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6 | ** This file is part of the test suite of the Qt Toolkit. |
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8 | ** $QT_BEGIN_LICENSE:GPL-EXCEPT$ |
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27 | ****************************************************************************/ |
28 | |
29 | #include <QtCore/qendian.h> |
30 | #include "wavheader.h" |
31 | |
32 | |
33 | struct chunk |
34 | { |
35 | char id[4]; |
36 | quint32 size; |
37 | }; |
38 | |
39 | struct |
40 | { |
41 | chunk ; // "RIFF" |
42 | char [4]; // "WAVE" |
43 | }; |
44 | |
45 | struct |
46 | { |
47 | chunk ; |
48 | quint16 ; |
49 | quint16 ; |
50 | quint32 ; |
51 | quint32 ; |
52 | quint16 ; |
53 | quint16 ; |
54 | }; |
55 | |
56 | struct |
57 | { |
58 | chunk ; |
59 | }; |
60 | |
61 | struct |
62 | { |
63 | RIFFHeader ; |
64 | WAVEHeader ; |
65 | DATAHeader ; |
66 | }; |
67 | |
68 | static const int = sizeof(CombinedHeader); |
69 | |
70 | |
71 | WavHeader::(const QAudioFormat &format, qint64 dataLength) |
72 | : m_format(format) |
73 | , m_dataLength(dataLength) |
74 | { |
75 | |
76 | } |
77 | |
78 | bool WavHeader::(QIODevice &device) |
79 | { |
80 | bool result = true; |
81 | |
82 | if (!device.isSequential()) |
83 | result = device.seek(pos: 0); |
84 | // else, assume that current position is the start of the header |
85 | |
86 | if (result) { |
87 | CombinedHeader ; |
88 | result = (device.read(data: reinterpret_cast<char *>(&header), maxlen: HeaderLength) == HeaderLength); |
89 | if (result) { |
90 | if ((memcmp(s1: &header.riff.descriptor.id, s2: "RIFF" , n: 4) == 0 |
91 | || memcmp(s1: &header.riff.descriptor.id, s2: "RIFX" , n: 4) == 0) |
92 | && memcmp(s1: &header.riff.type, s2: "WAVE" , n: 4) == 0 |
93 | && memcmp(s1: &header.wave.descriptor.id, s2: "fmt " , n: 4) == 0 |
94 | && header.wave.audioFormat == 1 // PCM |
95 | ) { |
96 | if (memcmp(s1: &header.riff.descriptor.id, s2: "RIFF" , n: 4) == 0) |
97 | m_format.setByteOrder(QAudioFormat::LittleEndian); |
98 | else |
99 | m_format.setByteOrder(QAudioFormat::BigEndian); |
100 | |
101 | m_format.setChannelCount(qFromLittleEndian<quint16>(source: header.wave.numChannels)); |
102 | m_format.setCodec("audio/pcm" ); |
103 | m_format.setSampleRate(qFromLittleEndian<quint32>(source: header.wave.sampleRate)); |
104 | m_format.setSampleSize(qFromLittleEndian<quint16>(source: header.wave.bitsPerSample)); |
105 | |
106 | switch(header.wave.bitsPerSample) { |
107 | case 8: |
108 | m_format.setSampleType(QAudioFormat::UnSignedInt); |
109 | break; |
110 | case 16: |
111 | m_format.setSampleType(QAudioFormat::SignedInt); |
112 | break; |
113 | default: |
114 | result = false; |
115 | } |
116 | |
117 | m_dataLength = device.size() - HeaderLength; |
118 | } else { |
119 | result = false; |
120 | } |
121 | } |
122 | } |
123 | |
124 | return result; |
125 | } |
126 | |
127 | bool WavHeader::(QIODevice &device) |
128 | { |
129 | CombinedHeader ; |
130 | |
131 | memset(s: &header, c: 0, n: HeaderLength); |
132 | |
133 | // RIFF header |
134 | if (m_format.byteOrder() == QAudioFormat::LittleEndian) |
135 | memcpy(dest: header.riff.descriptor.id,src: "RIFF" ,n: 4); |
136 | else |
137 | memcpy(dest: header.riff.descriptor.id,src: "RIFX" ,n: 4); |
138 | qToLittleEndian<quint32>(src: quint32(m_dataLength + HeaderLength - 8), |
139 | dest: reinterpret_cast<unsigned char*>(&header.riff.descriptor.size)); |
140 | memcpy(dest: header.riff.type, src: "WAVE" ,n: 4); |
141 | |
142 | // WAVE header |
143 | memcpy(dest: header.wave.descriptor.id,src: "fmt " ,n: 4); |
144 | qToLittleEndian<quint32>(src: quint32(16), |
145 | dest: reinterpret_cast<unsigned char*>(&header.wave.descriptor.size)); |
146 | qToLittleEndian<quint16>(src: quint16(1), |
147 | dest: reinterpret_cast<unsigned char*>(&header.wave.audioFormat)); |
148 | qToLittleEndian<quint16>(src: quint16(m_format.channelCount()), |
149 | dest: reinterpret_cast<unsigned char*>(&header.wave.numChannels)); |
150 | qToLittleEndian<quint32>(src: quint32(m_format.sampleRate()), |
151 | dest: reinterpret_cast<unsigned char*>(&header.wave.sampleRate)); |
152 | qToLittleEndian<quint32>(src: quint32(m_format.sampleRate() * m_format.channelCount() * m_format.sampleSize() / 8), |
153 | dest: reinterpret_cast<unsigned char*>(&header.wave.byteRate)); |
154 | qToLittleEndian<quint16>(src: quint16(m_format.channelCount() * m_format.sampleSize() / 8), |
155 | dest: reinterpret_cast<unsigned char*>(&header.wave.blockAlign)); |
156 | qToLittleEndian<quint16>(src: quint16(m_format.sampleSize()), |
157 | dest: reinterpret_cast<unsigned char*>(&header.wave.bitsPerSample)); |
158 | |
159 | // DATA header |
160 | memcpy(dest: header.data.descriptor.id,src: "data" ,n: 4); |
161 | qToLittleEndian<quint32>(src: quint32(m_dataLength), |
162 | dest: reinterpret_cast<unsigned char*>(&header.data.descriptor.size)); |
163 | |
164 | return (device.write(data: reinterpret_cast<const char *>(&header), len: HeaderLength) == HeaderLength); |
165 | } |
166 | |
167 | const QAudioFormat& WavHeader::() const |
168 | { |
169 | return m_format; |
170 | } |
171 | |
172 | qint64 WavHeader::() const |
173 | { |
174 | return m_dataLength; |
175 | } |
176 | |
177 | qint64 WavHeader::() |
178 | { |
179 | return HeaderLength; |
180 | } |
181 | |
182 | bool WavHeader::(QIODevice &device, qint64 dataLength) |
183 | { |
184 | bool result = false; |
185 | if (!device.isSequential()) { |
186 | device.seek(pos: 40); |
187 | unsigned char dataLengthLE[4]; |
188 | qToLittleEndian<quint32>(src: quint32(dataLength), dest: dataLengthLE); |
189 | result = (device.write(data: reinterpret_cast<const char *>(dataLengthLE), len: 4) == 4); |
190 | } |
191 | return result; |
192 | } |
193 | |