2006-10-11 16:57:00 +00:00
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/*
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2014-07-06 13:45:52 +00:00
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* Delphine Software International CIN video decoder
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2006-10-11 16:57:00 +00:00
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* Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net)
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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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2010-04-20 14:45:34 +00:00
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* @file
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2014-07-06 13:45:52 +00:00
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* Delphine Software International CIN video decoder
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2006-10-11 16:57:00 +00:00
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*/
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#include "avcodec.h"
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2007-06-02 01:41:07 +00:00
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#include "bytestream.h"
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2012-11-10 12:22:56 +00:00
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#include "internal.h"
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2006-10-11 16:57:00 +00:00
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typedef enum CinVideoBitmapIndex {
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CIN_CUR_BMP = 0, /* current */
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CIN_PRE_BMP = 1, /* previous */
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CIN_INT_BMP = 2 /* intermediate */
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} CinVideoBitmapIndex;
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typedef struct CinVideoContext {
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AVCodecContext *avctx;
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2013-11-09 09:14:46 +00:00
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AVFrame *frame;
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2006-10-11 16:57:00 +00:00
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unsigned int bitmap_size;
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uint32_t palette[256];
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uint8_t *bitmap_table[3];
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} CinVideoContext;
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2012-10-25 13:46:19 +00:00
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static av_cold void destroy_buffers(CinVideoContext *cin)
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{
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int i;
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for (i = 0; i < 3; ++i)
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av_freep(&cin->bitmap_table[i]);
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}
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static av_cold int allocate_buffers(CinVideoContext *cin)
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{
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int i;
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for (i = 0; i < 3; ++i) {
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cin->bitmap_table[i] = av_mallocz(cin->bitmap_size);
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if (!cin->bitmap_table[i]) {
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av_log(cin->avctx, AV_LOG_ERROR, "Can't allocate bitmap buffers.\n");
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destroy_buffers(cin);
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return AVERROR(ENOMEM);
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}
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}
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return 0;
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}
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2006-10-11 16:57:00 +00:00
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2008-03-21 03:11:20 +00:00
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static av_cold int cinvideo_decode_init(AVCodecContext *avctx)
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2006-10-11 16:57:00 +00:00
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{
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2007-04-08 20:24:16 +00:00
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CinVideoContext *cin = avctx->priv_data;
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2006-10-11 16:57:00 +00:00
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cin->avctx = avctx;
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2012-10-06 10:10:34 +00:00
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avctx->pix_fmt = AV_PIX_FMT_PAL8;
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2006-10-11 16:57:00 +00:00
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2013-11-09 09:14:46 +00:00
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cin->frame = av_frame_alloc();
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if (!cin->frame)
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return AVERROR(ENOMEM);
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2006-10-11 16:57:00 +00:00
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cin->bitmap_size = avctx->width * avctx->height;
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2012-10-25 13:46:19 +00:00
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if (allocate_buffers(cin))
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return AVERROR(ENOMEM);
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2006-10-11 16:57:00 +00:00
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return 0;
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}
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2013-07-19 19:05:44 +00:00
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static void cin_apply_delta_data(const unsigned char *src, unsigned char *dst,
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int size)
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2006-10-11 16:57:00 +00:00
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{
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while (size--)
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*dst++ += *src++;
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}
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2013-07-19 19:05:44 +00:00
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static int cin_decode_huffman(const unsigned char *src, int src_size,
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unsigned char *dst, int dst_size)
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2006-10-11 16:57:00 +00:00
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{
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int b, huff_code = 0;
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unsigned char huff_code_table[15];
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2013-07-19 19:05:44 +00:00
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unsigned char *dst_cur = dst;
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unsigned char *dst_end = dst + dst_size;
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2006-10-11 16:57:00 +00:00
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const unsigned char *src_end = src + src_size;
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2013-07-19 19:05:44 +00:00
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memcpy(huff_code_table, src, 15);
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src += 15;
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2006-10-11 16:57:00 +00:00
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while (src < src_end) {
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huff_code = *src++;
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if ((huff_code >> 4) == 15) {
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2013-07-19 19:05:44 +00:00
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b = huff_code << 4;
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huff_code = *src++;
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2006-10-11 16:57:00 +00:00
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*dst_cur++ = b | (huff_code >> 4);
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} else
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*dst_cur++ = huff_code_table[huff_code >> 4];
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if (dst_cur >= dst_end)
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break;
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huff_code &= 15;
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if (huff_code == 15) {
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*dst_cur++ = *src++;
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} else
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*dst_cur++ = huff_code_table[huff_code];
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if (dst_cur >= dst_end)
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break;
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}
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return dst_cur - dst;
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}
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2013-07-19 19:05:44 +00:00
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static int cin_decode_lzss(const unsigned char *src, int src_size,
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unsigned char *dst, int dst_size)
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2006-10-11 16:57:00 +00:00
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{
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uint16_t cmd;
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int i, sz, offset, code;
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2013-07-19 19:05:44 +00:00
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unsigned char *dst_end = dst + dst_size, *dst_start = dst;
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2006-10-11 16:57:00 +00:00
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const unsigned char *src_end = src + src_size;
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while (src < src_end && dst < dst_end) {
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code = *src++;
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for (i = 0; i < 8 && src < src_end && dst < dst_end; ++i) {
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if (code & (1 << i)) {
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*dst++ = *src++;
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} else {
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2013-07-19 19:05:44 +00:00
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cmd = AV_RL16(src);
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src += 2;
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2006-10-11 16:57:00 +00:00
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offset = cmd >> 4;
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2013-07-19 19:05:44 +00:00
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if ((int)(dst - dst_start) < offset + 1)
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2012-02-29 23:07:09 +00:00
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return AVERROR_INVALIDDATA;
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2006-10-11 16:57:00 +00:00
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sz = (cmd & 0xF) + 2;
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2013-07-19 19:05:44 +00:00
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/* don't use memcpy/memmove here as the decoding routine
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* (ab)uses buffer overlappings to repeat bytes in the
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* destination */
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2006-10-11 16:57:00 +00:00
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sz = FFMIN(sz, dst_end - dst);
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while (sz--) {
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*dst = *(dst - offset - 1);
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++dst;
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}
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}
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}
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}
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2012-03-11 14:28:54 +00:00
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2018-04-16 20:29:09 +00:00
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if (dst_end - dst > dst_size - dst_size/10)
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return AVERROR_INVALIDDATA;
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2012-03-04 17:04:55 +00:00
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return 0;
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2006-10-11 16:57:00 +00:00
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}
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2013-07-21 09:45:48 +00:00
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static int cin_decode_rle(const unsigned char *src, int src_size,
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2013-07-19 19:05:44 +00:00
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unsigned char *dst, int dst_size)
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2006-10-11 16:57:00 +00:00
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{
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int len, code;
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2013-07-19 19:05:44 +00:00
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unsigned char *dst_end = dst + dst_size;
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2006-10-11 16:57:00 +00:00
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const unsigned char *src_end = src + src_size;
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2012-04-16 14:44:12 +00:00
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while (src + 1 < src_end && dst < dst_end) {
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2006-10-11 16:57:00 +00:00
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code = *src++;
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if (code & 0x80) {
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len = code - 0x7F;
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memset(dst, *src++, FFMIN(len, dst_end - dst));
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} else {
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len = code + 1;
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2012-04-16 14:44:12 +00:00
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if (len > src_end-src) {
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2012-11-23 17:10:02 +00:00
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av_log(NULL, AV_LOG_ERROR, "RLE overread\n");
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2012-04-16 14:44:12 +00:00
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return AVERROR_INVALIDDATA;
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}
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2013-07-19 19:09:40 +00:00
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memcpy(dst, src, FFMIN3(len, dst_end - dst, src_end - src));
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2006-10-11 16:57:00 +00:00
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src += len;
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}
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dst += len;
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}
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2018-04-16 20:29:09 +00:00
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if (dst_end - dst > dst_size - dst_size/10)
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return AVERROR_INVALIDDATA;
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2012-04-16 14:44:12 +00:00
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return 0;
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2006-10-11 16:57:00 +00:00
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}
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static int cinvideo_decode_frame(AVCodecContext *avctx,
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2012-11-13 18:35:22 +00:00
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void *data, int *got_frame,
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2009-04-07 15:59:50 +00:00
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AVPacket *avpkt)
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2006-10-11 16:57:00 +00:00
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{
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2013-07-19 19:05:44 +00:00
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const uint8_t *buf = avpkt->data;
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int buf_size = avpkt->size;
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2007-04-08 20:24:16 +00:00
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CinVideoContext *cin = avctx->priv_data;
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2013-07-19 19:05:44 +00:00
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int i, y, palette_type, palette_colors_count,
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bitmap_frame_type, bitmap_frame_size, res = 0;
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2006-10-11 16:57:00 +00:00
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2013-07-19 19:05:44 +00:00
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palette_type = buf[0];
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palette_colors_count = AV_RL16(buf + 1);
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bitmap_frame_type = buf[3];
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buf += 4;
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2006-10-11 16:57:00 +00:00
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bitmap_frame_size = buf_size - 4;
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/* handle palette */
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2011-09-29 22:05:50 +00:00
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if (bitmap_frame_size < palette_colors_count * (3 + (palette_type != 0)))
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return AVERROR_INVALIDDATA;
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2006-10-11 16:57:00 +00:00
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if (palette_type == 0) {
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2011-09-29 22:05:51 +00:00
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if (palette_colors_count > 256)
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return AVERROR_INVALIDDATA;
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2006-10-11 16:57:00 +00:00
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for (i = 0; i < palette_colors_count; ++i) {
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2013-07-21 09:45:48 +00:00
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cin->palette[i] = 0xFFU << 24 | bytestream_get_le24(&buf);
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2006-10-11 16:57:00 +00:00
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bitmap_frame_size -= 3;
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}
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} else {
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for (i = 0; i < palette_colors_count; ++i) {
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2013-07-21 09:45:48 +00:00
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cin->palette[buf[0]] = 0xFFU << 24 | AV_RL24(buf + 1);
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2013-07-19 19:05:44 +00:00
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buf += 4;
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bitmap_frame_size -= 4;
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2006-10-11 16:57:00 +00:00
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}
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}
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2013-07-19 19:05:44 +00:00
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/* note: the decoding routines below assumes that
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* surface.width = surface.pitch */
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2006-10-11 16:57:00 +00:00
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switch (bitmap_frame_type) {
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case 9:
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2018-04-16 20:28:23 +00:00
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res = cin_decode_rle(buf, bitmap_frame_size,
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2013-07-19 19:05:44 +00:00
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cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
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2018-04-16 20:28:23 +00:00
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if (res < 0)
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return res;
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2006-10-11 16:57:00 +00:00
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break;
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case 34:
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2018-04-16 20:28:23 +00:00
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res = cin_decode_rle(buf, bitmap_frame_size,
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2013-07-19 19:05:44 +00:00
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cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
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2018-04-16 20:28:23 +00:00
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if (res < 0)
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return res;
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2006-10-11 16:57:00 +00:00
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cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
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2013-07-19 19:05:44 +00:00
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cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
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2006-10-11 16:57:00 +00:00
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break;
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case 35:
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2012-11-11 18:46:16 +00:00
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bitmap_frame_size = cin_decode_huffman(buf, bitmap_frame_size,
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2013-07-19 19:05:44 +00:00
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cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
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2018-04-16 20:28:23 +00:00
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res = cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
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2013-07-19 19:05:44 +00:00
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cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
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2018-04-16 20:28:23 +00:00
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if (res < 0)
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return res;
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2006-10-11 16:57:00 +00:00
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break;
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case 36:
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bitmap_frame_size = cin_decode_huffman(buf, bitmap_frame_size,
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2013-07-19 19:05:44 +00:00
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cin->bitmap_table[CIN_INT_BMP],
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cin->bitmap_size);
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2018-04-16 20:28:23 +00:00
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res = cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
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2013-07-19 19:05:44 +00:00
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cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
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2018-04-16 20:28:23 +00:00
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if (res < 0)
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return res;
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2006-10-11 16:57:00 +00:00
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cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
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2013-07-19 19:05:44 +00:00
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cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
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2006-10-11 16:57:00 +00:00
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break;
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case 37:
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cin_decode_huffman(buf, bitmap_frame_size,
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2013-07-19 19:05:44 +00:00
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cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
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2006-10-11 16:57:00 +00:00
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break;
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case 38:
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2012-02-29 23:07:09 +00:00
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res = cin_decode_lzss(buf, bitmap_frame_size,
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cin->bitmap_table[CIN_CUR_BMP],
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cin->bitmap_size);
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if (res < 0)
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return res;
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2006-10-11 16:57:00 +00:00
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break;
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case 39:
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2012-02-29 23:07:09 +00:00
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res = cin_decode_lzss(buf, bitmap_frame_size,
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cin->bitmap_table[CIN_CUR_BMP],
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cin->bitmap_size);
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if (res < 0)
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return res;
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2006-10-11 16:57:00 +00:00
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cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
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2013-07-19 19:05:44 +00:00
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cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
|
2006-10-11 16:57:00 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2013-11-17 00:07:37 +00:00
|
|
|
if ((res = ff_reget_buffer(avctx, cin->frame)) < 0)
|
2012-10-25 12:59:34 +00:00
|
|
|
return res;
|
2012-02-29 23:07:09 +00:00
|
|
|
|
2013-11-09 09:14:46 +00:00
|
|
|
memcpy(cin->frame->data[1], cin->palette, sizeof(cin->palette));
|
|
|
|
cin->frame->palette_has_changed = 1;
|
2006-10-11 16:57:00 +00:00
|
|
|
for (y = 0; y < cin->avctx->height; ++y)
|
2013-11-09 09:14:46 +00:00
|
|
|
memcpy(cin->frame->data[0] + (cin->avctx->height - 1 - y) * cin->frame->linesize[0],
|
2013-07-19 19:05:44 +00:00
|
|
|
cin->bitmap_table[CIN_CUR_BMP] + y * cin->avctx->width,
|
|
|
|
cin->avctx->width);
|
2006-10-11 16:57:00 +00:00
|
|
|
|
2013-07-19 19:05:44 +00:00
|
|
|
FFSWAP(uint8_t *, cin->bitmap_table[CIN_CUR_BMP],
|
|
|
|
cin->bitmap_table[CIN_PRE_BMP]);
|
2006-10-11 16:57:00 +00:00
|
|
|
|
2013-11-09 09:14:46 +00:00
|
|
|
if ((res = av_frame_ref(data, cin->frame)) < 0)
|
2012-11-21 20:34:46 +00:00
|
|
|
return res;
|
|
|
|
|
2012-11-13 18:35:22 +00:00
|
|
|
*got_frame = 1;
|
2006-10-11 16:57:00 +00:00
|
|
|
|
|
|
|
return buf_size;
|
|
|
|
}
|
|
|
|
|
2008-03-21 03:11:20 +00:00
|
|
|
static av_cold int cinvideo_decode_end(AVCodecContext *avctx)
|
2006-10-11 16:57:00 +00:00
|
|
|
{
|
2007-04-08 20:24:16 +00:00
|
|
|
CinVideoContext *cin = avctx->priv_data;
|
2006-10-11 16:57:00 +00:00
|
|
|
|
2013-11-09 09:14:46 +00:00
|
|
|
av_frame_free(&cin->frame);
|
2006-10-11 16:57:00 +00:00
|
|
|
|
2012-10-25 13:46:19 +00:00
|
|
|
destroy_buffers(cin);
|
2006-10-11 16:57:00 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-01-25 21:40:11 +00:00
|
|
|
AVCodec ff_dsicinvideo_decoder = {
|
2011-07-17 10:54:31 +00:00
|
|
|
.name = "dsicinvideo",
|
2013-10-03 20:57:53 +00:00
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN video"),
|
2011-07-17 10:54:31 +00:00
|
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
2012-08-05 09:11:04 +00:00
|
|
|
.id = AV_CODEC_ID_DSICINVIDEO,
|
2011-07-17 10:54:31 +00:00
|
|
|
.priv_data_size = sizeof(CinVideoContext),
|
|
|
|
.init = cinvideo_decode_init,
|
|
|
|
.close = cinvideo_decode_end,
|
|
|
|
.decode = cinvideo_decode_frame,
|
2018-09-08 18:14:58 +00:00
|
|
|
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
|
2015-07-07 00:41:27 +00:00
|
|
|
.capabilities = AV_CODEC_CAP_DR1,
|
2006-10-11 16:57:00 +00:00
|
|
|
};
|