[FFmpeg-soc] [soc]: r634 - in libavfilter: Makefile allfilters.h avfilter.c vf_vflip.c
koorogi
subversion at mplayerhq.hu
Wed Aug 8 19:22:54 CEST 2007
Author: koorogi
Date: Wed Aug 8 19:22:54 2007
New Revision: 634
Log:
Add a vertical flip filter
Added:
libavfilter/vf_vflip.c
Modified:
libavfilter/Makefile
libavfilter/allfilters.h
libavfilter/avfilter.c
Modified: libavfilter/Makefile
==============================================================================
--- libavfilter/Makefile (original)
+++ libavfilter/Makefile Wed Aug 8 19:22:54 2007
@@ -14,6 +14,7 @@ OBJS-yes = vsrc_dummy.o \
vf_passthrough.o \
vf_rgb2bgr.o \
vf_slicify.o \
+ vf_vflip.o \
HEADERS = avfilter.h
Modified: libavfilter/allfilters.h
==============================================================================
--- libavfilter/allfilters.h (original)
+++ libavfilter/allfilters.h Wed Aug 8 19:22:54 2007
@@ -28,4 +28,5 @@ extern AVFilter vf_graph;
extern AVFilter vf_passthrough;
extern AVFilter vf_rgb2bgr;
extern AVFilter vf_slicify;
+extern AVFilter vf_vflip;
extern AVFilter vo_sdl;
Modified: libavfilter/avfilter.c
==============================================================================
--- libavfilter/avfilter.c (original)
+++ libavfilter/avfilter.c Wed Aug 8 19:22:54 2007
@@ -221,6 +221,7 @@ void avfilter_init(void)
avfilter_register(&vf_passthrough);
avfilter_register(&vf_rgb2bgr);
avfilter_register(&vf_slicify);
+ avfilter_register(&vf_vflip);
avfilter_register(&vo_sdl);
}
Added: libavfilter/vf_vflip.c
==============================================================================
--- (empty file)
+++ libavfilter/vf_vflip.c Wed Aug 8 19:22:54 2007
@@ -0,0 +1,125 @@
+/*
+ * Vertical flip filter
+ * copyright (c) 2007 Bobby Bingham
+ *
+ * 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 <string.h>
+#include <stdio.h>
+
+#include "avfilter.h"
+
+typedef struct
+{
+ int vsub; //< chroma subsampling
+} FlipContext;
+
+static int *query_in_formats(AVFilterLink *link)
+{
+ return avfilter_make_format_list(31,
+ PIX_FMT_YUV444P, PIX_FMT_YUV422P, PIX_FMT_YUV420P,
+ PIX_FMT_YUV411P, PIX_FMT_YUV410P,
+ PIX_FMT_YUYV422, PIX_FMT_UYVY422, PIX_FMT_UYYVYY411,
+ PIX_FMT_YUVJ444P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ420P,
+ PIX_FMT_YUV440P, PIX_FMT_YUVJ440P,
+ PIX_FMT_RGB32, PIX_FMT_BGR32,
+ PIX_FMT_RGB32_1, PIX_FMT_BGR32_1,
+ PIX_FMT_RGB24, PIX_FMT_BGR24,
+ PIX_FMT_RGB565, PIX_FMT_BGR565,
+ PIX_FMT_RGB555, PIX_FMT_BGR555,
+ PIX_FMT_RGB8, PIX_FMT_BGR8,
+ PIX_FMT_RGB4_BYTE,PIX_FMT_BGR4_BYTE,
+ PIX_FMT_GRAY16BE, PIX_FMT_GRAY16LE,
+ PIX_FMT_GRAY8, PIX_FMT_PAL8);
+}
+
+static int config_input(AVFilterLink *link)
+{
+ FlipContext *flip = link->dst->priv;
+ int tmp;
+
+ avcodec_get_chroma_sub_sample(link->format, &tmp, &flip->vsub);
+
+ return avfilter_config_link(link->dst->outputs[0]);
+}
+
+static void start_frame(AVFilterLink *link, AVFilterPicRef *picref)
+{
+ FlipContext *flip = link->dst->priv;
+ AVFilterPicRef *ref2 = avfilter_ref_pic(picref, ~0);
+ int i;
+
+ ref2->data[0] += (ref2->h-1) * ref2->linesize[0];
+ ref2->linesize[0] = -ref2->linesize[0];
+ for(i = 1; i < 4; i ++) {
+ if(ref2->data[i]) {
+ ref2->data[i] += ((ref2->h >> flip->vsub)-1) * ref2->linesize[i];
+ ref2->linesize[i] = -ref2->linesize[i];
+ }
+ }
+
+ link->cur_pic = picref;
+
+ avfilter_start_frame(link->dst->outputs[0], ref2);
+}
+
+static void end_frame(AVFilterLink *link)
+{
+ avfilter_unref_pic(link->cur_pic);
+ link->cur_pic = NULL;
+ avfilter_end_frame(link->dst->outputs[0]);
+}
+
+static void draw_slice(AVFilterLink *link, uint8_t *data[4], int y, int h)
+{
+ AVFilterContext *ctx = link->dst;
+ AVFilterPicRef *pic = link->cur_pic;
+ FlipContext *flip = ctx->priv;
+
+ uint8_t *src[4];
+ int i;
+
+ memcpy(src, data, sizeof(src));
+
+ src[0] += (y+h-1) * pic->linesize[0];
+ for(i = 0; i < 4; i ++)
+ if(src[i])
+ src[i] += (((y+h) >> flip->vsub)-1) * pic->linesize[i];
+
+ avfilter_draw_slice(ctx->outputs[0], src, pic->h - (y+h), h);
+}
+
+AVFilter vf_vflip =
+{
+ .name = "vflip",
+ .author = "Bobby Bingham",
+ .priv_size = sizeof(FlipContext),
+
+ .inputs = (AVFilterPad[]) {{ .name = "default",
+ .type = AV_PAD_VIDEO,
+ .start_frame = start_frame,
+ .draw_slice = draw_slice,
+ .end_frame = end_frame,
+ .query_formats = query_in_formats,
+ .config_props = config_input, },
+ { .name = NULL}},
+ .outputs = (AVFilterPad[]) {{ .name = "default",
+ .type = AV_PAD_VIDEO, },
+ { .name = NULL}},
+};
+
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