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convert null vhook to libswscale 

Patch by Victor Paesa % wzrlpy A arsystel Pcom %
Original thread:
Date: Aug 23, 2006 7:28 PM
Subject: Re: [Ffmpeg-devel] [PATCH] enable libswscale

Originally committed as revision 6114 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Víctor Paesa 2006-08-28 11:57:19 +00:00 committed by Guillaume Poirier
parent 3e20143ee7
commit be484a2cc9
1 changed files with 65 additions and 8 deletions
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73
vhook/null.c
View File

@ -19,9 +19,24 @@
#include <stdio.h>
#include "framehook.h"
#include "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;
enum PixelFormat sws_pix_fmt; // Sws_Context is opaque, we need to save
int sws_width, sws_height; // this to check if we can re-use contexts
// Contexts will be re-used 99% of time,
// I know of width/height changes only in DVB broadcasts
} ContextInfo;
void Release(void *ctx)
@ -29,8 +44,11 @@ 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[])
@ -57,20 +75,59 @@ void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width,
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);
return;
// if we already got a SWS context, let's realloc if is not re-useable
if (ci->toRGB_convert_ctx != NULL) {
if ((ci->sws_pix_fmt != pix_fmt) ||
(ci->sws_width != width) || (ci->sws_height != height)) {
sws_freeContext(ci->toRGB_convert_ctx);
ci->toRGB_convert_ctx = NULL;
sws_freeContext(ci->fromRGB_convert_ctx);
ci->fromRGB_convert_ctx = NULL;
}
}
if (ci->toRGB_convert_ctx == NULL) {
ci->sws_pix_fmt = pix_fmt;
ci->sws_width = width;
ci->sws_height = height;
ci->toRGB_convert_ctx = sws_getContext(
ci->sws_width, ci->sws_height,
ci->sws_pix_fmt,
ci->sws_width, ci->sws_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");
exit(1);
}
ci->fromRGB_convert_ctx = sws_getContext(
ci->sws_width, ci->sws_height,
PIX_FMT_RGB24,
ci->sws_width, ci->sws_height,
ci->sws_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");
exit(1);
}
}
// 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, ci->sws_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) {
}
sws_scale(ci->fromRGB_convert_ctx,
picture1.data, picture1.linesize, 0, ci->sws_height,
picture->data, picture->linesize);
}
av_free(buf);