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add seekpoint placeholder

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This commit is contained in:
Josh Coalson 2001-04-13 18:22:25 +00:00
parent cff71c88ac
commit 167658a907
2 changed files with 11 additions and 6 deletions
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13
include/FLAC/format.h
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@ -391,23 +391,25 @@ extern const unsigned FLAC__STREAM_METADATA_APPLICATION_ID_LEN; /* = 32 bits */
/*****************************************************************************
*
* 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 @@ extern const unsigned FLAC__STREAM_METADATA_SEEKPOINT_LEN; /* = 18 bytes */
* 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.

4
src/libFLAC/format.c
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@ -40,9 +40,11 @@ const unsigned FLAC__STREAM_METADATA_APPLICATION_ID_LEN = 32; /* bits */
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 */