* Null Video Hook
* Copyright (c) 2002 Philip Gladstone
*
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
-#include "framehook.h"
+#include "libavformat/framehook.h"
+#include "libswscale/swscale.h"
+
+static int sws_flags = SWS_BICUBIC;
typedef struct {
int dummy;
+
+ // This vhook first converts frame to RGB ...
+ struct SwsContext *toRGB_convert_ctx;
+
+ // ... and later converts back frame from RGB to initial format
+ struct SwsContext *fromRGB_convert_ctx;
+
} ContextInfo;
void Release(void *ctx)
ContextInfo *ci;
ci = (ContextInfo *) ctx;
- if (ctx)
+ if (ctx) {
+ sws_freeContext(ci->toRGB_convert_ctx);
+ sws_freeContext(ci->fromRGB_convert_ctx);
av_free(ctx);
+ }
}
int Configure(void **ctxp, int argc, char *argv[])
buf = av_malloc(size);
avpicture_fill(&picture1, buf, PIX_FMT_RGB24, width, height);
- if (img_convert(&picture1, PIX_FMT_RGB24,
- picture, pix_fmt, width, height) < 0) {
- av_free(buf);
+
+ // if we already got a SWS context, let's realloc if is not re-useable
+ ci->toRGB_convert_ctx = sws_getCachedContext(ci->toRGB_convert_ctx,
+ width, height, pix_fmt,
+ width, height, PIX_FMT_RGB24,
+ sws_flags, NULL, NULL, NULL);
+ if (ci->toRGB_convert_ctx == NULL) {
+ av_log(NULL, AV_LOG_ERROR,
+ "Cannot initialize the toRGB conversion context\n");
return;
}
+// img_convert parameters are 2 first destination, then 4 source
+// sws_scale parameters are context, 4 first source, then 2 destination
+ sws_scale(ci->toRGB_convert_ctx,
+ picture->data, picture->linesize, 0, height,
+ picture1.data, picture1.linesize);
+
pict = &picture1;
}
/* Insert filter code here */
if (pix_fmt != PIX_FMT_RGB24) {
- if (img_convert(picture, pix_fmt,
- &picture1, PIX_FMT_RGB24, width, height) < 0) {
+ ci->fromRGB_convert_ctx = sws_getCachedContext(ci->fromRGB_convert_ctx,
+ width, height, PIX_FMT_RGB24,
+ width, height, pix_fmt,
+ sws_flags, NULL, NULL, NULL);
+ if (ci->fromRGB_convert_ctx == NULL) {
+ av_log(NULL, AV_LOG_ERROR,
+ "Cannot initialize the fromRGB conversion context\n");
+ return;
}
+// img_convert parameters are 2 first destination, then 4 source
+// sws_scale parameters are context, 4 first source, then 2 destination
+ sws_scale(ci->fromRGB_convert_ctx,
+ picture1.data, picture1.linesize, 0, height,
+ picture->data, picture->linesize);
}
av_free(buf);