diff options
Diffstat (limited to 'libpsn00b/psxpress')
| -rw-r--r-- | libpsn00b/psxpress/vlc2.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/libpsn00b/psxpress/vlc2.c b/libpsn00b/psxpress/vlc2.c index 24c54ce..7d9d9f3 100644 --- a/libpsn00b/psxpress/vlc2.c +++ b/libpsn00b/psxpress/vlc2.c @@ -123,7 +123,7 @@ int __attribute__((optimize(3))) DecDCTvlcContinue2( *output = (uint16_t) _get_bits_unsigned(22); _advance_window(22); } else if (window >> 24) { - // The first lookup table is for codes that not start with + // The first lookup table is for codes that do not start with // 00000000. value = _vlc_huffman_table2->ac[_get_bits_unsigned(13)]; _advance_window(value >> 16); @@ -136,12 +136,9 @@ int __attribute__((optimize(3))) DecDCTvlcContinue2( *output = (uint16_t) value; } } else { - // Parse the DC (first) coefficient for this block. Version 2 - // simply stores the signed 10-bit value as-is, while version 3 - // uses a delta encoding combined with a compression method similar - // to exp-Golomb. + // Parse the DC (first) coefficient for this block. if (is_v3) { - // TODO: version 3 is currently not supported. + // This implementation does not support version 3. return -1; } else { value = _get_bits_unsigned(10); @@ -161,7 +158,7 @@ int __attribute__((optimize(3))) DecDCTvlcContinue2( // time and processes each 16-bit word starting from the the MSB, so an // endianness conversion is necessary to preserve bit order when // reading 32 bits at a time. Also note that the PS1 CPU is not capable - // of shifting by more than 31 bits - it will shift by 0 bits instead! + // of shifting by >=31 bits - it will shift by (N % 32) bits instead! if (bit_offset < 0) { window = next_window << (-bit_offset); bit_offset += 32; |