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vf_drawtext: use the name 's' for the pointer to the private context

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This is shorter and consistent across filters.
This commit is contained in:
Anton Khirnov 2013-03-18 20:44:36 +01:00
parent 20e2794eea
commit d3735f7ad6
1 changed files with 152 additions and 152 deletions
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304
libavfilter/vf_drawtext.c
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@ -231,13 +231,13 @@ 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 */
@ -248,15 +248,15 @@ 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);
@ -266,7 +266,7 @@ static int load_glyph(AVFilterContext *ctx, Glyph **glyph_ptr, uint32_t code)
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;
@ -283,80 +283,80 @@ error:
static av_cold int init(AVFilterContext *ctx)
{
int err;
DrawTextContext *dtext = ctx->priv;
DrawTextContext *s = ctx->priv;
Glyph *glyph;
if (!dtext->fontfile) {
if (!s->fontfile) {
av_log(ctx, AV_LOG_ERROR, "No font filename provided\n");
return AVERROR(EINVAL);
}
if (dtext->textfile) {
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 (!(s->text = av_malloc(textbuf_size+1)))
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);
@ -366,7 +366,7 @@ static av_cold int init(AVFilterContext *ctx)
av_log(ctx, AV_LOG_ERROR, "Could not set tabsize.\n");
return err;
}
dtext->tabsize *= glyph->advance;
s->tabsize *= glyph->advance;
#if !HAVE_LOCALTIME_R
av_log(ctx, AV_LOG_WARNING, "strftime() expansion unavailable!\n");
@ -399,20 +399,20 @@ 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->expanded_text);
av_freep(&dtext->positions);
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_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;
}
}
@ -424,11 +424,11 @@ static inline int is_newline(uint32_t c)
static int dtext_prepare_text(AVFilterContext *ctx)
{
DrawTextContext *dtext = ctx->priv;
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 = dtext->text;
char *text = s->text;
uint8_t *p;
int str_w = 0, len;
int y_min = 32000, y_max = -32000;
@ -441,37 +441,37 @@ static int dtext_prepare_text(AVFilterContext *ctx)
#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;
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, &ltime);
while ((buf = av_realloc(buf, buf_size))) {
*buf = 1;
if (strftime(buf, buf_size, dtext->text, &ltime) != 0 || *buf == 0)
if (strftime(buf, buf_size, s->text, &ltime) != 0 || *buf == 0)
break;
buf_size *= 2;
}
if (!buf)
return AVERROR(ENOMEM);
text = dtext->expanded_text = buf;
dtext->expanded_text_size = buf_size;
text = s->expanded_text = buf;
s->expanded_text_size = buf_size;
#endif
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;
}
}
@ -481,7 +481,7 @@ static int dtext_prepare_text(AVFilterContext *ctx)
/* get glyph */
dummy.code = code;
glyph = av_tree_find(dtext->glyphs, &dummy, glyph_cmp, NULL);
glyph = av_tree_find(s->glyphs, &dummy, glyph_cmp, NULL);
if (!glyph) {
ret = load_glyph(ctx, &glyph, code);
if (ret)
@ -505,7 +505,7 @@ 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;
@ -514,11 +514,11 @@ 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;
}
@ -530,19 +530,19 @@ 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->var_values[VAR_TEXT_W] = dtext->var_values[VAR_TW] = dtext->w;
dtext->h = y;
dtext->var_values[VAR_TEXT_H] = dtext->var_values[VAR_TH] = dtext->h;
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;
}
@ -551,58 +551,58 @@ static int dtext_prepare_text(AVFilterContext *ctx)
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
DrawTextContext *dtext = ctx->priv;
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_N] = 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,
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(&dtext->y_pexpr, dtext->y_expr, var_names,
(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->d_pexpr, dtext->d_expr, var_names,
(ret = av_expr_parse(&s->d_pexpr, s->d_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);
}
@ -705,10 +705,10 @@ static inline void drawbox(AVFrame *frame, unsigned int x, unsigned int y,
}
}
static int draw_glyphs(DrawTextContext *dtext, AVFrame *frame,
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 = HAVE_LOCALTIME_R ? s->expanded_text : s->text;
uint32_t code = 0;
int i;
uint8_t *p;
@ -723,20 +723,20 @@ static int draw_glyphs(DrawTextContext *dtext, AVFrame *frame,
continue;
dummy.code = code;
glyph = av_tree_find(dtext->glyphs, &dummy, (void *)glyph_cmp, NULL);
glyph = av_tree_find(s->glyphs, &dummy, (void *)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) {
if (s->is_packed_rgb) {
draw_glyph_rgb(frame, &glyph->bitmap,
dtext->positions[i].x+x, dtext->positions[i].y+y, width, height,
dtext->pixel_step[0], rgbcolor, dtext->rgba_map);
s->positions[i].x+x, s->positions[i].y+y, width, height,
s->pixel_step[0], rgbcolor, s->rgba_map);
} else {
draw_glyph_yuv(frame, &glyph->bitmap,
dtext->positions[i].x+x, dtext->positions[i].y+y, width, height,
yuvcolor, dtext->hsub, dtext->vsub);
s->positions[i].x+x, s->positions[i].y+y, width, height,
yuvcolor, s->hsub, s->vsub);
}
}
@ -746,30 +746,30 @@ static int draw_glyphs(DrawTextContext *dtext, AVFrame *frame,
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(frame, 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 (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);
if (dtext->shadowx || dtext->shadowy) {
if ((ret = draw_glyphs(dtext, frame, width, height,
dtext->shadowcolor_rgba,
dtext->shadowcolor,
dtext->x + dtext->shadowx,
dtext->y + dtext->shadowy)) < 0)
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, frame, 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;
@ -793,7 +793,7 @@ static inline int normalize_double(int *n, double d)
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
AVFilterContext *ctx = inlink->dst;
DrawTextContext *dtext = ctx->priv;
DrawTextContext *s = ctx->priv;
int ret = 0;
if ((ret = dtext_prepare_text(ctx)) < 0) {
@ -802,40 +802,40 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
return ret;
}
dtext->var_values[VAR_T] = frame->pts == AV_NOPTS_VALUE ?
s->var_values[VAR_T] = frame->pts == AV_NOPTS_VALUE ?
NAN : frame->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);
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);
dtext->draw = av_expr_eval(dtext->d_pexpr, dtext->var_values, &dtext->prng);
s->draw = av_expr_eval(s->d_pexpr, s->var_values, &s->prng);
normalize_double(&dtext->x, dtext->var_values[VAR_X]);
normalize_double(&dtext->y, dtext->var_values[VAR_Y]);
normalize_double(&s->x, s->var_values[VAR_X]);
normalize_double(&s->y, s->var_values[VAR_Y]);
if (dtext->fix_bounds) {
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;
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;
}
dtext->x &= ~((1 << dtext->hsub) - 1);
dtext->y &= ~((1 << dtext->vsub) - 1);
s->x &= ~((1 << s->hsub) - 1);
s->y &= ~((1 << s->vsub) - 1);
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);
(int)s->var_values[VAR_N], s->var_values[VAR_T],
s->x, s->y, s->x+s->w, s->y+s->h);
if (dtext->draw)
if (s->draw)
draw_text(inlink->dst, frame, frame->width, frame->height);
dtext->var_values[VAR_N] += 1.0;
s->var_values[VAR_N] += 1.0;
return ff_filter_frame(inlink->dst->outputs[0], frame);
}