imporetd from MPlayerXP, with small modification

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@5343 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 131 insertions, 0 deletions

diff --git a/libmpcodecs/dec_audio.c b/libmpcodecs/dec_audio.c
new file mode 100644
index 0000000000..835e5b870f
--- /dev/null
+++ b/libmpcodecs/dec_audio.c
@@ -0,0 +1,131 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "config.h"
+#include "mp_msg.h"
+#include "help_mp.h"
+
+extern int verbose; // defined in mplayer.c
+
+#include "stream.h"
+#include "demuxer.h"
+
+#include "codec-cfg.h"
+#include "stheader.h"
+
+#include "dec_audio.h"
+#include "ad.h"
+#include "../libao2/afmt.h"
+
+#ifdef USE_FAKE_MONO
+int fakemono=0;
+#endif
+/* used for ac3surround decoder - set using -channels option */
+int audio_output_channels = 2;
+
+static ad_functions_t* mpadec;
+
+int init_audio(sh_audio_t *sh_audio)
+{
+  unsigned i;
+  for (i=0; mpcodecs_ad_drivers[i] != NULL; i++)
+    if(mpcodecs_ad_drivers[i]->info->id==sh_audio->codec->driver){
+	mpadec=mpcodecs_ad_drivers[i]; break;
+    }
+  if(!mpadec){
+      mp_msg(MSGT_DECAUDIO,MSGL_ERR,"Requested audio codec family [%s] (vfm=%d) not available (enable it at compile time!)\n",
+          sh_audio->codec->name, sh_audio->codec->driver);
+      return 0; // no such driver
+  }
+  
+  printf("Selecting Audio Decoder: [%s] %s\n",mpadec->info->short_name,mpadec->info->name);
+  
+  sh_audio->samplesize=2;
+#ifdef WORDS_BIGENDIAN
+  sh_audio->sample_format=AFMT_S16_BE;
+#else
+  sh_audio->sample_format=AFMT_S16_LE;
+#endif
+  sh_audio->samplerate=0;
+  sh_audio->o_bps=0;
+
+  sh_audio->a_buffer_size=0;
+  sh_audio->a_buffer=NULL;
+
+  sh_audio->a_in_buffer_len=0;
+
+  /* setup required min. in/out buffer size:*/
+  sh_audio->audio_out_minsize=8192;/* default size, maybe not enough for Win32/ACM*/
+  
+  if(!mpadec->preinit(sh_audio))
+  {
+      printf("ADecoder preinit failed :(\n");
+      return 0;
+  }
+
+/* allocate audio out buffer: */
+  sh_audio->a_buffer_size=sh_audio->audio_out_minsize+MAX_OUTBURST; /* worst case calc.*/
+
+  mp_msg(MSGT_DECAUDIO,MSGL_V,"dec_audio: Allocating %d + %d = %d bytes for output buffer\n",
+      sh_audio->audio_out_minsize,MAX_OUTBURST,sh_audio->a_buffer_size);
+
+  sh_audio->a_buffer=malloc(sh_audio->a_buffer_size);
+  if(!sh_audio->a_buffer){
+      mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_CantAllocAudioBuf);
+      return 0;
+  }
+  memset(sh_audio->a_buffer,0,sh_audio->a_buffer_size);
+  sh_audio->a_buffer_len=0;
+
+  if(!mpadec->init(sh_audio)){
+      printf("ADecoder init failed :(\n");
+      return 0;
+  }
+  sh_audio->inited=1;
+  
+  if(!sh_audio->channels || !sh_audio->samplerate){
+    mp_msg(MSGT_DECAUDIO,MSGL_WARN,MSGTR_UnknownAudio);
+    if(sh_audio->a_buffer) free(sh_audio->a_buffer);
+    sh_audio->a_buffer=NULL;
+    return 0;
+  }
+
+  if(!sh_audio->o_bps)
+  sh_audio->o_bps=sh_audio->channels*sh_audio->samplerate*sh_audio->samplesize;
+  return sh_audio->codec->driver;
+}
+
+void uninit_audio(sh_audio_t *sh_audio)
+{
+    if(!sh_audio->inited) return;
+    mp_msg(MSGT_DECAUDIO,MSGL_V,"uninit audio: %d  \n",sh_audio->codec->driver);
+    mpadec->uninit(sh_audio);
+    if(sh_audio->a_buffer) free(sh_audio->a_buffer);
+    sh_audio->a_buffer=NULL;
+    sh_audio->inited=0;
+}
+
+int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
+{
+  if(sh_audio->inited) 
+    return mpadec->decode_audio(sh_audio,buf,minlen,maxlen);
+  else
+    return -1;
+}
+
+void resync_audio_stream(sh_audio_t *sh_audio)
+{
+  if(!sh_audio->inited) return;
+  if(mpadec->control(sh_audio,ADCTRL_RESYNC_STREAM,NULL)==CONTROL_TRUE) return;
+  // default resync code:
+  sh_audio->a_in_buffer_len=0;        // clear audio input buffer
+}
+
+void skip_audio_frame(sh_audio_t *sh_audio)
+{
+  if(!sh_audio->inited) return;
+  if(mpadec->control(sh_audio,ADCTRL_SKIP_FRAME,NULL)==CONTROL_TRUE) return;
+  // default skip code:
+  ds_fill_buffer(sh_audio->ds);  // skip block
+}