1 files changed, 91 insertions, 0 deletions
diff --git a/src/demuxers/flacutils.h b/src/demuxers/flacutils.h
new file mode 100644
index 000000000..67f5d66c9
--- /dev/null
+++ b/src/demuxers/flacutils.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2006 the xine project
+ * Based on the FLAC File Demuxer by Mike Melanson
+ *
+ * This file is part of xine, a free video player.
+ *
+ * xine is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * xine is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
+ */
+
+#ifndef __FLACUTILS_H__
+#define __FLACUTILS_H__
+
+typedef struct {
+  off_t offset;
+  int64_t sample_number;
+  int64_t pts;
+  int size;
+} flac_seekpoint_t;
+
+#define FLAC_SIGNATURE_SIZE 4
+#define FLAC_STREAMINFO_SIZE 34
+#define FLAC_SEEKPOINT_SIZE 18
+
+enum {
+  FLAC_BLOCKTYPE_STREAMINFO,
+  FLAC_BLOCKTYPE_PADDING,
+  FLAC_BLOCKTYPE_APPLICATION,
+  FLAC_BLOCKTYPE_SEEKTABLE,
+  FLAC_BLOCKTYPE_VORBIS_COMMENT,
+  FLAC_BLOCKTYPE_CUESHEET,
+  FLAC_BLOCKTYPE_INVALID = 127
+};
+
+/*
+ * WARNING: These structures are *not* using the same format
+ *          used by FLAC files, bitwise.
+ *
+ * Using bitfields to read the whole data is unfeasible because
+ * of endianness problems with non-byte-aligned values.
+ */
+
+typedef struct {
+  uint8_t last;
+  uint8_t blocktype;
+  uint32_t length;
+} xine_flac_metadata_header;
+
+typedef struct {
+  uint16_t blocksize_min;
+  uint16_t blocksize_max;
+  uint32_t framesize_min;
+  uint32_t framesize_max;
+  uint32_t samplerate;
+  uint8_t channels;
+  uint8_t bits_per_sample;
+  uint64_t total_samples;
+  uint8_t md5[16];
+} xine_flac_streaminfo_block;
+
+static inline void _x_parse_flac_metadata_header(uint8_t *buffer, xine_flac_metadata_header *parsed) {
+  parsed->last = buffer[0] & 0x80 ? 1 : 0;
+  parsed->blocktype = buffer[0] & 0x7f;
+
+  parsed->length = BE_24(&buffer[1]);
+}
+
+static inline void _x_parse_flac_streaminfo_block(uint8_t *buffer, xine_flac_streaminfo_block *parsed) {
+  parsed->blocksize_min = BE_16(&buffer[0]);
+  parsed->blocksize_max = BE_16(&buffer[2]);
+  parsed->framesize_min = BE_24(&buffer[4]);
+  parsed->framesize_max = BE_24(&buffer[7]);
+  parsed->samplerate = BE_32(&buffer[10]);
+  parsed->channels = ((parsed->samplerate >> 9) & 0x07) + 1;
+  parsed->bits_per_sample = ((parsed->samplerate >> 4) & 0x1F) + 1;
+  parsed->samplerate >>= 12;
+  parsed->total_samples = BE_64(&buffer[10]) & UINT64_C(0x0FFFFFFFFF);  /* 36 bits */
+}
+
+#endif