mirror of
https://github.com/DrKLO/Telegram.git
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156 lines
5.7 KiB
C++
156 lines
5.7 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 <jni.h>
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#include <android/log.h>
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#include <cstdlib>
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#include "opus.h" // NOLINT
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#include "opus_multistream.h" // NOLINT
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#define LOG_TAG "opus_jni"
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#define LOGE(...) ((void)__android_log_print(ANDROID_LOG_ERROR, LOG_TAG, \
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__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_opus_OpusDecoder_ ## 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_opus_OpusDecoder_ ## NAME \
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(JNIEnv* env, jobject thiz, ##__VA_ARGS__)\
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#define LIBRARY_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_opus_OpusLibrary_ ## 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_opus_OpusLibrary_ ## NAME \
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(JNIEnv* env, jobject thiz, ##__VA_ARGS__)\
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// JNI references for SimpleOutputBuffer class.
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static jmethodID outputBufferInit;
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static const int kBytesPerSample = 2; // opus fixed point uses 16 bit samples.
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static const int kMaxOpusOutputPacketSizeSamples = 960 * 6;
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static int channelCount;
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static int errorCode;
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DECODER_FUNC(jlong, opusInit, jint sampleRate, jint channelCount,
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jint numStreams, jint numCoupled, jint gain, jbyteArray jStreamMap) {
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int status = OPUS_INVALID_STATE;
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::channelCount = channelCount;
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errorCode = 0;
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jbyte* streamMapBytes = env->GetByteArrayElements(jStreamMap, 0);
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uint8_t* streamMap = reinterpret_cast<uint8_t*>(streamMapBytes);
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OpusMSDecoder* decoder = opus_multistream_decoder_create(
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sampleRate, channelCount, numStreams, numCoupled, streamMap, &status);
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env->ReleaseByteArrayElements(jStreamMap, streamMapBytes, 0);
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if (!decoder || status != OPUS_OK) {
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LOGE("Failed to create Opus Decoder; status=%s", opus_strerror(status));
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return 0;
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}
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status = opus_multistream_decoder_ctl(decoder, OPUS_SET_GAIN(gain));
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if (status != OPUS_OK) {
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LOGE("Failed to set Opus header gain; status=%s", opus_strerror(status));
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return 0;
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}
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// Populate JNI References.
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const jclass outputBufferClass = env->FindClass(
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"com/google/android/exoplayer2/decoder/SimpleOutputBuffer");
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outputBufferInit = env->GetMethodID(outputBufferClass, "init",
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"(JI)Ljava/nio/ByteBuffer;");
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return reinterpret_cast<intptr_t>(decoder);
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}
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DECODER_FUNC(jint, opusDecode, jlong jDecoder, jlong jTimeUs,
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jobject jInputBuffer, jint inputSize, jobject jOutputBuffer) {
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OpusMSDecoder* decoder = reinterpret_cast<OpusMSDecoder*>(jDecoder);
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const uint8_t* inputBuffer =
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reinterpret_cast<const uint8_t*>(
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env->GetDirectBufferAddress(jInputBuffer));
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const jint outputSize =
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kMaxOpusOutputPacketSizeSamples * kBytesPerSample * channelCount;
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env->CallObjectMethod(jOutputBuffer, outputBufferInit, jTimeUs, outputSize);
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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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return -1;
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}
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const jobject jOutputBufferData = env->CallObjectMethod(jOutputBuffer,
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outputBufferInit, jTimeUs, outputSize);
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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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return -1;
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}
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int16_t* outputBufferData = reinterpret_cast<int16_t*>(
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env->GetDirectBufferAddress(jOutputBufferData));
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int sampleCount = opus_multistream_decode(decoder, inputBuffer, inputSize,
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outputBufferData, kMaxOpusOutputPacketSizeSamples, 0);
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// record error code
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errorCode = (sampleCount < 0) ? sampleCount : 0;
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return (sampleCount < 0) ? sampleCount
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: sampleCount * kBytesPerSample * channelCount;
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}
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DECODER_FUNC(jint, opusSecureDecode, jlong jDecoder, jlong jTimeUs,
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jobject jInputBuffer, jint inputSize, jobject jOutputBuffer,
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jint sampleRate, jobject mediaCrypto, jint inputMode, jbyteArray key,
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jbyteArray javaIv, jint inputNumSubSamples, jintArray numBytesOfClearData,
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jintArray numBytesOfEncryptedData) {
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// Doesn't support
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// Java client should have checked vpxSupportSecureDecode
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// and avoid calling this
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// return -2 (DRM Error)
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return -2;
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}
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DECODER_FUNC(void, opusClose, jlong jDecoder) {
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OpusMSDecoder* decoder = reinterpret_cast<OpusMSDecoder*>(jDecoder);
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opus_multistream_decoder_destroy(decoder);
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}
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DECODER_FUNC(void, opusReset, jlong jDecoder) {
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OpusMSDecoder* decoder = reinterpret_cast<OpusMSDecoder*>(jDecoder);
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opus_multistream_decoder_ctl(decoder, OPUS_RESET_STATE);
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}
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DECODER_FUNC(jstring, opusGetErrorMessage, jlong jContext) {
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return env->NewStringUTF(opus_strerror(errorCode));
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}
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DECODER_FUNC(jint, opusGetErrorCode, jlong jContext) {
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return errorCode;
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}
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LIBRARY_FUNC(jstring, opusIsSecureDecodeSupported) {
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// Doesn't support
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return 0;
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}
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LIBRARY_FUNC(jstring, opusGetVersion) {
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return env->NewStringUTF(opus_get_version_string());
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}
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