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626 lines
18 KiB
626 lines
18 KiB
/* |
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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 Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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 * 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 < avctx->width * avctx->height * 18 / 16) { |
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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_COPY32(Y1 + w, src); |
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AV_COPY32(Y2 + w, src + 4); |
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AV_COPY32(Y3 + w, src + 8); |
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AV_COPY32(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 < avctx->width * avctx->height * 3 / 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 * 3) { |
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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 %"PRIu32" (only %"PRIu32" 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 %"PRIu32"\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 %"PRIu32" instead of %"PRIu32"\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; |
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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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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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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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init_get_bits(&gb2, src + off + 16, (slice_size - 16) * 8); |
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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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av_log(avctx, AV_LOG_VERBOSE, |
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"Not enough slice data available, " |
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"cropping the frame by %d pixels\n", |
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avctx->height - line); |
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avctx->height = line; |
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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) > 16; 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) > 16; 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) > 16; 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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|
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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 >> 1) * line; |
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uint8_t *V = frame->data[2] + (vstride >> 1) * line; |
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for (y = 0; y < left - 1 && get_bits_left(gb) > 16; y += 2) { |
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for (x = 0; x < width; x += 2) { |
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Y[x + 0 + 0 * ystride] = decode_sym(gb, lru[0]); |
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Y[x + 1 + 0 * ystride] = decode_sym(gb, lru[0]); |
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Y[x + 0 + 1 * ystride] = decode_sym(gb, lru[0]); |
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Y[x + 1 + 1 * ystride] = decode_sym(gb, lru[0]); |
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U[x >> 1] = decode_sym(gb, lru[1]) ^ 0x80; |
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V[x >> 1] = decode_sym(gb, lru[2]) ^ 0x80; |
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} |
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Y += ystride << 1; |
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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_420(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_420, |
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default_setup_lru, |
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AV_PIX_FMT_YUV420P); |
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} |
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|
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static int dx2_decode_slice_444(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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|
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int width = frame->width; |
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|
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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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|
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uint8_t *Y = frame->data[0] + ystride * line; |
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uint8_t *U = frame->data[1] + ustride * line; |
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uint8_t *V = frame->data[2] + vstride * line; |
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|
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for (y = 0; y < left && get_bits_left(gb) > 16; y++) { |
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for (x = 0; x < width; x++) { |
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Y[x] = decode_sym(gb, lru[0]); |
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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, |
|
};
|
|
|