589f8220 |
/* |
a9f1d8cd |
* Autodesk RLE Decoder |
41ed7ab4 |
* Copyright (C) 2005 The FFmpeg project |
589f8220 |
* |
b78e7197 |
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or |
589f8220 |
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either |
b78e7197 |
* version 2.1 of the License, or (at your option) any later version. |
589f8220 |
* |
b78e7197 |
* FFmpeg is distributed in the hope that it will be useful, |
589f8220 |
* 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 |
b78e7197 |
* License along with FFmpeg; if not, write to the Free Software |
5509bffa |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
589f8220 |
*/
/** |
ba87f080 |
* @file |
a9f1d8cd |
* Autodesk RLE Video Decoder by Konstantin Shishkov |
589f8220 |
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "avcodec.h" |
759001c5 |
#include "internal.h" |
44aa9771 |
#include "msrledec.h" |
589f8220 |
typedef struct AascContext {
AVCodecContext *avctx; |
992f71e9 |
GetByteContext gb; |
759001c5 |
AVFrame *frame; |
bd971dda |
uint32_t palette[AVPALETTE_COUNT];
int palette_size; |
589f8220 |
} AascContext;
|
98a6fff9 |
static av_cold int aasc_decode_init(AVCodecContext *avctx) |
589f8220 |
{ |
e4141433 |
AascContext *s = avctx->priv_data; |
bd971dda |
uint8_t *ptr;
int i; |
589f8220 |
s->avctx = avctx; |
718b90d4 |
switch (avctx->bits_per_coded_sample) { |
bd971dda |
case 8: |
ac627b3d |
avctx->pix_fmt = AV_PIX_FMT_PAL8; |
bd971dda |
ptr = avctx->extradata;
s->palette_size = FFMIN(avctx->extradata_size, AVPALETTE_SIZE);
for (i = 0; i < s->palette_size / 4; i++) {
s->palette[i] = 0xFFU << 24 | AV_RL32(ptr);
ptr += 4;
}
break; |
718b90d4 |
case 16: |
51e9d2db |
avctx->pix_fmt = AV_PIX_FMT_RGB555LE; |
718b90d4 |
break;
case 24: |
ac627b3d |
avctx->pix_fmt = AV_PIX_FMT_BGR24; |
718b90d4 |
break;
default:
av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", avctx->bits_per_coded_sample);
return -1;
} |
589f8220 |
|
759001c5 |
s->frame = av_frame_alloc();
if (!s->frame)
return AVERROR(ENOMEM); |
589f8220 |
return 0;
}
static int aasc_decode_frame(AVCodecContext *avctx, |
df9b9567 |
void *data, int *got_frame, |
7a00bbad |
AVPacket *avpkt) |
589f8220 |
{ |
7a00bbad |
const uint8_t *buf = avpkt->data; |
c64cf2a3 |
int buf_size = avpkt->size;
AascContext *s = avctx->priv_data; |
61904467 |
int compr, i, stride, psize, ret; |
589f8220 |
|
e1631f8e |
if (buf_size < 4) {
av_log(avctx, AV_LOG_ERROR, "frame too short\n");
return AVERROR_INVALIDDATA;
}
|
1ec94b0f |
if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) |
18009e60 |
return ret; |
589f8220 |
|
c64cf2a3 |
compr = AV_RL32(buf);
buf += 4; |
56da1fd7 |
buf_size -= 4; |
8a57ca5c |
psize = avctx->bits_per_coded_sample / 8; |
4d378776 |
switch (avctx->codec_tag) {
case MKTAG('A', 'A', 'S', '4'):
bytestream2_init(&s->gb, buf - 4, buf_size + 4); |
d3cc258a |
ff_msrle_decode(avctx, s->frame, 8, &s->gb); |
4d378776 |
break;
case MKTAG('A', 'A', 'S', 'C'): |
c64cf2a3 |
switch (compr) { |
56da1fd7 |
case 0: |
8a57ca5c |
stride = (avctx->width * psize + psize) & ~psize; |
62b1e3b1 |
if (buf_size < stride * avctx->height)
return AVERROR_INVALIDDATA; |
c64cf2a3 |
for (i = avctx->height - 1; i >= 0; i--) { |
80e9e63c |
memcpy(s->frame->data[0] + i * s->frame->linesize[0], buf, avctx->width * psize); |
56da1fd7 |
buf += stride; |
be5db700 |
buf_size -= stride; |
56da1fd7 |
}
break;
case 1: |
e7117f1c |
bytestream2_init(&s->gb, buf, buf_size); |
3496cec4 |
ff_msrle_decode(avctx, s->frame, 8, &s->gb); |
56da1fd7 |
break;
default:
av_log(avctx, AV_LOG_ERROR, "Unknown compression type %d\n", compr); |
18009e60 |
return AVERROR_INVALIDDATA; |
56da1fd7 |
} |
4d378776 |
break;
default:
av_log(avctx, AV_LOG_ERROR, "Unknown FourCC: %X\n", avctx->codec_tag);
return -1;
} |
589f8220 |
|
ac627b3d |
if (avctx->pix_fmt == AV_PIX_FMT_PAL8) |
80e9e63c |
memcpy(s->frame->data[1], s->palette, s->palette_size); |
bd971dda |
|
df9b9567 |
*got_frame = 1; |
759001c5 |
if ((ret = av_frame_ref(data, s->frame)) < 0)
return ret; |
589f8220 |
/* report that the buffer was completely consumed */ |
0be54ad2 |
return avpkt->size; |
589f8220 |
}
|
98a6fff9 |
static av_cold int aasc_decode_end(AVCodecContext *avctx) |
589f8220 |
{ |
e4141433 |
AascContext *s = avctx->priv_data; |
589f8220 |
|
759001c5 |
av_frame_free(&s->frame); |
589f8220 |
return 0;
}
|
e7e2df27 |
AVCodec ff_aasc_decoder = { |
ec6402b7 |
.name = "aasc", |
b2bed932 |
.long_name = NULL_IF_CONFIG_SMALL("Autodesk RLE"), |
ec6402b7 |
.type = AVMEDIA_TYPE_VIDEO, |
36ef5369 |
.id = AV_CODEC_ID_AASC, |
ec6402b7 |
.priv_data_size = sizeof(AascContext),
.init = aasc_decode_init,
.close = aasc_decode_end,
.decode = aasc_decode_frame, |
def97856 |
.capabilities = AV_CODEC_CAP_DR1, |
91ed4e71 |
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, |
589f8220 |
}; |