+/*****************************************************************************
+ * input_ext-dec.h: structures exported to the VideoLAN decoders
+ *****************************************************************************
+ * Copyright (C) 1999-2001 VideoLAN
+ * $Id: input_ext-dec.h,v 1.83 2003/11/24 00:39:00 fenrir Exp $
+ *
+ * Authors: Christophe Massiot <massiot@via.ecp.fr>
+ * Michel Kaempf <maxx@via.ecp.fr>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ *****************************************************************************/
+
+#ifndef _VLC_INPUT_EXT_DEC_H
+#define _VLC_INPUT_EXT_DEC_H 1
+
/* Structures exported to the decoders */
/*****************************************************************************
*****************************************************************************
* Describe a data packet.
*****************************************************************************/
-typedef struct data_packet_s
+struct data_packet_t
{
- /* Nothing before this line, the code relies on that */
- byte_t * p_buffer; /* raw data packet */
+ /* Used to chain the packets that carry data for a same PES or PSI */
+ data_packet_t * p_next;
- /* Decoders information */
- byte_t * p_payload_start;
- /* start of the PES payload in this packet */
- byte_t * p_payload_end; /* guess ? :-) */
- boolean_t b_discard_payload; /* is the packet messed up ? */
+ /* start of the PS or TS packet */
+ byte_t * p_demux_start;
+ /* start of the PES payload in this packet */
+ byte_t * p_payload_start;
+ byte_t * p_payload_end; /* guess ? :-) */
+ /* is the packet messed up ? */
+ vlc_bool_t b_discard_payload;
- /* Used to chain the TS packets that carry data for a same PES or PSI */
- struct data_packet_s * p_next;
-} data_packet_t;
+ /* pointer to the real data */
+ data_buffer_t * p_buffer;
+};
/*****************************************************************************
* pes_packet_t
* Describes an PES packet, with its properties, and pointers to the TS packets
* containing it.
*****************************************************************************/
-typedef struct pes_packet_s
+struct pes_packet_t
{
+ /* Chained list to the next PES packet (depending on the context) */
+ pes_packet_t * p_next;
+
/* PES properties */
- boolean_t b_messed_up; /* At least one of the data packets
- * has a questionable content */
- boolean_t b_data_alignment; /* used to find the beginning of
- * a video or audio unit */
- boolean_t b_discontinuity; /* This packet doesn't follow the
- * previous one */
+ vlc_bool_t b_data_alignment; /* used to find the beginning of
+ * a video or audio unit */
+ vlc_bool_t b_discontinuity; /* This packet doesn't follow the
+ * previous one */
- boolean_t b_has_pts; /* is the following field set ? */
- mtime_t i_pts; /* the PTS for this packet (if set above) */
+ mtime_t i_pts; /* PTS for this packet (zero if unset) */
+ mtime_t i_dts; /* DTS for this packet (zero if unset) */
+ int i_rate; /* current reading pace (see stream_control.h) */
- int i_pes_size; /* size of the current PES packet */
+ unsigned int i_pes_size; /* size of the current PES packet */
- /* Pointers to packets (packets are then linked by the p_prev and
- p_next fields of the data_packet_t struct) */
- data_packet_t * p_first; /* The first packet containing this
+ /* Chained list to packets */
+ data_packet_t * p_first; /* The first packet contained by this
* PES (used by decoders). */
-} pes_packet_t;
-
-/*****************************************************************************
- * decoder_fifo_t
- *****************************************************************************
- * This rotative FIFO contains PES packets that are to be decoded.
- *****************************************************************************/
-typedef struct decoder_fifo_s
-{
- /* Thread structures */
- vlc_mutex_t data_lock; /* fifo data lock */
- vlc_cond_t data_wait; /* fifo data conditional variable */
-
- /* Data */
- pes_packet_t * buffer[FIFO_SIZE + 1];
- int i_start;
- int i_end;
-
- /* Communication interface between input and decoders */
- boolean_t b_die; /* the decoder should return now */
- void * p_packets_mgt; /* packets management services
- * data (netlist...) */
- void (* pf_delete_pes)( void *, pes_packet_t * );
- /* function to use when releasing a PES */
-} decoder_fifo_t;
-
-/* Macros to manage a decoder_fifo_t structure. Please remember to take
- * data_lock before using them. */
-#define DECODER_FIFO_ISEMPTY( fifo ) ( (fifo).i_start == (fifo).i_end )
-#define DECODER_FIFO_ISFULL( fifo ) ( ( ((fifo).i_end + 1 - (fifo).i_start)\
- & FIFO_SIZE ) == 0 )
-#define DECODER_FIFO_START( fifo ) ( (fifo).buffer[ (fifo).i_start ] )
-#define DECODER_FIFO_INCSTART( fifo ) ( (fifo).i_start = ((fifo).i_start + 1)\
- & FIFO_SIZE )
-#define DECODER_FIFO_END( fifo ) ( (fifo).buffer[ (fifo).i_end ] )
-#define DECODER_FIFO_INCEND( fifo ) ( (fifo).i_end = ((fifo).i_end + 1) \
- & FIFO_SIZE )
-
-/*****************************************************************************
- * bit_fifo_t : bit fifo descriptor
- *****************************************************************************
- * This type describes a bit fifo used to store bits while working with the
- * input stream at the bit level.
- *****************************************************************************/
-typedef u32 WORD_TYPE; /* only u32 is supported at the moment */
-
-typedef struct bit_fifo_s
-{
- /* This unsigned integer allows us to work at the bit level. This buffer
- * can contain 32 bits, and the used space can be found on the MSb's side
- * and the available space on the LSb's side. */
- WORD_TYPE buffer;
-
- /* Number of bits available in the bit buffer */
- int i_available;
-
-} bit_fifo_t;
-
-/*****************************************************************************
- * bit_stream_t : bit stream descriptor
- *****************************************************************************
- * This type, based on a PES stream, includes all the structures needed to
- * handle the input stream like a bit stream.
- *****************************************************************************/
-typedef struct bit_stream_s
-{
- /*
- * Input structures
- */
- /* The decoder fifo contains the data of the PES stream */
- decoder_fifo_t * p_decoder_fifo;
-
- /* Function to jump to the next data packet */
- void (* pf_next_data_packet)( struct bit_stream_s * );
-
- /*
- * Byte structures
- */
- /* Current data packet (in the current PES packet of the PES stream) */
- data_packet_t * p_data;
- /* Pointer to the next byte that is to be read (in the current TS packet) */
- byte_t * p_byte;
- /* Pointer to the last byte that is to be read (in the current TS packet */
- byte_t * p_end;
-
- /*
- * Bit structures
- */
- bit_fifo_t fifo;
-} bit_stream_t;
-
-/*****************************************************************************
- * Inline functions used by the decoders to read bit_stream_t
- *****************************************************************************/
-
-/*
- * Philosophy of the first implementation : the bit buffer is first filled by
- * NeedBits, then the buffer can be read via p_bit_stream->fifo.buffer, and
- * unnecessary bits are dumped with a DumpBits() call.
- */
-
-/*****************************************************************************
- * GetByte : reads the next byte in the input stream
- *****************************************************************************/
-static __inline__ byte_t GetByte( bit_stream_t * p_bit_stream )
-{
- /* Are there some bytes left in the current data packet ? */
- /* could change this test to have a if (! (bytes--)) instead */
- if ( p_bit_stream->p_byte >= p_bit_stream->p_end )
- {
- /* no, switch to next data packet */
- p_bit_stream->pf_next_data_packet( p_bit_stream );
- }
-
- return( *(p_bit_stream->p_byte++) );
-}
-
-/*****************************************************************************
- * NeedBits : reads i_bits new bits in the bit stream and stores them in the
- * bit buffer
- *****************************************************************************
- * - i_bits must be less or equal 32 !
- * - There is something important to notice with that function : if the number
- * of bits available in the bit buffer when calling NeedBits() is greater than
- * 24 (i_available > 24) but less than the number of needed bits
- * (i_available < i_bits), the byte returned by GetByte() will be shifted with
- * a negative value and the number of bits available in the bit buffer will be
- * set to more than 32 !
- *****************************************************************************/
-static __inline__ void NeedBits( bit_stream_t * p_bit_stream, int i_bits )
-{
- while ( p_bit_stream->fifo.i_available < i_bits )
- {
- p_bit_stream->fifo.buffer |= ((WORD_TYPE)GetByte( p_bit_stream ))
- << (sizeof(WORD_TYPE) - 8
- - p_bit_stream->fifo.i_available);
- p_bit_stream->fifo.i_available += 8;
- }
-}
-
-/*****************************************************************************
- * DumpBits : removes i_bits bits from the bit buffer
- *****************************************************************************
- * - i_bits <= i_available
- * - i_bits < 32 (because (u32 << 32) <=> (u32 = u32))
- *****************************************************************************/
-static __inline__ void DumpBits( bit_stream_t * p_bit_stream, int i_bits )
-{
- p_bit_stream->fifo.buffer <<= i_bits;
- p_bit_stream->fifo.i_available -= i_bits;
-}
-
-
-/*
- * Philosophy of the second implementation : WORD_LENGTH (usually 32) bits
- * are read at the same time, thus minimizing the number of p_byte changes.
- * Bits are read via GetBits() or ShowBits. This is slightly faster. Be
- * aware that if, in the forthcoming functions, i_bits > 24, the data have to
- * be already aligned on an 8-bit boundary, or wrong results will be
- * returned.
- */
-
-#if (WORD_TYPE != u32)
-# error Not supported word
-#endif
-
-/*
- * This is stolen from the livid source who stole it from the kernel
- * FIXME: The macro swab32 for little endian machines does
- * not seem to work correctly
- */
-
-#if defined(SYS_BEOS)
-# define swab32(x) B_BENDIAN_TO_HOST_INT32(x)
-#else
-# if __BYTE_ORDER == __BIG_ENDIAN
-# define swab32(x) (x)
-# else
-# if defined (__i386__)
-static __inline__ const u32 __i386_swab32( u32 x )
-{
- __asm__("bswap %0" : "=r" (x) : "0" (x));
- return x;
-}
-# define swab32(x) __i386_swab32(x)
-# else
-# define swab32(x) \
- ( ( (u32)(((u8*)&x)[0]) << 24 ) | ( (u32)(((u8*)&x)[1]) << 16 ) |\
- ( (u32)(((u8*)&x)[2]) << 8 ) | ( (u32)(((u8*)&x)[3])) )
-# endif
-# endif
-#endif
+ data_packet_t * p_last; /* The last packet contained by this
+ * PES (used by the buffer allocator) */
+ unsigned int i_nb_data; /* Number of data packets in the chained list */
+};
/*****************************************************************************
- * ShowBits : return i_bits bits from the bit stream
+ * Prototypes from input_ext-dec.c
*****************************************************************************/
-static __inline__ WORD_TYPE ShowWord( bit_stream_t * p_bit_stream )
-{
- if( p_bit_stream->p_byte <= p_bit_stream->p_end - sizeof(WORD_TYPE) )
- {
- return( swab32( *((WORD_TYPE *)p_bit_stream->p_byte) ) );
- }
-
- p_bit_stream->pf_next_data_packet( p_bit_stream );
- return( swab32( *((WORD_TYPE *)p_bit_stream->p_byte) ) );
-}
-
-static __inline__ WORD_TYPE ShowBits( bit_stream_t * p_bit_stream, int i_bits )
-{
- if( p_bit_stream->fifo.i_available >= i_bits )
- {
- return( p_bit_stream->fifo.buffer >> (8 * sizeof(WORD_TYPE) - i_bits) );
- }
-
- return( (p_bit_stream->fifo.buffer |
- (ShowWord( p_bit_stream ) >> p_bit_stream->fifo.i_available))
- >> (8 * sizeof(WORD_TYPE) - i_bits) );
-}
-
-/*****************************************************************************
- * GetWord : returns the next word to be read
- *****************************************************************************/
-static __inline__ WORD_TYPE GetWord( bit_stream_t * p_bit_stream )
-{
- if( p_bit_stream->p_byte <= p_bit_stream->p_end - sizeof(WORD_TYPE) )
- {
- return( swab32( *(((WORD_TYPE *)p_bit_stream->p_byte)++) ) );
- }
- else
- {
- p_bit_stream->pf_next_data_packet( p_bit_stream );
- return( swab32( *(((WORD_TYPE *)p_bit_stream->p_byte)++) ) );
- }
-}
-
-/*****************************************************************************
- * RemoveBits : removes i_bits bits from the bit buffer
- *****************************************************************************/
-static __inline__ void RemoveBits( bit_stream_t * p_bit_stream, 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;
- }
- p_bit_stream->fifo.buffer = GetWord( p_bit_stream )
- << ( -p_bit_stream->fifo.i_available );
- p_bit_stream->fifo.i_available += sizeof(WORD_TYPE) * 8;
-}
-
-/*****************************************************************************
- * RemoveBits32 : removes 32 bits from the bit buffer (and as a side effect,
- * refill it). This should be faster than RemoveBits, though
- * RemoveBits will work, too.
- *****************************************************************************/
-static __inline__ void RemoveBits32( bit_stream_t * p_bit_stream )
-{
- p_bit_stream->fifo.buffer = GetWord( p_bit_stream )
- << (32 - p_bit_stream->fifo.i_available);
-}
-
-/*****************************************************************************
- * GetBits : returns i_bits bits from the bit stream and removes them
- *****************************************************************************/
-static __inline__ WORD_TYPE GetBits( bit_stream_t * p_bit_stream, 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 );
- }
-
- i_result = p_bit_stream->fifo.buffer >> (8 * sizeof(WORD_TYPE) - i_bits);
- p_bit_stream->fifo.buffer = GetWord( p_bit_stream );
- 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 );
-}
-
-/*****************************************************************************
- * GetBits32 : returns 32 bits from the bit stream and removes them
- *****************************************************************************/
-static __inline__ WORD_TYPE GetBits32( bit_stream_t * p_bit_stream )
-{
- WORD_TYPE i_result;
-
- i_result = p_bit_stream->fifo.buffer;
- p_bit_stream->fifo.buffer = GetWord( p_bit_stream );
- i_result |= p_bit_stream->fifo.buffer
- >> (p_bit_stream->fifo.i_available);
- p_bit_stream->fifo.buffer <<= (8 * sizeof(WORD_TYPE)
- - p_bit_stream->fifo.i_available);
-
- return( i_result );
-}
-
-/*****************************************************************************
- * 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;
-}
-
-
-/*
- * 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_stream_id;
- u8 i_type; /* type of the elementary stream */
-
- struct stream_ctrl_s * p_stream_ctrl;
- struct decoder_fifo_s * p_decoder_fifo;
- void (* pf_init_bit_stream)( struct bit_stream_s *,
- struct decoder_fifo_s * );
-} decoder_config_t;
-
-/*****************************************************************************
- * vdec_config_t
- *****************************************************************************
- * Pointers given to video decoders threads.
- *****************************************************************************/
-struct vout_thread_s;
-
-typedef struct vdec_config_s
-{
- struct vout_thread_s * p_vout;
-
- struct picture_s * (* pf_create_picture)( struct vout_thread_s *,
- int i_type, int i_width,
- int i_height );
- void (* pf_destroy_picture)( struct vout_thread_s *,
- struct picture_s * );
- void (* pf_display_picture)( struct vout_thread_s *,
- struct picture_s * );
- void (* pf_date_picture)( struct vout_thread_s *,
- struct picture_s *, mtime_t date );
- void (* pf_link_picture)( struct vout_thread_s *,
- struct picture_s *, mtime_t date );
- void (* pf_unlink_picture)( struct vout_thread_s *,
- struct picture_s *, mtime_t date );
- struct subpicture_s *(* pf_create_subpicture)( struct vout_thread_s *,
- int i_type, int i_size );
- void (* pf_destroy_subpicture)( struct vout_thread_s *,
- struct subpicture_s * );
- void (* pf_display_subpicture)( struct vout_thread_s *,
- struct subpicture_s * );
-
- decoder_config_t decoder_config;
-} vdec_config_t;
-
-/*****************************************************************************
- * adec_config_t
- *****************************************************************************
- * Pointers given to audio decoders threads.
- *****************************************************************************/
-struct aout_thread_s;
-
-typedef struct adec_config_s
-{
- struct aout_thread_s * p_aout;
-
- struct aout_fifo_s * (* pf_create_fifo)( struct aout_thread_s *,
- struct aout_fifo_s * );
- void (* pf_destroy_fifo)( struct aout_thread_s *);
-
- decoder_config_t decoder_config;
-} adec_config_t;
-
-
-/*
- * Communication interface between decoders and input
- */
-
-/*****************************************************************************
- * decoder_capabilities_t
- *****************************************************************************
- * Structure returned by a call to GetCapabilities() of the decoder.
- *****************************************************************************/
-typedef struct decoder_capabilities_s
-{
- int i_dec_type;
- u8 i_stream_type; /* == i_type in es_descriptor_t */
- int i_weight; /* for a given stream type, the decoder
- * with higher weight will be spawned */
-
- vlc_thread_t (* pf_create_thread)( struct decoder_config_s * );
-} decoder_capabilities_t;
+VLC_EXPORT( void, input_DeletePES, ( input_buffers_t *, pes_packet_t * ) );
-/* Decoder types */
-#define NONE_D 0
-#define VIDEO_D 1
-#define AUDIO_D 2
+#endif /* "input_ext-dec.h" */
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