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确认系统中存在 /dev/rga 设备节点,该节点是RK图形加速引擎RGA,详细介绍可以看RK的介绍。
烧录RK3328 ubuntu18.04 固件到SD卡。首先,到SD Firmware Tool 下载去下载 SD_Firmware_Tool,并解压。
插入SDK,启动系统,然后更新源地址 sudo vim /etc/apt/sources.list 退出保存,终端输入: sudo apt-get update 安装rtsp依赖环境,终端输入:sh setenv.sh 编译代码,mkidr build; cmake …; make -j4 硬件解码代码: #include #include "mpp-dec.hpp" MppDec::MppDec() { recv_count = 0; dec_count = 0; } MppDec::~MppDec() { if(mdec != NULL) MppDecoderDestroy(mdec); } int MppDec::init(DecodeType type) { mdec = MppDecoderCreate(type); if(mdec == NULL) { return -1; } return 0; } int MppDec::enqueue(unsigned char *buf, size_t len) { int ret; ret = mdec->ops->enqueue(mdec, buf, len); recv_count++; return ret; } DecFrame* MppDec::dequeue(void) { DecFrame *frame = mdec->ops->dequeue_timeout(mdec, 300); if(frame != NULL) { dec_count++; } return frame; } void MppDec::freeFrame(DecFrame *frame) { mdec->ops->freeFrame(frame); } void MppDec::onStreamReceive(unsigned char *buf, size_t len) { while(enqueue(buf, len) != 0) { std::cout << "enqueue err" << std::endl; usleep(1000); } } #include #include "drm-buff.hpp" static int DrmAllocBuffer(int drm_fd, DrmBuffer *drm_buffer, int width, int height, int bpp) { struct drm_mode_create_dumb arg; int ret; memset(&arg, 0, sizeof(arg)); arg.bpp = bpp; arg.width = width; arg.height = height; ret = drmIoctl(drm_fd, DRM_IOCTL_MODE_CREATE_DUMB, &arg); if (ret) { fprintf(stderr, "failed to create dumb buffer: %sn", strerror(errno)); return ret; } drm_buffer->handle = arg.handle; drm_buffer->size = arg.size; drm_buffer->pitch = arg.pitch; return 0; } static int DrmFreeBuffer(int drm_fd, DrmBuffer *drm_buffer) { struct drm_mode_destroy_dumb arg; int ret; if (drm_buffer->handle <= 0) return -EINVAL; memset(&arg, 0, sizeof(arg)); arg.handle = drm_buffer->handle; ret = drmIoctl(drm_fd, DRM_IOCTL_MODE_DESTROY_DUMB, &arg); if (ret){ fprintf(stderr, "failed to destroy dumb buffer: %sn", strerror(errno)); return -errno; } drm_buffer->handle = 0; return 0; } int DrmGetAllocBuffer(DrmBuffer *drm_buffer, int width, int height, int bpp) { static const char* card = "/dev/dri/card0"; int ret; int drm_fd; int flag = O_RDWR; #ifdef O_CLOEXEC flag |= O_CLOEXEC; #endif drm_buffer->fd = -1; drm_buffer->handle = 0; drm_fd = open(card, flag); if (drm_fd < 0) { fprintf(stderr, "Fail to open %s: %mn", card); return -errno; } ret = DrmAllocBuffer(drm_fd, drm_buffer, width, height, bpp); if (ret) { close(drm_fd); return ret; } drm_buffer->fd = drm_fd; return 0; } int DrmGetMmap(DrmBuffer *drm_buffer) { struct drm_mode_map_dumb arg; void *map; int ret; memset(&arg, 0, sizeof(arg)); arg.handle = drm_buffer->handle; ret = drmIoctl(drm_buffer->fd, DRM_IOCTL_MODE_MAP_DUMB, &arg); if (ret) return ret; map = mmap64(0, drm_buffer->size, PROT_READ | PROT_WRITE, MAP_SHARED, drm_buffer->fd, arg.offset); if (map == MAP_FAILED) return -EINVAL; drm_buffer->ptr = map; return 0; } int DrmUnmap(DrmBuffer *drm_buffer) { munmap(drm_buffer->ptr, drm_buffer->size); drm_buffer->ptr = NULL; return 0; } int DrmFree(DrmBuffer *drm_buffer) { int ret; if (drm_buffer->fd < 0) return -EINVAL; ret = DrmFreeBuffer(drm_buffer->fd, drm_buffer); close(drm_buffer->fd); drm_buffer->fd = -1; return ret; } int DrmGetBufferFd(DrmBuffer *drm_buffer) { int ret = 0; ret = drmPrimeHandleToFD(drm_buffer->fd, drm_buffer->handle, 0, &(drm_buffer->buf_fd)); return ret; } int DrmCloseBufferFd(DrmBuffer *drm_buffer) { int ret = 0; if (drm_buffer->buf_fd < 0) return -EINVAL; ret = close(drm_buffer->buf_fd); return ret; } 实现的是解码rtsp视频,然后送到SPR5801做目标检测,支持VGG-SSD、MobileNet-SSD,支持训练自己的数据集。 |
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