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/hwcontext.h"
46 #include "libavutil/pixfmt.h"
47 #include "libavutil/rational.h"
48 #include "libavutil/threadmessage.h"
50 #include "libswresample/swresample.h"
53 #define VSYNC_PASSTHROUGH 0
56 #define VSYNC_VSCFR 0xfe
57 #define VSYNC_DROP 0xff
59 #define MAX_STREAMS 1024 /* arbitrary sanity check value */
73 typedef struct HWAccel {
75 int (*init)(AVCodecContext *s);
77 enum AVPixelFormat pix_fmt;
78 enum AVHWDeviceType device_type;
81 typedef struct HWDevice {
83 enum AVHWDeviceType type;
84 AVBufferRef *device_ref;
87 /* select an input stream for an output stream */
88 typedef struct StreamMap {
89 int disabled; /* 1 is this mapping is disabled by a negative map */
93 int sync_stream_index;
94 char *linklabel; /* name of an output link, for mapping lavfi outputs */
98 int file_idx, stream_idx, channel_idx; // input
99 int ofile_idx, ostream_idx; // output
102 typedef struct OptionsContext {
105 /* input/output options */
107 int64_t start_time_eof;
111 SpecifierOpt *codec_names;
113 SpecifierOpt *audio_channels;
114 int nb_audio_channels;
115 SpecifierOpt *audio_sample_rate;
116 int nb_audio_sample_rate;
117 SpecifierOpt *frame_rates;
119 SpecifierOpt *frame_sizes;
121 SpecifierOpt *frame_pix_fmts;
122 int nb_frame_pix_fmts;
125 int64_t input_ts_offset;
129 int thread_queue_size;
131 SpecifierOpt *ts_scale;
133 SpecifierOpt *dump_attachment;
134 int nb_dump_attachment;
135 SpecifierOpt *hwaccels;
137 SpecifierOpt *hwaccel_devices;
138 int nb_hwaccel_devices;
139 SpecifierOpt *hwaccel_output_formats;
140 int nb_hwaccel_output_formats;
141 SpecifierOpt *autorotate;
145 StreamMap *stream_maps;
147 AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */
148 int nb_audio_channel_maps; /* number of (valid) -map_channel settings */
149 int metadata_global_manual;
150 int metadata_streams_manual;
151 int metadata_chapters_manual;
152 const char **attachments;
155 int chapters_input_file;
157 int64_t recording_time;
159 uint64_t limit_filesize;
166 int subtitle_disable;
169 /* indexed by output file stream index */
173 SpecifierOpt *metadata;
175 SpecifierOpt *max_frames;
177 SpecifierOpt *bitstream_filters;
178 int nb_bitstream_filters;
179 SpecifierOpt *codec_tags;
181 SpecifierOpt *sample_fmts;
183 SpecifierOpt *qscale;
185 SpecifierOpt *forced_key_frames;
186 int nb_forced_key_frames;
187 SpecifierOpt *force_fps;
189 SpecifierOpt *frame_aspect_ratios;
190 int nb_frame_aspect_ratios;
191 SpecifierOpt *rc_overrides;
193 SpecifierOpt *intra_matrices;
194 int nb_intra_matrices;
195 SpecifierOpt *inter_matrices;
196 int nb_inter_matrices;
197 SpecifierOpt *chroma_intra_matrices;
198 int nb_chroma_intra_matrices;
199 SpecifierOpt *top_field_first;
200 int nb_top_field_first;
201 SpecifierOpt *metadata_map;
203 SpecifierOpt *presets;
205 SpecifierOpt *copy_initial_nonkeyframes;
206 int nb_copy_initial_nonkeyframes;
207 SpecifierOpt *copy_prior_start;
208 int nb_copy_prior_start;
209 SpecifierOpt *filters;
211 SpecifierOpt *filter_scripts;
212 int nb_filter_scripts;
213 SpecifierOpt *reinit_filters;
214 int nb_reinit_filters;
215 SpecifierOpt *fix_sub_duration;
216 int nb_fix_sub_duration;
217 SpecifierOpt *canvas_sizes;
221 SpecifierOpt *passlogfiles;
223 SpecifierOpt *max_muxing_queue_size;
224 int nb_max_muxing_queue_size;
225 SpecifierOpt *guess_layout_max;
226 int nb_guess_layout_max;
229 SpecifierOpt *discard;
231 SpecifierOpt *disposition;
233 SpecifierOpt *program;
235 SpecifierOpt *time_bases;
237 SpecifierOpt *enc_time_bases;
238 int nb_enc_time_bases;
241 typedef struct InputFilter {
242 AVFilterContext *filter;
243 struct InputStream *ist;
244 struct FilterGraph *graph;
246 enum AVMediaType type; // AVMEDIA_TYPE_SUBTITLE for sub2video
248 AVFifoBuffer *frame_queue;
250 // parameters configured for this input
254 AVRational sample_aspect_ratio;
258 uint64_t channel_layout;
260 AVBufferRef *hw_frames_ctx;
265 typedef struct OutputFilter {
266 AVFilterContext *filter;
267 struct OutputStream *ost;
268 struct FilterGraph *graph;
271 /* temporary storage until stream maps are processed */
272 AVFilterInOut *out_tmp;
273 enum AVMediaType type;
275 /* desired output stream properties */
277 AVRational frame_rate;
280 uint64_t channel_layout;
282 // those are only set if no format is specified and the encoder gives us multiple options
284 uint64_t *channel_layouts;
288 typedef struct FilterGraph {
290 const char *graph_desc;
292 AVFilterGraph *graph;
295 InputFilter **inputs;
297 OutputFilter **outputs;
301 typedef struct InputStream {
304 int discard; /* true if stream data should be discarded */
305 int user_set_discard;
306 int decoding_needed; /* non zero if the packets must be decoded in 'raw_fifo', see DECODING_FOR_* */
307 #define DECODING_FOR_OST 1
308 #define DECODING_FOR_FILTER 2
310 AVCodecContext *dec_ctx;
312 AVFrame *decoded_frame;
313 AVFrame *filter_frame; /* a ref of decoded_frame, to be sent to filters */
315 int64_t start; /* time when read started */
316 /* predicted dts of the next packet read for this stream or (when there are
317 * several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */
319 int64_t dts; ///< dts of the last packet read for this stream (in AV_TIME_BASE units)
321 int64_t next_pts; ///< synthetic pts for the next decode frame (in AV_TIME_BASE units)
322 int64_t pts; ///< current pts of the decoded frame (in AV_TIME_BASE units)
323 int wrap_correction_done;
325 int64_t filter_in_rescale_delta_last;
327 int64_t min_pts; /* pts with the smallest value in a current stream */
328 int64_t max_pts; /* pts with the higher value in a current stream */
330 // when forcing constant input framerate through -r,
331 // this contains the pts that will be given to the next decoded frame
332 int64_t cfr_next_pts;
334 int64_t nb_samples; /* number of samples in the last decoded audio frame before looping */
338 AVDictionary *decoder_opts;
339 AVRational framerate; /* framerate forced with -r */
341 int guess_layout_max;
345 int fix_sub_duration;
346 struct { /* previous decoded subtitle and related variables */
355 AVFifoBuffer *sub_queue; ///< queue of AVSubtitle* before filter init
362 /* decoded data from this stream goes into all those filters
363 * currently video and audio only */
364 InputFilter **filters;
369 /* hwaccel options */
370 enum HWAccelID hwaccel_id;
371 char *hwaccel_device;
372 enum AVPixelFormat hwaccel_output_format;
374 /* hwaccel context */
375 enum HWAccelID active_hwaccel_id;
377 void (*hwaccel_uninit)(AVCodecContext *s);
378 int (*hwaccel_get_buffer)(AVCodecContext *s, AVFrame *frame, int flags);
379 int (*hwaccel_retrieve_data)(AVCodecContext *s, AVFrame *frame);
380 enum AVPixelFormat hwaccel_pix_fmt;
381 enum AVPixelFormat hwaccel_retrieved_pix_fmt;
382 AVBufferRef *hw_frames_ctx;
385 // combined size of all the packets read
387 /* number of packets successfully read for this stream */
389 // number of frames/samples retrieved from the decoder
390 uint64_t frames_decoded;
391 uint64_t samples_decoded;
399 typedef struct InputFile {
400 AVFormatContext *ctx;
401 int eof_reached; /* true if eof reached */
402 int eagain; /* true if last read attempt returned EAGAIN */
403 int ist_index; /* index of first stream in input_streams */
404 int loop; /* set number of times input stream should be looped */
405 int64_t duration; /* actual duration of the longest stream in a file
406 at the moment when looping happens */
407 AVRational time_base; /* time base of the duration */
408 int64_t input_ts_offset;
412 int64_t start_time; /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
414 int64_t recording_time;
415 int nb_streams; /* number of stream that ffmpeg is aware of; may be different
416 from ctx.nb_streams if new streams appear during av_read_frame() */
417 int nb_streams_warn; /* number of streams that the user was warned of */
422 AVThreadMessageQueue *in_thread_queue;
423 pthread_t thread; /* thread reading from this file */
424 int non_blocking; /* reading packets from the thread should not block */
425 int joined; /* the thread has been joined */
426 int thread_queue_size; /* maximum number of queued packets */
430 enum forced_keyframes_const {
439 #define ABORT_ON_FLAG_EMPTY_OUTPUT (1 << 0)
441 extern const char *const forced_keyframes_const_names[];
444 ENCODER_FINISHED = 1,
448 typedef struct OutputStream {
449 int file_index; /* file index */
450 int index; /* stream index in the output file */
451 int source_index; /* InputStream index */
452 AVStream *st; /* stream in the output file */
453 int encoding_needed; /* true if encoding needed for this stream */
455 /* input pts and corresponding output pts
457 struct InputStream *sync_ist; /* input stream to sync against */
458 int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
459 /* pts of the first frame encoded for this stream, used for limiting
462 /* dts of the last packet sent to the muxer */
463 int64_t last_mux_dts;
464 // the timebase of the packets sent to the muxer
465 AVRational mux_timebase;
466 AVRational enc_timebase;
468 int nb_bitstream_filters;
469 AVBSFContext **bsf_ctx;
471 AVCodecContext *enc_ctx;
472 AVCodecParameters *ref_par; /* associated input codec parameters with encoders options applied */
475 AVFrame *filtered_frame;
478 int last_nb0_frames[3];
483 AVRational frame_rate;
487 int rotate_overridden;
488 double rotate_override_value;
490 AVRational frame_aspect_ratio;
492 /* forced key frames */
493 int64_t *forced_kf_pts;
496 char *forced_keyframes;
497 AVExpr *forced_keyframes_pexpr;
498 double forced_keyframes_expr_const_values[FKF_NB];
501 int *audio_channels_map; /* list of the channels id to pick from the source stream */
502 int audio_channels_mapped; /* number of channels in audio_channels_map */
504 char *logfile_prefix;
507 OutputFilter *filter;
509 char *filters; ///< filtergraph associated to the -filter option
510 char *filters_script; ///< filtergraph script associated to the -filter_script option
512 AVDictionary *encoder_opts;
513 AVDictionary *sws_dict;
514 AVDictionary *swr_opts;
515 AVDictionary *resample_opts;
517 OSTFinished finished; /* no more packets should be written for this stream */
518 int unavailable; /* true if the steram is unavailable (possibly temporarily) */
521 // init_output_stream() has been called for this stream
522 // The encoder and the bitstream filters have been initialized and the stream
523 // parameters are set in the AVStream.
528 const char *attachment_filename;
529 int copy_initial_nonkeyframes;
530 int copy_prior_start;
535 AVCodecParserContext *parser;
536 AVCodecContext *parser_avctx;
539 // combined size of all the packets written
541 // number of packets send to the muxer
542 uint64_t packets_written;
543 // number of frames/samples sent to the encoder
544 uint64_t frames_encoded;
545 uint64_t samples_encoded;
547 /* packet quality factor */
550 int max_muxing_queue_size;
552 /* the packets are buffered here until the muxer is ready to be initialized */
553 AVFifoBuffer *muxing_queue;
555 /* packet picture type */
558 /* frame encode sum of squared error values */
562 typedef struct OutputFile {
563 AVFormatContext *ctx;
565 int ost_index; /* index of the first stream in output_streams */
566 int64_t recording_time; ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
567 int64_t start_time; ///< start time in microseconds == AV_TIME_BASE units
568 uint64_t limit_filesize; /* filesize limit expressed in bytes */
575 extern InputStream **input_streams;
576 extern int nb_input_streams;
577 extern InputFile **input_files;
578 extern int nb_input_files;
580 extern OutputStream **output_streams;
581 extern int nb_output_streams;
582 extern OutputFile **output_files;
583 extern int nb_output_files;
585 extern FilterGraph **filtergraphs;
586 extern int nb_filtergraphs;
588 extern char *vstats_filename;
589 extern char *sdp_filename;
591 extern float audio_drift_threshold;
592 extern float dts_delta_threshold;
593 extern float dts_error_threshold;
595 extern int audio_volume;
596 extern int audio_sync_method;
597 extern int video_sync_method;
598 extern float frame_drop_threshold;
599 extern int do_benchmark;
600 extern int do_benchmark_all;
601 extern int do_deinterlace;
602 extern int do_hex_dump;
603 extern int do_pkt_dump;
605 extern int start_at_zero;
608 extern int exit_on_error;
609 extern int abort_on_flags;
610 extern int print_stats;
612 extern int stdin_interaction;
613 extern int frame_bits_per_raw_sample;
614 extern AVIOContext *progress_avio;
615 extern float max_error_rate;
616 extern char *videotoolbox_pixfmt;
618 extern int filter_nbthreads;
619 extern int filter_complex_nbthreads;
620 extern int vstats_version;
622 extern const AVIOInterruptCB int_cb;
624 extern const OptionDef options[];
625 extern const HWAccel hwaccels[];
626 extern int hwaccel_lax_profile_check;
627 extern AVBufferRef *hw_device_ctx;
629 extern char *qsv_device;
631 extern HWDevice *filter_hw_device;
634 void term_init(void);
635 void term_exit(void);
637 void reset_options(OptionsContext *o, int is_input);
638 void show_usage(void);
640 void opt_output_file(void *optctx, const char *filename);
642 void remove_avoptions(AVDictionary **a, AVDictionary *b);
643 void assert_avoptions(AVDictionary *m);
645 int guess_input_channel_layout(InputStream *ist);
647 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *avctx, AVCodec *codec, enum AVPixelFormat target);
648 void choose_sample_fmt(AVStream *st, AVCodec *codec);
650 int configure_filtergraph(FilterGraph *fg);
651 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
652 void check_filter_outputs(void);
653 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
654 int filtergraph_is_simple(FilterGraph *fg);
655 int init_simple_filtergraph(InputStream *ist, OutputStream *ost);
656 int init_complex_filtergraph(FilterGraph *fg);
658 void sub2video_update(InputStream *ist, AVSubtitle *sub);
660 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame);
662 int ffmpeg_parse_options(int argc, char **argv);
664 int dxva2_init(AVCodecContext *s);
665 int vda_init(AVCodecContext *s);
666 int videotoolbox_init(AVCodecContext *s);
667 int qsv_init(AVCodecContext *s);
668 int cuvid_init(AVCodecContext *s);
670 HWDevice *hw_device_get_by_name(const char *name);
671 int hw_device_init_from_string(const char *arg, HWDevice **dev);
672 void hw_device_free_all(void);
674 int hw_device_setup_for_decode(InputStream *ist);
675 int hw_device_setup_for_encode(OutputStream *ost);
677 int hwaccel_decode_init(AVCodecContext *avctx);
679 #endif /* FFMPEG_H */