RealAudio 1.0 (14_4) and 2.0 (28_8) native decoders.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@10262 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 147 insertions, 0 deletions

diff --git a/libmpcodecs/ad_ra1428.c b/libmpcodecs/ad_ra1428.c
new file mode 100644
index 0000000000..2c4fdff74a
--- /dev/null
+++ b/libmpcodecs/ad_ra1428.c
@@ -0,0 +1,147 @@
+// SAMPLE audio decoder - you can use this file as template when creating new codec!
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "config.h"
+#include "ad_internal.h"
+
+static ad_info_t info =  {
+	"RealAudio 1.0 and 2.0 native decoder",
+	"ra1428",
+	"Roberto Togni",
+	"http://www.honeypot.net/audio",
+	"Decoders taken from a public domain Amiga player"
+};
+
+LIBAD_EXTERN(ra1428)
+
+#include "native/common1428.h"
+
+
+
+static int preinit(sh_audio_t *sh) {
+  sh->samplerate=sh->wf->nSamplesPerSec;
+  sh->samplesize=sh->wf->wBitsPerSample/8;
+  sh->channels=sh->wf->nChannels;
+  sh->sample_format=AFMT_S16_LE;
+
+	switch (sh->format) {
+		case mmioFOURCC('1','4','_','4'):
+			mp_msg(MSGT_DECAUDIO,MSGL_INFO,"[ra1428] RealAudio 1.0 (14_4)\n");
+		  sh->i_bps=1800;
+		  break;
+		case mmioFOURCC('2','8','_','8'):
+			mp_msg(MSGT_DECAUDIO,MSGL_INFO,"[ra1428] RealAudio 2.0 (28_8)\n");
+	  	sh->i_bps=1200;
+	  	break;
+		default:
+			mp_msg(MSGT_DECAUDIO,MSGL_ERR,"[ra1428] Unhandled format in preinit: %x\n", sh->format);
+			return 0;
+	}
+  
+  sh->audio_out_minsize=128000; // no idea how to get... :(
+  sh->audio_in_minsize=((short*)(sh->wf+1))[1]*sh->wf->nBlockAlign;
+
+  return 1; // return values: 1=OK 0=ERROR
+}
+
+
+
+static int init(sh_audio_t *sh) {
+	switch (sh->format) {
+		case mmioFOURCC('1','4','_','4'):
+			(Real_144*)sh->context = init_144();
+		  break;
+		case mmioFOURCC('2','8','_','8'):
+			(Real_288*)sh->context = init_288();
+	  	break;
+		default:
+			mp_msg(MSGT_DECAUDIO,MSGL_ERR,"[ra1428] Unhandled format in init: %x\n", sh->format);
+			return 0;
+	}
+
+  return 1; // return values: 1=OK 0=ERROR
+}
+
+
+
+static void uninit(sh_audio_t *sh) {
+	switch (sh->format) {
+		case mmioFOURCC('1','4','_','4'):
+			free_144((Real_144*)sh->context);
+		  break;
+		case mmioFOURCC('2','8','_','8'):
+			free_288((Real_288*)sh->context);
+	  	break;
+		default:
+			mp_msg(MSGT_DECAUDIO,MSGL_ERR,"[ra1428] Unhandled format in uninit: %x\n", sh->format);
+			return;
+	}
+}
+
+
+
+static int decode_audio(sh_audio_t *sh,unsigned char *buf,int minlen,int maxlen) {
+  int w=sh->wf->nBlockAlign;
+  int h=((short*)(sh->wf+1))[1];
+  int cfs=((short*)(sh->wf+1))[3];
+	int i,j;
+
+  if(sh->a_in_buffer_len<=0){
+		switch (sh->format) {
+			case mmioFOURCC('1','4','_','4'):
+				demux_read_data(sh->ds, sh->a_in_buffer, sh->wf->nBlockAlign);
+				sh->a_in_buffer_size=
+				sh->a_in_buffer_len=sh->wf->nBlockAlign;
+		 	 break;
+			case mmioFOURCC('2','8','_','8'):
+				for (j = 0; j < h; j++)
+					for (i = 0; i < h/2; i++)
+						demux_read_data(sh->ds, sh->a_in_buffer+i*2*w+j*cfs, cfs);
+				sh->a_in_buffer_size=
+				sh->a_in_buffer_len=sh->wf->nBlockAlign*h;
+	 	 	break;
+			default:
+				mp_msg(MSGT_DECAUDIO,MSGL_ERR,"[ra1428] Unhandled format in decode_audio: %x\n", sh->format);
+				return 0;
+		}
+	}
+	
+	switch (sh->format) {
+		case mmioFOURCC('1','4','_','4'):
+			decode_144((Real_144*)sh->context,sh->a_in_buffer+sh->a_in_buffer_size-sh->a_in_buffer_len,(signed short*)buf);
+		  break;
+		case mmioFOURCC('2','8','_','8'):
+			decode_288((Real_288*)sh->context,sh->a_in_buffer+sh->a_in_buffer_size-sh->a_in_buffer_len,(signed short*)buf);
+	  	break;
+		default:
+			mp_msg(MSGT_DECAUDIO,MSGL_ERR,"[ra1428] Unhandled format in init: %x\n", sh->format);
+			return 0;
+	}
+
+  sh->a_in_buffer_len-=cfs;
+
+  return AUDIOBLOCK*2; // return value: number of _bytes_ written to output buffer,
+              // or -1 for EOF (or uncorrectable error)
+}
+
+static int control(sh_audio_t *sh,int cmd,void* arg, ...){
+    // various optional functions you MAY implement:
+    switch(cmd){
+      case ADCTRL_RESYNC_STREAM:
+        // it is called once after seeking, to resync.
+	// Note: sh_audio->a_in_buffer_len=0; is done _before_ this call!
+//	...
+	return CONTROL_TRUE;
+      case ADCTRL_SKIP_FRAME:
+        // it is called to skip (jump over) small amount (1/10 sec or 1 frame)
+	// of audio data - used to sync audio to video after seeking
+	// if you don't return CONTROL_TRUE, it will defaults to:
+	//      ds_fill_buffer(sh_audio->ds);  // skip 1 demux packet
+//	...
+	return CONTROL_TRUE;
+    }
+  return CONTROL_UNKNOWN;
+}