3 * Copyright (C) 2005 the ffmpeg project
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * @file libavcodec/aasc.c
24 * Autodesk RLE Video Decoder by Konstantin Shishkov
35 typedef struct AascContext
{
36 AVCodecContext
*avctx
;
40 #define FETCH_NEXT_STREAM_BYTE() \
41 if (stream_ptr >= buf_size) \
43 av_log(s->avctx, AV_LOG_ERROR, " AASC: stream ptr just went out of bounds (fetch)\n"); \
46 stream_byte = buf[stream_ptr++];
48 static av_cold
int aasc_decode_init(AVCodecContext
*avctx
)
50 AascContext
*s
= avctx
->priv_data
;
54 avctx
->pix_fmt
= PIX_FMT_BGR24
;
55 s
->frame
.data
[0] = NULL
;
60 static int aasc_decode_frame(AVCodecContext
*avctx
,
61 void *data
, int *data_size
,
62 const uint8_t *buf
, int buf_size
)
64 AascContext
*s
= avctx
->priv_data
;
67 s
->frame
.reference
= 1;
68 s
->frame
.buffer_hints
= FF_BUFFER_HINTS_VALID
| FF_BUFFER_HINTS_PRESERVE
| FF_BUFFER_HINTS_REUSABLE
;
69 if (avctx
->reget_buffer(avctx
, &s
->frame
)) {
70 av_log(avctx
, AV_LOG_ERROR
, "reget_buffer() failed\n");
79 stride
= (avctx
->width
* 3 + 3) & ~3;
80 for(i
= avctx
->height
- 1; i
>= 0; i
--){
81 memcpy(s
->frame
.data
[0] + i
*s
->frame
.linesize
[0], buf
, avctx
->width
*3);
86 ff_msrle_decode(avctx
, (AVPicture
*)&s
->frame
, 8, buf
- 4, buf_size
+ 4);
89 av_log(avctx
, AV_LOG_ERROR
, "Unknown compression type %d\n", compr
);
93 *data_size
= sizeof(AVFrame
);
94 *(AVFrame
*)data
= s
->frame
;
96 /* report that the buffer was completely consumed */
100 static av_cold
int aasc_decode_end(AVCodecContext
*avctx
)
102 AascContext
*s
= avctx
->priv_data
;
104 /* release the last frame */
105 if (s
->frame
.data
[0])
106 avctx
->release_buffer(avctx
, &s
->frame
);
111 AVCodec aasc_decoder
= {
121 .long_name
= NULL_IF_CONFIG_SMALL("Autodesk RLE"),