X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavfilter%2Fvf_drawtext.c;h=5668c8e8e0b23e867a0b99f5ca70ea830b38c4b7;hb=fd9212f2edfe9b107c3c08ba2df5fd2cba5ab9e3;hp=87c8d8f8ac63e5e591368211fa8e93d4370be3ab;hpb=f5edfc9e92d1340cd50385081e563da226940e4e;p=ffmpeg diff --git a/libavfilter/vf_drawtext.c b/libavfilter/vf_drawtext.c index 87c8d8f8ac6..5668c8e8e0b 100644 --- a/libavfilter/vf_drawtext.c +++ b/libavfilter/vf_drawtext.c @@ -26,10 +26,20 @@ * filter by Gustavo Sverzut Barbieri */ +#include "config.h" + +#include #include +#include #include +#include + +#if CONFIG_LIBFONTCONFIG +#include +#endif #include "libavutil/colorspace.h" +#include "libavutil/common.h" #include "libavutil/file.h" #include "libavutil/eval.h" #include "libavutil/opt.h" @@ -37,19 +47,20 @@ #include "libavutil/random_seed.h" #include "libavutil/parseutils.h" #include "libavutil/pixdesc.h" +#include "libavutil/time_internal.h" #include "libavutil/tree.h" #include "libavutil/lfg.h" #include "avfilter.h" #include "drawutils.h" - -#undef time +#include "formats.h" +#include "internal.h" +#include "video.h" #include -#include #include FT_FREETYPE_H #include FT_GLYPH_H -static const char *var_names[] = { +static const char *const var_names[] = { "E", "PHI", "PI", @@ -64,13 +75,13 @@ static const char *var_names[] = { NULL }; -static const char *fun2_names[] = { - "rand", +static const char *const fun2_names[] = { + "rand" }; static double drand(void *opaque, double min, double max) { - return val = min + (max-min) / UINT_MAX * av_lfg_get(opaque); + return min + (max-min) / UINT_MAX * av_lfg_get(opaque); } typedef double (*eval_func2)(void *, double a, double b); @@ -95,8 +106,11 @@ enum var_name { VAR_VARS_NB }; -typedef struct { +typedef struct DrawTextContext { const AVClass *class; +#if CONFIG_LIBFONTCONFIG + uint8_t *font; ///< font to be used +#endif uint8_t *fontfile; ///< font to be used uint8_t *text; ///< text to be drawn uint8_t *expanded_text; ///< used to contain the strftime()-expanded text @@ -122,6 +136,7 @@ typedef struct { short int draw_box; ///< draw box around text - true or false int use_kerning; ///< font kerning is used - true/false int tabsize; ///< tab size + int fix_bounds; ///< do we let it go out of frame bounds - t/f FT_Library library; ///< freetype font library handle FT_Face face; ///< freetype font face handle @@ -137,45 +152,55 @@ typedef struct { char *d_expr; AVExpr *d_pexpr; int draw; ///< set to zero to prevent drawing + char *a_expr; + AVExpr *a_pexpr; + int alpha; AVLFG prng; ///< random } DrawTextContext; #define OFFSET(x) offsetof(DrawTextContext, x) +#define FLAGS AV_OPT_FLAG_VIDEO_PARAM static const AVOption drawtext_options[]= { -{"fontfile", "set font file", OFFSET(fontfile), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX }, -{"text", "set text", OFFSET(text), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX }, -{"textfile", "set text file", OFFSET(textfile), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX }, -{"fontcolor","set foreground color", OFFSET(fontcolor_string), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX }, -{"boxcolor", "set box color", OFFSET(boxcolor_string), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX }, -{"shadowcolor", "set shadow color", OFFSET(shadowcolor_string), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX }, -{"box", "set box", OFFSET(draw_box), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1 }, -{"fontsize", "set font size", OFFSET(fontsize), AV_OPT_TYPE_INT, {.dbl=16}, 1, 72 }, -{"x", "set x", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str="0"}, CHAR_MIN, CHAR_MAX }, -{"y", "set y", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str="0"}, CHAR_MIN, CHAR_MAX }, -{"shadowx", "set x", OFFSET(shadowx), AV_OPT_TYPE_INT, {.dbl=0}, INT_MIN, INT_MAX }, -{"shadowy", "set y", OFFSET(shadowy), AV_OPT_TYPE_INT, {.dbl=0}, INT_MIN, INT_MAX }, -{"tabsize", "set tab size", OFFSET(tabsize), AV_OPT_TYPE_INT, {.dbl=4}, 0, INT_MAX }, -{"draw", "if false do not draw", OFFSET(d_expr), AV_OPT_TYPE_STRING, {.str="1"}, CHAR_MIN, CHAR_MAX }, - -/* FT_LOAD_* flags */ -{"ft_load_flags", "set font loading flags for libfreetype", OFFSET(ft_load_flags), AV_OPT_TYPE_FLAGS, {.dbl=FT_LOAD_DEFAULT|FT_LOAD_RENDER}, 0, INT_MAX, 0, "ft_load_flags" }, -{"default", "set default", 0, AV_OPT_TYPE_CONST, {FT_LOAD_DEFAULT}, INT_MIN, INT_MAX, 0, "ft_load_flags" }, -{"no_scale", "set no_scale", 0, AV_OPT_TYPE_CONST, {FT_LOAD_NO_SCALE}, INT_MIN, INT_MAX, 0, "ft_load_flags" }, -{"no_hinting", "set no_hinting", 0, AV_OPT_TYPE_CONST, {FT_LOAD_NO_HINTING}, INT_MIN, INT_MAX, 0, "ft_load_flags" }, -{"render", "set render", 0, AV_OPT_TYPE_CONST, {FT_LOAD_RENDER}, INT_MIN, INT_MAX, 0, "ft_load_flags" }, -{"no_bitmap", "set no_bitmap", 0, AV_OPT_TYPE_CONST, {FT_LOAD_NO_BITMAP}, INT_MIN, INT_MAX, 0, "ft_load_flags" }, -{"vertical_layout", "set vertical_layout", 0, AV_OPT_TYPE_CONST, {FT_LOAD_VERTICAL_LAYOUT}, INT_MIN, INT_MAX, 0, "ft_load_flags" }, -{"force_autohint", "set force_autohint", 0, AV_OPT_TYPE_CONST, {FT_LOAD_FORCE_AUTOHINT}, INT_MIN, INT_MAX, 0, "ft_load_flags" }, -{"crop_bitmap", "set crop_bitmap", 0, AV_OPT_TYPE_CONST, {FT_LOAD_CROP_BITMAP}, INT_MIN, INT_MAX, 0, "ft_load_flags" }, -{"pedantic", "set pedantic", 0, AV_OPT_TYPE_CONST, {FT_LOAD_PEDANTIC}, INT_MIN, INT_MAX, 0, "ft_load_flags" }, -{"ignore_global_advance_width", "set ignore_global_advance_width", 0, AV_OPT_TYPE_CONST, {FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH}, INT_MIN, INT_MAX, 0, "ft_load_flags" }, -{"no_recurse", "set no_recurse", 0, AV_OPT_TYPE_CONST, {FT_LOAD_NO_RECURSE}, INT_MIN, INT_MAX, 0, "ft_load_flags" }, -{"ignore_transform", "set ignore_transform", 0, AV_OPT_TYPE_CONST, {FT_LOAD_IGNORE_TRANSFORM}, INT_MIN, INT_MAX, 0, "ft_load_flags" }, -{"monochrome", "set monochrome", 0, AV_OPT_TYPE_CONST, {FT_LOAD_MONOCHROME}, INT_MIN, INT_MAX, 0, "ft_load_flags" }, -{"linear_design", "set linear_design", 0, AV_OPT_TYPE_CONST, {FT_LOAD_LINEAR_DESIGN}, INT_MIN, INT_MAX, 0, "ft_load_flags" }, -{"no_autohint", "set no_autohint", 0, AV_OPT_TYPE_CONST, {FT_LOAD_NO_AUTOHINT}, INT_MIN, INT_MAX, 0, "ft_load_flags" }, -{NULL}, +#if CONFIG_LIBFONTCONFIG + { "font", "Font name", OFFSET(font), AV_OPT_TYPE_STRING, { .str = "Sans" }, .flags = FLAGS }, +#endif + { "fontfile", NULL, OFFSET(fontfile), AV_OPT_TYPE_STRING, .flags = FLAGS }, + { "text", NULL, OFFSET(text), AV_OPT_TYPE_STRING, .flags = FLAGS }, + { "textfile", NULL, OFFSET(textfile), AV_OPT_TYPE_STRING, .flags = FLAGS }, + { "fontcolor", NULL, OFFSET(fontcolor_string), AV_OPT_TYPE_STRING, { .str = "black" }, .flags = FLAGS }, + { "boxcolor", NULL, OFFSET(boxcolor_string), AV_OPT_TYPE_STRING, { .str = "white" }, .flags = FLAGS }, + { "shadowcolor", NULL, OFFSET(shadowcolor_string), AV_OPT_TYPE_STRING, { .str = "black" }, .flags = FLAGS }, + { "box", NULL, OFFSET(draw_box), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS }, + { "fontsize", NULL, OFFSET(fontsize), AV_OPT_TYPE_INT, { .i64 = 16 }, 1, 1024, FLAGS }, + { "x", NULL, OFFSET(x_expr), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS }, + { "y", NULL, OFFSET(y_expr), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS }, + { "shadowx", NULL, OFFSET(shadowx), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS }, + { "shadowy", NULL, OFFSET(shadowy), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS }, + { "tabsize", NULL, OFFSET(tabsize), AV_OPT_TYPE_INT, { .i64 = 4 }, 0, INT_MAX, FLAGS }, + { "draw", "if false do not draw", OFFSET(d_expr), AV_OPT_TYPE_STRING, { .str = "1" }, .flags = FLAGS }, + { "alpha", "apply alpha while rendering", OFFSET(a_expr), AV_OPT_TYPE_STRING, { .str = "1" }, .flags = FLAGS }, + { "fix_bounds", "if true, check and fix text coords to avoid clipping", + OFFSET(fix_bounds), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, FLAGS }, + + /* FT_LOAD_* flags */ + { "ft_load_flags", "set font loading flags for libfreetype", OFFSET(ft_load_flags), AV_OPT_TYPE_FLAGS, { .i64 = FT_LOAD_DEFAULT | FT_LOAD_RENDER}, 0, INT_MAX, FLAGS, "ft_load_flags" }, + { "default", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_DEFAULT }, .flags = FLAGS, .unit = "ft_load_flags" }, + { "no_scale", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_NO_SCALE }, .flags = FLAGS, .unit = "ft_load_flags" }, + { "no_hinting", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_NO_HINTING }, .flags = FLAGS, .unit = "ft_load_flags" }, + { "render", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_RENDER }, .flags = FLAGS, .unit = "ft_load_flags" }, + { "no_bitmap", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_NO_BITMAP }, .flags = FLAGS, .unit = "ft_load_flags" }, + { "vertical_layout", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_VERTICAL_LAYOUT }, .flags = FLAGS, .unit = "ft_load_flags" }, + { "force_autohint", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_FORCE_AUTOHINT }, .flags = FLAGS, .unit = "ft_load_flags" }, + { "crop_bitmap", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_CROP_BITMAP }, .flags = FLAGS, .unit = "ft_load_flags" }, + { "pedantic", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_PEDANTIC }, .flags = FLAGS, .unit = "ft_load_flags" }, + { "ignore_global_advance_width", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH }, .flags = FLAGS, .unit = "ft_load_flags" }, + { "no_recurse", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_NO_RECURSE }, .flags = FLAGS, .unit = "ft_load_flags" }, + { "ignore_transform", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_IGNORE_TRANSFORM }, .flags = FLAGS, .unit = "ft_load_flags" }, + { "monochrome", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_MONOCHROME }, .flags = FLAGS, .unit = "ft_load_flags" }, + { "linear_design", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_LINEAR_DESIGN }, .flags = FLAGS, .unit = "ft_load_flags" }, + { "no_autohint", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_NO_AUTOHINT }, .flags = FLAGS, .unit = "ft_load_flags" }, + { NULL}, }; static const char *drawtext_get_name(void *ctx) @@ -194,16 +219,15 @@ static const AVClass drawtext_class = { #define FT_ERRORDEF(e, v, s) { (e), (s) }, #define FT_ERROR_END_LIST { 0, NULL } }; -struct ft_error -{ +static const struct ft_error { int err; const char *err_msg; -} static ft_errors[] = +} ft_errors[] = #include FT_ERRORS_H #define FT_ERRMSG(e) ft_errors[e].err_msg -typedef struct { +typedef struct Glyph { FT_Glyph *glyph; uint32_t code; FT_Bitmap bitmap; ///< array holding bitmaps of font @@ -225,13 +249,13 @@ static int glyph_cmp(void *key, const void *b) */ static int load_glyph(AVFilterContext *ctx, Glyph **glyph_ptr, uint32_t code) { - DrawTextContext *dtext = ctx->priv; + DrawTextContext *s = ctx->priv; Glyph *glyph; struct AVTreeNode *node = NULL; int ret; - /* load glyph into dtext->face->glyph */ - if (FT_Load_Char(dtext->face, code, dtext->ft_load_flags)) + /* load glyph into s->face->glyph */ + if (FT_Load_Char(s->face, code, s->ft_load_flags)) return AVERROR(EINVAL); /* save glyph */ @@ -242,25 +266,25 @@ static int load_glyph(AVFilterContext *ctx, Glyph **glyph_ptr, uint32_t code) } glyph->code = code; - if (FT_Get_Glyph(dtext->face->glyph, glyph->glyph)) { + if (FT_Get_Glyph(s->face->glyph, glyph->glyph)) { ret = AVERROR(EINVAL); goto error; } - glyph->bitmap = dtext->face->glyph->bitmap; - glyph->bitmap_left = dtext->face->glyph->bitmap_left; - glyph->bitmap_top = dtext->face->glyph->bitmap_top; - glyph->advance = dtext->face->glyph->advance.x >> 6; + glyph->bitmap = s->face->glyph->bitmap; + glyph->bitmap_left = s->face->glyph->bitmap_left; + glyph->bitmap_top = s->face->glyph->bitmap_top; + glyph->advance = s->face->glyph->advance.x >> 6; /* measure text height to calculate text_height (or the maximum text height) */ FT_Glyph_Get_CBox(*glyph->glyph, ft_glyph_bbox_pixels, &glyph->bbox); /* cache the newly created glyph */ - if (!(node = av_mallocz(av_tree_node_size))) { + if (!(node = av_tree_node_alloc())) { ret = AVERROR(ENOMEM); goto error; } - av_tree_insert(&dtext->glyphs, glyph, glyph_cmp, &node); + av_tree_insert(&s->glyphs, glyph, glyph_cmp, &node); if (glyph_ptr) *glyph_ptr = glyph; @@ -274,94 +298,163 @@ error: return ret; } -static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) +static int parse_font(AVFilterContext *ctx) { - int err; - DrawTextContext *dtext = ctx->priv; - Glyph *glyph; + DrawTextContext *s = ctx->priv; +#if !CONFIG_LIBFONTCONFIG + if (!s->fontfile) { + av_log(ctx, AV_LOG_ERROR, "No font filename provided\n"); + return AVERROR(EINVAL); + } - dtext->class = &drawtext_class; - av_opt_set_defaults(dtext); - dtext->fontcolor_string = av_strdup("black"); - dtext->boxcolor_string = av_strdup("white"); - dtext->shadowcolor_string = av_strdup("black"); + return 0; +#else + FcPattern *pat, *best; + FcResult result = FcResultMatch; - if ((err = (av_set_options_string(dtext, args, "=", ":"))) < 0) { - av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args); - return err; + FcBool fc_bool; + FcChar8* fc_string; + int err = AVERROR(ENOENT); + + if (s->fontfile) + return 0; + + if (!FcInit()) + return AVERROR_UNKNOWN; + + if (!(pat = FcPatternCreate())) + return AVERROR(ENOMEM); + + FcPatternAddString(pat, FC_FAMILY, s->font); + FcPatternAddBool(pat, FC_OUTLINE, FcTrue); + FcPatternAddDouble(pat, FC_SIZE, (double)s->fontsize); + + FcDefaultSubstitute(pat); + + if (!FcConfigSubstitute(NULL, pat, FcMatchPattern)) { + FcPatternDestroy(pat); + return AVERROR(ENOMEM); } - if (!dtext->fontfile) { - av_log(ctx, AV_LOG_ERROR, "No font filename provided\n"); - return AVERROR(EINVAL); + best = FcFontMatch(NULL, pat, &result); + FcPatternDestroy(pat); + + if (!best || result == FcResultNoMatch) { + av_log(ctx, AV_LOG_ERROR, + "Cannot find a valid font for the family %s\n", + s->font); + goto fail; + } + + if (FcPatternGetBool(best, FC_OUTLINE, 0, &fc_bool) != FcResultMatch || + !fc_bool) { + av_log(ctx, AV_LOG_ERROR, "Outline not available for %s\n", + s->font); + goto fail; + } + + if (FcPatternGetString(best, FC_FAMILY, 0, &fc_string) != FcResultMatch) { + av_log(ctx, AV_LOG_ERROR, "No matches for %s\n", + s->font); + goto fail; + } + + if (FcPatternGetString(best, FC_FILE, 0, &fc_string) != FcResultMatch) { + av_log(ctx, AV_LOG_ERROR, "No file path for %s\n", + s->font); + goto fail; } - if (dtext->textfile) { + s->fontfile = av_strdup(fc_string); + if (!s->fontfile) + err = AVERROR(ENOMEM); + else + err = 0; + +fail: + FcPatternDestroy(best); + return err; +#endif +} + +static av_cold int init(AVFilterContext *ctx) +{ + int err; + DrawTextContext *s = ctx->priv; + Glyph *glyph; + + if ((err = parse_font(ctx)) < 0) + return err; + + if (s->textfile) { uint8_t *textbuf; size_t textbuf_size; - if (dtext->text) { + if (s->text) { av_log(ctx, AV_LOG_ERROR, "Both text and text file provided. Please provide only one\n"); return AVERROR(EINVAL); } - if ((err = av_file_map(dtext->textfile, &textbuf, &textbuf_size, 0, ctx)) < 0) { + if ((err = av_file_map(s->textfile, &textbuf, &textbuf_size, 0, ctx)) < 0) { av_log(ctx, AV_LOG_ERROR, "The text file '%s' could not be read or is empty\n", - dtext->textfile); + s->textfile); return err; } - if (!(dtext->text = av_malloc(textbuf_size+1))) + if (textbuf_size > SIZE_MAX - 1 || + !(s->text = av_malloc(textbuf_size + 1))) { + av_file_unmap(textbuf, textbuf_size); return AVERROR(ENOMEM); - memcpy(dtext->text, textbuf, textbuf_size); - dtext->text[textbuf_size] = 0; + } + memcpy(s->text, textbuf, textbuf_size); + s->text[textbuf_size] = 0; av_file_unmap(textbuf, textbuf_size); } - if (!dtext->text) { + if (!s->text) { av_log(ctx, AV_LOG_ERROR, "Either text or a valid file must be provided\n"); return AVERROR(EINVAL); } - if ((err = av_parse_color(dtext->fontcolor_rgba, dtext->fontcolor_string, -1, ctx))) { + if ((err = av_parse_color(s->fontcolor_rgba, s->fontcolor_string, -1, ctx))) { av_log(ctx, AV_LOG_ERROR, - "Invalid font color '%s'\n", dtext->fontcolor_string); + "Invalid font color '%s'\n", s->fontcolor_string); return err; } - if ((err = av_parse_color(dtext->boxcolor_rgba, dtext->boxcolor_string, -1, ctx))) { + if ((err = av_parse_color(s->boxcolor_rgba, s->boxcolor_string, -1, ctx))) { av_log(ctx, AV_LOG_ERROR, - "Invalid box color '%s'\n", dtext->boxcolor_string); + "Invalid box color '%s'\n", s->boxcolor_string); return err; } - if ((err = av_parse_color(dtext->shadowcolor_rgba, dtext->shadowcolor_string, -1, ctx))) { + if ((err = av_parse_color(s->shadowcolor_rgba, s->shadowcolor_string, -1, ctx))) { av_log(ctx, AV_LOG_ERROR, - "Invalid shadow color '%s'\n", dtext->shadowcolor_string); + "Invalid shadow color '%s'\n", s->shadowcolor_string); return err; } - if ((err = FT_Init_FreeType(&(dtext->library)))) { + if ((err = FT_Init_FreeType(&(s->library)))) { av_log(ctx, AV_LOG_ERROR, "Could not load FreeType: %s\n", FT_ERRMSG(err)); return AVERROR(EINVAL); } /* load the face, and set up the encoding, which is by default UTF-8 */ - if ((err = FT_New_Face(dtext->library, dtext->fontfile, 0, &dtext->face))) { + if ((err = FT_New_Face(s->library, s->fontfile, 0, &s->face))) { av_log(ctx, AV_LOG_ERROR, "Could not load fontface from file '%s': %s\n", - dtext->fontfile, FT_ERRMSG(err)); + s->fontfile, FT_ERRMSG(err)); return AVERROR(EINVAL); } - if ((err = FT_Set_Pixel_Sizes(dtext->face, 0, dtext->fontsize))) { + if ((err = FT_Set_Pixel_Sizes(s->face, 0, s->fontsize))) { av_log(ctx, AV_LOG_ERROR, "Could not set font size to %d pixels: %s\n", - dtext->fontsize, FT_ERRMSG(err)); + s->fontsize, FT_ERRMSG(err)); return AVERROR(EINVAL); } - dtext->use_kerning = FT_HAS_KERNING(dtext->face); + s->use_kerning = FT_HAS_KERNING(s->face); /* load the fallback glyph with code 0 */ load_glyph(ctx, NULL, 0); @@ -371,28 +464,24 @@ static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) av_log(ctx, AV_LOG_ERROR, "Could not set tabsize.\n"); return err; } - dtext->tabsize *= glyph->advance; - -#if !HAVE_LOCALTIME_R - av_log(ctx, AV_LOG_WARNING, "strftime() expansion unavailable!\n"); -#endif + s->tabsize *= glyph->advance; return 0; } static int query_formats(AVFilterContext *ctx) { - static const enum PixelFormat pix_fmts[] = { - PIX_FMT_ARGB, PIX_FMT_RGBA, - PIX_FMT_ABGR, PIX_FMT_BGRA, - PIX_FMT_RGB24, PIX_FMT_BGR24, - PIX_FMT_YUV420P, PIX_FMT_YUV444P, - PIX_FMT_YUV422P, PIX_FMT_YUV411P, - PIX_FMT_YUV410P, PIX_FMT_YUV440P, - PIX_FMT_NONE + static const enum AVPixelFormat pix_fmts[] = { + 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_YUV420P, AV_PIX_FMT_YUV444P, + AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV411P, + AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P, + AV_PIX_FMT_NONE }; - avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts)); + ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); return 0; } @@ -404,84 +493,92 @@ static int glyph_enu_free(void *opaque, void *elem) static av_cold void uninit(AVFilterContext *ctx) { - DrawTextContext *dtext = ctx->priv; + DrawTextContext *s = ctx->priv; int i; - av_freep(&dtext->fontfile); - av_freep(&dtext->text); - av_freep(&dtext->expanded_text); - av_freep(&dtext->fontcolor_string); - av_freep(&dtext->boxcolor_string); - av_freep(&dtext->positions); - av_freep(&dtext->shadowcolor_string); - av_tree_enumerate(dtext->glyphs, NULL, NULL, glyph_enu_free); - av_tree_destroy(dtext->glyphs); - dtext->glyphs = 0; - FT_Done_Face(dtext->face); - FT_Done_FreeType(dtext->library); + av_expr_free(s->x_pexpr); + av_expr_free(s->y_pexpr); + av_expr_free(s->d_pexpr); + s->x_pexpr = s->y_pexpr = s->d_pexpr = NULL; + av_freep(&s->expanded_text); + av_freep(&s->positions); + av_tree_enumerate(s->glyphs, NULL, NULL, glyph_enu_free); + av_tree_destroy(s->glyphs); + s->glyphs = 0; + FT_Done_Face(s->face); + FT_Done_FreeType(s->library); for (i = 0; i < 4; i++) { - av_freep(&dtext->box_line[i]); - dtext->pixel_step[i] = 0; + av_freep(&s->box_line[i]); + s->pixel_step[i] = 0; } } static inline int is_newline(uint32_t c) { - return (c == '\n' || c == '\r' || c == '\f' || c == '\v'); + return c == '\n' || c == '\r' || c == '\f' || c == '\v'; } -static int dtext_prepare_text(AVFilterContext *ctx) +static int expand_strftime(DrawTextContext *s) { - DrawTextContext *dtext = ctx->priv; - uint32_t code = 0, prev_code = 0; - int x = 0, y = 0, i = 0, ret; - int text_height, baseline; - char *text = dtext->text; - uint8_t *p; - int str_w = 0, len; - int y_min = 32000, y_max = -32000; - FT_Vector delta; - Glyph *glyph = NULL, *prev_glyph = NULL; - Glyph dummy = { 0 }; - int width = ctx->inputs[0]->w; - int height = ctx->inputs[0]->h; - -#if HAVE_LOCALTIME_R - time_t now = time(0); struct tm ltime; - uint8_t *buf = dtext->expanded_text; - int buf_size = dtext->expanded_text_size; + time_t now = time(0); + uint8_t *buf = s->expanded_text; + int buf_size = s->expanded_text_size; if (!buf) - buf_size = 2*strlen(dtext->text)+1; + buf_size = 2 * strlen(s->text) + 1; localtime_r(&now, <ime); while ((buf = av_realloc(buf, buf_size))) { *buf = 1; - if (strftime(buf, buf_size, dtext->text, <ime) != 0 || *buf == 0) + if (strftime(buf, buf_size, s->text, <ime) != 0 || *buf == 0) break; buf_size *= 2; } if (!buf) return AVERROR(ENOMEM); - text = dtext->expanded_text = buf; - dtext->expanded_text_size = buf_size; -#endif + s->expanded_text = buf; + s->expanded_text_size = buf_size; + + return 0; +} + +static int dtext_prepare_text(AVFilterContext *ctx) +{ + DrawTextContext *s = ctx->priv; + uint32_t code = 0, prev_code = 0; + int x = 0, y = 0, i = 0, ret; + int text_height, baseline; + char *text; + uint8_t *p; + int str_w = 0, len; + int y_min = 32000, y_max = -32000; + FT_Vector delta; + Glyph *glyph = NULL, *prev_glyph = NULL; + Glyph dummy = { 0 }; + int width = ctx->inputs[0]->w; + int height = ctx->inputs[0]->h; + + ret = expand_strftime(s); + if (ret < 0) + return ret; + + text = s->expanded_text ? s->expanded_text : s->text; - if ((len = strlen(text)) > dtext->nb_positions) { - FT_Vector *p = av_realloc(dtext->positions, - len * sizeof(*dtext->positions)); + if ((len = strlen(text)) > s->nb_positions) { + FT_Vector *p = av_realloc(s->positions, + len * sizeof(*s->positions)); if (!p) { - av_freep(dtext->positions); - dtext->nb_positions = 0; + av_freep(s->positions); + s->nb_positions = 0; return AVERROR(ENOMEM); } else { - dtext->positions = p; - dtext->nb_positions = len; + s->positions = p; + s->nb_positions = len; } } @@ -491,10 +588,12 @@ static int dtext_prepare_text(AVFilterContext *ctx) /* get glyph */ dummy.code = code; - glyph = av_tree_find(dtext->glyphs, &dummy, glyph_cmp, NULL); - if (!glyph) + glyph = av_tree_find(s->glyphs, &dummy, glyph_cmp, NULL); + if (!glyph) { ret = load_glyph(ctx, &glyph, code); - if (ret) return ret; + if (ret) + return ret; + } y_min = FFMIN(glyph->bbox.yMin, y_min); y_max = FFMAX(glyph->bbox.yMax, y_max); @@ -513,7 +612,7 @@ static int dtext_prepare_text(AVFilterContext *ctx) prev_code = code; if (is_newline(code)) { - str_w = FFMAX(str_w, x - dtext->x); + str_w = FFMAX(str_w, x - s->x); y += text_height; x = 0; continue; @@ -522,11 +621,11 @@ static int dtext_prepare_text(AVFilterContext *ctx) /* get glyph */ prev_glyph = glyph; dummy.code = code; - glyph = av_tree_find(dtext->glyphs, &dummy, glyph_cmp, NULL); + glyph = av_tree_find(s->glyphs, &dummy, glyph_cmp, NULL); /* kerning */ - if (dtext->use_kerning && prev_glyph && glyph->code) { - FT_Get_Kerning(dtext->face, prev_glyph->code, glyph->code, + if (s->use_kerning && prev_glyph && glyph->code) { + FT_Get_Kerning(s->face, prev_glyph->code, glyph->code, ft_kerning_default, &delta); x += delta.x >> 6; } @@ -538,17 +637,19 @@ static int dtext_prepare_text(AVFilterContext *ctx) } /* save position */ - dtext->positions[i].x = x + glyph->bitmap_left; - dtext->positions[i].y = y - glyph->bitmap_top + baseline; - if (code == '\t') x = (x / dtext->tabsize + 1)*dtext->tabsize; + s->positions[i].x = x + glyph->bitmap_left; + s->positions[i].y = y - glyph->bitmap_top + baseline; + if (code == '\t') x = (x / s->tabsize + 1)*s->tabsize; else x += glyph->advance; } str_w = FFMIN(width - 1, FFMAX(str_w, x)); y = FFMIN(y + text_height, height - 1); - dtext->w = str_w; - dtext->h = y; + s->w = str_w; + s->var_values[VAR_TEXT_W] = s->var_values[VAR_TW] = s->w; + s->h = y; + s->var_values[VAR_TEXT_H] = s->var_values[VAR_TH] = s->h; return 0; } @@ -557,58 +658,63 @@ static int dtext_prepare_text(AVFilterContext *ctx) static int config_input(AVFilterLink *inlink) { AVFilterContext *ctx = inlink->dst; - DrawTextContext *dtext = ctx->priv; - const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[inlink->format]; + DrawTextContext *s = ctx->priv; + const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format); int ret; - dtext->hsub = pix_desc->log2_chroma_w; - dtext->vsub = pix_desc->log2_chroma_h; + s->hsub = pix_desc->log2_chroma_w; + s->vsub = pix_desc->log2_chroma_h; - dtext->var_values[VAR_E ] = M_E; - dtext->var_values[VAR_PHI] = M_PHI; - dtext->var_values[VAR_PI ] = M_PI; + s->var_values[VAR_E ] = M_E; + s->var_values[VAR_PHI] = M_PHI; + s->var_values[VAR_PI ] = M_PI; - dtext->var_values[VAR_MAIN_W] = - dtext->var_values[VAR_MW] = ctx->inputs[0]->w; - dtext->var_values[VAR_MAIN_H] = - dtext->var_values[VAR_MH] = ctx->inputs[0]->h; + s->var_values[VAR_MAIN_W] = + s->var_values[VAR_MW] = ctx->inputs[0]->w; + s->var_values[VAR_MAIN_H] = + s->var_values[VAR_MH] = ctx->inputs[0]->h; - dtext->var_values[VAR_X] = 0; - dtext->var_values[VAR_Y] = 0; - dtext->var_values[VAR_N] = 0; - dtext->var_values[VAR_T] = NAN; + s->var_values[VAR_X] = 0; + s->var_values[VAR_Y] = 0; + s->var_values[VAR_T] = NAN; - av_lfg_init(&dtext->prng, av_get_random_seed()); + av_lfg_init(&s->prng, av_get_random_seed()); - if ((ret = av_expr_parse(&dtext->x_pexpr, dtext->x_expr, var_names, + av_expr_free(s->x_pexpr); + av_expr_free(s->y_pexpr); + av_expr_free(s->d_pexpr); + s->x_pexpr = s->y_pexpr = s->d_pexpr = NULL; + if ((ret = av_expr_parse(&s->x_pexpr, s->x_expr, var_names, + NULL, NULL, fun2_names, fun2, 0, ctx)) < 0 || + (ret = av_expr_parse(&s->y_pexpr, s->y_expr, var_names, NULL, NULL, fun2_names, fun2, 0, ctx)) < 0 || - (ret = av_expr_parse(&dtext->y_pexpr, dtext->y_expr, var_names, + (ret = av_expr_parse(&s->d_pexpr, s->d_expr, var_names, NULL, NULL, fun2_names, fun2, 0, ctx)) < 0 || - (ret = av_expr_parse(&dtext->d_pexpr, dtext->d_expr, var_names, + (ret = av_expr_parse(&s->a_pexpr, s->a_expr, var_names, NULL, NULL, fun2_names, fun2, 0, ctx)) < 0) return AVERROR(EINVAL); if ((ret = - ff_fill_line_with_color(dtext->box_line, dtext->pixel_step, - inlink->w, dtext->boxcolor, - inlink->format, dtext->boxcolor_rgba, - &dtext->is_packed_rgb, dtext->rgba_map)) < 0) + ff_fill_line_with_color(s->box_line, s->pixel_step, + inlink->w, s->boxcolor, + inlink->format, s->boxcolor_rgba, + &s->is_packed_rgb, s->rgba_map)) < 0) return ret; - if (!dtext->is_packed_rgb) { - uint8_t *rgba = dtext->fontcolor_rgba; - dtext->fontcolor[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]); - dtext->fontcolor[1] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0); - dtext->fontcolor[2] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0); - dtext->fontcolor[3] = rgba[3]; - rgba = dtext->shadowcolor_rgba; - dtext->shadowcolor[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]); - dtext->shadowcolor[1] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0); - dtext->shadowcolor[2] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0); - dtext->shadowcolor[3] = rgba[3]; + if (!s->is_packed_rgb) { + uint8_t *rgba = s->fontcolor_rgba; + s->fontcolor[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]); + s->fontcolor[1] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0); + s->fontcolor[2] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0); + s->fontcolor[3] = rgba[3]; + rgba = s->shadowcolor_rgba; + s->shadowcolor[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]); + s->shadowcolor[1] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0); + s->shadowcolor[2] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0); + s->shadowcolor[3] = rgba[3]; } - dtext->draw = 1; + s->draw = 1; return dtext_prepare_text(ctx); } @@ -618,21 +724,22 @@ static int config_input(AVFilterLink *inlink) (bitmap->buffer[(r) * bitmap->pitch + ((c)>>3)] & (0x80 >> ((c)&7))) * 255 : \ bitmap->buffer[(r) * bitmap->pitch + (c)] -#define SET_PIXEL_YUV(picref, yuva_color, val, x, y, hsub, vsub) { \ - luma_pos = ((x) ) + ((y) ) * picref->linesize[0]; \ - alpha = yuva_color[3] * (val) * 129; \ - picref->data[0][luma_pos] = (alpha * yuva_color[0] + (255*255*129 - alpha) * picref->data[0][luma_pos] ) >> 23; \ +#define SET_PIXEL_YUV(frame, yuva_color, val, x, y, hsub, vsub) { \ + luma_pos = ((x) ) + ((y) ) * frame->linesize[0]; \ + alpha = yuva_color[3] * alpha_mul * (val) * 129 / 255; \ + frame->data[0][luma_pos] = (alpha * yuva_color[0] + (255*255*129 - alpha) * frame->data[0][luma_pos] ) >> 23; \ if (((x) & ((1<<(hsub)) - 1)) == 0 && ((y) & ((1<<(vsub)) - 1)) == 0) {\ - chroma_pos1 = ((x) >> (hsub)) + ((y) >> (vsub)) * picref->linesize[1]; \ - chroma_pos2 = ((x) >> (hsub)) + ((y) >> (vsub)) * picref->linesize[2]; \ - picref->data[1][chroma_pos1] = (alpha * yuva_color[1] + (255*255*129 - alpha) * picref->data[1][chroma_pos1]) >> 23; \ - picref->data[2][chroma_pos2] = (alpha * yuva_color[2] + (255*255*129 - alpha) * picref->data[2][chroma_pos2]) >> 23; \ + chroma_pos1 = ((x) >> (hsub)) + ((y) >> (vsub)) * frame->linesize[1]; \ + chroma_pos2 = ((x) >> (hsub)) + ((y) >> (vsub)) * frame->linesize[2]; \ + frame->data[1][chroma_pos1] = (alpha * yuva_color[1] + (255*255*129 - alpha) * frame->data[1][chroma_pos1]) >> 23; \ + frame->data[2][chroma_pos2] = (alpha * yuva_color[2] + (255*255*129 - alpha) * frame->data[2][chroma_pos2]) >> 23; \ }\ } -static inline int draw_glyph_yuv(AVFilterBufferRef *picref, FT_Bitmap *bitmap, unsigned int x, +static inline int draw_glyph_yuv(AVFrame *frame, FT_Bitmap *bitmap, unsigned int x, unsigned int y, unsigned int width, unsigned int height, - const uint8_t yuva_color[4], int hsub, int vsub) + const uint8_t yuva_color[4], int hsub, int vsub, + int alpha_mul) { int r, c, alpha; unsigned int luma_pos, chroma_pos1, chroma_pos2; @@ -645,25 +752,26 @@ static inline int draw_glyph_yuv(AVFilterBufferRef *picref, FT_Bitmap *bitmap, u if (!src_val) continue; - SET_PIXEL_YUV(picref, yuva_color, src_val, c+x, y+r, hsub, vsub); + SET_PIXEL_YUV(frame, yuva_color, src_val, c+x, y+r, hsub, vsub); } } return 0; } -#define SET_PIXEL_RGB(picref, rgba_color, val, x, y, pixel_step, r_off, g_off, b_off, a_off) { \ - p = picref->data[0] + (x) * pixel_step + ((y) * picref->linesize[0]); \ - alpha = rgba_color[3] * (val) * 129; \ +#define SET_PIXEL_RGB(frame, rgba_color, val, x, y, pixel_step, r_off, g_off, b_off, a_off) { \ + p = frame->data[0] + (x) * pixel_step + ((y) * frame->linesize[0]); \ + alpha = rgba_color[3] * alpha_mul * (val) * 129 / 255; \ *(p+r_off) = (alpha * rgba_color[0] + (255*255*129 - alpha) * *(p+r_off)) >> 23; \ *(p+g_off) = (alpha * rgba_color[1] + (255*255*129 - alpha) * *(p+g_off)) >> 23; \ *(p+b_off) = (alpha * rgba_color[2] + (255*255*129 - alpha) * *(p+b_off)) >> 23; \ } -static inline int draw_glyph_rgb(AVFilterBufferRef *picref, FT_Bitmap *bitmap, +static inline int draw_glyph_rgb(AVFrame *frame, FT_Bitmap *bitmap, unsigned int x, unsigned int y, unsigned int width, unsigned int height, int pixel_step, - const uint8_t rgba_color[4], const uint8_t rgba_map[4]) + const uint8_t rgba_color[4], const uint8_t rgba_map[4], + int alpha_mul) { int r, c, alpha; uint8_t *p; @@ -676,7 +784,7 @@ static inline int draw_glyph_rgb(AVFilterBufferRef *picref, FT_Bitmap *bitmap, if (!src_val) continue; - SET_PIXEL_RGB(picref, rgba_color, src_val, c+x, y+r, pixel_step, + SET_PIXEL_RGB(frame, rgba_color, src_val, c+x, y+r, pixel_step, rgba_map[0], rgba_map[1], rgba_map[2], rgba_map[3]); } } @@ -684,37 +792,40 @@ static inline int draw_glyph_rgb(AVFilterBufferRef *picref, FT_Bitmap *bitmap, return 0; } -static inline void drawbox(AVFilterBufferRef *picref, unsigned int x, unsigned int y, +static inline void drawbox(AVFrame *frame, unsigned int x, unsigned int y, unsigned int width, unsigned int height, uint8_t *line[4], int pixel_step[4], uint8_t color[4], - int hsub, int vsub, int is_rgba_packed, uint8_t rgba_map[4]) + int hsub, int vsub, int is_rgba_packed, uint8_t rgba_map[4], + int alpha_mul) { int i, j, alpha; - if (color[3] != 0xFF) { + if (color[3] != 0xFF || alpha_mul != 0xFF) { if (is_rgba_packed) { uint8_t *p; for (j = 0; j < height; j++) for (i = 0; i < width; i++) - SET_PIXEL_RGB(picref, color, 255, i+x, y+j, pixel_step[0], + SET_PIXEL_RGB(frame, color, 255, i+x, y+j, pixel_step[0], rgba_map[0], rgba_map[1], rgba_map[2], rgba_map[3]); } else { unsigned int luma_pos, chroma_pos1, chroma_pos2; for (j = 0; j < height; j++) for (i = 0; i < width; i++) - SET_PIXEL_YUV(picref, color, 255, i+x, y+j, hsub, vsub); + SET_PIXEL_YUV(frame, color, 255, i+x, y+j, hsub, vsub); } } else { - ff_draw_rectangle(picref->data, picref->linesize, + ff_draw_rectangle(frame->data, frame->linesize, line, pixel_step, hsub, vsub, x, y, width, height); } } -static int draw_glyphs(DrawTextContext *dtext, AVFilterBufferRef *picref, - int width, int height, const uint8_t rgbcolor[4], const uint8_t yuvcolor[4], int x, int y) +static int draw_glyphs(DrawTextContext *s, AVFrame *frame, + int width, int height, + const uint8_t rgbcolor[4], const uint8_t yuvcolor[4], + int x, int y) { - char *text = HAVE_LOCALTIME_R ? dtext->expanded_text : dtext->text; + char *text = s->expanded_text; uint32_t code = 0; int i; uint8_t *p; @@ -729,60 +840,58 @@ static int draw_glyphs(DrawTextContext *dtext, AVFilterBufferRef *picref, continue; dummy.code = code; - glyph = av_tree_find(dtext->glyphs, &dummy, (void *)glyph_cmp, NULL); + glyph = av_tree_find(s->glyphs, &dummy, glyph_cmp, NULL); if (glyph->bitmap.pixel_mode != FT_PIXEL_MODE_MONO && glyph->bitmap.pixel_mode != FT_PIXEL_MODE_GRAY) return AVERROR(EINVAL); - if (dtext->is_packed_rgb) { - draw_glyph_rgb(picref, &glyph->bitmap, - dtext->positions[i].x+x, dtext->positions[i].y+y, width, height, - dtext->pixel_step[0], rgbcolor, dtext->rgba_map); + if (s->is_packed_rgb) { + draw_glyph_rgb(frame, &glyph->bitmap, + s->positions[i].x+x, s->positions[i].y+y, width, height, + s->pixel_step[0], rgbcolor, s->rgba_map, s->alpha); } else { - draw_glyph_yuv(picref, &glyph->bitmap, - dtext->positions[i].x+x, dtext->positions[i].y+y, width, height, - yuvcolor, dtext->hsub, dtext->vsub); + draw_glyph_yuv(frame, &glyph->bitmap, + s->positions[i].x+x, s->positions[i].y+y, width, height, + yuvcolor, s->hsub, s->vsub, s->alpha); } } return 0; } -static int draw_text(AVFilterContext *ctx, AVFilterBufferRef *picref, +static int draw_text(AVFilterContext *ctx, AVFrame *frame, int width, int height) { - DrawTextContext *dtext = ctx->priv; + DrawTextContext *s = ctx->priv; int ret; /* draw box */ - if (dtext->draw_box) - drawbox(picref, dtext->x, dtext->y, dtext->w, dtext->h, - dtext->box_line, dtext->pixel_step, dtext->boxcolor, - dtext->hsub, dtext->vsub, dtext->is_packed_rgb, - dtext->rgba_map); - - if (dtext->shadowx || dtext->shadowy) { - if ((ret = draw_glyphs(dtext, picref, width, height, - dtext->shadowcolor_rgba, - dtext->shadowcolor, - dtext->x + dtext->shadowx, - dtext->y + dtext->shadowy)) < 0) + if (s->draw_box) + drawbox(frame, s->x, s->y, s->w, s->h, + s->box_line, s->pixel_step, s->boxcolor, + s->hsub, s->vsub, s->is_packed_rgb, + s->rgba_map, s->alpha); + + if (s->shadowx || s->shadowy) { + if ((ret = draw_glyphs(s, frame, width, height, + s->shadowcolor_rgba, + s->shadowcolor, + s->x + s->shadowx, + s->y + s->shadowy)) < 0) return ret; } - if ((ret = draw_glyphs(dtext, picref, width, height, - dtext->fontcolor_rgba, - dtext->fontcolor, - dtext->x, - dtext->y)) < 0) + if ((ret = draw_glyphs(s, frame, width, height, + s->fontcolor_rgba, + s->fontcolor, + s->x, + s->y)) < 0) return ret; return 0; } -static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { } - static inline int normalize_double(int *n, double d) { int ret = 0; @@ -798,84 +907,102 @@ static inline int normalize_double(int *n, double d) return ret; } -static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref) +static void update_alpha(DrawTextContext *s) +{ + double alpha = av_expr_eval(s->a_pexpr, s->var_values, &s->prng); + + if (isnan(alpha)) + return; + + if (alpha >= 1.0) + s->alpha = 255; + else if (alpha <= 0) + s->alpha = 0; + else + s->alpha = 256 * alpha; +} + +static int filter_frame(AVFilterLink *inlink, AVFrame *frame) { AVFilterContext *ctx = inlink->dst; - DrawTextContext *dtext = ctx->priv; - int fail = 0; + DrawTextContext *s = ctx->priv; + int ret = 0; - if (dtext_prepare_text(ctx) < 0) { + if ((ret = dtext_prepare_text(ctx)) < 0) { av_log(ctx, AV_LOG_ERROR, "Can't draw text\n"); - fail = 1; + av_frame_free(&frame); + return ret; } - dtext->var_values[VAR_T] = inpicref->pts == AV_NOPTS_VALUE ? - NAN : inpicref->pts * av_q2d(inlink->time_base); - dtext->var_values[VAR_X] = - av_expr_eval(dtext->x_pexpr, dtext->var_values, &dtext->prng); - dtext->var_values[VAR_Y] = - av_expr_eval(dtext->y_pexpr, dtext->var_values, &dtext->prng); - dtext->var_values[VAR_X] = - av_expr_eval(dtext->x_pexpr, dtext->var_values, &dtext->prng); - - dtext->draw = fail ? 0 : - av_expr_eval(dtext->d_pexpr, dtext->var_values, &dtext->prng); + s->var_values[VAR_T] = frame->pts == AV_NOPTS_VALUE ? + NAN : frame->pts * av_q2d(inlink->time_base); + s->var_values[VAR_X] = + av_expr_eval(s->x_pexpr, s->var_values, &s->prng); + s->var_values[VAR_Y] = + av_expr_eval(s->y_pexpr, s->var_values, &s->prng); + s->var_values[VAR_X] = + av_expr_eval(s->x_pexpr, s->var_values, &s->prng); + + s->draw = av_expr_eval(s->d_pexpr, s->var_values, &s->prng); + + update_alpha(s); + + normalize_double(&s->x, s->var_values[VAR_X]); + normalize_double(&s->y, s->var_values[VAR_Y]); + + if (s->fix_bounds) { + if (s->x < 0) s->x = 0; + if (s->y < 0) s->y = 0; + if ((unsigned)s->x + (unsigned)s->w > inlink->w) + s->x = inlink->w - s->w; + if ((unsigned)s->y + (unsigned)s->h > inlink->h) + s->y = inlink->h - s->h; + } - normalize_double(&dtext->x, dtext->var_values[VAR_X]); - normalize_double(&dtext->y, dtext->var_values[VAR_Y]); + s->x &= ~((1 << s->hsub) - 1); + s->y &= ~((1 << s->vsub) - 1); - if (dtext->x < 0) dtext->x = 0; - if (dtext->y < 0) dtext->y = 0; - if ((unsigned)dtext->x + (unsigned)dtext->w > inlink->w) - dtext->x = inlink->w - dtext->w; - if ((unsigned)dtext->y + (unsigned)dtext->h > inlink->h) - dtext->y = inlink->h - dtext->h; + av_log(ctx, AV_LOG_TRACE, "n:%d t:%f x:%d y:%d x+w:%d y+h:%d\n", + (int)s->var_values[VAR_N], s->var_values[VAR_T], + s->x, s->y, s->x+s->w, s->y+s->h); - dtext->x &= ~((1 << dtext->hsub) - 1); - dtext->y &= ~((1 << dtext->vsub) - 1); + if (s->draw) + draw_text(inlink->dst, frame, frame->width, frame->height); - av_dlog(ctx, "n:%d t:%f x:%d y:%d x+w:%d y+h:%d\n", - (int)dtext->var_values[VAR_N], dtext->var_values[VAR_T], - dtext->x, dtext->y, dtext->x+dtext->w, dtext->y+dtext->h); + s->var_values[VAR_N] += 1.0; - avfilter_start_frame(inlink->dst->outputs[0], inpicref); + return ff_filter_frame(inlink->dst->outputs[0], frame); } -static void end_frame(AVFilterLink *inlink) -{ - AVFilterLink *outlink = inlink->dst->outputs[0]; - AVFilterBufferRef *picref = inlink->cur_buf; - DrawTextContext *dtext = inlink->dst->priv; - - if (dtext->draw) - draw_text(inlink->dst, picref, picref->video->w, picref->video->h); - - dtext->var_values[VAR_N] += 1.0; +static const AVFilterPad avfilter_vf_drawtext_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .get_video_buffer = ff_null_get_video_buffer, + .filter_frame = filter_frame, + .config_props = config_input, + .needs_writable = 1, + }, + { NULL } +}; - avfilter_draw_slice(outlink, 0, picref->video->h, 1); - avfilter_end_frame(outlink); -} +static const AVFilterPad avfilter_vf_drawtext_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + }, + { NULL } +}; -AVFilter avfilter_vf_drawtext = { +AVFilter ff_vf_drawtext = { .name = "drawtext", .description = NULL_IF_CONFIG_SMALL("Draw text on top of video frames using libfreetype library."), .priv_size = sizeof(DrawTextContext), + .priv_class = &drawtext_class, .init = init, .uninit = uninit, .query_formats = query_formats, - .inputs = (AVFilterPad[]) {{ .name = "default", - .type = AVMEDIA_TYPE_VIDEO, - .get_video_buffer = avfilter_null_get_video_buffer, - .start_frame = start_frame, - .draw_slice = null_draw_slice, - .end_frame = end_frame, - .config_props = config_input, - .min_perms = AV_PERM_WRITE | - AV_PERM_READ, - .rej_perms = AV_PERM_PRESERVE }, - { .name = NULL}}, - .outputs = (AVFilterPad[]) {{ .name = "default", - .type = AVMEDIA_TYPE_VIDEO, }, - { .name = NULL}}, + .inputs = avfilter_vf_drawtext_inputs, + .outputs = avfilter_vf_drawtext_outputs, };