1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 18 #include "jerr_hook.h" 19 #include "jni_defines.h" 20 21 /** 22 * Replaces libjpeg's error_exit function, returns control to 23 * the point 24 */ 25 void ErrExit(j_common_ptr cinfo) { 26 ErrManager* mgr = reinterpret_cast<ErrManager*>(cinfo->err); 27 (*cinfo->err->output_message) (cinfo); 28 // Returns control to error handling in jpeg_writer 29 longjmp(mgr->setjmp_buf, 1); 30 } 31 32 /** 33 * Replaces libjpeg's output_message function, writes message 34 * to logcat's error log. 35 */ 36 void ErrOutput(j_common_ptr cinfo) { 37 ErrManager* mgr = reinterpret_cast<ErrManager*>(cinfo->err); 38 char buf[JMSG_LENGTH_MAX]; 39 (*cinfo->err->format_message) (cinfo, buf); 40 buf[JMSG_LENGTH_MAX - 1] = '\0'; // Force null terminator 41 // Output error message in ndk logcat. 42 LOGE("%s\n", buf); 43 } 44 45 void SetupErrMgr(j_common_ptr cinfo, ErrManager* errMgr) { 46 jpeg_std_error(&(errMgr->mgr)); 47 errMgr->mgr.error_exit = ErrExit; 48 errMgr->mgr.output_message = ErrOutput; 49 cinfo->err = reinterpret_cast<struct jpeg_error_mgr*>(errMgr); 50 } 51 52 53
