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 */
319 int64_t nb_samples; /* number of samples in the last decoded audio frame before looping */
323 AVDictionary *decoder_opts;
324 AVRational framerate; /* framerate forced with -r */
326 int guess_layout_max;
330 int fix_sub_duration;
331 struct { /* previous decoded subtitle and related variables */
340 AVFifoBuffer *sub_queue; ///< queue of AVSubtitle* before filter init
347 /* decoded data from this stream goes into all those filters
348 * currently video and audio only */
349 InputFilter **filters;
354 /* hwaccel options */
355 enum HWAccelID hwaccel_id;
356 char *hwaccel_device;
357 enum AVPixelFormat hwaccel_output_format;
359 /* hwaccel context */
360 enum HWAccelID active_hwaccel_id;
362 void (*hwaccel_uninit)(AVCodecContext *s);
363 int (*hwaccel_get_buffer)(AVCodecContext *s, AVFrame *frame, int flags);
364 int (*hwaccel_retrieve_data)(AVCodecContext *s, AVFrame *frame);
365 enum AVPixelFormat hwaccel_pix_fmt;
366 enum AVPixelFormat hwaccel_retrieved_pix_fmt;
367 AVBufferRef *hw_frames_ctx;
370 // combined size of all the packets read
372 /* number of packets successfully read for this stream */
374 // number of frames/samples retrieved from the decoder
375 uint64_t frames_decoded;
376 uint64_t samples_decoded;
384 typedef struct InputFile {
385 AVFormatContext *ctx;
386 int eof_reached; /* true if eof reached */
387 int eagain; /* true if last read attempt returned EAGAIN */
388 int ist_index; /* index of first stream in input_streams */
389 int loop; /* set number of times input stream should be looped */
390 int64_t duration; /* actual duration of the longest stream in a file
391 at the moment when looping happens */
392 AVRational time_base; /* time base of the duration */
393 int64_t input_ts_offset;
397 int64_t start_time; /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
399 int64_t recording_time;
400 int nb_streams; /* number of stream that ffmpeg is aware of; may be different
401 from ctx.nb_streams if new streams appear during av_read_frame() */
402 int nb_streams_warn; /* number of streams that the user was warned of */
407 AVThreadMessageQueue *in_thread_queue;
408 pthread_t thread; /* thread reading from this file */
409 int non_blocking; /* reading packets from the thread should not block */
410 int joined; /* the thread has been joined */
411 int thread_queue_size; /* maximum number of queued packets */
415 enum forced_keyframes_const {
424 #define ABORT_ON_FLAG_EMPTY_OUTPUT (1 << 0)
426 extern const char *const forced_keyframes_const_names[];
429 ENCODER_FINISHED = 1,
433 typedef struct OutputStream {
434 int file_index; /* file index */
435 int index; /* stream index in the output file */
436 int source_index; /* InputStream index */
437 AVStream *st; /* stream in the output file */
438 int encoding_needed; /* true if encoding needed for this stream */
440 /* input pts and corresponding output pts
442 struct InputStream *sync_ist; /* input stream to sync against */
443 int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
444 /* pts of the first frame encoded for this stream, used for limiting
447 /* dts of the last packet sent to the muxer */
448 int64_t last_mux_dts;
449 // the timebase of the packets sent to the muxer
450 AVRational mux_timebase;
452 int nb_bitstream_filters;
453 uint8_t *bsf_extradata_updated;
454 AVBSFContext **bsf_ctx;
456 AVCodecContext *enc_ctx;
457 AVCodecParameters *ref_par; /* associated input codec parameters with encoders options applied */
460 AVFrame *filtered_frame;
463 int last_nb0_frames[3];
468 AVRational frame_rate;
472 int rotate_overridden;
474 AVRational frame_aspect_ratio;
476 /* forced key frames */
477 int64_t *forced_kf_pts;
480 char *forced_keyframes;
481 AVExpr *forced_keyframes_pexpr;
482 double forced_keyframes_expr_const_values[FKF_NB];
485 int *audio_channels_map; /* list of the channels id to pick from the source stream */
486 int audio_channels_mapped; /* number of channels in audio_channels_map */
488 char *logfile_prefix;
491 OutputFilter *filter;
493 char *filters; ///< filtergraph associated to the -filter option
494 char *filters_script; ///< filtergraph script associated to the -filter_script option
496 AVDictionary *encoder_opts;
497 AVDictionary *sws_dict;
498 AVDictionary *swr_opts;
499 AVDictionary *resample_opts;
501 OSTFinished finished; /* no more packets should be written for this stream */
502 int unavailable; /* true if the steram is unavailable (possibly temporarily) */
505 // init_output_stream() has been called for this stream
506 // The encoder and the bitstream filters have been initialized and the stream
507 // parameters are set in the AVStream.
512 const char *attachment_filename;
513 int copy_initial_nonkeyframes;
514 int copy_prior_start;
519 AVCodecParserContext *parser;
520 AVCodecContext *parser_avctx;
523 // combined size of all the packets written
525 // number of packets send to the muxer
526 uint64_t packets_written;
527 // number of frames/samples sent to the encoder
528 uint64_t frames_encoded;
529 uint64_t samples_encoded;
531 /* packet quality factor */
534 int max_muxing_queue_size;
536 /* the packets are buffered here until the muxer is ready to be initialized */
537 AVFifoBuffer *muxing_queue;
539 /* packet picture type */
542 /* frame encode sum of squared error values */
546 typedef struct OutputFile {
547 AVFormatContext *ctx;
549 int ost_index; /* index of the first stream in output_streams */
550 int64_t recording_time; ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
551 int64_t start_time; ///< start time in microseconds == AV_TIME_BASE units
552 uint64_t limit_filesize; /* filesize limit expressed in bytes */
559 extern InputStream **input_streams;
560 extern int nb_input_streams;
561 extern InputFile **input_files;
562 extern int nb_input_files;
564 extern OutputStream **output_streams;
565 extern int nb_output_streams;
566 extern OutputFile **output_files;
567 extern int nb_output_files;
569 extern FilterGraph **filtergraphs;
570 extern int nb_filtergraphs;
572 extern char *vstats_filename;
573 extern char *sdp_filename;
575 extern float audio_drift_threshold;
576 extern float dts_delta_threshold;
577 extern float dts_error_threshold;
579 extern int audio_volume;
580 extern int audio_sync_method;
581 extern int video_sync_method;
582 extern float frame_drop_threshold;
583 extern int do_benchmark;
584 extern int do_benchmark_all;
585 extern int do_deinterlace;
586 extern int do_hex_dump;
587 extern int do_pkt_dump;
589 extern int start_at_zero;
592 extern int exit_on_error;
593 extern int abort_on_flags;
594 extern int print_stats;
596 extern int stdin_interaction;
597 extern int frame_bits_per_raw_sample;
598 extern AVIOContext *progress_avio;
599 extern float max_error_rate;
600 extern char *videotoolbox_pixfmt;
602 extern int filter_nbthreads;
603 extern int filter_complex_nbthreads;
604 extern int vstats_version;
606 extern const AVIOInterruptCB int_cb;
608 extern const OptionDef options[];
609 extern const HWAccel hwaccels[];
610 extern int hwaccel_lax_profile_check;
611 extern AVBufferRef *hw_device_ctx;
613 extern char *qsv_device;
617 void term_init(void);
618 void term_exit(void);
620 void reset_options(OptionsContext *o, int is_input);
621 void show_usage(void);
623 void opt_output_file(void *optctx, const char *filename);
625 void remove_avoptions(AVDictionary **a, AVDictionary *b);
626 void assert_avoptions(AVDictionary *m);
628 int guess_input_channel_layout(InputStream *ist);
630 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *avctx, AVCodec *codec, enum AVPixelFormat target);
631 void choose_sample_fmt(AVStream *st, AVCodec *codec);
633 int configure_filtergraph(FilterGraph *fg);
634 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
635 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
636 int filtergraph_is_simple(FilterGraph *fg);
637 int init_simple_filtergraph(InputStream *ist, OutputStream *ost);
638 int init_complex_filtergraph(FilterGraph *fg);
640 void sub2video_update(InputStream *ist, AVSubtitle *sub);
642 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame);
644 int ffmpeg_parse_options(int argc, char **argv);
646 int vdpau_init(AVCodecContext *s);
647 int dxva2_init(AVCodecContext *s);
648 int vda_init(AVCodecContext *s);
649 int videotoolbox_init(AVCodecContext *s);
650 int qsv_init(AVCodecContext *s);
651 int vaapi_decode_init(AVCodecContext *avctx);
652 int vaapi_device_init(const char *device);
653 int cuvid_init(AVCodecContext *s);
655 #endif /* FFMPEG_H */