1 /*****************************************************************************
2 * dts.c : raw DTS stream input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2001 VideoLAN
5 * $Id: dts.c,v 1.1 2003/12/01 23:39:11 gbazin Exp $
7 * Authors: Gildas Bazin <gbazin@netcourrier.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 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 General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
28 #include <vlc/input.h>
29 #include <vlc_codec.h>
31 #define DTS_PACKET_SIZE 16384
33 /*****************************************************************************
35 *****************************************************************************/
36 static int Open ( vlc_object_t * );
37 static void Close ( vlc_object_t * );
38 static int Demux ( input_thread_t * );
46 decoder_t *p_packetizer;
49 /*****************************************************************************
51 *****************************************************************************/
53 set_description( _("Raw DTS demuxer") );
54 set_capability( "demux", 155 );
55 set_callbacks( Open, Close );
56 add_shortcut( "dts" );
59 /*****************************************************************************
60 * Open: initializes ES structures
61 *****************************************************************************/
62 static int Open( vlc_object_t * p_this )
64 input_thread_t *p_input = (input_thread_t *)p_this;
68 p_input->pf_demux = Demux;
69 p_input->pf_demux_control = demux_vaControlDefault;
70 p_input->pf_rewind = NULL;
72 /* Have a peep at the show. */
73 if( input_Peek( p_input, &p_peek, 4 ) < 4 )
75 /* Stream shorter than 4 bytes... */
76 msg_Err( p_input, "cannot peek()" );
80 if( p_peek[0] != 0x7f || p_peek[1] != 0xfe ||
81 p_peek[2] != 0x80 || p_peek[3] != 0x01 )
83 if( p_input->psz_demux && !strncmp( p_input->psz_demux, "dts", 3 ) )
86 msg_Err( p_input, "this doesn't look like a DTS audio stream, "
87 "continuing anyway" );
95 p_input->p_demux_data = p_sys = malloc( sizeof( demux_sys_t ) );
96 p_sys->b_start = VLC_TRUE;
99 * Load the DTS packetizer
101 p_sys->p_packetizer = vlc_object_create( p_input, VLC_OBJECT_DECODER );
102 p_sys->p_packetizer->pf_decode_audio = 0;
103 p_sys->p_packetizer->pf_decode_video = 0;
104 p_sys->p_packetizer->pf_decode_sub = 0;
105 p_sys->p_packetizer->pf_packetize = 0;
107 /* Initialization of decoder structure */
108 es_format_Init( &p_sys->p_packetizer->fmt_in, AUDIO_ES,
109 VLC_FOURCC( 'd', 't', 's', ' ' ) );
111 p_sys->p_packetizer->p_module =
112 module_Need( p_sys->p_packetizer, "packetizer", NULL );
113 if( !p_sys->p_packetizer->p_module )
115 msg_Err( p_input, "cannot find DTS packetizer" );
119 /* Create one program */
120 vlc_mutex_lock( &p_input->stream.stream_lock );
121 if( input_InitStream( p_input, 0 ) == -1 )
123 vlc_mutex_unlock( &p_input->stream.stream_lock );
124 msg_Err( p_input, "cannot init stream" );
127 p_input->stream.i_mux_rate = 0;
128 vlc_mutex_unlock( &p_input->stream.stream_lock );
131 es_out_Add( p_input->p_es_out, &p_sys->p_packetizer->fmt_in );
136 /*****************************************************************************
137 * Close: frees unused data
138 *****************************************************************************/
139 static void Close( vlc_object_t * p_this )
141 input_thread_t *p_input = (input_thread_t*)p_this;
142 demux_sys_t *p_sys = p_input->p_demux_data;
145 module_Unneed( p_sys->p_packetizer, p_sys->p_packetizer->p_module );
147 /* Delete the decoder */
148 vlc_object_destroy( p_sys->p_packetizer );
153 /*****************************************************************************
154 * Demux: reads and demuxes data packets
155 *****************************************************************************
156 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
157 *****************************************************************************/
158 static int Demux( input_thread_t * p_input )
160 demux_sys_t *p_sys = p_input->p_demux_data;
161 block_t *p_block_in, *p_block_out;
163 if( !( p_block_in = stream_Block( p_input->s, DTS_PACKET_SIZE ) ) )
170 p_block_in->i_pts = p_block_in->i_dts = 1;
171 p_sys->b_start = VLC_FALSE;
175 p_block_in->i_pts = p_block_in->i_dts = 0;
178 while( (p_block_out = p_sys->p_packetizer->pf_packetize(
179 p_sys->p_packetizer, &p_block_in )) )
183 block_t *p_next = p_block_out->p_next;
185 input_ClockManageRef( p_input,
186 p_input->stream.p_selected_program,
187 p_block_out->i_pts * 9 / 100 );
189 p_block_in->b_discontinuity = 0;
190 p_block_out->i_dts = p_block_out->i_pts =
191 input_ClockGetTS( p_input, p_input->stream.p_selected_program,
192 p_block_out->i_pts * 9 / 100 );
194 es_out_Send( p_input->p_es_out, p_sys->p_es, p_block_out );
196 p_block_out = p_next;