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36 #define OFFSET(x) offsetof(EPXContext, x)
37 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
50 const int slice_start = (in->
height * jobnr ) / nb_jobs;
53 for (
int p = 0; p < 1; p++) {
56 const int src_linesize = in->
linesize[p] / 4;
57 const int dst_linesize =
out->linesize[p] / 4;
58 const uint32_t *
src = (
const uint32_t *)in->
data[p];
59 uint32_t *dst = (uint32_t *)
out->data[p];
60 const uint32_t *src_line[3];
62 src_line[0] =
src + src_linesize *
FFMAX(slice_start - 1, 0);
63 src_line[1] =
src + src_linesize * slice_start;
64 src_line[2] =
src + src_linesize *
FFMIN(slice_start + 1,
height-1);
66 for (
int y = slice_start; y <
slice_end; y++) {
67 uint32_t *dst_line[2];
69 dst_line[0] = dst + dst_linesize*2*y;
70 dst_line[1] = dst + dst_linesize*(2*y+1);
72 for (
int x = 0; x <
width; x++) {
73 uint32_t E0,
E1,
E2, E3;
74 uint32_t
B,
D,
E,
F,
H;
77 D = src_line[1][
FFMAX(x-1, 0)];
82 if (
B !=
H &&
D !=
F) {
94 dst_line[0][x*2] = E0;
95 dst_line[0][x*2+1] =
E1;
96 dst_line[1][x*2] =
E2;
97 dst_line[1][x*2+1] = E3;
100 src_line[0] = src_line[1];
101 src_line[1] = src_line[2];
102 src_line[2] = src_line[1];
105 src_line[2] += src_linesize;
117 const int slice_start = (in->
height * jobnr ) / nb_jobs;
120 for (
int p = 0; p < 1; p++) {
123 const int src_linesize = in->
linesize[p] / 4;
124 const int dst_linesize =
out->linesize[p] / 4;
125 const uint32_t *
src = (
const uint32_t *)in->
data[p];
126 uint32_t *dst = (uint32_t *)
out->data[p];
127 const uint32_t *src_line[3];
129 src_line[0] =
src + src_linesize *
FFMAX(slice_start - 1, 0);
130 src_line[1] =
src + src_linesize * slice_start;
131 src_line[2] =
src + src_linesize *
FFMIN(slice_start + 1,
height-1);
133 for (
int y = slice_start; y <
slice_end; y++) {
134 uint32_t *dst_line[3];
136 dst_line[0] = dst + dst_linesize*3*y;
137 dst_line[1] = dst + dst_linesize*(3*y+1);
138 dst_line[2] = dst + dst_linesize*(3*y+2);
140 for (
int x = 0; x <
width; x++) {
141 uint32_t E0,
E1,
E2, E3,
E4, E5, E6, E7, E8;
144 A = src_line[0][
FFMAX(x-1, 0)];
147 D = src_line[1][
FFMAX(x-1, 0)];
150 G = src_line[2][
FFMAX(x-1, 0)];
154 if (
B !=
H &&
D !=
F) {
158 E3 = (
D ==
B &&
E !=
G) || (
D ==
H &&
E !=
A) ?
D :
E;
160 E5 = (
B ==
F &&
E != I) || (
H ==
F &&
E !=
C) ?
F :
E;
162 E7 = (
D ==
H &&
E != I) || (
H ==
F &&
E !=
G) ?
H :
E;
176 dst_line[0][x*3] = E0;
177 dst_line[0][x*3+1] =
E1;
178 dst_line[0][x*3+2] =
E2;
179 dst_line[1][x*3] = E3;
180 dst_line[1][x*3+1] =
E4;
181 dst_line[1][x*3+2] = E5;
182 dst_line[2][x*3] = E6;
183 dst_line[2][x*3+1] = E7;
184 dst_line[2][x*3+2] = E8;
187 src_line[0] = src_line[1];
188 src_line[1] = src_line[2];
189 src_line[2] = src_line[1];
192 src_line[2] += src_linesize;
276 .priv_class = &epx_class,
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
AVPixelFormat
Pixel format.
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 ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
#define FILTER_PIXFMTS_ARRAY(array)
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
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
This structure describes decoded (raw) audio or video data.
@ AV_PIX_FMT_BGRA
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
const char * name
Filter name.
A link between two filters.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
static int epx3_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static const AVOption epx_options[]
static const AVFilterPad outputs[]
static enum AVPixelFormat pix_fmts[]
A filter pad used for either input or output.
s EdgeDetect Foobar g libavfilter vf_edgedetect c libavfilter vf_foobar c edit libavfilter and add an entry for foobar following the pattern of the other filters edit libavfilter allfilters and add an entry for foobar following the pattern of the other filters configure make j< whatever > ffmpeg ffmpeg i you should get a foobar png with Lena edge detected That s your new playground is ready Some little details about what s going which in turn will define variables for the build system and the C
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
#define FILTER_INPUTS(array)
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Describe the class of an AVClass context structure.
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
@ AV_PIX_FMT_ABGR
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
int format
agreed upon media format
AVFilterContext * src
source filter
static int config_output(AVFilterLink *outlink)
@ AV_PIX_FMT_ARGB
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
AVFILTER_DEFINE_CLASS(epx)
static int epx2_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
int w
agreed upon image width
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Used for passing data between threads.
const char * name
Pad name.
#define E2(a, b)
Expand a pair of delta values (a,b) into two/four delta entries.
static const AVFilterPad inputs[]
int h
agreed upon image height
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
#define FILTER_OUTPUTS(array)
#define flags(name, subs,...)
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
int(* epx_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static av_always_inline int ff_filter_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)