| /* |
| * 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_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]; |
| } 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}, |
| { "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(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)); |
| } |
| |
| av_frame_free(&top_buf); |
| |
| return dst_buf; |
| } |
| |
| 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; |
| } |
| } |
| |
| 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 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 av_cold void uninit(AVFilterContext *ctx) |
| { |
| BlendContext *b = ctx->priv; |
| int i; |
| |
| ff_dualinput_uninit(&b->dinput); |
| for (i = 0; i < FF_ARRAY_ELEMS(b->params); i++) |
| av_expr_free(b->params[i].e); |
| } |
| |
| 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, |
| }; |
