89 const char *value1,
const char *value2);
95 #define OFFSET(x) offsetof(MetadataContext, x) 96 #define DEFINE_OPTIONS(filt_name, FLAGS) \ 97 static const AVOption filt_name##_options[] = { \ 98 { "mode", "set a mode of operation", OFFSET(mode), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, METADATA_NB-1, FLAGS, "mode" }, \ 99 { "select", "select frame", 0, AV_OPT_TYPE_CONST, {.i64 = METADATA_SELECT }, 0, 0, FLAGS, "mode" }, \ 100 { "add", "add new metadata", 0, AV_OPT_TYPE_CONST, {.i64 = METADATA_ADD }, 0, 0, FLAGS, "mode" }, \ 101 { "modify", "modify metadata", 0, AV_OPT_TYPE_CONST, {.i64 = METADATA_MODIFY }, 0, 0, FLAGS, "mode" }, \ 102 { "delete", "delete metadata", 0, AV_OPT_TYPE_CONST, {.i64 = METADATA_DELETE }, 0, 0, FLAGS, "mode" }, \ 103 { "print", "print metadata", 0, AV_OPT_TYPE_CONST, {.i64 = METADATA_PRINT }, 0, 0, FLAGS, "mode" }, \ 104 { "key", "set metadata key", OFFSET(key), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, FLAGS }, \ 105 { "value", "set metadata value", OFFSET(value), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, FLAGS }, \ 106 { "function", "function for comparing values", OFFSET(function), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, METADATAF_NB-1, FLAGS, "function" }, \ 107 { "same_str", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_SAME_STR }, 0, 3, FLAGS, "function" }, \ 108 { "starts_with", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_STARTS_WITH }, 0, 0, FLAGS, "function" }, \ 109 { "less", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_LESS }, 0, 3, FLAGS, "function" }, \ 110 { "equal", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_EQUAL }, 0, 3, FLAGS, "function" }, \ 111 { "greater", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_GREATER }, 0, 3, FLAGS, "function" }, \ 112 { "expr", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_EXPR }, 0, 3, FLAGS, "function" }, \ 113 { "ends_with", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_ENDS_WITH }, 0, 0, FLAGS, "function" }, \ 114 { "expr", "set expression for expr function", OFFSET(expr_str), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, FLAGS }, \ 115 { "file", "set file where to print metadata information", OFFSET(file_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS }, \ 116 { "direct", "reduce buffering when printing to user-set file or pipe", OFFSET(direct), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS }, \ 122 return !strcmp(value1, value2);
127 return !strncmp(value1, value2, strlen(value2));
132 const int len1 = strlen(value1);
133 const int len2 = strlen(value2);
135 return !strncmp(value1 +
FFMAX(len1 - len2, 0), value2, len2);
142 if (sscanf(value1,
"%f", &f1) + sscanf(value2,
"%f", &f2) != 2)
145 return fabsf(f1 - f2) < FLT_EPSILON;
152 if (sscanf(value1,
"%f", &f1) + sscanf(value2,
"%f", &f2) != 2)
155 return (f1 - f2) < FLT_EPSILON;
162 if (sscanf(value1,
"%f", &f1) + sscanf(value2,
"%f", &f2) != 2)
165 return (f2 - f1) < FLT_EPSILON;
172 if (sscanf(value1,
"%lf", &f1) + sscanf(value2,
"%lf", &f2) != 2)
183 va_list argument_list;
185 va_start(argument_list, msg);
188 va_end(argument_list);
194 va_list argument_list;
196 va_start(argument_list, msg);
199 vsnprintf(buf,
sizeof(buf), msg, argument_list);
202 va_end(argument_list);
336 s->
print(ctx,
"frame:%-4"PRId64
" pts:%-7s pts_time:%s\n",
343 s->
print(ctx,
"frame:%-4"PRId64
" pts:%-7s pts_time:%s\n",
364 #if CONFIG_AMETADATA_FILTER 390 .priv_class = &ametadata_class,
399 #if CONFIG_METADATA_FILTER 425 .priv_class = &metadata_class,
int avio_open(AVIOContext **s, const char *url, int flags)
Create and initialize a AVIOContext for accessing the resource indicated by url.
void(* print)(AVFilterContext *ctx, const char *msg,...) av_printf_format(2
This structure describes decoded (raw) audio or video data.
size_t static size_t av_strnlen(const char *s, size_t len)
Get the count of continuous non zero chars starting from the beginning.
#define AV_LOG_WARNING
Something somehow does not look correct.
Main libavfilter public API header.
#define AV_OPT_FLAG_AUDIO_PARAM
#define AVIO_FLAG_WRITE
write-only
int(* compare)(struct MetadataContext *s, const char *value1, const char *value2)
int av_expr_parse(AVExpr **expr, const char *s, const char *const *const_names, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), int log_offset, void *log_ctx)
Parse an expression.
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
const char * name
Pad name.
#define av_assert0(cond)
assert() equivalent, that is always enabled.
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
timestamp utils, mostly useful for debugging/logging purposes
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
AVIOContext * avio_context
AVDictionary * metadata
metadata.
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
static __device__ float fabsf(float a)
A filter pad used for either input or output.
A link between two filters.
double var_values[VAR_VARS_NB]
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define AV_OPT_FLAG_FILTERING_PARAM
a generic parameter which can be set by the user for filtering
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#define av_ts2timestr(ts, tb)
Convenience macro, the return value should be used only directly in function arguments but never stan...
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
void * priv
private data for use by the filter
void av_vlog(void *avcl, int level, const char *fmt, va_list vl)
Send the specified message to the log if the level is less than or equal to the current av_log_level...
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
AVRational time_base
Define the time base used by the PTS of the frames/samples which will pass through this link...
simple assert() macros that are a bit more flexible than ISO C assert().
int direct
avio_read and avio_write should if possible be satisfied directly instead of going through a buffer...
#define av_printf_format(fmtpos, attrpos)
common internal API header
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
static const AVFilterPad outputs[]
#define AV_LOG_INFO
Standard information.
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
#define AV_OPT_FLAG_VIDEO_PARAM
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Describe the class of an AVClass context structure.
#define AVIO_FLAG_DIRECT
Use direct mode.
const char * name
Filter name.
AVFilterLink ** outputs
array of pointers to output links
#define flags(name, subs,...)
int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
Put a description of the AVERROR code errnum in errbuf.
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
AVFilterContext * dst
dest filter
#define AVFILTER_DEFINE_CLASS(fname)
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
int avio_closep(AVIOContext **s)
Close the resource accessed by the AVIOContext *s, free it and set the pointer pointing to it to NULL...
simple arithmetic expression evaluator