aboutsummaryrefslogblamecommitdiffstats
path: root/src/decoder_thread.c
blob: 040e34f84b503e220194fde6adbbf7b467c558cc (plain) (tree)
1
2
3
                                
                                                                   
                                                      















                                                                            
                           
                            
                             
                           
                 
                 
                   

                 
               
 



                                                       

                 


                                       





                                                                      

 
                             
 
                                         

                                  
                               
                
                                   
                                     
                                            
 
                               
                                                
            




                                                 
 
                                                       
                                                 
                                             
                       
         
 
                                
                                        
 
                                      
                                         
                                  
 



                                                                  



                                                        
 
                                                     



                                                      

         



                                                
 
                    
                                  
                                      

                                              
                                                                                         
                                                          
                                         
                                                                              
                                         
                                                                   
                                         
                                                                         



                                                                 
                                     
                                                       
                                 
                                                                                  
                                                                  
                                                 
                                                            
                                                               
                                                 
                                                                           
                                                 
                                                        

                                                                       

                                      
                 
                                      
                                                                              

                                         

                                                                             
                                                                         
                                                        

                                                                       
                         
                 
                
                                      
                                               
                                                                          
                                                                             
                                         
 
                                                                   
                                         
 
                                                          
                                                              
                                                       
                                                        
                                                                         
                                      
                                                                   
                                                        

                                                                       
                                      

                         
         
 
                           
 



                                              
         
 
                           
                                              

 
                                                
 
                   

                                                      


                                          
                                      


                                                         
                                                  


                                         

                                                         


                                         
                                                
                              
                 
         

                    
 
 
                               





                                                                    
                                                                       
                                                                             
 
/* the Music Player Daemon (MPD)
 * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
 * Copyright (C) 2008 Max Kellermann <max@duempel.org>
 * This project's homepage is: http://www.musicpd.org
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "decoder_thread.h"
#include "decoder_control.h"
#include "decoder_internal.h"
#include "player_control.h"
#include "pipe.h"
#include "song.h"
#include "mapper.h"
#include "path.h"
#include "log.h"
#include "ls.h"

static bool
decoder_try_decode(const struct decoder_plugin *plugin,
		   struct input_stream *input_stream)
{
	bool ret;

	if (plugin->try_decode == NULL)
		return true;

	ret = plugin->try_decode(input_stream);

	/* rewind the stream, so the next reader gets a fresh start */
	input_stream_seek(input_stream, 0, SEEK_SET);

	return ret;
}

static void decodeStart(void)
{
	struct song *song = dc.next_song;
	char buffer[MPD_PATH_MAX];
	const char *uri;
	struct decoder decoder;
	int ret;
	bool close_instream = true;
	struct input_stream inStream;
	const struct decoder_plugin *plugin;

	if (song_is_file(song))
		uri = map_song_fs(song, buffer);
	else
		uri = song_get_url(song, buffer);
	if (uri == NULL) {
		dc.error = DECODE_ERROR_FILE;
		return;
	}

	dc.current_song = dc.next_song; /* NEED LOCK */
	if (!input_stream_open(&inStream, uri)) {
		dc.error = DECODE_ERROR_FILE;
		return;
	}

	decoder.seeking = false;
	decoder.stream_tag_sent = false;

	dc.state = DECODE_STATE_START;
	dc.command = DECODE_COMMAND_NONE;
	notify_signal(&pc.notify);

	/* wait for the input stream to become ready; its metadata
	   will be available then */

	while (!inStream.ready) {
		if (dc.command != DECODE_COMMAND_NONE) {
			input_stream_close(&inStream);
			return;
		}

		ret = input_stream_buffer(&inStream);
		if (ret < 0) {
			input_stream_close(&inStream);
			return;
		}
	}

	if (dc.command == DECODE_COMMAND_STOP) {
		input_stream_close(&inStream);
		return;
	}

	ret = false;
	if (!song_is_file(song)) {
		unsigned int next = 0;

		/* first we try mime types: */
		while ((plugin = decoder_plugin_from_mime_type(inStream.mime, next++))) {
			if (plugin->stream_decode == NULL)
				continue;
			if (!(plugin->stream_types & INPUT_PLUGIN_STREAM_URL))
				continue;
			if (!decoder_try_decode(plugin, &inStream))
				continue;
			ret = plugin->stream_decode(&decoder, &inStream);
			break;
		}

		/* if that fails, try suffix matching the URL: */
		if (plugin == NULL) {
			const char *s = getSuffix(uri);
			next = 0;
			while ((plugin = decoder_plugin_from_suffix(s, next++))) {
				if (plugin->stream_decode == NULL)
					continue;
				if (!(plugin->stream_types &
				      INPUT_PLUGIN_STREAM_URL))
					continue;
				if (!decoder_try_decode(plugin, &inStream))
					continue;
				decoder.plugin = plugin;
				ret = plugin->stream_decode(&decoder,
							    &inStream);
				break;
			}
		}
		/* fallback to mp3: */
		/* this is needed for bastard streams that don't have a suffix
		   or set the mimeType */
		if (plugin == NULL) {
			/* we already know our mp3Plugin supports streams, no
			 * need to check for stream{Types,DecodeFunc} */
			if ((plugin = decoder_plugin_from_name("mp3"))) {
				decoder.plugin = plugin;
				ret = plugin->stream_decode(&decoder,
							    &inStream);
			}
		}
	} else {
		unsigned int next = 0;
		const char *s = getSuffix(uri);
		while ((plugin = decoder_plugin_from_suffix(s, next++))) {
			if (!plugin->stream_types & INPUT_PLUGIN_STREAM_FILE)
				continue;

			if (!decoder_try_decode(plugin, &inStream))
				continue;

			if (plugin->file_decode != NULL) {
				input_stream_close(&inStream);
				close_instream = false;
				decoder.plugin = plugin;
				ret = plugin->file_decode(&decoder, uri);
				break;
			} else if (plugin->stream_decode != NULL) {
				decoder.plugin = plugin;
				ret = plugin->stream_decode(&decoder,
							    &inStream);
				break;
			}
		}
	}

	music_pipe_flush();

	if (!ret) {
		dc.error = plugin == NULL
			? DECODE_ERROR_UNKTYPE
			: DECODE_ERROR_FILE;
	}

	if (close_instream)
		input_stream_close(&inStream);
}

static void * decoder_task(mpd_unused void *arg)
{
	while (1) {
		assert(dc.state == DECODE_STATE_STOP);

		switch (dc.command) {
		case DECODE_COMMAND_START:
		case DECODE_COMMAND_SEEK:
			decodeStart();

			dc.state = DECODE_STATE_STOP;
			dc.command = DECODE_COMMAND_NONE;
			notify_signal(&pc.notify);
			break;

		case DECODE_COMMAND_STOP:
			dc.command = DECODE_COMMAND_NONE;
			notify_signal(&pc.notify);
			break;

		case DECODE_COMMAND_NONE:
			notify_wait(&dc.notify);
			break;
		}
	}

	return NULL;
}

void decoder_thread_start(void)
{
	pthread_attr_t attr;
	pthread_t decoder_thread;

	pthread_attr_init(&attr);
	pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
	if (pthread_create(&decoder_thread, &attr, decoder_task, NULL))
		FATAL("Failed to spawn decoder task: %s\n", strerror(errno));
}