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