* Smacker decoder
* Copyright (c) 2006 Konstantin Shishkov
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avcodec.h"
#include "libavutil/audioconvert.h"
+#include "mathops.h"
#define ALT_BITSTREAM_READER_LE
#include "get_bits.h"
}
/**
- * Store large tree as Libav's vlc codes
+ * Store large tree as FFmpeg's vlc codes
*/
static int smacker_decode_header_tree(SmackVContext *smk, GetBitContext *gb, int **recodes, int *last, int size)
{
if(buf_size <= 769)
return 0;
- smk->pic.reference = 1;
+ smk->pic.reference = 3;
smk->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
if(avctx->reget_buffer(avctx, &smk->pic) < 0){
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
avctx->pix_fmt = PIX_FMT_PAL8;
+ avcodec_get_frame_defaults(&c->pic);
/* decode huffman trees from extradata */
if(avctx->extradata_size < 16){
HuffContext h[4];
VLC vlc[4];
int16_t *samples = data;
- int8_t *samples8 = data;
+ uint8_t *samples8 = data;
int val;
int i, res;
int unp_size;
int bits, stereo;
int pred[2] = {0, 0};
+ if (buf_size <= 4) {
+ av_log(avctx, AV_LOG_ERROR, "packet is too small\n");
+ return AVERROR(EINVAL);
+ }
+
unp_size = AV_RL32(buf);
init_get_bits(&gb, buf + 4, (buf_size - 4) * 8);
av_log(avctx, AV_LOG_ERROR, "Frame is too large to fit in buffer\n");
return -1;
}
+ if (stereo ^ (avctx->channels != 1)) {
+ av_log(avctx, AV_LOG_ERROR, "channels mismatch\n");
+ return AVERROR(EINVAL);
+ }
+ if (bits && avctx->sample_fmt == AV_SAMPLE_FMT_U8) {
+ av_log(avctx, AV_LOG_ERROR, "sample format mismatch\n");
+ return AVERROR(EINVAL);
+ }
memset(vlc, 0, sizeof(VLC) * 4);
memset(h, 0, sizeof(HuffContext) * 4);
else
res = 0;
val |= h[3].values[res] << 8;
- pred[1] += (int16_t)val;
- *samples++ = pred[1];
+ pred[1] += sign_extend(val, 16);
+ *samples++ = av_clip_int16(pred[1]);
} else {
if(vlc[0].table)
res = get_vlc2(&gb, vlc[0].table, SMKTREE_BITS, 3);
else
res = 0;
val |= h[1].values[res] << 8;
- pred[0] += val;
- *samples++ = pred[0];
+ pred[0] += sign_extend(val, 16);
+ *samples++ = av_clip_int16(pred[0]);
}
}
} else { //8-bit data
res = get_vlc2(&gb, vlc[1].table, SMKTREE_BITS, 3);
else
res = 0;
- pred[1] += (int8_t)h[1].values[res];
- *samples8++ = pred[1];
+ pred[1] += sign_extend(h[1].values[res], 8);
+ *samples8++ = av_clip_uint8(pred[1]);
} else {
if(vlc[0].table)
res = get_vlc2(&gb, vlc[0].table, SMKTREE_BITS, 3);
else
res = 0;
- pred[0] += (int8_t)h[0].values[res];
- *samples8++ = pred[0];
+ pred[0] += sign_extend(h[0].values[res], 8);
+ *samples8++ = av_clip_uint8(pred[0]);
}
}
}