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|
package papipes
import (
"errors"
"fmt"
"os"
"os/exec"
"path/filepath"
"strconv"
"strings"
)
type Source struct {
Filename string
Name string
Format string
Rate int
Channels int
// channelMap
properties map[string]interface{}
file *os.File
moduleIndex int
open bool
}
func (s *Source) 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-source")
args = append(args, fmt.Sprintf("file=%s", s.Filename))
if s.Name != "" {
args = append(args, fmt.Sprintf("source_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))
}
var props string
for k, v := range s.properties {
props = props + fmt.Sprintf("%s='%v'", k, v)
}
args = append(args, fmt.Sprintf("source_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_RDWR, 0755); err != nil {
return err
}
s.open = true
return nil
}
func (s *Source) 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 *Source) Write(p []byte) (n int, err error) {
return s.file.Write(p)
}
func (s *Source) IsOpen() bool {
return s.open
}
func (s *Source) SetProperty(key string, value interface{}) *Source {
if s.properties == nil {
s.properties = make(map[string]interface{})
}
s.properties[key] = value
return s
}
func (s *Source) GetProperty(key string) interface{} {
if s.properties == nil {
return nil
}
return s.properties[key]
}
func GetActiveSources() ([]*Source, error) {
sources := make([]*Source, 0)
ls, err := getModulesList()
if err != nil {
return nil, err
}
for _, l := range ls {
ss := strings.Split(l, "\t")
if len(ss) < 2 {
continue
}
source := &Source{}
source.moduleIndex, _ = strconv.Atoi(ss[0])
if ss[1] != "module-pipe-source" {
continue
}
if len(ss) > 2 {
for k, v := range parseArguments(ss[2], '"') {
switch k {
case "file":
source.Filename = v
case "source_name":
source.Name = v
case "format":
source.Format = v
case "rate":
source.Rate, _ = strconv.Atoi(v)
case "channels":
source.Channels, _ = strconv.Atoi(v)
case "source_properties":
for k, v := range parseArguments(v, '\'') {
source.SetProperty(k, v)
}
}
}
}
sources = append(sources, source)
}
return sources, nil
}
|
