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Factorize out some code and implement the fill_line_with_color()

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function. Allow to share code with the pending color source.

Originally committed as revision 24066 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Stefano Sabatini 2010-07-05 22:33:02 +00:00
parent c014631461
commit 039baa7813
1 changed files with 56 additions and 50 deletions
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106
libavfilter/vf_pad.c
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@ -29,6 +29,58 @@
#include "libavutil/pixdesc.h"
#include "libavutil/colorspace.h"
enum { RED = 0, GREEN, BLUE, ALPHA };
static int fill_line_with_color(uint8_t *line[4], int line_step[4], int w, uint8_t color[4],
enum PixelFormat pix_fmt, uint8_t rgba_color[4], int *is_packed_rgba)
{
uint8_t rgba_map[4] = {0};
int i;
const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[pix_fmt];
int hsub = pix_desc->log2_chroma_w;
*is_packed_rgba = 1;
switch (pix_fmt) {
case PIX_FMT_ARGB: rgba_map[ALPHA] = 0; rgba_map[RED ] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE ] = 3; break;
case PIX_FMT_ABGR: rgba_map[ALPHA] = 0; rgba_map[BLUE ] = 1; rgba_map[GREEN] = 2; rgba_map[RED ] = 3; break;
case PIX_FMT_RGBA:
case PIX_FMT_RGB24: rgba_map[RED ] = 0; rgba_map[GREEN] = 1; rgba_map[BLUE ] = 2; rgba_map[ALPHA] = 3; break;
case PIX_FMT_BGRA:
case PIX_FMT_BGR24: rgba_map[BLUE ] = 0; rgba_map[GREEN] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break;
default:
*is_packed_rgba = 0;
}
if (*is_packed_rgba) {
line_step[0] = (av_get_bits_per_pixel(pix_desc))>>3;
for (i = 0; i < 4; i++)
color[rgba_map[i]] = rgba_color[i];
line[0] = av_malloc(w * line_step[0]);
for (i = 0; i < w; i++)
memcpy(line[0] + i * line_step[0], color, line_step[0]);
} else {
int plane;
color[RED ] = RGB_TO_Y(rgba_color[0], rgba_color[1], rgba_color[2]);
color[GREEN] = RGB_TO_U(rgba_color[0], rgba_color[1], rgba_color[2], 0);
color[BLUE ] = RGB_TO_V(rgba_color[0], rgba_color[1], rgba_color[2], 0);
color[ALPHA] = rgba_color[3];
for (plane = 0; plane < 4; plane++) {
int line_size;
int hsub1 = (plane == 1 || plane == 2) ? hsub : 0;
line_step[plane] = 1;
line_size = (w >> hsub1) * line_step[plane];
line[plane] = av_malloc(line_size);
memset(line[plane], color[plane], line_size);
}
}
return 0;
}
typedef struct {
int w, h; ///< output dimensions, a value of 0 will result in the input size
int x, y; ///< offsets of the input area with respect to the padded area
@ -92,35 +144,13 @@ static int query_formats(AVFilterContext *ctx)
return 0;
}
enum { RED = 0, GREEN, BLUE, ALPHA };
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
PadContext *pad = ctx->priv;
const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[inlink->format];
uint8_t rgba_color[4];
uint8_t rgba_map[4] = {0};
int i, is_packed_rgb = 1;
switch (inlink->format) {
case PIX_FMT_ARGB:
rgba_map[ALPHA] = 0; rgba_map[RED] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE] = 3;
break;
case PIX_FMT_ABGR:
rgba_map[ALPHA] = 0; rgba_map[BLUE] = 1; rgba_map[GREEN] = 2; rgba_map[RED] = 3;
break;
case PIX_FMT_RGBA:
case PIX_FMT_RGB24:
rgba_map[RED] = 0; rgba_map[GREEN] = 1; rgba_map[BLUE] = 2; rgba_map[ALPHA] = 3;
break;
case PIX_FMT_BGRA:
case PIX_FMT_BGR24:
rgba_map[BLUE] = 0; rgba_map[GREEN] = 1; rgba_map[RED] = 2; rgba_map[ALPHA] = 3;
break;
default:
is_packed_rgb = 0;
}
int is_packed_rgba;
pad->hsub = pix_desc->log2_chroma_w;
pad->vsub = pix_desc->log2_chroma_h;
@ -139,37 +169,13 @@ static int config_input(AVFilterLink *inlink)
pad->in_h = inlink->h & ~((1 << pad->vsub) - 1);
memcpy(rgba_color, pad->color, sizeof(rgba_color));
if (is_packed_rgb) {
pad->line_step[0] = (av_get_bits_per_pixel(&av_pix_fmt_descriptors[inlink->format]))>>3;
for (i = 0; i < 4; i++)
pad->color[rgba_map[i]] = rgba_color[i];
pad->line[0] = av_malloc(pad->w * pad->line_step[0]);
for (i = 0; i < pad->w; i++)
memcpy(pad->line[0] + i * pad->line_step[0], pad->color, pad->line_step[0]);
} else {
int plane;
pad->color[0] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]);
pad->color[1] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
pad->color[2] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
pad->color[3] = rgba_color[3];
for (plane = 0; plane < 4; plane++) {
int line_size;
int hsub = (plane == 1 || plane == 2) ? pad->hsub : 0;
pad->line_step[plane] = 1;
line_size = (pad->w >> hsub) * pad->line_step[plane];
pad->line[plane] = av_malloc(line_size);
memset(pad->line[plane], pad->color[plane], line_size);
}
}
fill_line_with_color(pad->line, pad->line_step, pad->w, pad->color,
inlink->format, rgba_color, &is_packed_rgba);
av_log(ctx, AV_LOG_INFO, "w:%d h:%d x:%d y:%d color:0x%02X%02X%02X%02X[%s]\n",
pad->w, pad->h, pad->x, pad->y,
pad->color[0], pad->color[1], pad->color[2], pad->color[3],
is_packed_rgb ? "rgba" : "yuva");
is_packed_rgba ? "rgba" : "yuva");
if (pad->x < 0 || pad->y < 0 ||
pad->w <= 0 || pad->h <= 0 ||