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airockchip
RKMPP解码后buffer导出的fd该如何导入到rga中
我现在已经拿到MPP解码后的buffer的fd，然后使用importbuffer_virtualaddr导入mpp的buffer进行一个颜色空间转换的话没有什么问题，就是延迟太高、太慢了，所以想用importbuffer_fd的方式将MPP解码后的buffer通过fd的方式进行导入，所以我参考了rga_allocator_dma_demo.cpp这个demo去编写代码，发现导入fd也是能导入，就是进行rga颜色转换后的目标buffer获取不到，导致画面什么都不显示，以下是我编写的代码，希望能得到官方的有效回复！谢谢 ` while(1) { MppTask task = NULL;
/* poll and wait here */
int ret = mApi->poll(mCtx, MPP_PORT_OUTPUT, MPP_POLL_BLOCK);
if (ret)
{
qDebug("mpp output poll failed\n");
}
ret = mApi->dequeue(mCtx, MPP_PORT_OUTPUT, &task); /* output queue */
if (ret)
{
qDebug("mpp task output dequeue failed\n");
}
if (task)
{
MppFrame frameOut = NULL;
mpp_task_meta_get_frame(task, KEY_OUTPUT_FRAME, &frameOut);
MppBuffer buffer = NULL;
if (frameOut)
{
RK_U32 width = 0;
RK_U32 height = 0;
char *base = NULL;
width = mpp_frame_get_width(frameOut);
height = mpp_frame_get_height(frameOut);
buffer = mpp_frame_get_buffer(frameOut);
base = (char*)mpp_buffer_get_ptr(buffer);
int buffd = mpp_buffer_get_fd(buffer);//获取到MPP—buffer的fd
/* 导入FD的方式 */
int src_format;
int dst_format;
char *dst_buf;
int dst_dma_fd;
int src_buf_size, dst_buf_size;
rga_buffer_t src_img, dst_img;
rga_buffer_handle_t src_handle, dst_handle;
memset(&src_img, 0, sizeof(src_img));
memset(&dst_img, 0, sizeof(dst_img));
int src_width = MPP_ALIGN(width,16);
int src_height = MPP_ALIGN(height,16);
src_format = RK_FORMAT_YCbCr_420_SP;
int dst_width = 640;
int dst_height = 480;
dst_format = RK_FORMAT_RGB_888;
src_buf_size = src_width * src_height * get_bpp_from_format(src_format);
dst_buf_size = dst_width * dst_height * get_bpp_from_format(dst_format);
ret = dma_buf_alloc(DMA_HEAP_PATH, dst_buf_size, &dst_dma_fd, (void **)&dst_buf);
memset(dst_buf,0x33,dst_buf_size);
dma_sync_cpu_to_device(dst_dma_fd);
src_handle = importbuffer_fd(buffd, src_buf_size);
dst_handle = importbuffer_fd(dst_dma_fd, dst_buf_size);
qDebug()<<"src_mpp_fd:"<<buffd; //输出：src_mpp_fd:18
qDebug()<<"dst_dma_fd:"<<dst_dma_fd; //输出：dst_dma_fd:27
if (src_handle == 0 || dst_handle == 0) {
printf("importbuffer failed!\n");
qDebug()<<"importbuffer failed!";
goto free_buf;
}
src_img = wrapbuffer_handle(src_handle, src_width, src_height, src_format);
dst_img = wrapbuffer_handle(dst_handle, dst_width, dst_height, dst_format);
ret = imcheck(src_img, dst_img, {}, {});
if (IM_STATUS_NOERROR != ret) {
printf("%d, check error! %s", __LINE__, imStrError((IM_STATUS)ret));
return;
}
ret = imcvtcolor(src_img, dst_img,RK_FORMAT_YCbCr_420_SP,RK_FORMAT_RGB_888);
dma_sync_device_to_cpu(dst_dma_fd);
if (ret == IM_STATUS_SUCCESS) {
QImage img1((unsigned char *)dst_buf,dst_width,dst_height,QImage::Format_RGB888);
if (callback != nullptr) {
callback(img1);
}
}
else
{
printf("rga resize failed");
goto release_buffer;
}
release_buffer:
if (src_handle)
releasebuffer_handle(src_handle);
if (dst_handle)
releasebuffer_handle(dst_handle);
free_buf:
dma_buf_free(dst_buf_size, &dst_dma_fd, dst_buf);
ret = mApi->enqueue(mCtx, MPP_PORT_OUTPUT, task);
if (mpp_frame_get_eos(frameOut))
{
printf("found eos frame\n");
continue;
}
if (ret)
{
printf("mpp task output enqueue failed\n");
continue;
}
}
else
{
qDebug()<<"Error unFished decode;";
}
}
}
`
官方如需其它信息，我会尽快补充
