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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/midi/usb_midi_device_android.h"
#include <stddef.h>
#include "base/android/jni_array.h"
#include "base/i18n/icu_string_conversions.h"
#include "base/strings/stringprintf.h"
#include "base/time/time.h"
#include "jni/UsbMidiDeviceAndroid_jni.h"
#include "media/midi/usb_midi_descriptor_parser.h"
namespace media {
namespace midi {
UsbMidiDeviceAndroid::UsbMidiDeviceAndroid(
const base::android::JavaRef<jobject>& raw_device,
UsbMidiDeviceDelegate* delegate)
: raw_device_(raw_device), delegate_(delegate) {
JNIEnv* env = base::android::AttachCurrentThread();
Java_UsbMidiDeviceAndroid_registerSelf(env, raw_device_.obj(),
reinterpret_cast<jlong>(this));
GetDescriptorsInternal();
InitDeviceInfo();
}
UsbMidiDeviceAndroid::~UsbMidiDeviceAndroid() {
JNIEnv* env = base::android::AttachCurrentThread();
Java_UsbMidiDeviceAndroid_close(env, raw_device_.obj());
}
std::vector<uint8_t> UsbMidiDeviceAndroid::GetDescriptors() {
return descriptors_;
}
std::string UsbMidiDeviceAndroid::GetManufacturer() {
return manufacturer_;
}
std::string UsbMidiDeviceAndroid::GetProductName() {
return product_;
}
std::string UsbMidiDeviceAndroid::GetDeviceVersion() {
return device_version_;
}
void UsbMidiDeviceAndroid::Send(int endpoint_number,
const std::vector<uint8_t>& data) {
JNIEnv* env = base::android::AttachCurrentThread();
const uint8_t* head = data.size() ? &data[0] : NULL;
ScopedJavaLocalRef<jbyteArray> data_to_pass =
base::android::ToJavaByteArray(env, head, data.size());
Java_UsbMidiDeviceAndroid_send(env, raw_device_.obj(), endpoint_number,
data_to_pass.obj());
}
void UsbMidiDeviceAndroid::OnData(JNIEnv* env,
const JavaParamRef<jobject>& caller,
jint endpoint_number,
const JavaParamRef<jbyteArray>& data) {
std::vector<uint8_t> bytes;
base::android::JavaByteArrayToByteVector(env, data, &bytes);
const uint8_t* head = bytes.size() ? &bytes[0] : NULL;
delegate_->ReceiveUsbMidiData(this, endpoint_number, head, bytes.size(),
base::TimeTicks::Now());
}
bool UsbMidiDeviceAndroid::RegisterUsbMidiDevice(JNIEnv* env) {
return RegisterNativesImpl(env);
}
void UsbMidiDeviceAndroid::GetDescriptorsInternal() {
JNIEnv* env = base::android::AttachCurrentThread();
base::android::ScopedJavaLocalRef<jbyteArray> descriptors =
Java_UsbMidiDeviceAndroid_getDescriptors(env, raw_device_.obj());
base::android::JavaByteArrayToByteVector(env, descriptors.obj(),
&descriptors_);
}
void UsbMidiDeviceAndroid::InitDeviceInfo() {
UsbMidiDescriptorParser parser;
UsbMidiDescriptorParser::DeviceInfo info;
const uint8_t* data = descriptors_.size() > 0 ? &descriptors_[0] : nullptr;
if (!parser.ParseDeviceInfo(data, descriptors_.size(), &info)) {
// We don't report the error here. If it is critical, we will realize it
// when we parse the descriptors again for ports.
manufacturer_ = "invalid descriptor";
product_ = "invalid descriptor";
device_version_ = "invalid descriptor";
return;
}
manufacturer_ =
GetString(info.manufacturer_index,
base::StringPrintf("(vendor id = 0x%04x)", info.vendor_id));
product_ =
GetString(info.product_index,
base::StringPrintf("(product id = 0x%04x)", info.product_id));
device_version_ = info.BcdVersionToString(info.bcd_device_version);
}
std::vector<uint8_t> UsbMidiDeviceAndroid::GetStringDescriptor(int index) {
JNIEnv* env = base::android::AttachCurrentThread();
base::android::ScopedJavaLocalRef<jbyteArray> descriptors =
Java_UsbMidiDeviceAndroid_getStringDescriptor(env, raw_device_.obj(),
index);
std::vector<uint8_t> ret;
base::android::JavaByteArrayToByteVector(env, descriptors.obj(), &ret);
return ret;
}
std::string UsbMidiDeviceAndroid::GetString(int index,
const std::string& backup) {
const uint8_t DESCRIPTOR_TYPE_STRING = 3;
if (!index) {
// index 0 means there is no such descriptor.
return backup;
}
std::vector<uint8_t> descriptor = GetStringDescriptor(index);
if (descriptor.size() < 2 || descriptor.size() < descriptor[0] ||
descriptor[1] != DESCRIPTOR_TYPE_STRING) {
// |descriptor| is not a valid string descriptor.
return backup;
}
size_t size = descriptor[0];
std::string encoded(reinterpret_cast<char*>(&descriptor[0]) + 2, size - 2);
std::string result;
// Unicode ECN specifies that the string is encoded in UTF-16LE.
if (!base::ConvertToUtf8AndNormalize(encoded, "utf-16le", &result))
return backup;
return result;
}
} // namespace midi
} // namespace media
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