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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, |
158 |
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0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, |
159 |
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0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, |
160 |
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0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, |
161 |
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0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, |
162 |
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
163 |
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
164 |
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
165 |
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
166 |
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
167 |
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0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
168 |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
169 |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
170 |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
171 |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
172 |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, |
173 |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
174 |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
175 |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
176 |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
177 |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
178 |
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0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02, |
179 |
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0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, |
180 |
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0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, |
181 |
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0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, |
182 |
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0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, |
183 |
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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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187 |
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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, |
190 |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
191 |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, |
192 |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
193 |
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0x01, 0x01, 0x01, 0x01, 0x01, 0xFF, 0xFF, 0xFF, |
194 |
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
195 |
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0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, |
196 |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
197 |
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0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, |
198 |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
199 |
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0x01, 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
200 |
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
201 |
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0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
202 |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
203 |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
204 |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0xFF, |
205 |
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
206 |
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, |
207 |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
208 |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, |
209 |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
210 |
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0x01, 0x01, 0x01, 0x01, 0xFF, 0xFF, 0xFF, 0xFF, |
211 |
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
212 |
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0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, |
213 |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
214 |
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0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
215 |
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
216 |
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0x01, 0x00, |
217 |
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}; |
218 |
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219 |
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static const uint8_t table_y2[] = { |
220 |
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0xFC, 0xFC, 0xFC, 0xFD, 0xFD, 0xFD, 0xFE, 0xFE, |
221 |
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0xFE, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0xFC, |
222 |
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0xFC, 0xFC, 0xFD, 0xFD, 0xFD, 0xFE, 0xFE, 0xFE, |
223 |
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0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0xFC, 0xFC, |
224 |
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0xFC, 0xFD, 0xFD, 0xFD, 0xFE, 0xFE, 0xFE, 0xFF, |
225 |
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0xFF, 0xFF, 0x00, 0x00, 0x00, 0xFD, 0xFD, 0xFD, |
226 |
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0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0x00, 0x00, |
227 |
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0x00, 0x01, 0x01, 0x01, 0xFD, 0xFD, 0xFD, 0xFE, |
228 |
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0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, |
229 |
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0x01, 0x01, 0x01, 0xFD, 0xFD, 0xFD, 0xFE, 0xFE, |
230 |
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0xFE, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x01, |
231 |
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0x01, 0x01, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, |
232 |
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0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x02, 0x02, |
233 |
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0x02, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0x00, |
234 |
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0x00, 0x00, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, |
235 |
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0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0x00, 0x00, |
236 |
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0x00, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0xFF, |
237 |
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0xFF, 0xFF, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, |
238 |
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0x02, 0x02, 0x02, 0x03, 0x03, 0x03, 0xFF, 0xFF, |
239 |
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0xFF, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x02, |
240 |
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0x02, 0x02, 0x03, 0x03, 0x03, 0xFF, 0xFF, 0xFF, |
241 |
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0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x02, 0x02, |
242 |
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0x02, 0x03, 0x03, 0x03, 0x00, 0x00, 0x00, 0x01, |
243 |
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0x01, 0x01, 0x02, 0x02, 0x02, 0x03, 0x03, 0x03, |
244 |
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0x04, 0x04, 0x04, 0x00, 0x00, 0x00, 0x01, 0x01, |
245 |
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0x01, 0x02, 0x02, 0x02, 0x03, 0x03, 0x03, 0x04, |
246 |
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0x04, 0x04, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, |
247 |
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0x02, 0x02, 0x02, 0x03, 0x03, 0x03, 0x04, 0x04, |
248 |
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0x04, 0x00, |
249 |
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}; |
250 |
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251 |
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static const uint8_t table_v[] = { |
252 |
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0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, |
253 |
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0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, |
254 |
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0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, |
255 |
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0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, |
256 |
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0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, |
257 |
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0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, |
258 |
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0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, |
259 |
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0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, |
260 |
|
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0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, |
261 |
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0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, |
262 |
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0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, |
263 |
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0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, |
264 |
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0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, |
265 |
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0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, |
266 |
|
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0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, |
267 |
|
|
0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, |
268 |
|
|
0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, |
269 |
|
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0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, |
270 |
|
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0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, |
271 |
|
|
0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, |
272 |
|
|
0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, |
273 |
|
|
0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, |
274 |
|
|
0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, |
275 |
|
|
0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, |
276 |
|
|
0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, |
277 |
|
|
0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, |
278 |
|
|
0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, |
279 |
|
|
0xFF, 0x00, 0x01, 0xFF, 0x00, 0x01, 0xFF, 0x00, |
280 |
|
|
0x01, 0x00, |
281 |
|
|
}; |
282 |
|
|
|
283 |
|
|
static int decode_frame(AVCodecContext *avctx, |
284 |
|
|
void *data, int *got_frame, |
285 |
|
|
AVPacket *avpkt) |
286 |
|
|
{ |
287 |
|
|
int TL[4] = { 128, 128, 128, 128 }; |
288 |
|
|
int L[4] = { 128, 128, 128, 128 }; |
289 |
|
|
YLCContext *s = avctx->priv_data; |
290 |
|
|
ThreadFrame frame = { .f = data }; |
291 |
|
|
const uint8_t *buf = avpkt->data; |
292 |
|
|
int ret, x, y, toffset, boffset; |
293 |
|
|
AVFrame * const p = data; |
294 |
|
|
GetBitContext gb; |
295 |
|
|
uint8_t *dst; |
296 |
|
|
|
297 |
|
|
if (avpkt->size <= 16) |
298 |
|
|
return AVERROR_INVALIDDATA; |
299 |
|
|
|
300 |
|
|
if (AV_RL32(buf) != MKTAG('Y', 'L', 'C', '0') || |
301 |
|
|
AV_RL32(buf + 4) != 0) |
302 |
|
|
return AVERROR_INVALIDDATA; |
303 |
|
|
|
304 |
|
|
toffset = AV_RL32(buf + 8); |
305 |
|
|
if (toffset < 16 || toffset >= avpkt->size) |
306 |
|
|
return AVERROR_INVALIDDATA; |
307 |
|
|
|
308 |
|
|
boffset = AV_RL32(buf + 12); |
309 |
|
|
if (toffset >= boffset || boffset >= avpkt->size) |
310 |
|
|
return AVERROR_INVALIDDATA; |
311 |
|
|
|
312 |
|
|
if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) |
313 |
|
|
return ret; |
314 |
|
|
|
315 |
|
|
av_fast_malloc(&s->table_bits, &s->table_bits_size, |
316 |
|
|
boffset - toffset + AV_INPUT_BUFFER_PADDING_SIZE); |
317 |
|
|
if (!s->table_bits) |
318 |
|
|
return AVERROR(ENOMEM); |
319 |
|
|
|
320 |
|
|
memcpy(s->table_bits, avpkt->data + toffset, boffset - toffset); |
321 |
|
|
memset(s->table_bits + boffset - toffset, 0, AV_INPUT_BUFFER_PADDING_SIZE); |
322 |
|
|
s->bdsp.bswap_buf((uint32_t *) s->table_bits, |
323 |
|
|
(uint32_t *) s->table_bits, |
324 |
|
|
(boffset - toffset + 3) >> 2); |
325 |
|
|
if ((ret = init_get_bits8(&gb, s->table_bits, boffset - toffset)) < 0) |
326 |
|
|
return ret; |
327 |
|
|
|
328 |
|
|
for (x = 0; x < 1024; x++) { |
329 |
|
|
unsigned len = get_unary(&gb, 1, 31); |
330 |
|
|
uint32_t val = ((1U << len) - 1) + get_bits_long(&gb, len); |
331 |
|
|
|
332 |
|
|
s->table[x] = val; |
333 |
|
|
} |
334 |
|
|
|
335 |
|
|
ret = build_vlc(avctx, &s->vlc[0], &s->table[0 ]); |
336 |
|
|
if (ret < 0) |
337 |
|
|
return ret; |
338 |
|
|
ret = build_vlc(avctx, &s->vlc[1], &s->table[256]); |
339 |
|
|
if (ret < 0) |
340 |
|
|
return ret; |
341 |
|
|
ret = build_vlc(avctx, &s->vlc[2], &s->table[512]); |
342 |
|
|
if (ret < 0) |
343 |
|
|
return ret; |
344 |
|
|
ret = build_vlc(avctx, &s->vlc[3], &s->table[768]); |
345 |
|
|
if (ret < 0) |
346 |
|
|
return ret; |
347 |
|
|
|
348 |
|
|
av_fast_malloc(&s->bitstream_bits, &s->bitstream_bits_size, |
349 |
|
|
avpkt->size - boffset + AV_INPUT_BUFFER_PADDING_SIZE); |
350 |
|
|
if (!s->bitstream_bits) |
351 |
|
|
return AVERROR(ENOMEM); |
352 |
|
|
|
353 |
|
|
memcpy(s->bitstream_bits, avpkt->data + boffset, avpkt->size - boffset); |
354 |
|
|
memset(s->bitstream_bits + avpkt->size - boffset, 0, AV_INPUT_BUFFER_PADDING_SIZE); |
355 |
|
|
s->bdsp.bswap_buf((uint32_t *) s->bitstream_bits, |
356 |
|
|
(uint32_t *) s->bitstream_bits, |
357 |
|
|
(avpkt->size - boffset) >> 2); |
358 |
|
|
if ((ret = init_get_bits8(&gb, s->bitstream_bits, avpkt->size - boffset)) < 0) |
359 |
|
|
return ret; |
360 |
|
|
|
361 |
|
|
dst = p->data[0]; |
362 |
|
|
for (y = 0; y < avctx->height; y++) { |
363 |
|
|
memset(dst, 0, avctx->width * 2); |
364 |
|
|
dst += p->linesize[0]; |
365 |
|
|
} |
366 |
|
|
|
367 |
|
|
dst = p->data[0]; |
368 |
|
|
for (y = 0; y < avctx->height; y++) { |
369 |
|
|
for (x = 0; x < avctx->width * 2 && y < avctx->height;) { |
370 |
|
|
if (get_bits_left(&gb) <= 0) |
371 |
|
|
return AVERROR_INVALIDDATA; |
372 |
|
|
|
373 |
|
|
if (get_bits1(&gb)) { |
374 |
|
|
int val = get_vlc2(&gb, s->vlc[0].table, s->vlc[0].bits, 3); |
375 |
|
|
if (val < 0) { |
376 |
|
|
return AVERROR_INVALIDDATA; |
377 |
|
|
} else if (val < 0xE1) { |
378 |
|
|
dst[x ] = table_y1[val]; |
379 |
|
|
dst[x + 1] = table_u[val]; |
380 |
|
|
dst[x + 2] = table_y2[val]; |
381 |
|
|
dst[x + 3] = table_v[val]; |
382 |
|
|
x += 4; |
383 |
|
|
} else { |
384 |
|
|
int incr = (val - 0xDF) * 4; |
385 |
|
|
if (x + incr >= avctx->width * 2) { |
386 |
|
|
int iy = ((x + incr) / (avctx->width * 2)); |
387 |
|
|
x = (x + incr) % (avctx->width * 2); |
388 |
|
|
y += iy; |
389 |
|
|
dst += iy * p->linesize[0]; |
390 |
|
|
} else { |
391 |
|
|
x += incr; |
392 |
|
|
} |
393 |
|
|
} |
394 |
|
|
} else { |
395 |
|
|
int y1, y2, u, v; |
396 |
|
|
|
397 |
|
|
y1 = get_vlc2(&gb, s->vlc[1].table, s->vlc[1].bits, 3); |
398 |
|
|
u = get_vlc2(&gb, s->vlc[2].table, s->vlc[2].bits, 3); |
399 |
|
|
y2 = get_vlc2(&gb, s->vlc[1].table, s->vlc[1].bits, 3); |
400 |
|
|
v = get_vlc2(&gb, s->vlc[3].table, s->vlc[3].bits, 3); |
401 |
|
|
if (y1 < 0 || y2 < 0 || u < 0 || v < 0) |
402 |
|
|
return AVERROR_INVALIDDATA; |
403 |
|
|
dst[x ] = y1; |
404 |
|
|
dst[x + 1] = u; |
405 |
|
|
dst[x + 2] = y1 + y2; |
406 |
|
|
dst[x + 3] = v; |
407 |
|
|
x += 4; |
408 |
|
|
} |
409 |
|
|
} |
410 |
|
|
dst += p->linesize[0]; |
411 |
|
|
} |
412 |
|
|
|
413 |
|
|
dst = p->data[0]; |
414 |
|
|
for (x = 0; x < avctx->width * 2; x += 4) { |
415 |
|
|
dst[x ] = dst[x ] + L[0]; |
416 |
|
|
dst[x + 2] = L[0] = dst[x + 2] + L[0]; |
417 |
|
|
L[1] = dst[x + 1] + L[1]; |
418 |
|
|
dst[x + 1] = L[1]; |
419 |
|
|
L[2] = dst[x + 3] + L[2]; |
420 |
|
|
dst[x + 3] = L[2]; |
421 |
|
|
} |
422 |
|
|
dst += p->linesize[0]; |
423 |
|
|
|
424 |
|
|
for (y = 1; y < avctx->height; y++) { |
425 |
|
|
x = 0; |
426 |
|
|
dst[x ] = dst[x ] + L[0] + dst[x + 0 - p->linesize[0]] - TL[0]; |
427 |
|
|
dst[x + 2] = L[0] = dst[x + 2] + L[0] + dst[x + 2 - p->linesize[0]] - TL[0]; |
428 |
|
|
TL[0] = dst[x + 2 - p->linesize[0]]; |
429 |
|
|
L[1] = dst[x + 1] + L[1] + dst[x + 1 - p->linesize[0]] - TL[1]; |
430 |
|
|
dst[x + 1] = L[1]; |
431 |
|
|
TL[1] = dst[x + 1 - p->linesize[0]]; |
432 |
|
|
L[2] = dst[x + 3] + L[2] + dst[x + 3 - p->linesize[0]] - TL[2]; |
433 |
|
|
dst[x + 3] = L[2]; |
434 |
|
|
TL[2] = dst[x + 3 - p->linesize[0]]; |
435 |
|
|
for (x = 4; x < avctx->width * 2; x += 4) { |
436 |
|
|
dst[x ] = dst[x ] + L[0] + dst[x + 0 - p->linesize[0]] - TL[0]; |
437 |
|
|
dst[x + 2] = L[0] = dst[x + 2] + L[0] + dst[x + 2 - p->linesize[0]] - TL[0]; |
438 |
|
|
TL[0] = dst[x + 2 - p->linesize[0]]; |
439 |
|
|
L[1] = dst[x + 1] + L[1] + dst[x + 1 - p->linesize[0]] - TL[1]; |
440 |
|
|
dst[x + 1] = L[1]; |
441 |
|
|
TL[1] = dst[x + 1 - p->linesize[0]]; |
442 |
|
|
L[2] = dst[x + 3] + L[2] + dst[x + 3 - p->linesize[0]] - TL[2]; |
443 |
|
|
dst[x + 3] = L[2]; |
444 |
|
|
TL[2] = dst[x + 3 - p->linesize[0]]; |
445 |
|
|
} |
446 |
|
|
dst += p->linesize[0]; |
447 |
|
|
} |
448 |
|
|
|
449 |
|
|
p->pict_type = AV_PICTURE_TYPE_I; |
450 |
|
|
p->key_frame = 1; |
451 |
|
|
*got_frame = 1; |
452 |
|
|
|
453 |
|
|
return avpkt->size; |
454 |
|
|
} |
455 |
|
|
|
456 |
|
|
static av_cold int decode_end(AVCodecContext *avctx) |
457 |
|
|
{ |
458 |
|
|
YLCContext *s = avctx->priv_data; |
459 |
|
|
|
460 |
|
|
ff_free_vlc(&s->vlc[0]); |
461 |
|
|
ff_free_vlc(&s->vlc[1]); |
462 |
|
|
ff_free_vlc(&s->vlc[2]); |
463 |
|
|
ff_free_vlc(&s->vlc[3]); |
464 |
|
|
av_freep(&s->table_bits); |
465 |
|
|
s->table_bits_size = 0; |
466 |
|
|
av_freep(&s->bitstream_bits); |
467 |
|
|
s->bitstream_bits_size = 0; |
468 |
|
|
|
469 |
|
|
return 0; |
470 |
|
|
} |
471 |
|
|
|
472 |
|
|
AVCodec ff_ylc_decoder = { |
473 |
|
|
.name = "ylc", |
474 |
|
|
.long_name = NULL_IF_CONFIG_SMALL("YUY2 Lossless Codec"), |
475 |
|
|
.type = AVMEDIA_TYPE_VIDEO, |
476 |
|
|
.id = AV_CODEC_ID_YLC, |
477 |
|
|
.priv_data_size = sizeof(YLCContext), |
478 |
|
|
.init = decode_init, |
479 |
|
|
.close = decode_end, |
480 |
|
|
.decode = decode_frame, |
481 |
|
|
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS, |
482 |
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, |
483 |
|
|
}; |