vorbis driver ported, and also fixed a bug, as nominal_bitrate can be -1

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@5428 b3059339-0415-0410-9bf9-f77b7e298cf2

libmpcodecs/Makefile

@@ -3,7 +3,7 @@ include ../config.mak
 
 LIBNAME = libmpcodecs.a
 
-AUDIO_SRCS=dec_audio.c ad.c ad_a52.c ad_acm.c ad_alaw.c ad_dk3adpcm.c ad_dshow.c ad_dvdpcm.c ad_ffmpeg.c ad_hwac3.c ad_imaadpcm.c ad_mp3.c ad_msadpcm.c ad_pcm.c ad_roqaudio.c ad_msgsm.c ad_faad.c
+AUDIO_SRCS=dec_audio.c ad.c ad_a52.c ad_acm.c ad_alaw.c ad_dk3adpcm.c ad_dshow.c ad_dvdpcm.c ad_ffmpeg.c ad_hwac3.c ad_imaadpcm.c ad_mp3.c ad_msadpcm.c ad_pcm.c ad_roqaudio.c ad_msgsm.c ad_faad.c ad_vorbis.c
 VIDEO_SRCS=dec_video.c vd.c vd_null.c vd_cinepak.c vd_qtrpza.c vd_ffmpeg.c vd_dshow.c vd_vfw.c vd_odivx.c vd_divx4.c vd_raw.c vd_xanim.c vd_msvidc.c vd_fli.c vd_qtrle.c vd_qtsmc.c vd_roqvideo.c vd_cyuv.c vd_nuv.c vd_libmpeg2.c vd_msrle.c vd_huffyuv.c vd_zlib.c
 
 ifeq ($(PNG),yes)

libmpcodecs/ad_vorbis.c

@@ -0,0 +1,184 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "config.h"
+#include "ad_internal.h"
+
+#ifdef HAVE_OGGVORBIS
+
+static ad_info_t info = 
+{
+	"Ogg/Vorbis audio decoder",
+	"libvorbis",
+	AFM_VORBIS,
+	"Felix Buenemann, A'rpi",
+	"libvorbis",
+	"buggy"
+};
+
+LIBAD_EXTERN(vorbis)
+
+#include <math.h>
+#include <vorbis/codec.h>
+
+// This struct is also defined in demux_ogg.c => common header ?
+typedef struct ov_struct_st {
+  vorbis_info      vi; /* struct that stores all the static vorbis bitstream
+			  settings */
+  vorbis_comment   vc; /* struct that stores all the bitstream user comments */
+  vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */
+  vorbis_block     vb; /* local working space for packet->PCM decode */
+} ov_struct_t;
+
+static int preinit(sh_audio_t *sh)
+{
+  sh->audio_out_minsize=1024*4; // 1024 samples/frame
+  return 1;
+}
+
+static int init(sh_audio_t *sh)
+{
+  ogg_packet op;
+  vorbis_comment vc;
+  struct ov_struct_st *ov;
+
+  /// Init the decoder with the 3 header packets
+  ov = (struct ov_struct_st*)malloc(sizeof(struct ov_struct_st));
+  vorbis_info_init(&ov->vi);
+  vorbis_comment_init(&vc);
+  op.bytes = ds_get_packet(sh->ds,&op.packet);
+  op.b_o_s  = 1;
+  /// Header
+  if(vorbis_synthesis_headerin(&ov->vi,&vc,&op) <0) {
+    mp_msg(MSGT_DECAUDIO,MSGL_ERR,"OggVorbis: initial (identification) header broken!\n");
+    free(ov);
+    return 0;
+  }
+  op.bytes = ds_get_packet(sh->ds,&op.packet);
+  op.b_o_s  = 0;
+  /// Comments
+  if(vorbis_synthesis_headerin(&ov->vi,&vc,&op) <0) {
+    mp_msg(MSGT_DECAUDIO,MSGL_ERR,"OggVorbis: comment header broken!\n");
+    free(ov);
+    return 0;
+  }
+  op.bytes = ds_get_packet(sh->ds,&op.packet);
+  //// Codebook
+  if(vorbis_synthesis_headerin(&ov->vi,&vc,&op)<0) {
+    mp_msg(MSGT_DECAUDIO,MSGL_WARN,"OggVorbis: codebook header broken!\n");
+    free(ov);
+    return 0;
+  } else { /// Print the infos
+    char **ptr=vc.user_comments;
+    while(*ptr){
+      mp_msg(MSGT_DECAUDIO,MSGL_V,"OggVorbisComment: %s\n",*ptr);
+      ++ptr;
+    }
+    mp_msg(MSGT_DECAUDIO,MSGL_V,"OggVorbis: Bitstream is %d channel, %dHz, %dbit/s %cBR\n",(int)ov->vi.channels,(int)ov->vi.rate,(int)ov->vi.bitrate_nominal,
+	(ov->vi.bitrate_lower!=ov->vi.bitrate_nominal)||(ov->vi.bitrate_upper!=ov->vi.bitrate_nominal)?'V':'C');
+    mp_msg(MSGT_DECAUDIO,MSGL_V,"OggVorbis: Encoded by: %s\n",vc.vendor);
+  }
+
+//  printf("lower=%d  upper=%d  \n",(int)ov->vi.bitrate_lower,(int)ov->vi.bitrate_upper);
+
+  // Setup the decoder
+  sh->channels=ov->vi.channels; 
+  sh->samplerate=ov->vi.rate;
+  // assume 128kbit if bitrate not specified in the header
+  sh->i_bps=((ov->vi.bitrate_nominal>0) ? ov->vi.bitrate_nominal : 128000)/8;
+  sh->context = ov;
+
+  /// Finish the decoder init
+  vorbis_synthesis_init(&ov->vd,&ov->vi);
+  vorbis_block_init(&ov->vd,&ov->vb);
+  mp_msg(MSGT_DECAUDIO,MSGL_V,"OggVorbis: Init OK!\n");
+
+  return 1;
+}
+
+static void uninit(sh_audio_t *sh)
+{
+}
+
+static int control(sh_audio_t *sh,int cmd,void* arg, ...)
+{
+    switch(cmd)
+    {
+#if 0      
+      case ADCTRL_RESYNC_STREAM:
+	  return CONTROL_TRUE;
+      case ADCTRL_SKIP_FRAME:
+	  return CONTROL_TRUE;
+#endif
+    }
+  return CONTROL_UNKNOWN;
+}
+
+static int decode_audio(sh_audio_t *sh,unsigned char *buf,int minlen,int maxlen)
+{
+        int len = 0;
+        int samples;
+        float **pcm;
+        ogg_packet op;
+        char* np;
+        struct ov_struct_st *ov = sh->context;
+        op.b_o_s =  op.e_o_s = 0;
+	while(len < minlen) {
+	  op.bytes = ds_get_packet(sh->ds,&op.packet);
+	  if(!op.packet)
+	    break;
+	  if(vorbis_synthesis(&ov->vb,&op)==0) /* test for success! */
+	    vorbis_synthesis_blockin(&ov->vd,&ov->vb);
+	  while((samples=vorbis_synthesis_pcmout(&ov->vd,&pcm))>0){
+	    int i,j;
+	    int clipflag=0;
+	    int convsize=(maxlen-len)/(2*ov->vi.channels); // max size!
+	    int bout=(samples<convsize?samples:convsize);
+	  
+	    if(bout<=0) break;
+
+	    /* convert floats to 16 bit signed ints (host order) and
+	       interleave */
+	    for(i=0;i<ov->vi.channels;i++){
+	      ogg_int16_t *convbuffer=(ogg_int16_t *)(&buf[len]);
+	      ogg_int16_t *ptr=convbuffer+i;
+	      float  *mono=pcm[i];
+	      for(j=0;j<bout;j++){
+#if 1
+		int val=mono[j]*32767.f;
+#else /* optional dither */
+		int val=mono[j]*32767.f+drand48()-0.5f;
+#endif
+		/* might as well guard against clipping */
+		if(val>32767){
+		  val=32767;
+		  clipflag=1;
+		}
+		if(val<-32768){
+		  val=-32768;
+		  clipflag=1;
+		}
+		*ptr=val;
+		ptr+=ov->vi.channels;
+	      }
+	    }
+		
+	    if(clipflag)
+	      mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"Clipping in frame %ld\n",(long)(ov->vd.sequence));
+	    len+=2*ov->vi.channels*bout;
+	    mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"\n[decoded: %d / %d ]\n",bout,samples);
+	    vorbis_synthesis_read(&ov->vd,bout); /* tell libvorbis how
+						    many samples we
+						    actually consumed */
+	  }
+	}
+
+
+
+  return len;
+}
+
+#endif /* !HAVE_OGGVORBIS */
+