9  * October 7, 1998 - cbagwell@sprynet.com
25   {"\x2e\x73\x6e\x64", MACHINE_IS_LITTLEENDIAN, "big-endian `.snd'"},
26   {"\x64\x6e\x73\x2e", MACHINE_IS_BIGENDIAN   , "little-endian `.snd'"},
27   {"\x00\x64\x73\x2e", MACHINE_IS_BIGENDIAN   , "little-endian `\\0ds.' (for DEC)"},
28   {"\x2e\x73\x64\x00", MACHINE_IS_LITTLEENDIAN, "big-endian `\\0ds.'"},
41   "Unspecified", "8-bit mu-law", "8-bit signed linear", "16-bit signed linear",
42   "24-bit signed linear", "32-bit signed linear", "Floating-point",
44   "8-bit fixed-point", "16-bit fixed-point", "24-bit fixed-point",
45   "32-bit fixed-point", "Unknown", "Non-audio data", "Mu-law squelch",
46   "16-bit linear with emphasis", "16-bit linear with compression",
47   "16-bit linear with emphasis and compression", "Music Kit DSP commands",
48   "Music Kit DSP samples", "4-bit G.721 ADPCM", "G.722 ADPCM",
49   "3-bit G.723 ADPCM", "5-bit G.723 ADPCM", "8-bit a-law", "Unknown"};
75     case Adpcm_g721  : *size =  4; return SOX_ENCODING_G721; /* read-only */  in sox_enc()
76     case Adpcm_g723_3: *size =  3; return SOX_ENCODING_G723; /* read-only */  in sox_enc()
77     case Adpcm_g723_5: *size =  5; return SOX_ENCODING_G723; /* read-only */  in sox_enc()
91  * Returns 1 if there is residual input, returns -1 if eof, else returns 0.
96   priv_t * p = (priv_t *) ft->priv;  in unpack_input()
99   if (p->in_bits < (int)ft->encoding.bits_per_sample) {  in unpack_input()
100     if (lsx_read_b_buf(ft, &in_byte, (size_t) 1) != 1) {  in unpack_input()
102       return -1;  in unpack_input()
104     p->in_buffer |= (in_byte << p->in_bits);  in unpack_input()
105     p->in_bits += 8;  in unpack_input()
107   *code = p->in_buffer & ((1 << ft->encoding.bits_per_sample) - 1);  in unpack_input()
108   p->in_buffer >>= ft->encoding.bits_per_sample;  in unpack_input()
109   p->in_bits -= ft->encoding.bits_per_sample;  in unpack_input()
110   return p->in_bits > 0;  in unpack_input()
115   priv_t * p = (priv_t *)ft->priv;  in dec_read()
119   for (done = 0; samp > 0 && unpack_input(ft, &code) >= 0; ++done, --samp)  in dec_read()
121         (*p->dec_routine)(code, AUDIO_ENCODING_LINEAR, &p->state),);  in dec_read()
127   priv_t * p = (priv_t *) ft->priv;  in startread()
130   uint32_t data_size;    /* big-endians.  At least extra bytes (totalling */  in startread()
131   uint32_t ft_encoding;  /* hdr_size - FIXED_HDR) are an "info" field of */  in startread()
146   ft->encoding.reverse_bytes = id[i].reverse_bytes;  in startread()
169     case Adpcm_g721  : p->dec_routine = g721_decoder   ; break;  in startread()
170     case Adpcm_g723_3: p->dec_routine = g723_24_decoder; break;  in startread()
171     case Adpcm_g723_5: p->dec_routine = g723_40_decoder; break;  in startread()
173   if (p->dec_routine) {  in startread()
174     g72x_init_state(&p->state);  in startread()
175     ft->handler.seek = NULL;  in startread()
176     ft->handler.read = dec_read;  in startread()
180     size_t info_size = hdr_size - FIXED_HDR;  in startread()
181     char * buf = lsx_calloc(1, info_size + 1); /* +1 ensures null-terminated */  in startread()
186     sox_append_comments(&ft->oob.comments, buf);  in startread()
197   char * comment  = lsx_cat_comments(ft->oob.comments);  in write_header()
198   size_t len      = strlen(comment) + 1;     /* Write out null-terminated */  in write_header()
200   int i = ft->encoding.reverse_bytes == MACHINE_IS_BIGENDIAN? 2 : 0;  in write_header()
201   uint64_t size64 = ft->olength ? ft->olength : ft->signal.length;  in write_header()
204       : size64*(ft->encoding.bits_per_sample >> 3) > UINT_MAX  in write_header()
206       : (unsigned)(size64*(ft->encoding.bits_per_sample >> 3));  in write_header()
211   ||lsx_writedw(ft, ft_enc(ft->encoding.bits_per_sample, ft->encoding.encoding))  in write_header()
212   ||lsx_writedw(ft, (unsigned)(ft->signal.rate + .5))  in write_header()
213   ||lsx_writedw(ft, ft->signal.channels)  in write_header()
215   ||lsx_padbytes(ft, info_len - len);  in write_header()