const ltcsnd_sample_t tgtval = e->state ? e->enc_hi : e->enc_lo;
if (e->offset + n >= e->bufsize) {
+#if 0
fprintf(stderr, "libltc: buffer overflow: %d/%lu\n", (int) e->offset, (unsigned long) e->bufsize);
+#endif
return 1;
}
decode_ltc(d, buf, size, posinfo);
}
+#define LTC_CONVERSION_BUF_SIZE 1024
+
#define LTCWRITE_TEMPLATE(FN, FORMAT, CONV) \
void ltc_decoder_write_ ## FN (LTCDecoder *d, FORMAT *buf, size_t size, ltc_off_t posinfo) { \
- ltcsnd_sample_t tmp[1024]; \
- size_t remain = size; \
- while (remain > 0) { \
- int c = (remain > 1024) ? 1024 : remain; \
+ ltcsnd_sample_t tmp[LTC_CONVERSION_BUF_SIZE]; \
+ size_t copyStart = 0; \
+ while (copyStart < size) { \
int i; \
- for (i=0; i<c; i++) { \
+ int c = size - copyStart; \
+ c = (c > LTC_CONVERSION_BUF_SIZE) ? LTC_CONVERSION_BUF_SIZE : c; \
+ for (i=0; i < c; i++) { \
tmp[i] = CONV; \
} \
- decode_ltc(d, tmp, c, posinfo + (ltc_off_t)c); \
- remain -= c; \
+ decode_ltc(d, tmp, c, posinfo + (ltc_off_t)copyStart); \
+ copyStart += c; \
} \
}
-LTCWRITE_TEMPLATE(float, float, 128 + (buf[i] * 127.0))
-LTCWRITE_TEMPLATE(s16, short, 128 + (buf[i] >> 8))
-LTCWRITE_TEMPLATE(u16, short, (buf[i] >> 8))
+LTCWRITE_TEMPLATE(float, float, 128 + (buf[copyStart+i] * 127.0))
+/* this relies on the compiler to use an arithemtic right-shift for signed values */
+LTCWRITE_TEMPLATE(s16, short, 128 + (buf[copyStart+i] >> 8))
+/* this relies on the compiler to use a logical right-shift for unsigned values */
+LTCWRITE_TEMPLATE(u16, unsigned short, (buf[copyStart+i] >> 8))
+
+#undef LTC_CONVERSION_BUF_SIZE
int ltc_decoder_read(LTCDecoder* d, LTCFrameExt* frame) {
if (!frame) return -1;
@author Robin Gareus <robin@gareus.org>
@copyright
- Copyright (C) 2006-2012 Robin Gareus <robin@gareus.org>
+ Copyright (C) 2006-2014 Robin Gareus <robin@gareus.org>
Copyright (C) 2008-2009 Jan Weiß <jan@geheimwerk.de>
extern "C" {
#endif
+#if defined _WIN32 && !defined(__LITTLE_ENDIAN__)
+#define __LITTLE_ENDIAN__
+#endif
+
+#ifdef __BIG_ENDIAN__
+# define LTC_BIG_ENDIAN
+#elif defined _BIG_ENDIAN
+# define LTC_BIG_ENDIAN
+#elif defined __BYTE_ORDER__
+# if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+# define LTC_BIG_ENDIAN
+# endif
+#elif !defined __LITTLE_ENDIAN__
+# include <endian.h> // machine/endian.h
+# if (defined __BYTE_ORDER__ && defined __ORDER_BIG_ENDIAN__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
+# define LTC_BIG_ENDIAN
+# endif
+#endif
+
#include <stddef.h> /* size_t */
#ifndef DOXYGEN_IGNORE
/* libltc version */
-#define LIBLTC_VERSION "1.1.1"
+#define LIBLTC_VERSION "1.1.4"
#define LIBLTC_VERSION_MAJOR 1
#define LIBLTC_VERSION_MINOR 1
-#define LIBLTC_VERSION_MICRO 1
+#define LIBLTC_VERSION_MICRO 4
/* interface revision number
* http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
*/
#define LIBLTC_CUR 11
-#define LIBLTC_REV 1
+#define LIBLTC_REV 3
#define LIBLTC_AGE 0
#endif /* end DOXYGEN_IGNORE */
* further information: http://www.philrees.co.uk/articles/timecode.htm
* and http://www.barney-wol.net/time/timecode.html
*/
-#if (defined __BIG_ENDIAN__ && !defined DOXYGEN_IGNORE)
+#if (defined LTC_BIG_ENDIAN && !defined DOXYGEN_IGNORE)
// Big Endian version, bytes are "upside down"
struct LTCFrame {
unsigned int user1:4;
* @param size number of samples to parse
* @param posinfo (optional, recommended) sample-offset in the audio-stream.
*/
-void ltc_decoder_write_u16(LTCDecoder *d, short *buf, size_t size, ltc_off_t posinfo);
+void ltc_decoder_write_u16(LTCDecoder *d, unsigned short *buf, size_t size, ltc_off_t posinfo);
/**
* Decoded LTC frames are placed in a queue. This function retrieves
void ltc_frame_reset(LTCFrame* frame) {
memset(frame, 0, sizeof(LTCFrame));
// syncword = 0x3FFD
-#ifdef __BIG_ENDIAN__
+#ifdef LTC_BIG_ENDIAN
// mirrored BE bit order: FCBF
frame->sync_word = 0xFCBF;
#else