mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-29 10:52:20 +00:00
6ce9b4310c
av_check_image_size() instead. Originally committed as revision 24711 to svn://svn.ffmpeg.org/ffmpeg/trunk
200 lines
5.4 KiB
C
200 lines
5.4 KiB
C
/*
|
|
* Sun Rasterfile (.sun/.ras/im{1,8,24}/.sunras) image decoder
|
|
* Copyright (c) 2007, 2008 Ivo van Poorten
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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.
|
|
*
|
|
* FFmpeg 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 FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "libavcore/imgutils.h"
|
|
#include "avcodec.h"
|
|
|
|
#define RT_OLD 0
|
|
#define RT_STANDARD 1
|
|
#define RT_BYTE_ENCODED 2
|
|
#define RT_FORMAT_RGB 3
|
|
#define RT_FORMAT_TIFF 4
|
|
#define RT_FORMAT_IFF 5
|
|
|
|
typedef struct SUNRASTContext {
|
|
AVFrame picture;
|
|
} SUNRASTContext;
|
|
|
|
static av_cold int sunrast_init(AVCodecContext *avctx) {
|
|
SUNRASTContext *s = avctx->priv_data;
|
|
|
|
avcodec_get_frame_defaults(&s->picture);
|
|
avctx->coded_frame= &s->picture;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sunrast_decode_frame(AVCodecContext *avctx, void *data,
|
|
int *data_size, AVPacket *avpkt) {
|
|
const uint8_t *buf = avpkt->data;
|
|
SUNRASTContext * const s = avctx->priv_data;
|
|
AVFrame *picture = data;
|
|
AVFrame * const p = &s->picture;
|
|
unsigned int w, h, depth, type, maptype, maplength, stride, x, y, len, alen;
|
|
uint8_t *ptr;
|
|
const uint8_t *bufstart = buf;
|
|
|
|
if (AV_RB32(buf) != 0x59a66a95) {
|
|
av_log(avctx, AV_LOG_ERROR, "this is not sunras encoded data\n");
|
|
return -1;
|
|
}
|
|
|
|
w = AV_RB32(buf+4);
|
|
h = AV_RB32(buf+8);
|
|
depth = AV_RB32(buf+12);
|
|
type = AV_RB32(buf+20);
|
|
maptype = AV_RB32(buf+24);
|
|
maplength = AV_RB32(buf+28);
|
|
|
|
if (type == RT_FORMAT_TIFF || type == RT_FORMAT_IFF) {
|
|
av_log(avctx, AV_LOG_ERROR, "unsupported (compression) type\n");
|
|
return -1;
|
|
}
|
|
if (type > RT_FORMAT_IFF) {
|
|
av_log(avctx, AV_LOG_ERROR, "invalid (compression) type\n");
|
|
return -1;
|
|
}
|
|
if (maptype & ~1) {
|
|
av_log(avctx, AV_LOG_ERROR, "invalid colormap type\n");
|
|
return -1;
|
|
}
|
|
|
|
buf += 32;
|
|
|
|
switch (depth) {
|
|
case 1:
|
|
avctx->pix_fmt = PIX_FMT_MONOWHITE;
|
|
break;
|
|
case 8:
|
|
avctx->pix_fmt = PIX_FMT_PAL8;
|
|
break;
|
|
case 24:
|
|
avctx->pix_fmt = (type == RT_FORMAT_RGB) ? PIX_FMT_RGB24 : PIX_FMT_BGR24;
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "invalid depth\n");
|
|
return -1;
|
|
}
|
|
|
|
if (p->data[0])
|
|
avctx->release_buffer(avctx, p);
|
|
|
|
if (av_check_image_size(w, h, 0, avctx))
|
|
return -1;
|
|
if (w != avctx->width || h != avctx->height)
|
|
avcodec_set_dimensions(avctx, w, h);
|
|
if (avctx->get_buffer(avctx, p) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
|
return -1;
|
|
}
|
|
|
|
p->pict_type = FF_I_TYPE;
|
|
|
|
if (depth != 8 && maplength) {
|
|
av_log(avctx, AV_LOG_WARNING, "useless colormap found or file is corrupted, trying to recover\n");
|
|
|
|
} else if (depth == 8) {
|
|
unsigned int len = maplength / 3;
|
|
|
|
if (!maplength) {
|
|
av_log(avctx, AV_LOG_ERROR, "colormap expected\n");
|
|
return -1;
|
|
}
|
|
if (maplength % 3 || maplength > 768) {
|
|
av_log(avctx, AV_LOG_WARNING, "invalid colormap length\n");
|
|
return -1;
|
|
}
|
|
|
|
ptr = p->data[1];
|
|
for (x=0; x<len; x++, ptr+=4)
|
|
*(uint32_t *)ptr = (buf[x]<<16) + (buf[len+x]<<8) + buf[len+len+x];
|
|
}
|
|
|
|
buf += maplength;
|
|
|
|
ptr = p->data[0];
|
|
stride = p->linesize[0];
|
|
|
|
/* scanlines are aligned on 16 bit boundaries */
|
|
len = (depth * w + 7) >> 3;
|
|
alen = len + (len&1);
|
|
|
|
if (type == RT_BYTE_ENCODED) {
|
|
int value, run;
|
|
uint8_t *end = ptr + h*stride;
|
|
|
|
x = 0;
|
|
while (ptr != end) {
|
|
run = 1;
|
|
if ((value = *buf++) == 0x80) {
|
|
run = *buf++ + 1;
|
|
if (run != 1)
|
|
value = *buf++;
|
|
}
|
|
while (run--) {
|
|
if (x < len)
|
|
ptr[x] = value;
|
|
if (++x >= alen) {
|
|
x = 0;
|
|
ptr += stride;
|
|
if (ptr == end)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
for (y=0; y<h; y++) {
|
|
memcpy(ptr, buf, len);
|
|
ptr += stride;
|
|
buf += alen;
|
|
}
|
|
}
|
|
|
|
*picture = s->picture;
|
|
*data_size = sizeof(AVFrame);
|
|
|
|
return buf - bufstart;
|
|
}
|
|
|
|
static av_cold int sunrast_end(AVCodecContext *avctx) {
|
|
SUNRASTContext *s = avctx->priv_data;
|
|
|
|
if(s->picture.data[0])
|
|
avctx->release_buffer(avctx, &s->picture);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec sunrast_decoder = {
|
|
"sunrast",
|
|
AVMEDIA_TYPE_VIDEO,
|
|
CODEC_ID_SUNRAST,
|
|
sizeof(SUNRASTContext),
|
|
sunrast_init,
|
|
NULL,
|
|
sunrast_end,
|
|
sunrast_decode_frame,
|
|
CODEC_CAP_DR1,
|
|
NULL,
|
|
.long_name = NULL_IF_CONFIG_SMALL("Sun Rasterfile image"),
|
|
};
|