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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/intreadwrite.h"
#include "avcodec.h"
typedef struct QdrawContext{
AVCodecContext *avctx;
AVFrame pic;
} QdrawContext;
static int decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
const uint8_t *buf_end = avpkt->data + avpkt->size;
int buf_size = avpkt->size;
QdrawContext * const a = avctx->priv_data;
AVFrame * const p= (AVFrame*)&a->pic;
uint8_t* outdata;
int colors;
int i;
uint32_t *pal;
int r, g, b;
if(p->data[0])
avctx->release_buffer(avctx, p);
p->reference= 0;
if(avctx->get_buffer(avctx, p) < 0){
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
p->pict_type= AV_PICTURE_TYPE_I;
p->key_frame= 1;
outdata = a->pic.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 -1;
}
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 + a->pic.linesize[0]))
break;
memset(out, pix, 257 - code);
out += 257 - code;
tsize += 257 - code;
left -= 2;
} else { /* copy */
if ((out + code) > (outdata + a->pic.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 += a->pic.linesize[0];
}
*data_size = sizeof(AVFrame);
*(AVFrame*)data = a->pic;
return buf_size;
}
static av_cold int decode_init(AVCodecContext *avctx){
// QdrawContext * const a = avctx->priv_data;
avctx->pix_fmt= PIX_FMT_PAL8;
return 0;
}
static av_cold int decode_end(AVCodecContext *avctx){
QdrawContext * const a = avctx->priv_data;
AVFrame *pic = &a->pic;
if (pic->data[0])
avctx->release_buffer(avctx, pic);
return 0;
}
AVCodec ff_qdraw_decoder = {
"qdraw",
AVMEDIA_TYPE_VIDEO,
CODEC_ID_QDRAW,
sizeof(QdrawContext),
decode_init,
NULL,
decode_end,
decode_frame,
CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("Apple QuickDraw"),
};
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