swscale/utils: support bayer input + scaling, and bayer input + any s…

…upported output Fixes Ticket4053 Signed-off-by: Michael Niedermayer <[email protected]>
zhengxj91 · Nov 12, 2014 · 2f6bb86 · 2f6bb86
1 parent 173d51c
commit 2f6bb86
Showing 1 changed file with 25 additions and 0 deletions.
diff --git a/libswscale/utils.c b/libswscale/utils.c
@@ -1217,6 +1217,31 @@ av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
  }
  }
 
+ if (isBayer(srcFormat)) {
+ if (!unscaled ||
+ (dstFormat != AV_PIX_FMT_RGB24 && dstFormat != AV_PIX_FMT_YUV420P)) {
+ enum AVPixelFormat tmpFormat = AV_PIX_FMT_RGB24;
+
+ ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
+ srcW, srcH, tmpFormat, 64);
+ if (ret < 0)
+ return ret;
+
+ c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
+ srcW, srcH, tmpFormat,
+ flags, srcFilter, NULL, c->param);
+ if (!c->cascaded_context[0])
+ return -1;
+
+ c->cascaded_context[1] = sws_getContext(srcW, srcH, tmpFormat,
+ dstW, dstH, dstFormat,
+ flags, NULL, dstFilter, c->param);
+ if (!c->cascaded_context[1])
+ return -1;
+ return 0;
+ }
+ }
+
 #define USE_MMAP (HAVE_MMAP && HAVE_MPROTECT && defined MAP_ANONYMOUS)
 
  /* precalculate horizontal scaler filter coefficients */