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1 #ifndef _DEC_OP_CIRC_BUF_H_
2 #define _DEC_OP_CIRC_BUF_H_
4 #include <xdc/std.h>
5 #include "paftyp.h"
7 #define PAF_DECOP_CB_SOK ( 0 ) // ok
8 #define PAF_DECOP_CB_INIT_INV_SOURCE_SEL ( -1 ) // error: invalid source selection on init
9 #define PAF_DECOP_CB_WRITE_OVERFLOW ( -2 ) // error: write overflow
10 #define PAF_DECOP_CB_READ_UNDERFLOW ( -3 ) // error: read underflow
11 #define PAF_DECOP_CB_READ_INVSTATE ( -4 ) // error: circular buffer invalid state on read
13 #define PAF_DECOP_CB_MAX_NUM_AF ( 4 ) // decoder output circular buffer maximum number audio frames
14 #define PAF_DECOP_CB_MAX_NUM_PCM_CH ( 16 ) // decoder output circular buffer maximum number audio PCM channels
15 #define PAF_DECOP_CB_MAX_NUM_PCM_FRAMES ( 3 ) // decoder output circular buffer maximum number PCM frames //Qin - Increased to prevent cb overflow for ddp.
16 #define PAF_DECOP_CB_MAX_PCM_FRAME_LEN ( 6*256 ) // decoder output circular buffer maximum PCM frame length
17 #define PAF_DECOP_CB_PCM_BUF_SZ ( PAF_DECOP_CB_MAX_NUM_PCM_CH * PAF_DECOP_CB_MAX_NUM_PCM_FRAMES * PAF_DECOP_CB_MAX_PCM_FRAME_LEN )
19 // Decoder output circular buffer
20 typedef struct PAF_DecodeOpCircBuf {
21 PAF_AudioFrame *afCb; // audio frame CB
22 PAF_AudioData *pcmBuf; // PCM buffer, contains PCM data associated with audio frames
23 Int8 afRdIdx; // audio frame CB read index
24 Int8 afWrtIdx; // audio frame CB write index
25 Int16 pcmRdIdx; // pcm buffer read index
26 Int8 numAfCb; // current number frames in CB
27 Int8 maxNumAfCb; // maximum number of audio frames in CB
28 Int16 decOpFrameLen; // selected decoder output frame length (input transaction size)
29 Int16 strFrameLen; // stream frame length (output transaction size)
30 Int8 writerActiveFlag; // flag indicates whether CB writer is active
31 Int8 readerActiveFlag; // flag indicates whether CB reader is active
32 Int8 emptyFlag; // flag indicates whether reader should empty (drain) remaining frames in CB
33 //Int cbWriteAfInit; // indicates whether CB has been initialized for AF writes
34 } PAF_DecodeOpCircBuf;
36 // Start writes to circular buffer
37 Int cbWriteStart(
38 PAF_DecodeOpCircBuf *pCb // decoder output circular buffer
39 );
41 // Stop writes to circular buffer
42 Int cbWriteStop(
43 PAF_DecodeOpCircBuf *pCb // decoder output circular buffer
44 );
46 // Start reads from circular buffer
47 Int cbReadStart(
48 PAF_DecodeOpCircBuf *pCb // decoder output circular buffer
49 );
51 // Stop reads from circular buffer
52 Int cbReadStop(
53 PAF_DecodeOpCircBuf *pCb // decoder output circular buffer
54 );
56 // Read audio frame from circular buffer
57 Int cbReadAf(
58 PAF_DecodeOpCircBuf *pCb, // decoder output circular buffer
59 PAF_AudioFrame *pAfRd // audio frame into which to read
60 );
62 // Write audio frame to circular buffer
63 Int cbWriteAf(
64 PAF_DecodeOpCircBuf *pCb, // decoder output circular buffer
65 PAF_AudioFrame *pAfWrt // audio frame from which to write
66 );
68 // Get next audio frame to write in circular buffer
69 Int cbGetNextWriteAf(
70 PAF_DecodeOpCircBuf *pCb, // decoder output circular buffer
71 PAF_AudioFrame **ppAfWrt // audio frame next to be written
72 );
74 // Output log of circular buffer control variables (debug)
75 Int cbLog(
76 PAF_DecodeOpCircBuf *pCb,
77 Int8 fullLog
78 );
79 // restore read/write flags of the circular buffer. - QIN
80 Int cbReadWriteRestore(
81 PAF_DecodeOpCircBuf *pCb // decoder output circular buffer
82 );
84 #endif /* _DEC_OP_CIRC_BUF_H_ */