/* * Copyright (c) 2010 Stefano Sabatini * Copyright (c) 2010 Baptiste Coudurier * Copyright (c) 2007 Bobby Bingham * * 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 */ /** * @file * overlay one video on top of another */ #include "avfilter.h" #include "formats.h" #include "libavutil/common.h" #include "libavutil/eval.h" #include "libavutil/avstring.h" #include "libavutil/pixdesc.h" #include "libavutil/imgutils.h" #include "libavutil/mathematics.h" #include "libavutil/opt.h" #include "libavutil/timestamp.h" #include "filters.h" #include "drawutils.h" #include "framesync.h" #include "video.h" #include "vf_overlay.h" typedef struct ThreadData { AVFrame *dst, *src; } ThreadData; static const char *const var_names[] = { "main_w", "W", ///< width of the main video "main_h", "H", ///< height of the main video "overlay_w", "w", ///< width of the overlay video "overlay_h", "h", ///< height of the overlay video "hsub", "vsub", "x", "y", "n", ///< number of frame "t", ///< timestamp expressed in seconds NULL }; #define MAIN 0 #define OVERLAY 1 #define R 0 #define G 1 #define B 2 #define A 3 #define Y 0 #define U 1 #define V 2 enum EvalMode { EVAL_MODE_INIT, EVAL_MODE_FRAME, EVAL_MODE_NB }; static av_cold void uninit(AVFilterContext *ctx) { OverlayContext *s = ctx->priv; ff_framesync_uninit(&s->fs); av_expr_free(s->x_pexpr); s->x_pexpr = NULL; av_expr_free(s->y_pexpr); s->y_pexpr = NULL; } static inline int normalize_xy(double d, int chroma_sub) { if (isnan(d)) return INT_MAX; return (int)d & ~((1 << chroma_sub) - 1); } static void eval_expr(AVFilterContext *ctx) { OverlayContext *s = ctx->priv; s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, NULL); s->var_values[VAR_Y] = av_expr_eval(s->y_pexpr, s->var_values, NULL); /* It is necessary if x is expressed from y */ s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, NULL); s->x = normalize_xy(s->var_values[VAR_X], s->hsub); s->y = normalize_xy(s->var_values[VAR_Y], s->vsub); } static int set_expr(AVExpr **pexpr, const char *expr, const char *option, void *log_ctx) { int ret; AVExpr *old = NULL; if (*pexpr) old = *pexpr; ret = av_expr_parse(pexpr, expr, var_names, NULL, NULL, NULL, NULL, 0, log_ctx); if (ret < 0) { av_log(log_ctx, AV_LOG_ERROR, "Error when evaluating the expression '%s' for %s\n", expr, option); *pexpr = old; return ret; } av_expr_free(old); return 0; } static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags) { OverlayContext *s = ctx->priv; int ret; if (!strcmp(cmd, "x")) ret = set_expr(&s->x_pexpr, args, cmd, ctx); else if (!strcmp(cmd, "y")) ret = set_expr(&s->y_pexpr, args, cmd, ctx); else ret = AVERROR(ENOSYS); if (ret < 0) return ret; if (s->eval_mode == EVAL_MODE_INIT) { eval_expr(ctx); av_log(ctx, AV_LOG_VERBOSE, "x:%f xi:%d y:%f yi:%d\n", s->var_values[VAR_X], s->x, s->var_values[VAR_Y], s->y); } return ret; } static const enum AVPixelFormat alpha_pix_fmts[] = { AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA, AV_PIX_FMT_GBRAP, AV_PIX_FMT_NONE }; static int query_formats(const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out) { const OverlayContext *s = ctx->priv; /* overlay formats contains alpha, for avoiding conversion with alpha information loss */ static const enum AVPixelFormat main_pix_fmts_yuv420[] = { AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_NV12, AV_PIX_FMT_NV21, AV_PIX_FMT_NONE }; static const enum AVPixelFormat overlay_pix_fmts_yuv420[] = { AV_PIX_FMT_YUVA420P, AV_PIX_FMT_NONE }; static const enum AVPixelFormat main_pix_fmts_yuv420p10[] = { AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_NONE }; static const enum AVPixelFormat overlay_pix_fmts_yuv420p10[] = { AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_NONE }; static const enum AVPixelFormat main_pix_fmts_yuv422[] = { AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_NONE }; static const enum AVPixelFormat overlay_pix_fmts_yuv422[] = { AV_PIX_FMT_YUVA422P, AV_PIX_FMT_NONE }; static const enum AVPixelFormat main_pix_fmts_yuv422p10[] = { AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_NONE }; static const enum AVPixelFormat overlay_pix_fmts_yuv422p10[] = { AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_NONE }; static const enum AVPixelFormat main_pix_fmts_yuv444[] = { AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVA444P, AV_PIX_FMT_NONE }; static const enum AVPixelFormat overlay_pix_fmts_yuv444[] = { AV_PIX_FMT_YUVA444P, AV_PIX_FMT_NONE }; static const enum AVPixelFormat main_pix_fmts_yuv444p10[] = { AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_NONE }; static const enum AVPixelFormat overlay_pix_fmts_yuv444p10[] = { AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_NONE }; static const enum AVPixelFormat main_pix_fmts_gbrp[] = { AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_NONE }; static const enum AVPixelFormat overlay_pix_fmts_gbrp[] = { AV_PIX_FMT_GBRAP, AV_PIX_FMT_NONE }; static const enum AVPixelFormat main_pix_fmts_rgb[] = { AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA, AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA, AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24, AV_PIX_FMT_NONE }; static const enum AVPixelFormat overlay_pix_fmts_rgb[] = { AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA, AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE }; const enum AVPixelFormat *main_formats, *overlay_formats; AVFilterFormats *formats; int ret; if (s->alpha_mode != AVALPHA_MODE_UNSPECIFIED) { formats = ff_make_formats_list_singleton(s->alpha_mode); ret = ff_formats_ref(formats, &cfg_in[OVERLAY]->alpha_modes); if (ret < 0) return ret; } switch (s->format) { case OVERLAY_FORMAT_YUV420: main_formats = main_pix_fmts_yuv420; overlay_formats = overlay_pix_fmts_yuv420; break; case OVERLAY_FORMAT_YUV420P10: main_formats = main_pix_fmts_yuv420p10; overlay_formats = overlay_pix_fmts_yuv420p10; break; case OVERLAY_FORMAT_YUV422: main_formats = main_pix_fmts_yuv422; overlay_formats = overlay_pix_fmts_yuv422; break; case OVERLAY_FORMAT_YUV422P10: main_formats = main_pix_fmts_yuv422p10; overlay_formats = overlay_pix_fmts_yuv422p10; break; case OVERLAY_FORMAT_YUV444: main_formats = main_pix_fmts_yuv444; overlay_formats = overlay_pix_fmts_yuv444; break; case OVERLAY_FORMAT_YUV444P10: main_formats = main_pix_fmts_yuv444p10; overlay_formats = overlay_pix_fmts_yuv444p10; break; case OVERLAY_FORMAT_RGB: main_formats = main_pix_fmts_rgb; overlay_formats = overlay_pix_fmts_rgb; break; case OVERLAY_FORMAT_GBRP: main_formats = main_pix_fmts_gbrp; overlay_formats = overlay_pix_fmts_gbrp; break; case OVERLAY_FORMAT_AUTO: return ff_set_pixel_formats_from_list2(ctx, cfg_in, cfg_out, alpha_pix_fmts); default: av_assert0(0); } formats = ff_make_pixel_format_list(main_formats); if ((ret = ff_formats_ref(formats, &cfg_in[MAIN]->formats)) < 0 || (ret = ff_formats_ref(formats, &cfg_out[MAIN]->formats)) < 0) return ret; return ff_formats_ref(ff_make_pixel_format_list(overlay_formats), &cfg_in[OVERLAY]->formats); } static int config_input_overlay(AVFilterLink *inlink) { AVFilterContext *ctx = inlink->dst; OverlayContext *s = inlink->dst->priv; int ret; const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format); av_image_fill_max_pixsteps(s->overlay_pix_step, NULL, pix_desc); /* Finish the configuration by evaluating the expressions now when both inputs are configured. */ s->var_values[VAR_MAIN_W ] = s->var_values[VAR_MW] = ctx->inputs[MAIN ]->w; s->var_values[VAR_MAIN_H ] = s->var_values[VAR_MH] = ctx->inputs[MAIN ]->h; s->var_values[VAR_OVERLAY_W] = s->var_values[VAR_OW] = ctx->inputs[OVERLAY]->w; s->var_values[VAR_OVERLAY_H] = s->var_values[VAR_OH] = ctx->inputs[OVERLAY]->h; s->var_values[VAR_HSUB] = 1<log2_chroma_w; s->var_values[VAR_VSUB] = 1<log2_chroma_h; s->var_values[VAR_X] = NAN; s->var_values[VAR_Y] = NAN; s->var_values[VAR_N] = 0; s->var_values[VAR_T] = NAN; if ((ret = set_expr(&s->x_pexpr, s->x_expr, "x", ctx)) < 0 || (ret = set_expr(&s->y_pexpr, s->y_expr, "y", ctx)) < 0) return ret; s->overlay_is_packed_rgb = ff_fill_rgba_map(s->overlay_rgba_map, inlink->format) >= 0; s->overlay_has_alpha = ff_pixfmt_is_in(inlink->format, alpha_pix_fmts); if (s->eval_mode == EVAL_MODE_INIT) { eval_expr(ctx); av_log(ctx, AV_LOG_VERBOSE, "x:%f xi:%d y:%f yi:%d\n", s->var_values[VAR_X], s->x, s->var_values[VAR_Y], s->y); } av_log(ctx, AV_LOG_VERBOSE, "main w:%d h:%d fmt:%s overlay w:%d h:%d fmt:%s\n", ctx->inputs[MAIN]->w, ctx->inputs[MAIN]->h, av_get_pix_fmt_name(ctx->inputs[MAIN]->format), ctx->inputs[OVERLAY]->w, ctx->inputs[OVERLAY]->h, av_get_pix_fmt_name(ctx->inputs[OVERLAY]->format)); return 0; } static int config_output(AVFilterLink *outlink) { AVFilterContext *ctx = outlink->src; OverlayContext *s = ctx->priv; int ret; if ((ret = ff_framesync_init_dualinput(&s->fs, ctx)) < 0) return ret; outlink->w = ctx->inputs[MAIN]->w; outlink->h = ctx->inputs[MAIN]->h; outlink->time_base = ctx->inputs[MAIN]->time_base; return ff_framesync_configure(&s->fs); } // divide by 255 and round to nearest // apply a fast variant: (X+127)/255 = ((X+127)*257+257)>>16 = ((X+128)*257)>>16 #define FAST_DIV255(x) ((((x) + 128) * 257) >> 16) // calculate the unpremultiplied alpha, applying the general equation: // alpha = alpha_overlay / ( (alpha_main + alpha_overlay) - (alpha_main * alpha_overlay) ) // (((x) << 16) - ((x) << 9) + (x)) is a faster version of: 255 * 255 * x // ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x)) is a faster version of: 255 * (x + y) // this is only needed when blending onto straight alpha main images #define UNPREMULTIPLY_ALPHA(x, y) ((((x) << 16) - ((x) << 9) + (x)) / ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x))) #define PTR_ADD(TYPE, ptr, byte_addend) ((TYPE*)((uint8_t*)ptr + (byte_addend))) #define CPTR_ADD(TYPE, ptr, byte_addend) ((const TYPE*)((const uint8_t*)ptr + (byte_addend))) /** * Blend image in src to destination buffer dst at position (x, y). */ static av_always_inline void blend_slice_packed_rgb(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int main_has_alpha, int x, int y, int overlay_straight, int main_straight, int jobnr, int nb_jobs) { OverlayContext *s = ctx->priv; int i, imax, j, jmax; const int src_w = src->width; const int src_h = src->height; const int dst_w = dst->width; const int dst_h = dst->height; uint8_t alpha; ///< the amount of overlay to blend on to main const int dr = s->main_rgba_map[R]; const int dg = s->main_rgba_map[G]; const int db = s->main_rgba_map[B]; const int da = s->main_rgba_map[A]; const int dstep = s->main_pix_step[0]; const int sr = s->overlay_rgba_map[R]; const int sg = s->overlay_rgba_map[G]; const int sb = s->overlay_rgba_map[B]; const int sa = s->overlay_rgba_map[A]; const int sstep = s->overlay_pix_step[0]; int slice_start, slice_end; uint8_t *S, *sp, *d, *dp; i = FFMAX(-y, 0); imax = FFMIN3(-y + dst_h, FFMIN(src_h, dst_h), y + src_h); slice_start = i + (imax * jobnr) / nb_jobs; slice_end = i + (imax * (jobnr+1)) / nb_jobs; sp = src->data[0] + (slice_start) * src->linesize[0]; dp = dst->data[0] + (y + slice_start) * dst->linesize[0]; for (i = slice_start; i < slice_end; i++) { j = FFMAX(-x, 0); S = sp + j * sstep; d = dp + (x+j) * dstep; for (jmax = FFMIN(-x + dst_w, src_w); j < jmax; j++) { alpha = S[sa]; // if the main channel has an alpha channel, alpha has to be calculated // to create an un-premultiplied (straight) alpha value if (main_straight && alpha != 0 && alpha != 255) { uint8_t alpha_d = d[da]; alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d); } switch (alpha) { case 0: break; case 255: d[dr] = S[sr]; d[dg] = S[sg]; d[db] = S[sb]; break; default: // main_value = main_value * (1 - alpha) + overlay_value * alpha // since alpha is in the range 0-255, the result must divided by 255 d[dr] = overlay_straight ? FAST_DIV255(d[dr] * (255 - alpha) + S[sr] * alpha) : FFMIN(FAST_DIV255(d[dr] * (255 - alpha)) + S[sr], 255); d[dg] = overlay_straight ? FAST_DIV255(d[dg] * (255 - alpha) + S[sg] * alpha) : FFMIN(FAST_DIV255(d[dg] * (255 - alpha)) + S[sg], 255); d[db] = overlay_straight ? FAST_DIV255(d[db] * (255 - alpha) + S[sb] * alpha) : FFMIN(FAST_DIV255(d[db] * (255 - alpha)) + S[sb], 255); } if (main_has_alpha) { switch (alpha) { case 0: break; case 255: d[da] = S[sa]; break; default: // apply alpha compositing: main_alpha += (1-main_alpha) * overlay_alpha d[da] += FAST_DIV255((255 - d[da]) * S[sa]); } } d += dstep; S += sstep; } dp += dst->linesize[0]; sp += src->linesize[0]; } } #define DEFINE_BLEND_PLANE(depth, T, nbits) \ static av_always_inline void blend_plane_##depth##_##nbits##bits(AVFilterContext *ctx, \ AVFrame *dst, const AVFrame *src, \ int src_w, int src_h, \ int dst_w, int dst_h, \ int i, int hsub, int vsub, \ int x, int y, \ int main_straight, \ int dst_plane, \ int dst_offset, \ int dst_step, \ int overlay_straight, \ int yuv, \ int jobnr, \ int nb_jobs) \ { \ OverlayContext *octx = ctx->priv; \ int src_wp = AV_CEIL_RSHIFT(src_w, hsub); \ int src_hp = AV_CEIL_RSHIFT(src_h, vsub); \ int dst_wp = AV_CEIL_RSHIFT(dst_w, hsub); \ int dst_hp = AV_CEIL_RSHIFT(dst_h, vsub); \ int yp = y>>vsub; \ int xp = x>>hsub; \ const T max = (1 << nbits) - 1; \ const T mid = (1 << (nbits - 1)); \ \ const int jmin = FFMAX(-yp, 0), jmax = FFMIN3(-yp + dst_hp, FFMIN(src_hp, dst_hp), yp + src_hp); \ const int kmin = FFMAX(-xp, 0), kmax = FFMIN(-xp + dst_wp, src_wp); \ const int slice_start = jmin + (jmax * jobnr) / nb_jobs; \ const int slice_end = jmin + (jmax * (jobnr + 1)) / nb_jobs; \ \ const uint8_t *sp = src->data[i] + (slice_start) * src->linesize[i]; \ uint8_t *dp = dst->data[dst_plane] \ + (yp + slice_start) * dst->linesize[dst_plane] \ + dst_offset; \ const uint8_t *ap = src->data[3] + (slice_start << vsub) * src->linesize[3]; \ const uint8_t *dap = main_straight ? dst->data[3] + ((yp + slice_start) << vsub) * dst->linesize[3] : NULL; \ \ for (int j = slice_start; j < slice_end; ++j) { \ int k = kmin; \ const T *s = (const T *)sp + k; \ const T *a = (const T *)ap + (k << hsub); \ const T *da = main_straight ? (T *)dap + ((xp + k) << hsub) : NULL; \ T *d = (T *)(dp + (xp + k) * dst_step); \ \ if (nbits == 8 && ((vsub && j+1 < src_hp) || !vsub) && octx->blend_row[i]) { \ int c = octx->blend_row[i]((uint8_t*)d, (uint8_t*)da, (uint8_t*)s, \ (uint8_t*)a, kmax - k, src->linesize[3]); \ \ s += c; \ d = PTR_ADD(T, d, dst_step * c); \ if (main_straight) \ da += (1 << hsub) * c; \ a += (1 << hsub) * c; \ k += c; \ } \ for (; k < kmax; k++) { \ int alpha_v, alpha_h, alpha; \ \ /* average alpha for color components, improve quality */ \ if (hsub && vsub && j+1 < src_hp && k+1 < src_wp) { \ const T *next_line = CPTR_ADD(T, a, src->linesize[3]); \ alpha = (a[0] + next_line[0] + \ a[1] + next_line[1]) >> 2; \ } else if (hsub || vsub) { \ alpha_h = hsub && k+1 < src_wp ? \ (a[0] + a[1]) >> 1 : a[0]; \ alpha_v = vsub && j+1 < src_hp ? \ (a[0] + *CPTR_ADD(T, a, src->linesize[3])) >> 1 : a[0]; \ alpha = (alpha_v + alpha_h) >> 1; \ } else \ alpha = a[0]; \ /* if the main channel has an alpha channel, alpha has to be calculated */ \ /* to create an un-premultiplied (straight) alpha value */ \ if (main_straight && alpha != 0 && alpha != max) { \ /* average alpha for color components, improve quality */ \ uint8_t alpha_d; \ if (hsub && vsub && j+1 < src_hp && k+1 < src_wp) { \ const T *next_line = CPTR_ADD(T, da, dst->linesize[3]); \ alpha_d = (da[0] + next_line[0] + \ da[1] + next_line[1]) >> 2; \ } else if (hsub || vsub) { \ alpha_h = hsub && k+1 < src_wp ? \ (da[0] + da[1]) >> 1 : da[0]; \ alpha_v = vsub && j+1 < src_hp ? \ (da[0] + *CPTR_ADD(T, da, dst->linesize[3])) >> 1 : da[0]; \ alpha_d = (alpha_v + alpha_h) >> 1; \ } else \ alpha_d = da[0]; \ alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d); \ } \ if (overlay_straight) { \ if (nbits > 8) \ *d = (*d * (max - alpha) + *s * alpha) / max; \ else \ *d = FAST_DIV255(*d * (255 - alpha) + *s * alpha); \ } else { \ if (nbits > 8) { \ if (i && yuv) \ *d = av_clip((*d * (max - alpha) + *s * alpha) / max + *s - mid, -mid, mid) + mid; \ else \ *d = av_clip_uintp2((*d * (max - alpha) + *s * alpha) / max + *s - (16<<(nbits-8)),\ nbits);\ } else { \ if (i && yuv) \ *d = av_clip(FAST_DIV255((*d - mid) * (max - alpha)) + *s - mid, -mid, mid) + mid; \ else \ *d = av_clip_uint8(FAST_DIV255(*d * (255 - alpha)) + *s - 16); \ } \ } \ s++; \ d = PTR_ADD(T, d, dst_step); \ if (main_straight) \ da += 1 << hsub; \ a += 1 << hsub; \ } \ dp += dst->linesize[dst_plane]; \ sp += src->linesize[i]; \ ap += (1 << vsub) * src->linesize[3]; \ if (main_straight) \ dap += (1 << vsub) * dst->linesize[3]; \ } \ } DEFINE_BLEND_PLANE(8, uint8_t, 8) DEFINE_BLEND_PLANE(16, uint16_t, 10) #define DEFINE_ALPHA_COMPOSITE(depth, T, nbits) \ static inline void alpha_composite_##depth##_##nbits##bits(const AVFrame *src, const AVFrame *dst, \ int src_w, int src_h, \ int dst_w, int dst_h, \ int x, int y, int main_straight, \ int jobnr, int nb_jobs) \ { \ T alpha; /* the amount of overlay to blend on to main */ \ const T max = (1 << nbits) - 1; \ \ const int imin = FFMAX(-y, 0), imax = FFMIN3(-y + dst_h, FFMIN(src_h, dst_h), y + src_h); \ const int jmin = FFMAX(-x, 0), jmax = FFMIN(-x + dst_w, src_w); \ const int slice_start = imin + ( imax * jobnr) / nb_jobs; \ const int slice_end = imin + ((imax * (jobnr + 1)) / nb_jobs); \ \ const uint8_t *sa = src->data[3] + (slice_start) * src->linesize[3]; \ uint8_t *da = dst->data[3] + (y + slice_start) * dst->linesize[3]; \ \ for (int i = slice_start; i < slice_end; ++i) { \ const T *s = (const T *)sa + jmin; \ T *d = (T *)da + x + jmin; \ \ for (int j = jmin; j < jmax; ++j) { \ alpha = *s; \ if (main_straight && alpha != 0 && alpha != max) { \ uint8_t alpha_d = *d; \ alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d); \ } \ if (alpha == max) \ *d = *s; \ else if (alpha > 0) { \ /* apply alpha compositing: main_alpha += (1-main_alpha) * overlay_alpha */ \ if (nbits > 8) \ *d += (max - *d) * *s / max; \ else \ *d += FAST_DIV255((max - *d) * *s); \ } \ d += 1; \ s += 1; \ } \ da += dst->linesize[3]; \ sa += src->linesize[3]; \ } \ } DEFINE_ALPHA_COMPOSITE(8, uint8_t, 8) DEFINE_ALPHA_COMPOSITE(16, uint16_t, 10) #define DEFINE_BLEND_SLICE_YUV(depth, nbits) \ static av_always_inline void blend_slice_yuv_##depth##_##nbits##bits(AVFilterContext *ctx, \ AVFrame *dst, const AVFrame *src, \ int hsub, int vsub, \ int main_straight, \ int x, int y, \ int overlay_straight, \ int jobnr, int nb_jobs) \ { \ OverlayContext *s = ctx->priv; \ const int src_w = src->width; \ const int src_h = src->height; \ const int dst_w = dst->width; \ const int dst_h = dst->height; \ \ blend_plane_##depth##_##nbits##bits(ctx, dst, src, src_w, src_h, dst_w, dst_h, 0, 0, 0, \ x, y, main_straight, s->main_desc->comp[0].plane, s->main_desc->comp[0].offset, \ s->main_desc->comp[0].step, overlay_straight, 1, jobnr, nb_jobs); \ blend_plane_##depth##_##nbits##bits(ctx, dst, src, src_w, src_h, dst_w, dst_h, 1, hsub, vsub, \ x, y, main_straight, s->main_desc->comp[1].plane, s->main_desc->comp[1].offset, \ s->main_desc->comp[1].step, overlay_straight, 1, jobnr, nb_jobs); \ blend_plane_##depth##_##nbits##bits(ctx, dst, src, src_w, src_h, dst_w, dst_h, 2, hsub, vsub, \ x, y, main_straight, s->main_desc->comp[2].plane, s->main_desc->comp[2].offset, \ s->main_desc->comp[2].step, overlay_straight, 1, jobnr, nb_jobs); \ \ if (s->main_has_alpha) \ alpha_composite_##depth##_##nbits##bits(src, dst, src_w, src_h, dst_w, dst_h, x, y, main_straight, \ jobnr, nb_jobs); \ } DEFINE_BLEND_SLICE_YUV(8, 8) DEFINE_BLEND_SLICE_YUV(16, 10) static av_always_inline void blend_slice_planar_rgb(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int hsub, int vsub, int main_straight, int x, int y, int overlay_straight, int jobnr, int nb_jobs) { OverlayContext *s = ctx->priv; const int src_w = src->width; const int src_h = src->height; const int dst_w = dst->width; const int dst_h = dst->height; blend_plane_8_8bits(ctx, dst, src, src_w, src_h, dst_w, dst_h, 0, 0, 0, x, y, main_straight, s->main_desc->comp[1].plane, s->main_desc->comp[1].offset, s->main_desc->comp[1].step, overlay_straight, 0, jobnr, nb_jobs); blend_plane_8_8bits(ctx, dst, src, src_w, src_h, dst_w, dst_h, 1, hsub, vsub, x, y, main_straight, s->main_desc->comp[2].plane, s->main_desc->comp[2].offset, s->main_desc->comp[2].step, overlay_straight, 0, jobnr, nb_jobs); blend_plane_8_8bits(ctx, dst, src, src_w, src_h, dst_w, dst_h, 2, hsub, vsub, x, y, main_straight, s->main_desc->comp[0].plane, s->main_desc->comp[0].offset, s->main_desc->comp[0].step, overlay_straight, 0, jobnr, nb_jobs); if (s->main_has_alpha) alpha_composite_8_8bits(src, dst, src_w, src_h, dst_w, dst_h, x, y, main_straight, jobnr, nb_jobs); } #define DEFINE_BLEND_SLICE_PLANAR_FMT_(format_, blend_slice_fn_suffix_, hsub_, vsub_, main_straight_, overlay_straight_) \ static int blend_slice_##format_(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \ { \ OverlayContext *s = ctx->priv; \ ThreadData *td = arg; \ blend_slice_##blend_slice_fn_suffix_(ctx, td->dst, td->src, \ hsub_, vsub_, main_straight_, \ s->x, s->y, overlay_straight_, \ jobnr, nb_jobs); \ return 0; \ } #define DEFINE_BLEND_SLICE_PLANAR_FMT(format_, blend_slice_fn_suffix_, hsub_, vsub_) \ DEFINE_BLEND_SLICE_PLANAR_FMT_(format_ ## _ss, blend_slice_fn_suffix_, hsub_, vsub_, 1, 1) \ DEFINE_BLEND_SLICE_PLANAR_FMT_(format_ ## _sp, blend_slice_fn_suffix_, hsub_, vsub_, 1, 0) \ DEFINE_BLEND_SLICE_PLANAR_FMT_(format_ ## _ps, blend_slice_fn_suffix_, hsub_, vsub_, 0, 1) \ DEFINE_BLEND_SLICE_PLANAR_FMT_(format_ ## _pp, blend_slice_fn_suffix_, hsub_, vsub_, 0, 0) // FMT FN H V DEFINE_BLEND_SLICE_PLANAR_FMT(yuv420, yuv_8_8bits, 1, 1) DEFINE_BLEND_SLICE_PLANAR_FMT(yuv420p10, yuv_16_10bits, 1, 1) DEFINE_BLEND_SLICE_PLANAR_FMT(yuv422p10, yuv_16_10bits, 1, 0) DEFINE_BLEND_SLICE_PLANAR_FMT(yuv422, yuv_8_8bits, 1, 0) DEFINE_BLEND_SLICE_PLANAR_FMT(yuv444, yuv_8_8bits, 0, 0) DEFINE_BLEND_SLICE_PLANAR_FMT(yuv444p10, yuv_16_10bits, 0, 0) DEFINE_BLEND_SLICE_PLANAR_FMT(gbrp, planar_rgb, 0, 0) #define DEFINE_BLEND_SLICE_PACKED_FMT(format_, blend_slice_fn_suffix_, main_has_alpha_, main_straight_, overlay_straight_) \ static int blend_slice_##format_(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \ { \ OverlayContext *s = ctx->priv; \ ThreadData *td = arg; \ blend_slice_packed_##blend_slice_fn_suffix_(ctx, td->dst, td->src, \ main_has_alpha_, \ s->x, s->y, \ overlay_straight_, \ main_straight_, \ jobnr, nb_jobs); \ return 0; \ } // FMT FN A MS OS DEFINE_BLEND_SLICE_PACKED_FMT(rgb, rgb, 0, 0, 1) DEFINE_BLEND_SLICE_PACKED_FMT(rgb_pm, rgb, 0, 0, 0) DEFINE_BLEND_SLICE_PACKED_FMT(rgba_ss, rgb, 1, 1, 1) DEFINE_BLEND_SLICE_PACKED_FMT(rgba_sp, rgb, 1, 1, 0) DEFINE_BLEND_SLICE_PACKED_FMT(rgba_ps, rgb, 1, 0, 1) DEFINE_BLEND_SLICE_PACKED_FMT(rgba_pp, rgb, 1, 0, 0) static int config_input_main(AVFilterLink *inlink) { OverlayContext *s = inlink->dst->priv; const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format); av_image_fill_max_pixsteps(s->main_pix_step, NULL, pix_desc); s->hsub = pix_desc->log2_chroma_w; s->vsub = pix_desc->log2_chroma_h; s->main_desc = pix_desc; s->main_is_packed_rgb = ff_fill_rgba_map(s->main_rgba_map, inlink->format) >= 0; s->main_has_alpha = ff_pixfmt_is_in(inlink->format, alpha_pix_fmts); return 0; } static int init_slice_fn(AVFilterContext *ctx) { OverlayContext *s = ctx->priv; const AVFilterLink *main = ctx->inputs[MAIN]; const AVFilterLink *overlay = ctx->inputs[OVERLAY]; const int main_straight = s->main_has_alpha && main->alpha_mode != AVALPHA_MODE_PREMULTIPLIED; const int overlay_straight = overlay->alpha_mode != AVALPHA_MODE_PREMULTIPLIED; #define ASSIGN_BLEND_SLICE(format_) \ do { \ s->blend_slice = main_straight ? (overlay_straight ? format_##_ss : format_##_sp) \ : (overlay_straight ? format_##_ps : format_##_pp); \ } while (0) switch (s->format) { case OVERLAY_FORMAT_YUV420: ASSIGN_BLEND_SLICE(blend_slice_yuv420); break; case OVERLAY_FORMAT_YUV420P10: ASSIGN_BLEND_SLICE(blend_slice_yuv420p10); break; case OVERLAY_FORMAT_YUV422: ASSIGN_BLEND_SLICE(blend_slice_yuv422); break; case OVERLAY_FORMAT_YUV422P10: ASSIGN_BLEND_SLICE(blend_slice_yuv422p10); break; case OVERLAY_FORMAT_YUV444: ASSIGN_BLEND_SLICE(blend_slice_yuv444); break; case OVERLAY_FORMAT_YUV444P10: ASSIGN_BLEND_SLICE(blend_slice_yuv444p10); break; case OVERLAY_FORMAT_RGB: if (s->main_has_alpha) ASSIGN_BLEND_SLICE(blend_slice_rgba); else s->blend_slice = overlay_straight ? blend_slice_rgb : blend_slice_rgb_pm; break; case OVERLAY_FORMAT_GBRP: ASSIGN_BLEND_SLICE(blend_slice_gbrp); break; case OVERLAY_FORMAT_AUTO: switch (main->format) { case AV_PIX_FMT_YUVA420P: ASSIGN_BLEND_SLICE(blend_slice_yuv420); break; case AV_PIX_FMT_YUVA420P10: ASSIGN_BLEND_SLICE(blend_slice_yuv420p10); break; case AV_PIX_FMT_YUVA422P: ASSIGN_BLEND_SLICE(blend_slice_yuv422); break; case AV_PIX_FMT_YUVA422P10: ASSIGN_BLEND_SLICE(blend_slice_yuv422p10); break; case AV_PIX_FMT_YUVA444P: ASSIGN_BLEND_SLICE(blend_slice_yuv444); break; case AV_PIX_FMT_YUVA444P10: ASSIGN_BLEND_SLICE(blend_slice_yuv444p10); break; case AV_PIX_FMT_ARGB: case AV_PIX_FMT_RGBA: case AV_PIX_FMT_BGRA: case AV_PIX_FMT_ABGR: ASSIGN_BLEND_SLICE(blend_slice_rgba); break; case AV_PIX_FMT_GBRAP: ASSIGN_BLEND_SLICE(blend_slice_gbrp); break; default: av_unreachable("Invalid pixel format for overlay"); break; } break; } #if ARCH_X86 && HAVE_X86ASM ff_overlay_init_x86(ctx); #endif return 0; } static int do_blend(FFFrameSync *fs) { AVFilterContext *ctx = fs->parent; AVFrame *mainpic, *second; OverlayContext *s = ctx->priv; AVFilterLink *inlink = ctx->inputs[0]; FilterLink *inl = ff_filter_link(inlink); int ret; ret = ff_framesync_dualinput_get_writable(fs, &mainpic, &second); if (ret < 0) return ret; if (!second) return ff_filter_frame(ctx->outputs[0], mainpic); if (s->eval_mode == EVAL_MODE_FRAME) { s->var_values[VAR_N] = inl->frame_count_out; s->var_values[VAR_T] = mainpic->pts == AV_NOPTS_VALUE ? NAN : mainpic->pts * av_q2d(inlink->time_base); s->var_values[VAR_OVERLAY_W] = s->var_values[VAR_OW] = second->width; s->var_values[VAR_OVERLAY_H] = s->var_values[VAR_OH] = second->height; s->var_values[VAR_MAIN_W ] = s->var_values[VAR_MW] = mainpic->width; s->var_values[VAR_MAIN_H ] = s->var_values[VAR_MH] = mainpic->height; eval_expr(ctx); av_log(ctx, AV_LOG_DEBUG, "n:%f t:%f x:%f xi:%d y:%f yi:%d\n", s->var_values[VAR_N], s->var_values[VAR_T], s->var_values[VAR_X], s->x, s->var_values[VAR_Y], s->y); } if (s->x < mainpic->width && s->x + second->width >= 0 && s->y < mainpic->height && s->y + second->height >= 0) { ThreadData td; init_slice_fn(ctx); td.dst = mainpic; td.src = second; ff_filter_execute(ctx, s->blend_slice, &td, NULL, FFMIN(FFMAX(1, FFMIN3(s->y + second->height, FFMIN(second->height, mainpic->height), mainpic->height - s->y)), ff_filter_get_nb_threads(ctx))); } return ff_filter_frame(ctx->outputs[0], mainpic); } static av_cold int init(AVFilterContext *ctx) { OverlayContext *s = ctx->priv; s->fs.on_event = do_blend; return 0; } static int activate(AVFilterContext *ctx) { OverlayContext *s = ctx->priv; return ff_framesync_activate(&s->fs); } #define OFFSET(x) offsetof(OverlayContext, x) #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM #define TFLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM static const AVOption overlay_options[] = { { "x", "set the x expression", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "0"}, 0, 0, TFLAGS }, { "y", "set the y expression", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "0"}, 0, 0, TFLAGS }, { "eof_action", "Action to take when encountering EOF from secondary input ", OFFSET(fs.opt_eof_action), AV_OPT_TYPE_INT, { .i64 = EOF_ACTION_REPEAT }, EOF_ACTION_REPEAT, EOF_ACTION_PASS, .flags = FLAGS, .unit = "eof_action" }, { "repeat", "Repeat the previous frame.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_REPEAT }, .flags = FLAGS, .unit = "eof_action" }, { "endall", "End both streams.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_ENDALL }, .flags = FLAGS, .unit = "eof_action" }, { "pass", "Pass through the main input.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_PASS }, .flags = FLAGS, .unit = "eof_action" }, { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_FRAME}, 0, EVAL_MODE_NB-1, FLAGS, .unit = "eval" }, { "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" }, { "frame", "eval expressions per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" }, { "shortest", "force termination when the shortest input terminates", OFFSET(fs.opt_shortest), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS }, { "format", "set output format", OFFSET(format), AV_OPT_TYPE_INT, {.i64=OVERLAY_FORMAT_YUV420}, 0, OVERLAY_FORMAT_NB-1, FLAGS, .unit = "format" }, { "yuv420", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV420}, .flags = FLAGS, .unit = "format" }, { "yuv420p10", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV420P10}, .flags = FLAGS, .unit = "format" }, { "yuv422", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV422}, .flags = FLAGS, .unit = "format" }, { "yuv422p10", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV422P10}, .flags = FLAGS, .unit = "format" }, { "yuv444", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV444}, .flags = FLAGS, .unit = "format" }, { "yuv444p10", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV444P10}, .flags = FLAGS, .unit = "format" }, { "rgb", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_RGB}, .flags = FLAGS, .unit = "format" }, { "gbrp", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_GBRP}, .flags = FLAGS, .unit = "format" }, { "auto", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_AUTO}, .flags = FLAGS, .unit = "format" }, { "repeatlast", "repeat overlay of the last overlay frame", OFFSET(fs.opt_repeatlast), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS }, { "alpha", "alpha format", OFFSET(alpha_mode), AV_OPT_TYPE_INT, {.i64=AVALPHA_MODE_UNSPECIFIED}, 0, AVALPHA_MODE_NB-1, FLAGS, .unit = "alpha_mode" }, { "auto", "", 0, AV_OPT_TYPE_CONST, {.i64=AVALPHA_MODE_UNSPECIFIED}, .flags = FLAGS, .unit = "alpha_mode" }, { "unknown", "", 0, AV_OPT_TYPE_CONST, {.i64=AVALPHA_MODE_UNSPECIFIED}, .flags = FLAGS, .unit = "alpha_mode" }, { "straight", "", 0, AV_OPT_TYPE_CONST, {.i64=AVALPHA_MODE_STRAIGHT}, .flags = FLAGS, .unit = "alpha_mode" }, { "premultiplied", "", 0, AV_OPT_TYPE_CONST, {.i64=AVALPHA_MODE_PREMULTIPLIED}, .flags = FLAGS, .unit = "alpha_mode" }, { NULL } }; FRAMESYNC_DEFINE_CLASS(overlay, OverlayContext, fs); static const AVFilterPad avfilter_vf_overlay_inputs[] = { { .name = "main", .type = AVMEDIA_TYPE_VIDEO, .config_props = config_input_main, }, { .name = "overlay", .type = AVMEDIA_TYPE_VIDEO, .config_props = config_input_overlay, }, }; static const AVFilterPad avfilter_vf_overlay_outputs[] = { { .name = "default", .type = AVMEDIA_TYPE_VIDEO, .config_props = config_output, }, }; const FFFilter ff_vf_overlay = { .p.name = "overlay", .p.description = NULL_IF_CONFIG_SMALL("Overlay a video source on top of the input."), .p.priv_class = &overlay_class, .p.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS, .preinit = overlay_framesync_preinit, .init = init, .uninit = uninit, .priv_size = sizeof(OverlayContext), .activate = activate, .process_command = process_command, FILTER_INPUTS(avfilter_vf_overlay_inputs), FILTER_OUTPUTS(avfilter_vf_overlay_outputs), FILTER_QUERY_FUNC2(query_formats), };