From b6a7934eb5ae4d2bbf435aca79a51ffa4b8ff6c3 Mon Sep 17 00:00:00 2001
From: albeu <albeu@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Mon, 13 May 2002 13:15:40 +0000
Subject: Initial support for dxr2. Based on patch from Tobias Diedrich
 <ranma@gmx.at>.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@6070 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 libao2/ao_dxr2.c | 143 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100644 libao2/ao_dxr2.c

(limited to 'libao2/ao_dxr2.c')

diff --git a/libao2/ao_dxr2.c b/libao2/ao_dxr2.c
new file mode 100644
index 0000000000..63ca4c28cb
--- /dev/null
+++ b/libao2/ao_dxr2.c
@@ -0,0 +1,143 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+#include <inttypes.h>
+
+#include "../config.h"
+#include "mp_msg.h"
+#include "bswap.h"
+
+#include "audio_out.h"
+#include "audio_out_internal.h"
+
+#include "afmt.h"
+
+
+static ao_info_t info =
+{
+	"DXR2 audio output",
+	"dxr2",
+	"Tobias Diedrich <ranma@gmx.at>",
+	""
+};
+
+LIBAO_EXTERN(dxr2)
+
+// to set/get/query special features/parameters
+static int control(int cmd,int arg){
+  return CONTROL_UNKNOWN;
+}
+
+static int freq=0;
+static int freq_id=0;
+
+// open & setup audio device
+// return: 1=success 0=fail
+static int init(int rate,int channels,int format,int flags){
+
+	ao_data.outburst=2048;
+	ao_data.samplerate=rate;
+	ao_data.channels=channels;
+	ao_data.buffersize=2048;
+	ao_data.bps=rate*4;
+	ao_data.format=format;
+	freq=rate;
+
+	switch(rate){
+	case 48000:
+		freq_id=0;
+		break;
+	case 96000:
+		freq_id=1;
+		break;
+	case 44100:
+		freq_id=2;
+		break;
+	case 32000:
+		freq_id=3;
+		break;
+	case 22050:
+		freq_id=4;
+		break;
+#if 0
+	case 24000:
+		freq_id=5;
+		break;
+	case 64000:
+		freq_id=6;
+		break;
+	case 88200:
+		freq_id=7;
+		break;
+#endif
+	default:
+		mp_msg(MSGT_AO,MSGL_ERR,"[AO] dxr2: %d Hz not supported, try \"-aop list=resample\"\n",rate);
+		return 0;
+	}
+
+	return 1;
+}
+
+// close audio device
+static void uninit(){
+
+}
+
+// stop playing and empty buffers (for seeking/pause)
+static void reset(){
+
+}
+
+// stop playing, keep buffers (for pause)
+static void audio_pause()
+{
+    // for now, just call reset();
+    reset();
+}
+
+// resume playing, after audio_pause()
+static void audio_resume()
+{
+}
+
+extern void dxr2_send_packet(unsigned char* data,int len,int id,int timestamp);
+extern void dxr2_send_lpcm_packet(unsigned char* data,int len,int id,int timestamp,int freq_id);
+extern int vo_pts;
+static int preload = 1;
+// return: how many bytes can be played without blocking
+static int get_space(){
+    float x=(float)(vo_pts-ao_data.pts)/90000.0;
+    int y;
+    if(x<=0) return 0;
+    y=freq*4*x;y/=ao_data.outburst;y*=ao_data.outburst;
+    if(y>32768) y=32768;
+    return y;
+}
+
+// plays 'len' bytes of 'data'
+// it should round it down to outburst*n
+// return: number of bytes played
+static int play(void* data,int len,int flags){
+  // MPEG and AC3 don't work :-(
+    if(ao_data.format==AFMT_MPEG)
+	dxr2_send_packet(data,len,0xC0,ao_data.pts);
+    else if(ao_data.format==AFMT_AC3)
+      	dxr2_send_packet(data,len,0x80,ao_data.pts);
+    else {
+	int i;
+	//unsigned short *s=data;
+	uint16_t *s=data;
+#ifndef WORDS_BIGENDIAN
+	for(i=0;i<len/2;i++) s[i] = bswap_16(s[i]); // (s[i]>>8)|(s[i]<<8); // le<->be bswap_16(s[i]);
+#endif
+	dxr2_send_lpcm_packet(data,len,0xA0,ao_data.pts-10000,freq_id);
+    }
+    return len;
+}
+
+// return: delay in seconds between first and last sample in buffer
+static float get_delay(){
+
+    return 0.0;
+}
+
-- 
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