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ffmpeg/libavcodec/aasc.c
Stefano Sabatini 72415b2adb Define AVMediaType enum, and use it instead of enum CodecType, which
is deprecated and will be dropped at the next major bump.

Originally committed as revision 22735 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-03-30 23:30:55 +00:00

124 lines
3.2 KiB
C

/*
* Autodesk RLE Decoder
* Copyright (C) 2005 the ffmpeg project
*
* 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
*/
/**
* @file libavcodec/aasc.c
* Autodesk RLE Video Decoder by Konstantin Shishkov
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "avcodec.h"
#include "dsputil.h"
#include "msrledec.h"
typedef struct AascContext {
AVCodecContext *avctx;
AVFrame frame;
} AascContext;
#define FETCH_NEXT_STREAM_BYTE() \
if (stream_ptr >= buf_size) \
{ \
av_log(s->avctx, AV_LOG_ERROR, " AASC: stream ptr just went out of bounds (fetch)\n"); \
break; \
} \
stream_byte = buf[stream_ptr++];
static av_cold int aasc_decode_init(AVCodecContext *avctx)
{
AascContext *s = avctx->priv_data;
s->avctx = avctx;
avctx->pix_fmt = PIX_FMT_BGR24;
return 0;
}
static int aasc_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
AascContext *s = avctx->priv_data;
int compr, i, stride;
s->frame.reference = 1;
s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
if (avctx->reget_buffer(avctx, &s->frame)) {
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
return -1;
}
compr = AV_RL32(buf);
buf += 4;
buf_size -= 4;
switch(compr){
case 0:
stride = (avctx->width * 3 + 3) & ~3;
for(i = avctx->height - 1; i >= 0; i--){
memcpy(s->frame.data[0] + i*s->frame.linesize[0], buf, avctx->width*3);
buf += stride;
}
break;
case 1:
ff_msrle_decode(avctx, (AVPicture*)&s->frame, 8, buf - 4, buf_size + 4);
break;
default:
av_log(avctx, AV_LOG_ERROR, "Unknown compression type %d\n", compr);
return -1;
}
*data_size = sizeof(AVFrame);
*(AVFrame*)data = s->frame;
/* report that the buffer was completely consumed */
return buf_size;
}
static av_cold int aasc_decode_end(AVCodecContext *avctx)
{
AascContext *s = avctx->priv_data;
/* release the last frame */
if (s->frame.data[0])
avctx->release_buffer(avctx, &s->frame);
return 0;
}
AVCodec aasc_decoder = {
"aasc",
AVMEDIA_TYPE_VIDEO,
CODEC_ID_AASC,
sizeof(AascContext),
aasc_decode_init,
NULL,
aasc_decode_end,
aasc_decode_frame,
CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("Autodesk RLE"),
};