mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
197 lines
6.4 KiB
C
197 lines
6.4 KiB
C
/*
|
|
* 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 "avcodec.h"
|
|
#include "dv.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;
|
|
}
|
|
}
|
|
}
|
|
|
|
int ff_dv_init_dynamic_tables(DVVideoContext *ctx, 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, &ctx->work_chunks[i].mb_coordinates[0]);
|
|
ctx->work_chunks[i++].buf_offset = p;
|
|
}
|
|
p += 5;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
av_cold int ff_dvvideo_init(AVCodecContext *avctx)
|
|
{
|
|
DVVideoContext *s = avctx->priv_data;
|
|
|
|
s->avctx = avctx;
|
|
avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT;
|
|
|
|
return 0;
|
|
}
|