mirror of https://bitbucket.org/ausocean/av.git
104 lines
2.9 KiB
Go
104 lines
2.9 KiB
Go
/*
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NAME
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adpcm_test.go
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DESCRIPTION
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See Readme.md
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AUTHOR
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Trek Hopton <trek@ausocean.org>
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LICENSE
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adpcm_test.go is Copyright (C) 2018 the Australian Ocean Lab (AusOcean)
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It is free software: you can redistribute it and/or modify them
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under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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It is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with revid in gpl.txt. If not, see [GNU licenses](http://www.gnu.org/licenses).
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*/
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package adpcm
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import (
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"bytes"
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"io/ioutil"
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"log"
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"testing"
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)
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// TestEncodeBlock will read PCM data, encode it in blocks and generate ADPCM
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// then compare the result with expected ADPCM.
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func TestEncodeBlock(t *testing.T) {
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//read input pcm
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pcm, err := ioutil.ReadFile("../../../test/test-data/av/input/raw-voice.pcm")
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if err != nil {
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t.Errorf("Unable to read input PCM file: %v", err)
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}
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//encode adpcm
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inBSize := 1010
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numBlocks := int(len(pcm) / inBSize)
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outBSize := int(float32(inBSize/4) + float32(3.5)) // compression is 4:1 and 3.5 bytes of info are added to each block
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comp := make([]byte, 0, outBSize*numBlocks)
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for i := 0; i < numBlocks; i++ {
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block := pcm[inBSize*i : inBSize*(i+1)]
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encBlock, err := EncodeBlock(block)
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if err != nil {
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log.Fatal(err)
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}
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comp = append(comp, encBlock...)
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}
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//read expected adpcm file
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exp, err := ioutil.ReadFile("../../../test/test-data/av/output/encoded-voice.adpcm")
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if err != nil {
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t.Errorf("Unable to read expected ADPCM file: %v", err)
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}
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if !bytes.Equal(comp, exp) {
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t.Error("ADPCM generated does not match expected ADPCM")
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}
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}
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// TestDecodeBlock will read encoded ADPCM, decode it in blocks and then compare the
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// resulting PCM with the expected decoded PCM.
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func TestDecodeBlock(t *testing.T) {
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//read adpcm
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comp, err := ioutil.ReadFile("../../../test/test-data/av/input/encoded-voice.adpcm")
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if err != nil {
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t.Errorf("Unable to read input ADPCM file: %v", err)
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}
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//decode adpcm
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inBSize := 256
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numBlocks := int(len(comp) / inBSize)
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outBSize := 2 + (inBSize-4)*4 // 2 bytes are copied, 2 are used as block header info, the remaining bytes are decompressed 1:4
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decoded := make([]byte, 0, outBSize*numBlocks)
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for i := 0; i < numBlocks; i++ {
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block := comp[inBSize*i : inBSize*(i+1)]
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decBlock, err := DecodeBlock(block)
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if err != nil {
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log.Fatal(err)
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}
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decoded = append(decoded, decBlock...)
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}
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//read expected pcm file
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exp, err := ioutil.ReadFile("../../../test/test-data/av/output/decoded-voice.pcm")
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if err != nil {
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t.Errorf("Unable to read expected PCM file: %v", err)
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}
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if !bytes.Equal(decoded, exp) {
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t.Error("PCM generated does not match expected PCM")
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}
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}
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