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vlc/modules/codec/libass.c

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/*****************************************************************************
* SSA/ASS subtitle decoder using libass.
*****************************************************************************
* Copyright (C) 2008-2009 VLC authors and VideoLAN
*
* Authors: Laurent Aimar <fenrir@videolan.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 <string.h>
#include <limits.h>
#include <assert.h>
#include <math.h>
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_codec.h>
#include <vlc_input.h>
#include <vlc_dialog.h>
#include <vlc_stream.h>
#include <ass/ass.h>
#if LIBASS_VERSION < 0x01300000
# define ASS_FONTPROVIDER_AUTODETECT 1
#endif
#if defined(_WIN32)
# include <vlc_charset.h>
#endif
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int Create ( vlc_object_t * );
static void Destroy( vlc_object_t * );
#define TEXT_SSA_FONTSDIR N_("Additional fonts directory")
vlc_module_begin ()
set_shortname( N_("Subtitles (advanced)"))
set_description( N_("Subtitle renderers using libass") )
set_capability( "spu decoder", 100 )
set_subcategory( SUBCAT_INPUT_SCODEC )
set_callbacks( Create, Destroy )
add_string("ssa-fontsdir", NULL, TEXT_SSA_FONTSDIR, NULL)
vlc_module_end ()
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int DecodeBlock( decoder_t *, block_t * );
static void Flush( decoder_t * );
/* */
typedef struct
{
vlc_tick_t i_last_pts;
vlc_tick_t i_max_stop;
/* The following fields of decoder_sys_t are shared between decoder and spu units */
vlc_mutex_t lock;
int i_refcount;
/* */
vlc_object_t *p_obj;
ASS_Library *p_library;
ASS_Renderer *p_renderer;
/* */
ASS_Track *p_track;
} decoder_sys_t;
static void DecSysRelease( decoder_sys_t *p_sys );
static void DecSysHold( decoder_sys_t *p_sys );
/* */
static void SubpictureUpdate( subpicture_t *,
const video_format_t *, const video_format_t *,
const video_format_t *, const video_format_t *,
vlc_tick_t );
static void SubpictureDestroy( subpicture_t * );
typedef struct
{
decoder_sys_t *p_dec_sys;
vlc_tick_t i_pts;
} libass_spu_updater_sys_t;
typedef struct
{
int x0;
int y0;
int x1;
int y1;
} rectangle_t;
static int BuildRegions( rectangle_t *p_region, int i_max_region, ASS_Image *p_img_list, int i_width, int i_height );
static void RegionDraw( subpicture_region_t *p_region, ASS_Image *p_img );
static void OldEngineClunkyRollInfoPatch( decoder_t *p_dec, ASS_Track * );
//#define DEBUG_REGION
/*****************************************************************************
* Create: Open libass decoder.
*****************************************************************************/
static int Create( vlc_object_t *p_this )
{
decoder_t *p_dec = (decoder_t *)p_this;
decoder_sys_t *p_sys;
if( p_dec->fmt_in->i_codec != VLC_CODEC_SSA )
return VLC_EGENERIC;
p_dec->pf_decode = DecodeBlock;
p_dec->pf_flush = Flush;
p_dec->p_sys = p_sys = malloc( sizeof( decoder_sys_t ) );
if( !p_sys )
return VLC_ENOMEM;
/* */
vlc_mutex_init( &p_sys->lock );
p_sys->i_refcount = 1;
p_sys->i_last_pts = VLC_TICK_INVALID;
p_sys->i_max_stop = VLC_TICK_INVALID;
p_sys->p_library = NULL;
p_sys->p_renderer = NULL;
p_sys->p_track = NULL;
/* Create libass library */
ASS_Library *p_library = p_sys->p_library = ass_library_init();
if( !p_library )
{
msg_Warn( p_dec, "Libass library creation failed" );
DecSysRelease( p_sys );
return VLC_EGENERIC;
}
/* load attachments */
input_attachment_t **pp_attachments;
int i_attachments;
if( decoder_GetInputAttachments( p_dec, &pp_attachments, &i_attachments ))
{
i_attachments = 0;
pp_attachments = NULL;
}
for( int k = 0; k < i_attachments; k++ )
{
input_attachment_t *p_attach = pp_attachments[k];
bool found = false;
/* Check mimetype*/
if( !strcasecmp( p_attach->psz_mime, "application/x-truetype-font" ) )
found = true;
/* Then extension */
else if( !found && strnlen( p_attach->psz_name, 4+1 ) > 4 )
{
char *ext = p_attach->psz_name + strlen( p_attach->psz_name ) - 4;
if( !strcasecmp( ext, ".ttf" ) || !strcasecmp( ext, ".otf" ) || !strcasecmp( ext, ".ttc" ) )
found = true;
}
if( found )
{
msg_Dbg( p_dec, "adding embedded font %s", p_attach->psz_name );
ass_add_font( p_sys->p_library, p_attach->psz_name, p_attach->p_data, p_attach->i_data );
}
vlc_input_attachment_Release( p_attach );
}
free( pp_attachments );
char *psz_fontsdir = var_InheritString( p_dec, "ssa-fontsdir" );
if( psz_fontsdir )
{
ass_set_fonts_dir( p_library, psz_fontsdir );
free( psz_fontsdir );
}
ass_set_extract_fonts( p_library, true );
ass_set_style_overrides( p_library, NULL );
/* Create the renderer */
ASS_Renderer *p_renderer = p_sys->p_renderer = ass_renderer_init( p_library );
if( !p_renderer )
{
msg_Warn( p_dec, "Libass renderer creation failed" );
DecSysRelease( p_sys );
return VLC_EGENERIC;
}
ass_set_use_margins( p_renderer, false);
//if( false )
// ass_set_margins( p_renderer, int t, int b, int l, int r);
ass_set_font_scale( p_renderer, 1.0 );
ass_set_line_spacing( p_renderer, 0.0 );
#if defined( __ANDROID__ )
const char *psz_font, *psz_family;
const char *psz_font_droid = "/system/fonts/DroidSans-Bold.ttf";
const char *psz_family_droid = "Droid Sans Bold";
const char *psz_font_noto = "/system/fonts/NotoSansCJK-Regular.ttc";
const char *psz_family_noto = "Noto Sans";
// Workaround for Android 5.0+, since libass doesn't parse the XML yet
if( access( psz_font_noto, R_OK ) != -1 )
{
psz_font = psz_font_noto;
psz_family = psz_family_noto;
}
else
{
psz_font = psz_font_droid;
psz_family = psz_family_droid;
}
#elif defined( __APPLE__ )
const char *psz_font = NULL; /* We don't ship a default font with VLC */
const char *psz_family = "Helvetica Neue"; /* Use HN if we can't find anything more suitable - Arial is not on all Apple platforms */
#else
const char *psz_font = NULL; /* We don't ship a default font with VLC */
const char *psz_family = "Arial"; /* Use Arial if we can't find anything more suitable */
#endif
#ifdef HAVE_FONTCONFIG
#if defined(_WIN32)
vlc_dialog_id *p_dialog_id =
vlc_dialog_display_progress( p_dec, true, 0.0, NULL,
_("Building font cache"),
_( "Please wait while your font cache is rebuilt.\n"
"This should take less than a minute." ) );
#endif
ass_set_fonts( p_renderer, psz_font, psz_family, ASS_FONTPROVIDER_AUTODETECT, NULL, 1 ); // setup default font/family
#if defined(_WIN32)
if( p_dialog_id != 0 )
vlc_dialog_release( p_dec, p_dialog_id );
#endif
#else
ass_set_fonts( p_renderer, psz_font, psz_family, ASS_FONTPROVIDER_AUTODETECT, NULL, 0 );
#endif
/* Anything else than NONE will break smooth img updating.
TODO: List and force ASS_HINTING_LIGHT for known problematic fonts */
ass_set_hinting( p_renderer, ASS_HINTING_NONE );
/* Add a track */
ASS_Track *p_track = p_sys->p_track = ass_new_track( p_sys->p_library );
if( !p_track )
{
DecSysRelease( p_sys );
return VLC_EGENERIC;
}
ass_process_codec_private( p_track, p_dec->fmt_in->p_extra, p_dec->fmt_in->i_extra );
OldEngineClunkyRollInfoPatch( p_dec, p_track );
p_sys->p_obj = VLC_OBJECT(p_dec);
p_dec->fmt_out.i_codec = VLC_CODEC_RGBA;
return VLC_SUCCESS;
}
/*****************************************************************************
* Destroy: finish
*****************************************************************************/
static void Destroy( vlc_object_t *p_this )
{
decoder_t *p_dec = (decoder_t *)p_this;
DecSysRelease( p_dec->p_sys );
}
static void DecSysHold( decoder_sys_t *p_sys )
{
vlc_mutex_lock( &p_sys->lock );
p_sys->i_refcount++;
vlc_mutex_unlock( &p_sys->lock );
}
static void DecSysRelease( decoder_sys_t *p_sys )
{
/* */
vlc_mutex_lock( &p_sys->lock );
p_sys->p_obj = NULL;
p_sys->i_refcount--;
if( p_sys->i_refcount > 0 )
{
vlc_mutex_unlock( &p_sys->lock );
return;
}
vlc_mutex_unlock( &p_sys->lock );
if( p_sys->p_track )
ass_free_track( p_sys->p_track );
if( p_sys->p_renderer )
ass_renderer_done( p_sys->p_renderer );
if( p_sys->p_library )
ass_library_done( p_sys->p_library );
free( p_sys );
}
/*****************************************************************************
* Flush:
*****************************************************************************/
static void Flush( decoder_t *p_dec )
{
decoder_sys_t *p_sys = p_dec->p_sys;
p_sys->i_max_stop = VLC_TICK_INVALID;
p_sys->i_last_pts = VLC_TICK_INVALID;
}
/****************************************************************************
* DecodeBlock:
****************************************************************************/
static int DecodeBlock( decoder_t *p_dec, block_t *p_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
subpicture_t *p_spu = NULL;
if( p_block == NULL ) /* No Drain */
return VLCDEC_SUCCESS;
if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
{
Flush( p_dec );
block_Release( p_block );
return VLCDEC_SUCCESS;
}
if( p_block->i_buffer == 0 || p_block->p_buffer[0] == '\0' )
{
block_Release( p_block );
return VLCDEC_SUCCESS;
}
if( p_block->i_pts != p_sys->i_last_pts )
{
libass_spu_updater_sys_t *p_spu_sys = malloc( sizeof(*p_spu_sys) );
if( !p_spu_sys )
{
block_Release( p_block );
return VLCDEC_SUCCESS;
}
static const struct vlc_spu_updater_ops spu_ops =
{
.update = SubpictureUpdate,
.destroy = SubpictureDestroy,
};
subpicture_updater_t updater = {
.sys = p_spu_sys,
.ops = &spu_ops,
};
p_spu = decoder_NewSubpicture( p_dec, &updater );
if( !p_spu )
{
msg_Warn( p_dec, "can't get spu buffer" );
free( p_spu_sys );
block_Release( p_block );
return VLCDEC_SUCCESS;
}
p_spu_sys->p_dec_sys = p_sys;
p_spu_sys->i_pts = p_block->i_pts;
p_spu->i_start = p_block->i_pts;
p_spu->i_stop = __MAX( p_sys->i_max_stop, p_block->i_pts + p_block->i_length );
p_spu->b_ephemer = true;
p_sys->i_max_stop = p_spu->i_stop;
DecSysHold( p_sys ); /* Keep a reference for the returned subpicture */
}
p_sys->i_last_pts = p_block->i_pts;
vlc_mutex_lock( &p_sys->lock );
if( p_sys->p_track )
{
ass_process_chunk( p_sys->p_track,(void *) p_block->p_buffer, p_block->i_buffer,
MS_FROM_VLC_TICK( p_block->i_pts ), MS_FROM_VLC_TICK( p_block->i_length ) );
}
vlc_mutex_unlock( &p_sys->lock );
block_Release( p_block );
if( p_spu )
decoder_QueueSub( p_dec, p_spu );
return VLCDEC_SUCCESS;
}
/****************************************************************************
*
****************************************************************************/
static void SubpictureUpdate( subpicture_t *p_subpic,
const video_format_t *prev_src, const video_format_t *p_fmt_src,
const video_format_t *prev_dst, const video_format_t *p_fmt_dst,
vlc_tick_t i_ts )
{
libass_spu_updater_sys_t *p_spusys = p_subpic->updater.sys;
decoder_sys_t *p_sys = p_spusys->p_dec_sys;
bool b_fmt_src = p_fmt_src->i_visible_width != prev_src->i_visible_width ||
p_fmt_src->i_visible_height != prev_src->i_visible_height;
bool b_fmt_dst = !video_format_IsSimilar(prev_dst, p_fmt_dst);
vlc_mutex_lock( &p_sys->lock );
if( b_fmt_src || b_fmt_dst )
{
ass_set_frame_size( p_sys->p_renderer, p_fmt_dst->i_visible_width, p_fmt_dst->i_visible_height );
#if LIBASS_VERSION > 0x01010000
ass_set_storage_size( p_sys->p_renderer, p_fmt_src->i_visible_width, p_fmt_src->i_visible_height );
#endif
const double src_ratio = (double)p_fmt_src->i_visible_width / p_fmt_src->i_visible_height;
const double dst_ratio = (double)p_fmt_dst->i_visible_width / p_fmt_dst->i_visible_height;
#if LIBASS_VERSION >= 0x01020000
ass_set_pixel_aspect( p_sys->p_renderer, dst_ratio / src_ratio );
#else
ass_set_aspect_ratio( p_sys->p_renderer, dst_ratio / src_ratio, 1 );
#endif
}
if( p_sys->p_obj )
{
int scale = var_InheritInteger( p_sys->p_obj, "sub-text-scale" );
ass_set_font_scale( p_sys->p_renderer, scale / 100.0 );
}
/* */
const vlc_tick_t i_stream_date = p_spusys->i_pts + (i_ts - p_subpic->i_start);
int i_changed;
ASS_Image *p_img = ass_render_frame( p_sys->p_renderer, p_sys->p_track,
MS_FROM_VLC_TICK( i_stream_date ), &i_changed );
if( !i_changed && !b_fmt_src && !b_fmt_dst &&
(p_img != NULL) == (!vlc_spu_regions_is_empty(&p_subpic->regions)) )
{
vlc_mutex_unlock( &p_sys->lock );
return;
}
vlc_spu_regions_Clear( &p_subpic->regions );
/* */
p_subpic->i_original_picture_height = p_fmt_dst->i_visible_height;
p_subpic->i_original_picture_width = p_fmt_dst->i_visible_width;
/* XXX to improve efficiency we merge regions that are close minimizing
* the lost surface.
* libass tends to create a lot of small regions and thus spu engine
* reinstanciate a lot the scaler, and as we do not support subpel blending
* it looks ugly (text unaligned).
*/
const int i_max_region = 4;
rectangle_t region[i_max_region];
const int i_region = BuildRegions( region, i_max_region, p_img, p_fmt_dst->i_width, p_fmt_dst->i_height );
if( i_region <= 0 )
{
vlc_mutex_unlock( &p_sys->lock );
return;
}
/* Allocate the regions and draw them */
video_format_t fmt_region;
fmt_region = *p_fmt_dst;
fmt_region.i_chroma = VLC_CODEC_RGBA;
fmt_region.i_x_offset = 0;
fmt_region.i_y_offset = 0;
for( int i = 0; i < i_region; i++ )
{
subpicture_region_t *r;
/* */
fmt_region.i_width =
fmt_region.i_visible_width = region[i].x1 - region[i].x0;
fmt_region.i_height =
fmt_region.i_visible_height = region[i].y1 - region[i].y0;
r = subpicture_region_New( &fmt_region );
if( !r )
break;
r->b_absolute = true;
r->i_x = region[i].x0;
r->i_y = region[i].y0;
r->i_align = SUBPICTURE_ALIGN_TOP | SUBPICTURE_ALIGN_LEFT;
/* */
RegionDraw( r, p_img );
/* */
vlc_spu_regions_push(&p_subpic->regions, r);
}
vlc_mutex_unlock( &p_sys->lock );
}
static void SubpictureDestroy( subpicture_t *p_subpic )
{
libass_spu_updater_sys_t *p_spusys = p_subpic->updater.sys;
DecSysRelease( p_spusys->p_dec_sys );
free( p_spusys );
}
static rectangle_t r_create( int x0, int y0, int x1, int y1 )
{
rectangle_t r = { x0, y0, x1, y1 };
return r;
}
static rectangle_t r_img( const ASS_Image *p_img )
{
return r_create( p_img->dst_x, p_img->dst_y, p_img->dst_x+p_img->w, p_img->dst_y+p_img->h );
}
static void r_add( rectangle_t *r, const rectangle_t *n )
{
r->x0 = __MIN( r->x0, n->x0 );
r->y0 = __MIN( r->y0, n->y0 );
r->x1 = __MAX( r->x1, n->x1 );
r->y1 = __MAX( r->y1, n->y1 );
}
static int r_surface( const rectangle_t *r )
{
return (r->x1-r->x0) * (r->y1-r->y0);
}
static bool r_overlap( const rectangle_t *a, const rectangle_t *b, int i_dx, int i_dy )
{
return __MAX(a->x0-i_dx, b->x0) < __MIN( a->x1+i_dx, b->x1 ) &&
__MAX(a->y0-i_dy, b->y0) < __MIN( a->y1+i_dy, b->y1 );
}
static int BuildRegions( rectangle_t *p_region, int i_max_region, ASS_Image *p_img_list, int i_width, int i_height )
{
ASS_Image *p_tmp;
int i_count;
#ifdef DEBUG_REGION
int64_t i_ck_start = vlc_tick_now();
#endif
for( p_tmp = p_img_list, i_count = 0; p_tmp != NULL; p_tmp = p_tmp->next )
if( p_tmp->w > 0 && p_tmp->h > 0 )
i_count++;
if( i_count <= 0 )
return 0;
ASS_Image **pp_img = calloc( i_count, sizeof(*pp_img) );
if( !pp_img )
return 0;
for( p_tmp = p_img_list, i_count = 0; p_tmp != NULL; p_tmp = p_tmp->next )
if( p_tmp->w > 0 && p_tmp->h > 0 )
pp_img[i_count++] = p_tmp;
/* */
const int i_w_inc = __MAX( ( i_width + 49 ) / 50, 32 );
const int i_h_inc = __MAX( ( i_height + 99 ) / 100, 32 );
int i_maxh = i_w_inc;
int i_maxw = i_h_inc;
int i_region;
rectangle_t region[i_max_region+1];
i_region = 0;
for( int i_used = 0; i_used < i_count; )
{
int n;
for( n = 0; n < i_count; n++ )
{
if( pp_img[n] )
break;
}
assert( i_region < i_max_region + 1 );
region[i_region++] = r_img( pp_img[n] );
pp_img[n] = NULL; i_used++;
bool b_ok;
do {
b_ok = false;
for( n = 0; n < i_count; n++ )
{
ASS_Image *p_img = pp_img[n];
if( !p_img )
continue;
rectangle_t r = r_img( p_img );
int k;
int i_best = -1;
int i_best_s = INT_MAX;
for( k = 0; k < i_region; k++ )
{
if( !r_overlap( &region[k], &r, i_maxw, i_maxh ) )
continue;
int s = r_surface( &r );
if( s < i_best_s )
{
i_best_s = s;
i_best = k;
}
}
if( i_best >= 0 )
{
r_add( &region[i_best], &r );
pp_img[n] = NULL; i_used++;
b_ok = true;
}
}
} while( b_ok );
if( i_region > i_max_region )
{
int i_best_i = -1;
int i_best_j = -1;
int i_best_ds = INT_MAX;
/* merge best */
for( int i = 0; i < i_region; i++ )
{
for( int j = i+1; j < i_region; j++ )
{
rectangle_t rect = region[i];
r_add( &rect, &region[j] );
int ds = r_surface( &rect ) - r_surface( &region[i] ) - r_surface( &region[j] );
if( ds < i_best_ds )
{
i_best_i = i;
i_best_j = j;
i_best_ds = ds;
}
}
}
#ifdef DEBUG_REGION
msg_Err( p_spu, "Merging %d and %d", i_best_i, i_best_j );
#endif
if( i_best_j >= 0 && i_best_i >= 0 )
{
r_add( &region[i_best_i], &region[i_best_j] );
if( i_best_j+1 < i_region )
memmove( &region[i_best_j], &region[i_best_j+1], sizeof(*region) * ( i_region - (i_best_j+1) ) );
i_region--;
}
}
}
/* */
for( int n = 0; n < i_region; n++ )
p_region[n] = region[n];
#ifdef DEBUG_REGION
int64_t i_ck_time = vlc_tick_now() - i_ck_start;
msg_Err( p_spu, "ASS: %d objects merged into %d region in %d micros", i_count, i_region, (int)(i_ck_time) );
#endif
free( pp_img );
return i_region;
}
static void RegionDraw( subpicture_region_t *p_region, ASS_Image *p_img )
{
const plane_t *p = &p_region->p_picture->p[0];
const int i_x = p_region->i_x;
const int i_y = p_region->i_y;
const int i_width = p_region->p_picture->format.i_width;
const int i_height = p_region->p_picture->format.i_height;
memset( p->p_pixels, 0x00, p->i_pitch * p->i_visible_lines );
for( ; p_img != NULL; p_img = p_img->next )
{
int i_dst_x = p_img->dst_x - i_x;
int i_dst_y = p_img->dst_y - i_y;
if( i_dst_x < 0 || i_dst_x + p_img->w > i_width ||
i_dst_y < 0 || i_dst_y + p_img->h > i_height )
continue;
/* /!\ Bogus alpha channel is inverted */
const unsigned a = (~p_img->color )&0xff;
if( a == 0 )
continue;
const unsigned r = (p_img->color >> 24)&0xff;
const unsigned g = (p_img->color >> 16)&0xff;
const unsigned b = (p_img->color >> 8)&0xff;
const uint8_t *srcrow = p_img->bitmap;
int i_pitch_src = p_img->stride;
int i_pitch_dst = p->i_pitch;
uint8_t *dstrow = &p->p_pixels[i_dst_y * i_pitch_dst + 4 * i_dst_x];
for( int y = 0; y < p_img->h; y++ )
{
const uint8_t *src = srcrow;
uint8_t *dst = dstrow;
for( int x = 0; x < p_img->w; x++ )
{
unsigned opacity = *src++; /* 1 Bpp channel */
if( opacity != 0 ) /* we need to blend only non transparent content */
{
unsigned i_an = a * opacity / 255U;
unsigned i_ao = dst[3];
if( i_ao == 0 )
{
dst[0] = r;
dst[1] = g;
dst[2] = b;
dst[3] = i_an;
}
else
{
unsigned i_ani = 255 - i_an;
dst[3] = 255 - (255 - i_ao) * i_ani / 255;
if( dst[3] != 0 )
{
unsigned i_aoni = i_ao * i_ani / 255;
dst[0] = ( dst[0] * i_aoni + r * i_an ) / dst[3];
dst[1] = ( dst[1] * i_aoni + g * i_an ) / dst[3];
dst[2] = ( dst[2] * i_aoni + b * i_an ) / dst[3];
}
}
}
dst += 4;
}
srcrow += i_pitch_src;
dstrow += i_pitch_dst;
}
}
#ifdef DEBUG_REGION
/* XXX Draw a box for debug */
#define P(x,y) ((uint32_t*)&p->p_pixels[(y)*p->i_pitch + 4*(x)])
for( int y = 0; y < p->i_lines; y++ )
*P(0,y) = *P(p->i_visible_pitch/4-1,y) = 0xff000000;
for( int x = 0; x < p->i_visible_pitch; x++ )
*P(x/4,0) = *P(x/4,p->i_visible_lines-1) = 0xff000000;
#undef P
#endif
}
/* Patch [Script Info] aiming old and custom rendering engine
* See #27771 */
static void OldEngineClunkyRollInfoPatch( decoder_t *p_dec, ASS_Track *p_track )
{
if( !p_dec->fmt_in->i_extra )
return;
stream_t *p_memstream = vlc_stream_MemoryNew( p_dec, p_dec->fmt_in->p_extra,
p_dec->fmt_in->i_extra, true );
char *s = vlc_stream_ReadLine( p_memstream );
unsigned playres[2] = {0, 0};
bool b_hotfix = false;
if( s && !strncmp( s, "[Script Info]", 13 ) )
{
free( s );
for( ;; )
{
s = vlc_stream_ReadLine( p_memstream );
if( !s || *s == '[' /* Next section */ )
{
break;
}
else if( !strncmp( s, "PlayResX: ", 10 ) ||
!strncmp( s, "PlayResY: ", 10 ) )
{
playres[s[7] - 'X'] = atoi( &s[9] );
}
else if( !strncmp( s, "Original Script: ", 17 ) )
{
b_hotfix = !!strstr( s, "[http://www.crunchyroll.com/user/" );
if( !b_hotfix )
break;
}
else if( !strncmp( s, "LayoutRes", 9 ) ||
!strncmp( s, "ScaledBorderAndShadow:", 22 ) )
{
/* They can still have fixed their mess in the future. Tell me, Marty. */
b_hotfix = false;
break;
}
free( s );
}
}
free( s );
vlc_stream_Delete( p_memstream );
if( b_hotfix && playres[0] && playres[1] )
{
msg_Dbg( p_dec,"patching script info for custom rendering engine "
"(built against libass 0x%X)", LIBASS_VERSION );
/* Only modify struct _before_ any ass_process_chunk calls
(see ass_types.h documentation for when modifications are allowed) */
p_track->ScaledBorderAndShadow = 1;
p_track->YCbCrMatrix = YCBCR_NONE;
#if LIBASS_VERSION >= 0x01600020
p_track->LayoutResX = playres[0];
p_track->LayoutResY = playres[1];
#endif
}
}
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