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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 | 8d8d5cf2943da78ca5f84d1729b081312c031e6a (patch) | |
tree | f4c60b00a469733ff11901bd8fdc030c8f537f5c /jni_jpegstream/src/outputstream_wrapper.cpp | |
parent | 3ea8558300780ca5269d75230f78eadf4100876c (diff) | |
download | android_packages_apps_Snap-8d8d5cf2943da78ca5f84d1729b081312c031e6a.tar.gz android_packages_apps_Snap-8d8d5cf2943da78ca5f84d1729b081312c031e6a.tar.bz2 android_packages_apps_Snap-8d8d5cf2943da78ca5f84d1729b081312c031e6a.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/outputstream_wrapper.cpp')
-rw-r--r-- | jni_jpegstream/src/outputstream_wrapper.cpp | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/jni_jpegstream/src/outputstream_wrapper.cpp b/jni_jpegstream/src/outputstream_wrapper.cpp new file mode 100644 index 000000000..0639b6eea --- /dev/null +++ b/jni_jpegstream/src/outputstream_wrapper.cpp @@ -0,0 +1,49 @@ +/* + * 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 "outputstream_wrapper.h" +#include "error_codes.h" + +jmethodID OutputStreamWrapper::sWriteID = NULL; + +int32_t OutputStreamWrapper::write(int32_t length, int32_t offset) { + if (offset < 0 || length < 0 || (offset + length) > getBufferSize()) { + return J_ERROR_BAD_ARGS; + } + mEnv->ReleaseByteArrayElements(mByteArray, mBytes, JNI_COMMIT); + mBytes = NULL; + if (mEnv->ExceptionCheck()) { + return J_EXCEPTION; + } + if (sWriteID == NULL) { + LOGE("Uninitialized method ID for OutputStream write function."); + return J_ERROR_FATAL; + } + // Call OutputStream write with byte array. + mEnv->CallVoidMethod(mStream, sWriteID, mByteArray, offset, length); + if (mEnv->ExceptionCheck()) { + return J_EXCEPTION; + } + mBytes = mEnv->GetByteArrayElements(mByteArray, NULL); + if (mBytes == NULL || mEnv->ExceptionCheck()) { + return J_EXCEPTION; + } + return J_SUCCESS; +} + +void OutputStreamWrapper::setWriteMethodID(jmethodID id) { + sWriteID = id; +} |