb_output_streams;
482 extern OutputFile **output_files;
483 extern int nb_output_files;
485 extern FilterGraph **filtergraphs;
486 extern int nb_filtergraphs;
488 extern char *vstats_filename;
489 extern char *sdp_filename;
491 extern float audio_drift_threshold;
492 extern float dts_delta_threshold;
493 extern float dts_error_threshold;
495 extern int audio_volume;
496 extern int audio_sync_method;
497 extern int video_sync_method;
498 extern float frame_drop_threshold;
499 extern int do_benchmark;
500 extern int do_benchmark_all;
501 extern int do_deinterlace;
502 extern int do_hex_dump;
503 extern int do_pkt_dump;
505 extern int start_at_zero;
508 extern int exit_on_error;
509 extern int print_stats;
511 extern int stdin_interaction;
512 extern int frame_bits_per_raw_sample;
513 extern AVIOContext *progress_avio;
514 extern float max_error_rate;
515 extern int vdpau_api_ver;
517 extern const AVIOInterruptCB int_cb;
519 extern const OptionDef options[];
520 extern const HWAccel hwaccels[];
523 void term_init(void);
524 void term_exit(void);
526 void reset_options(OptionsContext *o, int is_input);
527 void show_usage(void);
529 void opt_output_file(void *optctx, const char *filename);
531 void remove_avoptions(AVDictionary **a, AVDictionary *b);
532 void assert_avoptions(AVDictionary *m);
534 int guess_input_channel_layout(InputStream *ist);
536 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *avctx, AVCodec *codec, enum AVPixelFormat target);
537 void choose_sample_fmt(AVStream *st, AVCodec *codec);
539 int configure_filtergraph(FilterGraph *fg);
540 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
541 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
542 FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost);
543 int init_complex_filtergraph(FilterGraph *fg);
545 int ffmpeg_parse_options(int argc, char **argv);
547 int vdpau_init(AVCodecContext *s);
548 int dxva2_init(AVCodecContext *s);
549 int vda_init(AVCodecContext *s);
551 #endif /* FFMPEG_H */