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|
package papipes
import (
"errors"
"fmt"
"os"
"os/exec"
"path/filepath"
"strconv"
"strings"
)
type Sink struct {
Filename string
Name string
Format string
Rate int
Channels int
// ChannelMap
UseSystemClockForTiming bool
properties map[string]interface{}
file *os.File
open bool
moduleIndex int
}
func (s *Sink) Open() error {
var err error
if !filepath.IsAbs(s.Filename) {
return errors.New("Filename is not absolute path")
}
args := make([]string, 0)
args = append(args, "load-module")
args = append(args, "module-pipe-sink")
args = append(args, fmt.Sprintf("file=%s", s.Filename))
if s.Name != "" {
args = append(args, fmt.Sprintf("sink_name=%s", s.Name))
}
if s.Format != "" {
args = append(args, fmt.Sprintf("format=%s", s.Format))
}
if s.Rate > 0 {
args = append(args, fmt.Sprintf("rate=%d", s.Rate))
}
if s.Channels > 0 {
args = append(args, fmt.Sprintf("channels=%d", s.Channels))
}
if s.UseSystemClockForTiming {
args = append(args, "use_system_clock_for_timing=yes")
}
var props string
for k, v := range s.properties {
props = props + fmt.Sprintf("%s='%v'", k, v)
}
args = append(args, fmt.Sprintf("sink_properties=\"%s\"", props))
cmd := exec.Command("pactl", args...)
out, err := cmd.CombinedOutput()
if err != nil {
return errors.New(string(out))
}
if _, err := fmt.Sscanf(string(out), "%d", &s.moduleIndex); err != nil {
return err
}
if s.file, err = os.OpenFile(s.Filename, os.O_RDONLY, 0755); err != nil {
return err
}
s.open = true
return nil
}
func (s *Sink) Close() error {
if s.file != nil {
if err := s.file.Close(); err != nil {
return err
}
}
args := make([]string, 0)
args = append(args, "unload-module")
args = append(args, fmt.Sprintf("%d", s.moduleIndex))
cmd := exec.Command("pactl", args...)
out, err := cmd.CombinedOutput()
if err != nil {
return errors.New(string(out))
}
s.open = false
return nil
}
func (s *Sink) Read(p []byte) (n int, err error) {
return s.file.Read((p))
}
func (s *Sink) IsOpen() bool {
return s.open
}
func (s *Sink) SetProperty(key string, value interface{}) *Sink {
if s.properties == nil {
s.properties = make(map[string]interface{})
}
s.properties[key] = value
return s
}
func (s *Sink) GetProperty(key string) interface{} {
if s.properties == nil {
return nil
}
return s.properties[key]
}
func GetActiveSinks() ([]*Sink, error) {
sinks := make([]*Sink, 0)
ls, err := getModulesList()
if err != nil {
return nil, err
}
for _, l := range ls {
ss := strings.Split(l, "\t")
if len(ss) < 2 {
continue
}
sink := &Sink{}
sink.moduleIndex, _ = strconv.Atoi(ss[0])
if ss[1] != "module-pipe-sink" {
continue
}
if len(ss) > 2 {
for k, v := range parseArguments(ss[2], '"') {
switch k {
case "file":
sink.Filename = v
case "sink_name":
sink.Name = v
case "format":
sink.Format = v
case "rate":
sink.Rate, _ = strconv.Atoi(v)
case "channels":
sink.Channels, _ = strconv.Atoi(v)
case "use_system_clock_for_timing":
if v == "yes" {
sink.UseSystemClockForTiming = true
}
case "sink_properties":
for k, v := range parseArguments(v, '\'') {
sink.SetProperty(k, v)
}
}
}
}
sinks = append(sinks, sink)
}
return sinks, nil
}
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