/*****************************************************************************
* ParseText: parse an text subtitle packet and send it to the video output
*****************************************************************************/
static subpicture_t *ParseText( decoder_t *p_dec, block_t *p_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
subpicture_t *p_spu = NULL;
char *psz_subtitle = NULL;
video_format_t fmt;
/* We cannot display a subpicture with no date */
if( p_block->i_pts == 0 )
{
msg_Warn( p_dec, "subtitle without a date" );
return NULL;
}
/* Check validity of packet data */
/* An "empty" line containing only \0 can be used to force
and ephemer picture from the screen */
if( p_block->i_buffer < 1 )
{
msg_Warn( p_dec, "no subtitle data" );
return NULL;
}
/* Should be resiliant against bad subtitles */
psz_subtitle = strndup( (const char *)p_block->p_buffer,
p_block->i_buffer );
if( psz_subtitle == NULL )
return NULL;
if( p_sys->iconv_handle == (vlc_iconv_t)-1 )
EnsureUTF8( psz_subtitle );
else
{
if( p_sys->b_autodetect_utf8 )
{
if( IsUTF8( psz_subtitle ) == NULL )
{
msg_Dbg( p_dec, "invalid UTF-8 sequence: "
"disabling UTF-8 subtitles autodetection" );
p_sys->b_autodetect_utf8 = VLC_FALSE;
}
}
if( !p_sys->b_autodetect_utf8 )
{
size_t inbytes_left = strlen( psz_subtitle );
size_t outbytes_left = 6 * inbytes_left;
char *psz_new_subtitle = malloc( outbytes_left + 1 );
char *psz_convert_buffer_out = psz_new_subtitle;
const char *psz_convert_buffer_in = psz_subtitle;
size_t ret = vlc_iconv( p_sys->iconv_handle,
&psz_convert_buffer_in, &inbytes_left,
&psz_convert_buffer_out, &outbytes_left );
*psz_convert_buffer_out++ = '\0';
free( psz_subtitle );
if( ( ret == (size_t)(-1) ) || inbytes_left )
{
free( psz_new_subtitle );
msg_Err( p_dec, _("failed to convert subtitle encoding.\n"
"Try manually setting a character-encoding "
"before you open the file.") );
return NULL;
}
psz_subtitle = realloc( psz_new_subtitle,
psz_convert_buffer_out - psz_new_subtitle );
}
}
/* Create the subpicture unit */
p_spu = p_dec->pf_spu_buffer_new( p_dec );
if( !p_spu )
{
msg_Warn( p_dec, "can't get spu buffer" );
if( psz_subtitle ) free( psz_subtitle );
return NULL;
}
p_spu->b_pausable = VLC_TRUE;
/* Create a new subpicture region */
memset( &fmt, 0, sizeof(video_format_t) );
fmt.i_chroma = VLC_FOURCC('T','E','X','T');
fmt.i_aspect = 0;
fmt.i_width = fmt.i_height = 0;
fmt.i_x_offset = fmt.i_y_offset = 0;
p_spu->p_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
if( !p_spu->p_region )
{
msg_Err( p_dec, "cannot allocate SPU region" );
if( psz_subtitle ) free( psz_subtitle );
p_dec->pf_spu_buffer_del( p_dec, p_spu );
return NULL;
}
/* Decode and format the subpicture unit */
if( p_dec->fmt_in.i_codec != VLC_FOURCC('s','s','a',' ') )
{
/* Normal text subs, easy markup */
p_spu->i_flags = SUBPICTURE_ALIGN_BOTTOM | p_sys->i_align;
p_spu->i_x = p_sys->i_align ? 20 : 0;
p_spu->i_y = 10;
/* Remove formatting from string */
StripTags( psz_subtitle );
p_spu->p_region->psz_text = psz_subtitle;
p_spu->i_start = p_block->i_pts;
p_spu->i_stop = p_block->i_pts + p_block->i_length;
p_spu->b_ephemer = (p_block->i_length == 0);
p_spu->b_absolute = VLC_FALSE;
}
else
{
/* Decode SSA strings */
ParseSSAString( p_dec, psz_subtitle, p_spu );
p_spu->i_start = p_block->i_pts;
p_spu->i_stop = p_block->i_pts + p_block->i_length;
p_spu->b_ephemer = (p_block->i_length == 0);
p_spu->b_absolute = VLC_FALSE;
p_spu->i_original_picture_width = p_sys->i_original_width;
p_spu->i_original_picture_height = p_sys->i_original_height;
if( psz_subtitle ) free( psz_subtitle );
}
return p_spu;
}
/*****************************************************************************
* ParseText: parse an text subtitle packet and send it to the video output
*****************************************************************************/
static subpicture_t *ParseText( decoder_t *p_dec, block_t *p_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
subpicture_t *p_spu = NULL;
char *psz_subtitle = NULL;
video_format_t fmt;
/* We cannot display a subpicture with no date */
if( p_block->i_pts <= VLC_TS_INVALID )
{
msg_Warn( p_dec, "subtitle without a date" );
return NULL;
}
/* Check validity of packet data */
/* An "empty" line containing only \0 can be used to force
and ephemer picture from the screen */
if( p_block->i_buffer < 1 )
{
msg_Warn( p_dec, "no subtitle data" );
return NULL;
}
/* Should be resiliant against bad subtitles */
psz_subtitle = malloc( p_block->i_buffer + 1 );
if( psz_subtitle == NULL )
return NULL;
memcpy( psz_subtitle, p_block->p_buffer, p_block->i_buffer );
psz_subtitle[p_block->i_buffer] = '\0';
if( p_sys->iconv_handle == (vlc_iconv_t)-1 )
{
if (EnsureUTF8( psz_subtitle ) == NULL)
{
msg_Err( p_dec, "failed to convert subtitle encoding.\n"
"Try manually setting a character-encoding "
"before you open the file." );
}
}
else
{
if( p_sys->b_autodetect_utf8 )
{
if( IsUTF8( psz_subtitle ) == NULL )
{
msg_Dbg( p_dec, "invalid UTF-8 sequence: "
"disabling UTF-8 subtitles autodetection" );
p_sys->b_autodetect_utf8 = false;
}
}
if( !p_sys->b_autodetect_utf8 )
{
size_t inbytes_left = strlen( psz_subtitle );
size_t outbytes_left = 6 * inbytes_left;
char *psz_new_subtitle = xmalloc( outbytes_left + 1 );
char *psz_convert_buffer_out = psz_new_subtitle;
const char *psz_convert_buffer_in = psz_subtitle;
size_t ret = vlc_iconv( p_sys->iconv_handle,
&psz_convert_buffer_in, &inbytes_left,
&psz_convert_buffer_out, &outbytes_left );
*psz_convert_buffer_out++ = '\0';
free( psz_subtitle );
if( ( ret == (size_t)(-1) ) || inbytes_left )
{
free( psz_new_subtitle );
msg_Err( p_dec, "failed to convert subtitle encoding.\n"
"Try manually setting a character-encoding "
"before you open the file." );
return NULL;
}
psz_subtitle = realloc( psz_new_subtitle,
psz_convert_buffer_out - psz_new_subtitle );
if( !psz_subtitle )
psz_subtitle = psz_new_subtitle;
}
}
/* Create the subpicture unit */
p_spu = decoder_NewSubpicture( p_dec, NULL );
if( !p_spu )
{
msg_Warn( p_dec, "can't get spu buffer" );
free( psz_subtitle );
return NULL;
}
/* Create a new subpicture region */
memset( &fmt, 0, sizeof(video_format_t) );
fmt.i_chroma = VLC_CODEC_TEXT;
fmt.i_width = fmt.i_height = 0;
fmt.i_x_offset = fmt.i_y_offset = 0;
p_spu->p_region = subpicture_region_New( &fmt );
if( !p_spu->p_region )
{
msg_Err( p_dec, "cannot allocate SPU region" );
free( psz_subtitle );
decoder_DeleteSubpicture( p_dec, p_spu );
return NULL;
}
/* Decode and format the subpicture unit */
if( p_dec->fmt_in.i_codec != VLC_CODEC_SSA )
{
/* Normal text subs, easy markup */
p_spu->p_region->i_align = SUBPICTURE_ALIGN_BOTTOM | p_sys->i_align;
p_spu->p_region->i_x = p_sys->i_align ? 20 : 0;
p_spu->p_region->i_y = 10;
/* Remove formatting from string */
p_spu->p_region->psz_text = StripTags( psz_subtitle );
if( var_InheritBool( p_dec, "subsdec-formatted" ) )
{
p_spu->p_region->psz_html = CreateHtmlSubtitle( &p_spu->p_region->i_align, psz_subtitle );
}
p_spu->i_start = p_block->i_pts;
p_spu->i_stop = p_block->i_pts + p_block->i_length;
p_spu->b_ephemer = (p_block->i_length == 0);
p_spu->b_absolute = false;
}
else
{
/* Decode SSA/USF strings */
ParseSSAString( p_dec, psz_subtitle, p_spu );
p_spu->i_start = p_block->i_pts;
p_spu->i_stop = p_block->i_pts + p_block->i_length;
p_spu->b_ephemer = (p_block->i_length == 0);
p_spu->b_absolute = false;
p_spu->i_original_picture_width = p_sys->i_original_width;
p_spu->i_original_picture_height = p_sys->i_original_height;
}
free( psz_subtitle );
return p_spu;
}
