mirror of
https://github.com/alsa-project/alsa-utils
synced 2024-12-23 00:16:31 +01:00
134 lines
3.5 KiB
C
134 lines
3.5 KiB
C
#ifndef FORMATS_H
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#define FORMATS_H 1
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#include <endian.h>
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#include <byteswap.h>
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/* Definitions for .VOC files */
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#define VOC_MAGIC_STRING "Creative Voice File\x1A"
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#define VOC_ACTUAL_VERSION 0x010A
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#define VOC_SAMPLESIZE 8
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#define VOC_MODE_MONO 0
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#define VOC_MODE_STEREO 1
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#define VOC_DATALEN(bp) ((u_long)(bp->datalen) | \
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((u_long)(bp->datalen_m) << 8) | \
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((u_long)(bp->datalen_h) << 16) )
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typedef struct voc_header {
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u_char magic[20]; /* must be MAGIC_STRING */
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u_short headerlen; /* Headerlength, should be 0x1A */
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u_short version; /* VOC-file version */
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u_short coded_ver; /* 0x1233-version */
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} VocHeader;
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typedef struct voc_blocktype {
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u_char type;
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u_char datalen; /* low-byte */
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u_char datalen_m; /* medium-byte */
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u_char datalen_h; /* high-byte */
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} VocBlockType;
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typedef struct voc_voice_data {
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u_char tc;
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u_char pack;
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} VocVoiceData;
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typedef struct voc_ext_block {
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u_short tc;
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u_char pack;
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u_char mode;
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} VocExtBlock;
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/* Definitions for Microsoft WAVE format */
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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#define COMPOSE_ID(a,b,c,d) ((a) | ((b)<<8) | ((c)<<16) | ((d)<<24))
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#define LE_SHORT(v) (v)
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#define LE_INT(v) (v)
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#define BE_SHORT(v) bswap_16(v)
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#define BE_INT(v) bswap_32(v)
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#elif __BYTE_ORDER == __BIG_ENDIAN
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#define COMPOSE_ID(a,b,c,d) ((d) | ((c)<<8) | ((b)<<16) | ((a)<<24))
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#define LE_SHORT(v) bswap_16(v)
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#define LE_INT(v) bswap_32(v)
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#define BE_SHORT(v) (v)
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#define BE_INT(v) (v)
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#else
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#error "Wrong endian"
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#endif
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/* Note: the following macros evaluate the parameter v twice */
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#define TO_CPU_SHORT(v, be) \
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((be) ? BE_SHORT(v) : LE_SHORT(v))
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#define TO_CPU_INT(v, be) \
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((be) ? BE_INT(v) : LE_INT(v))
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#define WAV_RIFF COMPOSE_ID('R','I','F','F')
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#define WAV_RIFX COMPOSE_ID('R','I','F','X')
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#define WAV_WAVE COMPOSE_ID('W','A','V','E')
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#define WAV_FMT COMPOSE_ID('f','m','t',' ')
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#define WAV_DATA COMPOSE_ID('d','a','t','a')
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/* WAVE fmt block constants from Microsoft mmreg.h header */
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#define WAV_FMT_PCM 0x0001
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#define WAV_FMT_IEEE_FLOAT 0x0003
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#define WAV_FMT_DOLBY_AC3_SPDIF 0x0092
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#define WAV_FMT_EXTENSIBLE 0xfffe
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/* Used with WAV_FMT_EXTENSIBLE format */
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#define WAV_GUID_TAG "\x00\x00\x00\x00\x10\x00\x80\x00\x00\xAA\x00\x38\x9B\x71"
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/* it's in chunks like .voc and AMIGA iff, but my source say there
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are in only in this combination, so I combined them in one header;
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it works on all WAVE-file I have
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*/
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typedef struct {
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u_int magic; /* 'RIFF' */
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u_int length; /* filelen */
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u_int type; /* 'WAVE' */
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} WaveHeader;
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typedef struct {
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u_short format; /* see WAV_FMT_* */
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u_short channels;
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u_int sample_fq; /* frequence of sample */
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u_int byte_p_sec;
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u_short byte_p_spl; /* samplesize; 1 or 2 bytes */
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u_short bit_p_spl; /* 8, 12 or 16 bit */
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} WaveFmtBody;
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typedef struct {
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WaveFmtBody format;
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u_short ext_size;
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u_short bit_p_spl;
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u_int channel_mask;
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u_short guid_format; /* WAV_FMT_* */
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u_char guid_tag[14]; /* WAV_GUID_TAG */
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} WaveFmtExtensibleBody;
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typedef struct {
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u_int type; /* 'data' */
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u_int length; /* samplecount */
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} WaveChunkHeader;
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/* Definitions for Sparc .au header */
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#define AU_MAGIC COMPOSE_ID('.','s','n','d')
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#define AU_FMT_ULAW 1
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#define AU_FMT_LIN8 2
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#define AU_FMT_LIN16 3
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typedef struct au_header {
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u_int magic; /* '.snd' */
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u_int hdr_size; /* size of header (min 24) */
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u_int data_size; /* size of data */
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u_int encoding; /* see to AU_FMT_XXXX */
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u_int sample_rate; /* sample rate */
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u_int channels; /* number of channels (voices) */
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} AuHeader;
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#endif /* FORMATS */
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