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FFmpeg/libavcodec/sheervideo.c

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/*
* BitJazz SheerVideo decoder
* Copyright (c) 2016 Paul B Mahol
*
* 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#define CACHED_BITSTREAM_READER !ARCH_X86_32
#define SHEER_VLC_BITS 12
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
#include "thread.h"
#include "sheervideodata.h"
typedef struct SheerVideoContext {
unsigned format;
int alt;
VLC vlc[2];
void (*decode_frame)(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb);
} SheerVideoContext;
static void decode_ca4i(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint16_t *dst_y, *dst_u, *dst_v, *dst_a;
int x, y;
dst_a = (uint16_t *)p->data[3];
dst_y = (uint16_t *)p->data[0];
dst_u = (uint16_t *)p->data[1];
dst_v = (uint16_t *)p->data[2];
for (y = 0; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_a[x] = get_bits(gb, 10);
dst_y[x] = get_bits(gb, 10);
dst_u[x] = get_bits(gb, 10);
dst_v[x] = get_bits(gb, 10);
}
} else {
int pred[4] = { 502, 512, 512, 502 };
for (x = 0; x < avctx->width; x++) {
int y, u, v, a;
a = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_a[x] = pred[3] = (a + pred[3]) & 0x3ff;
dst_y[x] = pred[0] = (y + pred[0]) & 0x3ff;
dst_u[x] = pred[1] = (u + pred[1]) & 0x3ff;
dst_v[x] = pred[2] = (v + pred[2]) & 0x3ff;
}
}
dst_y += p->linesize[0] / 2;
dst_u += p->linesize[1] / 2;
dst_v += p->linesize[2] / 2;
dst_a += p->linesize[3] / 2;
}
}
static void decode_ca4p(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint16_t *dst_y, *dst_u, *dst_v, *dst_a;
int x, y;
dst_a = (uint16_t *)p->data[3];
dst_y = (uint16_t *)p->data[0];
dst_u = (uint16_t *)p->data[1];
dst_v = (uint16_t *)p->data[2];
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_a[x] = get_bits(gb, 10);
dst_y[x] = get_bits(gb, 10);
dst_u[x] = get_bits(gb, 10);
dst_v[x] = get_bits(gb, 10);
}
} else {
int pred[4] = { 502, 512, 512, 502 };
for (x = 0; x < avctx->width; x++) {
int y, u, v, a;
a = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_a[x] = pred[3] = (a + pred[3]) & 0x3ff;
dst_y[x] = pred[0] = (y + pred[0]) & 0x3ff;
dst_u[x] = pred[1] = (u + pred[1]) & 0x3ff;
dst_v[x] = pred[2] = (v + pred[2]) & 0x3ff;
}
}
dst_y += p->linesize[0] / 2;
dst_u += p->linesize[1] / 2;
dst_v += p->linesize[2] / 2;
dst_a += p->linesize[3] / 2;
for (y = 1; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_a[x] = get_bits(gb, 10);
dst_y[x] = get_bits(gb, 10);
dst_u[x] = get_bits(gb, 10);
dst_v[x] = get_bits(gb, 10);
}
} else {
int pred_TL[4], pred_L[4], pred_T[4];
int y, u, v, a;
pred_TL[0] = pred_L[0] = dst_y[-p->linesize[0] / 2];
pred_TL[1] = pred_L[1] = dst_u[-p->linesize[1] / 2];
pred_TL[2] = pred_L[2] = dst_v[-p->linesize[2] / 2];
pred_TL[3] = pred_L[3] = dst_a[-p->linesize[3] / 2];
for (x = 0; x < avctx->width; x++) {
pred_T[0] = dst_y[-p->linesize[0] / 2 + x];
pred_T[1] = dst_u[-p->linesize[1] / 2 + x];
pred_T[2] = dst_v[-p->linesize[2] / 2 + x];
pred_T[3] = dst_a[-p->linesize[3] / 2 + x];
a = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_a[x] = pred_L[3] = (a + ((3 * (pred_T[3] + pred_L[3]) - 2 * pred_TL[3]) >> 2)) & 0x3ff;
dst_y[x] = pred_L[0] = (y + ((3 * (pred_T[0] + pred_L[0]) - 2 * pred_TL[0]) >> 2)) & 0x3ff;
dst_u[x] = pred_L[1] = (u + ((3 * (pred_T[1] + pred_L[1]) - 2 * pred_TL[1]) >> 2)) & 0x3ff;
dst_v[x] = pred_L[2] = (v + ((3 * (pred_T[2] + pred_L[2]) - 2 * pred_TL[2]) >> 2)) & 0x3ff;
pred_TL[0] = pred_T[0];
pred_TL[1] = pred_T[1];
pred_TL[2] = pred_T[2];
pred_TL[3] = pred_T[3];
}
}
dst_y += p->linesize[0] / 2;
dst_u += p->linesize[1] / 2;
dst_v += p->linesize[2] / 2;
dst_a += p->linesize[3] / 2;
}
}
static void decode_ybr10i(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint16_t *dst_y, *dst_u, *dst_v;
int x, y;
dst_y = (uint16_t *)p->data[0];
dst_u = (uint16_t *)p->data[1];
dst_v = (uint16_t *)p->data[2];
for (y = 0; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_y[x] = get_bits(gb, 10);
dst_u[x] = get_bits(gb, 10);
dst_v[x] = get_bits(gb, 10);
}
} else {
int pred[4] = { 502, 512, 512, 512 };
for (x = 0; x < avctx->width; x++) {
int y, u, v;
y = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x] = pred[0] = (y + pred[0]) & 0x3ff;
dst_u[x] = pred[1] = (u + pred[1]) & 0x3ff;
dst_v[x] = pred[2] = (v + pred[2]) & 0x3ff;
}
}
dst_y += p->linesize[0] / 2;
dst_u += p->linesize[1] / 2;
dst_v += p->linesize[2] / 2;
}
}
static void decode_ybr10(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint16_t *dst_y, *dst_u, *dst_v;
int x, y;
dst_y = (uint16_t *)p->data[0];
dst_u = (uint16_t *)p->data[1];
dst_v = (uint16_t *)p->data[2];
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_y[x] = get_bits(gb, 10);
dst_u[x] = get_bits(gb, 10);
dst_v[x] = get_bits(gb, 10);
}
} else {
int pred[4] = { 502, 512, 512, 512 };
for (x = 0; x < avctx->width; x++) {
int y, u, v;
y = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x] = pred[0] = (y + pred[0]) & 0x3ff;
dst_u[x] = pred[1] = (u + pred[1]) & 0x3ff;
dst_v[x] = pred[2] = (v + pred[2]) & 0x3ff;
}
}
dst_y += p->linesize[0] / 2;
dst_u += p->linesize[1] / 2;
dst_v += p->linesize[2] / 2;
for (y = 1; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_y[x] = get_bits(gb, 10);
dst_u[x] = get_bits(gb, 10);
dst_v[x] = get_bits(gb, 10);
}
} else {
int pred_TL[4], pred_L[4], pred_T[4];
int y, u, v;
pred_TL[0] = pred_L[0] = dst_y[-p->linesize[0] / 2];
pred_TL[1] = pred_L[1] = dst_u[-p->linesize[1] / 2];
pred_TL[2] = pred_L[2] = dst_v[-p->linesize[2] / 2];
for (x = 0; x < avctx->width; x++) {
pred_T[0] = dst_y[-p->linesize[0] / 2 + x];
pred_T[1] = dst_u[-p->linesize[1] / 2 + x];
pred_T[2] = dst_v[-p->linesize[2] / 2 + x];
y = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x] = pred_L[0] = (y + ((3 * (pred_T[0] + pred_L[0]) - 2 * pred_TL[0]) >> 2)) & 0x3ff;
dst_u[x] = pred_L[1] = (u + ((3 * (pred_T[1] + pred_L[1]) - 2 * pred_TL[1]) >> 2)) & 0x3ff;
dst_v[x] = pred_L[2] = (v + ((3 * (pred_T[2] + pred_L[2]) - 2 * pred_TL[2]) >> 2)) & 0x3ff;
pred_TL[0] = pred_T[0];
pred_TL[1] = pred_T[1];
pred_TL[2] = pred_T[2];
}
}
dst_y += p->linesize[0] / 2;
dst_u += p->linesize[1] / 2;
dst_v += p->linesize[2] / 2;
}
}
static void decode_yry10i(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint16_t *dst_y, *dst_u, *dst_v;
int x, y;
dst_y = (uint16_t *)p->data[0];
dst_u = (uint16_t *)p->data[1];
dst_v = (uint16_t *)p->data[2];
for (y = 0; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x += 2) {
dst_y[x ] = get_bits(gb, 10);
dst_u[x / 2] = get_bits(gb, 10);
dst_y[x + 1] = get_bits(gb, 10);
dst_v[x / 2] = get_bits(gb, 10);
}
} else {
int pred[4] = { 502, 512, 512, 0 };
for (x = 0; x < avctx->width; x += 2) {
int y1, y2, u, v;
y1 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y2 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x ] = pred[0] = (y1 + pred[0]) & 0x3ff;
dst_u[x / 2] = pred[1] = (u + pred[1]) & 0x3ff;
dst_y[x + 1] = pred[0] = (y2 + pred[0]) & 0x3ff;
dst_v[x / 2] = pred[2] = (v + pred[2]) & 0x3ff;
}
}
dst_y += p->linesize[0] / 2;
dst_u += p->linesize[1] / 2;
dst_v += p->linesize[2] / 2;
}
}
static void decode_yry10(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint16_t *dst_y, *dst_u, *dst_v;
int x, y;
dst_y = (uint16_t *)p->data[0];
dst_u = (uint16_t *)p->data[1];
dst_v = (uint16_t *)p->data[2];
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x += 2) {
dst_y[x ] = get_bits(gb, 10);
dst_u[x / 2] = get_bits(gb, 10);
dst_y[x + 1] = get_bits(gb, 10);
dst_v[x / 2] = get_bits(gb, 10);
}
} else {
int pred[4] = { 502, 512, 512, 0 };
for (x = 0; x < avctx->width; x += 2) {
int y1, y2, u, v;
y1 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y2 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x ] = pred[0] = (y1 + pred[0]) & 0x3ff;
dst_u[x / 2] = pred[1] = (u + pred[1]) & 0x3ff;
dst_y[x + 1] = pred[0] = (y2 + pred[0]) & 0x3ff;
dst_v[x / 2] = pred[2] = (v + pred[2]) & 0x3ff;
}
}
dst_y += p->linesize[0] / 2;
dst_u += p->linesize[1] / 2;
dst_v += p->linesize[2] / 2;
for (y = 1; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x += 2) {
dst_y[x ] = get_bits(gb, 10);
dst_u[x / 2] = get_bits(gb, 10);
dst_y[x + 1] = get_bits(gb, 10);
dst_v[x / 2] = get_bits(gb, 10);
}
} else {
int pred_TL[6], pred_L[6], pred_T[6];
int y1, y2, u, v;
pred_TL[0] = pred_L[0] = dst_y[-p->linesize[0] / 2];
pred_TL[1] = pred_L[1] = dst_u[-p->linesize[1] / 2];
pred_TL[2] = pred_L[2] = dst_v[-p->linesize[2] / 2];
for (x = 0; x < avctx->width; x += 2) {
pred_T[0] = dst_y[-p->linesize[0] / 2 + x];
pred_T[3] = dst_y[-p->linesize[0] / 2 + x + 1];
pred_T[1] = dst_u[-p->linesize[1] / 2 + x / 2];
pred_T[2] = dst_v[-p->linesize[2] / 2 + x / 2];
y1 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y2 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x ] = pred_L[0] = (y1 + ((3 * (pred_T[0] + pred_L[0]) - 2 * pred_TL[0]) >> 2)) & 0x3ff;
dst_u[x / 2] = pred_L[1] = (u + (((pred_L[1] - pred_TL[1]) >> 1) + pred_T[1])) & 0x3ff;
dst_y[x + 1] = pred_L[0] = (y2 + ((3 * (pred_T[3] + pred_L[0]) - 2 * pred_T[0]) >> 2)) & 0x3ff;
dst_v[x / 2] = pred_L[2] = (v + (((pred_L[2] - pred_TL[2]) >> 1) + pred_T[2])) & 0x3ff;
pred_TL[0] = pred_T[3];
pred_TL[1] = pred_T[1];
pred_TL[2] = pred_T[2];
}
}
dst_y += p->linesize[0] / 2;
dst_u += p->linesize[1] / 2;
dst_v += p->linesize[2] / 2;
}
}
static void decode_ca2i(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint16_t *dst_y, *dst_u, *dst_v, *dst_a;
int x, y;
dst_y = (uint16_t *)p->data[0];
dst_u = (uint16_t *)p->data[1];
dst_v = (uint16_t *)p->data[2];
dst_a = (uint16_t *)p->data[3];
for (y = 0; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x += 2) {
dst_a[x ] = get_bits(gb, 10);
dst_y[x ] = get_bits(gb, 10);
dst_u[x / 2] = get_bits(gb, 10);
dst_a[x + 1] = get_bits(gb, 10);
dst_y[x + 1] = get_bits(gb, 10);
dst_v[x / 2] = get_bits(gb, 10);
}
} else {
int pred[4] = { 502, 512, 512, 502 };
for (x = 0; x < avctx->width; x += 2) {
int y1, y2, u, v, a1, a2;
a1 = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y1 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
a2 = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y2 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x ] = pred[0] = (y1 + pred[0]) & 0x3ff;
dst_u[x / 2] = pred[1] = (u + pred[1]) & 0x3ff;
dst_y[x + 1] = pred[0] = (y2 + pred[0]) & 0x3ff;
dst_a[x ] = pred[3] = (a1 + pred[3]) & 0x3ff;
dst_v[x / 2] = pred[2] = (v + pred[2]) & 0x3ff;
dst_a[x + 1] = pred[3] = (a2 + pred[3]) & 0x3ff;
}
}
dst_y += p->linesize[0] / 2;
dst_u += p->linesize[1] / 2;
dst_v += p->linesize[2] / 2;
dst_a += p->linesize[3] / 2;
}
}
static void decode_ca2p(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint16_t *dst_y, *dst_u, *dst_v, *dst_a;
int x, y;
dst_y = (uint16_t *)p->data[0];
dst_u = (uint16_t *)p->data[1];
dst_v = (uint16_t *)p->data[2];
dst_a = (uint16_t *)p->data[3];
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x += 2) {
dst_a[x ] = get_bits(gb, 10);
dst_y[x ] = get_bits(gb, 10);
dst_u[x / 2] = get_bits(gb, 10);
dst_a[x + 1] = get_bits(gb, 10);
dst_y[x + 1] = get_bits(gb, 10);
dst_v[x / 2] = get_bits(gb, 10);
}
} else {
int pred[4] = { 502, 512, 512, 502 };
for (x = 0; x < avctx->width; x += 2) {
int y1, y2, u, v, a1, a2;
a1 = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y1 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
a2 = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y2 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x ] = pred[0] = (y1 + pred[0]) & 0x3ff;
dst_u[x / 2] = pred[1] = (u + pred[1]) & 0x3ff;
dst_y[x + 1] = pred[0] = (y2 + pred[0]) & 0x3ff;
dst_a[x ] = pred[3] = (a1 + pred[3]) & 0x3ff;
dst_v[x / 2] = pred[2] = (v + pred[2]) & 0x3ff;
dst_a[x + 1] = pred[3] = (a2 + pred[3]) & 0x3ff;
}
}
dst_y += p->linesize[0] / 2;
dst_u += p->linesize[1] / 2;
dst_v += p->linesize[2] / 2;
dst_a += p->linesize[3] / 2;
for (y = 1; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x += 2) {
dst_a[x ] = get_bits(gb, 10);
dst_y[x ] = get_bits(gb, 10);
dst_u[x / 2] = get_bits(gb, 10);
dst_a[x + 1] = get_bits(gb, 10);
dst_y[x + 1] = get_bits(gb, 10);
dst_v[x / 2] = get_bits(gb, 10);
}
} else {
int pred_TL[6], pred_L[6], pred_T[6];
int y1, y2, u, v, a1, a2;
pred_TL[0] = pred_L[0] = dst_y[-p->linesize[0] / 2];
pred_TL[1] = pred_L[1] = dst_u[-p->linesize[1] / 2];
pred_TL[2] = pred_L[2] = dst_v[-p->linesize[2] / 2];
pred_TL[4] = pred_L[4] = dst_a[-p->linesize[3] / 2];
for (x = 0; x < avctx->width; x += 2) {
pred_T[0] = dst_y[-p->linesize[0] / 2 + x];
pred_T[3] = dst_y[-p->linesize[0] / 2 + x + 1];
pred_T[1] = dst_u[-p->linesize[1] / 2 + x / 2];
pred_T[2] = dst_v[-p->linesize[2] / 2 + x / 2];
pred_T[4] = dst_a[-p->linesize[3] / 2 + x];
pred_T[5] = dst_a[-p->linesize[3] / 2 + x + 1];
a1 = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y1 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
a2 = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y2 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x ] = pred_L[0] = (y1 + ((3 * (pred_T[0] + pred_L[0]) - 2 * pred_TL[0]) >> 2)) & 0x3ff;
dst_u[x / 2] = pred_L[1] = (u + (((pred_L[1] - pred_TL[1]) >> 1) + pred_T[1])) & 0x3ff;
dst_y[x + 1] = pred_L[0] = (y2 + ((3 * (pred_T[3] + pred_L[0]) - 2 * pred_T[0]) >> 2)) & 0x3ff;
dst_v[x / 2] = pred_L[2] = (v + (((pred_L[2] - pred_TL[2]) >> 1) + pred_T[2])) & 0x3ff;
dst_a[x ] = pred_L[4] = (a1 + ((3 * (pred_T[4] + pred_L[4]) - 2 * pred_TL[4]) >> 2)) & 0x3ff;
dst_a[x + 1] = pred_L[4] = (a2 + ((3 * (pred_T[5] + pred_L[4]) - 2 * pred_T[4]) >> 2)) & 0x3ff;
pred_TL[0] = pred_T[3];
pred_TL[1] = pred_T[1];
pred_TL[2] = pred_T[2];
pred_TL[4] = pred_T[5];
}
}
dst_y += p->linesize[0] / 2;
dst_u += p->linesize[1] / 2;
dst_v += p->linesize[2] / 2;
dst_a += p->linesize[3] / 2;
}
}
static void decode_c82i(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint8_t *dst_y, *dst_u, *dst_v, *dst_a;
int x, y;
dst_y = p->data[0];
dst_u = p->data[1];
dst_v = p->data[2];
dst_a = p->data[3];
for (y = 0; y < avctx->height; y += 1) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x += 2) {
dst_a[x ] = get_bits(gb, 8);
dst_y[x ] = get_bits(gb, 8);
dst_u[x / 2] = get_bits(gb, 8);
dst_a[x + 1] = get_bits(gb, 8);
dst_y[x + 1] = get_bits(gb, 8);
dst_v[x / 2] = get_bits(gb, 8);
}
} else {
int pred[4] = { 125, -128, -128, 125 };
for (x = 0; x < avctx->width; x += 2) {
int y1, y2, u, v, a1, a2;
a1 = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y1 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
a2 = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y2 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x ] = pred[0] = (y1 + pred[0]) & 0xff;
dst_y[x + 1] = pred[0] = (y2 + pred[0]) & 0xff;
dst_u[x / 2] = pred[1] = (u + pred[1]) & 0xff;
dst_v[x / 2] = pred[2] = (v + pred[2]) & 0xff;
dst_a[x ] = pred[3] = (a1 + pred[3]) & 0xff;
dst_a[x + 1] = pred[3] = (a2 + pred[3]) & 0xff;
}
}
dst_y += p->linesize[0];
dst_u += p->linesize[1];
dst_v += p->linesize[2];
dst_a += p->linesize[3];
}
}
static void decode_c82p(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint8_t *dst_y, *dst_u, *dst_v, *dst_a;
int x, y;
dst_y = p->data[0];
dst_u = p->data[1];
dst_v = p->data[2];
dst_a = p->data[3];
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x += 2) {
dst_a[x ] = get_bits(gb, 8);
dst_y[x ] = get_bits(gb, 8);
dst_u[x / 2] = get_bits(gb, 8);
dst_a[x + 1] = get_bits(gb, 8);
dst_y[x + 1] = get_bits(gb, 8);
dst_v[x / 2] = get_bits(gb, 8);
}
} else {
int pred[4] = { 125, -128, -128, 125 };
for (x = 0; x < avctx->width; x += 2) {
int y1, y2, u, v, a1, a2;
a1 = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y1 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
a2 = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y2 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x ] = pred[0] = (y1 + pred[0]) & 0xff;
dst_u[x / 2] = pred[1] = (u + pred[1]) & 0xff;
dst_y[x + 1] = pred[0] = (y2 + pred[0]) & 0xff;
dst_a[x ] = pred[3] = (a1 + pred[3]) & 0xff;
dst_v[x / 2] = pred[2] = (v + pred[2]) & 0xff;
dst_a[x + 1] = pred[3] = (a2 + pred[3]) & 0xff;
}
}
dst_y += p->linesize[0];
dst_u += p->linesize[1];
dst_v += p->linesize[2];
dst_a += p->linesize[3];
for (y = 1; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x += 2) {
dst_a[x ] = get_bits(gb, 8);
dst_y[x ] = get_bits(gb, 8);
dst_u[x / 2] = get_bits(gb, 8);
dst_a[x + 1] = get_bits(gb, 8);
dst_y[x + 1] = get_bits(gb, 8);
dst_v[x / 2] = get_bits(gb, 8);
}
} else {
int pred_TL[6], pred_L[6], pred_T[6];
int y1, y2, u, v, a1, a2;
pred_TL[0] = pred_L[0] = dst_y[-p->linesize[0]];
pred_TL[1] = pred_L[1] = dst_u[-p->linesize[1]];
pred_TL[2] = pred_L[2] = dst_v[-p->linesize[2]];
pred_TL[4] = pred_L[4] = dst_a[-p->linesize[3]];
for (x = 0; x < avctx->width; x += 2) {
pred_T[0] = dst_y[-p->linesize[0] + x];
pred_T[3] = dst_y[-p->linesize[0] + x + 1];
pred_T[1] = dst_u[-p->linesize[1] + x / 2];
pred_T[2] = dst_v[-p->linesize[2] + x / 2];
pred_T[4] = dst_a[-p->linesize[3] + x];
pred_T[5] = dst_a[-p->linesize[3] + x + 1];
a1 = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y1 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
a2 = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y2 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x ] = pred_L[0] = (y1 + ((3 * (pred_T[0] + pred_L[0]) - 2 * pred_TL[0]) >> 2)) & 0xff;
dst_u[x / 2] = pred_L[1] = (u + (((pred_L[1] - pred_TL[1]) >> 1) + pred_T[1])) & 0xff;
dst_y[x + 1] = pred_L[0] = (y2 + ((3 * (pred_T[3] + pred_L[0]) - 2 * pred_T[0]) >> 2)) & 0xff;
dst_v[x / 2] = pred_L[2] = (v + (((pred_L[2] - pred_TL[2]) >> 1) + pred_T[2])) & 0xff;
dst_a[x ] = pred_L[4] = (a1 + ((3 * (pred_T[4] + pred_L[4]) - 2 * pred_TL[4]) >> 2)) & 0xff;
dst_a[x + 1] = pred_L[4] = (a2 + ((3 * (pred_T[5] + pred_L[4]) - 2 * pred_T[4]) >> 2)) & 0xff;
pred_TL[0] = pred_T[3];
pred_TL[1] = pred_T[1];
pred_TL[2] = pred_T[2];
pred_TL[4] = pred_T[5];
}
}
dst_y += p->linesize[0];
dst_u += p->linesize[1];
dst_v += p->linesize[2];
dst_a += p->linesize[3];
}
}
static void decode_ybyr(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint8_t *dst_y, *dst_u, *dst_v;
int x, y;
dst_y = p->data[0];
dst_u = p->data[1];
dst_v = p->data[2];
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x += 2) {
dst_y[x ] = get_bits(gb, 8);
dst_u[x / 2] = get_bits(gb, 8) + 128;
dst_y[x + 1] = get_bits(gb, 8);
dst_v[x / 2] = get_bits(gb, 8) + 128;
}
} else {
int pred[4] = { -128, 128, 128, 0 };
for (x = 0; x < avctx->width; x += 2) {
int y1, y2, u, v;
y1 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y2 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x ] = pred[0] = (y1 + pred[0]) & 0xff;
dst_u[x / 2] = pred[1] = (u + pred[1]) & 0xff;
dst_y[x + 1] = pred[0] = (y2 + pred[0]) & 0xff;
dst_v[x / 2] = pred[2] = (v + pred[2]) & 0xff;
}
}
dst_y += p->linesize[0];
dst_u += p->linesize[1];
dst_v += p->linesize[2];
for (y = 1; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x += 2) {
dst_y[x ] = get_bits(gb, 8);
dst_u[x / 2] = get_bits(gb, 8) + 128;
dst_y[x + 1] = get_bits(gb, 8);
dst_v[x / 2] = get_bits(gb, 8) + 128;
}
} else {
int pred_TL[4], pred_L[4], pred_T[4];
int y1, y2, u, v;
pred_TL[0] = pred_L[0] = dst_y[-p->linesize[0]];
pred_TL[1] = pred_L[1] = dst_u[-p->linesize[1]];
pred_TL[2] = pred_L[2] = dst_v[-p->linesize[2]];
for (x = 0; x < avctx->width; x += 2) {
pred_T[0] = dst_y[-p->linesize[0] + x];
pred_T[3] = dst_y[-p->linesize[0] + x + 1];
pred_T[1] = dst_u[-p->linesize[1] + x / 2];
pred_T[2] = dst_v[-p->linesize[2] + x / 2];
y1 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y2 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x ] = pred_L[0] = (y1 + ((3 * (pred_T[0] + pred_L[0]) - 2 * pred_TL[0]) >> 2)) & 0xff;
dst_u[x / 2] = pred_L[1] = (u + (((pred_L[1] - pred_TL[1]) >> 1) + pred_T[1])) & 0xff;
dst_y[x + 1] = pred_L[0] = (y2 + ((3 * (pred_T[3] + pred_L[0]) - 2 * pred_T[0]) >> 2)) & 0xff;
dst_v[x / 2] = pred_L[2] = (v + (((pred_L[2] - pred_TL[2]) >> 1) + pred_T[2])) & 0xff;
pred_TL[0] = pred_T[3];
pred_TL[1] = pred_T[1];
pred_TL[2] = pred_T[2];
}
}
dst_y += p->linesize[0];
dst_u += p->linesize[1];
dst_v += p->linesize[2];
}
}
static void decode_byryi(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint8_t *dst_y, *dst_u, *dst_v;
int x, y;
dst_y = p->data[0];
dst_u = p->data[1];
dst_v = p->data[2];
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x += 2) {
dst_y[x ] = get_bits(gb, 8);
dst_u[x / 2] = get_bits(gb, 8);
dst_y[x + 1] = get_bits(gb, 8);
dst_v[x / 2] = get_bits(gb, 8);
}
} else {
int pred[4] = { 125, -128, -128, 0 };
for (x = 0; x < avctx->width; x += 2) {
int y1, y2, u, v;
y1 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y2 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x ] = pred[0] = (y1 + pred[0]) & 0xff;
dst_u[x / 2] = pred[1] = (u + pred[1]) & 0xff;
dst_y[x + 1] = pred[0] = (y2 + pred[0]) & 0xff;
dst_v[x / 2] = pred[2] = (v + pred[2]) & 0xff;
}
}
dst_y += p->linesize[0];
dst_u += p->linesize[1];
dst_v += p->linesize[2];
for (y = 1; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x += 2) {
dst_y[x ] = get_bits(gb, 8);
dst_u[x / 2] = get_bits(gb, 8);
dst_y[x + 1] = get_bits(gb, 8);
dst_v[x / 2] = get_bits(gb, 8);
}
} else {
int pred_L[4];
int y1, y2, u, v;
pred_L[0] = dst_y[-p->linesize[0]];
pred_L[1] = dst_u[-p->linesize[1]];
pred_L[2] = dst_v[-p->linesize[2]];
for (x = 0; x < avctx->width; x += 2) {
y1 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y2 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x ] = pred_L[0] = (y1 + pred_L[0]) & 0xff;
dst_u[x / 2] = pred_L[1] = (u + pred_L[1]) & 0xff;
dst_y[x + 1] = pred_L[0] = (y2 + pred_L[0]) & 0xff;
dst_v[x / 2] = pred_L[2] = (v + pred_L[2]) & 0xff;
}
}
dst_y += p->linesize[0];
dst_u += p->linesize[1];
dst_v += p->linesize[2];
}
}
static void decode_byry(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint8_t *dst_y, *dst_u, *dst_v;
int x, y;
dst_y = p->data[0];
dst_u = p->data[1];
dst_v = p->data[2];
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x += 2) {
dst_y[x ] = get_bits(gb, 8);
dst_u[x / 2] = get_bits(gb, 8);
dst_y[x + 1] = get_bits(gb, 8);
dst_v[x / 2] = get_bits(gb, 8);
}
} else {
int pred[4] = { 125, -128, -128, 0 };
for (x = 0; x < avctx->width; x += 2) {
int y1, y2, u, v;
y1 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y2 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x ] = pred[0] = (y1 + pred[0]) & 0xff;
dst_u[x / 2] = pred[1] = (u + pred[1]) & 0xff;
dst_y[x + 1] = pred[0] = (y2 + pred[0]) & 0xff;
dst_v[x / 2] = pred[2] = (v + pred[2]) & 0xff;
}
}
dst_y += p->linesize[0];
dst_u += p->linesize[1];
dst_v += p->linesize[2];
for (y = 1; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x += 2) {
dst_y[x ] = get_bits(gb, 8);
dst_u[x / 2] = get_bits(gb, 8);
dst_y[x + 1] = get_bits(gb, 8);
dst_v[x / 2] = get_bits(gb, 8);
}
} else {
int pred_TL[4], pred_L[4], pred_T[4];
int y1, y2, u, v;
pred_TL[0] = pred_L[0] = dst_y[-p->linesize[0]];
pred_TL[1] = pred_L[1] = dst_u[-p->linesize[1]];
pred_TL[2] = pred_L[2] = dst_v[-p->linesize[2]];
for (x = 0; x < avctx->width; x += 2) {
pred_T[0] = dst_y[-p->linesize[0] + x];
pred_T[3] = dst_y[-p->linesize[0] + x + 1];
pred_T[1] = dst_u[-p->linesize[1] + x / 2];
pred_T[2] = dst_v[-p->linesize[2] + x / 2];
y1 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y2 = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x ] = pred_L[0] = (y1 + ((3 * (pred_T[0] + pred_L[0]) - 2 * pred_TL[0]) >> 2)) & 0xff;
dst_u[x / 2] = pred_L[1] = (u + (((pred_L[1] - pred_TL[1]) >> 1) + pred_T[1])) & 0xff;
dst_y[x + 1] = pred_L[0] = (y2 + ((3 * (pred_T[3] + pred_L[0]) - 2 * pred_T[0]) >> 2)) & 0xff;
dst_v[x / 2] = pred_L[2] = (v + (((pred_L[2] - pred_TL[2]) >> 1) + pred_T[2])) & 0xff;
pred_TL[0] = pred_T[3];
pred_TL[1] = pred_T[1];
pred_TL[2] = pred_T[2];
}
}
dst_y += p->linesize[0];
dst_u += p->linesize[1];
dst_v += p->linesize[2];
}
}
static void decode_ybri(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint8_t *dst_y, *dst_u, *dst_v;
int x, y;
dst_y = p->data[0];
dst_u = p->data[1];
dst_v = p->data[2];
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_y[x] = get_bits(gb, 8);
dst_u[x] = get_bits(gb, 8);
dst_v[x] = get_bits(gb, 8);
}
} else {
int pred[4] = { s->alt ? 125 : -146, -128, -128, -128 };
for (x = 0; x < avctx->width; x++) {
int y, u, v;
y = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x] = pred[0] = (y + pred[0]) & 0xff;
dst_u[x] = pred[1] = (u + pred[1]) & 0xff;
dst_v[x] = pred[2] = (v + pred[2]) & 0xff;
}
}
dst_y += p->linesize[0];
dst_u += p->linesize[1];
dst_v += p->linesize[2];
for (y = 1; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_y[x] = get_bits(gb, 8);
dst_u[x] = get_bits(gb, 8);
dst_v[x] = get_bits(gb, 8);
}
} else {
int pred_L[4];
int y, u, v;
pred_L[0] = dst_y[-p->linesize[0]];
pred_L[1] = dst_u[-p->linesize[1]];
pred_L[2] = dst_v[-p->linesize[2]];
for (x = 0; x < avctx->width; x++) {
y = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x] = pred_L[0] = (y + pred_L[0]) & 0xff;
dst_u[x] = pred_L[1] = (u + pred_L[1]) & 0xff;
dst_v[x] = pred_L[2] = (v + pred_L[2]) & 0xff;
}
}
dst_y += p->linesize[0];
dst_u += p->linesize[1];
dst_v += p->linesize[2];
}
}
static void decode_ybr(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint8_t *dst_y, *dst_u, *dst_v;
int x, y;
dst_y = p->data[0];
dst_u = p->data[1];
dst_v = p->data[2];
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_y[x] = get_bits(gb, 8);
dst_u[x] = get_bits(gb, 8);
dst_v[x] = get_bits(gb, 8);
}
} else {
int pred[4] = { s->alt ? 125 : -146, -128, -128, -128 };
for (x = 0; x < avctx->width; x++) {
int y, u, v;
y = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x] = pred[0] = (y + pred[0]) & 0xff;
dst_u[x] = pred[1] = (u + pred[1]) & 0xff;
dst_v[x] = pred[2] = (v + pred[2]) & 0xff;
}
}
dst_y += p->linesize[0];
dst_u += p->linesize[1];
dst_v += p->linesize[2];
for (y = 1; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_y[x] = get_bits(gb, 8);
dst_u[x] = get_bits(gb, 8);
dst_v[x] = get_bits(gb, 8);
}
} else {
int pred_TL[4], pred_L[4], pred_T[4];
int y, u, v;
pred_TL[0] = pred_L[0] = dst_y[-p->linesize[0]];
pred_TL[1] = pred_L[1] = dst_u[-p->linesize[1]];
pred_TL[2] = pred_L[2] = dst_v[-p->linesize[2]];
for (x = 0; x < avctx->width; x++) {
pred_T[0] = dst_y[-p->linesize[0] + x];
pred_T[1] = dst_u[-p->linesize[1] + x];
pred_T[2] = dst_v[-p->linesize[2] + x];
y = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_y[x] = pred_L[0] = (y + ((3 * (pred_T[0] + pred_L[0]) - 2 * pred_TL[0]) >> 2)) & 0xff;
dst_u[x] = pred_L[1] = (u + ((3 * (pred_T[1] + pred_L[1]) - 2 * pred_TL[1]) >> 2)) & 0xff;
dst_v[x] = pred_L[2] = (v + ((3 * (pred_T[2] + pred_L[2]) - 2 * pred_TL[2]) >> 2)) & 0xff;
pred_TL[0] = pred_T[0];
pred_TL[1] = pred_T[1];
pred_TL[2] = pred_T[2];
}
}
dst_y += p->linesize[0];
dst_u += p->linesize[1];
dst_v += p->linesize[2];
}
}
static void decode_aybri(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint8_t *dst_a, *dst_y, *dst_u, *dst_v;
int x, y;
dst_a = p->data[3];
dst_y = p->data[0];
dst_u = p->data[1];
dst_v = p->data[2];
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_a[x] = get_bits(gb, 8);
dst_y[x] = get_bits(gb, 8);
dst_u[x] = get_bits(gb, 8);
dst_v[x] = get_bits(gb, 8);
}
} else {
int pred[4] = { 125, s->alt ? 125 : -146, -128, -128 };
for (x = 0; x < avctx->width; x++) {
int a, y, u, v;
a = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_a[x] = pred[0] = (a + pred[0]) & 0xff;
dst_y[x] = pred[1] = (y + pred[1]) & 0xff;
dst_u[x] = pred[2] = (u + pred[2]) & 0xff;
dst_v[x] = pred[3] = (v + pred[3]) & 0xff;
}
}
dst_a += p->linesize[3];
dst_y += p->linesize[0];
dst_u += p->linesize[1];
dst_v += p->linesize[2];
for (y = 1; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_a[x] = get_bits(gb, 8);
dst_y[x] = get_bits(gb, 8);
dst_u[x] = get_bits(gb, 8);
dst_v[x] = get_bits(gb, 8);
}
} else {
int pred_L[4];
int a, y, u, v;
pred_L[0] = dst_a[-p->linesize[3]];
pred_L[1] = dst_y[-p->linesize[0]];
pred_L[2] = dst_u[-p->linesize[1]];
pred_L[3] = dst_v[-p->linesize[2]];
for (x = 0; x < avctx->width; x++) {
a = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_a[x] = pred_L[0] = (a + pred_L[0]) & 0xff;
dst_y[x] = pred_L[1] = (y + pred_L[1]) & 0xff;
dst_u[x] = pred_L[2] = (u + pred_L[2]) & 0xff;
dst_v[x] = pred_L[3] = (v + pred_L[3]) & 0xff;
}
}
dst_a += p->linesize[3];
dst_y += p->linesize[0];
dst_u += p->linesize[1];
dst_v += p->linesize[2];
}
}
static void decode_aybr(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint8_t *dst_a, *dst_y, *dst_u, *dst_v;
int x, y;
dst_a = p->data[3];
dst_y = p->data[0];
dst_u = p->data[1];
dst_v = p->data[2];
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_a[x] = get_bits(gb, 8);
dst_y[x] = get_bits(gb, 8);
dst_u[x] = get_bits(gb, 8);
dst_v[x] = get_bits(gb, 8);
}
} else {
int pred[4] = { 125, s->alt ? 125 : -146, -128, -128 };
for (x = 0; x < avctx->width; x++) {
int a, y, u, v;
a = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_a[x] = pred[0] = (a + pred[0]) & 0xff;
dst_y[x] = pred[1] = (y + pred[1]) & 0xff;
dst_u[x] = pred[2] = (u + pred[2]) & 0xff;
dst_v[x] = pred[3] = (v + pred[3]) & 0xff;
}
}
dst_a += p->linesize[3];
dst_y += p->linesize[0];
dst_u += p->linesize[1];
dst_v += p->linesize[2];
for (y = 1; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_a[x] = get_bits(gb, 8);
dst_y[x] = get_bits(gb, 8);
dst_u[x] = get_bits(gb, 8);
dst_v[x] = get_bits(gb, 8);
}
} else {
int pred_TL[4], pred_L[4], pred_T[4];
int a, y, u, v;
pred_TL[0] = pred_L[0] = dst_a[-p->linesize[3]];
pred_TL[1] = pred_L[1] = dst_y[-p->linesize[0]];
pred_TL[2] = pred_L[2] = dst_u[-p->linesize[1]];
pred_TL[3] = pred_L[3] = dst_v[-p->linesize[2]];
for (x = 0; x < avctx->width; x++) {
pred_T[0] = dst_a[-p->linesize[3] + x];
pred_T[1] = dst_y[-p->linesize[0] + x];
pred_T[2] = dst_u[-p->linesize[1] + x];
pred_T[3] = dst_v[-p->linesize[2] + x];
a = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
y = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
u = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
v = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_a[x] = pred_L[0] = (a + ((3 * (pred_T[0] + pred_L[0]) - 2 * pred_TL[0]) >> 2)) & 0xff;
dst_y[x] = pred_L[1] = (y + ((3 * (pred_T[1] + pred_L[1]) - 2 * pred_TL[1]) >> 2)) & 0xff;
dst_u[x] = pred_L[2] = (u + ((3 * (pred_T[2] + pred_L[2]) - 2 * pred_TL[2]) >> 2)) & 0xff;
dst_v[x] = pred_L[3] = (v + ((3 * (pred_T[3] + pred_L[3]) - 2 * pred_TL[3]) >> 2)) & 0xff;
pred_TL[0] = pred_T[0];
pred_TL[1] = pred_T[1];
pred_TL[2] = pred_T[2];
pred_TL[3] = pred_T[3];
}
}
dst_a += p->linesize[3];
dst_y += p->linesize[0];
dst_u += p->linesize[1];
dst_v += p->linesize[2];
}
}
static void decode_argxi(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint16_t *dst_r, *dst_g, *dst_b, *dst_a;
int x, y;
dst_r = (uint16_t *)p->data[2];
dst_g = (uint16_t *)p->data[0];
dst_b = (uint16_t *)p->data[1];
dst_a = (uint16_t *)p->data[3];
for (y = 0; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_a[x] = get_bits(gb, 10);
dst_r[x] = get_bits(gb, 10);
dst_g[x] = get_bits(gb, 10);
dst_b[x] = get_bits(gb, 10);
}
} else {
int pred[4] = { 512, 512, 512, 512 };
for (x = 0; x < avctx->width; x++) {
int r, g, b, a;
a = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
r = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
g = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
b = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_a[x] = pred[3] = (a + pred[3]) & 0x3ff;
dst_r[x] = pred[0] = (r + pred[0]) & 0x3ff;
dst_g[x] = pred[1] = (r + g + pred[1]) & 0x3ff;
dst_b[x] = pred[2] = (r + g + b + pred[2]) & 0x3ff;
}
}
dst_r += p->linesize[2] / 2;
dst_g += p->linesize[0] / 2;
dst_b += p->linesize[1] / 2;
dst_a += p->linesize[3] / 2;
}
}
static void decode_argx(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint16_t *dst_r, *dst_g, *dst_b, *dst_a;
int x, y;
dst_r = (uint16_t *)p->data[2];
dst_g = (uint16_t *)p->data[0];
dst_b = (uint16_t *)p->data[1];
dst_a = (uint16_t *)p->data[3];
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_a[x] = get_bits(gb, 10);
dst_r[x] = get_bits(gb, 10);
dst_g[x] = get_bits(gb, 10);
dst_b[x] = get_bits(gb, 10);
}
} else {
int pred[4] = { 512, 512, 512, 512 };
for (x = 0; x < avctx->width; x++) {
int r, g, b, a;
a = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
r = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
g = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
b = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_a[x] = pred[3] = (a + pred[3]) & 0x3ff;
dst_r[x] = pred[0] = (r + pred[0]) & 0x3ff;
dst_g[x] = pred[1] = (r + g + pred[1]) & 0x3ff;
dst_b[x] = pred[2] = (r + g + b + pred[2]) & 0x3ff;
}
}
dst_r += p->linesize[2] / 2;
dst_g += p->linesize[0] / 2;
dst_b += p->linesize[1] / 2;
dst_a += p->linesize[3] / 2;
for (y = 1; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_a[x] = get_bits(gb, 10);
dst_r[x] = get_bits(gb, 10);
dst_g[x] = get_bits(gb, 10);
dst_b[x] = get_bits(gb, 10);
}
} else {
int pred_TL[4], pred_L[4], pred_T[4];
int r, g, b, a;
pred_TL[0] = pred_L[0] = dst_r[-p->linesize[2] / 2];
pred_TL[1] = pred_L[1] = dst_g[-p->linesize[0] / 2];
pred_TL[2] = pred_L[2] = dst_b[-p->linesize[1] / 2];
pred_TL[3] = pred_L[3] = dst_a[-p->linesize[3] / 2];
for (x = 0; x < avctx->width; x++) {
pred_T[0] = dst_r[-p->linesize[2] / 2 + x];
pred_T[1] = dst_g[-p->linesize[0] / 2 + x];
pred_T[2] = dst_b[-p->linesize[1] / 2 + x];
pred_T[3] = dst_a[-p->linesize[3] / 2 + x];
a = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
r = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
g = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
b = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_a[x] = pred_L[3] = (a + ((3 * (pred_T[3] + pred_L[3]) - 2 * pred_TL[3]) >> 2)) & 0x3ff;
dst_r[x] = pred_L[0] = (r + ((3 * (pred_T[0] + pred_L[0]) - 2 * pred_TL[0]) >> 2)) & 0x3ff;
dst_g[x] = pred_L[1] = (r + g + ((3 * (pred_T[1] + pred_L[1]) - 2 * pred_TL[1]) >> 2)) & 0x3ff;
dst_b[x] = pred_L[2] = (r + g + b + ((3 * (pred_T[2] + pred_L[2]) - 2 * pred_TL[2]) >> 2)) & 0x3ff;
pred_TL[0] = pred_T[0];
pred_TL[1] = pred_T[1];
pred_TL[2] = pred_T[2];
pred_TL[3] = pred_T[3];
}
}
dst_r += p->linesize[2] / 2;
dst_g += p->linesize[0] / 2;
dst_b += p->linesize[1] / 2;
dst_a += p->linesize[3] / 2;
}
}
static void decode_rgbxi(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint16_t *dst_r, *dst_g, *dst_b;
int x, y;
dst_r = (uint16_t *)p->data[2];
dst_g = (uint16_t *)p->data[0];
dst_b = (uint16_t *)p->data[1];
for (y = 0; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_r[x] = get_bits(gb, 10);
dst_g[x] = get_bits(gb, 10);
dst_b[x] = get_bits(gb, 10);
}
} else {
int pred[4] = { 512, 512, 512, 0 };
for (x = 0; x < avctx->width; x++) {
int r, g, b;
r = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
g = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
b = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_r[x] = pred[0] = (r + pred[0]) & 0x3ff;
dst_g[x] = pred[1] = (r + g + pred[1]) & 0x3ff;
dst_b[x] = pred[2] = (r + g + b + pred[2]) & 0x3ff;
}
}
dst_r += p->linesize[2] / 2;
dst_g += p->linesize[0] / 2;
dst_b += p->linesize[1] / 2;
}
}
static void decode_rgbx(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint16_t *dst_r, *dst_g, *dst_b;
int x, y;
dst_r = (uint16_t *)p->data[2];
dst_g = (uint16_t *)p->data[0];
dst_b = (uint16_t *)p->data[1];
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_r[x] = get_bits(gb, 10);
dst_g[x] = get_bits(gb, 10);
dst_b[x] = get_bits(gb, 10);
}
} else {
int pred[4] = { 512, 512, 512, 0 };
for (x = 0; x < avctx->width; x++) {
int r, g, b;
r = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
g = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
b = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_r[x] = pred[0] = (r + pred[0]) & 0x3ff;
dst_g[x] = pred[1] = (r + g + pred[1]) & 0x3ff;
dst_b[x] = pred[2] = (r + g + b + pred[2]) & 0x3ff;
}
}
dst_r += p->linesize[2] / 2;
dst_g += p->linesize[0] / 2;
dst_b += p->linesize[1] / 2;
for (y = 1; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst_r[x] = get_bits(gb, 10);
dst_g[x] = get_bits(gb, 10);
dst_b[x] = get_bits(gb, 10);
}
} else {
int pred_TL[4], pred_L[4], pred_T[4];
int r, g, b;
pred_TL[0] = pred_L[0] = dst_r[-p->linesize[2] / 2];
pred_TL[1] = pred_L[1] = dst_g[-p->linesize[0] / 2];
pred_TL[2] = pred_L[2] = dst_b[-p->linesize[1] / 2];
for (x = 0; x < avctx->width; x++) {
pred_T[0] = dst_r[-p->linesize[2] / 2 + x];
pred_T[1] = dst_g[-p->linesize[0] / 2 + x];
pred_T[2] = dst_b[-p->linesize[1] / 2 + x];
r = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
g = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
b = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst_r[x] = pred_L[0] = (r + ((3 * (pred_T[0] + pred_L[0]) - 2 * pred_TL[0]) >> 2)) & 0x3ff;
dst_g[x] = pred_L[1] = (r + g + ((3 * (pred_T[1] + pred_L[1]) - 2 * pred_TL[1]) >> 2)) & 0x3ff;
dst_b[x] = pred_L[2] = (r + g + b + ((3 * (pred_T[2] + pred_L[2]) - 2 * pred_TL[2]) >> 2)) & 0x3ff;
pred_TL[0] = pred_T[0];
pred_TL[1] = pred_T[1];
pred_TL[2] = pred_T[2];
}
}
dst_r += p->linesize[2] / 2;
dst_g += p->linesize[0] / 2;
dst_b += p->linesize[1] / 2;
}
}
static void decode_argbi(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint8_t *dst;
int x, y;
dst = p->data[0];
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst[x * 4 + 0] = get_bits(gb, 8);
dst[x * 4 + 1] = get_bits(gb, 8);
dst[x * 4 + 2] = get_bits(gb, 8);
dst[x * 4 + 3] = get_bits(gb, 8);
}
} else {
int pred[4] = { -128, -128, -128, -128 };
for (x = 0; x < avctx->width; x++) {
int a, r, g, b;
a = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
r = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
g = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
b = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst[4 * x + 0] = pred[0] = (a + pred[0]) & 0xff;
dst[4 * x + 1] = pred[1] = (r + pred[1]) & 0xff;
dst[4 * x + 2] = pred[2] = (r + g + pred[2]) & 0xff;
dst[4 * x + 3] = pred[3] = (r + g + b + pred[3]) & 0xff;
}
}
dst += p->linesize[0];
for (y = 1; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst[x * 4 + 0] = get_bits(gb, 8);
dst[x * 4 + 1] = get_bits(gb, 8);
dst[x * 4 + 2] = get_bits(gb, 8);
dst[x * 4 + 3] = get_bits(gb, 8);
}
} else {
int pred_L[4];
int a, r, g, b;
pred_L[0] = dst[-p->linesize[0] + 0];
pred_L[1] = dst[-p->linesize[0] + 1];
pred_L[2] = dst[-p->linesize[0] + 2];
pred_L[3] = dst[-p->linesize[0] + 3];
for (x = 0; x < avctx->width; x++) {
a = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
r = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
g = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
b = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst[4 * x + 0] = pred_L[0] = (a + pred_L[0]) & 0xff;
dst[4 * x + 1] = pred_L[1] = (r + pred_L[1]) & 0xff;
dst[4 * x + 2] = pred_L[2] = (r + g + pred_L[2]) & 0xff;
dst[4 * x + 3] = pred_L[3] = (r + g + b + pred_L[3]) & 0xff;
}
}
dst += p->linesize[0];
}
}
static void decode_argb(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint8_t *dst;
int x, y;
dst = p->data[0];
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst[x * 4 + 0] = get_bits(gb, 8);
dst[x * 4 + 1] = get_bits(gb, 8);
dst[x * 4 + 2] = get_bits(gb, 8);
dst[x * 4 + 3] = get_bits(gb, 8);
}
} else {
int pred[4] = { -128, -128, -128, -128 };
for (x = 0; x < avctx->width; x++) {
int a, r, g, b;
a = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
r = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
g = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
b = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst[4 * x + 0] = pred[0] = (a + pred[0]) & 0xff;
dst[4 * x + 1] = pred[1] = (r + pred[1]) & 0xff;
dst[4 * x + 2] = pred[2] = (r + g + pred[2]) & 0xff;
dst[4 * x + 3] = pred[3] = (r + g + b + pred[3]) & 0xff;
}
}
dst += p->linesize[0];
for (y = 1; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst[x * 4 + 0] = get_bits(gb, 8);
dst[x * 4 + 1] = get_bits(gb, 8);
dst[x * 4 + 2] = get_bits(gb, 8);
dst[x * 4 + 3] = get_bits(gb, 8);
}
} else {
int pred_TL[4], pred_L[4], pred_T[4];
int a, r, g, b;
pred_TL[0] = pred_L[0] = dst[-p->linesize[0] + 0];
pred_TL[1] = pred_L[1] = dst[-p->linesize[0] + 1];
pred_TL[2] = pred_L[2] = dst[-p->linesize[0] + 2];
pred_TL[3] = pred_L[3] = dst[-p->linesize[0] + 3];
for (x = 0; x < avctx->width; x++) {
pred_T[0] = dst[-p->linesize[0] + 4 * x + 0];
pred_T[1] = dst[-p->linesize[0] + 4 * x + 1];
pred_T[2] = dst[-p->linesize[0] + 4 * x + 2];
pred_T[3] = dst[-p->linesize[0] + 4 * x + 3];
a = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
r = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
g = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
b = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst[4 * x + 0] = pred_L[0] = (a + ((3 * (pred_T[0] + pred_L[0]) - 2 * pred_TL[0]) >> 2)) & 0xff;
dst[4 * x + 1] = pred_L[1] = (r + ((3 * (pred_T[1] + pred_L[1]) - 2 * pred_TL[1]) >> 2)) & 0xff;
dst[4 * x + 2] = pred_L[2] = (r + g + ((3 * (pred_T[2] + pred_L[2]) - 2 * pred_TL[2]) >> 2)) & 0xff;
dst[4 * x + 3] = pred_L[3] = (r + g + b + ((3 * (pred_T[3] + pred_L[3]) - 2 * pred_TL[3]) >> 2)) & 0xff;
pred_TL[0] = pred_T[0];
pred_TL[1] = pred_T[1];
pred_TL[2] = pred_T[2];
pred_TL[3] = pred_T[3];
}
}
dst += p->linesize[0];
}
}
static void decode_rgbi(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint8_t *dst;
int x, y;
dst = p->data[0];
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst[x * 4 + 0] = get_bits(gb, 8);
dst[x * 4 + 1] = get_bits(gb, 8);
dst[x * 4 + 2] = get_bits(gb, 8);
}
} else {
int pred[4] = { -128, -128, -128, -128 };
for (x = 0; x < avctx->width; x++) {
int r, g, b;
r = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
g = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
b = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst[4 * x + 0] = pred[0] = (r + pred[0]) & 0xff;
dst[4 * x + 1] = pred[1] = (r + g + pred[1]) & 0xff;
dst[4 * x + 2] = pred[2] = (r + g + b + pred[2]) & 0xff;
}
}
dst += p->linesize[0];
for (y = 1; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst[x * 4 + 0] = get_bits(gb, 8);
dst[x * 4 + 1] = get_bits(gb, 8);
dst[x * 4 + 2] = get_bits(gb, 8);
}
} else {
int pred_L[4];
int r, g, b;
pred_L[0] = dst[-p->linesize[0] + 0];
pred_L[1] = dst[-p->linesize[0] + 1];
pred_L[2] = dst[-p->linesize[0] + 2];
for (x = 0; x < avctx->width; x++) {
r = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
g = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
b = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst[4 * x + 0] = pred_L[0] = (r + pred_L[0]) & 0xff;
dst[4 * x + 1] = pred_L[1] = (r + g + pred_L[1]) & 0xff;
dst[4 * x + 2] = pred_L[2] = (r + g + b + pred_L[2]) & 0xff;
}
}
dst += p->linesize[0];
}
}
static void decode_rgb(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
{
SheerVideoContext *s = avctx->priv_data;
uint8_t *dst;
int x, y;
dst = p->data[0];
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst[x * 4 + 0] = get_bits(gb, 8);
dst[x * 4 + 1] = get_bits(gb, 8);
dst[x * 4 + 2] = get_bits(gb, 8);
}
} else {
int pred[4] = { -128, -128, -128, -128 };
for (x = 0; x < avctx->width; x++) {
int r, g, b;
r = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
g = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
b = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst[4 * x + 0] = pred[0] = (r + pred[0]) & 0xff;
dst[4 * x + 1] = pred[1] = (r + g + pred[1]) & 0xff;
dst[4 * x + 2] = pred[2] = (r + g + b + pred[2]) & 0xff;
}
}
dst += p->linesize[0];
for (y = 1; y < avctx->height; y++) {
if (get_bits1(gb)) {
for (x = 0; x < avctx->width; x++) {
dst[x * 4 + 0] = get_bits(gb, 8);
dst[x * 4 + 1] = get_bits(gb, 8);
dst[x * 4 + 2] = get_bits(gb, 8);
}
} else {
int pred_TL[4], pred_L[4], pred_T[4];
int r, g, b;
pred_TL[0] = pred_L[0] = dst[-p->linesize[0] + 0];
pred_TL[1] = pred_L[1] = dst[-p->linesize[0] + 1];
pred_TL[2] = pred_L[2] = dst[-p->linesize[0] + 2];
for (x = 0; x < avctx->width; x++) {
pred_T[0] = dst[-p->linesize[0] + 4 * x + 0];
pred_T[1] = dst[-p->linesize[0] + 4 * x + 1];
pred_T[2] = dst[-p->linesize[0] + 4 * x + 2];
r = get_vlc2(gb, s->vlc[0].table, SHEER_VLC_BITS, 2);
g = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
b = get_vlc2(gb, s->vlc[1].table, SHEER_VLC_BITS, 2);
dst[4 * x + 0] = pred_L[0] = (r + ((3 * (pred_T[0] + pred_L[0]) - 2 * pred_TL[0]) >> 2)) & 0xff;
dst[4 * x + 1] = pred_L[1] = (r + g + ((3 * (pred_T[1] + pred_L[1]) - 2 * pred_TL[1]) >> 2)) & 0xff;
dst[4 * x + 2] = pred_L[2] = (r + g + b + ((3 * (pred_T[2] + pred_L[2]) - 2 * pred_TL[2]) >> 2)) & 0xff;
pred_TL[0] = pred_T[0];
pred_TL[1] = pred_T[1];
pred_TL[2] = pred_T[2];
}
}
dst += p->linesize[0];
}
}
static av_cold int build_vlc(VLC *vlc, const SheerTable *table)
{
const uint8_t *cur = table->lens;
uint8_t lens[1024];
unsigned count = 0;
for (int step = 1, len = 1; len > 0; len += step) {
unsigned new_count = count;
if (len == 16) {
new_count += table->nb_16s;
step = -1;
} else
new_count += *cur++;
for (; count < new_count; count++)
lens[count] = len;
}
ff_free_vlc(vlc);
return ff_init_vlc_from_lengths(vlc, SHEER_VLC_BITS, count,
lens, sizeof(*lens), NULL, 0, 0, 0, 0, NULL);
}
static int decode_frame(AVCodecContext *avctx,
void *data, int *got_frame,
AVPacket *avpkt)
{
SheerVideoContext *s = avctx->priv_data;
ThreadFrame frame = { .f = data };
const SheerTable *table;
AVFrame *p = data;
GetBitContext gb;
unsigned format;
int ret;
if (avpkt->size <= 20)
return AVERROR_INVALIDDATA;
if (AV_RL32(avpkt->data) != MKTAG('S','h','i','r') &&
AV_RL32(avpkt->data) != MKTAG('Z','w','a','k'))
return AVERROR_INVALIDDATA;
s->alt = 0;
format = AV_RL32(avpkt->data + 16);
av_log(avctx, AV_LOG_DEBUG, "format: %s\n", av_fourcc2str(format));
switch (format) {
case MKTAG(' ', 'R', 'G', 'B'):
avctx->pix_fmt = AV_PIX_FMT_RGB0;
s->decode_frame = decode_rgb;
table = rgb;
break;
case MKTAG(' ', 'r', 'G', 'B'):
avctx->pix_fmt = AV_PIX_FMT_RGB0;
s->decode_frame = decode_rgbi;
table = rgbi;
break;
case MKTAG('A', 'R', 'G', 'X'):
avctx->pix_fmt = AV_PIX_FMT_GBRAP10;
s->decode_frame = decode_argx;
table = rgbx;
break;
case MKTAG('A', 'r', 'G', 'X'):
avctx->pix_fmt = AV_PIX_FMT_GBRAP10;
s->decode_frame = decode_argxi;
table = rgbxi;
break;
case MKTAG('R', 'G', 'B', 'X'):
avctx->pix_fmt = AV_PIX_FMT_GBRP10;
s->decode_frame = decode_rgbx;
table = rgbx;
break;
case MKTAG('r', 'G', 'B', 'X'):
avctx->pix_fmt = AV_PIX_FMT_GBRP10;
s->decode_frame = decode_rgbxi;
table = rgbxi;
break;
case MKTAG('A', 'R', 'G', 'B'):
avctx->pix_fmt = AV_PIX_FMT_ARGB;
s->decode_frame = decode_argb;
table = rgb;
break;
case MKTAG('A', 'r', 'G', 'B'):
avctx->pix_fmt = AV_PIX_FMT_ARGB;
s->decode_frame = decode_argbi;
table = rgbi;
break;
case MKTAG('A', 'Y', 'B', 'R'):
s->alt = 1;
case MKTAG('A', 'Y', 'b', 'R'):
avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
s->decode_frame = decode_aybr;
table = ybr;
break;
case MKTAG('A', 'y', 'B', 'R'):
s->alt = 1;
case MKTAG('A', 'y', 'b', 'R'):
avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
s->decode_frame = decode_aybri;
table = ybri;
break;
case MKTAG(' ', 'Y', 'B', 'R'):
s->alt = 1;
case MKTAG(' ', 'Y', 'b', 'R'):
avctx->pix_fmt = AV_PIX_FMT_YUV444P;
s->decode_frame = decode_ybr;
table = ybr;
break;
case MKTAG(' ', 'y', 'B', 'R'):
s->alt = 1;
case MKTAG(' ', 'y', 'b', 'R'):
avctx->pix_fmt = AV_PIX_FMT_YUV444P;
s->decode_frame = decode_ybri;
table = ybri;
break;
case MKTAG('Y', 'B', 'R', 0x0a):
avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
s->decode_frame = decode_ybr10;
table = ybr10;
break;
case MKTAG('y', 'B', 'R', 0x0a):
avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
s->decode_frame = decode_ybr10i;
table = ybr10i;
break;
case MKTAG('C', 'A', '4', 'p'):
avctx->pix_fmt = AV_PIX_FMT_YUVA444P10;
s->decode_frame = decode_ca4p;
table = ybr10;
break;
case MKTAG('C', 'A', '4', 'i'):
avctx->pix_fmt = AV_PIX_FMT_YUVA444P10;
s->decode_frame = decode_ca4i;
table = ybr10i;
break;
case MKTAG('B', 'Y', 'R', 'Y'):
avctx->pix_fmt = AV_PIX_FMT_YUV422P;
s->decode_frame = decode_byry;
table = byry;
break;
case MKTAG('B', 'Y', 'R', 'y'):
avctx->pix_fmt = AV_PIX_FMT_YUV422P;
s->decode_frame = decode_byryi;
table = byryi;
break;
case MKTAG('Y', 'b', 'Y', 'r'):
avctx->pix_fmt = AV_PIX_FMT_YUV422P;
s->decode_frame = decode_ybyr;
table = ybyr;
break;
case MKTAG('C', '8', '2', 'p'):
avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
s->decode_frame = decode_c82p;
table = byry;
break;
case MKTAG('C', '8', '2', 'i'):
avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
s->decode_frame = decode_c82i;
table = byryi;
break;
case MKTAG(0xa2, 'Y', 'R', 'Y'):
avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
s->decode_frame = decode_yry10;
table = yry10;
break;
case MKTAG(0xa2, 'Y', 'R', 'y'):
avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
s->decode_frame = decode_yry10i;
table = yry10i;
break;
case MKTAG('C', 'A', '2', 'p'):
avctx->pix_fmt = AV_PIX_FMT_YUVA422P10;
s->decode_frame = decode_ca2p;
table = yry10;
break;
case MKTAG('C', 'A', '2', 'i'):
avctx->pix_fmt = AV_PIX_FMT_YUVA422P10;
s->decode_frame = decode_ca2i;
table = yry10i;
break;
default:
avpriv_request_sample(avctx, "unsupported format: 0x%X", format);
return AVERROR_PATCHWELCOME;
}
if (s->format != format) {
if ((ret = build_vlc(&s->vlc[0], &table[0])) < 0 ||
(ret = build_vlc(&s->vlc[1], &table[1])) < 0) {
s->format = 0;
return ret;
}
s->format = format;
}
if (avpkt->size < 20 + avctx->width * avctx->height / 16) {
av_log(avctx, AV_LOG_ERROR, "Input packet too small\n");
return AVERROR_INVALIDDATA;
}
p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;
if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
return ret;
if ((ret = init_get_bits8(&gb, avpkt->data + 20, avpkt->size - 20)) < 0)
return ret;
s->decode_frame(avctx, p, &gb);
*got_frame = 1;
return avpkt->size;
}
static av_cold int decode_end(AVCodecContext *avctx)
{
SheerVideoContext *s = avctx->priv_data;
ff_free_vlc(&s->vlc[0]);
ff_free_vlc(&s->vlc[1]);
return 0;
}
const AVCodec ff_sheervideo_decoder = {
.name = "sheervideo",
.long_name = NULL_IF_CONFIG_SMALL("BitJazz SheerVideo"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_SHEERVIDEO,
.priv_data_size = sizeof(SheerVideoContext),
.close = decode_end,
.decode = decode_frame,
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
};