-#ifndef __PLUGIN__
-void InitBitstream ( struct bit_stream_s *, struct decoder_fifo_s *,
- void (* pf_bitstream_callback)( struct bit_stream_s *,
- boolean_t ),
- void * p_callback_arg );
-boolean_t NextDataPacket( struct decoder_fifo_s *, struct data_packet_s ** );
-void BitstreamNextDataPacket( struct bit_stream_s * );
-u32 UnalignedShowBits( struct bit_stream_s *, unsigned int );
-void UnalignedRemoveBits( struct bit_stream_s * );
-u32 UnalignedGetBits( struct bit_stream_s *, unsigned int );
-void CurrentPTS( struct bit_stream_s *, mtime_t *, mtime_t * );
-#else
-# define InitBitstream p_symbols->InitBitstream
-# define NextDataPacket p_symbols->NextDataPacket
-# define BitstreamNextDataPacket p_symbols->BitstreamNextDataPacket
-# define UnalignedShowBits p_symbols->UnalignedShowBits
-# define UnalignedRemoveBits p_symbols->UnalignedRemoveBits
-# define UnalignedGetBits p_symbols->UnalignedGetBits
-# define CurrentPTS p_symbols->CurrentPTS
-#endif
-
-/*****************************************************************************
- * AlignWord : fill in the bit buffer so that the byte pointer be aligned
- * on a word boundary (XXX: there must be at least sizeof(WORD_TYPE) - 1
- * empty bytes in the bit buffer)
- *****************************************************************************/
-static inline void AlignWord( bit_stream_t * p_bit_stream )
-{
- while( (ptrdiff_t)p_bit_stream->p_byte
- & (sizeof(WORD_TYPE) - 1) )
- {
- if( p_bit_stream->p_byte < p_bit_stream->p_end )
- {
- p_bit_stream->fifo.buffer |= *(p_bit_stream->p_byte++)
- << (8 * sizeof(WORD_TYPE) - 8
- - p_bit_stream->fifo.i_available);
- p_bit_stream->fifo.i_available += 8;
- }
- else
- {
- BitstreamNextDataPacket( p_bit_stream );
- p_bit_stream->fifo.buffer |= *(p_bit_stream->p_byte++)
- << (8 * sizeof(WORD_TYPE) - 8
- - p_bit_stream->fifo.i_available);
- p_bit_stream->fifo.i_available += 8;
- }
- }
-}
-
-/*****************************************************************************
- * ShowBits : return i_bits bits from the bit stream
- *****************************************************************************/
-static inline u32 ShowBits( bit_stream_t * p_bit_stream,
- unsigned int i_bits )
-{
- if( p_bit_stream->fifo.i_available >= i_bits )
- {
- return( p_bit_stream->fifo.buffer >> (8 * sizeof(WORD_TYPE) - i_bits) );
- }
-
- if( p_bit_stream->p_byte <= p_bit_stream->p_end - sizeof(WORD_TYPE) )
- {
- return( (p_bit_stream->fifo.buffer |
- (WORD_AT( p_bit_stream->p_byte )
- >> p_bit_stream->fifo.i_available))
- >> (8 * sizeof(WORD_TYPE) - i_bits) );
- }
-
- return( UnalignedShowBits( p_bit_stream, i_bits ) );
-}
-
-/*****************************************************************************
- * ShowSignedBits : return i_bits bits from the bit stream, using signed
- * arithmetic
- *****************************************************************************/
-static inline s32 ShowSignedBits( bit_stream_t * p_bit_stream,
- unsigned int i_bits )
-{
- if( p_bit_stream->fifo.i_available >= i_bits )
- {
- return( (WORD_SIGNED)p_bit_stream->fifo.buffer
- >> (8 * sizeof(WORD_TYPE) - i_bits) );
- }
-
- /* You can probably do something a little faster, but now I'm tired. */
- return( (WORD_SIGNED)(ShowBits( p_bit_stream, i_bits ) << (32 - i_bits))
- >> (32 - i_bits) );
-}
-
-/*****************************************************************************
- * RemoveBits : removes i_bits bits from the bit buffer
- * XXX: do not use for 32 bits, see RemoveBits32
- *****************************************************************************/
-static inline void RemoveBits( bit_stream_t * p_bit_stream,
- unsigned int i_bits )
-{
- p_bit_stream->fifo.i_available -= i_bits;
-
- if( p_bit_stream->fifo.i_available >= 0 )
- {
- p_bit_stream->fifo.buffer <<= i_bits;
- return;
- }
-
- if( p_bit_stream->p_byte <= p_bit_stream->p_end - sizeof(WORD_TYPE) )
- {
- p_bit_stream->fifo.buffer = WORD_AT( p_bit_stream->p_byte )
- << ( -p_bit_stream->fifo.i_available );
- ((WORD_TYPE *)p_bit_stream->p_byte)++;
- p_bit_stream->fifo.i_available += sizeof(WORD_TYPE) * 8;
- return;
- }
-
- UnalignedRemoveBits( p_bit_stream );
-}
-
-/*****************************************************************************
- * RemoveBits32 : removes 32 bits from the bit buffer (and as a side effect,
- * refill it)
- *****************************************************************************/
-#if (WORD_TYPE == u32)
-static inline void RemoveBits32( bit_stream_t * p_bit_stream )
-{
- if( p_bit_stream->p_byte <= p_bit_stream->p_end - sizeof(WORD_TYPE) )
- {
- if( p_bit_stream->fifo.i_available )
- {
- p_bit_stream->fifo.buffer = WORD_AT( p_bit_stream->p_byte )
- << (32 - p_bit_stream->fifo.i_available);
- ((WORD_TYPE *)p_bit_stream->p_byte)++;
- return;
- }
-
- ((WORD_TYPE *)p_bit_stream->p_byte)++;
- return;
- }
-
- p_bit_stream->fifo.i_available -= 32;
- UnalignedRemoveBits( p_bit_stream );
-}
-#else
-# define RemoveBits32( p_bit_stream ) RemoveBits( p_bit_stream, 32 )
-#endif
-
-/*****************************************************************************
- * GetBits : returns i_bits bits from the bit stream and removes them
- * XXX: do not use for 32 bits, see GetBits32
- *****************************************************************************/
-static inline u32 GetBits( bit_stream_t * p_bit_stream,
- unsigned int i_bits )
-{
- u32 i_result;
-
- p_bit_stream->fifo.i_available -= i_bits;
-
- if( p_bit_stream->fifo.i_available >= 0 )
- {
- i_result = p_bit_stream->fifo.buffer
- >> (8 * sizeof(WORD_TYPE) - i_bits);
- p_bit_stream->fifo.buffer <<= i_bits;
- return( i_result );
- }
-
- if( p_bit_stream->p_byte <= p_bit_stream->p_end - sizeof(WORD_TYPE) )
- {
- 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 );
- ((WORD_TYPE *)p_bit_stream->p_byte)++;
- i_result |= p_bit_stream->fifo.buffer
- >> (8 * sizeof(WORD_TYPE)
- + p_bit_stream->fifo.i_available);
- p_bit_stream->fifo.buffer <<= ( -p_bit_stream->fifo.i_available );
- p_bit_stream->fifo.i_available += sizeof(WORD_TYPE) * 8;
- return( i_result );
- }
-
- return UnalignedGetBits( p_bit_stream, i_bits );
-}
-
-/*****************************************************************************
- * GetSignedBits : returns i_bits bits from the bit stream and removes them,
- * using signed arithmetic
- * XXX: do not use for 32 bits
- *****************************************************************************/
-static inline s32 GetSignedBits( bit_stream_t * p_bit_stream,
- unsigned int i_bits )
-{
- if( p_bit_stream->fifo.i_available >= i_bits )
- {
- s32 i_result;
-
- p_bit_stream->fifo.i_available -= i_bits;
- i_result = (WORD_SIGNED)p_bit_stream->fifo.buffer
- >> (8 * sizeof(WORD_TYPE) - i_bits);
- p_bit_stream->fifo.buffer <<= i_bits;
- return( i_result );
- }
-
- /* You can probably do something a little faster, but now I'm tired. */
- return( (WORD_SIGNED)(GetBits( p_bit_stream, i_bits ) << (32 - i_bits))
- >> (32 - i_bits) );
-}
-
-/*****************************************************************************
- * GetBits32 : returns 32 bits from the bit stream and removes them
- *****************************************************************************/
-#if (WORD_TYPE == u32)
-static inline u32 GetBits32( bit_stream_t * p_bit_stream )
-{
- u32 i_result;
-
- if( p_bit_stream->fifo.i_available == 32 )
- {
- p_bit_stream->fifo.i_available = 0;
- i_result = p_bit_stream->fifo.buffer;
- p_bit_stream->fifo.buffer = 0;
- return( i_result );
- }
-
- if( p_bit_stream->p_byte <= p_bit_stream->p_end - sizeof(WORD_TYPE) )
- {
- if( p_bit_stream->fifo.i_available )
- {
- i_result = p_bit_stream->fifo.buffer;
- p_bit_stream->fifo.buffer = WORD_AT( p_bit_stream->p_byte );
- ((WORD_TYPE *)p_bit_stream->p_byte)++;
- i_result |= p_bit_stream->fifo.buffer
- >> (p_bit_stream->fifo.i_available);
- p_bit_stream->fifo.buffer <<= (32 - p_bit_stream->fifo.i_available);
- return( i_result );
- }
-
- i_result = WORD_AT( p_bit_stream->p_byte );
- ((WORD_TYPE *)p_bit_stream->p_byte)++;
- return( i_result );
- }
-
- p_bit_stream->fifo.i_available -= 32;
- return UnalignedGetBits( p_bit_stream, 32 );
-}
-#else
-# define GetBits32( p_bit_stream ) GetBits( p_bit_stream, 32 )
-#endif
-
-/*****************************************************************************
- * RealignBits : realigns the bit buffer on an 8-bit boundary
- *****************************************************************************/
-static inline void RealignBits( bit_stream_t * p_bit_stream )
-{
- p_bit_stream->fifo.buffer <<= (p_bit_stream->fifo.i_available & 0x7);
- p_bit_stream->fifo.i_available &= ~0x7;
-}
-
-
-/*****************************************************************************
- * GetChunk : reads a large chunk of data
- *****************************************************************************
- * The position in the stream must be byte-aligned, if unsure call
- * RealignBits(). p_buffer must point to a buffer at least as big as i_buf_len
- * otherwise your code will crash.
- *****************************************************************************/
-static inline void GetChunk( bit_stream_t * p_bit_stream,
- byte_t * p_buffer, size_t i_buf_len )
-{
- ptrdiff_t i_available;
-
- /* We need to take care because i_buf_len may be < 4. */
- while( p_bit_stream->fifo.i_available > 0 && i_buf_len )
- {
- *p_buffer = p_bit_stream->fifo.buffer >> (8 * sizeof(WORD_TYPE) - 8);
- p_buffer++;
- i_buf_len--;
- p_bit_stream->fifo.buffer <<= 8;
- p_bit_stream->fifo.i_available -= 8;
- }
-
- if( (i_available = p_bit_stream->p_end - p_bit_stream->p_byte)
- >= i_buf_len )
- {
- FAST_MEMCPY( p_buffer, p_bit_stream->p_byte, i_buf_len );
- p_bit_stream->p_byte += i_buf_len;
- }
- else
- {
- do
- {
- FAST_MEMCPY( p_buffer, p_bit_stream->p_byte, i_available );
- p_bit_stream->p_byte = p_bit_stream->p_end;
- p_buffer += i_available;
- i_buf_len -= i_available;
- BitstreamNextDataPacket( p_bit_stream );
- if( p_bit_stream->p_decoder_fifo->b_die )
- return;
- }
- while( (i_available = p_bit_stream->p_end - p_bit_stream->p_byte)
- <= i_buf_len );
-
- if( i_buf_len )
- {
- FAST_MEMCPY( p_buffer, p_bit_stream->p_byte, i_buf_len );
- p_bit_stream->p_byte += i_buf_len;
- }
- }
-
- if( p_bit_stream->p_byte <= p_bit_stream->p_end - sizeof(WORD_TYPE) )
- {
- AlignWord( p_bit_stream );
- }
-}
-
-
-/*
- * Communication interface between input and decoders
- */
-
-/*****************************************************************************
- * decoder_config_t
- *****************************************************************************
- * Standard pointers given to the decoders as a toolbox.
- *****************************************************************************/
-typedef struct decoder_config_s
-{
- u16 i_id;
- u8 i_type; /* type of the elementary stream */
-
- void * p_demux_data;
- struct stream_ctrl_s * p_stream_ctrl;
- struct decoder_fifo_s * p_decoder_fifo;
-} decoder_config_t;
-
-/*****************************************************************************
- * Prototypes from input_dec.c
- *****************************************************************************/
-#ifndef __PLUGIN__
-void DecoderError ( struct decoder_fifo_s * p_fifo );
-#else
-# define DecoderError p_symbols->DecoderError
-#endif