From 000819f4fe7c02c7878d0e04e7cdf81b09d040fb Mon Sep 17 00:00:00 2001
From: atmos4 <atmos4@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Fri, 26 Jul 2002 00:02:31 +0000
Subject: Improved ao_arts delay and buff er handling, patch by Szombathelyi
 Gy|rgy <gyurco@freemail.hu>

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@6808 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 libao2/ao_arts.c | 39 ++++++++++++++++++++-------------------
 1 file changed, 20 insertions(+), 19 deletions(-)

diff --git a/libao2/ao_arts.c b/libao2/ao_arts.c
index 6fa6b88cf0..d660ebbcf3 100644
--- a/libao2/ao_arts.c
+++ b/libao2/ao_arts.c
@@ -18,6 +18,10 @@
 
 #define OBTAIN_BITRATE(a) (((a != AFMT_U8) || (a != AFMT_S8)) ? 16 : 8)
 
+/* Feel free to experiment with the following values: */
+#define ARTS_PACKETS 10 /* Number of audio packets */
+#define ARTS_PACKET_SIZE_LOG2 11 /* Log2 of audio packet size */
+
 static arts_stream_t stream;
 
 static ao_info_t info =
@@ -44,34 +48,36 @@ static int init(int rate_hz, int channels, int format, int flags)
 		mp_msg(MSGT_AO, MSGL_ERR, "AO: [arts] %s\n", arts_error_text(err));
 		return 0;
 	}
-
-	else
-		mp_msg(MSGT_AO, MSGL_INFO, "AO: [arts] Connected to sound server\n");
+	mp_msg(MSGT_AO, MSGL_INFO, "AO: [arts] Connected to sound server\n");
 
 	ao_data.format = format;
 	ao_data.channels = channels;
 	ao_data.samplerate = rate_hz;
 	ao_data.bps = (rate_hz*channels);
-	ao_data.buffersize = 4096;
 
 	if(format != AFMT_U8 && format != AFMT_S8)
 		ao_data.bps*=2;
 
-	for (frag_spec = 0; (0x01<<frag_spec) < ao_data.buffersize; ++frag_spec)
-		;
-	frag_spec |= 0x00020000;
 	stream=arts_play_stream(rate_hz, OBTAIN_BITRATE(format), channels, "Mplayer");
-	arts_stream_set(stream, ARTS_P_PACKET_SETTINGS, frag_spec);
-	arts_stream_set(stream, ARTS_P_BLOCKING, 0);
 
 	if(stream == NULL) {
 		mp_msg(MSGT_AO, MSGL_ERR, "AO: [arts] Unable to open a stream\n");
+		arts_free();
 		return 0;
 	}
 
-	else
-		mp_msg(MSGT_AO, MSGL_INFO, "AO: [arts] Stream opened\n");
+	/* Set the stream to blocking: it will not block anyway, but it seems */
+	/* to be working better */
+	arts_stream_set(stream, ARTS_P_BLOCKING, 1);
+	frag_spec = ARTS_PACKET_SIZE_LOG2 | ARTS_PACKETS << 16;
+	arts_stream_set(stream, ARTS_P_PACKET_SETTINGS, frag_spec);
+	ao_data.buffersize = arts_stream_get(stream, ARTS_P_BUFFER_SIZE);
+	mp_msg(MSGT_AO, MSGL_INFO, "AO: [arts] Stream opened\n");
 
+	mp_msg(MSGT_AO, MSGL_INFO,"AO: [arts] buffer size: %d\n",
+	    ao_data.buffersize);
+	mp_msg(MSGT_AO, MSGL_INFO,"AO: [arts] packet size: %d\n",
+	    arts_stream_get(stream, ARTS_P_PACKET_SIZE));
 
 	return 1;
 }
@@ -84,7 +90,7 @@ static void uninit()
 
 static int play(void* data,int len,int flags)
 {
-	arts_write(stream, data, len);
+	return arts_write(stream, data, len);
 }
 
 static void audio_pause()
@@ -106,12 +112,7 @@ static int get_space()
 
 static float get_delay()
 {
-	return ((float) arts_stream_get(stream, ARTS_P_BUFFER_SIZE) / (float) ao_data.bps);
+	return ((float) (ao_data.buffersize - arts_stream_get(stream,
+		ARTS_P_BUFFER_SPACE))) / ((float) ao_data.bps);
 }
 
-
-
-
-
-
-
-- 
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