1 files changed, 73 insertions, 0 deletions
diff --git a/libmpcodecs/ad_alaw.c b/libmpcodecs/ad_alaw.c
new file mode 100644
index 0000000000..d1a7e4cfe4
--- /dev/null
+++ b/libmpcodecs/ad_alaw.c
@@ -0,0 +1,73 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "config.h"
+#include "ad_internal.h"
+
+static ad_info_t info = 
+{
+	"aLaw/uLaw audio decoder",
+	"alaw",
+	AFM_ALAW,
+	"Nick Kurshev",
+	"A'rpi",
+	""
+};
+
+LIBAD_EXTERN(alaw)
+
+#include "alaw.h"
+
+static int init(sh_audio_t *sh_audio)
+{
+  /* aLaw audio codec:*/
+  if(!sh_audio->wf) return 0;
+  sh_audio->channels=sh_audio->wf->nChannels;
+  sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
+  sh_audio->i_bps=sh_audio->channels*sh_audio->samplerate;
+  return 1;
+}
+
+static int preinit(sh_audio_t *sh)
+{
+  sh->audio_out_minsize=2048;
+  return 1;
+}
+
+static void uninit(sh_audio_t *sh)
+{
+}
+
+static int control(sh_audio_t *sh,int cmd,void* arg, ...)
+{
+  int skip;
+    switch(cmd)
+    {
+      case ADCTRL_SKIP_FRAME:
+	skip=sh->i_bps/16;
+	skip=skip&(~3);
+	demux_read_data(sh->ds,NULL,skip);
+	return CONTROL_TRUE;
+      default:
+	return CONTROL_UNKNOWN;
+    }
+  return CONTROL_UNKNOWN;
+}
+
+static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
+{
+ int len;
+ int l=demux_read_data(sh_audio->ds,buf,minlen/2);
+ unsigned short *d=(unsigned short *) buf;
+ unsigned char *s=buf;
+ len=2*l;
+ if(sh_audio->format==6){
+ /* aLaw */
+   while(l>0){ --l; d[l]=alaw2short[s[l]]; }
+ } else {
+ /* uLaw */
+    while(l>0){ --l; d[l]=ulaw2short[s[l]]; }
+ }
+ return len;
+}