* TTA (The Lossless True Audio) decoder
* Copyright (c) 2006 Alex Beregszaszi
*
- * 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
*/
// c->round = 1 << (shift - 1);
}
-// FIXME: copy paste from original
-static inline void memshl(register int32_t *a, register int32_t *b) {
- *a++ = *b++;
- *a++ = *b++;
- *a++ = *b++;
- *a++ = *b++;
- *a++ = *b++;
- *a++ = *b++;
- *a++ = *b++;
- *a = *b;
-}
-
static inline void ttafilter_process(TTAFilter *c, int32_t *in)
{
register int32_t *dl = c->dl, *qm = c->qm, *dx = c->dx, sum = c->round;
- if (!c->error) {
- sum += *dl++ * *qm, qm++;
- sum += *dl++ * *qm, qm++;
- sum += *dl++ * *qm, qm++;
- sum += *dl++ * *qm, qm++;
- sum += *dl++ * *qm, qm++;
- sum += *dl++ * *qm, qm++;
- sum += *dl++ * *qm, qm++;
- sum += *dl++ * *qm, qm++;
- dx += 8;
- } else if(c->error < 0) {
- sum += *dl++ * (*qm -= *dx++), qm++;
- sum += *dl++ * (*qm -= *dx++), qm++;
- sum += *dl++ * (*qm -= *dx++), qm++;
- sum += *dl++ * (*qm -= *dx++), qm++;
- sum += *dl++ * (*qm -= *dx++), qm++;
- sum += *dl++ * (*qm -= *dx++), qm++;
- sum += *dl++ * (*qm -= *dx++), qm++;
- sum += *dl++ * (*qm -= *dx++), qm++;
- } else {
- sum += *dl++ * (*qm += *dx++), qm++;
- sum += *dl++ * (*qm += *dx++), qm++;
- sum += *dl++ * (*qm += *dx++), qm++;
- sum += *dl++ * (*qm += *dx++), qm++;
- sum += *dl++ * (*qm += *dx++), qm++;
- sum += *dl++ * (*qm += *dx++), qm++;
- sum += *dl++ * (*qm += *dx++), qm++;
- sum += *dl++ * (*qm += *dx++), qm++;
+ if (c->error < 0) {
+ qm[0] -= dx[0]; qm[1] -= dx[1]; qm[2] -= dx[2]; qm[3] -= dx[3];
+ qm[4] -= dx[4]; qm[5] -= dx[5]; qm[6] -= dx[6]; qm[7] -= dx[7];
+ } else if (c->error > 0) {
+ qm[0] += dx[0]; qm[1] += dx[1]; qm[2] += dx[2]; qm[3] += dx[3];
+ qm[4] += dx[4]; qm[5] += dx[5]; qm[6] += dx[6]; qm[7] += dx[7];
}
- *(dx-0) = ((*(dl-1) >> 30) | 1) << 2;
- *(dx-1) = ((*(dl-2) >> 30) | 1) << 1;
- *(dx-2) = ((*(dl-3) >> 30) | 1) << 1;
- *(dx-3) = ((*(dl-4) >> 30) | 1);
+ sum += dl[0] * qm[0] + dl[1] * qm[1] + dl[2] * qm[2] + dl[3] * qm[3] +
+ dl[4] * qm[4] + dl[5] * qm[5] + dl[6] * qm[6] + dl[7] * qm[7];
+
+ dx[0] = dx[1]; dx[1] = dx[2]; dx[2] = dx[3]; dx[3] = dx[4];
+ dl[0] = dl[1]; dl[1] = dl[2]; dl[2] = dl[3]; dl[3] = dl[4];
+
+ dx[4] = ((dl[4] >> 30) | 1);
+ dx[5] = ((dl[5] >> 30) | 2) & ~1;
+ dx[6] = ((dl[6] >> 30) | 2) & ~1;
+ dx[7] = ((dl[7] >> 30) | 4) & ~3;
c->error = *in;
*in += (sum >> c->shift);
- *dl = *in;
- *(dl-1) = *dl - *(dl-1);
- *(dl-2) = *(dl-1) - *(dl-2);
- *(dl-3) = *(dl-2) - *(dl-3);
-
- memshl(c->dl, c->dl + 1);
- memshl(c->dx, c->dx + 1);
+ dl[4] = -dl[5]; dl[5] = -dl[6];
+ dl[6] = *in - dl[7]; dl[7] = *in;
+ dl[5] += dl[6]; dl[4] += dl[5];
}
static void rice_init(TTARice *c, uint32_t k0, uint32_t k1)
return ret;
}
+static const int64_t tta_channel_layouts[7] = {
+ AV_CH_LAYOUT_STEREO,
+ AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY,
+ AV_CH_LAYOUT_QUAD,
+ 0,
+ AV_CH_LAYOUT_5POINT1_BACK,
+ AV_CH_LAYOUT_5POINT1_BACK|AV_CH_BACK_CENTER,
+ AV_CH_LAYOUT_7POINT1_WIDE
+};
+
static int tta_check_crc(TTAContext *s, const uint8_t *buf, int buf_size)
{
uint32_t crc, CRC;
{
if (avctx->err_recognition & AV_EF_CRCCHECK) {
s->crc_table = av_crc_get_table(AV_CRC_32_IEEE_LE);
- if (tta_check_crc(s, avctx->extradata, 18))
- return AVERROR_INVALIDDATA;
+ tta_check_crc(s, avctx->extradata, 18);
}
/* signature */
return AVERROR(EINVAL);
}
avctx->channels = s->channels = get_bits(&s->gb, 16);
+ if (s->channels > 1 && s->channels < 9)
+ avctx->channel_layout = tta_channel_layouts[s->channels-2];
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);
}
switch(s->bps) {
+ case 1: avctx->sample_fmt = AV_SAMPLE_FMT_U8; break;
case 2:
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
avctx->bits_per_raw_sample = 16;
avctx->sample_fmt = AV_SAMPLE_FMT_S32;
avctx->bits_per_raw_sample = 24;
break;
+ //case 4: avctx->sample_fmt = AV_SAMPLE_FMT_S32; break;
default:
av_log(avctx, AV_LOG_ERROR, "Invalid/unsupported sample format.\n");
return AVERROR_INVALIDDATA;
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);
+ if (s->total_frames < 0)
+ return AVERROR_INVALIDDATA;
+
// FIXME: seek table
if (get_bits_left(&s->gb) < 32 * s->total_frames + 32)
av_log(avctx, AV_LOG_WARNING, "Seek table missing or too small\n");
else if (avctx->err_recognition & AV_EF_CRCCHECK) {
- if (tta_check_crc(s, avctx->extradata + 22, s->total_frames * 4))
+ if (avctx->extradata_size < 26 + s->total_frames * 4 || tta_check_crc(s, avctx->extradata + 22, s->total_frames * 4))
return AVERROR_INVALIDDATA;
}
skip_bits_long(&s->gb, 32 * s->total_frames);
return -1;
}
- if (s->bps == 2) {
+ if (s->bps < 3) {
s->decode_buffer = av_mallocz(sizeof(int32_t)*s->frame_length*s->channels);
if (!s->decode_buffer)
return AVERROR(ENOMEM);
- }
+ } else
+ s->decode_buffer = NULL;
s->ch_ctx = av_malloc(avctx->channels * sizeof(*s->ch_ctx));
if (!s->ch_ctx) {
av_freep(&s->decode_buffer);
}
// extract coded value
-#define UNFOLD(x) (((x)&1) ? (++(x)>>1) : (-(x)>>1))
- *p = UNFOLD(value);
+ *p = 1 + ((value >> 1) ^ ((value & 1) - 1));
// run hybrid filter
ttafilter_process(filter, p);
// fixed order prediction
#define PRED(x, k) (int32_t)((((uint64_t)x << k) - x) >> k)
switch (s->bps) {
- case 1: *p += PRED(*predictor, 4); break;
- case 2:
- case 3: *p += PRED(*predictor, 5); break;
- case 4: *p += *predictor; break;
+ case 1: *p += PRED(*predictor, 4); break;
+ case 2:
+ case 3: *p += PRED(*predictor, 5); break;
+ case 4: *p += *predictor; break;
}
*predictor = *p;
skip_bits_long(&s->gb, 32); // frame crc
// convert to output buffer
- if (s->bps == 2) {
- int16_t *samples = (int16_t *)s->frame.data[0];
+ switch (s->bps) {
+ case 1: {
+ uint8_t *samples = (uint8_t *)s->frame.data[0];
+ for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++)
+ *samples++ = *p + 0x80;
+ break;
+ }
+ case 2: {
+ uint16_t *samples = (int16_t *)s->frame.data[0];
for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++)
*samples++ = *p;
- } else {
+ break;
+ }
+ case 3: {
// shift samples for 24-bit sample format
int32_t *samples = (int32_t *)s->frame.data[0];
- for (i = 0; i < framelen * s->channels; i++)
+ for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++)
*samples++ <<= 8;
// reset decode buffer
s->decode_buffer = NULL;
+ break;
+ }
}
*got_frame_ptr = 1;
static av_cold int tta_decode_close(AVCodecContext *avctx) {
TTAContext *s = avctx->priv_data;
- av_free(s->decode_buffer);
+ if (s->bps < 3)
+ av_free(s->decode_buffer);
+ s->decode_buffer = NULL;
av_freep(&s->ch_ctx);
return 0;
.close = tta_decode_close,
.decode = tta_decode_frame,
.capabilities = CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("True Audio (TTA)"),
+ .long_name = NULL_IF_CONFIG_SMALL("True Audio (TTA)"),
};
projects / ffmpeg / blobdiff