mirror of
https://github.com/DrKLO/Telegram.git
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239 lines
9 KiB
C++
239 lines
9 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <android/log.h>
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#include <jni.h>
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#include <array>
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#include <cstdlib>
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#include <cstring>
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#include "include/flac_parser.h"
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#define LOG_TAG "flac_jni"
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#define ALOGE(...) \
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((void)__android_log_print(ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__))
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#define ALOGV(...) \
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((void)__android_log_print(ANDROID_LOG_VERBOSE, LOG_TAG, __VA_ARGS__))
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#define DECODER_FUNC(RETURN_TYPE, NAME, ...) \
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extern "C" { \
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JNIEXPORT RETURN_TYPE \
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Java_com_google_android_exoplayer2_ext_flac_FlacDecoderJni_##NAME( \
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JNIEnv *env, jobject thiz, ##__VA_ARGS__); \
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} \
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JNIEXPORT RETURN_TYPE \
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Java_com_google_android_exoplayer2_ext_flac_FlacDecoderJni_##NAME( \
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JNIEnv *env, jobject thiz, ##__VA_ARGS__)
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class JavaDataSource : public DataSource {
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public:
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void setFlacDecoderJni(JNIEnv *env, jobject flacDecoderJni) {
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this->env = env;
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this->flacDecoderJni = flacDecoderJni;
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if (mid == NULL) {
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jclass cls = env->GetObjectClass(flacDecoderJni);
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mid = env->GetMethodID(cls, "read", "(Ljava/nio/ByteBuffer;)I");
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env->DeleteLocalRef(cls);
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}
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}
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ssize_t readAt(off64_t offset, void *const data, size_t size) {
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jobject byteBuffer = env->NewDirectByteBuffer(data, size);
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int result = env->CallIntMethod(flacDecoderJni, mid, byteBuffer);
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if (env->ExceptionCheck()) {
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// Exception is thrown in Java when returning from the native call.
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result = -1;
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}
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env->DeleteLocalRef(byteBuffer);
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return result;
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}
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private:
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JNIEnv *env;
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jobject flacDecoderJni;
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jmethodID mid;
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};
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struct Context {
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JavaDataSource *source;
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FLACParser *parser;
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Context() {
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source = new JavaDataSource();
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parser = new FLACParser(source);
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}
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~Context() {
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delete parser;
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delete source;
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}
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};
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DECODER_FUNC(jlong, flacInit) {
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Context *context = new Context;
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if (!context->parser->init()) {
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delete context;
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return 0;
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}
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return reinterpret_cast<intptr_t>(context);
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}
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DECODER_FUNC(jobject, flacDecodeMetadata, jlong jContext) {
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Context *context = reinterpret_cast<Context *>(jContext);
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context->source->setFlacDecoderJni(env, thiz);
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if (!context->parser->decodeMetadata()) {
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return NULL;
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}
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jclass arrayListClass = env->FindClass("java/util/ArrayList");
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jmethodID arrayListConstructor =
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env->GetMethodID(arrayListClass, "<init>", "()V");
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jobject commentList = env->NewObject(arrayListClass, arrayListConstructor);
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jmethodID arrayListAddMethod =
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env->GetMethodID(arrayListClass, "add", "(Ljava/lang/Object;)Z");
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if (context->parser->areVorbisCommentsValid()) {
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std::vector<std::string> vorbisComments =
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context->parser->getVorbisComments();
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for (std::vector<std::string>::const_iterator vorbisComment =
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vorbisComments.begin();
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vorbisComment != vorbisComments.end(); ++vorbisComment) {
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jstring commentString = env->NewStringUTF((*vorbisComment).c_str());
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env->CallBooleanMethod(commentList, arrayListAddMethod, commentString);
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env->DeleteLocalRef(commentString);
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}
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}
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jobject pictureFrames = env->NewObject(arrayListClass, arrayListConstructor);
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bool picturesValid = context->parser->arePicturesValid();
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if (picturesValid) {
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std::vector<FlacPicture> pictures = context->parser->getPictures();
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jclass pictureFrameClass = env->FindClass(
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"com/google/android/exoplayer2/metadata/flac/PictureFrame");
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jmethodID pictureFrameConstructor =
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env->GetMethodID(pictureFrameClass, "<init>",
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"(ILjava/lang/String;Ljava/lang/String;IIII[B)V");
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for (std::vector<FlacPicture>::const_iterator picture = pictures.begin();
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picture != pictures.end(); ++picture) {
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jstring mimeType = env->NewStringUTF(picture->mimeType.c_str());
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jstring description = env->NewStringUTF(picture->description.c_str());
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jbyteArray pictureData = env->NewByteArray(picture->data.size());
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env->SetByteArrayRegion(pictureData, 0, picture->data.size(),
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(signed char *)&picture->data[0]);
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jobject pictureFrame = env->NewObject(
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pictureFrameClass, pictureFrameConstructor, picture->type, mimeType,
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description, picture->width, picture->height, picture->depth,
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picture->colors, pictureData);
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env->CallBooleanMethod(pictureFrames, arrayListAddMethod, pictureFrame);
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env->DeleteLocalRef(mimeType);
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env->DeleteLocalRef(description);
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env->DeleteLocalRef(pictureData);
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}
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}
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const FLAC__StreamMetadata_StreamInfo &streamInfo =
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context->parser->getStreamInfo();
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jclass flacStreamMetadataClass = env->FindClass(
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"com/google/android/exoplayer2/extractor/"
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"FlacStreamMetadata");
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jmethodID flacStreamMetadataConstructor =
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env->GetMethodID(flacStreamMetadataClass, "<init>",
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"(IIIIIIIJLjava/util/ArrayList;Ljava/util/ArrayList;)V");
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return env->NewObject(flacStreamMetadataClass, flacStreamMetadataConstructor,
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streamInfo.min_blocksize, streamInfo.max_blocksize,
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streamInfo.min_framesize, streamInfo.max_framesize,
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streamInfo.sample_rate, streamInfo.channels,
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streamInfo.bits_per_sample, streamInfo.total_samples,
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commentList, pictureFrames);
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}
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DECODER_FUNC(jint, flacDecodeToBuffer, jlong jContext, jobject jOutputBuffer) {
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Context *context = reinterpret_cast<Context *>(jContext);
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context->source->setFlacDecoderJni(env, thiz);
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void *outputBuffer = env->GetDirectBufferAddress(jOutputBuffer);
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jint outputSize = env->GetDirectBufferCapacity(jOutputBuffer);
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return context->parser->readBuffer(outputBuffer, outputSize);
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}
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DECODER_FUNC(jint, flacDecodeToArray, jlong jContext, jbyteArray jOutputArray) {
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Context *context = reinterpret_cast<Context *>(jContext);
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context->source->setFlacDecoderJni(env, thiz);
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jbyte *outputBuffer = env->GetByteArrayElements(jOutputArray, NULL);
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jint outputSize = env->GetArrayLength(jOutputArray);
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int count = context->parser->readBuffer(outputBuffer, outputSize);
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env->ReleaseByteArrayElements(jOutputArray, outputBuffer, 0);
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return count;
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}
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DECODER_FUNC(jlong, flacGetDecodePosition, jlong jContext) {
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Context *context = reinterpret_cast<Context *>(jContext);
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return context->parser->getDecodePosition();
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}
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DECODER_FUNC(jlong, flacGetLastFrameTimestamp, jlong jContext) {
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Context *context = reinterpret_cast<Context *>(jContext);
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return context->parser->getLastFrameTimestamp();
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}
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DECODER_FUNC(jlong, flacGetLastFrameFirstSampleIndex, jlong jContext) {
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Context *context = reinterpret_cast<Context *>(jContext);
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return context->parser->getLastFrameFirstSampleIndex();
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}
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DECODER_FUNC(jlong, flacGetNextFrameFirstSampleIndex, jlong jContext) {
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Context *context = reinterpret_cast<Context *>(jContext);
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return context->parser->getNextFrameFirstSampleIndex();
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}
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DECODER_FUNC(jboolean, flacGetSeekPoints, jlong jContext, jlong timeUs,
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jlongArray outSeekPoints) {
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Context *context = reinterpret_cast<Context *>(jContext);
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std::array<int64_t, 4> result;
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bool success = context->parser->getSeekPositions(timeUs, result);
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if (success) {
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env->SetLongArrayRegion(outSeekPoints, 0, result.size(), result.data());
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}
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return success;
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}
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DECODER_FUNC(jstring, flacGetStateString, jlong jContext) {
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Context *context = reinterpret_cast<Context *>(jContext);
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const char *str = context->parser->getDecoderStateString();
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return env->NewStringUTF(str);
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}
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DECODER_FUNC(jboolean, flacIsDecoderAtEndOfStream, jlong jContext) {
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Context *context = reinterpret_cast<Context *>(jContext);
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return context->parser->isDecoderAtEndOfStream();
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}
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DECODER_FUNC(void, flacFlush, jlong jContext) {
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Context *context = reinterpret_cast<Context *>(jContext);
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context->parser->flush();
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}
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DECODER_FUNC(void, flacReset, jlong jContext, jlong newPosition) {
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Context *context = reinterpret_cast<Context *>(jContext);
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context->parser->reset(newPosition);
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}
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DECODER_FUNC(void, flacRelease, jlong jContext) {
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Context *context = reinterpret_cast<Context *>(jContext);
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delete context;
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}
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