PulseAudio player seems to kinda work, it just doesn't report playback position yet
Originally committed to SVN as r1120.
This commit is contained in:
Niels Martin Hansen
parent
760cb49475
commit
15a5e39fff
1 changed files with 261 additions and 255 deletions
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@ -37,12 +37,12 @@
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///////////
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// Headers
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#include <wx/wxprec.h>
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#include <stdio.h>
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#include "audio_player.h"
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#include "audio_provider.h"
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#include "utils.h"
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#include "options.h"
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#include <pulse/pulseaudio.h>
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#include <pulse/simple.h>
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//////////////
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@ -50,54 +50,47 @@
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class PulseAudioPlayer;
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//////////
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// Thread
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class PulseAudioPlayerThread : public wxThread {
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private:
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wxMutex play_mutex; // held while playing
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wxSemaphore play_notify; // posted when a playback operation is set up
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wxSemaphore stop_notify; // when set, audio playback should stop asap
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wxSemaphore shutdown_notify; // when set, thread should shutdown asap
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wxMutex parameter_mutex;
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AudioProvider *provider; // provides sample data!
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pa_simple *s; // stream handle
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int paerror;
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volatile double volume; // volume to get audio at
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volatile unsigned long start_frame; // first frame of playback
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volatile unsigned long cur_frame; // last written frame + 1
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volatile unsigned long end_frame; // last frame to play
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void PlaybackLoop();
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public:
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PulseAudioPlayerThread(AudioProvider *_provider);
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~PulseAudioPlayerThread();
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wxThread::ExitCode Entry();
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// The following methods are all thread safe
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void Play(unsigned long _start_frame, unsigned long _num_frames); // Notify thread to stop any playback and instead play specified range
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void SetEndPosition(unsigned long _end_frame); // Notify thread to use new end position
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void Stop(); // Notify thread to stop audio playback
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void StopWait(); // Notify thread to stop, and wait for it to do it
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void Shutdown(); // Notify the thread to stop playback and die
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void SetVolume(double new_volume); // Set volume
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unsigned long GetStartPosition(); // Get first played back frame number
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unsigned long GetEndPosition(); // Get last frame number to be played back
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unsigned long GetCurrentPosition(); // Get currently played back frame number
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bool IsPlaying();
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};
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//////////////////////
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// Pulse Audio player
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class PulseAudioPlayer : public AudioPlayer {
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private:
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float volume;
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bool open;
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bool is_playing;
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PulseAudioPlayerThread *thread;
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// Audio data info
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unsigned long start_frame;
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unsigned long cur_frame;
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unsigned long end_frame;
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unsigned long bpf; // bytes per frame
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// Used for synchronising with async events
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wxSemaphore context_notify;
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wxSemaphore context_success;
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volatile int context_success_val;
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wxSemaphore stream_notify;
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wxSemaphore stream_success;
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volatile int stream_success_val;
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// PulseAudio data
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pa_threaded_mainloop *mainloop; // pulseaudio mainloop handle
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pa_context *context; // connection context
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volatile pa_context_state_t cstate;
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pa_stream *stream;
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volatile pa_stream_state_t sstate;
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int paerror;
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// Called by PA to notify about contetxt operation completion
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static void pa_context_success(pa_context *c, int success, PulseAudioPlayer *thread);
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// Called by PA to notify about other context-related stuff
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static void pa_context_notify(pa_context *c, PulseAudioPlayer *thread);
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// Called by PA when a stream operation completes
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static void pa_stream_success(pa_stream *p, int success, PulseAudioPlayer *thread);
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// Called by PA to request more data written to stream
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static void pa_stream_write(pa_stream *p, size_t length, PulseAudioPlayer *thread);
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// Called by PA to notify about other stream-related stuff
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static void pa_stream_notify(pa_stream *p, PulseAudioPlayer *thread);
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public:
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PulseAudioPlayer();
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@ -134,295 +127,308 @@ public:
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///////////////
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// Constructor
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PulseAudioPlayer::PulseAudioPlayer() {
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PulseAudioPlayer::PulseAudioPlayer()
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{
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volume = 1.0f;
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thread = NULL;
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paerror = 0;
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open = false;
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is_playing = false;
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}
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//////////////
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// Destructor
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PulseAudioPlayer::~PulseAudioPlayer() {
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CloseStream();
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PulseAudioPlayer::~PulseAudioPlayer()
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{
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if (open) CloseStream();
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}
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///////////////
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// Open stream
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void PulseAudioPlayer::OpenStream() {
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CloseStream();
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void PulseAudioPlayer::OpenStream()
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{
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printf("Opening PulseAudio stream\n");
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if (open) CloseStream();
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// Get provider
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AudioProvider *provider = GetProvider();
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try {
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thread = new PulseAudioPlayerThread(provider);
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thread->Create();
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thread->Run();
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// Initialise a mainloop
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printf("Initialising threaded main loop\n");
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mainloop = pa_threaded_mainloop_new();
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if (!mainloop) {
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throw _T("Failed to initialise PulseAudio threaded mainloop object");
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}
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catch (const char *e) {
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wxLogError(_T("Failed to initialise PulseAudio: %s"), wxString(e, wxConvLocal).c_str());
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printf("Starting main loop\n");
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pa_threaded_mainloop_start(mainloop);
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// Create context
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printf("Creating context\n");
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context = pa_context_new(pa_threaded_mainloop_get_api(mainloop), "Aegisub");
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if (!context) {
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pa_threaded_mainloop_free(mainloop);
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throw _T("Failed to create PulseAudio context");
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}
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pa_context_set_state_callback(context, (pa_context_notify_cb_t)pa_context_notify, this);
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// Connect the context
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printf("Connecting context\n");
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pa_context_connect(context, NULL, 0, NULL);
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// Wait for connection
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while (true) {
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context_notify.Wait();
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if (cstate == PA_CONTEXT_READY) {
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break;
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} else if (cstate == PA_CONTEXT_FAILED) {
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// eww
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paerror = pa_context_errno(context);
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pa_context_unref(context);
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pa_threaded_mainloop_stop(mainloop);
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pa_threaded_mainloop_free(mainloop);
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wxString s(pa_strerror(paerror), wxConvUTF8);
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throw s.c_str();
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}
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// otherwise loop once more
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}
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printf("Context connected\n");
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// Set up stream
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bpf = provider->GetChannels() * provider->GetBytesPerSample();
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pa_sample_spec ss;
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ss.format = PA_SAMPLE_S16LE; // FIXME
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ss.rate = provider->GetSampleRate();
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ss.channels = provider->GetChannels();
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pa_channel_map map;
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pa_channel_map_init_auto(&map, ss.channels, PA_CHANNEL_MAP_DEFAULT);
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printf("Creating stream\n");
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stream = pa_stream_new(context, "Sound", &ss, &map);
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if (!stream) {
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// argh!
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pa_context_disconnect(context);
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pa_context_unref(context);
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pa_threaded_mainloop_stop(mainloop);
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pa_threaded_mainloop_free(mainloop);
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throw _T("PulseAudio could not create stream");
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}
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pa_stream_set_state_callback(stream, (pa_stream_notify_cb_t)pa_stream_notify, this);
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pa_stream_set_write_callback(stream, (pa_stream_request_cb_t)pa_stream_write, this);
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// Connext stream
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printf("Connecting playback stream\n");
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paerror = pa_stream_connect_playback(stream, NULL, NULL, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_NOT_MONOTONOUS|PA_STREAM_AUTO_TIMING_UPDATE, NULL, NULL);
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if (paerror) {
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printf("PulseAudio reported error: %s\n", pa_strerror(paerror));
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wxString s(pa_strerror(paerror), wxConvUTF8);
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throw s.c_str();
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}
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while (true) {
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stream_notify.Wait();
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if (sstate == PA_STREAM_READY) {
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break;
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} else if (sstate == PA_STREAM_FAILED) {
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printf("Stream connection failed for some reason\n");
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throw _T("Something went wrong connecting the stream");
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}
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}
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printf("Connected playback stream, now playing\n\n");
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// Hopefully this marks success
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printf("Finished opening PulseAudio\n\n");
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open = true;
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}
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////////////////
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// Close stream
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void PulseAudioPlayer::CloseStream() {
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if (!thread) return;
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void PulseAudioPlayer::CloseStream()
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{
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if (!open) return;
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printf("Closing PuseAudio\n");
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thread->Shutdown();
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thread->Wait();
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thread = 0;
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if (is_playing) Stop();
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// Hope for the best and just do things as quickly as possible
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pa_stream_disconnect(stream);
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pa_stream_unref(stream);
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pa_context_disconnect(context);
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pa_context_unref(context);
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pa_threaded_mainloop_stop(mainloop);
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pa_threaded_mainloop_free(mainloop);
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printf("Closed PulseAudio\n");
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open = false;
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}
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////////
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// Play
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void PulseAudioPlayer::Play(__int64 start,__int64 count) {
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// Make sure that it's stopped
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thread->Stop();
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void PulseAudioPlayer::Play(__int64 start,__int64 count)
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{
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printf("Starting PulseAudio playback\n");
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if (!open) OpenStream();
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if (is_playing) Stop();
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thread->Play(start, count);
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start_frame = start;
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cur_frame = start;
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end_frame = start + count;
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printf("start=%lu end=%lu\n", start_frame, end_frame);
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is_playing = true;
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PulseAudioPlayer::pa_stream_write(stream, pa_stream_writable_size(stream), this);
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pa_operation *op = pa_stream_trigger(stream, (pa_stream_success_cb_t)pa_stream_success, this);
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stream_success.Wait();
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pa_operation_unref(op);
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}
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////////
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// Stop
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void PulseAudioPlayer::Stop(bool timerToo) {
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if (thread) thread->Stop();
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void PulseAudioPlayer::Stop(bool timerToo)
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{
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if (!is_playing) return;
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printf("Stopping PulseAudio\n");
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if (timerToo && displayTimer) {
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displayTimer->Stop();
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is_playing = false;
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pa_operation *op = pa_stream_cork(stream, 0, (pa_stream_success_cb_t)pa_stream_success, this);
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stream_success.Wait();
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pa_operation_unref(op);
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start_frame = 0;
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cur_frame = 0;
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end_frame = 0;
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// Flush the stream of data
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printf("Draining stream\n");
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op = pa_stream_flush(stream, (pa_stream_success_cb_t)pa_stream_success, this);
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stream_success.Wait();
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pa_operation_unref(op);
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// Then disconnect it
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/*printf("Disconnecting stream\n");
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paerror = pa_stream_disconnect(stream);
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if (paerror) {
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printf("PulseAudio reported error: %s\n", pa_strerror(paerror));
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wxString s(pa_strerror(paerror), wxConvUTF8);
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throw s.c_str();
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}
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while (true) {
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stream_notify.Wait();
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if (sstate == PA_STREAM_TERMINATED) {
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break;
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} else if (sstate == PA_STREAM_FAILED) {
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printf("Stream stopping failed\n");
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throw _T("Something went wrong disconnecting the stream?!");
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}
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}*/
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// And unref it
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printf("Stopped stream\n\n");
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}
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bool PulseAudioPlayer::IsPlaying()
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{
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return thread && thread->IsPlaying();
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return is_playing;
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}
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///////////
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// Set end
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void PulseAudioPlayer::SetEndPosition(__int64 pos) {
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if (thread) thread->SetEndPosition(pos);
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void PulseAudioPlayer::SetEndPosition(__int64 pos)
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{
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end_frame = pos;
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}
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////////////////////////
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// Set current position
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void PulseAudioPlayer::SetCurrentPosition(__int64 pos) {
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assert(false); // not supported (yet?)
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// I believe this isn't used anywhere. I hope not.
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void PulseAudioPlayer::SetCurrentPosition(__int64 pos)
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{
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cur_frame = pos;
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}
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__int64 PulseAudioPlayer::GetStartPosition()
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{
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if (thread) return thread->GetStartPosition();
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return 0;
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return start_frame;
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}
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__int64 PulseAudioPlayer::GetEndPosition()
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{
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if (thread) return thread->GetEndPosition();
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return 0;
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return end_frame;
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}
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////////////////////////
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// Get current position
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__int64 PulseAudioPlayer::GetCurrentPosition() {
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if (thread) return thread->GetCurrentPosition();
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return 0;
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}
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//////////////////////
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// Thread constructor
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PulseAudioPlayerThread::PulseAudioPlayerThread(AudioProvider *_provider)
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: wxThread(wxTHREAD_JOINABLE)
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, play_notify(0, 1)
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, stop_notify(0, 1)
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, shutdown_notify(0, 1)
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, provider(_provider)
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__int64 PulseAudioPlayer::GetCurrentPosition()
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{
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pa_sample_spec ss;
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ss.format = PA_SAMPLE_S16LE;
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ss.channels = provider->GetChannels();
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ss.rate = provider->GetSampleRate();
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s = pa_simple_new(
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NULL, // default server
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"Aegisub", // application name
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PA_STREAM_PLAYBACK,
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NULL, // default device
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"Sound", // stream description
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&ss, // sample format
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NULL, // default channel map
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NULL, // default buffering attributes
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&paerror // store error code
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);
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if (!s) throw pa_strerror(paerror);
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// TODO: use pulse functions
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return cur_frame;
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}
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/////////////////////
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// Thread destructor
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PulseAudioPlayerThread::~PulseAudioPlayerThread() {
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pa_simple_free(s);
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}
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//////////////////////
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// Thread entry point
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wxThread::ExitCode PulseAudioPlayerThread::Entry()
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// Called by PA to notify about contetxt operation completion
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void PulseAudioPlayer::pa_context_success(pa_context *c, int success, PulseAudioPlayer *thread)
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{
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// Loop as long as we aren't told to shutdown
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while (shutdown_notify.TryWait() == wxSEMA_BUSY) {
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// Wait for a playback operation
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if (play_notify.WaitTimeout(100) == wxSEMA_NO_ERROR) {
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// So playback was posted... now play something
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play_mutex.Lock();
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PlaybackLoop();
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play_mutex.Unlock();
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}
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cur_frame = cur_frame / 2;
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thread->context_success_val = success;
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thread->context_success.Post();
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}
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// Called by PA to notify about other context-related stuff
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void PulseAudioPlayer::pa_context_notify(pa_context *c, PulseAudioPlayer *thread)
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{
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thread->cstate = pa_context_get_state(thread->context);
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//printf("Context state change: %d\n", thread->cstate);
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thread->context_notify.Post();
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}
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// Called by PA when an operation completes
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void PulseAudioPlayer::pa_stream_success(pa_stream *p, int success, PulseAudioPlayer *thread)
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{
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thread->stream_success_val = success;
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thread->stream_success.Post();
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}
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// Called by PA to request more data (and other things?)
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void PulseAudioPlayer::pa_stream_write(pa_stream *p, size_t length, PulseAudioPlayer *thread)
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{
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if (!thread->is_playing) return;
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if (thread->cur_frame >= thread->end_frame) {
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thread->is_playing = false;
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printf("PA requested more buffer, but no more to stream\n");
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return;
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}
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return 0;
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printf("PA requested more buffer, %lu bytes\n", (unsigned long)length);
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unsigned long bpf = thread->bpf;
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unsigned long frames = length / thread->bpf;
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unsigned long maxframes = thread->end_frame - thread->cur_frame;
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if (frames > maxframes) frames = maxframes;
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printf("Handing it %lu frames\n", frames);
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void *buf = malloc(frames * bpf);
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thread->provider->GetAudioWithVolume(buf, thread->cur_frame, frames, thread->volume);
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::pa_stream_write(p, buf, frames*bpf, free, 0, PA_SEEK_RELATIVE);
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thread->cur_frame += frames;
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}
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void PulseAudioPlayerThread::PlaybackLoop()
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// Called by PA to notify about other stuff
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void PulseAudioPlayer::pa_stream_notify(pa_stream *p, PulseAudioPlayer *thread)
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{
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// Bytes per frame
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unsigned long bpf = provider->GetChannels() * provider->GetBytesPerSample();
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// Number of frames in a read
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unsigned long datalen = provider->GetSampleRate()/8;
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// Read buffer
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void *data = malloc(datalen * bpf);
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unsigned long cur_pos = 0;
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||||
while (true) {
|
||||
// Get/set parameters
|
||||
parameter_mutex.Lock();
|
||||
double vol = volume;
|
||||
cur_frame = cur_pos;
|
||||
unsigned long end_pos = end_frame;
|
||||
parameter_mutex.Unlock();
|
||||
|
||||
// Check for stop
|
||||
if (stop_notify.TryWait() != wxSEMA_BUSY) {
|
||||
pa_simple_flush(s, &paerror);
|
||||
break;
|
||||
}
|
||||
|
||||
// Check for end of stream
|
||||
if (cur_pos >= end_pos) {
|
||||
pa_simple_drain(s, &paerror);
|
||||
break;
|
||||
}
|
||||
|
||||
// Write some frames
|
||||
unsigned long to_read = datalen;
|
||||
if (cur_pos + to_read > end_pos)
|
||||
to_read = end_pos - cur_pos;
|
||||
provider->GetAudioWithVolume(data, cur_pos, to_read, vol);
|
||||
if (pa_simple_write(s, data, to_read*bpf, &paerror) < 0) break;
|
||||
cur_pos += to_read;
|
||||
}
|
||||
|
||||
free(data);
|
||||
}
|
||||
|
||||
|
||||
void PulseAudioPlayerThread::Play(unsigned long _start_frame, unsigned long _num_frames)
|
||||
{
|
||||
StopWait();
|
||||
|
||||
cur_frame = start_frame = _start_frame;
|
||||
end_frame = start_frame + _num_frames;
|
||||
|
||||
play_notify.Post();
|
||||
}
|
||||
|
||||
|
||||
void PulseAudioPlayerThread::SetEndPosition(unsigned long _end_frame)
|
||||
{
|
||||
parameter_mutex.Lock();
|
||||
end_frame = _end_frame;
|
||||
parameter_mutex.Unlock();
|
||||
}
|
||||
|
||||
|
||||
////////////////////////
|
||||
// Stop playback thread
|
||||
void PulseAudioPlayerThread::Stop()
|
||||
{
|
||||
stop_notify.Post();
|
||||
}
|
||||
|
||||
|
||||
void PulseAudioPlayerThread::StopWait()
|
||||
{
|
||||
stop_notify.Post();
|
||||
// Now wait for the play mutex to have been freed
|
||||
play_mutex.Lock();
|
||||
play_mutex.Unlock();
|
||||
}
|
||||
|
||||
|
||||
void PulseAudioPlayerThread::Shutdown()
|
||||
{
|
||||
Stop();
|
||||
shutdown_notify.Post();
|
||||
}
|
||||
|
||||
|
||||
void PulseAudioPlayerThread::SetVolume(double new_volume)
|
||||
{
|
||||
parameter_mutex.Lock();
|
||||
volume = new_volume;
|
||||
parameter_mutex.Unlock();
|
||||
}
|
||||
|
||||
|
||||
unsigned long PulseAudioPlayerThread::GetStartPosition()
|
||||
{
|
||||
wxMutexLocker lock(parameter_mutex);
|
||||
return start_frame;
|
||||
}
|
||||
|
||||
|
||||
unsigned long PulseAudioPlayerThread::GetEndPosition()
|
||||
{
|
||||
wxMutexLocker lock(parameter_mutex);
|
||||
return end_frame;
|
||||
}
|
||||
|
||||
|
||||
unsigned long PulseAudioPlayerThread::GetCurrentPosition()
|
||||
{
|
||||
// Step 1: Get last written frame number
|
||||
parameter_mutex.Lock();
|
||||
unsigned long pos = cur_frame;
|
||||
parameter_mutex.Unlock();
|
||||
|
||||
// Step 2: ???
|
||||
|
||||
// Step 3: Profit!
|
||||
return pos;
|
||||
}
|
||||
|
||||
|
||||
bool PulseAudioPlayerThread::IsPlaying()
|
||||
{
|
||||
return play_mutex.TryLock() == wxMUTEX_BUSY;
|
||||
thread->sstate = pa_stream_get_state(thread->stream);
|
||||
//printf("Stream state change: %d\n", thread->sstate);
|
||||
thread->stream_notify.Post();
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue