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 */
68 typedef struct HWAccel {
70 int (*init)(AVCodecContext *s);
72 enum AVPixelFormat pix_fmt;
75 /* select an input stream for an output stream */
76 typedef struct StreamMap {
77 int disabled; /* 1 is this mapping is disabled by a negative map */
81 int sync_stream_index;
82 char *linklabel; /* name of an output link, for mapping lavfi outputs */
86 int file_idx, stream_idx, channel_idx; // input
87 int ofile_idx, ostream_idx; // output
90 typedef struct OptionsContext {
93 /* input/output options */
97 SpecifierOpt *codec_names;
99 SpecifierOpt *audio_channels;
100 int nb_audio_channels;
101 SpecifierOpt *audio_sample_rate;
102 int nb_audio_sample_rate;
103 SpecifierOpt *frame_rates;
105 SpecifierOpt *frame_sizes;
107 SpecifierOpt *frame_pix_fmts;
108 int nb_frame_pix_fmts;
111 int64_t input_ts_offset;
115 SpecifierOpt *ts_scale;
117 SpecifierOpt *dump_attachment;
118 int nb_dump_attachment;
119 SpecifierOpt *hwaccels;
121 SpecifierOpt *hwaccel_devices;
122 int nb_hwaccel_devices;
125 StreamMap *stream_maps;
127 AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */
128 int nb_audio_channel_maps; /* number of (valid) -map_channel settings */
129 int metadata_global_manual;
130 int metadata_streams_manual;
131 int metadata_chapters_manual;
132 const char **attachments;
135 int chapters_input_file;
137 int64_t recording_time;
139 uint64_t limit_filesize;
146 int subtitle_disable;
149 /* indexed by output file stream index */
153 SpecifierOpt *metadata;
155 SpecifierOpt *max_frames;
157 SpecifierOpt *bitstream_filters;
158 int nb_bitstream_filters;
159 SpecifierOpt *codec_tags;
161 SpecifierOpt *sample_fmts;
163 SpecifierOpt *qscale;
165 SpecifierOpt *forced_key_frames;
166 int nb_forced_key_frames;
167 SpecifierOpt *force_fps;
169 SpecifierOpt *frame_aspect_ratios;
170 int nb_frame_aspect_ratios;
171 SpecifierOpt *rc_overrides;
173 SpecifierOpt *intra_matrices;
174 int nb_intra_matrices;
175 SpecifierOpt *inter_matrices;
176 int nb_inter_matrices;
177 SpecifierOpt *chroma_intra_matrices;
178 int nb_chroma_intra_matrices;
179 SpecifierOpt *top_field_first;
180 int nb_top_field_first;
181 SpecifierOpt *metadata_map;
183 SpecifierOpt *presets;
185 SpecifierOpt *copy_initial_nonkeyframes;
186 int nb_copy_initial_nonkeyframes;
187 SpecifierOpt *copy_prior_start;
188 int nb_copy_prior_start;
189 SpecifierOpt *filters;
191 SpecifierOpt *filter_scripts;
192 int nb_filter_scripts;
193 SpecifierOpt *reinit_filters;
194 int nb_reinit_filters;
195 SpecifierOpt *fix_sub_duration;
196 int nb_fix_sub_duration;
197 SpecifierOpt *canvas_sizes;
201 SpecifierOpt *passlogfiles;
203 SpecifierOpt *guess_layout_max;
204 int nb_guess_layout_max;
207 SpecifierOpt *discard;
211 typedef struct InputFilter {
212 AVFilterContext *filter;
213 struct InputStream *ist;
214 struct FilterGraph *graph;
218 typedef struct OutputFilter {
219 AVFilterContext *filter;
220 struct OutputStream *ost;
221 struct FilterGraph *graph;
224 /* temporary storage until stream maps are processed */
225 AVFilterInOut *out_tmp;
228 typedef struct FilterGraph {
230 const char *graph_desc;
232 AVFilterGraph *graph;
235 InputFilter **inputs;
237 OutputFilter **outputs;
241 typedef struct InputStream {
244 int discard; /* true if stream data should be discarded */
245 int user_set_discard;
246 int decoding_needed; /* non zero if the packets must be decoded in 'raw_fifo', see DECODING_FOR_* */
247 #define DECODING_FOR_OST 1
248 #define DECODING_FOR_FILTER 2
250 AVCodecContext *dec_ctx;
252 AVFrame *decoded_frame;
253 AVFrame *filter_frame; /* a ref of decoded_frame, to be sent to filters */
255 int64_t start; /* time when read started */
256 /* predicted dts of the next packet read for this stream or (when there are
257 * several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */
259 int64_t dts; ///< dts of the last packet read for this stream (in AV_TIME_BASE units)
261 int64_t next_pts; ///< synthetic pts for the next decode frame (in AV_TIME_BASE units)
262 int64_t pts; ///< current pts of the decoded frame (in AV_TIME_BASE units)
263 int wrap_correction_done;
265 int64_t filter_in_rescale_delta_last;
269 int showed_multi_packet_warning;
270 AVDictionary *decoder_opts;
271 AVRational framerate; /* framerate forced with -r */
273 int guess_layout_max;
277 int resample_pix_fmt;
279 int resample_sample_fmt;
280 int resample_sample_rate;
281 int resample_channels;
282 uint64_t resample_channel_layout;
284 int fix_sub_duration;
285 struct { /* previous decoded subtitle and related variables */
300 /* decoded data from this stream goes into all those filters
301 * currently video and audio only */
302 InputFilter **filters;
307 /* hwaccel options */
308 enum HWAccelID hwaccel_id;
309 char *hwaccel_device;
311 /* hwaccel context */
312 enum HWAccelID active_hwaccel_id;
314 void (*hwaccel_uninit)(AVCodecContext *s);
315 int (*hwaccel_get_buffer)(AVCodecContext *s, AVFrame *frame, int flags);
316 int (*hwaccel_retrieve_data)(AVCodecContext *s, AVFrame *frame);
317 enum AVPixelFormat hwaccel_pix_fmt;
318 enum AVPixelFormat hwaccel_retrieved_pix_fmt;
321 // combined size of all the packets read
323 /* number of packets successfully read for this stream */
325 // number of frames/samples retrieved from the decoder
326 uint64_t frames_decoded;
327 uint64_t samples_decoded;
330 typedef struct InputFile {
331 AVFormatContext *ctx;
332 int eof_reached; /* true if eof reached */
333 int eagain; /* true if last read attempt returned EAGAIN */
334 int ist_index; /* index of first stream in input_streams */
335 int64_t input_ts_offset;
338 int64_t start_time; /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
339 int64_t recording_time;
340 int nb_streams; /* number of stream that ffmpeg is aware of; may be different
341 from ctx.nb_streams if new streams appear during av_read_frame() */
342 int nb_streams_warn; /* number of streams that the user was warned of */
347 AVThreadMessageQueue *in_thread_queue;
348 pthread_t thread; /* thread reading from this file */
349 int non_blocking; /* reading packets from the thread should not block */
350 int joined; /* the thread has been joined */
354 enum forced_keyframes_const {
363 extern const char *const forced_keyframes_const_names[];
366 ENCODER_FINISHED = 1,
370 typedef struct OutputStream {
371 int file_index; /* file index */
372 int index; /* stream index in the output file */
373 int source_index; /* InputStream index */
374 AVStream *st; /* stream in the output file */
375 int encoding_needed; /* true if encoding needed for this stream */
377 /* input pts and corresponding output pts
379 struct InputStream *sync_ist; /* input stream to sync against */
380 int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
381 /* pts of the first frame encoded for this stream, used for limiting
384 /* dts of the last packet sent to the muxer */
385 int64_t last_mux_dts;
386 AVBitStreamFilterContext *bitstream_filters;
387 AVCodecContext *enc_ctx;
390 AVFrame *filtered_frame;
395 AVRational frame_rate;
399 AVRational frame_aspect_ratio;
401 /* forced key frames */
402 int64_t *forced_kf_pts;
405 char *forced_keyframes;
406 AVExpr *forced_keyframes_pexpr;
407 double forced_keyframes_expr_const_values[FKF_NB];
410 int *audio_channels_map; /* list of the channels id to pick from the source stream */
411 int audio_channels_mapped; /* number of channels in audio_channels_map */
413 char *logfile_prefix;
416 OutputFilter *filter;
418 char *filters; ///< filtergraph associated to the -filter option
419 char *filters_script; ///< filtergraph script associated to the -filter_script option
422 AVDictionary *encoder_opts;
423 AVDictionary *swr_opts;
424 AVDictionary *resample_opts;
426 OSTFinished finished; /* no more packets should be written for this stream */
427 int unavailable; /* true if the steram is unavailable (possibly temporarily) */
429 const char *attachment_filename;
430 int copy_initial_nonkeyframes;
431 int copy_prior_start;
435 AVCodecParserContext *parser;
438 // combined size of all the packets written
440 // number of packets send to the muxer
441 uint64_t packets_written;
442 // number of frames/samples sent to the encoder
443 uint64_t frames_encoded;
444 uint64_t samples_encoded;
447 typedef struct OutputFile {
448 AVFormatContext *ctx;
450 int ost_index; /* index of the first stream in output_streams */
451 int64_t recording_time; ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
452 int64_t start_time; ///< start time in microseconds == AV_TIME_BASE units
453 uint64_t limit_filesize; /* filesize limit expressed in bytes */
458 extern InputStream **input_streams;
459 extern int nb_input_streams;
460 extern InputFile **input_files;
461 extern int nb_input_files;
463 extern OutputStream **output_streams;
464 extern int nb_output_streams;
465 extern OutputFile **output_files;
466 extern int nb_output_files;
468 extern FilterGraph **filtergraphs;
469 extern int nb_filtergraphs;
471 extern char *vstats_filename;
473 extern float audio_drift_threshold;
474 extern float dts_delta_threshold;
475 extern float dts_error_threshold;
477 extern int audio_volume;
478 extern int audio_sync_method;
479 extern int video_sync_method;
480 extern int do_benchmark;
481 extern int do_benchmark_all;
482 extern int do_deinterlace;
483 extern int do_hex_dump;
484 extern int do_pkt_dump;
486 extern int start_at_zero;
489 extern int exit_on_error;
490 extern int print_stats;
492 extern int stdin_interaction;
493 extern int frame_bits_per_raw_sample;
494 extern AVIOContext *progress_avio;
495 extern float max_error_rate;
496 extern int vdpau_api_ver;
498 extern const AVIOInterruptCB int_cb;
500 extern const OptionDef options[];
501 extern const HWAccel hwaccels[];
504 void term_init(void);
505 void term_exit(void);
507 void reset_options(OptionsContext *o, int is_input);
508 void show_usage(void);
510 void opt_output_file(void *optctx, const char *filename);
512 void remove_avoptions(AVDictionary **a, AVDictionary *b);
513 void assert_avoptions(AVDictionary *m);
515 int guess_input_channel_layout(InputStream *ist);
517 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *avctx, AVCodec *codec, enum AVPixelFormat target);
518 void choose_sample_fmt(AVStream *st, AVCodec *codec);
520 int configure_filtergraph(FilterGraph *fg);
521 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
522 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
523 FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost);
525 int ffmpeg_parse_options(int argc, char **argv);
527 int vdpau_init(AVCodecContext *s);
528 int dxva2_init(AVCodecContext *s);
529 int vda_init(AVCodecContext *s);
531 #endif /* FFMPEG_H */