* TTA (The Lossless True Audio) decoder
* Copyright (c) 2006 Alex Beregszaszi
*
- * This library is free software; you can redistribute it and/or
+ * 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 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,
+ * 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 this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
return ret;
}
-// shamelessly copied from shorten.c
-static int inline get_le16(GetBitContext *gb)
-{
- return get_bits_long(gb, 16);
-}
-
-static int inline get_le32(GetBitContext *gb)
-{
- return get_bits_long(gb, 32);
-}
-
static int tta_decode_init(AVCodecContext * avctx)
{
TTAContext *s = avctx->priv_data;
// return -1;
// }
- s->flags = get_le16(&s->gb);
+ s->flags = get_bits(&s->gb, 16);
if (s->flags != 1 && s->flags != 3)
{
av_log(s->avctx, AV_LOG_ERROR, "Invalid flags\n");
return -1;
}
s->is_float = (s->flags == FORMAT_FLOAT);
- avctx->channels = s->channels = get_le16(&s->gb);
- avctx->bits_per_sample = get_le16(&s->gb);
+ avctx->channels = s->channels = get_bits(&s->gb, 16);
+ avctx->bits_per_sample = get_bits(&s->gb, 16);
s->bps = (avctx->bits_per_sample + 7) / 8;
- avctx->sample_rate = get_le32(&s->gb);
+ avctx->sample_rate = get_bits_long(&s->gb, 32);
if(avctx->sample_rate > 1000000){ //prevent FRAME_TIME * avctx->sample_rate from overflowing and sanity check
av_log(avctx, AV_LOG_ERROR, "sample_rate too large\n");
return -1;
}
- s->data_length = get_le32(&s->gb);
+ s->data_length = get_bits_long(&s->gb, 32);
skip_bits(&s->gb, 32); // CRC32 of header
if (s->is_float)
static int tta_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ const uint8_t *buf, int buf_size)
{
TTAContext *s = avctx->priv_data;
int i;
rice->k0++;
}
- // extract sign
-#define SIGN(x) (((x)&1) ? (++(x)>>1) : (-(x)>>1))
- *p = SIGN(value);
+ // extract coded value
+#define UNFOLD(x) (((x)&1) ? (++(x)>>1) : (-(x)>>1))
+ *p = UNFOLD(value);
// run hybrid filter
ttafilter_process(filter, p, 0);