Init foo_input_joc

2026-09-25 17:07:04 +08:00
commit ad62a914e6
127 changed files with 38545 additions and 0 deletions
@@ -0,0 +1,71 @@
+#include "speaker/speaker_layout_lookup.h"
+
+#include <cstring>
+
+namespace joc::speaker {
+
+namespace {
+
+struct FrozenLayout {
+    const char* name;
+    std::uint32_t out_ch_config;
+    std::uint32_t speaker_bitfield;
+};
+
+constexpr FrozenLayout kLayouts[kLayoutCount] = {
+    {"2.0", 0, 1},
+    {"3.1", 3, 7},
+    {"5.1", 7, 15},
+    {"7.1", 11, 31},
+    {"5.1.2", 13, 1039},
+    {"5.1.4", 14, 2575},
+    {"7.1.2", 15, 1055},
+    {"7.1.4", 16, 2591},
+    {"9.1.4", 19, 2719},
+    {"9.1.6", 20, 3743},
+};
+
+void fill(const FrozenLayout& source, LayoutInfo* out) {
+    out->name = source.name;
+    out->out_ch_config = source.out_ch_config;
+    out->speaker_bitfield = source.speaker_bitfield;
+    out->channel_count = ejoc_speaker_layout_channel_count(source.speaker_bitfield);
+}
+
+}  // namespace
+
+bool layout_at(int index, LayoutInfo* out) {
+    if (out == nullptr || index < 0 || index >= kLayoutCount) {
+        return false;
+    }
+    fill(kLayouts[index], out);
+    return true;
+}
+
+bool layout_by_name(const char* name, LayoutInfo* out) {
+    if (name == nullptr || out == nullptr) {
+        return false;
+    }
+    for (int index = 0; index < kLayoutCount; ++index) {
+        if (std::strcmp(name, kLayouts[index].name) == 0) {
+            fill(kLayouts[index], out);
+            return true;
+        }
+    }
+    return false;
+}
+
+bool layout_by_bitfield(std::uint32_t bitfield, LayoutInfo* out) {
+    if (out == nullptr) {
+        return false;
+    }
+    for (int index = 0; index < kLayoutCount; ++index) {
+        if (kLayouts[index].speaker_bitfield == bitfield) {
+            fill(kLayouts[index], out);
+            return true;
+        }
+    }
+    return false;
+}
+
+}  // namespace joc::speaker
@@ -0,0 +1,28 @@
+
+#pragma once
+
+#include <cstdint>
+
+#include "eac3joc_core.h"
+#include "joc_core.h"
+
+namespace joc::speaker {
+
+inline constexpr int kLayoutCount = 10;
+
+struct LayoutInfo {
+    const char* name = "";
+    std::uint32_t out_ch_config = 0;
+    std::uint32_t speaker_bitfield = 0;
+    std::uint32_t channel_count = 0;
+};
+
+// All ten layouts in the reference's order (2.0, 3.1, 5.1, 7.1, 5.1.2, 5.1.4,
+bool layout_at(int index, LayoutInfo* out);
+
+// False when the name is unknown (case-sensitive, exactly as the reference CLI).
+bool layout_by_name(const char* name, LayoutInfo* out);
+
+bool layout_by_bitfield(std::uint32_t bitfield, LayoutInfo* out);
+
+}  // namespace joc::speaker
@@ -0,0 +1,534 @@
+#pragma once
+
+#include <array>
+#include <cstddef>
+#include <cstdint>
+
+namespace ejoc::speaker_tables {
+
+inline constexpr std::size_t kMaxPoints = 15;
+inline constexpr std::size_t kMaxGroups = 4;
+inline constexpr std::size_t kMaxGroupSize = 3;
+inline constexpr std::size_t kMaxChannels = 16;
+
+struct SpeakerPoint {
+    std::array<std::uint16_t, 3> coordinate_q15{};
+    std::uint8_t speaker_id{};
+};
+
+struct AxisGroup {
+    std::uint8_t size{};
+    std::array<std::uint8_t, kMaxGroupSize> indices{};
+};
+
+struct RegionGeometry {
+    std::uint8_t point_count{};
+    std::uint8_t mode{};
+    std::uint8_t axis0_group_count{};
+    std::uint8_t axis1_group_count{};
+    std::array<SpeakerPoint, kMaxPoints> points{};
+    std::array<AxisGroup, kMaxGroups> axis0_groups{};
+    std::array<AxisGroup, kMaxGroups> axis1_groups{};
+};
+
+struct LayoutGeometry {
+    std::uint32_t speaker_bitfield{};
+    std::uint8_t out_ch_config{};
+    std::uint8_t channel_count{};
+    std::array<std::uint8_t, kMaxChannels> standard_from_internal{};
+    std::array<RegionGeometry, 7> regions{};
+};
+
+inline constexpr std::array<LayoutGeometry, 10> kLayouts{{
+    LayoutGeometry{
+        0x1u, 0, 2,
+        {{0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
+        {{
+        RegionGeometry{
+            2, 1, 1, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{2, {0, 1, 0}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            2, 1, 1, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{2, {0, 1, 0}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            2, 1, 1, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{2, {0, 1, 0}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            2, 1, 1, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{2, {0, 1, 0}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            2, 1, 1, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{2, {0, 1, 0}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            2, 1, 1, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{2, {0, 1, 0}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            2, 1, 1, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{2, {0, 1, 0}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        }
+        }}
+    },
+    LayoutGeometry{
+        0x7u, 3, 4,
+        {{0, 1, 2, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
+        {{
+        RegionGeometry{
+            3, 1, 1, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            3, 1, 1, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            3, 1, 1, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            1, 1, 1, 0,
+            {{SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{1, {0, 0, 0}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            3, 1, 1, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            3, 1, 1, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            3, 1, 1, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        }
+        }}
+    },
+    LayoutGeometry{
+        0xFu, 7, 6,
+        {{0, 1, 2, 3, 4, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
+        {{
+        RegionGeometry{
+            5, 2, 2, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{{0, 32767, 0}, 4}, SpeakerPoint{{32767, 32767, 0}, 5}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{2, {3, 4, 0}}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            5, 2, 2, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{{0, 32767, 0}, 4}, SpeakerPoint{{32767, 32767, 0}, 5}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{2, {3, 4, 0}}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            5, 2, 2, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{{0, 32767, 0}, 4}, SpeakerPoint{{32767, 32767, 0}, 5}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{2, {3, 4, 0}}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            3, 2, 2, 0,
+            {{SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{{0, 32767, 0}, 4}, SpeakerPoint{{32767, 32767, 0}, 5}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{1, {0, 0, 0}}, AxisGroup{2, {1, 2, 0}}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            3, 1, 1, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            2, 1, 1, 0,
+            {{SpeakerPoint{{0, 32767, 0}, 4}, SpeakerPoint{{32767, 32767, 0}, 5}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{2, {0, 1, 0}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            3, 1, 1, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        }
+        }}
+    },
+    LayoutGeometry{
+        0x1Fu, 11, 8,
+        {{0, 1, 2, 3, 6, 7, 4, 5, 0, 0, 0, 0, 0, 0, 0, 0}},
+        {{
+        RegionGeometry{
+            7, 2, 3, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{{0, 16384, 0}, 4}, SpeakerPoint{{32767, 16384, 0}, 5}, SpeakerPoint{{0, 32767, 0}, 6}, SpeakerPoint{{32767, 32767, 0}, 7}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{2, {3, 4, 0}}, AxisGroup{2, {5, 6, 0}}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            5, 2, 2, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{{0, 16384, 0}, 4}, SpeakerPoint{{32767, 16384, 0}, 5}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{2, {3, 4, 0}}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            5, 2, 2, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{{0, 32767, 0}, 6}, SpeakerPoint{{32767, 32767, 0}, 7}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{2, {3, 4, 0}}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            3, 2, 2, 0,
+            {{SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{{0, 32767, 0}, 6}, SpeakerPoint{{32767, 32767, 0}, 7}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{1, {0, 0, 0}}, AxisGroup{2, {1, 2, 0}}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            3, 1, 1, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            4, 2, 2, 0,
+            {{SpeakerPoint{{0, 16384, 0}, 4}, SpeakerPoint{{32767, 16384, 0}, 5}, SpeakerPoint{{0, 32767, 0}, 6}, SpeakerPoint{{32767, 32767, 0}, 7}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{2, {0, 1, 0}}, AxisGroup{2, {2, 3, 0}}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            3, 1, 1, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        }
+        }}
+    },
+    LayoutGeometry{
+        0x40Fu, 13, 8,
+        {{0, 1, 2, 3, 4, 5, 6, 7, 0, 0, 0, 0, 0, 0, 0, 0}},
+        {{
+        RegionGeometry{
+            7, 3, 2, 1,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{{0, 32767, 0}, 4}, SpeakerPoint{{32767, 32767, 0}, 5}, SpeakerPoint{{7928, 16384, 32767}, 6}, SpeakerPoint{{24840, 16384, 32767}, 7}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{2, {3, 4, 0}}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{2, {5, 6, 0}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            7, 3, 2, 1,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{{0, 32767, 0}, 4}, SpeakerPoint{{32767, 32767, 0}, 5}, SpeakerPoint{{7928, 16384, 32767}, 6}, SpeakerPoint{{24840, 16384, 32767}, 7}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{2, {3, 4, 0}}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{2, {5, 6, 0}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            7, 3, 2, 1,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{{0, 32767, 0}, 4}, SpeakerPoint{{32767, 32767, 0}, 5}, SpeakerPoint{{7928, 16384, 32767}, 6}, SpeakerPoint{{24840, 16384, 32767}, 7}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{2, {3, 4, 0}}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{2, {5, 6, 0}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            5, 3, 2, 1,
+            {{SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{{0, 32767, 0}, 4}, SpeakerPoint{{32767, 32767, 0}, 5}, SpeakerPoint{{7928, 16384, 32767}, 6}, SpeakerPoint{{24840, 16384, 32767}, 7}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{1, {0, 0, 0}}, AxisGroup{2, {1, 2, 0}}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{2, {3, 4, 0}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            5, 3, 1, 1,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{{7928, 16384, 32767}, 6}, SpeakerPoint{{24840, 16384, 32767}, 7}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{2, {3, 4, 0}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            4, 3, 1, 1,
+            {{SpeakerPoint{{0, 32767, 0}, 4}, SpeakerPoint{{32767, 32767, 0}, 5}, SpeakerPoint{{7928, 16384, 32767}, 6}, SpeakerPoint{{24840, 16384, 32767}, 7}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{2, {0, 1, 0}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{2, {2, 3, 0}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        },
+        RegionGeometry{
+            3, 1, 1, 0,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        }
+        }}
+    },
+    LayoutGeometry{
+        0xA0Fu, 14, 10,
+        {{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0}},
+        {{
+        RegionGeometry{
+            9, 3, 2, 2,
+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{{0, 32767, 0}, 4}, SpeakerPoint{{32767, 32767, 0}, 5}, SpeakerPoint{{7928, 7928, 32767}, 6}, SpeakerPoint{{24840, 7928, 32767}, 7}, SpeakerPoint{{7928, 24840, 32767}, 8}, SpeakerPoint{{24840, 24840, 32767}, 9}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{2, {3, 4, 0}}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{2, {5, 6, 0}}, AxisGroup{2, {7, 8, 0}}, AxisGroup{}, AxisGroup{}}}
+        },
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+            {{SpeakerPoint{{0, 0, 0}, 0}, SpeakerPoint{{32767, 0, 0}, 1}, SpeakerPoint{{16384, 0, 0}, 2}, SpeakerPoint{{0, 5285, 0}, 8}, SpeakerPoint{{32767, 5285, 0}, 9}, SpeakerPoint{{7928, 7928, 32767}, 10}, SpeakerPoint{{24840, 7928, 32767}, 11}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}, SpeakerPoint{}}},
+            {{AxisGroup{3, {0, 2, 1}}, AxisGroup{2, {3, 4, 0}}, AxisGroup{}, AxisGroup{}}},
+            {{AxisGroup{2, {5, 6, 0}}, AxisGroup{}, AxisGroup{}, AxisGroup{}}}
+        }
+        }}
+    }
+}};
+
+inline constexpr const LayoutGeometry* find_layout(const std::uint32_t speaker_bitfield) noexcept {
+    for (const auto& layout : kLayouts) {
+        if (layout.speaker_bitfield == speaker_bitfield) {
+            return &layout;
+        }
+    }
+    return nullptr;
+}
+
+}  // namespace ejoc::speaker_tables
@@ -0,0 +1,495 @@
+#define EJOC_BUILD_DLL
+#include "eac3joc_core.h"
+#include "speaker_layouts.h"
+
+#include <algorithm>
+#include <array>
+#include <cmath>
+#include <cstddef>
+#include <cstdint>
+#include <cstdio>
+#include <new>
+
+namespace ejoc::speaker {
+
+using speaker_tables::AxisGroup;
+using speaker_tables::LayoutGeometry;
+using speaker_tables::RegionGeometry;
+
+constexpr double kPi = 3.141592653589793238462643383279502884;
+constexpr double kQ15Scale = 32768.0;
+constexpr double kQ15Max = 32767.0 / kQ15Scale;
+constexpr double kGainSnapThreshold = 1.0e-4;
+constexpr std::size_t kObjects = EJOC_MAX_OBJECTS;
+constexpr std::size_t kChannels = EJOC_OUTPUT_CHANNELS;
+constexpr std::size_t kBlock = EJOC_SPEAKER_BLOCK_SAMPLES;
+
+using PointGains = std::array<double, speaker_tables::kMaxPoints>;
+using ChannelGains = std::array<double, kChannels>;
+using ObjectChannelGains = std::array<ChannelGains, kObjects>;
+using RemainingCounts = std::array<std::array<std::uint32_t, kChannels>, kObjects>;
+
+inline double clamp(const double value, const double low, const double high) noexcept {
+    return value < low ? low : (value > high ? high : value);
+}
+
+inline double coordinate(const RegionGeometry& region, const std::size_t point,
+                         const std::size_t component) noexcept {
+    return static_cast<double>(region.points[point].coordinate_q15[component]) / kQ15Scale;
+}
+
+std::uint64_t expand_speaker_bitfield(const std::uint32_t compact) noexcept {
+    constexpr std::array<std::uint64_t, 22> expansions{{
+        0x00000003ULL, 0x00000004ULL, 0x00000008ULL, 0x00000030ULL,
+        0x000000C0ULL, 0x00000100ULL, 0x00000600ULL, 0x00001800ULL,
+        0x00006000ULL, 0x00018000ULL, 0x00060000ULL, 0x00180000ULL,
+        0x00600000ULL, 0x01800000ULL, 0x06000000ULL, 0x18000000ULL,
+        0x60000000ULL, 0x080000000ULL, 0x600000000ULL, 0x800000000ULL,
+        0x1000000000ULL, 0x2000000000ULL,
+    }};
+    std::uint64_t expanded = 0;
+    for (std::size_t bit_index = 0; bit_index < expansions.size(); ++bit_index) {
+        if ((compact & (1u << bit_index)) != 0) {
+            expanded |= expansions[bit_index];
+        }
+    }
+    return expanded;
+}
+
+inline int bit(const std::uint64_t value, const unsigned index) noexcept {
+    return static_cast<int>((value >> index) & 1ULL);
+}
+
+double layout_attenuation_db(const std::uint32_t compact) noexcept {
+    const std::uint64_t expanded = expand_speaker_bitfield(compact);
+    const int height_channels = 2 * (
+        bit(expanded, 13) + bit(expanded, 15) + bit(expanded, 17) +
+        bit(expanded, 19) + bit(expanded, 21));
+    const int floor_channels = bit(expanded, 8) + 2 * (
+        bit(expanded, 31) + bit(expanded, 4) + bit(expanded, 6) +
+        bit(expanded, 11) + bit(expanded, 25) + bit(expanded, 27) +
+        bit(expanded, 29) + bit(expanded, 33));
+    const double height_factor = std::min(static_cast<double>(height_channels) / 4.0, 1.0);
+    const double floor_factor = std::min(static_cast<double>(floor_channels) / 4.0, 1.0);
+    return -std::max(4.5 - 1.5 * height_factor - 3.0 * floor_factor, 0.0);
+}
+
+int floor_y_exponent(const std::uint32_t compact) noexcept {
+    const std::uint32_t low = static_cast<std::uint32_t>(expand_speaker_bitfield(compact));
+    return ((low & 0x130u) != 0 && (low & 0x18C0u) == 0) ? 1 : 0;
+}
+
+inline void equal_power_pair(const double position, double& lower, double& upper) noexcept {
+    const double angle = (kPi * 0.5) * position;
+    lower = std::cos(angle);
+    upper = std::sin(angle);
+}
+
+void axis0_gains(const RegionGeometry& region,
+                 const std::array<AxisGroup, speaker_tables::kMaxGroups>& groups,
+                 const std::uint8_t group_count,
+                 const double value,
+                 PointGains& output) noexcept {
+    output.fill(0.0);
+    for (std::size_t row = 0; row < group_count; ++row) {
+        const auto& group = groups[row];
+        if (group.size == 0) {
+            continue;
+        }
+        const std::size_t first = group.indices[0];
+        const std::size_t last = group.indices[group.size - 1];
+        const double first_value = coordinate(region, first, 0);
+        const double last_value = coordinate(region, last, 0);
+        if (value <= first_value) {
+            output[first] = 1.0;
+            continue;
+        }
+        if (value >= last_value) {
+            output[last] = 1.0;
+            continue;
+        }
+        for (std::size_t index = 0; index + 1 < group.size; ++index) {
+            const std::size_t lower_index = group.indices[index];
+            const std::size_t upper_index = group.indices[index + 1];
+            const double lower_value = coordinate(region, lower_index, 0);
+            const double upper_value = coordinate(region, upper_index, 0);
+            if (value > lower_value && value <= upper_value) {
+                const double position = (value - lower_value) / (upper_value - lower_value);
+                equal_power_pair(position, output[lower_index], output[upper_index]);
+                break;
+            }
+        }
+    }
+}
+
+void axis1_gains(const RegionGeometry& region,
+                 const std::array<AxisGroup, speaker_tables::kMaxGroups>& groups,
+                 const std::uint8_t group_count,
+                 const double value,
+                 PointGains& output) noexcept {
+    output.fill(0.0);
+    if (group_count == 0) {
+        return;
+    }
+    const auto& first_group = groups[0];
+    const auto& last_group = groups[group_count - 1];
+    const double first_value = coordinate(region, first_group.indices[0], 1);
+    const double last_value = coordinate(region, last_group.indices[0], 1);
+    if (value <= first_value) {
+        for (std::size_t index = 0; index < first_group.size; ++index) {
+            output[first_group.indices[index]] = 1.0;
+        }
+        return;
+    }
+    if (value > last_value) {
+        for (std::size_t index = 0; index < last_group.size; ++index) {
+            output[last_group.indices[index]] = 1.0;
+        }
+        return;
+    }
+    for (std::size_t row = 0; row + 1 < group_count; ++row) {
+        const auto& lower_group = groups[row];
+        const auto& upper_group = groups[row + 1];
+        const double lower_value = coordinate(region, lower_group.indices[0], 1);
+        const double upper_value = coordinate(region, upper_group.indices[0], 1);
+        if (value >= lower_value && value <= upper_value) {
+            const double position = (value - lower_value) / (upper_value - lower_value);
+            double lower_gain = 0.0;
+            double upper_gain = 0.0;
+            equal_power_pair(position, lower_gain, upper_gain);
+            for (std::size_t index = 0; index < lower_group.size; ++index) {
+                output[lower_group.indices[index]] = lower_gain;
+            }
+            for (std::size_t index = 0; index < upper_group.size; ++index) {
+                output[upper_group.indices[index]] = upper_gain;
+            }
+            return;
+        }
+    }
+}
+
+void plane_gains(const RegionGeometry& region,
+                 const std::array<AxisGroup, speaker_tables::kMaxGroups>& groups,
+                 const std::uint8_t group_count,
+                 const double u,
+                 const double v,
+                 const std::uint8_t mode,
+                 PointGains& output) noexcept {
+    axis0_gains(region, groups, group_count, u, output);
+    if (mode >= 2) {
+        PointGains vertical{};
+        axis1_gains(region, groups, group_count, v, vertical);
+        for (std::size_t point = 0; point < region.point_count; ++point) {
+            output[point] *= vertical[point];
+        }
+    }
+}
+
+class Renderer {
+public:
+    explicit Renderer(const LayoutGeometry* layout) noexcept : layout_(layout) {
+        for (std::size_t standard = 0; standard < layout_->channel_count; ++standard) {
+            standard_index_for_internal_[layout_->standard_from_internal[standard]] =
+                static_cast<std::uint8_t>(standard);
+        }
+        attenuation_db_ = layout_attenuation_db(layout_->speaker_bitfield);
+        floor_y_exponent_ = floor_y_exponent(layout_->speaker_bitfield);
+        reset_state();
+    }
+
+    int reset() noexcept {
+        reset_state();
+        error_[0] = '\0';
+        return 0;
+    }
+
+    const char* last_error() const noexcept {
+        return error_[0] ? error_.data() : "";
+    }
+
+    int process(const float* input,
+                const std::uint32_t sample_count,
+                const std::uint32_t metadata_count,
+                const std::uint32_t* metadata_offsets,
+                const std::uint32_t* ramp_durations,
+                const std::uint16_t* positions_q15,
+                const std::uint8_t* region_indices,
+                const std::uint8_t* height_enabled,
+                const double* object_gains,
+                double* output) noexcept {
+        error_[0] = '\0';
+        if (!input || !output) {
+            return fail("null PCM pointer passed to ejoc_speaker_renderer_process");
+        }
+        if ((sample_count % kBlock) != 0) {
+            return fail("sample_count must be a multiple of 32");
+        }
+        if (metadata_count && (!metadata_offsets || !ramp_durations || !positions_q15)) {
+            return fail("metadata arrays are null while metadata_count is nonzero");
+        }
+        if (!validate_metadata(sample_count, metadata_count, metadata_offsets,
+                               positions_q15, region_indices, object_gains)) {
+            return -1;
+        }
+
+        std::fill(output, output + static_cast<std::size_t>(sample_count) * layout_->channel_count, 0.0);
+        const bool has_lfe = (layout_->speaker_bitfield & 0x4u) != 0;
+        const std::size_t total_blocks = sample_count / kBlock;
+        std::size_t event = 0;
+        for (std::size_t block = 0; block < total_blocks; ++block) {
+            while (event < metadata_count && aligned_block(metadata_offsets[event]) == block) {
+                apply_event(event, ramp_durations, positions_q15, region_indices,
+                            height_enabled, object_gains);
+                ++event;
+            }
+            mix_block(input, output, block, has_lfe);
+        }
+        while (event < metadata_count && aligned_block(metadata_offsets[event]) == total_blocks) {
+            apply_event(event, ramp_durations, positions_q15, region_indices,
+                        height_enabled, object_gains);
+            ++event;
+        }
+        if (event != metadata_count) {
+            return fail("metadata alignment produced an event outside this process call");
+        }
+        return 0;
+    }
+
+private:
+    void reset_state() noexcept {
+        for (auto& row : current_) row.fill(0.0);
+        for (auto& row : target_) row.fill(0.0);
+        for (auto& row : step_) row.fill(0.0);
+        for (auto& row : remaining_) row.fill(0);
+    }
+
+    int fail(const char* message) noexcept {
+        std::snprintf(error_.data(), error_.size(), "%s", message);
+        return -1;
+    }
+
+    bool validate_metadata(const std::uint32_t sample_count,
+                           const std::uint32_t metadata_count,
+                           const std::uint32_t* metadata_offsets,
+                           const std::uint16_t* positions_q15,
+                           const std::uint8_t* region_indices,
+                           const double* object_gains) noexcept {
+        for (std::size_t event = 0; event < metadata_count; ++event) {
+            if (metadata_offsets[event] > sample_count) {
+                fail("metadata offset exceeds sample_count");
+                return false;
+            }
+            if (event && metadata_offsets[event] < metadata_offsets[event - 1]) {
+                fail("metadata offsets must be nondecreasing");
+                return false;
+            }
+            for (std::size_t object = 0; object < kObjects; ++object) {
+                const std::size_t object_event = event * kObjects + object;
+                if (region_indices && region_indices[object_event] >= 7) {
+                    fail("region index is above 6");
+                    return false;
+                }
+                if (object_gains && !std::isfinite(object_gains[object_event])) {
+                    fail("object gain is not finite");
+                    return false;
+                }
+                const std::size_t coordinate_base = object_event * EJOC_SPEAKER_COORDINATES;
+                for (std::size_t component = 0; component < EJOC_SPEAKER_COORDINATES; ++component) {
+                    if (positions_q15[coordinate_base + component] > 32767u) {
+                        fail("Q15 object coordinate is above 32767");
+                        return false;
+                    }
+                }
+            }
+        }
+        return true;
+    }
+
+    static std::size_t aligned_block(const std::uint32_t sample) noexcept {
+        return (static_cast<std::size_t>(sample) + kBlock / 2 - 1) / kBlock;
+    }
+
+    static std::uint32_t ramp_blocks(const std::uint32_t duration) noexcept {
+        return static_cast<std::uint32_t>(
+            (static_cast<std::size_t>(duration) + kBlock / 2 - 1) / kBlock);
+    }
+
+    void render_point(const std::uint16_t* position,
+                      const std::uint8_t region_index,
+                      const bool enable_height,
+                      const double object_gain,
+                      ChannelGains& output) const noexcept {
+        output.fill(0.0);
+        const auto& region = layout_->regions[region_index];
+        const double u = static_cast<double>(position[0]) / kQ15Scale;
+        const double v = static_cast<double>(position[1]) / kQ15Scale;
+        const double w = static_cast<double>(position[2]) / kQ15Scale;
+        const double floor_v = clamp(std::ldexp(v, floor_y_exponent_), 0.0, 1.0);
+        PointGains floor{};
+        plane_gains(region, region.axis0_groups, region.axis0_group_count,
+                    u, floor_v, region.mode, floor);
+        PointGains point = floor;
+        if (region.mode == 3) {
+            PointGains height{};
+            plane_gains(region, region.axis1_groups, region.axis1_group_count,
+                        u, v, 3, height);
+            const double z = enable_height ? clamp(w, 0.0, kQ15Max) : 0.0;
+            if (z >= kQ15Max) {
+                point = height;
+            } else if (z > 0.0) {
+                double floor_weight = 0.0;
+                double height_weight = 0.0;
+                equal_power_pair(z, floor_weight, height_weight);
+                for (std::size_t index = 0; index < region.point_count; ++index) {
+                    point[index] = floor[index] * floor_weight + height[index] * height_weight;
+                }
+            }
+        }
+        const double y_term = clamp(v / 0.6, 0.0, 1.0);
+        const double z_term = clamp((w - 0.2) / 0.8, 0.0, 1.0);
+        const double amount = clamp(y_term + z_term, 0.0, 1.0);
+        const double gain = std::pow(10.0, attenuation_db_ * amount / 20.0) * object_gain;
+        for (std::size_t index = 0; index < region.point_count; ++index) {
+            output[region.points[index].speaker_id] = point[index] * gain;
+        }
+    }
+
+    void apply_event(const std::size_t event,
+                     const std::uint32_t* ramp_durations,
+                     const std::uint16_t* positions_q15,
+                     const std::uint8_t* region_indices,
+                     const std::uint8_t* height_enabled,
+                     const double* object_gains) noexcept {
+        const std::uint32_t blocks = ramp_blocks(ramp_durations[event]);
+        for (std::size_t object = 0; object < kObjects; ++object) {
+            const std::size_t object_event = event * kObjects + object;
+            const auto* position = positions_q15 + object_event * EJOC_SPEAKER_COORDINATES;
+            const std::uint8_t region = region_indices ? region_indices[object_event] : 0;
+            const bool height = !height_enabled || height_enabled[object_event] != 0;
+            const double object_gain = object_gains ? object_gains[object_event] : 1.0;
+            ChannelGains next{};
+            render_point(position, region, height, object_gain, next);
+            for (std::size_t channel = 0; channel < layout_->channel_count; ++channel) {
+                const double difference = next[channel] - current_[object][channel];
+                target_[object][channel] = next[channel];
+                if (std::abs(difference) >= kGainSnapThreshold && blocks != 0) {
+                    step_[object][channel] = difference / static_cast<double>(blocks);
+                    remaining_[object][channel] = blocks;
+                } else {
+                    current_[object][channel] = next[channel];
+                    step_[object][channel] = 0.0;
+                    remaining_[object][channel] = 0;
+                }
+            }
+        }
+    }
+
+    void mix_block(const float* input, double* output, const std::size_t block,
+                   const bool has_lfe) noexcept {
+        const std::size_t start = block * kBlock;
+        if (has_lfe) {
+            for (std::size_t sample = 0; sample < kBlock; ++sample) {
+                output[(start + sample) * layout_->channel_count + 3] =
+                    static_cast<double>(input[(start + sample) * EJOC_OUTPUT_CHANNELS]);
+            }
+        }
+        for (std::size_t object = 0; object < kObjects; ++object) {
+            for (std::size_t internal = 0; internal < layout_->channel_count; ++internal) {
+                const bool active = remaining_[object][internal] != 0;
+                const double fixed_gain = target_[object][internal];
+                if (!active && fixed_gain == 0.0) {
+                    continue;
+                }
+                const std::size_t standard = standard_index_for_internal_[internal];
+                for (std::size_t sample = 0; sample < kBlock; ++sample) {
+                    const double gain = active
+                        ? current_[object][internal] +
+                          (static_cast<double>(sample) / static_cast<double>(kBlock)) *
+                          step_[object][internal]
+                        : fixed_gain;
+                    output[(start + sample) * layout_->channel_count + standard] +=
+                        static_cast<double>(
+                            input[(start + sample) * EJOC_OUTPUT_CHANNELS + object + 1]) * gain;
+                }
+                if (active) {
+                    current_[object][internal] += step_[object][internal];
+                    --remaining_[object][internal];
+                    if (remaining_[object][internal] == 0) {
+                        current_[object][internal] = target_[object][internal];
+                    }
+                } else {
+                    current_[object][internal] = target_[object][internal];
+                }
+            }
+        }
+    }
+
+    const LayoutGeometry* layout_;
+    double attenuation_db_{};
+    int floor_y_exponent_{};
+    ObjectChannelGains current_{};
+    ObjectChannelGains target_{};
+    ObjectChannelGains step_{};
+    RemainingCounts remaining_{};
+    std::array<std::uint8_t, kChannels> standard_index_for_internal_{};
+    std::array<char, 256> error_{};
+};
+
+}  // namespace ejoc::speaker
+
+extern "C" {
+
+uint32_t EJOC_CALL ejoc_speaker_layout_channel_count(const uint32_t speaker_bitfield) {
+    const auto* layout = ejoc::speaker_tables::find_layout(speaker_bitfield);
+    return layout ? layout->channel_count : 0;
+}
+
+ejoc_speaker_renderer_handle EJOC_CALL ejoc_speaker_renderer_create(
+    const uint32_t speaker_bitfield) {
+    const auto* layout = ejoc::speaker_tables::find_layout(speaker_bitfield);
+    if (!layout) {
+        return nullptr;
+    }
+    return new (std::nothrow) ejoc::speaker::Renderer(layout);
+}
+
+void EJOC_CALL ejoc_speaker_renderer_destroy(ejoc_speaker_renderer_handle handle) {
+    delete static_cast<ejoc::speaker::Renderer*>(handle);
+}
+
+int EJOC_CALL ejoc_speaker_renderer_reset(ejoc_speaker_renderer_handle handle) {
+    if (!handle) {
+        return -1;
+    }
+    return static_cast<ejoc::speaker::Renderer*>(handle)->reset();
+}
+
+const char* EJOC_CALL ejoc_speaker_renderer_last_error(ejoc_speaker_renderer_handle handle) {
+    if (!handle) {
+        return "speaker renderer handle is null";
+    }
+    return static_cast<ejoc::speaker::Renderer*>(handle)->last_error();
+}
+
+int EJOC_CALL ejoc_speaker_renderer_process(
+    ejoc_speaker_renderer_handle handle,
+    const float* objects16_interleaved,
+    const uint32_t sample_count,
+    const uint32_t metadata_count,
+    const uint32_t* metadata_offsets,
+    const uint32_t* ramp_durations,
+    const uint16_t* positions_q15,
+    const uint8_t* region_indices,
+    const uint8_t* height_enabled,
+    const double* object_gains,
+    double* output_interleaved) {
+    if (!handle) {
+        return -1;
+    }
+    return static_cast<ejoc::speaker::Renderer*>(handle)->process(
+        objects16_interleaved, sample_count, metadata_count,
+        metadata_offsets, ramp_durations, positions_q15,
+        region_indices, height_enabled, object_gains, output_interleaved);
+}
+
+}  // extern "C"
@@ -0,0 +1,62 @@
+#include "speaker/speaker_step.h"
+
+#include <cstdio>
+
+namespace joc::speaker {
+
+Status step(SpeakerStep* context, const std::vector<float>& objects16_planar,
+            const oamd::OamdUpdate* update, std::string* error) {
+    if (context == nullptr || context->handle == nullptr) {
+        return Status::fail(JOC_ERR_STATE, stage::kRender, "speaker renderer is not open");
+    }
+    if (objects16_planar.size() !=
+        static_cast<std::size_t>(JOC_OUTPUT_CHANNELS) * JOC_FRAME_SAMPLES) {
+        return Status::fail(JOC_ERR_INVALID_ARGUMENT, stage::kRender,
+                            "objects16 must be [16][1536]");
+    }
+    context->interleaved.assign(static_cast<std::size_t>(JOC_FRAME_SAMPLES) * JOC_OUTPUT_CHANNELS,
+                                0.0f);
+    for (std::size_t n = 0; n < JOC_FRAME_SAMPLES; ++n) {
+        for (std::size_t c = 0; c < JOC_OUTPUT_CHANNELS; ++c) {
+            context->interleaved[n * JOC_OUTPUT_CHANNELS + c] =
+                objects16_planar[c * JOC_FRAME_SAMPLES + n];
+        }
+    }
+    context->output.assign(
+        static_cast<std::size_t>(JOC_FRAME_SAMPLES) * context->layout.channel_count, 0.0);
+
+    context->last_had_payload = update != nullptr;
+    std::uint32_t ramp = 0;
+    if (update != nullptr) {
+        context->state.apply(*update);
+        ramp = update->ramp_duration_samples;
+        context->last_block_offset = update->block_offset_samples;
+        context->last_ramp_duration = update->ramp_duration_samples;
+        context->last_object_count = update->object_count;
+    }
+
+    std::uint16_t positions[oamd::kObjects][3] = {};
+    context->state.object_positions_q15(positions);
+    // A frame without OAMD must not touch the gains at all (no event), otherwise a
+    // pending ramp would snap - matching the reference exactly.
+    const std::uint32_t event_count = context->last_had_payload ? 1u : 0u;
+    const std::uint32_t offset = context->metadata_offset;
+    const int result = ejoc_speaker_renderer_process(
+        context->handle, context->interleaved.data(), JOC_FRAME_SAMPLES, event_count,
+        event_count != 0u ? &offset : nullptr, event_count != 0u ? &ramp : nullptr,
+        event_count != 0u ? &positions[0][0] : nullptr, nullptr, nullptr, nullptr,
+        context->output.data());
+    if (result != 0) {
+        const char* message = ejoc_speaker_renderer_last_error(context->handle);
+        const std::string text =
+            "ejoc_speaker_renderer_process failed (" + std::to_string(result) + "): " +
+            (message != nullptr ? message : "unknown");
+        if (error != nullptr) {
+            *error = text;
+        }
+        return Status::fail(JOC_ERR_RENDER_FAILED, stage::kRender, text);
+    }
+    return Status::success();
+}
+
+}  // namespace joc::speaker
@@ -0,0 +1,31 @@
+
+#pragma once
+
+#include <cstdint>
+#include <string>
+#include <vector>
+
+#include "eac3joc_core.h"
+#include "foundation/status.h"
+#include "oamd/oamd_parser.h"
+#include "speaker/speaker_layout_lookup.h"
+
+namespace joc::speaker {
+
+struct SpeakerStep {
+    ejoc_speaker_renderer_handle handle = nullptr;
+    LayoutInfo layout{};
+    oamd::OamdState state;
+    std::uint32_t metadata_offset = 1473;
+    std::vector<float> interleaved;
+    std::vector<double> output;
+    std::uint32_t last_block_offset = 0;
+    std::uint32_t last_ramp_duration = 0;
+    std::uint32_t last_object_count = 0;
+    bool last_had_payload = false;
+};
+
+Status step(SpeakerStep* context, const std::vector<float>& objects16_planar,
+            const oamd::OamdUpdate* update, std::string* error);
+
+}  // namespace joc::speaker