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/Avc/avcdec_int.h

http://github.com/mbebenita/Broadway
C Header | 88 lines | 33 code | 13 blank | 42 comment | 0 complexity | 7ac023d23baef57d40415e96bc0b9f80 MD5 | raw file
 1/* ------------------------------------------------------------------
 2 * Copyright (C) 1998-2009 PacketVideo
 3 *
 4 * Licensed under the Apache License, Version 2.0 (the "License");
 5 * you may not use this file except in compliance with the License.
 6 * You may obtain a copy of the License at
 7 *
 8 *      http://www.apache.org/licenses/LICENSE-2.0
 9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
13 * express or implied.
14 * See the License for the specific language governing permissions
15 * and limitations under the License.
16 * -------------------------------------------------------------------
17 */
18/**
19This file contains application function interfaces to the AVC decoder library
20and necessary type defitionitions and enumerations.
21Naming convention for variables:
22lower_case_with_under_line  is  syntax element in subclause 7.2 and 7.3
23noUnderLine or NoUnderLine  is  derived variables defined somewhere else in the draft
24                                or introduced by this decoder library.
25@publishedAll
26*/
27
28#ifndef _AVCDEC_INT_H_
29#define _AVCDEC_INT_H_
30
31#include "avcint_common.h"
32#include "avcdec_api.h"
33
34
35/**
36Bitstream structure contains bitstream related parameters such as the pointer
37to the buffer, the current byte position and bit position.
38@publishedAll
39*/
40typedef struct tagDecBitstream
41{
42    uint8 *bitstreamBuffer; /* pointer to buffer memory   */
43    int nal_size;       /* size of the current NAL unit */
44    int data_end_pos;  /* bitstreamBuffer size in bytes */
45    int read_pos;       /* next position to read from bitstreamBuffer  */
46    uint curr_word; /* byte-swapped (MSB left) current word read from buffer */
47    int bit_left;      /* number of bit left in current_word */
48    uint next_word;     /* in case for old data in previous buffer hasn't been flushed. */
49    int incnt;  /* bit left in the prev_word */
50    int incnt_next;
51    int bitcnt;
52    void *userData;
53} AVCDecBitstream;
54
55/**
56This structure is the main object for AVC decoder library providing access to all
57global variables. It is allocated at PVAVCInitDecoder and freed at PVAVCCleanUpDecoder.
58@publishedAll
59*/
60typedef struct tagDecObject
61{
62
63    AVCCommonObj *common;
64
65    AVCDecBitstream     *bitstream; /* for current NAL */
66
67    /* sequence parameter set */
68    AVCSeqParamSet *seqParams[32]; /* Array of pointers, get allocated at arrival of new seq_id */
69
70    /* picture parameter set */
71    AVCPicParamSet *picParams[256]; /* Array of pointers to picture param set structures */
72
73    /* For internal operation, scratch memory for MV, prediction, transform, etc.*/
74    uint    ref_idx_l0[4]; /* [mbPartIdx], te(v) */
75    uint    ref_idx_l1[4];
76
77    /* function pointers */
78    AVCDec_Status(*residual_block)(struct tagDecObject*, int,  int,
79                                   int *, int *, int *);
80    /* Application control data */
81    AVCHandle *avcHandle;
82    void (*AVC_DebugLog)(AVCLogType type, char *string1, char *string2);
83    /*bool*/
84    uint    debugEnable;
85
86} AVCDecObject;
87
88#endif /* _AVCDEC_INT_H_ */