* 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
int flags, channels, bps, is_float, data_length;
int frame_length, last_frame_length, total_frames;
- long *decode_buffer;
+ int32_t *decode_buffer;
} TTAContext;
#if 0
return 0x80000000; // 16 << 27
}
#else
-static const unsigned long shift_1[] = {
+static const uint32_t shift_1[] = {
0x00000001, 0x00000002, 0x00000004, 0x00000008,
0x00000010, 0x00000020, 0x00000040, 0x00000080,
0x00000100, 0x00000200, 0x00000400, 0x00000800,
0x80000000, 0x80000000, 0x80000000, 0x80000000
};
-static const unsigned long *shift_16 = shift_1 + 4;
+static const uint32_t * const shift_16 = shift_1 + 4;
#endif
#define MAX_ORDER 16
typedef struct TTAFilter {
- long shift, round, error, mode;
- long qm[MAX_ORDER];
- long dx[MAX_ORDER];
- long dl[MAX_ORDER];
+ int32_t shift, round, error, mode;
+ int32_t qm[MAX_ORDER];
+ int32_t dx[MAX_ORDER];
+ int32_t dl[MAX_ORDER];
} TTAFilter;
-static long ttafilter_configs[4][2] = {
+static const int32_t ttafilter_configs[4][2] = {
{10, 1},
{9, 1},
{10, 1},
{12, 0}
};
-static void ttafilter_init(TTAFilter *c, long shift, long mode) {
+static void ttafilter_init(TTAFilter *c, int32_t shift, int32_t mode) {
memset(c, 0, sizeof(TTAFilter));
c->shift = shift;
c->round = shift_1[shift-1];
}
// FIXME: copy paste from original
-static inline void memshl(register long *a, register long *b) {
+static inline void memshl(register int32_t *a, register int32_t *b) {
*a++ = *b++;
*a++ = *b++;
*a++ = *b++;
// FIXME: copy paste from original
// mode=1 encoder, mode=0 decoder
-static inline void ttafilter_process(TTAFilter *c, long *in, long mode) {
- register long *dl = c->dl, *qm = c->qm, *dx = c->dx, sum = c->round;
+static inline void ttafilter_process(TTAFilter *c, int32_t *in, int32_t mode) {
+ register int32_t *dl = c->dl, *qm = c->qm, *dx = c->dx, sum = c->round;
if (!c->error) {
sum += *dl++ * *qm, qm++;
}
typedef struct TTARice {
- unsigned long k0, k1, sum0, sum1;
+ uint32_t k0, k1, sum0, sum1;
} TTARice;
-static void rice_init(TTARice *c, unsigned long k0, unsigned long k1)
+static void rice_init(TTARice *c, uint32_t k0, uint32_t k1)
{
c->k0 = k0;
c->k1 = k1;
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);
- s->data_length = 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_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);
skip_bits(&s->gb, 32);
skip_bits(&s->gb, 32); // CRC32 of seektable
- s->decode_buffer = av_mallocz(sizeof(long)*s->frame_length*s->channels);
+ if(s->frame_length >= UINT_MAX / (s->channels * sizeof(int32_t))){
+ av_log(avctx, AV_LOG_ERROR, "frame_length too large\n");
+ return -1;
+ }
+
+ s->decode_buffer = av_mallocz(sizeof(int32_t)*s->frame_length*s->channels);
} else {
av_log(avctx, AV_LOG_ERROR, "Wrong extradata present\n");
return -1;
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;
init_get_bits(&s->gb, buf, buf_size*8);
{
- long predictors[s->channels];
+ int32_t predictors[s->channels];
TTAFilter filters[s->channels];
TTARice rices[s->channels];
int cur_chan = 0, framelen = s->frame_length;
- long *p;
+ int32_t *p;
// FIXME: seeking
s->total_frames--;
}
for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++) {
- long *predictor = &(predictors[cur_chan]);
+ int32_t *predictor = &(predictors[cur_chan]);
TTAFilter *filter = &(filters[cur_chan]);
TTARice *rice = &(rices[cur_chan]);
- unsigned long unary, depth, k;
- long value;
+ uint32_t unary, depth, k;
+ int32_t value;
unary = tta_get_unary(&s->gb);
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);
// fixed order prediction
-#define PRED(x, k) (long)((((uint64_t)x << k) - x) >> k)
+#define PRED(x, k) (int32_t)((((uint64_t)x << k) - x) >> k)
switch (s->bps) {
case 1: *p += PRED(*predictor, 4); break;
case 2:
#if 0
// extract 32bit float from last two int samples
if (s->is_float && ((p - data) & 1)) {
- unsigned long neg = *p & 0x80000000;
- unsigned long hi = *(p - 1);
- unsigned long lo = abs(*p) - 1;
+ uint32_t neg = *p & 0x80000000;
+ uint32_t hi = *(p - 1);
+ uint32_t lo = abs(*p) - 1;
hi += (hi || lo) ? 0x3f80 : 0;
// SWAP16: swap all the 16 bits
else {
// decorrelate in case of stereo integer
if (!s->is_float && (s->channels > 1)) {
- long *r = p - 1;
+ int32_t *r = p - 1;
for (*p += *r / 2; r > p - s->channels; r--)
*r = *(r + 1) - *r;
}
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"),
};
projects / ffmpeg / blobdiff