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[wxWidgets.git] / utils / wxMMedia2 / lib / sndaiff.cpp
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1// --------------------------------------------------------------------------
2// Name: sndaiff.cpp
3// Purpose:
4// Date: 08/11/1999
5// Author: Guilhem Lavaux <lavaux@easynet.fr> (C) 1999
6// CVSID: $Id$
7// --------------------------------------------------------------------------
8#ifdef __GNUG__
9#pragma implementation "sndaiff.cpp"
10#endif
11
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12#include <wx/wxprec.h>
13
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14#include <wx/stream.h>
15#include <wx/datstrm.h>
16#include <wx/filefn.h>
17#include "sndbase.h"
18#include "sndcodec.h"
19#include "sndfile.h"
20#include "sndpcm.h"
21#include "sndaiff.h"
22
23#define BUILD_SIGNATURE(a,b,c,d) (((wxUint32)a) | (((wxUint32)b) << 8) | (((wxUint32)c) << 16) | (((wxUint32)d) << 24))
24
25#define FORM_SIGNATURE BUILD_SIGNATURE('F','O','R','M')
26#define AIFF_SIGNATURE BUILD_SIGNATURE('A','I','F','F')
27#define AIFC_SIGNATURE BUILD_SIGNATURE('A','I','F','C')
28#define COMM_SIGNATURE BUILD_SIGNATURE('C','O','M','M')
29#define SSND_SIGNATURE BUILD_SIGNATURE('S','S','N','D')
30
31wxSoundAiff::wxSoundAiff(wxInputStream& stream, wxSoundStream& io_sound)
32 : wxSoundFileStream(stream, io_sound)
33{
34}
35
36wxSoundAiff::wxSoundAiff(wxOutputStream& stream, wxSoundStream& io_sound)
37 : wxSoundFileStream(stream, io_sound)
38{
39}
40
41wxSoundAiff::~wxSoundAiff()
42{
43}
44
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45bool wxSoundAiff::CanRead()
46{
47 wxUint32 signature1, signature2, len;
48
49 if (m_input->Read(&signature1, 4).LastRead() != 4)
50 return FALSE;
51
52 if (wxUINT32_SWAP_ON_BE(signature1) != FORM_SIGNATURE) {
53 m_input->Ungetch(&signature1, 4);
54 return FALSE;
55 }
56
57 m_input->Read(&len, 4);
58 if (m_input->LastRead() != 4) {
59 m_input->Ungetch(&len, m_input->LastRead());
60 m_input->Ungetch(&signature1, 4);
61 return FALSE;
62 }
63
64 if (m_input->Read(&signature2, 4).LastRead() != 4) {
65 m_input->Ungetch(&signature2, m_input->LastRead());
66 m_input->Ungetch(&len, 4);
67 m_input->Ungetch(&signature1, 4);
68 return FALSE;
69 }
70
71 m_input->Ungetch(&signature2, 4);
72 m_input->Ungetch(&len, 4);
73 m_input->Ungetch(&signature1, 4);
74
75 if (
76 wxUINT32_SWAP_ON_BE(signature2) != AIFF_SIGNATURE &&
77 wxUINT32_SWAP_ON_BE(signature2) != AIFC_SIGNATURE)
78 return FALSE;
79
80 return TRUE;
81}
82
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83#define FAIL_WITH(condition, err) if (condition) { m_snderror = err; return FALSE; }
84
85bool wxSoundAiff::PrepareToPlay()
86{
87 wxDataInputStream data(*m_input);
88 wxUint32 signature, len, ssnd;
89 bool end_headers;
90
91 if (!m_input) {
92 m_snderror = wxSOUND_INVSTRM;
93 return FALSE;
94 }
95
96 data.BigEndianOrdered(TRUE);
97
98 FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
99 FAIL_WITH(wxUINT32_SWAP_ON_BE(signature) != FORM_SIGNATURE, wxSOUND_INVSTRM);
100 // "FORM"
101
102 len = data.Read32();
103 FAIL_WITH(m_input->LastRead() != 4, wxSOUND_INVSTRM);
104 // dummy len
105
106 FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
107 FAIL_WITH(
108 wxUINT32_SWAP_ON_BE(signature) != AIFF_SIGNATURE &&
109 wxUINT32_SWAP_ON_BE(signature) != AIFC_SIGNATURE, wxSOUND_INVSTRM);
110 // "AIFF" / "AIFC"
111
112 end_headers = FALSE;
113 while (!end_headers) {
114 FAIL_WITH(m_input->Read(&signature, 4).LastRead() != 4, wxSOUND_INVSTRM);
115
116 len = data.Read32();
117 FAIL_WITH(m_input->LastRead() != 4, wxSOUND_INVSTRM);
118
119 switch (wxUINT32_SWAP_ON_BE(signature)) {
120 case COMM_SIGNATURE: { // "COMM"
121 wxUint16 channels, bps;
122 wxUint32 num_samples;
123 double srate;
124 wxSoundFormatPcm sndformat;
125
126 data >> channels >> num_samples >> bps >> srate;
127
128 sndformat.SetSampleRate((wxUint32) srate);
129 sndformat.SetBPS(bps);
130 sndformat.SetChannels(channels);
aa95f52e 131 sndformat.Signed(FALSE);
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132 sndformat.SetOrder(wxBIG_ENDIAN);
133
134 if (!SetSoundFormat(sndformat))
135 return FALSE;
136 m_input->SeekI(len-18, wxFromCurrent);
137 break;
138 }
139 case SSND_SIGNATURE: { // "SSND"
140 data >> ssnd;
141 // m_input->SeekI(4, wxFromCurrent); // Pass an INT32
142 // m_input->SeekI(len-4, wxFromCurrent); // Pass the rest
143 m_input->SeekI(ssnd + 4, wxFromCurrent);
144 end_headers = TRUE;
145 break;
146 }
147 default:
148 m_input->SeekI(len, wxFromCurrent);
149 break;
150 }
151 }
152 return TRUE;
153}
154
155bool wxSoundAiff::PrepareToRecord(unsigned long time)
156{
503aa33d 157 // TODO
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158 return FALSE;
159}
160
161bool wxSoundAiff::FinishRecording()
162{
503aa33d 163 // TODO
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164 return FALSE;
165}
166
0662cd32 167wxUint32 wxSoundAiff::GetData(void *buffer, wxUint32 len)
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168{
169 return m_input->Read(buffer, len).LastRead();
170}
171
0662cd32 172wxUint32 wxSoundAiff::PutData(const void *buffer, wxUint32 len)
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173{
174 return m_output->Write(buffer, len).LastWrite();
175}