/modules/demux/rawvid.c
C | 439 lines | 314 code | 57 blank | 68 comment | 51 complexity | 6b1f7a374fc87a6e453507d0ec53bec2 MD5 | raw file
- /*****************************************************************************
- * rawvid.c : raw video input module for vlc
- *****************************************************************************
- * Copyright (C) 2007 VLC authors and VideoLAN
- * $Id: 11d27a145bb1dc1134d78a354482816b79cf89de $
- *
- * 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>
- #include <assert.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_category( CAT_INPUT )
- set_subcategory( SUBCAT_INPUT_DEMUX )
- set_callbacks( Open, Close )
- add_shortcut( "rawvideo" )
- add_string( "rawvid-fps", NULL, FPS_TEXT, FPS_LONGTEXT, false )
- add_integer( "rawvid-width", 0, WIDTH_TEXT, WIDTH_LONGTEXT, 0 )
- add_integer( "rawvid-height", 0, HEIGHT_TEXT, HEIGHT_LONGTEXT, 0 )
- add_string( "rawvid-chroma", NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
- true )
- add_string( "rawvid-aspect-ratio", NULL,
- ASPECT_RATIO_TEXT, ASPECT_RATIO_LONGTEXT, true )
- vlc_module_end ()
- /*****************************************************************************
- * Definitions of structures used by this plugin
- *****************************************************************************/
- struct demux_sys_t
- {
- int frame_size;
- es_out_id_t *p_es_video;
- es_format_t fmt_video;
- date_t pcr;
- bool b_y4m;
- };
- /*****************************************************************************
- * 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_file )
- return VLC_EGENERIC;
- const char *psz_ext = strrchr( p_demux->psz_file, '.' );
- 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, 0 );
- if( !p_sys->fmt_video.video.i_bits_per_pixel )
- {
- msg_Err( p_demux, "Unsupported chroma 0x%.8x (%4.4s)", i_chroma,
- (char*)&i_chroma );
- goto error;
- }
- p_sys->frame_size = i_width * i_height
- * p_sys->fmt_video.video.i_bits_per_pixel / 8;
- p_sys->p_es_video = es_out_Add( p_demux->out, &p_sys->fmt_video );
- p_demux->pf_demux = Demux;
- p_demux->pf_control = Control;
- return VLC_SUCCESS;
- error:
- /* workaround, but y4m uses vlc_stream_ReadLine */
- vlc_stream_Seek( p_demux->s, 0 );
- 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;
- mtime_t i_pcr = date_Get( &p_sys->pcr );
- /* Call the pace control */
- es_out_Control( p_demux->out, ES_OUT_SET_PCR, VLC_TS_0 + i_pcr );
- if( p_sys->b_y4m )
- {
- /* Skip the frame header */
- /* Skip "FRAME" */
- if( vlc_stream_Read( p_demux->s, NULL, 5 ) < 5 )
- return 0;
- /* Find \n */
- for( ;; )
- {
- uint8_t b;
- if( vlc_stream_Read( p_demux->s, &b, 1 ) < 1 )
- return 0;
- if( b == 0x0a )
- break;
- }
- }
- p_block = vlc_stream_Block( p_demux->s, p_sys->frame_size );
- if( p_block == NULL )
- {
- /* EOF */
- return 0;
- }
- p_block->i_dts = p_block->i_pts = VLC_TS_0 + i_pcr;
- es_out_Send( p_demux->out, p_sys->p_es_video, p_block );
- date_Increment( &p_sys->pcr, 1 );
- return 1;
- }
- /*****************************************************************************
- * 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 );
- }