Edison Jwa
7dbf461262
Remove unused AudioFrame10ms/20ms structs, disable_failed_vad_backend(), and ServerState dead accessors (replace_from_snapshot, channel_count, client_count). Update tests to use .channels().count()/.clients().count().
44 lines
1.3 KiB
Rust
44 lines
1.3 KiB
Rust
//! Canonical P1 voice frame helpers.
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//!
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//! The network contract remains 48 kHz mono, 20 ms Opus frames. P1
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//! processing works internally on 10 ms f32 frames so VAD and future
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//! processors can share a stable frame size without changing the
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//! transport layer.
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/// P1 sample rate in Hz.
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pub const SAMPLE_RATE_HZ: u32 = 48_000;
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/// Network frame duration in milliseconds.
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pub const NETWORK_FRAME_MS: u32 = 20;
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/// Processing frame duration in milliseconds.
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pub const PROCESSING_FRAME_MS: u32 = 10;
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/// Samples in one 10 ms mono frame at 48 kHz.
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pub const FRAME_10MS_SAMPLES: usize = 480;
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/// Samples in one 20 ms mono frame at 48 kHz.
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pub const FRAME_20MS_SAMPLES: usize = 960;
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/// Convert i16 PCM to normalized f32 PCM.
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pub fn i16_to_f32(sample: i16) -> f32 {
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sample as f32 / i16::MAX as f32
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}
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/// Convert normalized f32 PCM to saturated i16 PCM.
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pub fn f32_to_i16(sample: f32) -> i16 {
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(sample.clamp(-1.0, 1.0) * i16::MAX as f32) as i16
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}
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/// RMS dBFS for a normalized f32 slice. Silence returns `-120.0`.
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pub fn dbfs(samples: &[f32]) -> f32 {
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if samples.is_empty() {
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return -120.0;
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}
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let sum = samples.iter().map(|s| s * s).sum::<f32>();
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let rms = (sum / samples.len() as f32).sqrt();
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if rms <= 0.000_001 {
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-120.0
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} else {
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20.0 * rms.log10()
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}
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}
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