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"
39 #include "libavfilter/avfiltergraph.h"
41 #include "libavutil/avutil.h"
42 #include "libavutil/dict.h"
43 #include "libavutil/fifo.h"
44 #include "libavutil/pixfmt.h"
45 #include "libavutil/rational.h"
48 #define VSYNC_PASSTHROUGH 0
52 /* select an input stream for an output stream */
53 typedef struct StreamMap {
54 int disabled; /** 1 is this mapping is disabled by a negative map */
58 int sync_stream_index;
59 char *linklabel; /** name of an output link, for mapping lavfi outputs */
63 * select an input file for an output file
65 typedef struct MetadataMap {
66 int file; ///< file index
67 char type; ///< type of metadata to copy -- (g)lobal, (s)tream, (c)hapter or (p)rogram
68 int index; ///< stream/chapter/program number
71 typedef struct OptionsContext {
72 /* input/output options */
76 SpecifierOpt *codec_names;
78 SpecifierOpt *audio_channels;
79 int nb_audio_channels;
80 SpecifierOpt *audio_sample_rate;
81 int nb_audio_sample_rate;
82 SpecifierOpt *frame_rates;
84 SpecifierOpt *frame_sizes;
86 SpecifierOpt *frame_pix_fmts;
87 int nb_frame_pix_fmts;
90 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;
119 int subtitle_disable;
122 /* indexed by output file stream index */
126 SpecifierOpt *metadata;
128 SpecifierOpt *max_frames;
130 SpecifierOpt *bitstream_filters;
131 int nb_bitstream_filters;
132 SpecifierOpt *codec_tags;
134 SpecifierOpt *sample_fmts;
136 SpecifierOpt *qscale;
138 SpecifierOpt *forced_key_frames;
139 int nb_forced_key_frames;
140 SpecifierOpt *force_fps;
142 SpecifierOpt *frame_aspect_ratios;
143 int nb_frame_aspect_ratios;
144 SpecifierOpt *rc_overrides;
146 SpecifierOpt *intra_matrices;
147 int nb_intra_matrices;
148 SpecifierOpt *inter_matrices;
149 int nb_inter_matrices;
150 SpecifierOpt *top_field_first;
151 int nb_top_field_first;
152 SpecifierOpt *metadata_map;
154 SpecifierOpt *presets;
156 SpecifierOpt *copy_initial_nonkeyframes;
157 int nb_copy_initial_nonkeyframes;
158 SpecifierOpt *filters;
162 typedef struct InputFilter {
163 AVFilterContext *filter;
164 struct InputStream *ist;
165 struct FilterGraph *graph;
169 typedef struct OutputFilter {
170 AVFilterContext *filter;
171 struct OutputStream *ost;
172 struct FilterGraph *graph;
175 /* temporary storage until stream maps are processed */
176 AVFilterInOut *out_tmp;
179 typedef struct FilterGraph {
181 const char *graph_desc;
183 AVFilterGraph *graph;
185 InputFilter **inputs;
187 OutputFilter **outputs;
191 typedef struct InputStream {
194 int discard; /* true if stream data should be discarded */
195 int decoding_needed; /* true if the packets must be decoded in 'raw_fifo' */
197 AVFrame *decoded_frame;
199 int64_t start; /* time when read started */
200 /* predicted dts of the next packet read for this stream or (when there are
201 * several frames in a packet) of the next frame in current packet */
203 /* dts of the last packet read for this stream */
205 PtsCorrectionContext pts_ctx;
207 int is_start; /* is 1 at the start and after a discontinuity */
208 int showed_multi_packet_warning;
210 AVRational framerate; /* framerate forced with -r */
214 int resample_pix_fmt;
216 int resample_sample_fmt;
217 int resample_sample_rate;
218 int resample_channels;
219 uint64_t resample_channel_layout;
221 /* a pool of free buffers for decoded data */
222 FrameBuffer *buffer_pool;
224 /* decoded data from this stream goes into all those filters
225 * currently video and audio only */
226 InputFilter **filters;
230 typedef struct InputFile {
231 AVFormatContext *ctx;
232 int eof_reached; /* true if eof reached */
233 int eagain; /* true if last read attempt returned EAGAIN */
234 int ist_index; /* index of first stream in ist_table */
236 int nb_streams; /* number of stream that avconv is aware of; may be different
237 from ctx.nb_streams if new streams appear during av_read_frame() */
241 pthread_t thread; /* thread reading from this file */
242 int finished; /* the thread has exited */
243 int joined; /* the thread has been joined */
244 pthread_mutex_t fifo_lock; /* lock for access to fifo */
245 pthread_cond_t fifo_cond; /* the main thread will signal on this cond after reading from fifo */
246 AVFifoBuffer *fifo; /* demuxed packets are stored here; freed by the main thread */
250 typedef struct OutputStream {
251 int file_index; /* file index */
252 int index; /* stream index in the output file */
253 int source_index; /* InputStream index */
254 AVStream *st; /* stream in the output file */
255 int encoding_needed; /* true if encoding needed for this stream */
257 /* input pts and corresponding output pts
259 // double sync_ipts; /* dts from the AVPacket of the demuxer in second units */
260 struct InputStream *sync_ist; /* input stream to sync against */
261 int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
262 /* pts of the first frame encoded for this stream, used for limiting
265 AVBitStreamFilterContext *bitstream_filters;
268 AVFrame *filtered_frame;
271 AVRational frame_rate;
275 float frame_aspect_ratio;
278 /* forced key frames */
279 int64_t *forced_kf_pts;
282 char *forced_keyframes;
286 OutputFilter *filter;
291 int finished; /* no more packets should be written for this stream */
293 const char *attachment_filename;
294 int copy_initial_nonkeyframes;
296 enum PixelFormat pix_fmts[2];
299 typedef struct OutputFile {
300 AVFormatContext *ctx;
302 int ost_index; /* index of the first stream in output_streams */
303 int64_t recording_time; /* desired length of the resulting file in microseconds */
304 int64_t start_time; /* start time in microseconds */
305 uint64_t limit_filesize;
308 extern InputStream **input_streams;
309 extern int nb_input_streams;
310 extern InputFile **input_files;
311 extern int nb_input_files;
313 extern OutputStream **output_streams;
314 extern int nb_output_streams;
315 extern OutputFile **output_files;
316 extern int nb_output_files;
318 extern FilterGraph **filtergraphs;
319 extern int nb_filtergraphs;
321 extern char *pass_logfilename_prefix;
322 extern char *vstats_filename;
324 extern float audio_drift_threshold;
325 extern float dts_delta_threshold;
327 extern int audio_volume;
328 extern int audio_sync_method;
329 extern int video_sync_method;
330 extern int do_benchmark;
331 extern int do_deinterlace;
332 extern int do_hex_dump;
333 extern int do_pkt_dump;
336 extern int opt_shortest;
337 extern int exit_on_error;
338 extern int print_stats;
340 extern int same_quant;
342 extern const AVIOInterruptCB int_cb;
344 extern const OptionDef options[];
346 void reset_options(OptionsContext *o);
347 void show_usage(void);
349 int opt_cpuflags(const char *opt, const char *arg);
351 void opt_output_file(void *optctx, const char *filename);
353 void assert_avoptions(AVDictionary *m);
355 int guess_input_channel_layout(InputStream *ist);
357 int configure_filtergraph(FilterGraph *fg);
358 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
359 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
360 FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost);
362 #endif /* AVCONV_H */