/*
- * Indel Indeo 2 codec
+ * Intel Indeo 2 codec
* Copyright (c) 2005 Konstantin Shishkov
*
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file indeo2.c
+ * @file
* Intel Indeo 2 decoder.
*/
-#define ALT_BITSTREAM_READER_LE
+#define BITSTREAM_READER_LE
#include "avcodec.h"
-#include "bitstream.h"
+#include "get_bits.h"
#include "indeo2data.h"
+#include "libavutil/common.h"
typedef struct Ir2Context{
AVCodecContext *avctx;
}
} else { /* add two deltas from table */
t = dst[out - stride] + (table[c * 2] - 128);
- t= clip_uint8(t);
+ t= av_clip_uint8(t);
dst[out] = t;
out++;
t = dst[out - stride] + (table[(c * 2) + 1] - 128);
- t= clip_uint8(t);
+ t= av_clip_uint8(t);
dst[out] = t;
out++;
}
out += c * 2;
} else { /* add two deltas from table */
t = dst[out] + (((table[c * 2] - 128)*3) >> 2);
- t= clip_uint8(t);
+ t= av_clip_uint8(t);
dst[out] = t;
out++;
t = dst[out] + (((table[(c * 2) + 1] - 128)*3) >> 2);
- t= clip_uint8(t);
+ t= av_clip_uint8(t);
dst[out] = t;
out++;
}
static int ir2_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ AVPacket *avpkt)
{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
Ir2Context * const s = avctx->priv_data;
AVFrame *picture = data;
- AVFrame * const p= (AVFrame*)&s->picture;
+ AVFrame * const p = &s->picture;
int start;
if(p->data[0])
return -1;
}
+ start = 48; /* hardcoded for now */
+
+ if (start >= buf_size) {
+ av_log(s->avctx, AV_LOG_ERROR, "input buffer size too small (%d)\n", buf_size);
+ return AVERROR_INVALIDDATA;
+ }
+
s->decode_delta = buf[18];
/* decide whether frame uses deltas or not */
-#ifndef ALT_BITSTREAM_READER_LE
+#ifndef BITSTREAM_READER_LE
for (i = 0; i < buf_size; i++)
- buf[i] = ff_reverse[buf[i]];
+ buf[i] = av_reverse[buf[i]];
#endif
- start = 48; /* hardcoded for now */
- init_get_bits(&s->gb, buf + start, buf_size - start);
+ init_get_bits(&s->gb, buf + start, (buf_size - start) * 8);
if (s->decode_delta) { /* intraframe */
ir2_decode_plane(s, avctx->width, avctx->height,
s->picture.data[1], s->picture.linesize[1], ir2_luma_table);
}
- *picture= *(AVFrame*)&s->picture;
+ *picture = s->picture;
*data_size = sizeof(AVPicture);
return buf_size;
}
-static int ir2_decode_init(AVCodecContext *avctx){
+static av_cold int ir2_decode_init(AVCodecContext *avctx){
Ir2Context * const ic = avctx->priv_data;
+ static VLC_TYPE vlc_tables[1 << CODE_VLC_BITS][2];
ic->avctx = avctx;
avctx->pix_fmt= PIX_FMT_YUV410P;
- if (!ir2_vlc.table)
+ ir2_vlc.table = vlc_tables;
+ ir2_vlc.table_allocated = 1 << CODE_VLC_BITS;
+#ifdef BITSTREAM_READER_LE
init_vlc(&ir2_vlc, CODE_VLC_BITS, IR2_CODES,
&ir2_codes[0][1], 4, 2,
-#ifdef ALT_BITSTREAM_READER_LE
- &ir2_codes[0][0], 4, 2, INIT_VLC_USE_STATIC | INIT_VLC_LE);
+ &ir2_codes[0][0], 4, 2, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);
#else
- &ir2_codes[0][0], 4, 2, INIT_VLC_USE_STATIC);
+ init_vlc(&ir2_vlc, CODE_VLC_BITS, IR2_CODES,
+ &ir2_codes[0][1], 4, 2,
+ &ir2_codes[0][0], 4, 2, INIT_VLC_USE_NEW_STATIC);
#endif
return 0;
}
-AVCodec indeo2_decoder = {
- "indeo2",
- CODEC_TYPE_VIDEO,
- CODEC_ID_INDEO2,
- sizeof(Ir2Context),
- ir2_decode_init,
- NULL,
- NULL,
- ir2_decode_frame,
- CODEC_CAP_DR1,
+static av_cold int ir2_decode_end(AVCodecContext *avctx){
+ Ir2Context * const ic = avctx->priv_data;
+ AVFrame *pic = &ic->picture;
+
+ if (pic->data[0])
+ avctx->release_buffer(avctx, pic);
+
+ return 0;
+}
+
+AVCodec ff_indeo2_decoder = {
+ .name = "indeo2",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_INDEO2,
+ .priv_data_size = sizeof(Ir2Context),
+ .init = ir2_decode_init,
+ .close = ir2_decode_end,
+ .decode = ir2_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 2"),
};