參數(shù)資料
型號: AP77016-B06
元件分類: Codec
英文描述: USAP77016-B06 AMR Speech Codec Middleware | User's Manual[06/2002]
中文描述: USAP77016 - B06 AMR語音編解碼中間件|用戶手冊[06/2002]
文件頁數(shù): 23/47頁
文件大?。?/td> 291K
代理商: AP77016-B06
CHAPTER 2 LIBRARY SPECIFICATIONS
User
s Manual U15152EJ2V0UM
23
2.2.3 a2d_Dec function
[Classification]
[Function name]
[Summary of function]
Executes AAC decoding and obtains result of decoding
[Format]
call a2d_Dec
[Arguments]
R0
0: Decode RAW_DATA only
1: Decode ADIF
2: Decode ADTS
R1
0: Perform normal decoding
1: Skip decoding for one frame
DP0
Pointer to PCM data output area (see
Figure 2-2
)
[Return value]
R0
0: Error
Other than 0: Normal
[Function]
Perform decoding in the mode specified in R0 and obtain a 2048-word decoding result.
Output the decoding result in the output buffer specified in DP0.
[Registers used]
R0, R1, R2, R3, R4, R5, R6, R7, DP0, DP1, DP2, DP3, DP4, DP5, DP6, DP7, DN0, DN1,
DN2, DN3, DN4, DN5, DN6, DN7, DMX, DMY
[Hardware resourcement]
Maximum stack level
6
Maximum loop stack level
4
Maximum number of repeats
176 (Measured maximum value)
Maximum MIPS value
31 MIPS (If there is no error encoding)
31.5 MIPS (If there is error encoding)
AAC decoder processing
a2d_Dec
Figure 2-2. User-Defined Output Buffer
Pointer to output
buffer: DP0
L
R
Buffer size
= 2048 words (fixed)
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