@@ -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:

@@ -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.

@@ -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

@@ -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);

@@ -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, \

new file mode 100644

@@ -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,

+};