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69 #define OFFSET(x) offsetof(DejudderContext, x)
70 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
73 {
"cycle",
"set the length of the cycle to use for dejuddering",
98 s->ringbuff =
av_calloc(
s->cycle + 2,
sizeof(*
s->ringbuff));
107 s->start_count =
s->cycle + 2;
132 if (
s->start_count) {
134 s->new_pts = next_pts * 2 *
s->cycle;
136 if (next_pts < judbuff[
s->i2]) {
137 offset = next_pts + judbuff[
s->i3] - judbuff[
s->i4] - judbuff[
s->i1];
138 for (k = 0; k <
s->cycle + 2; k++)
141 s->new_pts += (
s->cycle - 1) * (judbuff[
s->i3] - judbuff[
s->i1])
142 + (
s->cycle + 1) * (next_pts - judbuff[
s->i4]);
145 judbuff[
s->i2] = next_pts;
149 s->i4 = (
s->i4 + 1) % (
s->cycle + 2);
153 for (k = 0; k <
s->cycle + 2; k++)
180 .priv_class = &dejudder_class,
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
static const AVFilterPad dejudder_inputs[]
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
static const AVFilterPad dejudder_outputs[]
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
This structure describes decoded (raw) audio or video data.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
#define AV_LOG_VERBOSE
Detailed information.
const char * name
Filter name.
A link between two filters.
A filter pad used for either input or output.
static av_cold int dejudder_init(AVFilterContext *ctx)
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
AVRational frame_rate
Frame rate of the stream on the link, or 1/0 if unknown or variable; if left to 0/0,...
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
#define FILTER_INPUTS(array)
static av_cold void dejudder_uninit(AVFilterContext *ctx)
static const AVOption dejudder_options[]
Describe the class of an AVClass context structure.
AVFilterLink ** inputs
array of pointers to input links
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
static AVRational av_make_q(int num, int den)
Create an AVRational.
#define AV_NOPTS_VALUE
Undefined timestamp value.
AVFilterContext * src
source filter
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
const AVFilter ff_vf_dejudder
const char * name
Pad name.
void * av_calloc(size_t nmemb, size_t size)
AVFILTER_DEFINE_CLASS(dejudder)
AVRational time_base
Define the time base used by the PTS of the frames/samples which will pass through this link.
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
static int config_out_props(AVFilterLink *outlink)
#define FILTER_OUTPUTS(array)