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Add transpose filter.

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Originally committed as revision 25525 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Stefano Sabatini
2010-10-18 21:29:37 +00:00
parent ff0652e503
commit 43945b2766
6 changed files with 257 additions and 1 deletions
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1
Changelog
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@@ -47,6 +47,7 @@ version <next>:
- SAP (Session Announcement Protocol, RFC 2974) muxer and demuxer - SAP (Session Announcement Protocol, RFC 2974) muxer and demuxer
- cropdetect filter - cropdetect filter
- ffmpeg -crop* options removed - ffmpeg -crop* options removed
- transpose filter added
version 0.6: version 0.6:

41
doc/filters.texi
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@@ -508,6 +508,47 @@ not specified it will use the default value of 16.
Adding this in the beginning of filter chains should make filtering Adding this in the beginning of filter chains should make filtering
faster due to better use of the memory cache. faster due to better use of the memory cache.
@section transpose
Transpose rows with columns in the input video and optionally flip it.
It accepts a parameter representing an integer, which can assume the
values:
@table @samp
@item 0
Rotate by 90 degrees counterclockwise and vertically flip (default), that is:
@example
L.R L.l
. . -> . .
l.r R.r
@end example
@item 1
Rotate by 90 degrees clockwise, that is:
@example
L.R l.L
. . -> . .
l.r r.R
@end example
@item 2
Rotate by 90 degrees counterclockwise, that is:
@example
L.R R.r
. . -> . .
l.r L.l
@end example
@item 3
Rotate by 90 degrees clockwise and vertically flip, that is:
@example
L.R r.R
. . -> . .
l.r l.L
@end example
@end table
@section unsharp @section unsharp
Sharpen or blur the input video. Sharpen or blur the input video.

1
libavfilter/Makefile
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@@ -38,6 +38,7 @@ OBJS-$(CONFIG_PIXELASPECT_FILTER) += vf_aspect.o
OBJS-$(CONFIG_SCALE_FILTER) += vf_scale.o OBJS-$(CONFIG_SCALE_FILTER) += vf_scale.o
OBJS-$(CONFIG_SETTB_FILTER) += vf_settb.o OBJS-$(CONFIG_SETTB_FILTER) += vf_settb.o
OBJS-$(CONFIG_SLICIFY_FILTER) += vf_slicify.o OBJS-$(CONFIG_SLICIFY_FILTER) += vf_slicify.o
OBJS-$(CONFIG_TRANSPOSE_FILTER) += vf_transpose.o
OBJS-$(CONFIG_UNSHARP_FILTER) += vf_unsharp.o OBJS-$(CONFIG_UNSHARP_FILTER) += vf_unsharp.o
OBJS-$(CONFIG_VFLIP_FILTER) += vf_vflip.o OBJS-$(CONFIG_VFLIP_FILTER) += vf_vflip.o
OBJS-$(CONFIG_YADIF_FILTER) += vf_yadif.o OBJS-$(CONFIG_YADIF_FILTER) += vf_yadif.o

1
libavfilter/allfilters.c
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@@ -58,6 +58,7 @@ void avfilter_register_all(void)
REGISTER_FILTER (SCALE, scale, vf); REGISTER_FILTER (SCALE, scale, vf);
REGISTER_FILTER (SETTB, settb, vf); REGISTER_FILTER (SETTB, settb, vf);
REGISTER_FILTER (SLICIFY, slicify, vf); REGISTER_FILTER (SLICIFY, slicify, vf);
REGISTER_FILTER (TRANSPOSE, transpose, vf);
REGISTER_FILTER (UNSHARP, unsharp, vf); REGISTER_FILTER (UNSHARP, unsharp, vf);
REGISTER_FILTER (VFLIP, vflip, vf); REGISTER_FILTER (VFLIP, vflip, vf);
REGISTER_FILTER (YADIF, yadif, vf); REGISTER_FILTER (YADIF, yadif, vf);

2
libavfilter/avfilter.h
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@@ -25,7 +25,7 @@
#include "libavutil/avutil.h" #include "libavutil/avutil.h"
#define LIBAVFILTER_VERSION_MAJOR 1 #define LIBAVFILTER_VERSION_MAJOR 1
#define LIBAVFILTER_VERSION_MINOR 52 #define LIBAVFILTER_VERSION_MINOR 53
#define LIBAVFILTER_VERSION_MICRO 0 #define LIBAVFILTER_VERSION_MICRO 0
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \ #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \

212
libavfilter/vf_transpose.c Normal file
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@@ -0,0 +1,212 @@
/*
* Copyright (C) 2010 Stefano Sabatini
* Copyright (C) 2008 Vitor Sessak
*
* 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
* transposition filter
* Based on MPlayer libmpcodecs/vf_rotate.c.
*/
#include "libavutil/intreadwrite.h"
#include "libavutil/pixdesc.h"
#include "libavcore/imgutils.h"
#include "avfilter.h"
typedef struct {
int hsub, vsub;
int pixsteps[4];
/* 0 Rotate by 90 degrees counterclockwise and vflip. */
/* 1 Rotate by 90 degrees clockwise. */
/* 2 Rotate by 90 degrees counterclockwise. */
/* 3 Rotate by 90 degrees clockwise and vflip. */
int dir;
} TransContext;
static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
{
TransContext *trans = ctx->priv;
trans->dir = 0;
if (args)
sscanf(args, "%d", &trans->dir);
if (trans->dir < 0 || trans->dir > 3) {
av_log(ctx, AV_LOG_ERROR, "Invalid value %d not between 0 and 3.\n",
trans->dir);
return AVERROR(EINVAL);
}
return 0;
}
static int query_formats(AVFilterContext *ctx)
{
enum PixelFormat pix_fmts[] = {
PIX_FMT_ARGB, PIX_FMT_RGBA,
PIX_FMT_ABGR, PIX_FMT_BGRA,
PIX_FMT_RGB24, PIX_FMT_BGR24,
PIX_FMT_RGB565BE, PIX_FMT_RGB565LE,
PIX_FMT_RGB555BE, PIX_FMT_RGB555LE,
PIX_FMT_BGR565BE, PIX_FMT_BGR565LE,
PIX_FMT_BGR555BE, PIX_FMT_BGR555LE,
PIX_FMT_GRAY16BE, PIX_FMT_GRAY16LE,
PIX_FMT_YUV420P16LE, PIX_FMT_YUV420P16BE,
PIX_FMT_YUV422P16LE, PIX_FMT_YUV422P16BE,
PIX_FMT_YUV444P16LE, PIX_FMT_YUV444P16BE,
PIX_FMT_NV12, PIX_FMT_NV21,
PIX_FMT_RGB8, PIX_FMT_BGR8,
PIX_FMT_RGB4_BYTE, PIX_FMT_BGR4_BYTE,
PIX_FMT_YUV444P, PIX_FMT_YUV422P,
PIX_FMT_YUV420P, PIX_FMT_YUVJ420P,
PIX_FMT_YUV411P, PIX_FMT_YUV410P,
PIX_FMT_YUVJ444P, PIX_FMT_YUVJ422P,
PIX_FMT_YUV440P, PIX_FMT_YUVJ440P,
PIX_FMT_YUVA420P, PIX_FMT_GRAY8,
PIX_FMT_NONE
};
avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
return 0;
}
static int config_props_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
TransContext *trans = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
const AVPixFmtDescriptor *pixdesc = &av_pix_fmt_descriptors[outlink->format];
trans->hsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_w;
trans->vsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_h;
av_image_fill_max_pixsteps(trans->pixsteps, NULL, pixdesc);
outlink->w = inlink->h;
outlink->h = inlink->w;
av_log(ctx, AV_LOG_INFO, "w:%d h:%d dir:%d -> w:%d h:%d rotation:%s vflip:%d\n",
inlink->w, inlink->h, trans->dir, outlink->w, outlink->h,
trans->dir == 1 || trans->dir == 3 ? "clockwise" : "counterclockwise",
trans->dir == 0 || trans->dir == 3);
return 0;
}
static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
{
AVFilterLink *outlink = inlink->dst->outputs[0];
outlink->out_buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
outlink->w, outlink->h);
outlink->out_buf->pts = picref->pts;
if (picref->video->pixel_aspect.num == 0) {
outlink->out_buf->video->pixel_aspect = picref->video->pixel_aspect;
} else {
outlink->out_buf->video->pixel_aspect.num = picref->video->pixel_aspect.den;
outlink->out_buf->video->pixel_aspect.den = picref->video->pixel_aspect.num;
}
avfilter_start_frame(outlink, avfilter_ref_buffer(outlink->out_buf, ~0));
}
static void end_frame(AVFilterLink *inlink)
{
TransContext *trans = inlink->dst->priv;
AVFilterBufferRef *inpic = inlink->cur_buf;
AVFilterBufferRef *outpic = inlink->dst->outputs[0]->out_buf;
AVFilterLink *outlink = inlink->dst->outputs[0];
int plane;
for (plane = 0; outpic->data[plane]; plane++) {
int hsub = plane == 1 || plane == 2 ? trans->hsub : 0;
int vsub = plane == 1 || plane == 2 ? trans->vsub : 0;
int pixstep = trans->pixsteps[plane];
int inh = inpic->video->h>>vsub;
int outw = outpic->video->w>>hsub;
int outh = outpic->video->h>>vsub;
uint8_t *out, *in;
int outlinesize, inlinesize;
int x, y;
out = outpic->data[plane]; outlinesize = outpic->linesize[plane];
in = inpic ->data[plane]; inlinesize = inpic ->linesize[plane];
if (trans->dir&1) {
in += inpic->linesize[plane] * (inh-1);
inlinesize *= -1;
}
if (trans->dir&2) {
out += outpic->linesize[plane] * (outh-1);
outlinesize *= -1;
}
for (y = 0; y < outh; y++) {
switch (pixstep) {
case 1:
for (x = 0; x < outw; x++)
out[x] = in[x*inlinesize + y];
break;
case 2:
for (x = 0; x < outw; x++)
*((uint16_t *)(out + 2*x)) = *((uint16_t *)(in + x*inlinesize + y*2));
break;
case 3:
for (x = 0; x < outw; x++) {
int32_t v = AV_RB24(in + x*inlinesize + y*3);
AV_WB24(out + 3*x, v);
}
break;
case 4:
for (x = 0; x < outw; x++)
*((uint32_t *)(out + 4*x)) = *((uint32_t *)(in + x*inlinesize + y*4));
break;
}
out += outlinesize;
}
}
avfilter_unref_buffer(inpic);
avfilter_draw_slice(outlink, 0, outpic->video->h, 1);
avfilter_end_frame(outlink);
avfilter_unref_buffer(outpic);
}
AVFilter avfilter_vf_transpose = {
.name = "transpose",
.description = NULL_IF_CONFIG_SMALL("Transpose input video."),
.init = init,
.priv_size = sizeof(TransContext),
.query_formats = query_formats,
.inputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.start_frame = start_frame,
.end_frame = end_frame,
.min_perms = AV_PERM_READ, },
{ .name = NULL}},
.outputs = (AVFilterPad[]) {{ .name = "default",
.config_props = config_props_output,
.type = AVMEDIA_TYPE_VIDEO, },
{ .name = NULL}},
};