This source file includes following definitions.
- query_formats
- displace_planar
- displace_packed
- process_frame
- config_input
- config_output
- activate
- uninit
#include "libavutil/imgutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "formats.h"
#include "framesync.h"
#include "internal.h"
#include "video.h"
enum EdgeMode {
EDGE_BLANK,
EDGE_SMEAR,
EDGE_WRAP,
EDGE_MIRROR,
EDGE_NB
};
typedef struct DisplaceContext {
const AVClass *class;
int width[4], height[4];
enum EdgeMode edge;
int nb_planes;
int nb_components;
int step;
uint8_t blank[4];
FFFrameSync fs;
void (*displace)(struct DisplaceContext *s, const AVFrame *in,
const AVFrame *xpic, const AVFrame *ypic, AVFrame *out);
} DisplaceContext;
#define OFFSET(x) offsetof(DisplaceContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption displace_options[] = {
{ "edge", "set edge mode", OFFSET(edge), AV_OPT_TYPE_INT, {.i64=EDGE_SMEAR}, 0, EDGE_NB-1, FLAGS, "edge" },
{ "blank", "", 0, AV_OPT_TYPE_CONST, {.i64=EDGE_BLANK}, 0, 0, FLAGS, "edge" },
{ "smear", "", 0, AV_OPT_TYPE_CONST, {.i64=EDGE_SMEAR}, 0, 0, FLAGS, "edge" },
{ "wrap" , "", 0, AV_OPT_TYPE_CONST, {.i64=EDGE_WRAP}, 0, 0, FLAGS, "edge" },
{ "mirror" , "", 0, AV_OPT_TYPE_CONST, {.i64=EDGE_MIRROR}, 0, 0, FLAGS, "edge" },
{ NULL }
};
AVFILTER_DEFINE_CLASS(displace);
static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR, AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE
};
return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
}
static void displace_planar(DisplaceContext *s, const AVFrame *in,
const AVFrame *xpic, const AVFrame *ypic,
AVFrame *out)
{
int plane, x, y;
for (plane = 0; plane < s->nb_planes; plane++) {
const int h = s->height[plane];
const int w = s->width[plane];
const int dlinesize = out->linesize[plane];
const int slinesize = in->linesize[plane];
const int xlinesize = xpic->linesize[plane];
const int ylinesize = ypic->linesize[plane];
const uint8_t *src = in->data[plane];
const uint8_t *ysrc = ypic->data[plane];
const uint8_t *xsrc = xpic->data[plane];
uint8_t *dst = out->data[plane];
const uint8_t blank = s->blank[plane];
for (y = 0; y < h; y++) {
switch (s->edge) {
case EDGE_BLANK:
for (x = 0; x < w; x++) {
int Y = y + ysrc[x] - 128;
int X = x + xsrc[x] - 128;
if (Y < 0 || Y >= h || X < 0 || X >= w)
dst[x] = blank;
else
dst[x] = src[Y * slinesize + X];
}
break;
case EDGE_SMEAR:
for (x = 0; x < w; x++) {
int Y = av_clip(y + ysrc[x] - 128, 0, h - 1);
int X = av_clip(x + xsrc[x] - 128, 0, w - 1);
dst[x] = src[Y * slinesize + X];
}
break;
case EDGE_WRAP:
for (x = 0; x < w; x++) {
int Y = (y + ysrc[x] - 128) % h;
int X = (x + xsrc[x] - 128) % w;
if (Y < 0)
Y += h;
if (X < 0)
X += w;
dst[x] = src[Y * slinesize + X];
}
break;
case EDGE_MIRROR:
for (x = 0; x < w; x++) {
int Y = y + ysrc[x] - 128;
int X = x + xsrc[x] - 128;
if (Y < 0)
Y = (-Y) % h;
if (X < 0)
X = (-X) % w;
if (Y >= h)
Y = h - (Y % h) - 1;
if (X >= w)
X = w - (X % w) - 1;
dst[x] = src[Y * slinesize + X];
}
break;
}
ysrc += ylinesize;
xsrc += xlinesize;
dst += dlinesize;
}
}
}
static void displace_packed(DisplaceContext *s, const AVFrame *in,
const AVFrame *xpic, const AVFrame *ypic,
AVFrame *out)
{
const int step = s->step;
const int h = s->height[0];
const int w = s->width[0];
const int dlinesize = out->linesize[0];
const int slinesize = in->linesize[0];
const int xlinesize = xpic->linesize[0];
const int ylinesize = ypic->linesize[0];
const uint8_t *src = in->data[0];
const uint8_t *ysrc = ypic->data[0];
const uint8_t *xsrc = xpic->data[0];
const uint8_t *blank = s->blank;
uint8_t *dst = out->data[0];
int c, x, y;
for (y = 0; y < h; y++) {
switch (s->edge) {
case EDGE_BLANK:
for (x = 0; x < w; x++) {
for (c = 0; c < s->nb_components; c++) {
int Y = y + (ysrc[x * step + c] - 128);
int X = x + (xsrc[x * step + c] - 128);
if (Y < 0 || Y >= h || X < 0 || X >= w)
dst[x * step + c] = blank[c];
else
dst[x * step + c] = src[Y * slinesize + X * step + c];
}
}
break;
case EDGE_SMEAR:
for (x = 0; x < w; x++) {
for (c = 0; c < s->nb_components; c++) {
int Y = av_clip(y + (ysrc[x * step + c] - 128), 0, h - 1);
int X = av_clip(x + (xsrc[x * step + c] - 128), 0, w - 1);
dst[x * step + c] = src[Y * slinesize + X * step + c];
}
}
break;
case EDGE_WRAP:
for (x = 0; x < w; x++) {
for (c = 0; c < s->nb_components; c++) {
int Y = (y + (ysrc[x * step + c] - 128)) % h;
int X = (x + (xsrc[x * step + c] - 128)) % w;
if (Y < 0)
Y += h;
if (X < 0)
X += w;
dst[x * step + c] = src[Y * slinesize + X * step + c];
}
}
break;
case EDGE_MIRROR:
for (x = 0; x < w; x++) {
for (c = 0; c < s->nb_components; c++) {
int Y = y + ysrc[x * step + c] - 128;
int X = x + xsrc[x * step + c] - 128;
if (Y < 0)
Y = (-Y) % h;
if (X < 0)
X = (-X) % w;
if (Y >= h)
Y = h - (Y % h) - 1;
if (X >= w)
X = w - (X % w) - 1;
dst[x * step + c] = src[Y * slinesize + X * step + c];
}
}
break;
}
ysrc += ylinesize;
xsrc += xlinesize;
dst += dlinesize;
}
}
static int process_frame(FFFrameSync *fs)
{
AVFilterContext *ctx = fs->parent;
DisplaceContext *s = fs->opaque;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out, *in, *xpic, *ypic;
int ret;
if ((ret = ff_framesync_get_frame(&s->fs, 0, &in, 0)) < 0 ||
(ret = ff_framesync_get_frame(&s->fs, 1, &xpic, 0)) < 0 ||
(ret = ff_framesync_get_frame(&s->fs, 2, &ypic, 0)) < 0)
return ret;
if (ctx->is_disabled) {
out = av_frame_clone(in);
if (!out)
return AVERROR(ENOMEM);
} else {
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out)
return AVERROR(ENOMEM);
av_frame_copy_props(out, in);
s->displace(s, in, xpic, ypic, out);
}
out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
return ff_filter_frame(outlink, out);
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
DisplaceContext *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int vsub, hsub;
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
s->nb_components = desc->nb_components;
if (s->nb_planes > 1 || s->nb_components == 1)
s->displace = displace_planar;
else
s->displace = displace_packed;
if (!(desc->flags & AV_PIX_FMT_FLAG_RGB)) {
s->blank[1] = s->blank[2] = 128;
s->blank[0] = 16;
}
s->step = av_get_padded_bits_per_pixel(desc) >> 3;
hsub = desc->log2_chroma_w;
vsub = desc->log2_chroma_h;
s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
s->height[0] = s->height[3] = inlink->h;
s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
s->width[0] = s->width[3] = inlink->w;
return 0;
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
DisplaceContext *s = ctx->priv;
AVFilterLink *srclink = ctx->inputs[0];
AVFilterLink *xlink = ctx->inputs[1];
AVFilterLink *ylink = ctx->inputs[2];
FFFrameSyncIn *in;
int ret;
if (srclink->format != xlink->format ||
srclink->format != ylink->format) {
av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
return AVERROR(EINVAL);
}
if (srclink->w != xlink->w ||
srclink->h != xlink->h ||
srclink->w != ylink->w ||
srclink->h != ylink->h) {
av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
"(size %dx%d) do not match the corresponding "
"second input link %s parameters (%dx%d) "
"and/or third input link %s parameters (%dx%d)\n",
ctx->input_pads[0].name, srclink->w, srclink->h,
ctx->input_pads[1].name, xlink->w, xlink->h,
ctx->input_pads[2].name, ylink->w, ylink->h);
return AVERROR(EINVAL);
}
outlink->w = srclink->w;
outlink->h = srclink->h;
outlink->sample_aspect_ratio = srclink->sample_aspect_ratio;
outlink->frame_rate = srclink->frame_rate;
ret = ff_framesync_init(&s->fs, ctx, 3);
if (ret < 0)
return ret;
in = s->fs.in;
in[0].time_base = srclink->time_base;
in[1].time_base = xlink->time_base;
in[2].time_base = ylink->time_base;
in[0].sync = 2;
in[0].before = EXT_STOP;
in[0].after = EXT_STOP;
in[1].sync = 1;
in[1].before = EXT_NULL;
in[1].after = EXT_INFINITY;
in[2].sync = 1;
in[2].before = EXT_NULL;
in[2].after = EXT_INFINITY;
s->fs.opaque = s;
s->fs.on_event = process_frame;
ret = ff_framesync_configure(&s->fs);
outlink->time_base = s->fs.time_base;
return ret;
}
static int activate(AVFilterContext *ctx)
{
DisplaceContext *s = ctx->priv;
return ff_framesync_activate(&s->fs);
}
static av_cold void uninit(AVFilterContext *ctx)
{
DisplaceContext *s = ctx->priv;
ff_framesync_uninit(&s->fs);
}
static const AVFilterPad displace_inputs[] = {
{
.name = "source",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input,
},
{
.name = "xmap",
.type = AVMEDIA_TYPE_VIDEO,
},
{
.name = "ymap",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
static const AVFilterPad displace_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
{ NULL }
};
AVFilter ff_vf_displace = {
.name = "displace",
.description = NULL_IF_CONFIG_SMALL("Displace pixels."),
.priv_size = sizeof(DisplaceContext),
.uninit = uninit,
.query_formats = query_formats,
.activate = activate,
.inputs = displace_inputs,
.outputs = displace_outputs,
.priv_class = &displace_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
};