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encoder/wave: refactor fill_wave_header() to function

This commit is contained in:
Max Kellermann 2021-02-16 19:33:17 +01:00
parent 6153fca4fc
commit aa2e1bb310
1 changed files with 24 additions and 21 deletions
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45
src/encoder/plugins/WaveEncoderPlugin.cxx
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@ -71,30 +71,34 @@ struct WaveHeader {
uint32_t data_size;
};
static void
fill_wave_header(WaveHeader *header, int channels, int bits,
int freq, int block_size) noexcept
static constexpr WaveHeader
MakeWaveHeader(int channels, int bits,
int freq, int block_size) noexcept
{
WaveHeader header{};
int data_size = 0x0FFFFFFF;
/* constants */
header->id_riff = ToLE32(0x46464952);
header->id_wave = ToLE32(0x45564157);
header->id_fmt = ToLE32(0x20746d66);
header->id_data = ToLE32(0x61746164);
header.id_riff = ToLE32(0x46464952);
header.id_wave = ToLE32(0x45564157);
header.id_fmt = ToLE32(0x20746d66);
header.id_data = ToLE32(0x61746164);
/* wave format */
header->format = ToLE16(WAVE_FORMAT_PCM);
header->channels = ToLE16(channels);
header->bits = ToLE16(bits);
header->freq = ToLE32(freq);
header->blocksize = ToLE16(block_size);
header->byterate = ToLE32(freq * block_size);
header.format = ToLE16(WAVE_FORMAT_PCM);
header.channels = ToLE16(channels);
header.bits = ToLE16(bits);
header.freq = ToLE32(freq);
header.blocksize = ToLE16(block_size);
header.byterate = ToLE32(freq * block_size);
/* chunk sizes (fake data length) */
header->fmt_size = ToLE32(16);
header->data_size = ToLE32(data_size);
header->riff_size = ToLE32(4 + (8 + 16) + (8 + data_size));
header.fmt_size = ToLE32(16);
header.data_size = ToLE32(data_size);
header.riff_size = ToLE32(4 + (8 + 16) + (8 + data_size));
return header;
}
static PreparedEncoder *
@ -137,11 +141,10 @@ WaveEncoder::WaveEncoder(AudioFormat &audio_format) noexcept
auto *header = (WaveHeader *)range.data;
/* create PCM wave header in initial buffer */
fill_wave_header(header,
audio_format.channels,
bits,
audio_format.sample_rate,
(bits / 8) * audio_format.channels);
*header = MakeWaveHeader(audio_format.channels,
bits,
audio_format.sample_rate,
(bits / 8) * audio_format.channels);
buffer.Append(sizeof(*header));
}