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- /*
- * Copyright (C) 2016 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 <jni.h>
- #include <android/log.h>
- #include <cstdlib>
- #include "opus.h" // NOLINT
- #include "opus_multistream.h" // NOLINT
- #define LOG_TAG "opus_jni"
- #define LOGE(...) ((void)__android_log_print(ANDROID_LOG_ERROR, LOG_TAG, \
- __VA_ARGS__))
- #define DECODER_FUNC(RETURN_TYPE, NAME, ...) \
- extern "C" { \
- JNIEXPORT RETURN_TYPE \
- Java_com_google_android_exoplayer2_ext_opus_OpusDecoder_ ## NAME \
- (JNIEnv* env, jobject thiz, ##__VA_ARGS__);\
- } \
- JNIEXPORT RETURN_TYPE \
- Java_com_google_android_exoplayer2_ext_opus_OpusDecoder_ ## NAME \
- (JNIEnv* env, jobject thiz, ##__VA_ARGS__)\
- #define LIBRARY_FUNC(RETURN_TYPE, NAME, ...) \
- extern "C" { \
- JNIEXPORT RETURN_TYPE \
- Java_com_google_android_exoplayer2_ext_opus_OpusLibrary_ ## NAME \
- (JNIEnv* env, jobject thiz, ##__VA_ARGS__);\
- } \
- JNIEXPORT RETURN_TYPE \
- Java_com_google_android_exoplayer2_ext_opus_OpusLibrary_ ## NAME \
- (JNIEnv* env, jobject thiz, ##__VA_ARGS__)\
- // JNI references for SimpleOutputBuffer class.
- static jmethodID outputBufferInit;
- static const int kBytesPerSample = 2; // opus fixed point uses 16 bit samples.
- static const int kMaxOpusOutputPacketSizeSamples = 960 * 6;
- static int channelCount;
- static int errorCode;
- DECODER_FUNC(jlong, opusInit, jint sampleRate, jint channelCount,
- jint numStreams, jint numCoupled, jint gain, jbyteArray jStreamMap) {
- int status = OPUS_INVALID_STATE;
- ::channelCount = channelCount;
- errorCode = 0;
- jbyte* streamMapBytes = env->GetByteArrayElements(jStreamMap, 0);
- uint8_t* streamMap = reinterpret_cast<uint8_t*>(streamMapBytes);
- OpusMSDecoder* decoder = opus_multistream_decoder_create(
- sampleRate, channelCount, numStreams, numCoupled, streamMap, &status);
- env->ReleaseByteArrayElements(jStreamMap, streamMapBytes, 0);
- if (!decoder || status != OPUS_OK) {
- LOGE("Failed to create Opus Decoder; status=%s", opus_strerror(status));
- return 0;
- }
- status = opus_multistream_decoder_ctl(decoder, OPUS_SET_GAIN(gain));
- if (status != OPUS_OK) {
- LOGE("Failed to set Opus header gain; status=%s", opus_strerror(status));
- return 0;
- }
- // Populate JNI References.
- const jclass outputBufferClass = env->FindClass(
- "com/google/android/exoplayer2/decoder/SimpleOutputBuffer");
- outputBufferInit = env->GetMethodID(outputBufferClass, "init",
- "(JI)Ljava/nio/ByteBuffer;");
- return reinterpret_cast<intptr_t>(decoder);
- }
- DECODER_FUNC(jint, opusDecode, jlong jDecoder, jlong jTimeUs,
- jobject jInputBuffer, jint inputSize, jobject jOutputBuffer) {
- OpusMSDecoder* decoder = reinterpret_cast<OpusMSDecoder*>(jDecoder);
- const uint8_t* inputBuffer =
- reinterpret_cast<const uint8_t*>(
- env->GetDirectBufferAddress(jInputBuffer));
- const jint outputSize =
- kMaxOpusOutputPacketSizeSamples * kBytesPerSample * channelCount;
- env->CallObjectMethod(jOutputBuffer, outputBufferInit, jTimeUs, outputSize);
- if (env->ExceptionCheck()) {
- // Exception is thrown in Java when returning from the native call.
- return -1;
- }
- const jobject jOutputBufferData = env->CallObjectMethod(jOutputBuffer,
- outputBufferInit, jTimeUs, outputSize);
- if (env->ExceptionCheck()) {
- // Exception is thrown in Java when returning from the native call.
- return -1;
- }
- int16_t* outputBufferData = reinterpret_cast<int16_t*>(
- env->GetDirectBufferAddress(jOutputBufferData));
- int sampleCount = opus_multistream_decode(decoder, inputBuffer, inputSize,
- outputBufferData, kMaxOpusOutputPacketSizeSamples, 0);
- // record error code
- errorCode = (sampleCount < 0) ? sampleCount : 0;
- return (sampleCount < 0) ? sampleCount
- : sampleCount * kBytesPerSample * channelCount;
- }
- DECODER_FUNC(jint, opusSecureDecode, jlong jDecoder, jlong jTimeUs,
- jobject jInputBuffer, jint inputSize, jobject jOutputBuffer,
- jint sampleRate, jobject mediaCrypto, jint inputMode, jbyteArray key,
- jbyteArray javaIv, jint inputNumSubSamples, jintArray numBytesOfClearData,
- jintArray numBytesOfEncryptedData) {
- // Doesn't support
- // Java client should have checked vpxSupportSecureDecode
- // and avoid calling this
- // return -2 (DRM Error)
- return -2;
- }
- DECODER_FUNC(void, opusClose, jlong jDecoder) {
- OpusMSDecoder* decoder = reinterpret_cast<OpusMSDecoder*>(jDecoder);
- opus_multistream_decoder_destroy(decoder);
- }
- DECODER_FUNC(void, opusReset, jlong jDecoder) {
- OpusMSDecoder* decoder = reinterpret_cast<OpusMSDecoder*>(jDecoder);
- opus_multistream_decoder_ctl(decoder, OPUS_RESET_STATE);
- }
- DECODER_FUNC(jstring, opusGetErrorMessage, jlong jContext) {
- return env->NewStringUTF(opus_strerror(errorCode));
- }
- DECODER_FUNC(jint, opusGetErrorCode, jlong jContext) {
- return errorCode;
- }
- LIBRARY_FUNC(jstring, opusIsSecureDecodeSupported) {
- // Doesn't support
- return 0;
- }
- LIBRARY_FUNC(jstring, opusGetVersion) {
- return env->NewStringUTF(opus_get_version_string());
- }
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