From 52d4200cb1f841932dc097127258c522dd018a13 Mon Sep 17 00:00:00 2001
From: Warren Dukes <warren.dukes@gmail.com>
Date: Thu, 20 May 2004 04:00:17 +0000
Subject: fix some seeking stuff for mp3's

git-svn-id: https://svn.musicpd.org/mpd/trunk@1106 09075e82-0dd4-0310-85a5-a0d7c8717e4f
---
 TODO             |  8 +++-----
 src/mp3_decode.c | 32 +++++++++++++++++++-------------
 2 files changed, 22 insertions(+), 18 deletions(-)

diff --git a/TODO b/TODO
index d80ad91ae..e36397e79 100644
--- a/TODO
+++ b/TODO
@@ -2,8 +2,7 @@
 	a) make seekings non-blocking:
 		1) player:
 			a) first check that seekWhere isn't already buffered
-		2) check that stream is seekable before seeking forward!
-		3) deal with seeking forward better by calling seek function 
+		2) deal with seeking forward better by calling seek function 
 			(for mp3 and mp4)!
 	b) bufferInput in outputBuffer waiting!
 		1) implement some sort of callback mechanism for this
@@ -15,12 +14,11 @@
 		3) if not seekable, reset buffer, and elapsedTime when
 			unpaused
 	d) put some sort of error reporting for streaming/inputStream!
-	e) ogg streams
-	f) fetch metadata and store in DecoderControl and pass to 
+	e) fetch metadata and store in DecoderControl and pass to 
 		PlayerControl
 		1) eventually deal with icy-metadata
 		2) parse metadata on the fly in decoders
-	g) command for dealing with the changing metadata, currentsonginfo
+	f) command for dealing with the changing metadata, currentsonginfo
 		or something
 
 2) how to deal with streams and the db
diff --git a/src/mp3_decode.c b/src/mp3_decode.c
index 3836af8e2..c2dd1f8f4 100644
--- a/src/mp3_decode.c
+++ b/src/mp3_decode.c
@@ -55,6 +55,9 @@
 #define DECODE_CONT		-1
 #define DECODE_OK		0
 
+#define MUTEFRAME_SKIP          1
+#define MUTEFRAME_SEEK          2
+
 /* this is stolen from mpg321! */
 struct audio_dither {
 	mad_fixed_t error[3];
@@ -356,7 +359,7 @@ int decodeFirstFrame(mp3DecodeData * data, DecoderControl * dc) {
 		if(xing.flags & XING_FRAMES) {
 			mad_timer_t duration = data->frame.header.duration;
 			mad_timer_multiply(&duration,xing.frames);
-			data->muteFrame = 1;
+			data->muteFrame = MUTEFRAME_SKIP;
 			data->totalTime = ((float)mad_timer_count(duration,
 						MAD_UNITS_MILLISECONDS))/1000;
 			data->maxFrames = xing.frames;
@@ -429,10 +432,10 @@ int openMp3FromInputStream(InputStream * inStream, mp3DecodeData * data,
 }
 
 int mp3Read(mp3DecodeData * data, OutputBuffer * cb, DecoderControl * dc) {
-	static int i;
-	static int ret;
-	static struct audio_dither dither;
-	static int skip;
+	int i;
+	int ret;
+	struct audio_dither dither;
+	int skip;
 
 	if(data->currentFrame>=data->highestFrame) { 
 		mad_timer_add(&data->timer,(data->frame).header.duration);
@@ -457,18 +460,19 @@ int mp3Read(mp3DecodeData * data, OutputBuffer * cb, DecoderControl * dc) {
 	data->currentFrame++;
 	data->elapsedTime = ((float)mad_timer_count(data->timer,MAD_UNITS_MILLISECONDS))/1000;
 
-	if(data->muteFrame) {
-		if(!dc->seek) data->muteFrame = 0;
-		else if(dc->seekWhere<=data->elapsedTime) {
+	switch(data->muteFrame) {
+        case MUTEFRAME_SKIP:
+		data->muteFrame = 0;
+                break;
+        case MUTEFRAME_SEEK:
+		if(dc->seekWhere<=data->elapsedTime) {
                         clearOutputBuffer(cb);
                         dc->seekChunk = cb->end;
 			data->muteFrame = 0;
 			dc->seek = 0;
 		}
-	}
-	else {
-                long ret;
-            
+                break;
+        default:
 		mad_synth_frame(&data->synth,&data->frame);
 
 		for(i=0;i<(data->synth).pcm.length;i++) {
@@ -489,6 +493,7 @@ int mp3Read(mp3DecodeData * data, OutputBuffer * cb, DecoderControl * dc) {
 			}
 
 			if(data->outputPtr==data->outputBufferEnd) {
+                                long ret;
                                 ret = sendDataToOutputBuffer(cb,dc,
                                                 data->outputBuffer,
                                                 MP3_DATA_OUTPUT_BUFFER_SIZE,
@@ -506,7 +511,7 @@ int mp3Read(mp3DecodeData * data, OutputBuffer * cb, DecoderControl * dc) {
 
 		if(dc->seek) {
 			long i = 0;
-			data->muteFrame = 1;
+			data->muteFrame = MUTEFRAME_SEEK;
 			while(i<data->highestFrame && dc->seekWhere >
 					((float)mad_timer_count(data->times[i],
 					MAD_UNITS_MILLISECONDS))/1000) 
@@ -524,6 +529,7 @@ int mp3Read(mp3DecodeData * data, OutputBuffer * cb, DecoderControl * dc) {
                                 }
 				dc->seek = 0;
 			}
+                        else if(!data->inStream->seekable) dc->seek = 0;
 		}
 	}
 
-- 
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