* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file tta.c
+ * @file libavcodec/tta.c
* TTA (The Lossless True Audio) decoder
* (www.true-audio.com or tta.corecodec.org)
* @author Alex Beregszaszi
//#define DEBUG
#include <limits.h>
#include "avcodec.h"
-#include "bitstream.h"
+#include "get_bits.h"
#define FORMAT_INT 1
#define FORMAT_FLOAT 3
0x80000000, 0x80000000, 0x80000000, 0x80000000
};
-static const uint32_t *shift_16 = shift_1 + 4;
+static const uint32_t * const shift_16 = shift_1 + 4;
#endif
#define MAX_ORDER 16
int32_t dl[MAX_ORDER];
} TTAFilter;
-static int32_t ttafilter_configs[4][2] = {
+static const int32_t ttafilter_configs[4][2] = {
{10, 1},
{9, 1},
{10, 1},
return ret;
}
-// shamelessly copied from shorten.c
-static int inline get_le16(GetBitContext *gb)
-{
- return bswap_16(get_bits_long(gb, 16));
-}
-
-static int inline get_le32(GetBitContext *gb)
-{
- return bswap_32(get_bits_long(gb, 32));
-}
-
-static int tta_decode_init(AVCodecContext * avctx)
+static av_cold int tta_decode_init(AVCodecContext * avctx)
{
TTAContext *s = avctx->priv_data;
int i;
return -1;
init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size);
- if (show_bits_long(&s->gb, 32) == bswap_32(ff_get_fourcc("TTA1")))
+ if (show_bits_long(&s->gb, 32) == AV_RL32("TTA1"))
{
/* signature */
skip_bits(&s->gb, 32);
-// if (get_bits_long(&s->gb, 32) != bswap_32(ff_get_fourcc("TTA1"))) {
+// if (get_bits_long(&s->gb, 32) != bswap_32(AV_RL32("TTA1"))) {
// av_log(s->avctx, AV_LOG_ERROR, "Missing magic\n");
// 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);
- s->bps = (avctx->bits_per_sample + 7) / 8;
- avctx->sample_rate = get_le32(&s->gb);
+ avctx->channels = s->channels = get_bits(&s->gb, 16);
+ avctx->bits_per_coded_sample = get_bits(&s->gb, 16);
+ s->bps = (avctx->bits_per_coded_sample + 7) / 8;
+ 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)
(s->last_frame_length ? 1 : 0);
av_log(s->avctx, AV_LOG_DEBUG, "flags: %x chans: %d bps: %d rate: %d block: %d\n",
- s->flags, avctx->channels, avctx->bits_per_sample, avctx->sample_rate,
+ s->flags, avctx->channels, avctx->bits_per_coded_sample, avctx->sample_rate,
avctx->block_align);
av_log(s->avctx, AV_LOG_DEBUG, "data_length: %d frame_length: %d last: %d total: %d\n",
s->data_length, s->frame_length, s->last_frame_length, s->total_frames);
static int tta_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;
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);
return buf_size;
}
-static int tta_decode_close(AVCodecContext *avctx) {
+static av_cold int tta_decode_close(AVCodecContext *avctx) {
TTAContext *s = avctx->priv_data;
if (s->decode_buffer)
NULL,
tta_decode_close,
tta_decode_frame,
+ .long_name = NULL_IF_CONFIG_SMALL("True Audio (TTA)"),
};
projects / frescor / ffmpeg.git / blobdiff