2 * This file is part of Libav.
4 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
33 #include "libavformat/avformat.h"
34 #include "libavformat/avio.h"
36 #include "libavcodec/avcodec.h"
38 #include "libavfilter/avfilter.h"
40 #include "libavutil/avutil.h"
41 #include "libavutil/dict.h"
42 #include "libavutil/fifo.h"
43 #include "libavutil/pixfmt.h"
44 #include "libavutil/rational.h"
47 #define VSYNC_PASSTHROUGH 0
51 /* select an input stream for an output stream */
52 typedef struct StreamMap {
53 int disabled; /* 1 is this mapping is disabled by a negative map */
57 int sync_stream_index;
58 char *linklabel; /* name of an output link, for mapping lavfi outputs */
61 /* select an input file for an output file */
62 typedef struct MetadataMap {
63 int file; // file index
64 char type; // type of metadata to copy -- (g)lobal, (s)tream, (c)hapter or (p)rogram
65 int index; // stream/chapter/program number
68 typedef struct OptionsContext {
71 /* input/output options */
75 SpecifierOpt *codec_names;
77 SpecifierOpt *audio_channels;
78 int nb_audio_channels;
79 SpecifierOpt *audio_sample_rate;
80 int nb_audio_sample_rate;
81 SpecifierOpt *frame_rates;
83 SpecifierOpt *frame_sizes;
85 SpecifierOpt *frame_pix_fmts;
86 int nb_frame_pix_fmts;
89 int64_t input_ts_offset;
93 SpecifierOpt *ts_scale;
95 SpecifierOpt *dump_attachment;
96 int nb_dump_attachment;
99 StreamMap *stream_maps;
101 /* first item specifies output metadata, second is input */
102 MetadataMap (*meta_data_maps)[2];
103 int nb_meta_data_maps;
104 int metadata_global_manual;
105 int metadata_streams_manual;
106 int metadata_chapters_manual;
107 const char **attachments;
110 int chapters_input_file;
112 int64_t recording_time;
113 uint64_t limit_filesize;
120 int subtitle_disable;
123 /* indexed by output file stream index */
127 SpecifierOpt *metadata;
129 SpecifierOpt *max_frames;
131 SpecifierOpt *bitstream_filters;
132 int nb_bitstream_filters;
133 SpecifierOpt *codec_tags;
135 SpecifierOpt *sample_fmts;
137 SpecifierOpt *qscale;
139 SpecifierOpt *forced_key_frames;
140 int nb_forced_key_frames;
141 SpecifierOpt *force_fps;
143 SpecifierOpt *frame_aspect_ratios;
144 int nb_frame_aspect_ratios;
145 SpecifierOpt *rc_overrides;
147 SpecifierOpt *intra_matrices;
148 int nb_intra_matrices;
149 SpecifierOpt *inter_matrices;
150 int nb_inter_matrices;
151 SpecifierOpt *top_field_first;
152 int nb_top_field_first;
153 SpecifierOpt *metadata_map;
155 SpecifierOpt *presets;
157 SpecifierOpt *copy_initial_nonkeyframes;
158 int nb_copy_initial_nonkeyframes;
159 SpecifierOpt *filters;
161 SpecifierOpt *filter_scripts;
162 int nb_filter_scripts;
165 SpecifierOpt *passlogfiles;
169 typedef struct InputFilter {
170 AVFilterContext *filter;
171 struct InputStream *ist;
172 struct FilterGraph *graph;
176 typedef struct OutputFilter {
177 AVFilterContext *filter;
178 struct OutputStream *ost;
179 struct FilterGraph *graph;
182 /* temporary storage until stream maps are processed */
183 AVFilterInOut *out_tmp;
186 typedef struct FilterGraph {
188 const char *graph_desc;
190 AVFilterGraph *graph;
192 InputFilter **inputs;
194 OutputFilter **outputs;
198 typedef struct InputStream {
201 int discard; /* true if stream data should be discarded */
202 int decoding_needed; /* true if the packets must be decoded in 'raw_fifo' */
204 AVFrame *decoded_frame;
205 AVFrame *filter_frame; /* a ref of decoded_frame, to be sent to filters */
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 */
211 /* dts of the last packet read for this stream */
213 PtsCorrectionContext pts_ctx;
215 int is_start; /* is 1 at the start and after a discontinuity */
216 int showed_multi_packet_warning;
218 AVRational framerate; /* framerate forced with -r */
222 int resample_pix_fmt;
224 int resample_sample_fmt;
225 int resample_sample_rate;
226 int resample_channels;
227 uint64_t resample_channel_layout;
229 /* decoded data from this stream goes into all those filters
230 * currently video and audio only */
231 InputFilter **filters;
235 typedef struct InputFile {
236 AVFormatContext *ctx;
237 int eof_reached; /* true if eof reached */
238 int eagain; /* true if last read attempt returned EAGAIN */
239 int ist_index; /* index of first stream in ist_table */
241 int64_t start_time; /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
242 int64_t recording_time;
243 int nb_streams; /* number of stream that avconv is aware of; may be different
244 from ctx.nb_streams if new streams appear during av_read_frame() */
249 pthread_t thread; /* thread reading from this file */
250 int finished; /* the thread has exited */
251 int joined; /* the thread has been joined */
252 pthread_mutex_t fifo_lock; /* lock for access to fifo */
253 pthread_cond_t fifo_cond; /* the main thread will signal on this cond after reading from fifo */
254 AVFifoBuffer *fifo; /* demuxed packets are stored here; freed by the main thread */
258 typedef struct OutputStream {
259 int file_index; /* file index */
260 int index; /* stream index in the output file */
261 int source_index; /* InputStream index */
262 AVStream *st; /* stream in the output file */
263 int encoding_needed; /* true if encoding needed for this stream */
265 /* input pts and corresponding output pts
267 // double sync_ipts; /* dts from the AVPacket of the demuxer in second units */
268 struct InputStream *sync_ist; /* input stream to sync against */
269 int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
270 /* pts of the first frame encoded for this stream, used for limiting
273 /* dts of the last packet sent to the muxer */
274 int64_t last_mux_dts;
275 AVBitStreamFilterContext *bitstream_filters;
278 AVFrame *filtered_frame;
281 AVRational frame_rate;
285 float frame_aspect_ratio;
287 /* forced key frames */
288 int64_t *forced_kf_pts;
291 char *forced_keyframes;
293 char *logfile_prefix;
296 OutputFilter *filter;
301 AVDictionary *resample_opts;
302 int finished; /* no more packets should be written for this stream */
304 const char *attachment_filename;
305 int copy_initial_nonkeyframes;
307 enum AVPixelFormat pix_fmts[2];
309 AVCodecParserContext *parser;
312 typedef struct OutputFile {
313 AVFormatContext *ctx;
315 int ost_index; /* index of the first stream in output_streams */
316 int64_t recording_time; /* desired length of the resulting file in microseconds */
317 int64_t start_time; /* start time in microseconds */
318 uint64_t limit_filesize;
323 extern InputStream **input_streams;
324 extern int nb_input_streams;
325 extern InputFile **input_files;
326 extern int nb_input_files;
328 extern OutputStream **output_streams;
329 extern int nb_output_streams;
330 extern OutputFile **output_files;
331 extern int nb_output_files;
333 extern FilterGraph **filtergraphs;
334 extern int nb_filtergraphs;
336 extern char *vstats_filename;
338 extern float audio_drift_threshold;
339 extern float dts_delta_threshold;
341 extern int audio_volume;
342 extern int audio_sync_method;
343 extern int video_sync_method;
344 extern int do_benchmark;
345 extern int do_deinterlace;
346 extern int do_hex_dump;
347 extern int do_pkt_dump;
350 extern int exit_on_error;
351 extern int print_stats;
354 extern const AVIOInterruptCB int_cb;
356 extern const OptionDef options[];
358 void reset_options(OptionsContext *o);
359 void show_usage(void);
361 void opt_output_file(void *optctx, const char *filename);
363 void assert_avoptions(AVDictionary *m);
365 int guess_input_channel_layout(InputStream *ist);
367 int configure_filtergraph(FilterGraph *fg);
368 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
369 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
370 FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost);
372 int avconv_parse_options(int argc, char **argv);
374 #endif /* AVCONV_H */