From a5f6dad7abb279ba1d57c1b7ee68c61b7381199c Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Mon, 28 Nov 2016 17:28:59 +0100
Subject: [PATCH] avfilter: add premultiply filter
Signed-off-by: Paul B Mahol <onemda@gmail.com>
---
doc/filters.texi | 5 +
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_premultiply.c | 403 +++++++++++++++++++++++++++++++++++++++++++
4 files changed, 410 insertions(+)
create mode 100644 libavfilter/vf_premultiply.c
@@ -10982,6 +10982,11 @@ Set medium thresholding (good results, default).
@end table
@end table
+@section premultiply
+Apply premultiply effect to input video stream using first plane of second stream.
+
+Both streams must have same dimensions and same pixel format.
+
@section prewitt
Apply prewitt operator to input video stream.
@@ -240,6 +240,7 @@ OBJS-$(CONFIG_PHASE_FILTER) += vf_phase.o
OBJS-$(CONFIG_PIXDESCTEST_FILTER) += vf_pixdesctest.o
OBJS-$(CONFIG_PP_FILTER) += vf_pp.o
OBJS-$(CONFIG_PP7_FILTER) += vf_pp7.o
+OBJS-$(CONFIG_PREMULTIPLY_FILTER) += vf_premultiply.o framesync.o
OBJS-$(CONFIG_PREWITT_FILTER) += vf_convolution.o
OBJS-$(CONFIG_PSNR_FILTER) += vf_psnr.o dualinput.o framesync.o
OBJS-$(CONFIG_PULLUP_FILTER) += vf_pullup.o
@@ -256,6 +256,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(PIXDESCTEST, pixdesctest, vf);
REGISTER_FILTER(PP, pp, vf);
REGISTER_FILTER(PP7, pp7, vf);
+ REGISTER_FILTER(PREMULTIPLY, premultiply, vf);
REGISTER_FILTER(PREWITT, prewitt, vf);
REGISTER_FILTER(PSNR, psnr, vf);
REGISTER_FILTER(PULLUP, pullup, vf);
new file mode 100644
@@ -0,0 +1,403 @@
+/*
+ * Copyright (c) 2016 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/imgutils.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/opt.h"
+#include "avfilter.h"
+#include "formats.h"
+#include "framesync.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct PreMultiplyContext {
+ const AVClass *class;
+ int width[4], height[4];
+ int nb_planes;
+ int planes;
+ int half, depth, offset;
+ FFFrameSync fs;
+
+ void (*premultiply[4])(const uint8_t *msrc, const uint8_t *asrc,
+ uint8_t *dst,
+ ptrdiff_t mlinesize, ptrdiff_t alinesize,
+ ptrdiff_t dlinesize,
+ int w, int h,
+ int half, int shift, int offset);
+} PreMultiplyContext;
+
+#define OFFSET(x) offsetof(PreMultiplyContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+
+static const AVOption premultiply_options[] = {
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(premultiply);
+
+static int query_formats(AVFilterContext *ctx)
+{
+ static const enum AVPixelFormat pix_fmts[] = {
+ AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P,
+ AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV444P10,
+ AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV444P14,
+ AV_PIX_FMT_YUV444P16,
+ AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
+ AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
+ AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16,
+ AV_PIX_FMT_NONE
+ };
+
+ return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
+}
+
+static int process_frame(FFFrameSync *fs)
+{
+ AVFilterContext *ctx = fs->parent;
+ PreMultiplyContext *s = fs->opaque;
+ AVFilterLink *outlink = ctx->outputs[0];
+ AVFrame *out, *base, *alpha;
+ int ret;
+
+ if ((ret = ff_framesync_get_frame(&s->fs, 0, &base, 0)) < 0 ||
+ (ret = ff_framesync_get_frame(&s->fs, 1, &alpha, 0)) < 0)
+ return ret;
+
+ if (ctx->is_disabled) {
+ out = av_frame_clone(base);
+ if (!out)
+ return AVERROR(ENOMEM);
+ } else {
+ int p;
+
+ out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!out)
+ return AVERROR(ENOMEM);
+ av_frame_copy_props(out, base);
+
+ for (p = 0; p < s->nb_planes; p++) {
+ s->premultiply[p](base->data[p], alpha->data[0],
+ out->data[p],
+ base->linesize[p], alpha->linesize[0],
+ out->linesize[p],
+ s->width[p], s->height[p],
+ s->half, s->depth, s->offset);
+ }
+ }
+ out->pts = av_rescale_q(base->pts, s->fs.time_base, outlink->time_base);
+
+ return ff_filter_frame(outlink, out);
+}
+
+static void premultiply8(const uint8_t *msrc, const uint8_t *asrc,
+ uint8_t *dst,
+ ptrdiff_t mlinesize, ptrdiff_t alinesize,
+ ptrdiff_t dlinesize,
+ int w, int h,
+ int half, int shift, int offset)
+{
+ int x, y;
+
+ for (y = 0; y < h; y++) {
+ for (x = 0; x < w; x++) {
+ dst[x] = ((msrc[x] * (((asrc[x] >> 1) & 1) + asrc[x])) + 128) >> 8;
+ }
+
+ dst += dlinesize;
+ msrc += mlinesize;
+ asrc += alinesize;
+ }
+}
+
+static void premultiply8yuv(const uint8_t *msrc, const uint8_t *asrc,
+ uint8_t *dst,
+ ptrdiff_t mlinesize, ptrdiff_t alinesize,
+ ptrdiff_t dlinesize,
+ int w, int h,
+ int half, int shift, int offset)
+{
+ int x, y;
+
+ for (y = 0; y < h; y++) {
+ for (x = 0; x < w; x++) {
+ dst[x] = ((((msrc[x] - 128) * (((asrc[x] >> 1) & 1) + asrc[x]))) >> 8) + 128;;
+ }
+
+ dst += dlinesize;
+ msrc += mlinesize;
+ asrc += alinesize;
+ }
+}
+
+static void premultiply8offset(const uint8_t *msrc, const uint8_t *asrc,
+ uint8_t *dst,
+ ptrdiff_t mlinesize, ptrdiff_t alinesize,
+ ptrdiff_t dlinesize,
+ int w, int h,
+ int half, int shift, int offset)
+{
+ int x, y;
+
+ for (y = 0; y < h; y++) {
+ for (x = 0; x < w; x++) {
+ dst[x] = ((((msrc[x] - offset) * (((asrc[x] >> 1) & 1) + asrc[x])) + 128) >> 8) + offset;
+ }
+
+ dst += dlinesize;
+ msrc += mlinesize;
+ asrc += alinesize;
+ }
+}
+
+static void premultiply16(const uint8_t *mmsrc, const uint8_t *aasrc,
+ uint8_t *ddst,
+ ptrdiff_t mlinesize, ptrdiff_t alinesize,
+ ptrdiff_t dlinesize,
+ int w, int h,
+ int half, int shift, int offset)
+{
+ const uint16_t *msrc = (const uint16_t *)mmsrc;
+ const uint16_t *asrc = (const uint16_t *)aasrc;
+ uint16_t *dst = (uint16_t *)ddst;
+ int x, y;
+
+ for (y = 0; y < h; y++) {
+ for (x = 0; x < w; x++) {
+ dst[x] = ((msrc[x] * (((asrc[x] >> 1) & 1) + asrc[x])) + half) >> shift;
+ }
+
+ dst += dlinesize / 2;
+ msrc += mlinesize / 2;
+ asrc += alinesize / 2;
+ }
+}
+
+static void premultiply16yuv(const uint8_t *mmsrc, const uint8_t *aasrc,
+ uint8_t *ddst,
+ ptrdiff_t mlinesize, ptrdiff_t alinesize,
+ ptrdiff_t dlinesize,
+ int w, int h,
+ int half, int shift, int offset)
+{
+ const uint16_t *msrc = (const uint16_t *)mmsrc;
+ const uint16_t *asrc = (const uint16_t *)aasrc;
+ uint16_t *dst = (uint16_t *)ddst;
+ int x, y;
+
+ for (y = 0; y < h; y++) {
+ for (x = 0; x < w; x++) {
+ dst[x] = ((((msrc[x] - half) * (((asrc[x] >> 1) & 1) + asrc[x]))) >> shift) + half;;
+ }
+
+ dst += dlinesize / 2;
+ msrc += mlinesize / 2;
+ asrc += alinesize / 2;
+ }
+}
+
+static void premultiply16offset(const uint8_t *mmsrc, const uint8_t *aasrc,
+ uint8_t *ddst,
+ ptrdiff_t mlinesize, ptrdiff_t alinesize,
+ ptrdiff_t dlinesize,
+ int w, int h,
+ int half, int shift, int offset)
+{
+ const uint16_t *msrc = (const uint16_t *)mmsrc;
+ const uint16_t *asrc = (const uint16_t *)aasrc;
+ uint16_t *dst = (uint16_t *)ddst;
+ int x, y;
+
+ for (y = 0; y < h; y++) {
+ for (x = 0; x < w; x++) {
+ dst[x] = ((((msrc[x] - offset) * (((asrc[x] >> 1) & 1) + asrc[x])) + half) >> shift) + offset;
+ }
+
+ dst += dlinesize / 2;
+ msrc += mlinesize / 2;
+ asrc += alinesize / 2;
+ }
+}
+
+static int config_input(AVFilterLink *inlink)
+{
+ AVFilterContext *ctx = inlink->dst;
+ PreMultiplyContext *s = ctx->priv;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+ int vsub, hsub;
+
+ s->nb_planes = av_pix_fmt_count_planes(inlink->format);
+
+ hsub = desc->log2_chroma_w;
+ vsub = desc->log2_chroma_h;
+ s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
+ s->height[0] = s->height[3] = inlink->h;
+ s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
+ s->width[0] = s->width[3] = inlink->w;
+
+ s->depth = desc->comp[0].depth;
+ s->half = (1 << s->depth) / 2;
+ s->offset = 16 << (s->depth - 8);
+
+ switch (inlink->format) {
+ case AV_PIX_FMT_YUV444P:
+ s->premultiply[0] = premultiply8offset;
+ s->premultiply[1] = premultiply8yuv;
+ s->premultiply[2] = premultiply8yuv;
+ break;
+ case AV_PIX_FMT_YUVJ444P:
+ s->premultiply[0] = premultiply8;
+ s->premultiply[1] = premultiply8yuv;
+ s->premultiply[2] = premultiply8yuv;
+ break;
+ case AV_PIX_FMT_GBRP:
+ s->premultiply[0] = premultiply8;
+ s->premultiply[1] = premultiply8;
+ s->premultiply[2] = premultiply8;
+ break;
+ case AV_PIX_FMT_YUV444P9:
+ case AV_PIX_FMT_YUV444P10:
+ case AV_PIX_FMT_YUV444P12:
+ case AV_PIX_FMT_YUV444P14:
+ case AV_PIX_FMT_YUV444P16:
+ s->premultiply[0] = premultiply16offset;
+ s->premultiply[1] = premultiply16yuv;
+ s->premultiply[2] = premultiply16yuv;
+ break;
+ case AV_PIX_FMT_GBRP9:
+ case AV_PIX_FMT_GBRP10:
+ case AV_PIX_FMT_GBRP12:
+ case AV_PIX_FMT_GBRP14:
+ case AV_PIX_FMT_GBRP16:
+ s->premultiply[0] = premultiply16;
+ s->premultiply[1] = premultiply16;
+ s->premultiply[2] = premultiply16;
+ break;
+ case AV_PIX_FMT_GRAY8:
+ s->premultiply[0] = premultiply8;
+ break;
+ case AV_PIX_FMT_GRAY16:
+ s->premultiply[0] = premultiply16;
+ break;
+ }
+ return 0;
+}
+
+static int config_output(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ PreMultiplyContext *s = ctx->priv;
+ AVFilterLink *base = ctx->inputs[0];
+ AVFilterLink *alpha = ctx->inputs[1];
+ FFFrameSyncIn *in;
+ int ret;
+
+ if (base->format != alpha->format) {
+ av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
+ return AVERROR(EINVAL);
+ }
+ if (base->w != alpha->w ||
+ base->h != alpha->h) {
+ av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
+ "(size %dx%d) do not match the corresponding "
+ "second input link %s parameters (%dx%d) ",
+ ctx->input_pads[0].name, base->w, base->h,
+ ctx->input_pads[1].name, alpha->w, alpha->h);
+ return AVERROR(EINVAL);
+ }
+
+ outlink->w = base->w;
+ outlink->h = base->h;
+ outlink->time_base = base->time_base;
+ outlink->sample_aspect_ratio = base->sample_aspect_ratio;
+ outlink->frame_rate = base->frame_rate;
+
+ if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
+ return ret;
+
+ in = s->fs.in;
+ in[0].time_base = base->time_base;
+ in[1].time_base = alpha->time_base;
+ in[0].sync = 1;
+ in[0].before = EXT_STOP;
+ in[0].after = EXT_INFINITY;
+ in[1].sync = 1;
+ in[1].before = EXT_STOP;
+ in[1].after = EXT_INFINITY;
+ s->fs.opaque = s;
+ s->fs.on_event = process_frame;
+
+ return ff_framesync_configure(&s->fs);
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
+{
+ PreMultiplyContext *s = inlink->dst->priv;
+ return ff_framesync_filter_frame(&s->fs, inlink, buf);
+}
+
+static int request_frame(AVFilterLink *outlink)
+{
+ PreMultiplyContext *s = outlink->src->priv;
+ return ff_framesync_request_frame(&s->fs, outlink);
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ PreMultiplyContext *s = ctx->priv;
+
+ ff_framesync_uninit(&s->fs);
+}
+
+static const AVFilterPad premultiply_inputs[] = {
+ {
+ .name = "main",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ .config_props = config_input,
+ },
+ {
+ .name = "alpha",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad premultiply_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_output,
+ .request_frame = request_frame,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_premultiply = {
+ .name = "premultiply",
+ .description = NULL_IF_CONFIG_SMALL("PreMultiply first stream with first plane of second stream."),
+ .priv_size = sizeof(PreMultiplyContext),
+ .uninit = uninit,
+ .query_formats = query_formats,
+ .inputs = premultiply_inputs,
+ .outputs = premultiply_outputs,
+ .priv_class = &premultiply_class,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
+};
--
2.5.0