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Add a slice_dir parameter to avfilter_draw_slice().

Browse Source 
Avoid the need to implement slice direction detection code, thus
reducing code duplication.

See the thread:
"[FFmpeg-devel] [PATCH] Add a slice_dir parameter to avfilter_start_frame()".

Originally committed as revision 20734 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Stefano Sabatini 2009-12-04 23:26:13 +00:00
parent 78149213cc
commit a13a543797
8 changed files with 30 additions and 33 deletions
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8
libavfilter/avfilter.c
View File

@ -287,13 +287,13 @@ void avfilter_end_frame(AVFilterLink *link)
}
void avfilter_draw_slice(AVFilterLink *link, int y, int h)
void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
{
uint8_t *src[4], *dst[4];
int i, j, hsub, vsub;
void (*draw_slice)(AVFilterLink *, int, int);
void (*draw_slice)(AVFilterLink *, int, int, int);
DPRINTF_START(NULL, draw_slice); dprintf_link(NULL, link, 0); dprintf(NULL, " y:%d h:%d\n", y, h);
DPRINTF_START(NULL, draw_slice); dprintf_link(NULL, link, 0); dprintf(NULL, " y:%d h:%d dir:%d\n", y, h, slice_dir);
/* copy the slice if needed for permission reasons */
if(link->srcpic) {
@ -325,7 +325,7 @@ void avfilter_draw_slice(AVFilterLink *link, int y, int h)
if(!(draw_slice = link_dpad(link).draw_slice))
draw_slice = avfilter_default_draw_slice;
draw_slice(link, y, h);
draw_slice(link, y, h, slice_dir);
}
#define MAX_REGISTERED_AVFILTERS_NB 64

12
libavfilter/avfilter.h
View File

@ -25,7 +25,7 @@
#include "libavutil/avutil.h"
#define LIBAVFILTER_VERSION_MAJOR 1
#define LIBAVFILTER_VERSION_MINOR 11
#define LIBAVFILTER_VERSION_MINOR 12
#define LIBAVFILTER_VERSION_MICRO 0
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
@ -322,7 +322,7 @@ struct AVFilterPad
*
* Input video pads only.
*/
void (*draw_slice)(AVFilterLink *link, int y, int height);
void (*draw_slice)(AVFilterLink *link, int y, int height, int slice_dir);
/**
* Frame poll callback. This returns the number of immediately available
@ -364,7 +364,7 @@ struct AVFilterPad
/** default handler for start_frame() for video inputs */
void avfilter_default_start_frame(AVFilterLink *link, AVFilterPicRef *picref);
/** default handler for draw_slice() for video inputs */
void avfilter_default_draw_slice(AVFilterLink *link, int y, int h);
void avfilter_default_draw_slice(AVFilterLink *link, int y, int h, int slice_dir);
/** default handler for end_frame() for video inputs */
void avfilter_default_end_frame(AVFilterLink *link);
/** default handler for config_props() for video outputs */
@ -566,8 +566,12 @@ void avfilter_end_frame(AVFilterLink *link);
* @param link the output link over which the frame is being sent
* @param y offset in pixels from the top of the image for this slice
* @param h height of this slice in pixels
* @param slice_dir the assumed direction for sending slices,
* from the top slice to the bottom slice if the value is 1,
* from the bottom slice to the top slice if the value is -1,
* for other values the behavior of the function is undefined.
*/
void avfilter_draw_slice(AVFilterLink *link, int y, int h);
void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir);
/** Initializes the filter system. Registers all builtin filters. */
void avfilter_register_all(void);

4
libavfilter/defaults.c
View File

@ -78,7 +78,7 @@ void avfilter_default_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
}
}
void avfilter_default_draw_slice(AVFilterLink *link, int y, int h)
void avfilter_default_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
{
AVFilterLink *out = NULL;
@ -86,7 +86,7 @@ void avfilter_default_draw_slice(AVFilterLink *link, int y, int h)
out = link->dst->outputs[0];
if(out)
avfilter_draw_slice(out, y, h);
avfilter_draw_slice(out, y, h, slice_dir);
}
void avfilter_default_end_frame(AVFilterLink *link)

4
libavfilter/vf_crop.c
View File

@ -195,7 +195,7 @@ static void start_frame(AVFilterLink *link, AVFilterPicRef *picref)
avfilter_start_frame(link->dst->outputs[0], ref2);
}
static void draw_slice(AVFilterLink *link, int y, int h)
static void draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
{
AVFilterContext *ctx = link->dst;
CropContext *crop = ctx->priv;
@ -210,7 +210,7 @@ static void draw_slice(AVFilterLink *link, int y, int h)
if (y + h > crop->y + crop->h)
h = crop->y + crop->h - y;
avfilter_draw_slice(ctx->outputs[0], y - crop->y, h);
avfilter_draw_slice(ctx->outputs[0], y - crop->y, h, slice_dir);
}
AVFilter avfilter_vf_crop = {

4
libavfilter/vf_format.c
View File

@ -112,9 +112,9 @@ static void end_frame(AVFilterLink *link)
avfilter_end_frame(link->dst->outputs[0]);
}
static void draw_slice(AVFilterLink *link, int y, int h)
static void draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
{
avfilter_draw_slice(link->dst->outputs[0], y, h);
avfilter_draw_slice(link->dst->outputs[0], y, h, slice_dir);
}
AVFilter avfilter_vf_format = {

21
libavfilter/vf_scale.c
View File

@ -38,7 +38,6 @@ typedef struct {
int hsub, vsub; ///< chroma subsampling
int slice_y; ///< top of current output slice
int slice_dir; ///< detected slice direction order for the current frame
int input_is_pal; ///< set to 1 if the input format is paletted
} ScaleContext;
@ -141,25 +140,19 @@ static void start_frame(AVFilterLink *link, AVFilterPicRef *picref)
(int64_t)picref->pixel_aspect.den * outlink->w * link->h,
INT_MAX);
scale->slice_dir = 0;
scale->slice_y = 0;
avfilter_start_frame(outlink, avfilter_ref_pic(outpicref, ~0));
}
static void draw_slice(AVFilterLink *link, int y, int h)
static void draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
{
ScaleContext *scale = link->dst->priv;
int out_h;
AVFilterPicRef *cur_pic = link->cur_pic;
uint8_t *data[4];
if (!scale->slice_dir) {
if (y != 0 && y + h != link->h) {
av_log(link->dst, AV_LOG_ERROR, "Slices start in the middle!\n");
return;
}
scale->slice_dir = y ? -1 : 1;
scale->slice_y = y ? link->dst->outputs[0]->h : y;
}
if (scale->slice_y == 0 && slice_dir == -1)
scale->slice_y = link->dst->outputs[0]->h;
data[0] = cur_pic->data[0] + y * cur_pic->linesize[0];
data[1] = scale->input_is_pal ?
@ -172,10 +165,10 @@ static void draw_slice(AVFilterLink *link, int y, int h)
link->dst->outputs[0]->outpic->data,
link->dst->outputs[0]->outpic->linesize);
if (scale->slice_dir == -1)
if (slice_dir == -1)
scale->slice_y -= out_h;
avfilter_draw_slice(link->dst->outputs[0], scale->slice_y, out_h);
if (scale->slice_dir == 1)
avfilter_draw_slice(link->dst->outputs[0], scale->slice_y, out_h, slice_dir);
if (slice_dir == 1)
scale->slice_y += out_h;
}

6
libavfilter/vf_slicify.c
View File

@ -73,16 +73,16 @@ static void end_frame(AVFilterLink *link)
avfilter_end_frame(link->dst->outputs[0]);
}
static void draw_slice(AVFilterLink *link, int y, int h)
static void draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
{
SliceContext *slice = link->dst->priv;
int y2;
for (y2 = y; y2 + slice->h <= y + h; y2 += slice->h)
avfilter_draw_slice(link->dst->outputs[0], y2, slice->h);
avfilter_draw_slice(link->dst->outputs[0], y2, slice->h, slice_dir);
if (y2 < y + h)
avfilter_draw_slice(link->dst->outputs[0], y2, y + h - y2);
avfilter_draw_slice(link->dst->outputs[0], y2, y + h - y2, slice_dir);
}
AVFilter avfilter_vf_slicify = {

4
libavfilter/vf_vflip.c
View File

@ -78,11 +78,11 @@ static void start_frame(AVFilterLink *link, AVFilterPicRef *picref)
avfilter_start_frame(link->dst->outputs[0], ref2);
}
static void draw_slice(AVFilterLink *link, int y, int h)
static void draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
{
AVFilterContext *ctx = link->dst;
avfilter_draw_slice(ctx->outputs[0], link->h - (y+h), h);
avfilter_draw_slice(ctx->outputs[0], link->h - (y+h), h, -1 * slice_dir);
}
AVFilter avfilter_vf_vflip = {