/*****************************************************************************
* 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 $
+ * Copyright (C) 1999-2001 VideoLAN
+ * $Id: input_ext-dec.h,v 1.83 2003/11/24 00:39:00 fenrir Exp $
*
- * Authors:
+ * 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
* 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 */
- mtime_t i_pts;/* the PTS for this packet (zero if unset) */
- mtime_t i_dts;/* the DTS for this packet (zero if unset) */
+ 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 contained by 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 */
- boolean_t b_error; /* the decoder is in an error loop */
- 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;
-
-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
-{
- /*
- * Bit structures
- */
- bit_fifo_t fifo;
-
- /*
- * 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 * );
-
- /* Callback to the decoder used when changing data packets ; set
- * to NULL if your decoder doesn't need it. */
- void (* pf_bitstream_callback)( struct bit_stream_s *,
- boolean_t b_new_pes );
- /* Optional argument to the callback */
- void * p_callback_arg;
-
- /*
- * 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_stream_t;
-
-/*****************************************************************************
- * Inline functions used by the decoders to read bit_stream_t
- *****************************************************************************/
-
-/*
- * DISCUSSION : How to use the bit_stream structures
- *
- * sizeof(WORD_TYPE) (usually 32) bits are read at the same time, thus
- * minimizing the number of p_byte changes.
- * Bits are read via GetBits() or ShowBits.
- *
- * XXX : 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. Use RealignBits() if unsure.
- */
-
-#if (WORD_TYPE == u32)
-# define WORD_AT U32_AT
-#elif (WORD_TYPE == u64)
-# define WORD_AT U64_AT
-#else
-# error Unsupported WORD_TYPE
-#endif
-
-/*****************************************************************************
- * Protoypes from input_ext-dec.c
- *****************************************************************************/
-u32 UnalignedShowBits( struct bit_stream_s *, unsigned int );
-void UnalignedRemoveBits( struct bit_stream_s * );
-u32 UnalignedGetBits( struct bit_stream_s *, unsigned int );
-
-/*****************************************************************************
- * 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( (p_bit_stream->p_byte - p_bit_stream->p_data->p_buffer)
- & (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
- {
- p_bit_stream->pf_next_data_packet( 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 );
-}
-
-/*****************************************************************************
- * 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
+ 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 */
+};
/*****************************************************************************
- * GetBits : returns i_bits bits from the bit stream and removes them
- * XXX: do not use for 32 bits, see GetBits32
+ * Prototypes from input_ext-dec.c
*****************************************************************************/
-static __inline__ u32 GetBits( bit_stream_t * p_bit_stream,
- unsigned int i_bits )
-{
- u32 i_result;
-
- if( p_bit_stream->fifo.i_available >= i_bits )
- {
- 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;
- return( i_result );
- }
-
- 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 );
- ((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 );
-}
-
-/*****************************************************************************
- * 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 );
- }
-
- 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 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;
-
- if( p_bit_stream->fifo.i_available )
- {
- *((WORD_TYPE *)p_buffer) = WORD_AT( &p_bit_stream->fifo.buffer );
- p_buffer += p_bit_stream->fifo.i_available >> 3;
- i_buf_len -= p_bit_stream->fifo.i_available >> 3;
- p_bit_stream->fifo.buffer = 0;
- p_bit_stream->fifo.i_available = 0;
- }
-
- if( (i_available = p_bit_stream->p_end - p_bit_stream->p_byte)
- >= i_buf_len )
- {
- memcpy( p_buffer, p_bit_stream->p_byte, i_buf_len );
- p_bit_stream->p_byte += i_buf_len;
- }
- else
- {
- do
- {
- 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;
- p_bit_stream->pf_next_data_packet( p_bit_stream );
- }
- while( (i_available = p_bit_stream->p_end - p_bit_stream->p_byte)
- <= i_buf_len && !p_bit_stream->p_decoder_fifo->b_die );
-
- if( i_buf_len )
- {
- 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 );
- }
-}
-
-
-/*
- * The following functions are now deprecated.
- */
-
-static __inline__ byte_t _GetByte( bit_stream_t * p_bit_stream )
-{
- if ( p_bit_stream->p_byte >= p_bit_stream->p_end )
- {
- p_bit_stream->pf_next_data_packet( p_bit_stream );
- }
-
- return( *(p_bit_stream->p_byte++) );
-}
-
-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 ))
- << (8 * sizeof(WORD_TYPE) - 8
- - p_bit_stream->fifo.i_available);
- p_bit_stream->fifo.i_available += 8;
- }
-}
-
-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;
-}
-
-
-/*
- * 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 */
-
- 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)( void * );
-} 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" */
projects / vlc / blobdiff