Merge commit 'a6a750c7ef240b72ce01e9653343a0ddf247d196'
[ffmpeg.git] / libavfilter / vf_blend.c
index c9e7e7d..a121267 100644 (file)
 #include "bufferqueue.h"
 #include "formats.h"
 #include "internal.h"
+#include "dualinput.h"
 #include "video.h"
+#include "blend.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",     "A",        "B",   "TOP",   "BOTTOM",        NULL };
-enum                                   { VAR_X, VAR_Y, VAR_W, VAR_H, VAR_SW, VAR_SH, VAR_T,   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 {
+typedef struct BlendContext {
     const AVClass *class;
-    struct FFBufQueue queue_top;
-    struct FFBufQueue queue_bottom;
+    FFDualInputContext dinput;
     int hsub, vsub;             ///< chroma subsampling values
-    int frame_requested;
+    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;
 
+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 ThreadData {
+    const AVFrame *top, *bottom;
+    AVFrame *dst;
+    AVFilterLink *inlink;
+    int plane;
+    int w, h;
+    FilterParams *param;
+} ThreadData;
+
+#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" },\
+    { "addition128", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_ADDITION128}, 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" },\
+    { "freeze",     "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_FREEZE},     0, 0, FLAGS, "mode" },\
+    { "glow",       "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GLOW},       0, 0, FLAGS, "mode" },\
+    { "hardlight",  "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDLIGHT},  0, 0, FLAGS, "mode" },\
+    { "hardmix",    "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDMIX},    0, 0, FLAGS, "mode" },\
+    { "heat",       "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HEAT},       0, 0, FLAGS, "mode" },\
+    { "lighten",    "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LIGHTEN},    0, 0, FLAGS, "mode" },\
+    { "linearlight","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LINEARLIGHT},0, 0, FLAGS, "mode" },\
+    { "multiply",   "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY},   0, 0, FLAGS, "mode" },\
+    { "multiply128","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY128},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[] = {
-    { "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 },
+    COMMON_OPTIONS,
+    { "shortest",    "force termination when the shortest input terminates", OFFSET(dinput.shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
+    { "repeatlast",  "repeat last bottom frame", OFFSET(dinput.repeatlast), AV_OPT_TYPE_BOOL, {.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 height, FilterParams *param)
-{
-    av_image_copy_plane(dst, dst_linesize, top, top_linesize, width, height);
+#define COPY(src)                                                            \
+static void blend_copy ## src(const uint8_t *top, ptrdiff_t top_linesize,    \
+                            const uint8_t *bottom, ptrdiff_t bottom_linesize,\
+                            uint8_t *dst, ptrdiff_t dst_linesize,            \
+                            ptrdiff_t width, ptrdiff_t height,               \
+                            FilterParams *param, double *values, int starty) \
+{                                                                            \
+    av_image_copy_plane(dst, dst_linesize, src, src ## _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;                                    \
-    }                                                                 \
-}
+COPY(top)
+COPY(bottom)
 
-#define A top[j]
-#define B bottom[j]
+#undef COPY
 
-#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)
+static void blend_normal_8bit(const uint8_t *top, ptrdiff_t top_linesize,
+                              const uint8_t *bottom, ptrdiff_t bottom_linesize,
+                              uint8_t *dst, ptrdiff_t dst_linesize,
+                              ptrdiff_t width, ptrdiff_t height,
+                              FilterParams *param, double *values, int starty)
 {
-    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);
+    const double opacity = param->opacity;
+    int i, j;
+
+    for (i = 0; i < height; i++) {
+        for (j = 0; j < width; j++) {
+            dst[j] = top[j] * opacity + bottom[j] * (1. - opacity);
         }
         dst    += dst_linesize;
         top    += top_linesize;
@@ -219,231 +155,439 @@ static void blend_expr(const uint8_t *top, int top_linesize,
     }
 }
 
-static av_cold int init(AVFilterContext *ctx, const char *args)
+static void blend_normal_16bit(const uint8_t *_top, ptrdiff_t top_linesize,
+                                  const uint8_t *_bottom, ptrdiff_t bottom_linesize,
+                                  uint8_t *_dst, ptrdiff_t dst_linesize,
+                                  ptrdiff_t width, ptrdiff_t height,
+                                  FilterParams *param, double *values, int starty)
 {
-    BlendContext *b = ctx->priv;
-    int ret, plane;
-
-    b->class = &blend_class;
-    av_opt_set_defaults(b);
-
-    if ((ret = av_set_options_string(b, args, "=", ":")) < 0)
-        return ret;
-
-    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(&param->e, param->expr_str, var_names,
-                                NULL, NULL, NULL, NULL, 0, ctx);
-            if (ret < 0)
-                return ret;
-            param->blend = blend_expr;
+    const uint16_t *top = (uint16_t*)_top;
+    const uint16_t *bottom = (uint16_t*)_bottom;
+    uint16_t *dst = (uint16_t*)_dst;
+    const double opacity = param->opacity;
+    int i, j;
+    dst_linesize /= 2;
+    top_linesize /= 2;
+    bottom_linesize /= 2;
+
+    for (i = 0; i < height; i++) {
+        for (j = 0; j < width; j++) {
+            dst[j] = top[j] * opacity + bottom[j] * (1. - opacity);
         }
+        dst    += dst_linesize;
+        top    += top_linesize;
+        bottom += bottom_linesize;
     }
+}
 
-    return 0;
+#define DEFINE_BLEND8(name, expr)                                              \
+static void blend_## name##_8bit(const uint8_t *top, ptrdiff_t top_linesize,         \
+                                 const uint8_t *bottom, ptrdiff_t bottom_linesize,   \
+                                 uint8_t *dst, ptrdiff_t dst_linesize,               \
+                                 ptrdiff_t width, ptrdiff_t height,                \
+                                 FilterParams *param, double *values, int starty) \
+{                                                                              \
+    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;                                             \
+    }                                                                          \
 }
 
-static int query_formats(AVFilterContext *ctx)
+#define DEFINE_BLEND16(name, expr)                                             \
+static void blend_## name##_16bit(const uint8_t *_top, ptrdiff_t top_linesize,       \
+                                  const uint8_t *_bottom, ptrdiff_t bottom_linesize, \
+                                  uint8_t *_dst, ptrdiff_t dst_linesize,             \
+                                  ptrdiff_t width, ptrdiff_t height,           \
+                                  FilterParams *param, double *values, int starty)         \
+{                                                                              \
+    const uint16_t *top = (uint16_t*)_top;                                     \
+    const uint16_t *bottom = (uint16_t*)_bottom;                               \
+    uint16_t *dst = (uint16_t*)_dst;                                           \
+    double opacity = param->opacity;                                           \
+    int i, j;                                                                  \
+    dst_linesize /= 2;                                                         \
+    top_linesize /= 2;                                                         \
+    bottom_linesize /= 2;                                                      \
+                                                                               \
+    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_BLEND8(addition,   FFMIN(255, A + B))
+DEFINE_BLEND8(addition128, av_clip_uint8(A + B - 128))
+DEFINE_BLEND8(average,    (A + B) / 2)
+DEFINE_BLEND8(subtract,   FFMAX(0, A - B))
+DEFINE_BLEND8(multiply,   MULTIPLY(1, A, B))
+DEFINE_BLEND8(multiply128,av_clip_uint8((A - 128) * B / 32. + 128))
+DEFINE_BLEND8(negation,   255 - FFABS(255 - A - B))
+DEFINE_BLEND8(difference, FFABS(A - B))
+DEFINE_BLEND8(difference128, av_clip_uint8(128 + A - B))
+DEFINE_BLEND8(screen,     SCREEN(1, A, B))
+DEFINE_BLEND8(overlay,    (A < 128) ? MULTIPLY(2, A, B) : SCREEN(2, A, B))
+DEFINE_BLEND8(hardlight,  (B < 128) ? MULTIPLY(2, B, A) : SCREEN(2, B, A))
+DEFINE_BLEND8(hardmix,    (A < (255 - B)) ? 0: 255)
+DEFINE_BLEND8(heat,       (A == 0) ? 0 : 255 - FFMIN(((255 - B) * (255 - B)) / A, 255))
+DEFINE_BLEND8(freeze,     (B == 0) ? 0 : 255 - FFMIN(((255 - A) * (255 - A)) / B, 255))
+DEFINE_BLEND8(darken,     FFMIN(A, B))
+DEFINE_BLEND8(lighten,    FFMAX(A, B))
+DEFINE_BLEND8(divide,     av_clip_uint8(B == 0 ? 255 : 255 * A / B))
+DEFINE_BLEND8(dodge,      DODGE(A, B))
+DEFINE_BLEND8(burn,       BURN(A, B))
+DEFINE_BLEND8(softlight,  (A > 127) ? B + (255 - B) * (A - 127.5) / 127.5 * (0.5 - fabs(B - 127.5) / 255): B - B * ((127.5 - A) / 127.5) * (0.5 - fabs(B - 127.5)/255))
+DEFINE_BLEND8(exclusion,  A + B - 2 * A * B / 255)
+DEFINE_BLEND8(pinlight,   (B < 128) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 128)))
+DEFINE_BLEND8(phoenix,    FFMIN(A, B) - FFMAX(A, B) + 255)
+DEFINE_BLEND8(reflect,    (B == 255) ? B : FFMIN(255, (A * A / (255 - B))))
+DEFINE_BLEND8(glow,       (A == 255) ? A : FFMIN(255, (B * B / (255 - A))))
+DEFINE_BLEND8(and,        A & B)
+DEFINE_BLEND8(or,         A | B)
+DEFINE_BLEND8(xor,        A ^ B)
+DEFINE_BLEND8(vividlight, (A < 128) ? BURN(2 * A, B) : DODGE(2 * (A - 128), B))
+DEFINE_BLEND8(linearlight,av_clip_uint8((B < 128) ? B + 2 * A - 255 : B + 2 * (A - 128)))
+
+#undef MULTIPLY
+#undef SCREEN
+#undef BURN
+#undef DODGE
+
+#define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 65535))
+#define SCREEN(x, a, b)   (65535 - (x) * ((65535 - (a)) * (65535 - (b)) / 65535))
+#define BURN(a, b)        (((a) == 0) ? (a) : FFMAX(0, 65535 - ((65535 - (b)) << 16) / (a)))
+#define DODGE(a, b)       (((a) == 65535) ? (a) : FFMIN(65535, (((b) << 16) / (65535 - (a)))))
+
+DEFINE_BLEND16(addition,   FFMIN(65535, A + B))
+DEFINE_BLEND16(addition128, av_clip_uint16(A + B - 32768))
+DEFINE_BLEND16(average,    (A + B) / 2)
+DEFINE_BLEND16(subtract,   FFMAX(0, A - B))
+DEFINE_BLEND16(multiply,   MULTIPLY(1, A, B))
+DEFINE_BLEND16(multiply128, av_clip_uint16((A - 32768) * B / 8192. + 32768))
+DEFINE_BLEND16(negation,   65535 - FFABS(65535 - A - B))
+DEFINE_BLEND16(difference, FFABS(A - B))
+DEFINE_BLEND16(difference128, av_clip_uint16(32768 + A - B))
+DEFINE_BLEND16(screen,     SCREEN(1, A, B))
+DEFINE_BLEND16(overlay,    (A < 32768) ? MULTIPLY(2, A, B) : SCREEN(2, A, B))
+DEFINE_BLEND16(hardlight,  (B < 32768) ? MULTIPLY(2, B, A) : SCREEN(2, B, A))
+DEFINE_BLEND16(hardmix,    (A < (65535 - B)) ? 0: 65535)
+DEFINE_BLEND16(heat,       (A == 0) ? 0 : 65535 - FFMIN(((65535 - B) * (65535 - B)) / A, 65535))
+DEFINE_BLEND16(freeze,     (B == 0) ? 0 : 65535 - FFMIN(((65535 - A) * (65535 - A)) / B, 65535))
+DEFINE_BLEND16(darken,     FFMIN(A, B))
+DEFINE_BLEND16(lighten,    FFMAX(A, B))
+DEFINE_BLEND16(divide,     av_clip_uint16(B == 0 ? 65535 : 65535 * A / B))
+DEFINE_BLEND16(dodge,      DODGE(A, B))
+DEFINE_BLEND16(burn,       BURN(A, B))
+DEFINE_BLEND16(softlight,  (A > 32767) ? B + (65535 - B) * (A - 32767.5) / 32767.5 * (0.5 - fabs(B - 32767.5) / 65535): B - B * ((32767.5 - A) / 32767.5) * (0.5 - fabs(B - 32767.5)/65535))
+DEFINE_BLEND16(exclusion,  A + B - 2 * A * B / 65535)
+DEFINE_BLEND16(pinlight,   (B < 32768) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 32768)))
+DEFINE_BLEND16(phoenix,    FFMIN(A, B) - FFMAX(A, B) + 65535)
+DEFINE_BLEND16(reflect,    (B == 65535) ? B : FFMIN(65535, (A * A / (65535 - B))))
+DEFINE_BLEND16(glow,       (A == 65535) ? A : FFMIN(65535, (B * B / (65535 - A))))
+DEFINE_BLEND16(and,        A & B)
+DEFINE_BLEND16(or,         A | B)
+DEFINE_BLEND16(xor,        A ^ B)
+DEFINE_BLEND16(vividlight, (A < 32768) ? BURN(2 * A, B) : DODGE(2 * (A - 32768), B))
+DEFINE_BLEND16(linearlight,av_clip_uint16((B < 32768) ? B + 2 * A - 65535 : B + 2 * (A - 32768)))
+
+#define DEFINE_BLEND_EXPR(type, name, div)                                     \
+static void blend_expr_## name(const uint8_t *_top, ptrdiff_t top_linesize,          \
+                               const uint8_t *_bottom, ptrdiff_t bottom_linesize,    \
+                               uint8_t *_dst, ptrdiff_t dst_linesize,                \
+                               ptrdiff_t width, ptrdiff_t height,              \
+                               FilterParams *param, double *values, int starty) \
+{                                                                              \
+    const type *top = (type*)_top;                                             \
+    const type *bottom = (type*)_bottom;                                       \
+    type *dst = (type*)_dst;                                                   \
+    AVExpr *e = param->e;                                                      \
+    int y, x;                                                                  \
+    dst_linesize /= div;                                                       \
+    top_linesize /= div;                                                       \
+    bottom_linesize /= div;                                                    \
+                                                                               \
+    for (y = 0; y < height; y++) {                                             \
+        values[VAR_Y] = y + starty;                                            \
+        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;                                             \
+    }                                                                          \
+}
+
+DEFINE_BLEND_EXPR(uint8_t, 8bit, 1)
+DEFINE_BLEND_EXPR(uint16_t, 16bit, 2)
+
+static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 {
-    static const enum AVPixelFormat pix_fmts[] = {
-        AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
-        AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
-        AV_PIX_FMT_GBRP, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE
-    };
+    ThreadData *td = arg;
+    int slice_start = (td->h *  jobnr   ) / nb_jobs;
+    int slice_end   = (td->h * (jobnr+1)) / nb_jobs;
+    int height      = slice_end - slice_start;
+    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];
 
-    ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
+    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, height, td->param, &values[0], slice_start);
     return 0;
 }
 
-static int config_output(AVFilterLink *outlink)
+static AVFrame *blend_frame(AVFilterContext *ctx, AVFrame *top_buf,
+                            const AVFrame *bottom_buf)
 {
-    AVFilterContext *ctx = outlink->src;
-    AVFilterLink *toplink = ctx->inputs[TOP];
-    AVFilterLink *bottomlink = ctx->inputs[BOTTOM];
+    BlendContext *s = ctx->priv;
+    AVFilterLink *inlink = ctx->inputs[0];
+    AVFilterLink *outlink = ctx->outputs[0];
+    AVFrame *dst_buf;
+    int plane;
 
-    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);
+    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 < s->nb_planes; plane++) {
+        int hsub = plane == 1 || plane == 2 ? s->hsub : 0;
+        int vsub = plane == 1 || plane == 2 ? s->vsub : 0;
+        int outw = AV_CEIL_RSHIFT(dst_buf->width,  hsub);
+        int outh = AV_CEIL_RSHIFT(dst_buf->height, vsub);
+        FilterParams *param = &s->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));
     }
 
-    outlink->w = toplink->w;
-    outlink->h = bottomlink->h;
-    outlink->time_base = toplink->time_base;
-    outlink->sample_aspect_ratio = toplink->sample_aspect_ratio;
-    outlink->frame_rate = toplink->frame_rate;
-    return 0;
+    if (!s->tblend)
+        av_frame_free(&top_buf);
+
+    return dst_buf;
 }
 
-static int config_input_top(AVFilterLink *inlink)
+static av_cold int init(AVFilterContext *ctx)
 {
-    BlendContext *b = inlink->dst->priv;
-    const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
+    BlendContext *s = ctx->priv;
 
-    b->hsub = pix_desc->log2_chroma_w;
-    b->vsub = pix_desc->log2_chroma_h;
+    s->tblend = !strcmp(ctx->filter->name, "tblend");
+
+    s->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_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
+        AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
+        AV_PIX_FMT_GBRP16, AV_PIX_FMT_GRAY16,
+        AV_PIX_FMT_NONE
+    };
+
+    AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
+    if (!fmts_list)
+        return AVERROR(ENOMEM);
+    return ff_set_common_formats(ctx, fmts_list);
+}
+
 static av_cold void uninit(AVFilterContext *ctx)
 {
-    BlendContext *b = ctx->priv;
+    BlendContext *s = ctx->priv;
     int i;
 
-    av_opt_free(b);
-    ff_bufqueue_discard_all(&b->queue_top);
-    ff_bufqueue_discard_all(&b->queue_bottom);
+    ff_dualinput_uninit(&s->dinput);
+    av_frame_free(&s->prev_frame);
 
-    for (i = 0; i < FF_ARRAY_ELEMS(b->params); i++)
-        av_expr_free(b->params[i].e);
+    for (i = 0; i < FF_ARRAY_ELEMS(s->params); i++)
+        av_expr_free(s->params[i].e);
 }
 
-static int request_frame(AVFilterLink *outlink)
+void ff_blend_init(FilterParams *param, int is_16bit)
 {
-    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;
+    switch (param->mode) {
+    case BLEND_ADDITION:   param->blend = is_16bit ? blend_addition_16bit   : blend_addition_8bit;   break;
+    case BLEND_ADDITION128: param->blend = is_16bit ? blend_addition128_16bit : blend_addition128_8bit; break;
+    case BLEND_AND:        param->blend = is_16bit ? blend_and_16bit        : blend_and_8bit;        break;
+    case BLEND_AVERAGE:    param->blend = is_16bit ? blend_average_16bit    : blend_average_8bit;    break;
+    case BLEND_BURN:       param->blend = is_16bit ? blend_burn_16bit       : blend_burn_8bit;       break;
+    case BLEND_DARKEN:     param->blend = is_16bit ? blend_darken_16bit     : blend_darken_8bit;     break;
+    case BLEND_DIFFERENCE: param->blend = is_16bit ? blend_difference_16bit : blend_difference_8bit; break;
+    case BLEND_DIFFERENCE128: param->blend = is_16bit ? blend_difference128_16bit: blend_difference128_8bit; break;
+    case BLEND_DIVIDE:     param->blend = is_16bit ? blend_divide_16bit     : blend_divide_8bit;     break;
+    case BLEND_DODGE:      param->blend = is_16bit ? blend_dodge_16bit      : blend_dodge_8bit;      break;
+    case BLEND_EXCLUSION:  param->blend = is_16bit ? blend_exclusion_16bit  : blend_exclusion_8bit;  break;
+    case BLEND_FREEZE:     param->blend = is_16bit ? blend_freeze_16bit     : blend_freeze_8bit;     break;
+    case BLEND_GLOW:       param->blend = is_16bit ? blend_glow_16bit       : blend_glow_8bit;       break;
+    case BLEND_HARDLIGHT:  param->blend = is_16bit ? blend_hardlight_16bit  : blend_hardlight_8bit;  break;
+    case BLEND_HARDMIX:    param->blend = is_16bit ? blend_hardmix_16bit    : blend_hardmix_8bit;    break;
+    case BLEND_HEAT:       param->blend = is_16bit ? blend_heat_16bit       : blend_heat_8bit;       break;
+    case BLEND_LIGHTEN:    param->blend = is_16bit ? blend_lighten_16bit    : blend_lighten_8bit;    break;
+    case BLEND_LINEARLIGHT:param->blend = is_16bit ? blend_linearlight_16bit: blend_linearlight_8bit;break;
+    case BLEND_MULTIPLY:   param->blend = is_16bit ? blend_multiply_16bit   : blend_multiply_8bit;   break;
+    case BLEND_MULTIPLY128:param->blend = is_16bit ? blend_multiply128_16bit: blend_multiply128_8bit;break;
+    case BLEND_NEGATION:   param->blend = is_16bit ? blend_negation_16bit   : blend_negation_8bit;   break;
+    case BLEND_NORMAL:     param->blend = param->opacity == 1 ? blend_copytop :
+                                          param->opacity == 0 ? blend_copybottom :
+                                          is_16bit ? blend_normal_16bit     : blend_normal_8bit;     break;
+    case BLEND_OR:         param->blend = is_16bit ? blend_or_16bit         : blend_or_8bit;         break;
+    case BLEND_OVERLAY:    param->blend = is_16bit ? blend_overlay_16bit    : blend_overlay_8bit;    break;
+    case BLEND_PHOENIX:    param->blend = is_16bit ? blend_phoenix_16bit    : blend_phoenix_8bit;    break;
+    case BLEND_PINLIGHT:   param->blend = is_16bit ? blend_pinlight_16bit   : blend_pinlight_8bit;   break;
+    case BLEND_REFLECT:    param->blend = is_16bit ? blend_reflect_16bit    : blend_reflect_8bit;    break;
+    case BLEND_SCREEN:     param->blend = is_16bit ? blend_screen_16bit     : blend_screen_8bit;     break;
+    case BLEND_SOFTLIGHT:  param->blend = is_16bit ? blend_softlight_16bit  : blend_softlight_8bit;  break;
+    case BLEND_SUBTRACT:   param->blend = is_16bit ? blend_subtract_16bit   : blend_subtract_8bit;   break;
+    case BLEND_VIVIDLIGHT: param->blend = is_16bit ? blend_vividlight_16bit : blend_vividlight_8bit; break;
+    case BLEND_XOR:        param->blend = is_16bit ? blend_xor_16bit        : blend_xor_8bit;        break;
     }
-    return 0;
+
+    if (param->opacity == 0 && param->mode != BLEND_NORMAL) {
+        param->blend = blend_copytop;
+    }
+
+    if (ARCH_X86)
+        ff_blend_init_x86(param, is_16bit);
 }
 
-static void blend_frame(AVFilterContext *ctx,
-                        AVFrame *top_buf,
-                        AVFrame *bottom_buf,
-                        AVFrame *dst_buf)
+static int config_output(AVFilterLink *outlink)
 {
-    BlendContext *b = ctx->priv;
-    AVFilterLink *inlink = ctx->inputs[0];
-    FilterParams *param;
-    int plane;
+    AVFilterContext *ctx = outlink->src;
+    AVFilterLink *toplink = ctx->inputs[TOP];
+    BlendContext *s = ctx->priv;
+    const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(toplink->format);
+    int ret, plane, is_16bit;
+
+    if (!s->tblend) {
+        AVFilterLink *bottomlink = ctx->inputs[BOTTOM];
 
-    for (plane = 0; dst_buf->data[plane]; plane++) {
-        int hsub = plane == 1 || plane == 2 ? b->hsub : 0;
-        int vsub = plane == 1 || plane == 2 ? b->vsub : 0;
-        int outw = dst_buf->width  >> hsub;
-        int outh = 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_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);
+        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);
+        }
     }
-}
 
-static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
-{
-    AVFilterContext *ctx = inlink->dst;
-    AVFilterLink *outlink = ctx->outputs[0];
-    BlendContext *b = ctx->priv;
+    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;
 
-    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);
+    s->hsub = pix_desc->log2_chroma_w;
+    s->vsub = pix_desc->log2_chroma_h;
 
-    while (1) {
-        AVFrame *top_buf, *bottom_buf, *out_buf;
+    is_16bit = pix_desc->comp[0].depth == 16;
+    s->nb_planes = av_pix_fmt_count_planes(toplink->format);
 
-        if (!ff_bufqueue_peek(&b->queue_top, 0) ||
-            !ff_bufqueue_peek(&b->queue_bottom, 0)) break;
+    if (!s->tblend)
+        if ((ret = ff_dualinput_init(ctx, &s->dinput)) < 0)
+            return ret;
 
-        top_buf = ff_bufqueue_get(&b->queue_top);
-        bottom_buf = ff_bufqueue_get(&b->queue_bottom);
+    for (plane = 0; plane < FF_ARRAY_ELEMS(s->params); plane++) {
+        FilterParams *param = &s->params[plane];
 
-        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);
+        if (s->all_mode >= 0)
+            param->mode = s->all_mode;
+        if (s->all_opacity < 1)
+            param->opacity = s->all_opacity;
 
-        b->frame_requested = 0;
-        blend_frame(ctx, top_buf, bottom_buf, out_buf);
-        ret = ff_filter_frame(ctx->outputs[0], out_buf);
-        av_frame_free(&top_buf);
-        av_frame_free(&bottom_buf);
+        ff_blend_init(param, is_16bit);
+
+        if (s->all_expr && !param->expr_str) {
+            param->expr_str = av_strdup(s->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 = is_16bit? blend_expr_16bit : blend_expr_8bit;
+        }
     }
-    return ret;
+
+    return 0;
+}
+
+#if CONFIG_BLEND_FILTER
+
+static int request_frame(AVFilterLink *outlink)
+{
+    BlendContext *s = outlink->src->priv;
+    return ff_dualinput_request_frame(&s->dinput, outlink);
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
+{
+    BlendContext *s = inlink->dst->priv;
+    return ff_dualinput_filter_frame(&s->dinput, inlink, buf);
 }
 
 static const AVFilterPad blend_inputs[] = {
     {
-        .name             = "top",
-        .type             = AVMEDIA_TYPE_VIDEO,
-        .config_props     = config_input_top,
-        .filter_frame     = filter_frame,
+        .name          = "top",
+        .type          = AVMEDIA_TYPE_VIDEO,
+        .filter_frame  = filter_frame,
     },{
-        .name             = "bottom",
-        .type             = AVMEDIA_TYPE_VIDEO,
-        .filter_frame     = filter_frame,
+        .name          = "bottom",
+        .type          = AVMEDIA_TYPE_VIDEO,
+        .filter_frame  = filter_frame,
     },
     { NULL }
 };
@@ -458,7 +602,7 @@ static const AVFilterPad blend_outputs[] = {
     { NULL }
 };
 
-AVFilter avfilter_vf_blend = {
+AVFilter ff_vf_blend = {
     .name          = "blend",
     .description   = NULL_IF_CONFIG_SMALL("Blend two video frames into each other."),
     .init          = init,
@@ -468,4 +612,64 @@ AVFilter avfilter_vf_blend = {
     .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_filter_frame(AVFilterLink *inlink, AVFrame *frame)
+{
+    BlendContext *s = inlink->dst->priv;
+    AVFilterLink *outlink = inlink->dst->outputs[0];
+
+    if (s->prev_frame) {
+        AVFrame *out = blend_frame(inlink->dst, frame, s->prev_frame);
+        av_frame_free(&s->prev_frame);
+        s->prev_frame = frame;
+        return ff_filter_frame(outlink, out);
+    }
+    s->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  = 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