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ADM anc channel structures

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Jamie Hardt
2020-11-23 11:11:12 -08:00
parent 521e9d0670
commit 8191eedf14
1 changed files with 55 additions and 10 deletions
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65
src/fmt.rs
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@@ -10,25 +10,70 @@ enum FormatTags {
Extensible = 0xFFFE
}
const PCM_SUBTYPE_UUID: [u8; 16] = [0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x10,
0x80, 0x00, 0x00, 0xaa,
0x00, 0x38, 0x9b, 0x71];
const FLOAT_SUBTYPE_UUID: [u8; 16] = [0x00, 0x00, 0x00, 0x03,
0x00, 0x00, 0x00, 0x10,
0x80, 0x00, 0x00, 0xaa,
0x00, 0x38, 0x9b, 0x71];
const PCM_SUBTYPE_UUID: [u8; 16] = [0x00, 0x00, 0x00, 0x01,0x00, 0x00, 0x00, 0x10, 0x80, 0x00, 0x00, 0xaa,0x00, 0x38, 0x9b, 0x71];
const FLOAT_SUBTYPE_UUID: [u8; 16] = [0x00, 0x00, 0x00, 0x03,0x00, 0x00, 0x00, 0x10, 0x80, 0x00, 0x00, 0xaa,0x00, 0x38, 0x9b, 0x71];
/*
http://dream.cs.bath.ac.uk/researchdev/wave-ex/bformat.html
Integer format:
SUBTYPE_AMBISONIC_B_FORMAT_PCM
{00000001-0721-11d3-8644-C8C1CA000000}
Floating-point format:
SUBTYPE_AMBISONIC_B_FORMAT_IEEE_FLOAT
{00000003-0721-11d3-8644-C8C1CA000000}
In the case of ambisonics, I'm guessing we'd ignore the channel map and implied
channels W, X, Y, Z
*/
/// ADM Audio ID record
///
/// This structure relates a channel in the wave file to either a common ADM
/// channel definition or further definition in the WAV file's ADM metadata
/// chunk.
///
/// An individial channel in a WAV file can have multiple Audio IDs in an ADM
/// AudioProgramme.
///
/// See BS.2088-1 § 8, also BS.2094, also blahblahblah...
pub struct ADMAudioID {
track_uid: [char; 12],
channel_format_ref: [char; 14],
pack_ref: [char; 11]
}
/// Describes a single channel in a WAV file.
pub struct ChannelDescriptor {
/// Index, the offset of this channel's samples in one frame.
index: u16,
/// Channel assignment
///
/// This is either implied (in the case of mono or stereo wave files) or
/// explicitly given in `WaveFormatExtentended` for files with more tracks.
speaker: WaveFmtExtendedChannelMask,
/// ADM audioTrackUIDs
adm_track_audio_ids: Vec<ADMAudioID>,
}
/*
https://docs.microsoft.com/en-us/windows-hardware/drivers/audio/subformat-guids-for-compressed-audio-formats
http://dream.cs.bath.ac.uk/researchdev/wave-ex/bformat.html
These are from http://dream.cs.bath.ac.uk/researchdev/wave-ex/mulchaud.rtf
*/
#[derive(Debug)]
pub enum WaveFmtExtendedChannelMask {
DirectOut = 0x0,
FrontLeft = 0x1,
FrontRight = 0x2,
FrontCenter = 0x4,
@@ -46,7 +91,7 @@ pub enum WaveFmtExtendedChannelMask {
TopFrontRight = 0x4000,
TopBackLeft = 0x8000,
TopBackCenter = 0x10000,
TopBackRight = 0x20000
TopBackRight = 0x20000,
}