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// SPDX-License-Identifier: MIT
#include "hdmi.h"
void pack_hdmi_infoframe(struct packed_hdmi_infoframe *packed_frame,
u8 *raw_frame, ssize_t len)
{
u32 header = 0;
u32 subpack0_low = 0;
u32 subpack0_high = 0;
u32 subpack1_low = 0;
u32 subpack1_high = 0;
switch (len) {
/*
* "When in doubt, use brute force."
* -- Ken Thompson.
*/
default:
/*
* We presume that no valid frame is longer than 17
* octets, including header... And truncate to that
* if it's longer.
*/
case 17:
subpack1_high = (raw_frame[16] << 16);
fallthrough;
case 16:
subpack1_high |= (raw_frame[15] << 8);
fallthrough;
case 15:
subpack1_high |= raw_frame[14];
fallthrough;
case 14:
subpack1_low = (raw_frame[13] << 24);
fallthrough;
case 13:
subpack1_low |= (raw_frame[12] << 16);
fallthrough;
case 12:
subpack1_low |= (raw_frame[11] << 8);
fallthrough;
case 11:
subpack1_low |= raw_frame[10];
fallthrough;
case 10:
subpack0_high = (raw_frame[9] << 16);
fallthrough;
case 9:
subpack0_high |= (raw_frame[8] << 8);
fallthrough;
case 8:
subpack0_high |= raw_frame[7];
fallthrough;
case 7:
subpack0_low = (raw_frame[6] << 24);
fallthrough;
case 6:
subpack0_low |= (raw_frame[5] << 16);
fallthrough;
case 5:
subpack0_low |= (raw_frame[4] << 8);
fallthrough;
case 4:
subpack0_low |= raw_frame[3];
fallthrough;
case 3:
header = (raw_frame[2] << 16);
fallthrough;
case 2:
header |= (raw_frame[1] << 8);
fallthrough;
case 1:
header |= raw_frame[0];
fallthrough;
case 0:
break;
}
packed_frame->header = header;
packed_frame->subpack0_low = subpack0_low;
packed_frame->subpack0_high = subpack0_high;
packed_frame->subpack1_low = subpack1_low;
packed_frame->subpack1_high = subpack1_high;
}
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