libmpdemux/demux_xmms.c

   1 /*
   2  * Copyright (C) 2002-2004 Balatoni Denes and A'rpi
   3  *
   4  * This file is part of MPlayer.
   5  *
   6  * MPlayer is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * MPlayer is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 // This is not reentrant because of global static variables, but most of
  22 // the plugins are not reentrant either perhaps
  23 #include "config.h"
  24
  25 #include <stdlib.h>
  26 #include <stdio.h>
  27 #include <unistd.h>
  28 #include <pthread.h>
  29 #include <dlfcn.h>
  30 #include <dirent.h>
  31 #include <inttypes.h>
  32 #include <string.h>
  33 #include <sys/stat.h>
  34
  35 #include "m_option.h"
  36 #include "libaf/af_format.h"
  37 #include "stream/stream.h"
  38 #include "demuxer.h"
  39 #include "stheader.h"
  40
  41 #include "mp_msg.h"
  42 #include "help_mp.h"
  43
  44 #define XMMS_PACKETSIZE 65536  // some plugins won't play if this is too small
  45
  46 #include "demux_xmms_plugin.h"
  47
  48 typedef struct {
  49     uint64_t spos;   // stream position in number of output bytes from 00:00:00
  50     InputPlugin* ip;
  51 }  xmms_priv_t;
  52
  53 static pthread_mutex_t xmms_mutex;
  54 static int format = 0x1; // Raw PCM
  55 static char xmms_audiobuffer[XMMS_PACKETSIZE];
  56 static uint32_t xmms_channels;
  57 static uint32_t xmms_samplerate;
  58 static uint32_t xmms_afmt;
  59 static int xmms_length;
  60 static char *xmms_title=NULL;
  61 static uint32_t xmms_audiopos=0;
  62 static int xmms_playing=0;
  63 static xmms_priv_t *xmms_priv=NULL;
  64 static uint32_t xmms_byterate;
  65 static int64_t xmms_flushto=-1;
  66
  67 // =========== mplayer xmms outputplugin stuff  ==============
  68
  69 static void disk_close(void) {}
  70 static void disk_pause(short p) {}
  71 static void disk_init(void) {}
  72
  73 static void disk_flush(int time) {
  74     if (xmms_priv) xmms_flushto=time*((long long) xmms_byterate)/1000LL;
  75 }
  76
  77 static int disk_free(void) { // vqf plugin sends more than it should
  78     return XMMS_PACKETSIZE - xmms_audiopos < XMMS_PACKETSIZE / 4 ?
  79                0 : XMMS_PACKETSIZE - xmms_audiopos - XMMS_PACKETSIZE / 4;
  80 }
  81
  82 static int disk_playing(void) {
  83     return 0; //?? maybe plugins wait on exit until oplugin is not playing?
  84 }
  85
  86 static int disk_get_output_time(void) {
  87     if (xmms_byterate)
  88         return xmms_priv->spos*1000LL/((long long)xmms_byterate);
  89     else return 0;
  90 }
  91
  92 static int disk_open(AFormat fmt, int rate, int nch) {
  93     switch (fmt) {
  94         case FMT_U8:
  95             xmms_afmt=AF_FORMAT_U8;
  96             break;
  97         case FMT_S8:
  98             xmms_afmt=AF_FORMAT_S8;
  99             break;
 100         case FMT_U16_LE:
 101             xmms_afmt=AF_FORMAT_U16_LE;
 102             break;
 103         case FMT_U16_NE:
 104 #ifdef WORDS_BIGENDIAN
 105             xmms_afmt=AF_FORMAT_U16_BE;
 106 #else
 107             xmms_afmt=AF_FORMAT_U16_LE;
 108 #endif
 109             break;
 110         case FMT_U16_BE:
 111             xmms_afmt=AF_FORMAT_U16_BE;
 112             break;
 113         case FMT_S16_NE:
 114             xmms_afmt=AF_FORMAT_S16_NE;
 115             break;
 116         case FMT_S16_LE:
 117             xmms_afmt=AF_FORMAT_S16_LE;
 118             break;
 119         case FMT_S16_BE:
 120             xmms_afmt=AF_FORMAT_S16_BE;
 121             break;
 122     }
 123     xmms_samplerate=rate;
 124     xmms_channels=nch;
 125     return 1;
 126 }
 127
 128 static void disk_write(void *ptr, int length) {
 129     if (!xmms_playing) return;
 130     pthread_mutex_lock(&xmms_mutex);
 131     if (xmms_flushto!=-1) {
 132         xmms_priv->spos=xmms_flushto;
 133         xmms_flushto=-1;
 134         xmms_audiopos=0;
 135     }
 136     xmms_priv->spos+= length;
 137     memcpy(&xmms_audiobuffer[xmms_audiopos],ptr,length);
 138     xmms_audiopos+=length;
 139     pthread_mutex_unlock(&xmms_mutex);
 140 }
 141
 142 static OutputPlugin xmms_output_plugin =
 143 {
 144     NULL,
 145     NULL,
 146     "MPlayer output interface plugin ", /* Description */
 147     disk_init,
 148     NULL,                   /* about */
 149     NULL,                   /* configure */
 150     NULL,                   /* get_volume */
 151     NULL,                   /* set_volume */
 152     disk_open,
 153     disk_write,
 154     disk_close,
 155     disk_flush,
 156     disk_pause,
 157     disk_free,
 158     disk_playing,
 159     disk_get_output_time,
 160     disk_get_output_time //we pretend that everything written is played at once
 161 };
 162
 163 // ==================== mplayer xmms inputplugin helper stuff =================
 164
 165 static InputPlugin* input_plugins[100];
 166 static int no_plugins=0;
 167
 168 /* Dummy functions  */
 169 static InputVisType input_get_vis_type(void){return 0;}
 170 static void input_add_vis_pcm(int time, AFormat fmt, int nch, int length,
 171                                                                 void *ptr){}
 172 static void input_set_info_text(char * text){}
 173 char *xmms_get_gentitle_format(void){ return ""; }
 174 /* Dummy functions  END*/
 175
 176 static void input_set_info(char* title,int length, int rate, int freq, int nch)
 177 {
 178     xmms_length=length;
 179 }
 180
 181 static void init_plugins_from_dir(const char *plugin_dir){
 182     DIR *dir;
 183     struct dirent *ent;
 184
 185     dir = opendir(plugin_dir);
 186     if (!dir) return;
 187
 188     while ((ent = readdir(dir)) != NULL){
 189         char filename[strlen(plugin_dir)+strlen(ent->d_name)+4];
 190         void* handle;
 191         sprintf(filename, "%s/%s", plugin_dir, ent->d_name);
 192         handle=dlopen(filename, RTLD_NOW);
 193         if(handle){
 194             void *(*gpi) (void);
 195             gpi=dlsym(handle, "get_iplugin_info");
 196             if(gpi){
 197                 InputPlugin *p=gpi();
 198                 mp_msg(MSGT_DEMUX, MSGL_INFO, MSGTR_MPDEMUX_XMMS_FoundPlugin,
 199                                                 ent->d_name,p->description);
 200                 p->handle = handle;
 201                 p->filename = strdup(filename);
 202                 p->get_vis_type = input_get_vis_type;
 203                 p->add_vis_pcm = input_add_vis_pcm;
 204                 p->set_info = input_set_info;
 205                 p->set_info_text = input_set_info_text;
 206                 if(p->init) p->init();
 207                 input_plugins[no_plugins++]=p;
 208             } else
 209                 dlclose(handle);
 210         }
 211     }
 212     closedir(dir);
 213 }
 214
 215 static void init_plugins(void) {
 216     char *home;
 217
 218     no_plugins=0;
 219
 220     home = getenv("HOME");
 221     if(home != NULL) {
 222         char xmms_home[strlen(home) + 15];
 223         sprintf(xmms_home, "%s/.xmms/Plugins", home);
 224         init_plugins_from_dir(xmms_home);
 225     }
 226
 227     init_plugins_from_dir(XMMS_INPUT_PLUGIN_DIR);
 228 }
 229
 230 static void cleanup_plugins(void) {
 231     while(no_plugins>0){
 232         --no_plugins;
 233         mp_msg(MSGT_DEMUX, MSGL_INFO, MSGTR_MPDEMUX_XMMS_ClosingPlugin,
 234                                         input_plugins[no_plugins]->filename);
 235         if(input_plugins[no_plugins]->cleanup)
 236             input_plugins[no_plugins]->cleanup();
 237         dlclose(input_plugins[no_plugins]->handle);
 238     }
 239 }
 240
 241 // ============================ mplayer demuxer stuff ===============
 242
 243 static int demux_xmms_open(demuxer_t* demuxer) {
 244     InputPlugin* ip = NULL;
 245     sh_audio_t* sh_audio;
 246     WAVEFORMATEX* w;
 247     xmms_priv_t *priv;
 248     int i;
 249
 250     if (xmms_priv) return 0; // as I said, it's not reentrant :)
 251     init_plugins();
 252     for(i=0;i<no_plugins;i++){
 253         if (input_plugins[i]->is_our_file(demuxer->stream->url)){
 254             ip=input_plugins[i]; break;
 255         }
 256     }
 257     if(!ip) return 0; // no plugin to handle this...
 258
 259     pthread_mutex_init(&xmms_mutex,NULL);
 260
 261     xmms_priv=priv=malloc(sizeof(xmms_priv_t));
 262     memset(priv,0,sizeof(xmms_priv_t));
 263     priv->ip=ip;
 264
 265     memset(xmms_audiobuffer,0,XMMS_PACKETSIZE);
 266
 267     xmms_channels=0;
 268     sh_audio = new_sh_audio(demuxer,0);
 269     sh_audio->wf = w = malloc(sizeof(WAVEFORMATEX));
 270     w->wFormatTag = sh_audio->format = format;
 271
 272     demuxer->movi_start = 0;
 273     demuxer->movi_end = 100;
 274     demuxer->audio->id = 0;
 275     demuxer->audio->sh = sh_audio;
 276     demuxer->priv=priv;
 277     sh_audio->ds = demuxer->audio;
 278
 279     xmms_output_plugin.init();
 280     ip->output = &xmms_output_plugin;
 281     xmms_playing=1;
 282     ip->play_file(demuxer->stream->url);
 283     if (ip->get_song_info)
 284         ip->get_song_info(demuxer->stream->url,&xmms_title,&xmms_length);
 285     if (xmms_length<=0) demuxer->seekable=0;
 286
 287     mp_msg(MSGT_DEMUX,MSGL_INFO,MSGTR_MPDEMUX_XMMS_WaitForStart,
 288                                                         demuxer->stream->url);
 289     while (xmms_channels==0) {
 290         usleep(10000);
 291         if(ip->get_time()<0) return 0;
 292     }
 293     sh_audio->sample_format= xmms_afmt;
 294     switch (xmms_afmt) {
 295         case AF_FORMAT_S16_LE:
 296         case AF_FORMAT_S16_BE:
 297         case AF_FORMAT_U16_LE:
 298         case AF_FORMAT_U16_BE:
 299             sh_audio->samplesize = 2;
 300             break;
 301         default:
 302             sh_audio->samplesize = 1;
 303     }
 304     w->wBitsPerSample = sh_audio->samplesize*8;
 305     w->nChannels = sh_audio->channels = xmms_channels;
 306     w->nSamplesPerSec = sh_audio->samplerate = xmms_samplerate;
 307     xmms_byterate = w->nAvgBytesPerSec =
 308                     xmms_samplerate*sh_audio->channels*sh_audio->samplesize;
 309     w->nBlockAlign = sh_audio->samplesize*sh_audio->channels;
 310     w->cbSize = 0;
 311
 312     return DEMUXER_TYPE_XMMS;
 313 }
 314
 315 static int demux_xmms_fill_buffer(demuxer_t* demuxer, demux_stream_t *ds) {
 316     sh_audio_t *sh_audio = demuxer->audio->sh;
 317     xmms_priv_t *priv=demuxer->priv;
 318     demux_packet_t*  dp;
 319
 320     if (xmms_length<=0) demuxer->seekable=0;
 321     else demuxer->seekable=1;
 322
 323     while (xmms_audiopos<XMMS_PACKETSIZE/2) {
 324         if((priv->ip->get_time()<0) || !xmms_playing)
 325             return 0;
 326         usleep(1000);
 327     }
 328
 329     pthread_mutex_lock(&xmms_mutex);
 330     dp = new_demux_packet(XMMS_PACKETSIZE/2);
 331     dp->pts = priv->spos / sh_audio->wf->nAvgBytesPerSec;
 332     ds->pos = priv->spos;
 333
 334     memcpy(dp->buffer,xmms_audiobuffer,XMMS_PACKETSIZE/2);
 335     memcpy(xmms_audiobuffer,&xmms_audiobuffer[XMMS_PACKETSIZE/2],
 336                                             xmms_audiopos-XMMS_PACKETSIZE/2);
 337     xmms_audiopos-=XMMS_PACKETSIZE/2;
 338     pthread_mutex_unlock(&xmms_mutex);
 339
 340     ds_add_packet(ds,dp);
 341
 342     return 1;
 343 }
 344
 345 static void demux_xmms_seek(demuxer_t *demuxer,float rel_seek_secs,
 346                                                float audio_delay,int flags){
 347     stream_t* s = demuxer->stream;
 348     sh_audio_t* sh_audio = demuxer->audio->sh;
 349     xmms_priv_t *priv=demuxer->priv;
 350     int32_t pos;
 351
 352     if(priv->ip->get_time()<0) return;
 353
 354     pos = (flags & SEEK_ABSOLUTE) ? 0 : priv->spos / sh_audio->wf->nAvgBytesPerSec;
 355     if (flags & SEEK_FACTOR)
 356         pos+= rel_seek_secs*xmms_length;
 357     else
 358         pos+= rel_seek_secs;
 359
 360     if (pos<0) pos=0;
 361     if (pos>=xmms_length) pos=xmms_length-1;
 362
 363     priv->ip->seek((pos<0)?0:pos);
 364     priv->spos=pos * sh_audio->wf->nAvgBytesPerSec;
 365 }
 366
 367 static void demux_close_xmms(demuxer_t* demuxer) {
 368     xmms_priv_t *priv=demuxer->priv;
 369     xmms_playing=0;
 370     xmms_audiopos=0; // xmp on exit waits until buffer is free enough
 371     if (priv != NULL) {
 372         if (priv->ip != NULL)
 373             priv->ip->stop();
 374         free(priv); xmms_priv=demuxer->priv=NULL;
 375     }
 376     cleanup_plugins();
 377 }
 378
 379 static int demux_xmms_control(demuxer_t *demuxer,int cmd, void *arg){
 380     demux_stream_t *d_video=demuxer->video;
 381     sh_audio_t *sh_audio=demuxer->audio->sh;
 382     xmms_priv_t *priv=demuxer->priv;
 383
 384     switch(cmd) {
 385         case DEMUXER_CTRL_GET_TIME_LENGTH:
 386             if (xmms_length<=0) return DEMUXER_CTRL_DONTKNOW;
 387             *((double *)arg)=(double)xmms_length/1000;
 388             return DEMUXER_CTRL_GUESS;
 389
 390         case DEMUXER_CTRL_GET_PERCENT_POS:
 391             if (xmms_length<=0)
 392                 return DEMUXER_CTRL_DONTKNOW;
 393             *((int *)arg)=(int)( priv->spos /
 394                         (float)(sh_audio->wf->nAvgBytesPerSec) / xmms_length );
 395             return DEMUXER_CTRL_OK;
 396
 397         default:
 398             return DEMUXER_CTRL_NOTIMPL;
 399     }
 400 }
 401
 402
 403 const demuxer_desc_t demuxer_desc_xmms = {
 404     "XMMS demuxer",
 405     "xmms",
 406     "XMMS",
 407     "Balatoni Denes, A'rpi",
 408     "requires XMMS plugins",
 409     DEMUXER_TYPE_XMMS,
 410     0, // safe autodetect
 411     demux_xmms_open,
 412     demux_xmms_fill_buffer,
 413     NULL,
 414     demux_close_xmms,
 415     demux_xmms_seek,
 416     demux_xmms_control
 417 };