mirror of
https://github.com/SickGear/SickGear.git
synced 2024-12-23 03:03:38 +00:00
460 lines
16 KiB
Python
460 lines
16 KiB
Python
"""
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SWF (Macromedia/Adobe Flash) file parser.
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Documentation:
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- Alexis' SWF Reference:
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http://www.m2osw.com/swf_alexref.html
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- http://www.half-serious.com/swf/format/
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- http://www.anotherbigidea.com/javaswf/
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- http://www.gnu.org/software/gnash/
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Author: Victor Stinner
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Creation date: 29 october 2006
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"""
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from hachoir.parser import Parser
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from hachoir.field import (FieldSet, ParserError,
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Bit, Bits, UInt8, UInt16, Int32, UInt32, Int64, CString, Enum,
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Bytes, RawBytes, NullBits, String, SubFile)
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from hachoir.core.endian import LITTLE_ENDIAN, BIG_ENDIAN
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from hachoir.core.text_handler import textHandler, filesizeHandler
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from hachoir.core.tools import paddingSize, humanFrequency
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from hachoir.parser.image.common import RGB
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from hachoir.parser.image.jpeg import JpegChunk, JpegFile
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from hachoir.stream import StringInputStream, ConcatStream
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from hachoir.parser.common.deflate import Deflate, has_deflate
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from hachoir.parser.container.action_script import parseActionScript, parseABC
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import math
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# Maximum file size (50 MB)
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MAX_FILE_SIZE = 50 * 1024 * 1024
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TWIPS = 20
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class RECT(FieldSet):
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endian = BIG_ENDIAN
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def createFields(self):
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yield Bits(self, "nbits", 5)
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nbits = self["nbits"].value
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if not nbits:
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raise ParserError("SWF parser: Invalid RECT field size (0)")
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yield Bits(self, "xmin", nbits, "X minimum in twips")
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yield Bits(self, "xmax", nbits, "X maximum in twips")
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yield Bits(self, "ymin", nbits, "Y minimum in twips")
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yield Bits(self, "ymax", nbits, "Y maximum in twips")
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size = paddingSize(self.current_size, 8)
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if size:
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yield NullBits(self, "padding", size)
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def getWidth(self):
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return math.ceil(float(self["xmax"].value) / TWIPS)
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def getHeight(self):
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return math.ceil(float(self["ymax"].value) / TWIPS)
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def createDescription(self):
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return "Rectangle: %ux%u" % (self.getWidth(), self.getHeight())
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class FixedFloat16(FieldSet):
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def createFields(self):
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yield UInt8(self, "float_part")
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yield UInt8(self, "int_part")
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def createValue(self):
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return self["int_part"].value + float(self["float_part"].value) / 256
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def parseBackgroundColor(parent, size):
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yield RGB(parent, "color")
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def bit2hertz(field):
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return humanFrequency(5512.5 * (2 ** field.value))
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SOUND_CODEC_MP3 = 2
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SOUND_CODEC = {
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0: "RAW",
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1: "ADPCM",
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SOUND_CODEC_MP3: "MP3",
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3: "Uncompressed",
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6: "Nellymoser",
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}
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class SoundEnvelope(FieldSet):
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def createFields(self):
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yield UInt8(self, "count")
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for index in range(self["count"].value):
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yield UInt32(self, "mark44[]")
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yield UInt16(self, "level0[]")
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yield UInt16(self, "level1[]")
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def parseSoundBlock(parent, size):
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# TODO: Be able to get codec... Need to know last sound "def_sound[]" field
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# if not (...)sound_header:
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# raise ParserError("Sound block without header")
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if True: # sound_header == SOUND_CODEC_MP3:
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yield UInt16(parent, "samples")
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yield UInt16(parent, "left")
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size = (parent.size - parent.current_size) // 8
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if size:
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yield RawBytes(parent, "music_data", size)
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def parseStartSound(parent, size):
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yield UInt16(parent, "sound_id")
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yield Bit(parent, "has_in_point")
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yield Bit(parent, "has_out_point")
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yield Bit(parent, "has_loops")
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yield Bit(parent, "has_envelope")
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yield Bit(parent, "no_multiple")
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yield Bit(parent, "stop_playback")
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yield NullBits(parent, "reserved", 2)
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if parent["has_in_point"].value:
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yield UInt32(parent, "in_point")
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if parent["has_out_point"].value:
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yield UInt32(parent, "out_point")
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if parent["has_loops"].value:
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yield UInt16(parent, "loop_count")
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if parent["has_envelope"].value:
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yield SoundEnvelope(parent, "envelope")
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def parseDefineSound(parent, size):
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yield UInt16(parent, "sound_id")
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yield Bit(parent, "is_stereo")
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yield Bit(parent, "is_16bit")
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yield textHandler(Bits(parent, "rate", 2), bit2hertz)
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yield Enum(Bits(parent, "codec", 4), SOUND_CODEC)
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yield UInt32(parent, "sample_count")
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if parent["codec"].value == SOUND_CODEC_MP3:
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yield UInt16(parent, "len")
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size = (parent.size - parent.current_size) // 8
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if size:
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yield RawBytes(parent, "music_data", size)
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def parseSoundHeader(parent, size):
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yield Bit(parent, "playback_is_stereo")
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yield Bit(parent, "playback_is_16bit")
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yield textHandler(Bits(parent, "playback_rate", 2), bit2hertz)
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yield NullBits(parent, "reserved", 4)
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yield Bit(parent, "sound_is_stereo")
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yield Bit(parent, "sound_is_16bit")
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yield textHandler(Bits(parent, "sound_rate", 2), bit2hertz)
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yield Enum(Bits(parent, "codec", 4), SOUND_CODEC)
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yield UInt16(parent, "sample_count")
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if parent["codec"].value == 2:
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yield UInt16(parent, "latency_seek")
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class JpegHeader(FieldSet):
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endian = BIG_ENDIAN
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def createFields(self):
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count = 1
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while True:
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chunk = JpegChunk(self, "jpeg_chunk[]")
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yield chunk
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if 1 < count and chunk["type"].value in (JpegChunk.TAG_SOI, JpegChunk.TAG_EOI):
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break
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count += 1
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def parseJpeg(parent, size):
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yield UInt16(parent, "char_id", "Character identifier")
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size -= 2
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code = parent["code"].value
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if code != Tag.TAG_BITS:
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if code == Tag.TAG_BITS_JPEG3:
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yield UInt32(parent, "alpha_offset", "Character identifier")
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size -= 4
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addr = parent.absolute_address + parent.current_size + 16
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if parent.stream.readBytes(addr, 2) in (b"\xff\xdb", b"\xff\xd8"):
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header = JpegHeader(parent, "jpeg_header")
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yield header
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hdr_size = header.size // 8
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size -= hdr_size
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else:
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hdr_size = 0
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if code == Tag.TAG_BITS_JPEG3:
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img_size = parent["alpha_offset"].value - hdr_size
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else:
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img_size = size
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else:
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img_size = size
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yield SubFile(parent, "image", img_size, "JPEG picture", parser=JpegFile)
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if code == Tag.TAG_BITS_JPEG3:
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size = (parent.size - parent.current_size) // 8
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yield RawBytes(parent, "alpha", size, "Image data")
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def parseVideoFrame(parent, size):
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yield UInt16(parent, "stream_id")
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yield UInt16(parent, "frame_num")
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if 4 < size:
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yield RawBytes(parent, "video_data", size - 4)
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class Export(FieldSet):
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def createFields(self):
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yield UInt16(self, "object_id")
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yield CString(self, "name")
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def parseExport(parent, size):
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yield UInt16(parent, "count")
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for index in range(parent["count"].value):
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yield Export(parent, "export[]")
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def parseProductInfo(parent, size):
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yield Int32(parent, "product_id")
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yield Int32(parent, "edition")
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yield UInt8(parent, "major_version")
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yield UInt8(parent, "minor_version")
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yield Int64(parent, "build_number")
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yield Int64(parent, "compilation_date")
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def parseScriptLimits(parent, size):
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yield UInt16(parent, "max_recursion_limit")
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yield UInt16(parent, "timeout_seconds", "Seconds of processing until the SWF is considered 'stuck'")
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def parseSymbolClass(parent, size):
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yield UInt16(parent, "count")
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for index in range(parent["count"].value):
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yield UInt16(parent, "symbol_id[]")
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yield CString(parent, "symbol_name[]")
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def parseBinaryData(parent, size):
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yield UInt16(parent, "data_id")
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yield UInt32(parent, "reserved")
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if size > 6:
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yield RawBytes(parent, "data", size - 6)
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class Tag(FieldSet):
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TAG_BITS = 6
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TAG_BITS_JPEG2 = 32
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TAG_BITS_JPEG3 = 35
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TAG_DO_ABC_DEFINE = 82
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TAG_INFO = {
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# SWF version 1.0
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0: ("end[]", "End", None),
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1: ("show_frame[]", "Show frame", None),
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2: ("def_shape[]", "Define shape", None),
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3: ("free_char[]", "Free character", None),
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4: ("place_obj[]", "Place object", None),
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5: ("remove_obj[]", "Remove object", None),
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6: ("def_bits[]", "Define bits", parseJpeg),
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7: ("def_but[]", "Define button", None),
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8: ("jpg_table", "JPEG tables", None),
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9: ("bkgd_color[]", "Set background color", parseBackgroundColor),
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10: ("def_font[]", "Define font", None),
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11: ("def_text[]", "Define text", None),
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12: ("action[]", "Action script", parseActionScript),
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13: ("def_font_info[]", "Define font info", None),
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# SWF version 2.0
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14: ("def_sound[]", "Define sound", parseDefineSound),
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15: ("start_sound[]", "Start sound", parseStartSound),
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16: ("stop_sound[]", "Stop sound", None),
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17: ("def_but_sound[]", "Define button sound", None),
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18: ("sound_hdr", "Sound stream header", parseSoundHeader),
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19: ("sound_blk[]", "Sound stream block", parseSoundBlock),
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20: ("def_bits_lossless[]", "Define bits lossless", None),
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21: ("def_bits_jpeg2[]", "Define bits JPEG 2", parseJpeg),
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22: ("def_shape2[]", "Define shape 2", None),
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23: ("def_but_cxform[]", "Define button CXFORM", None),
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24: ("protect", "File is protected", None),
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# SWF version 3.0
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25: ("path_are_ps[]", "Paths are Postscript", None),
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26: ("place_obj2[]", "Place object 2", None),
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28: ("remove_obj2[]", "Remove object 2", None),
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29: ("sync_frame[]", "Synchronize frame", None),
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31: ("free_all[]", "Free all", None),
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32: ("def_shape3[]", "Define shape 3", None),
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33: ("def_text2[]", "Define text 2", None),
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34: ("def_but2[]", "Define button2", None),
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35: ("def_bits_jpeg3[]", "Define bits JPEG 3", parseJpeg),
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36: ("def_bits_lossless2[]", "Define bits lossless 2", None),
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39: ("def_sprite[]", "Define sprite", None),
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40: ("name_character[]", "Name character", None),
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41: ("product_info", "Generator product info", parseProductInfo),
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42: ("generator_text[]", "Generator text", None),
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43: ("frame_label[]", "Frame label", None),
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45: ("sound_hdr2[]", "Sound stream header2", parseSoundHeader),
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46: ("def_morph_shape[]", "Define morph shape", None),
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47: ("gen_frame[]", "Generate frame", None),
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48: ("def_font2[]", "Define font 2", None),
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49: ("tpl_command[]", "Template command", None),
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# SWF version 4.0
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37: ("def_text_field[]", "Define text field", None),
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38: ("def_quicktime_movie[]", "Define QuickTime movie", None),
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# SWF version 5.0
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50: ("def_cmd_obj[]", "Define command object", None),
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51: ("flash_generator", "Flash generator", None),
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52: ("gen_ext_font[]", "Gen external font", None),
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56: ("export[]", "Export", parseExport),
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57: ("import[]", "Import", None),
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58: ("ebnable_debug", "Enable debug", None),
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# SWF version 6.0
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59: ("do_init_action[]", "Do init action", None),
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60: ("video_str[]", "Video stream", None),
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61: ("video_frame[]", "Video frame", parseVideoFrame),
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62: ("def_font_info2[]", "Define font info 2", None),
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63: ("mx4[]", "MX4", None),
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64: ("enable_debug2", "Enable debugger 2", None),
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# SWF version 7.0
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65: ("script_limits[]", "Script limits", parseScriptLimits),
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66: ("tab_index[]", "Set tab index", None),
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# SWF version 8.0
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69: ("file_attr[]", "File attributes", None),
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70: ("place_obj3[]", "Place object 3", None),
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71: ("import2[]", "Import a definition list from another movie", None),
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73: ("def_font_align[]", "Define font alignment zones", None),
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74: ("csm_txt_set[]", "CSM text settings", None),
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75: ("def_font3[]", "Define font text 3", None),
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77: ("metadata[]", "XML code describing the movie", None),
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78: ("def_scale_grid[]", "Define scaling factors", None),
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83: ("def_shape4[]", "Define shape 4", None),
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84: ("def_morph2[]", "Define a morphing shape 2", None),
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# SWF version 9.0
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72: ("do_abc[]", "SWF 9 ActionScript container; actions only", parseABC),
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76: ("symbol_class[]", "Instantiate objects from a set of classes", parseSymbolClass),
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82: ("do_abc_define[]", "SWF 9 ActionScript container; identifier, name, actions", parseABC),
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86: ("def_scene_frame[]", "Define raw data for scenes and frames", None),
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87: ("def_binary_data[]", "Defines a buffer of any size with any binary user data", parseBinaryData),
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88: ("def_font_name[]", "Define the legal font name and copyright", None),
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}
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def __init__(self, *args):
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FieldSet.__init__(self, *args)
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size = self["length"].value
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if self[0].name == "length_ext":
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self._size = (6 + size) * 8
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else:
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self._size = (2 + size) * 8
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code = self["code"].value
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if code in self.TAG_INFO:
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self._name, self._description, self.parser = self.TAG_INFO[code]
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else:
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self.parser = None
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def createFields(self):
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if self.stream.readBits(self.absolute_address, 6, self.endian) == 63:
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yield Bits(self, "length_ext", 6)
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yield Bits(self, "code", 10)
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yield filesizeHandler(UInt32(self, "length"))
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else:
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yield filesizeHandler(Bits(self, "length", 6))
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yield Bits(self, "code", 10)
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size = self["length"].value
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if 0 < size:
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if self.parser:
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yield from self.parser(self, size)
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else:
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yield RawBytes(self, "data", size)
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def createDescription(self):
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return "Tag: %s (%s)" % (self["code"].display, self["length"].display)
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class SwfFile(Parser):
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VALID_VERSIONS = set(range(1, 10 + 1))
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PARSER_TAGS = {
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"id": "swf",
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"category": "container",
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"file_ext": ["swf"],
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"mime": ("application/x-shockwave-flash",),
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"min_size": 64,
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"description": "Macromedia Flash data"
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}
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PARSER_TAGS["magic"] = []
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for version in VALID_VERSIONS:
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PARSER_TAGS["magic"].append((b"FWS" + bytes([version]), 0))
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PARSER_TAGS["magic"].append((b"CWS" + bytes([version]), 0))
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endian = LITTLE_ENDIAN
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SWF_SCALE_FACTOR = 1.0 / 20
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def validate(self):
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if self.stream.readBytes(0, 3) not in (b"FWS", b"CWS"):
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return "Wrong file signature"
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if self["version"].value not in self.VALID_VERSIONS:
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return "Unknown version"
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if MAX_FILE_SIZE < self["filesize"].value:
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return "File too big (%u)" % self["filesize"].value
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if self["signature"].value == "FWS":
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if self["rect/padding"].value != 0:
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return "Unknown rectangle padding value"
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return True
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def createFields(self):
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yield String(self, "signature", 3, "SWF format signature", charset="ASCII")
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yield UInt8(self, "version")
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yield filesizeHandler(UInt32(self, "filesize"))
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if self["signature"].value != "CWS":
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yield RECT(self, "rect")
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yield FixedFloat16(self, "frame_rate")
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yield UInt16(self, "frame_count")
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while not self.eof:
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yield Tag(self, "tag[]")
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else:
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size = (self.size - self.current_size) // 8
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if has_deflate:
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data = Deflate(Bytes(self, "compressed_data", size), False)
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def createInputStream(cis, source=None, **args):
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stream = cis(source=source)
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header = StringInputStream(
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b"FWS" + self.stream.readBytes(3 * 8, 5))
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args.setdefault("tags", []).append(("class", SwfFile))
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return ConcatStream((header, stream), source=stream.source, **args)
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data.setSubIStream(createInputStream)
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yield data
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else:
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yield Bytes(self, "compressed_data", size)
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def createDescription(self):
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desc = ["version %u" % self["version"].value]
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if self["signature"].value == "CWS":
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desc.append("compressed")
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return "Macromedia Flash data: %s" % (", ".join(desc))
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def createContentSize(self):
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if self["signature"].value == "FWS":
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return self["filesize"].value * 8
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else:
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# TODO: Size of compressed Flash?
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return None
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