From 6de58b49032a206985602effec91e5e46c886ea2 Mon Sep 17 00:00:00 2001
From: Pedro Arthur <bygrandao@gmail.com>
Date: Mon, 28 Mar 2016 13:25:18 -0300
Subject: swscale: cleanup unused code

Removed previous swscale code under '#ifndef NEW_FILTER'
and removed unused fields of SwsContext
---
 libswscale/utils.c | 78 ++----------------------------------------------------
 1 file changed, 2 insertions(+), 76 deletions(-)

(limited to 'libswscale/utils.c')

diff --git a/libswscale/utils.c b/libswscale/utils.c
index 1891c22d83..2507195e45 100644
--- a/libswscale/utils.c
+++ b/libswscale/utils.c
@@ -1696,69 +1696,14 @@ av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
 #endif
     }
 
-    // calculate buffer sizes so that they won't run out while handling these damn slices
-    c->vLumBufSize = c->vLumFilterSize;
-    c->vChrBufSize = c->vChrFilterSize;
-    for (i = 0; i < dstH; i++) {
-        int chrI      = (int64_t)i * c->chrDstH / dstH;
-        int nextSlice = FFMAX(c->vLumFilterPos[i] + c->vLumFilterSize - 1,
-                              ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)
-                               << c->chrSrcVSubSample));
-
-        nextSlice >>= c->chrSrcVSubSample;
-        nextSlice <<= c->chrSrcVSubSample;
-        if (c->vLumFilterPos[i] + c->vLumBufSize < nextSlice)
-            c->vLumBufSize = nextSlice - c->vLumFilterPos[i];
-        if (c->vChrFilterPos[chrI] + c->vChrBufSize <
-            (nextSlice >> c->chrSrcVSubSample))
-            c->vChrBufSize = (nextSlice >> c->chrSrcVSubSample) -
-                             c->vChrFilterPos[chrI];
-    }
-
     for (i = 0; i < 4; i++)
         FF_ALLOCZ_OR_GOTO(c, c->dither_error[i], (c->dstW+2) * sizeof(int), fail);
 
-    /* Allocate pixbufs (we use dynamic allocation because otherwise we would
-     * need to allocate several megabytes to handle all possible cases) */
-    FF_ALLOCZ_OR_GOTO(c, c->lumPixBuf,  c->vLumBufSize * 3 * sizeof(int16_t *), fail);
-    FF_ALLOCZ_OR_GOTO(c, c->chrUPixBuf, c->vChrBufSize * 3 * sizeof(int16_t *), fail);
-    FF_ALLOCZ_OR_GOTO(c, c->chrVPixBuf, c->vChrBufSize * 3 * sizeof(int16_t *), fail);
-    if (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat))
-        FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf, c->vLumBufSize * 3 * sizeof(int16_t *), fail);
-    /* Note we need at least one pixel more at the end because of the MMX code
-     * (just in case someone wants to replace the 4000/8000). */
-    /* align at 16 bytes for AltiVec */
-    for (i = 0; i < c->vLumBufSize; i++) {
-        FF_ALLOCZ_OR_GOTO(c, c->lumPixBuf[i + c->vLumBufSize],
-                          dst_stride + 16, fail);
-        c->lumPixBuf[i] = c->lumPixBuf[i + c->vLumBufSize];
-    }
+    c->needAlpha = (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) ? 1 : 0;
+
     // 64 / c->scalingBpp is the same as 16 / sizeof(scaling_intermediate)
     c->uv_off   = (dst_stride>>1) + 64 / (c->dstBpc &~ 7);
     c->uv_offx2 = dst_stride + 16;
-    for (i = 0; i < c->vChrBufSize; i++) {
-        FF_ALLOC_OR_GOTO(c, c->chrUPixBuf[i + c->vChrBufSize],
-                         dst_stride * 2 + 32, fail);
-        c->chrUPixBuf[i] = c->chrUPixBuf[i + c->vChrBufSize];
-        c->chrVPixBuf[i] = c->chrVPixBuf[i + c->vChrBufSize]
-                         = c->chrUPixBuf[i] + (dst_stride >> 1) + 8;
-    }
-    if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf)
-        for (i = 0; i < c->vLumBufSize; i++) {
-            FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf[i + c->vLumBufSize],
-                              dst_stride + 16, fail);
-            c->alpPixBuf[i] = c->alpPixBuf[i + c->vLumBufSize];
-        }
-
-    // try to avoid drawing green stuff between the right end and the stride end
-    for (i = 0; i < c->vChrBufSize; i++)
-        if(desc_dst->comp[0].depth == 16){
-            av_assert0(c->dstBpc > 14);
-            for(j=0; j<dst_stride/2+1; j++)
-                ((int32_t*)(c->chrUPixBuf[i]))[j] = 1<<18;
-        } else
-            for(j=0; j<dst_stride+1; j++)
-                ((int16_t*)(c->chrUPixBuf[i]))[j] = 1<<14;
 
     av_assert0(c->chrDstH <= dstH);
 
@@ -2325,25 +2270,6 @@ void sws_freeContext(SwsContext *c)
     if (!c)
         return;
 
-    if (c->lumPixBuf) {
-        for (i = 0; i < c->vLumBufSize; i++)
-            av_freep(&c->lumPixBuf[i]);
-        av_freep(&c->lumPixBuf);
-    }
-
-    if (c->chrUPixBuf) {
-        for (i = 0; i < c->vChrBufSize; i++)
-            av_freep(&c->chrUPixBuf[i]);
-        av_freep(&c->chrUPixBuf);
-        av_freep(&c->chrVPixBuf);
-    }
-
-    if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {
-        for (i = 0; i < c->vLumBufSize; i++)
-            av_freep(&c->alpPixBuf[i]);
-        av_freep(&c->alpPixBuf);
-    }
-
     for (i = 0; i < 4; i++)
         av_freep(&c->dither_error[i]);
 
-- 
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