--- /dev/null
+/*****************************************************************************
+ * rawaud.c : raw audio input module for vlc
+ *****************************************************************************
+ * Copyright (C) 2009 the VideoLAN team
+ * $Id$
+ *
+ * Authors: Jarmo Torvinen <jarmo.torvinen@jutel.fi>
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_demux.h>
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+static int Open ( vlc_object_t * );
+static void Close( vlc_object_t * );
+
+
+#define SAMPLERATE_TEXT N_("Audio samplerate (Hz)")
+#define SAMPLERATE_LONGTEXT N_("Audio sample rate in Hertz. Default is 48000 Hz.")
+
+#define CHANNELS_TEXT N_("Audio channels")
+#define CHANNELS_LONGTEXT N_("Audio channels in input stream. Numeric value >0. Default is 2.")
+
+#define FOURCC_TEXT N_("FOURCC code of raw input format")
+#define FOURCC_LONGTEXT N_( \
+ "FOURCC code of the raw input format. This is a four character string. Default is s16l." )
+
+#define LANG_TEXT N_("Forces the audio language.")
+#define LANG_LONGTEXT N_("Forces the audio language for the output mux. Three letter ISO639 code. Default is 'eng'. ")
+
+vlc_module_begin();
+ set_shortname( "Raw Audio" );
+ set_description( N_("Raw audio demuxer") );
+ set_capability( "demux", 0 );
+ set_category( CAT_INPUT );
+ set_subcategory( SUBCAT_INPUT_DEMUX );
+ set_callbacks( Open, Close );
+ add_shortcut( "rawaud" );
+ add_integer( "rawaud-channels", 2, 0, CHANNELS_TEXT, CHANNELS_LONGTEXT, false );
+ add_integer( "rawaud-samplerate", 48000, 0, SAMPLERATE_TEXT, SAMPLERATE_LONGTEXT, false );
+ add_string( "rawaud-fourcc", "s16l", NULL, FOURCC_TEXT, FOURCC_LONGTEXT, false );
+ add_string( "rawaud-lang", "eng", NULL, LANG_TEXT, LANG_LONGTEXT, false);
+vlc_module_end();
+
+/*****************************************************************************
+ * Definitions of structures used by this plugin
+ *****************************************************************************/
+struct demux_sys_t
+{
+ es_out_id_t *p_es;
+ es_format_t fmt;
+ unsigned int i_frame_size;
+ unsigned int i_frame_samples;
+ unsigned int i_seek_step;
+ date_t pts;
+};
+
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int Demux( demux_t * );
+static int Control( demux_t *, int i_query, va_list args );
+
+
+/*****************************************************************************
+ * Open: initializes raw audio demuxer
+ *****************************************************************************/
+static int Open( vlc_object_t * p_this )
+{
+ demux_t *p_demux = (demux_t*)p_this;
+ demux_sys_t *p_sys;
+
+ /* Set p_input field */
+ p_demux->pf_demux = Demux;
+ p_demux->pf_control = Control;
+ p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
+ if( !p_sys )
+ return VLC_ENOMEM;
+
+ es_format_Init( &p_sys->fmt, AUDIO_ES, 0 );
+
+ char *psz_fourcc = var_CreateGetString( p_demux, "rawaud-fourcc" );
+
+ if( ( psz_fourcc == NULL ? 0 : strlen( psz_fourcc ) ) != 4 )
+ {
+ msg_Err( p_demux, "rawaud-fourcc must be a 4 character string");
+ free( psz_fourcc );
+ es_format_Clean( &p_sys->fmt );
+ free( p_sys );
+ return VLC_EGENERIC;
+ }
+
+ p_sys->fmt.i_codec = VLC_FOURCC( psz_fourcc[0], psz_fourcc[1],
+ psz_fourcc[2], psz_fourcc[3] );
+
+ free( psz_fourcc );
+ // get the bits per sample ratio based on codec
+ switch( p_sys->fmt.i_codec )
+ {
+
+ case VLC_FOURCC( 'f', 'l', '6', '4' ):
+ p_sys->fmt.audio.i_bitspersample = 64;
+ break;
+
+ case VLC_FOURCC( 'f', 'l', '3', '2' ):
+ case VLC_FOURCC( 's', '3', '2', 'l' ):
+ case VLC_FOURCC( 's', '3', '2', 'b' ):
+ case VLC_FOURCC( 'i', 'n', '3', '2' ):
+ p_sys->fmt.audio.i_bitspersample = 32;
+ break;
+
+ case VLC_FOURCC( 's', '2', '4', 'l' ):
+ case VLC_FOURCC( 's', '2', '4', 'b' ):
+ case VLC_FOURCC( 'i', 'n', '2', '4' ):
+ case VLC_FOURCC( '4', '2', 'n', 'i' ):
+ p_sys->fmt.audio.i_bitspersample = 24;
+ break;
+
+ case VLC_FOURCC( 's', '1', '6', 'l' ):
+ case VLC_FOURCC( 's', '1', '6', 'b' ):
+ p_sys->fmt.audio.i_bitspersample = 16;
+ break;
+
+ case VLC_FOURCC( 's', '8', ' ', ' ' ):
+ case VLC_FOURCC( 'u', '8', ' ', ' ' ):
+ p_sys->fmt.audio.i_bitspersample = 8;
+ break;
+
+ default:
+ msg_Err( p_demux, "unknown fourcc format %4.4s",
+ (char *)&p_sys->fmt.i_codec);
+ es_format_Clean( &p_sys->fmt );
+ free( p_sys );
+ return VLC_EGENERIC;
+
+ }
+
+
+ p_sys->fmt.psz_language = var_CreateGetString( p_demux, "rawaud-lang" );
+ p_sys->fmt.audio.i_channels = var_CreateGetInteger( p_demux, "rawaud-channels" );
+ p_sys->fmt.audio.i_rate = var_CreateGetInteger( p_demux, "rawaud-samplerate" );
+
+ if( p_sys->fmt.audio.i_rate <= 0 )
+ {
+ msg_Err( p_demux, "invalid sample rate");
+ es_format_Clean( &p_sys->fmt );
+ free( p_sys );
+ return VLC_EGENERIC;
+ }
+
+ if( p_sys->fmt.audio.i_channels <= 0 )
+ {
+ msg_Err( p_demux, "invalid number of channels");
+ es_format_Clean( &p_sys->fmt );
+ free( p_sys );
+ return VLC_EGENERIC;
+ }
+
+ p_sys->fmt.i_bitrate = p_sys->fmt.audio.i_rate *
+ p_sys->fmt.audio.i_channels *
+ p_sys->fmt.audio.i_bitspersample;
+
+ msg_Dbg( p_demux,
+ "format initialized: channels=%d , samplerate=%d Hz, fourcc=%4.4s, bits per sample = %d, bitrate = %d bit/s",
+ p_sys->fmt.audio.i_channels,
+ p_sys->fmt.audio.i_rate,
+ (char*)&p_sys->fmt.i_codec,
+ p_sys->fmt.audio.i_bitspersample,
+ p_sys->fmt.i_bitrate);
+
+ /* add the es */
+ p_sys->p_es = es_out_Add( p_demux->out, &p_sys->fmt );
+ msg_Dbg( p_demux, "elementary stream added");
+
+ /* initialize timing */
+ date_Init( &p_sys->pts, p_sys->fmt.audio.i_rate, 1 );
+ date_Set( &p_sys->pts, 1 );
+
+ /* calculate 50ms frame size/time */
+ p_sys->i_frame_samples = __MAX( p_sys->fmt.audio.i_rate / 20, 1 );
+ p_sys->i_seek_step = p_sys->fmt.audio.i_channels *
+ ( (p_sys->fmt.audio.i_bitspersample + 7) / 8 );
+ p_sys->i_frame_size = p_sys->i_frame_samples * p_sys->i_seek_step;
+ msg_Dbg( p_demux, "frame size is %d bytes ", p_sys->i_frame_size);
+
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * Close: frees unused data
+ *****************************************************************************/
+static void Close( vlc_object_t *p_this )
+{
+ demux_t *p_demux = (demux_t*)p_this;
+ demux_sys_t *p_sys = p_demux->p_sys;
+
+ es_format_Clean( &p_sys->fmt );
+ free( p_sys );
+}
+
+/*****************************************************************************
+ * Demux: reads and demuxes data packets
+ *****************************************************************************
+ * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
+ *****************************************************************************/
+static int Demux( demux_t *p_demux )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+ block_t *p_block;
+
+ if( ( p_block = stream_Block( p_demux->s, p_sys->i_frame_size ) ) == NULL )
+ {
+ /* EOF */
+ return 0;
+ }
+
+ p_block->i_dts =
+ p_block->i_pts = date_Increment( &p_sys->pts, p_sys->i_frame_samples );
+
+ es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
+ es_out_Send( p_demux->out, p_sys->p_es, p_block );
+ return 1;
+}
+
+/*****************************************************************************
+ * Control:
+ *****************************************************************************/
+static int Control( demux_t *p_demux, int i_query, va_list args )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+
+ return demux_vaControlHelper( p_demux->s, 0, -1,
+ p_sys->fmt.i_bitrate, p_sys->i_seek_step, i_query, args );
+}