@ -48,6 +48,9 @@
# include <stdarg.h>
# include <limits.h>
# include <float.h>
# if HAVE_ICONV
# include <iconv.h>
# endif
volatile int ff_avcodec_locked ;
static int volatile entangled_thread_counter = 0 ;
@ -1089,6 +1092,32 @@ int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *code
ret = AVERROR ( EINVAL ) ;
goto free_and_end ;
}
if ( avctx - > sub_charenc ) {
if ( avctx - > codec_type ! = AVMEDIA_TYPE_SUBTITLE ) {
av_log ( avctx , AV_LOG_ERROR , " Character encoding is only "
" supported with subtitles codecs \n " ) ;
ret = AVERROR ( EINVAL ) ;
goto free_and_end ;
} else if ( avctx - > codec_descriptor - > props & AV_CODEC_PROP_BITMAP_SUB ) {
av_log ( avctx , AV_LOG_WARNING , " Codec '%s' is bitmap-based, "
" subtitles character encoding will be ignored \n " ,
avctx - > codec_descriptor - > name ) ;
avctx - > sub_charenc_mode = FF_SUB_CHARENC_MODE_DO_NOTHING ;
} else {
/* input character encoding is set for a text based subtitle
* codec at this point */
if ( avctx - > sub_charenc_mode = = FF_SUB_CHARENC_MODE_AUTOMATIC )
avctx - > sub_charenc_mode = FF_SUB_CHARENC_MODE_PRE_DECODER ;
if ( ! HAVE_ICONV & & avctx - > sub_charenc_mode = = FF_SUB_CHARENC_MODE_PRE_DECODER ) {
av_log ( avctx , AV_LOG_ERROR , " Character encoding subtitles "
" conversion needs a libavcodec built with iconv support "
" for this codec \n " ) ;
ret = AVERROR ( ENOSYS ) ;
goto free_and_end ;
}
}
}
}
end :
ff_unlock_avcodec ( ) ;
@ -1847,6 +1876,68 @@ int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
return ret ;
}
# define UTF8_MAX_BYTES 4 /* 5 and 6 bytes sequences should not be used */
static int recode_subtitle ( AVCodecContext * avctx ,
AVPacket * outpkt , const AVPacket * inpkt )
{
# if HAVE_ICONV
iconv_t cd = ( iconv_t ) - 1 ;
int ret = 0 ;
char * inb , * outb ;
size_t inl , outl ;
AVPacket tmp ;
# endif
if ( avctx - > sub_charenc_mode ! = FF_SUB_CHARENC_MODE_PRE_DECODER )
return 0 ;
# if HAVE_ICONV
cd = iconv_open ( " UTF-8 " , avctx - > sub_charenc ) ;
if ( cd = = ( iconv_t ) - 1 ) {
av_log ( avctx , AV_LOG_ERROR , " Unable to open iconv context "
" with input character encoding \" %s \" \n " , avctx - > sub_charenc ) ;
ret = AVERROR ( errno ) ;
goto end ;
}
inb = inpkt - > data ;
inl = inpkt - > size ;
if ( inl > = INT_MAX / UTF8_MAX_BYTES - FF_INPUT_BUFFER_PADDING_SIZE ) {
av_log ( avctx , AV_LOG_ERROR , " Subtitles packet is too big for recoding \n " ) ;
ret = AVERROR ( ENOMEM ) ;
goto end ;
}
ret = av_new_packet ( & tmp , inl * UTF8_MAX_BYTES ) ;
if ( ret < 0 )
goto end ;
outpkt - > data = tmp . data ;
outpkt - > size = tmp . size ;
outb = outpkt - > data ;
outl = outpkt - > size ;
if ( iconv ( cd , & inb , & inl , & outb , & outl ) = = ( size_t ) - 1 | |
iconv ( cd , NULL , NULL , & outb , & outl ) = = ( size_t ) - 1 | |
outl > = outpkt - > size | | inl ! = 0 ) {
av_log ( avctx , AV_LOG_ERROR , " Unable to recode subtitle event \" %s \" "
" from %s to UTF-8 \n " , inpkt - > data , avctx - > sub_charenc ) ;
av_free_packet ( & tmp ) ;
ret = AVERROR ( errno ) ;
goto end ;
}
outpkt - > size - = outl ;
outpkt - > data [ outpkt - > size - 1 ] = ' \0 ' ;
end :
if ( cd ! = ( iconv_t ) - 1 )
iconv_close ( cd ) ;
return ret ;
# else
av_assert0 ( ! " requesting subtitles recoding without iconv " ) ;
# endif
}
int avcodec_decode_subtitle2 ( AVCodecContext * avctx , AVSubtitle * sub ,
int * got_sub_ptr ,
AVPacket * avpkt )
@ -1862,19 +1953,28 @@ int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
avcodec_get_subtitle_defaults ( sub ) ;
if ( avpkt - > size ) {
AVPacket pkt_recoded ;
AVPacket tmp = * avpkt ;
int did_split = av_packet_split_side_data ( & tmp ) ;
//apply_param_change(avctx, &tmp);
avctx - > pkt = & tmp ;
pkt_recoded = tmp ;
ret = recode_subtitle ( avctx , & pkt_recoded , & tmp ) ;
if ( ret < 0 ) {
* got_sub_ptr = 0 ;
} else {
avctx - > pkt = & pkt_recoded ;
if ( avctx - > pkt_timebase . den & & avpkt - > pts ! = AV_NOPTS_VALUE )
sub - > pts = av_rescale_q ( avpkt - > pts ,
avctx - > pkt_timebase , AV_TIME_BASE_Q ) ;
ret = avctx - > codec - > decode ( avctx , sub , got_sub_ptr , & tmp ) ;
ret = avctx - > codec - > decode ( avctx , sub , got_sub_ptr , & pkt_recoded ) ;
if ( tmp . data ! = pkt_recoded . data )
av_free ( pkt_recoded . data ) ;
sub - > format = ! ( avctx - > codec_descriptor - > props & AV_CODEC_PROP_BITMAP_SUB ) ;
avctx - > pkt = NULL ;
}
if ( did_split ) {
ff_packet_free_side_data ( & tmp ) ;
if ( ret = = tmp . size )
Clément Bœsch
12 years ago