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 */
71 typedef struct HWAccel {
73 int (*init)(AVCodecContext *s);
75 enum AVPixelFormat pix_fmt;
78 /* select an input stream for an output stream */
79 typedef struct StreamMap {
80 int disabled; /* 1 is this mapping is disabled by a negative map */
84 int sync_stream_index;
85 char *linklabel; /* name of an output link, for mapping lavfi outputs */
89 int file_idx, stream_idx, channel_idx; // input
90 int ofile_idx, ostream_idx; // output
93 typedef struct OptionsContext {
96 /* input/output options */
98 int64_t start_time_eof;
102 SpecifierOpt *codec_names;
104 SpecifierOpt *audio_channels;
105 int nb_audio_channels;
106 SpecifierOpt *audio_sample_rate;
107 int nb_audio_sample_rate;
108 SpecifierOpt *frame_rates;
110 SpecifierOpt *frame_sizes;
112 SpecifierOpt *frame_pix_fmts;
113 int nb_frame_pix_fmts;
116 int64_t input_ts_offset;
120 int thread_queue_size;
122 SpecifierOpt *ts_scale;
124 SpecifierOpt *dump_attachment;
125 int nb_dump_attachment;
126 SpecifierOpt *hwaccels;
128 SpecifierOpt *hwaccel_devices;
129 int nb_hwaccel_devices;
130 SpecifierOpt *hwaccel_output_formats;
131 int nb_hwaccel_output_formats;
132 SpecifierOpt *autorotate;
136 StreamMap *stream_maps;
138 AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */
139 int nb_audio_channel_maps; /* number of (valid) -map_channel settings */
140 int metadata_global_manual;
141 int metadata_streams_manual;
142 int metadata_chapters_manual;
143 const char **attachments;
146 int chapters_input_file;
148 int64_t recording_time;
150 uint64_t limit_filesize;
157 int subtitle_disable;
160 /* indexed by output file stream index */
164 SpecifierOpt *metadata;
166 SpecifierOpt *max_frames;
168 SpecifierOpt *bitstream_filters;
169 int nb_bitstream_filters;
170 SpecifierOpt *codec_tags;
172 SpecifierOpt *sample_fmts;
174 SpecifierOpt *qscale;
176 SpecifierOpt *forced_key_frames;
177 int nb_forced_key_frames;
178 SpecifierOpt *force_fps;
180 SpecifierOpt *frame_aspect_ratios;
181 int nb_frame_aspect_ratios;
182 SpecifierOpt *rc_overrides;
184 SpecifierOpt *intra_matrices;
185 int nb_intra_matrices;
186 SpecifierOpt *inter_matrices;
187 int nb_inter_matrices;
188 SpecifierOpt *chroma_intra_matrices;
189 int nb_chroma_intra_matrices;
190 SpecifierOpt *top_field_first;
191 int nb_top_field_first;
192 SpecifierOpt *metadata_map;
194 SpecifierOpt *presets;
196 SpecifierOpt *copy_initial_nonkeyframes;
197 int nb_copy_initial_nonkeyframes;
198 SpecifierOpt *copy_prior_start;
199 int nb_copy_prior_start;
200 SpecifierOpt *filters;
202 SpecifierOpt *filter_scripts;
203 int nb_filter_scripts;
204 SpecifierOpt *reinit_filters;
205 int nb_reinit_filters;
206 SpecifierOpt *fix_sub_duration;
207 int nb_fix_sub_duration;
208 SpecifierOpt *canvas_sizes;
212 SpecifierOpt *passlogfiles;
214 SpecifierOpt *guess_layout_max;
215 int nb_guess_layout_max;
218 SpecifierOpt *discard;
220 SpecifierOpt *disposition;
222 SpecifierOpt *program;
226 typedef struct InputFilter {
227 AVFilterContext *filter;
228 struct InputStream *ist;
229 struct FilterGraph *graph;
233 typedef struct OutputFilter {
234 AVFilterContext *filter;
235 struct OutputStream *ost;
236 struct FilterGraph *graph;
239 /* temporary storage until stream maps are processed */
240 AVFilterInOut *out_tmp;
241 enum AVMediaType type;
244 typedef struct FilterGraph {
246 const char *graph_desc;
248 AVFilterGraph *graph;
251 InputFilter **inputs;
253 OutputFilter **outputs;
257 typedef struct InputStream {
260 int discard; /* true if stream data should be discarded */
261 int user_set_discard;
262 int decoding_needed; /* non zero if the packets must be decoded in 'raw_fifo', see DECODING_FOR_* */
263 #define DECODING_FOR_OST 1
264 #define DECODING_FOR_FILTER 2
266 AVCodecContext *dec_ctx;
268 AVFrame *decoded_frame;
269 AVFrame *filter_frame; /* a ref of decoded_frame, to be sent to filters */
271 int64_t start; /* time when read started */
272 /* predicted dts of the next packet read for this stream or (when there are
273 * several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */
275 int64_t dts; ///< dts of the last packet read for this stream (in AV_TIME_BASE units)
277 int64_t next_pts; ///< synthetic pts for the next decode frame (in AV_TIME_BASE units)
278 int64_t pts; ///< current pts of the decoded frame (in AV_TIME_BASE units)
279 int wrap_correction_done;
281 int64_t filter_in_rescale_delta_last;
283 int64_t min_pts; /* pts with the smallest value in a current stream */
284 int64_t max_pts; /* pts with the higher value in a current stream */
285 int64_t nb_samples; /* number of samples in the last decoded audio frame before looping */
289 int showed_multi_packet_warning;
290 AVDictionary *decoder_opts;
291 AVRational framerate; /* framerate forced with -r */
293 int guess_layout_max;
298 int resample_pix_fmt;
300 int resample_sample_fmt;
301 int resample_sample_rate;
302 int resample_channels;
303 uint64_t resample_channel_layout;
305 int fix_sub_duration;
306 struct { /* previous decoded subtitle and related variables */
321 /* decoded data from this stream goes into all those filters
322 * currently video and audio only */
323 InputFilter **filters;
328 /* hwaccel options */
329 enum HWAccelID hwaccel_id;
330 char *hwaccel_device;
331 enum AVPixelFormat hwaccel_output_format;
333 /* hwaccel context */
334 enum HWAccelID active_hwaccel_id;
336 void (*hwaccel_uninit)(AVCodecContext *s);
337 int (*hwaccel_get_buffer)(AVCodecContext *s, AVFrame *frame, int flags);
338 int (*hwaccel_retrieve_data)(AVCodecContext *s, AVFrame *frame);
339 enum AVPixelFormat hwaccel_pix_fmt;
340 enum AVPixelFormat hwaccel_retrieved_pix_fmt;
341 AVBufferRef *hw_frames_ctx;
344 // combined size of all the packets read
346 /* number of packets successfully read for this stream */
348 // number of frames/samples retrieved from the decoder
349 uint64_t frames_decoded;
350 uint64_t samples_decoded;
353 typedef struct InputFile {
354 AVFormatContext *ctx;
355 int eof_reached; /* true if eof reached */
356 int eagain; /* true if last read attempt returned EAGAIN */
357 int ist_index; /* index of first stream in input_streams */
358 int loop; /* set number of times input stream should be looped */
359 int64_t duration; /* actual duration of the longest stream in a file
360 at the moment when looping happens */
361 AVRational time_base; /* time base of the duration */
362 int64_t input_ts_offset;
366 int64_t start_time; /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
368 int64_t recording_time;
369 int nb_streams; /* number of stream that ffmpeg is aware of; may be different
370 from ctx.nb_streams if new streams appear during av_read_frame() */
371 int nb_streams_warn; /* number of streams that the user was warned of */
376 AVThreadMessageQueue *in_thread_queue;
377 pthread_t thread; /* thread reading from this file */
378 int non_blocking; /* reading packets from the thread should not block */
379 int joined; /* the thread has been joined */
380 int thread_queue_size; /* maximum number of queued packets */
384 enum forced_keyframes_const {
393 #define ABORT_ON_FLAG_EMPTY_OUTPUT (1 << 0)
395 extern const char *const forced_keyframes_const_names[];
398 ENCODER_FINISHED = 1,
402 typedef struct OutputStream {
403 int file_index; /* file index */
404 int index; /* stream index in the output file */
405 int source_index; /* InputStream index */
406 AVStream *st; /* stream in the output file */
407 int encoding_needed; /* true if encoding needed for this stream */
409 /* input pts and corresponding output pts
411 struct InputStream *sync_ist; /* input stream to sync against */
412 int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
413 /* pts of the first frame encoded for this stream, used for limiting
416 /* dts of the last packet sent to the muxer */
417 int64_t last_mux_dts;
418 AVBitStreamFilterContext *bitstream_filters;
419 AVCodecContext *enc_ctx;
422 AVFrame *filtered_frame;
425 int last_nb0_frames[3];
430 AVRational frame_rate;
434 int rotate_overridden;
436 AVRational frame_aspect_ratio;
438 /* forced key frames */
439 int64_t *forced_kf_pts;
442 char *forced_keyframes;
443 AVExpr *forced_keyframes_pexpr;
444 double forced_keyframes_expr_const_values[FKF_NB];
447 int *audio_channels_map; /* list of the channels id to pick from the source stream */
448 int audio_channels_mapped; /* number of channels in audio_channels_map */
450 char *logfile_prefix;
453 OutputFilter *filter;
455 char *filters; ///< filtergraph associated to the -filter option
456 char *filters_script; ///< filtergraph script associated to the -filter_script option
458 AVDictionary *encoder_opts;
459 AVDictionary *sws_dict;
460 AVDictionary *swr_opts;
461 AVDictionary *resample_opts;
463 OSTFinished finished; /* no more packets should be written for this stream */
464 int unavailable; /* true if the steram is unavailable (possibly temporarily) */
466 const char *attachment_filename;
467 int copy_initial_nonkeyframes;
468 int copy_prior_start;
473 AVCodecParserContext *parser;
476 // combined size of all the packets written
478 // number of packets send to the muxer
479 uint64_t packets_written;
480 // number of frames/samples sent to the encoder
481 uint64_t frames_encoded;
482 uint64_t samples_encoded;
484 /* packet quality factor */
487 /* packet picture type */
490 /* frame encode sum of squared error values */
494 typedef struct OutputFile {
495 AVFormatContext *ctx;
497 int ost_index; /* index of the first stream in output_streams */
498 int64_t recording_time; ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
499 int64_t start_time; ///< start time in microseconds == AV_TIME_BASE units
500 uint64_t limit_filesize; /* filesize limit expressed in bytes */
505 extern InputStream **input_streams;
506 extern int nb_input_streams;
507 extern InputFile **input_files;
508 extern int nb_input_files;
510 extern OutputStream **output_streams;
511 extern int nb_output_streams;
512 extern OutputFile **output_files;
513 extern int nb_output_files;
515 extern FilterGraph **filtergraphs;
516 extern int nb_filtergraphs;
518 extern char *vstats_filename;
519 extern char *sdp_filename;
521 extern float audio_drift_threshold;
522 extern float dts_delta_threshold;
523 extern float dts_error_threshold;
525 extern int audio_volume;
526 extern int audio_sync_method;
527 extern int video_sync_method;
528 extern float frame_drop_threshold;
529 extern int do_benchmark;
530 extern int do_benchmark_all;
531 extern int do_deinterlace;
532 extern int do_hex_dump;
533 extern int do_pkt_dump;
535 extern int start_at_zero;
538 extern int exit_on_error;
539 extern int abort_on_flags;
540 extern int print_stats;
542 extern int stdin_interaction;
543 extern int frame_bits_per_raw_sample;
544 extern AVIOContext *progress_avio;
545 extern float max_error_rate;
546 extern char *videotoolbox_pixfmt;
548 extern const AVIOInterruptCB int_cb;
550 extern const OptionDef options[];
551 extern const HWAccel hwaccels[];
552 extern int hwaccel_lax_profile_check;
553 extern AVBufferRef *hw_device_ctx;
556 void term_init(void);
557 void term_exit(void);
559 void reset_options(OptionsContext *o, int is_input);
560 void show_usage(void);
562 void opt_output_file(void *optctx, const char *filename);
564 void remove_avoptions(AVDictionary **a, AVDictionary *b);
565 void assert_avoptions(AVDictionary *m);
567 int guess_input_channel_layout(InputStream *ist);
569 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *avctx, AVCodec *codec, enum AVPixelFormat target);
570 void choose_sample_fmt(AVStream *st, AVCodec *codec);
572 int configure_filtergraph(FilterGraph *fg);
573 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
574 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
575 FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost);
576 int init_complex_filtergraph(FilterGraph *fg);
578 int ffmpeg_parse_options(int argc, char **argv);
580 int vdpau_init(AVCodecContext *s);
581 int dxva2_init(AVCodecContext *s);
582 int vda_init(AVCodecContext *s);
583 int videotoolbox_init(AVCodecContext *s);
584 int qsv_init(AVCodecContext *s);
585 int qsv_transcode_init(OutputStream *ost);
586 int vaapi_decode_init(AVCodecContext *avctx);
587 int vaapi_device_init(const char *device);
589 #endif /* FFMPEG_H */