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[util]: Add frame checksum calculation function

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Add checksum calculation function and file access function for debug.
NOTE: checksum for YUV image and for luma only so far.

Change-Id: I54509bebd64f5e5143e14824733d9c25af9db204
Signed-off-by: Herman Chen <herman.chen@rock-chips.com>
This commit is contained in:
Herman Chen
2017-06-13 09:18:02 +08:00
parent c360c70be2
commit f96141033d
2 changed files with 47 additions and 0 deletions
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44
utils/utils.c
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@@ -74,3 +74,47 @@ void dump_mpp_frame_to_file(MppFrame frame, FILE *fp)
}
}
void calc_frm_checksum(MppFrame frame, RK_U8 *sum)
{
RK_U32 checksum = 0;
RK_U8 xor_mask;
RK_U32 y, x;
RK_U32 width = mpp_frame_get_width(frame);
RK_U32 height = mpp_frame_get_height(frame);
RK_U32 stride = mpp_frame_get_hor_stride(frame);
RK_U8 *buf = (RK_U8 *)mpp_buffer_get_ptr(mpp_frame_get_buffer(frame));
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
xor_mask = (x & 0xff) ^ (y & 0xff) ^ (x >> 8) ^ (y >> 8);
checksum = (checksum + ((buf[y * stride + x] & 0xff) ^ xor_mask)) & 0xffffffff;
}
}
sum[0] = (checksum >> 24) & 0xff;
sum[1] = (checksum >> 16) & 0xff;
sum[2] = (checksum >> 8) & 0xff;
sum[3] = checksum & 0xff;
}
void write_checksum(FILE *fp, RK_U8 *sum)
{
RK_S32 i;
for (i = 0; i < 16; i++)
fprintf(fp, "%02hhx", sum[i]);
fprintf(fp, "\n");
}
void read_checksum(FILE *fp, RK_U8 *sum)
{
RK_S32 i;
for (i = 0; i < 16; i++)
fscanf(fp, "%02hhx", sum + i);
fscanf(fp, "\n");
}