REVISION
Definition in file DECODER__wma.c.
#include "../SYSTEM/sys_hardware.h"
#include "../MESSAGE/message.h"
#include "../codec/codec.h"
#include "../coder/coder.h"
#include "../TISTD/wma_ti.h"
#include "decoder.h"
Include dependency graph for DECODER__wma.c:
Go to the source code of this file.
Functions | |
| BOOL | DECODER__wma (void) |
| Function serves as the WMA decoder data output task handle. | |
| BOOL | DECODER__wmatask (void) |
| Function serves as the WMA decoder task handle. | |
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Function serves as the WMA decoder data output task handle.
Definition at line 61 of file DECODER__wma.c. References Audio, st_DECODER::averageWordRate, st_DECODER::decode, st_DECODER::decodeBitstrm, Decoder, st_DECODER::decrypt, st_DECODER::firstPacketOffset, st_DECODER::flag, st_DECODER::inputBitstrm, st_DECODER::pipe, PIPE_writeNext(), st_AUDIO::playtime, SAUDIOTIME_UPDT, and st_DECODER::status. 00062 {
00063 PIPE_Obj * pipe = &Decoder.pipe;
00064 int error = DECODE_NO_ERROR;
00065 ULONG tmpUL;
00066
00067 // Try to decode as long as output pipe is open.
00068 while( PIPE_writeFrameNum(pipe) )
00069 {
00070 if ( Decoder.flag & (DEC_FFWD|DEC_FRWD) )
00071 {
00072 if(0== SEM_count(SEM_subcoder)) SEM_post(SEM_subcoder);
00073 }
00074
00075 error = DECODE_decode( Decoder.decode,
00076 Decoder.decodeBitstrm,
00077 (Int *)pipe->WrFrame.Frame );
00078 DECODE_getStatus(Decoder.decode, &Decoder.status);
00079
00080 if (error == DECODE_NO_ERROR)
00081 {
00082 // no error, so output the data, prepare for the next write as well.
00083 PIPE_writeNext(pipe);
00084
00085 //if ( Decoder.status.bitRate )
00086 if(Decoder.averageWordRate)
00087 {
00088 // (wordsize*2)/(bitrate/8)
00089 //tmpUL = (wmadecode.startOfDataFileAdr-FIRST_PACKET_OFFSET)
00090 // /(Decoder.status.bitRate>>4);
00091 tmpUL = 0;
00092 if(wmadecode.startOfDataFileAdr > Decoder.firstPacketOffset)
00093 tmpUL = (wmadecode.startOfDataFileAdr-Decoder.firstPacketOffset)/
00094 Decoder.averageWordRate;
00095 if ( Audio.playtime != tmpUL )
00096 {
00097 Audio.playtime = tmpUL;
00098 mMSG_send(sysMsgQ, SYS_MSG_ID, SAUDIOTIME_UPDT, DONTCARE, 0);
00099 }
00100 }
00101
00102 }
00103 else if(error == DECODE_ERROR)
00104 {
00105 // Error, resync on the next call. Note that the output
00106 // pipe frame is kept for next decoding attempt.
00107 SCRYPT_reset(Decoder.decrypt);
00108 DECODE_reset(Decoder.decode);
00109 BITSTRM_reset(Decoder.inputBitstrm);
00110 }
00111 else if(error == DECODE_NO_DATA)
00112 {
00113 if(0 == SEM_count(SEM_subcoder)) SEM_post(SEM_subcoder);
00114 break;
00115 }
00116 }
00117
00118 return TRUE;
00119 }
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Function serves as the WMA decoder task handle.
Definition at line 129 of file DECODER__wma.c. References Audio, st_DECODER::decodeBitstrm, Decoder, st_DECODER::flag, and st_AUDIO::offset. Referenced by DECODER__wmainit(). 00130 {
00131 // Try to decode as long as output buffer is available.
00132 while( sramPP_isWritable( &SRAMPP ) )
00133 {
00134 BITSTRM_pack(Decoder.decodeBitstrm);
00135 if ( Decoder.flag & (DEC_FFWD|DEC_MEDIASEEK) )
00136 {
00137 seekMode = 1;
00138 if(Decoder.flag & DEC_MEDIASEEK)
00139 {
00140 g_ErrorRetryPos = Audio.offset<<1;
00141 Decoder.flag &= ~DEC_MEDIASEEK;
00142 }
00143 else g_ErrorRetryPos += wmaFastFwdLen;
00144 Decoder.flag &= ~DEC_FFWD;
00145 }
00146 else if ( Decoder.flag & DEC_FRWD )
00147 {
00148 seekMode = -1;
00149 g_ErrorRetryPos -= wmaFastFwdLen;
00150 Decoder.flag &= ~DEC_FRWD;
00151 }
00152 WMA_task();
00153 }
00154 BITSTRM_pack(Decoder.decodeBitstrm);
00155 return TRUE;
00156
00157 }
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1.3.9.1