Commit 0eddfe9c authored by Christophe Massiot's avatar Christophe Massiot
Browse files

* Minor bitstream optimization.

parent ea94227e
......@@ -2,7 +2,7 @@
* input_ext-dec.h: structures exported to the VideoLAN decoders
*****************************************************************************
* Copyright (C) 1999, 2000 VideoLAN
* $Id: input_ext-dec.h,v 1.18 2001/01/21 01:36:25 massiot Exp $
* $Id: input_ext-dec.h,v 1.19 2001/01/22 18:04:10 massiot Exp $
*
* Authors:
*
......@@ -312,9 +312,10 @@ static __inline__ u32 GetBits( bit_stream_t * p_bit_stream,
{
u32 i_result;
if( p_bit_stream->fifo.i_available >= i_bits )
p_bit_stream->fifo.i_available -= i_bits;
if( p_bit_stream->fifo.i_available >= 0 )
{
p_bit_stream->fifo.i_available -= i_bits;
i_result = p_bit_stream->fifo.buffer
>> (8 * sizeof(WORD_TYPE) - i_bits);
p_bit_stream->fifo.buffer <<= i_bits;
......@@ -323,7 +324,6 @@ static __inline__ u32 GetBits( bit_stream_t * p_bit_stream,
if( p_bit_stream->p_byte <= p_bit_stream->p_end - sizeof(WORD_TYPE) )
{
p_bit_stream->fifo.i_available -= i_bits;
i_result = p_bit_stream->fifo.buffer
>> (8 * sizeof(WORD_TYPE) - i_bits);
p_bit_stream->fifo.buffer = WORD_AT( p_bit_stream->p_byte );
......@@ -373,6 +373,7 @@ static __inline__ u32 GetBits32( bit_stream_t * p_bit_stream )
return( i_result );
}
p_bit_stream->fifo.i_available -= 32;
return UnalignedGetBits( p_bit_stream, 32 );
}
#else
......
......@@ -184,7 +184,7 @@ u32 UnalignedGetBits( bit_stream_t * p_bit_stream, unsigned int i_bits )
i_result = p_bit_stream->fifo.buffer
>> (8 * sizeof(WORD_TYPE) - i_bits);
i_bits -= p_bit_stream->fifo.i_available;
i_bits = -p_bit_stream->fifo.i_available;
/* Gather missing bytes. */
while( i_bits >= 8 )
......
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