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Revision 1.1, Thu Jun 3 03:14:19 2004 UTC (20 years ago) by tedu
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, OPENBSD_7_2_BASE, OPENBSD_7_2, OPENBSD_7_1_BASE, OPENBSD_7_1, OPENBSD_7_0_BASE, OPENBSD_7_0, OPENBSD_6_9_BASE, OPENBSD_6_9, OPENBSD_6_8_BASE, OPENBSD_6_8, OPENBSD_6_7_BASE, OPENBSD_6_7, OPENBSD_6_6_BASE, OPENBSD_6_6, OPENBSD_6_5_BASE, OPENBSD_6_5, OPENBSD_6_4_BASE, OPENBSD_6_4, OPENBSD_6_3_BASE, OPENBSD_6_3, OPENBSD_6_2_BASE, OPENBSD_6_2, OPENBSD_6_1_BASE, OPENBSD_6_1, OPENBSD_6_0_BASE, OPENBSD_6_0, OPENBSD_5_9_BASE, OPENBSD_5_9, OPENBSD_5_8_BASE, OPENBSD_5_8, OPENBSD_5_7_BASE, OPENBSD_5_7, OPENBSD_5_6_BASE, OPENBSD_5_6, OPENBSD_5_5_BASE, OPENBSD_5_5, OPENBSD_5_4_BASE, OPENBSD_5_4, OPENBSD_5_3_BASE, OPENBSD_5_3, OPENBSD_5_2_BASE, OPENBSD_5_2, OPENBSD_5_1_BASE, OPENBSD_5_1, OPENBSD_5_0_BASE, OPENBSD_5_0, OPENBSD_4_9_BASE, OPENBSD_4_9, OPENBSD_4_8_BASE, OPENBSD_4_8, OPENBSD_4_7_BASE, OPENBSD_4_7, OPENBSD_4_6_BASE, OPENBSD_4_6, OPENBSD_4_5_BASE, OPENBSD_4_5, OPENBSD_4_4_BASE, OPENBSD_4_4, OPENBSD_4_3_BASE, OPENBSD_4_3, OPENBSD_4_2_BASE, OPENBSD_4_2, OPENBSD_4_1_BASE, OPENBSD_4_1, OPENBSD_4_0_BASE, OPENBSD_4_0, OPENBSD_3_9_BASE, OPENBSD_3_9, OPENBSD_3_8_BASE, OPENBSD_3_8, OPENBSD_3_7_BASE, OPENBSD_3_7, OPENBSD_3_6_BASE, OPENBSD_3_6, HEAD 

merge in new magic from file 4.09.  Mostly from Bruno Rohee

#	$OpenBSD: dolby,v 1.1 2004/06/03 03:14:19 tedu Exp $

# ATSC A/53 aka AC-3 aka Dolby Digital <ashitaka@gmx.at>
# from http://www.atsc.org/standards/a_52a.pdf
# corrections, additions, etc. are always welcome!
#
# syncword
0       beshort         0x0b77  ATSC A/52 aka AC-3 aka Dolby Digital stream,
# fscod
>4      byte&0xc0       0x00    48 kHz,
>4      byte&0xc0       0x40    44.1 kHz,
>4      byte&0xc0       0x80    32 kHz,
# is this one used for 96 kHz?
>4      byte&0xc0       0xc0    reserved frequency,
#
>5	byte&7 = 0		\b, complete main (CM)
>5	byte&7 = 1		\b, music and effects (ME)
>5	byte&7 = 2		\b, visually impaired (VI)
>5	byte&7 = 3		\b, hearing impaired (HI)
>5	byte&7 = 4		\b, dialogue (D)
>5	byte&7 = 5		\b, commentary (C)
>5	byte&7 = 6		\b, emergency (E)
# acmod
>6      byte&0xe0       0x00    1+1 front,
>6      byte&0xe0       0x20    1 front/0 rear,
>6      byte&0xe0       0x40    2 front/0 rear,
>6      byte&0xe0       0x60    3 front/0 rear,
>6      byte&0xe0       0x80    2 front/1 rear,
>6      byte&0xe0       0xa0    3 front/1 rear,
>6      byte&0xe0       0xc0    2 front/2 rear,
>6      byte&0xe0       0xe0    3 front/2 rear,
# lfeon (these may be incorrect)
>7      byte&0x40       0x00    LFE off,
>7      byte&0x40       0x40    LFE on,
#
>4	byte&0x3e = 0x00	\b, 32 kbit/s
>4	byte&0x3e = 0x02        \b, 40 kbit/s
>4	byte&0x3e = 0x04        \b, 48 kbit/s
>4	byte&0x3e = 0x06        \b, 56 kbit/s
>4	byte&0x3e = 0x08        \b, 64 kbit/s
>4	byte&0x3e = 0x0a        \b, 80 kbit/s
>4	byte&0x3e = 0x0c        \b, 96 kbit/s
>4	byte&0x3e = 0x0e        \b, 112 kbit/s
>4	byte&0x3e = 0x10        \b, 128 kbit/s
>4	byte&0x3e = 0x12        \b, 160 kbit/s
>4	byte&0x3e = 0x14        \b, 192 kbit/s
>4	byte&0x3e = 0x16        \b, 224 kbit/s
>4	byte&0x3e = 0x18        \b, 256 kbit/s
>4	byte&0x3e = 0x1a        \b, 320 kbit/s
>4	byte&0x3e = 0x1c        \b, 384 kbit/s
>4	byte&0x3e = 0x1e        \b, 448 kbit/s
>4	byte&0x3e = 0x20        \b, 512 kbit/s
>4	byte&0x3e = 0x22        \b, 576 kbit/s
>4	byte&0x3e = 0x24        \b, 640 kbit/s
# dsurmod (these may be incorrect)
>6      beshort&0x0180  0x0000  Dolby Surround not indicated
>6      beshort&0x0180  0x0080  not Dolby Surround encoded
>6      beshort&0x0180  0x0100  Dolby Surround encoded
>6      beshort&0x0180  0x0180  reserved Dolby Surround mode