diff options
Diffstat (limited to 'plugins/nullout')
| -rw-r--r-- | plugins/nullout/Makefile.am | 5 | ||||
| -rw-r--r-- | plugins/nullout/nullout.c | 265 |
2 files changed, 270 insertions, 0 deletions
diff --git a/plugins/nullout/Makefile.am b/plugins/nullout/Makefile.am new file mode 100644 index 00000000..da914823 --- /dev/null +++ b/plugins/nullout/Makefile.am @@ -0,0 +1,5 @@ +nulloutdir = $(libdir)/$(PACKAGE) +pkglib_LTLIBRARIES = nullout.la +nullout_la_SOURCES = nullout.c +nullout_la_LDFLAGS = -module +AM_CFLAGS = $(CFLAGS) -std=c99 diff --git a/plugins/nullout/nullout.c b/plugins/nullout/nullout.c new file mode 100644 index 00000000..57980d60 --- /dev/null +++ b/plugins/nullout/nullout.c @@ -0,0 +1,265 @@ +/* + DeaDBeeF - ultimate music player for GNU/Linux systems with X11 + Copyright (C) 2009 Alexey Yakovenko + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ +#include <stdint.h> +#include <unistd.h> +#include <sys/prctl.h> +#include <stdio.h> +#include "deadbeef.h" + +#define trace(...) { fprintf(stderr, __VA_ARGS__); } +//#define trace(fmt,...) + +static DB_output_t plugin; +DB_functions_t *deadbeef; + +static intptr_t null_tid; +static int null_terminate; +static int null_rate; +static int state; + +static void +pnull_callback (char *stream, int len); + +static void +pnull_thread (void *context); + +static int +pnull_init (void); + +static int +pnull_free (void); + +static int +pnull_change_rate (int rate); + +static int +pnull_play (void); + +static int +pnull_stop (void); + +static int +pnull_isstopped (void); + +static int +pnull_ispaused (void); + +static int +pnull_pause (void); + +static int +pnull_unpause (void); + +static int +pnull_get_rate (void); + +static int +pnull_get_bps (void); + +static int +pnull_get_channels (void); + +static int +pnull_get_endianness (void); + +static void +pnull_enum_soundcards (void (*callback)(const char *name, const char *desc, void*), void *userdata); + +int +pnull_init (void) { + state = OUTPUT_STATE_STOPPED; + null_rate = 44100; + null_terminate = 0; + null_tid = deadbeef->thread_start (pnull_thread, NULL); + return 0; +} + +int +pnull_change_rate (int rate) { + null_rate = rate; + return null_rate; +} + +int +pnull_free (void) { + trace ("pnull_free\n"); + if (!null_terminate) { + null_terminate = 1; + deadbeef->thread_join (null_tid); + null_tid = 0; + state = OUTPUT_STATE_STOPPED; + null_terminate = 0; + } + return 0; +} + +int +pnull_play (void) { + state = OUTPUT_STATE_PLAYING; + return 0; +} + +int +pnull_stop (void) { + state = OUTPUT_STATE_STOPPED; + deadbeef->streamer_reset (1); + return 0; +} + +int +pnull_isstopped (void) { + return (state == OUTPUT_STATE_STOPPED); +} + +int +pnull_ispaused (void) { + // return pause state + return (state == OUTPUT_STATE_PAUSED); +} + +int +pnull_pause (void) { + if (state == OUTPUT_STATE_STOPPED) { + return -1; + } + // set pause state + state = OUTPUT_STATE_PAUSED; + return 0; +} + +int +pnull_unpause (void) { + // unset pause state + if (state == OUTPUT_STATE_PAUSED) { + state = OUTPUT_STATE_PLAYING; + } + return 0; +} + +int +pnull_get_rate (void) { + return null_rate; +} + +int +pnull_get_bps (void) { + return 16; +} + +int +pnull_get_channels (void) { + return 2; +} + +static int +pnull_get_endianness (void) { +#if WORDS_BIGENDIAN + return 1; +#else + return 0; +#endif +} + +static void +pnull_thread (void *context) { + prctl (PR_SET_NAME, "deadbeef-null", 0, 0, 0, 0); + int err; + for (;;) { + if (null_terminate) { + break; + } + if (state != OUTPUT_STATE_PLAYING) { + usleep (10000); + continue; + } + + + char buf[4096]; + pnull_callback (buf, 1024); + usleep (1000); // this must be here to prevent mutex deadlock + } +} + +static void +pnull_callback (char *stream, int len) { + if (!deadbeef->streamer_ok_to_read (len)) { + memset (stream, 0, len); + return; + } + int bytesread = deadbeef->streamer_read (stream, len); + + if (bytesread < len) { + memset (stream + bytesread, 0, len-bytesread); + } +} + +// derived from null-utils/aplay.c +void +pnull_enum_soundcards (void (*callback)(const char *name, const char *desc, void *), void *userdata) { + callback ("NULL output", "NULL output", userdata); +} + +int +pnull_get_state (void) { + return state; +} + +int +null_start (void) { + return 0; +} + +int +null_stop (void) { + return 0; +} + +DB_plugin_t * +nullout_load (DB_functions_t *api) { + deadbeef = api; + return DB_PLUGIN (&plugin); +} + +// define plugin interface +static DB_output_t plugin = { + DB_PLUGIN_SET_API_VERSION + .plugin.version_major = 0, + .plugin.version_minor = 1, + .plugin.nostop = 1, + .plugin.type = DB_PLUGIN_OUTPUT, + .plugin.name = "null output plugin", + .plugin.descr = "doesn't play anything", + .plugin.author = "Alexey Yakovenko", + .plugin.email = "waker@users.sourceforge.net", + .plugin.website = "http://deadbeef.sf.net", + .plugin.start = null_start, + .plugin.stop = null_stop, + .init = pnull_init, + .free = pnull_free, + .change_rate = pnull_change_rate, + .play = pnull_play, + .stop = pnull_stop, + .pause = pnull_pause, + .unpause = pnull_unpause, + .state = pnull_get_state, + .samplerate = pnull_get_rate, + .bitspersample = pnull_get_bps, + .channels = pnull_get_channels, + .endianness = pnull_get_endianness, + .enum_soundcards = pnull_enum_soundcards, +}; |