mirror of
https://github.com/CCExtractor/ccextractor.git
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Implementation of DVB Subtitle
This commit is contained in:
parent
6033e5bea8
commit
a6c36197ba
3
.gitignore
vendored
3
.gitignore
vendored
@ -1,3 +1,6 @@
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#Ignore CVS
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.CVS
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CVS
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*.o
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linux/ccextractor
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linux/depend
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@ -19,7 +19,7 @@ src_OBJS = \
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encoding.o es_functions.o es_userdata.o file_functions.o \
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general_loop.o mp4.o myth.o output.o params_dump.o params.o \
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sequencing.o stream_functions.o telxcc.o timing.o ts_functions.o \
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utility.o wtv_functions.o xds.o
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utility.o wtv_functions.o xds.o dvb_subtitle_decoder.o ts_tables.o
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gpacmp4_OBJS = \
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avc_ext.o avilib.o av_parsers.o base_encoding.o bitstream.o \
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@ -42,7 +42,8 @@ src_SRC = \
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../src/output.cpp ../src/params.cpp ../src/params_dump.cpp \
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../src/sequencing.cpp ../src/stream_functions.cpp ../src/telxcc.cpp \
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../src/timing.cpp ../src/ts_functions.cpp ../src/utility.cpp \
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../src/wtv_functions.cpp ../src/xds.cpp
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../src/wtv_functions.cpp ../src/xds.cpp ../src/dvb_subtitle_decoder.c \
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../src/ts_tables.cpp
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gpacmp4_SRC = \
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../src/gpacmp4/avc_ext.c ../src/gpacmp4/avilib.c \
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@ -104,6 +104,11 @@ void init_options (struct ccx_s_options *options)
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options->direct_rollup=0; // Write roll-up captions directly instead of line by line?
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options->nofontcolor=0; // 1 = don't put <font color> tags
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options->notypesetting=0; // 1 = Don't put <i>, <u>, etc typesetting tags
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/* Select subtitle codec */
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options->codec = CCX_CODEC_ANY;
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options->nocodec = CCX_CODEC_NONE;
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/* Credit stuff */
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options->start_credits_text=NULL;
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options->end_credits_text=NULL;
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@ -42,6 +42,10 @@ struct ccx_s_options // Options from user parameters
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int nofontcolor;
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int notypesetting;
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struct ccx_boundary_time extraction_start, extraction_end; // Segment we actually process
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/* subtitle codec type */
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enum cxx_code_type codec;
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enum cxx_code_type nocodec;
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/* Credit stuff */
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char *start_credits_text;
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char *end_credits_text;
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@ -123,6 +123,7 @@ enum ccx_mpeg_descriptor
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CCX_MPEG_DSC_VBI_DATA_DESCRIPTOR = 0x45,
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CCX_MPEG_DSC_VBI_TELETEXT_DESCRIPTOR = 0x46,
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CCX_MPEG_DSC_TELETEXT_DESCRIPTOR = 0x56,
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CCX_MPEG_DSC_DVB_SUBTITLE = 0x59,
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};
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enum
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@ -191,7 +192,8 @@ enum ccx_bufferdata_type
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CCX_H264 = 3,
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CCX_HAUPPAGE = 4,
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CCX_TELETEXT = 5,
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CCX_PRIVATE_MPEG2_CC = 6
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CCX_PRIVATE_MPEG2_CC = 6,
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CCX_DVB_SUBTITLE = 7,
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};
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enum ccx_frame_type
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@ -209,6 +211,32 @@ typedef enum {
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UNDEF = 0xff
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} bool_t;
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enum cxx_code_type
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{
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CCX_CODEC_ANY,
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CCX_CODEC_TELETEXT,
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CCX_CODEC_DVB,
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CCX_CODEC_NONE,
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};
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/*
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* This macro to be used when you want to find out whether you
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* should parse f_sel subtitle codec type or not
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*
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* @param u_sel pass the codec selected by user to be searched in
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* all elementry stream, we ignore the not to be selected stream
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* if we find stream this is selected stream. since setting
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* selected stream and not selected to same codec does not
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* make ay sense.
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*
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* @param u_nsel pass the codec selected by user not to be parsed
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* we give false value if f_sel is equal to n_sel
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* and vice versa true if ...
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*
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* @param f_sel pass the codec name whom you are tesing to be feasible
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* to parse.
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*/
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#define IS_FEASIBLE(u_sel,u_nsel,f_sel) ( ( (u_sel) == CCX_CODEC_ANY && (u_nsel) != (f_sel) ) || (u_sel) == (f_sel) )
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#define CCX_TXT_FORBIDDEN 0 // Ignore teletext packets
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#define CCX_TXT_AUTO_NOT_YET_FOUND 1
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#define CCX_TXT_IN_USE 2 // Positive autodetected, or forced, etc
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1643
src/dvb_subtitle_decoder.c
Normal file
1643
src/dvb_subtitle_decoder.c
Normal file
File diff suppressed because it is too large
Load Diff
74
src/dvb_subtitle_decoder.h
Normal file
74
src/dvb_subtitle_decoder.h
Normal file
@ -0,0 +1,74 @@
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/*
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* DVB subtitle decoding
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* Copyright (c) 2014 Anshul
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* License: LGPL
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*
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* This file is part of CCEXtractor
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* You should have received a copy of the GNU Lesser General Public
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* License along with CCExtractor; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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/**
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* @file dvbsub.c
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*/
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#ifndef DVBSUBDEC_H
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#define DVBSUBDEC_H
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#define MAX_LANGUAGE_PER_DESC 5
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struct dvb_config
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{
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unsigned char n_language;
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unsigned int lang_index[MAX_LANGUAGE_PER_DESC];
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/* subtitle type */
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unsigned char sub_type[MAX_LANGUAGE_PER_DESC];
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/* composition page id */
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unsigned short composition_id[MAX_LANGUAGE_PER_DESC];
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/* ancillary_page_id */
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unsigned short ancillary_id[MAX_LANGUAGE_PER_DESC];
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};
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/**
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* @param composition_id composition-page_id found in Subtitle descriptors
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* associated with subtitle stream in the PMT
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* it could be -1 if not found in PMT.
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* @param ancillary_id ancillary-page_id found in Subtitle descriptors
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* associated with subtitle stream in the PMT.
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* it could be -1 if not found in PMT.
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*
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* @return DVB context kept as void* for abstraction
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*
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*/
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void* dvbsub_init_decoder(int composition_id,int ancillary_id);
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int dvbsub_close_decoder(void *dvb_ctx);
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/**
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* @param dvb_ctx PreInitialized DVB context using DVB
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* @param data output subtitle data, to be implemented
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* @param data_size Output subtitle data size. pass the pointer to an intiger, NOT to be NULL.
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* @param buf buffer containg segment data, first sync byte needto 0x0f.
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* does not include data_identifier and subtitle_stream_id.
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* @param buf_size size of buf buffer
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*
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* @return -1 on error
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*/
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int dvbsub_decode(void *dvb_ctx,
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void *data, int *data_size,
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const unsigned char *buf,int buf_size);
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/**
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* @func parse_dvb_description
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*
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* data pointer to this function should be after description length and description tag is parsed
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*
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* @param cfg preallocated dvb_config structure where parsed description will be stored,Not to be NULL
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*
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* @return return -1 if invalid data found other wise 0 if everything goes well
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* errno is set is to EINVAL if invalid data is found
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*/
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int parse_dvb_description (struct dvb_config* cfg,unsigned char*data,unsigned int len);
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#endif
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@ -6,6 +6,7 @@
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#endif
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#include "708.h"
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#include "dvb_subtitle_decoder.h"
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// IMPORTED TRASH INFO, REMOVE
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extern long num_nal_unit_type_7;
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@ -43,10 +44,10 @@ unsigned char *filebuffer;
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LLONG filebuffer_start; // Position of buffer start relative to file
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int filebuffer_pos; // Position of pointer relative to buffer start
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int bytesinbuffer; // Number of bytes we actually have on buffer
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extern void *cxx_dvb_context;
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LLONG process_raw_with_field (void);
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// Program stream specific data grabber
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LLONG ps_getmoredata(void)
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{
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@ -598,6 +599,12 @@ void general_loop(void)
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if (pts_set)
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set_fts(); // Try to fix timing from TS data
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}
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else if(ccx_bufferdatatype == CCX_DVB_SUBTITLE)
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{
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int out_size = 0;
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dvbsub_decode(cxx_dvb_context,NULL,&out_size,buffer + 2,inbuf);
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got = inbuf;
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}
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else if (ccx_bufferdatatype == CCX_PES)
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{
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got = process_m2v (buffer, inbuf);
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@ -560,6 +560,7 @@ void usage (void)
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mprint ("generate a .srt file, with only data from 3:00 to 5:00 in the input file(s)\n");
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mprint ("and then add that (huge) delay, which would make the final file start at\n");
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mprint ("5:00 and end at 7:00.\n\n");
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mprint ("Options that affect what segment of the input file(s) to process:\n");
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mprint (" -startat time: Only write caption information that starts after the\n");
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mprint (" given time.\n");
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@ -572,6 +573,24 @@ void usage (void)
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mprint (" output formats. In all formats with timing information\n");
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mprint (" the times are unchanged.\n");
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mprint ("-scr --screenfuls num: Write 'num' screenfuls and terminate processing.\n\n");
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mprint ("Options that affect which codec is to be used have to be searched in input\n");
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mprint (" If codec type is not selected then first elementry stream suitable for \n"
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" subtitle is selected, please consider -teletext -noteletext override this\n"
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" option.\n"
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" -cocdec dvbsub select the dvb subtitle from all elementry stream,\n"
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" if stream of dvb subtitle type is not found then \n"
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" nothing is selected and no subtitle is generated\n"
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" -nocodec dvbsub ignore dvb subtitle and follow default behaviour\n"
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" -codec teletext select the teletext subtitle from elementry stream\n"
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" -nocodec teletext ignore teletext subtitle\n"
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" NOTE: option given in form -foo=bar ,-foo = bar and --foo=bar are invalid\n"
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" valid option are only in form -foo bar\n"
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" nocodec and codec parameter must not be same if found to be same \n"
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" then parameter of nocodec is ignored, this flag should be passed \n"
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" once more then one are not supported yet and last parameter would \n"
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" taken in consideration\n");
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mprint ("Adding start and end credits:\n");
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mprint (" CCExtractor can _try_ to add a custom message (for credits for example) at\n");
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mprint (" the start and end of the file, looking for a window where there are no\n");
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@ -818,6 +837,45 @@ void parse_parameters (int argc, char *argv[])
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set_input_format (argv[i]+4);
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continue;
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}
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/*user specified subtitle to be selected */
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if(!strcmp (argv[i],"-codec"))
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{
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i++;
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if(!strcmp (argv[i],"teletext"))
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{
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ccx_options.codec = CCX_CODEC_TELETEXT;
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}
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else if(!strcmp (argv[i],"dvbsub"))
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{
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ccx_options.codec = CCX_CODEC_DVB;
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}
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else
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{
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mprint("Invalid option for codec %s\n",argv[i]);
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}
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continue;
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}
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/*user specified subtitle to be selected */
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if(!strcmp (argv[i],"-nocodec"))
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{
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i++;
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if(!strcmp (argv[i],"teletext"))
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{
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ccx_options.nocodec = CCX_CODEC_TELETEXT;
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}
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else if(!strcmp (argv[i],"dvbsub"))
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{
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ccx_options.nocodec = CCX_CODEC_DVB;
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}
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else
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{
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mprint("Invalid option for codec %s\n",argv[i]);
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}
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continue;
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}
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/* Output file formats */
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if (strcmp (argv[i],"-srt")==0 ||
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strcmp (argv[i],"-dvdraw")==0 ||
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@ -1367,11 +1425,13 @@ void parse_parameters (int argc, char *argv[])
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}
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if (strcmp (argv[i],"-teletext")==0)
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{
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ccx_options.codec = CCX_CODEC_TELETEXT;
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ccx_options.teletext_mode=CCX_TXT_IN_USE;
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continue;
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}
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if (strcmp (argv[i],"-noteletext")==0)
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{
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ccx_options.nocodec = CCX_CODEC_TELETEXT;
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ccx_options.teletext_mode=CCX_TXT_FORBIDDEN;
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continue;
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}
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@ -17,7 +17,7 @@ static long haup_capbuflen = 0; // Bytes read in haup_capbuf
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unsigned TS_program_number = 0; // Identifier for current program
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unsigned pmtpid = 0; // PID for Program Map Table
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unsigned cap_stream_type=CCX_STREAM_TYPE_UNKNOWNSTREAM; // Stream type for cappid
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extern void *cxx_dvb_context;
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// Descriptions for ts ccx_stream_type
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const char *desc[256];
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@ -464,6 +464,11 @@ LLONG ts_getmoredata(void)
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ccx_bufferdatatype = CCX_H264;
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tstr = "H.264";
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}
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else if ( cap_stream_type == CCX_STREAM_TYPE_PRIVATE_MPEG2 && cxx_dvb_context )
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{
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ccx_bufferdatatype = CCX_DVB_SUBTITLE;
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tstr = "DVB subtitle";
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}
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else if ( cap_stream_type == CCX_STREAM_TYPE_UNKNOWNSTREAM && ccx_options.hauppauge_mode)
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{
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ccx_bufferdatatype = CCX_HAUPPAGE;
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@ -566,13 +571,6 @@ LLONG ts_getmoredata(void)
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haup_capbuflen=0;
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}
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if( !((stream_id&0xf0)==0xe0)) // 0xBD = private stream
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{
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// ??? Shouldn't happen. Complain and try again.
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mprint("Not a video PES header!\n");
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continue;
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}
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dbg_print(CCX_DMT_VERBOSE, "TS payload start video PES id: %d len: %ld\n",
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stream_id, capbuflen);
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@ -6,8 +6,10 @@
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*/
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#include "ccextractor.h"
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#include "dvb_subtitle_decoder.h"
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static unsigned pmt_warning_shown=0; // Only display warning once
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void *cxx_dvb_context = NULL;
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// PMTs table
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PAT_entry pmt_array[TS_PMT_MAP_SIZE] = { 0 };
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@ -64,6 +66,8 @@ void clear_PMT_array (void)
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int parse_PMT (int pos)
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{
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int must_flush=0;
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int ret = 0;
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unsigned char desc_len = 0;
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if ((ccx_options.ts_forced_cappid || (ccx_options.teletext_mode==CCX_TXT_IN_USE && ccx_options.ts_cappid)) &&
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cap_stream_type!=CCX_STREAM_TYPE_UNKNOWNSTREAM) // Already know what we need, skip
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@ -190,20 +194,47 @@ int parse_PMT (int pos)
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for( unsigned i=0; i < stream_data && (i+4)<payload_length; i+=5)
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{
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unsigned ccx_stream_type = payload_start[i];
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unsigned elementary_PID = (((payload_start[i+1] & 0x1F) << 8)
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unsigned ccx_stream_type = payload_start[i];
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unsigned elementary_PID = (((payload_start[i+1] & 0x1F) << 8)
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| payload_start[i+2]);
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unsigned ES_info_length = (((payload_start[i+3] & 0x0F) << 8)
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unsigned ES_info_length = (((payload_start[i+3] & 0x0F) << 8)
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| payload_start[i+4]);
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/* There is no information about elementry stream */
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if(!ES_info_length)
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continue;
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if (ccx_options.ts_cappid==0 && ccx_stream_type==ccx_options.ts_datastreamtype) // Found a stream with the type the user wants
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{
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ccx_options.ts_forced_cappid=1;
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ccx_options.ts_cappid = newcappid = elementary_PID;
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cap_stream_type=CCX_STREAM_TYPE_UNKNOWNSTREAM;
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}
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if(IS_FEASIBLE(ccx_options.codec,ccx_options.nocodec,CCX_CODEC_DVB) && !ccx_options.ts_cappid && ccx_stream_type == CCX_STREAM_TYPE_PRIVATE_MPEG2)
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{
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unsigned char *es_info = payload_start + i + 5;
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for (desc_len = 0;(payload_start + i + 5 + ES_info_length) - es_info ;es_info += desc_len)
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{
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enum ccx_mpeg_descriptor descriptor_tag = (enum ccx_mpeg_descriptor)(*es_info++);
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desc_len = (*es_info++);
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if(CCX_MPEG_DSC_DVB_SUBTITLE == descriptor_tag)
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{
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struct dvb_config cnf;
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memset((void*)&cnf,0,sizeof(struct dvb_config));
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ret = parse_dvb_description(&cnf,es_info,desc_len);
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if(ret < 0)
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break;
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cxx_dvb_context = dvbsub_init_decoder(cnf.composition_id[0],cnf.ancillary_id[0]);
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if (cxx_dvb_context == NULL)
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break;
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ccx_options.ts_cappid = newcappid = elementary_PID;
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cap_stream_type = newcap_stream_type = ccx_stream_type;
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}
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}
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}
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if ((ccx_options.teletext_mode==CCX_TXT_AUTO_NOT_YET_FOUND ||
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if (IS_FEASIBLE(ccx_options.codec,ccx_options.nocodec,CCX_CODEC_TELETEXT) && (ccx_options.teletext_mode==CCX_TXT_AUTO_NOT_YET_FOUND ||
|
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(ccx_options.teletext_mode==CCX_TXT_IN_USE && !ccx_options.ts_cappid)) // Want teletext but don't know the PID yet
|
||||
&& ccx_stream_type == CCX_STREAM_TYPE_PRIVATE_MPEG2) // MPEG-2 Packetized Elementary Stream packets containing private data
|
||||
{
|
||||
@ -551,6 +582,10 @@ void process_ccx_mpeg_descriptor (unsigned char *data, unsigned length)
|
||||
dbg_print (CCX_DMT_PMT, " Initial page: %02X\n",teletext_page_number);
|
||||
}
|
||||
break;
|
||||
case CCX_MPEG_DSC_DVB_SUBTITLE:
|
||||
dbg_print(CCX_DMT_PMT, " DVB Subtitle descriptor\n");
|
||||
break;
|
||||
|
||||
default:
|
||||
if (data[0]==CCX_MPEG_DSC_REGISTRATION) // Registration descriptor, could be useful eventually
|
||||
break;
|
||||
|
Loading…
Reference in New Issue
Block a user