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Rework the deinter example, create writers before reading through the input file

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This commit is contained in:
Ian Hobson
2023-05-12 16:52:06 +02:00
parent 0074e13bff
commit 7290d5ec81
1 changed files with 22 additions and 19 deletions
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41
examples/wave-deinter.rs
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@@ -71,29 +71,32 @@ fn process_file(infile: &str, delim: &str, numeric_channel_names: bool) -> Resul
let ouptut_format =
WaveFmt::new_pcm_mono(input_format.sample_rate, input_format.bits_per_sample);
let mut input_wave_reader = input_file.audio_frame_reader()?;
let mut output_wave_writers = channel_desc
.iter()
.enumerate()
.map(|(n, channel)| {
let suffix = name_suffix(numeric_channel_names, delim, n + 1, channel);
let outfile_name = output_dir
.join(format!("{}{}.wav", basename, suffix))
.into_os_string()
.into_string()
.unwrap();
for (n, channel) in channel_desc.iter().enumerate() {
let suffix = name_suffix(numeric_channel_names, delim, n + 1, channel);
let outfile_name = output_dir
.join(format!("{}{}.wav", basename, suffix))
.into_os_string()
.into_string()
.unwrap();
WaveWriter::create(&outfile_name, ouptut_format)
.expect("Failed to create new file")
.audio_frame_writer()
})
.collect::<Result<Vec<_>, _>>()?;
println!("Will create file {}", outfile_name);
let output_file =
WaveWriter::create(&outfile_name, ouptut_format).expect("Failed to create new file");
let mut output_wave_writer = output_file.audio_frame_writer()?;
let mut buffer = input_format.create_frame_buffer(1);
while input_wave_reader.read_integer_frame(&mut buffer)? > 0 {
output_wave_writer.write_integer_frames(&buffer[n..=n])?;
let mut buffer = input_format.create_frame_buffer(1);
while input_wave_reader.read_integer_frame(&mut buffer)? > 0 {
for (n, writer) in output_wave_writers.iter_mut().enumerate() {
writer.write_integer_frames(&buffer[n..=n])?;
}
}
output_wave_writer.end()?;
input_wave_reader.locate(0)?;
for writer in output_wave_writers.drain(..) {
writer.end()?;
}
Ok(())