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https://github.com/xenia-project/FFmpeg.git
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avcodec: add YUY2 Lossless Codec decoder
Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol
parent
074fdf4d12
commit
8fb92ea7e2
@ -2,6 +2,10 @@ Entries are sorted chronologically from oldest to youngest within each release,
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releases are sorted from youngest to oldest.
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version <next>:
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- YUY2 Lossless Codec decoder
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version 3.1:
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- DXVA2-accelerated HEVC Main10 decoding
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- fieldhint filter
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- loop video filter and aloop audio filter
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@ -633,6 +633,7 @@ OBJS-$(CONFIG_XWD_DECODER) += xwddec.o
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OBJS-$(CONFIG_XWD_ENCODER) += xwdenc.o
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OBJS-$(CONFIG_Y41P_DECODER) += y41pdec.o
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OBJS-$(CONFIG_Y41P_ENCODER) += y41penc.o
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OBJS-$(CONFIG_YLC_DECODER) += ylc.o
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OBJS-$(CONFIG_YOP_DECODER) += yop.o
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OBJS-$(CONFIG_YUV4_DECODER) += yuv4dec.o
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OBJS-$(CONFIG_YUV4_ENCODER) += yuv4enc.o
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@ -370,6 +370,7 @@ void avcodec_register_all(void)
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REGISTER_DECODER(XL, xl);
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REGISTER_ENCDEC (XWD, xwd);
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REGISTER_ENCDEC (Y41P, y41p);
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REGISTER_DECODER(YLC, ylc);
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REGISTER_DECODER(YOP, yop);
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REGISTER_ENCDEC (YUV4, yuv4);
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REGISTER_DECODER(ZERO12V, zero12v);
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@ -408,6 +408,7 @@ enum AVCodecID {
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AV_CODEC_ID_M101,
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AV_CODEC_ID_MAGICYUV,
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AV_CODEC_ID_SHEERVIDEO,
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AV_CODEC_ID_YLC,
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/* various PCM "codecs" */
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AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
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@ -1556,6 +1556,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
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.long_name = NULL_IF_CONFIG_SMALL("BitJazz SheerVideo"),
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.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSLESS,
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},
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{
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.id = AV_CODEC_ID_YLC,
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.type = AVMEDIA_TYPE_VIDEO,
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.name = "ylc",
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.long_name = NULL_IF_CONFIG_SMALL("YUY2 Lossless Codec"),
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.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSLESS,
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},
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/* various PCM "codecs" */
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{
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@ -28,7 +28,7 @@
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#include "libavutil/version.h"
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#define LIBAVCODEC_VERSION_MAJOR 57
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#define LIBAVCODEC_VERSION_MINOR 47
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#define LIBAVCODEC_VERSION_MINOR 48
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#define LIBAVCODEC_VERSION_MICRO 100
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#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
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472
libavcodec/ylc.c
Normal file
472
libavcodec/ylc.c
Normal file
@ -0,0 +1,472 @@
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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 "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) & ((1 << 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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int 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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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;
|
||||
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_get_buffer(avctx, p, 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]);
|
||||
|
||||
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,
|
||||
};
|
||||
@ -424,6 +424,7 @@ const AVCodecTag ff_codec_bmp_tags[] = {
|
||||
{ AV_CODEC_ID_M101, MKTAG('M', '1', '0', '1') },
|
||||
{ AV_CODEC_ID_M101, MKTAG('M', '1', '0', '2') },
|
||||
{ AV_CODEC_ID_MAGICYUV, MKTAG('M', 'A', 'G', 'Y') },
|
||||
{ AV_CODEC_ID_YLC, MKTAG('Y', 'L', 'C', '0') },
|
||||
|
||||
{ AV_CODEC_ID_NONE, 0 }
|
||||
};
|
||||
|
||||
Loading…
Reference in New Issue
Block a user