102 lines
2.5 KiB
Go
102 lines
2.5 KiB
Go
// Copyright 2017 Hajime Hoshi
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package consts
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import (
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"fmt"
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)
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type UnexpectedEOF struct {
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At string
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}
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func (u *UnexpectedEOF) Error() string {
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return fmt.Sprintf("mp3: unexpected EOF at %s", u.At)
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}
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type Version int
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const (
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Version2_5 Version = 0
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VersionReserved Version = 1
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Version2 Version = 2
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Version1 Version = 3
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)
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type Layer int
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const (
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LayerReserved Layer = 0
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Layer3 Layer = 1
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Layer2 Layer = 2
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Layer1 Layer = 3
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)
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type Mode int
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const (
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ModeStereo Mode = 0
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ModeJointStereo Mode = 1
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ModeDualChannel Mode = 2
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ModeSingleChannel Mode = 3
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)
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const (
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SamplesPerGr = 576
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GranulesMpeg1 = 2
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)
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type SamplingFrequency int
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const (
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SamplingFrequencyReserved SamplingFrequency = 3
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)
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const (
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SfBandIndicesLong = 0
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SfBandIndicesShort = 1
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)
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var SfBandIndices = [2][3][2][]int{
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{ // MPEG 1
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{ // Layer 3
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{0, 4, 8, 12, 16, 20, 24, 30, 36, 44, 52, 62, 74, 90, 110, 134, 162, 196, 238, 288, 342, 418, 576},
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{0, 4, 8, 12, 16, 22, 30, 40, 52, 66, 84, 106, 136, 192},
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},
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{ // Layer 2
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{0, 4, 8, 12, 16, 20, 24, 30, 36, 42, 50, 60, 72, 88, 106, 128, 156, 190, 230, 276, 330, 384, 576},
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{0, 4, 8, 12, 16, 22, 28, 38, 50, 64, 80, 100, 126, 192},
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},
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{ // Layer 1
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{0, 4, 8, 12, 16, 20, 24, 30, 36, 44, 54, 66, 82, 102, 126, 156, 194, 240, 296, 364, 448, 550, 576},
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{0, 4, 8, 12, 16, 22, 30, 42, 58, 78, 104, 138, 180, 192},
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},
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},
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{ // MPEG 2
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{ // Layer 3
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{0, 6, 12, 18, 24, 30, 36, 44, 54, 66, 80, 96, 116, 140, 168, 200, 238, 284, 336, 396, 464, 522, 576},
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{0, 4, 8, 12, 18, 24, 32, 42, 56, 74, 100, 132, 174, 192},
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},
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{ // Layer 2
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{0, 6, 12, 18, 24, 30, 36, 44, 54, 66, 80, 96, 114, 136, 162, 194, 232, 278, 332, 394, 464, 540, 576},
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{0, 4, 8, 12, 18, 26, 36, 48, 62, 80, 104, 136, 180, 192},
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},
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{ // Layer 1
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{0, 6, 12, 18, 24, 30, 36, 44, 54, 66, 80, 96, 116, 140, 168, 200, 238, 284, 336, 396, 464, 522, 576},
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{0, 4, 8, 12, 18, 26, 36, 48, 62, 80, 104, 134, 174, 192},
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},
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},
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}
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