mirror of https://bitbucket.org/ausocean/av.git
263 lines
7.8 KiB
Go
263 lines
7.8 KiB
Go
/*
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NAME
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lex_test.go
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DESCRIPTION
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lex_test.go provides tests to check validity of the Lexer found in lex.go.
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AUTHORS
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Saxon A. Nelson-Milton <saxon@ausocean.org>
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LICENSE
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Copyright (C) 2019 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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in gpl.txt. If not, see http://www.gnu.org/licenses.
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*/
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package h265
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import (
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"io"
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"testing"
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)
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// rtpReader provides the RTP stream.
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type rtpReader struct {
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packets [][]byte
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idx int
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}
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// Read implements io.Reader.
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func (r *rtpReader) Read(p []byte) (int, error) {
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if r.idx == len(r.packets) {
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return 0, io.EOF
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}
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b := r.packets[r.idx]
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n := copy(p, b)
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if n < len(r.packets[r.idx]) {
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r.packets[r.idx] = r.packets[r.idx][n:]
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} else {
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r.idx++
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}
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return n, nil
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}
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// destination holds the access units extracted during the lexing process.
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type destination [][]byte
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// Write implements io.Writer.
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func (d *destination) Write(p []byte) (int, error) {
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t := make([]byte, len(p))
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copy(t, p)
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*d = append([][]byte(*d), t)
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return len(p), nil
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}
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// TestLex checks that the Lexer can correctly extract H265 access units from
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// HEVC RTP stream in RTP payload format.
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func TestLex(t *testing.T) {
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const rtpVer = 2
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tests := []struct {
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donl bool
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packets [][]byte
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expect [][]byte
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}{
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{
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donl: false,
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packets: [][]byte{
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{ // Single NAL unit.
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0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // RTP header.
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0x40, 0x00, // NAL header (type=32 VPS).
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0x01, 0x02, 0x03, 0x04, // NAL Data.
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},
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{ // Fragmentation (start packet).
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0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // RTP header.
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0x62, 0x00, // NAL header (type49).
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0x80, // FU header.
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0x01, 0x02, 0x03, // FU payload.
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},
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{ // Fragmentation (middle packet)
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0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // RTP header.
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0x62, 0x00, // NAL header (type 49).
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0x00, // FU header.
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0x04, 0x05, 0x06, // FU payload.
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},
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{ // Fragmentation (end packet)
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0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // RTP header.
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0x62, 0x00, // NAL header (type 49).
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0x40, // FU header.
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0x07, 0x08, 0x09, // FU payload
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},
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{ // Aggregation. Make last packet of access unit => marker bit true.
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0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // RTP header.
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0x60, 0x00, // NAL header (type 49).
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0x00, 0x04, // NAL 1 size.
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0x01, 0x02, 0x03, 0x04, // NAL 1 data.
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0x00, 0x04, // NAL 2 size.
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0x01, 0x02, 0x03, 0x04, // NAL 2 data.
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},
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{ // Singla NAL
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0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // RTP header.
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0x40, 0x00, // NAL header (type=32 VPS).
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0x01, 0x02, 0x03, 0x04, // NAL data.
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},
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{ // Singla NAL. Make last packet of access unit => marker bit true.
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0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // RTP header.
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0x40, 0x00, // NAL header (type=32 VPS).
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0x01, 0x02, 0x03, 0x04, // NAL data.
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},
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},
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expect: [][]byte{
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// First access unit.
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{
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// NAL 1
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0x00, 0x00, 0x00, 0x01, // Start code.
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0x40, 0x00, // NAL header (type=32 VPS).
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0x01, 0x02, 0x03, 0x04, // NAL data.
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// NAL 2
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0x00, 0x00, 0x00, 0x01, // Start code.
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0x01, 0x02, 0x03, // FU payload.
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0x04, 0x05, 0x06, // FU payload.
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0x07, 0x08, 0x09, // FU payload.
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// NAL 3
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0x00, 0x00, 0x00, 0x01, // Start code.
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0x01, 0x02, 0x03, 0x04, // NAL data.
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// NAL 4
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0x00, 0x00, 0x00, 0x01, // Start code.
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0x01, 0x02, 0x03, 0x04, // NAL 2 data
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},
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// Second access unit.
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{
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// NAL 1
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0x00, 0x00, 0x00, 0x01, // Start code.
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0x40, 0x00, // NAL header (type=32 VPS).
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0x01, 0x02, 0x03, 0x04, // Data.
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// NAL 2
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0x00, 0x00, 0x00, 0x01, // Start code.
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0x40, 0x00, // NAL header (type=32 VPS).
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0x01, 0x02, 0x03, 0x04, // Data.
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},
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},
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},
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{
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donl: true,
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packets: [][]byte{
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{ // Single NAL unit.
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0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // RTP header.
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0x40, 0x00, // NAL header (type=32 VPS).
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0x00, 0x00, // DONL
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0x01, 0x02, 0x03, 0x04, // NAL Data.
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},
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{ // Fragmentation (start packet).
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0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // RTP header.
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0x62, 0x00, // NAL header (type49).
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0x80, // FU header.
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0x00, 0x00, // DONL
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0x01, 0x02, 0x03, // FU payload.
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},
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{ // Fragmentation (middle packet)
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0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // RTP header.
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0x62, 0x00, // NAL header (type 49).
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0x00, // FU header.
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0x00, 0x00, // DONL
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0x04, 0x05, 0x06, // FU payload.
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},
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{ // Fragmentation (end packet)
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0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // RTP header.
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0x62, 0x00, // NAL header (type 49).
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0x40, // FU header.
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0x00, 0x00, // DONL
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0x07, 0x08, 0x09, // FU payload
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},
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{ // Aggregation. Make last packet of access unit => marker bit true.
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0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // RTP header.
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0x60, 0x00, // NAL header (type 49).
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0x00, 0x00, // DONL
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0x00, 0x04, // NAL 1 size.
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0x01, 0x02, 0x03, 0x04, // NAL 1 data.
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0x00, // DOND
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0x00, 0x04, // NAL 2 size.
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0x01, 0x02, 0x03, 0x04, // NAL 2 data.
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},
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{ // Singla NAL
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0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // RTP header.
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0x40, 0x00, // NAL header (type=32 VPS)
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0x00, 0x00, // DONL.
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0x01, 0x02, 0x03, 0x04, // NAL data.
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},
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{ // Singla NAL. Make last packet of access unit => marker bit true.
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0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // RTP header.
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0x40, 0x00, // NAL header (type=32 VPS).
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0x00, 0x00, // DONL
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0x01, 0x02, 0x03, 0x04, // NAL data.
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},
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},
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expect: [][]byte{
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// First access unit.
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{
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// NAL 1
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0x00, 0x00, 0x00, 0x01, // Start code.
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0x40, 0x00, // NAL header (type=32 VPS).
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0x00, 0x00, // DONL
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0x01, 0x02, 0x03, 0x04, // NAL data.
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// NAL 2
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0x00, 0x00, 0x00, 0x01, // Start code.
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0x01, 0x02, 0x03, // FU payload.
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0x04, 0x05, 0x06, // FU payload.
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0x07, 0x08, 0x09, // FU payload.
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// NAL 3
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0x00, 0x00, 0x00, 0x01, // Start code.
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0x01, 0x02, 0x03, 0x04, // NAL data.
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// NAL 4
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0x00, 0x00, 0x00, 0x01, // Start code.
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0x01, 0x02, 0x03, 0x04, // NAL 2 data
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},
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// Second access unit.
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{
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// NAL 1
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0x00, 0x00, 0x00, 0x01, // Start code.
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0x40, 0x00, // NAL header (type=32 VPS).
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0x00, 0x00, // DONL
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0x01, 0x02, 0x03, 0x04, // Data.
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// NAL 2
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0x00, 0x00, 0x00, 0x01, // Start code.
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0x40, 0x00, // NAL header (type=32 VPS).
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0x00, 0x00, // DONL
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0x01, 0x02, 0x03, 0x04, // Data.
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},
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},
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},
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}
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for testNum, test := range tests {
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r := &rtpReader{packets: test.packets}
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d := &destination{}
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err := NewLexer(test.donl).Lex(d, r, 0)
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if err != nil {
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t.Fatalf("error lexing: %v\n", err)
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}
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for i, accessUnit := range test.expect {
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for j, part := range accessUnit {
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if part != [][]byte(*d)[i][j] {
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t.Fatalf("did not get expected data for test: %v.\nGot: %v\nWant: %v\n", testNum, d, test.expect)
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}
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}
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}
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}
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}
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