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 /*********************************************************************************/
19 /* ------------------------------------------------------------------- */
20 /* MPEG-4 Util: AudioHintSample */
21 /* ------------------------------------------------------------------- */
22 /*********************************************************************************/
23 /*
24 This DecoderSpecificInfo Class that holds the Mpeg4 VOL header for the
25 video stream
26 */
27
28 #define __IMPLEMENT_AMRDecoderSpecificInfo__
29
30 #include "amrdecoderspecificinfo.h"
31
32 #include "atom.h"
33 #include "atomutils.h"
34
35 // Default constructor
AMRDecoderSpecificInfo(MP4_FF_FILE * fp,bool o3GPPTrack)36 AMRDecoderSpecificInfo::AMRDecoderSpecificInfo(MP4_FF_FILE *fp, bool o3GPPTrack)
37 : DecoderSpecificInfo(fp, o3GPPTrack, false)
38 {
39 _VendorCode = 0;
40 _codec_version = 0;
41 _band_mode = 0;
42 _frame_type = 0xFF;
43 _mode_set = 0;
44 _mode_change_period = 0;
45 _frames_per_sample = 0;
46 _mode_change_neighbour = 0;
47
48 if (o3GPPTrack)
49 {
50 }
51 else
52 {
53 AtomUtils::read32(fp, _VendorCode);
54
55 AtomUtils::read8(fp, _codec_version);
56
57 AtomUtils::read8(fp, _frame_type);
58
59 AtomUtils::read16(fp, _mode_set);
60
61 uint8 data = 0;
62
63 AtomUtils::read8(fp, data);
64
65 if (data & 0x01)
66 {
67 _mode_change_neighbour = true;
68 }
69
70 _mode_change_period = (uint8)((data >> 1) & 0x7F);
71
72 AtomUtils::read8(fp, data);
73 AtomUtils::read8(fp, data);
74 AtomUtils::read8(fp, data);
75 }
76 }
77
78
79