* Makefile, configure.in, configure, MODULES: added a52_system input module.

  * plugins/a52_system/Makefile, plugins/a52_system/a52_system.c: a52 input
    module.
  * plugins/ac3_spdif/ac3_spdif.c: added a little mwait to avoid a flood from
    the a52 input module.

Note: the new module aims at reading ac3 streams but it works only with the
ac3_spdif "decoder" since it is the only one which dates each frame contrary
to the others which can't avoid a flood from the input module.

MODULES

 List of vlc plugins
-$Id: MODULES,v 1.3 2002/01/30 00:09:49 sam Exp $
+$Id: MODULES,v 1.4 2002/06/02 23:43:38 bozo Exp $
+
+ * a52_system: input module for A52 decapsulation.
 
  * ac3_adec: software AC3 decoder.
 

Makefile

@@ -17,6 +17,7 @@ endif
 # All possible plugin directories, needed for make clean
 #
 PLUGINS_DIR :=	a52 \
+		a52_system \
 		aa \
 		ac3_adec \
 		ac3_spdif \
@@ -67,6 +68,7 @@ PLUGINS_DIR :=	a52 \
 
 PLUGINS_TARGETS := a52/a52 \
 		aa/aa \
+		a52_system/a52_system \
 		ac3_adec/ac3_adec \
 		ac3_spdif/ac3_spdif \
 		access/file \

configure

@@ -5472,7 +5472,7 @@ case x"${target_cpu}" in
 esac
 
 BUILTINS="${BUILTINS} idct idctclassic motion imdct downmix mpeg_adec ac3_adec mpeg_vdec"
-PLUGINS="${PLUGINS} dummy null rc logger mpeg_es mpeg_audio mpeg_ps mpeg_ts file udp http ipv4 memcpy lpcm_adec ac3_spdif spudec filter_deinterlace filter_invert filter_wall filter_transform filter_distort filter_clone filter_crop fx_scope chroma_i420_rgb chroma_i420_yuy2 chroma_i422_yuy2 chroma_i420_ymga"
+PLUGINS="${PLUGINS} dummy null rc logger mpeg_es mpeg_audio mpeg_ps mpeg_ts file udp http a52_system ipv4 memcpy lpcm_adec ac3_spdif spudec filter_deinterlace filter_invert filter_wall filter_transform filter_distort filter_clone filter_crop fx_scope chroma_i420_rgb chroma_i420_yuy2 chroma_i422_yuy2 chroma_i420_ymga"
 
 MMX_MODULES="memcpymmx idctmmx motionmmx chroma_i420_rgb_mmx chroma_i420_yuy2_mmx chroma_i422_yuy2_mmx chroma_i420_ymga_mmx"
 MMXEXT_MODULES="memcpymmxext idctmmxext motionmmxext"

configure.in

@@ -413,7 +413,7 @@ dnl
 dnl  default modules
 dnl
 BUILTINS="${BUILTINS} idct idctclassic motion imdct downmix mpeg_adec ac3_adec mpeg_vdec"
-PLUGINS="${PLUGINS} dummy null rc logger mpeg_es mpeg_audio mpeg_ps mpeg_ts file udp http ipv4 memcpy lpcm_adec ac3_spdif spudec filter_deinterlace filter_invert filter_wall filter_transform filter_distort filter_clone filter_crop fx_scope chroma_i420_rgb chroma_i420_yuy2 chroma_i422_yuy2 chroma_i420_ymga"
+PLUGINS="${PLUGINS} dummy null rc logger mpeg_es mpeg_audio mpeg_ps mpeg_ts file udp http a52_system ipv4 memcpy lpcm_adec ac3_spdif spudec filter_deinterlace filter_invert filter_wall filter_transform filter_distort filter_clone filter_crop fx_scope chroma_i420_rgb chroma_i420_yuy2 chroma_i422_yuy2 chroma_i420_ymga"
 
 dnl
 dnl  Accelerated modules

plugins/a52_system/Makefile

+a52_system_SOURCES = a52_system.c
+

plugins/a52_system/a52_system.c

+/*****************************************************************************
+ * a52_system.c : A52 input module for vlc
+ *****************************************************************************
+ * Copyright (C) 2001 VideoLAN
+ * $Id: a52_system.c,v 1.1 2002/06/02 23:43:38 bozo Exp $
+ *
+ * Authors: Arnaud de Bossoreille de Ribou <bozo@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.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include <stdlib.h>                                      /* malloc(), free() */
+#include <string.h>                                              /* strdup() */
+#include <errno.h>
+
+#include <vlc/vlc.h>
+#include <vlc/input.h>
+
+#include <sys/types.h>
+
+/*****************************************************************************
+ * Constants
+ *****************************************************************************/
+#define A52_PACKET_SIZE 16384
+#define MAX_PACKETS_IN_FIFO 3
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static void input_getfunctions( function_list_t * p_function_list );
+static int  Demux         ( struct input_thread_s * );
+static int  Init          ( struct input_thread_s * );
+static void End           ( struct input_thread_s * );
+
+
+/*****************************************************************************
+ * Build configuration tree.
+ *****************************************************************************/
+MODULE_CONFIG_START
+MODULE_CONFIG_STOP
+
+MODULE_INIT_START
+    SET_DESCRIPTION( _("A52 input") )
+    ADD_CAPABILITY( DEMUX, 150 )
+    ADD_SHORTCUT( "a52sys" )
+MODULE_INIT_STOP
+
+MODULE_ACTIVATE_START
+    input_getfunctions( &p_module->p_functions->demux );
+MODULE_ACTIVATE_STOP
+
+MODULE_DEACTIVATE_START
+MODULE_DEACTIVATE_STOP
+
+/*****************************************************************************
+ * Functions exported as capabilities. They are declared as static so that
+ * we don't pollute the namespace too much.
+ *****************************************************************************/
+static void input_getfunctions( function_list_t * p_function_list )
+{
+#define input p_function_list->functions.demux
+    input.pf_init             = Init;
+    input.pf_end              = End;
+    input.pf_demux            = Demux;
+    input.pf_rewind           = NULL;
+#undef input
+}
+
+/*
+ * Data reading functions
+ */
+
+/*****************************************************************************
+ * Init: initializes ES structures
+ *****************************************************************************/
+static int Init( input_thread_t * p_input )
+{
+    es_descriptor_t *   p_es;
+    byte_t *            p_peek;
+
+    /* Initialize access plug-in structures. */
+    if( p_input->i_mtu == 0 )
+    {
+        /* Improve speed. */
+        p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE;
+    }
+
+    /* Have a peep at the show. */
+    if( input_Peek( p_input, &p_peek, 2 ) < 2 )
+    {
+        /* Stream shorter than 4 bytes... */
+        msg_Err( p_input, "cannot peek()" );
+        return( -1 );
+    }
+
+    if( *p_peek != 0x0b || *(p_peek + 1) != 0x77 )
+    {
+        if( *p_input->psz_demux && !strncmp( p_input->psz_demux, "a52sys", 3 ) )
+        {
+            /* User forced */
+            msg_Err( p_input, "this doesn't look like an a52 stream, continuing" );
+        }
+        else
+        {
+            msg_Warn( p_input, "a52 module discarded (no startcode)" );
+            return( -1 );
+        }
+    }
+
+    if( input_InitStream( p_input, 0 ) == -1 )
+    {
+        return( -1 );
+    }
+    input_AddProgram( p_input, 0, 0 );
+    p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
+    vlc_mutex_lock( &p_input->stream.stream_lock );
+    p_es = input_AddES( p_input, p_input->stream.p_selected_program, 0xBD, 0 );
+    p_es->i_stream_id = 0xBD;
+    p_es->i_type = AC3_AUDIO_ES;
+    p_es->i_cat = AUDIO_ES;
+    input_SelectES( p_input, p_es );
+    p_input->stream.p_selected_area->i_tell = 0;
+    p_input->stream.p_selected_program->b_is_ok = 1;
+    vlc_mutex_unlock( &p_input->stream.stream_lock );
+
+    return( 0 );
+}
+
+/*****************************************************************************
+ * End: frees unused data
+ *****************************************************************************/
+static void End( input_thread_t * p_input )
+{
+}
+
+/*****************************************************************************
+ * Demux: reads and demuxes data packets
+ *****************************************************************************
+ * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
+ *****************************************************************************/
+static int Demux( input_thread_t * p_input )
+{
+    ssize_t         i_read;
+    decoder_fifo_t * p_fifo =
+        p_input->stream.p_selected_program->pp_es[0]->p_decoder_fifo;
+    pes_packet_t *  p_pes;
+    data_packet_t * p_data;
+
+    i_read = input_SplitBuffer( p_input, &p_data, A52_PACKET_SIZE );
+
+    if ( i_read <= 0 )
+    {
+        return( i_read );
+    }
+
+    p_pes = input_NewPES( p_input->p_method_data );
+
+    if( p_pes == NULL )
+    {
+        msg_Err( p_input, "out of memory" );
+        input_DeletePacket( p_input->p_method_data, p_data );
+        return( -1 );
+    }
+
+    p_pes->i_rate = p_input->stream.control.i_rate;
+    p_pes->p_first = p_pes->p_last = p_data;
+    p_pes->i_nb_data = 1;
+
+    vlc_mutex_lock( &p_fifo->data_lock );
+    if( p_fifo->i_depth >= MAX_PACKETS_IN_FIFO )
+    {
+        /* Wait for the decoder. */
+        vlc_cond_wait( &p_fifo->data_wait, &p_fifo->data_lock );
+    }
+    vlc_mutex_unlock( &p_fifo->data_lock );
+
+    if( (p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT)
+       |(p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_START)
+         | (input_ClockManageControl( p_input, 
+                      p_input->stream.p_selected_program,
+                         (mtime_t)0 ) == PAUSE_S) )
+    {
+        msg_Warn( p_input, "synchro reinit" );
+        p_pes->i_pts = mdate() + DEFAULT_PTS_DELAY;
+        p_input->stream.p_selected_program->i_synchro_state = SYNCHRO_OK;
+    }
+
+    input_DecodePES( p_fifo, p_pes );
+
+    return( 1 );
+}
+

plugins/ac3_spdif/ac3_spdif.c

@@ -2,7 +2,7 @@
  * ac3_spdif.c: ac3 pass-through to external decoder with enabled soundcard
  *****************************************************************************
  * Copyright (C) 2001 VideoLAN
- * $Id: ac3_spdif.c,v 1.28 2002/06/01 18:04:48 sam Exp $
+ * $Id: ac3_spdif.c,v 1.29 2002/06/02 23:43:38 bozo Exp $
  *
  * Authors: Stphane Borel <stef@via.ecp.fr>
  *          Juha Yrjola <jyrjola@cc.hut.fi>
@@ -200,6 +200,9 @@ static int decoder_Run( decoder_fifo_t * p_fifo )
             i_current_pts += i_frame_time;
         }
 
+        // wait a little to avoid an input flood from the a52 input
+        mwait( i_current_pts - 500000 );
+
         vlc_mutex_lock (&p_spdif->p_aout_fifo->data_lock);
         
         p_spdif->p_aout_fifo->date[p_spdif->p_aout_fifo->i_end_frame] =