2003-10-02 05:20:07 +00:00
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/*
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* Westwood Studios VQA Video Decoder
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* Copyright (C) 2003 the ffmpeg project
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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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2003-10-02 05:20:07 +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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2003-10-02 05:20:07 +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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2003-10-02 05:20:07 +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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2003-10-02 05:20:07 +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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2011-07-14 01:56:07 +00:00
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* VQA Video Decoder
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* @author Mike Melanson (melanson@pcisys.net)
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* @see http://wiki.multimedia.cx/index.php?title=VQA
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2003-10-02 05:20:07 +00:00
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*
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2003-10-04 17:47:22 +00:00
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* The VQA video decoder outputs PAL8 or RGB555 colorspace data, depending
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* on the type of data in the file.
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2003-10-02 05:20:07 +00:00
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*
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* This decoder needs the 42-byte VQHD header from the beginning
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* of the VQA file passed through the extradata field. The VQHD header
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* is laid out as:
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*
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* bytes 0-3 chunk fourcc: 'VQHD'
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* bytes 4-7 chunk size in big-endian format, should be 0x0000002A
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2003-10-04 17:47:22 +00:00
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* bytes 8-49 VQHD chunk data
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2003-10-02 05:20:07 +00:00
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*
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2003-10-04 17:47:22 +00:00
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* Bytes 8-49 are what this decoder expects to see.
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2003-10-02 05:20:07 +00:00
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*
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* Briefly, VQA is a vector quantized animation format that operates in a
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2003-10-04 17:47:22 +00:00
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* VGA palettized colorspace. It operates on pixel vectors (blocks)
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2003-10-02 05:20:07 +00:00
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* of either 4x2 or 4x4 in size. Compressed VQA chunks can contain vector
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* codebooks, palette information, and code maps for rendering vectors onto
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* frames. Any of these components can also be compressed with a run-length
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* encoding (RLE) algorithm commonly referred to as "format80".
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*
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* VQA takes a novel approach to rate control. Each group of n frames
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* (usually, n = 8) relies on a different vector codebook. Rather than
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* transporting an entire codebook every 8th frame, the new codebook is
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* broken up into 8 pieces and sent along with the compressed video chunks
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* for each of the 8 frames preceding the 8 frames which require the
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* codebook. A full codebook is also sent on the very first frame of a
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* file. This is an interesting technique, although it makes random file
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* seeking difficult despite the fact that the frames are all intracoded.
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*
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2008-05-26 23:14:25 +00:00
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* V1,2 VQA uses 12-bit codebook indexes. If the 12-bit indexes were
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2003-10-02 05:20:07 +00:00
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* packed into bytes and then RLE compressed, bytewise, the results would
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* be poor. That is why the coding method divides each index into 2 parts,
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2003-10-04 17:47:22 +00:00
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* the top 4 bits and the bottom 8 bits, then RL encodes the 4-bit pieces
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2003-10-02 05:20:07 +00:00
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* together and the 8-bit pieces together. If most of the vectors are
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* clustered into one group of 256 vectors, most of the 4-bit index pieces
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* should be the same.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.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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2011-02-07 13:37:08 +00:00
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#include "libavutil/imgutils.h"
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2003-10-02 05:20:07 +00:00
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#include "avcodec.h"
|
2012-03-16 00:56:41 +00:00
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#include "bytestream.h"
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2003-10-02 05:20:07 +00:00
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#define PALETTE_COUNT 256
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#define VQA_HEADER_SIZE 0x2A
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|
2003-10-04 17:47:22 +00:00
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/* allocate the maximum vector space, regardless of the file version:
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* (0xFF00 codebook vectors + 0x100 solid pixel vectors) * (4x4 pixels/block) */
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#define MAX_CODEBOOK_VECTORS 0xFF00
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#define SOLID_PIXEL_VECTORS 0x100
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#define MAX_VECTORS (MAX_CODEBOOK_VECTORS + SOLID_PIXEL_VECTORS)
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#define MAX_CODEBOOK_SIZE (MAX_VECTORS * 4 * 4)
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2003-10-02 05:20:07 +00:00
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2004-03-14 04:04:08 +00:00
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#define CBF0_TAG MKBETAG('C', 'B', 'F', '0')
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#define CBFZ_TAG MKBETAG('C', 'B', 'F', 'Z')
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#define CBP0_TAG MKBETAG('C', 'B', 'P', '0')
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#define CBPZ_TAG MKBETAG('C', 'B', 'P', 'Z')
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#define CPL0_TAG MKBETAG('C', 'P', 'L', '0')
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#define CPLZ_TAG MKBETAG('C', 'P', 'L', 'Z')
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#define VPTZ_TAG MKBETAG('V', 'P', 'T', 'Z')
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2003-10-02 05:20:07 +00:00
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typedef struct VqaContext {
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AVCodecContext *avctx;
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AVFrame frame;
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2012-03-16 00:56:41 +00:00
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GetByteContext gb;
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2003-10-02 05:20:07 +00:00
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2006-09-30 23:49:09 +00:00
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uint32_t palette[PALETTE_COUNT];
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2003-10-02 05:20:07 +00:00
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int width; /* width of a frame */
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int height; /* height of a frame */
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int vector_width; /* width of individual vector */
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int vector_height; /* height of individual vector */
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int vqa_version; /* this should be either 1, 2 or 3 */
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unsigned char *codebook; /* the current codebook */
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2003-10-04 17:47:22 +00:00
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int codebook_size;
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2003-10-02 05:20:07 +00:00
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unsigned char *next_codebook_buffer; /* accumulator for next codebook */
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int next_codebook_buffer_index;
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unsigned char *decode_buffer;
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int decode_buffer_size;
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/* number of frames to go before replacing codebook */
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int partial_countdown;
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int partial_count;
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} VqaContext;
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|
2008-03-21 03:11:20 +00:00
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static av_cold int vqa_decode_init(AVCodecContext *avctx)
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2003-10-02 05:20:07 +00:00
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{
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2007-04-08 20:24:16 +00:00
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VqaContext *s = avctx->priv_data;
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2008-02-19 22:09:08 +00:00
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int i, j, codebook_index;
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2003-10-02 05:20:07 +00:00
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s->avctx = avctx;
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avctx->pix_fmt = PIX_FMT_PAL8;
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/* make sure the extradata made it */
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if (s->avctx->extradata_size != VQA_HEADER_SIZE) {
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2003-11-03 13:26:22 +00:00
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av_log(s->avctx, AV_LOG_ERROR, " VQA video: expected extradata size of %d\n", VQA_HEADER_SIZE);
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2003-10-02 05:20:07 +00:00
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return -1;
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}
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/* load up the VQA parameters from the header */
|
2012-03-16 00:56:41 +00:00
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s->vqa_version = s->avctx->extradata[0];
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s->width = AV_RL16(&s->avctx->extradata[6]);
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s->height = AV_RL16(&s->avctx->extradata[8]);
|
2010-09-07 19:15:29 +00:00
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if(av_image_check_size(s->width, s->height, 0, avctx)){
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2005-01-12 00:16:25 +00:00
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s->width= s->height= 0;
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return -1;
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}
|
2012-03-16 00:56:41 +00:00
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s->vector_width = s->avctx->extradata[10];
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s->vector_height = s->avctx->extradata[11];
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s->partial_count = s->partial_countdown = s->avctx->extradata[13];
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2003-10-02 05:20:07 +00:00
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/* the vector dimensions have to meet very stringent requirements */
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if ((s->vector_width != 4) ||
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((s->vector_height != 2) && (s->vector_height != 4))) {
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/* return without further initialization */
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return -1;
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}
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/* allocate codebooks */
|
2003-10-04 17:47:22 +00:00
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s->codebook_size = MAX_CODEBOOK_SIZE;
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s->codebook = av_malloc(s->codebook_size);
|
2012-03-16 13:23:57 +00:00
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if (!s->codebook)
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goto fail;
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2003-10-04 17:47:22 +00:00
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s->next_codebook_buffer = av_malloc(s->codebook_size);
|
2012-03-16 13:23:57 +00:00
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if (!s->next_codebook_buffer)
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goto fail;
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/* allocate decode buffer */
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s->decode_buffer_size = (s->width / s->vector_width) *
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(s->height / s->vector_height) * 2;
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s->decode_buffer = av_malloc(s->decode_buffer_size);
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if (!s->decode_buffer)
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goto fail;
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2003-10-04 17:47:22 +00:00
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/* initialize the solid-color vectors */
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if (s->vector_height == 4) {
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codebook_index = 0xFF00 * 16;
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for (i = 0; i < 256; i++)
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for (j = 0; j < 16; j++)
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s->codebook[codebook_index++] = i;
|
2003-10-02 05:20:07 +00:00
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} else {
|
2003-10-04 17:47:22 +00:00
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codebook_index = 0xF00 * 8;
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for (i = 0; i < 256; i++)
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for (j = 0; j < 8; j++)
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s->codebook[codebook_index++] = i;
|
2003-10-02 05:20:07 +00:00
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}
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s->next_codebook_buffer_index = 0;
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s->frame.data[0] = NULL;
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return 0;
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2012-03-16 13:23:57 +00:00
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fail:
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av_freep(&s->codebook);
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av_freep(&s->next_codebook_buffer);
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av_freep(&s->decode_buffer);
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return AVERROR(ENOMEM);
|
2003-10-02 05:20:07 +00:00
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}
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#define CHECK_COUNT() \
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if (dest_index + count > dest_size) { \
|
2003-11-03 13:26:22 +00:00
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av_log(NULL, AV_LOG_ERROR, " VQA video: decode_format80 problem: next op would overflow dest_index\n"); \
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av_log(NULL, AV_LOG_ERROR, " VQA video: current dest_index = %d, count = %d, dest_size = %d\n", \
|
2003-10-02 05:20:07 +00:00
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dest_index, count, dest_size); \
|
2012-03-16 00:56:41 +00:00
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return AVERROR_INVALIDDATA; \
|
2003-10-02 05:20:07 +00:00
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}
|
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|
2012-03-16 00:56:41 +00:00
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#define CHECK_COPY(idx) \
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if (idx < 0 || idx + count > dest_size) { \
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av_log(NULL, AV_LOG_ERROR, " VQA video: decode_format80 problem: next op would overflow dest_index\n"); \
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av_log(NULL, AV_LOG_ERROR, " VQA video: current src_pos = %d, count = %d, dest_size = %d\n", \
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src_pos, count, dest_size); \
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return AVERROR_INVALIDDATA; \
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}
|
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|
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|
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static int decode_format80(GetByteContext *gb, int src_size,
|
2003-10-04 17:47:22 +00:00
|
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unsigned char *dest, int dest_size, int check_size) {
|
2003-10-02 05:20:07 +00:00
|
|
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|
|
|
|
int dest_index = 0;
|
2012-03-16 00:56:41 +00:00
|
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int count, opcode, start;
|
2003-10-02 05:20:07 +00:00
|
|
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int src_pos;
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|
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unsigned char color;
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|
|
int i;
|
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
start = bytestream2_tell(gb);
|
|
|
|
while (bytestream2_tell(gb) - start < src_size) {
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|
|
|
opcode = bytestream2_get_byte(gb);
|
|
|
|
av_dlog(NULL, " opcode %02X: ", opcode);
|
2003-10-02 05:20:07 +00:00
|
|
|
|
|
|
|
/* 0x80 means that frame is finished */
|
2012-03-16 00:56:41 +00:00
|
|
|
if (opcode == 0x80)
|
|
|
|
return 0;
|
2003-10-02 05:20:07 +00:00
|
|
|
|
|
|
|
if (dest_index >= dest_size) {
|
2003-11-03 13:26:22 +00:00
|
|
|
av_log(NULL, AV_LOG_ERROR, " VQA video: decode_format80 problem: dest_index (%d) exceeded dest_size (%d)\n",
|
2003-10-02 05:20:07 +00:00
|
|
|
dest_index, dest_size);
|
2012-03-16 00:56:41 +00:00
|
|
|
return AVERROR_INVALIDDATA;
|
2003-10-02 05:20:07 +00:00
|
|
|
}
|
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
if (opcode == 0xFF) {
|
2003-10-02 05:20:07 +00:00
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
count = bytestream2_get_le16(gb);
|
|
|
|
src_pos = bytestream2_get_le16(gb);
|
2011-06-02 20:49:53 +00:00
|
|
|
av_dlog(NULL, "(1) copy %X bytes from absolute pos %X\n", count, src_pos);
|
2003-10-02 05:20:07 +00:00
|
|
|
CHECK_COUNT();
|
2012-03-16 00:56:41 +00:00
|
|
|
CHECK_COPY(src_pos);
|
2003-10-02 05:20:07 +00:00
|
|
|
for (i = 0; i < count; i++)
|
|
|
|
dest[dest_index + i] = dest[src_pos + i];
|
|
|
|
dest_index += count;
|
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
} else if (opcode == 0xFE) {
|
2003-10-02 05:20:07 +00:00
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
count = bytestream2_get_le16(gb);
|
|
|
|
color = bytestream2_get_byte(gb);
|
2011-06-02 20:49:53 +00:00
|
|
|
av_dlog(NULL, "(2) set %X bytes to %02X\n", count, color);
|
2003-10-02 05:20:07 +00:00
|
|
|
CHECK_COUNT();
|
|
|
|
memset(&dest[dest_index], color, count);
|
|
|
|
dest_index += count;
|
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
} else if ((opcode & 0xC0) == 0xC0) {
|
2003-10-02 05:20:07 +00:00
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
count = (opcode & 0x3F) + 3;
|
|
|
|
src_pos = bytestream2_get_le16(gb);
|
2011-06-02 20:49:53 +00:00
|
|
|
av_dlog(NULL, "(3) copy %X bytes from absolute pos %X\n", count, src_pos);
|
2003-10-02 05:20:07 +00:00
|
|
|
CHECK_COUNT();
|
2012-03-16 00:56:41 +00:00
|
|
|
CHECK_COPY(src_pos);
|
2003-10-02 05:20:07 +00:00
|
|
|
for (i = 0; i < count; i++)
|
|
|
|
dest[dest_index + i] = dest[src_pos + i];
|
|
|
|
dest_index += count;
|
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
} else if (opcode > 0x80) {
|
2003-10-02 05:20:07 +00:00
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
count = opcode & 0x3F;
|
2011-06-02 20:49:53 +00:00
|
|
|
av_dlog(NULL, "(4) copy %X bytes from source to dest\n", count);
|
2003-10-02 05:20:07 +00:00
|
|
|
CHECK_COUNT();
|
2012-03-16 00:56:41 +00:00
|
|
|
bytestream2_get_buffer(gb, &dest[dest_index], count);
|
2003-10-02 05:20:07 +00:00
|
|
|
dest_index += count;
|
|
|
|
|
|
|
|
} else {
|
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
count = ((opcode & 0x70) >> 4) + 3;
|
|
|
|
src_pos = bytestream2_get_byte(gb) | ((opcode & 0x0F) << 8);
|
2011-06-02 20:49:53 +00:00
|
|
|
av_dlog(NULL, "(5) copy %X bytes from relpos %X\n", count, src_pos);
|
2003-10-02 05:20:07 +00:00
|
|
|
CHECK_COUNT();
|
2012-03-16 00:56:41 +00:00
|
|
|
CHECK_COPY(dest_index - src_pos);
|
2003-10-02 05:20:07 +00:00
|
|
|
for (i = 0; i < count; i++)
|
|
|
|
dest[dest_index + i] = dest[dest_index - src_pos + i];
|
|
|
|
dest_index += count;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2003-10-04 17:47:22 +00:00
|
|
|
/* validate that the entire destination buffer was filled; this is
|
|
|
|
* important for decoding frame maps since each vector needs to have a
|
|
|
|
* codebook entry; it is not important for compressed codebooks because
|
|
|
|
* not every entry needs to be filled */
|
|
|
|
if (check_size)
|
|
|
|
if (dest_index < dest_size)
|
2003-11-03 13:26:22 +00:00
|
|
|
av_log(NULL, AV_LOG_ERROR, " VQA video: decode_format80 problem: decode finished with dest_index (%d) < dest_size (%d)\n",
|
2003-10-04 17:47:22 +00:00
|
|
|
dest_index, dest_size);
|
2012-03-16 00:56:41 +00:00
|
|
|
|
|
|
|
return 0; // let's display what we decoded anyway
|
2003-10-02 05:20:07 +00:00
|
|
|
}
|
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
static int vqa_decode_chunk(VqaContext *s)
|
2003-10-02 05:20:07 +00:00
|
|
|
{
|
|
|
|
unsigned int chunk_type;
|
|
|
|
unsigned int chunk_size;
|
|
|
|
int byte_skip;
|
|
|
|
unsigned int index = 0;
|
|
|
|
int i;
|
|
|
|
unsigned char r, g, b;
|
2003-10-11 01:11:29 +00:00
|
|
|
int index_shift;
|
2012-03-16 00:56:41 +00:00
|
|
|
int res;
|
2003-10-02 05:20:07 +00:00
|
|
|
|
|
|
|
int cbf0_chunk = -1;
|
|
|
|
int cbfz_chunk = -1;
|
|
|
|
int cbp0_chunk = -1;
|
|
|
|
int cbpz_chunk = -1;
|
|
|
|
int cpl0_chunk = -1;
|
|
|
|
int cplz_chunk = -1;
|
|
|
|
int vptz_chunk = -1;
|
|
|
|
|
|
|
|
int x, y;
|
|
|
|
int lines = 0;
|
|
|
|
int pixel_ptr;
|
|
|
|
int vector_index = 0;
|
|
|
|
int lobyte = 0;
|
|
|
|
int hibyte = 0;
|
|
|
|
int lobytes = 0;
|
|
|
|
int hibytes = s->decode_buffer_size / 2;
|
|
|
|
|
|
|
|
/* first, traverse through the frame and find the subchunks */
|
2012-03-16 00:56:41 +00:00
|
|
|
while (bytestream2_get_bytes_left(&s->gb) >= 8) {
|
2003-10-02 05:20:07 +00:00
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
chunk_type = bytestream2_get_be32u(&s->gb);
|
|
|
|
index = bytestream2_tell(&s->gb);
|
|
|
|
chunk_size = bytestream2_get_be32u(&s->gb);
|
2003-10-02 05:20:07 +00:00
|
|
|
|
|
|
|
switch (chunk_type) {
|
|
|
|
|
|
|
|
case CBF0_TAG:
|
|
|
|
cbf0_chunk = index;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case CBFZ_TAG:
|
|
|
|
cbfz_chunk = index;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case CBP0_TAG:
|
|
|
|
cbp0_chunk = index;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case CBPZ_TAG:
|
|
|
|
cbpz_chunk = index;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case CPL0_TAG:
|
|
|
|
cpl0_chunk = index;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case CPLZ_TAG:
|
|
|
|
cplz_chunk = index;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case VPTZ_TAG:
|
|
|
|
vptz_chunk = index;
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
2003-11-03 13:26:22 +00:00
|
|
|
av_log(s->avctx, AV_LOG_ERROR, " VQA video: Found unknown chunk type: %c%c%c%c (%08X)\n",
|
2003-10-02 05:20:07 +00:00
|
|
|
(chunk_type >> 24) & 0xFF,
|
|
|
|
(chunk_type >> 16) & 0xFF,
|
|
|
|
(chunk_type >> 8) & 0xFF,
|
|
|
|
(chunk_type >> 0) & 0xFF,
|
|
|
|
chunk_type);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
byte_skip = chunk_size & 0x01;
|
2012-03-16 00:56:41 +00:00
|
|
|
bytestream2_skip(&s->gb, chunk_size + byte_skip);
|
2003-10-02 05:20:07 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* next, deal with the palette */
|
|
|
|
if ((cpl0_chunk != -1) && (cplz_chunk != -1)) {
|
|
|
|
|
|
|
|
/* a chunk should not have both chunk types */
|
2003-11-03 13:26:22 +00:00
|
|
|
av_log(s->avctx, AV_LOG_ERROR, " VQA video: problem: found both CPL0 and CPLZ chunks\n");
|
2012-03-16 00:56:41 +00:00
|
|
|
return AVERROR_INVALIDDATA;
|
2003-10-02 05:20:07 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* decompress the palette chunk */
|
|
|
|
if (cplz_chunk != -1) {
|
|
|
|
|
|
|
|
/* yet to be handled */
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
/* convert the RGB palette into the machine's endian format */
|
|
|
|
if (cpl0_chunk != -1) {
|
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
bytestream2_seek(&s->gb, cpl0_chunk, SEEK_SET);
|
|
|
|
chunk_size = bytestream2_get_be32(&s->gb);
|
2003-10-02 05:20:07 +00:00
|
|
|
/* sanity check the palette size */
|
2012-03-21 22:19:31 +00:00
|
|
|
if (chunk_size / 3 > 256 || chunk_size > bytestream2_get_bytes_left(&s->gb)) {
|
2003-11-03 13:26:22 +00:00
|
|
|
av_log(s->avctx, AV_LOG_ERROR, " VQA video: problem: found a palette chunk with %d colors\n",
|
2003-10-02 05:20:07 +00:00
|
|
|
chunk_size / 3);
|
2012-03-16 00:56:41 +00:00
|
|
|
return AVERROR_INVALIDDATA;
|
2003-10-02 05:20:07 +00:00
|
|
|
}
|
|
|
|
for (i = 0; i < chunk_size / 3; i++) {
|
|
|
|
/* scale by 4 to transform 6-bit palette -> 8-bit */
|
2012-03-16 00:56:41 +00:00
|
|
|
r = bytestream2_get_byteu(&s->gb) * 4;
|
|
|
|
g = bytestream2_get_byteu(&s->gb) * 4;
|
|
|
|
b = bytestream2_get_byteu(&s->gb) * 4;
|
2003-10-30 05:40:58 +00:00
|
|
|
s->palette[i] = (r << 16) | (g << 8) | (b);
|
2003-10-02 05:20:07 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* next, look for a full codebook */
|
|
|
|
if ((cbf0_chunk != -1) && (cbfz_chunk != -1)) {
|
|
|
|
|
|
|
|
/* a chunk should not have both chunk types */
|
2003-11-03 13:26:22 +00:00
|
|
|
av_log(s->avctx, AV_LOG_ERROR, " VQA video: problem: found both CBF0 and CBFZ chunks\n");
|
2012-03-16 00:56:41 +00:00
|
|
|
return AVERROR_INVALIDDATA;
|
2003-10-02 05:20:07 +00:00
|
|
|
}
|
|
|
|
|
2003-10-04 17:47:22 +00:00
|
|
|
/* decompress the full codebook chunk */
|
2003-10-02 05:20:07 +00:00
|
|
|
if (cbfz_chunk != -1) {
|
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
bytestream2_seek(&s->gb, cbfz_chunk, SEEK_SET);
|
|
|
|
chunk_size = bytestream2_get_be32(&s->gb);
|
|
|
|
if ((res = decode_format80(&s->gb, chunk_size, s->codebook,
|
|
|
|
s->codebook_size, 0)) < 0)
|
|
|
|
return res;
|
2003-10-02 05:20:07 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* copy a full codebook */
|
|
|
|
if (cbf0_chunk != -1) {
|
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
bytestream2_seek(&s->gb, cbf0_chunk, SEEK_SET);
|
|
|
|
chunk_size = bytestream2_get_be32(&s->gb);
|
2003-10-02 05:20:07 +00:00
|
|
|
/* sanity check the full codebook size */
|
2003-10-04 17:47:22 +00:00
|
|
|
if (chunk_size > MAX_CODEBOOK_SIZE) {
|
2003-11-03 13:26:22 +00:00
|
|
|
av_log(s->avctx, AV_LOG_ERROR, " VQA video: problem: CBF0 chunk too large (0x%X bytes)\n",
|
2003-10-04 17:47:22 +00:00
|
|
|
chunk_size);
|
2012-03-16 00:56:41 +00:00
|
|
|
return AVERROR_INVALIDDATA;
|
2003-10-02 05:20:07 +00:00
|
|
|
}
|
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
bytestream2_get_buffer(&s->gb, s->codebook, chunk_size);
|
2003-10-02 05:20:07 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* decode the frame */
|
|
|
|
if (vptz_chunk == -1) {
|
|
|
|
|
|
|
|
/* something is wrong if there is no VPTZ chunk */
|
2003-11-03 13:26:22 +00:00
|
|
|
av_log(s->avctx, AV_LOG_ERROR, " VQA video: problem: no VPTZ chunk found\n");
|
2012-03-16 00:56:41 +00:00
|
|
|
return AVERROR_INVALIDDATA;
|
2003-10-02 05:20:07 +00:00
|
|
|
}
|
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
bytestream2_seek(&s->gb, vptz_chunk, SEEK_SET);
|
|
|
|
chunk_size = bytestream2_get_be32(&s->gb);
|
|
|
|
if ((res = decode_format80(&s->gb, chunk_size,
|
|
|
|
s->decode_buffer, s->decode_buffer_size, 1)) < 0)
|
|
|
|
return res;
|
2003-10-02 05:20:07 +00:00
|
|
|
|
|
|
|
/* render the final PAL8 frame */
|
2003-10-11 01:11:29 +00:00
|
|
|
if (s->vector_height == 4)
|
|
|
|
index_shift = 4;
|
|
|
|
else
|
|
|
|
index_shift = 3;
|
2005-12-17 18:14:38 +00:00
|
|
|
for (y = 0; y < s->frame.linesize[0] * s->height;
|
2003-10-02 05:20:07 +00:00
|
|
|
y += s->frame.linesize[0] * s->vector_height) {
|
|
|
|
|
|
|
|
for (x = y; x < y + s->width; x += 4, lobytes++, hibytes++) {
|
|
|
|
pixel_ptr = x;
|
|
|
|
|
|
|
|
/* get the vector index, the method for which varies according to
|
|
|
|
* VQA file version */
|
|
|
|
switch (s->vqa_version) {
|
|
|
|
|
|
|
|
case 1:
|
2006-11-29 05:40:37 +00:00
|
|
|
lobyte = s->decode_buffer[lobytes * 2];
|
|
|
|
hibyte = s->decode_buffer[(lobytes * 2) + 1];
|
|
|
|
vector_index = ((hibyte << 8) | lobyte) >> 3;
|
|
|
|
vector_index <<= index_shift;
|
|
|
|
lines = s->vector_height;
|
|
|
|
/* uniform color fill - a quick hack */
|
|
|
|
if (hibyte == 0xFF) {
|
|
|
|
while (lines--) {
|
|
|
|
s->frame.data[0][pixel_ptr + 0] = 255 - lobyte;
|
|
|
|
s->frame.data[0][pixel_ptr + 1] = 255 - lobyte;
|
|
|
|
s->frame.data[0][pixel_ptr + 2] = 255 - lobyte;
|
|
|
|
s->frame.data[0][pixel_ptr + 3] = 255 - lobyte;
|
|
|
|
pixel_ptr += s->frame.linesize[0];
|
|
|
|
}
|
|
|
|
lines=0;
|
|
|
|
}
|
2003-10-02 05:20:07 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case 2:
|
|
|
|
lobyte = s->decode_buffer[lobytes];
|
|
|
|
hibyte = s->decode_buffer[hibytes];
|
|
|
|
vector_index = (hibyte << 8) | lobyte;
|
2003-10-11 01:11:29 +00:00
|
|
|
vector_index <<= index_shift;
|
2003-10-04 17:47:22 +00:00
|
|
|
lines = s->vector_height;
|
2003-10-02 05:20:07 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case 3:
|
|
|
|
/* not implemented yet */
|
|
|
|
lines = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
while (lines--) {
|
|
|
|
s->frame.data[0][pixel_ptr + 0] = s->codebook[vector_index++];
|
|
|
|
s->frame.data[0][pixel_ptr + 1] = s->codebook[vector_index++];
|
|
|
|
s->frame.data[0][pixel_ptr + 2] = s->codebook[vector_index++];
|
|
|
|
s->frame.data[0][pixel_ptr + 3] = s->codebook[vector_index++];
|
|
|
|
pixel_ptr += s->frame.linesize[0];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* handle partial codebook */
|
|
|
|
if ((cbp0_chunk != -1) && (cbpz_chunk != -1)) {
|
|
|
|
/* a chunk should not have both chunk types */
|
2003-11-03 13:26:22 +00:00
|
|
|
av_log(s->avctx, AV_LOG_ERROR, " VQA video: problem: found both CBP0 and CBPZ chunks\n");
|
2012-03-16 00:56:41 +00:00
|
|
|
return AVERROR_INVALIDDATA;
|
2003-10-02 05:20:07 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (cbp0_chunk != -1) {
|
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
bytestream2_seek(&s->gb, cbp0_chunk, SEEK_SET);
|
|
|
|
chunk_size = bytestream2_get_be32(&s->gb);
|
2003-10-02 05:20:07 +00:00
|
|
|
|
|
|
|
/* accumulate partial codebook */
|
2012-03-16 00:56:41 +00:00
|
|
|
bytestream2_get_buffer(&s->gb, &s->next_codebook_buffer[s->next_codebook_buffer_index],
|
|
|
|
chunk_size);
|
2003-10-02 05:20:07 +00:00
|
|
|
s->next_codebook_buffer_index += chunk_size;
|
|
|
|
|
|
|
|
s->partial_countdown--;
|
|
|
|
if (s->partial_countdown == 0) {
|
|
|
|
|
|
|
|
/* time to replace codebook */
|
2005-12-17 18:14:38 +00:00
|
|
|
memcpy(s->codebook, s->next_codebook_buffer,
|
2003-10-02 05:20:07 +00:00
|
|
|
s->next_codebook_buffer_index);
|
|
|
|
|
|
|
|
/* reset accounting */
|
|
|
|
s->next_codebook_buffer_index = 0;
|
|
|
|
s->partial_countdown = s->partial_count;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (cbpz_chunk != -1) {
|
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
bytestream2_seek(&s->gb, cbpz_chunk, SEEK_SET);
|
|
|
|
chunk_size = bytestream2_get_be32(&s->gb);
|
2003-10-02 05:20:07 +00:00
|
|
|
|
2003-10-04 17:47:22 +00:00
|
|
|
/* accumulate partial codebook */
|
2012-03-16 00:56:41 +00:00
|
|
|
bytestream2_get_buffer(&s->gb, &s->next_codebook_buffer[s->next_codebook_buffer_index],
|
|
|
|
chunk_size);
|
2003-10-04 17:47:22 +00:00
|
|
|
s->next_codebook_buffer_index += chunk_size;
|
|
|
|
|
|
|
|
s->partial_countdown--;
|
|
|
|
if (s->partial_countdown == 0) {
|
2012-03-16 00:56:41 +00:00
|
|
|
GetByteContext gb;
|
2003-10-04 17:47:22 +00:00
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
bytestream2_init(&gb, s->next_codebook_buffer, s->next_codebook_buffer_index);
|
2003-10-04 17:47:22 +00:00
|
|
|
/* decompress codebook */
|
2012-03-16 00:56:41 +00:00
|
|
|
if ((res = decode_format80(&gb, s->next_codebook_buffer_index,
|
|
|
|
s->codebook, s->codebook_size, 0)) < 0)
|
|
|
|
return res;
|
2003-10-04 17:47:22 +00:00
|
|
|
|
|
|
|
/* reset accounting */
|
|
|
|
s->next_codebook_buffer_index = 0;
|
|
|
|
s->partial_countdown = s->partial_count;
|
|
|
|
}
|
2003-10-02 05:20:07 +00:00
|
|
|
}
|
2012-03-16 00:56:41 +00:00
|
|
|
|
|
|
|
return 0;
|
2003-10-02 05:20:07 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int vqa_decode_frame(AVCodecContext *avctx,
|
|
|
|
void *data, int *data_size,
|
2009-04-07 15:59:50 +00:00
|
|
|
AVPacket *avpkt)
|
2003-10-02 05:20:07 +00:00
|
|
|
{
|
2007-04-08 20:24:16 +00:00
|
|
|
VqaContext *s = avctx->priv_data;
|
2012-03-16 00:56:41 +00:00
|
|
|
int res;
|
2003-10-02 05:20:07 +00:00
|
|
|
|
|
|
|
if (s->frame.data[0])
|
|
|
|
avctx->release_buffer(avctx, &s->frame);
|
|
|
|
|
|
|
|
if (avctx->get_buffer(avctx, &s->frame)) {
|
2003-11-03 13:26:22 +00:00
|
|
|
av_log(s->avctx, AV_LOG_ERROR, " VQA Video: get_buffer() failed\n");
|
2003-10-02 05:20:07 +00:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2012-03-16 00:56:41 +00:00
|
|
|
bytestream2_init(&s->gb, avpkt->data, avpkt->size);
|
|
|
|
if ((res = vqa_decode_chunk(s)) < 0)
|
|
|
|
return res;
|
2003-10-02 05:20:07 +00:00
|
|
|
|
|
|
|
/* make the palette available on the way out */
|
|
|
|
memcpy(s->frame.data[1], s->palette, PALETTE_COUNT * 4);
|
2003-10-30 05:40:58 +00:00
|
|
|
s->frame.palette_has_changed = 1;
|
2003-10-02 05:20:07 +00:00
|
|
|
|
|
|
|
*data_size = sizeof(AVFrame);
|
|
|
|
*(AVFrame*)data = s->frame;
|
|
|
|
|
|
|
|
/* report that the buffer was completely consumed */
|
2012-03-16 00:56:41 +00:00
|
|
|
return avpkt->size;
|
2003-10-02 05:20:07 +00:00
|
|
|
}
|
|
|
|
|
2008-03-21 03:11:20 +00:00
|
|
|
static av_cold int vqa_decode_end(AVCodecContext *avctx)
|
2003-10-02 05:20:07 +00:00
|
|
|
{
|
2007-04-08 20:24:16 +00:00
|
|
|
VqaContext *s = avctx->priv_data;
|
2003-10-02 05:20:07 +00:00
|
|
|
|
2012-03-16 13:23:57 +00:00
|
|
|
av_freep(&s->codebook);
|
|
|
|
av_freep(&s->next_codebook_buffer);
|
|
|
|
av_freep(&s->decode_buffer);
|
2003-10-02 05:20:07 +00:00
|
|
|
|
|
|
|
if (s->frame.data[0])
|
|
|
|
avctx->release_buffer(avctx, &s->frame);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-01-25 21:40:11 +00:00
|
|
|
AVCodec ff_vqa_decoder = {
|
2011-07-17 10:54:31 +00:00
|
|
|
.name = "vqavideo",
|
|
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
|
|
.id = CODEC_ID_WS_VQA,
|
|
|
|
.priv_data_size = sizeof(VqaContext),
|
|
|
|
.init = vqa_decode_init,
|
|
|
|
.close = vqa_decode_end,
|
|
|
|
.decode = vqa_decode_frame,
|
|
|
|
.capabilities = CODEC_CAP_DR1,
|
2012-04-06 16:19:39 +00:00
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("Westwood Studios VQA (Vector Quantized Animation) video"),
|
2003-10-02 05:20:07 +00:00
|
|
|
};
|