implement new CUESHEET metadata block

1 files changed, 90 insertions, 0 deletions

diff --git a/src/libFLAC/format.c b/src/libFLAC/format.c
index b1da684c..c76f799a 100644
--- a/src/libFLAC/format.c
+++ b/src/libFLAC/format.c
@@ -67,6 +67,22 @@ FLAC_API const FLAC__uint64 FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER = 0xffff
 FLAC_API const unsigned FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN = 32; /* bits */
 FLAC_API const unsigned FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN = 32; /* bits */
 
+FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN = 64; /* bits */
+FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN = 8; /* bits */
+FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN = 3*8; /* bits @@@@3*/
+
+FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN = 64; /* bits */
+FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN = 8; /* bits */
+FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN = 12*8; /* bits */
+FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN = 1; /* bit */
+FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN = 1; /* bit */
+FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN = 6+12*8; /* bits @@@@12*/
+FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN = 8; /* bits */
+
+FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN = 128*8; /* bits */
+FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN = 64; /* bits */
+FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN = 8; /* bits */
+
 FLAC_API const unsigned FLAC__STREAM_METADATA_IS_LAST_LEN = 1; /* bits */
 FLAC_API const unsigned FLAC__STREAM_METADATA_TYPE_LEN = 7; /* bits */
 FLAC_API const unsigned FLAC__STREAM_METADATA_LENGTH_LEN = 24; /* bits */
@@ -216,6 +232,80 @@ FLAC_API unsigned FLAC__format_seektable_sort(FLAC__StreamMetadata_SeekTable *se
         return j;
 }
 
+FLAC_API FLAC__bool FLAC__format_cuesheet_is_legal(const FLAC__StreamMetadata_CueSheet *cue_sheet, FLAC__bool check_cd_da_subset, const char **violation)
+{
+        unsigned i, j;
+
+        if(check_cd_da_subset) {
+                if(cue_sheet->lead_in < 2 * 44100) {
+                        if(violation) *violation = "CD-DA cue sheet must have a lead-in length of at least 2 seconds";
+                        return false;
+                }
+                if(cue_sheet->lead_in % 588 != 0) {
+                        if(violation) *violation = "CD-DA cue sheet lead-in length must be evenly divisible by 588 samples";
+                        return false;
+                }
+        }
+
+        if(cue_sheet->num_tracks == 0) {
+                if(violation) *violation = "cue sheet must have at least one track (the lead-out)";
+                return false;
+        }
+
+        if(check_cd_da_subset && cue_sheet->tracks[cue_sheet->num_tracks-1].number != 170) {
+                if(violation) *violation = "CD-DA cue sheet must have a lead-out track number 170 (0xAA)";
+                return false;
+        }
+
+        for(i = 0; i < cue_sheet->num_tracks; i++) {
+                if(cue_sheet->tracks[i].number == 0) {
+                        if(violation) *violation = "cue sheet may not have a track number 0";
+                        return false;
+                }
+
+                if(check_cd_da_subset) {
+                        if(!((cue_sheet->tracks[i].number >= 1 && cue_sheet->tracks[i].number <= 99) || cue_sheet->tracks[i].number == 170)) {
+                                if(violation) *violation = "CD-DA cue sheet track number must be 1-99 or 170";
+                                return false;
+                        }
+                }
+
+                if(check_cd_da_subset && cue_sheet->tracks[i].offset % 588 != 0) {
+                        if(violation) *violation = "CD-DA cue sheet track offset must be evenly divisible by 588 samples";
+                        return false;
+                }
+
+                if(cue_sheet->tracks[i].num_indices == 0) {
+                        if(violation) *violation = "cue sheet track must have at least one index point";
+                        return false;
+                }
+
+                if(cue_sheet->tracks[i].indices[0].number > 1) {
+                        if(violation) *violation = "cue sheet track's first index number must be 0 or 1";
+                        return false;
+                }
+
+                for(j = 0; j < cue_sheet->tracks[i].num_indices; j++) {
+                        if(check_cd_da_subset && cue_sheet->tracks[i].indices[j].offset % 588 != 0) {
+                                if(violation) *violation = "CD-DA cue sheet track index offset must be evenly divisible by 588 samples";
+                                return false;
+                        }
+
+                        if(j > 0) {
+                                if(cue_sheet->tracks[i].indices[j].number != cue_sheet->tracks[i].indices[j-1].number + 1) {
+                                        if(violation) *violation = "cue sheet track index numbers must increase by 1";
+                                        return false;
+                                }
+                        }
+                }
+        }
+
+        return true;
+}
+
+/*
+ * These routines are private to libFLAC
+ */
 unsigned FLAC__format_get_max_rice_partition_order(unsigned blocksize, unsigned predictor_order)
 {
         return