1 /*****************************************************************************
2 * rawaud.c : raw audio input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2009 VLC authors and VideoLAN
7 * Authors: Jarmo Torvinen <jarmo.torvinen@jutel.fi>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU Lesser General Public License as published by
11 * the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_demux.h>
36 /*****************************************************************************
38 *****************************************************************************/
39 static int Open ( vlc_object_t
* );
40 static void Close( vlc_object_t
* );
43 #define SAMPLERATE_TEXT N_("Audio samplerate (Hz)")
44 #define SAMPLERATE_LONGTEXT N_("Audio sample rate in Hertz. Default is 48000 Hz.")
46 #define CHANNELS_TEXT N_("Audio channels")
47 #define CHANNELS_LONGTEXT N_("Audio channels in input stream. Numeric value >0. Default is 2.")
49 #define FOURCC_TEXT N_("FOURCC code of raw input format")
50 #define FOURCC_LONGTEXT N_( \
51 "FOURCC code of the raw input format. This is a four character string." )
53 #define LANG_TEXT N_("Forces the audio language")
54 #define LANG_LONGTEXT N_("Forces the audio language for the output mux. Three letter ISO639 code. Default is 'eng'.")
56 #ifdef WORDS_BIGENDIAN
57 # define FOURCC_DEFAULT "s16b"
59 # define FOURCC_DEFAULT "s16l"
63 set_shortname( "Raw Audio" );
64 set_description( N_("Raw audio demuxer") );
65 set_capability( "demux", 0 );
66 set_category( CAT_INPUT
);
67 set_subcategory( SUBCAT_INPUT_DEMUX
);
68 set_callbacks( Open
, Close
);
69 add_shortcut( "rawaud" );
70 add_integer( "rawaud-channels", 2, CHANNELS_TEXT
, CHANNELS_LONGTEXT
, false );
72 add_integer( "rawaud-samplerate", 48000, SAMPLERATE_TEXT
, SAMPLERATE_LONGTEXT
, false );
74 add_string( "rawaud-fourcc", FOURCC_DEFAULT
,
75 FOURCC_TEXT
, FOURCC_LONGTEXT
, false );
77 add_string( "rawaud-lang", "eng", LANG_TEXT
, LANG_LONGTEXT
, false);
80 /*****************************************************************************
81 * Definitions of structures used by this plugin
82 *****************************************************************************/
87 unsigned int i_frame_size
;
88 unsigned int i_frame_samples
;
89 unsigned int i_seek_step
;
94 /*****************************************************************************
96 *****************************************************************************/
97 static int Demux( demux_t
* );
98 static int Control( demux_t
*, int i_query
, va_list args
);
101 /*****************************************************************************
102 * Open: initializes raw audio demuxer
103 *****************************************************************************/
104 static int Open( vlc_object_t
* p_this
)
106 demux_t
*p_demux
= (demux_t
*)p_this
;
109 p_demux
->p_sys
= p_sys
= malloc( sizeof( demux_sys_t
) );
113 char *psz_fourcc
= var_CreateGetString( p_demux
, "rawaud-fourcc" );
114 es_format_Init( &p_sys
->fmt
, AUDIO_ES
,
115 vlc_fourcc_GetCodecFromString( AUDIO_ES
, psz_fourcc
) );
118 if( !p_sys
->fmt
.i_codec
)
120 msg_Err( p_demux
, "rawaud-fourcc must be a 4 character string");
121 es_format_Clean( &p_sys
->fmt
);
126 // get the bits per sample ratio based on codec
127 switch( p_sys
->fmt
.i_codec
)
131 p_sys
->fmt
.audio
.i_bitspersample
= 64;
137 p_sys
->fmt
.audio
.i_bitspersample
= 32;
142 p_sys
->fmt
.audio
.i_bitspersample
= 24;
147 p_sys
->fmt
.audio
.i_bitspersample
= 16;
152 p_sys
->fmt
.audio
.i_bitspersample
= 8;
156 msg_Err( p_demux
, "unknown fourcc format %4.4s",
157 (char *)&p_sys
->fmt
.i_codec
);
158 es_format_Clean( &p_sys
->fmt
);
165 p_sys
->fmt
.psz_language
= var_CreateGetString( p_demux
, "rawaud-lang" );
166 p_sys
->fmt
.audio
.i_channels
= var_CreateGetInteger( p_demux
, "rawaud-channels" );
167 p_sys
->fmt
.audio
.i_rate
= var_CreateGetInteger( p_demux
, "rawaud-samplerate" );
169 if( p_sys
->fmt
.audio
.i_rate
== 0 || p_sys
->fmt
.audio
.i_rate
> 384000 )
171 msg_Err( p_demux
, "invalid sample rate");
172 es_format_Clean( &p_sys
->fmt
);
177 if( p_sys
->fmt
.audio
.i_channels
== 0 || p_sys
->fmt
.audio
.i_channels
> 32 )
179 msg_Err( p_demux
, "invalid number of channels");
180 es_format_Clean( &p_sys
->fmt
);
185 p_sys
->fmt
.i_bitrate
= p_sys
->fmt
.audio
.i_rate
*
186 p_sys
->fmt
.audio
.i_channels
*
187 p_sys
->fmt
.audio
.i_bitspersample
;
189 if( p_sys
->fmt
.i_bitrate
> 50000000)
191 msg_Err( p_demux
, "invalid bitrate");
192 es_format_Clean( &p_sys
->fmt
);
198 "format initialized: channels=%d , samplerate=%d Hz, fourcc=%4.4s, bits per sample = %d, bitrate = %d bit/s",
199 p_sys
->fmt
.audio
.i_channels
,
200 p_sys
->fmt
.audio
.i_rate
,
201 (char*)&p_sys
->fmt
.i_codec
,
202 p_sys
->fmt
.audio
.i_bitspersample
,
203 p_sys
->fmt
.i_bitrate
);
206 p_sys
->p_es
= es_out_Add( p_demux
->out
, &p_sys
->fmt
);
207 msg_Dbg( p_demux
, "elementary stream added");
209 /* initialize timing */
210 date_Init( &p_sys
->pts
, p_sys
->fmt
.audio
.i_rate
, 1 );
211 date_Set( &p_sys
->pts
, 0 );
213 /* calculate 50ms frame size/time */
214 p_sys
->i_frame_samples
= __MAX( p_sys
->fmt
.audio
.i_rate
/ 20, 1 );
215 p_sys
->i_seek_step
= p_sys
->fmt
.audio
.i_channels
*
216 ( (p_sys
->fmt
.audio
.i_bitspersample
+ 7) / 8 );
217 p_sys
->i_frame_size
= p_sys
->i_frame_samples
* p_sys
->i_seek_step
;
218 msg_Dbg( p_demux
, "frame size is %d bytes ", p_sys
->i_frame_size
);
220 p_demux
->pf_demux
= Demux
;
221 p_demux
->pf_control
= Control
;
225 /*****************************************************************************
226 * Close: frees unused data
227 *****************************************************************************/
228 static void Close( vlc_object_t
*p_this
)
230 demux_t
*p_demux
= (demux_t
*)p_this
;
231 demux_sys_t
*p_sys
= p_demux
->p_sys
;
233 es_format_Clean( &p_sys
->fmt
);
237 /*****************************************************************************
238 * Demux: reads and demuxes data packets
239 *****************************************************************************
240 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
241 *****************************************************************************/
242 static int Demux( demux_t
*p_demux
)
244 demux_sys_t
*p_sys
= p_demux
->p_sys
;
247 p_block
= vlc_stream_Block( p_demux
->s
, p_sys
->i_frame_size
);
248 if( p_block
== NULL
)
254 p_block
->i_dts
= p_block
->i_pts
= VLC_TS_0
+ date_Get( &p_sys
->pts
);
256 es_out_SetPCR( p_demux
->out
, p_block
->i_pts
);
257 es_out_Send( p_demux
->out
, p_sys
->p_es
, p_block
);
259 date_Increment( &p_sys
->pts
, p_sys
->i_frame_samples
);
264 /*****************************************************************************
266 *****************************************************************************/
267 static int Control( demux_t
*p_demux
, int i_query
, va_list args
)
269 demux_sys_t
*p_sys
= p_demux
->p_sys
;
271 return demux_vaControlHelper( p_demux
->s
, 0, -1,
272 p_sys
->fmt
.i_bitrate
, p_sys
->i_seek_step
, i_query
, args
);