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FFmpeg/libavcodec/bink.c
Andreas Rheinhardt 20f9727018 avcodec/codec_internal: Add FFCodec, hide internal part of AVCodec 
Up until now, codec.h contains both public and private parts
of AVCodec. This exposes the internals of AVCodec to users
and leads them into the temptation of actually using them
and forces us to forward-declare structures and types that
users can't use at all.

This commit changes this by adding a new structure FFCodec to
codec_internal.h that extends AVCodec, i.e. contains the public
AVCodec as first member; the private fields of AVCodec are moved
to this structure, leaving codec.h clean.

Reviewed-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-03-21 01:33:09 +01:00

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/*
* Bink video decoder
* Copyright (c) 2009 Konstantin Shishkov
* Copyright (C) 2011 Peter Ross <pross@xvid.org>
*
* 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
*/
#include "libavutil/attributes.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/mem_internal.h"
#include "libavutil/thread.h"
#define BITSTREAM_READER_LE
#include "avcodec.h"
#include "binkdata.h"
#include "binkdsp.h"
#include "blockdsp.h"
#include "codec_internal.h"
#include "get_bits.h"
#include "hpeldsp.h"
#include "internal.h"
#include "mathops.h"
#define BINK_FLAG_ALPHA 0x00100000
#define BINK_FLAG_GRAY 0x00020000
static VLC bink_trees[16];
/**
* IDs for different data types used in old version of Bink video codec
*/
enum OldSources {
BINKB_SRC_BLOCK_TYPES = 0, ///< 8x8 block types
BINKB_SRC_COLORS, ///< pixel values used for different block types
BINKB_SRC_PATTERN, ///< 8-bit values for 2-colour pattern fill
BINKB_SRC_X_OFF, ///< X components of motion value
BINKB_SRC_Y_OFF, ///< Y components of motion value
BINKB_SRC_INTRA_DC, ///< DC values for intrablocks with DCT
BINKB_SRC_INTER_DC, ///< DC values for interblocks with DCT
BINKB_SRC_INTRA_Q, ///< quantizer values for intrablocks with DCT
BINKB_SRC_INTER_Q, ///< quantizer values for interblocks with DCT
BINKB_SRC_INTER_COEFS, ///< number of coefficients for residue blocks
BINKB_NB_SRC
};
static const int binkb_bundle_sizes[BINKB_NB_SRC] = {
4, 8, 8, 5, 5, 11, 11, 4, 4, 7
};
static const int binkb_bundle_signed[BINKB_NB_SRC] = {
0, 0, 0, 1, 1, 0, 1, 0, 0, 0
};
static int32_t binkb_intra_quant[16][64];
static int32_t binkb_inter_quant[16][64];
/**
* IDs for different data types used in Bink video codec
*/
enum Sources {
BINK_SRC_BLOCK_TYPES = 0, ///< 8x8 block types
BINK_SRC_SUB_BLOCK_TYPES, ///< 16x16 block types (a subset of 8x8 block types)
BINK_SRC_COLORS, ///< pixel values used for different block types
BINK_SRC_PATTERN, ///< 8-bit values for 2-colour pattern fill
BINK_SRC_X_OFF, ///< X components of motion value
BINK_SRC_Y_OFF, ///< Y components of motion value
BINK_SRC_INTRA_DC, ///< DC values for intrablocks with DCT
BINK_SRC_INTER_DC, ///< DC values for interblocks with DCT
BINK_SRC_RUN, ///< run lengths for special fill block
BINK_NB_SRC
};
/**
* data needed to decode 4-bit Huffman-coded value
*/
typedef struct Tree {
int vlc_num; ///< tree number (in bink_trees[])
uint8_t syms[16]; ///< leaf value to symbol mapping
} Tree;
#define GET_HUFF(gb, tree) (tree).syms[get_vlc2(gb, bink_trees[(tree).vlc_num].table,\
bink_trees[(tree).vlc_num].bits, 1)]
/**
* data structure used for decoding single Bink data type
*/
typedef struct Bundle {
int len; ///< length of number of entries to decode (in bits)
Tree tree; ///< Huffman tree-related data
uint8_t *data; ///< buffer for decoded symbols
uint8_t *data_end; ///< buffer end
uint8_t *cur_dec; ///< pointer to the not yet decoded part of the buffer
uint8_t *cur_ptr; ///< pointer to the data that is not read from buffer yet
} Bundle;
/*
* Decoder context
*/
typedef struct BinkContext {
AVCodecContext *avctx;
BlockDSPContext bdsp;
op_pixels_func put_pixels_tab;
BinkDSPContext binkdsp;
AVFrame *last;
int version; ///< internal Bink file version
int has_alpha;
int swap_planes;
unsigned frame_num;
Bundle bundle[BINKB_NB_SRC]; ///< bundles for decoding all data types
Tree col_high[16]; ///< trees for decoding high nibble in "colours" data type
int col_lastval; ///< value of last decoded high nibble in "colours" data type
} BinkContext;
/**
* Bink video block types
*/
enum BlockTypes {
SKIP_BLOCK = 0, ///< skipped block
SCALED_BLOCK, ///< block has size 16x16
MOTION_BLOCK, ///< block is copied from previous frame with some offset
RUN_BLOCK, ///< block is composed from runs of colours with custom scan order
RESIDUE_BLOCK, ///< motion block with some difference added
INTRA_BLOCK, ///< intra DCT block
FILL_BLOCK, ///< block is filled with single colour
INTER_BLOCK, ///< motion block with DCT applied to the difference
PATTERN_BLOCK, ///< block is filled with two colours following custom pattern
RAW_BLOCK, ///< uncoded 8x8 block
};
/**
* Initialize length in all bundles.
*
* @param c decoder context
* @param width plane width
* @param bw plane width in 8x8 blocks
*/
static void init_lengths(BinkContext *c, int width, int bw)
{
width = FFALIGN(width, 8);
c->bundle[BINK_SRC_BLOCK_TYPES].len = av_log2((width >> 3) + 511) + 1;
c->bundle[BINK_SRC_SUB_BLOCK_TYPES].len = av_log2((width >> 4) + 511) + 1;
c->bundle[BINK_SRC_COLORS].len = av_log2(bw*64 + 511) + 1;
c->bundle[BINK_SRC_INTRA_DC].len =
c->bundle[BINK_SRC_INTER_DC].len =
c->bundle[BINK_SRC_X_OFF].len =
c->bundle[BINK_SRC_Y_OFF].len = av_log2((width >> 3) + 511) + 1;
c->bundle[BINK_SRC_PATTERN].len = av_log2((bw << 3) + 511) + 1;
c->bundle[BINK_SRC_RUN].len = av_log2(bw*48 + 511) + 1;
}
/**
* Allocate memory for bundles.
*
* @param c decoder context
*/
static av_cold int init_bundles(BinkContext *c)
{
int bw, bh, blocks;
uint8_t *tmp;
int i;
bw = (c->avctx->width + 7) >> 3;
bh = (c->avctx->height + 7) >> 3;
blocks = bw * bh;
tmp = av_calloc(blocks, 64 * BINKB_NB_SRC);
if (!tmp)
return AVERROR(ENOMEM);
for (i = 0; i < BINKB_NB_SRC; i++) {
c->bundle[i].data = tmp;
tmp += blocks * 64;
c->bundle[i].data_end = tmp;
}
return 0;
}
/**
* Free memory used by bundles.
*
* @param c decoder context
*/
static av_cold void free_bundles(BinkContext *c)
{
av_freep(&c->bundle[0].data);
}
/**
* Merge two consequent lists of equal size depending on bits read.
*
* @param gb context for reading bits
* @param dst buffer where merged list will be written to
* @param src pointer to the head of the first list (the second lists starts at src+size)
* @param size input lists size
*/
static void merge(GetBitContext *gb, uint8_t *dst, uint8_t *src, int size)
{
uint8_t *src2 = src + size;
int size2 = size;
do {
if (!get_bits1(gb)) {
*dst++ = *src++;
size--;
} else {
*dst++ = *src2++;
size2--;
}
} while (size && size2);
while (size--)
*dst++ = *src++;
while (size2--)
*dst++ = *src2++;
}
/**
* Read information about Huffman tree used to decode data.
*
* @param gb context for reading bits
* @param tree pointer for storing tree data
*/
static int read_tree(GetBitContext *gb, Tree *tree)
{
uint8_t tmp1[16] = { 0 }, tmp2[16], *in = tmp1, *out = tmp2;
int i, t, len;
if (get_bits_left(gb) < 4)
return AVERROR_INVALIDDATA;
tree->vlc_num = get_bits(gb, 4);
if (!tree->vlc_num) {
for (i = 0; i < 16; i++)
tree->syms[i] = i;
return 0;
}
if (get_bits1(gb)) {
len = get_bits(gb, 3);
for (i = 0; i <= len; i++) {
tree->syms[i] = get_bits(gb, 4);
tmp1[tree->syms[i]] = 1;
}
for (i = 0; i < 16 && len < 16 - 1; i++)
if (!tmp1[i])
tree->syms[++len] = i;
} else {
len = get_bits(gb, 2);
for (i = 0; i < 16; i++)
in[i] = i;
for (i = 0; i <= len; i++) {
int size = 1 << i;
for (t = 0; t < 16; t += size << 1)
merge(gb, out + t, in + t, size);
FFSWAP(uint8_t*, in, out);
}
memcpy(tree->syms, in, 16);
}
return 0;
}
/**
* Prepare bundle for decoding data.
*
* @param gb context for reading bits
* @param c decoder context
* @param bundle_num number of the bundle to initialize
*/
static int read_bundle(GetBitContext *gb, BinkContext *c, int bundle_num)
{
int i;
if (bundle_num == BINK_SRC_COLORS) {
for (i = 0; i < 16; i++) {
int ret = read_tree(gb, &c->col_high[i]);
if (ret < 0)
return ret;
}
c->col_lastval = 0;
}
if (bundle_num != BINK_SRC_INTRA_DC && bundle_num != BINK_SRC_INTER_DC) {
int ret = read_tree(gb, &c->bundle[bundle_num].tree);
if (ret < 0)
return ret;
}
c->bundle[bundle_num].cur_dec =
c->bundle[bundle_num].cur_ptr = c->bundle[bundle_num].data;
return 0;
}
/**
* common check before starting decoding bundle data
*
* @param gb context for reading bits
* @param b bundle
* @param t variable where number of elements to decode will be stored
*/
#define CHECK_READ_VAL(gb, b, t) \
if (!b->cur_dec || (b->cur_dec > b->cur_ptr)) \
return 0; \
t = get_bits(gb, b->len); \
if (!t) { \
b->cur_dec = NULL; \
return 0; \
} \
static int read_runs(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
{
int t, v;
const uint8_t *dec_end;
CHECK_READ_VAL(gb, b, t);
dec_end = b->cur_dec + t;
if (dec_end > b->data_end) {
av_log(avctx, AV_LOG_ERROR, "Run value went out of bounds\n");
return AVERROR_INVALIDDATA;
}
if (get_bits_left(gb) < 1)
return AVERROR_INVALIDDATA;
if (get_bits1(gb)) {
v = get_bits(gb, 4);
memset(b->cur_dec, v, t);
b->cur_dec += t;
} else {
while (b->cur_dec < dec_end)
*b->cur_dec++ = GET_HUFF(gb, b->tree);
}
return 0;
}
static int read_motion_values(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
{
int t, sign, v;
const uint8_t *dec_end;
CHECK_READ_VAL(gb, b, t);
dec_end = b->cur_dec + t;
if (dec_end > b->data_end) {
av_log(avctx, AV_LOG_ERROR, "Too many motion values\n");
return AVERROR_INVALIDDATA;
}
if (get_bits_left(gb) < 1)
return AVERROR_INVALIDDATA;
if (get_bits1(gb)) {
v = get_bits(gb, 4);
if (v) {
sign = -get_bits1(gb);
v = (v ^ sign) - sign;
}
memset(b->cur_dec, v, t);
b->cur_dec += t;
} else {
while (b->cur_dec < dec_end) {
v = GET_HUFF(gb, b->tree);
if (v) {
sign = -get_bits1(gb);
v = (v ^ sign) - sign;
}
*b->cur_dec++ = v;
}
}
return 0;
}
static const uint8_t bink_rlelens[4] = { 4, 8, 12, 32 };
static int read_block_types(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
{
BinkContext * const c = avctx->priv_data;
int t, v;
int last = 0;
const uint8_t *dec_end;
CHECK_READ_VAL(gb, b, t);
if (c->version == 'k') {
t ^= 0xBBu;
if (t == 0) {
b->cur_dec = NULL;
return 0;
}
}
dec_end = b->cur_dec + t;
if (dec_end > b->data_end) {
av_log(avctx, AV_LOG_ERROR, "Too many block type values\n");
return AVERROR_INVALIDDATA;
}
if (get_bits_left(gb) < 1)
return AVERROR_INVALIDDATA;
if (get_bits1(gb)) {
v = get_bits(gb, 4);
memset(b->cur_dec, v, t);
b->cur_dec += t;
} else {
while (b->cur_dec < dec_end) {
v = GET_HUFF(gb, b->tree);
if (v < 12) {
last = v;
*b->cur_dec++ = v;
} else {
int run = bink_rlelens[v - 12];
if (dec_end - b->cur_dec < run)
return AVERROR_INVALIDDATA;
memset(b->cur_dec, last, run);
b->cur_dec += run;
}
}
}
return 0;
}
static int read_patterns(AVCodecContext *avctx, GetBitContext *gb, Bundle *b)
{
int t, v;
const uint8_t *dec_end;
CHECK_READ_VAL(gb, b, t);
dec_end = b->cur_dec + t;
if (dec_end > b->data_end) {
av_log(avctx, AV_LOG_ERROR, "Too many pattern values\n");
return AVERROR_INVALIDDATA;
}
while (b->cur_dec < dec_end) {
if (get_bits_left(gb) < 2)
return AVERROR_INVALIDDATA;
v = GET_HUFF(gb, b->tree);
v |= GET_HUFF(gb, b->tree) << 4;
*b->cur_dec++ = v;
}
return 0;
}
static int read_colors(GetBitContext *gb, Bundle *b, BinkContext *c)
{
int t, sign, v;
const uint8_t *dec_end;
CHECK_READ_VAL(gb, b, t);
dec_end = b->cur_dec + t;
if (dec_end > b->data_end) {
av_log(c->avctx, AV_LOG_ERROR, "Too many color values\n");
return AVERROR_INVALIDDATA;
}
if (get_bits_left(gb) < 1)
return AVERROR_INVALIDDATA;
if (get_bits1(gb)) {
c->col_lastval = GET_HUFF(gb, c->col_high[c->col_lastval]);
v = GET_HUFF(gb, b->tree);
v = (c->col_lastval << 4) | v;
if (c->version < 'i') {
sign = ((int8_t) v) >> 7;
v = ((v & 0x7F) ^ sign) - sign;
v += 0x80;
}
memset(b->cur_dec, v, t);
b->cur_dec += t;
} else {
while (b->cur_dec < dec_end) {
if (get_bits_left(gb) < 2)
return AVERROR_INVALIDDATA;
c->col_lastval = GET_HUFF(gb, c->col_high[c->col_lastval]);
v = GET_HUFF(gb, b->tree);
v = (c->col_lastval << 4) | v;
if (c->version < 'i') {
sign = ((int8_t) v) >> 7;
v = ((v & 0x7F) ^ sign) - sign;
v += 0x80;
}
*b->cur_dec++ = v;
}
}
return 0;
}
/** number of bits used to store first DC value in bundle */
#define DC_START_BITS 11
static int read_dcs(AVCodecContext *avctx, GetBitContext *gb, Bundle *b,
int start_bits, int has_sign)
{
int i, j, len, len2, bsize, sign, v, v2;
int16_t *dst = (int16_t*)b->cur_dec;
int16_t *dst_end = (int16_t*)b->data_end;
CHECK_READ_VAL(gb, b, len);
if (get_bits_left(gb) < start_bits - has_sign)
return AVERROR_INVALIDDATA;
v = get_bits(gb, start_bits - has_sign);
if (v && has_sign) {
sign = -get_bits1(gb);
v = (v ^ sign) - sign;
}
if (dst_end - dst < 1)
return AVERROR_INVALIDDATA;
*dst++ = v;
len--;
for (i = 0; i < len; i += 8) {
len2 = FFMIN(len - i, 8);
if (dst_end - dst < len2)
return AVERROR_INVALIDDATA;
bsize = get_bits(gb, 4);
if (bsize) {
for (j = 0; j < len2; j++) {
v2 = get_bits(gb, bsize);
if (v2) {
sign = -get_bits1(gb);
v2 = (v2 ^ sign) - sign;
}
v += v2;
*dst++ = v;
if (v < -32768 || v > 32767) {
av_log(avctx, AV_LOG_ERROR, "DC value went out of bounds: %d\n", v);
return AVERROR_INVALIDDATA;
}
}
} else {
for (j = 0; j < len2; j++)
*dst++ = v;
}
}
b->cur_dec = (uint8_t*)dst;
return 0;
}
/**
* Retrieve next value from bundle.
*
* @param c decoder context
* @param bundle bundle number
*/
static inline int get_value(BinkContext *c, int bundle)
{
int ret;
if (bundle < BINK_SRC_X_OFF || bundle == BINK_SRC_RUN)
return *c->bundle[bundle].cur_ptr++;
if (bundle == BINK_SRC_X_OFF || bundle == BINK_SRC_Y_OFF)
return (int8_t)*c->bundle[bundle].cur_ptr++;
ret = *(int16_t*)c->bundle[bundle].cur_ptr;
c->bundle[bundle].cur_ptr += 2;
return ret;
}
static av_cold void binkb_init_bundle(BinkContext *c, int bundle_num)
{
c->bundle[bundle_num].cur_dec =
c->bundle[bundle_num].cur_ptr = c->bundle[bundle_num].data;
c->bundle[bundle_num].len = 13;
}
static av_cold void binkb_init_bundles(BinkContext *c)
{
int i;
for (i = 0; i < BINKB_NB_SRC; i++)
binkb_init_bundle(c, i);
}
static int binkb_read_bundle(BinkContext *c, GetBitContext *gb, int bundle_num)
{
const int bits = binkb_bundle_sizes[bundle_num];
const int mask = 1 << (bits - 1);
const int issigned = binkb_bundle_signed[bundle_num];
Bundle *b = &c->bundle[bundle_num];
int i, len;
CHECK_READ_VAL(gb, b, len);
if (b->data_end - b->cur_dec < len * (1 + (bits > 8)))
return AVERROR_INVALIDDATA;
if (bits <= 8) {
if (!issigned) {
for (i = 0; i < len; i++)
*b->cur_dec++ = get_bits(gb, bits);
} else {
for (i = 0; i < len; i++)
*b->cur_dec++ = get_bits(gb, bits) - mask;
}
} else {
int16_t *dst = (int16_t*)b->cur_dec;
if (!issigned) {
for (i = 0; i < len; i++)
*dst++ = get_bits(gb, bits);
} else {
for (i = 0; i < len; i++)
*dst++ = get_bits(gb, bits) - mask;
}
b->cur_dec = (uint8_t*)dst;
}
return 0;
}
static inline int binkb_get_value(BinkContext *c, int bundle_num)
{
int16_t ret;
const int bits = binkb_bundle_sizes[bundle_num];
if (bits <= 8) {
int val = *c->bundle[bundle_num].cur_ptr++;
return binkb_bundle_signed[bundle_num] ? (int8_t)val : val;
}
ret = *(int16_t*)c->bundle[bundle_num].cur_ptr;
c->bundle[bundle_num].cur_ptr += 2;
return ret;
}
/**
* Read 8x8 block of DCT coefficients.
*
* @param gb context for reading bits
* @param block place for storing coefficients
* @param scan scan order table
* @param quant_matrices quantization matrices
* @return 0 for success, negative value in other cases
*/
static int read_dct_coeffs(BinkContext *c, GetBitContext *gb, int32_t block[64],
const uint8_t *scan, int *coef_count_,
int coef_idx[64], int q)
{
int coef_list[128];
int mode_list[128];
int i, t, bits, ccoef, mode, sign;
int list_start = 64, list_end = 64, list_pos;
int coef_count = 0;
int quant_idx;
if (get_bits_left(gb) < 4)
return AVERROR_INVALIDDATA;
coef_list[list_end] = 4; mode_list[list_end++] = 0;
coef_list[list_end] = 24; mode_list[list_end++] = 0;
coef_list[list_end] = 44; mode_list[list_end++] = 0;
coef_list[list_end] = 1; mode_list[list_end++] = 3;
coef_list[list_end] = 2; mode_list[list_end++] = 3;
coef_list[list_end] = 3; mode_list[list_end++] = 3;
for (bits = get_bits(gb, 4) - 1; bits >= 0; bits--) {
list_pos = list_start;
while (list_pos < list_end) {
if (!(mode_list[list_pos] | coef_list[list_pos]) || !get_bits1(gb)) {
list_pos++;
continue;
}
ccoef = coef_list[list_pos];
mode = mode_list[list_pos];
switch (mode) {
case 0:
coef_list[list_pos] = ccoef + 4;
mode_list[list_pos] = 1;
case 2:
if (mode == 2) {
coef_list[list_pos] = 0;
mode_list[list_pos++] = 0;
}
for (i = 0; i < 4; i++, ccoef++) {
if (get_bits1(gb)) {
coef_list[--list_start] = ccoef;
mode_list[ list_start] = 3;
} else {
if (!bits) {
t = 1 - (get_bits1(gb) << 1);
} else {
t = get_bits(gb, bits) | 1 << bits;
sign = -get_bits1(gb);
t = (t ^ sign) - sign;
}
block[scan[ccoef]] = t;
coef_idx[coef_count++] = ccoef;
}
}
break;
case 1:
mode_list[list_pos] = 2;
for (i = 0; i < 3; i++) {
ccoef += 4;
coef_list[list_end] = ccoef;
mode_list[list_end++] = 2;
}
break;
case 3:
if (!bits) {
t = 1 - (get_bits1(gb) << 1);
} else {
t = get_bits(gb, bits) | 1 << bits;
sign = -get_bits1(gb);
t = (t ^ sign) - sign;
}
block[scan[ccoef]] = t;
coef_idx[coef_count++] = ccoef;
coef_list[list_pos] = 0;
mode_list[list_pos++] = 0;
break;
}
}
}
if (q == -1) {
quant_idx = get_bits(gb, 4);
} else {
quant_idx = q;
if (quant_idx > 15U) {
av_log(c->avctx, AV_LOG_ERROR, "quant_index %d out of range\n", quant_idx);
return AVERROR_INVALIDDATA;
}
}
*coef_count_ = coef_count;
return quant_idx;
}
static void unquantize_dct_coeffs(int32_t block[64], const uint32_t quant[64],
int coef_count, int coef_idx[64],
const uint8_t *scan)
{
int i;
block[0] = (int)(block[0] * quant[0]) >> 11;
for (i = 0; i < coef_count; i++) {
int idx = coef_idx[i];
block[scan[idx]] = (int)(block[scan[idx]] * quant[idx]) >> 11;
}
}
/**
* Read 8x8 block with residue after motion compensation.
*
* @param gb context for reading bits
* @param block place to store read data
* @param masks_count number of masks to decode
* @return 0 on success, negative value in other cases
*/
static int read_residue(GetBitContext *gb, int16_t block[64], int masks_count)
{
int coef_list[128];
int mode_list[128];
int i, sign, mask, ccoef, mode;
int list_start = 64, list_end = 64, list_pos;
int nz_coeff[64];
int nz_coeff_count = 0;
coef_list[list_end] = 4; mode_list[list_end++] = 0;
coef_list[list_end] = 24; mode_list[list_end++] = 0;
coef_list[list_end] = 44; mode_list[list_end++] = 0;
coef_list[list_end] = 0; mode_list[list_end++] = 2;
for (mask = 1 << get_bits(gb, 3); mask; mask >>= 1) {
for (i = 0; i < nz_coeff_count; i++) {
if (!get_bits1(gb))
continue;
if (block[nz_coeff[i]] < 0)
block[nz_coeff[i]] -= mask;
else
block[nz_coeff[i]] += mask;
masks_count--;
if (masks_count < 0)
return 0;
}
list_pos = list_start;
while (list_pos < list_end) {
if (!(coef_list[list_pos] | mode_list[list_pos]) || !get_bits1(gb)) {
list_pos++;
continue;
}
ccoef = coef_list[list_pos];
mode = mode_list[list_pos];
switch (mode) {
case 0:
coef_list[list_pos] = ccoef + 4;
mode_list[list_pos] = 1;
case 2:
if (mode == 2) {
coef_list[list_pos] = 0;
mode_list[list_pos++] = 0;
}
for (i = 0; i < 4; i++, ccoef++) {
if (get_bits1(gb)) {
coef_list[--list_start] = ccoef;
mode_list[ list_start] = 3;
} else {
nz_coeff[nz_coeff_count++] = bink_scan[ccoef];
sign = -get_bits1(gb);
block[bink_scan[ccoef]] = (mask ^ sign) - sign;
masks_count--;
if (masks_count < 0)
return 0;
}
}
break;
case 1:
mode_list[list_pos] = 2;
for (i = 0; i < 3; i++) {
ccoef += 4;
coef_list[list_end] = ccoef;
mode_list[list_end++] = 2;
}
break;
case 3:
nz_coeff[nz_coeff_count++] = bink_scan[ccoef];
sign = -get_bits1(gb);
block[bink_scan[ccoef]] = (mask ^ sign) - sign;
coef_list[list_pos] = 0;
mode_list[list_pos++] = 0;
masks_count--;
if (masks_count < 0)
return 0;
break;
}
}
}
return 0;
}
/**
* Copy 8x8 block from source to destination, where src and dst may be overlapped
*/
static inline void put_pixels8x8_overlapped(uint8_t *dst, uint8_t *src, int stride)
{
uint8_t tmp[64];
int i;
for (i = 0; i < 8; i++)
memcpy(tmp + i*8, src + i*stride, 8);
for (i = 0; i < 8; i++)
memcpy(dst + i*stride, tmp + i*8, 8);
}
static int binkb_decode_plane(BinkContext *c, AVFrame *frame, GetBitContext *gb,
int plane_idx, int is_key, int is_chroma)
{
int blk, ret;
int i, j, bx, by;
uint8_t *dst, *ref, *ref_start, *ref_end;
int v, col[2];
const uint8_t *scan;
int xoff, yoff;
LOCAL_ALIGNED_32(int16_t, block, [64]);
LOCAL_ALIGNED_16(int32_t, dctblock, [64]);
int coordmap[64];
int ybias = is_key ? -15 : 0;
int qp, quant_idx, coef_count, coef_idx[64];
const int stride = frame->linesize[plane_idx];
int bw = is_chroma ? (c->avctx->width + 15) >> 4 : (c->avctx->width + 7) >> 3;
int bh = is_chroma ? (c->avctx->height + 15) >> 4 : (c->avctx->height + 7) >> 3;
binkb_init_bundles(c);
ref_start = frame->data[plane_idx];
ref_end = frame->data[plane_idx] + (bh * frame->linesize[plane_idx] + bw) * 8;
for (i = 0; i < 64; i++)
coordmap[i] = (i & 7) + (i >> 3) * stride;
for (by = 0; by < bh; by++) {
for (i = 0; i < BINKB_NB_SRC; i++) {
if ((ret = binkb_read_bundle(c, gb, i)) < 0)
return ret;
}
dst = frame->data[plane_idx] + 8*by*stride;
for (bx = 0; bx < bw; bx++, dst += 8) {
blk = binkb_get_value(c, BINKB_SRC_BLOCK_TYPES);
switch (blk) {
case 0:
break;
case 1:
scan = bink_patterns[get_bits(gb, 4)];
i = 0;
do {
int mode, run;
mode = get_bits1(gb);
run = get_bits(gb, binkb_runbits[i]) + 1;
i += run;
if (i > 64) {
av_log(c->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
return AVERROR_INVALIDDATA;
}
if (mode) {
v = binkb_get_value(c, BINKB_SRC_COLORS);
for (j = 0; j < run; j++)
dst[coordmap[*scan++]] = v;
} else {
for (j = 0; j < run; j++)
dst[coordmap[*scan++]] = binkb_get_value(c, BINKB_SRC_COLORS);
}
} while (i < 63);
if (i == 63)
dst[coordmap[*scan++]] = binkb_get_value(c, BINKB_SRC_COLORS);
break;
case 2:
memset(dctblock, 0, sizeof(*dctblock) * 64);
dctblock[0] = binkb_get_value(c, BINKB_SRC_INTRA_DC);
qp = binkb_get_value(c, BINKB_SRC_INTRA_Q);
if ((quant_idx = read_dct_coeffs(c, gb, dctblock, bink_scan, &coef_count, coef_idx, qp)) < 0)
return quant_idx;
unquantize_dct_coeffs(dctblock, binkb_intra_quant[quant_idx], coef_count, coef_idx, bink_scan);
c->binkdsp.idct_put(dst, stride, dctblock);
break;
case 3:
xoff = binkb_get_value(c, BINKB_SRC_X_OFF);
yoff = binkb_get_value(c, BINKB_SRC_Y_OFF) + ybias;
ref = dst + xoff + yoff * stride;
if (ref < ref_start || ref + 8*stride > ref_end) {
av_log(c->avctx, AV_LOG_WARNING, "Reference block is out of bounds\n");
} else if (ref + 8*stride < dst || ref >= dst + 8*stride) {
c->put_pixels_tab(dst, ref, stride, 8);
} else {
put_pixels8x8_overlapped(dst, ref, stride);
}
c->bdsp.clear_block(block);
v = binkb_get_value(c, BINKB_SRC_INTER_COEFS);
read_residue(gb, block, v);
c->binkdsp.add_pixels8(dst, block, stride);
break;
case 4:
xoff = binkb_get_value(c, BINKB_SRC_X_OFF);
yoff = binkb_get_value(c, BINKB_SRC_Y_OFF) + ybias;
ref = dst + xoff + yoff * stride;
if (ref < ref_start || ref + 8 * stride > ref_end) {
av_log(c->avctx, AV_LOG_WARNING, "Reference block is out of bounds\n");
} else if (ref + 8*stride < dst || ref >= dst + 8*stride) {
c->put_pixels_tab(dst, ref, stride, 8);
} else {
put_pixels8x8_overlapped(dst, ref, stride);
}
memset(dctblock, 0, sizeof(*dctblock) * 64);
dctblock[0] = binkb_get_value(c, BINKB_SRC_INTER_DC);
qp = binkb_get_value(c, BINKB_SRC_INTER_Q);
if ((quant_idx = read_dct_coeffs(c, gb, dctblock, bink_scan, &coef_count, coef_idx, qp)) < 0)
return quant_idx;
unquantize_dct_coeffs(dctblock, binkb_inter_quant[quant_idx], coef_count, coef_idx, bink_scan);
c->binkdsp.idct_add(dst, stride, dctblock);
break;
case 5:
v = binkb_get_value(c, BINKB_SRC_COLORS);
c->bdsp.fill_block_tab[1](dst, v, stride, 8);
break;
case 6:
for (i = 0; i < 2; i++)
col[i] = binkb_get_value(c, BINKB_SRC_COLORS);
for (i = 0; i < 8; i++) {
v = binkb_get_value(c, BINKB_SRC_PATTERN);
for (j = 0; j < 8; j++, v >>= 1)
dst[i*stride + j] = col[v & 1];
}
break;
case 7:
xoff = binkb_get_value(c, BINKB_SRC_X_OFF);
yoff = binkb_get_value(c, BINKB_SRC_Y_OFF) + ybias;
ref = dst + xoff + yoff * stride;
if (ref < ref_start || ref + 8 * stride > ref_end) {
av_log(c->avctx, AV_LOG_WARNING, "Reference block is out of bounds\n");
} else if (ref + 8*stride < dst || ref >= dst + 8*stride) {
c->put_pixels_tab(dst, ref, stride, 8);
} else {
put_pixels8x8_overlapped(dst, ref, stride);
}
break;
case 8:
for (i = 0; i < 8; i++)
memcpy(dst + i*stride, c->bundle[BINKB_SRC_COLORS].cur_ptr + i*8, 8);
c->bundle[BINKB_SRC_COLORS].cur_ptr += 64;
break;
default:
av_log(c->avctx, AV_LOG_ERROR, "Unknown block type %d\n", blk);
return AVERROR_INVALIDDATA;
}
}
}
if (get_bits_count(gb) & 0x1F) //next plane data starts at 32-bit boundary
skip_bits_long(gb, 32 - (get_bits_count(gb) & 0x1F));
return 0;
}
static int bink_put_pixels(BinkContext *c,
uint8_t *dst, uint8_t *prev, int stride,
uint8_t *ref_start,
uint8_t *ref_end)
{
int xoff = get_value(c, BINK_SRC_X_OFF);
int yoff = get_value(c, BINK_SRC_Y_OFF);
uint8_t *ref = prev + xoff + yoff * stride;
if (ref < ref_start || ref > ref_end) {
av_log(c->avctx, AV_LOG_ERROR, "Copy out of bounds @%d, %d\n",
xoff, yoff);
return AVERROR_INVALIDDATA;
}
c->put_pixels_tab(dst, ref, stride, 8);
return 0;
}
static int bink_decode_plane(BinkContext *c, AVFrame *frame, GetBitContext *gb,
int plane_idx, int is_chroma)
{
int blk, ret;
int i, j, bx, by;
uint8_t *dst, *prev, *ref_start, *ref_end;
int v, col[2];
const uint8_t *scan;
LOCAL_ALIGNED_32(int16_t, block, [64]);
LOCAL_ALIGNED_16(uint8_t, ublock, [64]);
LOCAL_ALIGNED_16(int32_t, dctblock, [64]);
int coordmap[64], quant_idx, coef_count, coef_idx[64];
const int stride = frame->linesize[plane_idx];
int bw = is_chroma ? (c->avctx->width + 15) >> 4 : (c->avctx->width + 7) >> 3;
int bh = is_chroma ? (c->avctx->height + 15) >> 4 : (c->avctx->height + 7) >> 3;
int width = c->avctx->width >> is_chroma;
int height = c->avctx->height >> is_chroma;
if (c->version == 'k' && get_bits1(gb)) {
int fill = get_bits(gb, 8);
dst = frame->data[plane_idx];
for (i = 0; i < height; i++)
memset(dst + i * stride, fill, width);
goto end;
}
init_lengths(c, FFMAX(width, 8), bw);
for (i = 0; i < BINK_NB_SRC; i++) {
ret = read_bundle(gb, c, i);
if (ret < 0)
return ret;
}
ref_start = c->last->data[plane_idx] ? c->last->data[plane_idx]
: frame->data[plane_idx];
ref_end = ref_start
+ (bw - 1 + c->last->linesize[plane_idx] * (bh - 1)) * 8;
for (i = 0; i < 64; i++)
coordmap[i] = (i & 7) + (i >> 3) * stride;
for (by = 0; by < bh; by++) {
if ((ret = read_block_types(c->avctx, gb, &c->bundle[BINK_SRC_BLOCK_TYPES])) < 0)
return ret;
if ((ret = read_block_types(c->avctx, gb, &c->bundle[BINK_SRC_SUB_BLOCK_TYPES])) < 0)
return ret;
if ((ret = read_colors(gb, &c->bundle[BINK_SRC_COLORS], c)) < 0)
return ret;
if ((ret = read_patterns(c->avctx, gb, &c->bundle[BINK_SRC_PATTERN])) < 0)
return ret;
if ((ret = read_motion_values(c->avctx, gb, &c->bundle[BINK_SRC_X_OFF])) < 0)
return ret;
if ((ret = read_motion_values(c->avctx, gb, &c->bundle[BINK_SRC_Y_OFF])) < 0)
return ret;
if ((ret = read_dcs(c->avctx, gb, &c->bundle[BINK_SRC_INTRA_DC], DC_START_BITS, 0)) < 0)
return ret;
if ((ret = read_dcs(c->avctx, gb, &c->bundle[BINK_SRC_INTER_DC], DC_START_BITS, 1)) < 0)
return ret;
if ((ret = read_runs(c->avctx, gb, &c->bundle[BINK_SRC_RUN])) < 0)
return ret;
dst = frame->data[plane_idx] + 8*by*stride;
prev = (c->last->data[plane_idx] ? c->last->data[plane_idx]
: frame->data[plane_idx]) + 8*by*stride;
for (bx = 0; bx < bw; bx++, dst += 8, prev += 8) {
blk = get_value(c, BINK_SRC_BLOCK_TYPES);
// 16x16 block type on odd line means part of the already decoded block, so skip it
if ((by & 1) && blk == SCALED_BLOCK) {
bx++;
dst += 8;
prev += 8;
continue;
}
switch (blk) {
case SKIP_BLOCK:
c->put_pixels_tab(dst, prev, stride, 8);
break;
case SCALED_BLOCK:
blk = get_value(c, BINK_SRC_SUB_BLOCK_TYPES);
switch (blk) {
case RUN_BLOCK:
if (get_bits_left(gb) < 4)
return AVERROR_INVALIDDATA;
scan = bink_patterns[get_bits(gb, 4)];
i = 0;
do {
int run = get_value(c, BINK_SRC_RUN) + 1;
i += run;
if (i > 64) {
av_log(c->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
return AVERROR_INVALIDDATA;
}
if (get_bits1(gb)) {
v = get_value(c, BINK_SRC_COLORS);
for (j = 0; j < run; j++)
ublock[*scan++] = v;
} else {
for (j = 0; j < run; j++)
ublock[*scan++] = get_value(c, BINK_SRC_COLORS);
}
} while (i < 63);
if (i == 63)
ublock[*scan++] = get_value(c, BINK_SRC_COLORS);
break;
case INTRA_BLOCK:
memset(dctblock, 0, sizeof(*dctblock) * 64);
dctblock[0] = get_value(c, BINK_SRC_INTRA_DC);
if ((quant_idx = read_dct_coeffs(c, gb, dctblock, bink_scan, &coef_count, coef_idx, -1)) < 0)
return quant_idx;
unquantize_dct_coeffs(dctblock, bink_intra_quant[quant_idx], coef_count, coef_idx, bink_scan);
c->binkdsp.idct_put(ublock, 8, dctblock);
break;
case FILL_BLOCK:
v = get_value(c, BINK_SRC_COLORS);
c->bdsp.fill_block_tab[0](dst, v, stride, 16);
break;
case PATTERN_BLOCK:
for (i = 0; i < 2; i++)
col[i] = get_value(c, BINK_SRC_COLORS);
for (j = 0; j < 8; j++) {
v = get_value(c, BINK_SRC_PATTERN);
for (i = 0; i < 8; i++, v >>= 1)
ublock[i + j*8] = col[v & 1];
}
break;
case RAW_BLOCK:
for (j = 0; j < 8; j++)
for (i = 0; i < 8; i++)
ublock[i + j*8] = get_value(c, BINK_SRC_COLORS);
break;
default:
av_log(c->avctx, AV_LOG_ERROR, "Incorrect 16x16 block type %d\n", blk);
return AVERROR_INVALIDDATA;
}
if (blk != FILL_BLOCK)
c->binkdsp.scale_block(ublock, dst, stride);
bx++;
dst += 8;
prev += 8;
break;
case MOTION_BLOCK:
ret = bink_put_pixels(c, dst, prev, stride,
ref_start, ref_end);
if (ret < 0)
return ret;
break;
case RUN_BLOCK:
scan = bink_patterns[get_bits(gb, 4)];
i = 0;
do {
int run = get_value(c, BINK_SRC_RUN) + 1;
i += run;
if (i > 64) {
av_log(c->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
return AVERROR_INVALIDDATA;
}
if (get_bits1(gb)) {
v = get_value(c, BINK_SRC_COLORS);
for (j = 0; j < run; j++)
dst[coordmap[*scan++]] = v;
} else {
for (j = 0; j < run; j++)
dst[coordmap[*scan++]] = get_value(c, BINK_SRC_COLORS);
}
} while (i < 63);
if (i == 63)
dst[coordmap[*scan++]] = get_value(c, BINK_SRC_COLORS);
break;
case RESIDUE_BLOCK:
ret = bink_put_pixels(c, dst, prev, stride,
ref_start, ref_end);
if (ret < 0)
return ret;
c->bdsp.clear_block(block);
v = get_bits(gb, 7);
read_residue(gb, block, v);
c->binkdsp.add_pixels8(dst, block, stride);
break;
case INTRA_BLOCK:
memset(dctblock, 0, sizeof(*dctblock) * 64);
dctblock[0] = get_value(c, BINK_SRC_INTRA_DC);
if ((quant_idx = read_dct_coeffs(c, gb, dctblock, bink_scan, &coef_count, coef_idx, -1)) < 0)
return quant_idx;
unquantize_dct_coeffs(dctblock, bink_intra_quant[quant_idx], coef_count, coef_idx, bink_scan);
c->binkdsp.idct_put(dst, stride, dctblock);
break;
case FILL_BLOCK:
v = get_value(c, BINK_SRC_COLORS);
c->bdsp.fill_block_tab[1](dst, v, stride, 8);
break;
case INTER_BLOCK:
ret = bink_put_pixels(c, dst, prev, stride,
ref_start, ref_end);
if (ret < 0)
return ret;
memset(dctblock, 0, sizeof(*dctblock) * 64);
dctblock[0] = get_value(c, BINK_SRC_INTER_DC);
if ((quant_idx = read_dct_coeffs(c, gb, dctblock, bink_scan, &coef_count, coef_idx, -1)) < 0)
return quant_idx;
unquantize_dct_coeffs(dctblock, bink_inter_quant[quant_idx], coef_count, coef_idx, bink_scan);
c->binkdsp.idct_add(dst, stride, dctblock);
break;
case PATTERN_BLOCK:
for (i = 0; i < 2; i++)
col[i] = get_value(c, BINK_SRC_COLORS);
for (i = 0; i < 8; i++) {
v = get_value(c, BINK_SRC_PATTERN);
for (j = 0; j < 8; j++, v >>= 1)
dst[i*stride + j] = col[v & 1];
}
break;
case RAW_BLOCK:
for (i = 0; i < 8; i++)
memcpy(dst + i*stride, c->bundle[BINK_SRC_COLORS].cur_ptr + i*8, 8);
c->bundle[BINK_SRC_COLORS].cur_ptr += 64;
break;
default:
av_log(c->avctx, AV_LOG_ERROR, "Unknown block type %d\n", blk);
return AVERROR_INVALIDDATA;
}
}
}
end:
if (get_bits_count(gb) & 0x1F) //next plane data starts at 32-bit boundary
skip_bits_long(gb, 32 - (get_bits_count(gb) & 0x1F));
return 0;
}
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *pkt)
{
BinkContext * const c = avctx->priv_data;
AVFrame *frame = data;
GetBitContext gb;
int plane, plane_idx, ret;
int bits_count = pkt->size << 3;
if (c->version > 'b') {
if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)
return ret;
} else {
if ((ret = ff_reget_buffer(avctx, c->last, 0)) < 0)
return ret;
if ((ret = av_frame_ref(frame, c->last)) < 0)
return ret;
}
init_get_bits(&gb, pkt->data, bits_count);
if (c->has_alpha) {
if (c->version >= 'i')
skip_bits_long(&gb, 32);
if ((ret = bink_decode_plane(c, frame, &gb, 3, 0)) < 0)
return ret;
}
if (c->version >= 'i')
skip_bits_long(&gb, 32);
c->frame_num++;
for (plane = 0; plane < 3; plane++) {
plane_idx = (!plane || !c->swap_planes) ? plane : (plane ^ 3);
if (c->version > 'b') {
if ((ret = bink_decode_plane(c, frame, &gb, plane_idx, !!plane)) < 0)
return ret;
} else {
if ((ret = binkb_decode_plane(c, frame, &gb, plane_idx,
c->frame_num == 1, !!plane)) < 0)
return ret;
}
if (get_bits_count(&gb) >= bits_count)
break;
}
emms_c();
if (c->version > 'b') {
av_frame_unref(c->last);
if ((ret = av_frame_ref(c->last, frame)) < 0)
return ret;
}
*got_frame = 1;
/* always report that the buffer was completely consumed */
return pkt->size;
}
static av_cold void bink_init_vlcs(void)
{
for (int i = 0, offset = 0; i < 16; i++) {
static VLC_TYPE table[976][2];
const int maxbits = bink_tree_lens[i][15];
bink_trees[i].table = table + offset;
bink_trees[i].table_allocated = 1 << maxbits;
offset += bink_trees[i].table_allocated;
init_vlc(&bink_trees[i], maxbits, 16,
bink_tree_lens[i], 1, 1,
bink_tree_bits[i], 1, 1, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
}
}
/**
* Calculate quantization tables for version b
*/
static av_cold void binkb_calc_quant(void)
{
uint8_t inv_bink_scan[64];
static const int s[64]={
1073741824,1489322693,1402911301,1262586814,1073741824, 843633538, 581104888, 296244703,
1489322693,2065749918,1945893874,1751258219,1489322693,1170153332, 806015634, 410903207,
1402911301,1945893874,1832991949,1649649171,1402911301,1102260336, 759250125, 387062357,
1262586814,1751258219,1649649171,1484645031,1262586814, 992008094, 683307060, 348346918,
1073741824,1489322693,1402911301,1262586814,1073741824, 843633538, 581104888, 296244703,
843633538,1170153332,1102260336, 992008094, 843633538, 662838617, 456571181, 232757969,
581104888, 806015634, 759250125, 683307060, 581104888, 456571181, 314491699, 160326478,
296244703, 410903207, 387062357, 348346918, 296244703, 232757969, 160326478, 81733730,
};
int i, j;
#define C (1LL<<30)
for (i = 0; i < 64; i++)
inv_bink_scan[bink_scan[i]] = i;
for (j = 0; j < 16; j++) {
for (i = 0; i < 64; i++) {
int k = inv_bink_scan[i];
binkb_intra_quant[j][k] = binkb_intra_seed[i] * (int64_t)s[i] *
binkb_num[j]/(binkb_den[j] * (C>>12));
binkb_inter_quant[j][k] = binkb_inter_seed[i] * (int64_t)s[i] *
binkb_num[j]/(binkb_den[j] * (C>>12));
}
}
}
static av_cold int decode_init(AVCodecContext *avctx)
{
static AVOnce init_static_once = AV_ONCE_INIT;
BinkContext * const c = avctx->priv_data;
HpelDSPContext hdsp;
int ret;
int flags;
c->version = avctx->codec_tag >> 24;
if (avctx->extradata_size < 4) {
av_log(avctx, AV_LOG_ERROR, "Extradata missing or too short\n");
return AVERROR_INVALIDDATA;
}
flags = AV_RL32(avctx->extradata);
c->has_alpha = flags & BINK_FLAG_ALPHA;
c->swap_planes = c->version >= 'h';
c->avctx = avctx;
if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
return ret;
c->last = av_frame_alloc();
if (!c->last)
return AVERROR(ENOMEM);
avctx->pix_fmt = c->has_alpha ? AV_PIX_FMT_YUVA420P : AV_PIX_FMT_YUV420P;
avctx->color_range = c->version == 'k' ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
ff_blockdsp_init(&c->bdsp, avctx);
ff_hpeldsp_init(&hdsp, avctx->flags);
c->put_pixels_tab = hdsp.put_pixels_tab[1][0];
ff_binkdsp_init(&c->binkdsp);
if ((ret = init_bundles(c)) < 0)
return ret;
if (c->version == 'b') {
static AVOnce binkb_init_once = AV_ONCE_INIT;
ff_thread_once(&binkb_init_once, binkb_calc_quant);
}
ff_thread_once(&init_static_once, bink_init_vlcs);
return 0;
}
static av_cold int decode_end(AVCodecContext *avctx)
{
BinkContext * const c = avctx->priv_data;
av_frame_free(&c->last);
free_bundles(c);
return 0;
}
static void flush(AVCodecContext *avctx)
{
BinkContext * const c = avctx->priv_data;
c->frame_num = 0;
}
const FFCodec ff_bink_decoder = {
.p.name = "binkvideo",
.p.long_name = NULL_IF_CONFIG_SMALL("Bink video"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_BINKVIDEO,
.priv_data_size = sizeof(BinkContext),
.init = decode_init,
.close = decode_end,
.decode = decode_frame,
.flush = flush,
.p.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
};
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