Data Sheet

PRELIMINARY
VS1063a Datasheet
10 OPERATION
10.11.9 Other Parameters
WMA
Parameter Address Usage
curPacketSize 0x1e2a/2b The size of the packet being processed
packetSize 0x1e2c/2d The packet size in ASF header
The ASF header packet size is available in . With this information and a packet
start offset from you can parse the packet headers and skip packets in ASF files.
WMA decoder can also increase the internal clock automatically when it detects that a file can
not be decoded correctly with the current clock. The maximum allowed clock is configured with
the SCI_CLOCKF register.
AAC
Parameter Address Usage
config1 0x1e03(7:4) SBR and PS select
sceFoundMask 0x1e2a Single channel elements found
cpeFoundMask 0x1e2b Channel pair elements found
lfeFoundMask 0x1e2c Low frequency elements found
playSelect 0x1e2d Play element selection
dynCompress 0x1e2e Compress coefficient for DRC, -8192=1.0
dynBoost 0x1e2f Boost coefficient for DRC, 8192=1.0
sbrAndPsStatus 0x1e30 SBR and PS available flags
sbrAndPsFlags 0x1e31 SBR and PS mode
determines which element to decode if a stream has multiple elements. The value
is set to 0 each time AAC decoding starts, which causes the first element that appears in the
stream to be selected for decoding. Other values are: 0x01 - select first single channel element
(SCE), 0x02 - select first channel pair element (CPE), 0x03 - select first low frequency element
(LFE), S ∗ 16 + 5 - select SCE number S, P ∗ 16 + 6 - select CPE number P, L ∗ 16 + 7 -
select LFE number L. When automatic selection has been performed, reflects the
selected element.
, , and indicate which elements have been found in
an AAC stream since the variables have last been cleared. The values can be used to present
an element selection menu with only the available elements.
and change the behavior of the dynamic range control (DRC) that is
present in some AAC streams. These are also initialized when AAC decoding starts.
indicates spectral band replication (SBR) and parametric stereo (PS) status.
Version: 0.42, 2011-11-24 73