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let's make SoX happy

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This commit is contained in:
Ahmet Inan 2025-07-22 13:25:44 +02:00
commit 7eee2fe7c8
1 changed files with 25 additions and 7 deletions
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32
wav.hh
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@ -91,7 +91,8 @@ public:
if (cmp4("data", Subchunk2ID))
return;
int Subchunk2Size = readLE(4);
if (36 + Subchunk2Size > ChunkSize)
int overhead = bits_ == 32 ? 50 : 36;
if (Subchunk2Size + overhead > ChunkSize)
return;
if (Subchunk1Size == 16)
frames_ = Subchunk2Size / (bytes * channels_);
@ -201,25 +202,42 @@ public:
max = 1;
}
os.write("RIFF", 4); // ChunkID
writeLE(36, 4); // ChunkSize
writeLE(bits == 32 ? 50 : 36, 4); // ChunkSize
os.write("WAVE", 4); // Format
os.write("fmt ", 4); // Subchunk1ID
writeLE(16, 4); // Subchunk1Size
writeLE(bits == 32 ? 3 : 1, 2); // AudioFormat
if (bits == 32) {
writeLE(18, 4); // Subchunk1Size
writeLE(3, 2); // AudioFormat
} else {
writeLE(16, 4); // Subchunk1Size
writeLE(1, 2); // AudioFormat
}
writeLE(channels_, 2); // NumChannels
writeLE(rate_, 4); // SampleRate
writeLE(rate_ * channels_ * bytes, 4); // ByteRate
writeLE(channels_ * bytes, 2); // BlockAlign
writeLE(8 * bytes, 2); // BitsPerSample
if (bits == 32) {
writeLE(0, 2); // ExtSize
os.write("fact", 4); // SubchunkID
writeLE(4, 4); // SubchunkSize
writeLE(0, 4); // FrameCount
}
os.write("data", 4); // Subchunk2ID
writeLE(0, 4); // Subchunk2Size
}
~WriteWAV()
{
int size = int(os.tellp()) - 44;
int overhead = bytes == 4 ? 50 : 36;
int size = int(os.tellp()) - overhead;
os.seekp(4);
writeLE(36 + size, 4); // ChunkSize
os.seekp(40);
writeLE(overhead + size, 4); // ChunkSize
if (bytes == 4) {
os.seekp(46);
int frames = size / (bytes * channels_);
writeLE(frames, 4); // FrameCount
}
os.seekp(overhead + 4);
writeLE(size, 4); // Subchunk2Size
}
void write(const TYPE *buf, int num, int stride = -1)