From f8eda05ad3696181dccbb1aad95c3b87a3897a0e Mon Sep 17 00:00:00 2001
From: Oliver Chang <ochang@chromium.org>
Date: Fri, 1 Apr 2016 13:40:46 -0700
Subject: Merge to M49: Reland "Fix sycc{420,422}_to_rgb issues."

Fix an incorrect unit test result.

This reverts commit 2df269c52741c12d63300cee806e96ae5d0b038f.

TBR=tsepez@chromium.org

Original Review URL: https://codereview.chromium.org/1803043002 .

(cherry picked from commit 3cc180234c14639d408003c8180ba2963f0ea665)

BUG=591785

Review URL: https://codereview.chromium.org/1837383011 .
---
 core/src/fxcodec/codec/fx_codec_jpx_opj.cpp      | 43 ++++++++++++++----------
 core/src/fxcodec/codec/fx_codec_jpx_unittest.cpp | 12 ++-----
 2 files changed, 28 insertions(+), 27 deletions(-)

diff --git a/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp b/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp
index c185d224f0..f27cab396b 100644
--- a/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp
+++ b/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp
@@ -8,7 +8,7 @@
 #include <limits>
 #include <vector>
 
-#include "codec_int.h"
+#include "core/src/fxcodec/codec/codec_int.h"
 #include "core/include/fpdfapi/fpdf_resource.h"
 #include "core/include/fxcodec/fx_codec.h"
 #include "core/include/fxcrt/fx_safe_types.h"
@@ -201,14 +201,30 @@ static void sycc444_to_rgb(opj_image_t* img) {
   FX_Free(img->comps[2].data);
   img->comps[2].data = d2;
 }
+static bool sycc420_422_size_is_valid(opj_image_t* img) {
+  return (img && img->comps[0].w != std::numeric_limits<OPJ_UINT32>::max() &&
+          (img->comps[0].w + 1) / 2 == img->comps[1].w &&
+          img->comps[1].w == img->comps[2].w &&
+          img->comps[1].h == img->comps[2].h);
+}
+static bool sycc420_size_is_valid(opj_image_t* img) {
+  return (sycc420_422_size_is_valid(img) &&
+          img->comps[0].h != std::numeric_limits<OPJ_UINT32>::max() &&
+          (img->comps[0].h + 1) / 2 == img->comps[1].h);
+}
+static bool sycc422_size_is_valid(opj_image_t* img) {
+  return (sycc420_422_size_is_valid(img) && img->comps[0].h == img->comps[1].h);
+}
 static void sycc422_to_rgb(opj_image_t* img) {
+  if (!sycc422_size_is_valid(img))
+    return;
+
   int prec = img->comps[0].prec;
   int offset = 1 << (prec - 1);
   int upb = (1 << prec) - 1;
-  OPJ_UINT32 maxw =
-      std::min(std::min(img->comps[0].w, img->comps[1].w), img->comps[2].w);
-  OPJ_UINT32 maxh =
-      std::min(std::min(img->comps[0].h, img->comps[1].h), img->comps[2].h);
+
+  OPJ_UINT32 maxw = img->comps[0].w;
+  OPJ_UINT32 maxh = img->comps[0].h;
   FX_SAFE_SIZE_T max_size = maxw;
   max_size *= maxh;
   if (!max_size.IsValid())
@@ -262,16 +278,13 @@ static void sycc422_to_rgb(opj_image_t* img) {
   img->comps[1].dy = img->comps[0].dy;
   img->comps[2].dy = img->comps[0].dy;
 }
-static bool sycc420_size_is_valid(OPJ_UINT32 y, OPJ_UINT32 cbcr) {
-  if (!y || !cbcr)
-    return false;
-
-  return (cbcr == y / 2) || ((y & 1) && (cbcr == y / 2 + 1));
-}
 static bool sycc420_must_extend_cbcr(OPJ_UINT32 y, OPJ_UINT32 cbcr) {
   return (y & 1) && (cbcr == y / 2);
 }
 void sycc420_to_rgb(opj_image_t* img) {
+  if (!sycc420_size_is_valid(img))
+    return;
+
   OPJ_UINT32 prec = img->comps[0].prec;
   if (!prec)
     return;
@@ -282,11 +295,6 @@ void sycc420_to_rgb(opj_image_t* img) {
   OPJ_UINT32 cbw = img->comps[1].w;
   OPJ_UINT32 cbh = img->comps[1].h;
   OPJ_UINT32 crw = img->comps[2].w;
-  OPJ_UINT32 crh = img->comps[2].h;
-  if (cbw != crw || cbh != crh)
-    return;
-  if (!sycc420_size_is_valid(yw, cbw) || !sycc420_size_is_valid(yh, cbh))
-    return;
   bool extw = sycc420_must_extend_cbcr(yw, cbw);
   bool exth = sycc420_must_extend_cbcr(yh, cbh);
   FX_SAFE_DWORD safeSize = yw;
@@ -859,8 +867,7 @@ bool CJPX_Decoder::Decode(uint8_t* dest_buf,
 }
 
 CCodec_JpxModule::CCodec_JpxModule() {}
-CCodec_JpxModule::~CCodec_JpxModule() {
-}
+CCodec_JpxModule::~CCodec_JpxModule() {}
 
 CJPX_Decoder* CCodec_JpxModule::CreateDecoder(const uint8_t* src_buf,
                                               FX_DWORD src_size,
diff --git a/core/src/fxcodec/codec/fx_codec_jpx_unittest.cpp b/core/src/fxcodec/codec/fx_codec_jpx_unittest.cpp
index 4139fbde3b..cebd16cfe2 100644
--- a/core/src/fxcodec/codec/fx_codec_jpx_unittest.cpp
+++ b/core/src/fxcodec/codec/fx_codec_jpx_unittest.cpp
@@ -6,7 +6,7 @@
 
 #include <limits>
 
-#include "codec_int.h"
+#include "core/src/fxcodec/codec/codec_int.h"
 #include "testing/fx_string_testhelpers.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -496,14 +496,8 @@ TEST(fxcodec, YUV420ToRGB) {
   const struct {
     OPJ_UINT32 w;
     bool expected;
-  } cases[] = {{0, false},
-               {1, false},
-               {30, false},
-               {31, true},
-               {32, true},
-               {33, true},
-               {34, false},
-               {UINT_MAX, false}};
+  } cases[] = {{0, false}, {1, false},  {30, false}, {31, true},
+               {32, true}, {33, false}, {34, false}, {UINT_MAX, false}};
   for (int i = 0; i < sizeof(cases) / sizeof(cases[0]); ++i) {
     y.w = cases[i].w;
     y.h = y.w;
-- 
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