2003-11-08 00:39:18 +02:00
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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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2006-10-07 18:30:46 +03:00
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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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2003-11-08 00:39:18 +02:00
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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 18:30:46 +03:00
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* version 2.1 of the License, or (at your option) any later version.
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2003-11-08 00:39:18 +02:00
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*
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2006-10-07 18:30:46 +03:00
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* FFmpeg is distributed in the hope that it will be useful,
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2003-11-08 00:39:18 +02:00
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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 18:30:46 +03:00
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* License along with FFmpeg; if not, write to the Free Software
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2006-01-13 00:43:26 +02:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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2003-11-08 00:39:18 +02:00
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*/
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/**
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2010-04-20 17:45:34 +03:00
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* @file
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2008-06-07 16:14:49 +03:00
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* QT 8BPS Video Decoder by Roberto Togni
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2003-11-08 00:39:18 +02:00
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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 03:48:09 +02:00
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* : BGR24 (RGB 24bpp) (can also output it as RGB32)
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2011-12-07 01:06:27 +03:00
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* : RGB32 (RGB 32bpp, 4th plane is alpha)
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2003-11-08 00:39:18 +02:00
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*/
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2012-08-06 16:49:32 +03:00
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#include <string.h>
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2003-11-08 00:39:18 +02:00
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2022-08-24 21:28:16 +02:00
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#include "libavutil/bswap.h"
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2012-08-06 16:49:32 +03:00
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#include "libavutil/internal.h"
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2003-11-08 00:39:18 +02:00
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#include "avcodec.h"
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2022-03-16 19:18:28 +02:00
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#include "codec_internal.h"
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2021-03-17 23:43:32 +02:00
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#include "decode.h"
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2003-11-08 00:39:18 +02:00
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2012-10-06 13:10:34 +03:00
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static const enum AVPixelFormat pixfmt_rgb24[] = {
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2016-09-28 17:49:39 +02:00
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AV_PIX_FMT_BGR24, AV_PIX_FMT_0RGB32, AV_PIX_FMT_NONE };
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2003-11-08 00:39:18 +02:00
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typedef struct EightBpsContext {
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2012-01-26 22:21:15 +03:00
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AVCodecContext *avctx;
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2003-11-08 00:39:18 +02:00
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2012-01-26 22:21:15 +03:00
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unsigned char planes;
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unsigned char planemap[4];
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2003-11-08 00:39:18 +02:00
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} EightBpsContext;
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2022-03-30 21:33:24 +02:00
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static int decode_frame(AVCodecContext *avctx, AVFrame *frame,
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2012-11-13 21:35:22 +03:00
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int *got_frame, AVPacket *avpkt)
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2003-11-08 00:39:18 +02:00
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{
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2012-01-26 22:21:15 +03:00
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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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2013-07-23 00:26:05 +03:00
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const unsigned char *lp, *dp, *ep;
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2012-01-26 22:21:15 +03:00
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unsigned char count;
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2016-09-28 17:49:39 +02:00
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unsigned int px_inc;
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2012-01-26 22:21:15 +03:00
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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 10:59:03 +03:00
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int ret;
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2012-01-26 22:21:15 +03:00
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2022-09-17 10:32:16 +02:00
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if (buf_size < planes * height * 2)
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2022-08-22 22:10:09 +02:00
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return AVERROR_INVALIDDATA;
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lavc: factorize ff_{thread_,re,}get_buffer error messages.
Coccinelle profile used:
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expression r, ctx, f, loglevel, str, flags;
@@
-if ((r = ff_get_buffer(ctx, f, flags)) < 0) {
- av_log(ctx, loglevel, str);
- return r;
-}
+if ((r = ff_get_buffer(ctx, f, flags)) < 0)
+ return r;
@@
expression r, ctx, f, loglevel, str;
@@
-if ((r = ff_reget_buffer(ctx, f)) < 0) {
- av_log(ctx, loglevel, str);
- return r;
-}
+if ((r = ff_reget_buffer(ctx, f)) < 0)
+ return r;
@@
expression r, ctx, f, loglevel, str, flags;
@@
-if ((r = ff_thread_get_buffer(ctx, f, flags)) < 0) {
- av_log(ctx, loglevel, str);
- return r;
-}
+if ((r = ff_thread_get_buffer(ctx, f, flags)) < 0)
+ return r;
...along with some manual patches for the remaining ones.
2013-03-12 10:41:53 +03:00
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if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
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2012-11-14 10:59:03 +03:00
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return ret;
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2012-01-26 22:21:15 +03:00
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2013-07-23 00:26:05 +03:00
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ep = encoded + buf_size;
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2012-01-26 22:21:15 +03:00
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/* Set data pointer after line lengths */
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dp = encoded + planes * (height << 1);
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2016-09-28 17:49:39 +02:00
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px_inc = planes + (avctx->pix_fmt == AV_PIX_FMT_0RGB32);
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2012-01-26 22:21:15 +03:00
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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 23:34:46 +03:00
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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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2013-07-23 00:26:05 +03:00
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if (ep - lp < row * 2 + 2)
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return AVERROR_INVALIDDATA;
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2012-01-26 22:21:15 +03:00
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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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2013-07-23 00:26:05 +03:00
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if (ep - dp <= 1)
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2012-11-14 10:59:03 +03:00
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return AVERROR_INVALIDDATA;
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2012-01-26 22:21:15 +03:00
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if ((count = *dp++) <= 127) {
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count++;
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dlen -= count + 1;
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2016-09-28 17:49:39 +02:00
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if (pixptr_end - pixptr < count * px_inc)
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2012-01-26 22:21:15 +03:00
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break;
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2013-07-23 00:26:05 +03:00
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if (ep - dp < count)
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2012-11-14 10:59:03 +03:00
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return AVERROR_INVALIDDATA;
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2012-01-26 22:21:15 +03:00
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while (count--) {
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*pixptr = *dp++;
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2016-09-28 17:49:39 +02:00
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pixptr += px_inc;
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2012-01-26 22:21:15 +03:00
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}
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} else {
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count = 257 - count;
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2016-09-28 17:49:39 +02:00
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if (pixptr_end - pixptr < count * px_inc)
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2012-01-26 22:21:15 +03:00
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break;
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while (count--) {
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*pixptr = *dp;
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2016-09-28 17:49:39 +02:00
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pixptr += px_inc;
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2012-01-26 22:21:15 +03:00
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}
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dp++;
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dlen -= 2;
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2005-12-22 03:10:11 +02:00
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}
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2012-01-26 22:21:15 +03:00
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}
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2005-12-22 03:10:11 +02:00
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}
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2012-01-26 22:21:15 +03:00
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}
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2014-03-11 22:09:07 +03:00
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if (avctx->bits_per_coded_sample <= 8) {
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2023-05-18 03:39:57 +02:00
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#if FF_API_PALETTE_HAS_CHANGED
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FF_DISABLE_DEPRECATION_WARNINGS
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frame->palette_has_changed =
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#endif
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ff_copy_palette(frame->data[1], avpkt, avctx);
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#if FF_API_PALETTE_HAS_CHANGED
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FF_ENABLE_DEPRECATION_WARNINGS
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#endif
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2012-01-26 22:21:15 +03:00
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}
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2012-11-13 21:35:22 +03:00
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*got_frame = 1;
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2005-12-22 03:10:11 +02:00
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2012-01-26 22:21:15 +03:00
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/* always report that the buffer was completely consumed */
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return buf_size;
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2003-11-08 00:39:18 +02:00
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}
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2008-03-21 05:11:20 +02:00
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static av_cold int decode_init(AVCodecContext *avctx)
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2003-11-08 00:39:18 +02:00
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{
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2012-01-26 22:21:15 +03:00
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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 13:10:34 +03:00
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avctx->pix_fmt = AV_PIX_FMT_PAL8;
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2012-01-26 22:21:15 +03:00
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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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2014-03-06 19:48:18 +03:00
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avctx->pix_fmt = ff_get_format(avctx, pixfmt_rgb24);
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2012-01-26 22:21:15 +03:00
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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 13:10:34 +03:00
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avctx->pix_fmt = AV_PIX_FMT_RGB32;
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2012-01-26 22:21:15 +03:00
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c->planes = 4;
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2013-07-19 14:51:51 +03:00
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/* handle planemap setup later for decoding rgb24 data as rbg32 */
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2012-01-26 22:21:15 +03:00
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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 10:59:03 +03:00
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return AVERROR_INVALIDDATA;
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2012-01-26 22:21:15 +03:00
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}
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2013-07-19 14:51:51 +03:00
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if (avctx->pix_fmt == AV_PIX_FMT_RGB32) {
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c->planemap[0] = HAVE_BIGENDIAN ? 1 : 2; // 1st plane is red
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c->planemap[1] = HAVE_BIGENDIAN ? 2 : 1; // 2nd plane is green
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c->planemap[2] = HAVE_BIGENDIAN ? 3 : 0; // 3rd plane is blue
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2013-08-16 12:43:26 +03:00
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c->planemap[3] = HAVE_BIGENDIAN ? 0 : 3; // 4th plane is alpha
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2013-07-19 14:51:51 +03:00
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}
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2012-01-26 22:21:15 +03:00
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return 0;
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2003-11-08 00:39:18 +02:00
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}
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2022-03-16 22:09:54 +02:00
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const FFCodec ff_eightbps_decoder = {
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.p.name = "8bps",
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2022-08-29 13:38:02 +02:00
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CODEC_LONG_NAME("QuickTime 8BPS video"),
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2022-03-16 22:09:54 +02:00
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_8BPS,
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2011-07-17 13:54:31 +03:00
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.priv_data_size = sizeof(EightBpsContext),
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.init = decode_init,
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2022-03-30 23:28:24 +02:00
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FF_CODEC_DECODE_CB(decode_frame),
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2022-03-16 22:09:54 +02:00
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.p.capabilities = AV_CODEC_CAP_DR1,
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2003-11-08 00:39:18 +02:00
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};
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