modules/misc/stats.c

   1 /*****************************************************************************
   2  * stats.c : stats plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000-2008 the VideoLAN team
   5  *
   6  * Authors: Samuel Hocevar <sam@zoy.org>
   7  *          Pierre d'Herbemont <pdherbemont@videolan.org>
   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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 /* Example usage:
  29  *  $ vlc movie.avi --sout="#transcode{aenc=dummy,venc=stats}:\
  30  *                          std{access=http,mux=dummy,dst=0.0.0.0:8081}"
  31  *  $ vlc -vv http://127.0.0.1:8081 --demux=stats --vout=stats --codec=stats
  32  */
  33
  34 #define kBufferSize 0x500
  35
  36 #define VLC_MODULE_LICENSE VLC_LICENSE_GPL_2_PLUS
  37 #include <vlc_common.h>
  38 #include <vlc_plugin.h>
  39 #include <vlc_codec.h>
  40 #include <vlc_demux.h>
  41
  42 /*** Decoder ***/
  43 static int DecodeBlock( decoder_t *p_dec, block_t *p_block )
  44 {
  45     picture_t * p_pic = NULL;
  46
  47     if( p_block == NULL ) /* No Drain */
  48         return VLCDEC_SUCCESS;
  49
  50     if( !decoder_UpdateVideoFormat( p_dec ) )
  51         p_pic = decoder_NewPicture( p_dec );
  52     if( !p_pic )
  53         goto error;
  54
  55     if( p_block->i_buffer == kBufferSize )
  56     {
  57         msg_Dbg( p_dec, "got %"PRIu64" ms",
  58                  *(mtime_t *)p_block->p_buffer  / 1000 );
  59         msg_Dbg( p_dec, "got %"PRIu64" ms offset",
  60                  (mdate() - *(mtime_t *)p_block->p_buffer) / 1000 );
  61         *(mtime_t *)(p_pic->p->p_pixels) = *(mtime_t *)p_block->p_buffer;
  62     }
  63     else
  64     {
  65         msg_Dbg( p_dec, "got a packet not from stats demuxer" );
  66         *(mtime_t *)(p_pic->p->p_pixels) = mdate();
  67     }
  68
  69     p_pic->date = p_block->i_pts > VLC_TS_INVALID ?
  70             p_block->i_pts : p_block->i_dts;
  71     p_pic->b_force = true;
  72
  73 error:
  74     block_Release( p_block );
  75     decoder_QueueVideo( p_dec, p_pic );
  76     return VLCDEC_SUCCESS;
  77 }
  78
  79 static int OpenDecoder ( vlc_object_t *p_this )
  80 {
  81     decoder_t *p_dec = (decoder_t*)p_this;
  82
  83     msg_Dbg( p_this, "opening stats decoder" );
  84
  85     /* Set callbacks */
  86     p_dec->pf_decode = DecodeBlock;
  87
  88     /* */
  89     p_dec->fmt_out.i_codec = VLC_CODEC_I420;
  90     p_dec->fmt_out.video.i_width = 100;
  91     p_dec->fmt_out.video.i_height = 100;
  92     p_dec->fmt_out.video.i_sar_num = 1;
  93     p_dec->fmt_out.video.i_sar_den = 1;
  94
  95     return VLC_SUCCESS;
  96 }
  97
  98 /*** Encoder ***/
  99 #ifdef ENABLE_SOUT
 100 static block_t *EncodeVideo( encoder_t *p_enc, picture_t *p_pict )
 101 {
 102     (void)p_pict;
 103     block_t * p_block = block_Alloc( kBufferSize );
 104
 105     *(mtime_t*)p_block->p_buffer = mdate();
 106     p_block->i_buffer = kBufferSize;
 107     p_block->i_length = kBufferSize;
 108     p_block->i_dts = p_pict->date;
 109
 110     msg_Dbg( p_enc, "putting %"PRIu64"ms",
 111              *(mtime_t*)p_block->p_buffer / 1000 );
 112     return p_block;
 113 }
 114
 115 static block_t *EncodeAudio( encoder_t *p_enc, block_t *p_abuff )
 116 {
 117     (void)p_abuff;
 118     (void)p_enc;
 119     return NULL;
 120 }
 121
 122 static int OpenEncoder ( vlc_object_t *p_this )
 123 {
 124     encoder_t *p_enc = (encoder_t *)p_this;
 125
 126     msg_Dbg( p_this, "opening stats encoder" );
 127
 128     p_enc->pf_encode_video = EncodeVideo;
 129     p_enc->pf_encode_audio = EncodeAudio;
 130
 131     return VLC_SUCCESS;
 132 }
 133 #endif
 134
 135 /*** Demuxer ***/
 136 struct demux_sys_t
 137 {
 138     es_format_t     fmt;
 139     es_out_id_t     *p_es;
 140
 141     date_t          pts;
 142 };
 143
 144 static int Demux( demux_t *p_demux )
 145 {
 146     demux_sys_t *p_sys = p_demux->p_sys;
 147
 148     block_t * p_block = vlc_stream_Block( p_demux->s, kBufferSize );
 149
 150     if( !p_block ) return 1;
 151
 152     p_block->i_dts = p_block->i_pts =
 153         date_Increment( &p_sys->pts, kBufferSize );
 154
 155     msg_Dbg( p_demux, "demux got %"PRId64" ms offset",
 156              (mdate() - *(mtime_t *)p_block->p_buffer) / 1000 );
 157
 158     //es_out_SetPCR( p_demux->out, p_block->i_pts );
 159
 160     es_out_Send( p_demux->out, p_sys->p_es, p_block );
 161
 162     return 1;
 163 }
 164
 165 static int DemuxControl( demux_t *p_demux, int i_query, va_list args )
 166 {
 167     return demux_vaControlHelper( p_demux->s,
 168                                    0, 0, 0, 1,
 169                                    i_query, args );
 170 }
 171
 172 static int OpenDemux ( vlc_object_t *p_this )
 173 {
 174     demux_t *p_demux = (demux_t*)p_this;
 175     demux_sys_t *p_sys;
 176
 177     p_demux->p_sys = NULL;
 178
 179     /* Only when selected */
 180     if( *p_demux->psz_name == '\0' )
 181         return VLC_EGENERIC;
 182
 183     msg_Dbg( p_demux, "Init Stat demux" );
 184
 185     p_demux->pf_demux   = Demux;
 186     p_demux->pf_control = DemuxControl;
 187
 188     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 189     if( !p_demux->p_sys )
 190         return VLC_ENOMEM;
 191
 192     date_Init( &p_sys->pts, 1, 1 );
 193     date_Set( &p_sys->pts, 1 );
 194
 195     es_format_Init( &p_sys->fmt, VIDEO_ES, VLC_FOURCC('s','t','a','t') );
 196     p_sys->fmt.video.i_width = 720;
 197     p_sys->fmt.video.i_height= 480;
 198
 199     p_sys->p_es = es_out_Add( p_demux->out, &p_sys->fmt );
 200
 201     return VLC_SUCCESS;
 202 }
 203
 204 static void CloseDemux ( vlc_object_t *p_this )
 205 {
 206     demux_t *p_demux = (demux_t*)p_this;
 207
 208     msg_Dbg( p_demux, "Closing Stat demux" );
 209
 210     free( p_demux->p_sys );
 211 }
 212
 213 vlc_module_begin ()
 214     set_shortname( N_("Stats"))
 215 #ifdef ENABLE_SOUT
 216     set_description( N_("Stats encoder function") )
 217     set_capability( "encoder", 0 )
 218     add_shortcut( "stats" )
 219     set_callbacks( OpenEncoder, NULL )
 220     add_submodule ()
 221 #endif
 222         set_section( N_( "Stats decoder" ), NULL )
 223         set_description( N_("Stats decoder function") )
 224         set_capability( "video decoder", 0 )
 225         add_shortcut( "stats" )
 226         set_callbacks( OpenDecoder, NULL )
 227     add_submodule()
 228         set_section( N_( "Stats decoder" ), NULL )
 229         set_description( N_("Stats decoder function") )
 230         set_capability( "audio decoder", 0 )
 231         add_shortcut( "stats" )
 232         set_callbacks( OpenDecoder, NULL )
 233     add_submodule()
 234         set_section( N_( "Stats decoder" ), NULL )
 235         set_description( N_("Stats decoder function") )
 236         set_capability( "spu decoder", 0 )
 237         add_shortcut( "stats" )
 238         set_callbacks( OpenDecoder, NULL )
 239     add_submodule ()
 240         set_section( N_( "Stats demux" ), NULL )
 241         set_description( N_("Stats demux function") )
 242         set_capability( "demux", 0 )
 243         add_shortcut( "stats" )
 244         set_callbacks( OpenDemux, CloseDemux )
 245 vlc_module_end ()