From 11dda201a2d4f9458b62b03c5f0aa10a6dbb103d Mon Sep 17 00:00:00 2001
From: thor <thor@35dc7657-300d-0410-a2e5-dc2837fedb53>
Date: Thu, 28 Apr 2011 15:57:26 +0000
Subject: [PATCH] Merge in mpg123_framepos().

git-svn-id: svn://scm.orgis.org/mpg123/trunk@2954 35dc7657-300d-0410-a2e5-dc2837fedb53
---
 src/libmpg123/frame.c     |  7 +++++++
 src/libmpg123/frame.h     |  1 +
 src/libmpg123/lfs_alias.c |  8 ++++++++
 src/libmpg123/lfs_wrap.c  | 19 +++++++++++++++++++
 src/libmpg123/mpg123.h.in |  6 ++++++
 src/libmpg123/parse.c     |  1 +
 6 files changed, 42 insertions(+)

diff --git a/src/libmpg123/frame.c b/src/libmpg123/frame.c
index 3013eca6..61546115 100644
--- a/src/libmpg123/frame.c
+++ b/src/libmpg123/frame.c
@@ -480,6 +480,7 @@ static void frame_fixed_reset(mpg123_handle *fr)
 	fr->metaflags = 0;
 	fr->outblock = mpg123_safe_buffer();
 	fr->num = -1;
+	fr->input_offset = -1;
 	fr->playnum = -1;
 	fr->accurate = TRUE;
 	fr->silent_resync = 0;
@@ -1004,3 +1005,9 @@ int attribute_align_arg mpg123_getvolume(mpg123_handle *mh, double *base, double
 	return MPG123_OK;
 }
 
+off_t attribute_align_arg mpg123_framepos(mpg123_handle *mh)
+{
+	if(mh == NULL) return MPG123_ERR;
+
+	return mh->input_offset;
+}
diff --git a/src/libmpg123/frame.h b/src/libmpg123/frame.h
index 2101e6bc..b0fa2a42 100644
--- a/src/libmpg123/frame.h
+++ b/src/libmpg123/frame.h
@@ -201,6 +201,7 @@ struct mpg123_handle_struct
 	int freesize;  /* free format frame size */
 	enum mpg123_vbr vbr; /* 1 if variable bitrate was detected */
 	off_t num; /* frame offset ... */
+	off_t input_offset; /* byte offset of this frame in input stream */
 	off_t playnum; /* playback offset... includes repetitions, reset at seeks */
 	off_t audio_start; /* The byte offset in the file where audio data begins. */
 	char accurate; /* Flag to see if we trust the frame number. */
diff --git a/src/libmpg123/lfs_alias.c b/src/libmpg123/lfs_alias.c
index e9d9789f..5c9d0a02 100644
--- a/src/libmpg123/lfs_alias.c
+++ b/src/libmpg123/lfs_alias.c
@@ -131,6 +131,14 @@ int attribute_align_arg ALIAS_NAME(mpg123_framebyframe_decode)(mpg123_handle *mh
 	return NATIVE_NAME(mpg123_framebyframe_decode)(mh, num, audio, bytes);
 }
 
+#ifdef mpg123_framepos
+#undef mpg123_framepos
+#endif
+int attribute_align_arg ALIAS_NAME(mpg123_framepos)(mpg123_handle *mh)
+{
+	return NATIVE_NAME(mpg123_framepos)(mh);
+}
+
 #ifdef mpg123_tell
 #undef mpg123_tell
 #endif
diff --git a/src/libmpg123/lfs_wrap.c b/src/libmpg123/lfs_wrap.c
index e1487ade..5018f53f 100644
--- a/src/libmpg123/lfs_wrap.c
+++ b/src/libmpg123/lfs_wrap.c
@@ -46,6 +46,7 @@ if(/^\s*EXPORT\s+(\S+)\s+(mpg123_\S+)\((.*)\);\s*$/)
 
 mpg123_decode_frame
 mpg123_framebyframe_decode
+mpg123_framepos
 mpg123_tell
 mpg123_tellframe
 mpg123_tell_stream
@@ -58,6 +59,7 @@ mpg123_set_index
 mpg123_position
 mpg123_length
 mpg123_set_filesize
+mpg123_decode_raw  ... that's experimental.
 
 Let's work on them in that order.
 */
@@ -199,6 +201,23 @@ int attribute_align_arg mpg123_framebyframe_decode(mpg123_handle *mh, long *num,
 	return err;
 }
 
+#undef mpg123_framepos
+/* off_t mpg123_framepos(mpg123_handle *mh); */
+long attribute_align_arg mpg123_framepos(mpg123_handle *mh)
+{
+	long val;
+	off_t largeval;
+
+	largeval = MPG123_LARGENAME(mpg123_tell)(mh);
+	val = largeval;
+	if(val != largeval)
+	{
+		mh->err = MPG123_LFS_OVERFLOW;
+		return MPG123_ERR;
+	}
+	return val;
+}
+
 #undef mpg123_tell
 /* off_t mpg123_tell(mpg123_handle *mh); */
 long attribute_align_arg mpg123_tell(mpg123_handle *mh)
diff --git a/src/libmpg123/mpg123.h.in b/src/libmpg123/mpg123.h.in
index ce922967..39b7e184 100644
--- a/src/libmpg123/mpg123.h.in
+++ b/src/libmpg123/mpg123.h.in
@@ -82,6 +82,7 @@
 #define mpg123_set_filesize MPG123_LARGENAME(mpg123_set_filesize)
 #define mpg123_replace_reader MPG123_LARGENAME(mpg123_replace_reader)
 #define mpg123_replace_reader_handle MPG123_LARGENAME(mpg123_replace_reader_handle)
+#define mpg123_framepos MPG123_LARGENAME(mpg123_framepos)
 
 #endif /* largefile hackery */
 
@@ -538,6 +539,11 @@ EXPORT int mpg123_framebyframe_next(mpg123_handle *mh);
  */
 EXPORT int mpg123_framedata(mpg123_handle *mh, unsigned long *header, unsigned char **bodydata, size_t *bodybytes);
 
+/** Get the input position (byte offset in stream) of the last parsed frame.
+ * This can be used for external seek index building, for example.
+ * It just returns the internally stored offset, regardless of validity -- you ensure that a valid frame has been parsed before! */
+EXPORT off_t mpg123_framepos(mpg123_handle *mh);
+
 /*@}*/
 
 
diff --git a/src/libmpg123/parse.c b/src/libmpg123/parse.c
index f6aa12b0..81451a8f 100644
--- a/src/libmpg123/parse.c
+++ b/src/libmpg123/parse.c
@@ -565,6 +565,7 @@ init_resync:
 	halfspeed_prepare(fr);
 
 	/* index the position */
+	fr->input_offset = framepos;
 #ifdef FRAME_INDEX
 	/* Keep track of true frame positions in our frame index.
 	   but only do so when we are sure that the frame number is accurate... */