Initial public release of JustOneCacophony
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TheM14
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"""生成 25 声道 RF64 ADM BWF 及其 axml、chna、dbmd 元数据。
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输出由 10 声道 7.1.2 bed 和 15 路对象组成；RF64 尺寸字段在写入完成后回填。
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"""
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import struct
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import numpy as np
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import xml.etree.ElementTree as ET
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NS = "urn:ebu:metadata-schema:ebuCore_2016"
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XSI = "http://www.w3.org/2001/XMLSchema-instance"
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BED_NAMES = ["RoomCentricLeft", "RoomCentricRight", "RoomCentricCenter",
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"RoomCentricLFE", "RoomCentricLeftSideSurround",
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"RoomCentricRightSideSurround", "RoomCentricLeftRearSurround",
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"RoomCentricRightRearSurround", "RoomCentricLeftTopSurround",
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"RoomCentricRightTopSurround"]
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BED_LABELS = ["RC_L", "RC_R", "RC_C", "RC_LFE", "RC_Lss", "RC_Rss",
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"RC_Lrs", "RC_Rrs", "RC_Lts", "RC_Rts"]
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BED_POS = [(-1.0, 1.0, 0.0), (1.0, 1.0, 0.0), (0.0, 1.0, 0.0),
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(-1.0, 1.0, -1.0), (-1.0, 0.0, 0.0), (1.0, 0.0, 0.0),
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(-1.0, -1.0, 0.0), (1.0, -1.0, 0.0), (-1.0, 0.0, 1.0), (1.0, 0.0, 1.0)]
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N_OBJ = 15
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def q_to_adm_xyz(q1, q2, q3):
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posX = min(1.0, round(q1 * 62 / 32767.0) / 62.0)
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posY = min(1.0, round(q2 * 62 / 32767.0) / 62.0)
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posZ = round(q3 * 15 / 32767.0) / 15.0
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posZ = max(-1.0, min(1.0, posZ))
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return posX * 2 - 1, 1 - posY * 2, posZ
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def ts(seconds):
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s = int(seconds)
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frac = int(round((seconds - s) * 100000))
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if frac >= 100000:
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s += 1; frac = 0
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return f"{s // 3600:02d}:{s % 3600 // 60:02d}:{s % 60:02d}.{frac:05d}"
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def sub(parent, tag, attrib=None, text=None):
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e = ET.SubElement(parent, tag)
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if attrib:
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for k, v in attrib.items():
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e.set(k, v)
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if text is not None:
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e.text = text
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return e
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def add_refs(parent, tag, ids):
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for i in ids:
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sub(parent, tag, text=i)
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def obj_block(cf, bid, t, x, y, z, dur, interpolation=0.0):
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b = sub(cf, "audioBlockFormat", {
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"audioBlockFormatID": bid, "rtime": ts(t), "duration": ts(dur)})
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sub(b, "cartesian", text="1")
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for c, v in (("X", x), ("Y", y), ("Z", z)):
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if c == "Z" and v == 0:
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continue
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p = sub(b, "position", {"coordinate": c})
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p.text = f"{v:.10f}"
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sub(b, "jumpPosition", {"interpolationLength": f"{interpolation:.5f}"}, text="1")
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def build_axml(obj_tracks, duration_sec):
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adm = ET.Element("ebuCoreMain", {
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"xmlns": NS, "xmlns:xsi": XSI,
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"xsi:schemaLocation": f"{NS} ebucore.xsd", "lang": "en"})
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core = sub(adm, "coreMetadata")
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fmt = sub(core, "format")
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af = sub(fmt, "audioFormatExtended")
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prog = sub(af, "audioProgramme", {
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"audioProgrammeID": "APR_1001", "audioProgrammeName": "EAC3JOC_Export",
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"start": ts(0), "end": ts(duration_sec)})
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add_refs(prog, "audioContentIDRef", ("ACO_1001", "ACO_1002"))
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bc = sub(af, "audioContent", {"audioContentID": "ACO_1001",
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"audioContentName": "EAC3JOC_Master_Content"})
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add_refs(bc, "audioObjectIDRef", ["AO_1001"])
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sub(bc, "dialogue", {"mixedContentKind": "0"})
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oc = sub(af, "audioContent", {"audioContentID": "ACO_1002",
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"audioContentName": "Objects"})
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add_refs(oc, "audioObjectIDRef", ["AO_%04x" % (0x100b + i) for i in range(N_OBJ)])
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sub(oc, "dialogue", {"mixedContentKind": "0"})
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bed_o = sub(af, "audioObject", {"audioObjectID": "AO_1001", "audioObjectName": "Bed",
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"start": ts(0), "duration": ts(duration_sec)})
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sub(bed_o, "audioPackFormatIDRef", text="AP_00011001")
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add_refs(bed_o, "audioTrackUIDRef", ["ATU_%08x" % (i + 1) for i in range(10)])
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for i in range(N_OBJ):
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o = sub(af, "audioObject", {"audioObjectID": "AO_%04x" % (0x100b + i),
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"audioObjectName": f"Audio Object {i+1}",
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"start": ts(0), "duration": ts(duration_sec)})
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sub(o, "audioPackFormatIDRef", text="AP_0003%04x" % (0x1001 + i))
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add_refs(o, "audioTrackUIDRef", ["ATU_%08x" % (i + 11)])
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bp = sub(af, "audioPackFormat", {"audioPackFormatID": "AP_00011001",
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"audioPackFormatName": "EAC3JOCBedPack",
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"typeDefinition": "DirectSpeakers", "typeLabel": "0001"})
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add_refs(bp, "audioChannelFormatIDRef", ["AC_0001%04x" % (0x1001 + i) for i in range(10)])
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for i in range(N_OBJ):
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pk = sub(af, "audioPackFormat", {"audioPackFormatID": "AP_0003%04x" % (0x1001 + i),
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"audioPackFormatName": f"JOC_Object_{i+1}",
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"typeDefinition": "Objects", "typeLabel": "0003"})
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add_refs(pk, "audioChannelFormatIDRef", ["AC_0003%04x" % (0x1001 + i)])
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for i in range(10):
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cf = sub(af, "audioChannelFormat", {"audioChannelFormatID": "AC_0001%04x" % (0x1001 + i),
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"audioChannelFormatName": BED_NAMES[i],
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"typeDefinition": "DirectSpeakers", "typeLabel": "0001"})
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b = sub(cf, "audioBlockFormat", {"audioBlockFormatID": "AB_0001%04x_00000001" % (0x1001 + i)})
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sub(b, "cartesian", text="1")
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x, y, z = BED_POS[i]
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for c, v in (("X", x), ("Y", y), ("Z", z)):
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if c == "Z" and v == 0:
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continue
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p = sub(b, "position", {"coordinate": c})
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p.text = f"{v:.10f}"
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sub(b, "speakerLabel", text=BED_LABELS[i])
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for i, (oname, kfs) in enumerate(obj_tracks):
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cf = sub(af, "audioChannelFormat", {"audioChannelFormatID": "AC_0003%04x" % (0x1001 + i),
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"audioChannelFormatName": oname,
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"typeDefinition": "Objects", "typeLabel": "0003"})
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for k, keyframe in enumerate(kfs):
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t, x, y, z, dur = keyframe[:5]
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interpolation = keyframe[5] if len(keyframe) > 5 else 0.0
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obj_block(cf, "AB_0003%04x_%08x" % (0x1001 + i, k + 1),
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t, x, y, z, dur, interpolation)
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for i in range(10):
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t = sub(af, "audioTrackUID", {"UID": "ATU_%08x" % (i + 1),
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"bitDepth": "24", "sampleRate": "48000"})
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sub(t, "audioTrackFormatIDRef", text="AT_0001%04x_01" % (0x1001 + i))
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sub(t, "audioPackFormatIDRef", text="AP_00011001")
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for i in range(N_OBJ):
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t = sub(af, "audioTrackUID", {"UID": "ATU_%08x" % (i + 11),
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"bitDepth": "24", "sampleRate": "48000"})
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sub(t, "audioTrackFormatIDRef", text="AT_0003%04x_01" % (0x1001 + i))
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sub(t, "audioPackFormatIDRef", text="AP_0003%04x" % (0x1001 + i))
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for i in range(10):
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tf = sub(af, "audioTrackFormat", {"audioTrackFormatID": "AT_0001%04x_01" % (0x1001 + i),
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"audioTrackFormatName": "PCM_" + BED_NAMES[i],
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"formatDefinition": "PCM", "formatLabel": "0001"})
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sub(tf, "audioStreamFormatIDRef", text="AS_0001%04x" % (0x1001 + i))
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for i in range(N_OBJ):
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tf = sub(af, "audioTrackFormat", {"audioTrackFormatID": "AT_0003%04x_01" % (0x1001 + i),
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"audioTrackFormatName": "PCM_JOC_Object_%d" % (i + 1),
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"formatDefinition": "PCM", "formatLabel": "0001"})
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sub(tf, "audioStreamFormatIDRef", text="AS_0003%04x" % (0x1001 + i))
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for i in range(10):
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sf = sub(af, "audioStreamFormat", {"audioStreamFormatID": "AS_0001%04x" % (0x1001 + i),
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"audioStreamFormatName": "PCM_" + BED_NAMES[i],
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"formatDefinition": "PCM", "formatLabel": "0001"})
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sub(sf, "audioChannelFormatIDRef", text="AC_0001%04x" % (0x1001 + i))
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sub(sf, "audioPackFormatIDRef", text="AP_00011001")
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sub(sf, "audioTrackFormatIDRef", text="AT_0001%04x_01" % (0x1001 + i))
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for i in range(N_OBJ):
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sf = sub(af, "audioStreamFormat", {"audioStreamFormatID": "AS_0003%04x" % (0x1001 + i),
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"audioStreamFormatName": "PCM_JOC_Object_%d" % (i + 1),
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"formatDefinition": "PCM", "formatLabel": "0001"})
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sub(sf, "audioChannelFormatIDRef", text="AC_0003%04x" % (0x1001 + i))
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sub(sf, "audioPackFormatIDRef", text="AP_0003%04x" % (0x1001 + i))
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sub(sf, "audioTrackFormatIDRef", text="AT_0003%04x_01" % (0x1001 + i))
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return ET.tostring(adm, encoding="utf-8", xml_declaration=True)
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def build_chna():
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out = bytearray()
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out += struct.pack("<HH", 25, 25)
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for i in range(10):
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out += struct.pack("<H", i + 1)
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out += ("ATU_%08x" % (i + 1)).encode()
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out += ("AT_0001%04x_01" % (0x1001 + i)).encode()
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out += b"AP_00011001" + b"\x00"
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for i in range(N_OBJ):
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out += struct.pack("<H", i + 11)
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out += ("ATU_%08x" % (i + 11)).encode()
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out += ("AT_0003%04x_01" % (0x1001 + i)).encode()
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out += ("AP_0003%04x" % (0x1001 + i)).encode() + b"\x00"
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return bytes(out)
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def _checksum(seg):
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s = len(seg)
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for b in seg:
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s += b
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return (~s + 1) & 0xFF
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def build_dbmd(object_count=25):
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out = bytearray(struct.pack("<I", 0x01000006))
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dd = bytearray(96)
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dd[1] = 0x47
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dd[5] = 0x60
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dd[8] = 0x24; dd[9] = 0x24
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out.append(7); out += struct.pack("<H", 96); out += bytes(dd)
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out.append(_checksum(dd))
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at = bytearray(248)
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c0 = b"Created with EAC3JOC"; c1 = b"EAC3JOC Python Renderer"
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at[0:len(c0)] = c0
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at[32:32 + len(c1)] = c1
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at[96], at[97], at[98] = 2, 1, 0
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at[103] = 0x03
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at[106] = 0x01
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at[111] = 0x22; at[112] = 0xFF
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out.append(9); out += struct.pack("<H", 248); out += bytes(at)
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out.append(_checksum(at))
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ob = bytearray(5 + 262 + object_count)
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ob[0:4] = struct.pack("<I", 0xF8726FBD)
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ob[4] = object_count
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for i in range(5 + 262, len(ob)):
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ob[i] = 0x84
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out.append(10); out += struct.pack("<H", len(ob)); out += bytes(ob)
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out.append(_checksum(ob))
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out += b"\x00\x00"
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return bytes(out)
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class Sink25:
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def __init__(self, path, channels, rate):
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self.ch = channels; self.rate = rate; self.frames = 0
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self.fp = open(path, "wb+")
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self.fp.write(b"RF64" + struct.pack("<I", 0xFFFFFFFF) + b"WAVE")
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self._chunk(b"ds64", b"\x00" * 64)
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self._chunk(b"fmt ", self._fmt())
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self._chunk(b"data", b"")
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def _chunk(self, cid, body):
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self.fp.write(cid + struct.pack("<I", len(body)) + body)
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if len(body) & 1:
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self.fp.write(b"\x00")
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def _fmt(self):
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return struct.pack("<HHIIHH", 1, self.ch, self.rate,
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self.rate * self.ch * 3, self.ch * 3, 24)
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def write_block(self, arr):
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arr = arr.reshape(-1, self.ch)
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i24 = (np.clip(arr, -1.0, 1.0) * 8388607.0).astype(np.int32)
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self.fp.write(i24.view(np.uint8).reshape(-1, 4)[:, :3].tobytes())
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self.frames += arr.shape[0]
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def finalize(self, axml_bytes, chna_bytes, dbmd_bytes):
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data_len = self.frames * self.ch * 3
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self._chunk(b"axml", axml_bytes)
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self._chunk(b"chna", chna_bytes)
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self._chunk(b"dbmd", dbmd_bytes)
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self.fp.seek(0, 2); total = self.fp.tell()
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self.fp.seek(0); head = self.fp.read()
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m = head.find(b"data")
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if m >= 0:
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self.fp.seek(m + 4); self.fp.write(struct.pack("<I", data_len))
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m = head.find(b"ds64")
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if m >= 0:
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self.fp.seek(m + 8)
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self.fp.write(struct.pack("<QQQI", total - 8, data_len, self.frames, 0))
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self.fp.flush()
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self.fp.close()
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def build_master(out_path, bed_mm, obj_mm, kf_tracks, duration_sec, rate=48000,
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block=480000):
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n = min(bed_mm.shape[0], obj_mm.shape[0])
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try:
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from . import adm_serializer
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except ImportError:
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import adm_serializer
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serial_axml = adm_serializer.build_axml
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axml = serial_axml(kf_tracks, duration_sec)
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chna = build_chna()
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dbmd = build_dbmd(25)
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sink = Sink25(out_path, 25, rate)
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for st in range(0, n, block):
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en = min(n, st + block)
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blk = np.hstack((np.asarray(bed_mm[st:en], dtype=np.float32),
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np.asarray(obj_mm[st:en, 1:16], dtype=np.float32)))
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sink.write_block(blk)
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sink.finalize(axml, chna, dbmd)
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print(f"master25 -> {out_path} ({duration_sec:.2f}s, 25ch, axml={len(axml)}B, "
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f"chna={len(chna)}B, dbmd={len(dbmd)}B)")
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