mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
188 lines
6.2 KiB
188 lines
6.2 KiB
/* |
|
* DV decoder |
|
* Copyright (c) 2002 Fabrice Bellard |
|
* Copyright (c) 2004 Roman Shaposhnik |
|
* |
|
* DV encoder |
|
* Copyright (c) 2003 Roman Shaposhnik |
|
* |
|
* 50 Mbps (DVCPRO50) support |
|
* Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com> |
|
* |
|
* 100 Mbps (DVCPRO HD) support |
|
* Initial code by Daniel Maas <dmaas@maasdigital.com> (funded by BBC R&D) |
|
* Final code by Roman Shaposhnik |
|
* |
|
* Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth |
|
* of DV technical info. |
|
* |
|
* 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 |
|
*/ |
|
|
|
/** |
|
* @file |
|
* DV codec. |
|
*/ |
|
|
|
#include <stdint.h> |
|
|
|
#include "libavutil/pixfmt.h" |
|
|
|
#include "dv_internal.h" |
|
#include "dv_profile.h" |
|
|
|
static inline void dv_calc_mb_coordinates(const AVDVProfile *d, int chan, |
|
int seq, int slot, uint16_t *tbl) |
|
{ |
|
static const uint8_t off[] = { 2, 6, 8, 0, 4 }; |
|
static const uint8_t shuf1[] = { 36, 18, 54, 0, 72 }; |
|
static const uint8_t shuf2[] = { 24, 12, 36, 0, 48 }; |
|
static const uint8_t shuf3[] = { 18, 9, 27, 0, 36 }; |
|
|
|
static const uint8_t l_start[] = { 0, 4, 9, 13, 18, 22, 27, 31, 36, 40 }; |
|
static const uint8_t l_start_shuffled[] = { 9, 4, 13, 0, 18 }; |
|
|
|
static const uint8_t serpent1[] = { |
|
0, 1, 2, 2, 1, 0, |
|
0, 1, 2, 2, 1, 0, |
|
0, 1, 2, 2, 1, 0, |
|
0, 1, 2, 2, 1, 0, |
|
0, 1, 2 |
|
}; |
|
static const uint8_t serpent2[] = { |
|
0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0, |
|
0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0, |
|
0, 1, 2, 3, 4, 5 |
|
}; |
|
|
|
static const uint8_t remap[][2] = { |
|
{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, /* dummy */ |
|
{ 0, 0 }, { 0, 1 }, { 0, 2 }, { 0, 3 }, { 10, 0 }, |
|
{ 10, 1 }, { 10, 2 }, { 10, 3 }, { 20, 0 }, { 20, 1 }, |
|
{ 20, 2 }, { 20, 3 }, { 30, 0 }, { 30, 1 }, { 30, 2 }, |
|
{ 30, 3 }, { 40, 0 }, { 40, 1 }, { 40, 2 }, { 40, 3 }, |
|
{ 50, 0 }, { 50, 1 }, { 50, 2 }, { 50, 3 }, { 60, 0 }, |
|
{ 60, 1 }, { 60, 2 }, { 60, 3 }, { 70, 0 }, { 70, 1 }, |
|
{ 70, 2 }, { 70, 3 }, { 0, 64 }, { 0, 65 }, { 0, 66 }, |
|
{ 10, 64 }, { 10, 65 }, { 10, 66 }, { 20, 64 }, { 20, 65 }, |
|
{ 20, 66 }, { 30, 64 }, { 30, 65 }, { 30, 66 }, { 40, 64 }, |
|
{ 40, 65 }, { 40, 66 }, { 50, 64 }, { 50, 65 }, { 50, 66 }, |
|
{ 60, 64 }, { 60, 65 }, { 60, 66 }, { 70, 64 }, { 70, 65 }, |
|
{ 70, 66 }, { 0, 67 }, { 20, 67 }, { 40, 67 }, { 60, 67 } |
|
}; |
|
|
|
int i, k, m; |
|
int x, y, blk; |
|
|
|
for (m = 0; m < 5; m++) { |
|
switch (d->width) { |
|
case 1440: |
|
blk = (chan * 11 + seq) * 27 + slot; |
|
|
|
if (chan == 0 && seq == 11) { |
|
x = m * 27 + slot; |
|
if (x < 90) { |
|
y = 0; |
|
} else { |
|
x = (x - 90) * 2; |
|
y = 67; |
|
} |
|
} else { |
|
i = (4 * chan + blk + off[m]) % 11; |
|
k = (blk / 11) % 27; |
|
|
|
x = shuf1[m] + (chan & 1) * 9 + k % 9; |
|
y = (i * 3 + k / 9) * 2 + (chan >> 1) + 1; |
|
} |
|
tbl[m] = (x << 1) | (y << 9); |
|
break; |
|
case 1280: |
|
blk = (chan * 10 + seq) * 27 + slot; |
|
|
|
i = (4 * chan + (seq / 5) + 2 * blk + off[m]) % 10; |
|
k = (blk / 5) % 27; |
|
|
|
x = shuf1[m] + (chan & 1) * 9 + k % 9; |
|
y = (i * 3 + k / 9) * 2 + (chan >> 1) + 4; |
|
|
|
if (x >= 80) { |
|
x = remap[y][0] + ((x - 80) << (y > 59)); |
|
y = remap[y][1]; |
|
} |
|
tbl[m] = (x << 1) | (y << 9); |
|
break; |
|
case 960: |
|
blk = (chan * 10 + seq) * 27 + slot; |
|
|
|
i = (4 * chan + (seq / 5) + 2 * blk + off[m]) % 10; |
|
k = (blk / 5) % 27 + (i & 1) * 3; |
|
|
|
x = shuf2[m] + k % 6 + 6 * (chan & 1); |
|
y = l_start[i] + k / 6 + 45 * (chan >> 1); |
|
tbl[m] = (x << 1) | (y << 9); |
|
break; |
|
case 720: |
|
switch (d->pix_fmt) { |
|
case AV_PIX_FMT_YUV422P: |
|
x = shuf3[m] + slot / 3; |
|
y = serpent1[slot] + |
|
((((seq + off[m]) % d->difseg_size) << 1) + chan) * 3; |
|
tbl[m] = (x << 1) | (y << 8); |
|
break; |
|
case AV_PIX_FMT_YUV420P: |
|
x = shuf3[m] + slot / 3; |
|
y = serpent1[slot] + |
|
((seq + off[m]) % d->difseg_size) * 3; |
|
tbl[m] = (x << 1) | (y << 9); |
|
break; |
|
case AV_PIX_FMT_YUV411P: |
|
i = (seq + off[m]) % d->difseg_size; |
|
k = slot + ((m == 1 || m == 2) ? 3 : 0); |
|
|
|
x = l_start_shuffled[m] + k / 6; |
|
y = serpent2[k] + i * 6; |
|
if (x > 21) |
|
y = y * 2 - i * 6; |
|
tbl[m] = (x << 2) | (y << 8); |
|
break; |
|
} |
|
default: |
|
break; |
|
} |
|
} |
|
} |
|
|
|
void ff_dv_init_dynamic_tables(DVwork_chunk *work_chunks, const AVDVProfile *d) |
|
{ |
|
int j, i, c, s, p; |
|
|
|
p = i = 0; |
|
for (c = 0; c < d->n_difchan; c++) { |
|
for (s = 0; s < d->difseg_size; s++) { |
|
p += 6; |
|
for (j = 0; j < 27; j++) { |
|
p += !(j % 3); |
|
if (!(DV_PROFILE_IS_1080i50(d) && c != 0 && s == 11) && |
|
!(DV_PROFILE_IS_720p50(d) && s > 9)) { |
|
dv_calc_mb_coordinates(d, c, s, j, &work_chunks[i].mb_coordinates[0]); |
|
work_chunks[i++].buf_offset = p; |
|
} |
|
p += 5; |
|
} |
|
} |
|
} |
|
}
|
|
|