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526ddb13 GL |
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 | ||
6c5e6376 GL |
12 | #include <wx/wxprec.h> |
13 | ||
526ddb13 GL |
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 | ||
31 | wxSoundAiff::wxSoundAiff(wxInputStream& stream, wxSoundStream& io_sound) | |
32 | : wxSoundFileStream(stream, io_sound) | |
33 | { | |
34 | } | |
35 | ||
36 | wxSoundAiff::wxSoundAiff(wxOutputStream& stream, wxSoundStream& io_sound) | |
37 | : wxSoundFileStream(stream, io_sound) | |
38 | { | |
39 | } | |
40 | ||
41 | wxSoundAiff::~wxSoundAiff() | |
42 | { | |
43 | } | |
44 | ||
56dc1ffd GL |
45 | bool 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 | ||
526ddb13 GL |
83 | #define FAIL_WITH(condition, err) if (condition) { m_snderror = err; return FALSE; } |
84 | ||
85 | bool 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); |
526ddb13 GL |
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 | ||
155 | bool wxSoundAiff::PrepareToRecord(unsigned long time) | |
156 | { | |
503aa33d | 157 | // TODO |
526ddb13 GL |
158 | return FALSE; |
159 | } | |
160 | ||
161 | bool wxSoundAiff::FinishRecording() | |
162 | { | |
503aa33d | 163 | // TODO |
526ddb13 GL |
164 | return FALSE; |
165 | } | |
166 | ||
0662cd32 | 167 | wxUint32 wxSoundAiff::GetData(void *buffer, wxUint32 len) |
526ddb13 GL |
168 | { |
169 | return m_input->Read(buffer, len).LastRead(); | |
170 | } | |
171 | ||
0662cd32 | 172 | wxUint32 wxSoundAiff::PutData(const void *buffer, wxUint32 len) |
526ddb13 GL |
173 | { |
174 | return m_output->Write(buffer, len).LastWrite(); | |
175 | } |