mirror of
https://thingvellir.net/git/overte
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46 lines
1.5 KiB
Lua
46 lines
1.5 KiB
Lua
print("Loading hf-audio")
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bit32 = require("bit32")
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-- create the audio protocol
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p_hf_audio = Proto("hf-audio", "HF Audio Protocol")
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-- audio packet fields
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local f_audio_sequence_number = ProtoField.uint16("hf_audio.sequence_number", "Sequence Number")
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local f_audio_codec_size = ProtoField.uint32("hf_audio.codec_size", "Codec Size")
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local f_audio_codec = ProtoField.string("hf_audio.codec", "Codec")
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local f_audio_is_stereo = ProtoField.bool("hf_audio.is_stereo", "Is Stereo")
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local f_audio_num_silent_samples = ProtoField.uint16("hf_audio.num_silent_samples", "Num Silent Samples")
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p_hf_audio.fields = {
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f_audio_sequence_number, f_audio_codec_size, f_audio_codec,
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f_audio_is_stereo, f_audio_num_silent_samples
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}
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local packet_type_extractor = Field.new('hfudt.type_text')
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function p_hf_audio.dissector(buf, pinfo, tree)
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pinfo.cols.protocol = p_hf_audio.name
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audio_subtree = tree:add(p_hf_audio, buf())
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local i = 0
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audio_subtree:add_le(f_audio_sequence_number, buf(i, 2))
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i = i + 2
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-- figure out the number of bytes the codec name takes
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local codec_name_bytes = buf(i, 4):le_uint()
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audio_subtree:add_le(f_audio_codec_size, buf(i, 4))
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i = i + 4
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audio_subtree:add(f_audio_codec, buf(i, codec_name_bytes))
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i = i + codec_name_bytes
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local packet_type = packet_type_extractor().value
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if packet_type == "SilentAudioFrame" then
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audio_subtree:add_le(f_audio_num_silent_samples, buf(i, 2))
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i = i + 2
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else
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audio_subtree:add_le(f_audio_is_stereo, buf(i, 1))
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i = i + 1
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end
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end
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