add seekpoint placeholder
diff --git a/include/FLAC/format.h b/include/FLAC/format.h
index 43a8b92..d340900 100644
--- a/include/FLAC/format.h
+++ b/include/FLAC/format.h
@@ -391,23 +391,25 @@
/*****************************************************************************
*
- * 64: sample number
- * 64: offset, in bytes, from beginning of first frame to target frame
- * 16: offset, in samples, from the first sample in the target frame to the target sample
+ * 64: sample number of target frame
+ * 64: offset, in bytes, of target frame with respect to beginning of first frame
+ * 16: number of samples in the target frame
*----- -----------------
* 18 bytes total
*/
typedef struct {
uint64 sample_number;
uint64 stream_offset;
- unsigned block_offset;
+ unsigned frame_samples;
} FLAC__StreamMetaData_SeekPoint;
extern const unsigned FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN; /* = 64 bits */
extern const unsigned FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN; /* = 64 bits */
-extern const unsigned FLAC__STREAM_METADATA_SEEKPOINT_BLOCK_OFFSET_LEN; /* = 16 bits */
+extern const unsigned FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN; /* = 16 bits */
extern const unsigned FLAC__STREAM_METADATA_SEEKPOINT_LEN; /* = 18 bytes */
+extern const uint64 FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER; /* = 0xffffffffffffffff */
+
/*****************************************************************************
*
* 0: num_points is implied by the metadata block 'length' field (i.e. num_points = length / 18)
@@ -416,6 +418,7 @@
* n*18 bytes total
*
* NOTE: the seek points must be sorted by ascending sample number.
+ * NOTE: each seek point's sample number must be the first sample of the target frame.
* NOTE: each seek point's sample number must be unique within the table.
* NOTE: existence of a SEEKTABLE block implies a correct setting of total_samples in the stream_info block.
* NOTE: behavior is undefined when more than one SEEKTABLE block is present in a stream.
diff --git a/src/libFLAC/format.c b/src/libFLAC/format.c
index 291581a..3fee5f4 100644
--- a/src/libFLAC/format.c
+++ b/src/libFLAC/format.c
@@ -40,9 +40,11 @@
const unsigned FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN = 64; /* bits */
const unsigned FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN = 64; /* bits */
-const unsigned FLAC__STREAM_METADATA_SEEKPOINT_BLOCK_OFFSET_LEN = 16; /* bits */
+const unsigned FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN = 16; /* bits */
const unsigned FLAC__STREAM_METADATA_SEEKPOINT_LEN = 18; /* bytes */
+const uint64 FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER = 0xffffffffffffffff;
+
const unsigned FLAC__STREAM_METADATA_IS_LAST_LEN = 1; /* bits */
const unsigned FLAC__STREAM_METADATA_TYPE_LEN = 7; /* bits */
const unsigned FLAC__STREAM_METADATA_LENGTH_LEN = 24; /* bits */