b889539dfd
Sony needed to increase the limit for a UVC device with > 4KiB descriptors, but there wasn't one clean place to do that. Tidy up, and also go straight to *16KiB* which was the largest buffer any copy of this code was using to date. Test: treehugger Change-Id: Ide41a217dcf4291a7d38836264f59e06967d9d91
41 lines
1.3 KiB
C++
41 lines
1.3 KiB
C++
/*
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* Copyright (C) 2022 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 <usbhost/usbhost_jni.h>
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#include "usbhost_private.h"
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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jbyteArray usb_jni_read_descriptors(JNIEnv* env, int fd) {
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if (TEMP_FAILURE_RETRY(lseek(fd, 0, SEEK_SET)) == -1) {
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ALOGE("usb_jni_read_descriptors(%d): lseek() failed: %s", fd, strerror(errno));
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return NULL;
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}
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jbyte buf[MAX_DESCRIPTORS_LENGTH];
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ssize_t n = TEMP_FAILURE_RETRY(read(fd, buf, sizeof(buf)));
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if (n == -1) {
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ALOGE("usb_jni_read_descriptors: read failed: %s", strerror(errno));
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return NULL;
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}
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jbyteArray result = env->NewByteArray(n);
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if (result) env->SetByteArrayRegion(result, 0, n, buf);
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return result;
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}
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