[FFmpeg-devel] [PATCH] avfilter: add hstack & vstack filter
Paul B Mahol
onemda at gmail.com
Tue Aug 25 00:09:26 CEST 2015
Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
doc/filters.texi | 24 +++++
libavfilter/Makefile | 2 +
libavfilter/allfilters.c | 2 +
libavfilter/vf_stack.c | 255 +++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 283 insertions(+)
create mode 100644 libavfilter/vf_stack.c
diff --git a/doc/filters.texi b/doc/filters.texi
index 2f7b0fa..7b52971 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -6589,6 +6589,18 @@ Set the scaling dimension: @code{2} for @code{hq2x}, @code{3} for
Default is @code{3}.
@end table
+ at section hstack
+Stack streams horizontally.
+
+All streams must be of same pixel format and of same height.
+
+The filter accept the following option:
+
+ at table @option
+ at item nb_inputs
+Set number of input streams. Default is 2.
+ at end table
+
@section hue
Modify the hue and/or the saturation of the input.
@@ -10892,6 +10904,18 @@ vignette='PI/4+random(1)*PI/50':eval=frame
@end itemize
+ at section vstack
+Stack streams vertically.
+
+All streams must be of same pixel format and of same width.
+
+The filter accept the following option:
+
+ at table @option
+ at item nb_inputs
+Set number of input streams. Default is 2.
+ at end table
+
@section w3fdif
Deinterlace the input video ("w3fdif" stands for "Weston 3 Field
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index aa34d8b..e9cd9c6 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -153,6 +153,7 @@ OBJS-$(CONFIG_HISTEQ_FILTER) += vf_histeq.o
OBJS-$(CONFIG_HISTOGRAM_FILTER) += vf_histogram.o
OBJS-$(CONFIG_HQDN3D_FILTER) += vf_hqdn3d.o
OBJS-$(CONFIG_HQX_FILTER) += vf_hqx.o
+OBJS-$(CONFIG_HSTACK_FILTER) += vf_stack.o
OBJS-$(CONFIG_HUE_FILTER) += vf_hue.o
OBJS-$(CONFIG_IDET_FILTER) += vf_idet.o
OBJS-$(CONFIG_IL_FILTER) += vf_il.o
@@ -231,6 +232,7 @@ OBJS-$(CONFIG_VFLIP_FILTER) += vf_vflip.o
OBJS-$(CONFIG_VIDSTABDETECT_FILTER) += vidstabutils.o vf_vidstabdetect.o
OBJS-$(CONFIG_VIDSTABTRANSFORM_FILTER) += vidstabutils.o vf_vidstabtransform.o
OBJS-$(CONFIG_VIGNETTE_FILTER) += vf_vignette.o
+OBJS-$(CONFIG_VSTACK_FILTER) += vf_stack.o
OBJS-$(CONFIG_W3FDIF_FILTER) += vf_w3fdif.o
OBJS-$(CONFIG_WAVEFORM_FILTER) += vf_waveform.o
OBJS-$(CONFIG_XBR_FILTER) += vf_xbr.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 353a1dc..0a1bdfd 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -169,6 +169,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(HISTOGRAM, histogram, vf);
REGISTER_FILTER(HQDN3D, hqdn3d, vf);
REGISTER_FILTER(HQX, hqx, vf);
+ REGISTER_FILTER(HSTACK, hstack, vf);
REGISTER_FILTER(HUE, hue, vf);
REGISTER_FILTER(IDET, idet, vf);
REGISTER_FILTER(IL, il, vf);
@@ -246,6 +247,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(VIDSTABDETECT, vidstabdetect, vf);
REGISTER_FILTER(VIDSTABTRANSFORM, vidstabtransform, vf);
REGISTER_FILTER(VIGNETTE, vignette, vf);
+ REGISTER_FILTER(VSTACK, vstack, vf);
REGISTER_FILTER(W3FDIF, w3fdif, vf);
REGISTER_FILTER(WAVEFORM, waveform, vf);
REGISTER_FILTER(XBR, xbr, vf);
diff --git a/libavfilter/vf_stack.c b/libavfilter/vf_stack.c
new file mode 100644
index 0000000..a8062fc
--- /dev/null
+++ b/libavfilter/vf_stack.c
@@ -0,0 +1,255 @@
+/*
+ * Copyright (c) 2015 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 "formats.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct StackContext {
+ const AVClass *class;
+ const AVPixFmtDescriptor *desc;
+ int nb_inputs;
+ int is_vertical;
+ int nb_planes;
+
+ AVFrame **frames;
+} StackContext;
+
+static const enum AVPixelFormat pix_fmts[] = {
+ AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
+ AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVJ420P,
+ AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
+ AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
+ AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
+ AV_PIX_FMT_GRAY8,
+ AV_PIX_FMT_NONE
+};
+
+static int query_formats(AVFilterContext *ctx)
+{
+ AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
+ if (!fmts_list)
+ return AVERROR(ENOMEM);
+ return ff_set_common_formats(ctx, fmts_list);
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
+{
+ AVFilterContext *ctx = inlink->dst;
+ StackContext *s = ctx->priv;
+ int i;
+
+ for (i = 0; i < s->nb_inputs; i++)
+ if (ctx->inputs[i] == inlink)
+ break;
+
+ s->frames[i] = frame;
+
+ return 0;
+}
+
+static av_cold int init(AVFilterContext *ctx)
+{
+ StackContext *s = ctx->priv;
+ int i, ret;
+
+ if (!strcmp(ctx->filter->name, "vstack"))
+ s->is_vertical = 1;
+
+ s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
+ if (!s->frames)
+ return AVERROR(ENOMEM);
+
+ for (i = 0; i < s->nb_inputs; i++) {
+ AVFilterPad pad = { 0 };
+
+ pad.type = AVMEDIA_TYPE_VIDEO;
+ pad.name = av_asprintf("input%d", i);
+ if (!pad.name)
+ return AVERROR(ENOMEM);
+ pad.filter_frame = filter_frame;
+ pad.needs_fifo = 1;
+
+ if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0) {
+ av_freep(&pad.name);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ StackContext *s = ctx->priv;
+ int i;
+
+ if (s->frames)
+ for (i = 0; i < s->nb_inputs; i++)
+ av_frame_free(&s->frames[i]);
+
+ av_freep(&s->frames);
+}
+
+static int config_output(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ StackContext *s = ctx->priv;
+ AVRational time_base = ctx->inputs[0]->time_base;
+ AVRational frame_rate = ctx->inputs[0]->frame_rate;
+ int height = ctx->inputs[0]->h;
+ int width = ctx->inputs[0]->w;
+ int i;
+
+ if (s->is_vertical) {
+ for (i = 1; i < s->nb_inputs; i++) {
+ if (ctx->inputs[i]->w != width) {
+ av_log(ctx, AV_LOG_ERROR, "Input %d width %d does not match input %d width %d.\n", i, ctx->inputs[i]->w, 0, width);
+ return AVERROR(EINVAL);
+ }
+ height += ctx->inputs[i]->h;
+ }
+ } else {
+ for (i = 1; i < s->nb_inputs; i++) {
+ if (ctx->inputs[i]->h != height) {
+ av_log(ctx, AV_LOG_ERROR, "Input %d height %d does not match input %d height %d.\n", i, ctx->inputs[i]->h, 0, height);
+ return AVERROR(EINVAL);
+ }
+ width += ctx->inputs[i]->w;
+ }
+ }
+
+ s->desc = av_pix_fmt_desc_get(outlink->format);
+ if (!s->desc)
+ return AVERROR_BUG;
+ s->nb_planes = s->desc->nb_components;
+
+ outlink->w = width;
+ outlink->h = height;
+ outlink->time_base = time_base;
+ outlink->frame_rate= frame_rate;
+
+ return 0;
+}
+
+static int request_frame(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ StackContext *s = ctx->priv;
+ AVFrame *out;
+ int ret, i, p, offset[4] = { 0 };
+
+ for (i = 0; i < s->nb_inputs; i++) {
+ if (!s->frames[i]) {
+ ret = ff_request_frame(ctx->inputs[i]);
+ if (ret < 0)
+ return ret;
+ }
+ }
+
+ out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!out)
+ return AVERROR(ENOMEM);
+ out->pts = s->frames[0]->pts;
+
+ for (i = 0; i < s->nb_inputs; i++) {
+ for (p = 0; p < s->nb_planes; p++) {
+ if (s->is_vertical) {
+ int h = (p == 1 || p == 2) ? FF_CEIL_RSHIFT(ctx->inputs[i]->h, s->desc->log2_chroma_h) : ctx->inputs[i]->h;
+ int w = (p == 1 || p == 2) ? FF_CEIL_RSHIFT(outlink->w, s->desc->log2_chroma_w) : outlink->w;
+
+ av_image_copy_plane(out->data[p] + offset[p] * out->linesize[p],
+ out->linesize[p],
+ s->frames[i]->data[p],
+ s->frames[i]->linesize[p],
+ w, h);
+ offset[p] += h;
+ } else {
+ int h = (p == 1 || p == 2) ? FF_CEIL_RSHIFT(outlink->h, s->desc->log2_chroma_h) : outlink->h;
+ int w = (p == 1 || p == 2) ? FF_CEIL_RSHIFT(ctx->inputs[i]->w, s->desc->log2_chroma_w) : ctx->inputs[i]->w;
+
+ av_image_copy_plane(out->data[p] + offset[p],
+ out->linesize[p],
+ s->frames[i]->data[p],
+ s->frames[i]->linesize[p],
+ w, h);
+ offset[p] += w;
+ }
+ }
+ }
+
+ for (i = 0; i < s->nb_inputs; i++)
+ av_frame_free(&s->frames[i]);
+
+ return ff_filter_frame(outlink, out);
+}
+
+#define OFFSET(x) offsetof(StackContext, x)
+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
+static const AVOption stack_options[] = {
+ { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
+ { NULL },
+};
+
+static const AVFilterPad outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_output,
+ .request_frame = request_frame,
+ },
+ { NULL }
+};
+
+#define hstack_options stack_options
+AVFILTER_DEFINE_CLASS(hstack);
+
+AVFilter ff_vf_hstack = {
+ .name = "hstack",
+ .description = NULL_IF_CONFIG_SMALL("Stack video inputs horizontally."),
+ .priv_size = sizeof(StackContext),
+ .priv_class = &hstack_class,
+ .query_formats = query_formats,
+ .outputs = outputs,
+ .init = init,
+ .uninit = uninit,
+ .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
+};
+
+#define vstack_options stack_options
+AVFILTER_DEFINE_CLASS(vstack);
+
+AVFilter ff_vf_vstack = {
+ .name = "vstack",
+ .description = NULL_IF_CONFIG_SMALL("Stack video inputs vertically."),
+ .priv_size = sizeof(StackContext),
+ .priv_class = &vstack_class,
+ .query_formats = query_formats,
+ .outputs = outputs,
+ .init = init,
+ .uninit = uninit,
+ .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
+};
--
1.7.11.2
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