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 */
72 typedef struct HWAccel {
74 int (*init)(AVCodecContext *s);
76 enum AVPixelFormat pix_fmt;
79 /* select an input stream for an output stream */
80 typedef struct StreamMap {
81 int disabled; /* 1 is this mapping is disabled by a negative map */
85 int sync_stream_index;
86 char *linklabel; /* name of an output link, for mapping lavfi outputs */
90 int file_idx, stream_idx, channel_idx; // input
91 int ofile_idx, ostream_idx; // output
94 typedef struct OptionsContext {
97 /* input/output options */
99 int64_t start_time_eof;
103 SpecifierOpt *codec_names;
105 SpecifierOpt *audio_channels;
106 int nb_audio_channels;
107 SpecifierOpt *audio_sample_rate;
108 int nb_audio_sample_rate;
109 SpecifierOpt *frame_rates;
111 SpecifierOpt *frame_sizes;
113 SpecifierOpt *frame_pix_fmts;
114 int nb_frame_pix_fmts;
117 int64_t input_ts_offset;
121 int thread_queue_size;
123 SpecifierOpt *ts_scale;
125 SpecifierOpt *dump_attachment;
126 int nb_dump_attachment;
127 SpecifierOpt *hwaccels;
129 SpecifierOpt *hwaccel_devices;
130 int nb_hwaccel_devices;
131 SpecifierOpt *hwaccel_output_formats;
132 int nb_hwaccel_output_formats;
133 SpecifierOpt *autorotate;
137 StreamMap *stream_maps;
139 AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */
140 int nb_audio_channel_maps; /* number of (valid) -map_channel settings */
141 int metadata_global_manual;
142 int metadata_streams_manual;
143 int metadata_chapters_manual;
144 const char **attachments;
147 int chapters_input_file;
149 int64_t recording_time;
151 uint64_t limit_filesize;
158 int subtitle_disable;
161 /* indexed by output file stream index */
165 SpecifierOpt *metadata;
167 SpecifierOpt *max_frames;
169 SpecifierOpt *bitstream_filters;
170 int nb_bitstream_filters;
171 SpecifierOpt *codec_tags;
173 SpecifierOpt *sample_fmts;
175 SpecifierOpt *qscale;
177 SpecifierOpt *forced_key_frames;
178 int nb_forced_key_frames;
179 SpecifierOpt *force_fps;
181 SpecifierOpt *frame_aspect_ratios;
182 int nb_frame_aspect_ratios;
183 SpecifierOpt *rc_overrides;
185 SpecifierOpt *intra_matrices;
186 int nb_intra_matrices;
187 SpecifierOpt *inter_matrices;
188 int nb_inter_matrices;
189 SpecifierOpt *chroma_intra_matrices;
190 int nb_chroma_intra_matrices;
191 SpecifierOpt *top_field_first;
192 int nb_top_field_first;
193 SpecifierOpt *metadata_map;
195 SpecifierOpt *presets;
197 SpecifierOpt *copy_initial_nonkeyframes;
198 int nb_copy_initial_nonkeyframes;
199 SpecifierOpt *copy_prior_start;
200 int nb_copy_prior_start;
201 SpecifierOpt *filters;
203 SpecifierOpt *filter_scripts;
204 int nb_filter_scripts;
205 SpecifierOpt *reinit_filters;
206 int nb_reinit_filters;
207 SpecifierOpt *fix_sub_duration;
208 int nb_fix_sub_duration;
209 SpecifierOpt *canvas_sizes;
213 SpecifierOpt *passlogfiles;
215 SpecifierOpt *max_muxing_queue_size;
216 int nb_max_muxing_queue_size;
217 SpecifierOpt *guess_layout_max;
218 int nb_guess_layout_max;
221 SpecifierOpt *discard;
223 SpecifierOpt *disposition;
225 SpecifierOpt *program;
227 SpecifierOpt *time_bases;
229 SpecifierOpt *enc_time_bases;
230 int nb_enc_time_bases;
233 typedef struct InputFilter {
234 AVFilterContext *filter;
235 struct InputStream *ist;
236 struct FilterGraph *graph;
238 enum AVMediaType type; // AVMEDIA_TYPE_SUBTITLE for sub2video
240 AVFifoBuffer *frame_queue;
242 // parameters configured for this input
246 AVRational sample_aspect_ratio;
250 uint64_t channel_layout;
252 AVBufferRef *hw_frames_ctx;
257 typedef struct OutputFilter {
258 AVFilterContext *filter;
259 struct OutputStream *ost;
260 struct FilterGraph *graph;
263 /* temporary storage until stream maps are processed */
264 AVFilterInOut *out_tmp;
265 enum AVMediaType type;
267 /* desired output stream properties */
269 AVRational frame_rate;
272 uint64_t channel_layout;
274 // those are only set if no format is specified and the encoder gives us multiple options
276 uint64_t *channel_layouts;
280 typedef struct FilterGraph {
282 const char *graph_desc;
284 AVFilterGraph *graph;
287 InputFilter **inputs;
289 OutputFilter **outputs;
293 typedef struct InputStream {
296 int discard; /* true if stream data should be discarded */
297 int user_set_discard;
298 int decoding_needed; /* non zero if the packets must be decoded in 'raw_fifo', see DECODING_FOR_* */
299 #define DECODING_FOR_OST 1
300 #define DECODING_FOR_FILTER 2
302 AVCodecContext *dec_ctx;
304 AVFrame *decoded_frame;
305 AVFrame *filter_frame; /* a ref of decoded_frame, to be sent to filters */
307 int64_t start; /* time when read started */
308 /* predicted dts of the next packet read for this stream or (when there are
309 * several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */
311 int64_t dts; ///< dts of the last packet read for this stream (in AV_TIME_BASE units)
313 int64_t next_pts; ///< synthetic pts for the next decode frame (in AV_TIME_BASE units)
314 int64_t pts; ///< current pts of the decoded frame (in AV_TIME_BASE units)
315 int wrap_correction_done;
317 int64_t filter_in_rescale_delta_last;
319 int64_t min_pts; /* pts with the smallest value in a current stream */
320 int64_t max_pts; /* pts with the higher value in a current stream */
322 // when forcing constant input framerate through -r,
323 // this contains the pts that will be given to the next decoded frame
324 int64_t cfr_next_pts;
326 int64_t nb_samples; /* number of samples in the last decoded audio frame before looping */
330 AVDictionary *decoder_opts;
331 AVRational framerate; /* framerate forced with -r */
333 int guess_layout_max;
337 int fix_sub_duration;
338 struct { /* previous decoded subtitle and related variables */
347 AVFifoBuffer *sub_queue; ///< queue of AVSubtitle* before filter init
354 /* decoded data from this stream goes into all those filters
355 * currently video and audio only */
356 InputFilter **filters;
361 /* hwaccel options */
362 enum HWAccelID hwaccel_id;
363 char *hwaccel_device;
364 enum AVPixelFormat hwaccel_output_format;
366 /* hwaccel context */
367 enum HWAccelID active_hwaccel_id;
369 void (*hwaccel_uninit)(AVCodecContext *s);
370 int (*hwaccel_get_buffer)(AVCodecContext *s, AVFrame *frame, int flags);
371 int (*hwaccel_retrieve_data)(AVCodecContext *s, AVFrame *frame);
372 enum AVPixelFormat hwaccel_pix_fmt;
373 enum AVPixelFormat hwaccel_retrieved_pix_fmt;
374 AVBufferRef *hw_frames_ctx;
377 // combined size of all the packets read
379 /* number of packets successfully read for this stream */
381 // number of frames/samples retrieved from the decoder
382 uint64_t frames_decoded;
383 uint64_t samples_decoded;
391 typedef struct InputFile {
392 AVFormatContext *ctx;
393 int eof_reached; /* true if eof reached */
394 int eagain; /* true if last read attempt returned EAGAIN */
395 int ist_index; /* index of first stream in input_streams */
396 int loop; /* set number of times input stream should be looped */
397 int64_t duration; /* actual duration of the longest stream in a file
398 at the moment when looping happens */
399 AVRational time_base; /* time base of the duration */
400 int64_t input_ts_offset;
404 int64_t start_time; /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
406 int64_t recording_time;
407 int nb_streams; /* number of stream that ffmpeg is aware of; may be different
408 from ctx.nb_streams if new streams appear during av_read_frame() */
409 int nb_streams_warn; /* number of streams that the user was warned of */
414 AVThreadMessageQueue *in_thread_queue;
415 pthread_t thread; /* thread reading from this file */
416 int non_blocking; /* reading packets from the thread should not block */
417 int joined; /* the thread has been joined */
418 int thread_queue_size; /* maximum number of queued packets */
422 enum forced_keyframes_const {
431 #define ABORT_ON_FLAG_EMPTY_OUTPUT (1 << 0)
433 extern const char *const forced_keyframes_const_names[];
436 ENCODER_FINISHED = 1,
440 typedef struct OutputStream {
441 int file_index; /* file index */
442 int index; /* stream index in the output file */
443 int source_index; /* InputStream index */
444 AVStream *st; /* stream in the output file */
445 int encoding_needed; /* true if encoding needed for this stream */
447 /* input pts and corresponding output pts
449 struct InputStream *sync_ist; /* input stream to sync against */
450 int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
451 /* pts of the first frame encoded for this stream, used for limiting
454 /* dts of the last packet sent to the muxer */
455 int64_t last_mux_dts;
456 // the timebase of the packets sent to the muxer
457 AVRational mux_timebase;
458 AVRational enc_timebase;
460 int nb_bitstream_filters;
461 uint8_t *bsf_extradata_updated;
462 AVBSFContext **bsf_ctx;
464 AVCodecContext *enc_ctx;
465 AVCodecParameters *ref_par; /* associated input codec parameters with encoders options applied */
468 AVFrame *filtered_frame;
471 int last_nb0_frames[3];
476 AVRational frame_rate;
480 int rotate_overridden;
481 double rotate_override_value;
483 AVRational frame_aspect_ratio;
485 /* forced key frames */
486 int64_t *forced_kf_pts;
489 char *forced_keyframes;
490 AVExpr *forced_keyframes_pexpr;
491 double forced_keyframes_expr_const_values[FKF_NB];
494 int *audio_channels_map; /* list of the channels id to pick from the source stream */
495 int audio_channels_mapped; /* number of channels in audio_channels_map */
497 char *logfile_prefix;
500 OutputFilter *filter;
502 char *filters; ///< filtergraph associated to the -filter option
503 char *filters_script; ///< filtergraph script associated to the -filter_script option
505 AVDictionary *encoder_opts;
506 AVDictionary *sws_dict;
507 AVDictionary *swr_opts;
508 AVDictionary *resample_opts;
510 OSTFinished finished; /* no more packets should be written for this stream */
511 int unavailable; /* true if the steram is unavailable (possibly temporarily) */
514 // init_output_stream() has been called for this stream
515 // The encoder and the bitstream filters have been initialized and the stream
516 // parameters are set in the AVStream.
521 const char *attachment_filename;
522 int copy_initial_nonkeyframes;
523 int copy_prior_start;
528 AVCodecParserContext *parser;
529 AVCodecContext *parser_avctx;
532 // combined size of all the packets written
534 // number of packets send to the muxer
535 uint64_t packets_written;
536 // number of frames/samples sent to the encoder
537 uint64_t frames_encoded;
538 uint64_t samples_encoded;
540 /* packet quality factor */
543 int max_muxing_queue_size;
545 /* the packets are buffered here until the muxer is ready to be initialized */
546 AVFifoBuffer *muxing_queue;
548 /* packet picture type */
551 /* frame encode sum of squared error values */
555 typedef struct OutputFile {
556 AVFormatContext *ctx;
558 int ost_index; /* index of the first stream in output_streams */
559 int64_t recording_time; ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
560 int64_t start_time; ///< start time in microseconds == AV_TIME_BASE units
561 uint64_t limit_filesize; /* filesize limit expressed in bytes */
568 extern InputStream **input_streams;
569 extern int nb_input_streams;
570 extern InputFile **input_files;
571 extern int nb_input_files;
573 extern OutputStream **output_streams;
574 extern int nb_output_streams;
575 extern OutputFile **output_files;
576 extern int nb_output_files;
578 extern FilterGraph **filtergraphs;
579 extern int nb_filtergraphs;
581 extern char *vstats_filename;
582 extern char *sdp_filename;
584 extern float audio_drift_threshold;
585 extern float dts_delta_threshold;
586 extern float dts_error_threshold;
588 extern int audio_volume;
589 extern int audio_sync_method;
590 extern int video_sync_method;
591 extern float frame_drop_threshold;
592 extern int do_benchmark;
593 extern int do_benchmark_all;
594 extern int do_deinterlace;
595 extern int do_hex_dump;
596 extern int do_pkt_dump;
598 extern int start_at_zero;
601 extern int exit_on_error;
602 extern int abort_on_flags;
603 extern int print_stats;
605 extern int stdin_interaction;
606 extern int frame_bits_per_raw_sample;
607 extern AVIOContext *progress_avio;
608 extern float max_error_rate;
609 extern char *videotoolbox_pixfmt;
611 extern int filter_nbthreads;
612 extern int filter_complex_nbthreads;
613 extern int vstats_version;
615 extern const AVIOInterruptCB int_cb;
617 extern const OptionDef options[];
618 extern const HWAccel hwaccels[];
619 extern int hwaccel_lax_profile_check;
620 extern AVBufferRef *hw_device_ctx;
622 extern char *qsv_device;
626 void term_init(void);
627 void term_exit(void);
629 void reset_options(OptionsContext *o, int is_input);
630 void show_usage(void);
632 void opt_output_file(void *optctx, const char *filename);
634 void remove_avoptions(AVDictionary **a, AVDictionary *b);
635 void assert_avoptions(AVDictionary *m);
637 int guess_input_channel_layout(InputStream *ist);
639 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *avctx, AVCodec *codec, enum AVPixelFormat target);
640 void choose_sample_fmt(AVStream *st, AVCodec *codec);
642 int configure_filtergraph(FilterGraph *fg);
643 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
644 void check_filter_outputs(void);
645 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
646 int filtergraph_is_simple(FilterGraph *fg);
647 int init_simple_filtergraph(InputStream *ist, OutputStream *ost);
648 int init_complex_filtergraph(FilterGraph *fg);
650 void sub2video_update(InputStream *ist, AVSubtitle *sub);
652 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame);
654 int ffmpeg_parse_options(int argc, char **argv);
656 int vdpau_init(AVCodecContext *s);
657 int dxva2_init(AVCodecContext *s);
658 int vda_init(AVCodecContext *s);
659 int videotoolbox_init(AVCodecContext *s);
660 int qsv_init(AVCodecContext *s);
661 int vaapi_decode_init(AVCodecContext *avctx);
662 int vaapi_device_init(const char *device);
663 int cuvid_init(AVCodecContext *s);
665 #endif /* FFMPEG_H */