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authorfulup <fulup.arfoll@iot.bzh>2017-04-02 12:10:49 +0200
committerfulup <fulup.arfoll@iot.bzh>2017-04-02 12:10:49 +0200
commit9d9c6e4845fa552053644701f46c728d609af010 (patch)
treeca429915a4f7664d9020066467a7640b98ed1ef8 /Common/AudioFormat.h
parent96af1f5703eefd3ee172a93c75f60b1574f152a7 (diff)
Documentation
Diffstat (limited to 'Common/AudioFormat.h')
-rw-r--r--Common/AudioFormat.h134
1 files changed, 134 insertions, 0 deletions
diff --git a/Common/AudioFormat.h b/Common/AudioFormat.h
new file mode 100644
index 0000000..ac0a2b0
--- /dev/null
+++ b/Common/AudioFormat.h
@@ -0,0 +1,134 @@
+#ifndef FORMATS_H
+#define FORMATS_H 1
+
+#include <endian.h>
+#include <byteswap.h>
+
+/* Definitions for .VOC files */
+
+#define VOC_MAGIC_STRING "Creative Voice File\x1A"
+#define VOC_ACTUAL_VERSION 0x010A
+#define VOC_SAMPLESIZE 8
+
+#define VOC_MODE_MONO 0
+#define VOC_MODE_STEREO 1
+
+#define VOC_DATALEN(bp) ((u_long)(bp->datalen) | \
+ ((u_long)(bp->datalen_m) << 8) | \
+ ((u_long)(bp->datalen_h) << 16) )
+
+typedef struct voc_header {
+ u_char magic[20]; /* must be MAGIC_STRING */
+ u_short headerlen; /* Headerlength, should be 0x1A */
+ u_short version; /* VOC-file version */
+ u_short coded_ver; /* 0x1233-version */
+} VocHeader;
+
+typedef struct voc_blocktype {
+ u_char type;
+ u_char datalen; /* low-byte */
+ u_char datalen_m; /* medium-byte */
+ u_char datalen_h; /* high-byte */
+} VocBlockType;
+
+typedef struct voc_voice_data {
+ u_char tc;
+ u_char pack;
+} VocVoiceData;
+
+typedef struct voc_ext_block {
+ u_short tc;
+ u_char pack;
+ u_char mode;
+} VocExtBlock;
+
+/* Definitions for Microsoft WAVE format */
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define COMPOSE_ID(a,b,c,d) ((a) | ((b)<<8) | ((c)<<16) | ((d)<<24))
+#define LE_SHORT(v) (v)
+#define LE_INT(v) (v)
+#define BE_SHORT(v) bswap_16(v)
+#define BE_INT(v) bswap_32(v)
+#elif __BYTE_ORDER == __BIG_ENDIAN
+#define COMPOSE_ID(a,b,c,d) ((d) | ((c)<<8) | ((b)<<16) | ((a)<<24))
+#define LE_SHORT(v) bswap_16(v)
+#define LE_INT(v) bswap_32(v)
+#define BE_SHORT(v) (v)
+#define BE_INT(v) (v)
+#else
+#error "Wrong endian"
+#endif
+
+/* Note: the following macros evaluate the parameter v twice */
+#define TO_CPU_SHORT(v, be) \
+ ((be) ? BE_SHORT(v) : LE_SHORT(v))
+#define TO_CPU_INT(v, be) \
+ ((be) ? BE_INT(v) : LE_INT(v))
+
+#define WAV_RIFF COMPOSE_ID('R','I','F','F')
+#define WAV_RIFX COMPOSE_ID('R','I','F','X')
+#define WAV_WAVE COMPOSE_ID('W','A','V','E')
+#define WAV_FMT COMPOSE_ID('f','m','t',' ')
+#define WAV_DATA COMPOSE_ID('d','a','t','a')
+
+/* WAVE fmt block constants from Microsoft mmreg.h header */
+#define WAV_FMT_PCM 0x0001
+#define WAV_FMT_IEEE_FLOAT 0x0003
+#define WAV_FMT_DOLBY_AC3_SPDIF 0x0092
+#define WAV_FMT_EXTENSIBLE 0xfffe
+
+/* Used with WAV_FMT_EXTENSIBLE format */
+#define WAV_GUID_TAG "\x00\x00\x00\x00\x10\x00\x80\x00\x00\xAA\x00\x38\x9B\x71"
+
+/* it's in chunks like .voc and AMIGA iff, but my source say there
+ are in only in this combination, so I combined them in one header;
+ it works on all WAVE-file I have
+ */
+typedef struct {
+ u_int magic; /* 'RIFF' */
+ u_int length; /* filelen */
+ u_int type; /* 'WAVE' */
+} WaveHeader;
+
+typedef struct {
+ u_short format; /* see WAV_FMT_* */
+ u_short channels;
+ u_int sample_fq; /* frequence of sample */
+ u_int byte_p_sec;
+ u_short byte_p_spl; /* samplesize; 1 or 2 bytes */
+ u_short bit_p_spl; /* 8, 12 or 16 bit */
+} WaveFmtBody;
+
+typedef struct {
+ WaveFmtBody format;
+ u_short ext_size;
+ u_short bit_p_spl;
+ u_int channel_mask;
+ u_short guid_format; /* WAV_FMT_* */
+ u_char guid_tag[14]; /* WAV_GUID_TAG */
+} WaveFmtExtensibleBody;
+
+typedef struct {
+ u_int type; /* 'data' */
+ u_int length; /* samplecount */
+} WaveChunkHeader;
+
+/* Definitions for Sparc .au header */
+
+#define AU_MAGIC COMPOSE_ID('.','s','n','d')
+
+#define AU_FMT_ULAW 1
+#define AU_FMT_LIN8 2
+#define AU_FMT_LIN16 3
+
+typedef struct au_header {
+ u_int magic; /* '.snd' */
+ u_int hdr_size; /* size of header (min 24) */
+ u_int data_size; /* size of data */
+ u_int encoding; /* see to AU_FMT_XXXX */
+ u_int sample_rate; /* sample rate */
+ u_int channels; /* number of channels (voices) */
+} AuHeader;
+
+#endif /* FORMATS */