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FFmpeg/libavcodec/cfhddata.c

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avcodec: Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Alpha requires addition of GBRAP12 pixel format.
2016-01-30 19:39:48 +02:00
/*
* Copyright (c) 2015 Kieran Kunhya
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
Add Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Further fixes and refactorings by Anton Khirnov <anton@khirnov.net>, Diego Biurrun <diego@biurrun.de>, Vittorio Giovara <vittorio.giovara@gmail.com> Signed-off-by: Diego Biurrun <diego@biurrun.de>
2016-01-30 19:39:48 +02:00
#include <stdint.h>
#include "libavutil/attributes.h"
avcodec: Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Alpha requires addition of GBRAP12 pixel format.
2016-01-30 19:39:48 +02:00
#include "cfhd.h"
avcodec/cfhd, cfhddata: Free VLC as soon as it is not needed The VLC is only used to initialize RL VLC. Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 18:02:17 +02:00
#include "vlc.h"
avcodec: Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Alpha requires addition of GBRAP12 pixel format.
2016-01-30 19:39:48 +02:00
Add Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Further fixes and refactorings by Anton Khirnov <anton@khirnov.net>, Diego Biurrun <diego@biurrun.de>, Vittorio Giovara <vittorio.giovara@gmail.com> Signed-off-by: Diego Biurrun <diego@biurrun.de>
2016-01-30 19:39:48 +02:00
#define NB_VLC_TABLE_9 (71 + 3)
#define NB_VLC_TABLE_18 (263 + 1)
avcodec/cfhddata: Avoid code tables cfhddata.c initializes a RL VLC table via code tables and corresponding tables for length, run and level. code and length tables are used to initialize a VLC, no symbol table is used. Afterwards the symbols of said VLC are just the indices of the corresponding entries in the code and length table that were used for initialization; they can therefore be used to get the matching level and run entry and they are not used for anything else. Therefore one can just permute these tables without changing the resulting RL VLC tables. This commit does just this. It permutes these tables so that the code tables are ordered from left to right in the resulting tree and then switches to ff_init_vlc_from_lengths(), which allows to remove the codes table altogether. Given that these tables are constructed on the stack, this also reduces stack usage, potentially fixing part of #9399. (The size of the tables on the stack decreases from 4752 to 2640.) Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 04:39:16 +02:00
typedef struct CFHD_RL_ELEM {
uint16_t run;
uint8_t level;
uint8_t len;
} CFHD_RL_ELEM;
static const CFHD_RL_ELEM table_9_vlc[NB_VLC_TABLE_9] = {
{ 1, 0, 1 }, { 1, 1, 2 }, { 1, 2, 4 }, { 1, 3, 5 },
{ 1, 6, 7 }, { 1, 15, 11 }, { 1, 26, 14 }, { 1, 27, 14 },
{ 1, 23, 13 }, { 1, 36, 16 }, { 1, 40, 17 }, { 1, 41, 17 },
{ 1, 32, 15 }, { 1, 48, 19 }, { 1, 49, 19 }, { 1, 51, 20 },
{ 1, 52, 20 }, { 1, 50, 19 }, { 1, 42, 17 }, { 1, 37, 16 },
{ 1, 33, 15 }, { 1, 24, 13 }, { 1, 13, 10 }, { 1, 10, 9 },
{ 1, 8, 8 }, { 1, 5, 6 }, { 80, 0, 8 }, { 1, 16, 11 },
{ 1, 19, 12 }, { 1, 20, 12 }, { 1, 14, 10 }, { 120, 0, 9 },
{ 320, 0, 8 }, { 1, 11, 9 }, { 1, 28, 14 }, { 1, 29, 14 },
{ 1, 25, 13 }, { 1, 21, 12 }, { 1, 17, 11 }, { 1, 34, 15 },
{ 1, 45, 18 }, { 1, 46, 18 }, { 1, 47, 18 }, { 1, 57, 23 },
{ 1, 58, 23 }, { 1, 59, 23 }, { 1, 62, 24 }, { 1, 63, 24 },
{ 1, 56, 22 }, { 1, 60, 23 }, { 1, 61, 24 }, { 1, 64, 25 },
{ 0, 64, 26 }, { 1, 64, 26 }, { 1, 53, 20 }, { 1, 54, 20 },
{ 1, 55, 20 }, { 1, 38, 16 }, { 1, 30, 14 }, { 1, 31, 14 },
{ 1, 43, 17 }, { 1, 44, 17 }, { 1, 39, 16 }, { 1, 35, 15 },
{ 1, 22, 12 }, { 1, 18, 11 }, { 32, 0, 6 }, { 12, 0, 5 },
{ 1, 4, 5 }, { 160, 0, 6 }, { 1, 7, 7 }, { 1, 9, 8 },
{ 100, 0, 9 }, { 1, 12, 9 },
Add Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Further fixes and refactorings by Anton Khirnov <anton@khirnov.net>, Diego Biurrun <diego@biurrun.de>, Vittorio Giovara <vittorio.giovara@gmail.com> Signed-off-by: Diego Biurrun <diego@biurrun.de>
2016-01-30 19:39:48 +02:00
};
avcodec/cfhddata: Avoid code tables cfhddata.c initializes a RL VLC table via code tables and corresponding tables for length, run and level. code and length tables are used to initialize a VLC, no symbol table is used. Afterwards the symbols of said VLC are just the indices of the corresponding entries in the code and length table that were used for initialization; they can therefore be used to get the matching level and run entry and they are not used for anything else. Therefore one can just permute these tables without changing the resulting RL VLC tables. This commit does just this. It permutes these tables so that the code tables are ordered from left to right in the resulting tree and then switches to ff_init_vlc_from_lengths(), which allows to remove the codes table altogether. Given that these tables are constructed on the stack, this also reduces stack usage, potentially fixing part of #9399. (The size of the tables on the stack decreases from 4752 to 2640.) Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 04:39:16 +02:00
static const CFHD_RL_ELEM table_18_vlc[NB_VLC_TABLE_18] = {
{ 1, 0, 1 }, { 1, 1, 2 }, { 1, 4, 6 }, { 1, 14, 10 },
{ 1, 23, 12 }, { 1, 41, 15 }, { 1, 54, 17 }, { 1, 69, 19 },
{ 1, 77, 20 }, { 1, 85, 21 }, { 1, 108, 24 }, { 1, 237, 25 },
{ 1, 238, 25 }, { 1, 101, 23 }, { 1, 172, 25 }, { 1, 173, 25 },
{ 1, 170, 25 }, { 1, 171, 25 }, { 1, 227, 25 }, { 1, 162, 25 },
{ 1, 156, 25 }, { 1, 157, 25 }, { 1, 243, 25 }, { 1, 134, 25 },
{ 1, 135, 25 }, { 1, 136, 25 }, { 1, 128, 25 }, { 1, 129, 25 },
{ 1, 247, 25 }, { 1, 127, 25 }, { 1, 178, 25 }, { 1, 179, 25 },
{ 1, 214, 25 }, { 1, 118, 25 }, { 1, 204, 25 }, { 1, 205, 25 },
{ 1, 198, 25 }, { 1, 199, 25 }, { 1, 245, 25 }, { 1, 246, 25 },
{ 1, 242, 25 }, { 1, 244, 25 }, { 1, 230, 25 }, { 1, 119, 25 },
{ 1, 193, 25 }, { 1, 194, 25 }, { 1, 186, 25 }, { 1, 187, 25 },
{ 1, 211, 25 }, { 1, 190, 25 }, { 1, 163, 25 }, { 1, 164, 25 },
{ 1, 220, 25 }, { 1, 221, 25 }, { 1, 216, 25 }, { 1, 217, 25 },
{ 1, 212, 25 }, { 1, 213, 25 }, { 1, 206, 25 }, { 1, 208, 25 },
{ 1, 209, 25 }, { 1, 210, 25 }, { 1, 122, 25 }, { 1, 248, 25 },
{ 1, 235, 25 }, { 1, 148, 25 }, { 1, 253, 25 }, { 1, 254, 25 },
{ 1, 123, 25 }, { 1, 124, 25 }, { 1, 215, 25 }, { 1, 117, 25 },
{ 1, 234, 25 }, { 1, 236, 25 }, { 1, 142, 25 }, { 1, 143, 25 },
{ 1, 153, 25 }, { 1, 154, 25 }, { 1, 176, 25 }, { 1, 177, 25 },
{ 1, 174, 25 }, { 1, 175, 25 }, { 1, 184, 25 }, { 1, 185, 25 },
{ 1, 240, 25 }, { 1, 241, 25 }, { 1, 239, 25 }, { 1, 141, 25 },
{ 1, 139, 25 }, { 1, 140, 25 }, { 1, 125, 25 }, { 1, 126, 25 },
{ 1, 130, 25 }, { 1, 131, 25 }, { 1, 228, 25 }, { 1, 229, 25 },
{ 1, 232, 25 }, { 1, 233, 25 }, { 1, 132, 25 }, { 1, 133, 25 },
{ 1, 137, 25 }, { 1, 138, 25 }, { 1, 255, 25 }, { 1, 116, 26 },
{ 0, 255, 26 }, { 1, 249, 25 }, { 1, 250, 25 }, { 1, 251, 25 },
{ 1, 252, 25 }, { 1, 120, 25 }, { 1, 121, 25 }, { 1, 222, 25 },
{ 1, 224, 25 }, { 1, 218, 25 }, { 1, 219, 25 }, { 1, 200, 25 },
{ 1, 201, 25 }, { 1, 191, 25 }, { 1, 192, 25 }, { 1, 149, 25 },
{ 1, 150, 25 }, { 1, 151, 25 }, { 1, 152, 25 }, { 1, 146, 25 },
{ 1, 147, 25 }, { 1, 144, 25 }, { 1, 145, 25 }, { 1, 165, 25 },
{ 1, 166, 25 }, { 1, 167, 25 }, { 1, 168, 25 }, { 1, 158, 25 },
{ 1, 159, 25 }, { 1, 223, 25 }, { 1, 169, 25 }, { 1, 207, 25 },
{ 1, 197, 25 }, { 1, 202, 25 }, { 1, 203, 25 }, { 1, 188, 25 },
{ 1, 189, 25 }, { 1, 225, 25 }, { 1, 226, 25 }, { 1, 195, 25 },
{ 1, 196, 25 }, { 1, 182, 25 }, { 1, 183, 25 }, { 1, 231, 25 },
{ 1, 155, 25 }, { 1, 160, 25 }, { 1, 161, 25 }, { 1, 48, 16 },
{ 1, 36, 14 }, { 1, 30, 13 }, { 1, 19, 11 }, { 1, 11, 9 },
{ 32, 0, 9 }, { 1, 15, 10 }, { 1, 24, 12 }, { 1, 42, 15 },
{ 1, 62, 18 }, { 1, 70, 19 }, { 1, 94, 22 }, { 1, 180, 25 },
{ 1, 181, 25 }, { 1, 109, 24 }, { 1, 102, 23 }, { 1, 86, 21 },
{ 1, 78, 20 }, { 1, 55, 17 }, { 1, 49, 16 }, { 1, 37, 14 },
{ 1, 31, 13 }, { 1, 25, 12 }, { 1, 43, 15 }, { 1, 63, 18 },
{ 1, 71, 19 }, { 1, 79, 20 }, { 1, 87, 21 }, { 1, 88, 21 },
{ 1, 56, 17 }, { 1, 50, 16 }, { 1, 38, 14 }, { 180, 0, 13 },
{ 1, 6, 7 }, { 1, 3, 5 }, { 1, 12, 9 }, { 1, 20, 11 },
{ 100, 0, 11 }, { 60, 0, 10 }, { 20, 0, 8 }, { 12, 0, 7 },
{ 1, 9, 8 }, { 1, 16, 10 }, { 1, 32, 13 }, { 1, 44, 15 },
{ 1, 64, 18 }, { 1, 72, 19 }, { 1, 80, 20 }, { 1, 95, 22 },
{ 1, 96, 22 }, { 1, 110, 24 }, { 1, 111, 24 }, { 1, 103, 23 },
{ 1, 104, 23 }, { 1, 105, 23 }, { 1, 57, 17 }, { 1, 65, 18 },
{ 1, 73, 19 }, { 1, 81, 20 }, { 1, 89, 21 }, { 1, 97, 22 },
{ 1, 98, 22 }, { 1, 58, 17 }, { 1, 39, 14 }, { 1, 26, 12 },
{ 1, 21, 11 }, { 1, 13, 9 }, { 1, 7, 7 }, { 1, 5, 6 },
{ 1, 10, 8 }, { 1, 33, 13 }, { 1, 51, 16 }, { 1, 66, 18 },
{ 1, 74, 19 }, { 1, 82, 20 }, { 1, 90, 21 }, { 1, 91, 21 },
{ 1, 59, 17 }, { 1, 45, 15 }, { 1, 52, 16 }, { 1, 67, 18 },
{ 1, 75, 19 }, { 1, 83, 20 }, { 1, 112, 24 }, { 1, 113, 24 },
{ 1, 106, 23 }, { 1, 99, 22 }, { 1, 92, 21 }, { 1, 68, 18 },
{ 1, 76, 19 }, { 1, 84, 20 }, { 1, 107, 23 }, { 1, 114, 24 },
{ 1, 115, 24 }, { 1, 100, 22 }, { 1, 93, 21 }, { 1, 46, 15 },
{ 1, 27, 12 }, { 1, 34, 13 }, { 320, 0, 13 }, { 1, 28, 12 },
{ 1, 17, 10 }, { 1, 22, 11 }, { 1, 40, 14 }, { 1, 53, 16 },
{ 1, 60, 17 }, { 1, 61, 17 }, { 1, 47, 15 }, { 1, 35, 13 },
{ 1, 29, 12 }, { 1, 18, 10 }, { 1, 8, 7 }, { 1, 2, 3 },
avcodec: Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Alpha requires addition of GBRAP12 pixel format.
2016-01-30 19:39:48 +02:00
};
avcodec/cfhddata: Avoid code duplication when creating codebooks Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 17:56:48 +02:00
static av_cold int cfhd_init_vlc(CFHD_RL_VLC_ELEM out[], unsigned out_size,
const CFHD_RL_ELEM table_vlc[], unsigned table_size,
avcodec/cfhddata: Reduce stack usage Creating CFHD RL VLC tables works by first extending the codes by the sign, followed by creating a VLC, followed by deriving the RL VLC from this VLC (which is then discarded). Extending the codes uses stack arrays. The tables used to initialize the VLC are already sorted from left-to-right in the tree. This means that the corresponding VLC entries are generally also ascending, but not always: Entries from subtables always follow the corresponding main table although it is possible for the right-most node to fit into the main table. This suggests that one can try to use the final destination buffer as scratch buffer for the tables with sign included. Unfortunately it works for neither of the tables if one uses the right-most part of the RL VLC buffer as scratch buffer; using the left-most part of the RL VLC buffer as scratch buffer might work if one traverses the VLC entries from end to start. But it works only for the little RL VLC (table 9), not for table 18. Therefore this patch uses the RL VLC buffer for table 9 as scratch buffer for creating the bigger table 18. Afterwards the left part of the buffer for table 9 is used as scratch buffer to create table 9. This fixes the cfhd part of ticket #9399 (if it is not already fixed). Notice that I do not consider the previous stack usage excessive. Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 20:09:18 +02:00
CFHD_RL_VLC_ELEM tmp[], void *logctx)
avcodec: Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Alpha requires addition of GBRAP12 pixel format.
2016-01-30 19:39:48 +02:00
{
avcodec/cfhd, cfhddata: Free VLC as soon as it is not needed The VLC is only used to initialize RL VLC. Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 18:02:17 +02:00
VLC vlc;
avcodec/cfhddata: Avoid code duplication when creating codebooks Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 17:56:48 +02:00
unsigned j;
int ret;
avcodec: Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Alpha requires addition of GBRAP12 pixel format.
2016-01-30 19:39:48 +02:00
/** Similar to dv.c, generate signed VLC tables **/
avcodec/cfhddata: Avoid code duplication when creating codebooks Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 17:56:48 +02:00
for (unsigned i = j = 0; i < table_size; i++, j++) {
avcodec/cfhddata: Reduce stack usage Creating CFHD RL VLC tables works by first extending the codes by the sign, followed by creating a VLC, followed by deriving the RL VLC from this VLC (which is then discarded). Extending the codes uses stack arrays. The tables used to initialize the VLC are already sorted from left-to-right in the tree. This means that the corresponding VLC entries are generally also ascending, but not always: Entries from subtables always follow the corresponding main table although it is possible for the right-most node to fit into the main table. This suggests that one can try to use the final destination buffer as scratch buffer for the tables with sign included. Unfortunately it works for neither of the tables if one uses the right-most part of the RL VLC buffer as scratch buffer; using the left-most part of the RL VLC buffer as scratch buffer might work if one traverses the VLC entries from end to start. But it works only for the little RL VLC (table 9), not for table 18. Therefore this patch uses the RL VLC buffer for table 9 as scratch buffer for creating the bigger table 18. Afterwards the left part of the buffer for table 9 is used as scratch buffer to create table 9. This fixes the cfhd part of ticket #9399 (if it is not already fixed). Notice that I do not consider the previous stack usage excessive. Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 20:09:18 +02:00
tmp[j].len = table_vlc[i].len;
tmp[j].run = table_vlc[i].run;
tmp[j].level = table_vlc[i].level;
avcodec: Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Alpha requires addition of GBRAP12 pixel format.
2016-01-30 19:39:48 +02:00
/* Don't include the zero level nor escape bits */
avcodec/cfhddata: Avoid code duplication when creating codebooks Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 17:56:48 +02:00
if (table_vlc[i].level && table_vlc[i].run) {
avcodec/cfhddata: Reduce stack usage Creating CFHD RL VLC tables works by first extending the codes by the sign, followed by creating a VLC, followed by deriving the RL VLC from this VLC (which is then discarded). Extending the codes uses stack arrays. The tables used to initialize the VLC are already sorted from left-to-right in the tree. This means that the corresponding VLC entries are generally also ascending, but not always: Entries from subtables always follow the corresponding main table although it is possible for the right-most node to fit into the main table. This suggests that one can try to use the final destination buffer as scratch buffer for the tables with sign included. Unfortunately it works for neither of the tables if one uses the right-most part of the RL VLC buffer as scratch buffer; using the left-most part of the RL VLC buffer as scratch buffer might work if one traverses the VLC entries from end to start. But it works only for the little RL VLC (table 9), not for table 18. Therefore this patch uses the RL VLC buffer for table 9 as scratch buffer for creating the bigger table 18. Afterwards the left part of the buffer for table 9 is used as scratch buffer to create table 9. This fixes the cfhd part of ticket #9399 (if it is not already fixed). Notice that I do not consider the previous stack usage excessive. Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 20:09:18 +02:00
tmp[j].len++;
avcodec: Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Alpha requires addition of GBRAP12 pixel format.
2016-01-30 19:39:48 +02:00
j++;
avcodec/cfhddata: Reduce stack usage Creating CFHD RL VLC tables works by first extending the codes by the sign, followed by creating a VLC, followed by deriving the RL VLC from this VLC (which is then discarded). Extending the codes uses stack arrays. The tables used to initialize the VLC are already sorted from left-to-right in the tree. This means that the corresponding VLC entries are generally also ascending, but not always: Entries from subtables always follow the corresponding main table although it is possible for the right-most node to fit into the main table. This suggests that one can try to use the final destination buffer as scratch buffer for the tables with sign included. Unfortunately it works for neither of the tables if one uses the right-most part of the RL VLC buffer as scratch buffer; using the left-most part of the RL VLC buffer as scratch buffer might work if one traverses the VLC entries from end to start. But it works only for the little RL VLC (table 9), not for table 18. Therefore this patch uses the RL VLC buffer for table 9 as scratch buffer for creating the bigger table 18. Afterwards the left part of the buffer for table 9 is used as scratch buffer to create table 9. This fixes the cfhd part of ticket #9399 (if it is not already fixed). Notice that I do not consider the previous stack usage excessive. Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 20:09:18 +02:00
tmp[j].len = table_vlc[i].len + 1;
tmp[j].run = table_vlc[i].run;
tmp[j].level = -table_vlc[i].level;
avcodec: Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Alpha requires addition of GBRAP12 pixel format.
2016-01-30 19:39:48 +02:00
}
}
avcodec/cfhddata: Reduce stack usage Creating CFHD RL VLC tables works by first extending the codes by the sign, followed by creating a VLC, followed by deriving the RL VLC from this VLC (which is then discarded). Extending the codes uses stack arrays. The tables used to initialize the VLC are already sorted from left-to-right in the tree. This means that the corresponding VLC entries are generally also ascending, but not always: Entries from subtables always follow the corresponding main table although it is possible for the right-most node to fit into the main table. This suggests that one can try to use the final destination buffer as scratch buffer for the tables with sign included. Unfortunately it works for neither of the tables if one uses the right-most part of the RL VLC buffer as scratch buffer; using the left-most part of the RL VLC buffer as scratch buffer might work if one traverses the VLC entries from end to start. But it works only for the little RL VLC (table 9), not for table 18. Therefore this patch uses the RL VLC buffer for table 9 as scratch buffer for creating the bigger table 18. Afterwards the left part of the buffer for table 9 is used as scratch buffer to create table 9. This fixes the cfhd part of ticket #9399 (if it is not already fixed). Notice that I do not consider the previous stack usage excessive. Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 20:09:18 +02:00
ret = ff_init_vlc_from_lengths(&vlc, VLC_BITS, j,
&tmp[0].len, sizeof(tmp[0]),
NULL, 0, 0, 0, 0, logctx);
avcodec: Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Alpha requires addition of GBRAP12 pixel format.
2016-01-30 19:39:48 +02:00
if (ret < 0)
return ret;
avcodec/cfhd, cfhddata: Free VLC as soon as it is not needed The VLC is only used to initialize RL VLC. Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 18:02:17 +02:00
av_assert0(vlc.table_size == out_size);
avcodec/cfhddata: Avoid code duplication when creating codebooks Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 17:56:48 +02:00
avcodec/cfhddata: Reduce stack usage Creating CFHD RL VLC tables works by first extending the codes by the sign, followed by creating a VLC, followed by deriving the RL VLC from this VLC (which is then discarded). Extending the codes uses stack arrays. The tables used to initialize the VLC are already sorted from left-to-right in the tree. This means that the corresponding VLC entries are generally also ascending, but not always: Entries from subtables always follow the corresponding main table although it is possible for the right-most node to fit into the main table. This suggests that one can try to use the final destination buffer as scratch buffer for the tables with sign included. Unfortunately it works for neither of the tables if one uses the right-most part of the RL VLC buffer as scratch buffer; using the left-most part of the RL VLC buffer as scratch buffer might work if one traverses the VLC entries from end to start. But it works only for the little RL VLC (table 9), not for table 18. Therefore this patch uses the RL VLC buffer for table 9 as scratch buffer for creating the bigger table 18. Afterwards the left part of the buffer for table 9 is used as scratch buffer to create table 9. This fixes the cfhd part of ticket #9399 (if it is not already fixed). Notice that I do not consider the previous stack usage excessive. Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 20:09:18 +02:00
for (unsigned i = out_size; i-- > 0;) {
avcodec/cfhd, cfhddata: Free VLC as soon as it is not needed The VLC is only used to initialize RL VLC. Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 18:02:17 +02:00
int code = vlc.table[i].sym;
int len = vlc.table[i].len;
avcodec: Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Alpha requires addition of GBRAP12 pixel format.
2016-01-30 19:39:48 +02:00
int level, run;
if (len < 0) { // more bits needed
run = 0;
level = code;
} else {
avcodec/cfhddata: Reduce stack usage Creating CFHD RL VLC tables works by first extending the codes by the sign, followed by creating a VLC, followed by deriving the RL VLC from this VLC (which is then discarded). Extending the codes uses stack arrays. The tables used to initialize the VLC are already sorted from left-to-right in the tree. This means that the corresponding VLC entries are generally also ascending, but not always: Entries from subtables always follow the corresponding main table although it is possible for the right-most node to fit into the main table. This suggests that one can try to use the final destination buffer as scratch buffer for the tables with sign included. Unfortunately it works for neither of the tables if one uses the right-most part of the RL VLC buffer as scratch buffer; using the left-most part of the RL VLC buffer as scratch buffer might work if one traverses the VLC entries from end to start. But it works only for the little RL VLC (table 9), not for table 18. Therefore this patch uses the RL VLC buffer for table 9 as scratch buffer for creating the bigger table 18. Afterwards the left part of the buffer for table 9 is used as scratch buffer to create table 9. This fixes the cfhd part of ticket #9399 (if it is not already fixed). Notice that I do not consider the previous stack usage excessive. Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 20:09:18 +02:00
run = tmp[code].run;
level = tmp[code].level;
avcodec: Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Alpha requires addition of GBRAP12 pixel format.
2016-01-30 19:39:48 +02:00
}
avcodec/cfhddata: Avoid code duplication when creating codebooks Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 17:56:48 +02:00
out[i].len = len;
out[i].level = level;
out[i].run = run;
avcodec: Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Alpha requires addition of GBRAP12 pixel format.
2016-01-30 19:39:48 +02:00
}
avcodec/cfhd, cfhddata: Free VLC as soon as it is not needed The VLC is only used to initialize RL VLC. Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 18:02:17 +02:00
ff_free_vlc(&vlc);
avcodec: Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Alpha requires addition of GBRAP12 pixel format.
2016-01-30 19:39:48 +02:00
avcodec/cfhddata: Avoid code duplication when creating codebooks Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 17:56:48 +02:00
return 0;
}
avcodec: Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Alpha requires addition of GBRAP12 pixel format.
2016-01-30 19:39:48 +02:00
avcodec/cfhddata: Avoid code duplication when creating codebooks Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 17:56:48 +02:00
av_cold int ff_cfhd_init_vlcs(CFHDContext *s)
{
int ret;
avcodec: Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Alpha requires addition of GBRAP12 pixel format.
2016-01-30 19:39:48 +02:00
avcodec/cfhddata: Reduce stack usage Creating CFHD RL VLC tables works by first extending the codes by the sign, followed by creating a VLC, followed by deriving the RL VLC from this VLC (which is then discarded). Extending the codes uses stack arrays. The tables used to initialize the VLC are already sorted from left-to-right in the tree. This means that the corresponding VLC entries are generally also ascending, but not always: Entries from subtables always follow the corresponding main table although it is possible for the right-most node to fit into the main table. This suggests that one can try to use the final destination buffer as scratch buffer for the tables with sign included. Unfortunately it works for neither of the tables if one uses the right-most part of the RL VLC buffer as scratch buffer; using the left-most part of the RL VLC buffer as scratch buffer might work if one traverses the VLC entries from end to start. But it works only for the little RL VLC (table 9), not for table 18. Therefore this patch uses the RL VLC buffer for table 9 as scratch buffer for creating the bigger table 18. Afterwards the left part of the buffer for table 9 is used as scratch buffer to create table 9. This fixes the cfhd part of ticket #9399 (if it is not already fixed). Notice that I do not consider the previous stack usage excessive. Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 20:09:18 +02:00
/* Table 18 - we reuse the unused table_9_rl_vlc as scratch buffer here */
avcodec/cfhddata: Avoid code duplication when creating codebooks Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 17:56:48 +02:00
ret = cfhd_init_vlc(s->table_18_rl_vlc, FF_ARRAY_ELEMS(s->table_18_rl_vlc),
table_18_vlc, FF_ARRAY_ELEMS(table_18_vlc),
avcodec/cfhddata: Reduce stack usage Creating CFHD RL VLC tables works by first extending the codes by the sign, followed by creating a VLC, followed by deriving the RL VLC from this VLC (which is then discarded). Extending the codes uses stack arrays. The tables used to initialize the VLC are already sorted from left-to-right in the tree. This means that the corresponding VLC entries are generally also ascending, but not always: Entries from subtables always follow the corresponding main table although it is possible for the right-most node to fit into the main table. This suggests that one can try to use the final destination buffer as scratch buffer for the tables with sign included. Unfortunately it works for neither of the tables if one uses the right-most part of the RL VLC buffer as scratch buffer; using the left-most part of the RL VLC buffer as scratch buffer might work if one traverses the VLC entries from end to start. But it works only for the little RL VLC (table 9), not for table 18. Therefore this patch uses the RL VLC buffer for table 9 as scratch buffer for creating the bigger table 18. Afterwards the left part of the buffer for table 9 is used as scratch buffer to create table 9. This fixes the cfhd part of ticket #9399 (if it is not already fixed). Notice that I do not consider the previous stack usage excessive. Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 20:09:18 +02:00
s->table_9_rl_vlc, s->avctx);
if (ret < 0)
return ret;
/* Table 9 - table_9_rl_vlc itself is used as scratch buffer; it works
* because we are counting down in the final loop */
ret = cfhd_init_vlc(s->table_9_rl_vlc, FF_ARRAY_ELEMS(s->table_9_rl_vlc),
table_9_vlc, FF_ARRAY_ELEMS(table_9_vlc),
s->table_9_rl_vlc, s->avctx);
avcodec/cfhddata: Avoid code duplication when creating codebooks Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-09-03 17:56:48 +02:00
if (ret < 0)
return ret;
return 0;
avcodec: Cineform HD Decoder Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Alpha requires addition of GBRAP12 pixel format.
2016-01-30 19:39:48 +02:00
}
Reference in New Issue Copy Permalink