參數(shù)資料
型號(hào): AP77016-B04
元件分類(lèi): Codec
英文描述: uSAP77016-B04 G.723.1 Audio CODEC Middleware | User's Manual[10/2000]
中文描述: uSAP77016樓B04 g.723.1使用音頻CODEC中間件|用戶手冊(cè)[10/2000]
文件頁(yè)數(shù): 41/47頁(yè)
文件大?。?/td> 291K
代理商: AP77016-B04
APPENDIX SAMPLE PROGRAM SOURCE
User’s Manual U15152EJ2V0UM
41
sam_call.asm
(1/2)
#include "a2d_dec.h"
#include "a2d_err.h"
#include "sample.h"
public aac_dec_fillbits;
public aac_read_1word;
__USER_CALLBACK imseg
/***********************************
function
aac_read_1word
input
r2 frame size[byte]
r7 remain size
dp1 aac_input_buff read ptr
output
r0l header data
***********************************/
aac_read_1word:
r2 = r2 - 6 ; 6byte already read.
r7 = r7 srl 3 ; 0x000d then MSB, 0x0005 then Not MSB
if(r7 != 0) r2 = r2 - 1 ;
r7 = r2 & 0x0001 ;
r0 = *user_loaded_size+0:x ;
r0l = *user_loaded_size+1:x ; already loaded data size
r1 = *user_decoded_size+0:x ;
r1l = *user_decoded_size+1:x ; already decoded data size
r0 -= r1 ;
r0 -= r2 ;
if(r0 < 0) jmp _not_read ; lack of data -> jmp _not_read
r2 = r2 sra 1 ; convert byte to word
r0l = dp1 ;
r0 = r0 + r2 ;
clr(r1) ;
r1l = user_input_bs ;
r1 = r1 + INPUT_BUFSIZE ;
r1 = r1 - r0 ;
if(r1 > 0) jmp _set_ptr ;
r0 = r0 - INPUT_BUFSIZE ;
_set_ptr:
dp1 = r0l ;
nop ;
r0l = *dp1%% ;
if(r7 == 0) ret ;
r0 = r0 sll 8 ;
r2l = *dp1 ;
r2 = r2 srl 8 ;
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