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Writer impl in progress

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Jamie Hardt
2020-12-25 12:30:08 -08:00
parent 3d7c74fc94
commit 9a275a69c3
5 changed files with 138 additions and 51 deletions
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45
src/audio_frame_writer.rs
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@@ -1,4 +1,4 @@
use std::io::{Write,Seek};
use std::io::{Write,Seek,SeekFrom};
use super::wavewriter::WaveWriter;
use super::errors::Error;
@@ -11,36 +11,33 @@ pub struct AudioFrameWriter<W: Write + Seek> {
inner : W,
form_size : u64,
data_size : u64,
data_start : u64,
format: WaveFmt
}
impl<W: Write + Seek> AudioFrameWriter<W> {
pub fn make(wave_writer : WaveWriter<W>) -> Self {
Self {
inner: wave_writer.inner,
form_size: wave_writer.form_size,
data_size: 0u64,
format : wave_writer.format
}
impl<W:Write + Seek> AudioFrameWriter<W> {
pub fn new(inner: W, format: WaveFmt) -> Self {
todo!();
}
pub fn write_integer_frame(&mut self, buffer: &mut [i32]) -> Result<u64, Error> {
pub fn write_audio_frame(&mut self, buffer: &[i32]) -> Result<u64,Error> {
assert!(buffer.len() as u16 == self.format.channel_count,
"write_integer_frame was called with a mis-sized buffer, expected {}, was {}",
self.format.channel_count, buffer.len());
"read_integer_frame was called with a mis-sized buffer, expected {}, was {}",
self.format.channel_count, buffer.len());
let framed_bits_per_sample = self.format.block_alignment * 8 / self.format.channel_count;
for n in 0..(self.format.channel_count as usize) {
match (self.format.bits_per_sample, framed_bits_per_sample) {
(0..=8,8) => self.inner.write_u8(buffer[n] as u8 + 0x80_u8)?, // EBU 3285 §A2.2
(9..=16,16) => self.inner.write_i16::<LittleEndian>(buffer[n] as i16)?,
(10..=24,24) => self.inner.write_i24::<LittleEndian>(buffer[n])?,
(25..=32,32) => self.inner.write_i32::<LittleEndian>(buffer[n])?,
(b,_)=> panic!("Unrecognized integer format, bits per sample {}, channels {}, block_alignment {}",
b, self.format.channel_count, self.format.block_alignment)
}
let framed_bits_per_sample = self.format.block_alignment * 8 / self.format.channel_count;
for n in 0..(self.format.channel_count as usize) {
match (self.format.bits_per_sample, framed_bits_per_sample) {
(0..=8,8) => self.inner.write_u8(( buffer[n] + 0x80) as u8 )?, // EBU 3285 §A2.2
(9..=16,16) => self.inner.write_i16::<LittleEndian>(buffer[n] as i16)?,
(10..=24,24) => self.inner.write_i24::<LittleEndian>(buffer[n])?,
(25..=32,32) => self.inner.write_i32::<LittleEndian>(buffer[n])?,
(b,_)=> panic!("Unrecognized integer format, bits per sample {}, channels {}, block_alignment {}",
b, self.format.channel_count, self.format.block_alignment)
}
Ok( 1 )
}
Ok( 1 )
}
}