/* * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef FFMPEG_H #define FFMPEG_H #include "config.h" #include <stdint.h> #include <stdio.h> #include <signal.h> #if HAVE_PTHREADS #include <pthread.h> #endif #include "cmdutils.h" #include "libavformat/avformat.h" #include "libavformat/avio.h" #include "libavcodec/avcodec.h" #include "libavfilter/avfilter.h" #include "libavutil/avutil.h" #include "libavutil/dict.h" #include "libavutil/eval.h" #include "libavutil/fifo.h" #include "libavutil/pixfmt.h" #include "libavutil/rational.h" #include "libswresample/swresample.h" #define VSYNC_AUTO -1 #define VSYNC_PASSTHROUGH 0 #define VSYNC_CFR 1 #define VSYNC_VFR 2 #define VSYNC_DROP 0xff #define MAX_STREAMS 1024 /* arbitrary sanity check value */ /* select an input stream for an output stream */ typedef struct StreamMap { int disabled; /* 1 is this mapping is disabled by a negative map */ int file_index; int stream_index; int sync_file_index; int sync_stream_index; char *linklabel; /* name of an output link, for mapping lavfi outputs */ } StreamMap; typedef struct { int file_idx, stream_idx, channel_idx; // input int ofile_idx, ostream_idx; // output } AudioChannelMap; typedef struct OptionsContext { OptionGroup *g; /* input/output options */ int64_t start_time; const char *format; SpecifierOpt *codec_names; int nb_codec_names; SpecifierOpt *audio_channels; int nb_audio_channels; SpecifierOpt *audio_sample_rate; int nb_audio_sample_rate; SpecifierOpt *frame_rates; int nb_frame_rates; SpecifierOpt *frame_sizes; int nb_frame_sizes; SpecifierOpt *frame_pix_fmts; int nb_frame_pix_fmts; /* input options */ int64_t input_ts_offset; int rate_emu; int accurate_seek; SpecifierOpt *ts_scale; int nb_ts_scale; SpecifierOpt *dump_attachment; int nb_dump_attachment; /* output options */ StreamMap *stream_maps; int nb_stream_maps; AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */ int nb_audio_channel_maps; /* number of (valid) -map_channel settings */ int metadata_global_manual; int metadata_streams_manual; int metadata_chapters_manual; const char **attachments; int nb_attachments; int chapters_input_file; int64_t recording_time; int64_t stop_time; uint64_t limit_filesize; float mux_preload; float mux_max_delay; int shortest; int video_disable; int audio_disable; int subtitle_disable; int data_disable; /* indexed by output file stream index */ int *streamid_map; int nb_streamid_map; SpecifierOpt *metadata; int nb_metadata; SpecifierOpt *max_frames; int nb_max_frames; SpecifierOpt *bitstream_filters; int nb_bitstream_filters; SpecifierOpt *codec_tags; int nb_codec_tags; SpecifierOpt *sample_fmts; int nb_sample_fmts; SpecifierOpt *qscale; int nb_qscale; SpecifierOpt *forced_key_frames; int nb_forced_key_frames; SpecifierOpt *force_fps; int nb_force_fps; SpecifierOpt *frame_aspect_ratios; int nb_frame_aspect_ratios; SpecifierOpt *rc_overrides; int nb_rc_overrides; SpecifierOpt *intra_matrices; int nb_intra_matrices; SpecifierOpt *inter_matrices; int nb_inter_matrices; SpecifierOpt *top_field_first; int nb_top_field_first; SpecifierOpt *metadata_map; int nb_metadata_map; SpecifierOpt *presets; int nb_presets; SpecifierOpt *copy_initial_nonkeyframes; int nb_copy_initial_nonkeyframes; SpecifierOpt *copy_prior_start; int nb_copy_prior_start; SpecifierOpt *filters; int nb_filters; SpecifierOpt *filter_scripts; int nb_filter_scripts; SpecifierOpt *reinit_filters; int nb_reinit_filters; SpecifierOpt *fix_sub_duration; int nb_fix_sub_duration; SpecifierOpt *canvas_sizes; int nb_canvas_sizes; SpecifierOpt *pass; int nb_pass; SpecifierOpt *passlogfiles; int nb_passlogfiles; SpecifierOpt *guess_layout_max; int nb_guess_layout_max; SpecifierOpt *apad; int nb_apad; } OptionsContext; typedef struct InputFilter { AVFilterContext *filter; struct InputStream *ist; struct FilterGraph *graph; uint8_t *name; } InputFilter; typedef struct OutputFilter { AVFilterContext *filter; struct OutputStream *ost; struct FilterGraph *graph; uint8_t *name; /* temporary storage until stream maps are processed */ AVFilterInOut *out_tmp; } OutputFilter; typedef struct FilterGraph { int index; const char *graph_desc; AVFilterGraph *graph; int reconfiguration; InputFilter **inputs; int nb_inputs; OutputFilter **outputs; int nb_outputs; } FilterGraph; typedef struct InputStream { int file_index; AVStream *st; int discard; /* true if stream data should be discarded */ int decoding_needed; /* true if the packets must be decoded in 'raw_fifo' */ AVCodec *dec; AVFrame *decoded_frame; AVFrame *filter_frame; /* a ref of decoded_frame, to be sent to filters */ int64_t start; /* time when read started */ /* predicted dts of the next packet read for this stream or (when there are * several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */ int64_t next_dts; int64_t dts; ///< dts of the last packet read for this stream (in AV_TIME_BASE units) int64_t next_pts; ///< synthetic pts for the next decode frame (in AV_TIME_BASE units) int64_t pts; ///< current pts of the decoded frame (in AV_TIME_BASE units) int wrap_correction_done; int64_t filter_in_rescale_delta_last; double ts_scale; int is_start; /* is 1 at the start and after a discontinuity */ int saw_first_ts; int showed_multi_packet_warning; AVDictionary *opts; AVRational framerate; /* framerate forced with -r */ int top_field_first; int guess_layout_max; int resample_height; int resample_width; int resample_pix_fmt; int resample_sample_fmt; int resample_sample_rate; int resample_channels; uint64_t resample_channel_layout; int fix_sub_duration; struct { /* previous decoded subtitle and related variables */ int got_output; int ret; AVSubtitle subtitle; } prev_sub; struct sub2video { int64_t last_pts; int64_t end_pts; AVFrame *frame; int w, h; } sub2video; int dr1; /* decoded data from this stream goes into all those filters * currently video and audio only */ InputFilter **filters; int nb_filters; int reinit_filters; } InputStream; typedef struct InputFile { AVFormatContext *ctx; int eof_reached; /* true if eof reached */ int eagain; /* true if last read attempt returned EAGAIN */ int ist_index; /* index of first stream in input_streams */ int64_t ts_offset; int64_t last_ts; int64_t start_time; /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */ int64_t recording_time; int nb_streams; /* number of stream that ffmpeg is aware of; may be different from ctx.nb_streams if new streams appear during av_read_frame() */ int nb_streams_warn; /* number of streams that the user was warned of */ int rate_emu; int accurate_seek; #if HAVE_PTHREADS pthread_t thread; /* thread reading from this file */ int finished; /* the thread has exited */ int joined; /* the thread has been joined */ pthread_mutex_t fifo_lock; /* lock for access to fifo */ pthread_cond_t fifo_cond; /* the main thread will signal on this cond after reading from fifo */ AVFifoBuffer *fifo; /* demuxed packets are stored here; freed by the main thread */ #endif } InputFile; enum forced_keyframes_const { FKF_N, FKF_N_FORCED, FKF_PREV_FORCED_N, FKF_PREV_FORCED_T, FKF_T, FKF_NB }; extern const char *const forced_keyframes_const_names[]; typedef struct OutputStream { int file_index; /* file index */ int index; /* stream index in the output file */ int source_index; /* InputStream index */ AVStream *st; /* stream in the output file */ int encoding_needed; /* true if encoding needed for this stream */ int frame_number; /* input pts and corresponding output pts for A/V sync */ struct InputStream *sync_ist; /* input stream to sync against */ int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number /* pts of the first frame encoded for this stream, used for limiting * recording time */ int64_t first_pts; /* dts of the last packet sent to the muxer */ int64_t last_mux_dts; AVBitStreamFilterContext *bitstream_filters; AVCodec *enc; int64_t max_frames; AVFrame *filtered_frame; /* video only */ AVRational frame_rate; int force_fps; int top_field_first; AVRational frame_aspect_ratio; /* forced key frames */ int64_t *forced_kf_pts; int forced_kf_count; int forced_kf_index; char *forced_keyframes; AVExpr *forced_keyframes_pexpr; double forced_keyframes_expr_const_values[FKF_NB]; /* audio only */ int audio_channels_map[SWR_CH_MAX]; /* list of the channels id to pick from the source stream */ int audio_channels_mapped; /* number of channels in audio_channels_map */ char *logfile_prefix; FILE *logfile; OutputFilter *filter; char *avfilter; int64_t sws_flags; AVDictionary *opts; AVDictionary *swr_opts; AVDictionary *resample_opts; char *apad; int finished; /* no more packets should be written for this stream */ int unavailable; /* true if the steram is unavailable (possibly temporarily) */ int stream_copy; const char *attachment_filename; int copy_initial_nonkeyframes; int copy_prior_start; int keep_pix_fmt; } OutputStream; typedef struct OutputFile { AVFormatContext *ctx; AVDictionary *opts; int ost_index; /* index of the first stream in output_streams */ int64_t recording_time; ///< desired length of the resulting file in microseconds == AV_TIME_BASE units int64_t start_time; ///< start time in microseconds == AV_TIME_BASE units uint64_t limit_filesize; /* filesize limit expressed in bytes */ int shortest; } OutputFile; extern InputStream **input_streams; extern int nb_input_streams; extern InputFile **input_files; extern int nb_input_files; extern OutputStream **output_streams; extern int nb_output_streams; extern OutputFile **output_files; extern int nb_output_files; extern FilterGraph **filtergraphs; extern int nb_filtergraphs; extern char *vstats_filename; extern float audio_drift_threshold; extern float dts_delta_threshold; extern float dts_error_threshold; extern int audio_volume; extern int audio_sync_method; extern int video_sync_method; extern int do_benchmark; extern int do_benchmark_all; extern int do_deinterlace; extern int do_hex_dump; extern int do_pkt_dump; extern int copy_ts; extern int copy_tb; extern int debug_ts; extern int exit_on_error; extern int print_stats; extern int qp_hist; extern int stdin_interaction; extern int frame_bits_per_raw_sample; extern AVIOContext *progress_avio; extern const AVIOInterruptCB int_cb; extern const OptionDef options[]; void term_init(void); void term_exit(void); void reset_options(OptionsContext *o, int is_input); void show_usage(void); void opt_output_file(void *optctx, const char *filename); void assert_avoptions(AVDictionary *m); int guess_input_channel_layout(InputStream *ist); enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodec *codec, enum AVPixelFormat target); void choose_sample_fmt(AVStream *st, AVCodec *codec); int configure_filtergraph(FilterGraph *fg); int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out); int ist_in_filtergraph(FilterGraph *fg, InputStream *ist); FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost); int ffmpeg_parse_options(int argc, char **argv); #endif /* FFMPEG_H */