48 #define OFFSET(x) offsetof(IlContext, x) 49 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM 115 int dst_linesize,
int src_linesize,
120 const int m = h >> 1;
125 for (y = 0; y < m; y++) {
126 memcpy(dst + dst_linesize * y , src + src_linesize * (y * 2 + a), w);
127 memcpy(dst + dst_linesize * (y + m), src + src_linesize * (y * 2 + b), w);
131 for (y = 0; y < m; y++) {
132 memcpy(dst + dst_linesize * y * 2 , src + src_linesize * (y * 2 + a), w);
133 memcpy(dst + dst_linesize * (y * 2 + 1), src + src_linesize * (y * 2 + b), w);
137 for (y = 0; y < m; y++) {
138 memcpy(dst + dst_linesize * (y * 2 + a), src + src_linesize * y , w);
139 memcpy(dst + dst_linesize * (y * 2 + b), src + src_linesize * (y + m), w);
208 .priv_class = &il_class,
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
int alpha_mode
FilterMode.
This structure describes decoded (raw) audio or video data.
static int query_formats(AVFilterContext *ctx)
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Main libavfilter public API header.
int h
agreed upon image height
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
AVFILTER_DEFINE_CLASS(il)
#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.
static void interleave(uint8_t *dst, uint8_t *src, int w, int h, int dst_linesize, int src_linesize, enum FilterMode mode, int swap)
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
#define AV_PIX_FMT_FLAG_ALPHA
The pixel format has an alpha channel.
static const AVOption il_options[]
static int config_input(AVFilterLink *inlink)
A filter pad used for either input or output.
A link between two filters.
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
int ff_filter_process_command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Generic processing of user supplied commands that are set in the same way as the filter options...
void * priv
private data for use by the filter
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
int w
agreed upon image width
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
int format
agreed upon media format
static const AVFilterPad outputs[]
static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Describe the class of an AVClass context structure.
int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
Fill plane linesizes for an image with pixel format pix_fmt and width width.
const char * name
Filter name.
AVFilterLink ** outputs
array of pointers to output links
#define flags(name, subs,...)
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
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
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
AVFilterContext * dst
dest filter
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 inputs[]
mode
Use these values in ebur128_init (or'ed).
static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
#define AV_CEIL_RSHIFT(a, b)