JpegUtil.cpp
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#include <cstdio>
#include <cstdlib>
#include <memory>
#include "JpegUtil.h"
using namespace std;
namespace DVPP_UTIL {
int32_t deviceId_;
aclrtContext context_;
aclrtStream stream_;
acldvppChannelDesc *dvppChannelDesc_;
int dvpp_jpeg_init(int32_t devId){
deviceId_ = devId;
aclError ret;
/* 2.Run the management resource application, including Device, Context, Stream */
aclrtSetDevice(deviceId_);
aclrtCreateContext(&context_, deviceId_);
aclrtCreateStream(&stream_);
// channel 准备
dvppChannelDesc_ = acldvppCreateChannelDesc();
ret = acldvppCreateChannel(dvppChannelDesc_);
}
void dvpp_jpeg_release(){
aclError ret;
ret = aclrtSetDevice(deviceId_);
aclrtSetCurrentContext(context_);
ret = acldvppDestroyChannel(dvppChannelDesc_);
ret = acldvppDestroyChannelDesc(dvppChannelDesc_);
dvppChannelDesc_ = nullptr;
if (stream_ != nullptr) {
ret = aclrtDestroyStream(stream_);
if (ret != ACL_SUCCESS) {
printf("destroy stream failed");
}
stream_ = nullptr;
}
printf("end to destroy stream");
if (context_ != nullptr) {
ret = aclrtDestroyContext(context_);
if (ret != ACL_SUCCESS) {
printf("destroy context failed");
}
context_ = nullptr;
}
printf("end to destroy context");
ret = aclrtResetDevice(deviceId_);
if (ret != ACL_SUCCESS) {
printf("reset device failed");
}
printf("end to reset device is %d", deviceId_);
}
int32_t dvpp_jpege_save(char* pcData , uint32_t dataLen, string out_file_name)
{
FILE* fd = nullptr;
fd = fopen(out_file_name.c_str(), "wb");
if (fd == nullptr) {
printf("open output file err\n");
return 1;
}
fwrite(pcData, dataLen, 1, fd);
fflush(fd);
fclose(fd);
return 0;
}
void dvpp_jpeg_encode(acldvppPicDesc *encodeInputDesc_, string out_file_name){
aclError aclRet ;
aclRet = aclrtSetDevice(deviceId_);
aclrtSetCurrentContext(context_);
// 7. 创建图片编码配置数据，设置编码质量
// 编码质量范围[0, 100]，其中level 0编码质量与level 100差不多，而在[1, 100]内数值越小输出图片质量越差。
acldvppJpegeConfig *jpegeConfig_ = acldvppCreateJpegeConfig();
acldvppSetJpegeConfigLevel(jpegeConfig_, 100);
// 8. 申请输出内存，申请Device内存encodeOutBufferDev_,存放编码后的输出数据
uint32_t outBufferSize= 0;
int ret = acldvppJpegPredictEncSize(encodeInputDesc_, jpegeConfig_, &outBufferSize);
void *encodeOutBufferDev_ = nullptr;
ret = acldvppMalloc(&encodeOutBufferDev_, outBufferSize);
// 9. 执行异步编码，再调用aclrtSynchronizeStream接口阻塞程序运行，直到指定Stream中的所有任务都完成
aclRet = acldvppJpegEncodeAsync(dvppChannelDesc_, encodeInputDesc_, encodeOutBufferDev_, &outBufferSize, jpegeConfig_, stream_);
aclRet = aclrtSynchronizeStream(stream_);
// 该模式下，由于处理结果在Device侧，因此需要调用内存复制接口传输结果数据后，再释放Device侧内存
// 申请Host内存outputHostBuffer
void* outputHostBuffer = malloc(outBufferSize);
// 通过aclrtMemcpy接口将Device的处理结果数据传输到Host
aclRet = aclrtMemcpy(outputHostBuffer, outBufferSize, encodeOutBufferDev_, outBufferSize, ACL_MEMCPY_DEVICE_TO_HOST);
// 释放掉输入输出的device内存
(void)acldvppFree(encodeOutBufferDev_);
encodeOutBufferDev_ = nullptr;
// 数据使用完成后，释放内存
dvpp_jpege_save((char*)outputHostBuffer, outBufferSize, out_file_name);
free(outputHostBuffer);
outputHostBuffer = nullptr;
}
}