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;
231 typedef struct InputFilter {
232 AVFilterContext *filter;
233 struct InputStream *ist;
234 struct FilterGraph *graph;
236 enum AVMediaType type; // AVMEDIA_TYPE_SUBTITLE for sub2video
238 AVFifoBuffer *frame_queue;
240 // parameters configured for this input
244 AVRational sample_aspect_ratio;
248 uint64_t channel_layout;
250 AVBufferRef *hw_frames_ctx;
255 typedef struct OutputFilter {
256 AVFilterContext *filter;
257 struct OutputStream *ost;
258 struct FilterGraph *graph;
261 /* temporary storage until stream maps are processed */
262 AVFilterInOut *out_tmp;
263 enum AVMediaType type;
265 /* desired output stream properties */
267 AVRational frame_rate;
270 uint64_t channel_layout;
272 // those are only set if no format is specified and the encoder gives us multiple options
274 uint64_t *channel_layouts;
278 typedef struct FilterGraph {
280 const char *graph_desc;
282 AVFilterGraph *graph;
285 InputFilter **inputs;
287 OutputFilter **outputs;
291 typedef struct InputStream {
294 int discard; /* true if stream data should be discarded */
295 int user_set_discard;
296 int decoding_needed; /* non zero if the packets must be decoded in 'raw_fifo', see DECODING_FOR_* */
297 #define DECODING_FOR_OST 1
298 #define DECODING_FOR_FILTER 2
300 AVCodecContext *dec_ctx;
302 AVFrame *decoded_frame;
303 AVFrame *filter_frame; /* a ref of decoded_frame, to be sent to filters */
305 int64_t start; /* time when read started */
306 /* predicted dts of the next packet read for this stream or (when there are
307 * several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */
309 int64_t dts; ///< dts of the last packet read for this stream (in AV_TIME_BASE units)
311 int64_t next_pts; ///< synthetic pts for the next decode frame (in AV_TIME_BASE units)
312 int64_t pts; ///< current pts of the decoded frame (in AV_TIME_BASE units)
313 int wrap_correction_done;
315 int64_t filter_in_rescale_delta_last;
317 int64_t min_pts; /* pts with the smallest value in a current stream */
318 int64_t max_pts; /* pts with the higher value in a current stream */
320 // when forcing constant input framerate through -r,
321 // this contains the pts that will be given to the next decoded frame
322 int64_t cfr_next_pts;
324 int64_t nb_samples; /* number of samples in the last decoded audio frame before looping */
328 AVDictionary *decoder_opts;
329 AVRational framerate; /* framerate forced with -r */
331 int guess_layout_max;
335 int fix_sub_duration;
336 struct { /* previous decoded subtitle and related variables */
345 AVFifoBuffer *sub_queue; ///< queue of AVSubtitle* before filter init
352 /* decoded data from this stream goes into all those filters
353 * currently video and audio only */
354 InputFilter **filters;
359 /* hwaccel options */
360 enum HWAccelID hwaccel_id;
361 char *hwaccel_device;
362 enum AVPixelFormat hwaccel_output_format;
364 /* hwaccel context */
365 enum HWAccelID active_hwaccel_id;
367 void (*hwaccel_uninit)(AVCodecContext *s);
368 int (*hwaccel_get_buffer)(AVCodecContext *s, AVFrame *frame, int flags);
369 int (*hwaccel_retrieve_data)(AVCodecContext *s, AVFrame *frame);
370 enum AVPixelFormat hwaccel_pix_fmt;
371 enum AVPixelFormat hwaccel_retrieved_pix_fmt;
372 AVBufferRef *hw_frames_ctx;
375 // combined size of all the packets read
377 /* number of packets successfully read for this stream */
379 // number of frames/samples retrieved from the decoder
380 uint64_t frames_decoded;
381 uint64_t samples_decoded;
389 typedef struct InputFile {
390 AVFormatContext *ctx;
391 int eof_reached; /* true if eof reached */
392 int eagain; /* true if last read attempt returned EAGAIN */
393 int ist_index; /* index of first stream in input_streams */
394 int loop; /* set number of times input stream should be looped */
395 int64_t duration; /* actual duration of the longest stream in a file
396 at the moment when looping happens */
397 AVRational time_base; /* time base of the duration */
398 int64_t input_ts_offset;
402 int64_t start_time; /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
404 int64_t recording_time;
405 int nb_streams; /* number of stream that ffmpeg is aware of; may be different
406 from ctx.nb_streams if new streams appear during av_read_frame() */
407 int nb_streams_warn; /* number of streams that the user was warned of */
412 AVThreadMessageQueue *in_thread_queue;
413 pthread_t thread; /* thread reading from this file */
414 int non_blocking; /* reading packets from the thread should not block */
415 int joined; /* the thread has been joined */
416 int thread_queue_size; /* maximum number of queued packets */
420 enum forced_keyframes_const {
429 #define ABORT_ON_FLAG_EMPTY_OUTPUT (1 << 0)
431 extern const char *const forced_keyframes_const_names[];
434 ENCODER_FINISHED = 1,
438 typedef struct OutputStream {
439 int file_index; /* file index */
440 int index; /* stream index in the output file */
441 int source_index; /* InputStream index */
442 AVStream *st; /* stream in the output file */
443 int encoding_needed; /* true if encoding needed for this stream */
445 /* input pts and corresponding output pts
447 struct InputStream *sync_ist; /* input stream to sync against */
448 int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
449 /* pts of the first frame encoded for this stream, used for limiting
452 /* dts of the last packet sent to the muxer */
453 int64_t last_mux_dts;
454 // the timebase of the packets sent to the muxer
455 AVRational mux_timebase;
457 int nb_bitstream_filters;
458 uint8_t *bsf_extradata_updated;
459 AVBSFContext **bsf_ctx;
461 AVCodecContext *enc_ctx;
462 AVCodecParameters *ref_par; /* associated input codec parameters with encoders options applied */
465 AVFrame *filtered_frame;
468 int last_nb0_frames[3];
473 AVRational frame_rate;
477 int rotate_overridden;
479 AVRational frame_aspect_ratio;
481 /* forced key frames */
482 int64_t *forced_kf_pts;
485 char *forced_keyframes;
486 AVExpr *forced_keyframes_pexpr;
487 double forced_keyframes_expr_const_values[FKF_NB];
490 int *audio_channels_map; /* list of the channels id to pick from the source stream */
491 int audio_channels_mapped; /* number of channels in audio_channels_map */
493 char *logfile_prefix;
496 OutputFilter *filter;
498 char *filters; ///< filtergraph associated to the -filter option
499 char *filters_script; ///< filtergraph script associated to the -filter_script option
501 AVDictionary *encoder_opts;
502 AVDictionary *sws_dict;
503 AVDictionary *swr_opts;
504 AVDictionary *resample_opts;
506 OSTFinished finished; /* no more packets should be written for this stream */
507 int unavailable; /* true if the steram is unavailable (possibly temporarily) */
510 // init_output_stream() has been called for this stream
511 // The encoder and the bitstream filters have been initialized and the stream
512 // parameters are set in the AVStream.
517 const char *attachment_filename;
518 int copy_initial_nonkeyframes;
519 int copy_prior_start;
524 AVCodecParserContext *parser;
525 AVCodecContext *parser_avctx;
528 // combined size of all the packets written
530 // number of packets send to the muxer
531 uint64_t packets_written;
532 // number of frames/samples sent to the encoder
533 uint64_t frames_encoded;
534 uint64_t samples_encoded;
536 /* packet quality factor */
539 int max_muxing_queue_size;
541 /* the packets are buffered here until the muxer is ready to be initialized */
542 AVFifoBuffer *muxing_queue;
544 /* packet picture type */
547 /* frame encode sum of squared error values */
551 typedef struct OutputFile {
552 AVFormatContext *ctx;
554 int ost_index; /* index of the first stream in output_streams */
555 int64_t recording_time; ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
556 int64_t start_time; ///< start time in microseconds == AV_TIME_BASE units
557 uint64_t limit_filesize; /* filesize limit expressed in bytes */
564 extern InputStream **input_streams;
565 extern int nb_input_streams;
566 extern InputFile **input_files;
567 extern int nb_input_files;
569 extern OutputStream **output_streams;
570 extern int nb_output_streams;
571 extern OutputFile **output_files;
572 extern int nb_output_files;
574 extern FilterGraph **filtergraphs;
575 extern int nb_filtergraphs;
577 extern char *vstats_filename;
578 extern char *sdp_filename;
580 extern float audio_drift_threshold;
581 extern float dts_delta_threshold;
582 extern float dts_error_threshold;
584 extern int audio_volume;
585 extern int audio_sync_method;
586 extern int video_sync_method;
587 extern float frame_drop_threshold;
588 extern int do_benchmark;
589 extern int do_benchmark_all;
590 extern int do_deinterlace;
591 extern int do_hex_dump;
592 extern int do_pkt_dump;
594 extern int start_at_zero;
597 extern int exit_on_error;
598 extern int abort_on_flags;
599 extern int print_stats;
601 extern int stdin_interaction;
602 extern int frame_bits_per_raw_sample;
603 extern AVIOContext *progress_avio;
604 extern float max_error_rate;
605 extern char *videotoolbox_pixfmt;
607 extern int filter_nbthreads;
608 extern int filter_complex_nbthreads;
609 extern int vstats_version;
611 extern const AVIOInterruptCB int_cb;
613 extern const OptionDef options[];
614 extern const HWAccel hwaccels[];
615 extern int hwaccel_lax_profile_check;
616 extern AVBufferRef *hw_device_ctx;
618 extern char *qsv_device;
622 void term_init(void);
623 void term_exit(void);
625 void reset_options(OptionsContext *o, int is_input);
626 void show_usage(void);
628 void opt_output_file(void *optctx, const char *filename);
630 void remove_avoptions(AVDictionary **a, AVDictionary *b);
631 void assert_avoptions(AVDictionary *m);
633 int guess_input_channel_layout(InputStream *ist);
635 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *avctx, AVCodec *codec, enum AVPixelFormat target);
636 void choose_sample_fmt(AVStream *st, AVCodec *codec);
638 int configure_filtergraph(FilterGraph *fg);
639 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
640 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
641 int filtergraph_is_simple(FilterGraph *fg);
642 int init_simple_filtergraph(InputStream *ist, OutputStream *ost);
643 int init_complex_filtergraph(FilterGraph *fg);
645 void sub2video_update(InputStream *ist, AVSubtitle *sub);
647 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame);
649 int ffmpeg_parse_options(int argc, char **argv);
651 int vdpau_init(AVCodecContext *s);
652 int dxva2_init(AVCodecContext *s);
653 int vda_init(AVCodecContext *s);
654 int videotoolbox_init(AVCodecContext *s);
655 int qsv_init(AVCodecContext *s);
656 int vaapi_decode_init(AVCodecContext *avctx);
657 int vaapi_device_init(const char *device);
658 int cuvid_init(AVCodecContext *s);
660 #endif /* FFMPEG_H */