// Copyright 2019, Chef.  All rights reserved.
// https://github.com/q191201771/lal
//
// Use of this source code is governed by a MIT-style license
// that can be found in the License file.
//
// Author: Chef (191201771@qq.com)

package avc_test

import (
	"bytes"
	"fmt"
	"testing"

	"github.com/q191201771/naza/pkg/nazabits"
	"github.com/q191201771/naza/pkg/nazaerrors"

	"github.com/q191201771/naza/pkg/nazalog"

	"github.com/q191201771/lal/pkg/avc"

	"github.com/q191201771/naza/pkg/assert"
)

func TestParseNaluType(t *testing.T) {
	golden := map[uint8]uint8{
		0x06: avc.NaluTypeSei,
		0x41: avc.NaluTypeSlice,
		0x65: avc.NaluTypeIdrSlice,
	}
	for in, out := range golden {
		actual := avc.ParseNaluType(in)
		assert.Equal(t, out, actual)

		b := avc.ParseNaluTypeReadable(in)
		nazalog.Debug(b)
	}
}

func TestParseSliceType(t *testing.T) {
	golden := []struct {
		in  []byte
		out uint8
	}{
		{[]byte{0x65, 0x88, 0x82}, avc.SliceTypeI},
		{[]byte{0x65, 0x88, 0x84}, avc.SliceTypeI},
		{[]byte{0x41, 0x9a, 0x26}, avc.SliceTypeP},
		{[]byte{0x41, 0x9a, 0x46}, avc.SliceTypeP},
		{[]byte{0x41, 0x9a, 0x24}, avc.SliceTypeP},
		{[]byte{0x41, 0x9e, 0x42}, avc.SliceTypeB},
	}

	for _, item := range golden {
		v, err := avc.ParseSliceType(item.in)
		assert.Equal(t, nil, err)
		assert.Equal(t, item.out, v)

		b, err := avc.ParseSliceTypeReadable(item.in)
		assert.Equal(t, nil, err)
		nazalog.Debug(b)
	}
}

var goldenSeqHeader = []byte{
	0x17, 0x00, 0x00, 0x00, 0x00,
	0x01, 0x64, 0x00, 0x20, 0xFF,
	0xE1, 0x00, 0x19,
	0x67, 0x64, 0x00, 0x20, 0xAC, 0xD9, 0x40, 0xC0, 0x29, 0xB0, 0x11, 0x00, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x03, 0x00, 0x32, 0x0F, 0x18, 0x31, 0x96,
	0x01, 0x00, 0x05,
	0x68, 0xEB, 0xEC, 0xB2, 0x2C,
}

var goldenSps = []byte{
	0x67, 0x64, 0x00, 0x20, 0xAC, 0xD9, 0x40, 0xC0, 0x29, 0xB0, 0x11, 0x00, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x03, 0x00, 0x32, 0x0F, 0x18, 0x31, 0x96,
}

var goldenPps = []byte{
	0x68, 0xEB, 0xEC, 0xB2, 0x2C,
}

var goldenSeqHeader2 = []byte{
	0x17, 0x00, 0x00, 0x00, 0x00,
	0x01, 0x64, 0x00, 0x1F, 0xFF,
	0xE1, 0x00, 0x0A,
	0x27, 0x64, 0x00, 0x1F, 0xAC, 0x56, 0x80, 0xB4, 0x0A, 0x19,
	0x01, 0x00, 0x04,
	0x28, 0xEE, 0x3C, 0xB0,
}

var goldenSps2 = goldenSeqHeader2[13:]

func TestSpsPpsSeqHeader2Annexb(t *testing.T) {
	out, err := avc.SpsPpsSeqHeader2Annexb(goldenSeqHeader)
	assert.Equal(t, nil, err)
	var expected []byte
	expected = append(expected, avc.NaluStartCode4...)
	expected = append(expected, goldenSps...)
	expected = append(expected, avc.NaluStartCode4...)
	expected = append(expected, goldenPps...)
	assert.Equal(t, expected, out)
}

func TestParseSpsPpsFromSeqHeader(t *testing.T) {
	sps, pps, err := avc.ParseSpsPpsFromSeqHeader(goldenSeqHeader)
	assert.Equal(t, nil, err)
	assert.Equal(t, goldenSps, sps)
	assert.Equal(t, goldenPps, pps)
}

func TestBuildSeqHeaderFromSpsPps(t *testing.T) {
	sh, err := avc.BuildSeqHeaderFromSpsPps(goldenSps, goldenPps)
	assert.Equal(t, nil, err)
	assert.Equal(t, goldenSeqHeader, sh)
}

func TestCaptureAvc(t *testing.T) {
	b := &bytes.Buffer{}
	err := avc.CaptureAvcc2Annexb(b, []byte{0x17, 0x0, 0x0, 0x0, 0x0, 0x1, 0x64, 0x0, 0x1f, 0xff, 0xe1, 0x0, 0xa, 0x27, 0x64, 0x0, 0x1f, 0xac, 0x56, 0x80, 0xb4, 0xa, 0x19, 0x1, 0x0, 0x4, 0x28, 0xee, 0x3c, 0xb0})
	assert.Equal(t, nil, err)
	err = avc.CaptureAvcc2Annexb(b, []byte{0x27, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x8, 0x57, 0x21, 0xe1, 0x4, 0x43, 0x5f, 0xf4, 0x34, 0xb, 0x0, 0x4, 0x7d, 0xe1, 0x97, 0x46, 0xdf, 0xb1, 0xd1, 0xb5, 0xad, 0xd2, 0xf8, 0xf4, 0x5f, 0x39, 0x7d, 0x26, 0x8e, 0xec, 0xa3, 0xaf, 0xc0, 0xe7, 0xad, 0x35, 0x86, 0xfc, 0x53, 0xdb, 0xd6, 0x27, 0x72, 0x4e, 0x34, 0xd4, 0xbb, 0x83, 0x68, 0x29, 0xbd, 0xa8, 0xa0, 0xb9, 0x5b, 0x3c, 0xe3, 0xae, 0x2b, 0xd6, 0x2e, 0xb0, 0x6, 0x10, 0xa4, 0x3b, 0xb2, 0x7b, 0x15, 0x99, 0x8f, 0x83, 0x7d, 0xa7, 0x28, 0x82, 0x5f, 0x37, 0x16, 0x38, 0x7a, 0x9f, 0x49, 0xf9, 0x7c, 0xd2, 0xad, 0xd4, 0xf, 0x5b, 0xac, 0x90, 0x33, 0x83, 0x46, 0x29, 0xf, 0xae, 0x36, 0x3e, 0x32, 0x95, 0x85, 0x25, 0x66, 0xa3, 0x29, 0xc6, 0xa5, 0x1f, 0xb, 0xcc, 0xa1, 0x54, 0x63, 0x8a, 0xe, 0xa2, 0xd, 0x9e, 0x5d, 0x70, 0xd3, 0x2e, 0xeb, 0xbe, 0x71, 0x39, 0xf7, 0x7, 0xc0, 0x7e, 0xba, 0xf2, 0xdb, 0x69, 0xd, 0xba, 0xfd, 0x27, 0xba, 0x64, 0x6e, 0x89, 0xe4, 0x17, 0x9b, 0x5c, 0xc3, 0xb9, 0x23, 0x16, 0xe0, 0xf6, 0xae, 0x8, 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0x2c, 0x7a, 0xa2, 0x40, 0xf, 0x8f, 0xf7, 0x72, 0xb5, 0xe2, 0xc2, 0x95, 0x2e, 0x15, 0xb8, 0x75, 0xa, 0x16, 0x63, 0x21, 0xe7, 0x2c, 0x20, 0xd1, 0xde, 0x4f, 0x49, 0xaa, 0xf3, 0x1f, 0x1f, 0x50, 0xf9, 0xa4, 0x19, 0xd7, 0xdf, 0x86, 0x1a, 0x65, 0x35, 0x42, 0x1e, 0x69, 0xcb, 0x9, 0x92, 0x6f, 0xa5, 0x10, 0xe3, 0x8a, 0xd, 0xad, 0xfa, 0x19, 0x98, 0xb1, 0xfb, 0x7, 0xa8, 0x7f, 0x86, 0x83, 0x40, 0xb1, 0x51, 0x3d, 0x86, 0x8c, 0x2e, 0x9d, 0xac, 0x72, 0x3b, 0x93, 0xf0, 0xf8, 0x28, 0x55, 0x33, 0x8e, 0xfc, 0x74, 0x29, 0xfc, 0xa7, 0xd2, 0x66, 0x28, 0xc2, 0xcf, 0xf3, 0x42, 0xb5, 0xe3, 0x7e, 0x32, 0x5, 0x66, 0xfa, 0xea, 0xe0, 0xf7, 0x7d, 0xa8, 0xf5, 0xcc, 0x3a, 0xb9, 0x9c, 0xb1, 0x33, 0x6c, 0x75, 0xee, 0xb2, 0xb4, 0x1, 0x8d, 0x3a, 0xaf, 0xa3, 0xd0, 0xa3, 0x75, 0x5e, 0x2c, 0x40, 0x5e, 0x42, 0xae, 0x9c, 0xab, 0x8f, 0x8d, 0x2a, 0xb3, 0xf5, 0xfe, 0x0, 0x92, 0xd6, 0x24, 0x63, 0x3d, 0x3c, 0xd9, 0xc, 0xe6, 0x7d, 0x98, 0xc4, 0xd4, 0xdf, 0xb9, 0x2c, 0xe1, 0x3a, 0xb9, 0x96, 0x92, 0x7c, 0xd1, 0xa8, 0x7a, 0xb2, 0x3b, 0x24, 0xc7, 0x6, 0xb4, 0x51, 0x2b, 0xd3, 0x55, 0xf3, 0x6a, 0xda, 0x82, 0x55, 0x38, 0xb3, 0x1f, 0x96, 0x66, 0x35, 0xb0, 0xf8, 0x3a, 0xba, 0x44, 0xcf, 0x42, 0x7c, 0xf7, 0xb8, 0x91, 0xda, 0x11, 0x84, 0x2e, 0x75, 0xd, 0xc9, 0xaf, 0xce, 0x2d, 0xbf, 0x86, 0xb4, 0x6f, 0x9a, 0x19, 0x60, 0x33, 0x16, 0x9b, 0x34, 0x2d, 0x4, 0x4c, 0x53, 0x12, 0x79, 0x85, 0x7f, 0x2, 0x7d, 0xf, 0xbf, 0x1, 0xc1, 0x94, 0x17, 0xd8, 0xf2, 0x93, 0x0, 0xf3, 0x33, 0x18, 0x9d, 0xea, 0x20, 0x49, 0x88, 0x0, 0xc7, 0x3c, 0xc8, 0x99, 0x8e, 0x16, 0xd5, 0x20, 0xa4, 0x89, 0xb5, 0x5c, 0x70, 0xfc, 0xbf, 0x1e, 0x11, 0x32, 0x27, 0x5e, 0xb1, 0x6a, 0xf8, 0x99, 0x90, 0xe4, 0x12, 0x18, 0xde, 0x55, 0x34, 0xaf, 0x42, 0x8c, 0x2b, 0x2e, 0xad, 0xed, 0xc2, 0xc3, 0xb1, 0x3, 0xca, 0xd0, 0xbc, 0x13, 0x6d, 0xda, 0xcc, 0xca, 0x4e, 0x3a, 0x58, 0x6d, 0x0, 0xd3, 0xca, 0xf1, 0x2e, 0x63, 0x96, 0xfe, 0x54, 0xfb, 0x71, 0x77, 0xfe, 0x3f, 0x5a, 0x53, 0xa, 0xc0, 0x88, 0x3e, 0x97, 0xf2, 0x3f, 0xb8, 0x6, 0x9c, 0xfb, 0x71, 0x41, 0x6c, 0x82, 0x46, 0x74, 0x9a, 0x16, 0x92, 0xaa, 0x68, 0x61, 0x3f, 0xae, 0x1a, 0x15, 0xea, 0xee, 0x16, 0xa3, 0x46, 0xa6, 0xc9, 0x53, 0x22, 0x36, 0xce, 0x5b, 0xec, 0x7d, 0x38, 0xf, 0xe, 0xf0, 0x8a, 0xcc, 0xd7, 0xd3, 0x94, 0xf1, 0x29, 0x86, 0x64, 0x49, 0xc0, 0x2a, 0x39, 0x65, 0x24, 0x46, 0x4b, 0xe6, 0x21, 0xba, 0xe4, 0x51, 0x39, 0x88, 0xac, 0x25, 0x4a, 0xa3, 0xc0, 0x8d, 0xc7, 0xa9, 0x29, 0xe3, 0xe0, 0x6e, 0xe0, 0xe0, 0x9b, 0x54, 0xf1, 0xed, 0xa4, 0xcc, 0x8b, 0x8d, 0xc9, 0xd7, 0xe6, 0x27, 0xa9, 0x2d, 0x7d, 0x36, 0x8f, 0x41, 0xdc, 0x63, 0x31, 0x51, 0x7d, 0x83, 0x29, 0x2, 0x1e, 0x23, 0xbc, 0x96, 0x33, 0x6b, 0x39, 0xca, 0xb1, 0xfd, 0xc3, 0xb1, 0xec, 0xe5, 0xbd, 0x60, 0xa5, 0xc6, 0x3b, 0x1b, 0xdf, 0x34, 0x71, 0x87, 0x14, 0xd, 0xfe, 0x4d, 0xce, 0x3c, 0xeb, 0x65, 0x24, 0x5b, 0xee, 0x51, 0xb7, 0x4e})
	assert.Equal(t, nil, err)
	expected := []byte{0x0, 0x0, 0x0, 0x1, 0x27, 0x64, 0x0, 0x1f, 0xac, 0x56, 0x80, 0xb4, 0xa, 0x19, 0x0, 0x0, 0x0, 0x1, 0x28, 0xee, 0x3c, 0xb0, 0x0, 0x0, 0x0, 0x1, 0x21, 0xe1, 0x4, 0x43, 0x5f, 0xf4, 0x34, 0xb, 0x0, 0x4, 0x7d, 0xe1, 0x97, 0x46, 0xdf, 0xb1, 0xd1, 0xb5, 0xad, 0xd2, 0xf8, 0xf4, 0x5f, 0x39, 0x7d, 0x26, 0x8e, 0xec, 0xa3, 0xaf, 0xc0, 0xe7, 0xad, 0x35, 0x86, 0xfc, 0x53, 0xdb, 0xd6, 0x27, 0x72, 0x4e, 0x34, 0xd4, 0xbb, 0x83, 0x68, 0x29, 0xbd, 0xa8, 0xa0, 0xb9, 0x5b, 0x3c, 0xe3, 0xae, 0x2b, 0xd6, 0x2e, 0xb0, 0x6, 0x10, 0xa4, 0x3b, 0xb2, 0x7b, 0x15, 0x99, 0x8f, 0x83, 0x7d, 0xa7, 0x28, 0x82, 0x5f, 0x37, 0x16, 0x38, 0x7a, 0x9f, 0x49, 0xf9, 0x7c, 0xd2, 0xad, 0xd4, 0xf, 0x5b, 0xac, 0x90, 0x33, 0x83, 0x46, 0x29, 0xf, 0xae, 0x36, 0x3e, 0x32, 0x95, 0x85, 0x25, 0x66, 0xa3, 0x29, 0xc6, 0xa5, 0x1f, 0xb, 0xcc, 0xa1, 0x54, 0x63, 0x8a, 0xe, 0xa2, 0xd, 0x9e, 0x5d, 0x70, 0xd3, 0x2e, 0xeb, 0xbe, 0x71, 0x39, 0xf7, 0x7, 0xc0, 0x7e, 0xba, 0xf2, 0xdb, 0x69, 0xd, 0xba, 0xfd, 0x27, 0xba, 0x64, 0x6e, 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	assert.Equal(t, expected, b.Bytes())
}

func TestParseSps(t *testing.T) {
	var ctx avc.Context
	err := avc.ParseSps(goldenSps, &ctx)
	assert.Equal(t, nil, err)
	assert.Equal(t, uint8(100), ctx.Profile)
	assert.Equal(t, uint8(32), ctx.Level)
	assert.Equal(t, uint32(768), ctx.Width)
	assert.Equal(t, uint32(320), ctx.Height)

	err = avc.ParseSps(nil, &ctx)
	assert.Equal(t, true, nazaerrors.Is(err, nazabits.ErrNazaBits))
	assert.IsNotNil(t, err)
	nazalog.Debugf("error expected not nil, actual=%+v", err)

	err = avc.ParseSps(goldenSps2, &ctx)
	assert.Equal(t, nil, err)
	assert.Equal(t, uint8(100), ctx.Profile)
	assert.Equal(t, uint8(31), ctx.Level)
	assert.Equal(t, uint32(720), ctx.Width)
	assert.Equal(t, uint32(1280), ctx.Height)
}

func TestTry(t *testing.T) {
	err := avc.TryParseSeqHeader(goldenSeqHeader)
	assert.Equal(t, nil, err)
}

func TestCorner(t *testing.T) {
	sps, pps, err := avc.ParseSpsPpsFromSeqHeader([]byte{0})
	assert.Equal(t, nil, sps)
	assert.Equal(t, nil, pps)
	assert.Equal(t, avc.ErrAvc, err)

	b := &bytes.Buffer{}
	err = avc.CaptureAvcc2Annexb(b, []byte{0x17, 0x0, 0x1})
	assert.Equal(t, nil, b.Bytes())
	assert.Equal(t, avc.ErrAvc, err)
}

func TestParsePps_Case2(t *testing.T) {
	in := []byte{0x67, 0x64, 0x00, 0x20, 0xad, 0x84, 0x01, 0x0c, 0x20, 0x08, 0x61, 0x00, 0x43, 0x08, 0x02, 0x18, 0x40, 0x10, 0xc2, 0x00, 0x84, 0x3b, 0x50, 0x28, 0x03, 0xcd, 0x37, 0x01, 0x01, 0x01, 0x40, 0x00, 0x00, 0x03, 0x00, 0x40, 0x00, 0x00, 0x0c, 0xa1}
	var ctx avc.Context
	err := avc.ParseSps(in, &ctx)
	assert.Equal(t, nil, err)
	assert.Equal(t, uint8(100), ctx.Profile)
	assert.Equal(t, uint8(32), ctx.Level)
	assert.Equal(t, uint32(1280), ctx.Width)
	assert.Equal(t, uint32(960), ctx.Height)
}

func TestIterateStartCode(t *testing.T) {
	golden := []struct {
		nalu   []byte
		pos    int
		length int
	}{
		{
			nalu:   []byte{0, 0, 1},
			pos:    0,
			length: 3,
		},
		{
			nalu:   []byte{0, 0, 0, 1},
			pos:    0,
			length: 4,
		},
		{
			nalu:   []byte{0xa, 0, 0, 0, 1},
			pos:    1,
			length: 4,
		},
		{
			nalu:   []byte{0, 1},
			pos:    -1,
			length: -1,
		},
		{
			nalu:   []byte{0xa, 0xb},
			pos:    -1,
			length: -1,
		},
	}

	for _, v := range golden {
		pos, length := avc.IterateNaluStartCode(v.nalu, 0)
		assert.Equal(t, v.pos, pos)
		assert.Equal(t, v.length, length)
	}
}

func TestIterateNaluAnnexb(t *testing.T) {
	golden := []struct {
		nals    []byte
		nalList [][]byte
		err     error
	}{
		{
			nals: []byte{0, 0, 1, 0xa, 0xb},
			nalList: [][]byte{
				{0xa, 0xb},
			},
			err: nil,
		},
		{
			nals: []byte{0, 0, 0, 1, 0xa, 0xb, 0, 0, 0, 1, 0xc, 0xd},
			nalList: [][]byte{
				{0xa, 0xb},
				{0xc, 0xd},
			},
			err: nil,
		},
		{
			nals: []byte{0xa, 0xb},
			nalList: [][]byte{
				{0xa, 0xb},
			},
			err: avc.ErrAvc,
		},
		{
			nals:    []byte{0, 0, 1},
			nalList: nil,
			err:     avc.ErrAvc,
		},
		{
			nals:    []byte{0, 0, 1, 0, 0, 1},
			nalList: nil,
			err:     avc.ErrAvc,
		},
		{
			nals:    nil,
			nalList: nil,
			err:     avc.ErrAvc,
		},
	}
	for _, v := range golden {
		nalList, err := avc.SplitNaluAnnexb(v.nals)
		assert.Equal(t, v.nalList, nalList)
		assert.Equal(t, v.err, err, fmt.Sprintf("%+v", v))
	}
}

func TestIterateNaluAvcc(t *testing.T) {
	golden := []struct {
		nals    []byte
		nalList [][]byte
		err     error
	}{
		{
			nals: []byte{0, 0, 0, 1, 0xa}, // 正常，1个
			nalList: [][]byte{
				{0xa},
			},
			err: nil,
		},
		{
			nals: []byte{0, 0, 0, 1, 0xa, 0, 0, 0, 2, 0xa, 0xb}, // 正常，2个
			nalList: [][]byte{
				{0xa},
				{0xa, 0xb},
			},
			err: nil,
		},
		{
			nals:    []byte{0, 0}, // length不全
			nalList: nil,
			err:     avc.ErrAvc,
		},
		{
			nals:    nil,
			nalList: nil,
			err:     avc.ErrAvc,
		},
		{
			nals:    []byte{0, 0, 0, 1}, // 只有length
			nalList: nil,
			err:     avc.ErrAvc,
		},
		{
			nals: []byte{0, 0, 0, 2, 0xa}, // 包体数据不全
			nalList: [][]byte{
				{0xa},
			},
			err: avc.ErrAvc,
		},
	}
	for _, v := range golden {
		nalList, err := avc.SplitNaluAvcc(v.nals)
		assert.Equal(t, v.nalList, nalList)
		assert.Equal(t, v.err, err)
	}
}