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vf_ass: use drawutils.

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This commit is contained in:
Nicolas George 2012-03-28 15:51:13 +02:00
parent a63712d37c
commit 6c7b5b7b33
1 changed files with 12 additions and 49 deletions
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61
libavfilter/vf_ass.c
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@ -32,7 +32,6 @@
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "drawutils.h"
#include "avfilter.h"
@ -41,12 +40,12 @@ typedef struct {
ASS_Library *library;
ASS_Renderer *renderer;
ASS_Track *track;
int hsub, vsub;
char *filename;
uint8_t rgba_map[4];
int pix_step[4]; ///< steps per pixel for each plane of the main output
char *original_size_str;
int original_w, original_h;
FFDrawContext draw;
} AssContext;
#define OFFSET(x) offsetof(AssContext, x)
@ -156,28 +155,15 @@ static av_cold void uninit(AVFilterContext *ctx)
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_NONE
};
avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts));
avfilter_set_common_pixel_formats(ctx, ff_draw_supported_pixel_formats(0));
return 0;
}
static int config_input(AVFilterLink *inlink)
{
AssContext *ass = inlink->dst->priv;
const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[inlink->format];
av_image_fill_max_pixsteps(ass->pix_step, NULL, pix_desc);
ff_fill_rgba_map(ass->rgba_map, inlink->format);
ass->hsub = pix_desc->log2_chroma_w;
ass->vsub = pix_desc->log2_chroma_h;
ff_draw_init(&ass->draw, inlink->format, 0);
ass_set_frame_size (ass->renderer, inlink->w, inlink->h);
if (ass->original_w && ass->original_h)
@ -189,47 +175,24 @@ static int config_input(AVFilterLink *inlink)
static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { }
#define R 0
#define G 1
#define B 2
#define A 3
#define SET_PIXEL_RGB(picref, rgba_color, val, x, y, pixel_step, r_off, g_off, b_off) { \
p = picref->data[0] + (x) * pixel_step + ((y) * picref->linesize[0]); \
alpha = rgba_color[A] * (val) * 129; \
*(p+r_off) = (alpha * rgba_color[R] + (255*255*129 - alpha) * *(p+r_off)) >> 23; \
*(p+g_off) = (alpha * rgba_color[G] + (255*255*129 - alpha) * *(p+g_off)) >> 23; \
*(p+b_off) = (alpha * rgba_color[B] + (255*255*129 - alpha) * *(p+b_off)) >> 23; \
}
/* libass stores an RGBA color in the format RRGGBBTT, where TT is the transparency level */
#define AR(c) ( (c)>>24)
#define AG(c) (((c)>>16)&0xFF)
#define AB(c) (((c)>>8) &0xFF)
#define AA(c) ((0xFF-c) &0xFF)
static void overlay_ass_image(AVFilterBufferRef *picref, const uint8_t *rgba_map, const int pix_step,
static void overlay_ass_image(AssContext *ass, AVFilterBufferRef *picref,
const ASS_Image *image)
{
int i, j;
int alpha;
uint8_t *p;
const int ro = rgba_map[R];
const int go = rgba_map[G];
const int bo = rgba_map[B];
for (; image; image = image->next) {
uint8_t rgba_color[] = {AR(image->color), AG(image->color), AB(image->color), AA(image->color)};
unsigned char *row = image->bitmap;
for (i = 0; i < image->h; i++) {
for (j = 0; j < image->w; j++) {
if (row[j]) {
SET_PIXEL_RGB(picref, rgba_color, row[j], image->dst_x + j, image->dst_y + i, pix_step, ro, go, bo);
}
}
row += image->stride;
}
FFDrawColor color;
ff_draw_color(&ass->draw, &color, rgba_color);
ff_blend_mask(&ass->draw, &color,
picref->data, picref->linesize,
picref->video->w, picref->video->h,
image->bitmap, image->stride, image->w, image->h,
3, 0, image->dst_x, image->dst_y);
}
}
@ -247,7 +210,7 @@ static void end_frame(AVFilterLink *inlink)
if (detect_change)
av_log(ctx, AV_LOG_DEBUG, "Change happened at time ms:%f\n", time_ms);
overlay_ass_image(picref, ass->rgba_map, ass->pix_step[0], image);
overlay_ass_image(ass, picref, image);
avfilter_draw_slice(outlink, 0, picref->video->h, 1);
avfilter_end_frame(outlink);