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;
114 int thread_queue_size;
116 SpecifierOpt *ts_scale;
118 SpecifierOpt *dump_attachment;
119 int nb_dump_attachment;
120 SpecifierOpt *hwaccels;
122 SpecifierOpt *hwaccel_devices;
123 int nb_hwaccel_devices;
126 StreamMap *stream_maps;
128 AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */
129 int nb_audio_channel_maps; /* number of (valid) -map_channel settings */
130 int metadata_global_manual;
131 int metadata_streams_manual;
132 int metadata_chapters_manual;
133 const char **attachments;
136 int chapters_input_file;
138 int64_t recording_time;
140 uint64_t limit_filesize;
147 int subtitle_disable;
150 /* indexed by output file stream index */
154 SpecifierOpt *metadata;
156 SpecifierOpt *max_frames;
158 SpecifierOpt *bitstream_filters;
159 int nb_bitstream_filters;
160 SpecifierOpt *codec_tags;
162 SpecifierOpt *sample_fmts;
164 SpecifierOpt *qscale;
166 SpecifierOpt *forced_key_frames;
167 int nb_forced_key_frames;
168 SpecifierOpt *force_fps;
170 SpecifierOpt *frame_aspect_ratios;
171 int nb_frame_aspect_ratios;
172 SpecifierOpt *rc_overrides;
174 SpecifierOpt *intra_matrices;
175 int nb_intra_matrices;
176 SpecifierOpt *inter_matrices;
177 int nb_inter_matrices;
178 SpecifierOpt *chroma_intra_matrices;
179 int nb_chroma_intra_matrices;
180 SpecifierOpt *top_field_first;
181 int nb_top_field_first;
182 SpecifierOpt *metadata_map;
184 SpecifierOpt *presets;
186 SpecifierOpt *copy_initial_nonkeyframes;
187 int nb_copy_initial_nonkeyframes;
188 SpecifierOpt *copy_prior_start;
189 int nb_copy_prior_start;
190 SpecifierOpt *filters;
192 SpecifierOpt *filter_scripts;
193 int nb_filter_scripts;
194 SpecifierOpt *reinit_filters;
195 int nb_reinit_filters;
196 SpecifierOpt *fix_sub_duration;
197 int nb_fix_sub_duration;
198 SpecifierOpt *canvas_sizes;
202 SpecifierOpt *passlogfiles;
204 SpecifierOpt *guess_layout_max;
205 int nb_guess_layout_max;
208 SpecifierOpt *discard;
210 SpecifierOpt *disposition;
214 typedef struct InputFilter {
215 AVFilterContext *filter;
216 struct InputStream *ist;
217 struct FilterGraph *graph;
221 typedef struct OutputFilter {
222 AVFilterContext *filter;
223 struct OutputStream *ost;
224 struct FilterGraph *graph;
227 /* temporary storage until stream maps are processed */
228 AVFilterInOut *out_tmp;
231 typedef struct FilterGraph {
233 const char *graph_desc;
235 AVFilterGraph *graph;
238 InputFilter **inputs;
240 OutputFilter **outputs;
244 typedef struct InputStream {
247 int discard; /* true if stream data should be discarded */
248 int user_set_discard;
249 int decoding_needed; /* non zero if the packets must be decoded in 'raw_fifo', see DECODING_FOR_* */
250 #define DECODING_FOR_OST 1
251 #define DECODING_FOR_FILTER 2
253 AVCodecContext *dec_ctx;
255 AVFrame *decoded_frame;
256 AVFrame *filter_frame; /* a ref of decoded_frame, to be sent to filters */
258 int64_t start; /* time when read started */
259 /* predicted dts of the next packet read for this stream or (when there are
260 * several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */
262 int64_t dts; ///< dts of the last packet read for this stream (in AV_TIME_BASE units)
264 int64_t next_pts; ///< synthetic pts for the next decode frame (in AV_TIME_BASE units)
265 int64_t pts; ///< current pts of the decoded frame (in AV_TIME_BASE units)
266 int wrap_correction_done;
268 int64_t filter_in_rescale_delta_last;
272 int showed_multi_packet_warning;
273 AVDictionary *decoder_opts;
274 AVRational framerate; /* framerate forced with -r */
276 int guess_layout_max;
280 int resample_pix_fmt;
282 int resample_sample_fmt;
283 int resample_sample_rate;
284 int resample_channels;
285 uint64_t resample_channel_layout;
287 int fix_sub_duration;
288 struct { /* previous decoded subtitle and related variables */
303 /* decoded data from this stream goes into all those filters
304 * currently video and audio only */
305 InputFilter **filters;
310 /* hwaccel options */
311 enum HWAccelID hwaccel_id;
312 char *hwaccel_device;
314 /* hwaccel context */
315 enum HWAccelID active_hwaccel_id;
317 void (*hwaccel_uninit)(AVCodecContext *s);
318 int (*hwaccel_get_buffer)(AVCodecContext *s, AVFrame *frame, int flags);
319 int (*hwaccel_retrieve_data)(AVCodecContext *s, AVFrame *frame);
320 enum AVPixelFormat hwaccel_pix_fmt;
321 enum AVPixelFormat hwaccel_retrieved_pix_fmt;
324 // combined size of all the packets read
326 /* number of packets successfully read for this stream */
328 // number of frames/samples retrieved from the decoder
329 uint64_t frames_decoded;
330 uint64_t samples_decoded;
333 typedef struct InputFile {
334 AVFormatContext *ctx;
335 int eof_reached; /* true if eof reached */
336 int eagain; /* true if last read attempt returned EAGAIN */
337 int ist_index; /* index of first stream in input_streams */
338 int64_t input_ts_offset;
341 int64_t start_time; /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
342 int64_t recording_time;
343 int nb_streams; /* number of stream that ffmpeg is aware of; may be different
344 from ctx.nb_streams if new streams appear during av_read_frame() */
345 int nb_streams_warn; /* number of streams that the user was warned of */
350 AVThreadMessageQueue *in_thread_queue;
351 pthread_t thread; /* thread reading from this file */
352 int non_blocking; /* reading packets from the thread should not block */
353 int joined; /* the thread has been joined */
354 int thread_queue_size; /* maximum number of queued packets */
358 enum forced_keyframes_const {
367 extern const char *const forced_keyframes_const_names[];
370 ENCODER_FINISHED = 1,
374 typedef struct OutputStream {
375 int file_index; /* file index */
376 int index; /* stream index in the output file */
377 int source_index; /* InputStream index */
378 AVStream *st; /* stream in the output file */
379 int encoding_needed; /* true if encoding needed for this stream */
381 /* input pts and corresponding output pts
383 struct InputStream *sync_ist; /* input stream to sync against */
384 int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
385 /* pts of the first frame encoded for this stream, used for limiting
388 /* dts of the last packet sent to the muxer */
389 int64_t last_mux_dts;
390 AVBitStreamFilterContext *bitstream_filters;
391 AVCodecContext *enc_ctx;
394 AVFrame *filtered_frame;
399 AVRational frame_rate;
403 AVRational frame_aspect_ratio;
405 /* forced key frames */
406 int64_t *forced_kf_pts;
409 char *forced_keyframes;
410 AVExpr *forced_keyframes_pexpr;
411 double forced_keyframes_expr_const_values[FKF_NB];
414 int *audio_channels_map; /* list of the channels id to pick from the source stream */
415 int audio_channels_mapped; /* number of channels in audio_channels_map */
417 char *logfile_prefix;
420 OutputFilter *filter;
422 char *filters; ///< filtergraph associated to the -filter option
423 char *filters_script; ///< filtergraph script associated to the -filter_script option
426 AVDictionary *encoder_opts;
427 AVDictionary *swr_opts;
428 AVDictionary *resample_opts;
429 AVDictionary *bsf_args;
431 OSTFinished finished; /* no more packets should be written for this stream */
432 int unavailable; /* true if the steram is unavailable (possibly temporarily) */
434 const char *attachment_filename;
435 int copy_initial_nonkeyframes;
436 int copy_prior_start;
441 AVCodecParserContext *parser;
444 // combined size of all the packets written
446 // number of packets send to the muxer
447 uint64_t packets_written;
448 // number of frames/samples sent to the encoder
449 uint64_t frames_encoded;
450 uint64_t samples_encoded;
453 typedef struct OutputFile {
454 AVFormatContext *ctx;
456 int ost_index; /* index of the first stream in output_streams */
457 int64_t recording_time; ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
458 int64_t start_time; ///< start time in microseconds == AV_TIME_BASE units
459 uint64_t limit_filesize; /* filesize limit expressed in bytes */
464 extern InputStream **input_streams;
465 extern int nb_input_streams;
466 extern InputFile **input_files;
467 extern int nb_input_files;
469 extern OutputStream **output_streams;
470 extern int nb_output_streams;
471 extern OutputFile **output_files;
472 extern int nb_output_files;
474 extern FilterGraph **filtergraphs;
475 extern int nb_filtergraphs;
477 extern char *vstats_filename;
478 extern char *sdp_filename;
480 extern float audio_drift_threshold;
481 extern float dts_delta_threshold;
482 extern float dts_error_threshold;
484 extern int audio_volume;
485 extern int audio_sync_method;
486 extern int video_sync_method;
487 extern float frame_drop_threshold;
488 extern int do_benchmark;
489 extern int do_benchmark_all;
490 extern int do_deinterlace;
491 extern int do_hex_dump;
492 extern int do_pkt_dump;
494 extern int start_at_zero;
497 extern int exit_on_error;
498 extern int print_stats;
500 extern int stdin_interaction;
501 extern int frame_bits_per_raw_sample;
502 extern AVIOContext *progress_avio;
503 extern float max_error_rate;
504 extern int vdpau_api_ver;
506 extern const AVIOInterruptCB int_cb;
508 extern const OptionDef options[];
509 extern const HWAccel hwaccels[];
512 void term_init(void);
513 void term_exit(void);
515 void reset_options(OptionsContext *o, int is_input);
516 void show_usage(void);
518 void opt_output_file(void *optctx, const char *filename);
520 void remove_avoptions(AVDictionary **a, AVDictionary *b);
521 void assert_avoptions(AVDictionary *m);
523 int guess_input_channel_layout(InputStream *ist);
525 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *avctx, AVCodec *codec, enum AVPixelFormat target);
526 void choose_sample_fmt(AVStream *st, AVCodec *codec);
528 int configure_filtergraph(FilterGraph *fg);
529 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
530 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
531 FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost);
533 int ffmpeg_parse_options(int argc, char **argv);
535 int vdpau_init(AVCodecContext *s);
536 int dxva2_init(AVCodecContext *s);
537 int vda_init(AVCodecContext *s);
539 #endif /* FFMPEG_H */