X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=modules%2Fcodec%2Fdvbsub.c;h=fb7619cfa4a22e54605cce34572b852095c48024;hb=c60652e38ac6afd74bd8225e9dae5406f13aaa4f;hp=3345eeb2e7e159dccfae9642face022177ad7e82;hpb=9d5e75a7a5643a2144dc561fc246a7a3ca7e5fb0;p=vlc diff --git a/modules/codec/dvbsub.c b/modules/codec/dvbsub.c index 3345eeb2e7..fb7619cfa4 100644 --- a/modules/codec/dvbsub.c +++ b/modules/codec/dvbsub.c @@ -3,7 +3,7 @@ * DVB subtitles encoder (developed for Anevia, www.anevia.com) ***************************************************************************** * Copyright (C) 2003 ANEVIA - * Copyright (C) 2003-2005 the VideoLAN team + * Copyright (C) 2003-2009 the VideoLAN team * $Id$ * * Authors: Gildas Bazin @@ -11,6 +11,7 @@ * Laurent Aimar * Jean-Paul Saman * Derk-Jan Hartman + * Simon Hailes * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -23,9 +24,10 @@ * GNU General Public License for more details. * * You should have received a copy of the GNU 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. + * along with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/ + /***************************************************************************** * Preamble * @@ -35,10 +37,36 @@ * character table identified in the subtitle descriptor. * * The spec is quite vague in this area, but what is meant is perhaps that it - * refers to the character index in the codepage belonging to the language specified - * in the subtitle descriptor. Potentially it's designed for widechar + * refers to the character index in the codepage belonging to the language + * specified in the subtitle descriptor. Potentially it's designed for widechar * (but not for UTF-*) codepages. - *****************************************************************************/ + ***************************************************************************** + * + ***************************************************************************** + * Notes on DDS (Display Definition Segment) + * ----------------------------------------- + * DDS (Display Definition Segment) tells the decoder how the subtitle image + * relates to the video image. + * For SD, the subtitle image is always considered to be for display at + * 720x576 (although it's assumed that for NTSC, this is 720x480, this + * is not documented well) Also, for SD, the subtitle image is drawn 'on + * the glass' (i.e. after video scaling, letterbox, etc.) + * For 'HD' (subs marked type 0x14/0x24 in PSI), a DDS must be present, + * and the subs area is drawn onto the video area (scales if necessary). + * The DDS tells the decoder what resolution the subtitle images were + * intended for, and hence how to scale the subtitle images for a + * particular video size + * i.e. if HD video is presented as letterbox, the subs will be in the + * same place on the video as if the video was presented on an HD set + * indeed, if the HD video was pillarboxed by the decoder, the subs may + * be cut off as well as the video. The intent here is that the subs can + * be placed accurately on the video - something which was missed in the + * original spec. + * + * A DDS may also specify a window - this is where the subs images are moved so that the (0,0) + * origin of decode is offset. + ********************************************************************************************/ + #ifdef HAVE_CONFIG_H # include "config.h" #endif @@ -48,7 +76,7 @@ #include #include -#include "vlc_bits.h" +#include /* #define DEBUG_DVBSUB 1 */ @@ -150,7 +178,8 @@ typedef struct dvbsub_display_s int i_width; int i_height; - bool b_windowed; + bool b_windowed; + /* these values are only relevant if windowed */ int i_x; int i_y; int i_max_x; @@ -218,24 +247,25 @@ typedef struct struct decoder_sys_t { - bs_t bs; + bs_t bs; /* Decoder internal data */ - int i_id; - int i_ancillary_id; - mtime_t i_pts; - - bool b_absolute; - int i_spu_position; - int i_spu_x; - int i_spu_y; - - bool b_page; - dvbsub_page_t *p_page; - dvbsub_region_t *p_regions; - dvbsub_clut_t *p_cluts; - dvbsub_display_t *p_display; - dvbsub_clut_t default_clut; + int i_id; + int i_ancillary_id; + mtime_t i_pts; + + bool b_absolute; + int i_spu_position; + int i_spu_x; + int i_spu_y; + + bool b_page; + dvbsub_page_t *p_page; + dvbsub_region_t *p_regions; + dvbsub_clut_t *p_cluts; + /* this is very small, so keep forever */ + dvbsub_display_t display; + dvbsub_clut_t default_clut; }; @@ -279,6 +309,7 @@ static void decode_clut( decoder_t *, bs_t * ); static void free_all( decoder_t * ); static void default_clut_init( decoder_t * ); +static void default_dds_init( decoder_t * ); static subpicture_t *render( decoder_t * ); @@ -292,7 +323,6 @@ static int Open( vlc_object_t *p_this ) { decoder_t *p_dec = (decoder_t *) p_this; decoder_sys_t *p_sys; - vlc_value_t val; int i_posx, i_posy; if( p_dec->fmt_in.i_codec != VLC_CODEC_DVBS ) @@ -301,32 +331,25 @@ static int Open( vlc_object_t *p_this ) } p_dec->pf_decode_sub = Decode; - p_sys = p_dec->p_sys = malloc( sizeof(decoder_sys_t) ); + p_sys = p_dec->p_sys = calloc( 1, sizeof(decoder_sys_t) ); if( !p_sys ) return VLC_ENOMEM; - memset( p_sys, 0, sizeof(decoder_sys_t) ); - p_sys->i_pts = (mtime_t) 0; + p_sys->i_pts = VLC_TS_INVALID; p_sys->i_id = p_dec->fmt_in.subs.dvb.i_id & 0xFFFF; p_sys->i_ancillary_id = p_dec->fmt_in.subs.dvb.i_id >> 16; p_sys->p_regions = NULL; p_sys->p_cluts = NULL; p_sys->p_page = NULL; - p_sys->p_display = NULL; - - var_Create( p_this, DVBSUB_CFG_PREFIX "position", - VLC_VAR_INTEGER | VLC_VAR_DOINHERIT ); - var_Get( p_this, DVBSUB_CFG_PREFIX "position", &val ); - p_sys->i_spu_position = val.i_int; - var_Create( p_this, DVBSUB_CFG_PREFIX "x", - VLC_VAR_INTEGER | VLC_VAR_DOINHERIT ); - var_Get( p_this, DVBSUB_CFG_PREFIX "x", &val ); - i_posx = val.i_int; - var_Create( p_this, DVBSUB_CFG_PREFIX "y", - VLC_VAR_INTEGER | VLC_VAR_DOINHERIT ); - var_Get( p_this, DVBSUB_CFG_PREFIX "y", &val ); - i_posy = val.i_int; + + /* configure for SD res in case DDS is not present */ + default_dds_init( p_dec ); + + p_sys->i_spu_position = var_CreateGetInteger( p_this, + DVBSUB_CFG_PREFIX "position" ); + i_posx = var_CreateGetInteger( p_this, DVBSUB_CFG_PREFIX "x" ); + i_posy = var_CreateGetInteger( p_this, DVBSUB_CFG_PREFIX "y" ); /* Check if subpicture position was overridden */ p_sys->b_absolute = true; @@ -376,8 +399,13 @@ static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block ) p_block = *pp_block; *pp_block = NULL; + /* configure for SD res in case DDS is not present */ + /* a change of PTS is a good indication we must get a new DDS */ + if (p_sys->i_pts != p_block->i_pts) + default_dds_init( p_dec ); + p_sys->i_pts = p_block->i_pts; - if( p_sys->i_pts <= 0 ) + if( p_sys->i_pts <= VLC_TS_INVALID ) { #ifdef DEBUG_DVBSUB /* Some DVB channels send stuffing segments in non-dated packets so @@ -838,10 +866,9 @@ static void decode_region_composition( decoder_t *p_dec, bs_t *s ) #ifdef DEBUG_DVBSUB msg_Dbg( p_dec, "new region: %i", i_id ); #endif - p_region = *pp_region = malloc( sizeof(dvbsub_region_t) ); + p_region = *pp_region = calloc( 1, sizeof(dvbsub_region_t) ); if( !p_region ) return; - memset( p_region, 0, sizeof(dvbsub_region_t) ); p_region->p_object_defs = NULL; p_region->p_pixbuf = NULL; p_region->p_next = NULL; @@ -886,7 +913,7 @@ static void decode_region_composition( decoder_t *p_dec, bs_t *s ) free( p_region->p_pixbuf ); } - p_region->p_pixbuf = malloc( i_height * i_width ); + p_region->p_pixbuf = xmalloc( i_height * i_width ); p_region->i_depth = 0; b_fill = true; } @@ -920,8 +947,7 @@ static void decode_region_composition( decoder_t *p_dec, bs_t *s ) /* We create a new object */ p_region->i_object_defs++; - p_region->p_object_defs = - realloc( p_region->p_object_defs, + p_region->p_object_defs = xrealloc( p_region->p_object_defs, sizeof(dvbsub_objectdef_t) * p_region->i_object_defs ); /* We parse object properties */ @@ -952,15 +978,13 @@ static void decode_display_definition( decoder_t *p_dec, bs_t *s ) decoder_sys_t *p_sys = p_dec->p_sys; uint16_t i_segment_length; uint16_t i_processed_length = 40; - dvbsub_display_t *p_display; - dvbsub_display_t *p_old = p_sys->p_display; int i_version; i_segment_length = bs_read( s, 16 ); i_version = bs_read( s, 4 ); /* Check version number */ - if( p_old && ( p_old->i_version == i_version ) ) + if( p_sys->display.i_version == i_version ) { /* The definition did not change */ bs_skip( s, 8*i_segment_length - 4 ); @@ -970,45 +994,48 @@ static void decode_display_definition( decoder_t *p_dec, bs_t *s ) #ifdef DEBUG_DVBSUB msg_Dbg( p_dec, "new display definition: %i", i_version ); #endif - p_display = malloc( sizeof(dvbsub_display_t) ); - if( p_display ) - { - /* We don't have this version of the display definition: Parse it */ - p_display->i_version = i_version; - p_display->b_windowed = bs_read( s, 1 ); - bs_skip( s, 3 ); /* Reserved bits */ - p_display->i_width = bs_read( s, 16 )+1; - p_display->i_height = bs_read( s, 16 )+1; - if( p_display->b_windowed ) - { + /* We don't have this version of the display definition: Parse it */ + p_sys->display.i_version = i_version; + p_sys->display.b_windowed = bs_read( s, 1 ); + bs_skip( s, 3 ); /* Reserved bits */ + p_sys->display.i_width = bs_read( s, 16 )+1; + p_sys->display.i_height = bs_read( s, 16 )+1; + + if( p_sys->display.b_windowed ) + { #ifdef DEBUG_DVBSUB - msg_Dbg( p_dec, "display definition with offsets (windowed)" ); + msg_Dbg( p_dec, "display definition with offsets (windowed)" ); #endif - /* Coordinates are measured from the top left corner */ - p_display->i_x = bs_read( s, 16 ); - p_display->i_max_x = bs_read( s, 16 ); - p_display->i_y = bs_read( s, 16 ); - p_display->i_max_y = bs_read( s, 16 ); - i_processed_length += 64; - } + /* Coordinates are measured from the top left corner */ + p_sys->display.i_x = bs_read( s, 16 ); + p_sys->display.i_max_x = bs_read( s, 16 ); + p_sys->display.i_y = bs_read( s, 16 ); + p_sys->display.i_max_y = bs_read( s, 16 ); + i_processed_length += 64; + } + else + { + /* if not windowed, setup the window variables to good defaults */ + /* not necessary, but to avoid future confusion.. */ + p_sys->display.i_x = 0; + p_sys->display.i_max_x = p_sys->display.i_width-1; + p_sys->display.i_y = 0; + p_sys->display.i_max_y = p_sys->display.i_height-1; } - - p_sys->p_display = p_display; - free( p_old ); if( i_processed_length != i_segment_length*8 ) { - msg_Err( p_dec, "processed length %d != segment length %d", - i_processed_length, i_segment_length ); + msg_Err( p_dec, "processed length %d bytes != segment length %d bytes", + i_processed_length / 8 , i_segment_length ); } #ifdef DEBUG_DVBSUB msg_Dbg( p_dec, "version: %d, width: %d, height: %d", - p_display->i_version, p_display->i_width, p_display->i_height ); - if( p_display->b_windowed ) + p_sys->display.i_version, p_sys->display.i_width, p_sys->display.i_height ); + if( p_sys->display.b_windowed ) msg_Dbg( p_dec, "xmin: %d, xmax: %d, ymin: %d, ymax: %d", - p_display->i_x, p_display->i_max_x, p_display->i_y, p_display->i_max_y ); + p_sys->display.i_x, p_sys->display.i_max_x, p_sys->display.i_y, p_sys->display.i_max_y ); #endif } @@ -1137,7 +1164,7 @@ static void decode_object( decoder_t *p_dec, bs_t *s ) if( p_region->p_object_defs[i].i_id != i_id ) continue; p_region->p_object_defs[i].psz_text = - realloc( p_region->p_object_defs[i].psz_text, + xrealloc( p_region->p_object_defs[i].psz_text, i_number_of_codes + 1 ); /* FIXME 16bits -> char ??? See Preamble */ @@ -1409,7 +1436,7 @@ static void free_all( decoder_t *p_dec ) dvbsub_region_t *p_reg, *p_reg_next; dvbsub_clut_t *p_clut, *p_clut_next; - free( p_sys->p_display ); + /*free( p_sys->p_display ); No longer malloced */ for( p_clut = p_sys->p_cluts; p_clut != NULL; p_clut = p_clut_next ) { @@ -1450,17 +1477,18 @@ static subpicture_t *render( decoder_t *p_dec ) int i_base_y; /* Allocate the subpicture internal data. */ - p_spu = decoder_NewSubpicture( p_dec ); + p_spu = decoder_NewSubpicture( p_dec, NULL ); if( !p_spu ) return NULL; p_spu->b_absolute = p_sys->b_absolute; /* Set the pf_render callback */ - p_spu->i_start = (mtime_t) p_sys->i_pts; + p_spu->i_start = p_sys->i_pts; //p_spu->i_stop = (mtime_t) 0; p_spu->b_ephemer = true; //p_spu->b_fade = true; //p_spu->i_stop = p_spu->i_start + (mtime_t) (i_timeout * 1000000); + p_spu->b_subtitle = true; /* Correct positioning of SPU */ i_base_x = p_sys->i_spu_x; @@ -1468,19 +1496,21 @@ static subpicture_t *render( decoder_t *p_dec ) p_spu->i_original_picture_width = 720; p_spu->i_original_picture_height = 576; - if( p_sys->p_display ) + p_spu->i_original_picture_width = p_sys->display.i_width; + p_spu->i_original_picture_height = p_sys->display.i_height; + + if( p_sys->display.b_windowed ) { - p_spu->i_original_picture_width = p_sys->p_display->i_width; - p_spu->i_original_picture_height = p_sys->p_display->i_height; + /* From en_300743v01 - */ + /* the DDS is there to indicate intended size/position of text */ + /* the intended video area is ->i_width/height */ + /* the window is within this... SO... we should leave i_original_picture_width etc. as is */ + /* and ONLY change i_base_x. effectively i_max_x/y are only there to limit memory requirements*/ + /* we COULD use the upper limits to limit rendering to within these? */ - if( p_sys->p_display->b_windowed ) - { - /* TODO: check that this actually works */ - p_spu->i_original_picture_width = p_sys->p_display->i_max_x - p_sys->p_display->i_x; - p_spu->i_original_picture_height = p_sys->p_display->i_max_y - p_sys->p_display->i_y; - i_base_x += p_sys->p_display->i_x; - i_base_y += p_sys->p_display->i_y; - } + /* see notes on DDS at the top of the file */ + i_base_x += p_sys->display.i_x; + i_base_y += p_sys->display.i_y; } pp_spu_region = &p_spu->p_region; @@ -1507,11 +1537,6 @@ static subpicture_t *render( decoder_t *p_dec ) p_regiondef = &p_sys->p_page->p_region_defs[i]; -#ifdef DEBUG_DVBSUB - msg_Dbg( p_dec, "rendering region %i (%i,%i)", i, - p_regiondef->i_x, p_regiondef->i_y ); -#endif - /* Find associated region */ for( p_region = p_sys->p_regions; p_region != NULL; p_region = p_region->p_next ) @@ -1519,6 +1544,22 @@ static subpicture_t *render( decoder_t *p_dec ) if( p_regiondef->i_id == p_region->i_id ) break; } +#ifdef DEBUG_DVBSUB + /* if a region exists, then print it's size */ + if (p_region) + { + msg_Dbg( p_dec, "rendering region %i (%i,%i) to (%i,%i)", i, + p_regiondef->i_x, p_regiondef->i_y, + p_regiondef->i_x + p_region->i_width, + p_regiondef->i_y + p_region->i_height ); + } + else + { + msg_Dbg( p_dec, "rendering region %i (%i,%i) (no region matched to render)", i, + p_regiondef->i_x, p_regiondef->i_y ); + } +#endif + if( !p_region ) { msg_Dbg( p_dec, "region %i not found", p_regiondef->i_id ); @@ -1536,13 +1577,14 @@ static subpicture_t *render( decoder_t *p_dec ) continue; } - /* FIXME: don't create a subpicture region with VLC CODEC YUVP + /* FIXME: don't create a subpicture region with VLC CODEC YUVP * when it actually is a TEXT region */ /* Create new SPU region */ memset( &fmt, 0, sizeof(video_format_t) ); fmt.i_chroma = VLC_CODEC_YUVP; - fmt.i_aspect = 0; /* 0 means use aspect ratio of background video */ + fmt.i_sar_num = 0; /* 0 means use aspect ratio of background video */ + fmt.i_sar_den = 1; fmt.i_width = fmt.i_visible_width = p_region->i_width; fmt.i_height = fmt.i_visible_height = p_region->i_height; fmt.i_x_offset = fmt.i_y_offset = 0; @@ -1595,16 +1637,12 @@ static subpicture_t *render( decoder_t *p_dec ) /* Create new SPU region */ memset( &fmt, 0, sizeof(video_format_t) ); fmt.i_chroma = VLC_CODEC_TEXT; - fmt.i_aspect = VOUT_ASPECT_FACTOR; + fmt.i_sar_num = 1; + fmt.i_sar_den = 1; fmt.i_width = fmt.i_visible_width = p_region->i_width; fmt.i_height = fmt.i_visible_height = p_region->i_height; fmt.i_x_offset = fmt.i_y_offset = 0; p_spu_region = subpicture_region_New( &fmt ); - if( !p_region ) - { - msg_Err( p_dec, "cannot allocate SPU region" ); - continue; - } p_spu_region->psz_text = strdup( p_object_def->psz_text ); p_spu_region->i_x = i_base_x + p_regiondef->i_x + p_object_def->i_x; @@ -1656,7 +1694,6 @@ static int OpenEncoder( vlc_object_t *p_this ) { encoder_t *p_enc = (encoder_t *)p_this; encoder_sys_t *p_sys; - vlc_value_t val; if( ( p_enc->fmt_out.i_codec != VLC_CODEC_DVBS ) && !p_enc->b_force ) @@ -1681,12 +1718,8 @@ static int OpenEncoder( vlc_object_t *p_this ) p_sys->i_regions = 0; p_sys->p_regions = 0; - var_Create( p_this, ENC_CFG_PREFIX "x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT ); - var_Get( p_this, ENC_CFG_PREFIX "x", &val ); - p_sys->i_offset_x = val.i_int; - var_Create( p_this, ENC_CFG_PREFIX "y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT ); - var_Get( p_this, ENC_CFG_PREFIX "y", &val ); - p_sys->i_offset_y = val.i_int; + p_sys->i_offset_x = var_CreateGetInteger( p_this, ENC_CFG_PREFIX "x" ); + p_sys->i_offset_y = var_CreateGetInteger( p_this, ENC_CFG_PREFIX "y" ); return VLC_SUCCESS; } @@ -1718,7 +1751,8 @@ static subpicture_t *YuvaYuvp( subpicture_t *p_subpic ) + p_region->p_picture->p[0].i_pitch * 1 / 3; int i_tolerance = 0; -#ifdef DEBUG_DVBSUB +#ifdef DEBUG_DVBSUB1 + /* p_enc not valid here */ msg_Dbg( p_enc, "YuvaYuvp: i_pixels=%d, i_iterator=%d", i_pixels, i_iterator ); #endif p_fmt->i_chroma = VLC_CODEC_YUVP; @@ -1795,12 +1829,13 @@ static subpicture_t *YuvaYuvp( subpicture_t *p_subpic ) } } -#ifdef DEBUG_DVBSUB +#ifdef DEBUG_DVBSUB1 + /* p_enc not valid here */ msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries ); #endif #ifndef RANDOM_DITHERING - pi_delta = malloc( ( p_region->p_picture->p[0].i_pitch + 1 ) + pi_delta = xmalloc( ( p_region->p_picture->p[0].i_pitch + 1 ) * sizeof(int) * 4 ); for( i = 0; i < (p_region->p_picture->p[0].i_pitch + 1) * 4 ; i++ ) { @@ -1889,7 +1924,8 @@ static subpicture_t *YuvaYuvp( subpicture_t *p_subpic ) p_fmt->p_palette->palette[i][3] = 0; } p_fmt->p_palette->i_entries = i_max_entries; -#ifdef DEBUG_DVBSUB +#ifdef DEBUG_DVBSUB1 + /* p_enc not valid here */ msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries ); #endif } @@ -1932,7 +1968,7 @@ static block_t *Encode( encoder_t *p_enc, subpicture_t *p_subpic ) char psz_fourcc[5]; memset( &psz_fourcc, 0, sizeof( psz_fourcc ) ); vlc_fourcc_to_char( p_region->fmt.i_chroma, &psz_fourcc ); - msg_Err( p_enc, "chroma %4s not supported", psz_fourcc ); + msg_Err( p_enc, "chroma %4.4s not supported", psz_fourcc ); return NULL; } @@ -2039,9 +2075,8 @@ static void encode_page_composition( encoder_t *p_enc, bs_t *s, { encoder_region_t region; region.i_width = region.i_height = 0; - p_sys->p_regions = - realloc( p_sys->p_regions, sizeof(encoder_region_t) * - (p_sys->i_regions + 1) ); + p_sys->p_regions = xrealloc( p_sys->p_regions, + sizeof(encoder_region_t) * (p_sys->i_regions + 1) ); p_sys->p_regions[p_sys->i_regions++] = region; } @@ -2608,3 +2643,18 @@ static void encode_pixel_line_8bp( bs_t *s, subpicture_region_t *p_region, /* Stuffing */ bs_align_0( s ); } + + +static void default_dds_init( decoder_t * p_dec ) +{ + decoder_sys_t *p_sys = p_dec->p_sys; + + /* see notes on DDS at the top of the file */ + + /* configure for SD res in case DDS is not present */ + p_sys->display.i_version = 0xff; /* an invalid version so it's always different */ + p_sys->display.i_width = 720; + p_sys->display.i_height = 576; + p_sys->display.b_windowed = false; +} +