2006-02-12 03:15:19 +01:00
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/*
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* TTA (The Lossless True Audio) decoder
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* Copyright (c) 2006 Alex Beregszaszi
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*
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2011-03-18 18:35:10 +01:00
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* This file is part of Libav.
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2006-10-07 17:30:46 +02:00
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*
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2011-03-18 18:35:10 +01:00
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* Libav is free software; you can redistribute it and/or
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2006-02-12 03:15:19 +01:00
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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2006-10-07 17:30:46 +02:00
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* version 2.1 of the License, or (at your option) any later version.
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2006-02-12 03:15:19 +01:00
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*
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2011-03-18 18:35:10 +01:00
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* Libav is distributed in the hope that it will be useful,
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2006-02-12 03:15:19 +01:00
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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2011-03-18 18:35:10 +01:00
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* License along with Libav; if not, write to the Free Software
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2007-07-05 12:40:25 +02:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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2006-02-12 03:15:19 +01:00
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*/
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/**
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2010-04-20 16:45:34 +02:00
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* @file
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2006-02-12 03:15:19 +01:00
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* TTA (The Lossless True Audio) decoder
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2011-07-14 03:56:07 +02:00
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* @see http://www.true-audio.com/
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* @see http://tta.corecodec.org/
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2006-02-12 03:15:19 +01:00
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* @author Alex Beregszaszi
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*/
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2011-12-22 16:33:31 +01:00
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#define BITSTREAM_READER_LE
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2006-02-12 03:15:19 +01:00
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//#define DEBUG
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#include <limits.h>
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#include "avcodec.h"
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2009-04-13 18:20:26 +02:00
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#include "get_bits.h"
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2012-11-10 13:22:56 +01:00
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#include "internal.h"
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2012-02-11 22:30:30 +01:00
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#include "libavutil/crc.h"
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2006-02-12 03:15:19 +01:00
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2011-09-22 18:54:28 +02:00
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#define FORMAT_SIMPLE 1
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#define FORMAT_ENCRYPTED 2
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2006-02-12 03:15:19 +01:00
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2010-06-24 20:17:12 +02:00
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#define MAX_ORDER 16
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typedef struct TTAFilter {
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2012-02-17 18:01:22 +01:00
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int32_t shift, round, error;
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2010-06-24 20:17:12 +02:00
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int32_t qm[MAX_ORDER];
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int32_t dx[MAX_ORDER];
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int32_t dl[MAX_ORDER];
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} TTAFilter;
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typedef struct TTARice {
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uint32_t k0, k1, sum0, sum1;
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} TTARice;
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typedef struct TTAChannel {
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int32_t predictor;
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TTAFilter filter;
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TTARice rice;
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} TTAChannel;
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2006-02-12 03:15:19 +01:00
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typedef struct TTAContext {
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AVCodecContext *avctx;
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2011-09-06 18:17:45 +02:00
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AVFrame frame;
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2006-02-12 03:15:19 +01:00
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GetBitContext gb;
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2012-02-11 22:30:30 +01:00
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const AVCRC *crc_table;
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2006-02-12 03:15:19 +01:00
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2012-03-29 21:44:55 +02:00
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int format, channels, bps;
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unsigned data_length;
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2012-02-10 23:51:11 +01:00
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int frame_length, last_frame_length;
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2006-02-12 03:15:19 +01:00
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2006-02-27 13:17:20 +01:00
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int32_t *decode_buffer;
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2010-06-24 20:17:12 +02:00
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2010-09-11 11:32:14 +02:00
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TTAChannel *ch_ctx;
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2006-02-12 03:15:19 +01:00
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} TTAContext;
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2006-02-27 13:17:20 +01:00
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static const uint32_t shift_1[] = {
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2006-02-12 03:15:19 +01:00
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0x00000001, 0x00000002, 0x00000004, 0x00000008,
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0x00000010, 0x00000020, 0x00000040, 0x00000080,
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0x00000100, 0x00000200, 0x00000400, 0x00000800,
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0x00001000, 0x00002000, 0x00004000, 0x00008000,
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0x00010000, 0x00020000, 0x00040000, 0x00080000,
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0x00100000, 0x00200000, 0x00400000, 0x00800000,
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0x01000000, 0x02000000, 0x04000000, 0x08000000,
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0x10000000, 0x20000000, 0x40000000, 0x80000000,
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0x80000000, 0x80000000, 0x80000000, 0x80000000,
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0x80000000, 0x80000000, 0x80000000, 0x80000000
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};
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2008-06-24 22:01:31 +02:00
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static const uint32_t * const shift_16 = shift_1 + 4;
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2006-02-12 03:15:19 +01:00
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2012-02-17 18:01:22 +01:00
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static const int32_t ttafilter_configs[4] = {
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10,
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9,
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10,
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12
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2006-02-12 03:15:19 +01:00
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};
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2012-02-17 18:01:22 +01:00
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static void ttafilter_init(TTAFilter *c, int32_t shift) {
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2006-02-12 03:15:19 +01:00
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memset(c, 0, sizeof(TTAFilter));
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c->shift = shift;
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c->round = shift_1[shift-1];
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// c->round = 1 << (shift - 1);
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}
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// FIXME: copy paste from original
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2006-02-27 13:17:20 +01:00
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static inline void memshl(register int32_t *a, register int32_t *b) {
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2006-02-12 03:15:19 +01:00
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*a++ = *b++;
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*a++ = *b++;
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*a++ = *b++;
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*a++ = *b++;
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*a++ = *b++;
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*a++ = *b++;
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*a++ = *b++;
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*a = *b;
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}
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2012-02-17 18:01:22 +01:00
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static inline void ttafilter_process(TTAFilter *c, int32_t *in)
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{
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2006-02-27 13:17:20 +01:00
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register int32_t *dl = c->dl, *qm = c->qm, *dx = c->dx, sum = c->round;
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2006-02-12 03:15:19 +01:00
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if (!c->error) {
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sum += *dl++ * *qm, qm++;
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sum += *dl++ * *qm, qm++;
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sum += *dl++ * *qm, qm++;
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sum += *dl++ * *qm, qm++;
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sum += *dl++ * *qm, qm++;
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sum += *dl++ * *qm, qm++;
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sum += *dl++ * *qm, qm++;
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sum += *dl++ * *qm, qm++;
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dx += 8;
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} else if(c->error < 0) {
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sum += *dl++ * (*qm -= *dx++), qm++;
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sum += *dl++ * (*qm -= *dx++), qm++;
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sum += *dl++ * (*qm -= *dx++), qm++;
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sum += *dl++ * (*qm -= *dx++), qm++;
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sum += *dl++ * (*qm -= *dx++), qm++;
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sum += *dl++ * (*qm -= *dx++), qm++;
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sum += *dl++ * (*qm -= *dx++), qm++;
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sum += *dl++ * (*qm -= *dx++), qm++;
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} else {
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sum += *dl++ * (*qm += *dx++), qm++;
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sum += *dl++ * (*qm += *dx++), qm++;
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sum += *dl++ * (*qm += *dx++), qm++;
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sum += *dl++ * (*qm += *dx++), qm++;
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sum += *dl++ * (*qm += *dx++), qm++;
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sum += *dl++ * (*qm += *dx++), qm++;
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sum += *dl++ * (*qm += *dx++), qm++;
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sum += *dl++ * (*qm += *dx++), qm++;
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}
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*(dx-0) = ((*(dl-1) >> 30) | 1) << 2;
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*(dx-1) = ((*(dl-2) >> 30) | 1) << 1;
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*(dx-2) = ((*(dl-3) >> 30) | 1) << 1;
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*(dx-3) = ((*(dl-4) >> 30) | 1);
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2012-02-17 18:01:22 +01:00
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c->error = *in;
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*in += (sum >> c->shift);
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*dl = *in;
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2006-02-12 03:15:19 +01:00
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2012-02-17 18:01:22 +01:00
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*(dl-1) = *dl - *(dl-1);
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*(dl-2) = *(dl-1) - *(dl-2);
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*(dl-3) = *(dl-2) - *(dl-3);
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2006-02-12 03:15:19 +01:00
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memshl(c->dl, c->dl + 1);
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memshl(c->dx, c->dx + 1);
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}
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2006-02-27 13:17:20 +01:00
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static void rice_init(TTARice *c, uint32_t k0, uint32_t k1)
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2006-02-12 03:15:19 +01:00
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{
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c->k0 = k0;
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c->k1 = k1;
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c->sum0 = shift_16[k0];
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c->sum1 = shift_16[k1];
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}
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static int tta_get_unary(GetBitContext *gb)
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{
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int ret = 0;
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// count ones
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2011-09-21 20:16:24 +02:00
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while (get_bits_left(gb) > 0 && get_bits1(gb))
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2006-02-12 03:15:19 +01:00
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ret++;
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return ret;
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}
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2012-02-11 22:30:30 +01:00
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static int tta_check_crc(TTAContext *s, const uint8_t *buf, int buf_size)
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{
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uint32_t crc, CRC;
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CRC = AV_RL32(buf + buf_size);
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crc = av_crc(s->crc_table, 0xFFFFFFFFU, buf, buf_size);
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if (CRC != (crc ^ 0xFFFFFFFFU)) {
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av_log(s->avctx, AV_LOG_ERROR, "CRC error\n");
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return AVERROR_INVALIDDATA;
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}
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return 0;
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}
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2008-03-21 04:11:20 +01:00
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static av_cold int tta_decode_init(AVCodecContext * avctx)
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2006-02-12 03:15:19 +01:00
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{
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TTAContext *s = avctx->priv_data;
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2012-02-10 23:51:11 +01:00
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int total_frames;
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2006-02-12 03:15:19 +01:00
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s->avctx = avctx;
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// 30bytes includes a seektable with one frame
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if (avctx->extradata_size < 30)
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return -1;
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2011-09-09 23:46:00 +02:00
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init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
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2009-01-17 13:21:01 +01:00
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if (show_bits_long(&s->gb, 32) == AV_RL32("TTA1"))
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2006-02-12 03:15:19 +01:00
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{
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2012-02-11 22:30:30 +01:00
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if (avctx->err_recognition & AV_EF_CRCCHECK) {
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s->crc_table = av_crc_get_table(AV_CRC_32_IEEE_LE);
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2012-03-06 21:26:48 +01:00
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tta_check_crc(s, avctx->extradata, 18);
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2012-02-11 22:30:30 +01:00
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}
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2006-02-12 03:15:19 +01:00
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/* signature */
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2012-02-05 20:39:13 +01:00
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skip_bits_long(&s->gb, 32);
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2006-02-12 03:15:19 +01:00
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2011-09-22 18:54:28 +02:00
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s->format = get_bits(&s->gb, 16);
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if (s->format > 2) {
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av_log(s->avctx, AV_LOG_ERROR, "Invalid format\n");
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2006-02-12 03:15:19 +01:00
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return -1;
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}
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2011-09-22 18:54:28 +02:00
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if (s->format == FORMAT_ENCRYPTED) {
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av_log_missing_feature(s->avctx, "Encrypted TTA", 0);
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2012-10-09 00:41:34 +02:00
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return AVERROR_PATCHWELCOME;
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2011-09-22 18:54:28 +02:00
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}
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2006-09-26 00:57:34 +02:00
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avctx->channels = s->channels = get_bits(&s->gb, 16);
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2008-09-08 16:24:59 +02:00
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avctx->bits_per_coded_sample = get_bits(&s->gb, 16);
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s->bps = (avctx->bits_per_coded_sample + 7) / 8;
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2006-09-26 00:57:34 +02:00
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avctx->sample_rate = get_bits_long(&s->gb, 32);
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s->data_length = get_bits_long(&s->gb, 32);
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2012-02-05 20:39:13 +01:00
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skip_bits_long(&s->gb, 32); // CRC32 of header
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2006-02-12 03:15:19 +01:00
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2011-12-10 20:40:57 +01:00
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if (s->channels == 0) {
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av_log(s->avctx, AV_LOG_ERROR, "Invalid number of channels\n");
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return AVERROR_INVALIDDATA;
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2012-02-10 19:51:43 +01:00
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} else if (avctx->sample_rate == 0) {
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av_log(s->avctx, AV_LOG_ERROR, "Invalid samplerate\n");
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return AVERROR_INVALIDDATA;
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2011-12-10 20:40:57 +01:00
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}
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2011-09-22 18:54:28 +02:00
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switch(s->bps) {
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2011-10-23 22:13:06 +02:00
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case 2:
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avctx->sample_fmt = AV_SAMPLE_FMT_S16;
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avctx->bits_per_raw_sample = 16;
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break;
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case 3:
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avctx->sample_fmt = AV_SAMPLE_FMT_S32;
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avctx->bits_per_raw_sample = 24;
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break;
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default:
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av_log(avctx, AV_LOG_ERROR, "Invalid/unsupported sample format.\n");
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return AVERROR_INVALIDDATA;
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2006-02-12 03:15:19 +01:00
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}
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2011-10-23 22:25:02 +02:00
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// prevent overflow
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2012-03-29 21:44:55 +02:00
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if (avctx->sample_rate > 0x7FFFFFu) {
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2011-10-23 22:25:02 +02:00
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av_log(avctx, AV_LOG_ERROR, "sample_rate too large\n");
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return AVERROR(EINVAL);
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}
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s->frame_length = 256 * avctx->sample_rate / 245;
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2006-02-12 03:15:19 +01:00
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s->last_frame_length = s->data_length % s->frame_length;
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2012-02-10 23:51:11 +01:00
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total_frames = s->data_length / s->frame_length +
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(s->last_frame_length ? 1 : 0);
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2006-02-12 03:15:19 +01:00
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2011-09-22 18:54:28 +02:00
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av_log(s->avctx, AV_LOG_DEBUG, "format: %d chans: %d bps: %d rate: %d block: %d\n",
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s->format, avctx->channels, avctx->bits_per_coded_sample, avctx->sample_rate,
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2006-02-12 03:15:19 +01:00
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avctx->block_align);
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av_log(s->avctx, AV_LOG_DEBUG, "data_length: %d frame_length: %d last: %d total: %d\n",
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2012-02-10 23:51:11 +01:00
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s->data_length, s->frame_length, s->last_frame_length, total_frames);
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2006-02-12 03:15:19 +01:00
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// FIXME: seek table
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2012-02-10 23:51:11 +01:00
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if (avctx->extradata_size <= 26 || total_frames > INT_MAX / 4 ||
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avctx->extradata_size - 26 < total_frames * 4)
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2012-02-11 22:30:30 +01:00
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av_log(avctx, AV_LOG_WARNING, "Seek table missing or too small\n");
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|
|
else if (avctx->err_recognition & AV_EF_CRCCHECK) {
|
2012-02-10 23:51:11 +01:00
|
|
|
if (tta_check_crc(s, avctx->extradata + 22, total_frames * 4))
|
2012-02-11 22:30:30 +01:00
|
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
}
|
2012-02-10 23:51:11 +01:00
|
|
|
skip_bits_long(&s->gb, 32 * total_frames);
|
2012-02-05 20:39:13 +01:00
|
|
|
skip_bits_long(&s->gb, 32); // CRC32 of seektable
|
2006-02-12 03:15:19 +01:00
|
|
|
|
2006-05-13 12:45:26 +02:00
|
|
|
if(s->frame_length >= UINT_MAX / (s->channels * sizeof(int32_t))){
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "frame_length too large\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2011-10-23 22:13:06 +02:00
|
|
|
if (s->bps == 2) {
|
|
|
|
s->decode_buffer = av_mallocz(sizeof(int32_t)*s->frame_length*s->channels);
|
2011-10-24 15:20:07 +02:00
|
|
|
if (!s->decode_buffer)
|
|
|
|
return AVERROR(ENOMEM);
|
2011-10-23 22:13:06 +02:00
|
|
|
}
|
2010-06-24 20:17:12 +02:00
|
|
|
s->ch_ctx = av_malloc(avctx->channels * sizeof(*s->ch_ctx));
|
2011-10-24 15:20:07 +02:00
|
|
|
if (!s->ch_ctx) {
|
|
|
|
av_freep(&s->decode_buffer);
|
2010-06-24 20:17:12 +02:00
|
|
|
return AVERROR(ENOMEM);
|
2011-10-24 15:20:07 +02:00
|
|
|
}
|
2006-02-12 03:15:19 +01:00
|
|
|
} else {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Wrong extradata present\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2011-09-06 18:17:45 +02:00
|
|
|
avcodec_get_frame_defaults(&s->frame);
|
|
|
|
avctx->coded_frame = &s->frame;
|
|
|
|
|
2006-02-12 03:15:19 +01:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-09-06 18:17:45 +02:00
|
|
|
static int tta_decode_frame(AVCodecContext *avctx, void *data,
|
|
|
|
int *got_frame_ptr, AVPacket *avpkt)
|
2006-02-12 03:15:19 +01:00
|
|
|
{
|
2009-04-07 17:59:50 +02:00
|
|
|
const uint8_t *buf = avpkt->data;
|
|
|
|
int buf_size = avpkt->size;
|
2006-02-12 03:15:19 +01:00
|
|
|
TTAContext *s = avctx->priv_data;
|
2011-09-06 18:17:45 +02:00
|
|
|
int i, ret;
|
2011-09-22 19:19:36 +02:00
|
|
|
int cur_chan = 0, framelen = s->frame_length;
|
|
|
|
int32_t *p;
|
2006-02-12 03:15:19 +01:00
|
|
|
|
2012-02-11 22:30:30 +01:00
|
|
|
if (avctx->err_recognition & AV_EF_CRCCHECK) {
|
|
|
|
if (buf_size < 4 || tta_check_crc(s, buf, buf_size - 4))
|
|
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
}
|
|
|
|
|
2006-02-12 03:15:19 +01:00
|
|
|
init_get_bits(&s->gb, buf, buf_size*8);
|
|
|
|
|
2011-09-06 18:17:45 +02:00
|
|
|
/* get output buffer */
|
|
|
|
s->frame.nb_samples = framelen;
|
2012-11-10 13:22:56 +01:00
|
|
|
if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
|
2011-09-06 18:17:45 +02:00
|
|
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
|
|
|
return ret;
|
2011-09-22 19:21:38 +02:00
|
|
|
}
|
|
|
|
|
2011-10-23 22:13:06 +02:00
|
|
|
// decode directly to output buffer for 24-bit sample format
|
|
|
|
if (s->bps == 3)
|
2012-01-07 16:25:32 +01:00
|
|
|
s->decode_buffer = (int32_t *)s->frame.data[0];
|
2011-10-23 22:13:06 +02:00
|
|
|
|
2011-09-22 19:21:38 +02:00
|
|
|
// init per channel states
|
|
|
|
for (i = 0; i < s->channels; i++) {
|
|
|
|
s->ch_ctx[i].predictor = 0;
|
2012-02-17 18:01:22 +01:00
|
|
|
ttafilter_init(&s->ch_ctx[i].filter, ttafilter_configs[s->bps-1]);
|
2011-09-22 19:21:38 +02:00
|
|
|
rice_init(&s->ch_ctx[i].rice, 10, 10);
|
|
|
|
}
|
2011-09-22 19:09:05 +02:00
|
|
|
|
2012-02-10 23:51:11 +01:00
|
|
|
i = 0;
|
2011-09-22 19:21:38 +02:00
|
|
|
for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++) {
|
|
|
|
int32_t *predictor = &s->ch_ctx[cur_chan].predictor;
|
|
|
|
TTAFilter *filter = &s->ch_ctx[cur_chan].filter;
|
|
|
|
TTARice *rice = &s->ch_ctx[cur_chan].rice;
|
|
|
|
uint32_t unary, depth, k;
|
|
|
|
int32_t value;
|
|
|
|
|
|
|
|
unary = tta_get_unary(&s->gb);
|
|
|
|
|
|
|
|
if (unary == 0) {
|
|
|
|
depth = 0;
|
|
|
|
k = rice->k0;
|
|
|
|
} else {
|
|
|
|
depth = 1;
|
|
|
|
k = rice->k1;
|
|
|
|
unary--;
|
2006-02-12 03:15:19 +01:00
|
|
|
}
|
|
|
|
|
2012-02-09 20:49:59 +01:00
|
|
|
if (get_bits_left(&s->gb) < k) {
|
|
|
|
ret = AVERROR_INVALIDDATA;
|
|
|
|
goto error;
|
|
|
|
}
|
2006-02-12 03:15:19 +01:00
|
|
|
|
2011-09-22 19:21:38 +02:00
|
|
|
if (k) {
|
2012-02-09 20:49:59 +01:00
|
|
|
if (k > MIN_CACHE_BITS) {
|
|
|
|
ret = AVERROR_INVALIDDATA;
|
|
|
|
goto error;
|
|
|
|
}
|
2011-09-22 19:21:38 +02:00
|
|
|
value = (unary << k) + get_bits(&s->gb, k);
|
|
|
|
} else
|
|
|
|
value = unary;
|
|
|
|
|
|
|
|
// FIXME: copy paste from original
|
|
|
|
switch (depth) {
|
|
|
|
case 1:
|
|
|
|
rice->sum1 += value - (rice->sum1 >> 4);
|
|
|
|
if (rice->k1 > 0 && rice->sum1 < shift_16[rice->k1])
|
|
|
|
rice->k1--;
|
|
|
|
else if(rice->sum1 > shift_16[rice->k1 + 1])
|
|
|
|
rice->k1++;
|
|
|
|
value += shift_1[rice->k0];
|
|
|
|
default:
|
|
|
|
rice->sum0 += value - (rice->sum0 >> 4);
|
|
|
|
if (rice->k0 > 0 && rice->sum0 < shift_16[rice->k0])
|
|
|
|
rice->k0--;
|
|
|
|
else if(rice->sum0 > shift_16[rice->k0 + 1])
|
|
|
|
rice->k0++;
|
|
|
|
}
|
2010-03-03 20:31:46 +01:00
|
|
|
|
2011-09-22 19:21:38 +02:00
|
|
|
// extract coded value
|
2012-02-17 03:51:03 +01:00
|
|
|
*p = 1 + ((value >> 1) ^ ((value & 1) - 1));
|
2006-02-12 03:15:19 +01:00
|
|
|
|
2011-09-22 19:21:38 +02:00
|
|
|
// run hybrid filter
|
2012-02-17 18:01:22 +01:00
|
|
|
ttafilter_process(filter, p);
|
2006-02-12 03:15:19 +01:00
|
|
|
|
2011-09-22 19:21:38 +02:00
|
|
|
// fixed order prediction
|
2006-02-27 13:17:20 +01:00
|
|
|
#define PRED(x, k) (int32_t)((((uint64_t)x << k) - x) >> k)
|
2011-09-22 19:21:38 +02:00
|
|
|
switch (s->bps) {
|
2012-02-18 02:25:46 +01:00
|
|
|
case 1: *p += PRED(*predictor, 4); break;
|
|
|
|
case 2:
|
|
|
|
case 3: *p += PRED(*predictor, 5); break;
|
|
|
|
case 4: *p += *predictor; break;
|
2011-09-22 19:21:38 +02:00
|
|
|
}
|
|
|
|
*predictor = *p;
|
|
|
|
|
|
|
|
// flip channels
|
|
|
|
if (cur_chan < (s->channels-1))
|
|
|
|
cur_chan++;
|
|
|
|
else {
|
2012-05-15 18:32:02 +02:00
|
|
|
// decorrelate in case of multiple channels
|
2011-09-22 19:21:38 +02:00
|
|
|
if (s->channels > 1) {
|
|
|
|
int32_t *r = p - 1;
|
|
|
|
for (*p += *r / 2; r > p - s->channels; r--)
|
|
|
|
*r = *(r + 1) - *r;
|
2006-02-12 03:15:19 +01:00
|
|
|
}
|
2011-09-22 19:21:38 +02:00
|
|
|
cur_chan = 0;
|
2012-02-10 23:51:11 +01:00
|
|
|
i++;
|
|
|
|
// check for last frame
|
|
|
|
if (i == s->last_frame_length && get_bits_left(&s->gb) / 8 == 4) {
|
|
|
|
s->frame.nb_samples = framelen = s->last_frame_length;
|
|
|
|
break;
|
|
|
|
}
|
2006-02-12 03:15:19 +01:00
|
|
|
}
|
2011-09-22 19:21:38 +02:00
|
|
|
}
|
2006-02-12 03:15:19 +01:00
|
|
|
|
2012-02-10 23:51:11 +01:00
|
|
|
align_get_bits(&s->gb);
|
2012-02-09 20:49:59 +01:00
|
|
|
if (get_bits_left(&s->gb) < 32) {
|
|
|
|
ret = AVERROR_INVALIDDATA;
|
|
|
|
goto error;
|
|
|
|
}
|
2012-02-05 20:39:13 +01:00
|
|
|
skip_bits_long(&s->gb, 32); // frame crc
|
2011-09-22 19:21:38 +02:00
|
|
|
|
|
|
|
// convert to output buffer
|
2011-10-23 22:13:06 +02:00
|
|
|
if (s->bps == 2) {
|
2011-09-06 18:17:45 +02:00
|
|
|
int16_t *samples = (int16_t *)s->frame.data[0];
|
2011-10-23 22:13:06 +02:00
|
|
|
for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++)
|
|
|
|
*samples++ = *p;
|
|
|
|
} else {
|
|
|
|
// shift samples for 24-bit sample format
|
2011-09-06 18:17:45 +02:00
|
|
|
int32_t *samples = (int32_t *)s->frame.data[0];
|
2011-11-04 03:48:15 +01:00
|
|
|
for (i = 0; i < framelen * s->channels; i++)
|
2011-10-23 22:13:06 +02:00
|
|
|
*samples++ <<= 8;
|
|
|
|
// reset decode buffer
|
|
|
|
s->decode_buffer = NULL;
|
2011-09-22 19:21:38 +02:00
|
|
|
}
|
2006-02-12 03:15:19 +01:00
|
|
|
|
2011-09-06 18:17:45 +02:00
|
|
|
*got_frame_ptr = 1;
|
|
|
|
*(AVFrame *)data = s->frame;
|
2011-10-23 22:13:06 +02:00
|
|
|
|
2006-02-12 03:15:19 +01:00
|
|
|
return buf_size;
|
2012-02-09 20:49:59 +01:00
|
|
|
error:
|
|
|
|
// reset decode buffer
|
|
|
|
if (s->bps == 3)
|
|
|
|
s->decode_buffer = NULL;
|
|
|
|
return ret;
|
2006-02-12 03:15:19 +01:00
|
|
|
}
|
|
|
|
|
2008-03-21 04:11:20 +01:00
|
|
|
static av_cold int tta_decode_close(AVCodecContext *avctx) {
|
2006-02-12 03:15:19 +01:00
|
|
|
TTAContext *s = avctx->priv_data;
|
|
|
|
|
2011-02-03 02:09:36 +01:00
|
|
|
av_free(s->decode_buffer);
|
2010-06-24 20:17:12 +02:00
|
|
|
av_freep(&s->ch_ctx);
|
2006-02-12 03:15:19 +01:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-01-25 22:40:11 +01:00
|
|
|
AVCodec ff_tta_decoder = {
|
2011-07-17 12:54:31 +02:00
|
|
|
.name = "tta",
|
|
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
2012-08-05 11:11:04 +02:00
|
|
|
.id = AV_CODEC_ID_TTA,
|
2011-07-17 12:54:31 +02:00
|
|
|
.priv_data_size = sizeof(TTAContext),
|
|
|
|
.init = tta_decode_init,
|
|
|
|
.close = tta_decode_close,
|
|
|
|
.decode = tta_decode_frame,
|
2011-09-06 18:17:45 +02:00
|
|
|
.capabilities = CODEC_CAP_DR1,
|
2012-07-24 03:23:48 +02:00
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("TTA (True Audio)"),
|
2006-02-12 03:15:19 +01:00
|
|
|
};
|