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enum HWAccelID {

    HWACCEL_NONE = 0,

    HWACCEL_AUTO,

    HWACCEL_VDPAU,

    HWACCEL_DXVA2,

    HWACCEL_VDA,

    HWACCEL_VIDEOTOOLBOX,

 

typedef struct HWAccel {

    const char *name;

    int (*init)(AVCodecContext *s);

    enum HWAccelID id;

    enum AVPixelFormat pix_fmt;

} HWAccel;

 

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;

    int64_t start_time_eof;

    int seek_timestamp;

    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;

    int thread_queue_size;

 

    SpecifierOpt *ts_scale;

    int        nb_ts_scale;

    SpecifierOpt *dump_attachment;

    int        nb_dump_attachment;

    SpecifierOpt *hwaccels;

    int        nb_hwaccels;

    SpecifierOpt *hwaccel_devices;

    int        nb_hwaccel_devices;

    SpecifierOpt *autorotate;

    int        nb_autorotate;

 

    /* 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 *chroma_intra_matrices;

    int        nb_chroma_intra_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;

    SpecifierOpt *discard;

    int        nb_discard;

    SpecifierOpt *disposition;

    int        nb_disposition;

} 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;

    enum AVMediaType     type;

} 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 user_set_discard;

    int decoding_needed;     /* non zero if the packets must be decoded in 'raw_fifo', see DECODING_FOR_* */

 

    AVCodecContext *dec_ctx;

    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

    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 saw_first_ts;

    int showed_multi_packet_warning;

    AVDictionary *decoder_opts;

    AVRational framerate;               /* framerate forced with -r */

    int top_field_first;

    int guess_layout_max;

 

    int autorotate;

    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

    InputFilter **filters;

    int        nb_filters;

 

    int reinit_filters;

 

    /* hwaccel options */

    enum HWAccelID hwaccel_id;

    char  *hwaccel_device;

 

    /* hwaccel context */

    enum HWAccelID active_hwaccel_id;

    void  *hwaccel_ctx;

    void (*hwaccel_uninit)(AVCodecContext *s);

    int  (*hwaccel_get_buffer)(AVCodecContext *s, AVFrame *frame, int flags);

    int  (*hwaccel_retrieve_data)(AVCodecContext *s, AVFrame *frame);

    enum AVPixelFormat hwaccel_pix_fmt;

    enum AVPixelFormat hwaccel_retrieved_pix_fmt;

 

    /* stats */

    // combined size of all the packets read

    uint64_t data_size;

    /* number of packets successfully read for this stream */

    uint64_t nb_packets;

    // number of frames/samples retrieved from the decoder

    uint64_t frames_decoded;

    uint64_t samples_decoded;

} 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 input_ts_offset;

    int64_t ts_offset;

    int64_t last_ts;

    int64_t start_time;   /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */

    int seek_timestamp;

    int64_t recording_time;

    int nb_streams;       /* number of stream that ffmpeg is aware of; may be different

    int nb_streams_warn;  /* number of streams that the user was warned of */

    int rate_emu;

    int accurate_seek;

 

    AVThreadMessageQueue *in_thread_queue;

    pthread_t thread;           /* thread reading from this file */

    int non_blocking;           /* reading packets from the thread should not block */

    int joined;                 /* the thread has been joined */

    int thread_queue_size;      /* maximum number of queued packets */

} 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 enum {

    ENCODER_FINISHED = 1,

    MUXER_FINISHED = 2,

} OSTFinished ;

 

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

    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

    int64_t first_pts;

    /* dts of the last packet sent to the muxer */

    int64_t last_mux_dts;

    AVBitStreamFilterContext *bitstream_filters;

    AVCodecContext *enc_ctx;

    AVCodec *enc;

    int64_t max_frames;

    AVFrame *filtered_frame;

    AVFrame *last_frame;

    int last_droped;

    int last_nb0_frames[3];

 

    /* video only */

    AVRational frame_rate;

    int force_fps;

    int top_field_first;

    int rotate_overridden;

 

    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;             /* 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;

    char *filters;         ///< filtergraph associated to the -filter option

    char *filters_script;  ///< filtergraph script associated to the -filter_script option

 

    AVDictionary *encoder_opts;

    AVDictionary *sws_dict;

    AVDictionary *swr_opts;

    AVDictionary *resample_opts;

    AVDictionary *bsf_args;

    char *apad;

    OSTFinished 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;

    char *disposition;

 

    int keep_pix_fmt;

 

    AVCodecParserContext *parser;

 

    /* stats */

    // combined size of all the packets written

    uint64_t data_size;

    // number of packets send to the muxer

    uint64_t packets_written;

    // number of frames/samples sent to the encoder

    uint64_t frames_encoded;

    uint64_t samples_encoded;

 

    /* packet quality factor */

    int quality;

 

    /* packet picture type */

    int pict_type;

 

    /* frame encode sum of squared error values */

    int64_t error[4];

} 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 char *sdp_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 float frame_drop_threshold;

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 start_at_zero;

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 float max_error_rate;

extern int vdpau_api_ver;

extern char *videotoolbox_pixfmt;

 

extern const AVIOInterruptCB int_cb;

 

extern const OptionDef options[];

extern const HWAccel hwaccels[];

 

 

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 remove_avoptions(AVDictionary **a, AVDictionary *b);

void assert_avoptions(AVDictionary *m);

 

int guess_input_channel_layout(InputStream *ist);

 

enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *avctx, 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 init_complex_filtergraph(FilterGraph *fg);

 

int ffmpeg_parse_options(int argc, char **argv);

 

int vdpau_init(AVCodecContext *s);

int dxva2_init(AVCodecContext *s);

int vda_init(AVCodecContext *s);

int videotoolbox_init(AVCodecContext *s);