[FFmpeg-devel] [PATCH] avfilter: add mergeplanes
Paul B Mahol
onemda at gmail.com
Mon Sep 30 10:46:45 CEST 2013
Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
doc/filters.texi | 20 ++++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_mergeplanes.c | 227 +++++++++++++++++++++++++++++++++++++++++++
4 files changed, 249 insertions(+)
create mode 100644 libavfilter/vf_mergeplanes.c
diff --git a/doc/filters.texi b/doc/filters.texi
index bd39495..9d8c7cc 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -5248,6 +5248,26 @@ lutyuv=y='bitand(val, 128+64+32)'
@end example
@end itemize
+ at section mergeplanes
+
+Merge color channel components from several video streams.
+
+This filter accepts the following options:
+ at table @option
+ at item inputs
+Set the number of inputs. Default is 2.
+ at end table
+
+ at subsection Examples
+
+ at itemize
+ at item
+Merge four gray video streams into single video stream:
+ at example
+mergeplanes=4
+ at end example
+ at end itemize
+
@section mcdeint
Apply motion-compensation deinterlacing.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index b2d3587..0200e29 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -157,6 +157,7 @@ OBJS-$(CONFIG_LUT_FILTER) += vf_lut.o
OBJS-$(CONFIG_LUTRGB_FILTER) += vf_lut.o
OBJS-$(CONFIG_LUTYUV_FILTER) += vf_lut.o
OBJS-$(CONFIG_MCDEINT_FILTER) += vf_mcdeint.o
+OBJS-$(CONFIG_MERGEPLANES_FILTER) += vf_mergeplanes.o
OBJS-$(CONFIG_MP_FILTER) += vf_mp.o
OBJS-$(CONFIG_MPDECIMATE_FILTER) += vf_mpdecimate.o
OBJS-$(CONFIG_NEGATE_FILTER) += vf_lut.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index ed11d67..8f33281 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -153,6 +153,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(LUTRGB, lutrgb, vf);
REGISTER_FILTER(LUTYUV, lutyuv, vf);
REGISTER_FILTER(MCDEINT, mcdeint, vf);
+ REGISTER_FILTER(MERGEPLANES, mergeplanes, vf);
REGISTER_FILTER(MP, mp, vf);
REGISTER_FILTER(MPDECIMATE, mpdecimate, vf);
REGISTER_FILTER(NEGATE, negate, vf);
diff --git a/libavfilter/vf_mergeplanes.c b/libavfilter/vf_mergeplanes.c
new file mode 100644
index 0000000..31729cf
--- /dev/null
+++ b/libavfilter/vf_mergeplanes.c
@@ -0,0 +1,227 @@
+/*
+ * 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/avassert.h"
+#include "libavutil/avstring.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "avfilter.h"
+#include "drawutils.h"
+#include "internal.h"
+#include "framesync.h"
+
+typedef struct MergePlanesContext {
+ const AVClass *class;
+ unsigned nb_inputs;
+
+ int nb_planes[4];
+ int planewidth[4][4];
+ int planeheight[4][4];
+
+ FFFrameSync fs;
+ FFFrameSyncIn fsi[3]; /* must be immediately after fs */
+} MergePlanesContext;
+
+#define OFFSET(x) offsetof(MergePlanesContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+static const AVOption mergeplanes_options[] = {
+ { "inputs", "Number of input streams.", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, 4, FLAGS},
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(mergeplanes);
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+ MergePlanesContext *s = inlink->dst->priv;
+ return ff_framesync_filter_frame(&s->fs, inlink, in);
+}
+
+static int query_formats(AVFilterContext *ctx)
+{
+ MergePlanesContext *s = ctx->priv;
+ AVFilterFormats *in_formats = NULL;
+ AVFilterFormats *out_formats = NULL;
+ int i;
+
+ ff_add_format(&in_formats, AV_PIX_FMT_GRAY8);
+ switch (s->nb_inputs) {
+ case 4:
+ ff_add_format(&out_formats, AV_PIX_FMT_YUVA444P);
+ for (i = 0; i < s->nb_inputs; i++)
+ ff_formats_ref(in_formats, &ctx->inputs[i]->out_formats);
+ break;
+ case 3:
+ ff_add_format(&out_formats, AV_PIX_FMT_YUV444P);
+ ff_formats_ref(in_formats, &ctx->inputs[0]->out_formats);
+ ff_formats_ref(in_formats, &ctx->inputs[1]->out_formats);
+ ff_formats_ref(in_formats, &ctx->inputs[2]->out_formats);
+ break;
+ case 2:
+ ff_formats_ref(in_formats, &ctx->inputs[1]->out_formats);
+ in_formats = NULL;
+ ff_add_format(&in_formats, AV_PIX_FMT_YUV444P);
+ ff_formats_ref(in_formats, &ctx->inputs[0]->out_formats);
+ ff_add_format(&out_formats, AV_PIX_FMT_YUVA444P);
+ break;
+ }
+
+ ff_formats_ref(out_formats, &ctx->outputs[0]->in_formats);
+
+ return 0;
+}
+
+static int request_frame(AVFilterLink *outlink)
+{
+ MergePlanesContext *s = outlink->src->priv;
+ return ff_framesync_request_frame(&s->fs, outlink);
+}
+
+static void merge_planes(AVFilterContext *ctx, AVFrame *in[4], AVFrame *out)
+{
+ MergePlanesContext *s = ctx->priv;
+ int i, p, j = 0;
+
+ for (i = 0; i < s->nb_inputs; i++) {
+ for (p = 0; p < s->nb_planes[i]; p++, j++) {
+ av_image_copy_plane(out->data[j], out->linesize[j],
+ in[i]->data[p], in[i]->linesize[p],
+ s->planewidth[i][p], s->planeheight[i][p]);
+ }
+ }
+}
+
+static int process_frame(FFFrameSync *fs)
+{
+ AVFilterContext *ctx = fs->parent;
+ AVFilterLink *outlink = ctx->outputs[0];
+ MergePlanesContext *s = fs->opaque;
+ AVFrame *in[4] = { NULL };
+ AVFrame *out;
+ int i, ret = 0;
+
+ av_assert0(s->nb_inputs <= 4);
+ for (i = 0; i < s->nb_inputs; i++) {
+ if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], s->nb_inputs - (i + 1))) < 0)
+ return ret;
+ }
+
+ out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!out)
+ return AVERROR(ENOMEM);
+
+ out->pts = av_rescale_q(in[0]->pts, s->fs.time_base, outlink->time_base);
+ merge_planes(ctx, in, out);
+ ret = ff_filter_frame(outlink, out);
+
+ return ret;
+}
+
+static int config_output(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ MergePlanesContext *s = ctx->priv;
+ FFFrameSyncIn *in = s->fs.in;
+ int i, ret;
+
+ ff_framesync_init(&s->fs, ctx, s->nb_inputs);
+ s->fs.opaque = s;
+ s->fs.on_event = process_frame;
+
+ for (i = 0; i < s->nb_inputs; i++) {
+ AVFilterLink *inlink = ctx->inputs[i];
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+
+ if ((ret = av_image_fill_linesizes(s->planewidth[i], inlink->format, inlink->w)) < 0)
+ return ret;
+
+ s->planeheight[i][1] =
+ s->planeheight[i][2] = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
+ s->planeheight[i][0] =
+ s->planeheight[i][3] = inlink->h;
+ s->nb_planes[i] = av_pix_fmt_count_planes(inlink->format);
+
+ in[i].time_base = inlink->time_base;
+ in[i].sync = 1;
+ in[i].before = EXT_STOP;
+ in[i].after = EXT_STOP;
+ }
+
+ return ff_framesync_configure(&s->fs);
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ MergePlanesContext *s = ctx->priv;
+ int i;
+
+ ff_framesync_uninit(&s->fs);
+
+ for (i = 0; i < s->nb_inputs; i++) {
+ av_freep(&ctx->input_pads[i].name);
+ }
+}
+
+static av_cold int init(AVFilterContext *ctx)
+{
+ MergePlanesContext *s = ctx->priv;
+ int i, ret;
+
+ for (i = 0; i < s->nb_inputs; i++) {
+ AVFilterPad pad = { 0 };
+
+ pad.type = AVMEDIA_TYPE_VIDEO;
+ pad.name = av_asprintf("in%d", i);
+ if (!pad.name)
+ return AVERROR(ENOMEM);
+ pad.filter_frame = filter_frame;
+
+ if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0){
+ av_freep(&pad.name);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static const AVFilterPad mergeplanes_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_output,
+ .request_frame = request_frame,
+ },
+ { NULL }
+};
+
+AVFilter avfilter_vf_mergeplanes = {
+ .name = "mergeplanes",
+ .description = NULL_IF_CONFIG_SMALL("Merge planes."),
+ .priv_size = sizeof(MergePlanesContext),
+ .priv_class = &mergeplanes_class,
+ .init = init,
+ .uninit = uninit,
+ .query_formats = query_formats,
+ .inputs = NULL,
+ .outputs = mergeplanes_outputs,
+ .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
+};
--
1.7.11.2
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