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simplifies null vhook by using sws_getCachedContext()

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Patch by Victor Paesa %wzrlpy A arsystel P com%
Original thread:
Date: Sep 15, 2006 6:21 PM
Subject: Re: [Ffmpeg-devel] [PATCH] enable libswscale

Originally committed as revision 6651 to svn://svn.ffmpeg.org/ffmpeg/trunk
pull/126/head
Víctor Paesa 19 years ago committed by Guillaume Poirier
parent df117196d3
commit a8824a790f
1 changed files with 20 additions and 41 deletions
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  1. 61
      vhook/null.c

61
vhook/null.c
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@ -34,11 +34,6 @@ typedef struct {
// ... 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)
@ -79,46 +74,19 @@ void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width,
avpicture_fill(&picture1, buf, PIX_FMT_RGB24, width, height);
// 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;
}
}
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) {
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);
}
av_log(NULL, AV_LOG_ERROR,
"Cannot initialize the toRGB 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,
picture->data, picture->linesize, 0, height,
picture1.data, picture1.linesize);
pict = &picture1;
@ -127,8 +95,19 @@ void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width,
/* Insert filter code here */
if (pix_fmt != PIX_FMT_RGB24) {
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");
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->fromRGB_convert_ctx,
picture1.data, picture1.linesize, 0, ci->sws_height,
picture1.data, picture1.linesize, 0, height,
picture->data, picture->linesize);
}

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