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FFmpeg/fftools/ffmpeg.h
Anton Khirnov 42a0dd6e7e fftools/ffmpeg: add an option for writing pre-muxing stats 
Analogous to -enc_stats*, but happens right before muxing. Useful
because bitstream filters and the sync queue can modify packets after
encoding and before muxing. Also has access to the muxing timebase.
2023-02-09 15:24:15 +01:00

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/*
* 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 FFTOOLS_FFMPEG_H
#define FFTOOLS_FFMPEG_H
#include "config.h"
#include <stdatomic.h>
#include <stdint.h>
#include <stdio.h>
#include <signal.h>
#include "cmdutils.h"
#include "sync_queue.h"
#include "libavformat/avformat.h"
#include "libavformat/avio.h"
#include "libavcodec/avcodec.h"
#include "libavcodec/bsf.h"
#include "libavfilter/avfilter.h"
#include "libavutil/avutil.h"
#include "libavutil/dict.h"
#include "libavutil/eval.h"
#include "libavutil/fifo.h"
#include "libavutil/hwcontext.h"
#include "libavutil/pixfmt.h"
#include "libavutil/rational.h"
#include "libavutil/thread.h"
#include "libavutil/threadmessage.h"
#include "libswresample/swresample.h"
// deprecated features
#define FFMPEG_OPT_PSNR 1
#define FFMPEG_OPT_MAP_CHANNEL 1
#define FFMPEG_OPT_MAP_SYNC 1
#define FFMPEG_ROTATION_METADATA 1
enum VideoSyncMethod {
VSYNC_AUTO = -1,
VSYNC_PASSTHROUGH,
VSYNC_CFR,
VSYNC_VFR,
VSYNC_VSCFR,
VSYNC_DROP,
};
#define MAX_STREAMS 1024 /* arbitrary sanity check value */
enum HWAccelID {
HWACCEL_NONE = 0,
HWACCEL_AUTO,
HWACCEL_GENERIC,
};
typedef struct HWDevice {
const char *name;
enum AVHWDeviceType type;
AVBufferRef *device_ref;
} HWDevice;
/* 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;
char *linklabel; /* name of an output link, for mapping lavfi outputs */
} StreamMap;
#if FFMPEG_OPT_MAP_CHANNEL
typedef struct {
int file_idx, stream_idx, channel_idx; // input
int ofile_idx, ostream_idx; // output
} AudioChannelMap;
#endif
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_ch_layouts;
int nb_audio_ch_layouts;
SpecifierOpt *audio_channels;
int nb_audio_channels;
SpecifierOpt *audio_sample_rate;
int nb_audio_sample_rate;
SpecifierOpt *frame_rates;
int nb_frame_rates;
SpecifierOpt *max_frame_rates;
int nb_max_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 loop;
int rate_emu;
float readrate;
int accurate_seek;
int thread_queue_size;
int input_sync_ref;
int find_stream_info;
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 *hwaccel_output_formats;
int nb_hwaccel_output_formats;
SpecifierOpt *autorotate;
int nb_autorotate;
/* output options */
StreamMap *stream_maps;
int nb_stream_maps;
#if FFMPEG_OPT_MAP_CHANNEL
AudioChannelMap *audio_channel_maps; /* one info entry per -map_channel */
int nb_audio_channel_maps; /* number of (valid) -map_channel settings */
#endif
const char **attachments;
int nb_attachments;
int chapters_input_file;
int64_t recording_time;
int64_t stop_time;
int64_t limit_filesize;
float mux_preload;
float mux_max_delay;
float shortest_buf_duration;
int shortest;
int bitexact;
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 *fps_mode;
int nb_fps_mode;
SpecifierOpt *force_fps;
int nb_force_fps;
SpecifierOpt *frame_aspect_ratios;
int nb_frame_aspect_ratios;
SpecifierOpt *display_rotations;
int nb_display_rotations;
SpecifierOpt *display_hflips;
int nb_display_hflips;
SpecifierOpt *display_vflips;
int nb_display_vflips;
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 *fix_sub_duration_heartbeat;
int nb_fix_sub_duration_heartbeat;
SpecifierOpt *canvas_sizes;
int nb_canvas_sizes;
SpecifierOpt *pass;
int nb_pass;
SpecifierOpt *passlogfiles;
int nb_passlogfiles;
SpecifierOpt *max_muxing_queue_size;
int nb_max_muxing_queue_size;
SpecifierOpt *muxing_queue_data_threshold;
int nb_muxing_queue_data_threshold;
SpecifierOpt *guess_layout_max;
int nb_guess_layout_max;
SpecifierOpt *apad;
int nb_apad;
SpecifierOpt *discard;
int nb_discard;
SpecifierOpt *disposition;
int nb_disposition;
SpecifierOpt *program;
int nb_program;
SpecifierOpt *time_bases;
int nb_time_bases;
SpecifierOpt *enc_time_bases;
int nb_enc_time_bases;
SpecifierOpt *autoscale;
int nb_autoscale;
SpecifierOpt *bits_per_raw_sample;
int nb_bits_per_raw_sample;
SpecifierOpt *enc_stats_pre;
int nb_enc_stats_pre;
SpecifierOpt *enc_stats_post;
int nb_enc_stats_post;
SpecifierOpt *mux_stats;
int nb_mux_stats;
SpecifierOpt *enc_stats_pre_fmt;
int nb_enc_stats_pre_fmt;
SpecifierOpt *enc_stats_post_fmt;
int nb_enc_stats_post_fmt;
SpecifierOpt *mux_stats_fmt;
int nb_mux_stats_fmt;
} OptionsContext;
typedef struct InputFilter {
AVFilterContext *filter;
struct InputStream *ist;
struct FilterGraph *graph;
uint8_t *name;
enum AVMediaType type; // AVMEDIA_TYPE_SUBTITLE for sub2video
AVFifo *frame_queue;
// parameters configured for this input
int format;
int width, height;
AVRational sample_aspect_ratio;
int sample_rate;
AVChannelLayout ch_layout;
AVBufferRef *hw_frames_ctx;
int32_t *displaymatrix;
int eof;
} 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;
/* desired output stream properties */
int width, height;
AVRational frame_rate;
int format;
int sample_rate;
AVChannelLayout ch_layout;
// those are only set if no format is specified and the encoder gives us multiple options
// They point directly to the relevant lists of the encoder.
const int *formats;
const AVChannelLayout *ch_layouts;
const int *sample_rates;
} OutputFilter;
typedef struct FilterGraph {
int index;
const char *graph_desc;
AVFilterGraph *graph;
int reconfiguration;
// true when the filtergraph contains only meta filters
// that do not modify the frame data
int is_meta;
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
int processing_needed; /* non zero if the packets must be processed */
// should attach FrameData as opaque_ref after decoding
int want_frame_data;
/**
* Codec parameters - to be used by the decoding/streamcopy code.
* st->codecpar should not be accessed, because it may be modified
* concurrently by the demuxing thread.
*/
AVCodecParameters *par;
AVCodecContext *dec_ctx;
const AVCodec *dec;
AVFrame *decoded_frame;
AVPacket *pkt;
AVRational framerate_guessed;
int64_t prev_pkt_pts;
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 first_dts; ///< dts of the first packet read for this stream (in AV_TIME_BASE units)
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;
// the value of AVCodecParserContext.repeat_pict from the AVStream parser
// for the last packet returned from ifile_get_packet()
// -1 if unknown
// FIXME: this is a hack, the avstream parser should not be used
int last_pkt_repeat_pict;
int64_t filter_in_rescale_delta_last;
int64_t min_pts; /* pts with the smallest value in a current stream */
int64_t max_pts; /* pts with the higher value in a current stream */
// when forcing constant input framerate through -r,
// this contains the pts that will be given to the next decoded frame
int64_t cfr_next_pts;
int64_t nb_samples; /* number of samples in the last decoded audio frame before looping */
double ts_scale;
int saw_first_ts;
AVDictionary *decoder_opts;
AVRational framerate; /* framerate forced with -r */
int top_field_first;
int guess_layout_max;
int autorotate;
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;
AVFifo *sub_queue; ///< queue of AVSubtitle* before filter init
AVFrame *frame;
int w, h;
unsigned int initialize; ///< marks if sub2video_update should force an initialization
} sub2video;
/* 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;
enum AVHWDeviceType hwaccel_device_type;
char *hwaccel_device;
enum AVPixelFormat hwaccel_output_format;
int (*hwaccel_retrieve_data)(AVCodecContext *s, AVFrame *frame);
enum AVPixelFormat hwaccel_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;
int64_t *dts_buffer;
int nb_dts_buffer;
int got_output;
} InputStream;
typedef struct LastFrameDuration {
int stream_idx;
int64_t duration;
} LastFrameDuration;
typedef struct InputFile {
int index;
AVFormatContext *ctx;
int eof_reached; /* true if eof reached */
int eagain; /* true if last read attempt returned EAGAIN */
int64_t input_ts_offset;
int input_sync_ref;
/**
* Effective format start time based on enabled streams.
*/
int64_t start_time_effective;
int64_t ts_offset;
/**
* Extra timestamp offset added by discontinuity handling.
*/
int64_t ts_offset_discont;
int64_t last_ts;
int64_t start_time; /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
int64_t recording_time;
/* streams that ffmpeg is aware of;
* there may be extra streams in ctx that are not mapped to an InputStream
* if new streams appear dynamically during demuxing */
InputStream **streams;
int nb_streams;
int rate_emu;
float readrate;
int accurate_seek;
/* when looping the input file, this queue is used by decoders to report
* the last frame duration back to the demuxer thread */
AVThreadMessageQueue *audio_duration_queue;
int audio_duration_queue_size;
} InputFile;
enum forced_keyframes_const {
FKF_N,
FKF_N_FORCED,
FKF_PREV_FORCED_N,
FKF_PREV_FORCED_T,
FKF_T,
FKF_NB
};
#define ABORT_ON_FLAG_EMPTY_OUTPUT (1 << 0)
#define ABORT_ON_FLAG_EMPTY_OUTPUT_STREAM (1 << 1)
enum EncStatsType {
ENC_STATS_LITERAL = 0,
ENC_STATS_FILE_IDX,
ENC_STATS_STREAM_IDX,
ENC_STATS_FRAME_NUM,
ENC_STATS_FRAME_NUM_IN,
ENC_STATS_TIMEBASE,
ENC_STATS_TIMEBASE_IN,
ENC_STATS_PTS,
ENC_STATS_PTS_TIME,
ENC_STATS_PTS_IN,
ENC_STATS_PTS_TIME_IN,
ENC_STATS_DTS,
ENC_STATS_DTS_TIME,
ENC_STATS_SAMPLE_NUM,
ENC_STATS_NB_SAMPLES,
ENC_STATS_PKT_SIZE,
ENC_STATS_BITRATE,
ENC_STATS_AVG_BITRATE,
};
typedef struct EncStatsComponent {
enum EncStatsType type;
uint8_t *str;
size_t str_len;
} EncStatsComponent;
typedef struct EncStats {
EncStatsComponent *components;
int nb_components;
AVIOContext *io;
} EncStats;
extern const char *const forced_keyframes_const_names[];
typedef enum {
ENCODER_FINISHED = 1,
MUXER_FINISHED = 2,
} OSTFinished ;
enum {
KF_FORCE_SOURCE = 1,
KF_FORCE_SOURCE_NO_DROP = 2,
};
typedef struct KeyframeForceCtx {
int type;
int64_t ref_pts;
// timestamps of the forced keyframes, in AV_TIME_BASE_Q
int64_t *pts;
int nb_pts;
int index;
AVExpr *pexpr;
double expr_const_values[FKF_NB];
int dropped_keyframe;
} KeyframeForceCtx;
typedef struct OutputStream {
const AVClass *class;
int file_index; /* file index */
int index; /* stream index in the output file */
/* input stream that is the source for this output stream;
* may be NULL for streams with no well-defined source, e.g.
* attachments or outputs from complex filtergraphs */
InputStream *ist;
AVStream *st; /* stream in the output file */
/* number of frames emitted by the video-encoding sync code */
int64_t vsync_frame_number;
/* predicted pts of the next frame to be encoded
* audio/video encoding only */
int64_t next_pts;
/* dts of the last packet sent to the muxing queue, in AV_TIME_BASE_Q */
int64_t last_mux_dts;
/* pts of the last frame received from the filters, in AV_TIME_BASE_Q */
int64_t last_filter_pts;
// timestamp from which the streamcopied streams should start,
// in AV_TIME_BASE_Q;
// everything before it should be discarded
int64_t ts_copy_start;
// the timebase of the packets sent to the muxer
AVRational mux_timebase;
AVRational enc_timebase;
AVCodecContext *enc_ctx;
AVFrame *filtered_frame;
AVFrame *last_frame;
AVFrame *sq_frame;
AVPacket *pkt;
int64_t last_dropped;
int64_t last_nb0_frames[3];
/* video only */
AVRational frame_rate;
AVRational max_frame_rate;
enum VideoSyncMethod vsync_method;
int is_cfr;
int force_fps;
int top_field_first;
#if FFMPEG_ROTATION_METADATA
int rotate_overridden;
#endif
int autoscale;
int bitexact;
int bits_per_raw_sample;
#if FFMPEG_ROTATION_METADATA
double rotate_override_value;
#endif
AVRational frame_aspect_ratio;
KeyframeForceCtx kf;
/* audio only */
#if FFMPEG_OPT_MAP_CHANNEL
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 */
#endif
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;
char *apad;
OSTFinished finished; /* no more packets should be written for this stream */
int unavailable; /* true if the steram is unavailable (possibly temporarily) */
// init_output_stream() has been called for this stream
// The encoder and the bitstream filters have been initialized and the stream
// parameters are set in the AVStream.
int initialized;
int inputs_done;
const char *attachment_filename;
int streamcopy_started;
int copy_initial_nonkeyframes;
int copy_prior_start;
int keep_pix_fmt;
/* stats */
// combined size of all the packets sent to the muxer
uint64_t data_size_mux;
// combined size of all the packets received from the encoder
uint64_t data_size_enc;
// number of packets send to the muxer
atomic_uint_least64_t packets_written;
// number of frames/samples sent to the encoder
uint64_t frames_encoded;
uint64_t samples_encoded;
// number of packets received from the encoder
uint64_t packets_encoded;
/* packet quality factor */
int quality;
/* packet picture type */
int pict_type;
/* frame encode sum of squared error values */
int64_t error[4];
int sq_idx_encode;
int sq_idx_mux;
EncStats enc_stats_pre;
EncStats enc_stats_post;
/*
* bool on whether this stream should be utilized for splitting
* subtitles utilizing fix_sub_duration at random access points.
*/
unsigned int fix_sub_duration_heartbeat;
} OutputStream;
typedef struct OutputFile {
const AVClass *class;
int index;
const AVOutputFormat *format;
const char *url;
OutputStream **streams;
int nb_streams;
SyncQueue *sq_encode;
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
int shortest;
int bitexact;
} OutputFile;
extern InputFile **input_files;
extern int nb_input_files;
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 enum VideoSyncMethod video_sync_method;
extern float frame_drop_threshold;
extern int do_benchmark;
extern int do_benchmark_all;
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 abort_on_flags;
extern int print_stats;
extern int64_t stats_period;
extern int qp_hist;
extern int stdin_interaction;
extern AVIOContext *progress_avio;
extern float max_error_rate;
extern char *filter_nbthreads;
extern int filter_complex_nbthreads;
extern int vstats_version;
extern int auto_conversion_filters;
extern const AVIOInterruptCB int_cb;
extern const OptionDef options[];
extern HWDevice *filter_hw_device;
extern unsigned nb_output_dumped;
extern int main_return_code;
extern int ignore_unknown_streams;
extern int copy_unknown_streams;
extern int recast_media;
#if FFMPEG_OPT_PSNR
extern int do_psnr;
#endif
void term_init(void);
void term_exit(void);
void show_usage(void);
void remove_avoptions(AVDictionary **a, AVDictionary *b);
void assert_avoptions(AVDictionary *m);
void assert_file_overwrite(const char *filename);
char *file_read(const char *filename);
AVDictionary *strip_specifiers(const AVDictionary *dict);
const AVCodec *find_codec_or_die(void *logctx, const char *name,
enum AVMediaType type, int encoder);
int parse_and_set_vsync(const char *arg, int *vsync_var, int file_idx, int st_idx, int is_global);
int configure_filtergraph(FilterGraph *fg);
void check_filter_outputs(void);
int filtergraph_is_simple(FilterGraph *fg);
int init_simple_filtergraph(InputStream *ist, OutputStream *ost);
int init_complex_filtergraph(FilterGraph *fg);
void sub2video_update(InputStream *ist, int64_t heartbeat_pts, AVSubtitle *sub);
int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame);
int ffmpeg_parse_options(int argc, char **argv);
void enc_stats_write(OutputStream *ost, EncStats *es,
const AVFrame *frame, const AVPacket *pkt,
uint64_t frame_num);
HWDevice *hw_device_get_by_name(const char *name);
int hw_device_init_from_string(const char *arg, HWDevice **dev);
void hw_device_free_all(void);
int hw_device_setup_for_decode(InputStream *ist);
int hw_device_setup_for_encode(OutputStream *ost);
int hw_device_setup_for_filter(FilterGraph *fg);
int hwaccel_decode_init(AVCodecContext *avctx);
/*
* Initialize muxing state for the given stream, should be called
* after the codec/streamcopy setup has been done.
*
* Open the muxer once all the streams have been initialized.
*/
int of_stream_init(OutputFile *of, OutputStream *ost);
int of_write_trailer(OutputFile *of);
int of_open(const OptionsContext *o, const char *filename);
void of_close(OutputFile **pof);
void of_enc_stats_close(void);
/*
* Send a single packet to the output, applying any bitstream filters
* associated with the output stream. This may result in any number
* of packets actually being written, depending on what bitstream
* filters are applied. The supplied packet is consumed and will be
* blank (as if newly-allocated) when this function returns.
*
* If eof is set, instead indicate EOF to all bitstream filters and
* therefore flush any delayed packets to the output. A blank packet
* must be supplied in this case.
*/
void of_output_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int eof);
int64_t of_filesize(OutputFile *of);
int ifile_open(const OptionsContext *o, const char *filename);
void ifile_close(InputFile **f);
/**
* Get next input packet from the demuxer.
*
* @param pkt the packet is written here when this function returns 0
* @return
* - 0 when a packet has been read successfully
* - 1 when stream end was reached, but the stream is looped;
* caller should flush decoders and read from this demuxer again
* - a negative error code on failure
*/
int ifile_get_packet(InputFile *f, AVPacket **pkt);
/* iterate over all input streams in all input files;
* pass NULL to start iteration */
InputStream *ist_iter(InputStream *prev);
#define SPECIFIER_OPT_FMT_str "%s"
#define SPECIFIER_OPT_FMT_i "%i"
#define SPECIFIER_OPT_FMT_i64 "%"PRId64
#define SPECIFIER_OPT_FMT_ui64 "%"PRIu64
#define SPECIFIER_OPT_FMT_f "%f"
#define SPECIFIER_OPT_FMT_dbl "%lf"
#define WARN_MULTIPLE_OPT_USAGE(name, type, so, st)\
{\
char namestr[128] = "";\
const char *spec = so->specifier && so->specifier[0] ? so->specifier : "";\
for (int _i = 0; opt_name_##name[_i]; _i++)\
av_strlcatf(namestr, sizeof(namestr), "-%s%s", opt_name_##name[_i], opt_name_##name[_i+1] ? (opt_name_##name[_i+2] ? ", " : " or ") : "");\
av_log(NULL, AV_LOG_WARNING, "Multiple %s options specified for stream %d, only the last option '-%s%s%s "SPECIFIER_OPT_FMT_##type"' will be used.\n",\
namestr, st->index, opt_name_##name[0], spec[0] ? ":" : "", spec, so->u.type);\
}
#define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
{\
int _ret, _matches = 0;\
SpecifierOpt *so;\
for (int _i = 0; _i < o->nb_ ## name; _i++) {\
char *spec = o->name[_i].specifier;\
if ((_ret = check_stream_specifier(fmtctx, st, spec)) > 0) {\
outvar = o->name[_i].u.type;\
so = &o->name[_i];\
_matches++;\
} else if (_ret < 0)\
exit_program(1);\
}\
if (_matches > 1)\
WARN_MULTIPLE_OPT_USAGE(name, type, so, st);\
}
#define MATCH_PER_TYPE_OPT(name, type, outvar, fmtctx, mediatype)\
{\
int i;\
for (i = 0; i < o->nb_ ## name; i++) {\
char *spec = o->name[i].specifier;\
if (!strcmp(spec, mediatype))\
outvar = o->name[i].u.type;\
}\
}
extern const char * const opt_name_codec_names[];
extern const char * const opt_name_codec_tags[];
extern const char * const opt_name_frame_rates[];
extern const char * const opt_name_top_field_first[];
#endif /* FFTOOLS_FFMPEG_H */
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