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/*
* QuickDraw (qdrw) codec
* Copyright (c) 2004 Konstantin Shishkov
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Apple QuickDraw codec.
*/
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "internal.h"
static int decode_frame(AVCodecContext *avctx,
void *data, int *got_frame,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
const uint8_t *buf_end = avpkt->data + avpkt->size;
int buf_size = avpkt->size;
AVFrame * const p = data;
uint8_t* outdata;
int colors;
int i, ret;
uint32_t *pal;
int r, g, b;
if ((ret = ff_get_buffer(avctx, p, 0)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;
outdata = p->data[0];
if (buf_end - buf < 0x68 + 4)
return AVERROR_INVALIDDATA;
buf += 0x68; /* jump to palette */
colors = AV_RB32(buf);
buf += 4;
if (colors < 0 || colors > 256) {
av_log(avctx, AV_LOG_ERROR, "Error color count - %i(0x%X)\n", colors, colors);
return AVERROR_INVALIDDATA;
}
if (buf_end - buf < (colors + 1) * 8)
return AVERROR_INVALIDDATA;
pal = (uint32_t*)p->data[1];
for (i = 0; i <= colors; i++) {
unsigned int idx;
idx = AV_RB16(buf); /* color index */
buf += 2;
if (idx > 255) {
av_log(avctx, AV_LOG_ERROR, "Palette index out of range: %u\n", idx);
buf += 6;
continue;
}
r = *buf++;
buf++;
g = *buf++;
buf++;
b = *buf++;
buf++;
pal[idx] = (r << 16) | (g << 8) | b;
}
p->palette_has_changed = 1;
if (buf_end - buf < 18)
return AVERROR_INVALIDDATA;
buf += 18; /* skip unneeded data */
for (i = 0; i < avctx->height; i++) {
int size, left, code, pix;
const uint8_t *next;
uint8_t *out;
int tsize = 0;
/* decode line */
out = outdata;
size = AV_RB16(buf); /* size of packed line */
buf += 2;
if (buf_end - buf < size)
return AVERROR_INVALIDDATA;
left = size;
next = buf + size;
while (left > 0) {
code = *buf++;
if (code & 0x80 ) { /* run */
pix = *buf++;
if ((out + (257 - code)) > (outdata + p->linesize[0]))
break;
memset(out, pix, 257 - code);
out += 257 - code;
tsize += 257 - code;
left -= 2;
} else { /* copy */
if ((out + code) > (outdata + p->linesize[0]))
break;
if (buf_end - buf < code + 1)
return AVERROR_INVALIDDATA;
memcpy(out, buf, code + 1);
out += code + 1;
buf += code + 1;
left -= 2 + code;
tsize += code + 1;
}
}
buf = next;
outdata += p->linesize[0];
}
*got_frame = 1;
return buf_size;
}
static av_cold int decode_init(AVCodecContext *avctx)
{
avctx->pix_fmt= AV_PIX_FMT_PAL8;
return 0;
}
AVCodec ff_qdraw_decoder = {
.name = "qdraw",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_QDRAW,
.init = decode_init,
.decode = decode_frame,
.capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("Apple QuickDraw"),
};
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