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extractplanes filter 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
tags/n2.0
Paul B Mahol 12 years ago
parent
d29f9f4a0e
commit
ce322f4c19
6 changed files with 296 additions and 1 deletions
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  1. +1
    -0
      Changelog
  2. +38
    -0
      doc/filters.texi
  3. +1
    -0
      libavfilter/Makefile
  4. +1
    -0
      libavfilter/allfilters.c
  5. +1
    -1
      libavfilter/version.h
  6. +254
    -0
      libavfilter/vf_extractplanes.c

+ 1
- 0
Changelog View File

@@ -38,6 +38,7 @@ version <next>:
- ffmpeg -t and -ss (output-only) options are now sample-accurate when
transcoding audio
- Matroska muxer can now put the index at the beginning of the file.
- extractplanes filter


version 1.2:


+ 38
- 0
doc/filters.texi View File

@@ -3320,6 +3320,44 @@ Example:
edgedetect=low=0.1:high=0.4
@end example

@section extractplanes

Extract color channel components from input video stream into
separate grayscale video streams.

The filter accepts the following option:

@table @option
@item planes
Set plane(s) to extract.

Available values for planes are:
@table @samp
@item y
@item u
@item v
@item a
@item r
@item g
@item b
@end table

Choosing planes not available in the input will result in an error.
That means you cannot select @code{r}, @code{g}, @code{b} planes
with @code{y}, @code{u}, @code{v} planes at same time.
@end table

@subsection Examples

@itemize
@item
Extract luma, u and v color channel component from input video frame
into 3 grayscale outputs:
@example
ffmpeg -i video.avi -filter_complex 'extractplanes=y+u+v[y][u][v]' -map '[y]' y.avi -map '[u]' u.avi -map '[v]' v.avi
@end example
@end itemize

@section fade

Apply fade-in/out effect to input video.


+ 1
- 0
libavfilter/Makefile View File

@@ -121,6 +121,7 @@ OBJS-$(CONFIG_DESHAKE_FILTER) += vf_deshake.o
OBJS-$(CONFIG_DRAWBOX_FILTER) += vf_drawbox.o
OBJS-$(CONFIG_DRAWTEXT_FILTER) += vf_drawtext.o
OBJS-$(CONFIG_EDGEDETECT_FILTER) += vf_edgedetect.o
OBJS-$(CONFIG_EXTRACTPLANES_FILTER) += vf_extractplanes.o
OBJS-$(CONFIG_FADE_FILTER) += vf_fade.o
OBJS-$(CONFIG_FIELD_FILTER) += vf_field.o
OBJS-$(CONFIG_FIELDMATCH_FILTER) += vf_fieldmatch.o


+ 1
- 0
libavfilter/allfilters.c View File

@@ -119,6 +119,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(DRAWBOX, drawbox, vf);
REGISTER_FILTER(DRAWTEXT, drawtext, vf);
REGISTER_FILTER(EDGEDETECT, edgedetect, vf);
REGISTER_FILTER(EXTRACTPLANES, extractplanes, vf);
REGISTER_FILTER(FADE, fade, vf);
REGISTER_FILTER(FIELD, field, vf);
REGISTER_FILTER(FIELDMATCH, fieldmatch, vf);


+ 1
- 1
libavfilter/version.h View File

@@ -29,7 +29,7 @@
#include "libavutil/avutil.h"

#define LIBAVFILTER_VERSION_MAJOR 3
#define LIBAVFILTER_VERSION_MINOR 62
#define LIBAVFILTER_VERSION_MINOR 63
#define LIBAVFILTER_VERSION_MICRO 100

#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \


+ 254
- 0
libavfilter/vf_extractplanes.c View File

@@ -0,0 +1,254 @@
/*
* Copyright (c) 2013 Paul B Mahol
*
* 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
*/

#include "libavutil/avstring.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "internal.h"

#define PLANE_R 0x01
#define PLANE_G 0x02
#define PLANE_B 0x04
#define PLANE_A 0x08
#define PLANE_Y 0x10
#define PLANE_U 0x20
#define PLANE_V 0x40

typedef struct {
const AVClass *class;
int requested_planes;
int map[4];
int linesize[4];
} ExtractPlanesContext;

#define OFFSET(x) offsetof(ExtractPlanesContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption extractplanes_options[] = {
{ "planes", "set planes", OFFSET(requested_planes), AV_OPT_TYPE_FLAGS, {.i64=1}, 1, 0xff, FLAGS, "flags"},
{ "y", "set luma plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_Y}, 0, 0, FLAGS, "flags"},
{ "u", "set u plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_U}, 0, 0, FLAGS, "flags"},
{ "v", "set v plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_V}, 0, 0, FLAGS, "flags"},
{ "g", "set green plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_G}, 0, 0, FLAGS, "flags"},
{ "r", "set red plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_R}, 0, 0, FLAGS, "flags"},
{ "b", "set blue plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_B}, 0, 0, FLAGS, "flags"},
{ "a", "set alpha plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_A}, 0, 0, FLAGS, "flags"},
{ NULL }
};

AVFILTER_DEFINE_CLASS(extractplanes);

static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat in_pixfmts[] = {
AV_PIX_FMT_YUV410P,
AV_PIX_FMT_YUV411P,
AV_PIX_FMT_YUV440P,
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P,
AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA422P,
AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P,
AV_PIX_FMT_YUV420P16LE, AV_PIX_FMT_YUVA420P16LE,
AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_YUVA420P16BE,
AV_PIX_FMT_YUV422P16LE, AV_PIX_FMT_YUVA422P16LE,
AV_PIX_FMT_YUV422P16BE, AV_PIX_FMT_YUVA422P16BE,
AV_PIX_FMT_YUV444P16LE, AV_PIX_FMT_YUVA444P16LE,
AV_PIX_FMT_YUV444P16BE, AV_PIX_FMT_YUVA444P16BE,
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY8A,
AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_GRAY16BE,
AV_PIX_FMT_GBRP,
AV_PIX_FMT_GBRP16LE, AV_PIX_FMT_GBRP16BE,
AV_PIX_FMT_NONE,
};
static const enum AVPixelFormat out8_pixfmts[] = { AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE };
static const enum AVPixelFormat out16le_pixfmts[] = { AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_NONE };
static const enum AVPixelFormat out16be_pixfmts[] = { AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_NONE };
const enum AVPixelFormat *out_pixfmts;
const AVPixFmtDescriptor *desc;
AVFilterFormats *avff;
int i, depth = 0, be = 0;

if (!ctx->inputs[0]->in_formats ||
!ctx->inputs[0]->in_formats->format_count) {
return AVERROR(EAGAIN);
}

if (!ctx->inputs[0]->out_formats)
ff_formats_ref(ff_make_format_list(in_pixfmts), &ctx->inputs[0]->out_formats);

avff = ctx->inputs[0]->in_formats;
desc = av_pix_fmt_desc_get(avff->formats[0]);
depth = desc->comp[0].depth_minus1;
be = desc->flags & PIX_FMT_BE;
for (i = 1; i < avff->format_count; i++) {
desc = av_pix_fmt_desc_get(avff->formats[i]);
if (depth != desc->comp[0].depth_minus1 ||
be != (desc->flags & PIX_FMT_BE)) {
return AVERROR(EAGAIN);
}
}

if (depth == 7)
out_pixfmts = out8_pixfmts;
else if (be)
out_pixfmts = out16be_pixfmts;
else
out_pixfmts = out16le_pixfmts;

for (i = 0; i < ctx->nb_outputs; i++)
ff_formats_ref(ff_make_format_list(out_pixfmts), &ctx->outputs[i]->in_formats);
return 0;
}

static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
ExtractPlanesContext *e = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int plane_avail, ret;

plane_avail = ((desc->flags & PIX_FMT_RGB) ? PLANE_R|PLANE_G|PLANE_B :
PLANE_Y |
((desc->nb_components > 2) ? PLANE_U|PLANE_V : 0)) |
((desc->flags & PIX_FMT_ALPHA) ? PLANE_A : 0);
if (e->requested_planes & ~plane_avail) {
av_log(ctx, AV_LOG_ERROR, "Requested planes not available.\n");
return AVERROR(EINVAL);
}
if ((ret = av_image_fill_linesizes(e->linesize, inlink->format, inlink->w)) < 0)
return ret;

return 0;
}

static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = ctx->inputs[0];
ExtractPlanesContext *e = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
const int output = outlink->srcpad - ctx->output_pads;

if (e->map[output] == 1 || e->map[output] == 2) {
outlink->h = inlink->h >> desc->log2_chroma_h;
outlink->w = inlink->w >> desc->log2_chroma_w;
}

return 0;
}

static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
AVFilterContext *ctx = inlink->dst;
ExtractPlanesContext *e = ctx->priv;
int i, eof = 0, ret = 0;

for (i = 0; i < ctx->nb_outputs; i++) {
AVFilterLink *outlink = ctx->outputs[i];
const int idx = e->map[i];
AVFrame *out;

if (outlink->closed || !frame->data[idx])
continue;

out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
ret = AVERROR(ENOMEM);
break;
}
av_frame_copy_props(out, frame);

av_image_copy_plane(out->data[0], out->linesize[0],
frame->data[idx], frame->linesize[idx],
e->linesize[idx], outlink->h);
ret = ff_filter_frame(outlink, out);
if (ret == AVERROR_EOF)
eof++;
else if (ret < 0)
break;
}
av_frame_free(&frame);

if (eof == ctx->nb_outputs)
ret = AVERROR_EOF;
else if (ret == AVERROR_EOF)
ret = 0;
return ret;
}

static int init(AVFilterContext *ctx)
{
ExtractPlanesContext *e = ctx->priv;
int planes = (e->requested_planes & 0xf) | (e->requested_planes >> 4);
int i;

for (i = 0; i < 4; i++) {
char *name;
AVFilterPad pad = { 0 };

if (!(planes & (1 << i)))
continue;

name = av_asprintf("out%d", ctx->nb_outputs);
if (!name)
return AVERROR(ENOMEM);
e->map[ctx->nb_outputs] = i;
pad.name = name;
pad.type = AVMEDIA_TYPE_VIDEO;
pad.config_props = config_output;

ff_insert_outpad(ctx, ctx->nb_outputs, &pad);
}

return 0;
}

static void uninit(AVFilterContext *ctx)
{
int i;

for (i = 0; i < ctx->nb_outputs; i++)
av_freep(&ctx->output_pads[i].name);
}

static const AVFilterPad extractplanes_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
.config_props = config_input,
},
{ NULL }
};

AVFilter avfilter_vf_extractplanes = {
.name = "extractplanes",
.description = NULL_IF_CONFIG_SMALL("Extract planes as grayscale frames."),
.priv_size = sizeof(ExtractPlanesContext),
.priv_class = &extractplanes_class,
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.inputs = extractplanes_inputs,
.outputs = NULL,
.flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
};

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