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Remove pause mutex/add pthread cleanup function

No more mutex locking/checking for quit condition. Should (slightly)
increase responsiveness of the player thread. Closes #250.
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1 parent c4330c3 commit 7df9371491e96a99c1e463f7787aede352ac5a37 @PromyLOPh committed Apr 20, 2012
Showing with 106 additions and 87 deletions.
  1. +8 −12 src/main.c
  2. +74 −61 src/player.c
  3. +8 −5 src/player.h
  4. +16 −9 src/ui_act.c
View
20 src/main.c
@@ -183,7 +183,7 @@ static void BarMainGetPlaylist (BarApp_t *app) {
/* start new player thread
*/
-static void BarMainStartPlayback (BarApp_t *app, pthread_t *playerThread) {
+static void BarMainStartPlayback (BarApp_t *app) {
BarUiPrintSong (&app->settings, app->playlist, app->curStation->isQuickMix ?
PianoFindStationById (app->ph.stations,
app->playlist->stationId) : NULL);
@@ -216,26 +216,24 @@ static void BarMainStartPlayback (BarApp_t *app, pthread_t *playerThread) {
* thread has been started */
app->player.mode = PLAYER_STARTING;
/* start player */
- pthread_create (playerThread, NULL, BarPlayerThread,
+ pthread_create (&app->player.thread, NULL, BarPlayerThread,
&app->player);
}
}
/* player is done, clean up
*/
-static void BarMainPlayerCleanup (BarApp_t *app, pthread_t *playerThread) {
- void *threadRet;
-
+static void BarMainPlayerCleanup (BarApp_t *app) {
BarUiStartEventCmd (&app->settings, "songfinish", app->curStation,
app->playlist, &app->player, app->ph.stations, PIANO_RET_OK,
WAITRESS_RET_OK);
/* FIXME: pthread_join blocks everything if network connection
* is hung up e.g. */
- pthread_join (*playerThread, &threadRet);
+ pthread_join (app->player.thread, NULL);
/* don't continue playback if thread reports error */
- if (threadRet != (void *) PLAYER_RET_OK) {
+ if (app->player.ret != PLAYER_RET_OK) {
app->curStation = NULL;
}
@@ -265,8 +263,6 @@ static void BarMainPrintTime (BarApp_t *app) {
/* main loop
*/
static void BarMainLoop (BarApp_t *app) {
- pthread_t playerThread;
-
BarMainGetLoginCredentials (&app->settings, &app->input);
BarMainLoadProxy (&app->settings, &app->waith);
@@ -288,7 +284,7 @@ static void BarMainLoop (BarApp_t *app) {
while (!app->doQuit) {
/* song finished playing, clean up things/scrobble song */
if (app->player.mode == PLAYER_FINISHED_PLAYBACK) {
- BarMainPlayerCleanup (app, &playerThread);
+ BarMainPlayerCleanup (app);
}
/* check whether player finished playing and start playing new
@@ -305,7 +301,7 @@ static void BarMainLoop (BarApp_t *app) {
}
/* song ready to play */
if (app->playlist != NULL) {
- BarMainStartPlayback (app, &playerThread);
+ BarMainStartPlayback (app);
}
}
@@ -319,7 +315,7 @@ static void BarMainLoop (BarApp_t *app) {
}
if (app->player.mode != PLAYER_FREED) {
- pthread_join (playerThread, NULL);
+ BarMainPlayerCleanup (app);
}
}
View
135 src/player.c
@@ -1,5 +1,5 @@
/*
-Copyright (c) 2008-2011
+Copyright (c) 2008-2012
Lars-Dominik Braun <lars@6xq.net>
Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -23,12 +23,17 @@ THE SOFTWARE.
/* receive/play audio stream */
+#ifndef __FreeBSD__
+#define _POSIX_C_SOURCE 1 /* sigaction() */
+#endif
+
#include <unistd.h>
#include <string.h>
#include <math.h>
#include <stdint.h>
#include <limits.h>
#include <arpa/inet.h>
+#include <signal.h>
#include "player.h"
#include "config.h"
@@ -37,16 +42,6 @@ THE SOFTWARE.
#define bigToHostEndian32(x) ntohl(x)
-/* wait while locked, but don't slow down main thread by keeping
- * locks too long */
-#define QUIT_PAUSE_CHECK \
- pthread_mutex_lock (&player->pauseMutex); \
- pthread_mutex_unlock (&player->pauseMutex); \
- if (player->doQuit) { \
- /* err => abort playback */ \
- return WAITRESS_CB_RET_ERR; \
- }
-
/* pandora uses float values with 2 digits precision. Scale them by 100 to get
* a "nice" integer */
#define RG_SCALE_FACTOR 100
@@ -79,6 +74,20 @@ static inline signed short int applyReplayGain (const signed short int value,
}
}
+/* handles bogus signal BAR_PLAYER_SIGCONT
+ */
+static void BarPlayerNullHandler (int sig) {
+}
+
+/* handler signal BAR_PLAYER_SIGSTOP and pauses player thread
+ */
+static void BarPlayerPauseHandler (int sig) {
+ /* for a reason I don’t know sigsuspend does not work here, so we use
+ * pause, which should be fine as there are no other (expected) signals
+ * than SIGCONT */
+ pause ();
+}
+
/* Refill player's buffer with dataSize of data
* @param player structure
* @param new data
@@ -124,8 +133,6 @@ static WaitressCbReturn_t BarPlayerAACCb (void *ptr, size_t size,
const char *data = ptr;
struct audioPlayer *player = stream;
- QUIT_PAUSE_CHECK;
-
if (!BarPlayerBufferFill (player, data, size)) {
return WAITRESS_CB_RET_ERR;
}
@@ -159,9 +166,6 @@ static WaitressCbReturn_t BarPlayerAACCb (void *ptr, size_t size,
(unsigned long long int) player->channels;
player->bufferRead += frameInfo.bytesconsumed;
player->sampleSizeCurr++;
- /* going through this loop can take up to a few seconds =>
- * allow earlier thread abort */
- QUIT_PAUSE_CHECK;
}
} else {
if (player->mode == PLAYER_INITIALIZED) {
@@ -205,7 +209,7 @@ static WaitressCbReturn_t BarPlayerAACCb (void *ptr, size_t size,
if ((player->audioOutDevice = ao_open_live (audioOutDriver,
&format, NULL)) == NULL) {
/* we're not interested in the errno */
- player->aoError = 1;
+ player->ret = PLAYER_RET_ERR;
BarUiMsg (player->settings, MSG_ERR,
"Cannot open audio device\n");
return WAITRESS_CB_RET_ERR;
@@ -314,8 +318,6 @@ static WaitressCbReturn_t BarPlayerMp3Cb (void *ptr, size_t size,
struct audioPlayer *player = stream;
size_t i;
- QUIT_PAUSE_CHECK;
-
if (!BarPlayerBufferFill (player, data, size)) {
return WAITRESS_CB_RET_ERR;
}
@@ -368,7 +370,7 @@ static WaitressCbReturn_t BarPlayerMp3Cb (void *ptr, size_t size,
format.byte_format = AO_FMT_NATIVE;
if ((player->audioOutDevice = ao_open_live (audioOutDriver,
&format, NULL)) == NULL) {
- player->aoError = 1;
+ player->ret = PLAYER_RET_ERR;
BarUiMsg (player->settings, MSG_ERR,
"Cannot open audio device\n");
return WAITRESS_CB_RET_ERR;
@@ -395,8 +397,6 @@ static WaitressCbReturn_t BarPlayerMp3Cb (void *ptr, size_t size,
(unsigned long long int) BAR_PLAYER_MS_TO_S_FACTOR /
(unsigned long long int) player->samplerate;
}
-
- QUIT_PAUSE_CHECK;
} while (player->mp3Stream.error != MAD_ERROR_BUFLEN);
player->bufferRead += player->mp3Stream.next_frame - player->buffer;
@@ -407,25 +407,71 @@ static WaitressCbReturn_t BarPlayerMp3Cb (void *ptr, size_t size,
}
#endif /* ENABLE_MAD */
+/* player cleanup function
+ * @param player structure
+ */
+static void BarPlayerCleanup (void *data) {
+ struct audioPlayer *player = data;
+
+ switch (player->audioFormat) {
+ #ifdef ENABLE_FAAD
+ case PIANO_AF_AACPLUS_LO:
+ case PIANO_AF_AACPLUS:
+ NeAACDecClose(player->aacHandle);
+ free (player->sampleSize);
+ break;
+ #endif /* ENABLE_FAAD */
+
+ #ifdef ENABLE_MAD
+ case PIANO_AF_MP3:
+ case PIANO_AF_MP3_HI:
+ mad_synth_finish (&player->mp3Synth);
+ mad_frame_finish (&player->mp3Frame);
+ mad_stream_finish (&player->mp3Stream);
+ break;
+ #endif /* ENABLE_MAD */
+
+ default:
+ /* this should never happen */
+ break;
+ }
+
+ ao_close(player->audioOutDevice);
+ WaitressFree (&player->waith);
+ free (player->buffer);
+
+ player->mode = PLAYER_FINISHED_PLAYBACK;
+}
+
/* player thread; for every song a new thread is started
* @param audioPlayer structure
* @return PLAYER_RET_*
*/
void *BarPlayerThread (void *data) {
struct audioPlayer *player = data;
char extraHeaders[32];
- void *ret = PLAYER_RET_OK;
#ifdef ENABLE_FAAD
NeAACDecConfigurationPtr conf;
#endif
WaitressReturn_t wRet = WAITRESS_RET_ERR;
+ struct sigaction sa;
+
+ /* set up pause signals */
+ memset (&sa, 0, sizeof (sa));
+ sa.sa_handler = BarPlayerPauseHandler;
+ sigaction (BAR_PLAYER_SIGSTOP, &sa, NULL);
+ memset (&sa, 0, sizeof (sa));
+ sa.sa_handler = BarPlayerNullHandler;
+ sigaction (BAR_PLAYER_SIGCONT, &sa, NULL);
+ /* set up cleanup function */
+ pthread_cleanup_push (BarPlayerCleanup, data);
/* init handles */
- pthread_mutex_init (&player->pauseMutex, NULL);
player->waith.data = (void *) player;
/* extraHeaders will be initialized later */
player->waith.extraHeaders = extraHeaders;
player->buffer = malloc (BAR_PLAYER_BUFSIZE);
+ player->ret = PLAYER_RET_OK;
switch (player->audioFormat) {
#ifdef ENABLE_FAAD
@@ -454,9 +500,8 @@ void *BarPlayerThread (void *data) {
#endif /* ENABLE_MAD */
default:
- /* FIXME: leaks memory */
BarUiMsg (player->settings, MSG_ERR, "Unsupported audio format!\n");
- return PLAYER_RET_OK;
+ pthread_exit (PLAYER_RET_OK);
break;
}
@@ -471,39 +516,7 @@ void *BarPlayerThread (void *data) {
} while (wRet == WAITRESS_RET_PARTIAL_FILE || wRet == WAITRESS_RET_TIMEOUT
|| wRet == WAITRESS_RET_READ_ERR);
- switch (player->audioFormat) {
- #ifdef ENABLE_FAAD
- case PIANO_AF_AACPLUS_LO:
- case PIANO_AF_AACPLUS:
- NeAACDecClose(player->aacHandle);
- free (player->sampleSize);
- break;
- #endif /* ENABLE_FAAD */
-
- #ifdef ENABLE_MAD
- case PIANO_AF_MP3:
- case PIANO_AF_MP3_HI:
- mad_synth_finish (&player->mp3Synth);
- mad_frame_finish (&player->mp3Frame);
- mad_stream_finish (&player->mp3Stream);
- break;
- #endif /* ENABLE_MAD */
-
- default:
- /* this should never happen: thread is aborted above */
- break;
- }
-
- if (player->aoError) {
- ret = (void *) PLAYER_RET_ERR;
- }
-
- ao_close(player->audioOutDevice);
- WaitressFree (&player->waith);
- pthread_mutex_destroy (&player->pauseMutex);
- free (player->buffer);
-
- player->mode = PLAYER_FINISHED_PLAYBACK;
-
- return ret;
+ /* cleanup */
+ pthread_cleanup_pop (!0);
+ return NULL;
}
View
13 src/player.h
@@ -47,11 +47,11 @@ THE SOFTWARE.
#define BAR_PLAYER_MS_TO_S_FACTOR 1000
#define BAR_PLAYER_BUFSIZE (WAITRESS_BUFFER_SIZE*2)
+#define BAR_PLAYER_SIGSTOP SIGRTMIN
+#define BAR_PLAYER_SIGCONT SIGRTMIN+1
struct audioPlayer {
- char doQuit;
unsigned char channels;
- unsigned char aoError;
enum {
PLAYER_FREED = 0, /* thread is not running */
@@ -64,6 +64,10 @@ struct audioPlayer {
PLAYER_RECV_DATA, /* playing track */
PLAYER_FINISHED_PLAYBACK
} mode;
+ enum {
+ PLAYER_RET_OK = 0,
+ PLAYER_RET_ERR = 1,
+ } ret;
PianoAudioFormat_t audioFormat;
unsigned int scale;
@@ -101,12 +105,11 @@ struct audioPlayer {
unsigned char *buffer;
- pthread_mutex_t pauseMutex;
+ bool paused;
+ pthread_t thread;
WaitressHandle_t waith;
};
-enum {PLAYER_RET_OK = 0, PLAYER_RET_ERR = 1};
-
void *BarPlayerThread (void *data);
unsigned int BarPlayerCalcScale (float);
View
25 src/ui_act.c
@@ -23,10 +23,14 @@ THE SOFTWARE.
/* functions responding to user's keystrokes */
+#ifndef __FreeBSD__
+#define _POSIX_C_SOURCE 200112L /* pthread_kill() */
+#endif
+
#include <string.h>
#include <unistd.h>
-#include <pthread.h>
#include <assert.h>
+#include <signal.h>
#include "ui.h"
#include "ui_readline.h"
@@ -49,10 +53,9 @@ THE SOFTWARE.
static inline void BarUiDoSkipSong (struct audioPlayer *player) {
assert (player != NULL);
- player->doQuit = 1;
- /* unlocking an unlocked mutex is forbidden by some implementations */
- pthread_mutex_trylock (&player->pauseMutex);
- pthread_mutex_unlock (&player->pauseMutex);
+ if (player->mode != PLAYER_FINISHED_PLAYBACK && player->mode != PLAYER_FREED) {
+ pthread_cancel (player->thread);
+ }
}
/* transform station if necessary to allow changes like rename, rate, ...
@@ -344,9 +347,12 @@ BarUiActCallback(BarUiActMoveSong) {
/* pause
*/
BarUiActCallback(BarUiActPause) {
- /* already locked => unlock/unpause */
- if (pthread_mutex_trylock (&app->player.pauseMutex) == EBUSY) {
- pthread_mutex_unlock (&app->player.pauseMutex);
+ if (app->player.paused) {
+ pthread_kill (app->player.thread, BAR_PLAYER_SIGCONT);
+ app->player.paused = false;
+ } else {
+ pthread_kill (app->player.thread, BAR_PLAYER_SIGSTOP);
+ app->player.paused = true;
}
}
@@ -489,8 +495,9 @@ BarUiActCallback(BarUiActSelectQuickMix) {
/* quit
*/
BarUiActCallback(BarUiActQuit) {
- app->doQuit = 1;
+ /* cancels player thread */
BarUiDoSkipSong (&app->player);
+ app->doQuit = 1;
}
/* song history

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