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author | Ruben Brunk <rubenbrunk@google.com> | 2013-06-28 20:02:54 -0700 |
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committer | Ruben Brunk <rubenbrunk@google.com> | 2013-07-11 13:41:29 -0700 |
commit | a8221bbdb8ece9b02dbf7b72565f9fbc5b314f7c (patch) | |
tree | 0fd84567e4f8a8d2bff0e7dcd696c88d518251cb /jni_jpegstream/src/jerr_hook.cpp | |
parent | 0c1b4c6422a4d2d9b81cc0946d1c9675440a94e2 (diff) | |
download | android_packages_apps_Gallery2-a8221bbdb8ece9b02dbf7b72565f9fbc5b314f7c.tar.gz android_packages_apps_Gallery2-a8221bbdb8ece9b02dbf7b72565f9fbc5b314f7c.tar.bz2 android_packages_apps_Gallery2-a8221bbdb8ece9b02dbf7b72565f9fbc5b314f7c.zip |
Added jpeg streaming classes.
- Provides streaming operations for decompressing/compressing
JPEG files.
- Allows pixel operations to be performed on large JPEG images
without holding the entire bitmap in memory.
Change-Id: I597ddf282b59d2ba6d6bca4722208121e3728f94
Diffstat (limited to 'jni_jpegstream/src/jerr_hook.cpp')
-rw-r--r-- | jni_jpegstream/src/jerr_hook.cpp | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/jni_jpegstream/src/jerr_hook.cpp b/jni_jpegstream/src/jerr_hook.cpp new file mode 100644 index 000000000..f8f864f78 --- /dev/null +++ b/jni_jpegstream/src/jerr_hook.cpp @@ -0,0 +1,52 @@ +/* + * Copyright (C) 2013 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + + +#include "jerr_hook.h" +#include "jni_defines.h" + +/** + * Replaces libjpeg's error_exit function, returns control to + * the point + */ +void ErrExit(j_common_ptr cinfo) { + ErrManager* mgr = reinterpret_cast<ErrManager*>(cinfo->err); + (*cinfo->err->output_message) (cinfo); + // Returns control to error handling in jpeg_writer + longjmp(mgr->setjmp_buf, 1); +} + +/** + * Replaces libjpeg's output_message function, writes message + * to logcat's error log. + */ +void ErrOutput(j_common_ptr cinfo) { + ErrManager* mgr = reinterpret_cast<ErrManager*>(cinfo->err); + char buf[JMSG_LENGTH_MAX]; + (*cinfo->err->format_message) (cinfo, buf); + buf[JMSG_LENGTH_MAX - 1] = '\0'; // Force null terminator + // Output error message in ndk logcat. + LOGE("%s\n", buf); +} + +void SetupErrMgr(j_common_ptr cinfo, ErrManager* errMgr) { + jpeg_std_error(&(errMgr->mgr)); + errMgr->mgr.error_exit = ErrExit; + errMgr->mgr.output_message = ErrOutput; + cinfo->err = reinterpret_cast<struct jpeg_error_mgr*>(errMgr); +} + + |