48 EXPORT void speex_bits_init(SpeexBits *bits)  in speex_bits_init()  argument
50    bits->chars = (char*)speex_alloc(MAX_CHARS_PER_FRAME);  in speex_bits_init()
51    if (!bits->chars)  in speex_bits_init()
54    bits->buf_size = MAX_CHARS_PER_FRAME;  in speex_bits_init()
56    bits->owner=1;  in speex_bits_init()
58    speex_bits_reset(bits);  in speex_bits_init()
61 EXPORT void speex_bits_init_buffer(SpeexBits *bits, void *buff, int buf_size)  in speex_bits_init_buffer()  argument
63    bits->chars = (char*)buff;  in speex_bits_init_buffer()
64    bits->buf_size = buf_size;  in speex_bits_init_buffer()
66    bits->owner=0;  in speex_bits_init_buffer()
68    speex_bits_reset(bits);  in speex_bits_init_buffer()
71 EXPORT void speex_bits_set_bit_buffer(SpeexBits *bits, void *buff, int buf_size)  in speex_bits_set_bit_buffer()  argument
73    bits->chars = (char*)buff;  in speex_bits_set_bit_buffer()
74    bits->buf_size = buf_size;  in speex_bits_set_bit_buffer()
76    bits->owner=0;  in speex_bits_set_bit_buffer()
78    bits->nbBits=buf_size<<LOG2_BITS_PER_CHAR;  in speex_bits_set_bit_buffer()
79    bits->charPtr=0;  in speex_bits_set_bit_buffer()
80    bits->bitPtr=0;  in speex_bits_set_bit_buffer()
81    bits->overflow=0;  in speex_bits_set_bit_buffer()
85 EXPORT void speex_bits_destroy(SpeexBits *bits)  in speex_bits_destroy()  argument
87    if (bits->owner)  in speex_bits_destroy()
88       speex_free(bits->chars);  in speex_bits_destroy()
92 EXPORT void speex_bits_reset(SpeexBits *bits)  in speex_bits_reset()  argument
95    bits->chars[0]=0;  in speex_bits_reset()
96    bits->nbBits=0;  in speex_bits_reset()
97    bits->charPtr=0;  in speex_bits_reset()
98    bits->bitPtr=0;  in speex_bits_reset()
99    bits->overflow=0;  in speex_bits_reset()
102 EXPORT void speex_bits_rewind(SpeexBits *bits)  in speex_bits_rewind()  argument
104    bits->charPtr=0;  in speex_bits_rewind()
105    bits->bitPtr=0;  in speex_bits_rewind()
106    bits->overflow=0;  in speex_bits_rewind()
109 EXPORT void speex_bits_read_from(SpeexBits *bits, char *chars, int len)  in speex_bits_read_from()  argument
113    if (nchars > bits->buf_size)  in speex_bits_read_from()
116       if (bits->owner)  in speex_bits_read_from()
118          char *tmp = (char*)speex_realloc(bits->chars, nchars);  in speex_bits_read_from()
121             bits->buf_size=nchars;  in speex_bits_read_from()
122             bits->chars=tmp;  in speex_bits_read_from()
124             nchars=bits->buf_size;  in speex_bits_read_from()
129          nchars=bits->buf_size;  in speex_bits_read_from()
139       bits->chars[i]=HTOLS(chars[i]);  in speex_bits_read_from()
141    bits->nbBits=nchars<<LOG2_BITS_PER_CHAR;  in speex_bits_read_from()
142    bits->charPtr=0;  in speex_bits_read_from()
143    bits->bitPtr=0;  in speex_bits_read_from()
144    bits->overflow=0;  in speex_bits_read_from()
147 static void speex_bits_flush(SpeexBits *bits)  in speex_bits_flush()  argument
149    int nchars = ((bits->nbBits+BITS_PER_CHAR-1)>>LOG2_BITS_PER_CHAR);  in speex_bits_flush()
150    if (bits->charPtr>0)  in speex_bits_flush()
151       SPEEX_MOVE(bits->chars, &bits->chars[bits->charPtr], nchars-bits->charPtr);  in speex_bits_flush()
152    bits->nbBits -= bits->charPtr<<LOG2_BITS_PER_CHAR;  in speex_bits_flush()
153    bits->charPtr=0;  in speex_bits_flush()
156 EXPORT void speex_bits_read_whole_bytes(SpeexBits *bits, char *chars, int nbytes)  in speex_bits_read_whole_bytes()  argument
161    if (((bits->nbBits+BITS_PER_CHAR-1)>>LOG2_BITS_PER_CHAR)+nchars > bits->buf_size)  in speex_bits_read_whole_bytes()
164       if (bits->owner)  in speex_bits_read_whole_bytes()
166          char *tmp = (char*)speex_realloc(bits->chars, (bits->nbBits>>LOG2_BITS_PER_CHAR)+nchars+1);  in speex_bits_read_whole_bytes()
169             bits->buf_size=(bits->nbBits>>LOG2_BITS_PER_CHAR)+nchars+1;  in speex_bits_read_whole_bytes()
170             bits->chars=tmp;  in speex_bits_read_whole_bytes()
172             nchars=bits->buf_size-(bits->nbBits>>LOG2_BITS_PER_CHAR)-1;  in speex_bits_read_whole_bytes()
177          nchars=bits->buf_size;  in speex_bits_read_whole_bytes()
181    speex_bits_flush(bits);  in speex_bits_read_whole_bytes()
182    pos=bits->nbBits>>LOG2_BITS_PER_CHAR;  in speex_bits_read_whole_bytes()
184       bits->chars[pos+i]=HTOLS(chars[i]);  in speex_bits_read_whole_bytes()
185    bits->nbBits+=nchars<<LOG2_BITS_PER_CHAR;  in speex_bits_read_whole_bytes()
188 EXPORT int speex_bits_write(SpeexBits *bits, char *chars, int max_nbytes)  in speex_bits_write()  argument
195    bitPtr=bits->bitPtr;  in speex_bits_write()
196    charPtr=bits->charPtr;  in speex_bits_write()
197    nbBits=bits->nbBits;  in speex_bits_write()
198    speex_bits_insert_terminator(bits);  in speex_bits_write()
199    bits->bitPtr=bitPtr;  in speex_bits_write()
200    bits->charPtr=charPtr;  in speex_bits_write()
201    bits->nbBits=nbBits;  in speex_bits_write()
203    if (max_nchars > ((bits->nbBits+BITS_PER_CHAR-1)>>LOG2_BITS_PER_CHAR))  in speex_bits_write()
204       max_nchars = ((bits->nbBits+BITS_PER_CHAR-1)>>LOG2_BITS_PER_CHAR);  in speex_bits_write()
207       chars[i]=HTOLS(bits->chars[i]);  in speex_bits_write()
211 EXPORT int speex_bits_write_whole_bytes(SpeexBits *bits, char *chars, int max_nbytes)  in speex_bits_write_whole_bytes()  argument
215    if (max_nchars > ((bits->nbBits)>>LOG2_BITS_PER_CHAR))  in speex_bits_write_whole_bytes()
216       max_nchars = ((bits->nbBits)>>LOG2_BITS_PER_CHAR);  in speex_bits_write_whole_bytes()
218       chars[i]=HTOLS(bits->chars[i]);  in speex_bits_write_whole_bytes()
220    if (bits->bitPtr>0)  in speex_bits_write_whole_bytes()
221       bits->chars[0]=bits->chars[max_nchars];  in speex_bits_write_whole_bytes()
223       bits->chars[0]=0;  in speex_bits_write_whole_bytes()
224    bits->charPtr=0;  in speex_bits_write_whole_bytes()
225    bits->nbBits &= (BITS_PER_CHAR-1);  in speex_bits_write_whole_bytes()
229 EXPORT void speex_bits_pack(SpeexBits *bits, int data, int nbBits)  in speex_bits_pack()  argument
233    if (bits->charPtr+((nbBits+bits->bitPtr)>>LOG2_BITS_PER_CHAR) >= bits->buf_size)  in speex_bits_pack()
236       if (bits->owner)  in speex_bits_pack()
238          int new_nchars = ((bits->buf_size+5)*3)>>1;  in speex_bits_pack()
239          char *tmp = (char*)speex_realloc(bits->chars, new_nchars);  in speex_bits_pack()
242             bits->buf_size=new_nchars;  in speex_bits_pack()
243             bits->chars=tmp;  in speex_bits_pack()
258       bits->chars[bits->charPtr] |= bit<<(BITS_PER_CHAR-1-bits->bitPtr);  in speex_bits_pack()
259       bits->bitPtr++;  in speex_bits_pack()
261       if (bits->bitPtr==BITS_PER_CHAR)  in speex_bits_pack()
263          bits->bitPtr=0;  in speex_bits_pack()
264          bits->charPtr++;  in speex_bits_pack()
265          bits->chars[bits->charPtr] = 0;  in speex_bits_pack()
267       bits->nbBits++;  in speex_bits_pack()
272 EXPORT int speex_bits_unpack_signed(SpeexBits *bits, int nbBits)  in speex_bits_unpack_signed()  argument
274    unsigned int d=speex_bits_unpack_unsigned(bits,nbBits);  in speex_bits_unpack_signed()
283 EXPORT unsigned int speex_bits_unpack_unsigned(SpeexBits *bits, int nbBits)  in speex_bits_unpack_unsigned()  argument
286    if ((bits->charPtr<<LOG2_BITS_PER_CHAR)+bits->bitPtr+nbBits>bits->nbBits)  in speex_bits_unpack_unsigned()
287       bits->overflow=1;  in speex_bits_unpack_unsigned()
288    if (bits->overflow)  in speex_bits_unpack_unsigned()
293       d |= (bits->chars[bits->charPtr]>>(BITS_PER_CHAR-1 - bits->bitPtr))&1;  in speex_bits_unpack_unsigned()
294       bits->bitPtr++;  in speex_bits_unpack_unsigned()
295       if (bits->bitPtr==BITS_PER_CHAR)  in speex_bits_unpack_unsigned()
297          bits->bitPtr=0;  in speex_bits_unpack_unsigned()
298          bits->charPtr++;  in speex_bits_unpack_unsigned()
305 EXPORT unsigned int speex_bits_peek_unsigned(SpeexBits *bits, int nbBits)  in speex_bits_peek_unsigned()  argument
311    if ((bits->charPtr<<LOG2_BITS_PER_CHAR)+bits->bitPtr+nbBits>bits->nbBits)  in speex_bits_peek_unsigned()
312      bits->overflow=1;  in speex_bits_peek_unsigned()
313    if (bits->overflow)  in speex_bits_peek_unsigned()
316    bitPtr=bits->bitPtr;  in speex_bits_peek_unsigned()
317    charPtr=bits->charPtr;  in speex_bits_peek_unsigned()
318    chars = bits->chars;  in speex_bits_peek_unsigned()
334 EXPORT int speex_bits_peek(SpeexBits *bits)  in speex_bits_peek()  argument
336    if ((bits->charPtr<<LOG2_BITS_PER_CHAR)+bits->bitPtr+1>bits->nbBits)  in speex_bits_peek()
337       bits->overflow=1;  in speex_bits_peek()
338    if (bits->overflow)  in speex_bits_peek()
340    return (bits->chars[bits->charPtr]>>(BITS_PER_CHAR-1 - bits->bitPtr))&1;  in speex_bits_peek()
343 EXPORT void speex_bits_advance(SpeexBits *bits, int n)  in speex_bits_advance()  argument
345     if (((bits->charPtr<<LOG2_BITS_PER_CHAR)+bits->bitPtr+n>bits->nbBits) || bits->overflow){  in speex_bits_advance()
346       bits->overflow=1;  in speex_bits_advance()
349    bits->charPtr += (bits->bitPtr+n) >> LOG2_BITS_PER_CHAR; /* divide by BITS_PER_CHAR */  in speex_bits_advance()
350    bits->bitPtr = (bits->bitPtr+n) & (BITS_PER_CHAR-1);       /* modulo by BITS_PER_CHAR */  in speex_bits_advance()
353 EXPORT int speex_bits_remaining(SpeexBits *bits)  in speex_bits_remaining()  argument
355    if (bits->overflow)  in speex_bits_remaining()
358       return bits->nbBits-((bits->charPtr<<LOG2_BITS_PER_CHAR)+bits->bitPtr);  in speex_bits_remaining()
361 EXPORT int speex_bits_nbytes(SpeexBits *bits)  in speex_bits_nbytes()  argument
363    return ((bits->nbBits+BITS_PER_CHAR-1)>>LOG2_BITS_PER_CHAR);  in speex_bits_nbytes()
366 EXPORT void speex_bits_insert_terminator(SpeexBits *bits)  in speex_bits_insert_terminator()  argument
368    if (bits->bitPtr)  in speex_bits_insert_terminator()
369       speex_bits_pack(bits, 0, 1);  in speex_bits_insert_terminator()
370    while (bits->bitPtr)  in speex_bits_insert_terminator()
371       speex_bits_pack(bits, 1, 1);  in speex_bits_insert_terminator()