added a demux and decoder for flac files (disabled by default). Works for

16bit per sample streams, only tested with stereo

configure.ac.in

@@ -1735,6 +1735,19 @@ dnl
 AC_ARG_ENABLE(dv,
   [  --enable-dv             DV decoder support (default disabled)])
 if test "x${enable_dv}" = "xyes"
+then
+  AC_CHECK_HEADERS(FLAC/stream_decoder.h, [
+    PLUGINS="${PLUGINS} flac flacdec"
+    LDFLAGS_flacdec="${LDFLAGS_flacdec} -lFLAC"
+   ],[])
+fi
+
+dnl
+dnl  DV plugin
+dnl
+AC_ARG_ENABLE(flac,
+  [  --enable-falc         flac decoder support (default disabled)])
+if test "x${enable_flac}" = "xyes"
 then
   AC_CHECK_HEADERS(libdv/dv.h, [
     PLUGINS="${PLUGINS} dv"

modules/codec/Modules.am

 SOURCES_a52 = modules/codec/a52.c
+SOURCES_flacdec = modules/codec/flacdec.c
 SOURCES_lpcm = modules/codec/lpcm.c
 SOURCES_araw = modules/codec/araw.c
 SOURCES_vorbis = modules/codec/vorbis.c

modules/demux/Modules.am

 SOURCES_a52sys = modules/demux/a52sys.c
+SOURCES_flac = modules/demux/flac.c
 SOURCES_ogg = modules/demux/ogg.c
 SOURCES_m3u = modules/demux/m3u.c
 SOURCES_demuxdump = modules/demux/demuxdump.c

modules/demux/flac.c

+/*****************************************************************************
+ * a52sys.c : A/52 input module for vlc
+ *****************************************************************************
+ * Copyright (C) 2001 VideoLAN
+ * $Id: flac.c,v 1.1 2003/02/23 16:31:48 sigmunau 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 1
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int  Init  ( vlc_object_t * );
+static int  Demux ( input_thread_t * );
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+vlc_module_begin();                                      
+    set_description( "flac demuxer" );                       
+    set_capability( "demux", 155 );
+    set_callbacks( Init, NULL );
+    add_shortcut( "flac" );
+vlc_module_end();
+
+/*****************************************************************************
+ * Init: initializes ES structures
+ *****************************************************************************/
+static int Init( vlc_object_t * p_this )
+{
+    input_thread_t *    p_input = (input_thread_t *)p_this;
+    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;
+    }
+
+    p_input->pf_demux = Demux;
+    p_input->pf_rewind = NULL;
+
+    /* Have a peep at the show. */
+    if( input_Peek( p_input, &p_peek, 4 ) < 4 )
+    {
+        /* Stream shorter than 4 bytes... */
+        msg_Err( p_input, "cannot peek()" );
+        return( -1 );
+    }
+
+    if( *p_peek != 'f' || *(p_peek + 1) != 'L' || *(p_peek +2) != 'a'
+        || *(p_peek+3) != 'C')
+    {
+        if( *p_input->psz_demux && !strncmp( p_input->psz_demux, "flac", 4 ) )
+        {
+            /* User forced */
+            msg_Err( p_input, "this doesn't look like an flac stream, continuing" );
+        }
+        else
+        {
+            msg_Warn( p_input, "flac 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_fourcc = VLC_FOURCC('f','l','a','c');
+    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 );
+}
+
+/*****************************************************************************
+ * 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;
+
+    if( p_fifo == NULL )
+    {
+        return -1;
+    }
+
+    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_pes_size = i_read;
+    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;
+}
+