* all: make stream_t using function pointers (needed to have multiple

 implementations, not yet used).

include/input_ext-intf.h

@@ -4,7 +4,7 @@
  * control the pace of reading.
  *****************************************************************************
  * Copyright (C) 1999, 2000, 2003 VideoLAN
- * $Id: input_ext-intf.h,v 1.102 2003/12/03 13:27:51 rocky Exp $
+ * $Id: input_ext-intf.h,v 1.103 2004/01/26 20:48:09 fenrir Exp $
  *
  * Authors: Christophe Massiot <massiot@via.ecp.fr>
  *
@@ -26,6 +26,7 @@
 #ifndef _VLC_INPUT_EXT_INTF_H
 #define _VLC_INPUT_EXT_INTF_H 1
 
+#include "vlc_block.h"
 #include "ninput.h"
 
 /*
@@ -237,9 +238,8 @@ struct stream_descriptor_t
     int                     b_new_mute;          /* int because it can be -1 */
     vlc_cond_t              stream_wait; /* interface -> input in case of a
                                           * status change request            */
-
     /* Demultiplexer data */
-    stream_sys_t *          p_demux_data;
+    void *                  p_demux_data;
 
     /* Programs descriptions */
     unsigned int            i_pgrm_number;    /* size of the following array */

include/input_ext-plugins.h

@@ -3,7 +3,7 @@
  *                      but exported to plug-ins
  *****************************************************************************
  * Copyright (C) 1999-2002 VideoLAN
- * $Id: input_ext-plugins.h,v 1.46 2003/11/30 22:47:55 gbazin Exp $
+ * $Id: input_ext-plugins.h,v 1.47 2004/01/26 20:48:09 fenrir Exp $
  *
  * Authors: Christophe Massiot <massiot@via.ecp.fr>
  *
@@ -71,6 +71,9 @@ void input_EscapeAudioDiscontinuity( input_thread_t * );
 es_out_t *input_EsOutNew( input_thread_t * );
 void      input_EsOutDelete( es_out_t * );
 
+stream_t *input_StreamNew( input_thread_t * );
+void      input_StreamDelete( stream_t * );
+
 /*****************************************************************************
  * Prototypes from input_clock.c
  *****************************************************************************/

include/ninput.h

@@ -2,7 +2,7 @@
  * ninput.h
  *****************************************************************************
  * Copyright (C) 1999-2001 VideoLAN
- * $Id: ninput.h,v 1.25 2004/01/21 17:01:54 fenrir Exp $
+ * $Id: ninput.h,v 1.26 2004/01/26 20:48:09 fenrir Exp $
  *
  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
  *
@@ -121,41 +121,121 @@ enum stream_query_e
     STREAM_GET_MTU,             /**< arg1= int *          res=cannot fail (0 if no sense)*/
 };
 
-/* Stream */
-VLC_EXPORT( stream_t *,     stream_OpenInput,       ( input_thread_t * ) );
-VLC_EXPORT( void,           stream_Release,         ( stream_t * ) );
-VLC_EXPORT( int,            stream_vaControl,       ( stream_t *, int i_query, va_list ) );
-VLC_EXPORT( int,            stream_Control,         ( stream_t *, int i_query, ... ) );
-VLC_EXPORT( int,            stream_Read,            ( stream_t *, void *p_read, int i_read ) );
-VLC_EXPORT( int,            stream_Peek,            ( stream_t *, uint8_t **pp_peek, int i_peek ) );
-VLC_EXPORT( char *,         stream_ReadLine,        ( stream_t * ) );
-VLC_EXPORT( block_t *,      stream_Block,           ( stream_t *, int i_size ) );
+/**
+ * stream_t definition
+ */
+struct stream_t
+{
+    VLC_COMMON_MEMBERS
+
+    block_t *(*pf_block)  ( stream_t *, int i_size );
+    int      (*pf_read)   ( stream_t *, void *p_read, int i_read );
+    int      (*pf_peek)   ( stream_t *, uint8_t **pp_peek, int i_peek );
+    int      (*pf_control)( stream_t *, int i_query, va_list );
 
-static int64_t inline stream_Tell( stream_t *s )
+    stream_sys_t    *p_sys;
+};
+
+/**
+ * Try to read "i_read" bytes into a buffer pointed by "p_read".  If
+ * "p_read" is NULL then data are skipped instead of read.  The return
+ * value is the real numbers of bytes read/skip. If this value is less
+ * than i_read that means that it's the end of the stream.
+ */
+static inline int stream_Read( stream_t *s, void *p_read, int i_read )
+{
+    return s->pf_read( s, p_read, i_read );
+}
+
+/**
+ * Store in pp_peek a pointer to the next "i_peek" bytes in the stream
+ * \return The real numbers of valid bytes, if it's less
+ * or equal to 0, *pp_peek is invalid.
+ * \note pp_peek is a pointer to internal buffer and it will be invalid as
+ * soons as other stream_* functions are called.
+ * \note Due to input limitation, it could be less than i_peek without meaning
+ * the end of the stream (but only when you have i_peek >=
+ * p_input->i_bufsize)
+ */
+static inline int stream_Peek( stream_t *s, uint8_t **pp_peek, int i_peek )
+{
+    return s->pf_peek( s, pp_peek, i_peek );
+}
+
+/**
+ * Use to control the "stream_t *". Look at #stream_query_e for
+ * possible "i_query" value and format arguments.  Return VLC_SUCCESS
+ * if ... succeed ;) and VLC_EGENERIC if failed or unimplemented
+ */
+static inline int stream_vaControl( stream_t *s, int i_query, va_list args )
+{
+    return s->pf_control( s, i_query, args );
+}
+static inline int stream_Control( stream_t *s, int i_query, ... )
+{
+    va_list args;
+    int     i_result;
+
+    va_start( args, i_query );
+    i_result = s->pf_control( s, i_query, args );
+    va_end( args );
+    return i_result;
+}
+static inline int64_t stream_Tell( stream_t *s )
 {
     int64_t i_pos;
     stream_Control( s, STREAM_GET_POSITION, &i_pos );
-
     return i_pos;
 }
-static int64_t inline stream_Size( stream_t *s )
+static inline int64_t stream_Size( stream_t *s )
 {
     int64_t i_pos;
     stream_Control( s, STREAM_GET_SIZE, &i_pos );
-
     return i_pos;
 }
-static int inline stream_MTU( stream_t *s )
+static inline int stream_MTU( stream_t *s )
 {
     int i_mtu;
-    return stream_Control( s, STREAM_GET_POSITION, &i_mtu );
+    stream_Control( s, STREAM_GET_MTU, &i_mtu );
+    return i_mtu;
 }
-
-static int inline stream_Seek( stream_t *s, int64_t i_pos )
+static inline int stream_Seek( stream_t *s, int64_t i_pos )
 {
     return stream_Control( s, STREAM_SET_POSITION, i_pos );
 }
 
+/**
+ * Read "i_size" bytes and store them in a block_t. If less than "i_size"
+ * bytes are available then return what is left and if nothing is availble,
+ * return NULL.
+ */
+static inline block_t *stream_Block( stream_t *s, int i_size )
+{
+    if( i_size <= 0 ) return NULL;
+
+    if( s->pf_block )
+    {
+        return s->pf_block( s, i_size );
+    }
+    else
+    {
+        /* emulate block read */
+        block_t *p_bk = block_New( s, i_size );
+        if( p_bk )
+        {
+            p_bk->i_buffer = stream_Read( s, p_bk->p_buffer, i_size );
+            if( p_bk->i_buffer > 0 )
+            {
+                return p_bk;
+            }
+        }
+        if( p_bk ) block_Release( p_bk );
+        return NULL;
+    }
+}
+
+VLC_EXPORT( char *, stream_ReadLine, ( stream_t * ) );
+
 /**
  * @}
  */
@@ -165,7 +245,6 @@ static int inline stream_Seek( stream_t *s, int64_t i_pos )
  * @{
  */
 
-
 struct demux_t
 {
     VLC_COMMON_MEMBERS

include/vlc_common.h

@@ -3,7 +3,7 @@
  * Collection of useful common types and macros definitions
  *****************************************************************************
  * Copyright (C) 1998, 1999, 2000 VideoLAN
- * $Id: vlc_common.h,v 1.105 2004/01/25 21:39:37 gbazin Exp $
+ * $Id: vlc_common.h,v 1.106 2004/01/26 20:48:09 fenrir Exp $
  *
  * Authors: Samuel Hocevar <sam@via.ecp.fr>
  *          Vincent Seguin <seguin@via.ecp.fr>
@@ -222,7 +222,6 @@ typedef struct es_sys_t es_sys_t;
 typedef struct pgrm_descriptor_t pgrm_descriptor_t;
 typedef struct pgrm_sys_t pgrm_sys_t;
 typedef struct stream_descriptor_t stream_descriptor_t;
-typedef struct stream_sys_t stream_sys_t;
 
 /* Format */
 typedef struct audio_format_t audio_format_t;
@@ -232,6 +231,7 @@ typedef struct es_format_t es_format_t;
 typedef struct video_palette_t video_palette_t;
 
 /* NInput */
+typedef struct stream_sys_t stream_sys_t;
 typedef struct stream_t     stream_t;
 typedef struct es_out_t     es_out_t;
 typedef struct es_out_id_t  es_out_id_t;

src/input/input.c

@@ -4,7 +4,7 @@
  * decoders.
  *****************************************************************************
  * Copyright (C) 1998-2004 VideoLAN
- * $Id: input.c,v 1.279 2004/01/26 20:26:54 gbazin Exp $
+ * $Id: input.c,v 1.280 2004/01/26 20:48:10 fenrir Exp $
  *
  * Authors: Christophe Massiot <massiot@via.ecp.fr>
  *
@@ -736,7 +736,7 @@ static int InitThread( input_thread_t * p_input )
     }
 
     /* Create the stream_t facilities */
-    p_input->s = stream_OpenInput( p_input );
+    p_input->s = input_StreamNew( p_input );
     if( p_input->s == NULL )
     {
         /* should never occur yet */
@@ -768,7 +768,7 @@ static int InitThread( input_thread_t * p_input )
         msg_Err( p_input, "no suitable demux module for `%s/%s://%s'",
                  p_input->psz_access, p_input->psz_demux, p_input->psz_name );
 
-        stream_Release( p_input->s );
+        input_StreamDelete( p_input->s );
         module_Unneed( p_input, p_input->p_access );
         if ( p_input->stream.p_sout != NULL )
         {
@@ -945,7 +945,7 @@ static void EndThread( input_thread_t * p_input )
     }
 
     /* Destroy the stream_t facilities */
-    if( p_input->s ) stream_Release( p_input->s );
+    if( p_input->s ) input_StreamDelete( p_input->s );
 
     /* Destroy es out */
     if( p_input->p_es_out ) input_EsOutDelete( p_input->p_es_out );