commandline configuration of audio plugins now through struct, format conversion plugin added

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3195 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 195 insertions, 0 deletions

diff --git a/libao2/pl_format.c b/libao2/pl_format.c
new file mode 100644
index 0000000000..168cdeb0dd
--- /dev/null
+++ b/libao2/pl_format.c
@@ -0,0 +1,195 @@
+/* This is a null audio out plugin it doesnt't really do anything
+   useful but serves an example of how audio plugins work. It delays
+   the output signal by the nuber of samples set by aop_delay n
+   where n is the number of bytes.
+ */
+#define PLUGIN
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "audio_out.h"
+#include "audio_plugin.h"
+#include "audio_plugin_internal.h"
+#include "afmt.h"
+
+static ao_info_t info =
+{
+        "Sample format conversion audio plugin",
+        "format",
+        "Anders",
+        ""
+};
+
+LIBAO_PLUGIN_EXTERN(format)
+
+// local data
+typedef struct pl_format_s
+{
+  void*  data;       // local audio data block
+  int    len;        // local buffer length
+  int 	 in;  	     // Input fomat
+  int    out;        // Output fomat
+  double sz_mult;    // data size multiplier
+} pl_format_t;
+
+static pl_format_t pl_format={NULL,0,0,0,1};
+
+// Number of bits
+#define B08		0 
+#define B16  		1	
+#define B32  		2
+#define NBITS_MASK	3
+
+// Endianess
+#define BE 		(0<<3) // Big endian
+#define LE 		(1<<3) // Little endian
+#define END_MASK	(1<<3)
+
+// Signed
+#define US		(0<<4)
+#define SI		(1<<4)
+#define SIGN_MASK	(1<<4)
+
+// to set/get/query special features/parameters
+static int control(int cmd,int arg){
+  switch(cmd){
+  case AOCONTROL_PLUGIN_SET_LEN:
+    if(pl_format.data) 
+      uninit();
+    pl_format.len = ao_plugin_data.len;
+    pl_format.data=(void*)malloc(ao_plugin_data.len);
+    ao_plugin_data.len=(int)((double)ao_plugin_data.len*pl_format.sz_mult);
+    return CONTROL_OK;
+  }
+  return -1;
+}
+
+// open & setup audio device
+// return: 1=success 0=fail
+static int init(){
+  int i=0;
+  int sign=0;
+  int nbits=8;
+  int be_le=BE;
+
+  // Sheck input format
+  switch(ao_plugin_data.format){
+  case(AFMT_U8):
+    pl_format.in=LE|B08|US; break;
+  case(AFMT_S8):
+    pl_format.in=LE|B08|SI; break;
+  case(AFMT_S16_LE):
+    pl_format.in=LE|B16|US; break;
+  case(AFMT_S16_BE):
+    pl_format.in=BE|B16|SI; break;
+  case(AFMT_U16_LE):	
+    pl_format.in=LE|B16|US; break;
+  case(AFMT_U16_BE):	
+    pl_format.in=BE|B16|US; break;
+  case(AFMT_S32_LE):
+    pl_format.in=LE|B32|SI; break;
+  case(AFMT_S32_BE):	
+    pl_format.in=BE|B32|SI; break;
+  case(AFMT_IMA_ADPCM):		
+  case(AFMT_MU_LAW):
+  case(AFMT_A_LAW):
+  case(AFMT_MPEG):
+  case(AFMT_AC3):
+    printf("[pl_format] Audio format not yet suported \n");
+    return 0;
+  default: 
+    printf("[pl_format] Unsupported audio format\n"); // Should never happen...
+    return 0;
+  }
+  // Sheck output format
+  switch(ao_plugin_cfg.pl_format_type){
+  case(AFMT_U8):
+    pl_format.in=LE|B08|US; break;
+  case(AFMT_S8):
+    pl_format.in=LE|B08|SI; break;
+  case(AFMT_S16_LE):
+    pl_format.in=LE|B16|US; break;
+  case(AFMT_S16_BE):
+    pl_format.in=BE|B16|SI; break;
+  case(AFMT_U16_LE):	
+    pl_format.in=LE|B16|US; break;
+  case(AFMT_U16_BE):	
+    pl_format.in=BE|B16|US; break;
+  case(AFMT_S32_LE):
+    pl_format.in=LE|B32|SI; break;
+  case(AFMT_S32_BE):	
+    pl_format.in=BE|B32|SI; break;
+  case(AFMT_IMA_ADPCM):		
+  case(AFMT_MU_LAW):
+  case(AFMT_A_LAW):
+  case(AFMT_MPEG):
+  case(AFMT_AC3):
+    printf("[pl_format] Audio format not yet suported \n");
+    return 0;
+  default:
+    printf("[pl_format] Unsupported audio format\n"); // Should never happen...
+    return 0;
+  }
+  // We are changing the format
+  ao_plugin_data.format=ao_plugin_cfg.pl_format_type;
+  
+  // And perhaps the buffer size
+  pl_format.sz_mult=1;
+  if((pl_format.in&NBITS_MASK) < (pl_format.out&NBITS_MASK))
+    pl_format.sz_mult/=(double)(1<<(pl_format.out-pl_format.in));
+  if((pl_format.in&NBITS_MASK) > (pl_format.out&NBITS_MASK))
+    pl_format.sz_mult*=(double)(1<<(pl_format.out-pl_format.in));
+  ao_plugin_data.sz_mult*=pl_format.sz_mult;
+  return 1;
+}
+
+// close plugin
+static void uninit(){
+  if(pl_format.data) 
+    free(pl_format.data);
+}
+
+// empty buffers
+static void reset(){
+  int i = 0;
+  for(i=0;i<pl_format.len;i++)
+    ((char*)pl_format.data)[i]=0;
+}
+
+// processes 'ao_plugin_data.len' bytes of 'data'
+// called for every block of data
+static int play(){
+  register int i=0;
+  void* in_data=ao_plugin_data.data;
+  void* out_data=pl_format.data;
+  int in_len=((int)(double)pl_format.len*pl_format.sz_mult);
+  in_len>>=pl_format.in&NBITS_MASK;
+
+  if((pl_format.in&END_MASK)!=(pl_format.out&END_MASK)){
+    switch(pl_format.in&NBITS_MASK){
+    case(B16):{
+      register int16_t s;
+      for(i=1;i<in_len;i++){
+	s=((int16_t*)in_data)[i];
+	((int16_t*)in_data)[i]=(int16_t)(((s&0x00FF)<<8) | (s&0xFF00)>>8);
+      }
+      break;
+    }
+    case(B32):{
+      register int32_t s;
+      for(i=1;i<in_len;i++){
+	s=((int32_t*)in_data)[i];
+	((int32_t*)in_data)[i]=(int32_t)(((s&0x000000FF)<<24) | ((s&0x0000FF00)<<8) |
+	                                 ((s&0x00FF0000)>>8)  | ((s&0xFF000000)>>24));
+      }
+      break;
+    }
+    }
+  }
+  
+  return 1;
+}
+
+
+