484 lines
17 KiB
C
484 lines
17 KiB
C
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/*
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* YUY2 Lossless Codec
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "libavutil/imgutils.h"
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#include "libavutil/internal.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/mem.h"
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#include "avcodec.h"
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#include "bswapdsp.h"
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#include "get_bits.h"
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#include "huffyuvdsp.h"
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#include "internal.h"
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#include "thread.h"
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#include "unary.h"
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typedef struct YLCContext {
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VLC vlc[4];
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uint32_t table[1024];
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uint8_t *table_bits;
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uint8_t *bitstream_bits;
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int table_bits_size;
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int bitstream_bits_size;
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BswapDSPContext bdsp;
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} YLCContext;
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static av_cold int decode_init(AVCodecContext *avctx)
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{
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YLCContext *s = avctx->priv_data;
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avctx->pix_fmt = AV_PIX_FMT_YUYV422;
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ff_bswapdsp_init(&s->bdsp);
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return 0;
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}
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typedef struct Node {
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int16_t sym;
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int16_t n0;
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uint32_t count;
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int16_t l, r;
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} Node;
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static void get_tree_codes(uint32_t *bits, int16_t *lens, uint8_t *xlat,
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Node *nodes, int node,
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uint32_t pfx, int pl, int *pos)
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{
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int s;
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s = nodes[node].sym;
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if (s != -1) {
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bits[*pos] = (~pfx) & ((1ULL << FFMAX(pl, 1)) - 1);
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lens[*pos] = FFMAX(pl, 1);
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xlat[*pos] = s + (pl == 0);
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(*pos)++;
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} else {
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pfx <<= 1;
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pl++;
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get_tree_codes(bits, lens, xlat, nodes, nodes[node].l, pfx, pl,
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pos);
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pfx |= 1;
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get_tree_codes(bits, lens, xlat, nodes, nodes[node].r, pfx, pl,
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pos);
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}
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}
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static int build_vlc(AVCodecContext *avctx, VLC *vlc, const uint32_t *table)
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{
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Node nodes[512];
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uint32_t bits[256];
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int16_t lens[256];
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uint8_t xlat[256];
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int cur_node, i, j, pos = 0;
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ff_free_vlc(vlc);
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for (i = 0; i < 256; i++) {
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nodes[i].count = table[i];
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nodes[i].sym = i;
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nodes[i].n0 = -2;
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nodes[i].l = i;
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nodes[i].r = i;
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}
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cur_node = 256;
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j = 0;
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do {
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for (i = 0; ; i++) {
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int new_node = j;
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int first_node = cur_node;
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int second_node = cur_node;
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unsigned nd, st;
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nodes[cur_node].count = -1;
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do {
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int val = nodes[new_node].count;
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if (val && (val < nodes[first_node].count)) {
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if (val >= nodes[second_node].count) {
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first_node = new_node;
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} else {
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first_node = second_node;
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second_node = new_node;
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}
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}
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new_node += 1;
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} while (new_node != cur_node);
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if (first_node == cur_node)
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break;
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nd = nodes[second_node].count;
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st = nodes[first_node].count;
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nodes[second_node].count = 0;
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nodes[first_node].count = 0;
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if (nd >= UINT32_MAX - st) {
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av_log(avctx, AV_LOG_ERROR, "count overflow\n");
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return AVERROR_INVALIDDATA;
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}
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nodes[cur_node].count = nd + st;
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nodes[cur_node].sym = -1;
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nodes[cur_node].n0 = cur_node;
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nodes[cur_node].l = first_node;
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nodes[cur_node].r = second_node;
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cur_node++;
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}
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j++;
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} while (cur_node - 256 == j);
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get_tree_codes(bits, lens, xlat, nodes, cur_node - 1, 0, 0, &pos);
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return ff_init_vlc_sparse(vlc, 10, pos, lens, 2, 2, bits, 4, 4, xlat, 1, 1, 0);
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}
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static const uint8_t table_y1[] = {
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0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
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0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
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0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
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0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
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0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
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0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
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0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02,
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0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
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0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
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0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
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0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
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0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
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0x02, 0x00,
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};
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static const uint8_t table_u[] = {
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01,
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
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0x01, 0x01, 0x01, 0x01, 0x01, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01,
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
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0x01, 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01,
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
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0x01, 0x01, 0x01, 0x01, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
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0x01, 0x00,
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};
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static const uint8_t table_y2[] = {
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0xFC, 0xFC, 0xFC, 0xFD, 0xFD, 0xFD, 0xFE, 0xFE,
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0xFE, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0xFC,
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0xFC, 0xFC, 0xFD, 0xFD, 0xFD, 0xFE, 0xFE, 0xFE,
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0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0xFC, 0xFC,
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0xFC, 0xFD, 0xFD, 0xFD, 0xFE, 0xFE, 0xFE, 0xFF,
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0xFF, 0xFF, 0x00, 0x00, 0x00, 0xFD, 0xFD, 0xFD,
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0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0x00, 0x00,
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0x00, 0x01, 0x01, 0x01, 0xFD, 0xFD, 0xFD, 0xFE,
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0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00,
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0x01, 0x01, 0x01, 0xFD, 0xFD, 0xFD, 0xFE, 0xFE,
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0xFE, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x01,
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0x01, 0x01, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF,
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0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x02, 0x02,
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0x02, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0x00,
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0x00, 0x00, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02,
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0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0x00, 0x00,
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0x00, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0xFF,
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0xFF, 0xFF, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01,
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0x02, 0x02, 0x02, 0x03, 0x03, 0x03, 0xFF, 0xFF,
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0xFF, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x02,
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0x02, 0x02, 0x03, 0x03, 0x03, 0xFF, 0xFF, 0xFF,
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0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x02, 0x02,
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0x02, 0x03, 0x03, 0x03, 0x00, 0x00, 0x00, 0x01,
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0x01, 0x01, 0x02, 0x02, 0x02, 0x03, 0x03, 0x03,
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0x04, 0x04, 0x04, 0x00, 0x00, 0x00, 0x01, 0x01,
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0x01, 0x02, 0x02, 0x02, 0x03, 0x03, 0x03, 0x04,
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0x04, 0x04, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01,
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0x02, 0x02, 0x02, 0x03, 0x03, 0x03, 0x04, 0x04,
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0x04, 0x00,
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};
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static const uint8_t table_v[] = {
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0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
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0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF,
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0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01,
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0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
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0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF,
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0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01,
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0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
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0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF,
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0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01,
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0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
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0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF,
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0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01,
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0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
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0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF,
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0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01,
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0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
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0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF,
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0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01,
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0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
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0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF,
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|
|
0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01,
|
||
|
|
0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
|
||
|
|
0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF,
|
||
|
|
0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01,
|
||
|
|
0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
|
||
|
|
0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF,
|
||
|
|
0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01,
|
||
|
|
0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00,
|
||
|
|
0x01, 0x00,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int decode_frame(AVCodecContext *avctx,
|
||
|
|
void *data, int *got_frame,
|
||
|
|
AVPacket *avpkt)
|
||
|
|
{
|
||
|
|
int TL[4] = { 128, 128, 128, 128 };
|
||
|
|
int L[4] = { 128, 128, 128, 128 };
|
||
|
|
YLCContext *s = avctx->priv_data;
|
||
|
|
ThreadFrame frame = { .f = data };
|
||
|
|
const uint8_t *buf = avpkt->data;
|
||
|
|
int ret, x, y, toffset, boffset;
|
||
|
|
AVFrame * const p = data;
|
||
|
|
GetBitContext gb;
|
||
|
|
uint8_t *dst;
|
||
|
|
|
||
|
|
if (avpkt->size <= 16)
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
|
||
|
|
if (AV_RL32(buf) != MKTAG('Y', 'L', 'C', '0') ||
|
||
|
|
AV_RL32(buf + 4) != 0)
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
|
||
|
|
toffset = AV_RL32(buf + 8);
|
||
|
|
if (toffset < 16 || toffset >= avpkt->size)
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
|
||
|
|
boffset = AV_RL32(buf + 12);
|
||
|
|
if (toffset >= boffset || boffset >= avpkt->size)
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
|
||
|
|
if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
av_fast_malloc(&s->table_bits, &s->table_bits_size,
|
||
|
|
boffset - toffset + AV_INPUT_BUFFER_PADDING_SIZE);
|
||
|
|
if (!s->table_bits)
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
|
||
|
|
memcpy(s->table_bits, avpkt->data + toffset, boffset - toffset);
|
||
|
|
memset(s->table_bits + boffset - toffset, 0, AV_INPUT_BUFFER_PADDING_SIZE);
|
||
|
|
s->bdsp.bswap_buf((uint32_t *) s->table_bits,
|
||
|
|
(uint32_t *) s->table_bits,
|
||
|
|
(boffset - toffset + 3) >> 2);
|
||
|
|
if ((ret = init_get_bits8(&gb, s->table_bits, boffset - toffset)) < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
for (x = 0; x < 1024; x++) {
|
||
|
|
unsigned len = get_unary(&gb, 1, 31);
|
||
|
|
uint32_t val = ((1U << len) - 1) + get_bits_long(&gb, len);
|
||
|
|
|
||
|
|
s->table[x] = val;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = build_vlc(avctx, &s->vlc[0], &s->table[0 ]);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
ret = build_vlc(avctx, &s->vlc[1], &s->table[256]);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
ret = build_vlc(avctx, &s->vlc[2], &s->table[512]);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
ret = build_vlc(avctx, &s->vlc[3], &s->table[768]);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
av_fast_malloc(&s->bitstream_bits, &s->bitstream_bits_size,
|
||
|
|
avpkt->size - boffset + AV_INPUT_BUFFER_PADDING_SIZE);
|
||
|
|
if (!s->bitstream_bits)
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
|
||
|
|
memcpy(s->bitstream_bits, avpkt->data + boffset, avpkt->size - boffset);
|
||
|
|
memset(s->bitstream_bits + avpkt->size - boffset, 0, AV_INPUT_BUFFER_PADDING_SIZE);
|
||
|
|
s->bdsp.bswap_buf((uint32_t *) s->bitstream_bits,
|
||
|
|
(uint32_t *) s->bitstream_bits,
|
||
|
|
(avpkt->size - boffset) >> 2);
|
||
|
|
if ((ret = init_get_bits8(&gb, s->bitstream_bits, avpkt->size - boffset)) < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
dst = p->data[0];
|
||
|
|
for (y = 0; y < avctx->height; y++) {
|
||
|
|
memset(dst, 0, avctx->width * 2);
|
||
|
|
dst += p->linesize[0];
|
||
|
|
}
|
||
|
|
|
||
|
|
dst = p->data[0];
|
||
|
|
for (y = 0; y < avctx->height; y++) {
|
||
|
|
for (x = 0; x < avctx->width * 2 && y < avctx->height;) {
|
||
|
|
if (get_bits_left(&gb) <= 0)
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
|
||
|
|
if (get_bits1(&gb)) {
|
||
|
|
int val = get_vlc2(&gb, s->vlc[0].table, s->vlc[0].bits, 3);
|
||
|
|
if (val < 0) {
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
} else if (val < 0xE1) {
|
||
|
|
dst[x ] = table_y1[val];
|
||
|
|
dst[x + 1] = table_u[val];
|
||
|
|
dst[x + 2] = table_y2[val];
|
||
|
|
dst[x + 3] = table_v[val];
|
||
|
|
x += 4;
|
||
|
|
} else {
|
||
|
|
int incr = (val - 0xDF) * 4;
|
||
|
|
if (x + incr >= avctx->width * 2) {
|
||
|
|
int iy = ((x + incr) / (avctx->width * 2));
|
||
|
|
x = (x + incr) % (avctx->width * 2);
|
||
|
|
y += iy;
|
||
|
|
dst += iy * p->linesize[0];
|
||
|
|
} else {
|
||
|
|
x += incr;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
int y1, y2, u, v;
|
||
|
|
|
||
|
|
y1 = get_vlc2(&gb, s->vlc[1].table, s->vlc[1].bits, 3);
|
||
|
|
u = get_vlc2(&gb, s->vlc[2].table, s->vlc[2].bits, 3);
|
||
|
|
y2 = get_vlc2(&gb, s->vlc[1].table, s->vlc[1].bits, 3);
|
||
|
|
v = get_vlc2(&gb, s->vlc[3].table, s->vlc[3].bits, 3);
|
||
|
|
if (y1 < 0 || y2 < 0 || u < 0 || v < 0)
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
dst[x ] = y1;
|
||
|
|
dst[x + 1] = u;
|
||
|
|
dst[x + 2] = y1 + y2;
|
||
|
|
dst[x + 3] = v;
|
||
|
|
x += 4;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
dst += p->linesize[0];
|
||
|
|
}
|
||
|
|
|
||
|
|
dst = p->data[0];
|
||
|
|
for (x = 0; x < avctx->width * 2; x += 4) {
|
||
|
|
dst[x ] = dst[x ] + L[0];
|
||
|
|
dst[x + 2] = L[0] = dst[x + 2] + L[0];
|
||
|
|
L[1] = dst[x + 1] + L[1];
|
||
|
|
dst[x + 1] = L[1];
|
||
|
|
L[2] = dst[x + 3] + L[2];
|
||
|
|
dst[x + 3] = L[2];
|
||
|
|
}
|
||
|
|
dst += p->linesize[0];
|
||
|
|
|
||
|
|
for (y = 1; y < avctx->height; y++) {
|
||
|
|
x = 0;
|
||
|
|
dst[x ] = dst[x ] + L[0] + dst[x + 0 - p->linesize[0]] - TL[0];
|
||
|
|
dst[x + 2] = L[0] = dst[x + 2] + L[0] + dst[x + 2 - p->linesize[0]] - TL[0];
|
||
|
|
TL[0] = dst[x + 2 - p->linesize[0]];
|
||
|
|
L[1] = dst[x + 1] + L[1] + dst[x + 1 - p->linesize[0]] - TL[1];
|
||
|
|
dst[x + 1] = L[1];
|
||
|
|
TL[1] = dst[x + 1 - p->linesize[0]];
|
||
|
|
L[2] = dst[x + 3] + L[2] + dst[x + 3 - p->linesize[0]] - TL[2];
|
||
|
|
dst[x + 3] = L[2];
|
||
|
|
TL[2] = dst[x + 3 - p->linesize[0]];
|
||
|
|
for (x = 4; x < avctx->width * 2; x += 4) {
|
||
|
|
dst[x ] = dst[x ] + L[0] + dst[x + 0 - p->linesize[0]] - TL[0];
|
||
|
|
dst[x + 2] = L[0] = dst[x + 2] + L[0] + dst[x + 2 - p->linesize[0]] - TL[0];
|
||
|
|
TL[0] = dst[x + 2 - p->linesize[0]];
|
||
|
|
L[1] = dst[x + 1] + L[1] + dst[x + 1 - p->linesize[0]] - TL[1];
|
||
|
|
dst[x + 1] = L[1];
|
||
|
|
TL[1] = dst[x + 1 - p->linesize[0]];
|
||
|
|
L[2] = dst[x + 3] + L[2] + dst[x + 3 - p->linesize[0]] - TL[2];
|
||
|
|
dst[x + 3] = L[2];
|
||
|
|
TL[2] = dst[x + 3 - p->linesize[0]];
|
||
|
|
}
|
||
|
|
dst += p->linesize[0];
|
||
|
|
}
|
||
|
|
|
||
|
|
p->pict_type = AV_PICTURE_TYPE_I;
|
||
|
|
p->key_frame = 1;
|
||
|
|
*got_frame = 1;
|
||
|
|
|
||
|
|
return avpkt->size;
|
||
|
|
}
|
||
|
|
|
||
|
|
static av_cold int decode_end(AVCodecContext *avctx)
|
||
|
|
{
|
||
|
|
YLCContext *s = avctx->priv_data;
|
||
|
|
|
||
|
|
ff_free_vlc(&s->vlc[0]);
|
||
|
|
ff_free_vlc(&s->vlc[1]);
|
||
|
|
ff_free_vlc(&s->vlc[2]);
|
||
|
|
ff_free_vlc(&s->vlc[3]);
|
||
|
|
av_freep(&s->table_bits);
|
||
|
|
s->table_bits_size = 0;
|
||
|
|
av_freep(&s->bitstream_bits);
|
||
|
|
s->bitstream_bits_size = 0;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
AVCodec ff_ylc_decoder = {
|
||
|
|
.name = "ylc",
|
||
|
|
.long_name = NULL_IF_CONFIG_SMALL("YUY2 Lossless Codec"),
|
||
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
||
|
|
.id = AV_CODEC_ID_YLC,
|
||
|
|
.priv_data_size = sizeof(YLCContext),
|
||
|
|
.init = decode_init,
|
||
|
|
.close = decode_end,
|
||
|
|
.decode = decode_frame,
|
||
|
|
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
|
||
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
|
||
|
|
};
|