[deb_ffmpeg.git] / ffmpeg / ffmpeg.h

/*
 * 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 "libavutil/threadmessage.h"

#include "libswresample/swresample.h"

#define VSYNC_AUTO       -1
#define VSYNC_PASSTHROUGH 0
#define VSYNC_CFR         1
#define VSYNC_VFR         2
#define VSYNC_VSCFR       0xfe
#define VSYNC_DROP        0xff

#define MAX_STREAMS 1024    /* arbitrary sanity check value */

enum HWAccelID {
    HWACCEL_NONE = 0,
    HWACCEL_AUTO,
    HWACCEL_VDPAU,
    HWACCEL_DXVA2,
    HWACCEL_VDA,
};

typedef struct HWAccel {
    const char *name;
    int (*init)(AVCodecContext *s);
    enum HWAccelID id;
    enum AVPixelFormat pix_fmt;
} HWAccel;

/* 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;
    SpecifierOpt *hwaccels;
    int        nb_hwaccels;
    SpecifierOpt *hwaccel_devices;
    int        nb_hwaccel_devices;

    /* 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;
} 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 user_set_discard;
    int decoding_needed;     /* non zero if the packets must be decoded in 'raw_fifo', see DECODING_FOR_* */
#define DECODING_FOR_OST    1
#define DECODING_FOR_FILTER 2

    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
     * 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 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 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;

    /* 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 */
    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
    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 */
#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 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
       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;
    AVCodecContext *enc_ctx;
    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;             /* 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

    int64_t sws_flags;
    AVDictionary *encoder_opts;
    AVDictionary *swr_opts;
    AVDictionary *resample_opts;
    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;

    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;
} 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 float max_error_rate;

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 ffmpeg_parse_options(int argc, char **argv);

int vdpau_init(AVCodecContext *s);
int dxva2_init(AVCodecContext *s);
int vda_init(AVCodecContext *s);

#endif /* FFMPEG_H */
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* This file is part of FFmpeg.
	3	*
	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.
	8	*
	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.
	13	*
	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
	17	*/
	18
	19	#ifndef FFMPEG_H
	20	#define FFMPEG_H
	21
	22	#include "config.h"
	23
	24	#include <stdint.h>
	25	#include <stdio.h>
	26	#include <signal.h>
	27
	28	#if HAVE_PTHREADS
	29	#include <pthread.h>
	30	#endif
	31
	32	#include "cmdutils.h"
	33
	34	#include "libavformat/avformat.h"
	35	#include "libavformat/avio.h"
	36
	37	#include "libavcodec/avcodec.h"
	38
	39	#include "libavfilter/avfilter.h"
	40
	41	#include "libavutil/avutil.h"
	42	#include "libavutil/dict.h"
	43	#include "libavutil/eval.h"
	44	#include "libavutil/fifo.h"
	45	#include "libavutil/pixfmt.h"
	46	#include "libavutil/rational.h"
	47	#include "libavutil/threadmessage.h"
	48
	49	#include "libswresample/swresample.h"
	50
	51	#define VSYNC_AUTO -1
	52	#define VSYNC_PASSTHROUGH 0
	53	#define VSYNC_CFR 1
	54	#define VSYNC_VFR 2
	55	#define VSYNC_VSCFR 0xfe
	56	#define VSYNC_DROP 0xff
	57
	58	#define MAX_STREAMS 1024 /* arbitrary sanity check value */
	59
	60	enum HWAccelID {
	61	HWACCEL_NONE = 0,
	62	HWACCEL_AUTO,
	63	HWACCEL_VDPAU,
	64	HWACCEL_DXVA2,
65	HWACCEL_VDA,
66	};
67
68	typedef struct HWAccel {
69	const char *name;
70	int (init)(AVCodecContext s);
71	enum HWAccelID id;
72	enum AVPixelFormat pix_fmt;
73	} HWAccel;
74
75	/* select an input stream for an output stream */
76	typedef struct StreamMap {
77	int disabled; /* 1 is this mapping is disabled by a negative map */
78	int file_index;
79	int stream_index;
80	int sync_file_index;
81	int sync_stream_index;
82	char linklabel; / name of an output link, for mapping lavfi outputs */
83	} StreamMap;
84
85	typedef struct {
86	int file_idx, stream_idx, channel_idx; // input
87	int ofile_idx, ostream_idx; // output
88	} AudioChannelMap;
89
90	typedef struct OptionsContext {
91	OptionGroup *g;
92
93	/* input/output options */
94	int64_t start_time;
95	const char *format;
96
97	SpecifierOpt *codec_names;
98	int nb_codec_names;
99	SpecifierOpt *audio_channels;
100	int nb_audio_channels;
101	SpecifierOpt *audio_sample_rate;
102	int nb_audio_sample_rate;
103	SpecifierOpt *frame_rates;
104	int nb_frame_rates;
105	SpecifierOpt *frame_sizes;
106	int nb_frame_sizes;
107	SpecifierOpt *frame_pix_fmts;
108	int nb_frame_pix_fmts;
109
110	/* input options */
111	int64_t input_ts_offset;
112	int rate_emu;
113	int accurate_seek;
114
115	SpecifierOpt *ts_scale;
116	int nb_ts_scale;
117	SpecifierOpt *dump_attachment;
118	int nb_dump_attachment;
119	SpecifierOpt *hwaccels;
120	int nb_hwaccels;
121	SpecifierOpt *hwaccel_devices;
122	int nb_hwaccel_devices;
123
124	/* output options */
125	StreamMap *stream_maps;
126	int nb_stream_maps;
127	AudioChannelMap audio_channel_maps; / one info entry per -map_channel */
128	int nb_audio_channel_maps; /* number of (valid) -map_channel settings */
129	int metadata_global_manual;
130	int metadata_streams_manual;
131	int metadata_chapters_manual;
132	const char **attachments;
133	int nb_attachments;
134
135	int chapters_input_file;
136
137	int64_t recording_time;
138	int64_t stop_time;
139	uint64_t limit_filesize;
140	float mux_preload;
141	float mux_max_delay;
142	int shortest;
143
144	int video_disable;
145	int audio_disable;
146	int subtitle_disable;
147	int data_disable;
148
149	/* indexed by output file stream index */
150	int *streamid_map;
151	int nb_streamid_map;
152
153	SpecifierOpt *metadata;
154	int nb_metadata;
155	SpecifierOpt *max_frames;
156	int nb_max_frames;
157	SpecifierOpt *bitstream_filters;
158	int nb_bitstream_filters;
159	SpecifierOpt *codec_tags;
160	int nb_codec_tags;
161	SpecifierOpt *sample_fmts;
162	int nb_sample_fmts;
163	SpecifierOpt *qscale;
164	int nb_qscale;
165	SpecifierOpt *forced_key_frames;
166	int nb_forced_key_frames;
167	SpecifierOpt *force_fps;
168	int nb_force_fps;
169	SpecifierOpt *frame_aspect_ratios;
170	int nb_frame_aspect_ratios;
171	SpecifierOpt *rc_overrides;
172	int nb_rc_overrides;
173	SpecifierOpt *intra_matrices;
174	int nb_intra_matrices;
175	SpecifierOpt *inter_matrices;
176	int nb_inter_matrices;
177	SpecifierOpt *chroma_intra_matrices;
178	int nb_chroma_intra_matrices;
179	SpecifierOpt *top_field_first;
180	int nb_top_field_first;
181	SpecifierOpt *metadata_map;
182	int nb_metadata_map;
183	SpecifierOpt *presets;
184	int nb_presets;
185	SpecifierOpt *copy_initial_nonkeyframes;
186	int nb_copy_initial_nonkeyframes;
187	SpecifierOpt *copy_prior_start;
188	int nb_copy_prior_start;
189	SpecifierOpt *filters;
190	int nb_filters;
191	SpecifierOpt *filter_scripts;
192	int nb_filter_scripts;
193	SpecifierOpt *reinit_filters;
194	int nb_reinit_filters;
195	SpecifierOpt *fix_sub_duration;
196	int nb_fix_sub_duration;
197	SpecifierOpt *canvas_sizes;
198	int nb_canvas_sizes;
199	SpecifierOpt *pass;
200	int nb_pass;
201	SpecifierOpt *passlogfiles;
202	int nb_passlogfiles;
203	SpecifierOpt *guess_layout_max;
204	int nb_guess_layout_max;
205	SpecifierOpt *apad;
206	int nb_apad;
207	SpecifierOpt *discard;
208	int nb_discard;
209	} OptionsContext;
210
211	typedef struct InputFilter {
212	AVFilterContext *filter;
213	struct InputStream *ist;
214	struct FilterGraph *graph;
215	uint8_t *name;
216	} InputFilter;
217
218	typedef struct OutputFilter {
219	AVFilterContext *filter;
220	struct OutputStream *ost;
221	struct FilterGraph *graph;
222	uint8_t *name;
223
224	/* temporary storage until stream maps are processed */
225	AVFilterInOut *out_tmp;
226	} OutputFilter;
227
228	typedef struct FilterGraph {
229	int index;
230	const char *graph_desc;
231
232	AVFilterGraph *graph;
233	int reconfiguration;
234
235	InputFilter **inputs;
236	int nb_inputs;
237	OutputFilter **outputs;
238	int nb_outputs;
239	} FilterGraph;
240
241	typedef struct InputStream {
242	int file_index;
243	AVStream *st;
244	int discard; /* true if stream data should be discarded */
245	int user_set_discard;
246	int decoding_needed; /* non zero if the packets must be decoded in 'raw_fifo', see DECODING_FOR_* */
247	#define DECODING_FOR_OST 1
248	#define DECODING_FOR_FILTER 2
249
250	AVCodecContext *dec_ctx;
251	AVCodec *dec;
252	AVFrame *decoded_frame;
253	AVFrame filter_frame; / a ref of decoded_frame, to be sent to filters */
254
255	int64_t start; /* time when read started */
256	/* predicted dts of the next packet read for this stream or (when there are
257	* several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */
258	int64_t next_dts;
259	int64_t dts; ///< dts of the last packet read for this stream (in AV_TIME_BASE units)
260
261	int64_t next_pts; ///< synthetic pts for the next decode frame (in AV_TIME_BASE units)
262	int64_t pts; ///< current pts of the decoded frame (in AV_TIME_BASE units)
263	int wrap_correction_done;
264
265	int64_t filter_in_rescale_delta_last;
266
267	double ts_scale;
268	int saw_first_ts;
269	int showed_multi_packet_warning;
270	AVDictionary *decoder_opts;
271	AVRational framerate; /* framerate forced with -r */
272	int top_field_first;
273	int guess_layout_max;
274
275	int resample_height;
276	int resample_width;
277	int resample_pix_fmt;
278
279	int resample_sample_fmt;
280	int resample_sample_rate;
281	int resample_channels;
282	uint64_t resample_channel_layout;
283
284	int fix_sub_duration;
285	struct { /* previous decoded subtitle and related variables */
286	int got_output;
287	int ret;
288	AVSubtitle subtitle;
289	} prev_sub;
290
291	struct sub2video {
292	int64_t last_pts;
293	int64_t end_pts;
294	AVFrame *frame;
295	int w, h;
296	} sub2video;
297
298	int dr1;
299
300	/* decoded data from this stream goes into all those filters
301	* currently video and audio only */
302	InputFilter **filters;
303	int nb_filters;
304
305	int reinit_filters;
306
307	/* hwaccel options */
308	enum HWAccelID hwaccel_id;
309	char *hwaccel_device;
310
311	/* hwaccel context */
312	enum HWAccelID active_hwaccel_id;
313	void *hwaccel_ctx;
314	void (hwaccel_uninit)(AVCodecContext s);
315	int (hwaccel_get_buffer)(AVCodecContext s, AVFrame *frame, int flags);
316	int (hwaccel_retrieve_data)(AVCodecContext s, AVFrame *frame);
317	enum AVPixelFormat hwaccel_pix_fmt;
318	enum AVPixelFormat hwaccel_retrieved_pix_fmt;
319
320	/* stats */
321	// combined size of all the packets read
322	uint64_t data_size;
323	/* number of packets successfully read for this stream */
324	uint64_t nb_packets;
325	// number of frames/samples retrieved from the decoder
326	uint64_t frames_decoded;
327	uint64_t samples_decoded;
328	} InputStream;
329
330	typedef struct InputFile {
331	AVFormatContext *ctx;
332	int eof_reached; /* true if eof reached */
333	int eagain; /* true if last read attempt returned EAGAIN */
334	int ist_index; /* index of first stream in input_streams */
335	int64_t input_ts_offset;
336	int64_t ts_offset;
337	int64_t last_ts;
338	int64_t start_time; /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
339	int64_t recording_time;
340	int nb_streams; /* number of stream that ffmpeg is aware of; may be different
341	from ctx.nb_streams if new streams appear during av_read_frame() */
342	int nb_streams_warn; /* number of streams that the user was warned of */
343	int rate_emu;
344	int accurate_seek;
345
346	#if HAVE_PTHREADS
347	AVThreadMessageQueue *in_thread_queue;
348	pthread_t thread; /* thread reading from this file */
349	int non_blocking; /* reading packets from the thread should not block */
350	int joined; /* the thread has been joined */
351	#endif
352	} InputFile;
353
354	enum forced_keyframes_const {
355	FKF_N,
356	FKF_N_FORCED,
357	FKF_PREV_FORCED_N,
358	FKF_PREV_FORCED_T,
359	FKF_T,
360	FKF_NB
361	};
362
363	extern const char *const forced_keyframes_const_names[];
364
365	typedef enum {
366	ENCODER_FINISHED = 1,
367	MUXER_FINISHED = 2,
368	} OSTFinished ;
369
370	typedef struct OutputStream {
371	int file_index; /* file index */
372	int index; /* stream index in the output file */
373	int source_index; /* InputStream index */
374	AVStream st; / stream in the output file */
375	int encoding_needed; /* true if encoding needed for this stream */
376	int frame_number;
377	/* input pts and corresponding output pts
378	for A/V sync */
379	struct InputStream sync_ist; / input stream to sync against */
380	int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
381	/* pts of the first frame encoded for this stream, used for limiting
382	* recording time */
383	int64_t first_pts;
384	/* dts of the last packet sent to the muxer */
385	int64_t last_mux_dts;
386	AVBitStreamFilterContext *bitstream_filters;
387	AVCodecContext *enc_ctx;
388	AVCodec *enc;
389	int64_t max_frames;
390	AVFrame *filtered_frame;
391
392	/* video only */
393	AVRational frame_rate;
394	int force_fps;
395	int top_field_first;
396
397	AVRational frame_aspect_ratio;
398
399	/* forced key frames */
400	int64_t *forced_kf_pts;
401	int forced_kf_count;
402	int forced_kf_index;
403	char *forced_keyframes;
404	AVExpr *forced_keyframes_pexpr;
405	double forced_keyframes_expr_const_values[FKF_NB];
406
407	/* audio only */
408	int audio_channels_map; / list of the channels id to pick from the source stream */
409	int audio_channels_mapped; /* number of channels in audio_channels_map */
410
411	char *logfile_prefix;
412	FILE *logfile;
413
414	OutputFilter *filter;
415	char *avfilter;
416	char *filters; ///< filtergraph associated to the -filter option
417	char *filters_script; ///< filtergraph script associated to the -filter_script option
418
419	int64_t sws_flags;
420	AVDictionary *encoder_opts;
421	AVDictionary *swr_opts;
422	AVDictionary *resample_opts;
423	char *apad;
424	OSTFinished finished; /* no more packets should be written for this stream */
425	int unavailable; /* true if the steram is unavailable (possibly temporarily) */
426	int stream_copy;
427	const char *attachment_filename;
428	int copy_initial_nonkeyframes;
429	int copy_prior_start;
430
431	int keep_pix_fmt;
432
433	AVCodecParserContext *parser;
434
435	/* stats */
436	// combined size of all the packets written
437	uint64_t data_size;
438	// number of packets send to the muxer
439	uint64_t packets_written;
440	// number of frames/samples sent to the encoder
441	uint64_t frames_encoded;
442	uint64_t samples_encoded;
443	} OutputStream;
444
445	typedef struct OutputFile {
446	AVFormatContext *ctx;
447	AVDictionary *opts;
448	int ost_index; /* index of the first stream in output_streams */
449	int64_t recording_time; ///< desired length of the resulting file in microseconds == AV_TIME_BASE units
450	int64_t start_time; ///< start time in microseconds == AV_TIME_BASE units
451	uint64_t limit_filesize; /* filesize limit expressed in bytes */
452
453	int shortest;
454	} OutputFile;
455
456	extern InputStream **input_streams;
457	extern int nb_input_streams;
458	extern InputFile **input_files;
459	extern int nb_input_files;
460
461	extern OutputStream **output_streams;
462	extern int nb_output_streams;
463	extern OutputFile **output_files;
464	extern int nb_output_files;
465
466	extern FilterGraph **filtergraphs;
467	extern int nb_filtergraphs;
468
469	extern char *vstats_filename;
470
471	extern float audio_drift_threshold;
472	extern float dts_delta_threshold;
473	extern float dts_error_threshold;
474
475	extern int audio_volume;
476	extern int audio_sync_method;
477	extern int video_sync_method;
478	extern int do_benchmark;
479	extern int do_benchmark_all;
480	extern int do_deinterlace;
481	extern int do_hex_dump;
482	extern int do_pkt_dump;
483	extern int copy_ts;
484	extern int copy_tb;
485	extern int debug_ts;
486	extern int exit_on_error;
487	extern int print_stats;
488	extern int qp_hist;
489	extern int stdin_interaction;
490	extern int frame_bits_per_raw_sample;
491	extern AVIOContext *progress_avio;
492	extern float max_error_rate;
493
494	extern const AVIOInterruptCB int_cb;
495
496	extern const OptionDef options[];
497	extern const HWAccel hwaccels[];
498
499
500	void term_init(void);
501	void term_exit(void);
502
503	void reset_options(OptionsContext *o, int is_input);
504	void show_usage(void);
505
506	void opt_output_file(void optctx, const char filename);
507
508	void remove_avoptions(AVDictionary *a, AVDictionary b);
509	void assert_avoptions(AVDictionary *m);
510
511	int guess_input_channel_layout(InputStream *ist);
512
513	enum AVPixelFormat choose_pixel_fmt(AVStream st, AVCodecContext avctx, AVCodec *codec, enum AVPixelFormat target);
514	void choose_sample_fmt(AVStream st, AVCodec codec);
515
516	int configure_filtergraph(FilterGraph *fg);
517	int configure_output_filter(FilterGraph fg, OutputFilter ofilter, AVFilterInOut *out);
518	int ist_in_filtergraph(FilterGraph fg, InputStream ist);
519	FilterGraph init_simple_filtergraph(InputStream ist, OutputStream *ost);
520
521	int ffmpeg_parse_options(int argc, char **argv);
522
523	int vdpau_init(AVCodecContext *s);
524	int dxva2_init(AVCodecContext *s);
525	int vda_init(AVCodecContext *s);
526
527	#endif /* FFMPEG_H */