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Add pad filter.

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Originally committed as revision 23046 to svn://svn.ffmpeg.org/ffmpeg/trunk
oldabi
Michael Niedermayer 15 years ago
parent 26b7199e12
commit 3c940173c0
3 changed files with 328 additions and 0 deletions
Unified View
  1. 1
      libavfilter/Makefile
  2. 1
      libavfilter/allfilters.c
  3. 326
      libavfilter/vf_pad.c

1
libavfilter/Makefile
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@ -19,6 +19,7 @@ OBJS-$(CONFIG_CROP_FILTER) += vf_crop.o
OBJS-$(CONFIG_FORMAT_FILTER) += vf_format.o OBJS-$(CONFIG_FORMAT_FILTER) += vf_format.o
OBJS-$(CONFIG_NOFORMAT_FILTER) += vf_format.o OBJS-$(CONFIG_NOFORMAT_FILTER) += vf_format.o
OBJS-$(CONFIG_NULL_FILTER) += vf_null.o OBJS-$(CONFIG_NULL_FILTER) += vf_null.o
OBJS-$(CONFIG_PAD_FILTER) += vf_pad.o
OBJS-$(CONFIG_PIXELASPECT_FILTER) += vf_aspect.o OBJS-$(CONFIG_PIXELASPECT_FILTER) += vf_aspect.o
OBJS-$(CONFIG_SCALE_FILTER) += vf_scale.o OBJS-$(CONFIG_SCALE_FILTER) += vf_scale.o
OBJS-$(CONFIG_SLICIFY_FILTER) += vf_slicify.o OBJS-$(CONFIG_SLICIFY_FILTER) += vf_slicify.o

1
libavfilter/allfilters.c
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@ -39,6 +39,7 @@ void avfilter_register_all(void)
REGISTER_FILTER (FORMAT, format, vf); REGISTER_FILTER (FORMAT, format, vf);
REGISTER_FILTER (NOFORMAT, noformat, vf); REGISTER_FILTER (NOFORMAT, noformat, vf);
REGISTER_FILTER (NULL, null, vf); REGISTER_FILTER (NULL, null, vf);
REGISTER_FILTER (PAD, pad, vf);
REGISTER_FILTER (PIXELASPECT, pixelaspect, vf); REGISTER_FILTER (PIXELASPECT, pixelaspect, vf);
REGISTER_FILTER (SCALE, scale, vf); REGISTER_FILTER (SCALE, scale, vf);
REGISTER_FILTER (SLICIFY, slicify, vf); REGISTER_FILTER (SLICIFY, slicify, vf);

326
libavfilter/vf_pad.c
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@ -0,0 +1,326 @@
/*
* copyright (c) 2008 vmrsss
* copyright (c) 2009 Stefano Sabatini
*
* 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 libavfilter/vf_pad.c
* video padding filter
*/
#include "avfilter.h"
#include "parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavcodec/colorspace.h"
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
int in_w, in_h; ///< width and height for the padded input video, which has to be aligned to the chroma values in order to avoid chroma issues
uint8_t color[4]; ///< color expressed either in YUVA or RGBA colorspace for the padding area
uint8_t *line[4];
int line_step[4];
int hsub, vsub; ///< chroma subsampling values
} PadContext;
static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
{
PadContext *pad = ctx->priv;
char color_string[128] = "black";
if (args)
sscanf(args, "%d:%d:%d:%d:%s", &pad->w, &pad->h, &pad->x, &pad->y, color_string);
if (av_parse_color(pad->color, color_string, ctx) < 0)
return -1;
/* sanity check params */
if (pad->w < 0 || pad->h < 0) {
av_log(ctx, AV_LOG_ERROR, "Negative size values are not acceptable.\n");
return -1;
}
return 0;
}
static av_cold void uninit(AVFilterContext *ctx)
{
PadContext *pad = ctx->priv;
int i;
for (i = 0; i < 4; i++) {
av_freep(&pad->line[i]);
pad->line_step[i] = 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_YUV444P, PIX_FMT_YUV422P,
PIX_FMT_YUV420P, PIX_FMT_YUV411P,
PIX_FMT_YUV410P, PIX_FMT_YUV440P,
PIX_FMT_YUVJ444P, PIX_FMT_YUVJ422P,
PIX_FMT_YUVJ420P, PIX_FMT_YUVJ440P,
PIX_FMT_YUVA420P,
PIX_FMT_NONE
};
avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
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];
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;
}
pad->hsub = pix_desc->log2_chroma_w;
pad->vsub = pix_desc->log2_chroma_h;
if (!pad->w)
pad->w = inlink->w;
if (!pad->h)
pad->h = inlink->h;
pad->w &= ~((1 << pad->hsub) - 1);
pad->h &= ~((1 << pad->vsub) - 1);
pad->x &= ~((1 << pad->hsub) - 1);
pad->y &= ~((1 << pad->vsub) - 1);
pad->in_w = inlink->w & ~((1 << pad->hsub) - 1);
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);
}
}
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");
if (pad->x < 0 || pad->y < 0 ||
pad->w <= 0 || pad->h <= 0 ||
(unsigned)pad->x + (unsigned)inlink->w > pad->w ||
(unsigned)pad->y + (unsigned)inlink->h > pad->h) {
av_log(ctx, AV_LOG_ERROR,
"Input area %d:%d:%d:%d not within the padded area 0:0:%d:%d or zero-sized\n",
pad->x, pad->y, pad->x + inlink->w, pad->y + inlink->h, pad->w, pad->h);
return -1;
}
return 0;
}
static int config_output(AVFilterLink *outlink)
{
PadContext *pad = outlink->src->priv;
outlink->w = pad->w;
outlink->h = pad->h;
return 0;
}
static AVFilterPicRef *get_video_buffer(AVFilterLink *inlink, int perms, int w, int h)
{
PadContext *pad = inlink->dst->priv;
AVFilterPicRef *picref = avfilter_get_video_buffer(inlink->dst->outputs[0], perms,
w + (pad->w - pad->in_w),
h + (pad->h - pad->in_h));
for (int plane = 0; plane < 4 && picref->data[plane]; plane++) {
int hsub = (plane == 1 || plane == 2) ? pad->hsub : 0;
int vsub = (plane == 1 || plane == 2) ? pad->vsub : 0;
picref->data[plane] += (pad->x >> hsub) * pad->line_step[plane] +
(pad->y >> vsub) * picref->linesize[plane];
}
return picref;
}
static void start_frame(AVFilterLink *inlink, AVFilterPicRef *inpicref)
{
PadContext *pad = inlink->dst->priv;
AVFilterPicRef *outpicref = avfilter_ref_pic(inpicref, ~0);
inlink->dst->outputs[0]->outpic = outpicref;
for (int plane = 0; plane < 4 && outpicref->data[plane]; plane++) {
int hsub = (plane == 1 || plane == 2) ? pad->hsub : 0;
int vsub = (plane == 1 || plane == 2) ? pad->vsub : 0;
outpicref->data[plane] -= (pad->x >> hsub) * pad->line_step[plane] +
(pad->y >> vsub) * outpicref->linesize[plane];
}
avfilter_start_frame(inlink->dst->outputs[0], outpicref);
}
static void end_frame(AVFilterLink *link)
{
avfilter_end_frame(link->dst->outputs[0]);
avfilter_unref_pic(link->cur_pic);
}
static void draw_rectangle(AVFilterPicRef *outpic, uint8_t *line[4], int line_step[4],
int hsub, int vsub, int x, int y, int w, int h)
{
int i, plane;
uint8_t *p;
for (plane = 0; plane < 4 && outpic->data[plane]; plane++) {
int hsub1 = plane == 1 || plane == 2 ? hsub : 0;
int vsub1 = plane == 1 || plane == 2 ? vsub : 0;
p = outpic->data[plane] + (y >> vsub1) * outpic->linesize[plane];
for (i = 0; i < (h >> vsub1); i++) {
memcpy(p + (x >> hsub1) * line_step[plane], line[plane], (w >> hsub1) * line_step[plane]);
p += outpic->linesize[plane];
}
}
}
static void draw_send_bar_slice(AVFilterLink *link, int y, int h, int slice_dir, int before_slice)
{
PadContext *pad = link->dst->priv;
int bar_y, bar_h = 0;
if (slice_dir * before_slice == 1 && y == pad->y) {
/* top bar */
bar_y = 0;
bar_h = pad->y;
} else if (slice_dir * before_slice == -1 && (y + h) == (pad->y + pad->in_h)) {
/* bottom bar */
bar_y = pad->y + pad->in_h;
bar_h = pad->h - pad->in_h - pad->y;
}
if (bar_h) {
draw_rectangle(link->dst->outputs[0]->outpic,
pad->line, pad->line_step, pad->hsub, pad->vsub,
0, bar_y, pad->w, bar_h);
avfilter_draw_slice(link->dst->outputs[0], bar_y, bar_h, slice_dir);
}
}
static void draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
{
PadContext *pad = link->dst->priv;
AVFilterPicRef *outpic = link->dst->outputs[0]->outpic;
y += pad->y;
y &= ~((1 << pad->vsub) - 1);
h &= ~((1 << pad->vsub) - 1);
if (!h)
return;
draw_send_bar_slice(link, y, h, slice_dir, 1);
/* left border */
draw_rectangle(outpic, pad->line, pad->line_step, pad->hsub, pad->vsub,
0, y, pad->x, h);
/* right border */
draw_rectangle(outpic, pad->line, pad->line_step, pad->hsub, pad->vsub,
pad->x + pad->in_w, y, pad->w - pad->x - pad->in_w, h);
avfilter_draw_slice(link->dst->outputs[0], y, h, slice_dir);
draw_send_bar_slice(link, y, h, slice_dir, -1);
}
AVFilter avfilter_vf_pad = {
.name = "pad",
.description = "Add pads to the input image.",
.priv_size = sizeof(PadContext),
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.inputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input,
.get_video_buffer = get_video_buffer,
.start_frame = start_frame,
.draw_slice = draw_slice,
.end_frame = end_frame, },
{ .name = NULL}},
.outputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output, },
{ .name = NULL}},
};
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