mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-12-07 22:08:25 -05:00
918 lines
29 KiB
C
Executable File
918 lines
29 KiB
C
Executable File
/*
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* ClearVideo decoder
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* Copyright (c) 2012-2018 Konstantin Shishkov
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* ClearVideo decoder
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*/
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#include "avcodec.h"
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#include "bytestream.h"
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#include "get_bits.h"
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#include "idctdsp.h"
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#include "internal.h"
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#include "mathops.h"
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#include "clearvideodata.h"
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typedef struct LevelCodes {
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uint16_t mv_esc;
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uint16_t bias_esc;
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VLC flags_cb;
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VLC mv_cb;
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VLC bias_cb;
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} LevelCodes;
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typedef struct MV {
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int16_t x, y;
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} MV;
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static const MV zero_mv = { 0 };
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typedef struct MVInfo {
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int mb_w;
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int mb_h;
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int mb_size;
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int mb_stride;
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int top;
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MV *mv;
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} MVInfo;
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typedef struct TileInfo {
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uint16_t flags;
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int16_t bias;
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MV mv;
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struct TileInfo *child[4];
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} TileInfo;
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typedef struct CLVContext {
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AVCodecContext *avctx;
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IDCTDSPContext idsp;
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AVFrame *pic;
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AVFrame *prev;
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GetBitContext gb;
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int mb_width, mb_height;
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int pmb_width, pmb_height;
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MVInfo mvi;
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int tile_size;
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int tile_shift;
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VLC dc_vlc, ac_vlc;
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LevelCodes ylev[4], ulev[3], vlev[3];
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int luma_dc_quant, chroma_dc_quant, ac_quant;
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DECLARE_ALIGNED(16, int16_t, block)[64];
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int top_dc[3], left_dc[4];
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} CLVContext;
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static inline int decode_block(CLVContext *ctx, int16_t *blk, int has_ac,
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int ac_quant)
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{
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GetBitContext *gb = &ctx->gb;
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int idx = 1, last = 0, val, skip;
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memset(blk, 0, sizeof(*blk) * 64);
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blk[0] = get_vlc2(gb, ctx->dc_vlc.table, 9, 3);
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if (blk[0] < 0)
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return AVERROR_INVALIDDATA;
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blk[0] -= 63;
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if (!has_ac)
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return 0;
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while (idx < 64 && !last) {
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val = get_vlc2(gb, ctx->ac_vlc.table, 9, 2);
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if (val < 0)
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return AVERROR_INVALIDDATA;
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if (val != 0x1BFF) {
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last = val >> 12;
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skip = (val >> 4) & 0xFF;
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val &= 0xF;
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if (get_bits1(gb))
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val = -val;
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} else {
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last = get_bits1(gb);
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skip = get_bits(gb, 6);
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val = get_sbits(gb, 8);
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}
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if (val) {
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int aval = FFABS(val), sign = val < 0;
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val = ac_quant * (2 * aval + 1);
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if (!(ac_quant & 1))
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val--;
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if (sign)
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val = -val;
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}
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idx += skip;
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if (idx >= 64)
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return AVERROR_INVALIDDATA;
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blk[ff_zigzag_direct[idx++]] = val;
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}
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return (idx <= 64 && last) ? 0 : -1;
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}
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#define DCT_TEMPLATE(blk, step, bias, shift, dshift, OP) \
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const int t0 = OP(2841 * blk[1 * step] + 565 * blk[7 * step]); \
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const int t1 = OP( 565 * blk[1 * step] - 2841 * blk[7 * step]); \
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const int t2 = OP(1609 * blk[5 * step] + 2408 * blk[3 * step]); \
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const int t3 = OP(2408 * blk[5 * step] - 1609 * blk[3 * step]); \
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const int t4 = OP(1108 * blk[2 * step] - 2676 * blk[6 * step]); \
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const int t5 = OP(2676 * blk[2 * step] + 1108 * blk[6 * step]); \
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const int t6 = ((blk[0 * step] + blk[4 * step]) * (1 << dshift)) + bias; \
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const int t7 = ((blk[0 * step] - blk[4 * step]) * (1 << dshift)) + bias; \
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const int t8 = t0 + t2; \
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const int t9 = t0 - t2; \
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const int tA = (int)(181U * (t9 + (t1 - t3)) + 0x80) >> 8; \
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const int tB = (int)(181U * (t9 - (t1 - t3)) + 0x80) >> 8; \
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const int tC = t1 + t3; \
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\
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blk[0 * step] = (t6 + t5 + t8) >> shift; \
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blk[1 * step] = (t7 + t4 + tA) >> shift; \
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blk[2 * step] = (t7 - t4 + tB) >> shift; \
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blk[3 * step] = (t6 - t5 + tC) >> shift; \
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blk[4 * step] = (t6 - t5 - tC) >> shift; \
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blk[5 * step] = (t7 - t4 - tB) >> shift; \
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blk[6 * step] = (t7 + t4 - tA) >> shift; \
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blk[7 * step] = (t6 + t5 - t8) >> shift; \
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#define ROP(x) x
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#define COP(x) (((x) + 4) >> 3)
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static void clv_dct(int16_t *block)
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{
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int i;
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int16_t *ptr;
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ptr = block;
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for (i = 0; i < 8; i++) {
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DCT_TEMPLATE(ptr, 1, 0x80, 8, 11, ROP);
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ptr += 8;
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}
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ptr = block;
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for (i = 0; i < 8; i++) {
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DCT_TEMPLATE(ptr, 8, 0x2000, 14, 8, COP);
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ptr++;
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}
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}
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static int decode_mb(CLVContext *c, int x, int y)
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{
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int i, has_ac[6], off;
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for (i = 0; i < 6; i++)
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has_ac[i] = get_bits1(&c->gb);
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off = x * 16 + y * 16 * c->pic->linesize[0];
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for (i = 0; i < 4; i++) {
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if (decode_block(c, c->block, has_ac[i], c->ac_quant) < 0)
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return AVERROR_INVALIDDATA;
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if (!x && !(i & 1)) {
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c->block[0] += c->top_dc[0];
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c->top_dc[0] = c->block[0];
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} else {
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c->block[0] += c->left_dc[(i & 2) >> 1];
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}
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c->left_dc[(i & 2) >> 1] = c->block[0];
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c->block[0] *= c->luma_dc_quant;
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clv_dct(c->block);
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if (i == 2)
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off += c->pic->linesize[0] * 8;
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c->idsp.put_pixels_clamped(c->block,
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c->pic->data[0] + off + (i & 1) * 8,
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c->pic->linesize[0]);
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}
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off = x * 8 + y * 8 * c->pic->linesize[1];
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for (i = 1; i < 3; i++) {
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if (decode_block(c, c->block, has_ac[i + 3], c->ac_quant) < 0)
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return AVERROR_INVALIDDATA;
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if (!x) {
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c->block[0] += c->top_dc[i];
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c->top_dc[i] = c->block[0];
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} else {
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c->block[0] += c->left_dc[i + 1];
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}
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c->left_dc[i + 1] = c->block[0];
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c->block[0] *= c->chroma_dc_quant;
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clv_dct(c->block);
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c->idsp.put_pixels_clamped(c->block, c->pic->data[i] + off,
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c->pic->linesize[i]);
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}
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return 0;
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}
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static int copy_block(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
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int plane, int x, int y, int dx, int dy, int size)
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{
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int shift = plane > 0;
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int sx = x + dx;
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int sy = y + dy;
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int sstride, dstride, soff, doff;
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uint8_t *sbuf, *dbuf;
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int i;
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if (x < 0 || sx < 0 || y < 0 || sy < 0 ||
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x + size > avctx->coded_width >> shift ||
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y + size > avctx->coded_height >> shift ||
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sx + size > avctx->coded_width >> shift ||
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sy + size > avctx->coded_height >> shift)
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return AVERROR_INVALIDDATA;
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sstride = src->linesize[plane];
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dstride = dst->linesize[plane];
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soff = sx + sy * sstride;
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sbuf = src->data[plane];
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doff = x + y * dstride;
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dbuf = dst->data[plane];
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for (i = 0; i < size; i++) {
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uint8_t *dptr = &dbuf[doff];
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uint8_t *sptr = &sbuf[soff];
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memcpy(dptr, sptr, size);
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doff += dstride;
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soff += sstride;
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}
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return 0;
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}
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static int copyadd_block(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
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int plane, int x, int y, int dx, int dy, int size, int bias)
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{
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int shift = plane > 0;
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int sx = x + dx;
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int sy = y + dy;
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int sstride = src->linesize[plane];
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int dstride = dst->linesize[plane];
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int soff = sx + sy * sstride;
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uint8_t *sbuf = src->data[plane];
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int doff = x + y * dstride;
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uint8_t *dbuf = dst->data[plane];
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int i, j;
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if (x < 0 || sx < 0 || y < 0 || sy < 0 ||
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x + size > avctx->coded_width >> shift ||
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y + size > avctx->coded_height >> shift ||
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sx + size > avctx->coded_width >> shift ||
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sy + size > avctx->coded_height >> shift)
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return AVERROR_INVALIDDATA;
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for (j = 0; j < size; j++) {
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uint8_t *dptr = &dbuf[doff];
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uint8_t *sptr = &sbuf[soff];
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for (i = 0; i < size; i++) {
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int val = sptr[i] + bias;
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dptr[i] = av_clip_uint8(val);
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}
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doff += dstride;
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soff += sstride;
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}
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return 0;
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}
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static MV mvi_predict(MVInfo *mvi, int mb_x, int mb_y, MV diff)
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{
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MV res, pred_mv;
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int left_mv, right_mv, top_mv, bot_mv;
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if (mvi->top) {
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if (mb_x > 0) {
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pred_mv = mvi->mv[mvi->mb_stride + mb_x - 1];
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} else {
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pred_mv = zero_mv;
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}
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} else if ((mb_x == 0) || (mb_x == mvi->mb_w - 1)) {
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pred_mv = mvi->mv[mb_x];
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} else {
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MV A = mvi->mv[mvi->mb_stride + mb_x - 1];
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MV B = mvi->mv[ mb_x ];
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MV C = mvi->mv[ mb_x + 1];
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pred_mv.x = mid_pred(A.x, B.x, C.x);
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pred_mv.y = mid_pred(A.y, B.y, C.y);
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}
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res = pred_mv;
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left_mv = -((mb_x * mvi->mb_size));
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right_mv = ((mvi->mb_w - mb_x - 1) * mvi->mb_size);
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if (res.x < left_mv) {
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res.x = left_mv;
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}
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if (res.x > right_mv) {
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res.x = right_mv;
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}
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top_mv = -((mb_y * mvi->mb_size));
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bot_mv = ((mvi->mb_h - mb_y - 1) * mvi->mb_size);
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if (res.y < top_mv) {
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res.y = top_mv;
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}
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if (res.y > bot_mv) {
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res.y = bot_mv;
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}
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mvi->mv[mvi->mb_stride + mb_x].x = res.x + diff.x;
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mvi->mv[mvi->mb_stride + mb_x].y = res.y + diff.y;
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return res;
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}
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static void mvi_reset(MVInfo *mvi, int mb_w, int mb_h, int mb_size)
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{
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mvi->top = 1;
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mvi->mb_w = mb_w;
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mvi->mb_h = mb_h;
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mvi->mb_size = mb_size;
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mvi->mb_stride = mb_w;
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memset(mvi->mv, 0, sizeof(MV) * mvi->mb_stride * 2);
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}
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static void mvi_update_row(MVInfo *mvi)
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{
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int i;
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mvi->top = 0;
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for (i = 0 ; i < mvi->mb_stride; i++) {
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mvi->mv[i] = mvi->mv[mvi->mb_stride + i];
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}
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}
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static TileInfo* decode_tile_info(GetBitContext *gb, LevelCodes *lc, int level)
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{
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TileInfo *ti;
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int i, flags = 0;
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int16_t bias = 0;
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MV mv = { 0 };
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if (lc[level].flags_cb.table) {
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flags = get_vlc2(gb, lc[level].flags_cb.table, lc[level].flags_cb.bits, 2);
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}
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if (lc[level].mv_cb.table) {
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uint16_t mv_code = get_vlc2(gb, lc[level].mv_cb.table, lc[level].mv_cb.bits, 3);
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if (mv_code != lc[level].mv_esc) {
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mv.x = (int8_t)(mv_code & 0xff);
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mv.y = (int8_t)(mv_code >> 8);
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} else {
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mv.x = get_sbits(gb, 8);
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mv.y = get_sbits(gb, 8);
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}
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}
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if (lc[level].bias_cb.table) {
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uint16_t bias_val = get_vlc2(gb, lc[level].bias_cb.table, lc[level].bias_cb.bits, 2);
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if (bias_val != lc[level].bias_esc) {
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bias = (int16_t)(bias_val);
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} else {
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bias = get_sbits(gb, 16);
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}
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}
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ti = av_calloc(1, sizeof(*ti));
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if (!ti)
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return NULL;
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ti->flags = flags;
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ti->mv = mv;
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ti->bias = bias;
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if (ti->flags) {
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for (i = 0; i < 4; i++) {
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if (ti->flags & (1 << i)) {
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TileInfo *subti = decode_tile_info(gb, lc, level + 1);
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ti->child[i] = subti;
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}
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}
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}
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return ti;
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}
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static int tile_do_block(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
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int plane, int x, int y, int dx, int dy, int size, int bias)
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{
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int ret;
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if (!bias) {
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ret = copy_block(avctx, dst, src, plane, x, y, dx, dy, size);
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} else {
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ret = copyadd_block(avctx, dst, src, plane, x, y, dx, dy, size, bias);
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}
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return ret;
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}
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static int restore_tree(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
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int plane, int x, int y, int size,
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TileInfo *tile, MV root_mv)
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{
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int ret;
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MV mv;
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mv.x = root_mv.x + tile->mv.x;
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mv.y = root_mv.y + tile->mv.y;
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if (!tile->flags) {
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ret = tile_do_block(avctx, dst, src, plane, x, y, mv.x, mv.y, size, tile->bias);
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} else {
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int i, hsize = size >> 1;
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for (i = 0; i < 4; i++) {
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int xoff = (i & 2) == 0 ? 0 : hsize;
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int yoff = (i & 1) == 0 ? 0 : hsize;
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if (tile->child[i]) {
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ret = restore_tree(avctx, dst, src, plane, x + xoff, y + yoff, hsize, tile->child[i], root_mv);
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av_freep(&tile->child[i]);
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} else {
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ret = tile_do_block(avctx, dst, src, plane, x + xoff, y + yoff, mv.x, mv.y, hsize, tile->bias);
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}
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}
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}
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return ret;
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}
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static void extend_edges(AVFrame *buf, int tile_size)
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{
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int comp, i, j;
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for (comp = 0; comp < 3; comp++) {
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int shift = comp > 0;
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int w = buf->width >> shift;
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int h = buf->height >> shift;
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int size = comp == 0 ? tile_size : tile_size >> 1;
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int stride = buf->linesize[comp];
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uint8_t *framebuf = buf->data[comp];
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int right = size - (w & (size - 1));
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int bottom = size - (h & (size - 1));
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if ((right == size) && (bottom == size)) {
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return;
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}
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if (right != size) {
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int off = w;
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for (j = 0; j < h; j++) {
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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)
|
|
{
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
CLVContext *c = avctx->priv_data;
|
|
GetByteContext gb;
|
|
uint32_t frame_type;
|
|
int i, j, ret;
|
|
int mb_ret = 0;
|
|
|
|
bytestream2_init(&gb, buf, buf_size);
|
|
if (avctx->codec_tag == MKTAG('C', 'L', 'V', '1')) {
|
|
int skip = bytestream2_get_byte(&gb);
|
|
bytestream2_skip(&gb, (skip + 1) * 8);
|
|
}
|
|
|
|
frame_type = bytestream2_get_byte(&gb);
|
|
|
|
if ((frame_type & 0x7f) == 0x30) {
|
|
*got_frame = 0;
|
|
return buf_size;
|
|
} 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;
|
|
}
|
|
|
|
if ((ret = ff_reget_buffer(avctx, c->pic, 0)) < 0)
|
|
return ret;
|
|
|
|
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);
|
|
c->luma_dc_quant = 32;
|
|
c->chroma_dc_quant = 32;
|
|
|
|
if ((ret = init_get_bits8(&c->gb, buf + bytestream2_tell(&gb),
|
|
buf_size - bytestream2_tell(&gb))) < 0)
|
|
return ret;
|
|
|
|
for (i = 0; i < 3; i++)
|
|
c->top_dc[i] = 32;
|
|
for (i = 0; i < 4; i++)
|
|
c->left_dc[i] = 32;
|
|
|
|
for (j = 0; j < c->mb_height; j++) {
|
|
for (i = 0; i < c->mb_width; i++) {
|
|
ret = decode_mb(c, i, j);
|
|
if (ret < 0)
|
|
mb_ret = ret;
|
|
}
|
|
}
|
|
extend_edges(c->pic, c->tile_size);
|
|
} else {
|
|
int plane;
|
|
|
|
if (c->pmb_width * c->pmb_height > 8LL*(buf_size - bytestream2_tell(&gb)))
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if ((ret = ff_reget_buffer(avctx, c->pic, 0)) < 0)
|
|
return ret;
|
|
|
|
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_bits_left(&c->gb) <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
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;
|
|
|
|
if (get_bits_left(&c->gb) < 0)
|
|
av_log(c->avctx, AV_LOG_WARNING, "overread %d\n", -get_bits_left(&c->gb));
|
|
|
|
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, 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 if (!avctx->extradata_size) {
|
|
c->tile_size = 16;
|
|
} 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 (1U << 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->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();
|
|
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);
|
|
ret = init_vlc(&c->dc_vlc, 9, NUM_DC_CODES,
|
|
clv_dc_bits, 1, 1,
|
|
clv_dc_codes, 1, 1, 0);
|
|
if (ret) {
|
|
av_log(avctx, AV_LOG_ERROR, "Error initialising DC VLC\n");
|
|
return ret;
|
|
}
|
|
ret = ff_init_vlc_sparse(&c->ac_vlc, 9, NUM_AC_CODES,
|
|
clv_ac_bits, 1, 1,
|
|
clv_ac_codes, 1, 1,
|
|
clv_ac_syms, 2, 2, 0);
|
|
if (ret) {
|
|
av_log(avctx, AV_LOG_ERROR, "Error initialising AC VLC\n");
|
|
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;
|
|
}
|
|
|
|
AVCodec ff_clearvideo_decoder = {
|
|
.name = "clearvideo",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Iterated Systems ClearVideo"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_CLEARVIDEO,
|
|
.priv_data_size = sizeof(CLVContext),
|
|
.init = clv_decode_init,
|
|
.close = clv_decode_end,
|
|
.decode = clv_decode_frame,
|
|
.capabilities = AV_CODEC_CAP_DR1,
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
|
|
};
|