several fixes for libjpeg related issues:

1. enable usage of libjpeg when libjpeg_turbo is not available;
2. remove forward declaration of some jpeg types since libjpeg and libjpeg_turbo have them defined differently;
3. pull in libjpeg code;
Review URL: http://webrtc-codereview.appspot.com/80003

git-svn-id: http://webrtc.googlecode.com/svn/trunk@230 4adac7df-926f-26a2-2b94-8c16560cd09d

DEPS

@@ -30,6 +30,9 @@ deps = {
   "trunk/third_party/libjpeg_turbo/":
     Var("chromium_trunk") + "/deps/third_party/libjpeg_turbo@78340",
 
+  "trunk/third_party/libjpeg/":
+    Var("chromium_trunk") + "/src/third_party/libjpeg@" + Var("chromium_revision"),
+
   "trunk/third_party/yasm/":
     Var("chromium_trunk") + "/src/third_party/yasm@" + Var("chromium_revision"),
 

src/common_video/jpeg/main/source/data_manager.cc

@@ -14,16 +14,6 @@
 
 #include "data_manager.h"
 
-#ifdef ANDROID
-extern "C" {
-#endif
-#include "jpeglib.h"
-#ifdef ANDROID
-}
-#endif
-#include "jmorecfg.h"
-
-
 namespace webrtc
 {
 

src/common_video/jpeg/main/source/data_manager.h

@@ -16,13 +16,9 @@
 #define WEBRTC_COMMON_VIDEO_JPEG_DATA_MANAGER
 
 #include <stdio.h>
-
+extern "C" {
-// jpeg forward declaration
+#include "jpeglib.h"
-struct jpeg_source_mgr;
+}
-typedef unsigned char JOCTET;
-typedef int boolean;
-typedef struct jpeg_decompress_struct* j_decompress_ptr;
-typedef struct jpeg_compress_struct* j_compress_ptr;
 
 namespace webrtc
 {

src/common_video/jpeg/main/source/jpeg.cc

@@ -22,13 +22,9 @@
 #if defined(WIN32)
  #include <basetsd.h>
 #endif
-#ifdef ANDROID
 extern "C" {
-#endif
 #include "jpeglib.h"
-#ifdef ANDROID
 }
-#endif
 #include <setjmp.h>
 
 

src/common_video/jpeg/main/source/jpeg.gyp

@@ -10,6 +10,9 @@
   'includes': [
     '../../../../common_settings.gypi', # Common settings
   ],
+  'variables': {
+    'use_libjpeg_turbo%': '<(use_libjpeg_turbo)',
+  },
   'targets': [
     {
       'target_name': 'webrtc_jpeg',
@@ -31,28 +34,20 @@
       'conditions': [
         ['build_with_chromium==1', {
           'dependencies': [
-            '../../../../../libjpeg_turbo/libjpeg.gyp:libjpeg',
+            '<(libjpeg_gyp_path):libjpeg',
           ],
-		  'include_dirs': [
+        }, {
-            '../../../../../libjpeg_turbo',
+          'conditions': [
+            ['use_libjpeg_turbo==1', {
+              'dependencies': [
+                '../../../../../third_party/libjpeg_turbo/libjpeg.gyp:libjpeg',
+              ],
+            }, {
+              'dependencies': [
+                '../../../../../third_party/libjpeg/libjpeg.gyp:libjpeg',
+              ],
+            }],
           ],
-		  'direct_dependent_settings': {
-			'include_dirs': [
-			  '../../../../../libjpeg_turbo', 
-			],
-		  },
-        },{
-          'dependencies': [
-            '../../../../../third_party/libjpeg_turbo/libjpeg.gyp:libjpeg',
-          ],
-          'include_dirs': [
-            '../../../../third_party/libjpeg_turbo',
-          ],
-          'direct_dependent_settings': {
-			'include_dirs': [
-			  '../../../../third_party/libjpeg_turbo', 
-			],
-		  },
         }],
       ],
       'sources': [