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"
40 #include "libavfilter/avfiltergraph.h"
42 #include "libavutil/avutil.h"
43 #include "libavutil/dict.h"
44 #include "libavutil/fifo.h"
45 #include "libavutil/pixfmt.h"
46 #include "libavutil/rational.h"
48 #include "libswresample/swresample.h"
51 #define VSYNC_PASSTHROUGH 0
54 #define VSYNC_DROP 0xff
56 #define MAX_STREAMS 1024 /* arbitrary sanity check value */
58 /* select an input stream for an output stream */
59 typedef struct StreamMap {
60 int disabled; /** 1 is this mapping is disabled by a negative map */
64 int sync_stream_index;
65 char *linklabel; /** name of an output link, for mapping lavfi outputs */
69 int file_idx, stream_idx, channel_idx; // input
70 int ofile_idx, ostream_idx; // output
73 typedef struct OptionsContext {
74 /* input/output options */
78 SpecifierOpt *codec_names;
80 SpecifierOpt *audio_channels;
81 int nb_audio_channels;
82 SpecifierOpt *audio_sample_rate;
83 int nb_audio_sample_rate;
84 SpecifierOpt *frame_rates;
86 SpecifierOpt *frame_sizes;
88 SpecifierOpt *frame_pix_fmts;
89 int nb_frame_pix_fmts;
92 int64_t input_ts_offset;
95 SpecifierOpt *ts_scale;
97 SpecifierOpt *dump_attachment;
98 int nb_dump_attachment;
101 StreamMap *stream_maps;
103 AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */
104 int nb_audio_channel_maps; /* number of (valid) -map_channel settings */
105 int metadata_global_manual;
106 int metadata_streams_manual;
107 int metadata_chapters_manual;
108 const char **attachments;
111 int chapters_input_file;
113 int64_t recording_time;
114 uint64_t limit_filesize;
121 int subtitle_disable;
124 /* indexed by output file stream index */
128 SpecifierOpt *metadata;
130 SpecifierOpt *max_frames;
132 SpecifierOpt *bitstream_filters;
133 int nb_bitstream_filters;
134 SpecifierOpt *codec_tags;
136 SpecifierOpt *sample_fmts;
138 SpecifierOpt *qscale;
140 SpecifierOpt *forced_key_frames;
141 int nb_forced_key_frames;
142 SpecifierOpt *force_fps;
144 SpecifierOpt *frame_aspect_ratios;
145 int nb_frame_aspect_ratios;
146 SpecifierOpt *rc_overrides;
148 SpecifierOpt *intra_matrices;
149 int nb_intra_matrices;
150 SpecifierOpt *inter_matrices;
151 int nb_inter_matrices;
152 SpecifierOpt *top_field_first;
153 int nb_top_field_first;
154 SpecifierOpt *metadata_map;
156 SpecifierOpt *presets;
158 SpecifierOpt *copy_initial_nonkeyframes;
159 int nb_copy_initial_nonkeyframes;
160 SpecifierOpt *filters;
162 SpecifierOpt *fix_sub_duration;
163 int nb_fix_sub_duration;
166 SpecifierOpt *passlogfiles;
170 typedef struct InputFilter {
171 AVFilterContext *filter;
172 struct InputStream *ist;
173 struct FilterGraph *graph;
177 typedef struct OutputFilter {
178 AVFilterContext *filter;
179 struct OutputStream *ost;
180 struct FilterGraph *graph;
183 /* temporary storage until stream maps are processed */
184 AVFilterInOut *out_tmp;
187 typedef struct FilterGraph {
189 const char *graph_desc;
191 AVFilterGraph *graph;
193 InputFilter **inputs;
195 OutputFilter **outputs;
199 typedef struct InputStream {
202 int discard; /* true if stream data should be discarded */
203 int decoding_needed; /* true if the packets must be decoded in 'raw_fifo' */
205 AVFrame *decoded_frame;
207 int64_t start; /* time when read started */
208 /* predicted dts of the next packet read for this stream or (when there are
209 * several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */
211 int64_t dts; ///< dts of the last packet read for this stream (in AV_TIME_BASE units)
213 int64_t next_pts; ///< synthetic pts for the next decode frame (in AV_TIME_BASE units)
214 int64_t pts; ///< current pts of the decoded frame (in AV_TIME_BASE units)
215 int wrap_correction_done;
217 int is_start; /* is 1 at the start and after a discontinuity */
219 int showed_multi_packet_warning;
221 AVRational framerate; /* framerate forced with -r */
226 int resample_pix_fmt;
228 int resample_sample_fmt;
229 int resample_sample_rate;
230 int resample_channels;
231 uint64_t resample_channel_layout;
233 int fix_sub_duration;
234 struct { /* previous decoded subtitle and related variables */
242 AVFilterBufferRef *ref;
246 /* a pool of free buffers for decoded data */
247 FrameBuffer *buffer_pool;
250 /* decoded data from this stream goes into all those filters
251 * currently video and audio only */
252 InputFilter **filters;
256 typedef struct InputFile {
257 AVFormatContext *ctx;
258 int eof_reached; /* true if eof reached */
259 int eagain; /* true if last read attempt returned EAGAIN */
260 int ist_index; /* index of first stream in input_streams */
262 int nb_streams; /* number of stream that ffmpeg is aware of; may be different
263 from ctx.nb_streams if new streams appear during av_read_frame() */
264 int nb_streams_warn; /* number of streams that the user was warned of */
268 pthread_t thread; /* thread reading from this file */
269 int finished; /* the thread has exited */
270 int joined; /* the thread has been joined */
271 pthread_mutex_t fifo_lock; /* lock for access to fifo */
272 pthread_cond_t fifo_cond; /* the main thread will signal on this cond after reading from fifo */
273 AVFifoBuffer *fifo; /* demuxed packets are stored here; freed by the main thread */
277 typedef struct OutputStream {
278 int file_index; /* file index */
279 int index; /* stream index in the output file */
280 int source_index; /* InputStream index */
281 AVStream *st; /* stream in the output file */
282 int encoding_needed; /* true if encoding needed for this stream */
284 /* input pts and corresponding output pts
286 struct InputStream *sync_ist; /* input stream to sync against */
287 int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
288 /* pts of the first frame encoded for this stream, used for limiting
291 AVBitStreamFilterContext *bitstream_filters;
294 AVFrame *filtered_frame;
297 AVRational frame_rate;
301 float frame_aspect_ratio;
304 /* forced key frames */
305 int64_t *forced_kf_pts;
308 char *forced_keyframes;
311 int audio_channels_map[SWR_CH_MAX]; /* list of the channels id to pick from the source stream */
312 int audio_channels_mapped; /* number of channels in audio_channels_map */
314 char *logfile_prefix;
317 OutputFilter *filter;
321 int64_t swr_dither_method;
322 double swr_dither_scale;
324 int finished; /* no more packets should be written for this stream */
325 int unavailable; /* true if the steram is unavailable (possibly temporarily) */
327 const char *attachment_filename;
328 int copy_initial_nonkeyframes;
333 typedef struct OutputFile {
334 AVFormatContext *ctx;
336 int ost_index; /* index of the first stream in output_streams */
337 int64_t recording_time; ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
338 int64_t start_time; ///< start time in microseconds == AV_TIME_BASE units
339 uint64_t limit_filesize; /* filesize limit expressed in bytes */
344 extern InputStream **input_streams;
345 extern int nb_input_streams;
346 extern InputFile **input_files;
347 extern int nb_input_files;
349 extern OutputStream **output_streams;
350 extern int nb_output_streams;
351 extern OutputFile **output_files;
352 extern int nb_output_files;
354 extern FilterGraph **filtergraphs;
355 extern int nb_filtergraphs;
357 extern char *vstats_filename;
359 extern float audio_drift_threshold;
360 extern float dts_delta_threshold;
361 extern float dts_error_threshold;
363 extern int audio_volume;
364 extern int audio_sync_method;
365 extern int video_sync_method;
366 extern int do_benchmark;
367 extern int do_benchmark_all;
368 extern int do_deinterlace;
369 extern int do_hex_dump;
370 extern int do_pkt_dump;
374 extern int exit_on_error;
375 extern int print_stats;
377 extern int same_quant;
378 extern int stdin_interaction;
379 extern int frame_bits_per_raw_sample;
380 extern AVIOContext *progress_avio;
382 extern const AVIOInterruptCB int_cb;
384 extern const OptionDef options[];
386 void term_init(void);
387 void term_exit(void);
389 void reset_options(OptionsContext *o, int is_input);
390 void show_usage(void);
392 void opt_output_file(void *optctx, const char *filename);
394 void assert_avoptions(AVDictionary *m);
396 int guess_input_channel_layout(InputStream *ist);
398 enum PixelFormat choose_pixel_fmt(AVStream *st, AVCodec *codec, enum PixelFormat target);
399 void choose_sample_fmt(AVStream *st, AVCodec *codec);
401 int configure_filtergraph(FilterGraph *fg);
402 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
403 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
404 FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost);
406 #endif /* FFMPEG_H */