1 /*****************************************************************************
2 * rawvid.c : raw video input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2007 VLC authors and VideoLAN
7 * Authors: Gildas Bazin <gbazin@videolan.org>
8 * Antoine Cellerier <dionoea at videolan d.t org>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU Lesser General Public License as published by
12 * the Free Software Foundation; either version 2.1 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this program; if not, write to the Free Software Foundation,
22 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
33 #include <vlc_common.h>
34 #include <vlc_plugin.h>
35 #include <vlc_demux.h>
38 /*****************************************************************************
40 *****************************************************************************/
41 static int Open ( vlc_object_t
* );
42 static void Close( vlc_object_t
* );
44 #define FPS_TEXT N_("Frames per Second")
45 #define FPS_LONGTEXT N_("This is the desired frame rate when " \
46 "playing raw video streams. In the form 30000/1001 or 29.97")
48 #define WIDTH_TEXT N_("Width")
49 #define WIDTH_LONGTEXT N_("This specifies the width in pixels of the raw " \
52 #define HEIGHT_TEXT N_("Height")
53 #define HEIGHT_LONGTEXT N_("This specifies the height in pixels of the raw " \
56 #define CHROMA_TEXT N_("Force chroma (Use carefully)")
57 #define CHROMA_LONGTEXT N_("Force chroma. This is a four character string.")
59 #define ASPECT_RATIO_TEXT N_("Aspect ratio")
60 #define ASPECT_RATIO_LONGTEXT N_( \
61 "Aspect ratio (4:3, 16:9). Default assumes square pixels." )
64 set_shortname( "Raw Video" )
65 set_description( N_("Raw video demuxer") )
66 set_capability( "demux", 10 )
67 set_category( CAT_INPUT
)
68 set_subcategory( SUBCAT_INPUT_DEMUX
)
69 set_callbacks( Open
, Close
)
70 add_shortcut( "rawvideo" )
71 add_string( "rawvid-fps", NULL
, FPS_TEXT
, FPS_LONGTEXT
, false )
72 add_integer( "rawvid-width", 0, WIDTH_TEXT
, WIDTH_LONGTEXT
, 0 )
73 add_integer( "rawvid-height", 0, HEIGHT_TEXT
, HEIGHT_LONGTEXT
, 0 )
74 add_string( "rawvid-chroma", NULL
, CHROMA_TEXT
, CHROMA_LONGTEXT
,
76 add_string( "rawvid-aspect-ratio", NULL
,
77 ASPECT_RATIO_TEXT
, ASPECT_RATIO_LONGTEXT
, true )
80 /*****************************************************************************
81 * Definitions of structures used by this plugin
82 *****************************************************************************/
87 es_out_id_t
*p_es_video
;
88 es_format_t fmt_video
;
95 /*****************************************************************************
97 *****************************************************************************/
98 static int Demux( demux_t
* );
99 static int Control( demux_t
*, int i_query
, va_list args
);
110 vlc_fourcc_t i_chroma
;
113 static const struct preset_t p_presets
[] =
115 { "sqcif", 128, 96, 30000, 1001, 4,3, VLC_CODEC_YV12
},
116 { "qcif", 176, 144, 30000, 1001, 4,3, VLC_CODEC_YV12
},
117 { "cif", 352, 288, 30000, 1001, 4,3, VLC_CODEC_YV12
},
118 { "4cif", 704, 576, 30000, 1001, 4,3, VLC_CODEC_YV12
},
119 { "16cif", 1408, 1152, 30000, 1001, 4,3, VLC_CODEC_YV12
},
120 { "yuv", 176, 144, 25, 1, 4,3, VLC_CODEC_YV12
},
121 { NULL
, 0, 0, 0, 0, 0,0, 0 }
124 /*****************************************************************************
125 * Open: initializes raw DV demux structures
126 *****************************************************************************/
127 static int Open( vlc_object_t
* p_this
)
129 demux_t
*p_demux
= (demux_t
*)p_this
;
131 int i_width
=-1, i_height
=-1;
132 unsigned u_fps_num
, u_fps_den
;
133 vlc_fourcc_t i_chroma
= 0;
134 unsigned int i_sar_num
;
135 unsigned int i_sar_den
;
136 const struct preset_t
*p_preset
= NULL
;
137 const uint8_t *p_peek
;
140 if( vlc_stream_Peek( p_demux
->s
, &p_peek
, 9 ) == 9 )
142 /* http://wiki.multimedia.cx/index.php?title=YUV4MPEG2 */
143 if( !strncmp( (char *)p_peek
, "YUV4MPEG2", 9 ) )
150 if( !p_demux
->obj
.force
)
152 /* guess preset based on file extension */
153 if( !p_demux
->psz_file
)
156 const char *psz_ext
= strrchr( p_demux
->psz_file
, '.' );
161 for( unsigned i
= 0; p_presets
[i
].psz_ext
; i
++ )
163 if( !strcasecmp( psz_ext
, p_presets
[i
].psz_ext
) )
165 p_preset
= &p_presets
[i
];
172 p_demux
->p_sys
= p_sys
= malloc( sizeof( demux_sys_t
) );
176 p_sys
->b_y4m
= b_y4m
;
178 /* guess the parameters based on the preset */
181 i_width
= p_preset
->i_width
;
182 i_height
= p_preset
->i_height
;
183 u_fps_num
= p_preset
->u_fps_num
;
184 u_fps_den
= p_preset
->u_fps_den
;
185 i_sar_num
= p_preset
->u_ar_num
* p_preset
->i_height
;
186 i_sar_den
= p_preset
->u_ar_den
* p_preset
->i_width
;
187 i_chroma
= p_preset
->i_chroma
;
190 /* override presets if yuv4mpeg2 */
193 /* The string should start with "YUV4MPEG2" */
194 char *psz
= vlc_stream_ReadLine( p_demux
->s
);
199 if( unlikely(psz
== NULL
) )
202 /* NB, it is not possible to handle interlaced here, since the
203 * interlaced picture flags are in picture_t not block_t */
205 #define READ_FRAC( key, num, den ) do { \
206 psz_buf = strstr( psz+9, key );\
209 char *end = strchr( psz_buf+1, ' ' );\
211 if( end ) *end = '\0';\
212 sep = strchr( psz_buf+1, ':' );\
216 den = atoi( sep+1 );\
222 num = atoi( psz_buf+2 );\
223 if( sep ) *sep = ':';\
224 if( end ) *end = ' ';\
226 READ_FRAC( " W", i_width
, a
);
227 READ_FRAC( " H", i_height
, a
);
228 READ_FRAC( " F", u_fps_num
, u_fps_den
);
229 READ_FRAC( " A", a
, b
);
237 psz_buf
= strstr( psz
+9, " C" );
240 static const struct { const char *psz_name
; vlc_fourcc_t i_fcc
; } formats
[] =
242 { "420jpeg", VLC_CODEC_I420
},
243 { "420paldv", VLC_CODEC_I420
},
244 { "420", VLC_CODEC_I420
},
245 { "422", VLC_CODEC_I422
},
246 { "444", VLC_CODEC_I444
},
247 { "mono", VLC_CODEC_GREY
},
250 bool b_found
= false;
251 char *psz_end
= strchr( psz_buf
+1, ' ' );
256 for( int i
= 0; formats
[i
].psz_name
!= NULL
; i
++ )
258 if( !strncmp( psz_buf
, formats
[i
].psz_name
, strlen(formats
[i
].psz_name
) ) )
260 i_chroma
= formats
[i
].i_fcc
;
266 msg_Warn( p_demux
, "Unknown YUV4MPEG2 chroma type \"%s\"", psz_buf
);
274 /* allow the user to override anything guessed from the input */
276 i_tmp
= var_CreateGetInteger( p_demux
, "rawvid-width" );
277 if( i_tmp
) i_width
= i_tmp
;
279 i_tmp
= var_CreateGetInteger( p_demux
, "rawvid-height" );
280 if( i_tmp
) i_height
= i_tmp
;
283 psz_tmp
= var_CreateGetNonEmptyString( p_demux
, "rawvid-chroma" );
286 if( strlen( psz_tmp
) != 4 )
288 msg_Err( p_demux
, "Invalid fourcc format/chroma specification %s"
289 " expecting four characters eg, UYVY", psz_tmp
);
293 memcpy( &i_chroma
, psz_tmp
, 4 );
294 msg_Dbg( p_demux
, "Forcing chroma to 0x%.8x (%4.4s)", i_chroma
, (char*)&i_chroma
);
298 if( var_InheritURational( p_demux
, &u_fps_num
, &u_fps_den
, "rawvid-fps" ) )
304 if( var_InheritURational( p_demux
, &i_sar_num
, &i_sar_den
,
305 "rawvid-aspect-ratio" ) )
306 i_sar_num
= i_sar_den
= 1;
308 /* moan about anything wrong */
309 if( i_width
<= 0 || i_height
<= 0 )
311 msg_Err( p_demux
, "width and height must be strictly positive." );
315 if( !u_fps_num
|| !u_fps_den
)
317 msg_Err( p_demux
, "invalid or no framerate specified." );
323 msg_Err( p_demux
, "invalid or no chroma specified." );
327 /* fixup anything missing with sensible assumptions */
328 if( i_sar_num
<= 0 || i_sar_den
<= 0 )
335 es_format_Init( &p_sys
->fmt_video
, VIDEO_ES
, i_chroma
);
336 video_format_Setup( &p_sys
->fmt_video
.video
, i_chroma
,
337 i_width
, i_height
, i_width
, i_height
,
338 i_sar_num
, i_sar_den
);
340 vlc_ureduce( &p_sys
->fmt_video
.video
.i_frame_rate
,
341 &p_sys
->fmt_video
.video
.i_frame_rate_base
,
342 u_fps_num
, u_fps_den
, 0);
343 date_Init( &p_sys
->pcr
, p_sys
->fmt_video
.video
.i_frame_rate
,
344 p_sys
->fmt_video
.video
.i_frame_rate_base
);
345 date_Set( &p_sys
->pcr
, 0 );
347 if( !p_sys
->fmt_video
.video
.i_bits_per_pixel
)
349 msg_Err( p_demux
, "Unsupported chroma 0x%.8x (%4.4s)", i_chroma
,
353 p_sys
->frame_size
= i_width
* i_height
354 * p_sys
->fmt_video
.video
.i_bits_per_pixel
/ 8;
355 p_sys
->p_es_video
= es_out_Add( p_demux
->out
, &p_sys
->fmt_video
);
357 p_demux
->pf_demux
= Demux
;
358 p_demux
->pf_control
= Control
;
362 /* workaround, but y4m uses vlc_stream_ReadLine */
363 vlc_stream_Seek( p_demux
->s
, 0 );
368 /*****************************************************************************
369 * Close: frees unused data
370 *****************************************************************************/
371 static void Close( vlc_object_t
*p_this
)
373 demux_t
*p_demux
= (demux_t
*)p_this
;
374 demux_sys_t
*p_sys
= p_demux
->p_sys
;
378 /*****************************************************************************
379 * Demux: reads and demuxes data packets
380 *****************************************************************************
381 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
382 *****************************************************************************/
383 static int Demux( demux_t
*p_demux
)
385 demux_sys_t
*p_sys
= p_demux
->p_sys
;
387 mtime_t i_pcr
= date_Get( &p_sys
->pcr
);
389 /* Call the pace control */
390 es_out_Control( p_demux
->out
, ES_OUT_SET_PCR
, VLC_TS_0
+ i_pcr
);
394 /* Skip the frame header */
396 if( vlc_stream_Read( p_demux
->s
, NULL
, 5 ) < 5 )
402 if( vlc_stream_Read( p_demux
->s
, &b
, 1 ) < 1 )
409 p_block
= vlc_stream_Block( p_demux
->s
, p_sys
->frame_size
);
410 if( p_block
== NULL
)
416 p_block
->i_dts
= p_block
->i_pts
= VLC_TS_0
+ i_pcr
;
417 es_out_Send( p_demux
->out
, p_sys
->p_es_video
, p_block
);
419 date_Increment( &p_sys
->pcr
, 1 );
424 /*****************************************************************************
426 *****************************************************************************/
427 static int Control( demux_t
*p_demux
, int i_query
, va_list args
)
429 demux_sys_t
*p_sys
= p_demux
->p_sys
;
431 /* (2**31)-1 is insufficient to store 1080p50 4:4:4. */
432 const int64_t i_bps
= 8LL * p_sys
->frame_size
* p_sys
->pcr
.i_divider_num
/
433 p_sys
->pcr
.i_divider_den
;
435 /* XXX: DEMUX_SET_TIME is precise here */
436 return demux_vaControlHelper( p_demux
->s
, 0, -1, i_bps
,
437 p_sys
->frame_size
, i_query
, args
);