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avcodec/clearvideo: add inter-frame decoding 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2018-03-31 11:48:30 +02:00
parent 8c2c97403b
commit a874586994
2 changed files with 2438 additions and 100 deletions
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709
libavcodec/clearvideo.c
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@ -1,6 +1,6 @@
/*
* ClearVideo decoder
* Copyright (c) 2012 Konstantin Shishkov
* Copyright (c) 2012-2018 Konstantin Shishkov
*
* This file is part of FFmpeg.
*
@ -29,107 +29,55 @@
#include "get_bits.h"
#include "idctdsp.h"
#include "internal.h"
#include "mathops.h"
#include "clearvideodata.h"
#define NUM_DC_CODES 127
#define NUM_AC_CODES 103
typedef struct LevelCodes {
uint16_t mv_esc;
uint16_t bias_esc;
VLC flags_cb;
VLC mv_cb;
VLC bias_cb;
} LevelCodes;
static const uint8_t clv_dc_codes[NUM_DC_CODES] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x10, 0x11, 0x12, 0x13, 0x13, 0x14, 0x07, 0x0B,
0x0C, 0x08, 0x08, 0x09, 0x04, 0x06, 0x07, 0x05,
0x04, 0x05, 0x04, 0x06, 0x05, 0x06, 0x07, 0x05,
0x06, 0x07, 0x06, 0x07, 0x08, 0x06, 0x07, 0x08,
0x09, 0x0A, 0x0B, 0x07, 0x08, 0x09, 0x07, 0x08,
0x06, 0x07, 0x08, 0x06, 0x04, 0x05, 0x02, 0x01,
0x03, 0x06, 0x07, 0x07, 0x09, 0x0A, 0x0B, 0x09,
0x0A, 0x0B, 0x0A, 0x0B, 0x0C, 0x0D, 0x0C, 0x09,
0x0D, 0x0A, 0x0B, 0x08, 0x09, 0x0A, 0x0B, 0x07,
0x08, 0x09, 0x0A, 0x0B, 0x06, 0x07, 0x06, 0x08,
0x07, 0x09, 0x0A, 0x0B, 0x09, 0x0A, 0x0B, 0x0C,
0x14, 0x0D, 0x0D, 0x0E, 0x0F, 0x15, 0x15, 0x16,
0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E,
0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25,
};
typedef struct MV {
int16_t x, y;
} MV;
static const uint8_t clv_dc_bits[NUM_DC_CODES] = {
22, 22, 22, 22, 22, 22, 22, 22,
22, 22, 22, 22, 22, 22, 22, 22,
22, 22, 22, 21, 22, 22, 19, 20,
20, 19, 18, 18, 15, 17, 17, 16,
14, 15, 12, 13, 14, 14, 14, 12,
12, 12, 11, 11, 11, 10, 10, 10,
10, 10, 10, 9, 9, 9, 8, 8,
7, 7, 7, 6, 5, 5, 3, 1,
3, 5, 5, 6, 7, 7, 7, 8,
8, 8, 9, 9, 9, 9, 10, 11,
10, 11, 11, 12, 12, 12, 12, 13,
14, 14, 14, 14, 15, 15, 16, 17,
16, 17, 18, 18, 19, 19, 19, 19,
21, 19, 20, 19, 19, 21, 22, 22,
22, 22, 22, 22, 22, 22, 22, 22,
22, 22, 22, 22, 22, 22, 22,
};
static const MV zero_mv = { 0 };
static const uint16_t clv_ac_syms[NUM_AC_CODES] = {
0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008,
0x0009, 0x000A, 0x000B, 0x000C, 0x0011, 0x0012, 0x0013, 0x0014,
0x0015, 0x0016, 0x0021, 0x0022, 0x0023, 0x0024, 0x0031, 0x0032,
0x0033, 0x0041, 0x0042, 0x0043, 0x0051, 0x0052, 0x0053, 0x0061,
0x0062, 0x0063, 0x0071, 0x0072, 0x0081, 0x0082, 0x0091, 0x0092,
0x00A1, 0x00A2, 0x00B1, 0x00C1, 0x00D1, 0x00E1, 0x00F1, 0x0101,
0x0111, 0x0121, 0x0131, 0x0141, 0x0151, 0x0161, 0x0171, 0x0181,
0x0191, 0x01A1, 0x1001, 0x1002, 0x1003, 0x1011, 0x1012, 0x1021,
0x1031, 0x1041, 0x1051, 0x1061, 0x1071, 0x1081, 0x1091, 0x10A1,
0x10B1, 0x10C1, 0x10D1, 0x10E1, 0x10F1, 0x1101, 0x1111, 0x1121,
0x1131, 0x1141, 0x1151, 0x1161, 0x1171, 0x1181, 0x1191, 0x11A1,
0x11B1, 0x11C1, 0x11D1, 0x11E1, 0x11F1, 0x1201, 0x1211, 0x1221,
0x1231, 0x1241, 0x1251, 0x1261, 0x1271, 0x1281, 0x1BFF,
};
typedef struct MVInfo {
int mb_w;
int mb_h;
int mb_size;
int mb_stride;
int top;
MV *mv;
} MVInfo;
static const uint8_t clv_ac_codes[NUM_AC_CODES] = {
0x02, 0x0F, 0x15, 0x17, 0x1F, 0x25, 0x24, 0x21,
0x20, 0x07, 0x06, 0x20, 0x06, 0x14, 0x1E, 0x0F,
0x21, 0x50, 0x0E, 0x1D, 0x0E, 0x51, 0x0D, 0x23,
0x0D, 0x0C, 0x22, 0x52, 0x0B, 0x0C, 0x53, 0x13,
0x0B, 0x54, 0x12, 0x0A, 0x11, 0x09, 0x10, 0x08,
0x16, 0x55, 0x15, 0x14, 0x1C, 0x1B, 0x21, 0x20,
0x1F, 0x1E, 0x1D, 0x1C, 0x1B, 0x1A, 0x22, 0x23,
0x56, 0x57, 0x07, 0x19, 0x05, 0x0F, 0x04, 0x0E,
0x0D, 0x0C, 0x13, 0x12, 0x11, 0x10, 0x1A, 0x19,
0x18, 0x17, 0x16, 0x15, 0x14, 0x13, 0x18, 0x17,
0x16, 0x15, 0x14, 0x13, 0x12, 0x11, 0x07, 0x06,
0x05, 0x04, 0x24, 0x25, 0x26, 0x27, 0x58, 0x59,
0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F, 0x03,
};
static const uint8_t clv_ac_bits[NUM_AC_CODES] = {
2, 4, 6, 7, 8, 9, 9, 10,
10, 11, 11, 11, 3, 6, 8, 10,
11, 12, 4, 8, 10, 12, 5, 9,
10, 5, 9, 12, 5, 10, 12, 6,
10, 12, 6, 10, 6, 10, 6, 10,
7, 12, 7, 7, 8, 8, 9, 9,
9, 9, 9, 9, 9, 9, 11, 11,
12, 12, 4, 9, 11, 6, 11, 6,
6, 6, 7, 7, 7, 7, 8, 8,
8, 8, 8, 8, 8, 8, 9, 9,
9, 9, 9, 9, 9, 9, 10, 10,
10, 10, 11, 11, 11, 11, 12, 12,
12, 12, 12, 12, 12, 12, 7,
};
typedef struct TileInfo {
uint16_t flags;
int16_t bias;
MV mv;
struct TileInfo *child[4];
} TileInfo;
typedef struct CLVContext {
AVCodecContext *avctx;
IDCTDSPContext idsp;
AVFrame *pic;
AVFrame *prev;
GetBitContext gb;
int mb_width, mb_height;
int pmb_width, pmb_height;
MVInfo mvi;
int tile_size;
int tile_shift;
VLC dc_vlc, ac_vlc;
LevelCodes ylev[4], ulev[3], vlev[3];
int luma_dc_quant, chroma_dc_quant, ac_quant;
DECLARE_ALIGNED(16, int16_t, block)[64];
int top_dc[3], left_dc[4];
int iframes_warning;
} CLVContext;
static inline int decode_block(CLVContext *ctx, int16_t *blk, int has_ac,
@ -271,6 +219,282 @@ static int decode_mb(CLVContext *c, int x, int y)
return 0;
}
static int copy_block(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
int plane, int x, int y, int dx, int dy, int size)
{
int shift = plane > 0;
int sx = x + dx;
int sy = y + dy;
int sstride, dstride, soff, doff;
uint8_t *sbuf, *dbuf;
int i;
if (x < 0 || sx < 0 || y < 0 || sy < 0 ||
x + size > avctx->coded_width >> shift ||
y + size > avctx->coded_height >> shift ||
sx + size > avctx->coded_width >> shift ||
sy + size > avctx->coded_height >> shift)
return AVERROR_INVALIDDATA;
sstride = src->linesize[plane];
dstride = dst->linesize[plane];
soff = sx + sy * sstride;
sbuf = src->data[plane];
doff = x + y * dstride;
dbuf = dst->data[plane];
for (i = 0; i < size; i++) {
uint8_t *dptr = &dbuf[doff];
uint8_t *sptr = &sbuf[soff];
memcpy(dptr, sptr, size);
doff += dstride;
soff += sstride;
}
return 0;
}
static int copyadd_block(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
int plane, int x, int y, int dx, int dy, int size, int bias)
{
int shift = plane > 0;
int sx = x + dx;
int sy = y + dy;
int sstride = src->linesize[plane];
int dstride = dst->linesize[plane];
int soff = sx + sy * sstride;
uint8_t *sbuf = src->data[plane];
int doff = x + y * dstride;
uint8_t *dbuf = dst->data[plane];
int i, j;
if (x < 0 || sx < 0 || y < 0 || sy < 0 ||
x + size > avctx->coded_width >> shift ||
y + size > avctx->coded_height >> shift ||
sx + size > avctx->coded_width >> shift ||
sy + size > avctx->coded_height >> shift)
return AVERROR_INVALIDDATA;
for (j = 0; j < size; j++) {
uint8_t *dptr = &dbuf[doff];
uint8_t *sptr = &sbuf[soff];
for (i = 0; i < size; i++) {
int val = sptr[i] + bias;
dptr[i] = av_clip_uint8(val);
}
doff += dstride;
soff += sstride;
}
return 0;
}
static MV mvi_predict(MVInfo *mvi, int mb_x, int mb_y, MV diff)
{
MV res, pred_mv;
if (mvi->top) {
if (mb_x > 0) {
pred_mv = mvi->mv[mvi->mb_stride + mb_x - 1];
} else {
pred_mv = zero_mv;
}
} else if ((mb_x == 0) || (mb_x == mvi->mb_w - 1)) {
pred_mv = mvi->mv[mb_x];
} else {
MV A = mvi->mv[mvi->mb_stride + mb_x - 1];
MV B = mvi->mv[ mb_x ];
MV C = mvi->mv[ mb_x + 1];
pred_mv.x = mid_pred(A.x, B.x, C.x);
pred_mv.y = mid_pred(A.y, B.y, C.y);
}
res = pred_mv;
int left_mv = -((mb_x * mvi->mb_size));
int right_mv = ((mvi->mb_w - mb_x - 1) * mvi->mb_size);
if (res.x < left_mv) {
res.x = left_mv;
}
if (res.x > right_mv) {
res.x = right_mv;
}
int top_mv = -((mb_y * mvi->mb_size));
int bot_mv = ((mvi->mb_h - mb_y - 1) * mvi->mb_size);
if (res.y < top_mv) {
res.y = top_mv;
}
if (res.y > bot_mv) {
res.y = bot_mv;
}
mvi->mv[mvi->mb_stride + mb_x].x = res.x + diff.x;
mvi->mv[mvi->mb_stride + mb_x].y = res.y + diff.y;
return res;
}
static void mvi_reset(MVInfo *mvi, int mb_w, int mb_h, int mb_size)
{
mvi->top = 1;
mvi->mb_w = mb_w;
mvi->mb_h = mb_h;
mvi->mb_size = mb_size;
mvi->mb_stride = mb_w;
memset(mvi->mv, 0, sizeof(MV) * mvi->mb_stride * 2);
}
static void mvi_update_row(MVInfo *mvi)
{
int i;
mvi->top = 0;
for (i = 0 ; i < mvi->mb_stride; i++) {
mvi->mv[i] = mvi->mv[mvi->mb_stride + i];
}
}
static TileInfo* decode_tile_info(GetBitContext *gb, LevelCodes *lc, int level)
{
TileInfo *ti;
int i, flags = 0;
int16_t bias = 0;
MV mv = { 0 };
if (lc[level].flags_cb.table) {
flags = get_vlc2(gb, lc[level].flags_cb.table, lc[level].flags_cb.bits, 2);
}
if (lc[level].mv_cb.table) {
uint16_t mv_code = get_vlc2(gb, lc[level].mv_cb.table, lc[level].mv_cb.bits, 3);
if (mv_code != lc[level].mv_esc) {
mv.x = (int8_t)(mv_code & 0xff);
mv.y = (int8_t)(mv_code >> 8);
} else {
mv.x = get_sbits(gb, 8);
mv.y = get_sbits(gb, 8);
}
}
if (lc[level].bias_cb.table) {
uint16_t bias_val = get_vlc2(gb, lc[level].bias_cb.table, lc[level].bias_cb.bits, 2);
if (bias_val != lc[level].bias_esc) {
bias = (int16_t)(bias_val);
} else {
bias = get_sbits(gb, 16);
}
}
ti = av_calloc(1, sizeof(*ti));
if (!ti)
return NULL;
ti->flags = flags;
ti->mv = mv;
ti->bias = bias;
if (ti->flags) {
for (i = 0; i < 4; i++) {
if (ti->flags & (1 << i)) {
TileInfo *subti = decode_tile_info(gb, lc, level + 1);
ti->child[i] = subti;
}
}
}
return ti;
}
static int tile_do_block(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
int plane, int x, int y, int dx, int dy, int size, int bias)
{
int ret;
if (!bias) {
ret = copy_block(avctx, dst, src, plane, x, y, dx, dy, size);
} else {
ret = copyadd_block(avctx, dst, src, plane, x, y, dx, dy, size, bias);
}
return ret;
}
static int restore_tree(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
int plane, int x, int y, int size,
TileInfo *tile, MV root_mv)
{
int ret;
MV mv;
mv.x = root_mv.x + tile->mv.x;
mv.y = root_mv.y + tile->mv.y;
if (!tile->flags) {
ret = tile_do_block(avctx, dst, src, plane, x, y, mv.x, mv.y, size, tile->bias);
} else {
int i, hsize = size >> 1;
for (i = 0; i < 4; i++) {
int xoff = (i & 2) == 0 ? 0 : hsize;
int yoff = (i & 1) == 0 ? 0 : hsize;
if (tile->child[i]) {
ret = restore_tree(avctx, dst, src, plane, x + xoff, y + yoff, hsize, tile->child[i], root_mv);
av_freep(&tile->child[i]);
} else {
ret = tile_do_block(avctx, dst, src, plane, x + xoff, y + yoff, mv.x, mv.y, hsize, tile->bias);
}
}
}
return ret;
}
static void extend_edges(AVFrame *buf, int tile_size)
{
int comp, i, j;
for (comp = 0; comp < 3; comp++) {
int shift = comp > 0;
int w = buf->width >> shift;
int h = buf->height >> shift;
int size = comp == 0 ? tile_size : tile_size >> 1;
int stride = buf->linesize[comp];
uint8_t *framebuf = buf->data[comp];
int right = size - (w & (size - 1));
int bottom = size - (h & (size - 1));
if ((right == size) && (bottom == size)) {
return;
}
if (right != size) {
int off = w;
for (j = 0; j < h; j++) {
for (i = 0; i < right; i++) {
framebuf[off + i] = 0x80;
}
off += stride;
}
}
if (bottom != size) {
int off = h * stride;
for (j = 0; j < bottom; j++) {
for (i = 0; i < stride; i++) {
framebuf[off + i] = 0x80;
}
off += stride;
}
}
}
}
static int clv_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
@ -290,7 +514,13 @@ static int clv_decode_frame(AVCodecContext *avctx, void *data,
frame_type = bytestream2_get_byte(&gb);
if (frame_type & 0x2) {
if ((frame_type & 0x7f) == 0x30) {
if ((ret = ff_reget_buffer(avctx, c->pic)) < 0)
return ret;
c->pic->key_frame = 0;
c->pic->pict_type = AV_PICTURE_TYPE_P;
} else if (frame_type & 0x2) {
if (buf_size < c->mb_width * c->mb_height) {
av_log(avctx, AV_LOG_ERROR, "Packet too small\n");
return AVERROR_INVALIDDATA;
@ -299,9 +529,8 @@ static int clv_decode_frame(AVCodecContext *avctx, void *data,
if ((ret = ff_reget_buffer(avctx, c->pic)) < 0)
return ret;
c->pic->key_frame = frame_type & 0x20 ? 1 : 0;
c->pic->pict_type = frame_type & 0x20 ? AV_PICTURE_TYPE_I
: AV_PICTURE_TYPE_P;
c->pic->key_frame = 1;
c->pic->pict_type = AV_PICTURE_TYPE_I;
bytestream2_get_be32(&gb); // frame size;
c->ac_quant = bytestream2_get_byte(&gb);
@ -324,34 +553,133 @@ static int clv_decode_frame(AVCodecContext *avctx, void *data,
mb_ret = ret;
}
}
extend_edges(c->pic, c->tile_size);
} else {
int plane;
if ((ret = av_frame_ref(data, c->pic)) < 0)
if ((ret = ff_reget_buffer(avctx, c->pic)) < 0)
return ret;
*got_frame = 1;
} else {
if (!c->iframes_warning)
avpriv_report_missing_feature(avctx, "Non-I-frames in Clearvideo");
c->iframes_warning = 1;
return AVERROR_PATCHWELCOME;
ret = av_frame_copy(c->pic, c->prev);
if (ret < 0)
return ret;
if ((ret = init_get_bits8(&c->gb, buf + bytestream2_tell(&gb),
buf_size - bytestream2_tell(&gb))) < 0)
return ret;
mvi_reset(&c->mvi, c->pmb_width, c->pmb_height, 1 << c->tile_shift);
for (j = 0; j < c->pmb_height; j++) {
for (i = 0; i < c->pmb_width; i++) {
if (get_bits1(&c->gb)) {
MV mv = mvi_predict(&c->mvi, i, j, zero_mv);
for (plane = 0; plane < 3; plane++) {
int16_t x = plane == 0 ? i << c->tile_shift : i << (c->tile_shift - 1);
int16_t y = plane == 0 ? j << c->tile_shift : j << (c->tile_shift - 1);
int16_t size = plane == 0 ? 1 << c->tile_shift : 1 << (c->tile_shift - 1);
int16_t mx = plane == 0 ? mv.x : mv.x / 2;
int16_t my = plane == 0 ? mv.y : mv.y / 2;
ret = copy_block(avctx, c->pic, c->prev, plane, x, y, mx, my, size);
if (ret < 0)
mb_ret = ret;
}
} else {
int x = i << c->tile_shift;
int y = j << c->tile_shift;
int size = 1 << c->tile_shift;
TileInfo *tile;
MV mv, cmv;
tile = decode_tile_info(&c->gb, c->ylev, 0);
if (!tile)
return AVERROR(ENOMEM);
mv = mvi_predict(&c->mvi, i, j, tile->mv);
ret = restore_tree(avctx, c->pic, c->prev, 0, x, y, size, tile, mv);
if (ret < 0)
mb_ret = ret;
x = i << (c->tile_shift - 1);
y = j << (c->tile_shift - 1);
size = 1 << (c->tile_shift - 1);
cmv.x = mv.x + tile->mv.x;
cmv.y = mv.y + tile->mv.y;
cmv.x /= 2;
cmv.y /= 2;
av_freep(&tile);
tile = decode_tile_info(&c->gb, c->ulev, 0);
if (!tile)
return AVERROR(ENOMEM);
ret = restore_tree(avctx, c->pic, c->prev, 1, x, y, size, tile, cmv);
if (ret < 0)
mb_ret = ret;
av_freep(&tile);
tile = decode_tile_info(&c->gb, c->vlev, 0);
if (!tile)
return AVERROR(ENOMEM);
ret = restore_tree(avctx, c->pic, c->prev, 2, x, y, size, tile, cmv);
if (ret < 0)
mb_ret = ret;
av_freep(&tile);
}
}
mvi_update_row(&c->mvi);
}
extend_edges(c->pic, c->tile_size);
c->pic->key_frame = 0;
c->pic->pict_type = AV_PICTURE_TYPE_P;
}
if ((ret = av_frame_ref(data, c->pic)) < 0)
return ret;
FFSWAP(AVFrame *, c->pic, c->prev);
*got_frame = 1;
return mb_ret < 0 ? mb_ret : buf_size;
}
static av_cold int clv_decode_init(AVCodecContext *avctx)
{
CLVContext *const c = avctx->priv_data;
int ret;
int ret, w, h;
if (avctx->extradata_size == 110) {
c->tile_size = AV_RL32(&avctx->extradata[94]);
} else if (avctx->extradata_size == 150) {
c->tile_size = AV_RB32(&avctx->extradata[134]);
} else {
av_log(avctx, AV_LOG_ERROR, "Unsupported extradata size: %d\n", avctx->extradata_size);
return AVERROR_INVALIDDATA;
}
c->tile_shift = av_log2(c->tile_size);
if (1 << c->tile_shift != c->tile_size) {
av_log(avctx, AV_LOG_ERROR, "Tile size: %d, is not power of 2.\n", c->tile_size);
return AVERROR_INVALIDDATA;
}
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
w = avctx->width;
h = avctx->height;
ret = ff_set_dimensions(avctx, FFALIGN(w, 1 << c->tile_shift), FFALIGN(h, 1 << c->tile_shift));
if (ret < 0)
return ret;
avctx->width = w;
avctx->height = h;
c->avctx = avctx;
c->mb_width = FFALIGN(avctx->width, 16) >> 4;
c->mb_height = FFALIGN(avctx->height, 16) >> 4;
c->iframes_warning = 0;
c->pmb_width = (w + c->tile_size - 1) >> c->tile_shift;
c->pmb_height = (h + c->tile_size - 1) >> c->tile_shift;
c->pic = av_frame_alloc();
if (!c->pic)
c->prev = av_frame_alloc();
c->mvi.mv = av_calloc(c->pmb_width * 2, sizeof(*c->mvi.mv));
if (!c->pic || !c->prev || !c->mvi.mv)
return AVERROR(ENOMEM);
ff_idctdsp_init(&c->idsp, avctx);
@ -371,17 +699,198 @@ static av_cold int clv_decode_init(AVCodecContext *avctx)
return ret;
}
ret = init_vlc(&c->ylev[0].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsy_0_bits),
clv_flagsy_0_bits, 1, 1,
clv_flagsy_0_codes, 2, 2, 0);
if (ret)
return ret;
ret = init_vlc(&c->ylev[1].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsy_1_bits),
clv_flagsy_1_bits, 1, 1,
clv_flagsy_1_codes, 2, 2, 0);
if (ret)
return ret;
ret = init_vlc(&c->ylev[2].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsy_2_bits),
clv_flagsy_2_bits, 1, 1,
clv_flagsy_2_codes, 2, 2, 0);
if (ret)
return ret;
ret = init_vlc(&c->ulev[0].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsu_0_bits),
clv_flagsu_0_bits, 1, 1,
clv_flagsu_0_codes, 2, 2, 0);
if (ret)
return ret;
ret = init_vlc(&c->ulev[1].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsu_1_bits),
clv_flagsu_1_bits, 1, 1,
clv_flagsu_1_codes, 2, 2, 0);
if (ret)
return ret;
ret = init_vlc(&c->vlev[0].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsv_0_bits),
clv_flagsv_0_bits, 1, 1,
clv_flagsv_0_codes, 2, 2, 0);
if (ret)
return ret;
ret = init_vlc(&c->vlev[1].flags_cb, 9, FF_ARRAY_ELEMS(clv_flagsv_1_bits),
clv_flagsv_1_bits, 1, 1,
clv_flagsv_1_codes, 2, 2, 0);
if (ret)
return ret;
ret = ff_init_vlc_sparse(&c->ylev[0].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvy_0_bits),
clv_mvy_0_bits, 1, 1,
clv_mvy_0_codes, 2, 2,
clv_mvy_0_syms, 2, 2, 0);
if (ret)
return ret;
ret = ff_init_vlc_sparse(&c->ylev[1].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvy_1_bits),
clv_mvy_1_bits, 1, 1,
clv_mvy_1_codes, 2, 2,
clv_mvy_1_syms, 2, 2, 0);
if (ret)
return ret;
ret = ff_init_vlc_sparse(&c->ylev[2].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvy_2_bits),
clv_mvy_2_bits, 1, 1,
clv_mvy_2_codes, 2, 2,
clv_mvy_2_syms, 2, 2, 0);
if (ret)
return ret;
ret = ff_init_vlc_sparse(&c->ylev[3].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvy_3_bits),
clv_mvy_3_bits, 1, 1,
clv_mvy_3_codes, 2, 2,
clv_mvy_3_syms, 2, 2, 0);
if (ret)
return ret;
ret = ff_init_vlc_sparse(&c->ulev[1].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvu_1_bits),
clv_mvu_1_bits, 1, 1,
clv_mvu_1_codes, 2, 2,
clv_mvu_1_syms, 2, 2, 0);
if (ret)
return ret;
ret = ff_init_vlc_sparse(&c->ulev[2].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvu_2_bits),
clv_mvu_2_bits, 1, 1,
clv_mvu_2_codes, 2, 2,
clv_mvu_2_syms, 2, 2, 0);
if (ret)
return ret;
ret = ff_init_vlc_sparse(&c->vlev[1].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvv_1_bits),
clv_mvv_1_bits, 1, 1,
clv_mvv_1_codes, 2, 2,
clv_mvv_1_syms, 2, 2, 0);
if (ret)
return ret;
ret = ff_init_vlc_sparse(&c->vlev[2].mv_cb, 9, FF_ARRAY_ELEMS(clv_mvv_2_bits),
clv_mvv_2_bits, 1, 1,
clv_mvv_2_codes, 2, 2,
clv_mvv_2_syms, 2, 2, 0);
if (ret)
return ret;
ret = ff_init_vlc_sparse(&c->ylev[1].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasy_1_bits),
clv_biasy_1_bits, 1, 1,
clv_biasy_1_codes, 2, 2,
clv_biasy_1_syms, 2, 2, 0);
if (ret)
return ret;
ret = ff_init_vlc_sparse(&c->ylev[2].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasy_2_bits),
clv_biasy_2_bits, 1, 1,
clv_biasy_2_codes, 2, 2,
clv_biasy_2_syms, 2, 2, 0);
if (ret)
return ret;
ret = ff_init_vlc_sparse(&c->ylev[3].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasy_3_bits),
clv_biasy_3_bits, 1, 1,
clv_biasy_3_codes, 2, 2,
clv_biasy_3_syms, 2, 2, 0);
if (ret)
return ret;
ret = ff_init_vlc_sparse(&c->ulev[1].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasu_1_bits),
clv_biasu_1_bits, 1, 1,
clv_biasu_1_codes, 2, 2,
clv_biasu_1_syms, 2, 2, 0);
if (ret)
return ret;
ret = ff_init_vlc_sparse(&c->ulev[2].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasu_2_bits),
clv_biasu_2_bits, 1, 1,
clv_biasu_2_codes, 2, 2,
clv_biasu_2_syms, 2, 2, 0);
if (ret)
return ret;
ret = ff_init_vlc_sparse(&c->vlev[1].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasv_1_bits),
clv_biasv_1_bits, 1, 1,
clv_biasv_1_codes, 2, 2,
clv_biasv_1_syms, 2, 2, 0);
if (ret)
return ret;
ret = ff_init_vlc_sparse(&c->vlev[2].bias_cb, 9, FF_ARRAY_ELEMS(clv_biasv_2_bits),
clv_biasv_2_bits, 1, 1,
clv_biasv_2_codes, 2, 2,
clv_biasv_2_syms, 2, 2, 0);
if (ret)
return ret;
c->ylev[0].mv_esc = 0x0909;
c->ylev[1].mv_esc = 0x0A0A;
c->ylev[2].mv_esc = 0x1010;
c->ylev[3].mv_esc = 0x1313;
c->ulev[1].mv_esc = 0x0808;
c->ulev[2].mv_esc = 0x0B0B;
c->vlev[1].mv_esc = 0x0808;
c->vlev[2].mv_esc = 0x0B0B;
c->ylev[1].bias_esc = 0x100;
c->ylev[2].bias_esc = 0x100;
c->ylev[3].bias_esc = 0x100;
c->ulev[1].bias_esc = 0x100;
c->ulev[2].bias_esc = 0x100;
c->vlev[1].bias_esc = 0x100;
c->vlev[2].bias_esc = 0x100;
return 0;
}
static av_cold int clv_decode_end(AVCodecContext *avctx)
{
CLVContext *const c = avctx->priv_data;
int i;
av_frame_free(&c->prev);
av_frame_free(&c->pic);
av_freep(&c->mvi.mv);
ff_free_vlc(&c->dc_vlc);
ff_free_vlc(&c->ac_vlc);
for (i = 0; i < 4; i++) {
ff_free_vlc(&c->ylev[i].mv_cb);
ff_free_vlc(&c->ylev[i].flags_cb);
ff_free_vlc(&c->ylev[i].bias_cb);
}
for (i = 0; i < 3; i++) {
ff_free_vlc(&c->ulev[i].mv_cb);
ff_free_vlc(&c->ulev[i].flags_cb);
ff_free_vlc(&c->ulev[i].bias_cb);
ff_free_vlc(&c->vlev[i].mv_cb);
ff_free_vlc(&c->vlev[i].flags_cb);
ff_free_vlc(&c->vlev[i].bias_cb);
}
return 0;
}

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