1 /*****************************************************************************
2 * hxxx_sei.c: AVC/HEVC packetizers SEI handling
3 *****************************************************************************
4 * Copyright (C) 2001-2016 VLC authors and VideoLAN
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU Lesser General Public License as published by
8 * the Free Software Foundation; either version 2.1 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
19 *****************************************************************************/
24 #include <vlc_common.h>
25 #include <vlc_block.h>
30 #include "hxxx_ep3b.h"
32 void HxxxParse_AnnexB_SEI(const uint8_t *p_buf
, size_t i_buf
,
33 uint8_t i_header
, pf_hxxx_sei_callback cb
, void *cbdata
)
35 if( hxxx_strip_AnnexB_startcode( &p_buf
, &i_buf
) )
36 HxxxParseSEI(p_buf
, i_buf
, i_header
, cb
, cbdata
);
39 void HxxxParseSEI(const uint8_t *p_buf
, size_t i_buf
,
40 uint8_t i_header
, pf_hxxx_sei_callback pf_callback
, void *cbdata
)
43 bool b_continue
= true;
45 if( i_buf
<= i_header
)
48 struct hxxx_bsfw_ep3b_ctx_s bsctx
;
49 hxxx_bsfw_ep3b_ctx_init( &bsctx
);
50 bs_init_custom( &s
, &p_buf
[i_header
], i_buf
- i_header
, /* skip nal unit header */
51 &hxxx_bsfw_ep3b_callbacks
, &bsctx
);
54 while( !bs_eof( &s
) && bs_aligned( &s
) && b_continue
)
58 while( !bs_eof( &s
) )
60 const uint8_t i_byte
= bs_read( &s
, 8 );
71 while( !bs_eof( &s
) )
73 const uint8_t i_byte
= bs_read( &s
, 8 );
86 hxxx_sei_data_t sei_data
;
87 sei_data
.i_type
= i_type
;
89 /* Save start offset */
90 const unsigned i_start_bit_pos
= bs_pos( &s
);
93 /* Look for pic timing, do not decode locally */
94 case HXXX_SEI_PIC_TIMING
:
97 b_continue
= pf_callback( &sei_data
, cbdata
);
100 /* Look for user_data_registered_itu_t_t35 */
101 case HXXX_SEI_USER_DATA_REGISTERED_ITU_T_T35
:
104 uint8_t *p_t35
= malloc( i_size
);
108 for( i_t35
= 0; i_t35
<i_size
&& !bs_eof( &s
); i_t35
++ )
109 p_t35
[i_t35
] = bs_read( &s
, 8 );
114 /* TS 101 154 Auxiliary Data and H264/AVC video */
115 if( i_t35
> 4 && p_t35
[0] == 0xb5 /* United States */ )
117 if( p_t35
[1] == 0x00 && p_t35
[2] == 0x31 && /* US provider code for ATSC / DVB1 */
120 switch( VLC_FOURCC(p_t35
[3],p_t35
[4],p_t35
[5],p_t35
[6]) )
122 case VLC_FOURCC('G', 'A', '9', '4'):
123 if( p_t35
[7] == 0x03 )
125 sei_data
.itu_t35
.type
= HXXX_ITU_T35_TYPE_CC
;
126 sei_data
.itu_t35
.u
.cc
.i_data
= i_t35
- 8;
127 sei_data
.itu_t35
.u
.cc
.p_data
= &p_t35
[8];
128 b_continue
= pf_callback( &sei_data
, cbdata
);
135 else if( p_t35
[1] == 0x00 && p_t35
[2] == 0x2f && /* US provider code for DirecTV */
136 p_t35
[3] == 0x03 && i_t35
> 5 )
138 /* DirecTV does not use GA94 user_data identifier */
139 sei_data
.itu_t35
.type
= HXXX_ITU_T35_TYPE_CC
;
140 sei_data
.itu_t35
.u
.cc
.i_data
= i_t35
- 5;
141 sei_data
.itu_t35
.u
.cc
.p_data
= &p_t35
[5];
142 b_continue
= pf_callback( &sei_data
, cbdata
);
149 case HXXX_SEI_FRAME_PACKING_ARRANGEMENT
:
152 if ( !bs_read1( &s
) )
154 sei_data
.frame_packing
.type
= bs_read( &s
, 7 );
156 if( bs_read( &s
, 6 ) == 2 ) /*intpr type*/
157 sei_data
.frame_packing
.b_left_first
= false;
159 sei_data
.frame_packing
.b_left_first
= true;
160 sei_data
.frame_packing
.b_flipped
= bs_read1( &s
);
161 sei_data
.frame_packing
.b_fields
= bs_read1( &s
);
162 sei_data
.frame_packing
.b_frame0
= bs_read1( &s
);
164 else sei_data
.frame_packing
.type
= FRAME_PACKING_CANCEL
;
168 /* Look for SEI recovery point */
169 case HXXX_SEI_RECOVERY_POINT
:
172 b_continue
= pf_callback( &sei_data
, cbdata
);
175 case HXXX_SEI_MASTERING_DISPLAY_COLOUR_VOLUME
:
177 for ( size_t i
= 0; i
< 6 ; ++i
)
178 sei_data
.colour_volume
.primaries
[i
] = bs_read( &s
, 16 );
179 for ( size_t i
= 0; i
< 2 ; ++i
)
180 sei_data
.colour_volume
.white_point
[i
] = bs_read( &s
, 16 );
181 sei_data
.colour_volume
.max_luminance
= bs_read( &s
, 32 );
182 sei_data
.colour_volume
.min_luminance
= bs_read( &s
, 32 );
183 if( bs_error( &s
) ) /* not enough data */
185 b_continue
= pf_callback( &sei_data
, cbdata
);
188 case HXXX_SEI_CONTENT_LIGHT_LEVEL
:
190 sei_data
.content_light_lvl
.MaxCLL
= bs_read( &s
, 16 );
191 sei_data
.content_light_lvl
.MaxFALL
= bs_read( &s
, 16 );
192 if( bs_error( &s
) ) /* not enough data */
194 b_continue
= pf_callback( &sei_data
, cbdata
);
201 const unsigned i_end_bit_pos
= bs_pos( &s
);
203 /* Skip unsparsed content */
204 if( i_end_bit_pos
- i_start_bit_pos
> i_size
* 8 ) /* Something went wrong with _ue reads */
206 bs_skip( &s
, i_size
* 8 - ( i_end_bit_pos
- i_start_bit_pos
) );