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FFmpeg/libavcodec/huffyuvdec.c
Andreas Rheinhardt a247ac640d avcodec: Constify AVCodecs 
Given that the AVCodec.next pointer has now been removed, most of the
AVCodecs are not modified at all any more and can therefore be made
const (as this patch does); the only exceptions are the very few codecs
for external libraries that have a init_static_data callback.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
2021-04-27 10:43:15 -03:00

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/*
* huffyuv decoder
*
* Copyright (c) 2002-2014 Michael Niedermayer <michaelni@gmx.at>
*
* see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of
* the algorithm used
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* yuva, gray, 4:4:4, 4:1:1, 4:1:0 and >8 bit per sample support sponsored by NOA
*/
/**
* @file
* huffyuv decoder
*/
#define UNCHECKED_BITSTREAM_READER 1
#include "avcodec.h"
#include "get_bits.h"
#include "huffyuv.h"
#include "huffyuvdsp.h"
#include "lossless_videodsp.h"
#include "thread.h"
#include "libavutil/imgutils.h"
#include "libavutil/pixdesc.h"
#define classic_shift_luma_table_size 42
static const unsigned char classic_shift_luma[classic_shift_luma_table_size + AV_INPUT_BUFFER_PADDING_SIZE] = {
34, 36, 35, 69, 135, 232, 9, 16, 10, 24, 11, 23, 12, 16, 13, 10,
14, 8, 15, 8, 16, 8, 17, 20, 16, 10, 207, 206, 205, 236, 11, 8,
10, 21, 9, 23, 8, 8, 199, 70, 69, 68, 0,
0,0,0,0,0,0,0,0,
};
#define classic_shift_chroma_table_size 59
static const unsigned char classic_shift_chroma[classic_shift_chroma_table_size + AV_INPUT_BUFFER_PADDING_SIZE] = {
66, 36, 37, 38, 39, 40, 41, 75, 76, 77, 110, 239, 144, 81, 82, 83,
84, 85, 118, 183, 56, 57, 88, 89, 56, 89, 154, 57, 58, 57, 26, 141,
57, 56, 58, 57, 58, 57, 184, 119, 214, 245, 116, 83, 82, 49, 80, 79,
78, 77, 44, 75, 41, 40, 39, 38, 37, 36, 34, 0,
0,0,0,0,0,0,0,0,
};
static const unsigned char classic_add_luma[256] = {
3, 9, 5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37,
73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36,
68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36,
35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39,
37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37,
35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29,
27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16,
15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14,
12, 17, 19, 13, 4, 9, 2, 11, 1, 7, 8, 0, 16, 3, 14, 6,
12, 10, 5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15,
18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25,
28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49,
28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60,
62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52,
54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43,
46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13, 7, 8,
};
static const unsigned char classic_add_chroma[256] = {
3, 1, 2, 2, 2, 2, 3, 3, 7, 5, 7, 5, 8, 6, 11, 9,
7, 13, 11, 10, 9, 8, 7, 5, 9, 7, 6, 4, 7, 5, 8, 7,
11, 8, 13, 11, 19, 15, 22, 23, 20, 33, 32, 28, 27, 29, 51, 77,
43, 45, 76, 81, 46, 82, 75, 55, 56, 144, 58, 80, 60, 74, 147, 63,
143, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 27, 30, 21, 22,
17, 14, 5, 6, 100, 54, 47, 50, 51, 53, 106, 107, 108, 109, 110, 111,
112, 113, 114, 115, 4, 117, 118, 92, 94, 121, 122, 3, 124, 103, 2, 1,
0, 129, 130, 131, 120, 119, 126, 125, 136, 137, 138, 139, 140, 141, 142, 134,
135, 132, 133, 104, 64, 101, 62, 57, 102, 95, 93, 59, 61, 28, 97, 96,
52, 49, 48, 29, 32, 25, 24, 46, 23, 98, 45, 44, 43, 20, 42, 41,
19, 18, 99, 40, 15, 39, 38, 16, 13, 12, 11, 37, 10, 9, 8, 36,
7, 128, 127, 105, 123, 116, 35, 34, 33, 145, 31, 79, 42, 146, 78, 26,
83, 48, 49, 50, 44, 47, 26, 31, 30, 18, 17, 19, 21, 24, 25, 13,
14, 16, 17, 18, 20, 21, 12, 14, 15, 9, 10, 6, 9, 6, 5, 8,
6, 12, 8, 10, 7, 9, 6, 4, 6, 2, 2, 3, 3, 3, 3, 2,
};
static int read_len_table(uint8_t *dst, GetBitContext *gb, int n)
{
int i, val, repeat;
for (i = 0; i < n;) {
repeat = get_bits(gb, 3);
val = get_bits(gb, 5);
if (repeat == 0)
repeat = get_bits(gb, 8);
if (i + repeat > n || get_bits_left(gb) < 0) {
av_log(NULL, AV_LOG_ERROR, "Error reading huffman table\n");
return AVERROR_INVALIDDATA;
}
while (repeat--)
dst[i++] = val;
}
return 0;
}
static int generate_joint_tables(HYuvContext *s)
{
int ret;
uint16_t *symbols = av_mallocz(5 << VLC_BITS);
uint16_t *bits;
uint8_t *len;
if (!symbols)
return AVERROR(ENOMEM);
bits = symbols + (1 << VLC_BITS);
len = (uint8_t *)(bits + (1 << VLC_BITS));
if (s->bitstream_bpp < 24 || s->version > 2) {
int p, i, y, u;
for (p = 0; p < 4; p++) {
int p0 = s->version > 2 ? p : 0;
for (i = y = 0; y < s->vlc_n; y++) {
int len0 = s->len[p0][y];
int limit = VLC_BITS - len0;
if (limit <= 0 || !len0)
continue;
if ((sign_extend(y, 8) & (s->vlc_n-1)) != y)
continue;
for (u = 0; u < s->vlc_n; u++) {
int len1 = s->len[p][u];
if (len1 > limit || !len1)
continue;
if ((sign_extend(u, 8) & (s->vlc_n-1)) != u)
continue;
av_assert0(i < (1 << VLC_BITS));
len[i] = len0 + len1;
bits[i] = (s->bits[p0][y] << len1) + s->bits[p][u];
symbols[i] = (y << 8) + (u & 0xFF);
i++;
}
}
ff_free_vlc(&s->vlc[4 + p]);
if ((ret = ff_init_vlc_sparse(&s->vlc[4 + p], VLC_BITS, i, len, 1, 1,
bits, 2, 2, symbols, 2, 2, 0)) < 0)
goto out;
}
} else {
uint8_t (*map)[4] = (uint8_t(*)[4]) s->pix_bgr_map;
int i, b, g, r, code;
int p0 = s->decorrelate;
int p1 = !s->decorrelate;
/* Restrict the range to +/-16 because that's pretty much guaranteed
* to cover all the combinations that fit in 11 bits total, and it
* does not matter if we miss a few rare codes. */
for (i = 0, g = -16; g < 16; g++) {
int len0 = s->len[p0][g & 255];
int limit0 = VLC_BITS - len0;
if (limit0 < 2 || !len0)
continue;
for (b = -16; b < 16; b++) {
int len1 = s->len[p1][b & 255];
int limit1 = limit0 - len1;
if (limit1 < 1 || !len1)
continue;
code = (s->bits[p0][g & 255] << len1) + s->bits[p1][b & 255];
for (r = -16; r < 16; r++) {
int len2 = s->len[2][r & 255];
if (len2 > limit1 || !len2)
continue;
av_assert0(i < (1 << VLC_BITS));
len[i] = len0 + len1 + len2;
bits[i] = (code << len2) + s->bits[2][r & 255];
if (s->decorrelate) {
map[i][G] = g;
map[i][B] = g + b;
map[i][R] = g + r;
} else {
map[i][B] = g;
map[i][G] = b;
map[i][R] = r;
}
i++;
}
}
}
ff_free_vlc(&s->vlc[4]);
if ((ret = init_vlc(&s->vlc[4], VLC_BITS, i, len, 1, 1,
bits, 2, 2, 0)) < 0)
goto out;
}
ret = 0;
out:
av_freep(&symbols);
return ret;
}
static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length)
{
GetBitContext gb;
int i, ret;
int count = 3;
if ((ret = init_get_bits(&gb, src, length * 8)) < 0)
return ret;
if (s->version > 2)
count = 1 + s->alpha + 2*s->chroma;
for (i = 0; i < count; i++) {
if ((ret = read_len_table(s->len[i], &gb, s->vlc_n)) < 0)
return ret;
if ((ret = ff_huffyuv_generate_bits_table(s->bits[i], s->len[i], s->vlc_n)) < 0)
return ret;
ff_free_vlc(&s->vlc[i]);
if ((ret = init_vlc(&s->vlc[i], VLC_BITS, s->vlc_n, s->len[i], 1, 1,
s->bits[i], 4, 4, 0)) < 0)
return ret;
}
if ((ret = generate_joint_tables(s)) < 0)
return ret;
return (get_bits_count(&gb) + 7) / 8;
}
static int read_old_huffman_tables(HYuvContext *s)
{
GetBitContext gb;
int i, ret;
init_get_bits(&gb, classic_shift_luma,
classic_shift_luma_table_size * 8);
if ((ret = read_len_table(s->len[0], &gb, 256)) < 0)
return ret;
init_get_bits(&gb, classic_shift_chroma,
classic_shift_chroma_table_size * 8);
if ((ret = read_len_table(s->len[1], &gb, 256)) < 0)
return ret;
for (i = 0; i < 256; i++)
s->bits[0][i] = classic_add_luma[i];
for (i = 0; i < 256; i++)
s->bits[1][i] = classic_add_chroma[i];
if (s->bitstream_bpp >= 24) {
memcpy(s->bits[1], s->bits[0], 256 * sizeof(uint32_t));
memcpy(s->len[1], s->len[0], 256 * sizeof(uint8_t));
}
memcpy(s->bits[2], s->bits[1], 256 * sizeof(uint32_t));
memcpy(s->len[2], s->len[1], 256 * sizeof(uint8_t));
for (i = 0; i < 4; i++) {
ff_free_vlc(&s->vlc[i]);
if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
s->bits[i], 4, 4, 0)) < 0)
return ret;
}
if ((ret = generate_joint_tables(s)) < 0)
return ret;
return 0;
}
static av_cold int decode_end(AVCodecContext *avctx)
{
HYuvContext *s = avctx->priv_data;
int i;
ff_huffyuv_common_end(s);
av_freep(&s->bitstream_buffer);
for (i = 0; i < 8; i++)
ff_free_vlc(&s->vlc[i]);
return 0;
}
static av_cold int decode_init(AVCodecContext *avctx)
{
HYuvContext *s = avctx->priv_data;
int ret;
ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
if (ret < 0)
return ret;
ff_huffyuvdsp_init(&s->hdsp, avctx->pix_fmt);
ff_llviddsp_init(&s->llviddsp);
memset(s->vlc, 0, 4 * sizeof(VLC));
s->interlaced = avctx->height > 288;
s->bgr32 = 1;
if (avctx->extradata_size) {
if ((avctx->bits_per_coded_sample & 7) &&
avctx->bits_per_coded_sample != 12)
s->version = 1; // do such files exist at all?
else if (avctx->extradata_size > 3 && avctx->extradata[3] == 0)
s->version = 2;
else
s->version = 3;
} else
s->version = 0;
s->bps = 8;
s->n = 1<<s->bps;
s->vlc_n = FFMIN(s->n, MAX_VLC_N);
s->chroma = 1;
if (s->version >= 2) {
int method, interlace;
if (avctx->extradata_size < 4)
return AVERROR_INVALIDDATA;
method = avctx->extradata[0];
s->decorrelate = method & 64 ? 1 : 0;
s->predictor = method & 63;
if (s->version == 2) {
s->bitstream_bpp = avctx->extradata[1];
if (s->bitstream_bpp == 0)
s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
} else {
s->bps = (avctx->extradata[1] >> 4) + 1;
s->n = 1<<s->bps;
s->vlc_n = FFMIN(s->n, MAX_VLC_N);
s->chroma_h_shift = avctx->extradata[1] & 3;
s->chroma_v_shift = (avctx->extradata[1] >> 2) & 3;
s->yuv = !!(avctx->extradata[2] & 1);
s->chroma= !!(avctx->extradata[2] & 3);
s->alpha = !!(avctx->extradata[2] & 4);
}
interlace = (avctx->extradata[2] & 0x30) >> 4;
s->interlaced = (interlace == 1) ? 1 : (interlace == 2) ? 0 : s->interlaced;
s->context = avctx->extradata[2] & 0x40 ? 1 : 0;
if ((ret = read_huffman_tables(s, avctx->extradata + 4,
avctx->extradata_size - 4)) < 0)
goto error;
} else {
switch (avctx->bits_per_coded_sample & 7) {
case 1:
s->predictor = LEFT;
s->decorrelate = 0;
break;
case 2:
s->predictor = LEFT;
s->decorrelate = 1;
break;
case 3:
s->predictor = PLANE;
s->decorrelate = avctx->bits_per_coded_sample >= 24;
break;
case 4:
s->predictor = MEDIAN;
s->decorrelate = 0;
break;
default:
s->predictor = LEFT; // OLD
s->decorrelate = 0;
break;
}
s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
s->context = 0;
if ((ret = read_old_huffman_tables(s)) < 0)
goto error;
}
if (s->version <= 2) {
switch (s->bitstream_bpp) {
case 12:
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
s->yuv = 1;
break;
case 16:
if (s->yuy2)
avctx->pix_fmt = AV_PIX_FMT_YUYV422;
else
avctx->pix_fmt = AV_PIX_FMT_YUV422P;
s->yuv = 1;
break;
case 24:
if (s->bgr32)
avctx->pix_fmt = AV_PIX_FMT_0RGB32;
else
avctx->pix_fmt = AV_PIX_FMT_BGR24;
break;
case 32:
av_assert0(s->bgr32);
avctx->pix_fmt = AV_PIX_FMT_RGB32;
s->alpha = 1;
break;
default:
ret = AVERROR_INVALIDDATA;
goto error;
}
av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt,
&s->chroma_h_shift,
&s->chroma_v_shift);
} else {
switch ( (s->chroma<<10) | (s->yuv<<9) | (s->alpha<<8) | ((s->bps-1)<<4) | s->chroma_h_shift | (s->chroma_v_shift<<2)) {
case 0x070:
avctx->pix_fmt = AV_PIX_FMT_GRAY8;
break;
case 0x0F0:
avctx->pix_fmt = AV_PIX_FMT_GRAY16;
break;
case 0x470:
avctx->pix_fmt = AV_PIX_FMT_GBRP;
break;
case 0x480:
avctx->pix_fmt = AV_PIX_FMT_GBRP9;
break;
case 0x490:
avctx->pix_fmt = AV_PIX_FMT_GBRP10;
break;
case 0x4B0:
avctx->pix_fmt = AV_PIX_FMT_GBRP12;
break;
case 0x4D0:
avctx->pix_fmt = AV_PIX_FMT_GBRP14;
break;
case 0x4F0:
avctx->pix_fmt = AV_PIX_FMT_GBRP16;
break;
case 0x570:
avctx->pix_fmt = AV_PIX_FMT_GBRAP;
break;
case 0x670:
avctx->pix_fmt = AV_PIX_FMT_YUV444P;
break;
case 0x680:
avctx->pix_fmt = AV_PIX_FMT_YUV444P9;
break;
case 0x690:
avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
break;
case 0x6B0:
avctx->pix_fmt = AV_PIX_FMT_YUV444P12;
break;
case 0x6D0:
avctx->pix_fmt = AV_PIX_FMT_YUV444P14;
break;
case 0x6F0:
avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
break;
case 0x671:
avctx->pix_fmt = AV_PIX_FMT_YUV422P;
break;
case 0x681:
avctx->pix_fmt = AV_PIX_FMT_YUV422P9;
break;
case 0x691:
avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
break;
case 0x6B1:
avctx->pix_fmt = AV_PIX_FMT_YUV422P12;
break;
case 0x6D1:
avctx->pix_fmt = AV_PIX_FMT_YUV422P14;
break;
case 0x6F1:
avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
break;
case 0x672:
avctx->pix_fmt = AV_PIX_FMT_YUV411P;
break;
case 0x674:
avctx->pix_fmt = AV_PIX_FMT_YUV440P;
break;
case 0x675:
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
break;
case 0x685:
avctx->pix_fmt = AV_PIX_FMT_YUV420P9;
break;
case 0x695:
avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
break;
case 0x6B5:
avctx->pix_fmt = AV_PIX_FMT_YUV420P12;
break;
case 0x6D5:
avctx->pix_fmt = AV_PIX_FMT_YUV420P14;
break;
case 0x6F5:
avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
break;
case 0x67A:
avctx->pix_fmt = AV_PIX_FMT_YUV410P;
break;
case 0x770:
avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
break;
case 0x780:
avctx->pix_fmt = AV_PIX_FMT_YUVA444P9;
break;
case 0x790:
avctx->pix_fmt = AV_PIX_FMT_YUVA444P10;
break;
case 0x7F0:
avctx->pix_fmt = AV_PIX_FMT_YUVA444P16;
break;
case 0x771:
avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
break;
case 0x781:
avctx->pix_fmt = AV_PIX_FMT_YUVA422P9;
break;
case 0x791:
avctx->pix_fmt = AV_PIX_FMT_YUVA422P10;
break;
case 0x7F1:
avctx->pix_fmt = AV_PIX_FMT_YUVA422P16;
break;
case 0x775:
avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
break;
case 0x785:
avctx->pix_fmt = AV_PIX_FMT_YUVA420P9;
break;
case 0x795:
avctx->pix_fmt = AV_PIX_FMT_YUVA420P10;
break;
case 0x7F5:
avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
break;
default:
ret = AVERROR_INVALIDDATA;
goto error;
}
}
ff_huffyuv_common_init(avctx);
if ((avctx->pix_fmt == AV_PIX_FMT_YUV422P || avctx->pix_fmt == AV_PIX_FMT_YUV420P) && avctx->width & 1) {
av_log(avctx, AV_LOG_ERROR, "width must be even for this colorspace\n");
ret = AVERROR_INVALIDDATA;
goto error;
}
if (s->predictor == MEDIAN && avctx->pix_fmt == AV_PIX_FMT_YUV422P &&
avctx->width % 4) {
av_log(avctx, AV_LOG_ERROR, "width must be a multiple of 4 "
"for this combination of colorspace and predictor type.\n");
ret = AVERROR_INVALIDDATA;
goto error;
}
if ((ret = ff_huffyuv_alloc_temp(s)) < 0) {
ff_huffyuv_common_end(s);
goto error;
}
return 0;
error:
decode_end(avctx);
return ret;
}
/** Subset of GET_VLC for use in hand-roller VLC code */
#define VLC_INTERN(dst, table, gb, name, bits, max_depth) \
code = table[index][0]; \
n = table[index][1]; \
if (max_depth > 1 && n < 0) { \
LAST_SKIP_BITS(name, gb, bits); \
UPDATE_CACHE(name, gb); \
\
nb_bits = -n; \
index = SHOW_UBITS(name, gb, nb_bits) + code; \
code = table[index][0]; \
n = table[index][1]; \
if (max_depth > 2 && n < 0) { \
LAST_SKIP_BITS(name, gb, nb_bits); \
UPDATE_CACHE(name, gb); \
\
nb_bits = -n; \
index = SHOW_UBITS(name, gb, nb_bits) + code; \
code = table[index][0]; \
n = table[index][1]; \
} \
} \
dst = code; \
LAST_SKIP_BITS(name, gb, n)
#define GET_VLC_DUAL(dst0, dst1, name, gb, dtable, table1, table2, \
bits, max_depth, OP) \
do { \
unsigned int index = SHOW_UBITS(name, gb, bits); \
int code, n = dtable[index][1]; \
\
if (n<=0) { \
int nb_bits; \
VLC_INTERN(dst0, table1, gb, name, bits, max_depth); \
\
UPDATE_CACHE(re, gb); \
index = SHOW_UBITS(name, gb, bits); \
VLC_INTERN(dst1, table2, gb, name, bits, max_depth); \
} else { \
code = dtable[index][0]; \
OP(dst0, dst1, code); \
LAST_SKIP_BITS(name, gb, n); \
} \
} while (0)
#define OP8bits(dst0, dst1, code) dst0 = code>>8; dst1 = code
#define READ_2PIX(dst0, dst1, plane1) \
UPDATE_CACHE(re, &s->gb); \
GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane1].table, \
s->vlc[0].table, s->vlc[plane1].table, VLC_BITS, 3, OP8bits)
static void decode_422_bitstream(HYuvContext *s, int count)
{
int i, icount;
OPEN_READER(re, &s->gb);
count /= 2;
icount = get_bits_left(&s->gb) / (32 * 4);
if (count >= icount) {
for (i = 0; i < icount; i++) {
READ_2PIX(s->temp[0][2 * i], s->temp[1][i], 1);
READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
}
for (; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
READ_2PIX(s->temp[0][2 * i ], s->temp[1][i], 1);
if (BITS_LEFT(re, &s->gb) <= 0) break;
READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
}
for (; i < count; i++)
s->temp[0][2 * i ] = s->temp[1][i] =
s->temp[0][2 * i + 1] = s->temp[2][i] = 0;
} else {
for (i = 0; i < count; i++) {
READ_2PIX(s->temp[0][2 * i], s->temp[1][i], 1);
READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
}
}
CLOSE_READER(re, &s->gb);
}
#define READ_2PIX_PLANE(dst0, dst1, plane, OP) \
UPDATE_CACHE(re, &s->gb); \
GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane].table, \
s->vlc[plane].table, s->vlc[plane].table, VLC_BITS, 3, OP)
#define OP14bits(dst0, dst1, code) dst0 = code>>8; dst1 = sign_extend(code, 8)
/* TODO instead of restarting the read when the code isn't in the first level
* of the joint table, jump into the 2nd level of the individual table. */
#define READ_2PIX_PLANE16(dst0, dst1, plane){\
dst0 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;\
dst0 += get_bits(&s->gb, 2);\
dst1 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;\
dst1 += get_bits(&s->gb, 2);\
}
static void decode_plane_bitstream(HYuvContext *s, int width, int plane)
{
int i, count = width/2;
if (s->bps <= 8) {
OPEN_READER(re, &s->gb);
if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane, OP8bits);
}
} else {
for(i=0; i<count; i++){
READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane, OP8bits);
}
}
if( width&1 && BITS_LEFT(re, &s->gb)>0 ) {
unsigned int index;
int nb_bits, code, n;
UPDATE_CACHE(re, &s->gb);
index = SHOW_UBITS(re, &s->gb, VLC_BITS);
VLC_INTERN(s->temp[0][width-1], s->vlc[plane].table,
&s->gb, re, VLC_BITS, 3);
}
CLOSE_READER(re, &s->gb);
} else if (s->bps <= 14) {
OPEN_READER(re, &s->gb);
if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
READ_2PIX_PLANE(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane, OP14bits);
}
} else {
for(i=0; i<count; i++){
READ_2PIX_PLANE(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane, OP14bits);
}
}
if( width&1 && BITS_LEFT(re, &s->gb)>0 ) {
unsigned int index;
int nb_bits, code, n;
UPDATE_CACHE(re, &s->gb);
index = SHOW_UBITS(re, &s->gb, VLC_BITS);
VLC_INTERN(s->temp16[0][width-1], s->vlc[plane].table,
&s->gb, re, VLC_BITS, 3);
}
CLOSE_READER(re, &s->gb);
} else {
if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
}
} else {
for(i=0; i<count; i++){
READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
}
}
if( width&1 && get_bits_left(&s->gb)>0 ) {
int dst = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;
s->temp16[0][width-1] = dst + get_bits(&s->gb, 2);
}
}
}
static void decode_gray_bitstream(HYuvContext *s, int count)
{
int i;
OPEN_READER(re, &s->gb);
count /= 2;
if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
}
} else {
for (i = 0; i < count; i++) {
READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
}
}
CLOSE_READER(re, &s->gb);
}
static av_always_inline void decode_bgr_1(HYuvContext *s, int count,
int decorrelate, int alpha)
{
int i;
OPEN_READER(re, &s->gb);
for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
unsigned int index;
int code, n, nb_bits;
UPDATE_CACHE(re, &s->gb);
index = SHOW_UBITS(re, &s->gb, VLC_BITS);
n = s->vlc[4].table[index][1];
if (n>0) {
code = s->vlc[4].table[index][0];
*(uint32_t *) &s->temp[0][4 * i] = s->pix_bgr_map[code];
LAST_SKIP_BITS(re, &s->gb, n);
} else {
if (decorrelate) {
VLC_INTERN(s->temp[0][4 * i + G], s->vlc[1].table,
&s->gb, re, VLC_BITS, 3);
UPDATE_CACHE(re, &s->gb);
index = SHOW_UBITS(re, &s->gb, VLC_BITS);
VLC_INTERN(code, s->vlc[0].table, &s->gb, re, VLC_BITS, 3);
s->temp[0][4 * i + B] = code + s->temp[0][4 * i + G];
UPDATE_CACHE(re, &s->gb);
index = SHOW_UBITS(re, &s->gb, VLC_BITS);
VLC_INTERN(code, s->vlc[2].table, &s->gb, re, VLC_BITS, 3);
s->temp[0][4 * i + R] = code + s->temp[0][4 * i + G];
} else {
VLC_INTERN(s->temp[0][4 * i + B], s->vlc[0].table,
&s->gb, re, VLC_BITS, 3);
UPDATE_CACHE(re, &s->gb);
index = SHOW_UBITS(re, &s->gb, VLC_BITS);
VLC_INTERN(s->temp[0][4 * i + G], s->vlc[1].table,
&s->gb, re, VLC_BITS, 3);
UPDATE_CACHE(re, &s->gb);
index = SHOW_UBITS(re, &s->gb, VLC_BITS);
VLC_INTERN(s->temp[0][4 * i + R], s->vlc[2].table,
&s->gb, re, VLC_BITS, 3);
}
}
if (alpha) {
UPDATE_CACHE(re, &s->gb);
index = SHOW_UBITS(re, &s->gb, VLC_BITS);
VLC_INTERN(s->temp[0][4 * i + A], s->vlc[2].table,
&s->gb, re, VLC_BITS, 3);
} else
s->temp[0][4 * i + A] = 0;
}
CLOSE_READER(re, &s->gb);
}
static void decode_bgr_bitstream(HYuvContext *s, int count)
{
if (s->decorrelate) {
if (s->bitstream_bpp == 24)
decode_bgr_1(s, count, 1, 0);
else
decode_bgr_1(s, count, 1, 1);
} else {
if (s->bitstream_bpp == 24)
decode_bgr_1(s, count, 0, 0);
else
decode_bgr_1(s, count, 0, 1);
}
}
static void draw_slice(HYuvContext *s, AVFrame *frame, int y)
{
int h, cy, i;
int offset[AV_NUM_DATA_POINTERS];
if (!s->avctx->draw_horiz_band)
return;
h = y - s->last_slice_end;
y -= h;
if (s->bitstream_bpp == 12)
cy = y >> 1;
else
cy = y;
offset[0] = frame->linesize[0] * y;
offset[1] = frame->linesize[1] * cy;
offset[2] = frame->linesize[2] * cy;
for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
offset[i] = 0;
emms_c();
s->avctx->draw_horiz_band(s->avctx, frame, offset, y, 3, h);
s->last_slice_end = y + h;
}
static int left_prediction(HYuvContext *s, uint8_t *dst, const uint8_t *src, int w, int acc)
{
if (s->bps <= 8) {
return s->llviddsp.add_left_pred(dst, src, w, acc);
} else {
return s->llviddsp.add_left_pred_int16(( uint16_t *)dst, (const uint16_t *)src, s->n-1, w, acc);
}
}
static void add_bytes(HYuvContext *s, uint8_t *dst, uint8_t *src, int w)
{
if (s->bps <= 8) {
s->llviddsp.add_bytes(dst, src, w);
} else {
s->hdsp.add_int16((uint16_t*)dst, (const uint16_t*)src, s->n - 1, w);
}
}
static void add_median_prediction(HYuvContext *s, uint8_t *dst, const uint8_t *src, const uint8_t *diff, int w, int *left, int *left_top)
{
if (s->bps <= 8) {
s->llviddsp.add_median_pred(dst, src, diff, w, left, left_top);
} else {
s->hdsp.add_hfyu_median_pred_int16((uint16_t *)dst, (const uint16_t *)src, (const uint16_t *)diff, s->n-1, w, left, left_top);
}
}
static int decode_slice(AVCodecContext *avctx, AVFrame *p, int height,
int buf_size, int y_offset, int table_size)
{
HYuvContext *s = avctx->priv_data;
int fake_ystride, fake_ustride, fake_vstride;
const int width = s->width;
const int width2 = s->width >> 1;
int ret;
if ((ret = init_get_bits8(&s->gb, s->bitstream_buffer + table_size, buf_size - table_size)) < 0)
return ret;
fake_ystride = s->interlaced ? p->linesize[0] * 2 : p->linesize[0];
fake_ustride = s->interlaced ? p->linesize[1] * 2 : p->linesize[1];
fake_vstride = s->interlaced ? p->linesize[2] * 2 : p->linesize[2];
if (s->version > 2) {
int plane;
for(plane = 0; plane < 1 + 2*s->chroma + s->alpha; plane++) {
int left, lefttop, y;
int w = width;
int h = height;
int fake_stride = fake_ystride;
if (s->chroma && (plane == 1 || plane == 2)) {
w >>= s->chroma_h_shift;
h >>= s->chroma_v_shift;
fake_stride = plane == 1 ? fake_ustride : fake_vstride;
}
switch (s->predictor) {
case LEFT:
case PLANE:
decode_plane_bitstream(s, w, plane);
left = left_prediction(s, p->data[plane], s->temp[0], w, 0);
for (y = 1; y < h; y++) {
uint8_t *dst = p->data[plane] + p->linesize[plane]*y;
decode_plane_bitstream(s, w, plane);
left = left_prediction(s, dst, s->temp[0], w, left);
if (s->predictor == PLANE) {
if (y > s->interlaced) {
add_bytes(s, dst, dst - fake_stride, w);
}
}
}
break;
case MEDIAN:
decode_plane_bitstream(s, w, plane);
left= left_prediction(s, p->data[plane], s->temp[0], w, 0);
y = 1;
if (y >= h)
break;
/* second line is left predicted for interlaced case */
if (s->interlaced) {
decode_plane_bitstream(s, w, plane);
left = left_prediction(s, p->data[plane] + p->linesize[plane], s->temp[0], w, left);
y++;
if (y >= h)
break;
}
lefttop = p->data[plane][0];
decode_plane_bitstream(s, w, plane);
add_median_prediction(s, p->data[plane] + fake_stride, p->data[plane], s->temp[0], w, &left, &lefttop);
y++;
for (; y<h; y++) {
uint8_t *dst;
decode_plane_bitstream(s, w, plane);
dst = p->data[plane] + p->linesize[plane] * y;
add_median_prediction(s, dst, dst - fake_stride, s->temp[0], w, &left, &lefttop);
}
break;
}
}
draw_slice(s, p, height);
} else if (s->bitstream_bpp < 24) {
int y, cy;
int lefty, leftu, leftv;
int lefttopy, lefttopu, lefttopv;
if (s->yuy2) {
p->data[0][3] = get_bits(&s->gb, 8);
p->data[0][2] = get_bits(&s->gb, 8);
p->data[0][1] = get_bits(&s->gb, 8);
p->data[0][0] = get_bits(&s->gb, 8);
av_log(avctx, AV_LOG_ERROR,
"YUY2 output is not implemented yet\n");
return AVERROR_PATCHWELCOME;
} else {
leftv =
p->data[2][0 + y_offset * p->linesize[2]] = get_bits(&s->gb, 8);
lefty =
p->data[0][1 + y_offset * p->linesize[0]] = get_bits(&s->gb, 8);
leftu =
p->data[1][0 + y_offset * p->linesize[1]] = get_bits(&s->gb, 8);
p->data[0][0 + y_offset * p->linesize[0]] = get_bits(&s->gb, 8);
switch (s->predictor) {
case LEFT:
case PLANE:
decode_422_bitstream(s, width - 2);
lefty = s->llviddsp.add_left_pred(p->data[0] + p->linesize[0] * y_offset + 2, s->temp[0],
width - 2, lefty);
if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
leftu = s->llviddsp.add_left_pred(p->data[1] + p->linesize[1] * y_offset + 1, s->temp[1], width2 - 1, leftu);
leftv = s->llviddsp.add_left_pred(p->data[2] + p->linesize[2] * y_offset + 1, s->temp[2], width2 - 1, leftv);
}
for (cy = y = 1; y < height; y++, cy++) {
uint8_t *ydst, *udst, *vdst;
if (s->bitstream_bpp == 12) {
decode_gray_bitstream(s, width);
ydst = p->data[0] + p->linesize[0] * (y + y_offset);
lefty = s->llviddsp.add_left_pred(ydst, s->temp[0],
width, lefty);
if (s->predictor == PLANE) {
if (y > s->interlaced)
s->llviddsp.add_bytes(ydst, ydst - fake_ystride, width);
}
y++;
if (y >= height)
break;
}
draw_slice(s, p, y);
ydst = p->data[0] + p->linesize[0] * (y + y_offset);
udst = p->data[1] + p->linesize[1] * (cy + y_offset);
vdst = p->data[2] + p->linesize[2] * (cy + y_offset);
decode_422_bitstream(s, width);
lefty = s->llviddsp.add_left_pred(ydst, s->temp[0],
width, lefty);
if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
leftu = s->llviddsp.add_left_pred(udst, s->temp[1], width2, leftu);
leftv = s->llviddsp.add_left_pred(vdst, s->temp[2], width2, leftv);
}
if (s->predictor == PLANE) {
if (cy > s->interlaced) {
s->llviddsp.add_bytes(ydst, ydst - fake_ystride, width);
if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
s->llviddsp.add_bytes(udst, udst - fake_ustride, width2);
s->llviddsp.add_bytes(vdst, vdst - fake_vstride, width2);
}
}
}
}
draw_slice(s, p, height);
break;
case MEDIAN:
/* first line except first 2 pixels is left predicted */
decode_422_bitstream(s, width - 2);
lefty = s->llviddsp.add_left_pred(p->data[0] + 2, s->temp[0],
width - 2, lefty);
if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
leftu = s->llviddsp.add_left_pred(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
leftv = s->llviddsp.add_left_pred(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
}
cy = y = 1;
if (y >= height)
break;
/* second line is left predicted for interlaced case */
if (s->interlaced) {
decode_422_bitstream(s, width);
lefty = s->llviddsp.add_left_pred(p->data[0] + p->linesize[0],
s->temp[0], width, lefty);
if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
leftu = s->llviddsp.add_left_pred(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);
leftv = s->llviddsp.add_left_pred(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);
}
y++;
cy++;
if (y >= height)
break;
}
/* next 4 pixels are left predicted too */
decode_422_bitstream(s, 4);
lefty = s->llviddsp.add_left_pred(p->data[0] + fake_ystride,
s->temp[0], 4, lefty);
if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
leftu = s->llviddsp.add_left_pred(p->data[1] + fake_ustride, s->temp[1], 2, leftu);
leftv = s->llviddsp.add_left_pred(p->data[2] + fake_vstride, s->temp[2], 2, leftv);
}
/* next line except the first 4 pixels is median predicted */
lefttopy = p->data[0][3];
decode_422_bitstream(s, width - 4);
s->llviddsp.add_median_pred(p->data[0] + fake_ystride + 4,
p->data[0] + 4, s->temp[0],
width - 4, &lefty, &lefttopy);
if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
lefttopu = p->data[1][1];
lefttopv = p->data[2][1];
s->llviddsp.add_median_pred(p->data[1] + fake_ustride + 2, p->data[1] + 2, s->temp[1], width2 - 2, &leftu, &lefttopu);
s->llviddsp.add_median_pred(p->data[2] + fake_vstride + 2, p->data[2] + 2, s->temp[2], width2 - 2, &leftv, &lefttopv);
}
y++;
cy++;
for (; y < height; y++, cy++) {
uint8_t *ydst, *udst, *vdst;
if (s->bitstream_bpp == 12) {
while (2 * cy > y) {
decode_gray_bitstream(s, width);
ydst = p->data[0] + p->linesize[0] * y;
s->llviddsp.add_median_pred(ydst, ydst - fake_ystride,
s->temp[0], width,
&lefty, &lefttopy);
y++;
}
if (y >= height)
break;
}
draw_slice(s, p, y);
decode_422_bitstream(s, width);
ydst = p->data[0] + p->linesize[0] * y;
udst = p->data[1] + p->linesize[1] * cy;
vdst = p->data[2] + p->linesize[2] * cy;
s->llviddsp.add_median_pred(ydst, ydst - fake_ystride,
s->temp[0], width,
&lefty, &lefttopy);
if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
s->llviddsp.add_median_pred(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);
s->llviddsp.add_median_pred(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);
}
}
draw_slice(s, p, height);
break;
}
}
} else {
int y;
uint8_t left[4];
const int last_line = (y_offset + height - 1) * p->linesize[0];
if (s->bitstream_bpp == 32) {
left[A] = p->data[0][last_line + A] = get_bits(&s->gb, 8);
left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
left[B] = p->data[0][last_line + B] = get_bits(&s->gb, 8);
} else {
left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
left[B] = p->data[0][last_line + B] = get_bits(&s->gb, 8);
left[A] = p->data[0][last_line + A] = 255;
skip_bits(&s->gb, 8);
}
if (s->bgr32) {
switch (s->predictor) {
case LEFT:
case PLANE:
decode_bgr_bitstream(s, width - 1);
s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + last_line + 4,
s->temp[0], width - 1, left);
for (y = height - 2; y >= 0; y--) { // Yes it is stored upside down.
decode_bgr_bitstream(s, width);
s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + p->linesize[0] * (y + y_offset),
s->temp[0], width, left);
if (s->predictor == PLANE) {
if (s->bitstream_bpp != 32)
left[A] = 0;
if (y < height - 1 - s->interlaced) {
s->llviddsp.add_bytes(p->data[0] + p->linesize[0] * (y + y_offset),
p->data[0] + p->linesize[0] * (y + y_offset) +
fake_ystride, 4 * width);
}
}
}
// just 1 large slice as this is not possible in reverse order
draw_slice(s, p, height);
break;
default:
av_log(avctx, AV_LOG_ERROR,
"prediction type not supported!\n");
}
} else {
av_log(avctx, AV_LOG_ERROR,
"BGR24 output is not implemented yet\n");
return AVERROR_PATCHWELCOME;
}
}
return 0;
}
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
HYuvContext *s = avctx->priv_data;
const int width = s->width;
const int height = s->height;
ThreadFrame frame = { .f = data };
AVFrame *const p = data;
int slice, table_size = 0, ret, nb_slices;
unsigned slices_info_offset;
int slice_height;
if (buf_size < (width * height + 7)/8)
return AVERROR_INVALIDDATA;
av_fast_padded_malloc(&s->bitstream_buffer,
&s->bitstream_buffer_size,
buf_size);
if (!s->bitstream_buffer)
return AVERROR(ENOMEM);
s->bdsp.bswap_buf((uint32_t *) s->bitstream_buffer,
(const uint32_t *) buf, buf_size / 4);
if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
return ret;
if (s->context) {
table_size = read_huffman_tables(s, s->bitstream_buffer, buf_size);
if (table_size < 0)
return table_size;
}
if ((unsigned) (buf_size - table_size) >= INT_MAX / 8)
return AVERROR_INVALIDDATA;
s->last_slice_end = 0;
if (avctx->codec_id == AV_CODEC_ID_HYMT &&
(buf_size > 32 && AV_RL32(avpkt->data + buf_size - 16) == 0)) {
slices_info_offset = AV_RL32(avpkt->data + buf_size - 4);
slice_height = AV_RL32(avpkt->data + buf_size - 8);
nb_slices = AV_RL32(avpkt->data + buf_size - 12);
if (nb_slices * 8LL + slices_info_offset > buf_size - 16 ||
s->chroma_v_shift ||
slice_height <= 0 || nb_slices * (uint64_t)slice_height > height)
return AVERROR_INVALIDDATA;
} else {
slice_height = height;
nb_slices = 1;
}
for (slice = 0; slice < nb_slices; slice++) {
int y_offset, slice_offset, slice_size;
if (nb_slices > 1) {
slice_offset = AV_RL32(avpkt->data + slices_info_offset + slice * 8);
slice_size = AV_RL32(avpkt->data + slices_info_offset + slice * 8 + 4);
if (slice_offset < 0 || slice_size <= 0 || (slice_offset&3) ||
slice_offset + (int64_t)slice_size > buf_size)
return AVERROR_INVALIDDATA;
y_offset = height - (slice + 1) * slice_height;
s->bdsp.bswap_buf((uint32_t *)s->bitstream_buffer,
(const uint32_t *)(buf + slice_offset), slice_size / 4);
} else {
y_offset = 0;
slice_offset = 0;
slice_size = buf_size;
}
ret = decode_slice(avctx, p, slice_height, slice_size, y_offset, table_size);
emms_c();
if (ret < 0)
return ret;
}
*got_frame = 1;
return (get_bits_count(&s->gb) + 31) / 32 * 4 + table_size;
}
const AVCodec ff_huffyuv_decoder = {
.name = "huffyuv",
.long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_HUFFYUV,
.priv_data_size = sizeof(HYuvContext),
.init = decode_init,
.close = decode_end,
.decode = decode_frame,
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
AV_CODEC_CAP_FRAME_THREADS,
};
#if CONFIG_FFVHUFF_DECODER
const AVCodec ff_ffvhuff_decoder = {
.name = "ffvhuff",
.long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_FFVHUFF,
.priv_data_size = sizeof(HYuvContext),
.init = decode_init,
.close = decode_end,
.decode = decode_frame,
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
AV_CODEC_CAP_FRAME_THREADS,
};
#endif /* CONFIG_FFVHUFF_DECODER */
#if CONFIG_HYMT_DECODER
const AVCodec ff_hymt_decoder = {
.name = "hymt",
.long_name = NULL_IF_CONFIG_SMALL("HuffYUV MT"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_HYMT,
.priv_data_size = sizeof(HYuvContext),
.init = decode_init,
.close = decode_end,
.decode = decode_frame,
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
AV_CODEC_CAP_FRAME_THREADS,
};
#endif /* CONFIG_HYMT_DECODER */
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