| Message ID | MN2PR04MB59812B30DF7EE4AED87EF776BAD89@MN2PR04MB5981.namprd04.prod.outlook.com |
|---|---|
| State | Superseded, archived |
| Headers | show |
| Series | [FFmpeg-devel,v5,01/12] avutil/frame: Subtitle Filtering - Add AVMediaType property to AVFrame | expand |
| Context | Check | Description |
|---|---|---|
| andriy/configurex86 | warning | Failed to apply patch |
Soft Works: > Signed-off-by: softworkz <softworkz@hotmail.com> > --- > doc/filters.texi | 104 ++++ > libavfilter/Makefile | 2 + > libavfilter/allfilters.c | 2 + > libavfilter/vf_overlay_graphicsubs.c | 731 +++++++++++++++++++++++++++ > 4 files changed, 839 insertions(+) > create mode 100644 libavfilter/vf_overlay_graphicsubs.c > > diff --git a/doc/filters.texi b/doc/filters.texi > index 9ad6031d23..a6da018259 100644 > --- a/doc/filters.texi > +++ b/doc/filters.texi > @@ -25016,6 +25016,110 @@ tools. > > @c man end VIDEO SINKS > > +@chapter Subtitle Filters > +@c man begin SUBTITLE FILTERS > + > +When you configure your FFmpeg build, you can disable any of the > +existing filters using @code{--disable-filters}. > + > +Below is a description of the currently available subtitle filters. > + > +@section graphicsub2video > + > +Renders graphic subtitles as video frames. > + > +This filter replaces the previous "sub2video" hack which did the conversion implicitly and up-front as subtitle filtering wasn't possible at that time. > +To retain compatibility with earlier sub2video command lines, this filter is being auto-inserted in those cases. > + > +For overlaying graphicsal subtitles it is recommended to use the 'overlay_graphicsubs' filter which is more efficient and takes less processing resources. > + > +This filter is still useful in cases where the overlay is done with hardware acceleration (e.g. overlay_qsv, overlay_vaapi, overlay_cuda) for preparing the overlay frames. > + > +It accepts the following parameters: > + > +@table @option > +@item size, s > +Set the size of the output video frame. > + > +@end table > + > +@subsection Examples > + > +@itemize > +@item > +Overlay PGS subtitles > +(not recommended - better use overlay_graphicsubs) > +@example > +ffmpeg -i "https://streams.videolan.org/samples/sub/PGS/Girl_With_The_Dragon_Tattoo_2%3A23%3A56.mkv" -filter_complex "[0:1]graphicsub2video[subs];[0:0][subs]overlay" output.mp4 > +@end example > + > +@item > +Overlay PGS subtitles implicitly > +The graphicsub2video is inserted automatically for compatibility with legacy command lines. > +@example > +ffmpeg -i "https://streams.videolan.org/samples/sub/PGS/Girl_With_The_Dragon_Tattoo_2%3A23%3A56.mkv" -filter_complex "[0:0][0:1]overlay" output.mp4 > +@end example > +@end itemize > + > +@section overlay_graphicsubs > + > +Overlay graphic subtitles onto a video stream. > + > +This filter can blend graphical subtitles on a video stream directly, i.e. without creating full-size alpha images first. > +The blending operation is limited to the area of the subtitle rectangles, which also means that no processing is done at times where no subtitles are to be displayed. > + > + > +It accepts the following parameters: > + > +@table @option > +@item x > +@item y > +Set the expression for the x and y coordinates of the overlaid video > +on the main video. Default value is "0" for both expressions. In case > +the expression is invalid, it is set to a huge value (meaning that the > +overlay will not be displayed within the output visible area). > + > +@item eof_action > +See @ref{framesync}. > + > +@item eval > +Set when the expressions for @option{x}, and @option{y} are evaluated. > + > +It accepts the following values: > +@table @samp > +@item init > +only evaluate expressions once during the filter initialization or > +when a command is processed > + > +@item frame > +evaluate expressions for each incoming frame > +@end table > + > +Default value is @samp{frame}. > + > +@item shortest > +See @ref{framesync}. > + > +@end table > + > +@subsection Examples > + > +@itemize > +@item > +Overlay PGS subtitles > +@example > +ffmpeg -i "https://streams.videolan.org/samples/sub/PGS/Girl_With_The_Dragon_Tattoo_2%3A23%3A56.mkv" -filter_complex "[0:1]graphicsub2video[subs];[0:0][subs]overlay" output.mp4 > +@end example > + > +@item > +Overlay PGS subtitles implicitly > +The graphicsub2video is inserted automatically for compatibility with legacy command lines. > +@example > +ffmpeg -i "https://streams.videolan.org/samples/sub/PGS/Girl_With_The_Dragon_Tattoo_2%3A23%3A56.mkv" -filter_complex "[0:0][0:1]overlay" output.mp4 > +@end example > +@end itemize > +@c man end SUBTITLE FILTERS > + > @chapter Multimedia Filters > @c man begin MULTIMEDIA FILTERS > > diff --git a/libavfilter/Makefile b/libavfilter/Makefile > index a510dd12b4..f9b33d4ead 100644 > --- a/libavfilter/Makefile > +++ b/libavfilter/Makefile > @@ -289,6 +289,7 @@ OBJS-$(CONFIG_FSPP_FILTER) += vf_fspp.o qp_table.o > OBJS-$(CONFIG_GBLUR_FILTER) += vf_gblur.o > OBJS-$(CONFIG_GEQ_FILTER) += vf_geq.o > OBJS-$(CONFIG_GRADFUN_FILTER) += vf_gradfun.o > +OBJS-$(CONFIG_GRAPHICSUB2VIDEO_FILTER) += vf_overlay_graphicsubs.o framesync.o > OBJS-$(CONFIG_GRAPHMONITOR_FILTER) += f_graphmonitor.o > OBJS-$(CONFIG_GRAYWORLD_FILTER) += vf_grayworld.o > OBJS-$(CONFIG_GREYEDGE_FILTER) += vf_colorconstancy.o > @@ -362,6 +363,7 @@ OBJS-$(CONFIG_OVERLAY_CUDA_FILTER) += vf_overlay_cuda.o framesync.o vf > OBJS-$(CONFIG_OVERLAY_OPENCL_FILTER) += vf_overlay_opencl.o opencl.o \ > opencl/overlay.o framesync.o > OBJS-$(CONFIG_OVERLAY_QSV_FILTER) += vf_overlay_qsv.o framesync.o > +OBJS-$(CONFIG_OVERLAY_GRAPHICSUBS_FILTER) += vf_overlay_graphicsubs.o framesync.o > OBJS-$(CONFIG_OVERLAY_VULKAN_FILTER) += vf_overlay_vulkan.o vulkan.o > OBJS-$(CONFIG_OWDENOISE_FILTER) += vf_owdenoise.o > OBJS-$(CONFIG_PAD_FILTER) += vf_pad.o > diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c > index b27ef6f027..ca983db5b4 100644 > --- a/libavfilter/allfilters.c > +++ b/libavfilter/allfilters.c > @@ -344,6 +344,7 @@ extern const AVFilter ff_vf_oscilloscope; > extern const AVFilter ff_vf_overlay; > extern const AVFilter ff_vf_overlay_opencl; > extern const AVFilter ff_vf_overlay_qsv; > +extern const AVFilter ff_vf_overlay_graphicsubs; > extern const AVFilter ff_vf_overlay_vulkan; > extern const AVFilter ff_vf_overlay_cuda; > extern const AVFilter ff_vf_owdenoise; > @@ -522,6 +523,7 @@ extern const AVFilter ff_avf_showvolume; > extern const AVFilter ff_avf_showwaves; > extern const AVFilter ff_avf_showwavespic; > extern const AVFilter ff_vaf_spectrumsynth; > +extern const AVFilter ff_svf_graphicsub2video; > > /* multimedia sources */ > extern const AVFilter ff_avsrc_amovie; > diff --git a/libavfilter/vf_overlay_graphicsubs.c b/libavfilter/vf_overlay_graphicsubs.c > new file mode 100644 > index 0000000000..15c07c9bc4 > --- /dev/null > +++ b/libavfilter/vf_overlay_graphicsubs.c > @@ -0,0 +1,731 @@ > +/* > + * Copyright (c) 2021 softworkz > + * > + * 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 graphical subtitles on top of a video frame > + */ > + > +#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/opt.h" > +#include "internal.h" > +#include "drawutils.h" > +#include "framesync.h" > + > +#include "libavcodec/avcodec.h" > + > +enum var_name { > + VAR_MAIN_W, VAR_MW, > + VAR_MAIN_H, VAR_MH, > + VAR_OVERLAY_W, VAR_OW, > + VAR_OVERLAY_H, VAR_OH, > + VAR_HSUB, > + VAR_VSUB, > + VAR_X, > + VAR_Y, > + VAR_N, > + VAR_POS, > + VAR_T, > + VAR_VARS_NB > +}; > + > +typedef struct OverlaySubsContext { > + const AVClass *class; > + int x, y; ///< position of overlaid picture > + int w, h; > + AVFrame *outpicref; > + > + int main_is_packed_rgb; > + uint8_t main_rgba_map[4]; > + int main_has_alpha; > + uint8_t overlay_rgba_map[4]; > + int eval_mode; ///< EvalMode > + > + FFFrameSync fs; > + > + int main_pix_step[4]; ///< steps per pixel for each plane of the main output > + int hsub, vsub; ///< chroma subsampling values > + const AVPixFmtDescriptor *main_desc; ///< format descriptor for main input > + > + double var_values[VAR_VARS_NB]; > + char *x_expr, *y_expr; > + > + AVExpr *x_pexpr, *y_pexpr; > +} OverlaySubsContext; > + > +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 > + "pos", ///< position in the file > + "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 overlay_graphicsubs_uninit(AVFilterContext *ctx) > +{ > + OverlaySubsContext *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) > +{ > + OverlaySubsContext *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 overlay_graphicsubs_query_formats(AVFilterContext *ctx) > +{ > + AVFilterFormats *formats; > + AVFilterLink *inlink0 = ctx->inputs[0]; > + AVFilterLink *inlink1 = ctx->inputs[1]; > + AVFilterLink *outlink = ctx->outputs[0]; > + int ret; > + static const enum AVSubtitleType subtitle_fmts[] = { AV_SUBTITLE_FMT_BITMAP, AV_SUBTITLE_FMT_NONE }; > + static const enum AVPixelFormat supported_pix_fmts[] = { > + AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, > + 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 > + }; > + > + /* set input0 video formats */ > + formats = ff_make_format_list(supported_pix_fmts); > + if ((ret = ff_formats_ref(formats, &inlink0->outcfg.formats)) < 0) > + return ret; > + > + /* set input1 subtitle formats */ > + formats = ff_make_format_list(subtitle_fmts); > + if ((ret = ff_formats_ref(formats, &inlink1->outcfg.formats)) < 0) > + return ret; > + > + /* set output0 video formats */ > + formats = ff_make_format_list(supported_pix_fmts); > + if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0) > + return ret; > + > + return 0; > +} > + > +static int config_output(AVFilterLink *outlink) > +{ > + AVFilterContext *ctx = outlink->src; > + OverlaySubsContext *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 non-pre-multiplied 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) > +#define UNPREMULTIPLY_ALPHA(x, y) ((((x) << 16) - ((x) << 9) + (x)) / ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x))) > + > +/** > + * Blend image in src to destination buffer dst at position (x, y). > + */ > +static av_always_inline void blend_packed_rgb(const AVFilterContext *ctx, > + const AVFrame *dst, const AVSubtitleRect *src, > + int x, int y, > + int is_straight) > +{ > + OverlaySubsContext *s = ctx->priv; > + int i, imax, j, jmax; > + const int src_w = src->w; > + const int src_h = src->h; > + 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]; > + uint32_t *pal = (uint32_t *)src->data[1]; > + 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; > + slice_end = i + imax; > + > + sp = src->data[0] + slice_start * src->linesize[0]; > + dp = dst->data[0] + (slice_start + y) * dst->linesize[0]; > + > + for (i = slice_start; i < slice_end; i++) { > + j = FFMAX(-x, 0); > + S = sp + j; > + d = dp + ((x + j) * dstep); > + > + for (jmax = FFMIN(-x + dst_w, src_w); j < jmax; j++) { > + uint32_t val = pal[*S]; > + const uint8_t *sval = (uint8_t *)&val; > + alpha = sval[sa]; > + > + // if the main channel has an alpha channel, alpha has to be calculated > + // to create an un-premultiplied (straight) alpha value > + if (s->main_has_alpha && alpha != 0 && alpha != 255) { > + const uint8_t alpha_d = d[da]; > + alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d); > + } > + > + switch (alpha) { > + case 0: > + break; > + case 255: > + d[dr] = sval[sr]; > + d[dg] = sval[sg]; > + d[db] = sval[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] = is_straight ? FAST_DIV255(d[dr] * (255 - alpha) + sval[sr] * alpha) : > + FFMIN(FAST_DIV255(d[dr] * (255 - alpha)) + sval[sr], 255); > + d[dg] = is_straight ? FAST_DIV255(d[dg] * (255 - alpha) + sval[sg] * alpha) : > + FFMIN(FAST_DIV255(d[dg] * (255 - alpha)) + sval[sg], 255); > + d[db] = is_straight ? FAST_DIV255(d[db] * (255 - alpha) + sval[sb] * alpha) : > + FFMIN(FAST_DIV255(d[db] * (255 - alpha)) + sval[sb], 255); > + } > + > + if (s->main_has_alpha) { > + switch (alpha) { > + case 0: > + break; > + case 255: > + d[da] = sval[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 += 1; > + } > + dp += dst->linesize[0]; > + sp += src->linesize[0]; > + } > +} > + > +static av_always_inline void blend_plane_8_8bits(const AVFilterContext *ctx, const AVFrame *dst, const AVSubtitleRect *src, > + const uint32_t *yuv_pal, int src_w, int src_h, int dst_w, int dst_h, int plane, int hsub, int vsub, > + int x, int y, int dst_plane, int dst_offset, int dst_step) > +{ > + const int src_wp = AV_CEIL_RSHIFT(src_w, hsub); > + const int src_hp = AV_CEIL_RSHIFT(src_h, vsub); > + const int dst_wp = AV_CEIL_RSHIFT(dst_w, hsub); > + const int dst_hp = AV_CEIL_RSHIFT(dst_h, vsub); > + const int yp = y >> vsub; > + const int xp = x >> hsub; > + uint8_t *s, *sp, *d, *dp, *dap; > + int imax, i, j, jmax; > + int slice_start, slice_end; > + > + i = FFMAX(-yp, 0); \ > + imax = FFMIN3(-yp + dst_hp, FFMIN(src_hp, dst_hp), yp + src_hp); \ > + > + slice_start = i; > + slice_end = i + imax; > + > + sp = src->data[0] + (slice_start << vsub) * src->linesize[0]; > + dp = dst->data[dst_plane] + (yp + slice_start) * dst->linesize[dst_plane] + dst_offset; > + > + dap = dst->data[3] + ((yp + slice_start) << vsub) * dst->linesize[3]; > + > + for (i = slice_start; i < slice_end; i++) { > + j = FFMAX(-xp, 0); > + d = dp + (xp + j) * dst_step; > + s = sp + (j << hsub); > + jmax = FFMIN(-xp + dst_wp, src_wp); > + > + for (; j < jmax; j++) { > + uint32_t val = yuv_pal[*s]; > + const uint8_t *sval = (uint8_t *)&val; > + const int alpha = sval[3]; > + const int max = 255, mid = 128; > + const int d_int = *d; > + const int sval_int = sval[plane]; > + > + switch (alpha) { > + case 0: > + break; > + case 255: > + *d = sval[plane]; > + break; > + default: > + if (plane > 0) > + *d = av_clip(FAST_DIV255((d_int - mid) * (max - alpha) + (sval_int - mid) * alpha) , -mid, mid) + mid; > + else > + *d = FAST_DIV255(d_int * (max - alpha) + sval_int * alpha); > + break; > + } > + > + d += dst_step; > + s += 1 << hsub; > + } > + dp += dst->linesize[dst_plane]; > + sp += (1 << vsub) * src->linesize[0]; > + dap += (1 << vsub) * dst->linesize[3]; > + } > +} > + > +#define RGB2Y(r, g, b) (uint8_t)(((66 * (r) + 129 * (g) + 25 * (b) + 128) >> 8) + 16) > +#define RGB2U(r, g, b) (uint8_t)(((-38 * (r) - 74 * (g) + 112 * (b) + 128) >> 8) + 128) > +#define RGB2V(r, g, b) (uint8_t)(((112 * (r) - 94 * (g) - 18 * (b) + 128) >> 8) + 128) > +/* Converts R8 G8 B8 color to YUV. */ > +static av_always_inline void rgb_2_yuv(uint8_t r, uint8_t g, uint8_t b, uint8_t* y, uint8_t* u, uint8_t* v) > +{ > + *y = RGB2Y((int)r, (int)g, (int)b); > + *u = RGB2U((int)r, (int)g, (int)b); > + *v = RGB2V((int)r, (int)g, (int)b); > +} > + > + > +static av_always_inline void blend_yuv_8_8bits(AVFilterContext *ctx, AVFrame *dst, const AVSubtitleRect *src, int hsub, int vsub, int x, int y) > +{ > + OverlaySubsContext *s = ctx->priv; > + const int src_w = src->w; > + const int src_h = src->h; > + const int dst_w = dst->width; > + const int dst_h = dst->height; > + 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]; > + uint32_t *pal = (uint32_t *)src->data[1]; > + uint32_t yuvpal[256]; > + > + for (int i = 0; i < 256; ++i) { > + const uint8_t *rgba = (uint8_t *)&pal[i]; > + uint8_t *yuva = (uint8_t *)&yuvpal[i]; > + rgb_2_yuv(rgba[sr], rgba[sg], rgba[sb], &yuva[Y], &yuva[U], &yuva[V]); > + yuva[3] = rgba[sa]; > + } > + > + blend_plane_8_8bits(ctx, dst, src, yuvpal, src_w, src_h, dst_w, dst_h, Y, 0, 0, x, y, s->main_desc->comp[Y].plane, s->main_desc->comp[Y].offset, s->main_desc->comp[Y].step); > + blend_plane_8_8bits(ctx, dst, src, yuvpal, src_w, src_h, dst_w, dst_h, U, hsub, vsub, x, y, s->main_desc->comp[U].plane, s->main_desc->comp[U].offset, s->main_desc->comp[U].step); > + blend_plane_8_8bits(ctx, dst, src, yuvpal, src_w, src_h, dst_w, dst_h, V, hsub, vsub, x, y, s->main_desc->comp[V].plane, s->main_desc->comp[V].offset, s->main_desc->comp[V].step); > +} > + > +static int config_input_main(AVFilterLink *inlink) > +{ > + int ret; > + AVFilterContext *ctx = inlink->dst; > + OverlaySubsContext *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); > + ff_fill_rgba_map(s->overlay_rgba_map, AV_PIX_FMT_RGB32); // it's actually AV_PIX_FMT_PAL8); > + > + 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 = !(pix_desc->flags & AV_PIX_FMT_FLAG_ALPHA); > + > + /* 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<<pix_desc->log2_chroma_w; > + s->var_values[VAR_VSUB] = 1<<pix_desc->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; > + s->var_values[VAR_POS] = 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; > + > + 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 do_blend(FFFrameSync *fs) > +{ > + AVFilterContext *ctx = fs->parent; > + AVFrame *mainpic, *second; > + OverlaySubsContext *s = ctx->priv; > + AVFilterLink *inlink = ctx->inputs[0]; > + unsigned num_rects, i; > + 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) { > + int64_t pos = mainpic->pkt_pos; > + > + s->var_values[VAR_N] = inlink->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_POS] = pos == -1 ? NAN : pos; > + > + 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 pos:%f x:%f xi:%d y:%f yi:%d\n", > + s->var_values[VAR_N], s->var_values[VAR_T], s->var_values[VAR_POS], > + s->var_values[VAR_X], s->x, > + s->var_values[VAR_Y], s->y); > + } > + > + num_rects = second->num_subtitle_rects > 1 ? 1 : second->num_subtitle_rects; > + > + for (i = 0; i < num_rects; i++) { > + const AVSubtitleRect *sub_rect = second->subtitle_rects[i]; > + > + if (sub_rect->type != AV_SUBTITLE_FMT_BITMAP) { > + av_log(NULL, AV_LOG_WARNING, "sub2video: non-bitmap subtitle\n"); > + return AVERROR_INVALIDDATA; > + } > + > + switch (inlink->format) { > + case AV_PIX_FMT_YUV420P: > + blend_yuv_8_8bits(ctx, mainpic, sub_rect, 1, 1, sub_rect->x + s->x, sub_rect->y + s->y); > + break; > + case AV_PIX_FMT_YUV422P: > + blend_yuv_8_8bits(ctx, mainpic, sub_rect, 1, 0, sub_rect->x + s->x, sub_rect->y + s->y); > + break; > + case AV_PIX_FMT_YUV444P: > + blend_yuv_8_8bits(ctx, mainpic, sub_rect, 0, 0, sub_rect->x + s->x, sub_rect->y + s->y); > + break; > + case AV_PIX_FMT_RGB24: > + case AV_PIX_FMT_BGR24: > + case AV_PIX_FMT_ARGB: > + case AV_PIX_FMT_RGBA: > + case AV_PIX_FMT_BGRA: > + case AV_PIX_FMT_ABGR: > + blend_packed_rgb(ctx, mainpic, sub_rect, sub_rect->x + s->x, sub_rect->y + s->y, 1); > + break; > + default: > + av_assert0(0); > + break; > + } > + } > + > + return ff_filter_frame(ctx->outputs[0], mainpic); > +} > + > +static av_cold int overlay_graphicsubs_init(AVFilterContext *ctx) > +{ > + OverlaySubsContext *s = ctx->priv; > + > + s->fs.on_event = do_blend; > + return 0; > +} > + > +static int overlay_graphicsubs_activate(AVFilterContext *ctx) > +{ > + OverlaySubsContext *s = ctx->priv; > + return ff_framesync_activate(&s->fs); > +} > + > +static int graphicsub2video_query_formats(AVFilterContext *ctx) > +{ > + AVFilterFormats *formats; > + AVFilterLink *inlink = ctx->inputs[0]; > + AVFilterLink *outlink = ctx->outputs[0]; > + static const enum AVSubtitleType subtitle_fmts[] = { AV_SUBTITLE_FMT_BITMAP, AV_SUBTITLE_FMT_NONE }; > + static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE }; > + int ret; > + > + /* set input subtitle formats */ > + formats = ff_make_format_list(subtitle_fmts); > + if ((ret = ff_formats_ref(formats, &inlink->outcfg.formats)) < 0) > + return ret; > + > + /* set output video formats */ > + formats = ff_make_format_list(pix_fmts); > + if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0) > + return ret; > + > + return 0; > +} > + > +static int graphicsub2video_config_input(AVFilterLink *inlink) > +{ > + AVFilterContext *ctx = inlink->dst; > + OverlaySubsContext *s = ctx->priv; > + > + if (s->w <= 0 || s->h <= 0) { > + s->w = inlink->w; > + s->h = inlink->h; > + } > + return 0; > +} > + > +static int graphicsub2video_config_output(AVFilterLink *outlink) > +{ > + const AVFilterContext *ctx = outlink->src; > + OverlaySubsContext *s = ctx->priv; > + const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(outlink->format); > + > + outlink->w = s->w; > + outlink->h = s->h; > + outlink->sample_aspect_ratio = (AVRational){1,1}; > + > + av_image_fill_max_pixsteps(s->main_pix_step, NULL, pix_desc); > + ff_fill_rgba_map(s->overlay_rgba_map, AV_PIX_FMT_RGB32); > + > + 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, outlink->format) >= 0; > + s->main_has_alpha = !(pix_desc->flags & AV_PIX_FMT_FLAG_ALPHA); > + > + return 0; > +} > + > +static int graphicsub2video_filter_frame(AVFilterLink *inlink, AVFrame *src_frame) > +{ > + AVFilterLink *outlink = inlink->dst->outputs[0]; > + AVFrame *out; > + const unsigned num_rects = src_frame->num_subtitle_rects; > + unsigned int i; > + > + out = ff_get_video_buffer(outlink, outlink->w, outlink->h); > + if (!out) > + return AVERROR(ENOMEM); > + > + memset(out->data[0], 0, out->linesize[0] * out->height); > + > + out->pts = src_frame->pts; > + > + > + for (i = 0; i < num_rects; i++) { > + const AVSubtitleRect *sub_rect = src_frame->subtitle_rects[i]; > + > + if (sub_rect->type != AV_SUBTITLE_FMT_BITMAP) { > + av_log(NULL, AV_LOG_WARNING, "sub2video: non-bitmap subtitle\n"); > + return AVERROR_INVALIDDATA; > + } > + > + blend_packed_rgb(inlink->dst, out, sub_rect, sub_rect->x, sub_rect->y, 1); > + } > + > + av_frame_free(&src_frame); > + return ff_filter_frame(outlink, out); > +} > + > +#define OFFSET(x) offsetof(OverlaySubsContext, x) > +#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM) > + > +static const AVOption overlay_graphicsubs_options[] = { > + { "x", "set the x expression", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "0"}, 0, 0, FLAGS }, > + { "y", "set the y expression", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "0"}, 0, 0, FLAGS }, > + { "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, "eof_action" }, > + { "repeat", "Repeat the previous frame.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_REPEAT }, .flags = FLAGS, "eof_action" }, > + { "endall", "End both streams.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_ENDALL }, .flags = FLAGS, "eof_action" }, > + { "pass", "Pass through the main input.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_PASS }, .flags = FLAGS, "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, "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 }, > + { "repeatlast", "repeat overlay of the last overlay frame", OFFSET(fs.opt_repeatlast), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS }, Why are you duplicating framesync options? They are already accessible (that's what the preinit and the child_next/child_class_next stuff is for). > + { NULL } > +}; > + > +static const AVOption graphicsub2video_options[] = { > + { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, FLAGS }, > + { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, FLAGS }, > + { NULL } > +}; > + > +FRAMESYNC_DEFINE_CLASS(overlay_graphicsubs, OverlaySubsContext, fs); > + > +static const AVFilterPad overlay_graphicsubs_inputs[] = { > + { > + .name = "main", > + .type = AVMEDIA_TYPE_VIDEO, > + .config_props = config_input_main, > + .flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE, > + }, > + { > + .name = "overlay", > + .type = AVMEDIA_TYPE_SUBTITLE, > + }, > +}; > + > +static const AVFilterPad overlay_graphicsubs_outputs[] = { > + { > + .name = "default", > + .type = AVMEDIA_TYPE_VIDEO, > + .config_props = config_output, > + }, > +}; > + > +const AVFilter ff_vf_overlay_graphicsubs = { > + .name = "overlay_graphicsubs", > + .description = NULL_IF_CONFIG_SMALL("Overlay graphical subtitles on top of the input."), > + .preinit = overlay_graphicsubs_framesync_preinit, > + .init = overlay_graphicsubs_init, > + .uninit = overlay_graphicsubs_uninit, > + .priv_size = sizeof(OverlaySubsContext), > + .priv_class = &overlay_graphicsubs_class, > + .query_formats = overlay_graphicsubs_query_formats, > + .activate = overlay_graphicsubs_activate, > + FILTER_INPUTS(overlay_graphicsubs_inputs), > + FILTER_OUTPUTS(overlay_graphicsubs_outputs), > +}; > + > +AVFILTER_DEFINE_CLASS(graphicsub2video); > + > +static const AVFilterPad graphicsub2video_inputs[] = { > + { > + .name = "default", > + .type = AVMEDIA_TYPE_SUBTITLE, > + .filter_frame = graphicsub2video_filter_frame, > + .config_props = graphicsub2video_config_input, > + }, > +}; > + > +static const AVFilterPad graphicsub2video_outputs[] = { > + { > + .name = "default", > + .type = AVMEDIA_TYPE_VIDEO, > + .config_props = graphicsub2video_config_output, > + }, > +}; > + > +AVFilter ff_svf_graphicsub2video = { > + .name = "graphicsub2video", > + .description = NULL_IF_CONFIG_SMALL("Convert graphical subtitles to video"), > + .query_formats = graphicsub2video_query_formats, > + .priv_size = sizeof(OverlaySubsContext), > + .priv_class = &graphicsub2video_class, > + FILTER_INPUTS(graphicsub2video_inputs), > + FILTER_OUTPUTS(graphicsub2video_outputs), > +}; >
> -----Original Message----- > From: ffmpeg-devel <ffmpeg-devel-bounces@ffmpeg.org> On Behalf Of > Andreas Rheinhardt > Sent: Sunday, 12 September 2021 22:00 > To: ffmpeg-devel@ffmpeg.org > Subject: Re: [FFmpeg-devel] [PATCH v5 08/12] > avfilter/overlay_graphicsubs: Add overlay_graphicsubs and > graphicsub2video filters > > Soft Works: > > Signed-off-by: softworkz <softworkz@hotmail.com> > > --- > > doc/filters.texi | 104 ++++ > > libavfilter/Makefile | 2 + > > libavfilter/allfilters.c | 2 + > > libavfilter/vf_overlay_graphicsubs.c | 731 > +++++++++++++++++++++++++++ > > 4 files changed, 839 insertions(+) > > create mode 100644 libavfilter/vf_overlay_graphicsubs.c > > > > diff --git a/doc/filters.texi b/doc/filters.texi > > index 9ad6031d23..a6da018259 100644 > > --- a/doc/filters.texi > > +++ b/doc/filters.texi > > @@ -25016,6 +25016,110 @@ tools. > > [..] > > + > > +#define OFFSET(x) offsetof(OverlaySubsContext, x) > > +#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | > AV_OPT_FLAG_FILTERING_PARAM) > > + > > +static const AVOption overlay_graphicsubs_options[] = { > > + { "x", "set the x expression", OFFSET(x_expr), > AV_OPT_TYPE_STRING, {.str = "0"}, 0, 0, FLAGS }, > > + { "y", "set the y expression", OFFSET(y_expr), > AV_OPT_TYPE_STRING, {.str = "0"}, 0, 0, FLAGS }, > > + { "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, > "eof_action" }, > > + { "repeat", "Repeat the previous frame.", 0, > AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_REPEAT }, .flags = FLAGS, > "eof_action" }, > > + { "endall", "End both streams.", 0, > AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_ENDALL }, .flags = FLAGS, > "eof_action" }, > > + { "pass", "Pass through the main input.", 0, > AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_PASS }, .flags = FLAGS, > "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, "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 }, > > + { "repeatlast", "repeat overlay of the last overlay frame", > OFFSET(fs.opt_repeatlast), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS }, > > Why are you duplicating framesync options? They are already > accessible > (that's what the preinit and the child_next/child_class_next stuff is > for). Both vf_overlay and vf_overlay_qsv have it that way, are you sure I can drop it? Thanks, sw
diff --git a/doc/filters.texi b/doc/filters.texi index 9ad6031d23..a6da018259 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -25016,6 +25016,110 @@ tools. @c man end VIDEO SINKS +@chapter Subtitle Filters +@c man begin SUBTITLE FILTERS + +When you configure your FFmpeg build, you can disable any of the +existing filters using @code{--disable-filters}. + +Below is a description of the currently available subtitle filters. + +@section graphicsub2video + +Renders graphic subtitles as video frames. + +This filter replaces the previous "sub2video" hack which did the conversion implicitly and up-front as subtitle filtering wasn't possible at that time. +To retain compatibility with earlier sub2video command lines, this filter is being auto-inserted in those cases. + +For overlaying graphicsal subtitles it is recommended to use the 'overlay_graphicsubs' filter which is more efficient and takes less processing resources. + +This filter is still useful in cases where the overlay is done with hardware acceleration (e.g. overlay_qsv, overlay_vaapi, overlay_cuda) for preparing the overlay frames. + +It accepts the following parameters: + +@table @option +@item size, s +Set the size of the output video frame. + +@end table + +@subsection Examples + +@itemize +@item +Overlay PGS subtitles +(not recommended - better use overlay_graphicsubs) +@example +ffmpeg -i "https://streams.videolan.org/samples/sub/PGS/Girl_With_The_Dragon_Tattoo_2%3A23%3A56.mkv" -filter_complex "[0:1]graphicsub2video[subs];[0:0][subs]overlay" output.mp4 +@end example + +@item +Overlay PGS subtitles implicitly +The graphicsub2video is inserted automatically for compatibility with legacy command lines. +@example +ffmpeg -i "https://streams.videolan.org/samples/sub/PGS/Girl_With_The_Dragon_Tattoo_2%3A23%3A56.mkv" -filter_complex "[0:0][0:1]overlay" output.mp4 +@end example +@end itemize + +@section overlay_graphicsubs + +Overlay graphic subtitles onto a video stream. + +This filter can blend graphical subtitles on a video stream directly, i.e. without creating full-size alpha images first. +The blending operation is limited to the area of the subtitle rectangles, which also means that no processing is done at times where no subtitles are to be displayed. + + +It accepts the following parameters: + +@table @option +@item x +@item y +Set the expression for the x and y coordinates of the overlaid video +on the main video. Default value is "0" for both expressions. In case +the expression is invalid, it is set to a huge value (meaning that the +overlay will not be displayed within the output visible area). + +@item eof_action +See @ref{framesync}. + +@item eval +Set when the expressions for @option{x}, and @option{y} are evaluated. + +It accepts the following values: +@table @samp +@item init +only evaluate expressions once during the filter initialization or +when a command is processed + +@item frame +evaluate expressions for each incoming frame +@end table + +Default value is @samp{frame}. + +@item shortest +See @ref{framesync}. + +@end table + +@subsection Examples + +@itemize +@item +Overlay PGS subtitles +@example +ffmpeg -i "https://streams.videolan.org/samples/sub/PGS/Girl_With_The_Dragon_Tattoo_2%3A23%3A56.mkv" -filter_complex "[0:1]graphicsub2video[subs];[0:0][subs]overlay" output.mp4 +@end example + +@item +Overlay PGS subtitles implicitly +The graphicsub2video is inserted automatically for compatibility with legacy command lines. +@example +ffmpeg -i "https://streams.videolan.org/samples/sub/PGS/Girl_With_The_Dragon_Tattoo_2%3A23%3A56.mkv" -filter_complex "[0:0][0:1]overlay" output.mp4 +@end example +@end itemize +@c man end SUBTITLE FILTERS + @chapter Multimedia Filters @c man begin MULTIMEDIA FILTERS diff --git a/libavfilter/Makefile b/libavfilter/Makefile index a510dd12b4..f9b33d4ead 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -289,6 +289,7 @@ OBJS-$(CONFIG_FSPP_FILTER) += vf_fspp.o qp_table.o OBJS-$(CONFIG_GBLUR_FILTER) += vf_gblur.o OBJS-$(CONFIG_GEQ_FILTER) += vf_geq.o OBJS-$(CONFIG_GRADFUN_FILTER) += vf_gradfun.o +OBJS-$(CONFIG_GRAPHICSUB2VIDEO_FILTER) += vf_overlay_graphicsubs.o framesync.o OBJS-$(CONFIG_GRAPHMONITOR_FILTER) += f_graphmonitor.o OBJS-$(CONFIG_GRAYWORLD_FILTER) += vf_grayworld.o OBJS-$(CONFIG_GREYEDGE_FILTER) += vf_colorconstancy.o @@ -362,6 +363,7 @@ OBJS-$(CONFIG_OVERLAY_CUDA_FILTER) += vf_overlay_cuda.o framesync.o vf OBJS-$(CONFIG_OVERLAY_OPENCL_FILTER) += vf_overlay_opencl.o opencl.o \ opencl/overlay.o framesync.o OBJS-$(CONFIG_OVERLAY_QSV_FILTER) += vf_overlay_qsv.o framesync.o +OBJS-$(CONFIG_OVERLAY_GRAPHICSUBS_FILTER) += vf_overlay_graphicsubs.o framesync.o OBJS-$(CONFIG_OVERLAY_VULKAN_FILTER) += vf_overlay_vulkan.o vulkan.o OBJS-$(CONFIG_OWDENOISE_FILTER) += vf_owdenoise.o OBJS-$(CONFIG_PAD_FILTER) += vf_pad.o diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c index b27ef6f027..ca983db5b4 100644 --- a/libavfilter/allfilters.c +++ b/libavfilter/allfilters.c @@ -344,6 +344,7 @@ extern const AVFilter ff_vf_oscilloscope; extern const AVFilter ff_vf_overlay; extern const AVFilter ff_vf_overlay_opencl; extern const AVFilter ff_vf_overlay_qsv; +extern const AVFilter ff_vf_overlay_graphicsubs; extern const AVFilter ff_vf_overlay_vulkan; extern const AVFilter ff_vf_overlay_cuda; extern const AVFilter ff_vf_owdenoise; @@ -522,6 +523,7 @@ extern const AVFilter ff_avf_showvolume; extern const AVFilter ff_avf_showwaves; extern const AVFilter ff_avf_showwavespic; extern const AVFilter ff_vaf_spectrumsynth; +extern const AVFilter ff_svf_graphicsub2video; /* multimedia sources */ extern const AVFilter ff_avsrc_amovie; diff --git a/libavfilter/vf_overlay_graphicsubs.c b/libavfilter/vf_overlay_graphicsubs.c new file mode 100644 index 0000000000..15c07c9bc4 --- /dev/null +++ b/libavfilter/vf_overlay_graphicsubs.c @@ -0,0 +1,731 @@ +/* + * Copyright (c) 2021 softworkz + * + * 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 graphical subtitles on top of a video frame + */ + +#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/opt.h" +#include "internal.h" +#include "drawutils.h" +#include "framesync.h" + +#include "libavcodec/avcodec.h" + +enum var_name { + VAR_MAIN_W, VAR_MW, + VAR_MAIN_H, VAR_MH, + VAR_OVERLAY_W, VAR_OW, + VAR_OVERLAY_H, VAR_OH, + VAR_HSUB, + VAR_VSUB, + VAR_X, + VAR_Y, + VAR_N, + VAR_POS, + VAR_T, + VAR_VARS_NB +}; + +typedef struct OverlaySubsContext { + const AVClass *class; + int x, y; ///< position of overlaid picture + int w, h; + AVFrame *outpicref; + + int main_is_packed_rgb; + uint8_t main_rgba_map[4]; + int main_has_alpha; + uint8_t overlay_rgba_map[4]; + int eval_mode; ///< EvalMode + + FFFrameSync fs; + + int main_pix_step[4]; ///< steps per pixel for each plane of the main output + int hsub, vsub; ///< chroma subsampling values + const AVPixFmtDescriptor *main_desc; ///< format descriptor for main input + + double var_values[VAR_VARS_NB]; + char *x_expr, *y_expr; + + AVExpr *x_pexpr, *y_pexpr; +} OverlaySubsContext; + +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 + "pos", ///< position in the file + "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 overlay_graphicsubs_uninit(AVFilterContext *ctx) +{ + OverlaySubsContext *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) +{ + OverlaySubsContext *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 overlay_graphicsubs_query_formats(AVFilterContext *ctx) +{ + AVFilterFormats *formats; + AVFilterLink *inlink0 = ctx->inputs[0]; + AVFilterLink *inlink1 = ctx->inputs[1]; + AVFilterLink *outlink = ctx->outputs[0]; + int ret; + static const enum AVSubtitleType subtitle_fmts[] = { AV_SUBTITLE_FMT_BITMAP, AV_SUBTITLE_FMT_NONE }; + static const enum AVPixelFormat supported_pix_fmts[] = { + AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, + 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 + }; + + /* set input0 video formats */ + formats = ff_make_format_list(supported_pix_fmts); + if ((ret = ff_formats_ref(formats, &inlink0->outcfg.formats)) < 0) + return ret; + + /* set input1 subtitle formats */ + formats = ff_make_format_list(subtitle_fmts); + if ((ret = ff_formats_ref(formats, &inlink1->outcfg.formats)) < 0) + return ret; + + /* set output0 video formats */ + formats = ff_make_format_list(supported_pix_fmts); + if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0) + return ret; + + return 0; +} + +static int config_output(AVFilterLink *outlink) +{ + AVFilterContext *ctx = outlink->src; + OverlaySubsContext *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 non-pre-multiplied 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) +#define UNPREMULTIPLY_ALPHA(x, y) ((((x) << 16) - ((x) << 9) + (x)) / ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x))) + +/** + * Blend image in src to destination buffer dst at position (x, y). + */ +static av_always_inline void blend_packed_rgb(const AVFilterContext *ctx, + const AVFrame *dst, const AVSubtitleRect *src, + int x, int y, + int is_straight) +{ + OverlaySubsContext *s = ctx->priv; + int i, imax, j, jmax; + const int src_w = src->w; + const int src_h = src->h; + 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]; + uint32_t *pal = (uint32_t *)src->data[1]; + 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; + slice_end = i + imax; + + sp = src->data[0] + slice_start * src->linesize[0]; + dp = dst->data[0] + (slice_start + y) * dst->linesize[0]; + + for (i = slice_start; i < slice_end; i++) { + j = FFMAX(-x, 0); + S = sp + j; + d = dp + ((x + j) * dstep); + + for (jmax = FFMIN(-x + dst_w, src_w); j < jmax; j++) { + uint32_t val = pal[*S]; + const uint8_t *sval = (uint8_t *)&val; + alpha = sval[sa]; + + // if the main channel has an alpha channel, alpha has to be calculated + // to create an un-premultiplied (straight) alpha value + if (s->main_has_alpha && alpha != 0 && alpha != 255) { + const uint8_t alpha_d = d[da]; + alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d); + } + + switch (alpha) { + case 0: + break; + case 255: + d[dr] = sval[sr]; + d[dg] = sval[sg]; + d[db] = sval[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] = is_straight ? FAST_DIV255(d[dr] * (255 - alpha) + sval[sr] * alpha) : + FFMIN(FAST_DIV255(d[dr] * (255 - alpha)) + sval[sr], 255); + d[dg] = is_straight ? FAST_DIV255(d[dg] * (255 - alpha) + sval[sg] * alpha) : + FFMIN(FAST_DIV255(d[dg] * (255 - alpha)) + sval[sg], 255); + d[db] = is_straight ? FAST_DIV255(d[db] * (255 - alpha) + sval[sb] * alpha) : + FFMIN(FAST_DIV255(d[db] * (255 - alpha)) + sval[sb], 255); + } + + if (s->main_has_alpha) { + switch (alpha) { + case 0: + break; + case 255: + d[da] = sval[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 += 1; + } + dp += dst->linesize[0]; + sp += src->linesize[0]; + } +} + +static av_always_inline void blend_plane_8_8bits(const AVFilterContext *ctx, const AVFrame *dst, const AVSubtitleRect *src, + const uint32_t *yuv_pal, int src_w, int src_h, int dst_w, int dst_h, int plane, int hsub, int vsub, + int x, int y, int dst_plane, int dst_offset, int dst_step) +{ + const int src_wp = AV_CEIL_RSHIFT(src_w, hsub); + const int src_hp = AV_CEIL_RSHIFT(src_h, vsub); + const int dst_wp = AV_CEIL_RSHIFT(dst_w, hsub); + const int dst_hp = AV_CEIL_RSHIFT(dst_h, vsub); + const int yp = y >> vsub; + const int xp = x >> hsub; + uint8_t *s, *sp, *d, *dp, *dap; + int imax, i, j, jmax; + int slice_start, slice_end; + + i = FFMAX(-yp, 0); \ + imax = FFMIN3(-yp + dst_hp, FFMIN(src_hp, dst_hp), yp + src_hp); \ + + slice_start = i; + slice_end = i + imax; + + sp = src->data[0] + (slice_start << vsub) * src->linesize[0]; + dp = dst->data[dst_plane] + (yp + slice_start) * dst->linesize[dst_plane] + dst_offset; + + dap = dst->data[3] + ((yp + slice_start) << vsub) * dst->linesize[3]; + + for (i = slice_start; i < slice_end; i++) { + j = FFMAX(-xp, 0); + d = dp + (xp + j) * dst_step; + s = sp + (j << hsub); + jmax = FFMIN(-xp + dst_wp, src_wp); + + for (; j < jmax; j++) { + uint32_t val = yuv_pal[*s]; + const uint8_t *sval = (uint8_t *)&val; + const int alpha = sval[3]; + const int max = 255, mid = 128; + const int d_int = *d; + const int sval_int = sval[plane]; + + switch (alpha) { + case 0: + break; + case 255: + *d = sval[plane]; + break; + default: + if (plane > 0) + *d = av_clip(FAST_DIV255((d_int - mid) * (max - alpha) + (sval_int - mid) * alpha) , -mid, mid) + mid; + else + *d = FAST_DIV255(d_int * (max - alpha) + sval_int * alpha); + break; + } + + d += dst_step; + s += 1 << hsub; + } + dp += dst->linesize[dst_plane]; + sp += (1 << vsub) * src->linesize[0]; + dap += (1 << vsub) * dst->linesize[3]; + } +} + +#define RGB2Y(r, g, b) (uint8_t)(((66 * (r) + 129 * (g) + 25 * (b) + 128) >> 8) + 16) +#define RGB2U(r, g, b) (uint8_t)(((-38 * (r) - 74 * (g) + 112 * (b) + 128) >> 8) + 128) +#define RGB2V(r, g, b) (uint8_t)(((112 * (r) - 94 * (g) - 18 * (b) + 128) >> 8) + 128) +/* Converts R8 G8 B8 color to YUV. */ +static av_always_inline void rgb_2_yuv(uint8_t r, uint8_t g, uint8_t b, uint8_t* y, uint8_t* u, uint8_t* v) +{ + *y = RGB2Y((int)r, (int)g, (int)b); + *u = RGB2U((int)r, (int)g, (int)b); + *v = RGB2V((int)r, (int)g, (int)b); +} + + +static av_always_inline void blend_yuv_8_8bits(AVFilterContext *ctx, AVFrame *dst, const AVSubtitleRect *src, int hsub, int vsub, int x, int y) +{ + OverlaySubsContext *s = ctx->priv; + const int src_w = src->w; + const int src_h = src->h; + const int dst_w = dst->width; + const int dst_h = dst->height; + 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]; + uint32_t *pal = (uint32_t *)src->data[1]; + uint32_t yuvpal[256]; + + for (int i = 0; i < 256; ++i) { + const uint8_t *rgba = (uint8_t *)&pal[i]; + uint8_t *yuva = (uint8_t *)&yuvpal[i]; + rgb_2_yuv(rgba[sr], rgba[sg], rgba[sb], &yuva[Y], &yuva[U], &yuva[V]); + yuva[3] = rgba[sa]; + } + + blend_plane_8_8bits(ctx, dst, src, yuvpal, src_w, src_h, dst_w, dst_h, Y, 0, 0, x, y, s->main_desc->comp[Y].plane, s->main_desc->comp[Y].offset, s->main_desc->comp[Y].step); + blend_plane_8_8bits(ctx, dst, src, yuvpal, src_w, src_h, dst_w, dst_h, U, hsub, vsub, x, y, s->main_desc->comp[U].plane, s->main_desc->comp[U].offset, s->main_desc->comp[U].step); + blend_plane_8_8bits(ctx, dst, src, yuvpal, src_w, src_h, dst_w, dst_h, V, hsub, vsub, x, y, s->main_desc->comp[V].plane, s->main_desc->comp[V].offset, s->main_desc->comp[V].step); +} + +static int config_input_main(AVFilterLink *inlink) +{ + int ret; + AVFilterContext *ctx = inlink->dst; + OverlaySubsContext *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); + ff_fill_rgba_map(s->overlay_rgba_map, AV_PIX_FMT_RGB32); // it's actually AV_PIX_FMT_PAL8); + + 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 = !(pix_desc->flags & AV_PIX_FMT_FLAG_ALPHA); + + /* 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<<pix_desc->log2_chroma_w; + s->var_values[VAR_VSUB] = 1<<pix_desc->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; + s->var_values[VAR_POS] = 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; + + 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 do_blend(FFFrameSync *fs) +{ + AVFilterContext *ctx = fs->parent; + AVFrame *mainpic, *second; + OverlaySubsContext *s = ctx->priv; + AVFilterLink *inlink = ctx->inputs[0]; + unsigned num_rects, i; + 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) { + int64_t pos = mainpic->pkt_pos; + + s->var_values[VAR_N] = inlink->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_POS] = pos == -1 ? NAN : pos; + + 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 pos:%f x:%f xi:%d y:%f yi:%d\n", + s->var_values[VAR_N], s->var_values[VAR_T], s->var_values[VAR_POS], + s->var_values[VAR_X], s->x, + s->var_values[VAR_Y], s->y); + } + + num_rects = second->num_subtitle_rects > 1 ? 1 : second->num_subtitle_rects; + + for (i = 0; i < num_rects; i++) { + const AVSubtitleRect *sub_rect = second->subtitle_rects[i]; + + if (sub_rect->type != AV_SUBTITLE_FMT_BITMAP) { + av_log(NULL, AV_LOG_WARNING, "sub2video: non-bitmap subtitle\n"); + return AVERROR_INVALIDDATA; + } + + switch (inlink->format) { + case AV_PIX_FMT_YUV420P: + blend_yuv_8_8bits(ctx, mainpic, sub_rect, 1, 1, sub_rect->x + s->x, sub_rect->y + s->y); + break; + case AV_PIX_FMT_YUV422P: + blend_yuv_8_8bits(ctx, mainpic, sub_rect, 1, 0, sub_rect->x + s->x, sub_rect->y + s->y); + break; + case AV_PIX_FMT_YUV444P: + blend_yuv_8_8bits(ctx, mainpic, sub_rect, 0, 0, sub_rect->x + s->x, sub_rect->y + s->y); + break; + case AV_PIX_FMT_RGB24: + case AV_PIX_FMT_BGR24: + case AV_PIX_FMT_ARGB: + case AV_PIX_FMT_RGBA: + case AV_PIX_FMT_BGRA: + case AV_PIX_FMT_ABGR: + blend_packed_rgb(ctx, mainpic, sub_rect, sub_rect->x + s->x, sub_rect->y + s->y, 1); + break; + default: + av_assert0(0); + break; + } + } + + return ff_filter_frame(ctx->outputs[0], mainpic); +} + +static av_cold int overlay_graphicsubs_init(AVFilterContext *ctx) +{ + OverlaySubsContext *s = ctx->priv; + + s->fs.on_event = do_blend; + return 0; +} + +static int overlay_graphicsubs_activate(AVFilterContext *ctx) +{ + OverlaySubsContext *s = ctx->priv; + return ff_framesync_activate(&s->fs); +} + +static int graphicsub2video_query_formats(AVFilterContext *ctx) +{ + AVFilterFormats *formats; + AVFilterLink *inlink = ctx->inputs[0]; + AVFilterLink *outlink = ctx->outputs[0]; + static const enum AVSubtitleType subtitle_fmts[] = { AV_SUBTITLE_FMT_BITMAP, AV_SUBTITLE_FMT_NONE }; + static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE }; + int ret; + + /* set input subtitle formats */ + formats = ff_make_format_list(subtitle_fmts); + if ((ret = ff_formats_ref(formats, &inlink->outcfg.formats)) < 0) + return ret; + + /* set output video formats */ + formats = ff_make_format_list(pix_fmts); + if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0) + return ret; + + return 0; +} + +static int graphicsub2video_config_input(AVFilterLink *inlink) +{ + AVFilterContext *ctx = inlink->dst; + OverlaySubsContext *s = ctx->priv; + + if (s->w <= 0 || s->h <= 0) { + s->w = inlink->w; + s->h = inlink->h; + } + return 0; +} + +static int graphicsub2video_config_output(AVFilterLink *outlink) +{ + const AVFilterContext *ctx = outlink->src; + OverlaySubsContext *s = ctx->priv; + const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(outlink->format); + + outlink->w = s->w; + outlink->h = s->h; + outlink->sample_aspect_ratio = (AVRational){1,1}; + + av_image_fill_max_pixsteps(s->main_pix_step, NULL, pix_desc); + ff_fill_rgba_map(s->overlay_rgba_map, AV_PIX_FMT_RGB32); + + 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, outlink->format) >= 0; + s->main_has_alpha = !(pix_desc->flags & AV_PIX_FMT_FLAG_ALPHA); + + return 0; +} + +static int graphicsub2video_filter_frame(AVFilterLink *inlink, AVFrame *src_frame) +{ + AVFilterLink *outlink = inlink->dst->outputs[0]; + AVFrame *out; + const unsigned num_rects = src_frame->num_subtitle_rects; + unsigned int i; + + out = ff_get_video_buffer(outlink, outlink->w, outlink->h); + if (!out) + return AVERROR(ENOMEM); + + memset(out->data[0], 0, out->linesize[0] * out->height); + + out->pts = src_frame->pts; + + + for (i = 0; i < num_rects; i++) { + const AVSubtitleRect *sub_rect = src_frame->subtitle_rects[i]; + + if (sub_rect->type != AV_SUBTITLE_FMT_BITMAP) { + av_log(NULL, AV_LOG_WARNING, "sub2video: non-bitmap subtitle\n"); + return AVERROR_INVALIDDATA; + } + + blend_packed_rgb(inlink->dst, out, sub_rect, sub_rect->x, sub_rect->y, 1); + } + + av_frame_free(&src_frame); + return ff_filter_frame(outlink, out); +} + +#define OFFSET(x) offsetof(OverlaySubsContext, x) +#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM) + +static const AVOption overlay_graphicsubs_options[] = { + { "x", "set the x expression", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "0"}, 0, 0, FLAGS }, + { "y", "set the y expression", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "0"}, 0, 0, FLAGS }, + { "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, "eof_action" }, + { "repeat", "Repeat the previous frame.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_REPEAT }, .flags = FLAGS, "eof_action" }, + { "endall", "End both streams.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_ENDALL }, .flags = FLAGS, "eof_action" }, + { "pass", "Pass through the main input.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_PASS }, .flags = FLAGS, "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, "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 }, + { "repeatlast", "repeat overlay of the last overlay frame", OFFSET(fs.opt_repeatlast), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS }, + { NULL } +}; + +static const AVOption graphicsub2video_options[] = { + { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, FLAGS }, + { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, FLAGS }, + { NULL } +}; + +FRAMESYNC_DEFINE_CLASS(overlay_graphicsubs, OverlaySubsContext, fs); + +static const AVFilterPad overlay_graphicsubs_inputs[] = { + { + .name = "main", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_input_main, + .flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE, + }, + { + .name = "overlay", + .type = AVMEDIA_TYPE_SUBTITLE, + }, +}; + +static const AVFilterPad overlay_graphicsubs_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_output, + }, +}; + +const AVFilter ff_vf_overlay_graphicsubs = { + .name = "overlay_graphicsubs", + .description = NULL_IF_CONFIG_SMALL("Overlay graphical subtitles on top of the input."), + .preinit = overlay_graphicsubs_framesync_preinit, + .init = overlay_graphicsubs_init, + .uninit = overlay_graphicsubs_uninit, + .priv_size = sizeof(OverlaySubsContext), + .priv_class = &overlay_graphicsubs_class, + .query_formats = overlay_graphicsubs_query_formats, + .activate = overlay_graphicsubs_activate, + FILTER_INPUTS(overlay_graphicsubs_inputs), + FILTER_OUTPUTS(overlay_graphicsubs_outputs), +}; + +AVFILTER_DEFINE_CLASS(graphicsub2video); + +static const AVFilterPad graphicsub2video_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_SUBTITLE, + .filter_frame = graphicsub2video_filter_frame, + .config_props = graphicsub2video_config_input, + }, +}; + +static const AVFilterPad graphicsub2video_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = graphicsub2video_config_output, + }, +}; + +AVFilter ff_svf_graphicsub2video = { + .name = "graphicsub2video", + .description = NULL_IF_CONFIG_SMALL("Convert graphical subtitles to video"), + .query_formats = graphicsub2video_query_formats, + .priv_size = sizeof(OverlaySubsContext), + .priv_class = &graphicsub2video_class, + FILTER_INPUTS(graphicsub2video_inputs), + FILTER_OUTPUTS(graphicsub2video_outputs), +};
Signed-off-by: softworkz <softworkz@hotmail.com> --- doc/filters.texi | 104 ++++ libavfilter/Makefile | 2 + libavfilter/allfilters.c | 2 + libavfilter/vf_overlay_graphicsubs.c | 731 +++++++++++++++++++++++++++ 4 files changed, 839 insertions(+) create mode 100644 libavfilter/vf_overlay_graphicsubs.c