/*****************************************************************************
* rawvid.c : raw video input module for vlc
*****************************************************************************
* Copyright (C) 2007 VLC authors and VideoLAN
*
* Authors: Gildas Bazin <gbazin@videolan.org>
* Antoine Cellerier <dionoea at videolan d.t org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include
"config.h"
#endif
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_demux.h>
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close( vlc_object_t * );
#define FPS_TEXT N_(
"Frames per Second")
#define FPS_LONGTEXT N_(
"This is the desired frame rate when " \
"playing raw video streams. In the form 30000/1001 or 29.97")
#define WIDTH_TEXT N_(
"Width")
#define WIDTH_LONGTEXT N_(
"This specifies the width in pixels of the raw " \
"video stream.")
#define HEIGHT_TEXT N_(
"Height")
#define HEIGHT_LONGTEXT N_(
"This specifies the height in pixels of the raw " \
"video stream.")
#define CHROMA_TEXT N_(
"Force chroma (Use carefully)")
#define CHROMA_LONGTEXT N_(
"Force chroma. This is a four character string.")
#define ASPECT_RATIO_TEXT N_(
"Aspect ratio")
#define ASPECT_RATIO_LONGTEXT N_( \
"Aspect ratio (4:3, 16:9). Default assumes square pixels." )
vlc_module_begin ()
set_shortname(
"Raw Video" )
set_description( N_(
"Raw video demuxer") )
set_capability(
"demux",
10 )
set_subcategory( SUBCAT_INPUT_DEMUX )
set_callbacks( Open, Close )
add_shortcut(
"rawvideo" )
add_string(
"rawvid-fps", NULL, FPS_TEXT, FPS_LONGTEXT )
add_integer(
"rawvid-width",
0, WIDTH_TEXT, WIDTH_LONGTEXT )
add_integer(
"rawvid-height",
0, HEIGHT_TEXT, HEIGHT_LONGTEXT )
add_string(
"rawvid-chroma", NULL, CHROMA_TEXT, CHROMA_LONGTEXT )
add_string(
"rawvid-aspect-ratio", NULL,
ASPECT_RATIO_TEXT, ASPECT_RATIO_LONGTEXT )
vlc_module_end ()
/*****************************************************************************
* Definitions of structures used by this plugin
*****************************************************************************/
typedef struct
{
int frame_size;
es_out_id_t *p_es_video;
es_format_t fmt_video;
date_t pcr;
bool b_y4m;
} demux_sys_t;
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int Demux( demux_t * );
static int Control( demux_t *,
int i_query, va_list args );
struct preset_t
{
const char *psz_ext;
int i_width;
int i_height;
unsigned u_fps_num;
unsigned u_fps_den;
unsigned u_ar_num;
unsigned u_ar_den;
vlc_fourcc_t i_chroma;
};
static const struct preset_t p_presets[] =
{
{
"sqcif",
128,
96,
30000,
1001,
4,
3, VLC_CODEC_YV12 },
{
"qcif",
176,
144,
30000,
1001,
4,
3, VLC_CODEC_YV12 },
{
"cif",
352,
288,
30000,
1001,
4,
3, VLC_CODEC_YV12 },
{
"4cif",
704,
576,
30000,
1001,
4,
3, VLC_CODEC_YV12 },
{
"16cif",
1408,
1152,
30000,
1001,
4,
3, VLC_CODEC_YV12 },
{
"yuv",
176,
144,
25,
1,
4,
3, VLC_CODEC_YV12 },
{ NULL,
0,
0,
0,
0,
0,
0,
0 }
};
/*****************************************************************************
* Open: initializes raw DV demux structures
*****************************************************************************/
static int Open( vlc_object_t * p_this )
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys;
int i_width=-
1, i_height=-
1;
unsigned u_fps_num, u_fps_den;
vlc_fourcc_t i_chroma =
0;
unsigned int i_sar_num;
unsigned int i_sar_den;
const struct preset_t *p_preset = NULL;
const uint8_t *p_peek;
bool b_y4m =
false;
if( vlc_stream_Peek( p_demux->s, &p_peek,
9 ) ==
9 )
{
/* http://wiki.multimedia.cx/index.php?title=YUV4MPEG2 */
if( !strncmp( (
char *)p_peek,
"YUV4MPEG2",
9 ) )
{
b_y4m =
true;
goto valid;
}
}
if( !p_demux->obj.force )
{
/* guess preset based on file extension */
if( !p_demux->psz_filepath )
return VLC_EGENERIC;
const char *psz_ext = strrchr( p_demux->psz_filepath,
'.' );
if( !psz_ext )
return VLC_EGENERIC;
psz_ext++;
for(
unsigned i =
0; p_presets[i].psz_ext ; i++ )
{
if( !strcasecmp( psz_ext, p_presets[i].psz_ext ) )
{
p_preset = &p_presets[i];
goto valid;
}
}
return VLC_EGENERIC;
}
valid:
p_demux->p_sys = p_sys = malloc(
sizeof( demux_sys_t ) );
if( !p_sys )
return VLC_ENOMEM;
p_sys->b_y4m = b_y4m;
/* guess the parameters based on the preset */
if( p_preset )
{
i_width = p_preset->i_width;
i_height = p_preset->i_height;
u_fps_num = p_preset->u_fps_num;
u_fps_den = p_preset->u_fps_den;
i_sar_num = p_preset->u_ar_num * p_preset->i_height;
i_sar_den = p_preset->u_ar_den * p_preset->i_width;
i_chroma = p_preset->i_chroma;
}
/* override presets if yuv4mpeg2 */
if( b_y4m )
{
/* The string should start with "YUV4MPEG2" */
char *psz = vlc_stream_ReadLine( p_demux->s );
char *psz_buf;
int a =
1;
int b =
1;
if( unlikely(psz == NULL) )
goto error;
/* NB, it is not possible to handle interlaced here, since the
* interlaced picture flags are in picture_t not block_t */
#define READ_FRAC( key, num, den )
do { \
psz_buf = strstr( psz+
9, key );\
if( psz_buf )\
{\
char *end = strchr( psz_buf+
1,
' ' );\
char *sep;\
if( end ) *end =
'\0';\
sep = strchr( psz_buf+
1,
':' );\
if( sep )\
{\
*sep =
'\0';\
den = atoi( sep+
1 );\
}\
else\
{\
den =
1;\
}\
num = atoi( psz_buf+
2 );\
if( sep ) *sep =
':';\
if( end ) *end =
' ';\
} }
while(
0)
READ_FRAC(
" W", i_width, a );
READ_FRAC(
" H", i_height, a );
READ_FRAC(
" F", u_fps_num, u_fps_den );
READ_FRAC(
" A", a, b );
#undef READ_FRAC
if( b !=
0 )
{
i_sar_num = a;
i_sar_den = b;
}
psz_buf = strstr( psz+
9,
" C" );
if( psz_buf )
{
static const struct {
const char *psz_name; vlc_fourcc_t i_fcc; } formats[] =
{
{
"420jpeg", VLC_CODEC_I420 },
{
"420paldv", VLC_CODEC_I420 },
{
"420", VLC_CODEC_I420 },
{
"422", VLC_CODEC_I422 },
{
"444", VLC_CODEC_I444 },
{
"mono", VLC_CODEC_GREY },
{ NULL,
0 }
};
bool b_found =
false;
char *psz_end = strchr( psz_buf+
1,
' ' );
if( psz_end )
*psz_end =
'\0';
psz_buf +=
2;
for(
int i =
0; formats[i].psz_name != NULL; i++ )
{
if( !strncmp( psz_buf, formats[i].psz_name, strlen(formats[i].psz_name) ) )
{
i_chroma = formats[i].i_fcc;
b_found =
true;
break;
}
}
if( !b_found )
msg_Warn( p_demux,
"Unknown YUV4MPEG2 chroma type \"%s\
"", psz_buf );
if( psz_end )
*psz_end =
' ';
}
free( psz );
}
/* allow the user to override anything guessed from the input */
int i_tmp;
i_tmp = var_CreateGetInteger( p_demux,
"rawvid-width" );
if( i_tmp ) i_width = i_tmp;
i_tmp = var_CreateGetInteger( p_demux,
"rawvid-height" );
if( i_tmp ) i_height = i_tmp;
char *psz_tmp;
psz_tmp = var_CreateGetNonEmptyString( p_demux,
"rawvid-chroma" );
if( psz_tmp )
{
if( strlen( psz_tmp ) !=
4 )
{
msg_Err( p_demux,
"Invalid fourcc format/chroma specification %s"
" expecting four characters eg, UYVY", psz_tmp );
free( psz_tmp );
goto error;
}
memcpy( &i_chroma, psz_tmp,
4 );
msg_Dbg( p_demux,
"Forcing chroma to 0x%.8x (%4.4s)", i_chroma, (
char*)&i_chroma );
free( psz_tmp );
}
if( var_InheritURational( p_demux, &u_fps_num, &u_fps_den,
"rawvid-fps" ) )
{
u_fps_num =
0;
u_fps_den =
1;
}
if( var_InheritURational( p_demux, &i_sar_num, &i_sar_den,
"rawvid-aspect-ratio" ) )
i_sar_num = i_sar_den =
1;
/* moan about anything wrong */
if( i_width <=
0 || i_height <=
0 )
{
msg_Err( p_demux,
"width and height must be strictly positive." );
goto error;
}
if( !u_fps_num || !u_fps_den )
{
msg_Err( p_demux,
"invalid or no framerate specified." );
goto error;
}
if( i_chroma ==
0 )
{
msg_Err( p_demux,
"invalid or no chroma specified." );
goto error;
}
/* fixup anything missing with sensible assumptions */
if( i_sar_num <=
0 || i_sar_den <=
0 )
{
/* assume 1:1 sar */
i_sar_num =
1;
i_sar_den =
1;
}
es_format_Init( &p_sys->fmt_video, VIDEO_ES, i_chroma );
video_format_Setup( &p_sys->fmt_video.video, i_chroma,
i_width, i_height, i_width, i_height,
i_sar_num, i_sar_den );
vlc_ureduce( &p_sys->fmt_video.video.i_frame_rate,
&p_sys->fmt_video.video.i_frame_rate_base,
u_fps_num, u_fps_den,
0);
date_Init( &p_sys->pcr, p_sys->fmt_video.video.i_frame_rate,
p_sys->fmt_video.video.i_frame_rate_base );
date_Set( &p_sys->pcr, VLC_TICK_0 );
const vlc_chroma_description_t *dsc =
vlc_fourcc_GetChromaDescription(p_sys->fmt_video.video.i_chroma);
if (unlikely(dsc == NULL))
goto error;
if (dsc->plane_count ==
0)
{
msg_Err( p_demux,
"Unsupported chroma 0x%.8x (%4.4s)", i_chroma,
(
char*)&i_chroma );
goto error;
}
p_sys->frame_size =
0;
for (
unsigned i=
0; i<dsc->plane_count; i++)
{
unsigned pitch = ((i_width + (dsc->p[i].w.den -
1)) / dsc->p[i].w.den)
* dsc->p[i].w.num * dsc->pixel_size;
unsigned lines = ((i_height + (dsc->p[i].h.den -
1)) / dsc->p[i].h.den)
* dsc->p[i].h.num;
p_sys->frame_size += pitch * lines;
}
p_sys->p_es_video = es_out_Add( p_demux->out, &p_sys->fmt_video );
if( unlikely(!p_sys->p_es_video) )
goto error;
p_demux->pf_demux = Demux;
p_demux->pf_control = Control;
return VLC_SUCCESS;
error:
free( p_sys );
return VLC_EGENERIC;
}
/*****************************************************************************
* Close: frees unused data
*****************************************************************************/
static void Close( vlc_object_t *p_this )
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys = p_demux->p_sys;
free( p_sys );
}
/*****************************************************************************
* Demux: reads and demuxes data packets
*****************************************************************************
* Returns -1 in case of error, 0 in case of EOF, 1 otherwise
*****************************************************************************/
static int Demux( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
block_t *p_block;
vlc_tick_t i_pcr = date_Get( &p_sys->pcr );
/* Call the pace control */
es_out_SetPCR( p_demux->out, i_pcr );
if( p_sys->b_y4m )
{
/* Skip the frame header */
/* Skip "FRAME" */
if( vlc_stream_Read( p_demux->s, NULL,
5 ) !=
5 )
return VLC_DEMUXER_EOF;
/* Find \n */
for( ;; )
{
uint8_t b;
if( vlc_stream_Read( p_demux->s, &b,
1 ) <
1 )
return VLC_DEMUXER_EOF;
if( b ==
0x0a )
break;
}
}
p_block = vlc_stream_Block( p_demux->s, p_sys->frame_size );
if( p_block == NULL )
return VLC_DEMUXER_EOF;
p_block->i_dts = p_block->i_pts = i_pcr;
es_out_Send( p_demux->out, p_sys->p_es_video, p_block );
date_Increment( &p_sys->pcr,
1 );
return VLC_DEMUXER_SUCCESS;
}
/*****************************************************************************
* Control:
*****************************************************************************/
static int Control( demux_t *p_demux,
int i_query, va_list args )
{
demux_sys_t *p_sys = p_demux->p_sys;
/* (2**31)-1 is insufficient to store 1080p50 4:4:4. */
const int64_t i_bps =
8LL * p_sys->frame_size * p_sys->pcr.i_divider_num /
p_sys->pcr.i_divider_den;
/* XXX: DEMUX_SET_TIME is precise here */
return demux_vaControlHelper( p_demux->s,
0, -
1, i_bps,
p_sys->frame_size, i_query, args );
}