mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-12 19:18:44 +02:00
50e66726a2
This should fix several issues with odd dimensions inputs. lut, vflip, pad and crop video filters also need to be checked for such issues. It's possible sws is also affected.
464 lines
19 KiB
C
464 lines
19 KiB
C
/*
|
|
* Copyright (c) 2013 Paul B Mahol
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/imgutils.h"
|
|
#include "libavutil/eval.h"
|
|
#include "libavutil/opt.h"
|
|
#include "libavutil/pixfmt.h"
|
|
#include "avfilter.h"
|
|
#include "bufferqueue.h"
|
|
#include "formats.h"
|
|
#include "internal.h"
|
|
#include "video.h"
|
|
|
|
#define TOP 0
|
|
#define BOTTOM 1
|
|
|
|
enum BlendMode {
|
|
BLEND_UNSET = -1,
|
|
BLEND_NORMAL,
|
|
BLEND_ADDITION,
|
|
BLEND_AND,
|
|
BLEND_AVERAGE,
|
|
BLEND_BURN,
|
|
BLEND_DARKEN,
|
|
BLEND_DIFFERENCE,
|
|
BLEND_DIVIDE,
|
|
BLEND_DODGE,
|
|
BLEND_EXCLUSION,
|
|
BLEND_HARDLIGHT,
|
|
BLEND_LIGHTEN,
|
|
BLEND_MULTIPLY,
|
|
BLEND_NEGATION,
|
|
BLEND_OR,
|
|
BLEND_OVERLAY,
|
|
BLEND_PHOENIX,
|
|
BLEND_PINLIGHT,
|
|
BLEND_REFLECT,
|
|
BLEND_SCREEN,
|
|
BLEND_SOFTLIGHT,
|
|
BLEND_SUBTRACT,
|
|
BLEND_VIVIDLIGHT,
|
|
BLEND_XOR,
|
|
BLEND_NB
|
|
};
|
|
|
|
static const char *const var_names[] = { "X", "Y", "W", "H", "SW", "SH", "T", "N", "A", "B", "TOP", "BOTTOM", NULL };
|
|
enum { VAR_X, VAR_Y, VAR_W, VAR_H, VAR_SW, VAR_SH, VAR_T, VAR_N, VAR_A, VAR_B, VAR_TOP, VAR_BOTTOM, VAR_VARS_NB };
|
|
|
|
typedef struct FilterParams {
|
|
enum BlendMode mode;
|
|
double values[VAR_VARS_NB];
|
|
double opacity;
|
|
AVExpr *e;
|
|
char *expr_str;
|
|
void (*blend)(const uint8_t *top, int top_linesize,
|
|
const uint8_t *bottom, int bottom_linesize,
|
|
uint8_t *dst, int dst_linesize,
|
|
int width, int height, struct FilterParams *param);
|
|
} FilterParams;
|
|
|
|
typedef struct {
|
|
const AVClass *class;
|
|
struct FFBufQueue queue_top;
|
|
struct FFBufQueue queue_bottom;
|
|
int hsub, vsub; ///< chroma subsampling values
|
|
int nb_planes;
|
|
int frame_requested;
|
|
char *all_expr;
|
|
enum BlendMode all_mode;
|
|
double all_opacity;
|
|
|
|
FilterParams params[4];
|
|
} BlendContext;
|
|
|
|
#define OFFSET(x) offsetof(BlendContext, x)
|
|
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
|
|
|
|
static const AVOption blend_options[] = {
|
|
{ "c0_mode", "set component #0 blend mode", OFFSET(params[0].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},
|
|
{ "c1_mode", "set component #1 blend mode", OFFSET(params[1].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},
|
|
{ "c2_mode", "set component #2 blend mode", OFFSET(params[2].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},
|
|
{ "c3_mode", "set component #3 blend mode", OFFSET(params[3].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},
|
|
{ "all_mode", "set blend mode for all components", OFFSET(all_mode), AV_OPT_TYPE_INT, {.i64=-1},-1, BLEND_NB-1, FLAGS, "mode"},
|
|
{ "addition", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_ADDITION}, 0, 0, FLAGS, "mode" },
|
|
{ "and", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AND}, 0, 0, FLAGS, "mode" },
|
|
{ "average", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AVERAGE}, 0, 0, FLAGS, "mode" },
|
|
{ "burn", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_BURN}, 0, 0, FLAGS, "mode" },
|
|
{ "darken", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DARKEN}, 0, 0, FLAGS, "mode" },
|
|
{ "difference", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIFFERENCE}, 0, 0, FLAGS, "mode" },
|
|
{ "divide", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIVIDE}, 0, 0, FLAGS, "mode" },
|
|
{ "dodge", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DODGE}, 0, 0, FLAGS, "mode" },
|
|
{ "exclusion", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_EXCLUSION}, 0, 0, FLAGS, "mode" },
|
|
{ "hardlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDLIGHT}, 0, 0, FLAGS, "mode" },
|
|
{ "lighten", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LIGHTEN}, 0, 0, FLAGS, "mode" },
|
|
{ "multiply", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY}, 0, 0, FLAGS, "mode" },
|
|
{ "negation", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NEGATION}, 0, 0, FLAGS, "mode" },
|
|
{ "normal", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NORMAL}, 0, 0, FLAGS, "mode" },
|
|
{ "or", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OR}, 0, 0, FLAGS, "mode" },
|
|
{ "overlay", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OVERLAY}, 0, 0, FLAGS, "mode" },
|
|
{ "phoenix", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PHOENIX}, 0, 0, FLAGS, "mode" },
|
|
{ "pinlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PINLIGHT}, 0, 0, FLAGS, "mode" },
|
|
{ "reflect", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_REFLECT}, 0, 0, FLAGS, "mode" },
|
|
{ "screen", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SCREEN}, 0, 0, FLAGS, "mode" },
|
|
{ "softlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SOFTLIGHT}, 0, 0, FLAGS, "mode" },
|
|
{ "subtract", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SUBTRACT}, 0, 0, FLAGS, "mode" },
|
|
{ "vividlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_VIVIDLIGHT}, 0, 0, FLAGS, "mode" },
|
|
{ "xor", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_XOR}, 0, 0, FLAGS, "mode" },
|
|
{ "c0_expr", "set color component #0 expression", OFFSET(params[0].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
|
|
{ "c1_expr", "set color component #1 expression", OFFSET(params[1].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
|
|
{ "c2_expr", "set color component #2 expression", OFFSET(params[2].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
|
|
{ "c3_expr", "set color component #3 expression", OFFSET(params[3].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
|
|
{ "all_expr", "set expression for all color components", OFFSET(all_expr), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
|
|
{ "c0_opacity", "set color component #0 opacity", OFFSET(params[0].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
|
|
{ "c1_opacity", "set color component #1 opacity", OFFSET(params[1].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
|
|
{ "c2_opacity", "set color component #2 opacity", OFFSET(params[2].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
|
|
{ "c3_opacity", "set color component #3 opacity", OFFSET(params[3].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
|
|
{ "all_opacity", "set opacity for all color components", OFFSET(all_opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
|
|
{ NULL },
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(blend);
|
|
|
|
static void blend_normal(const uint8_t *top, int top_linesize,
|
|
const uint8_t *bottom, int bottom_linesize,
|
|
uint8_t *dst, int dst_linesize,
|
|
int width, int height, FilterParams *param)
|
|
{
|
|
av_image_copy_plane(dst, dst_linesize, top, top_linesize, width, height);
|
|
}
|
|
|
|
#define DEFINE_BLEND(name, expr) \
|
|
static void blend_## name(const uint8_t *top, int top_linesize, \
|
|
const uint8_t *bottom, int bottom_linesize, \
|
|
uint8_t *dst, int dst_linesize, \
|
|
int width, int height, FilterParams *param) \
|
|
{ \
|
|
double opacity = param->opacity; \
|
|
int i, j; \
|
|
\
|
|
for (i = 0; i < height; i++) { \
|
|
for (j = 0; j < width; j++) { \
|
|
dst[j] = top[j] + ((expr) - top[j]) * opacity; \
|
|
} \
|
|
dst += dst_linesize; \
|
|
top += top_linesize; \
|
|
bottom += bottom_linesize; \
|
|
} \
|
|
}
|
|
|
|
#define A top[j]
|
|
#define B bottom[j]
|
|
|
|
#define MULTIPLY(x, a, b) (x * ((a * b) / 255))
|
|
#define SCREEN(x, a, b) (255 - x * ((255 - a) * (255 - b) / 255))
|
|
#define BURN(a, b) ((a == 0) ? a : FFMAX(0, 255 - ((255 - b) << 8) / a))
|
|
#define DODGE(a, b) ((a == 255) ? a : FFMIN(255, ((b << 8) / (255 - a))))
|
|
|
|
DEFINE_BLEND(addition, FFMIN(255, A + B))
|
|
DEFINE_BLEND(average, (A + B) / 2)
|
|
DEFINE_BLEND(subtract, FFMAX(0, A - B))
|
|
DEFINE_BLEND(multiply, MULTIPLY(1, A, B))
|
|
DEFINE_BLEND(negation, 255 - FFABS(255 - A - B))
|
|
DEFINE_BLEND(difference, FFABS(A - B))
|
|
DEFINE_BLEND(screen, SCREEN(1, A, B))
|
|
DEFINE_BLEND(overlay, (A < 128) ? MULTIPLY(2, A, B) : SCREEN(2, A, B))
|
|
DEFINE_BLEND(hardlight, (B < 128) ? MULTIPLY(2, B, A) : SCREEN(2, B, A))
|
|
DEFINE_BLEND(darken, FFMIN(A, B))
|
|
DEFINE_BLEND(lighten, FFMAX(A, B))
|
|
DEFINE_BLEND(divide, ((float)A / ((float)B) * 255))
|
|
DEFINE_BLEND(dodge, DODGE(A, B))
|
|
DEFINE_BLEND(burn, BURN(A, B))
|
|
DEFINE_BLEND(softlight, (A > 127) ? B + (255 - B) * (A - 127.5) / 127.5 * (0.5 - FFABS(B - 127.5) / 255): B - B * ((127.5 - A) / 127.5) * (0.5 - FFABS(B - 127.5)/255))
|
|
DEFINE_BLEND(exclusion, A + B - 2 * A * B / 255)
|
|
DEFINE_BLEND(pinlight, (B < 128) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 128)))
|
|
DEFINE_BLEND(phoenix, FFMIN(A, B) - FFMAX(A, B) + 255)
|
|
DEFINE_BLEND(reflect, (B == 255) ? B : FFMIN(255, (A * A / (255 - B))))
|
|
DEFINE_BLEND(and, A & B)
|
|
DEFINE_BLEND(or, A | B)
|
|
DEFINE_BLEND(xor, A ^ B)
|
|
DEFINE_BLEND(vividlight, (B < 128) ? BURN(A, 2 * B) : DODGE(A, 2 * (B - 128)))
|
|
|
|
static void blend_expr(const uint8_t *top, int top_linesize,
|
|
const uint8_t *bottom, int bottom_linesize,
|
|
uint8_t *dst, int dst_linesize,
|
|
int width, int height,
|
|
FilterParams *param)
|
|
{
|
|
AVExpr *e = param->e;
|
|
double *values = param->values;
|
|
int y, x;
|
|
|
|
for (y = 0; y < height; y++) {
|
|
values[VAR_Y] = y;
|
|
for (x = 0; x < width; x++) {
|
|
values[VAR_X] = x;
|
|
values[VAR_TOP] = values[VAR_A] = top[x];
|
|
values[VAR_BOTTOM] = values[VAR_B] = bottom[x];
|
|
dst[x] = av_expr_eval(e, values, NULL);
|
|
}
|
|
dst += dst_linesize;
|
|
top += top_linesize;
|
|
bottom += bottom_linesize;
|
|
}
|
|
}
|
|
|
|
static av_cold int init(AVFilterContext *ctx)
|
|
{
|
|
BlendContext *b = ctx->priv;
|
|
int ret, plane;
|
|
|
|
for (plane = 0; plane < FF_ARRAY_ELEMS(b->params); plane++) {
|
|
FilterParams *param = &b->params[plane];
|
|
|
|
if (b->all_mode >= 0)
|
|
param->mode = b->all_mode;
|
|
if (b->all_opacity < 1)
|
|
param->opacity = b->all_opacity;
|
|
|
|
switch (param->mode) {
|
|
case BLEND_ADDITION: param->blend = blend_addition; break;
|
|
case BLEND_AND: param->blend = blend_and; break;
|
|
case BLEND_AVERAGE: param->blend = blend_average; break;
|
|
case BLEND_BURN: param->blend = blend_burn; break;
|
|
case BLEND_DARKEN: param->blend = blend_darken; break;
|
|
case BLEND_DIFFERENCE: param->blend = blend_difference; break;
|
|
case BLEND_DIVIDE: param->blend = blend_divide; break;
|
|
case BLEND_DODGE: param->blend = blend_dodge; break;
|
|
case BLEND_EXCLUSION: param->blend = blend_exclusion; break;
|
|
case BLEND_HARDLIGHT: param->blend = blend_hardlight; break;
|
|
case BLEND_LIGHTEN: param->blend = blend_lighten; break;
|
|
case BLEND_MULTIPLY: param->blend = blend_multiply; break;
|
|
case BLEND_NEGATION: param->blend = blend_negation; break;
|
|
case BLEND_NORMAL: param->blend = blend_normal; break;
|
|
case BLEND_OR: param->blend = blend_or; break;
|
|
case BLEND_OVERLAY: param->blend = blend_overlay; break;
|
|
case BLEND_PHOENIX: param->blend = blend_phoenix; break;
|
|
case BLEND_PINLIGHT: param->blend = blend_pinlight; break;
|
|
case BLEND_REFLECT: param->blend = blend_reflect; break;
|
|
case BLEND_SCREEN: param->blend = blend_screen; break;
|
|
case BLEND_SOFTLIGHT: param->blend = blend_softlight; break;
|
|
case BLEND_SUBTRACT: param->blend = blend_subtract; break;
|
|
case BLEND_VIVIDLIGHT: param->blend = blend_vividlight; break;
|
|
case BLEND_XOR: param->blend = blend_xor; break;
|
|
}
|
|
|
|
if (b->all_expr && !param->expr_str) {
|
|
param->expr_str = av_strdup(b->all_expr);
|
|
if (!param->expr_str)
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
if (param->expr_str) {
|
|
ret = av_expr_parse(¶m->e, param->expr_str, var_names,
|
|
NULL, NULL, NULL, NULL, 0, ctx);
|
|
if (ret < 0)
|
|
return ret;
|
|
param->blend = blend_expr;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int query_formats(AVFilterContext *ctx)
|
|
{
|
|
static const enum AVPixelFormat pix_fmts[] = {
|
|
AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
|
|
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P,AV_PIX_FMT_YUVJ420P,
|
|
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV410P,
|
|
AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE
|
|
};
|
|
|
|
ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
|
|
return 0;
|
|
}
|
|
|
|
static int config_output(AVFilterLink *outlink)
|
|
{
|
|
AVFilterContext *ctx = outlink->src;
|
|
AVFilterLink *toplink = ctx->inputs[TOP];
|
|
AVFilterLink *bottomlink = ctx->inputs[BOTTOM];
|
|
BlendContext *b = ctx->priv;
|
|
const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(toplink->format);
|
|
|
|
if (toplink->format != bottomlink->format) {
|
|
av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
if (toplink->w != bottomlink->w ||
|
|
toplink->h != bottomlink->h ||
|
|
toplink->sample_aspect_ratio.num != bottomlink->sample_aspect_ratio.num ||
|
|
toplink->sample_aspect_ratio.den != bottomlink->sample_aspect_ratio.den) {
|
|
av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
|
|
"(size %dx%d, SAR %d:%d) do not match the corresponding "
|
|
"second input link %s parameters (%dx%d, SAR %d:%d)\n",
|
|
ctx->input_pads[TOP].name, toplink->w, toplink->h,
|
|
toplink->sample_aspect_ratio.num,
|
|
toplink->sample_aspect_ratio.den,
|
|
ctx->input_pads[BOTTOM].name, bottomlink->w, bottomlink->h,
|
|
bottomlink->sample_aspect_ratio.num,
|
|
bottomlink->sample_aspect_ratio.den);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
outlink->w = toplink->w;
|
|
outlink->h = toplink->h;
|
|
outlink->time_base = toplink->time_base;
|
|
outlink->sample_aspect_ratio = toplink->sample_aspect_ratio;
|
|
outlink->frame_rate = toplink->frame_rate;
|
|
|
|
b->hsub = pix_desc->log2_chroma_w;
|
|
b->vsub = pix_desc->log2_chroma_h;
|
|
b->nb_planes = av_pix_fmt_count_planes(toplink->format);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
{
|
|
BlendContext *b = ctx->priv;
|
|
int i;
|
|
|
|
ff_bufqueue_discard_all(&b->queue_top);
|
|
ff_bufqueue_discard_all(&b->queue_bottom);
|
|
|
|
for (i = 0; i < FF_ARRAY_ELEMS(b->params); i++)
|
|
av_expr_free(b->params[i].e);
|
|
}
|
|
|
|
static int request_frame(AVFilterLink *outlink)
|
|
{
|
|
AVFilterContext *ctx = outlink->src;
|
|
BlendContext *b = ctx->priv;
|
|
int in, ret;
|
|
|
|
b->frame_requested = 1;
|
|
while (b->frame_requested) {
|
|
in = ff_bufqueue_peek(&b->queue_top, 0) ? BOTTOM : TOP;
|
|
ret = ff_request_frame(ctx->inputs[in]);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void blend_frame(AVFilterContext *ctx,
|
|
AVFrame *top_buf,
|
|
AVFrame *bottom_buf,
|
|
AVFrame *dst_buf)
|
|
{
|
|
BlendContext *b = ctx->priv;
|
|
AVFilterLink *inlink = ctx->inputs[0];
|
|
FilterParams *param;
|
|
int plane;
|
|
|
|
for (plane = 0; plane < b->nb_planes; plane++) {
|
|
int hsub = plane == 1 || plane == 2 ? b->hsub : 0;
|
|
int vsub = plane == 1 || plane == 2 ? b->vsub : 0;
|
|
int outw = FF_CEIL_RSHIFT(dst_buf->width, hsub);
|
|
int outh = FF_CEIL_RSHIFT(dst_buf->height, vsub);
|
|
uint8_t *dst = dst_buf->data[plane];
|
|
uint8_t *top = top_buf->data[plane];
|
|
uint8_t *bottom = bottom_buf->data[plane];
|
|
|
|
param = &b->params[plane];
|
|
param->values[VAR_N] = inlink->frame_count;
|
|
param->values[VAR_T] = dst_buf->pts == AV_NOPTS_VALUE ? NAN : dst_buf->pts * av_q2d(inlink->time_base);
|
|
param->values[VAR_W] = outw;
|
|
param->values[VAR_H] = outh;
|
|
param->values[VAR_SW] = outw / dst_buf->width;
|
|
param->values[VAR_SH] = outh / dst_buf->height;
|
|
param->blend(top, top_buf->linesize[plane],
|
|
bottom, bottom_buf->linesize[plane],
|
|
dst, dst_buf->linesize[plane], outw, outh, param);
|
|
}
|
|
}
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
|
BlendContext *b = ctx->priv;
|
|
|
|
int ret = 0;
|
|
int is_bottom = (inlink == ctx->inputs[BOTTOM]);
|
|
struct FFBufQueue *queue =
|
|
(is_bottom ? &b->queue_bottom : &b->queue_top);
|
|
ff_bufqueue_add(ctx, queue, buf);
|
|
|
|
while (1) {
|
|
AVFrame *top_buf, *bottom_buf, *out_buf;
|
|
|
|
if (!ff_bufqueue_peek(&b->queue_top, 0) ||
|
|
!ff_bufqueue_peek(&b->queue_bottom, 0)) break;
|
|
|
|
top_buf = ff_bufqueue_get(&b->queue_top);
|
|
bottom_buf = ff_bufqueue_get(&b->queue_bottom);
|
|
|
|
out_buf = ff_get_video_buffer(outlink, outlink->w, outlink->h);
|
|
if (!out_buf) {
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
av_frame_copy_props(out_buf, top_buf);
|
|
|
|
b->frame_requested = 0;
|
|
blend_frame(ctx, top_buf, bottom_buf, out_buf);
|
|
ret = ff_filter_frame(outlink, out_buf);
|
|
av_frame_free(&top_buf);
|
|
av_frame_free(&bottom_buf);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static const AVFilterPad blend_inputs[] = {
|
|
{
|
|
.name = "top",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
},{
|
|
.name = "bottom",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad blend_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_output,
|
|
.request_frame = request_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter avfilter_vf_blend = {
|
|
.name = "blend",
|
|
.description = NULL_IF_CONFIG_SMALL("Blend two video frames into each other."),
|
|
.init = init,
|
|
.uninit = uninit,
|
|
.priv_size = sizeof(BlendContext),
|
|
.query_formats = query_formats,
|
|
.inputs = blend_inputs,
|
|
.outputs = blend_outputs,
|
|
.priv_class = &blend_class,
|
|
};
|