1 /* |
|
2 * Copyright (c) 2010 Ixonos Plc. |
|
3 * All rights reserved. |
|
4 * This component and the accompanying materials are made available |
|
5 * under the terms of the "Eclipse Public License v1.0" |
|
6 * which accompanies this distribution, and is available |
|
7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
8 * |
|
9 * Initial Contributors: |
|
10 * Nokia Corporation - Initial contribution |
|
11 * |
|
12 * Contributors: |
|
13 * Ixonos Plc |
|
14 * |
|
15 * Description: |
|
16 * |
|
17 */ |
|
18 |
|
19 |
|
20 |
|
21 #ifndef _MP3API_ |
|
22 #define _MP3API_ |
|
23 |
|
24 |
|
25 #include "defines.h" |
|
26 #include "mstream.h" |
|
27 |
|
28 |
|
29 |
|
30 |
|
31 |
|
32 /* |
|
33 Purpose: Structure interface for MP1/2/3 transport stream. |
|
34 Explanation: - */ |
|
35 class TMpTransportHandle |
|
36 { |
|
37 public: |
|
38 |
|
39 TMPEG_Header header; |
|
40 TMPEG_Header headerOld; |
|
41 |
|
42 int16 SlotTable[15]; |
|
43 int16 FreeFormatSlots; /*-- Number of bytes in free format frame. */ |
|
44 |
|
45 int16 mainDataSlots; /*-- Payload size. */ |
|
46 |
|
47 BOOL ms_stereo; /* MS (Mid/Side) stereo used. */ |
|
48 BOOL is_stereo; /* Intensity stereo used. */ |
|
49 BOOL lsf; /* MPEG-2 LSF stream present. */ |
|
50 BOOL mpeg25; /* MPEG-2.5 stream present. */ |
|
51 |
|
52 /*-- Transport stream to be used/in use. --*/ |
|
53 SYNC_STATUS transportType; |
|
54 SyncInfo syncInfo; |
|
55 |
|
56 /*-- Exec state when seeking next MPx frame. --*/ |
|
57 int16 offsetBits; |
|
58 ExecState execState; |
|
59 |
|
60 /*-- CRC codeword. --*/ |
|
61 TCRC_Check crc; |
|
62 |
|
63 /*-- Average number of bytes reserved for each frame. --*/ |
|
64 int32 aveFrameLen; |
|
65 |
|
66 }; |
|
67 |
|
68 |
|
69 /** |
|
70 * Data structure for mp3 frame search. |
|
71 */ |
|
72 class TMpFrameState |
|
73 { |
|
74 public: |
|
75 /** |
|
76 * Number of read bytes when searching start of frame. |
|
77 * This value is within the input buffer and also the header |
|
78 * is read after start of frame has been found. |
|
79 */ |
|
80 int16 readBytes; |
|
81 |
|
82 /** |
|
83 * Number of header bytes present for current MP3 frame. |
|
84 */ |
|
85 int16 headerBytes; |
|
86 |
|
87 /** |
|
88 * Number of payload bytes for current MP3 frame. The total frame |
|
89 * size is 'headerBytes' + 'frameBytes'. |
|
90 */ |
|
91 int16 frameBytes; |
|
92 |
|
93 /** |
|
94 * Total number of bytes read when searching the start of frame. |
|
95 */ |
|
96 int32 totalReadBytes; |
|
97 |
|
98 }; |
|
99 |
|
100 |
|
101 |
|
102 |
|
103 /* |
|
104 Purpose: Parameters of core engine. |
|
105 Explanation: - */ |
|
106 class CMPAudDec : public CBase |
|
107 { |
|
108 public: |
|
109 |
|
110 IMPORT_C static CMPAudDec* NewL(); |
|
111 IMPORT_C ~CMPAudDec(); |
|
112 IMPORT_C void Init(TMpTransportHandle *aMpFileFormat); |
|
113 |
|
114 /*-- Common to all layers. --*/ |
|
115 uint8 *bitReserv; |
|
116 TMPEG_Frame *frame; |
|
117 |
|
118 /*-- Layer III specific parameters. --*/ |
|
119 TBitStream br; |
|
120 CHuffman *huffman; |
|
121 CIII_Side_Info *side_info; |
|
122 |
|
123 int16 PrevSlots; |
|
124 //int32 FrameStart; |
|
125 BOOL SkipBr; |
|
126 BOOL WasSeeking; |
|
127 |
|
128 /*-- Transport handle. --*/ |
|
129 TMpTransportHandle *mpFileFormat; |
|
130 |
|
131 |
|
132 private: |
|
133 |
|
134 CMPAudDec(); |
|
135 void ConstructL(); |
|
136 |
|
137 }; |
|
138 |
|
139 class CMp3Edit : public CBase |
|
140 { |
|
141 |
|
142 public: |
|
143 |
|
144 IMPORT_C static CMp3Edit* NewL(); |
|
145 IMPORT_C ~CMp3Edit(); |
|
146 |
|
147 IMPORT_C uint32 |
|
148 FileLengthInMs(TMpTransportHandle *tHandle, int32 fileSize) const; |
|
149 |
|
150 IMPORT_C int32 |
|
151 GetSeekOffset(TMpTransportHandle *tHandle, int32 seekPos) const; |
|
152 |
|
153 IMPORT_C int32 |
|
154 GetFrameTime(TMpTransportHandle *tHandle) const; |
|
155 |
|
156 IMPORT_C void |
|
157 InitTransport(TMpTransportHandle *tHandle) const; |
|
158 |
|
159 IMPORT_C int16 |
|
160 SeekSync(TMpTransportHandle *tHandle, uint8 *syncBuf, |
|
161 uint32 syncBufLen, int16 *readBytes, |
|
162 int16 *frameBytes, int16 *headerBytes, |
|
163 uint8 initMode) const; |
|
164 |
|
165 IMPORT_C int16 |
|
166 FreeMode(TMpTransportHandle *tHandle, uint8 *syncBuf, |
|
167 uint32 syncBufLen, int16 *readBytes, |
|
168 int16 *frameBytes, int16 *headerBytes) const; |
|
169 |
|
170 IMPORT_C int16 |
|
171 EstimateBitrate(TMpTransportHandle *tHandle, uint8 isVbr) const; |
|
172 |
|
173 |
|
174 |
|
175 |
|
176 /*-- Closes MPEG Layer I/II/III decoder handle. --*/ |
|
177 IMPORT_C CMPAudDec * |
|
178 DeleteMPAudDec(CMPAudDec *mpAud); |
|
179 |
|
180 /*-- Creates MPEG Layer I/II/III decoder handle. --*/ |
|
181 IMPORT_C CMPAudDec * |
|
182 CreateMPAudDec(void); |
|
183 |
|
184 /*-- Initializes MPEG Layer I/II/III decoder handle. --*/ |
|
185 IMPORT_C void |
|
186 InitMPAudDec(CMPAudDec *mpAud, TMpTransportHandle *mpFileFormat); |
|
187 |
|
188 /*-- Resets MPEG Layer I/II/III decoder handle. --*/ |
|
189 IMPORT_C void |
|
190 ResetMPAudDec(CMPAudDec *mpAud); |
|
191 |
|
192 /*-- Stores global gain values. --*/ |
|
193 IMPORT_C void |
|
194 SetMPGlobalGains(TBitStream *bs, uint8 numGains, uint8 *globalGain, uint32 *gainPos); |
|
195 |
|
196 /*-- Extracts global gain values. --*/ |
|
197 IMPORT_C uint8 |
|
198 GetMPGlobalGains(TBitStream *bs, TMpTransportHandle *tHandle, uint8 *globalGain, uint32 *gainPos); |
|
199 |
|
200 private: |
|
201 |
|
202 void ConstructL(); |
|
203 CMp3Edit(); |
|
204 |
|
205 }; |
|
206 |
|
207 |
|
208 #endif |
|