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-rw-r--r--libavfilter/vf_blend.c555
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diff --git a/libavfilter/vf_blend.c b/libavfilter/vf_blend.c
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+++ b/libavfilter/vf_blend.c
@@ -0,0 +1,555 @@
+/*
+ * 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 "dualinput.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_DIFFERENCE128,
+ 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 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 start, int end,
+ struct FilterParams *param, double *values);
+} FilterParams;
+
+typedef struct ThreadData {
+ const AVFrame *top, *bottom;
+ AVFrame *dst;
+ AVFilterLink *inlink;
+ int plane;
+ int w, h;
+ FilterParams *param;
+} ThreadData;
+
+typedef struct {
+ const AVClass *class;
+ FFDualInputContext dinput;
+ int hsub, vsub; ///< chroma subsampling values
+ int nb_planes;
+ char *all_expr;
+ enum BlendMode all_mode;
+ double all_opacity;
+
+ FilterParams params[4];
+ int tblend;
+ AVFrame *prev_frame; /* only used with tblend */
+} BlendContext;
+
+#define COMMON_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" },\
+ { "difference128", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIFFERENCE128}, 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}
+
+#define OFFSET(x) offsetof(BlendContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+
+static const AVOption blend_options[] = {
+ COMMON_OPTIONS,
+ { "shortest", "force termination when the shortest input terminates", OFFSET(dinput.shortest), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS },
+ { "repeatlast", "repeat last bottom frame", OFFSET(dinput.repeatlast), AV_OPT_TYPE_INT, {.i64=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 start, int end,
+ FilterParams *param, double *values)
+{
+ av_image_copy_plane(dst, dst_linesize, top, top_linesize, width, end - start);
+}
+
+#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 start, int end, \
+ FilterParams *param, double *values) \
+{ \
+ double opacity = param->opacity; \
+ int i, j; \
+ \
+ for (i = start; i < end; 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(difference128, av_clip_uint8(128 + 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 start, int end,
+ FilterParams *param, double *values)
+{
+ AVExpr *e = param->e;
+ int y, x;
+
+ for (y = start; y < end; 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 int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
+{
+ ThreadData *td = arg;
+ int slice_start = (td->h * jobnr ) / nb_jobs;
+ int slice_end = (td->h * (jobnr+1)) / nb_jobs;
+ const uint8_t *top = td->top->data[td->plane];
+ const uint8_t *bottom = td->bottom->data[td->plane];
+ uint8_t *dst = td->dst->data[td->plane];
+ double values[VAR_VARS_NB];
+
+ values[VAR_N] = td->inlink->frame_count;
+ values[VAR_T] = td->dst->pts == AV_NOPTS_VALUE ? NAN : td->dst->pts * av_q2d(td->inlink->time_base);
+ values[VAR_W] = td->w;
+ values[VAR_H] = td->h;
+ values[VAR_SW] = td->w / (double)td->dst->width;
+ values[VAR_SH] = td->h / (double)td->dst->height;
+
+ td->param->blend(top + slice_start * td->top->linesize[td->plane],
+ td->top->linesize[td->plane],
+ bottom + slice_start * td->bottom->linesize[td->plane],
+ td->bottom->linesize[td->plane],
+ dst + slice_start * td->dst->linesize[td->plane],
+ td->dst->linesize[td->plane],
+ td->w, slice_start, slice_end, td->param, &values[0]);
+ return 0;
+}
+
+static AVFrame *blend_frame(AVFilterContext *ctx, AVFrame *top_buf,
+ const AVFrame *bottom_buf)
+{
+ BlendContext *b = ctx->priv;
+ AVFilterLink *inlink = ctx->inputs[0];
+ AVFilterLink *outlink = ctx->outputs[0];
+ AVFrame *dst_buf;
+ int plane;
+
+ dst_buf = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!dst_buf)
+ return top_buf;
+ av_frame_copy_props(dst_buf, top_buf);
+
+ 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);
+ FilterParams *param = &b->params[plane];
+ ThreadData td = { .top = top_buf, .bottom = bottom_buf, .dst = dst_buf,
+ .w = outw, .h = outh, .param = param, .plane = plane,
+ .inlink = inlink };
+
+ ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(outh, ctx->graph->nb_threads));
+ }
+
+ if (!b->tblend)
+ av_frame_free(&top_buf);
+
+ return dst_buf;
+}
+
+static av_cold int init(AVFilterContext *ctx)
+{
+ BlendContext *b = ctx->priv;
+ int ret, plane;
+
+ b->tblend = !strcmp(ctx->filter->name, "tblend");
+
+ 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_DIFFERENCE128: param->blend = blend_difference128; 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(&param->e, param->expr_str, var_names,
+ NULL, NULL, NULL, NULL, 0, ctx);
+ if (ret < 0)
+ return ret;
+ param->blend = blend_expr;
+ }
+ }
+
+ b->dinput.process = blend_frame;
+ 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_YUVJ411P,
+ AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, 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 av_cold void uninit(AVFilterContext *ctx)
+{
+ BlendContext *b = ctx->priv;
+ int i;
+
+ ff_dualinput_uninit(&b->dinput);
+ av_freep(&b->prev_frame);
+
+ for (i = 0; i < FF_ARRAY_ELEMS(b->params); i++)
+ av_expr_free(b->params[i].e);
+}
+
+#if CONFIG_BLEND_FILTER
+
+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);
+ int ret;
+
+ 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);
+
+ if ((ret = ff_dualinput_init(ctx, &b->dinput)) < 0)
+ return ret;
+
+ return 0;
+}
+
+static int request_frame(AVFilterLink *outlink)
+{
+ BlendContext *b = outlink->src->priv;
+ return ff_dualinput_request_frame(&b->dinput, outlink);
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
+{
+ BlendContext *b = inlink->dst->priv;
+ return ff_dualinput_filter_frame(&b->dinput, inlink, buf);
+}
+
+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 ff_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,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
+};
+
+#endif
+
+#if CONFIG_TBLEND_FILTER
+
+static int tblend_config_output(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ AVFilterLink *inlink = ctx->inputs[0];
+ BlendContext *b = ctx->priv;
+ const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
+
+ b->hsub = pix_desc->log2_chroma_w;
+ b->vsub = pix_desc->log2_chroma_h;
+ b->nb_planes = av_pix_fmt_count_planes(inlink->format);
+ outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
+
+ return 0;
+}
+
+static int tblend_filter_frame(AVFilterLink *inlink, AVFrame *frame)
+{
+ BlendContext *b = inlink->dst->priv;
+ AVFilterLink *outlink = inlink->dst->outputs[0];
+
+ if (b->prev_frame) {
+ AVFrame *out = blend_frame(inlink->dst, frame, b->prev_frame);
+ av_frame_free(&b->prev_frame);
+ b->prev_frame = frame;
+ return ff_filter_frame(outlink, out);
+ }
+ b->prev_frame = frame;
+ return 0;
+}
+
+static const AVOption tblend_options[] = {
+ COMMON_OPTIONS,
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(tblend);
+
+static const AVFilterPad tblend_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = tblend_filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad tblend_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = tblend_config_output,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_tblend = {
+ .name = "tblend",
+ .description = NULL_IF_CONFIG_SMALL("Blend successive frames."),
+ .priv_size = sizeof(BlendContext),
+ .priv_class = &tblend_class,
+ .query_formats = query_formats,
+ .init = init,
+ .uninit = uninit,
+ .inputs = tblend_inputs,
+ .outputs = tblend_outputs,
+ .flags = AVFILTER_FLAG_SLICE_THREADS,
+};
+
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-09 19:52:15 +0000