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ffmpeg: use one command to stream video/audio

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This commit is contained in:
Artem
2024-11-05 18:49:21 +01:00
parent f10e2da534
commit 1f5a56cc5d
8 changed files with 100 additions and 258 deletions
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213
http/hw/stream/pipedprocess.go
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@@ -1,25 +1,39 @@
package stream
import (
"log"
"os"
"os/exec"
"strings"
"sync"
"syscall"
log "github.com/sirupsen/logrus"
)
var pipedCmd *PipedCmd
var mu sync.Mutex
// PipedCmd struct manages a sequence of piped commands.
type PipedCmd struct {
cmds []*exec.Cmd
mu sync.Mutex
running bool
finished chan struct{}
cmds []*exec.Cmd
running bool
}
// InitPipedCmd initializes a PipedCmd instance with a sequence of commands.
func InitPipedCmd(cmds []string) *PipedCmd {
func InitPipedCmd(cmd string) *PipedCmd {
pipedCmd = &PipedCmd{}
pipedCmd.ChangeCmd(cmd)
return pipedCmd
}
func (p *PipedCmd) ChangeCmd(cmd string) {
cmds := strings.Split(cmd, "|")
for i, c := range cmds {
cmds[i] = strings.TrimSpace(c)
}
log.Debugf("Cmds: %+v", cmds)
pipedCmds := make([]*exec.Cmd, len(cmds))
// Initialize each command in the sequence
@@ -31,20 +45,16 @@ func InitPipedCmd(cmds []string) *PipedCmd {
pipedCmds[i] = exec.Command(cmdArgs[0], cmdArgs[1:]...)
}
pipedCmd = &PipedCmd{
cmds: pipedCmds,
finished: make(chan struct{}),
}
return pipedCmd
p.cmds = pipedCmds
}
// Start begins execution of all commands in the piped sequence.
func (p *PipedCmd) Start() error {
p.mu.Lock()
defer p.mu.Unlock()
mu.Lock()
defer mu.Unlock()
if p.running {
log.Println("Process is already running.")
log.Debugf("Process is already running.")
return nil
}
@@ -56,12 +66,17 @@ func (p *PipedCmd) Start() error {
}
p.cmds[i+1].Stdin = stdout
}
// pipe stdout and stderr of the last command into os
p.cmds[len(p.cmds)-1].Stdout = os.Stdout
p.cmds[len(p.cmds)-1].Stderr = os.Stderr
// Start each command in the sequence
for _, cmd := range p.cmds {
if err := cmd.Start(); err != nil {
p.terminateAll() // Clean up if any command fails to start
p.terminateAll()
return err
} else {
log.Debugf("Started process: (%d) %v", cmd.Process.Pid, cmd.Args)
}
}
@@ -82,8 +97,8 @@ func (p *PipedCmd) monitorCommands() {
go func(cmd *exec.Cmd) {
defer wg.Done()
err := cmd.Wait()
if err != nil {
log.Printf("Command failed: %v", err)
if err != nil && err.Error() != "signal: terminated" {
log.Debugf("Command failed: %v", err)
p.terminateAll() // Terminate all if any command fails
}
}(cmd)
@@ -91,179 +106,33 @@ func (p *PipedCmd) monitorCommands() {
// Wait for all commands to complete or terminate
wg.Wait()
p.mu.Lock()
mu.Lock()
defer mu.Unlock()
p.running = false
close(p.finished)
p.mu.Unlock()
}
// terminateAll sends a termination signal to all running commands.
func (p *PipedCmd) terminateAll() {
p.mu.Lock()
defer p.mu.Unlock()
for _, cmd := range p.cmds {
if cmd.Process != nil {
log.Debugf("Sending SIGTERM to: (%d) %v", cmd.Process.Pid, cmd.Args)
_ = cmd.Process.Signal(syscall.SIGTERM) // Send SIGTERM to allow graceful termination
}
}
p.running = false
}
// Stop manually stops all commands in the sequence.
func (p *PipedCmd) Stop() {
p.mu.Lock()
defer p.mu.Unlock()
mu.Lock()
defer mu.Unlock()
if !p.running {
log.Println("Process is not running.")
log.Debug("Process is not running.")
return
}
log.Println("Stopping process...")
log.Debug("Stopping process...")
p.terminateAll()
p.running = false
close(p.finished)
}
/*
import (
"os"
"os/exec"
"strings"
"sync"
log "github.com/sirupsen/logrus"
)
type PipedCmd struct {
cmds []string
cmdsExec []*exec.Cmd
mu sync.Mutex
running bool
stopChan chan struct{}
finished chan struct{}
}
// Init initializes the PipedCmd with a slice of command strings
func InitPipedCmd(cmds []string) *PipedCmd {
return &PipedCmd{
cmds: cmds,
}
}
// Start initializes and starts the piped commands
func (p *PipedCmd) Start() {
p.mu.Lock()
defer p.mu.Unlock()
if p.running {
log.Debug("process is already running.")
return
}
p.stopChan = make(chan struct{})
p.finished = make(chan struct{})
log.Debugf("Starting piped commands: <%s>", strings.Join(p.cmds, " | "))
// Create commands and set up pipes
for i, cmdStr := range p.cmds {
// Split command string into command and arguments
cmdParts := strings.Fields(cmdStr)
if len(cmdParts) == 0 {
log.Errorf("Empty command string at index %d", i)
continue
}
cmd := exec.Command(cmdParts[0], cmdParts[1:]...)
// Set up pipes for stdin/stdout
if i > 0 {
stdin, err := p.cmdsExec[i-1].StdoutPipe()
if err != nil {
log.Errorf("Couldn't set up stdout pipe for command %s: %v", p.cmdsExec[i-1].Path, err)
return
}
cmd.Stdin = stdin
}
cmd.Stderr = os.Stderr // Log stderr to standard error output
p.cmdsExec = append(p.cmdsExec, cmd)
}
// Start the first command
if err := p.cmdsExec[0].Start(); err != nil {
log.Errorf("Failed to start command: %v", err)
return
}
p.running = true
// Start remaining commands
for _, cmd := range p.cmdsExec[1:] {
if err := cmd.Start(); err != nil {
log.Errorf("Failed to start command: %v", err)
return
}
}
go func() {
// Wait for the last command to finish
err := p.cmdsExec[len(p.cmdsExec)-1].Wait()
p.running = false
log.Errorf("process exited with error: %v", err)
// Signal that the process has finished
close(p.finished)
close(p.stopChan)
}()
}
// Stop terminates the piped commands gracefully
func (p *PipedCmd) Stop() {
p.mu.Lock()
defer p.mu.Unlock()
if !p.running {
log.Debug("process is not running.")
return
}
log.Warn("Stopping process...")
for _, cmd := range p.cmdsExec {
if err := cmd.Process.Kill(); err != nil {
log.Errorf("Failed to kill process: %v", err)
}
}
select {
case <-p.finished:
log.Info("stopped as expected")
case <-p.stopChan:
log.Info("was killed")
}
p.running = false
}
// ChangeArgs updates the command arguments
func (p *PipedCmd) ChangeArgs(newCmds []string) {
p.mu.Lock()
defer p.mu.Unlock()
p.cmds = newCmds
log.Printf("Updated process commands: %v", p.cmds)
}
// Watch monitors the process and restarts if it stops unexpectedly
func (p *PipedCmd) Watch() {
for {
select {
case <-p.stopChan:
log.Errorf("process stopped unexpectedly. Restarting...")
p.Start()
}
}
}
*/