diff options
Diffstat (limited to 'jni_jpegstream/src/jpeg_writer.cpp')
| -rw-r--r-- | jni_jpegstream/src/jpeg_writer.cpp | 218 |
1 files changed, 0 insertions, 218 deletions
diff --git a/jni_jpegstream/src/jpeg_writer.cpp b/jni_jpegstream/src/jpeg_writer.cpp deleted file mode 100644 index 4f7891778..000000000 --- a/jni_jpegstream/src/jpeg_writer.cpp +++ /dev/null @@ -1,218 +0,0 @@ -/* - * 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 "jpeg_hook.h" -#include "jpeg_writer.h" -#include "error_codes.h" - -#include <setjmp.h> -#include <assert.h> - -JpegWriter::JpegWriter() : mInfo(), - mErrorManager(), - mScanlineBuf(NULL), - mScanlineIter(NULL), - mScanlineBuflen(0), - mScanlineBytesRemaining(0), - mFormat(), - mFinished(false), - mSetup(false) {} - -JpegWriter::~JpegWriter() { - if (reset() != J_SUCCESS) { - LOGE("Failed to destroy compress object, may leak memory."); - } -} - -const int32_t JpegWriter::DEFAULT_X_DENSITY = 300; -const int32_t JpegWriter::DEFAULT_Y_DENSITY = 300; -const int32_t JpegWriter::DEFAULT_DENSITY_UNIT = 1; - -int32_t JpegWriter::setup(JNIEnv *env, jobject out, int32_t width, int32_t height, - Jpeg_Config::Format format, int32_t quality) { - if (mFinished || mSetup) { - return J_ERROR_FATAL; - } - if (env->ExceptionCheck()) { - return J_EXCEPTION; - } - if (height <= 0 || width <= 0 || quality <= 0 || quality > 100) { - return J_ERROR_BAD_ARGS; - } - // Setup error handler - SetupErrMgr(reinterpret_cast<j_common_ptr>(&mInfo), &mErrorManager); - - // Set jump address for error handling - if (setjmp(mErrorManager.setjmp_buf)) { - return J_ERROR_FATAL; - } - - // Setup cinfo struct - jpeg_create_compress(&mInfo); - - // Setup global java refs - int32_t flags = MakeDst(&mInfo, env, out); - if (flags != J_SUCCESS) { - return flags; - } - - // Initialize width, height, and color space - mInfo.image_width = width; - mInfo.image_height = height; - const int components = (static_cast<int>(format) & 0xff); - switch (components) { - case 1: - mInfo.input_components = 1; - mInfo.in_color_space = JCS_GRAYSCALE; - break; - case 3: - case 4: - mInfo.input_components = 3; - mInfo.in_color_space = JCS_RGB; - break; - default: - return J_ERROR_BAD_ARGS; - } - - // Set defaults - jpeg_set_defaults(&mInfo); - mInfo.density_unit = DEFAULT_DENSITY_UNIT; // JFIF code for pixel size units: - // 1 = in, 2 = cm - mInfo.X_density = DEFAULT_X_DENSITY; // Horizontal pixel density - mInfo.Y_density = DEFAULT_Y_DENSITY; // Vertical pixel density - - // Set compress quality - jpeg_set_quality(&mInfo, quality, TRUE); - - mFormat = format; - - // Setup scanline buffer - mScanlineBuflen = width * components; - mScanlineBytesRemaining = mScanlineBuflen; - mScanlineBuf = (JSAMPLE *) (mInfo.mem->alloc_small)( - reinterpret_cast<j_common_ptr>(&mInfo), JPOOL_PERMANENT, - mScanlineBuflen * sizeof(JSAMPLE)); - mScanlineIter = mScanlineBuf; - - // Start compression - jpeg_start_compress(&mInfo, TRUE); - mSetup = true; - return J_SUCCESS; -} - -int32_t JpegWriter::write(int8_t* bytes, int32_t length) { - if (!mSetup) { - return J_ERROR_FATAL; - } - if (mFinished) { - return 0; - } - // Set jump address for error handling - if (setjmp(mErrorManager.setjmp_buf)) { - return J_ERROR_FATAL; - } - if (length < 0 || bytes == NULL) { - return J_ERROR_BAD_ARGS; - } - - int32_t total_length = length; - JSAMPROW row_pointer[1]; - while (mInfo.next_scanline < mInfo.image_height) { - if (length < mScanlineBytesRemaining) { - // read partial scanline and return - memcpy((void*) mScanlineIter, (void*) bytes, - length * sizeof(int8_t)); - mScanlineBytesRemaining -= length; - mScanlineIter += length; - return total_length; - } else if (length > 0) { - // read full scanline - memcpy((void*) mScanlineIter, (void*) bytes, - mScanlineBytesRemaining * sizeof(int8_t)); - bytes += mScanlineBytesRemaining; - length -= mScanlineBytesRemaining; - mScanlineBytesRemaining = 0; - } - // Do in-place pixel formatting - formatPixels(static_cast<uint8_t*>(mScanlineBuf), mScanlineBuflen); - row_pointer[0] = mScanlineBuf; - // Do compression - if (jpeg_write_scanlines(&mInfo, row_pointer, 1) != 1) { - return J_ERROR_FATAL; - } - // Reset scanline buffer - mScanlineBytesRemaining = mScanlineBuflen; - mScanlineIter = mScanlineBuf; - } - jpeg_finish_compress(&mInfo); - mFinished = true; - return total_length - length; -} - -// Does in-place pixel formatting -void JpegWriter::formatPixels(uint8_t* buf, int32_t len) { - // Assumes len is a multiple of 4 for RGBA and ABGR pixels. - assert((len % 4) == 0); - uint8_t* d = buf; - switch (mFormat) { - case Jpeg_Config::FORMAT_RGBA: { - // Strips alphas - for (int i = 0; i < len / 4; ++i, buf += 4) { - *d++ = buf[0]; - *d++ = buf[1]; - *d++ = buf[2]; - } - break; - } - case Jpeg_Config::FORMAT_ABGR: { - // Strips alphas and flips endianness - if (len / 4 >= 1) { - *d++ = buf[3]; - uint8_t tmp = *d; - *d++ = buf[2]; - *d++ = tmp; - } - for (int i = 1; i < len / 4; ++i, buf += 4) { - *d++ = buf[3]; - *d++ = buf[2]; - *d++ = buf[1]; - } - break; - } - default: { - // Do nothing - break; - } - } -} - -void JpegWriter::updateEnv(JNIEnv *env) { - UpdateDstEnv(&mInfo, env); -} - -int32_t JpegWriter::reset() { - // Set jump address for error handling - if (setjmp(mErrorManager.setjmp_buf)) { - return J_ERROR_FATAL; - } - // Clean up global java references - CleanDst(&mInfo); - // Wipe compress struct, free memory pools - jpeg_destroy_compress(&mInfo); - mFinished = false; - mSetup = false; - return J_SUCCESS; -} |