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libavcodec
dv_tablegen.h
Go to the documentation of this file.
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/*
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* Header file for hardcoded DV tables
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*
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* Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; 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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#ifndef AVCODEC_DV_TABLEGEN_H
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#define AVCODEC_DV_TABLEGEN_H
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#include <stdint.h>
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#include "
dv_vlc_data.h
"
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#if CONFIG_SMALL
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#define DV_VLC_MAP_RUN_SIZE 15
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#define DV_VLC_MAP_LEV_SIZE 23
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#else
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#define DV_VLC_MAP_RUN_SIZE 64
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#define DV_VLC_MAP_LEV_SIZE 512 //FIXME sign was removed so this should be /2 but needs check
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#endif
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/* VLC encoding lookup table */
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typedef
struct
dv_vlc_pair
{
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uint32_t
vlc
;
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uint32_t
size
;
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}
dv_vlc_pair
;
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#if CONFIG_HARDCODED_TABLES
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#define dv_vlc_map_tableinit()
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#include "libavcodec/dv_tables.h"
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#else
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static
struct
dv_vlc_pair
dv_vlc_map
[
DV_VLC_MAP_RUN_SIZE
][
DV_VLC_MAP_LEV_SIZE
];
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static
void
dv_vlc_map_tableinit
(
void
)
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{
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int
i, j;
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for
(i = 0; i <
NB_DV_VLC
- 1; i++) {
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if
(
dv_vlc_run
[i] >=
DV_VLC_MAP_RUN_SIZE
)
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continue
;
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#if CONFIG_SMALL
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if
(
dv_vlc_level
[i] >=
DV_VLC_MAP_LEV_SIZE
)
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continue
;
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#endif
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if
(
dv_vlc_map
[
dv_vlc_run
[i]][
dv_vlc_level
[i]].
size
!= 0)
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continue
;
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dv_vlc_map
[
dv_vlc_run
[i]][
dv_vlc_level
[i]].
vlc
=
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dv_vlc_bits
[i] << (!!
dv_vlc_level
[i]);
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dv_vlc_map
[
dv_vlc_run
[i]][
dv_vlc_level
[i]].
size
=
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dv_vlc_len
[i] + (!!
dv_vlc_level
[i]);
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}
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for
(i = 0; i <
DV_VLC_MAP_RUN_SIZE
; i++) {
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#if CONFIG_SMALL
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for
(j = 1; j <
DV_VLC_MAP_LEV_SIZE
; j++) {
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if
(
dv_vlc_map
[i][j].
size
== 0) {
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dv_vlc_map
[i][j].
vlc
=
dv_vlc_map
[0][j].
vlc
|
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(
dv_vlc_map
[i-1][0].
vlc
<< (
dv_vlc_map
[0][j].
size
));
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dv_vlc_map
[i][j].
size
=
dv_vlc_map
[i-1][0].
size
+
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dv_vlc_map
[0][j].
size
;
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}
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}
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#else
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for
(j = 1; j < DV_VLC_MAP_LEV_SIZE/2; j++) {
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if
(
dv_vlc_map
[i][j].
size
== 0) {
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dv_vlc_map
[i][j].
vlc
=
dv_vlc_map
[0][j].
vlc
|
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(
dv_vlc_map
[i-1][0].
vlc
<< (
dv_vlc_map
[0][j].
size
));
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dv_vlc_map
[i][j].
size
=
dv_vlc_map
[i-1][0].
size
+
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dv_vlc_map
[0][j].
size
;
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}
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dv_vlc_map
[i][((uint16_t)(-j))&0x1ff].
vlc
=
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dv_vlc_map
[i][j].
vlc
| 1;
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dv_vlc_map
[i][((uint16_t)(-j))&0x1ff].
size
=
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dv_vlc_map
[i][j].
size
;
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}
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#endif
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}
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}
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#endif
/* CONFIG_HARDCODED_TABLES */
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#endif
/* AVCODEC_DV_TABLEGEN_H */