feat(audio): complete TTS pipeline — mel, voice, modes, phase, synth + AMX SIGILL fix

.claude/AMX_GOTCHAS.md

@@ -66,18 +66,41 @@ For CPUID leaf 7 (AMX detection): use `__cpuid_count()`, not inline asm.
 
 ---
 
-## Gotcha 4: OS must enable AMX via XSETBV
+## Gotcha 4: OS must enable AMX via XSETBV + process must request permission
 
-AMX tiles are large (8 KB of state). The OS must opt in via XCR0 bits 17+18.
-Linux 5.19+ enables AMX by default. Older kernels: SIGILL on tile instructions.
+AMX tiles are large (8 KB of state). Two levels of OS enablement required:
+
+1. **Kernel enables tile state in XCR0** (bits 17+18). Linux 5.19+ does this.
+2. **Process requests XCOMP_PERM** via `prctl(ARCH_REQ_XCOMP_PERM, 18)`.
+   Without this, LDTILECFG will SIGILL even if XCR0 bits are set.
 
 **Detection (stable)**:
 ```rust
-let xcr0 = core::arch::x86_64::__cpuid_count(0xD, 0);
-let tilecfg  = (xcr0.eax >> 17) & 1;  // bit 17 = XTILECFG
-let tiledata = (xcr0.eax >> 18) & 1;  // bit 18 = XTILEDATA
-// Both must be 1
-```
+// Step 1: CPUID — does CPU support AMX?
+let cpuid = core::arch::x86_64::__cpuid_count(7, 0);
+let amx_tile = (cpuid.edx >> 24) & 1;
+let amx_int8 = (cpuid.edx >> 25) & 1;
+
+// Step 2: OSXSAVE — does OS support XSAVE?
+let cpuid_01 = core::arch::x86_64::__cpuid(1);
+let osxsave = (cpuid_01.ecx >> 27) & 1;
+
+// Step 3: _xgetbv(0) — did OS ACTUALLY enable tile state?
+// ⚠ Do NOT use __cpuid_count(0xD, 0) — that reports what CPU SUPPORTS,
+//   not what the OS ENABLED. _xgetbv(0) reads the actual XCR0 register.
+let xcr0: u64 = unsafe { core::arch::x86_64::_xgetbv(0) };
+let tilecfg  = (xcr0 >> 17) & 1;  // bit 17 = XTILECFG
+let tiledata = (xcr0 >> 18) & 1;  // bit 18 = XTILEDATA
+
+// Step 4: prctl — request tile permission for this process
+// SYS_prctl = 157, ARCH_REQ_XCOMP_PERM = 0x1023, XFEATURE_XTILEDATA = 18
+// Returns 0 on success, -errno on failure. Idempotent.
+```
+
+**Previous bug**: `__cpuid_count(0xD, 0)` reports XSAVE state component bitmap
+(what the CPU *supports*), NOT the actual XCR0 value (what the OS *enabled*).
+On hypervisors that advertise AMX in CPUID but don't enable tile state,
+the old check returned `true` → SIGILL on LDTILECFG.
 
 ---
 

src/hpc/audio/codec_map.rs

@@ -0,0 +1,297 @@
+//! Codec provenance map: which real codec each primitive comes from.
+//!
+//! Every primitive in this audio stack was stolen from a production codec.
+//! Nothing invented — only transcoded and compressed to fit the HHTL cascade.
+//!
+//! ```text
+//! ┌─────────────┬──────────┬─────────┬────────┬─────────┬──────┬───────────┐
+//! │ Our type    │ Opus     │ Whisper │ MP3    │ Vorbis  │ Bark │ ElevenLabs│
+//! ├─────────────┼──────────┼─────────┼────────┼─────────┼──────┼───────────┤
+//! │ MDCT        │ CELT     │         │ hybrid │ ✓       │      │           │
+//! │ 21 bands    │ eBands48 │         │ 32 sub │ ✓       │      │           │
+//! │ PVQ shape   │ CELT PVQ │         │        │ residue │      │           │
+//! │ Mel 80ch    │          │ frontend│        │         │      │           │
+//! │ Phase 4B    │          │ STFT ∠  │        │         │      │           │
+//! │ VoiceArch   │          │         │        │         │ spk  │ embedding │
+//! │ RvqFrame    │          │         │        │         │ 3stg │           │
+//! │ OctaveBand  │          │         │ ✓      │ floor   │      │           │
+//! │ Mode        │          │         │        │         │      │ emotion   │
+//! │ HHTL skip   │          │         │ mask   │ floor   │      │           │
+//! │ CompLinear  │          │         │        │ VQ cb   │ RVQ  │           │
+//! │ Qualia17D   │ (QPL)    │         │        │         │ sem  │ emotion   │
+//! └─────────────┴──────────┴─────────┴────────┴─────────┴──────┴───────────┘
+//! ```
+//!
+//! The architecture replaces neural inference with graph search at every stage:
+//!   MP3's psychoacoustic model → HHTL cascade (RouteAction::Skip)
+//!   Whisper's transformer → phoneme graph shortest path
+//!   Bark's 3 GPT-2 stages → 3 HHTL levels (HEEL/HIP/TWIG)
+//!   Vorbis's codebook VQ → CompiledLinear VNNI palette lookup
+//!   ElevenLabs' voice cloning → VoiceArchetype 16-byte embedding
+
+/// Codec provenance for each audio primitive.
+///
+/// Documents which production codec each type was transcoded from,
+/// what aspect of that codec it captures, and what it replaces.
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum CodecSource {
+    Opus,
+    Whisper,
+    Mp3,
+    OggVorbis,
+    Bark,
+    ElevenLabs,
+}
+
+/// What aspect of audio each primitive captures.
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum AudioAspect {
+    /// Spectral energy distribution (WHAT frequencies)
+    SpectralEnvelope,
+    /// Fine spectral shape within bands (HOW the energy is distributed)
+    SpectralShape,
+    /// Perceptual frequency mapping (WHERE in human hearing)
+    PerceptualMapping,
+    /// Temporal phase relationships (WHEN harmonics align)
+    PhaseRelationship,
+    /// Speaker identity (WHO is speaking)
+    SpeakerIdentity,
+    /// Semantic/emotional content (WHY it sounds that way)
+    SemanticContent,
+    /// Psychoacoustic masking (WHAT to skip)
+    MaskingDecision,
+    /// Codebook lookup (HOW to decompress)
+    CodebookLookup,
+}
+
+/// Complete provenance record for one primitive.
+pub struct Provenance {
+    pub our_type: &'static str,
+    pub byte_size: usize,
+    pub source: CodecSource,
+    pub aspect: AudioAspect,
+    pub source_concept: &'static str,
+    pub what_it_replaces: &'static str,
+}
+
+/// Full provenance table for every audio primitive.
+///
+/// This IS the design document. If a new primitive doesn't appear here,
+/// it wasn't stolen from a real codec and shouldn't exist.
+pub const PROVENANCE: &[Provenance] = &[
+    // ═══ From Opus CELT ═══
+    Provenance {
+        our_type: "AudioFrame.band_energies",
+        byte_size: 42,
+        source: CodecSource::Opus,
+        aspect: AudioAspect::SpectralEnvelope,
+        source_concept: "eBands48 critical bands, gain in gain-shape split",
+        what_it_replaces: "Per-coefficient quantization (MP3/Vorbis)",
+    },
+    Provenance {
+        our_type: "AudioFrame.pvq_summary",
+        byte_size: 6,
+        source: CodecSource::Opus,
+        aspect: AudioAspect::SpectralShape,
+        source_concept: "PVQ (Pyramid Vector Quantization) pulse allocation",
+        what_it_replaces: "Huffman-coded residuals (MP3) / VQ codebook (Vorbis)",
+    },
+    Provenance {
+        our_type: "mdct_forward / mdct_backward",
+        byte_size: 0, // transform, not stored
+        source: CodecSource::Opus,
+        aspect: AudioAspect::SpectralEnvelope,
+        source_concept: "CELT MDCT: 960-sample window → 480 frequency bins",
+        what_it_replaces: "FFT+windowing (all codecs use some form)",
+    },
+
+    // ═══ From Whisper ═══
+    Provenance {
+        our_type: "mel::log_mel_spectrogram",
+        byte_size: 160, // 80 × BF16 per frame
+        source: CodecSource::Whisper,
+        aspect: AudioAspect::PerceptualMapping,
+        source_concept: "80-channel mel filterbank at 16kHz, Hann STFT",
+        what_it_replaces: "Transformer encoder (150M params → 80 f32 per frame)",
+    },
+
+    // ═══ From MP3 ═══
+    Provenance {
+        our_type: "HhtlCache::route() → Skip",
+        byte_size: 0, // decision, not stored
+        source: CodecSource::Mp3,
+        aspect: AudioAspect::MaskingDecision,
+        source_concept: "Psychoacoustic masking model (simultaneous + temporal)",
+        what_it_replaces: "ISO 11172-3 psychoacoustic model 1/2 (iterative bit allocation)",
+    },
+    Provenance {
+        our_type: "OctaveBand",
+        byte_size: 13, // 3×f32 + u8
+        source: CodecSource::Mp3,
+        aspect: AudioAspect::SpectralEnvelope,
+        source_concept: "32-subband polyphase filterbank (octave-spaced)",
+        what_it_replaces: "Per-subband quantization + Huffman (MP3 granules)",
+    },
+
+    // ═══ From Ogg Vorbis ═══
+    Provenance {
+        our_type: "CompiledLinear (ndarray burn)",
+        byte_size: 65536, // 256 centroids × 256 dim
+        source: CodecSource::OggVorbis,
+        aspect: AudioAspect::CodebookLookup,
+        source_concept: "VQ codebook: precomputed centroids, lookup-based decode",
+        what_it_replaces: "Huffman trees (MP3) / arithmetic coding (Opus range coder)",
+    },
+
+    // ═══ From Bark (Suno) ═══
+    Provenance {
+        our_type: "RvqFrame.archetype (HEEL)",
+        byte_size: 1,
+        source: CodecSource::Bark,
+        aspect: AudioAspect::SemanticContent,
+        source_concept: "Stage 1: GPT-2 semantic tokens (coarse meaning)",
+        what_it_replaces: "350M-param GPT-2 autoregressive generation",
+    },
+    Provenance {
+        our_type: "RvqFrame.coarse (HIP)",
+        byte_size: 8,
+        source: CodecSource::Bark,
+        aspect: AudioAspect::SpectralEnvelope,
+        source_concept: "Stage 2: GPT-2 coarse acoustic tokens (spectral envelope)",
+        what_it_replaces: "350M-param GPT-2 conditioned on semantic tokens",
+    },
+    Provenance {
+        our_type: "RvqFrame.fine (TWIG)",
+        byte_size: 8,
+        source: CodecSource::Bark,
+        aspect: AudioAspect::SpectralShape,
+        source_concept: "Stage 3: non-autoregressive fine acoustic tokens",
+        what_it_replaces: "Fine model (smaller network, fills spectral detail)",
+    },
+
+    // ═══ From ElevenLabs ═══
+    Provenance {
+        our_type: "VoiceArchetype",
+        byte_size: 16,
+        source: CodecSource::ElevenLabs,
+        aspect: AudioAspect::SpeakerIdentity,
+        source_concept: "Speaker embedding (voice cloning conditioning vector)",
+        what_it_replaces: "512-dim speaker embedding (2KB → 16 bytes)",
+    },
+
+    // ═══ Phase (novel — no codec stores this) ═══
+    Provenance {
+        our_type: "PhaseDescriptor",
+        byte_size: 4,
+        source: CodecSource::Whisper, // closest: Whisper STFT preserves phase internally
+        aspect: AudioAspect::PhaseRelationship,
+        source_concept: "STFT phase (discarded by all codecs except Griffin-Lim)",
+        what_it_replaces: "Nothing — all codecs discard phase. We keep it as relative pressure.",
+    },
+
+    // ═══ Qualia (novel — derived from QPL musical calibration) ═══
+    Provenance {
+        our_type: "Qualia17D",
+        byte_size: 68,
+        source: CodecSource::Bark, // closest: Bark semantic tokens carry meaning
+        aspect: AudioAspect::SemanticContent,
+        source_concept: "QPL: Octave→arousal, Fifth→valence, Third→warmth, Tritone→tension",
+        what_it_replaces: "No codec captures nonverbal meaning explicitly. This is the grid.",
+    },
+];
+
+/// Total bytes for one complete frame (all primitives combined).
+///
+/// AudioFrame (48) + PhaseDescriptor (4) + VoiceArchetype (16, amortized)
+/// = 52 bytes per frame for complete nonverbal characterization.
+/// + RvqFrame (17) for HHTL-compressed TTS output = 69 bytes.
+///
+/// Compare:
+///   MP3 128kbps: ~417 bytes per 26ms frame
+///   Opus 64kbps: ~166 bytes per 20ms frame
+///   Bark tokens: ~128 bytes per frame
+///   Ours: 52-69 bytes per frame (complete, including phase + identity)
+pub const FRAME_BUDGET: usize = 52;
+pub const FRAME_BUDGET_WITH_TTS: usize = 69;
+
+/// Codec comparison: bits per second at comparable quality.
+///
+/// These are approximate — our codec is lossy in a fundamentally
+/// different way (palette quantization, not psychoacoustic masking).
+pub const BITRATE_COMPARISON: &[(&str, u32, &str)] = &[
+    ("MP3 128k",     128_000, "psychoacoustic masking, Huffman"),
+    ("Opus 64k",      64_000, "CELT+SILK hybrid, range coder"),
+    ("Vorbis 128k",  128_000, "MDCT, floor+residue, VQ codebook"),
+    ("Bark tokens",   25_600, "3-stage RVQ, ~100 tokens/sec × 256 bits"),
+    ("Ours (48kHz)",  20_800, "52 bytes × 50 fps × 8 bits = 20.8 kbps"),
+    ("Ours (24kHz)",  10_400, "52 bytes × 25 fps × 8 bits = 10.4 kbps"),
+];
+
+/// Verify every AudioAspect is covered by at least one primitive.
+/// If an aspect is missing, we have a hole in our codec design.
+pub fn verify_aspect_coverage() -> Vec<AudioAspect> {
+    use AudioAspect::*;
+    let all = [SpectralEnvelope, SpectralShape, PerceptualMapping,
+               PhaseRelationship, SpeakerIdentity, SemanticContent,
+               MaskingDecision, CodebookLookup];
+
+    all.iter()
+        .filter(|&&aspect| !PROVENANCE.iter().any(|p| p.aspect == aspect))
+        .copied()
+        .collect()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn all_aspects_covered() {
+        let missing = verify_aspect_coverage();
+        assert!(missing.is_empty(), "Missing audio aspects: {:?}", missing);
+    }
+
+    #[test]
+    fn frame_budget_correct() {
+        // AudioFrame (48) + PhaseDescriptor (4) = 52
+        assert_eq!(FRAME_BUDGET, 48 + 4);
+        // + RvqFrame (17) = 69
+        assert_eq!(FRAME_BUDGET_WITH_TTS, 48 + 4 + 17);
+    }
+
+    #[test]
+    fn provenance_byte_sizes_consistent() {
+        // AudioFrame = 42 (energies) + 6 (pvq) = 48
+        let af_energies = PROVENANCE.iter().find(|p| p.our_type == "AudioFrame.band_energies").unwrap();
+        let af_pvq = PROVENANCE.iter().find(|p| p.our_type == "AudioFrame.pvq_summary").unwrap();
+        assert_eq!(af_energies.byte_size + af_pvq.byte_size, 48);
+
+        // RvqFrame = 1 (HEEL) + 8 (HIP) + 8 (TWIG) = 17
+        let rvq_heel = PROVENANCE.iter().find(|p| p.our_type == "RvqFrame.archetype (HEEL)").unwrap();
+        let rvq_hip = PROVENANCE.iter().find(|p| p.our_type == "RvqFrame.coarse (HIP)").unwrap();
+        let rvq_twig = PROVENANCE.iter().find(|p| p.our_type == "RvqFrame.fine (TWIG)").unwrap();
+        assert_eq!(rvq_heel.byte_size + rvq_hip.byte_size + rvq_twig.byte_size, 17);
+    }
+
+    #[test]
+    fn every_source_codec_represented() {
+        // All 6 source codecs should appear at least once
+        for source in [CodecSource::Opus, CodecSource::Whisper, CodecSource::Mp3,
+                       CodecSource::OggVorbis, CodecSource::Bark, CodecSource::ElevenLabs] {
+            assert!(PROVENANCE.iter().any(|p| p.source == source),
+                "Codec {:?} not represented in provenance table", source);
+        }
+    }
+
+    #[test]
+    fn our_bitrate_competitive() {
+        // Our codec should be lower bitrate than all traditional codecs
+        let ours_24k = BITRATE_COMPARISON.iter()
+            .find(|&&(name, _, _)| name == "Ours (24kHz)")
+            .unwrap().1;
+        let mp3 = BITRATE_COMPARISON.iter()
+            .find(|&&(name, _, _)| name == "MP3 128k")
+            .unwrap().1;
+        assert!(ours_24k < mp3, "Our codec should be lower bitrate than MP3");
+    }
+}