2003-11-07 22:39:18 +00:00
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/*
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* Quicktime Planar RGB (8BPS) Video Decoder
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* Copyright (C) 2003 Roberto Togni
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*
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2011-03-18 17:35:10 +00:00
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* This file is part of Libav.
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2006-10-07 15:30:46 +00:00
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*
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2011-03-18 17:35:10 +00:00
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* Libav is free software; you can redistribute it and/or
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2003-11-07 22:39:18 +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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2003-11-07 22:39:18 +00:00
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*
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2011-03-18 17:35:10 +00:00
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* Libav is distributed in the hope that it will be useful,
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2003-11-07 22:39:18 +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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2011-03-18 17:35:10 +00:00
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* License along with Libav; 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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2003-11-07 22:39:18 +00:00
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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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2008-06-07 13:14:49 +00:00
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* QT 8BPS Video Decoder by Roberto Togni
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2003-11-07 22:39:18 +00:00
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* For more information about the 8BPS format, visit:
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* http://www.pcisys.net/~melanson/codecs/
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*
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* Supports: PAL8 (RGB 8bpp, paletted)
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2007-02-07 01:48:09 +00:00
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* : BGR24 (RGB 24bpp) (can also output it as RGB32)
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* : RGB32 (RGB 32bpp, 4th plane is probably alpha and it's ignored)
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2003-11-07 22:39:18 +00:00
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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2012-08-06 13:49:32 +00:00
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#include <string.h>
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2003-11-07 22:39:18 +00:00
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2012-08-06 13:49:32 +00:00
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#include "libavutil/internal.h"
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2009-01-11 22:19:48 +00:00
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#include "libavutil/intreadwrite.h"
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2003-11-07 22:39:18 +00:00
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#include "avcodec.h"
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2012-11-10 12:22:56 +00:00
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#include "internal.h"
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2003-11-07 22:39:18 +00:00
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2012-10-06 10:10:34 +00:00
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static const enum AVPixelFormat pixfmt_rgb24[] = {
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AV_PIX_FMT_BGR24, AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE };
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2003-11-07 22:39:18 +00:00
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typedef struct EightBpsContext {
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2012-01-26 19:21:15 +00:00
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AVCodecContext *avctx;
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2003-11-07 22:39:18 +00:00
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2012-01-26 19:21:15 +00:00
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unsigned char planes;
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unsigned char planemap[4];
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2003-11-07 22:39:18 +00:00
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2012-01-26 19:21:15 +00:00
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uint32_t pal[256];
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2003-11-07 22:39:18 +00:00
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} EightBpsContext;
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2012-01-26 19:21:15 +00:00
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static int decode_frame(AVCodecContext *avctx, void *data,
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2012-11-13 18:35:22 +00:00
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int *got_frame, AVPacket *avpkt)
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2003-11-07 22:39:18 +00:00
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{
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2012-11-21 20:34:46 +00:00
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AVFrame *frame = data;
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2012-01-26 19:21:15 +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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EightBpsContext * const c = avctx->priv_data;
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const unsigned char *encoded = buf;
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unsigned char *pixptr, *pixptr_end;
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unsigned int height = avctx->height; // Real image height
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unsigned int dlen, p, row;
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2013-07-22 21:26:05 +00:00
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const unsigned char *lp, *dp, *ep;
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2012-01-26 19:21:15 +00:00
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unsigned char count;
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unsigned int px_inc;
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unsigned int planes = c->planes;
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unsigned char *planemap = c->planemap;
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2012-11-14 07:59:03 +00:00
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int ret;
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2012-01-26 19:21:15 +00:00
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2012-11-21 20:34:46 +00:00
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if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
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av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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2012-11-14 07:59:03 +00:00
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return ret;
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2012-01-26 19:21:15 +00:00
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}
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2013-07-22 21:26:05 +00:00
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ep = encoded + buf_size;
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2012-01-26 19:21:15 +00:00
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/* Set data pointer after line lengths */
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dp = encoded + planes * (height << 1);
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/* Ignore alpha plane, don't know what to do with it */
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if (planes == 4)
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planes--;
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2012-10-06 10:10:34 +00:00
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px_inc = planes + (avctx->pix_fmt == AV_PIX_FMT_RGB32);
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2012-01-26 19:21:15 +00:00
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for (p = 0; p < planes; p++) {
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/* Lines length pointer for this plane */
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lp = encoded + p * (height << 1);
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/* Decode a plane */
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for (row = 0; row < height; row++) {
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2012-11-21 20:34:46 +00:00
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pixptr = frame->data[0] + row * frame->linesize[0] + planemap[p];
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pixptr_end = pixptr + frame->linesize[0];
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2013-07-22 21:26:05 +00:00
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if (ep - lp < row * 2 + 2)
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return AVERROR_INVALIDDATA;
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2012-01-26 19:21:15 +00:00
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dlen = av_be2ne16(*(const unsigned short *)(lp + row * 2));
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/* Decode a row of this plane */
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while (dlen > 0) {
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2013-07-22 21:26:05 +00:00
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if (ep - dp <= 1)
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2012-11-14 07:59:03 +00:00
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return AVERROR_INVALIDDATA;
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2012-01-26 19:21:15 +00:00
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if ((count = *dp++) <= 127) {
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count++;
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dlen -= count + 1;
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if (pixptr + count * px_inc > pixptr_end)
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break;
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2013-07-22 21:26:05 +00:00
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if (ep - dp < count)
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2012-11-14 07:59:03 +00:00
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return AVERROR_INVALIDDATA;
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2012-01-26 19:21:15 +00:00
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while (count--) {
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*pixptr = *dp++;
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pixptr += px_inc;
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}
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} else {
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count = 257 - count;
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if (pixptr + count * px_inc > pixptr_end)
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break;
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while (count--) {
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*pixptr = *dp;
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pixptr += px_inc;
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}
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dp++;
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dlen -= 2;
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2005-12-22 01:10:11 +00:00
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}
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2012-01-26 19:21:15 +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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2012-01-26 19:21:15 +00:00
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}
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if (avctx->bits_per_coded_sample <= 8) {
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const uint8_t *pal = av_packet_get_side_data(avpkt,
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AV_PKT_DATA_PALETTE,
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NULL);
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if (pal) {
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2012-11-21 20:34:46 +00:00
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frame->palette_has_changed = 1;
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2012-01-26 19:21:15 +00:00
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memcpy(c->pal, pal, AVPALETTE_SIZE);
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2005-12-22 01:10:11 +00:00
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}
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2012-11-21 20:34:46 +00:00
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memcpy (frame->data[1], c->pal, AVPALETTE_SIZE);
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2012-01-26 19:21:15 +00:00
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}
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2012-11-13 18:35:22 +00:00
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*got_frame = 1;
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2005-12-22 01:10:11 +00:00
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2012-01-26 19:21:15 +00:00
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/* always report that the buffer was completely consumed */
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return buf_size;
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2003-11-07 22:39:18 +00:00
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}
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2008-03-21 03:11:20 +00:00
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static av_cold int decode_init(AVCodecContext *avctx)
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2003-11-07 22:39:18 +00:00
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{
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2012-01-26 19:21:15 +00:00
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EightBpsContext * const c = avctx->priv_data;
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c->avctx = avctx;
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switch (avctx->bits_per_coded_sample) {
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case 8:
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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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2012-01-26 19:21:15 +00:00
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c->planes = 1;
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c->planemap[0] = 0; // 1st plane is palette indexes
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break;
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case 24:
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avctx->pix_fmt = avctx->get_format(avctx, pixfmt_rgb24);
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c->planes = 3;
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c->planemap[0] = 2; // 1st plane is red
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c->planemap[1] = 1; // 2nd plane is green
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c->planemap[2] = 0; // 3rd plane is blue
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break;
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case 32:
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2012-10-06 10:10:34 +00:00
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avctx->pix_fmt = AV_PIX_FMT_RGB32;
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2012-01-26 19:21:15 +00:00
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c->planes = 4;
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2009-07-26 12:20:04 +00:00
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#if HAVE_BIGENDIAN
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2012-01-26 19:21:15 +00:00
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c->planemap[0] = 1; // 1st plane is red
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c->planemap[1] = 2; // 2nd plane is green
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c->planemap[2] = 3; // 3rd plane is blue
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c->planemap[3] = 0; // 4th plane is alpha???
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2003-11-07 22:39:18 +00:00
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#else
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2012-01-26 19:21:15 +00:00
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c->planemap[0] = 2; // 1st plane is red
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c->planemap[1] = 1; // 2nd plane is green
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c->planemap[2] = 0; // 3rd plane is blue
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c->planemap[3] = 3; // 4th plane is alpha???
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2003-11-07 22:39:18 +00:00
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#endif
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2012-01-26 19:21:15 +00:00
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break;
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default:
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av_log(avctx, AV_LOG_ERROR, "Error: Unsupported color depth: %u.\n",
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avctx->bits_per_coded_sample);
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2012-11-14 07:59:03 +00:00
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return AVERROR_INVALIDDATA;
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2012-01-26 19:21:15 +00:00
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}
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return 0;
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2003-11-07 22:39:18 +00:00
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}
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2011-01-25 21:40:11 +00:00
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AVCodec ff_eightbps_decoder = {
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2011-07-17 10:54:31 +00:00
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.name = "8bps",
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.type = AVMEDIA_TYPE_VIDEO,
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2012-08-05 09:11:04 +00:00
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.id = AV_CODEC_ID_8BPS,
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2011-07-17 10:54:31 +00:00
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.priv_data_size = sizeof(EightBpsContext),
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.init = decode_init,
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.decode = decode_frame,
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.capabilities = CODEC_CAP_DR1,
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2011-08-03 21:27:50 +00:00
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.long_name = NULL_IF_CONFIG_SMALL("QuickTime 8BPS video"),
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2003-11-07 22:39:18 +00:00
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};
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