# This template is based on
# http://www.usb.org/developers/docs/devclass_docs/audio10.pdf
# Chapter 4.3
audio_control_interface_descriptor = Template(
name='audio_control_interface_descriptor',
fields=[
SubDescriptor(
name='Standard AC interface descriptor',
descriptor_type=_DescriptorTypes.INTERFACE,
fields=[
UInt8(name='bInterfaceNumber', value=0x00),
UInt8(name='bAlternateSetting', value=0x00),
ElementCount(name='bNumEndpoints',
depends_on='endpoints',
length=8),
UInt8(name='bInterfaceClass', value=0x01,
fuzzable=False), # audio
UInt8(name='bInterfaceSubClass', value=0x01,
fuzzable=False), # audio control
UInt8(name='bInterfaceProtocol', value=0x00),
UInt8(name='iInterface', value=0x01),
]),
List(
name='Class-Specific AC interfaces',
fields=[
SubDescriptor(
name='header',
descriptor_type=_DescriptorTypes.CS_INTERFACE,
fields=[
BE32(name="duration", value=0x00000183),
BE32(name="reserved2", value=0x00000000),
BE32(name="reserved3", value=0x00000000),
BE16(name="layer", value=0x0000),
BE16(name="alternate_group", value=0x0001),
BE16(name="volume", value=0x0100),
BE16(name="reserved4", value=0x0000),
Static(name="matrix", value="""
000100000000000000000000000000000001000000000000000000000000
000040000000""".replace("\n", "").decode("hex")),
BE32(name="width", value=0x00000000),
BE32(name="height", value=0x00000000),
], fuzzable=False),
Mp4Box("edts", fields=[
Mp4FullBox("elst", fields=[
ElementCount(name="entry_count", depends_on="dataentries", length=32),
Container(name="dataentries", fields=[
EditListEntry(0x00000154, 0x00000400, 0x0001, 0x0000),
])
])
]),
Mp4Box("mdia", fields=[
Mp4FullBox("mdhd", fields=[
BE32(name="creation_time", value=0x00000000),
BE32(name="modification_time", value=0x00000000),
BE32(name="timescale", value=0x00005622),
BE32(name="duration", value=0x00002140),
BE16(name="language", value=0x55c4),
BE16(name="pre_defined", value=0x0000),
], fuzzable=False),
HdlrBox("soun", "SoundHandler"),
value_field,
flags=0,
fuzzable=fuzzable)
apev2container = Container(
name="apev2container",
fields=[
Static("APETAGEX"),
LE32(name="version", value=struct.unpack("<I", "2000")[0]),
SizeInBytes(name="size",
sized_field="items and footer",
length=32,
encoder=ENC_INT_LE),
ElementCount(depends_on="items",
length=32,
name="item count",
encoder=ENC_INT_LE),
LE32(name="flags", value=0xa0000000),
RandomBytes(name="reserved",
value="\x00" * 8,
min_length=8,
max_length=8),
Container(
name="items and footer",
fields=[
OneOf(
name="items",
fields=[
apev2textitem("Title", "Music Piece Title"),
apev2textitem(
"Subtitle",
UInt8(name='bNumConfigurations', value=0),
UInt8(name='bReserved', value=0)
])
# Configuration descriptor
# Section 9.6.3, page 265
configuration_descriptor = Template(
name='configuration_descriptor',
fields=[
UInt8(name='bLength', value=9),
UInt8(name='bDescriptorType', value=DescriptorType.configuration),
SizeInBytes(name='wTotalLength',
sized_field='/',
length=16,
encoder=ENC_INT_LE),
ElementCount(name='bNumInterfaces', depends_on='interfaces', length=8),
UInt8(name='bConfigurationValue', value=1),
UInt8(name='iConfiguration', value=0),
BitField(name='bmAttributes', value=0, length=8),
UInt8(name='bMaxPower', value=1),
List(name='interfaces',
fields=[
Container(
name='iface and eps',
fields=[
SubDescriptor(
name='interface_descriptor',
descriptor_type=DescriptorType.interface,
fields=[
UInt8(name='bInterfaceNumber', value=0),
UInt8(name='bAlternateSetting', value=0),