2004-11-17 03:45:53 +00:00
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/*
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* QPEG codec
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* Copyright (c) 2004 Konstantin Shishkov
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*
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2006-10-07 15:30:46 +00:00
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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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2004-11-17 03:45:53 +00:00
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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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2006-10-07 15:30:46 +00:00
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* version 2.1 of the License, or (at your option) any later version.
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2004-11-17 03:45:53 +00:00
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*
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2006-10-07 15:30:46 +00:00
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* FFmpeg is distributed in the hope that it will be useful,
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2004-11-17 03:45:53 +00:00
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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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2006-10-07 15:30:46 +00:00
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* License along with FFmpeg; if not, write to the Free Software
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2006-01-12 22:43:26 +00:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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2004-11-17 03:45:53 +00:00
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*/
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2005-12-17 18:14:38 +00:00
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2004-11-17 03:45:53 +00:00
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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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2004-11-17 03:45:53 +00:00
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* QPEG codec.
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*/
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2005-12-17 18:14:38 +00:00
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2004-11-17 03:45:53 +00:00
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#include "avcodec.h"
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typedef struct QpegContext{
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AVCodecContext *avctx;
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2011-04-28 12:06:36 +00:00
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AVFrame pic, ref;
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2011-04-09 13:49:51 +00:00
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uint32_t pal[256];
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2004-11-17 03:45:53 +00:00
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} QpegContext;
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2011-12-29 04:16:34 +00:00
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static int qpeg_decode_intra(const uint8_t *src, uint8_t *dst, int size,
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2005-12-22 01:10:11 +00:00
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int stride, int width, int height)
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2004-11-17 03:45:53 +00:00
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{
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int i;
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int code;
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int c0, c1;
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int run, copy;
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int filled = 0;
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2005-08-13 09:12:09 +00:00
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int rows_to_go;
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2005-12-17 18:14:38 +00:00
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2005-08-13 09:12:09 +00:00
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rows_to_go = height;
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2004-11-17 03:45:53 +00:00
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height--;
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dst = dst + height * stride;
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2005-12-17 18:14:38 +00:00
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2005-08-13 09:12:09 +00:00
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while((size > 0) && (rows_to_go > 0)) {
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2005-12-22 01:10:11 +00:00
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code = *src++;
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size--;
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run = copy = 0;
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if(code == 0xFC) /* end-of-picture code */
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break;
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if(code >= 0xF8) { /* very long run */
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c0 = *src++;
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c1 = *src++;
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size -= 2;
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run = ((code & 0x7) << 16) + (c0 << 8) + c1 + 2;
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} else if (code >= 0xF0) { /* long run */
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c0 = *src++;
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size--;
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run = ((code & 0xF) << 8) + c0 + 2;
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} else if (code >= 0xE0) { /* short run */
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run = (code & 0x1F) + 2;
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} else if (code >= 0xC0) { /* very long copy */
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c0 = *src++;
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c1 = *src++;
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size -= 2;
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copy = ((code & 0x3F) << 16) + (c0 << 8) + c1 + 1;
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} else if (code >= 0x80) { /* long copy */
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c0 = *src++;
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size--;
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copy = ((code & 0x7F) << 8) + c0 + 1;
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} else { /* short copy */
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copy = code + 1;
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}
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2005-12-17 18:14:38 +00:00
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2005-12-22 01:10:11 +00:00
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/* perform actual run or copy */
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if(run) {
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int p;
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2005-12-17 18:14:38 +00:00
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2005-12-22 01:10:11 +00:00
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p = *src++;
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size--;
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for(i = 0; i < run; i++) {
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dst[filled++] = p;
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if (filled >= width) {
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filled = 0;
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dst -= stride;
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2005-08-13 09:12:09 +00:00
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rows_to_go--;
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if(rows_to_go <= 0)
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break;
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2005-12-22 01:10:11 +00:00
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}
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}
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} else {
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2005-08-13 09:12:09 +00:00
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size -= copy;
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2011-12-29 04:16:34 +00:00
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if (size<0)
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return AVERROR_INVALIDDATA;
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2005-12-22 01:10:11 +00:00
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for(i = 0; i < copy; i++) {
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dst[filled++] = *src++;
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if (filled >= width) {
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filled = 0;
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dst -= stride;
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2005-08-13 09:12:09 +00:00
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rows_to_go--;
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if(rows_to_go <= 0)
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break;
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2005-12-22 01:10:11 +00:00
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}
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}
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}
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2004-11-17 03:45:53 +00:00
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}
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2011-12-29 04:16:34 +00:00
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return 0;
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2004-11-17 03:45:53 +00:00
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}
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2008-06-24 20:01:31 +00:00
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static const int qpeg_table_h[16] =
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2004-11-17 03:45:53 +00:00
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{ 0x00, 0x20, 0x20, 0x20, 0x18, 0x10, 0x10, 0x20, 0x10, 0x08, 0x18, 0x08, 0x08, 0x18, 0x10, 0x04};
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2008-06-24 20:01:31 +00:00
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static const int qpeg_table_w[16] =
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2004-11-17 03:45:53 +00:00
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{ 0x00, 0x20, 0x18, 0x08, 0x18, 0x10, 0x20, 0x10, 0x08, 0x10, 0x20, 0x20, 0x08, 0x10, 0x18, 0x04};
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2005-12-17 18:14:38 +00:00
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2004-11-17 03:45:53 +00:00
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/* Decodes delta frames */
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2008-02-01 15:39:25 +00:00
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static void qpeg_decode_inter(const uint8_t *src, uint8_t *dst, int size,
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2005-12-22 01:10:11 +00:00
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int stride, int width, int height,
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2008-02-01 15:41:16 +00:00
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int delta, const uint8_t *ctable, uint8_t *refdata)
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2004-11-17 03:45:53 +00:00
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{
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int i, j;
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int code;
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int filled = 0;
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2005-08-13 09:12:09 +00:00
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int orig_height;
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2005-12-17 18:14:38 +00:00
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2011-04-28 12:06:36 +00:00
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if(!refdata)
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refdata= dst;
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2004-11-17 03:45:53 +00:00
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/* copy prev frame */
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for(i = 0; i < height; i++)
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2011-04-28 12:06:36 +00:00
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memcpy(dst + (i * stride), refdata + (i * stride), width);
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2005-12-17 18:14:38 +00:00
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2005-08-13 09:12:09 +00:00
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orig_height = height;
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2004-11-17 03:45:53 +00:00
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height--;
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dst = dst + height * stride;
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2005-08-13 09:12:09 +00:00
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while((size > 0) && (height >= 0)) {
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2005-12-22 01:10:11 +00:00
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code = *src++;
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size--;
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2005-12-17 18:14:38 +00:00
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2005-12-22 01:10:11 +00:00
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if(delta) {
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/* motion compensation */
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2012-03-03 02:50:05 +00:00
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while(size > 0 && (code & 0xF0) == 0xF0) {
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2005-12-22 01:10:11 +00:00
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if(delta == 1) {
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int me_idx;
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int me_w, me_h, me_x, me_y;
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uint8_t *me_plane;
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int corr, val;
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2005-12-17 18:14:38 +00:00
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2005-12-22 01:10:11 +00:00
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/* get block size by index */
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me_idx = code & 0xF;
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me_w = qpeg_table_w[me_idx];
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me_h = qpeg_table_h[me_idx];
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2005-12-17 18:14:38 +00:00
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2005-12-22 01:10:11 +00:00
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/* extract motion vector */
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corr = *src++;
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size--;
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2004-11-17 03:45:53 +00:00
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2005-12-22 01:10:11 +00:00
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val = corr >> 4;
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if(val > 7)
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val -= 16;
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me_x = val;
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2005-12-17 18:14:38 +00:00
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2005-12-22 01:10:11 +00:00
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val = corr & 0xF;
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if(val > 7)
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val -= 16;
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me_y = val;
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2005-12-17 18:14:38 +00:00
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2005-08-13 09:12:09 +00:00
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/* check motion vector */
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if ((me_x + filled < 0) || (me_x + me_w + filled > width) ||
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(height - me_y - me_h < 0) || (height - me_y > orig_height) ||
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(filled + me_w > width) || (height - me_h < 0))
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av_log(NULL, AV_LOG_ERROR, "Bogus motion vector (%i,%i), block size %ix%i at %i,%i\n",
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me_x, me_y, me_w, me_h, filled, height);
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else {
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/* do motion compensation */
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2011-04-28 12:06:36 +00:00
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me_plane = refdata + (filled + me_x) + (height - me_y) * stride;
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2005-08-13 09:12:09 +00:00
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for(j = 0; j < me_h; j++) {
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for(i = 0; i < me_w; i++)
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2011-04-28 12:06:36 +00:00
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dst[filled + i - (j * stride)] = me_plane[i - (j * stride)];
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2005-08-13 09:12:09 +00:00
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}
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2005-12-22 01:10:11 +00:00
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}
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}
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code = *src++;
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size--;
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}
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}
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2005-12-17 18:14:38 +00:00
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2005-12-22 01:10:11 +00:00
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if(code == 0xE0) /* end-of-picture code */
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break;
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if(code > 0xE0) { /* run code: 0xE1..0xFF */
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int p;
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2004-11-17 03:45:53 +00:00
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2005-12-22 01:10:11 +00:00
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code &= 0x1F;
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p = *src++;
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size--;
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for(i = 0; i <= code; i++) {
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dst[filled++] = p;
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if(filled >= width) {
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filled = 0;
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dst -= stride;
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height--;
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2012-03-03 02:37:52 +00:00
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if(height < 0)
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break;
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2005-12-22 01:10:11 +00:00
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}
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}
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} else if(code >= 0xC0) { /* copy code: 0xC0..0xDF */
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code &= 0x1F;
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2005-12-17 18:14:38 +00:00
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2012-03-03 02:50:05 +00:00
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if(code + 1 > size)
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break;
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2005-12-22 01:10:11 +00:00
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for(i = 0; i <= code; i++) {
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dst[filled++] = *src++;
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if(filled >= width) {
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filled = 0;
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dst -= stride;
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height--;
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2012-03-03 02:37:52 +00:00
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if(height < 0)
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break;
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2005-12-22 01:10:11 +00:00
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}
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}
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size -= code + 1;
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} else if(code >= 0x80) { /* skip code: 0x80..0xBF */
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int skip;
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2005-12-17 18:14:38 +00:00
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2005-12-22 01:10:11 +00:00
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code &= 0x3F;
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/* codes 0x80 and 0x81 are actually escape codes,
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skip value minus constant is in the next byte */
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2012-03-03 02:50:05 +00:00
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if(!code) {
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skip = (*src++) + 64; size--;
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} else if(code == 1) {
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skip = (*src++) + 320; size--;
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} else
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2005-12-22 01:10:11 +00:00
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skip = code;
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filled += skip;
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while( filled >= width) {
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filled -= width;
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dst -= stride;
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height--;
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2005-08-13 09:12:09 +00:00
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if(height < 0)
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break;
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2005-12-22 01:10:11 +00:00
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}
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} else {
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/* zero code treated as one-pixel skip */
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if(code)
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dst[filled++] = ctable[code & 0x7F];
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else
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filled++;
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if(filled >= width) {
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filled = 0;
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dst -= stride;
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height--;
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}
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}
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2004-11-17 03:45:53 +00:00
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}
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}
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2005-12-17 18:14:38 +00:00
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static int decode_frame(AVCodecContext *avctx,
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2004-11-17 03:45:53 +00:00
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void *data, int *data_size,
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2009-04-07 15:59:50 +00:00
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AVPacket *avpkt)
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2004-11-17 03:45:53 +00:00
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{
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2009-04-07 15:59:50 +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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2004-11-17 03:45:53 +00:00
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QpegContext * const a = avctx->priv_data;
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2012-03-02 23:09:47 +00:00
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AVFrame * p = &a->pic;
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AVFrame * ref= &a->ref;
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2004-11-17 03:45:53 +00:00
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uint8_t* outdata;
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2011-12-29 04:16:34 +00:00
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int delta, ret = 0;
|
2011-04-09 13:49:51 +00:00
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const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
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2005-12-17 18:14:38 +00:00
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2011-04-28 12:06:36 +00:00
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if(ref->data[0])
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avctx->release_buffer(avctx, ref);
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FFSWAP(AVFrame, *ref, *p);
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2011-04-28 02:31:02 +00:00
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2011-04-28 12:06:36 +00:00
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p->reference= 3;
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2011-04-28 02:31:02 +00:00
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if(avctx->get_buffer(avctx, p) < 0){
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av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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2004-11-17 03:45:53 +00:00
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return -1;
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}
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outdata = a->pic.data[0];
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if(buf[0x85] == 0x10) {
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2011-12-29 04:16:34 +00:00
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ret = qpeg_decode_intra(buf+0x86, outdata, buf_size - 0x86, a->pic.linesize[0], avctx->width, avctx->height);
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2004-11-17 03:45:53 +00:00
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} else {
|
2005-12-22 01:10:11 +00:00
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delta = buf[0x85];
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2011-04-28 12:06:36 +00:00
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qpeg_decode_inter(buf+0x86, outdata, buf_size - 0x86, a->pic.linesize[0], avctx->width, avctx->height, delta, buf + 4, a->ref.data[0]);
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2004-11-17 03:45:53 +00:00
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}
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|
|
2011-12-29 04:16:34 +00:00
|
|
|
if (ret<0)
|
|
|
|
return ret;
|
|
|
|
|
2004-11-17 03:45:53 +00:00
|
|
|
/* make the palette available on the way out */
|
2011-04-09 13:49:51 +00:00
|
|
|
if (pal) {
|
2004-11-17 03:45:53 +00:00
|
|
|
a->pic.palette_has_changed = 1;
|
2011-04-09 13:49:51 +00:00
|
|
|
memcpy(a->pal, pal, AVPALETTE_SIZE);
|
2004-11-17 03:45:53 +00:00
|
|
|
}
|
2011-04-09 13:49:51 +00:00
|
|
|
memcpy(a->pic.data[1], a->pal, AVPALETTE_SIZE);
|
2004-11-17 03:45:53 +00:00
|
|
|
|
|
|
|
*data_size = sizeof(AVFrame);
|
|
|
|
*(AVFrame*)data = a->pic;
|
2005-12-17 18:14:38 +00:00
|
|
|
|
2004-11-17 03:45:53 +00:00
|
|
|
return buf_size;
|
|
|
|
}
|
|
|
|
|
2008-03-21 03:11:20 +00:00
|
|
|
static av_cold int decode_init(AVCodecContext *avctx){
|
2004-11-17 03:45:53 +00:00
|
|
|
QpegContext * const a = avctx->priv_data;
|
2005-12-17 18:14:38 +00:00
|
|
|
|
2011-05-02 00:15:15 +00:00
|
|
|
avcodec_get_frame_defaults(&a->pic);
|
|
|
|
avcodec_get_frame_defaults(&a->ref);
|
2004-11-17 03:45:53 +00:00
|
|
|
a->avctx = avctx;
|
|
|
|
avctx->pix_fmt= PIX_FMT_PAL8;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-03-21 03:11:20 +00:00
|
|
|
static av_cold int decode_end(AVCodecContext *avctx){
|
2004-11-17 03:45:53 +00:00
|
|
|
QpegContext * const a = avctx->priv_data;
|
2012-02-27 07:51:20 +00:00
|
|
|
AVFrame * const p = &a->pic;
|
2012-03-02 23:09:47 +00:00
|
|
|
AVFrame * const ref= &a->ref;
|
2005-12-17 18:14:38 +00:00
|
|
|
|
2005-03-28 20:40:21 +00:00
|
|
|
if(p->data[0])
|
|
|
|
avctx->release_buffer(avctx, p);
|
2011-04-28 12:06:36 +00:00
|
|
|
if(ref->data[0])
|
|
|
|
avctx->release_buffer(avctx, ref);
|
2004-11-17 03:45:53 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-01-25 21:40:11 +00:00
|
|
|
AVCodec ff_qpeg_decoder = {
|
2011-07-17 10:54:31 +00:00
|
|
|
.name = "qpeg",
|
|
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
|
|
.id = CODEC_ID_QPEG,
|
|
|
|
.priv_data_size = sizeof(QpegContext),
|
|
|
|
.init = decode_init,
|
|
|
|
.close = decode_end,
|
|
|
|
.decode = decode_frame,
|
|
|
|
.capabilities = CODEC_CAP_DR1,
|
2008-06-12 21:50:13 +00:00
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("Q-team QPEG"),
|
2004-11-17 03:45:53 +00:00
|
|
|
};
|