initial ogg/vorbis support added

CVS patchset: 755
CVS date: 2001/10/07 03:53:10

1 files changed, 248 insertions, 0 deletions

diff --git a/src/libvorbis/xine_decoder.c b/src/libvorbis/xine_decoder.c
new file mode 100644
index 000000000..53d90c55c
--- /dev/null
+++ b/src/libvorbis/xine_decoder.c
@@ -0,0 +1,248 @@
+/* 
+ * Copyright (C) 2000-2001 the xine project
+ * 
+ * This file is part of xine, a unix video player.
+ * 
+ * xine 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.
+ * 
+ * xine 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
+ *
+ * $Id: xine_decoder.c,v 1.1 2001/10/07 03:53:11 heikos Exp $
+ *
+ * (ogg/)vorbis audio decoder plugin (libvorbis wrapper) for xine
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "audio_out.h"
+#include "buffer.h"
+#include "xine_internal.h"
+
+#include <ogg/ogg.h>
+#include <vorbis/codec.h>
+
+#define MAX_NUM_SAMPLES 4096
+
+typedef struct vorbis_decoder_s {
+  audio_decoder_t   audio_decoder;
+
+  uint32_t          pts;
+
+  ao_instance_t    *audio_out;
+  int               output_sampling_rate;
+  int               output_open;
+  int               output_mode;
+
+  /* vorbis stuff */
+  vorbis_info       vi; 
+  vorbis_comment    vc;
+  vorbis_dsp_state  vd;
+  vorbis_block      vb;
+
+  int16_t           convbuffer[MAX_NUM_SAMPLES];
+  int               convsize;
+
+  int               header_count;
+
+} vorbis_decoder_t;
+
+static int vorbis_can_handle (audio_decoder_t *this_gen, int buf_type) {
+  return ((buf_type & 0xFFFF0000) == BUF_AUDIO_VORBIS) ;
+}
+
+
+static void vorbis_init (audio_decoder_t *this_gen, ao_instance_t *audio_out) {
+
+  vorbis_decoder_t *this = (vorbis_decoder_t *) this_gen;
+
+  this->audio_out       = audio_out;
+  this->output_open     = 0;
+  this->header_count    = 3;
+  this->convsize        = 0;
+
+  vorbis_info_init(&this->vi);
+  vorbis_comment_init(&this->vc);
+
+
+  printf ("libvorbis: init\n"); 
+
+}
+
+static void vorbis_decode_data (audio_decoder_t *this_gen, buf_element_t *buf) {
+
+  vorbis_decoder_t *this = (vorbis_decoder_t *) this_gen;
+  ogg_packet *op = (ogg_packet *) buf->content;
+
+  /*
+  printf ("vorbisdecoder: before buf=%08x content=%08x op=%08x packet=%08x\n",
+	  buf, buf->content, op, op->packet);
+  */
+
+  /* if (buf->decoder_info[0] >0) { */
+
+
+  if (this->header_count) {
+
+    if(vorbis_synthesis_headerin(&this->vi,&this->vc,op)<0){ 
+      /* error case; not a vorbis header */
+      printf("libvorbis: this bitstream does not contain Vorbis "
+	      "audio data.\n");
+      /* FIXME: handle error */
+    }
+
+    this->header_count--;
+
+    if (!this->header_count) {
+      
+      int mode = AO_CAP_MODE_MONO;
+
+      {
+	char **ptr=this->vc.user_comments;
+	while(*ptr){
+	  printf("libvorbis: %s\n",*ptr);
+	  ++ptr;
+	}
+	printf ("\nlibvorbis: bitstream is %d channel, %ldHz\n",
+		this->vi.channels, this->vi.rate);
+	printf("libvorbis: encoded by: %s\n\n",this->vc.vendor);
+      }
+
+      switch (this->vi.channels) {
+      case 1: 
+	mode = AO_CAP_MODE_MONO;
+	break;
+      case 2: 
+	mode = AO_CAP_MODE_STEREO;
+	break;
+      case 4: 
+	mode = AO_CAP_MODE_4CHANNEL;
+	break;
+      case 5: 
+	mode = AO_CAP_MODE_5CHANNEL;
+	break;
+      case 6: 
+	mode = AO_CAP_MODE_5_1CHANNEL;
+	break;
+      default:
+	printf ("libvorbis: help, %d channels ?!\n",
+		this->vi.channels);
+	/* FIXME: handle error */
+      }
+
+      this->convsize=MAX_NUM_SAMPLES/this->vi.channels;
+
+      if (!this->output_open) {
+	this->output_open = this->audio_out->open(this->audio_out, 
+						  16,
+						  this->vi.rate,
+						  mode) ;
+      }
+
+      vorbis_synthesis_init(&this->vd,&this->vi); 
+      vorbis_block_init(&this->vd,&this->vb);     
+
+    }
+  } else if (this->output_open) {
+
+    float **pcm;
+    int samples;
+
+
+    if(vorbis_synthesis(&this->vb,op)==0) 
+      vorbis_synthesis_blockin(&this->vd,&this->vb);
+
+    while ((samples=vorbis_synthesis_pcmout(&this->vd,&pcm))>0){
+
+      int i,j;
+      int clipflag=0;
+      int bout=(samples<this->convsize?samples:this->convsize);
+      
+      /* convert floats to 16 bit signed ints (host order) and
+	 interleave */
+      for(i=0;i<this->vi.channels;i++){
+	ogg_int16_t *ptr=this->convbuffer+i;
+	float  *mono=pcm[i];
+	for(j=0;j<bout;j++){
+	  int val=mono[j]*32767.f;
+	  /* might as well guard against clipping */
+	  if(val>32767){
+	    val=32767;
+	    clipflag=1;
+	  }
+	  if(val<-32768){
+	    val=-32768;
+	    clipflag=1;
+	  }
+	  *ptr=val;
+	  ptr+=this->vi.channels;
+	}
+      }
+
+      this->audio_out->write (this->audio_out,
+			      this->convbuffer,
+			      bout,
+			      buf->PTS);
+      buf->PTS=0;
+      vorbis_synthesis_read(&this->vd,bout);
+    }
+  }
+}
+
+static void vorbis_close (audio_decoder_t *this_gen) {
+
+  vorbis_decoder_t *this = (vorbis_decoder_t *) this_gen; 
+
+  vorbis_block_clear(&this->vb);
+  vorbis_dsp_clear(&this->vd);
+  vorbis_comment_clear(&this->vc);
+  vorbis_info_clear(&this->vi);  /* must be called last */
+
+  if (this->output_open) 
+    this->audio_out->close (this->audio_out);
+}
+
+static char *vorbis_get_id(void) {
+  return "vorbis";
+}
+
+audio_decoder_t *init_audio_decoder_plugin (int iface_version, config_values_t *cfg) {
+
+  vorbis_decoder_t *this ;
+
+  if (iface_version != 2) {
+    printf( "libvorbis: plugin doesn't support plugin API version %d.\n"
+	    "libvorbis: this means there's a version mismatch between xine and this "
+	    "libvorbis: decoder plugin.\nInstalling current plugins should help.\n",
+	    iface_version);
+
+    return NULL;
+  }
+
+  this = (vorbis_decoder_t *) malloc (sizeof (vorbis_decoder_t));
+
+  this->audio_decoder.interface_version   = 2;
+  this->audio_decoder.can_handle          = vorbis_can_handle;
+  this->audio_decoder.init                = vorbis_init;
+  this->audio_decoder.decode_data         = vorbis_decode_data;
+  this->audio_decoder.close               = vorbis_close;
+  this->audio_decoder.get_identifier      = vorbis_get_id;
+  this->audio_decoder.priority            = 5;
+  
+  return (audio_decoder_t *) this;
+}
+