FFmpeg
dca.c
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1 /*
2  * DCA compatible decoder data
3  * Copyright (C) 2004 Gildas Bazin
4  * Copyright (C) 2004 Benjamin Zores
5  * Copyright (C) 2006 Benjamin Larsson
6  * Copyright (C) 2007 Konstantin Shishkov
7  *
8  * This file is part of FFmpeg.
9  *
10  * FFmpeg is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * FFmpeg is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with FFmpeg; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
25 #include <stdint.h>
26 #include <string.h>
27 
28 #include "libavutil/error.h"
29 
30 #include "dca.h"
31 #include "dca_core.h"
32 #include "dca_syncwords.h"
33 #include "get_bits.h"
34 #include "put_bits.h"
35 
36 const uint32_t avpriv_dca_sample_rates[16] = {
37  0, 8000, 16000, 32000, 0, 0, 11025, 22050, 44100, 0, 0,
38  12000, 24000, 48000, 96000, 192000
39 };
40 
41 const uint32_t ff_dca_sampling_freqs[16] = {
42  8000, 16000, 32000, 64000, 128000, 22050, 44100, 88200,
43  176400, 352800, 12000, 24000, 48000, 96000, 192000, 384000,
44 };
45 
46 const uint8_t ff_dca_freq_ranges[16] = {
47  0, 1, 2, 3, 4, 1, 2, 3, 4, 4, 0, 1, 2, 3, 4, 4
48 };
49 
50 const uint8_t ff_dca_bits_per_sample[8] = {
51  16, 16, 20, 20, 0, 24, 24, 0
52 };
53 
54 int avpriv_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst,
55  int max_size)
56 {
57  uint32_t mrk;
58  int i, tmp;
59  PutBitContext pb;
60 
61  if ((unsigned) src_size > (unsigned) max_size)
62  src_size = max_size;
63 
64  mrk = AV_RB32(src);
65  switch (mrk) {
68  memcpy(dst, src, src_size);
69  return src_size;
71  for (i = 0; i < (src_size + 1) >> 1; i++) {
72  AV_WB16(dst, AV_RL16(src));
73  src += 2;
74  dst += 2;
75  }
76  return src_size;
79  init_put_bits(&pb, dst, max_size);
80  for (i = 0; i < (src_size + 1) >> 1; i++, src += 2) {
81  tmp = ((mrk == DCA_SYNCWORD_CORE_14B_BE) ? AV_RB16(src) : AV_RL16(src)) & 0x3FFF;
82  put_bits(&pb, 14, tmp);
83  }
84  flush_put_bits(&pb);
85  return put_bytes_output(&pb);
86  default:
87  return AVERROR_INVALIDDATA;
88  }
89 }
90 
92 {
93  if (get_bits_long(gb, 32) != DCA_SYNCWORD_CORE_BE)
95 
96  h->normal_frame = get_bits1(gb);
97  h->deficit_samples = get_bits(gb, 5) + 1;
98  if (h->deficit_samples != DCA_PCMBLOCK_SAMPLES)
100 
101  h->crc_present = get_bits1(gb);
102  h->npcmblocks = get_bits(gb, 7) + 1;
103  if (h->npcmblocks & (DCA_SUBBAND_SAMPLES - 1))
105 
106  h->frame_size = get_bits(gb, 14) + 1;
107  if (h->frame_size < 96)
109 
110  h->audio_mode = get_bits(gb, 6);
111  if (h->audio_mode >= DCA_AMODE_COUNT)
112  return DCA_PARSE_ERROR_AMODE;
113 
114  h->sr_code = get_bits(gb, 4);
115  if (!avpriv_dca_sample_rates[h->sr_code])
117 
118  h->br_code = get_bits(gb, 5);
119  if (get_bits1(gb))
121 
122  h->drc_present = get_bits1(gb);
123  h->ts_present = get_bits1(gb);
124  h->aux_present = get_bits1(gb);
125  h->hdcd_master = get_bits1(gb);
126  h->ext_audio_type = get_bits(gb, 3);
127  h->ext_audio_present = get_bits1(gb);
128  h->sync_ssf = get_bits1(gb);
129  h->lfe_present = get_bits(gb, 2);
130  if (h->lfe_present == DCA_LFE_FLAG_INVALID)
132 
133  h->predictor_history = get_bits1(gb);
134  if (h->crc_present)
135  skip_bits(gb, 16);
136  h->filter_perfect = get_bits1(gb);
137  h->encoder_rev = get_bits(gb, 4);
138  h->copy_hist = get_bits(gb, 2);
139  h->pcmr_code = get_bits(gb, 3);
140  if (!ff_dca_bits_per_sample[h->pcmr_code])
142 
143  h->sumdiff_front = get_bits1(gb);
144  h->sumdiff_surround = get_bits1(gb);
145  h->dn_code = get_bits(gb, 4);
146  return 0;
147 }
148 
150 {
151  GetBitContext gb;
152  int ret;
153 
154  ret = init_get_bits8(&gb, buf, size);
155  if (ret < 0)
156  return ret;
157 
158  if (ff_dca_parse_core_frame_header(h, &gb) < 0)
159  return AVERROR_INVALIDDATA;
160 
161  return 0;
162 }
DCA_LFE_FLAG_INVALID
@ DCA_LFE_FLAG_INVALID
Definition: dca_core.h:84
put_bytes_output
static int put_bytes_output(const PutBitContext *s)
Definition: put_bits.h:88
dca.h
get_bits_long
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:547
init_put_bits
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:61
DCA_SYNCWORD_CORE_14B_BE
#define DCA_SYNCWORD_CORE_14B_BE
Definition: dca_syncwords.h:24
put_bits
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:220
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:26
DCA_SUBBAND_SAMPLES
#define DCA_SUBBAND_SAMPLES
Definition: dca_core.h:45
skip_bits
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:468
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:380
avpriv_dca_convert_bitstream
int avpriv_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst, int max_size)
Convert bitstream to one representation based on sync marker.
Definition: dca.c:54
DCA_PARSE_ERROR_FRAME_SIZE
@ DCA_PARSE_ERROR_FRAME_SIZE
Definition: dca.h:43
GetBitContext
Definition: get_bits.h:62
dca_core.h
init_get_bits8
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:678
DCA_PARSE_ERROR_PCM_RES
@ DCA_PARSE_ERROR_PCM_RES
Definition: dca.h:48
get_bits.h
AV_RL16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:94
PutBitContext
Definition: put_bits.h:49
dca_syncwords.h
AV_WB16
#define AV_WB16(p, v)
Definition: intreadwrite.h:405
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:499
src
#define src
Definition: vp8dsp.c:255
error.h
DCA_SYNCWORD_CORE_BE
#define DCA_SYNCWORD_CORE_BE
Definition: dca_syncwords.h:22
DCACoreFrameHeader
Definition: dca.h:51
DCA_PARSE_ERROR_SYNC_WORD
@ DCA_PARSE_ERROR_SYNC_WORD
Definition: dca.h:40
size
int size
Definition: twinvq_data.h:10344
AV_RB32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:96
DCA_SYNCWORD_CORE_14B_LE
#define DCA_SYNCWORD_CORE_14B_LE
Definition: dca_syncwords.h:25
DCA_PARSE_ERROR_DEFICIT_SAMPLES
@ DCA_PARSE_ERROR_DEFICIT_SAMPLES
Definition: dca.h:41
ff_dca_parse_core_frame_header
int ff_dca_parse_core_frame_header(DCACoreFrameHeader *h, GetBitContext *gb)
Parse and validate core frame header.
Definition: dca.c:91
i
int i
Definition: input.c:406
DCA_SYNCWORD_SUBSTREAM
#define DCA_SYNCWORD_SUBSTREAM
Definition: dca_syncwords.h:32
DCA_PCMBLOCK_SAMPLES
#define DCA_PCMBLOCK_SAMPLES
Definition: dca_core.h:46
ret
ret
Definition: filter_design.txt:187
ff_dca_bits_per_sample
const uint8_t ff_dca_bits_per_sample[8]
Definition: dca.c:50
DCA_AMODE_COUNT
@ DCA_AMODE_COUNT
Definition: dca_core.h:71
DCA_PARSE_ERROR_PCM_BLOCKS
@ DCA_PARSE_ERROR_PCM_BLOCKS
Definition: dca.h:42
ff_dca_sampling_freqs
const uint32_t ff_dca_sampling_freqs[16]
Definition: dca.c:41
DCA_PARSE_ERROR_LFE_FLAG
@ DCA_PARSE_ERROR_LFE_FLAG
Definition: dca.h:47
DCA_PARSE_ERROR_SAMPLE_RATE
@ DCA_PARSE_ERROR_SAMPLE_RATE
Definition: dca.h:45
DCA_SYNCWORD_CORE_LE
#define DCA_SYNCWORD_CORE_LE
Definition: dca_syncwords.h:23
avpriv_dca_parse_core_frame_header
int avpriv_dca_parse_core_frame_header(DCACoreFrameHeader *h, const uint8_t *buf, int size)
Parse and validate core frame header.
Definition: dca.c:149
DCA_PARSE_ERROR_RESERVED_BIT
@ DCA_PARSE_ERROR_RESERVED_BIT
Definition: dca.h:46
ff_dca_freq_ranges
const uint8_t ff_dca_freq_ranges[16]
Definition: dca.c:46
flush_put_bits
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:142
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
h
h
Definition: vp9dsp_template.c:2038
avpriv_dca_sample_rates
const uint32_t avpriv_dca_sample_rates[16]
Definition: dca.c:36
put_bits.h
AV_RB16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:98
DCA_PARSE_ERROR_AMODE
@ DCA_PARSE_ERROR_AMODE
Definition: dca.h:44