return result;
}
-/*
- * This is the dumbest implementation of all -- it simply looks at
- * a fixed offset and if pack isn't there -- fails. We might want
- * to have a fallback mechanism for complete search of missing packs.
- */
static const uint8_t *dv_extract_pack(uint8_t *frame, enum dv_pack_type t)
{
int offs;
+ int c;
- switch (t) {
- case dv_audio_source:
- offs = (80 * 6 + 80 * 16 * 3 + 3);
- break;
- case dv_audio_control:
- offs = (80 * 6 + 80 * 16 * 4 + 3);
- break;
- case dv_video_control:
- offs = (80 * 5 + 48 + 5);
- break;
- case dv_timecode:
- offs = (80*1 + 3 + 3);
- break;
- default:
- return NULL;
+ for (c = 0; c < 10; c++) {
+ switch (t) {
+ case dv_audio_source:
+ if (c&1) offs = (80 * 6 + 80 * 16 * 0 + 3 + c*12000);
+ else offs = (80 * 6 + 80 * 16 * 3 + 3 + c*12000);
+ break;
+ case dv_audio_control:
+ if (c&1) offs = (80 * 6 + 80 * 16 * 1 + 3 + c*12000);
+ else offs = (80 * 6 + 80 * 16 * 4 + 3 + c*12000);
+ break;
+ case dv_video_control:
+ if (c&1) offs = (80 * 3 + 8 + c*12000);
+ else offs = (80 * 5 + 48 + 5 + c*12000);
+ break;
+ case dv_timecode:
+ offs = (80*1 + 3 + 3);
+ break;
+ default:
+ return NULL;
+ }
+ if (frame[offs] == t)
+ break;
}
return frame[offs] == t ? &frame[offs] : NULL;