hb_job_t *job;
};
-#define SSA_2_HB_TIME(hr,min,sec,centi) \
- ( 90LL * ( hr * 1000LL * 60 * 60 +\
- min * 1000LL * 60 +\
- sec * 1000LL +\
- centi * 10LL ) )
-
#define SSA_VERBOSE_PACKETS 0
static int ssa_update_style(char *ssa, hb_subtitle_style_t *style)
style->bg_alpha = 0xFF;
}
-static hb_buffer_t *
-ssa_decode_line_to_mkv_ssa( hb_work_object_t * w, hb_buffer_t * in,
- uint8_t *in_data, int in_size );
-
-/*
- * Decodes a single SSA packet to one or more TEXTSUB or PICTURESUB subtitle packets.
- *
- * SSA packet format:
- * ( Dialogue: Marked,Start,End,Style,Name,MarginL,MarginR,MarginV,Effect,Text CR LF ) +
- * 1 2 3 4 5 6 7 8 9 10
- */
-static hb_buffer_t *ssa_decode_packet( hb_work_object_t * w, hb_buffer_t *in )
-{
- // Store NULL after the end of the buffer to make using string processing safe
- hb_buffer_realloc(in, ++in->size);
- in->data[in->size - 1] = '\0';
-
- hb_buffer_list_t list;
- hb_buffer_t *buf;
-
- hb_buffer_list_clear(&list);
- const char *EOL = "\r\n";
- char *curLine, *curLine_parserData;
- for ( curLine = strtok_r( (char *) in->data, EOL, &curLine_parserData );
- curLine;
- curLine = strtok_r( NULL, EOL, &curLine_parserData ) )
- {
- // Skip empty lines and spaces between adjacent CR and LF
- if (curLine[0] == '\0')
- continue;
-
- // Decode an individual SSA line
- buf = ssa_decode_line_to_mkv_ssa(w, in,
- (uint8_t *)curLine, strlen(curLine));
- hb_buffer_list_append(&list, buf);
- }
-
- return hb_buffer_list_clear(&list);
-}
-
-/*
- * Parses the start and stop time from the specified SSA packet.
- *
- * Returns true if parsing failed; false otherwise.
- */
-static int parse_timing_from_ssa_packet( char *in_data, int64_t *in_start, int64_t *in_stop )
-{
- /*
- * Parse Start and End fields for timing information
- */
- int start_hr, start_min, start_sec, start_centi;
- int end_hr, end_min, end_sec, end_centi;
- // SSA subtitles have an empty layer field (bare ','). The scanf
- // format specifier "%*128[^,]" will not match on a bare ','. There
- // must be at least one non ',' character in the match. So the format
- // specifier is placed directly next to the ':' so that the next
- // expected ' ' after the ':' will be the character it matches on
- // when there is no layer field.
- int numPartsRead = sscanf( (char *) in_data, "Dialogue:%*128[^,],"
- "%d:%d:%d.%d," // Start
- "%d:%d:%d.%d,", // End
- &start_hr, &start_min, &start_sec, &start_centi,
- &end_hr, &end_min, &end_sec, &end_centi );
- if ( numPartsRead != 8 )
- return 1;
-
- *in_start = SSA_2_HB_TIME(start_hr, start_min, start_sec, start_centi);
- *in_stop = SSA_2_HB_TIME( end_hr, end_min, end_sec, end_centi);
-
- return 0;
-}
-
-static uint8_t *find_field( uint8_t *pos, uint8_t *end, int fieldNum )
-{
- int curFieldID = 1;
- while (pos < end)
- {
- if ( *pos++ == ',' )
- {
- curFieldID++;
- if ( curFieldID == fieldNum )
- return pos;
- }
- }
- return NULL;
-}
-
-/*
- * SSA line format:
- * Dialogue: Marked,Start,End,Style,Name,MarginL,MarginR,MarginV,Effect,Text '\0'
- * 1 2 3 4 5 6 7 8 9 10
- *
- * MKV-SSA packet format:
- * ReadOrder,Marked, Style,Name,MarginL,MarginR,MarginV,Effect,Text '\0'
- * 1 2 3 4 5 6 7 8 9
- */
-static hb_buffer_t *
-ssa_decode_line_to_mkv_ssa( hb_work_object_t * w, hb_buffer_t * in,
- uint8_t *in_data, int in_size )
-{
- hb_work_private_t * pv = w->private_data;
- hb_buffer_t * out;
-
- // Parse values for in->s.start and in->s.stop
- int64_t in_start, in_stop;
- if ( parse_timing_from_ssa_packet( (char *) in_data, &in_start, &in_stop ) )
- goto fail;
-
- // Convert the SSA packet to MKV-SSA format, which is what libass expects
- char *mkvIn;
- int numPartsRead;
- char *styleToTextFields;
- char *layerField = malloc( in_size );
-
- // SSA subtitles have an empty layer field (bare ','). The scanf
- // format specifier "%*128[^,]" will not match on a bare ','. There
- // must be at least one non ',' character in the match. So the format
- // specifier is placed directly next to the ':' so that the next
- // expected ' ' after the ':' will be the character it matches on
- // when there is no layer field.
- numPartsRead = sscanf( (char *)in_data, "Dialogue:%128[^,],", layerField );
- if ( numPartsRead != 1 )
- {
- free(layerField);
- goto fail;
- }
-
- styleToTextFields = (char *)find_field( in_data, in_data + in_size, 4 );
- if ( styleToTextFields == NULL ) {
- free( layerField );
- goto fail;
- }
-
- // The sscanf conversion above will result in an extra space
- // before the layerField. Strip the space.
- char *stripLayerField = layerField;
- for(; *stripLayerField == ' '; stripLayerField++);
-
- out = hb_buffer_init( in_size + 1 );
- mkvIn = (char*)out->data;
-
- mkvIn[0] = '\0';
- sprintf(mkvIn, "%d", pv->readOrder++); // ReadOrder: make this up
- strcat( mkvIn, "," );
- strcat( mkvIn, stripLayerField );
- strcat( mkvIn, "," );
- strcat( mkvIn, (char *)styleToTextFields );
-
- out->size = strlen(mkvIn) + 1;
- out->s.frametype = HB_FRAME_SUBTITLE;
- out->s.start = in->s.start;
- out->s.duration = in_stop - in_start;
- out->s.stop = in->s.start + out->s.duration;
- out->s.scr_sequence = in->s.scr_sequence;
-
- if( out->size == 0 )
- {
- hb_buffer_close(&out);
- }
-
- free( layerField );
-
- return out;
-
-fail:
- hb_log( "decssasub: malformed SSA subtitle packet: %.*s\n", in_size, in_data );
- return NULL;
-}
-
static int decssaInit( hb_work_object_t * w, hb_job_t * job )
{
hb_work_private_t * pv;
printf("\nPACKET(%"PRId64",%"PRId64"): %.*s\n", in->s.start/90, in->s.stop/90, in->size, in->data);
#endif
+ *buf_in = NULL;
+ *buf_out = in;
if (in->s.flags & HB_BUF_FLAG_EOF)
{
- *buf_out = in;
- *buf_in = NULL;
return HB_WORK_DONE;
}
- *buf_out = ssa_decode_packet(w, in);
+ // Not much to do here. ffmpeg already supplies SSA subtitles in the
+ // requried matroska packet format.
+ //
+ // We require string termination of the buffer
+ hb_buffer_realloc(in, ++in->size);
+ in->data[in->size - 1] = '\0';
return HB_WORK_OK;
}
buf->s.renderOffset = buf->s.start;
}
- /*
- * Fill out buf->s.stop for subtitle packets
- *
- * libavcodec's MKV demuxer stores the duration of UTF-8 subtitles (AV_CODEC_ID_TEXT)
- * in the 'convergence_duration' field for some reason.
- *
- * Other subtitles' durations are stored in the 'duration' field.
- *
- * VOB subtitles (AV_CODEC_ID_DVD_SUBTITLE) do not have their duration stored in
- * either field. This is not a problem because the VOB decoder can extract this
- * information from the packet payload itself.
- *
- * SSA subtitles (AV_CODEC_ID_ASS) do not have their duration stored in
- * either field. This is not a problem because the SSA decoder can extract this
- * information from the packet payload itself.
- */
- enum AVCodecID ffmpeg_pkt_codec;
- enum AVMediaType codec_type;
- ffmpeg_pkt_codec = stream->ffmpeg_ic->streams[stream->ffmpeg_pkt.stream_index]->codecpar->codec_id;
- codec_type = stream->ffmpeg_ic->streams[stream->ffmpeg_pkt.stream_index]->codecpar->codec_type;
- switch ( codec_type )
+ switch (s->codecpar->codec_type)
{
case AVMEDIA_TYPE_VIDEO:
buf->s.type = VIDEO_BUF;
break;
case AVMEDIA_TYPE_SUBTITLE:
+ {
+ // Fill out stop and duration for subtitle packets
+ int64_t pkt_duration = stream->ffmpeg_pkt.duration;
+ if (pkt_duration != AV_NOPTS_VALUE)
+ {
+ buf->s.duration = av_to_hb_pts(pkt_duration, tsconv, 0);
+ buf->s.stop = buf->s.start + buf->s.duration;
+ }
buf->s.type = SUBTITLE_BUF;
- break;
+ } break;
default:
buf->s.type = OTHER_BUF;
break;
}
- if ( ffmpeg_pkt_codec == AV_CODEC_ID_TEXT ||
- ffmpeg_pkt_codec == AV_CODEC_ID_SUBRIP ||
- ffmpeg_pkt_codec == AV_CODEC_ID_MOV_TEXT ) {
- int64_t ffmpeg_pkt_duration = stream->ffmpeg_pkt.duration;
- int64_t buf_duration = av_to_hb_pts( ffmpeg_pkt_duration, tsconv, 0 );
- buf->s.stop = buf->s.start + buf_duration;
- }
/*
* Check to see whether this buffer is on a chapter
projects / handbrake / commitdiff