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mpeg-audio-frame-parser
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Cleanup Frame.parse_sample_rate/1

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Rob Watson 2018-04-19 10:46:09 +02:00
parent 491b7462ca
commit 797a87ded8
1 changed files with 12 additions and 10 deletions
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22
lib/mpeg_audio_frame_parser/frame.ex
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@ -184,16 +184,18 @@ defmodule MPEGAudioFrameParser.Frame do
end
defp parse_sample_rate(<<@sync_word::size(11), version_bits::size(2), _::size(7), sample_rate_bits::size(2), _::bits>>) do
case {version_bits, sample_rate_bits} do
{0b11, 0b00} -> 44100
{0b11, 0b01} -> 48000
{0b11, 0b10} -> 32000
{0b10, 0b00} -> 22050
{0b10, 0b01} -> 24000
{0b10, 0b10} -> 16000
{0b00, 0b00} -> 11025
{0b00, 0b01} -> 12000
{0b00, 0b10} -> 8000
version_atom = version_atom(version_bits)
case {version_atom, sample_rate_bits} do
{:version1, 0b00} -> 44100
{:version1, 0b01} -> 48000
{:version1, 0b10} -> 32000
{:version2, 0b00} -> 22050
{:version2, 0b01} -> 24000
{:version2, 0b10} -> 16000
{:"version2.5", 0b00} -> 11025
{:"version2.5", 0b01} -> 12000
{:"version2.5", 0b10} -> 8000
_ -> :bad
end
end