def test_find_headers_at():
creation_time = utils.to_mp4_time(datetime(2019, 9, 15, 0, 0, 0))
modification_time = utils.to_mp4_time(datetime(2019, 9, 16, 0, 0, 0))
samples_sizes = [198297, 127477, 192476]
samples_offset = 10
trak = utils.make_trak(creation_time, modification_time,
samples_sizes, samples_offset)
# MOOV.TRAK.TKHD
tkhd = trak.boxes[0]
tkhd.track_id = 1
tkhd.width = [512, 0]
tkhd.height = [512, 0]
trak.refresh_box_size()
buffer = io.BytesIO(bytes(trak))
for (pos, box_size, box_type, header_size), \
box in zip(mp4.find_headers_at(buffer, {b'tkhd', b'mdia'},
offset=trak.header.header_size),
utils.find_boxes(trak.boxes, {b'tkhd', b'mdia'})):
assert pos < buffer.tell()
assert box_size == box.header.box_size
assert box_type == box.header.type
if isinstance(box.header, headers.FullBoxHeader):
assert header_size + 4 == box.header.header_size
else:
assert header_size == box.header.header_size
def test_get_shape_at():
creation_time = utils.to_mp4_time(datetime(2019, 9, 15, 0, 0, 0))
modification_time = utils.to_mp4_time(datetime(2019, 9, 16, 0, 0, 0))
samples_sizes = [198297, 127477, 192476]
samples_offset = 10
trak = utils.make_trak(creation_time, modification_time,
samples_sizes, samples_offset)
# MOOV.TRAK.TKHD
tkhd = trak.boxes[0]
tkhd.track_id = 1
tkhd.width = [512, 0]
tkhd.height = [512, 0]
trak.refresh_box_size()
buffer = io.BytesIO(bytes(trak))
assert mp4.get_shape_at(buffer, 0) == utils.get_shape(trak)
def test_make_trak_co64_explicit_offset():
creation_time = utils.to_mp4_time(datetime(2019, 9, 15, 0, 0, 0))
modification_time = utils.to_mp4_time(datetime(2019, 9, 16, 0, 0, 0))
samples_sizes = [198297, 127477, 192476]
samples_offsets = [
utils.MAX_UINT_32, utils.MAX_UINT_32 + 300000,
utils.MAX_UINT_32 + 2 * 300000
]
trak = utils.make_trak(creation_time, modification_time, samples_sizes,
samples_offsets)
# MOOV.TRAK.MDIA
mdia = trak.boxes[1]
# MOOV.TRAK.MDIA.MINF
minf = mdia.boxes[2]
# MOOV.TRAK.MDIA.MINF.STBL
stbl = minf.boxes[2]
# MOOV.TRAK.MDIA.MINF.STBL.CO64
stco = stbl.boxes[4]
stco.refresh_box_size()
assert stco.header.type == b"co64"
assert stco.header.box_size == 40
assert stco.header.version == 0
assert stco.header.flags == b"\x00\x00\x00"
assert stco.entry_count == 3
assert len(stco.entries) == 3
assert stco.entries[0].chunk_offset == utils.MAX_UINT_32
assert stco.entries[1].chunk_offset == utils.MAX_UINT_32 + 300000
assert stco.entries[2].chunk_offset == utils.MAX_UINT_32 + 2 * 300000
assert bytes(stco) == pack(
"uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:32, "
"uintbe:64, uintbe:64, uintbe:64", 40, b"co64", 0, b"\x00\x00\x00", 3,
utils.MAX_UINT_32, utils.MAX_UINT_32 + 300000,
utils.MAX_UINT_32 + 2 * 300000)
def test_get_sample_size_at():
creation_time = utils.to_mp4_time(datetime(2019, 9, 15, 0, 0, 0))
modification_time = utils.to_mp4_time(datetime(2019, 9, 16, 0, 0, 0))
samples_sizes = [198297, 127477, 192476]
samples_offset = 10
trak = utils.make_trak(creation_time, modification_time,
samples_sizes, samples_offset)
# MOOV.TRAK.TKHD
tkhd = trak.boxes[0]
tkhd.track_id = 1
tkhd.width = [512, 0]
tkhd.height = [512, 0]
trak.refresh_box_size()
buffer = io.BytesIO(bytes(trak))
stbl_pos, _, _, _ = mp4.find_sample_table_at(buffer, 0)
sz, _ = mp4.get_sample_size_at(buffer, stbl_pos)
stbl = utils.get_sample_table(trak)
stsz = next(utils.find_boxes(stbl.boxes, {b"stsz"}))
assert (sz == [e.entry_size for e in stsz.samples]).all()
def test_find_sample_table_at():
creation_time = utils.to_mp4_time(datetime(2019, 9, 15, 0, 0, 0))
modification_time = utils.to_mp4_time(datetime(2019, 9, 16, 0, 0, 0))
samples_sizes = [198297, 127477, 192476]
samples_offset = 10
trak = utils.make_trak(creation_time, modification_time,
samples_sizes, samples_offset)
# MOOV.TRAK.TKHD
tkhd = trak.boxes[0]
tkhd.track_id = 1
tkhd.width = [512, 0]
tkhd.height = [512, 0]
trak.refresh_box_size()
buffer = io.BytesIO(bytes(trak))
_, box_size, box_type, header_size = mp4.find_sample_table_at(buffer, 0)
stbl = utils.get_sample_table(trak)
assert box_size == stbl.header.box_size
assert box_type == stbl.header.type
assert header_size == stbl.header.header_size
def test_make_trak():
creation_time = utils.to_mp4_time(datetime(2019, 9, 15, 0, 0, 0))
modification_time = utils.to_mp4_time(datetime(2019, 9, 16, 0, 0, 0))
samples_sizes = [198297, 127477, 192476]
samples_offset = 10
trak = utils.make_trak(creation_time, modification_time, samples_sizes,
samples_offset)
assert trak.header.type == b"trak"
assert len(trak.boxes) == 2
# MOOV.TRAK.TKHD
tkhd = trak.boxes[0]
assert tkhd.header.type == b"tkhd"
assert tkhd.header.version == 1
assert tkhd.header.flags == b"\x00\x00\x00"
assert tkhd.creation_time == creation_time
assert tkhd.modification_time == modification_time
assert tkhd.track_id == -1
assert tkhd.duration == 60
assert tkhd.layer == 0
assert tkhd.alternate_group == 0
assert tkhd.volume == [0, 0]
assert tkhd.matrix == [65536, 0, 0, 0, 65536, 0, 0, 0, 1073741824]
assert tkhd.width == -1
assert tkhd.height == -1
assert tkhd.is_audio is False
# MOOV.TRAK.MDIA
mdia = trak.boxes[1]
assert mdia.header.type == b"mdia"
assert len(mdia.boxes) == 3
# MOOV.TRAK.MDIA.MDHD
mdhd = mdia.boxes[0]
mdhd.refresh_box_size()
assert mdhd.header.type == b"mdhd"
assert mdhd.header.box_size == 44
assert mdhd.header.version == 1
assert mdhd.header.flags == b"\x00\x00\x00"
assert mdhd.creation_time == creation_time
assert mdhd.modification_time == modification_time
assert mdhd.timescale == 20
assert mdhd.duration == 60
assert mdhd.language == [21, 14, 4]
assert mdhd.pre_defined == 0
assert bytes(mdhd) == \
pack("uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:64, uintbe:64, uintbe:32, uintbe:64, "
"bits:1, uint:5, uint:5, uint:5, "
"bits:16",
44, b"mdhd", 1, b"\x00\x00\x00",
creation_time, modification_time, 20, 60,
0x1, 21, 14, 4,
b"\x00" * 2)
# MOOV.TRAK.MDIA.HDLR
hdlr = mdia.boxes[1]
hdlr.refresh_box_size()
assert hdlr.header.type == b"hdlr"
assert hdlr.header.box_size == 33
assert hdlr.header.version == 0
assert hdlr.header.flags == b"\x00\x00\x00"
assert hdlr.pre_defined == 0
assert hdlr.handler_type == b"____"
# TODO: validate the use of the name
assert hdlr.name == b"\0"
assert bytes(hdlr) == pack(
"uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:32, bytes:4, "
"bits:32, bits:32, bits:32, "
"bytes:1", 33, b"hdlr", 0, b"\x00\x00\x00", 0, b"____", b"\x00" * 4,
b"\x00" * 4, b"\x00" * 4, b"\0")
# MOOV.TRAK.MDIA.MINF
minf = mdia.boxes[2]
assert minf.header.type == b"minf"
assert len(minf.boxes) == 3
# MOOV.TRAK.MDIA.MINF._MHD (placeholder)
_mhd = minf.boxes[0]
_mhd.refresh_box_size()
assert _mhd.header.type == b"_mhd"
assert _mhd.header.box_size == 8
assert bytes(_mhd) == pack("uintbe:32, bytes:4", 8, b"_mhd")
# MOOV.TRAK.MDIA.MINF.DINF
dinf = minf.boxes[1]
assert dinf.header.type == b"dinf"
assert len(dinf.boxes) == 1
# MOOV.TRAK.MDIA.MINF.DINF.DREF
dref = dinf.boxes[0]
assert dref.header.type == b"dref"
assert dref.header.version == 0
assert dref.header.flags == b"\x00\x00\x00"
assert dref.entry_count == 1
assert len(dref.boxes) == 1
# MOOV.TRAK.MDIA.MINF.DINF.DREF.URL_
url_ = dref.boxes[0]
url_.refresh_box_size()
assert url_.header.type == b"url "
assert url_.header.box_size == 12
assert url_.header.version == 0
assert url_.header.flags == b"\x00\x00\x01"
assert url_.location is None
assert bytes(url_) == pack("uintbe:32, bytes:4, uintbe:8, bits:24", 12,
b"url ", 0, b"\x00\x00\x01")
# MOOV.TRAK.MDIA.MINF.STBL
stbl = minf.boxes[2]
assert stbl.header.type == b"stbl"
assert len(stbl.boxes) == 5
# MOOV.TRAK.MDIA.MINF.STBL.STSD
stsd = stbl.boxes[0]
stsd.refresh_box_size()
assert stsd.header.type == b"stsd"
assert stsd.header.box_size == 16
assert stsd.header.version == 0
assert stsd.header.flags == b"\x00\x00\x00"
assert stsd.entry_count == 0
assert bytes(stsd) == pack(
"uintbe:32, bytes:4, uintbe:8, bits:24, uintbe:32", 16, b"stsd", 0,
b"\x00\x00\x00", 0)
# MOOV.TRAK.MDIA.MINF.STBL.STTS
stts = stbl.boxes[1]
stts.refresh_box_size()
assert stts.header.type == b"stts"
assert stts.header.box_size == 24
assert stts.header.version == 0
assert stts.header.flags == b"\x00\x00\x00"
assert stts.entry_count == 1
assert len(stts.entries) == 1
assert stts.entries[0].sample_count == 3
assert stts.entries[0].sample_delta == 20
assert bytes(stts) == pack(
"uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:32, uintbe:32, uintbe:32", 24, b"stts", 0, b"\x00\x00\x00", 1,
3, 20)
# MOOV.TRAK.MDIA.MINF.STBL.STSZ
stsz = stbl.boxes[2]
stsz.refresh_box_size()
assert stsz.header.type == b"stsz"
assert stsz.header.box_size == 32
assert stsz.header.version == 0
assert stsz.header.flags == b"\x00\x00\x00"
assert stsz.sample_size == 0
assert stsz.sample_count == 3
assert len(stsz.samples) == 3
assert stsz.samples[0].entry_size == samples_sizes[0]
assert stsz.samples[1].entry_size == samples_sizes[1]
assert stsz.samples[2].entry_size == samples_sizes[2]
assert bytes(stsz) == pack(
"uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:32, uintbe:32, uintbe:32, uintbe:32, uintbe:32", 32, b"stsz",
0, b"\x00\x00\x00", 0, 3, samples_sizes[0], samples_sizes[1],
samples_sizes[2])
# MOOV.TRAK.MDIA.MINF.STBL.STSC
stsc = stbl.boxes[3]
stsc.refresh_box_size()
assert stsc.header.type == b"stsc"
assert stsc.header.box_size == 28
assert stsc.header.version == 0
assert stsc.header.flags == b"\x00\x00\x00"
assert stsc.entry_count == 1
assert len(stsc.entries) == 1
assert stsc.entries[0].first_chunk == 1
assert stsc.entries[0].samples_per_chunk == 1
assert stsc.entries[0].sample_description_index == 1
assert bytes(stsc) == pack(
"uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:32, "
"uintbe:32, uintbe:32, uintbe:32", 28, b"stsc", 0, b"\x00\x00\x00", 1,
1, 1, 1)
# MOOV.TRAK.MDIA.MINF.STBL.STCO
stco = stbl.boxes[4]
stco.refresh_box_size()
assert stco.header.type == b"stco"
assert stco.header.box_size == 28
assert stco.header.version == 0
assert stco.header.flags == b"\x00\x00\x00"
assert stco.entry_count == 3
assert len(stco.entries) == 3
assert stco.entries[0].chunk_offset == samples_offset
assert stco.entries[1].chunk_offset == samples_offset + sum(
samples_sizes[0:1])
assert stco.entries[2].chunk_offset == samples_offset + sum(
samples_sizes[0:2])
assert bytes(stco) == pack(
"uintbe:32, bytes:4, uintbe:8, bits:24, "
"uintbe:32, "
"uintbe:32, uintbe:32, uintbe:32", 28, b"stco", 0, b"\x00\x00\x00", 3,
samples_offset, samples_offset + sum(samples_sizes[0:1]),
samples_offset + sum(samples_sizes[0:2]))