1 /*****************************************************************************
2 * rawvid.c : raw video input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2007 the VideoLAN team
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
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 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 General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, 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, NULL
, WIDTH_TEXT
, WIDTH_LONGTEXT
, 0 )
73 add_integer( "rawvid-height", 0, NULL
, 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
=0, u_fps_den
=1;
133 vlc_fourcc_t i_chroma
;
134 unsigned int i_sar_num
= 0;
135 unsigned int i_sar_den
= 0;
136 const struct preset_t
*p_preset
= NULL
;
137 const uint8_t *p_peek
;
140 if( 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
->b_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 /* Set p_input field */
173 p_demux
->pf_demux
= Demux
;
174 p_demux
->pf_control
= Control
;
175 p_demux
->p_sys
= p_sys
= malloc( sizeof( demux_sys_t
) );
179 p_sys
->b_y4m
= b_y4m
;
181 /* guess the parameters based on the preset */
184 i_width
= p_preset
->i_width
;
185 i_height
= p_preset
->i_height
;
186 u_fps_num
= p_preset
->u_fps_num
;
187 u_fps_den
= p_preset
->u_fps_den
;
188 i_sar_num
= p_preset
->u_ar_num
* p_preset
->i_height
;
189 i_sar_den
= p_preset
->u_ar_den
* p_preset
->i_width
;
190 i_chroma
= p_preset
->i_chroma
;
193 /* override presets if yuv4mpeg2 */
196 char *psz
= stream_ReadLine( p_demux
->s
);
201 /* The string will start with "YUV4MPEG2" */
202 assert( strlen(psz
) >= 9 );
204 /* NB, it is not possible to handle interlaced here, since the
205 * interlaced picture flags are in picture_t not block_t */
207 #define READ_FRAC( key, num, den ) do { \
208 psz_buf = strstr( psz+9, key );\
211 char *end = strchr( psz_buf+1, ' ' );\
213 if( end ) *end = '\0';\
214 sep = strchr( psz_buf+1, ':' );\
218 den = atoi( sep+1 );\
224 num = atoi( psz_buf+2 );\
225 if( sep ) *sep = ':';\
226 if( end ) *end = ' ';\
228 READ_FRAC( " W", i_width
, a
);
229 READ_FRAC( " H", i_height
, a
);
230 READ_FRAC( " F", u_fps_num
, u_fps_den
);
231 READ_FRAC( " A", a
, b
);
239 psz_buf
= strstr( psz
+9, " C" );
242 static const struct { const char *psz_name
; vlc_fourcc_t i_fcc
; } formats
[] =
244 { "420jpeg", VLC_CODEC_I420
},
245 { "420paldv", VLC_CODEC_I420
},
246 { "420", VLC_CODEC_I420
},
247 { "422", VLC_CODEC_I422
},
248 { "444", VLC_CODEC_I444
},
249 { "mono", VLC_CODEC_GREY
},
252 bool b_found
= false;
253 char *psz_end
= strchr( psz_buf
+1, ' ' );
258 for( int i
= 0; formats
[i
].psz_name
!= NULL
; i
++ )
260 if( !strncmp( psz_buf
, formats
[i
].psz_name
, strlen(formats
[i
].psz_name
) ) )
262 i_chroma
= formats
[i
].i_fcc
;
268 msg_Warn( p_demux
, "Unknown YUV4MPEG2 chroma type \"%s\"", psz_buf
);
276 /* allow the user to override anything guessed from the input */
278 i_tmp
= var_CreateGetInteger( p_demux
, "rawvid-width" );
279 if( i_tmp
) i_width
= i_tmp
;
281 i_tmp
= var_CreateGetInteger( p_demux
, "rawvid-height" );
282 if( i_tmp
) i_height
= i_tmp
;
285 psz_tmp
= var_CreateGetNonEmptyString( p_demux
, "rawvid-chroma" );
288 if( strlen( psz_tmp
) != 4 )
290 msg_Err( p_demux
, "Invalid fourcc format/chroma specification %s"
291 " expecting four characters eg, UYVY", psz_tmp
);
295 memcpy( &i_chroma
, psz_tmp
, 4 );
296 msg_Dbg( p_demux
, "Forcing chroma to 0x%.8x (%4.4s)", i_chroma
, (char*)&i_chroma
);
300 psz_tmp
= var_CreateGetNonEmptyString( p_demux
, "rawvid-fps" );
304 /* fps can either be n/d or q.f
305 * for accuracy, avoid representation in float */
306 u_fps_num
= strtol( psz_tmp
, &p_ptr
, 10 );
310 u_fps_den
= strtol( p_ptr
, NULL
, 10 );
312 else if( *p_ptr
== '.' )
316 int i_frac
= strtol( p_ptr
, &p_end
, 10 );
317 u_fps_den
= (p_end
- p_ptr
) * 10;
320 u_fps_num
= u_fps_num
* u_fps_den
+ i_frac
;
322 else if( *p_ptr
== '\0')
329 psz_tmp
= var_CreateGetNonEmptyString( p_demux
, "rawvid-aspect-ratio" );
332 char *psz_denominator
= strchr( psz_tmp
, ':' );
333 if( psz_denominator
)
335 *psz_denominator
++ = '\0';
336 i_sar_num
= atoi( psz_tmp
) * i_height
;
337 i_sar_den
= atoi( psz_denominator
) * i_width
;
342 /* moan about anything wrong */
343 if( i_width
<= 0 || i_height
<= 0 )
345 msg_Err( p_demux
, "width and height must be strictly positive." );
349 if( !u_fps_num
|| !u_fps_den
)
351 msg_Err( p_demux
, "invalid or no framerate specified." );
355 /* fixup anything missing with sensible assumptions */
356 if( i_sar_num
<= 0 || i_sar_den
<= 0 )
363 es_format_Init( &p_sys
->fmt_video
, VIDEO_ES
, i_chroma
);
364 video_format_Setup( &p_sys
->fmt_video
.video
,
365 i_chroma
, i_width
, i_height
,
366 i_sar_num
, i_sar_den
);
368 vlc_ureduce( &p_sys
->fmt_video
.video
.i_frame_rate
,
369 &p_sys
->fmt_video
.video
.i_frame_rate_base
,
370 u_fps_num
, u_fps_den
, 0);
371 date_Init( &p_sys
->pcr
, p_sys
->fmt_video
.video
.i_frame_rate
,
372 p_sys
->fmt_video
.video
.i_frame_rate_base
);
373 date_Set( &p_sys
->pcr
, 0 );
375 if( !p_sys
->fmt_video
.video
.i_bits_per_pixel
)
377 msg_Err( p_demux
, "Unsupported chroma 0x%.8x (%4.4s)", i_chroma
,
381 p_sys
->frame_size
= i_width
* i_height
382 * p_sys
->fmt_video
.video
.i_bits_per_pixel
/ 8;
383 p_sys
->p_es_video
= es_out_Add( p_demux
->out
, &p_sys
->fmt_video
);
388 stream_Seek( p_demux
->s
, 0 ); // Workaround, but y4m uses stream_ReadLines
393 /*****************************************************************************
394 * Close: frees unused data
395 *****************************************************************************/
396 static void Close( vlc_object_t
*p_this
)
398 demux_t
*p_demux
= (demux_t
*)p_this
;
399 demux_sys_t
*p_sys
= p_demux
->p_sys
;
403 /*****************************************************************************
404 * Demux: reads and demuxes data packets
405 *****************************************************************************
406 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
407 *****************************************************************************/
408 static int Demux( demux_t
*p_demux
)
410 demux_sys_t
*p_sys
= p_demux
->p_sys
;
412 mtime_t i_pcr
= date_Get( &p_sys
->pcr
);
414 /* Call the pace control */
415 es_out_Control( p_demux
->out
, ES_OUT_SET_PCR
, VLC_TS_0
+ i_pcr
);
419 /* Skip the frame header */
421 if( stream_Read( p_demux
->s
, NULL
, 5 ) < 5 )
427 if( stream_Read( p_demux
->s
, &b
, 1 ) < 1 )
434 if( ( p_block
= stream_Block( p_demux
->s
, p_sys
->frame_size
) ) == NULL
)
440 p_block
->i_dts
= p_block
->i_pts
= VLC_TS_0
+ i_pcr
;
441 es_out_Send( p_demux
->out
, p_sys
->p_es_video
, p_block
);
443 date_Increment( &p_sys
->pcr
, 1 );
448 /*****************************************************************************
450 *****************************************************************************/
451 static int Control( demux_t
*p_demux
, int i_query
, va_list args
)
453 demux_sys_t
*p_sys
= p_demux
->p_sys
;
455 /* (2**31)-1 is insufficient to store 1080p50 4:4:4. */
456 const int64_t i_bps
= 8LL * p_sys
->frame_size
* p_sys
->pcr
.i_divider_num
/
457 p_sys
->pcr
.i_divider_den
;
459 /* XXX: DEMUX_SET_TIME is precise here */
460 return demux_vaControlHelper( p_demux
->s
, 0, -1, i_bps
,
461 p_sys
->frame_size
, i_query
, args
);