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-rw-r--r--engine/voice_codecs/speex/source/libspeex/bits.c352
1 files changed, 352 insertions, 0 deletions
diff --git a/engine/voice_codecs/speex/source/libspeex/bits.c b/engine/voice_codecs/speex/source/libspeex/bits.c
new file mode 100644
index 0000000..68285e0
--- /dev/null
+++ b/engine/voice_codecs/speex/source/libspeex/bits.c
@@ -0,0 +1,352 @@
+/* Copyright (C) 2002 Jean-Marc Valin
+ File: speex_bits.c
+
+ Handles bit packing/unpacking
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ - Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ - Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+
+ - Neither the name of the Xiph.org Foundation nor the names of its
+ contributors may be used to endorse or promote products derived from
+ this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
+ CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+*/
+
+#include "speex_bits.h"
+#include "misc.h"
+
+void speex_bits_init(SpeexBits *bits)
+{
+ int i;
+ bits->bytes = (char*)speex_alloc(MAX_BYTES_PER_FRAME);
+ bits->buf_size = MAX_BYTES_PER_FRAME;
+
+ for (i=0;i<bits->buf_size;i++)
+ bits->bytes[i]=0;
+ bits->nbBits=0;
+ bits->bytePtr=0;
+ bits->bitPtr=0;
+ bits->owner=1;
+ bits->overflow=0;
+}
+
+void speex_bits_init_buffer(SpeexBits *bits, void *buff, int buf_size)
+{
+ int i;
+ bits->bytes = (char*)buff;
+ bits->buf_size = buf_size;
+
+ for (i=0;i<buf_size;i++)
+ bits->bytes[i]=0;
+ bits->nbBits=0;
+ bits->bytePtr=0;
+ bits->bitPtr=0;
+ bits->owner=0;
+ bits->overflow=0;
+}
+
+void speex_bits_destroy(SpeexBits *bits)
+{
+ if (bits->owner)
+ speex_free(bits->bytes);
+ /* Will do something once the allocation is dynamic */
+}
+
+void speex_bits_reset(SpeexBits *bits)
+{
+ int i;
+ for (i=0;i<bits->buf_size;i++)
+ bits->bytes[i]=0;
+ bits->nbBits=0;
+ bits->bytePtr=0;
+ bits->bitPtr=0;
+ bits->overflow=0;
+}
+
+void speex_bits_rewind(SpeexBits *bits)
+{
+ bits->bytePtr=0;
+ bits->bitPtr=0;
+ bits->overflow=0;
+}
+
+void speex_bits_read_from(SpeexBits *bits, char *bytes, int len)
+{
+ int i;
+ if (len > bits->buf_size)
+ {
+ speex_warning_int("Packet if larger than allocated buffer: ", len);
+ if (bits->owner)
+ {
+ char *tmp = (char*)speex_realloc(bits->bytes, len);
+ if (tmp)
+ {
+ bits->buf_size=len;
+ bits->bytes=tmp;
+ } else {
+ len=bits->buf_size;
+ speex_warning("Could not resize input buffer: truncating input");
+ }
+ } else {
+ speex_warning("Do not own input buffer: truncating input");
+ len=bits->buf_size;
+ }
+ }
+ for (i=0;i<len;i++)
+ bits->bytes[i]=bytes[i];
+ bits->nbBits=len<<3;
+ bits->bytePtr=0;
+ bits->bitPtr=0;
+ bits->overflow=0;
+}
+
+static void speex_bits_flush(SpeexBits *bits)
+{
+ int i;
+ if (bits->bytePtr>0)
+ {
+ for (i=bits->bytePtr;i<((bits->nbBits+7)>>3);i++)
+ bits->bytes[i-bits->bytePtr]=bits->bytes[i];
+ }
+ bits->nbBits -= bits->bytePtr<<3;
+ bits->bytePtr=0;
+}
+
+void speex_bits_read_whole_bytes(SpeexBits *bits, char *bytes, int len)
+{
+ int i,pos;
+
+ if ((bits->nbBits>>3)+len+1 > bits->buf_size)
+ {
+ speex_warning_int("Packet if larger than allocated buffer: ", len);
+ if (bits->owner)
+ {
+ char *tmp = (char*)speex_realloc(bits->bytes, (bits->nbBits>>3)+len+1);
+ if (tmp)
+ {
+ bits->buf_size=(bits->nbBits>>3)+len+1;
+ bits->bytes=tmp;
+ } else {
+ len=bits->buf_size-(bits->nbBits>>3)-1;
+ speex_warning("Could not resize input buffer: truncating input");
+ }
+ } else {
+ speex_warning("Do not own input buffer: truncating input");
+ len=bits->buf_size;
+ }
+ }
+
+ speex_bits_flush(bits);
+ pos=bits->nbBits>>3;
+ for (i=0;i<len;i++)
+ bits->bytes[pos+i]=bytes[i];
+ bits->nbBits+=len<<3;
+}
+
+int speex_bits_write(SpeexBits *bits, char *bytes, int max_len)
+{
+ int i;
+ if (max_len > ((bits->nbBits+7)>>3))
+ max_len = ((bits->nbBits+7)>>3);
+ for (i=0;i<max_len;i++)
+ bytes[i]=bits->bytes[i];
+ return max_len;
+}
+
+int speex_bits_write_whole_bytes(SpeexBits *bits, char *bytes, int max_len)
+{
+ int i;
+ if (max_len > ((bits->nbBits)>>3))
+ max_len = ((bits->nbBits)>>3);
+ for (i=0;i<max_len;i++)
+ bytes[i]=bits->bytes[i];
+
+ if (bits->bitPtr>0)
+ bits->bytes[0]=bits->bytes[max_len];
+ else
+ bits->bytes[0]=0;
+ for (i=1;i<((bits->nbBits)>>3)+1;i++)
+ bits->bytes[i]=0;
+ bits->bytePtr=0;
+ bits->nbBits &= 7;
+ return max_len;
+}
+
+
+void speex_bits_pack(SpeexBits *bits, int data, int nbBits)
+{
+ int i;
+ unsigned int d=data;
+
+ if (bits->bytePtr+((nbBits+bits->bitPtr)>>3) >= bits->buf_size)
+ {
+ speex_warning("Buffer too small to pack bits");
+ if (bits->owner)
+ {
+ char *tmp = (char*)speex_realloc(bits->bytes, ((bits->buf_size+5)*3)>>1);
+ if (tmp)
+ {
+ for (i=bits->buf_size;i<(((bits->buf_size+5)*3)>>1);i++)
+ tmp[i]=0;
+ bits->buf_size=((bits->buf_size+5)*3)>>1;
+ bits->bytes=tmp;
+ } else {
+ speex_warning("Could not resize input buffer: not packing");
+ return;
+ }
+ } else {
+ speex_warning("Do not own input buffer: not packing");
+ return;
+ }
+ }
+
+ while(nbBits)
+ {
+ int bit;
+ bit = (d>>(nbBits-1))&1;
+ bits->bytes[bits->bytePtr] |= bit<<(7-bits->bitPtr);
+ bits->bitPtr++;
+
+ if (bits->bitPtr==8)
+ {
+ bits->bitPtr=0;
+ bits->bytePtr++;
+ }
+ bits->nbBits++;
+ nbBits--;
+ }
+}
+
+int speex_bits_unpack_signed(SpeexBits *bits, int nbBits)
+{
+ unsigned int d=speex_bits_unpack_unsigned(bits,nbBits);
+ /* If number is negative */
+ if (d>>(nbBits-1))
+ {
+ d |= (-1)<<nbBits;
+ }
+ return d;
+}
+
+unsigned int speex_bits_unpack_unsigned(SpeexBits *bits, int nbBits)
+{
+ unsigned int d=0;
+ if ((bits->bytePtr<<3)+bits->bitPtr+nbBits>bits->nbBits)
+ bits->overflow=1;
+ if (bits->overflow)
+ return 0;
+ while(nbBits)
+ {
+ d<<=1;
+ d |= (bits->bytes[bits->bytePtr]>>(7-bits->bitPtr))&1;
+ bits->bitPtr++;
+ if (bits->bitPtr==8)
+ {
+ bits->bitPtr=0;
+ bits->bytePtr++;
+ }
+ nbBits--;
+ }
+ return d;
+}
+
+unsigned int speex_bits_peek_unsigned(SpeexBits *bits, int nbBits)
+{
+ unsigned int d=0;
+ int bitPtr, bytePtr;
+ char *bytes;
+
+ if ((bits->bytePtr<<3)+bits->bitPtr+nbBits>bits->nbBits)
+ bits->overflow=1;
+ if (bits->overflow)
+ return 0;
+
+ bitPtr=bits->bitPtr;
+ bytePtr=bits->bytePtr;
+ bytes = bits->bytes;
+ while(nbBits)
+ {
+ d<<=1;
+ d |= (bytes[bytePtr]>>(7-bitPtr))&1;
+ bitPtr++;
+ if (bitPtr==8)
+ {
+ bitPtr=0;
+ bytePtr++;
+ }
+ nbBits--;
+ }
+ return d;
+}
+
+int speex_bits_peek(SpeexBits *bits)
+{
+ if ((bits->bytePtr<<3)+bits->bitPtr+1>bits->nbBits)
+ bits->overflow=1;
+ if (bits->overflow)
+ return 0;
+ return (bits->bytes[bits->bytePtr]>>(7-bits->bitPtr))&1;
+}
+
+void speex_bits_advance(SpeexBits *bits, int n)
+{
+ int nbytes, nbits;
+
+ if ((bits->bytePtr<<3)+bits->bitPtr+n>bits->nbBits)
+ bits->overflow=1;
+ if (bits->overflow)
+ return;
+
+ nbytes = n >> 3;
+ nbits = n & 7;
+
+ bits->bytePtr += nbytes;
+ bits->bitPtr += nbits;
+
+ if (bits->bitPtr>7)
+ {
+ bits->bitPtr-=8;
+ bits->bytePtr++;
+ }
+}
+
+int speex_bits_remaining(SpeexBits *bits)
+{
+ if (bits->overflow)
+ return -1;
+ else
+ return bits->nbBits-((bits->bytePtr<<3)+bits->bitPtr);
+}
+
+int speex_bits_nbytes(SpeexBits *bits)
+{
+ return ((bits->nbBits+7)>>3);
+}
+
+void speex_bits_insert_terminator(SpeexBits *bits)
+{
+ if (bits->bitPtr<7)
+ speex_bits_pack(bits, 0, 1);
+ while (bits->bitPtr<7)
+ speex_bits_pack(bits, 1, 1);
+}
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