Allwinner T113 uses hard-coded JPEG in the kernel to implement boot animation

aleksib

Allwinner T113 uses hard-coded JPEG in the kernel to implement boot animation [Copy link]

 

The main implementation idea is: In the kernel, decode the jpg image through VE and display it continuously to form an animation. First, capture the video frame by frame into jpg images and package them into a binary file in a specific format. Put the resource package into a specified partition, load the resource package in the uboot stage, and tell the kernel to reserve the memory area of the resource package. **Resource package production** ``` int test_pic(int argc, char **argv) { FILE *fp_in; FILE *fp_out; int rc; char bmpfile[1024] = {0}; char path_out[1024] = {0}; int i = 0; char buffer[4096]; unsigned int length = 0; int pic_num = 100; if (argc > 3) { pic_num = atoi(argv[3]); } printf("pic_num:%d\n", pic_num); sprintf(path_out, "%s", argv[2]); printf("output:%s\n", path_out); fp_out = fopen(path_out, "wb+"); if (fp_out == NULL) { printf("Open file % s error\n", bmpfile); return (-1); } fwrite(&pic_num, 4, 1, fp_out); for (i = 0; i < pic_num; i++) { sprintf(bmpfile, "%s/1 (%d).jpg", argv[1], i + 1); fp_in = fopen(bmpfile, "rb"); if (fp_in == NULL) { printf("Open file %s error\n" , bmpfile); return (-1); } length = get_file_size(bmpfile); if (length < 1) { printf(" file %s error\n", bmpfile); return (-1); } fwrite(&length, 4, 1, fp_out); while (!feof(fp_in)) { rc = fread(buffer, 1, 1024, fp_in); if (rc < 1) print f("file %s error\n", bmpfile); fwrite(buffer, 1, rc, fp_out); } fclose(fp_in); } fclose(fp_out); return 0; } ``` Package all pictures into a binary file and name it animation.fex. The file content format is as follows: |Total number of pictures |Size of the first picture (int)| Content of the first picture |Size of the second picture (int)| Content of the second picture| And so on| | --- | --- | --- | --- | --- | --- | |int |int| char array |int |char array| . . . | Usage: ``` ./bin/demo [image path] [resource package path] [number of images] ``` For example: ``` ./bin/demo bin/Capture100/ bin/animation.fex 90 ``` Log output: ``` pic_num:90 output:bin/animation.fex ``` The production of resource packages corresponds to the format read in the kernel, and can be expanded if necessary. ** Resource package storage ** Create a new partition``` diff --git a/configs/demo2.0/longan/sys_partition.fex b/configs/demo2.0/longan/sys_partition.fex index c67aca3..1e12607 100755 --- a/configs/demo2.0/longan/sys_partition.fex +++ b/configs/demo2.0/longan/sys_partition.fex @@ -68,9 +68,9 @@ size = 16384 ;------------------------------>mmcblk0p6/nand0p6 [partition] - name = recovery - size = 231072 - ;downloadfile = "recovery.fex" + name = animation + size = 102400 + downloadfile = "animation.fex" user_type = 0x8000 ;--------------------------------->mmcblk0p7/nand0p7 diff --git a/pack b/pack index d57362b..77e7b1f 100755 --- a/pack +++ b/pack @@ -164,6 +164,7 @@ ${LICHEE_COMMON_CONFIG_DIR}/tools/cardscript.fex ${LICHEE_COMMON_CONFIG_DIR}/tools/ cardscript_secure.fex ${LICHEE_CHIP_CONFIG_DIR}/tools/cardscript.fex ${LICHEE_CHIP_CONFIG_DIR}/tools/cardscript_secure.fex +${LICHEE_CHIP_CONFIG_DIR}/tools/animation.fex ${LICHEE_COMMON_CONFIG_DIR}/tools/cardtool.fex ${LICHEE_CHIP_CONFIG_DIR}/tools/cardtool.fex ${LICHEE_COMMON_CONFIG_DIR}/tools/usbtool.fex ``` **uboot modification** Merge the patch through ``` CONFIG_ANIMATION_MEM_RESERVE ``` Control the opening and closing of the function. Read the entire partition from emmc. The larger the partition, the longer it takes. You can reduce the partition size appropriately. **kernel modification** Merge the patch through ``` CONFIG_ANIMATION_MEM_RESERVE ``` Macro enable Pay attention to the order of initialization of the codec VE and display DE driver code

bigbat

This post by the original poster is too useless. It doesn't say anything useful. For example, how to convert jpag into a format that can be used by the accelerator? What system was the system developed under? And other questions.

If you want everyone to understand, please add more code.

bigbat

Besides, Allwinner products should be used with caution in high-demand situations. And if it is not a big manufacturer, there is a high possibility that there will be a pitfall without AF.

wangerxian

Can I make a startup animation like this?

wangerxian

Is there a video of the effect? How long does it take for the boot animation to appear?