av/revid/audio-input_test.go

package revid

import (
	"testing"

	"github.com/yobert/alsa"
)

func TestAudioDevice(t *testing.T) {
	// We want to open a device with a standard configuration.
	ac := &AudioConfig{
		SampleRate: 8000,
		Channels:   1,
		RecPeriod:  1,
		BitDepth:   16,
		Codec:      ADPCM,
	}

	// Check that a device exists with the desired parameters.
	cards, err := alsa.OpenCards()
	if err != nil {
		t.Skip("skipping, no audio card found")
	}
	defer alsa.CloseCards(cards)
	var testDev *alsa.Device
	for _, card := range cards {
		devices, err := card.Devices()
		if err != nil {
			continue
		}
		for _, dev := range devices {
			if dev.Type != alsa.PCM || !dev.Record {
				continue
			}
			testDev = dev
			break
		}
	}
	if testDev == nil {
		t.Skip("skipping, no suitable audio device found")
	}
	_, err = testDev.NegotiateChannels(2)
	if err != nil {
		t.Skip("skipping, no suitable audio device found")
	}
	foundRate := false
	for i := 0; i < len(rates) && !foundRate; i++ {
		if rates[i] < ac.SampleRate {
			continue
		}
		if rates[i]%ac.SampleRate == 0 {
			_, err = testDev.NegotiateRate(rates[i])
			if err == nil {
				foundRate = true
			}
		}
	}
	if !foundRate {
		_, err = testDev.NegotiateRate(defaultSampleRate)
		if err != nil {
			t.Skip("skipping, no suitable audio device found")
		}
	}
	_, err = testDev.NegotiateFormat(alsa.S16_LE)
	if err != nil {
		t.Skip("skipping, no suitable audio device found")
	}
	_, err = testDev.NegotiateBufferSize(8192, 16384)
	if err != nil {
		t.Skip("skipping, no suitable audio device found")
	}
	if err = testDev.Prepare(); err != nil {
		t.Skip("skipping, no suitable audio device found")
	}
	testDev.Close()

	ai := NewAudioDevice(ac)

	ai.Start()

	ai.Stop()
}