638 lines
19 KiB
C
Executable File
638 lines
19 KiB
C
Executable File
/*
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* Dxtory decoder
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*
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* Copyright (c) 2011 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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#include <inttypes.h>
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#include "libavutil/common.h"
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#include "libavutil/intreadwrite.h"
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#define BITSTREAM_READER_LE
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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 "internal.h"
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#include "unary.h"
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static int dxtory_decode_v1_rgb(AVCodecContext *avctx, AVFrame *pic,
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const uint8_t *src, int src_size,
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int id, int bpp)
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{
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int h;
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uint8_t *dst;
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int ret;
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if (src_size < avctx->width * avctx->height * (int64_t)bpp) {
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av_log(avctx, AV_LOG_ERROR, "packet too small\n");
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return AVERROR_INVALIDDATA;
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}
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avctx->pix_fmt = id;
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if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
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return ret;
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dst = pic->data[0];
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for (h = 0; h < avctx->height; h++) {
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memcpy(dst, src, avctx->width * bpp);
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src += avctx->width * bpp;
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dst += pic->linesize[0];
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}
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return 0;
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}
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static int dxtory_decode_v1_410(AVCodecContext *avctx, AVFrame *pic,
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const uint8_t *src, int src_size)
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{
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int h, w;
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uint8_t *Y1, *Y2, *Y3, *Y4, *U, *V;
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int ret;
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if (src_size < FFALIGN(avctx->width, 4) * FFALIGN(avctx->height, 4) * 9LL / 8) {
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av_log(avctx, AV_LOG_ERROR, "packet too small\n");
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return AVERROR_INVALIDDATA;
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}
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avctx->pix_fmt = AV_PIX_FMT_YUV410P;
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if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
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return ret;
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Y1 = pic->data[0];
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Y2 = pic->data[0] + pic->linesize[0];
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Y3 = pic->data[0] + pic->linesize[0] * 2;
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Y4 = pic->data[0] + pic->linesize[0] * 3;
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U = pic->data[1];
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V = pic->data[2];
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for (h = 0; h < avctx->height; h += 4) {
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for (w = 0; w < avctx->width; w += 4) {
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AV_COPY32U(Y1 + w, src);
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AV_COPY32U(Y2 + w, src + 4);
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AV_COPY32U(Y3 + w, src + 8);
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AV_COPY32U(Y4 + w, src + 12);
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U[w >> 2] = src[16] + 0x80;
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V[w >> 2] = src[17] + 0x80;
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src += 18;
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}
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Y1 += pic->linesize[0] << 2;
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Y2 += pic->linesize[0] << 2;
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Y3 += pic->linesize[0] << 2;
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Y4 += pic->linesize[0] << 2;
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U += pic->linesize[1];
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V += pic->linesize[2];
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}
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return 0;
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}
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static int dxtory_decode_v1_420(AVCodecContext *avctx, AVFrame *pic,
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const uint8_t *src, int src_size)
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{
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int h, w;
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uint8_t *Y1, *Y2, *U, *V;
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int ret;
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if (src_size < FFALIGN(avctx->width, 2) * FFALIGN(avctx->height, 2) * 3LL / 2) {
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av_log(avctx, AV_LOG_ERROR, "packet too small\n");
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return AVERROR_INVALIDDATA;
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}
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avctx->pix_fmt = AV_PIX_FMT_YUV420P;
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if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
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return ret;
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Y1 = pic->data[0];
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Y2 = pic->data[0] + pic->linesize[0];
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U = pic->data[1];
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V = pic->data[2];
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for (h = 0; h < avctx->height; h += 2) {
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for (w = 0; w < avctx->width; w += 2) {
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AV_COPY16(Y1 + w, src);
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AV_COPY16(Y2 + w, src + 2);
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U[w >> 1] = src[4] + 0x80;
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V[w >> 1] = src[5] + 0x80;
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src += 6;
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}
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Y1 += pic->linesize[0] << 1;
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Y2 += pic->linesize[0] << 1;
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U += pic->linesize[1];
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V += pic->linesize[2];
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}
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return 0;
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}
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static int dxtory_decode_v1_444(AVCodecContext *avctx, AVFrame *pic,
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const uint8_t *src, int src_size)
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{
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int h, w;
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uint8_t *Y, *U, *V;
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int ret;
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if (src_size < avctx->width * avctx->height * 3LL) {
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av_log(avctx, AV_LOG_ERROR, "packet too small\n");
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return AVERROR_INVALIDDATA;
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}
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avctx->pix_fmt = AV_PIX_FMT_YUV444P;
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if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
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return ret;
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Y = pic->data[0];
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U = pic->data[1];
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V = pic->data[2];
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for (h = 0; h < avctx->height; h++) {
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for (w = 0; w < avctx->width; w++) {
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Y[w] = *src++;
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U[w] = *src++ ^ 0x80;
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V[w] = *src++ ^ 0x80;
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}
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Y += pic->linesize[0];
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U += pic->linesize[1];
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V += pic->linesize[2];
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}
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return 0;
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}
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static const uint8_t def_lru[8] = { 0x00, 0x20, 0x40, 0x60, 0x80, 0xA0, 0xC0, 0xFF };
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static const uint8_t def_lru_555[8] = { 0x00, 0x08, 0x10, 0x18, 0x1F };
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static const uint8_t def_lru_565[8] = { 0x00, 0x08, 0x10, 0x20, 0x30, 0x3F };
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static inline uint8_t decode_sym(GetBitContext *gb, uint8_t lru[8])
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{
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uint8_t c, val;
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c = get_unary(gb, 0, 8);
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if (!c) {
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val = get_bits(gb, 8);
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memmove(lru + 1, lru, sizeof(*lru) * (8 - 1));
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} else {
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val = lru[c - 1];
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memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
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}
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lru[0] = val;
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return val;
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}
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static int check_slice_size(AVCodecContext *avctx,
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const uint8_t *src, int src_size,
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int slice_size, int off)
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{
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int cur_slice_size;
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if (slice_size > src_size - off) {
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av_log(avctx, AV_LOG_ERROR,
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"invalid slice size %d (only %d bytes left)\n",
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slice_size, src_size - off);
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return AVERROR_INVALIDDATA;
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}
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if (slice_size <= 16) {
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av_log(avctx, AV_LOG_ERROR, "invalid slice size %d\n",
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slice_size);
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return AVERROR_INVALIDDATA;
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}
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cur_slice_size = AV_RL32(src + off);
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if (cur_slice_size != slice_size - 16) {
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av_log(avctx, AV_LOG_ERROR,
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"Slice sizes mismatch: got %d instead of %d\n",
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cur_slice_size, slice_size - 16);
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}
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return 0;
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}
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static int load_buffer(AVCodecContext *avctx,
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const uint8_t *src, int src_size,
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GetByteContext *gb,
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int *nslices, int *off)
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{
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bytestream2_init(gb, src, src_size);
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*nslices = bytestream2_get_le16(gb);
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*off = FFALIGN(*nslices * 4 + 2, 16);
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if (src_size < *off) {
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av_log(avctx, AV_LOG_ERROR, "no slice data\n");
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return AVERROR_INVALIDDATA;
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}
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if (!*nslices) {
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avpriv_request_sample(avctx, "%d slices for %dx%d", *nslices,
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avctx->width, avctx->height);
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return AVERROR_PATCHWELCOME;
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}
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return 0;
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}
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static inline uint8_t decode_sym_565(GetBitContext *gb, uint8_t lru[8],
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int bits)
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{
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uint8_t c, val;
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c = get_unary(gb, 0, bits);
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if (!c) {
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val = get_bits(gb, bits);
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memmove(lru + 1, lru, sizeof(*lru) * (6 - 1));
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} else {
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val = lru[c - 1];
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memmove(lru + 1, lru, sizeof(*lru) * (c - 1));
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}
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lru[0] = val;
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return val;
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}
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typedef int (*decode_slice_func)(GetBitContext *gb, AVFrame *frame,
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int line, int height, uint8_t lru[3][8]);
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typedef void (*setup_lru_func)(uint8_t lru[3][8]);
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static int dxtory_decode_v2(AVCodecContext *avctx, AVFrame *pic,
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const uint8_t *src, int src_size,
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decode_slice_func decode_slice,
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setup_lru_func setup_lru,
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enum AVPixelFormat fmt)
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{
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GetByteContext gb, gb_check;
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GetBitContext gb2;
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int nslices, slice, line = 0;
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uint32_t off, slice_size;
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uint64_t off_check;
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uint8_t lru[3][8];
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int ret;
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ret = load_buffer(avctx, src, src_size, &gb, &nslices, &off);
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if (ret < 0)
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return ret;
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off_check = off;
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gb_check = gb;
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for (slice = 0; slice < nslices; slice++) {
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slice_size = bytestream2_get_le32(&gb_check);
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if (slice_size <= 16 + (avctx->height * avctx->width / (8 * nslices)))
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return AVERROR_INVALIDDATA;
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off_check += slice_size;
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}
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if (off_check - avctx->discard_damaged_percentage*off_check/100 > src_size)
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return AVERROR_INVALIDDATA;
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avctx->pix_fmt = fmt;
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if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
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return ret;
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for (slice = 0; slice < nslices; slice++) {
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slice_size = bytestream2_get_le32(&gb);
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setup_lru(lru);
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ret = check_slice_size(avctx, src, src_size, slice_size, off);
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if (ret < 0)
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return ret;
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if ((ret = init_get_bits8(&gb2, src + off + 16, slice_size - 16)) < 0)
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return ret;
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line += decode_slice(&gb2, pic, line, avctx->height - line, lru);
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off += slice_size;
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}
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if (avctx->height - line) {
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avpriv_request_sample(avctx, "Not enough slice data available");
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}
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return 0;
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}
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av_always_inline
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static int dx2_decode_slice_5x5(GetBitContext *gb, AVFrame *frame,
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int line, int left, uint8_t lru[3][8],
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int is_565)
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{
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int x, y;
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int r, g, b;
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int width = frame->width;
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int stride = frame->linesize[0];
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uint8_t *dst = frame->data[0] + stride * line;
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for (y = 0; y < left && get_bits_left(gb) > 6 * width; y++) {
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for (x = 0; x < width; x++) {
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b = decode_sym_565(gb, lru[0], 5);
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g = decode_sym_565(gb, lru[1], is_565 ? 6 : 5);
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r = decode_sym_565(gb, lru[2], 5);
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dst[x * 3 + 0] = (r << 3) | (r >> 2);
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dst[x * 3 + 1] = is_565 ? (g << 2) | (g >> 4) : (g << 3) | (g >> 2);
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dst[x * 3 + 2] = (b << 3) | (b >> 2);
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}
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dst += stride;
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}
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return y;
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}
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static void setup_lru_555(uint8_t lru[3][8])
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{
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memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));
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memcpy(lru[1], def_lru_555, 8 * sizeof(*def_lru));
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memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));
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}
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static void setup_lru_565(uint8_t lru[3][8])
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{
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memcpy(lru[0], def_lru_555, 8 * sizeof(*def_lru));
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memcpy(lru[1], def_lru_565, 8 * sizeof(*def_lru));
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memcpy(lru[2], def_lru_555, 8 * sizeof(*def_lru));
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}
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static int dx2_decode_slice_555(GetBitContext *gb, AVFrame *frame,
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int line, int left, uint8_t lru[3][8])
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{
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return dx2_decode_slice_5x5(gb, frame, line, left, lru, 0);
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}
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static int dx2_decode_slice_565(GetBitContext *gb, AVFrame *frame,
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int line, int left, uint8_t lru[3][8])
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{
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return dx2_decode_slice_5x5(gb, frame, line, left, lru, 1);
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}
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static int dxtory_decode_v2_565(AVCodecContext *avctx, AVFrame *pic,
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const uint8_t *src, int src_size, int is_565)
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{
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enum AVPixelFormat fmt = AV_PIX_FMT_RGB24;
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if (is_565)
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return dxtory_decode_v2(avctx, pic, src, src_size,
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dx2_decode_slice_565,
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setup_lru_565,
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fmt);
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else
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return dxtory_decode_v2(avctx, pic, src, src_size,
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dx2_decode_slice_555,
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setup_lru_555,
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fmt);
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}
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static int dx2_decode_slice_rgb(GetBitContext *gb, AVFrame *frame,
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int line, int left, uint8_t lru[3][8])
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{
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int x, y;
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int width = frame->width;
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int stride = frame->linesize[0];
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uint8_t *dst = frame->data[0] + stride * line;
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for (y = 0; y < left && get_bits_left(gb) > 6 * width; y++) {
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for (x = 0; x < width; x++) {
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dst[x * 3 + 0] = decode_sym(gb, lru[0]);
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dst[x * 3 + 1] = decode_sym(gb, lru[1]);
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dst[x * 3 + 2] = decode_sym(gb, lru[2]);
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}
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dst += stride;
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}
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return y;
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}
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static void default_setup_lru(uint8_t lru[3][8])
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{
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int i;
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for (i = 0; i < 3; i++)
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memcpy(lru[i], def_lru, 8 * sizeof(*def_lru));
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}
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static int dxtory_decode_v2_rgb(AVCodecContext *avctx, AVFrame *pic,
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const uint8_t *src, int src_size)
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{
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return dxtory_decode_v2(avctx, pic, src, src_size,
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dx2_decode_slice_rgb,
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default_setup_lru,
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AV_PIX_FMT_BGR24);
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}
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static int dx2_decode_slice_410(GetBitContext *gb, AVFrame *frame,
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int line, int left,
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uint8_t lru[3][8])
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{
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int x, y, i, j;
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int width = frame->width;
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int ystride = frame->linesize[0];
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int ustride = frame->linesize[1];
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int vstride = frame->linesize[2];
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uint8_t *Y = frame->data[0] + ystride * line;
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uint8_t *U = frame->data[1] + (ustride >> 2) * line;
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uint8_t *V = frame->data[2] + (vstride >> 2) * line;
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for (y = 0; y < left - 3 && get_bits_left(gb) > 9 * width; y += 4) {
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for (x = 0; x < width; x += 4) {
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for (j = 0; j < 4; j++)
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for (i = 0; i < 4; i++)
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Y[x + i + j * ystride] = decode_sym(gb, lru[0]);
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U[x >> 2] = decode_sym(gb, lru[1]) ^ 0x80;
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V[x >> 2] = decode_sym(gb, lru[2]) ^ 0x80;
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}
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Y += ystride << 2;
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U += ustride;
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V += vstride;
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}
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return y;
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}
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static int dxtory_decode_v2_410(AVCodecContext *avctx, AVFrame *pic,
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const uint8_t *src, int src_size)
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{
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return dxtory_decode_v2(avctx, pic, src, src_size,
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dx2_decode_slice_410,
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default_setup_lru,
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AV_PIX_FMT_YUV410P);
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}
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static int dx2_decode_slice_420(GetBitContext *gb, AVFrame *frame,
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int line, int left,
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uint8_t lru[3][8])
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{
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int x, y;
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|
|
int width = frame->width;
|
|
|
|
int ystride = frame->linesize[0];
|
|
int ustride = frame->linesize[1];
|
|
int vstride = frame->linesize[2];
|
|
|
|
uint8_t *Y = frame->data[0] + ystride * line;
|
|
uint8_t *U = frame->data[1] + (ustride >> 1) * line;
|
|
uint8_t *V = frame->data[2] + (vstride >> 1) * line;
|
|
|
|
|
|
for (y = 0; y < left - 1 && get_bits_left(gb) > 6 * width; y += 2) {
|
|
for (x = 0; x < width; x += 2) {
|
|
Y[x + 0 + 0 * ystride] = decode_sym(gb, lru[0]);
|
|
Y[x + 1 + 0 * ystride] = decode_sym(gb, lru[0]);
|
|
Y[x + 0 + 1 * ystride] = decode_sym(gb, lru[0]);
|
|
Y[x + 1 + 1 * ystride] = decode_sym(gb, lru[0]);
|
|
U[x >> 1] = decode_sym(gb, lru[1]) ^ 0x80;
|
|
V[x >> 1] = decode_sym(gb, lru[2]) ^ 0x80;
|
|
}
|
|
|
|
Y += ystride << 1;
|
|
U += ustride;
|
|
V += vstride;
|
|
}
|
|
|
|
return y;
|
|
}
|
|
|
|
static int dxtory_decode_v2_420(AVCodecContext *avctx, AVFrame *pic,
|
|
const uint8_t *src, int src_size)
|
|
{
|
|
return dxtory_decode_v2(avctx, pic, src, src_size,
|
|
dx2_decode_slice_420,
|
|
default_setup_lru,
|
|
AV_PIX_FMT_YUV420P);
|
|
}
|
|
|
|
static int dx2_decode_slice_444(GetBitContext *gb, AVFrame *frame,
|
|
int line, int left,
|
|
uint8_t lru[3][8])
|
|
{
|
|
int x, y;
|
|
|
|
int width = frame->width;
|
|
|
|
int ystride = frame->linesize[0];
|
|
int ustride = frame->linesize[1];
|
|
int vstride = frame->linesize[2];
|
|
|
|
uint8_t *Y = frame->data[0] + ystride * line;
|
|
uint8_t *U = frame->data[1] + ustride * line;
|
|
uint8_t *V = frame->data[2] + vstride * line;
|
|
|
|
for (y = 0; y < left && get_bits_left(gb) > 6 * width; y++) {
|
|
for (x = 0; x < width; x++) {
|
|
Y[x] = decode_sym(gb, lru[0]);
|
|
U[x] = decode_sym(gb, lru[1]) ^ 0x80;
|
|
V[x] = decode_sym(gb, lru[2]) ^ 0x80;
|
|
}
|
|
|
|
Y += ystride;
|
|
U += ustride;
|
|
V += vstride;
|
|
}
|
|
|
|
return y;
|
|
}
|
|
|
|
static int dxtory_decode_v2_444(AVCodecContext *avctx, AVFrame *pic,
|
|
const uint8_t *src, int src_size)
|
|
{
|
|
return dxtory_decode_v2(avctx, pic, src, src_size,
|
|
dx2_decode_slice_444,
|
|
default_setup_lru,
|
|
AV_PIX_FMT_YUV444P);
|
|
}
|
|
|
|
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
|
|
AVPacket *avpkt)
|
|
{
|
|
AVFrame *pic = data;
|
|
const uint8_t *src = avpkt->data;
|
|
int ret;
|
|
|
|
if (avpkt->size < 16) {
|
|
av_log(avctx, AV_LOG_ERROR, "packet too small\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
switch (AV_RB32(src)) {
|
|
case 0x01000001:
|
|
ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
|
|
AV_PIX_FMT_BGR24, 3);
|
|
break;
|
|
case 0x01000009:
|
|
ret = dxtory_decode_v2_rgb(avctx, pic, src + 16, avpkt->size - 16);
|
|
break;
|
|
case 0x02000001:
|
|
ret = dxtory_decode_v1_420(avctx, pic, src + 16, avpkt->size - 16);
|
|
break;
|
|
case 0x02000009:
|
|
ret = dxtory_decode_v2_420(avctx, pic, src + 16, avpkt->size - 16);
|
|
break;
|
|
case 0x03000001:
|
|
ret = dxtory_decode_v1_410(avctx, pic, src + 16, avpkt->size - 16);
|
|
break;
|
|
case 0x03000009:
|
|
ret = dxtory_decode_v2_410(avctx, pic, src + 16, avpkt->size - 16);
|
|
break;
|
|
case 0x04000001:
|
|
ret = dxtory_decode_v1_444(avctx, pic, src + 16, avpkt->size - 16);
|
|
break;
|
|
case 0x04000009:
|
|
ret = dxtory_decode_v2_444(avctx, pic, src + 16, avpkt->size - 16);
|
|
break;
|
|
case 0x17000001:
|
|
ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
|
|
AV_PIX_FMT_RGB565LE, 2);
|
|
break;
|
|
case 0x17000009:
|
|
ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 1);
|
|
break;
|
|
case 0x18000001:
|
|
case 0x19000001:
|
|
ret = dxtory_decode_v1_rgb(avctx, pic, src + 16, avpkt->size - 16,
|
|
AV_PIX_FMT_RGB555LE, 2);
|
|
break;
|
|
case 0x18000009:
|
|
case 0x19000009:
|
|
ret = dxtory_decode_v2_565(avctx, pic, src + 16, avpkt->size - 16, 0);
|
|
break;
|
|
default:
|
|
avpriv_request_sample(avctx, "Frame header %"PRIX32, AV_RB32(src));
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
pic->pict_type = AV_PICTURE_TYPE_I;
|
|
pic->key_frame = 1;
|
|
*got_frame = 1;
|
|
|
|
return avpkt->size;
|
|
}
|
|
|
|
AVCodec ff_dxtory_decoder = {
|
|
.name = "dxtory",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Dxtory"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_DXTORY,
|
|
.decode = decode_frame,
|
|
.capabilities = AV_CODEC_CAP_DR1,
|
|
};
|