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显示屏实验-显示不同分辨率图像

硬件要求：

  • DshanPI-CanMV开发板
  • Type-C数据线 x2
  • MIPI显示屏/HDMI显示屏

开发环境：

  • Ubuntu20.04

配套源码：https://pan.baidu.com/s/1VBd0n3FKO0bj8yHOWk4HEw?pwd=ov5d 提取码：ov5d

具体位置： 12_多媒体应用示例源码\05_sample_vo*

1.修改源码​

1.1 修改申请内存大小​

#define PRIVATE_POLL_SZE                        (480 * 800 * 4) + (1024 * 4)
#define PRIVATE_POLL_NUM                        (4)

1.2 修改图像路径​

#define CONNECTOR_OSD_TEST_PICTURE        "disney_480x800_argb8888.yuv"

1.3 修改叠加的位置和大小​

    osd.act_size.width = 480;
    osd.act_size.height = 800;
    osd.offset.x = 0;
    osd.offset.y = 0;

1.4 读取图像文件​

    void *read_addr = NULL;
    FILE *fd;
    int ret = 0;
    k_u32 read_size = osd.size;

    read_addr = malloc(read_size);
    if (!read_addr)
    {
        printf("alloc read addr failed\n");
    }
    // add picture
    fd = fopen(CONNECTOR_OSD_TEST_PICTURE, "rb");
    // get output image
    ret = fread(read_addr, read_size, 1, fd);
    if (ret <= 0)
    {
        printf("fread  picture_addr is failed ret is %d \n", ret);
    }
    memcpy(pic_vaddr, read_addr, read_size);

2.运行及效果​

将显示的图像传输至开发板

adb push disney_480x800_argb8888.yuv /sharefs/app

传输完成后运行对应示例：

image-20241024114731099