git.sesse.net Git - vlc/blob - modules/stream_out/display.c

   1 /*****************************************************************************
   2  * display.c
   3  *****************************************************************************
   4  * Copyright (C) 2001, 2002 VideoLAN
   5  * $Id: display.c,v 1.6 2003/11/18 16:46:31 fenrir Exp $
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *
   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.
  13  *
  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.
  18  *
  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  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include <vlc/vlc.h>
  31 #include <vlc/input.h>
  32 #include <vlc/sout.h>
  33
  34 #include "codecs.h"
  35
  36 /*****************************************************************************
  37  * Exported prototypes
  38  *****************************************************************************/
  39 static int      Open    ( vlc_object_t * );
  40 static void     Close   ( vlc_object_t * );
  41
  42 static sout_stream_id_t *Add ( sout_stream_t *, sout_format_t * );
  43 static int               Del ( sout_stream_t *, sout_stream_id_t * );
  44 static int               Send( sout_stream_t *, sout_stream_id_t *, sout_buffer_t* );
  45
  46 /*****************************************************************************
  47  * Module descriptor
  48  *****************************************************************************/
  49 vlc_module_begin();
  50     set_description( _("Display stream") );
  51     set_capability( "sout stream", 50 );
  52     add_shortcut( "display" );
  53     set_callbacks( Open, Close );
  54 vlc_module_end();
  55
  56 struct sout_stream_sys_t
  57 {
  58     input_thread_t *p_input;
  59
  60     vlc_bool_t     b_audio;
  61     vlc_bool_t     b_video;
  62
  63     mtime_t        i_delay;
  64 };
  65
  66 /*****************************************************************************
  67  * Open:
  68  *****************************************************************************/
  69 static int Open( vlc_object_t *p_this )
  70 {
  71     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
  72     sout_stream_sys_t *p_sys;
  73     char              *val;
  74     p_sys           = malloc( sizeof( sout_stream_sys_t ) );
  75     p_sys->p_input  = vlc_object_find( p_stream, VLC_OBJECT_INPUT, FIND_ANYWHERE );
  76     if( !p_sys->p_input )
  77     {
  78         msg_Err( p_stream, "cannot find p_input" );
  79         free( p_sys );
  80         return VLC_EGENERIC;
  81     }
  82
  83     p_sys->b_audio = VLC_TRUE;
  84     p_sys->b_video = VLC_TRUE;
  85     p_sys->i_delay = 100*1000;
  86     if( sout_cfg_find( p_stream->p_cfg, "noaudio" ) )
  87     {
  88         p_sys->b_audio = VLC_FALSE;
  89     }
  90     if( sout_cfg_find( p_stream->p_cfg, "novideo" ) )
  91     {
  92         p_sys->b_video = VLC_FALSE;
  93     }
  94     if( ( val = sout_cfg_find_value( p_stream->p_cfg, "delay" ) ) )
  95     {
  96         p_sys->i_delay = (mtime_t)atoi( val ) * (mtime_t)1000;
  97     }
  98
  99     p_stream->pf_add    = Add;
 100     p_stream->pf_del    = Del;
 101     p_stream->pf_send   = Send;
 102
 103     p_stream->p_sys     = p_sys;
 104
 105     return VLC_SUCCESS;
 106 }
 107
 108 /*****************************************************************************
 109  * Close:
 110  *****************************************************************************/
 111
 112 static void Close( vlc_object_t * p_this )
 113 {
 114     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 115     sout_stream_sys_t *p_sys = p_stream->p_sys;
 116
 117     vlc_object_release( p_sys->p_input );
 118
 119     free( p_sys );
 120 }
 121
 122 struct sout_stream_id_t
 123 {
 124     es_descriptor_t *p_es;
 125 };
 126
 127
 128 static sout_stream_id_t * Add      ( sout_stream_t *p_stream, sout_format_t *p_fmt )
 129 {
 130     sout_stream_sys_t *p_sys = p_stream->p_sys;
 131     sout_stream_id_t *id;
 132
 133     if( ( p_fmt->i_cat == AUDIO_ES && !p_sys->b_audio )||
 134         ( p_fmt->i_cat == VIDEO_ES && !p_sys->b_video ) )
 135     {
 136         return NULL;
 137     }
 138
 139     id = malloc( sizeof( sout_stream_id_t ) );
 140
 141     vlc_mutex_lock( &p_sys->p_input->stream.stream_lock );
 142     id->p_es = input_AddES( p_sys->p_input,
 143                             NULL,           /* no program */
 144                             12,             /* es_id */
 145                             p_fmt->i_cat, /* UNKNOWN_ES,*/    /* es category */
 146                             NULL,           /* description */
 147                             0 );            /* no extra data */
 148
 149     if( !id->p_es )
 150     {
 151         vlc_mutex_unlock( &p_sys->p_input->stream.stream_lock );
 152
 153         msg_Err( p_stream, "cannot create es" );
 154         free( id );
 155         return NULL;
 156     }
 157     id->p_es->i_stream_id   = 1;
 158     id->p_es->i_fourcc      = p_fmt->i_fourcc;
 159     id->p_es->b_force_decoder = VLC_TRUE;
 160     switch( p_fmt->i_cat )
 161     {
 162         case AUDIO_ES:
 163             id->p_es->p_bitmapinfoheader = NULL;
 164             id->p_es->p_waveformatex =
 165                 malloc( sizeof( WAVEFORMATEX ) + p_fmt->i_extra_data );
 166 #define p_wf    ((WAVEFORMATEX*)id->p_es->p_waveformatex)
 167             p_wf->wFormatTag     = WAVE_FORMAT_UNKNOWN;
 168             p_wf->nChannels      = p_fmt->i_channels;
 169             p_wf->nSamplesPerSec = p_fmt->i_sample_rate;
 170             p_wf->nAvgBytesPerSec= p_fmt->i_bitrate / 8;
 171             p_wf->nBlockAlign    = p_fmt->i_block_align;
 172             p_wf->wBitsPerSample = 0;
 173             p_wf->cbSize         = p_fmt->i_extra_data;
 174             if( p_fmt->i_extra_data > 0 )
 175             {
 176                 memcpy( &p_wf[1],
 177                         p_fmt->p_extra_data,
 178                         p_fmt->i_extra_data );
 179             }
 180 #undef p_wf
 181             break;
 182         case VIDEO_ES:
 183             id->p_es->p_waveformatex = NULL;
 184             id->p_es->p_bitmapinfoheader = malloc( sizeof( BITMAPINFOHEADER ) + p_fmt->i_extra_data );
 185 #define p_bih ((BITMAPINFOHEADER*)id->p_es->p_bitmapinfoheader)
 186             p_bih->biSize   = sizeof( BITMAPINFOHEADER ) + p_fmt->i_extra_data;
 187             p_bih->biWidth  = p_fmt->i_width;
 188             p_bih->biHeight = p_fmt->i_height;
 189             p_bih->biPlanes   = 0;
 190             p_bih->biBitCount = 0;
 191             p_bih->biCompression = 0;
 192             p_bih->biSizeImage   = 0;
 193             p_bih->biXPelsPerMeter = 0;
 194             p_bih->biYPelsPerMeter = 0;
 195             p_bih->biClrUsed       = 0;
 196             p_bih->biClrImportant  = 0;
 197             if( p_fmt->i_extra_data > 0 )
 198             {
 199                 memcpy( &p_bih[1],
 200                         p_fmt->p_extra_data,
 201                         p_fmt->i_extra_data );
 202             }
 203 #undef p_bih
 204             break;
 205         default:
 206             msg_Err( p_stream, "unknown es type" );
 207             free( id );
 208             return NULL;
 209     }
 210
 211     if( input_SelectES( p_sys->p_input, id->p_es ) )
 212     {
 213         input_DelES( p_sys->p_input, id->p_es );
 214         vlc_mutex_unlock( &p_sys->p_input->stream.stream_lock );
 215
 216         msg_Err( p_stream, "cannot select es" );
 217         free( id );
 218         return NULL;
 219     }
 220     vlc_mutex_unlock( &p_sys->p_input->stream.stream_lock );
 221
 222     return id;
 223 }
 224
 225 static int     Del      ( sout_stream_t *p_stream, sout_stream_id_t *id )
 226 {
 227     sout_stream_sys_t *p_sys = p_stream->p_sys;
 228
 229     input_DelES( p_sys->p_input, id->p_es );
 230
 231     free( id );
 232
 233     return VLC_SUCCESS;
 234 }
 235
 236 static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
 237                  sout_buffer_t *p_buffer )
 238 {
 239     sout_stream_sys_t *p_sys = p_stream->p_sys;
 240
 241     while( p_buffer )
 242     {
 243         sout_buffer_t *p_next;
 244         pes_packet_t *p_pes;
 245         data_packet_t   *p_data;
 246
 247         if( p_buffer->i_size > 0 )
 248         {
 249             if( !( p_pes = input_NewPES( p_sys->p_input->p_method_data ) ) )
 250             {
 251                 msg_Err( p_stream, "cannot allocate new PES" );
 252                 return VLC_EGENERIC;
 253             }
 254             if( !( p_data = input_NewPacket( p_sys->p_input->p_method_data,
 255                                              p_buffer->i_size ) ) )
 256             {
 257                 msg_Err( p_stream, "cannot allocate new data_packet" );
 258                 return VLC_EGENERIC;
 259             }
 260             p_data->p_payload_end = p_data->p_payload_start + p_buffer->i_size;
 261
 262             p_pes->i_dts = p_buffer->i_dts < 0 ? 0 :
 263                            p_buffer->i_dts + p_sys->i_delay;
 264             p_pes->i_pts = p_buffer->i_pts < 0 ? 0 :
 265                            p_buffer->i_pts + p_sys->i_delay;
 266             p_pes->p_first = p_pes->p_last = p_data;
 267             p_pes->i_nb_data = 1;
 268             p_pes->i_pes_size = p_buffer->i_size;
 269
 270             p_stream->p_vlc->pf_memcpy( p_data->p_payload_start,
 271                                         p_buffer->p_buffer,
 272                                         p_buffer->i_size );
 273
 274             if( id->p_es->p_decoder_fifo )
 275             {
 276                 input_DecodePES( id->p_es->p_decoder_fifo, p_pes );
 277             }
 278             else
 279             {
 280                 input_DeletePES( p_sys->p_input->p_method_data, p_pes );
 281             }
 282         }
 283
 284         /* *** go to next buffer *** */
 285         p_next = p_buffer->p_next;
 286         sout_BufferDelete( p_stream->p_sout, p_buffer );
 287         p_buffer = p_next;
 288     }
 289
 290     return VLC_SUCCESS;
 291 }
 292