[FFmpeg-cvslog] lavfi: move video-related functions to a separate file.
Anton Khirnov
git at videolan.org
Wed May 16 02:30:46 CEST 2012
ffmpeg | branch: master | Anton Khirnov <anton at khirnov.net> | Thu May 10 07:36:10 2012 +0200| [c5432d3ca4af629cea713c7613d22f5c451d41ab] | committer: Anton Khirnov
lavfi: move video-related functions to a separate file.
This is easier to follow than having them randomly scattered in
avfilter.c and defaults.c.
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c5432d3ca4af629cea713c7613d22f5c451d41ab
---
libavfilter/Makefile | 1 +
libavfilter/avfilter.c | 184 ------------------------------
libavfilter/defaults.c | 87 --------------
libavfilter/video.c | 294 ++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 295 insertions(+), 271 deletions(-)
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index a90d8a0..12819cb 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -22,6 +22,7 @@ OBJS = allfilters.o \
formats.o \
graphparser.o \
vf_scale.o \
+ video.o \
OBJS-$(CONFIG_AFORMAT_FILTER) += af_aformat.o
OBJS-$(CONFIG_ANULL_FILTER) += af_anull.o
diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index 57108b1..9dacf70 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -248,35 +248,6 @@ static char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms)
}
#endif
-static void ff_dlog_ref(void *ctx, AVFilterBufferRef *ref, int end)
-{
- av_unused char buf[16];
- av_dlog(ctx,
- "ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
- ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0],
- ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
- ref->pts, ref->pos);
-
- if (ref->video) {
- av_dlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
- ref->video->pixel_aspect.num, ref->video->pixel_aspect.den,
- ref->video->w, ref->video->h,
- !ref->video->interlaced ? 'P' : /* Progressive */
- ref->video->top_field_first ? 'T' : 'B', /* Top / Bottom */
- ref->video->key_frame,
- av_get_picture_type_char(ref->video->pict_type));
- }
- if (ref->audio) {
- av_dlog(ctx, " cl:%"PRId64"d n:%d r:%d p:%d",
- ref->audio->channel_layout,
- ref->audio->nb_samples,
- ref->audio->sample_rate,
- ref->audio->planar);
- }
-
- av_dlog(ctx, "]%s", end ? "\n" : "");
-}
-
void ff_dlog_link(void *ctx, AVFilterLink *link, int end)
{
if (link->type == AVMEDIA_TYPE_VIDEO) {
@@ -301,71 +272,6 @@ void ff_dlog_link(void *ctx, AVFilterLink *link, int end)
}
}
-AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
-{
- AVFilterBufferRef *ret = NULL;
-
- av_unused char buf[16];
- FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0);
- av_dlog(NULL, " perms:%s w:%d h:%d\n", ff_get_ref_perms_string(buf, sizeof(buf), perms), w, h);
-
- if (link->dstpad->get_video_buffer)
- ret = link->dstpad->get_video_buffer(link, perms, w, h);
-
- if (!ret)
- ret = avfilter_default_get_video_buffer(link, perms, w, h);
-
- if (ret)
- ret->type = AVMEDIA_TYPE_VIDEO;
-
- FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " returning "); ff_dlog_ref(NULL, ret, 1);
-
- return ret;
-}
-
-AVFilterBufferRef *
-avfilter_get_video_buffer_ref_from_arrays(uint8_t *data[4], int linesize[4], int perms,
- int w, int h, enum PixelFormat format)
-{
- AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
- AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));
-
- if (!pic || !picref)
- goto fail;
-
- picref->buf = pic;
- picref->buf->free = ff_avfilter_default_free_buffer;
- if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))
- goto fail;
-
- pic->w = picref->video->w = w;
- pic->h = picref->video->h = h;
-
- /* make sure the buffer gets read permission or it's useless for output */
- picref->perms = perms | AV_PERM_READ;
-
- pic->refcount = 1;
- picref->type = AVMEDIA_TYPE_VIDEO;
- pic->format = picref->format = format;
-
- memcpy(pic->data, data, 4*sizeof(data[0]));
- memcpy(pic->linesize, linesize, 4*sizeof(linesize[0]));
- memcpy(picref->data, pic->data, sizeof(picref->data));
- memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
-
- pic-> extended_data = pic->data;
- picref->extended_data = picref->data;
-
- return picref;
-
-fail:
- if (picref && picref->video)
- av_free(picref->video);
- av_free(picref);
- av_free(pic);
- return NULL;
-}
-
int avfilter_request_frame(AVFilterLink *link)
{
FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1);
@@ -395,96 +301,6 @@ int avfilter_poll_frame(AVFilterLink *link)
return min;
}
-/* XXX: should we do the duplicating of the picture ref here, instead of
- * forcing the source filter to do it? */
-void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
-{
- void (*start_frame)(AVFilterLink *, AVFilterBufferRef *);
- AVFilterPad *dst = link->dstpad;
- int perms = picref->perms;
-
- FF_DPRINTF_START(NULL, start_frame); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " "); ff_dlog_ref(NULL, picref, 1);
-
- if (!(start_frame = dst->start_frame))
- start_frame = avfilter_default_start_frame;
-
- if (picref->linesize[0] < 0)
- perms |= AV_PERM_NEG_LINESIZES;
- /* prepare to copy the picture if it has insufficient permissions */
- if ((dst->min_perms & perms) != dst->min_perms || dst->rej_perms & perms) {
- av_log(link->dst, AV_LOG_DEBUG,
- "frame copy needed (have perms %x, need %x, reject %x)\n",
- picref->perms,
- link->dstpad->min_perms, link->dstpad->rej_perms);
-
- link->cur_buf = avfilter_get_video_buffer(link, dst->min_perms, link->w, link->h);
- link->src_buf = picref;
- avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf);
- }
- else
- link->cur_buf = picref;
-
- start_frame(link, link->cur_buf);
-}
-
-void avfilter_end_frame(AVFilterLink *link)
-{
- void (*end_frame)(AVFilterLink *);
-
- if (!(end_frame = link->dstpad->end_frame))
- end_frame = avfilter_default_end_frame;
-
- end_frame(link);
-
- /* unreference the source picture if we're feeding the destination filter
- * a copied version dues to permission issues */
- if (link->src_buf) {
- avfilter_unref_buffer(link->src_buf);
- link->src_buf = NULL;
- }
-}
-
-void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
-{
- uint8_t *src[4], *dst[4];
- int i, j, vsub;
- void (*draw_slice)(AVFilterLink *, int, int, int);
-
- FF_DPRINTF_START(NULL, draw_slice); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " y:%d h:%d dir:%d\n", y, h, slice_dir);
-
- /* copy the slice if needed for permission reasons */
- if (link->src_buf) {
- vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
-
- for (i = 0; i < 4; i++) {
- if (link->src_buf->data[i]) {
- src[i] = link->src_buf-> data[i] +
- (y >> (i==1 || i==2 ? vsub : 0)) * link->src_buf-> linesize[i];
- dst[i] = link->cur_buf->data[i] +
- (y >> (i==1 || i==2 ? vsub : 0)) * link->cur_buf->linesize[i];
- } else
- src[i] = dst[i] = NULL;
- }
-
- for (i = 0; i < 4; i++) {
- int planew =
- av_image_get_linesize(link->format, link->cur_buf->video->w, i);
-
- if (!src[i]) continue;
-
- for (j = 0; j < h >> (i==1 || i==2 ? vsub : 0); j++) {
- memcpy(dst[i], src[i], planew);
- src[i] += link->src_buf->linesize[i];
- dst[i] += link->cur_buf->linesize[i];
- }
- }
- }
-
- if (!(draw_slice = link->dstpad->draw_slice))
- draw_slice = avfilter_default_draw_slice;
- draw_slice(link, y, h, slice_dir);
-}
-
#define MAX_REGISTERED_AVFILTERS_NB 64
static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
diff --git a/libavfilter/defaults.c b/libavfilter/defaults.c
index cb7bf1c..9829cdc 100644
--- a/libavfilter/defaults.c
+++ b/libavfilter/defaults.c
@@ -36,73 +36,6 @@ void ff_avfilter_default_free_buffer(AVFilterBuffer *ptr)
av_free(ptr);
}
-/* TODO: set the buffer's priv member to a context structure for the whole
- * filter chain. This will allow for a buffer pool instead of the constant
- * alloc & free cycle currently implemented. */
-AVFilterBufferRef *avfilter_default_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
-{
- int linesize[4];
- uint8_t *data[4];
- AVFilterBufferRef *picref = NULL;
-
- // +2 is needed for swscaler, +16 to be SIMD-friendly
- if (av_image_alloc(data, linesize, w, h, link->format, 16) < 0)
- return NULL;
-
- picref = avfilter_get_video_buffer_ref_from_arrays(data, linesize,
- perms, w, h, link->format);
- if (!picref) {
- av_free(data[0]);
- return NULL;
- }
-
- return picref;
-}
-
-void avfilter_default_start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
-{
- AVFilterLink *outlink = NULL;
-
- if (inlink->dst->output_count)
- outlink = inlink->dst->outputs[0];
-
- if (outlink) {
- outlink->out_buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
- avfilter_copy_buffer_ref_props(outlink->out_buf, picref);
- avfilter_start_frame(outlink, avfilter_ref_buffer(outlink->out_buf, ~0));
- }
-}
-
-void avfilter_default_draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
-{
- AVFilterLink *outlink = NULL;
-
- if (inlink->dst->output_count)
- outlink = inlink->dst->outputs[0];
-
- if (outlink)
- avfilter_draw_slice(outlink, y, h, slice_dir);
-}
-
-void avfilter_default_end_frame(AVFilterLink *inlink)
-{
- AVFilterLink *outlink = NULL;
-
- if (inlink->dst->output_count)
- outlink = inlink->dst->outputs[0];
-
- avfilter_unref_buffer(inlink->cur_buf);
- inlink->cur_buf = NULL;
-
- if (outlink) {
- if (outlink->out_buf) {
- avfilter_unref_buffer(outlink->out_buf);
- outlink->out_buf = NULL;
- }
- avfilter_end_frame(outlink);
- }
-}
-
/**
* default config_link() implementation for output video links to simplify
* the implementation of one input one output video filters */
@@ -186,23 +119,3 @@ int avfilter_default_query_formats(AVFilterContext *ctx)
return 0;
}
-
-void avfilter_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
-{
- avfilter_start_frame(link->dst->outputs[0], picref);
-}
-
-void avfilter_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
-{
- avfilter_draw_slice(link->dst->outputs[0], y, h, slice_dir);
-}
-
-void avfilter_null_end_frame(AVFilterLink *link)
-{
- avfilter_end_frame(link->dst->outputs[0]);
-}
-
-AVFilterBufferRef *avfilter_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
-{
- return avfilter_get_video_buffer(link->dst->outputs[0], perms, w, h);
-}
diff --git a/libavfilter/video.c b/libavfilter/video.c
new file mode 100644
index 0000000..26805fe
--- /dev/null
+++ b/libavfilter/video.c
@@ -0,0 +1,294 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/imgutils.h"
+
+#include "avfilter.h"
+#include "internal.h"
+
+static void ff_dlog_ref(void *ctx, AVFilterBufferRef *ref, int end)
+{
+ av_unused char buf[16];
+ av_dlog(ctx,
+ "ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
+ ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0],
+ ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
+ ref->pts, ref->pos);
+
+ if (ref->video) {
+ av_dlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
+ ref->video->pixel_aspect.num, ref->video->pixel_aspect.den,
+ ref->video->w, ref->video->h,
+ !ref->video->interlaced ? 'P' : /* Progressive */
+ ref->video->top_field_first ? 'T' : 'B', /* Top / Bottom */
+ ref->video->key_frame,
+ av_get_picture_type_char(ref->video->pict_type));
+ }
+ if (ref->audio) {
+ av_dlog(ctx, " cl:%"PRId64"d n:%d r:%d p:%d",
+ ref->audio->channel_layout,
+ ref->audio->nb_samples,
+ ref->audio->sample_rate,
+ ref->audio->planar);
+ }
+
+ av_dlog(ctx, "]%s", end ? "\n" : "");
+}
+
+AVFilterBufferRef *avfilter_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
+{
+ return avfilter_get_video_buffer(link->dst->outputs[0], perms, w, h);
+}
+
+/* TODO: set the buffer's priv member to a context structure for the whole
+ * filter chain. This will allow for a buffer pool instead of the constant
+ * alloc & free cycle currently implemented. */
+AVFilterBufferRef *avfilter_default_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
+{
+ int linesize[4];
+ uint8_t *data[4];
+ AVFilterBufferRef *picref = NULL;
+
+ // +2 is needed for swscaler, +16 to be SIMD-friendly
+ if (av_image_alloc(data, linesize, w, h, link->format, 16) < 0)
+ return NULL;
+
+ picref = avfilter_get_video_buffer_ref_from_arrays(data, linesize,
+ perms, w, h, link->format);
+ if (!picref) {
+ av_free(data[0]);
+ return NULL;
+ }
+
+ return picref;
+}
+
+AVFilterBufferRef *
+avfilter_get_video_buffer_ref_from_arrays(uint8_t *data[4], int linesize[4], int perms,
+ int w, int h, enum PixelFormat format)
+{
+ AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
+ AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));
+
+ if (!pic || !picref)
+ goto fail;
+
+ picref->buf = pic;
+ picref->buf->free = ff_avfilter_default_free_buffer;
+ if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))
+ goto fail;
+
+ pic->w = picref->video->w = w;
+ pic->h = picref->video->h = h;
+
+ /* make sure the buffer gets read permission or it's useless for output */
+ picref->perms = perms | AV_PERM_READ;
+
+ pic->refcount = 1;
+ picref->type = AVMEDIA_TYPE_VIDEO;
+ pic->format = picref->format = format;
+
+ memcpy(pic->data, data, 4*sizeof(data[0]));
+ memcpy(pic->linesize, linesize, 4*sizeof(linesize[0]));
+ memcpy(picref->data, pic->data, sizeof(picref->data));
+ memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
+
+ pic-> extended_data = pic->data;
+ picref->extended_data = picref->data;
+
+ return picref;
+
+fail:
+ if (picref && picref->video)
+ av_free(picref->video);
+ av_free(picref);
+ av_free(pic);
+ return NULL;
+}
+
+AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
+{
+ AVFilterBufferRef *ret = NULL;
+
+ av_unused char buf[16];
+ FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0);
+ av_dlog(NULL, " perms:%s w:%d h:%d\n", ff_get_ref_perms_string(buf, sizeof(buf), perms), w, h);
+
+ if (link->dstpad->get_video_buffer)
+ ret = link->dstpad->get_video_buffer(link, perms, w, h);
+
+ if (!ret)
+ ret = avfilter_default_get_video_buffer(link, perms, w, h);
+
+ if (ret)
+ ret->type = AVMEDIA_TYPE_VIDEO;
+
+ FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " returning "); ff_dlog_ref(NULL, ret, 1);
+
+ return ret;
+}
+
+void avfilter_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
+{
+ avfilter_start_frame(link->dst->outputs[0], picref);
+}
+
+void avfilter_default_start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
+{
+ AVFilterLink *outlink = NULL;
+
+ if (inlink->dst->output_count)
+ outlink = inlink->dst->outputs[0];
+
+ if (outlink) {
+ outlink->out_buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
+ avfilter_copy_buffer_ref_props(outlink->out_buf, picref);
+ avfilter_start_frame(outlink, avfilter_ref_buffer(outlink->out_buf, ~0));
+ }
+}
+
+/* XXX: should we do the duplicating of the picture ref here, instead of
+ * forcing the source filter to do it? */
+void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
+{
+ void (*start_frame)(AVFilterLink *, AVFilterBufferRef *);
+ AVFilterPad *dst = link->dstpad;
+ int perms = picref->perms;
+
+ FF_DPRINTF_START(NULL, start_frame); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " "); ff_dlog_ref(NULL, picref, 1);
+
+ if (!(start_frame = dst->start_frame))
+ start_frame = avfilter_default_start_frame;
+
+ if (picref->linesize[0] < 0)
+ perms |= AV_PERM_NEG_LINESIZES;
+ /* prepare to copy the picture if it has insufficient permissions */
+ if ((dst->min_perms & perms) != dst->min_perms || dst->rej_perms & perms) {
+ av_log(link->dst, AV_LOG_DEBUG,
+ "frame copy needed (have perms %x, need %x, reject %x)\n",
+ picref->perms,
+ link->dstpad->min_perms, link->dstpad->rej_perms);
+
+ link->cur_buf = avfilter_get_video_buffer(link, dst->min_perms, link->w, link->h);
+ link->src_buf = picref;
+ avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf);
+ }
+ else
+ link->cur_buf = picref;
+
+ start_frame(link, link->cur_buf);
+}
+
+void avfilter_null_end_frame(AVFilterLink *link)
+{
+ avfilter_end_frame(link->dst->outputs[0]);
+}
+
+void avfilter_default_end_frame(AVFilterLink *inlink)
+{
+ AVFilterLink *outlink = NULL;
+
+ if (inlink->dst->output_count)
+ outlink = inlink->dst->outputs[0];
+
+ avfilter_unref_buffer(inlink->cur_buf);
+ inlink->cur_buf = NULL;
+
+ if (outlink) {
+ if (outlink->out_buf) {
+ avfilter_unref_buffer(outlink->out_buf);
+ outlink->out_buf = NULL;
+ }
+ avfilter_end_frame(outlink);
+ }
+}
+
+void avfilter_end_frame(AVFilterLink *link)
+{
+ void (*end_frame)(AVFilterLink *);
+
+ if (!(end_frame = link->dstpad->end_frame))
+ end_frame = avfilter_default_end_frame;
+
+ end_frame(link);
+
+ /* unreference the source picture if we're feeding the destination filter
+ * a copied version dues to permission issues */
+ if (link->src_buf) {
+ avfilter_unref_buffer(link->src_buf);
+ link->src_buf = NULL;
+ }
+}
+
+void avfilter_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
+{
+ avfilter_draw_slice(link->dst->outputs[0], y, h, slice_dir);
+}
+
+void avfilter_default_draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
+{
+ AVFilterLink *outlink = NULL;
+
+ if (inlink->dst->output_count)
+ outlink = inlink->dst->outputs[0];
+
+ if (outlink)
+ avfilter_draw_slice(outlink, y, h, slice_dir);
+}
+
+void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
+{
+ uint8_t *src[4], *dst[4];
+ int i, j, vsub;
+ void (*draw_slice)(AVFilterLink *, int, int, int);
+
+ FF_DPRINTF_START(NULL, draw_slice); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " y:%d h:%d dir:%d\n", y, h, slice_dir);
+
+ /* copy the slice if needed for permission reasons */
+ if (link->src_buf) {
+ vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
+
+ for (i = 0; i < 4; i++) {
+ if (link->src_buf->data[i]) {
+ src[i] = link->src_buf-> data[i] +
+ (y >> (i==1 || i==2 ? vsub : 0)) * link->src_buf-> linesize[i];
+ dst[i] = link->cur_buf->data[i] +
+ (y >> (i==1 || i==2 ? vsub : 0)) * link->cur_buf->linesize[i];
+ } else
+ src[i] = dst[i] = NULL;
+ }
+
+ for (i = 0; i < 4; i++) {
+ int planew =
+ av_image_get_linesize(link->format, link->cur_buf->video->w, i);
+
+ if (!src[i]) continue;
+
+ for (j = 0; j < h >> (i==1 || i==2 ? vsub : 0); j++) {
+ memcpy(dst[i], src[i], planew);
+ src[i] += link->src_buf->linesize[i];
+ dst[i] += link->cur_buf->linesize[i];
+ }
+ }
+ }
+
+ if (!(draw_slice = link->dstpad->draw_slice))
+ draw_slice = avfilter_default_draw_slice;
+ draw_slice(link, y, h, slice_dir);
+}
+
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