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dca.h
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1 /*
2  * DCA compatible decoder
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  * Copyright (C) 2016 foo86
8  *
9  * This file is part of FFmpeg.
10  *
11  * FFmpeg is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU Lesser General Public
13  * License as published by the Free Software Foundation; either
14  * version 2.1 of the License, or (at your option) any later version.
15  *
16  * FFmpeg is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19  * Lesser General Public License for more details.
20  *
21  * You should have received a copy of the GNU Lesser General Public
22  * License along with FFmpeg; if not, write to the Free Software
23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24  */
25 
26 #ifndef AVCODEC_DCA_H
27 #define AVCODEC_DCA_H
28 
29 #include <stdint.h>
30 
31 #include "libavutil/common.h"
32 #include "libavutil/intreadwrite.h"
33 
34 #include "get_bits.h"
35 #include "internal.h"
36 
37 #define DCA_CORE_FRAME_HEADER_SIZE 18
38 
49 };
50 
51 typedef struct DCACoreFrameHeader {
52  uint8_t normal_frame; ///< Frame type
53  uint8_t deficit_samples; ///< Deficit sample count
54  uint8_t crc_present; ///< CRC present flag
55  uint8_t npcmblocks; ///< Number of PCM sample blocks
56  uint16_t frame_size; ///< Primary frame byte size
57  uint8_t audio_mode; ///< Audio channel arrangement
58  uint8_t sr_code; ///< Core audio sampling frequency
59  uint8_t br_code; ///< Transmission bit rate
60  uint8_t drc_present; ///< Embedded dynamic range flag
61  uint8_t ts_present; ///< Embedded time stamp flag
62  uint8_t aux_present; ///< Auxiliary data flag
63  uint8_t hdcd_master; ///< HDCD mastering flag
64  uint8_t ext_audio_type; ///< Extension audio descriptor flag
65  uint8_t ext_audio_present; ///< Extended coding flag
66  uint8_t sync_ssf; ///< Audio sync word insertion flag
67  uint8_t lfe_present; ///< Low frequency effects flag
68  uint8_t predictor_history; ///< Predictor history flag switch
69  uint8_t filter_perfect; ///< Multirate interpolator switch
70  uint8_t encoder_rev; ///< Encoder software revision
71  uint8_t copy_hist; ///< Copy history
72  uint8_t pcmr_code; ///< Source PCM resolution
73  uint8_t sumdiff_front; ///< Front sum/difference flag
74  uint8_t sumdiff_surround; ///< Surround sum/difference flag
75  uint8_t dn_code; ///< Dialog normalization / unspecified
77 
78 enum DCASpeaker {
87 
89 };
90 
92  DCA_SPEAKER_MASK_C = 0x00000001,
93  DCA_SPEAKER_MASK_L = 0x00000002,
94  DCA_SPEAKER_MASK_R = 0x00000004,
95  DCA_SPEAKER_MASK_Ls = 0x00000008,
96  DCA_SPEAKER_MASK_Rs = 0x00000010,
97  DCA_SPEAKER_MASK_LFE1 = 0x00000020,
98  DCA_SPEAKER_MASK_Cs = 0x00000040,
99  DCA_SPEAKER_MASK_Lsr = 0x00000080,
100  DCA_SPEAKER_MASK_Rsr = 0x00000100,
101  DCA_SPEAKER_MASK_Lss = 0x00000200,
102  DCA_SPEAKER_MASK_Rss = 0x00000400,
103  DCA_SPEAKER_MASK_Lc = 0x00000800,
104  DCA_SPEAKER_MASK_Rc = 0x00001000,
105  DCA_SPEAKER_MASK_Lh = 0x00002000,
106  DCA_SPEAKER_MASK_Ch = 0x00004000,
107  DCA_SPEAKER_MASK_Rh = 0x00008000,
108  DCA_SPEAKER_MASK_LFE2 = 0x00010000,
109  DCA_SPEAKER_MASK_Lw = 0x00020000,
110  DCA_SPEAKER_MASK_Rw = 0x00040000,
111  DCA_SPEAKER_MASK_Oh = 0x00080000,
112  DCA_SPEAKER_MASK_Lhs = 0x00100000,
113  DCA_SPEAKER_MASK_Rhs = 0x00200000,
114  DCA_SPEAKER_MASK_Chr = 0x00400000,
115  DCA_SPEAKER_MASK_Lhr = 0x00800000,
116  DCA_SPEAKER_MASK_Rhr = 0x01000000,
117  DCA_SPEAKER_MASK_Cl = 0x02000000,
118  DCA_SPEAKER_MASK_Ll = 0x04000000,
119  DCA_SPEAKER_MASK_Rl = 0x08000000,
120 };
121 
122 #define DCA_SPEAKER_LAYOUT_MONO (DCA_SPEAKER_MASK_C)
123 #define DCA_SPEAKER_LAYOUT_STEREO (DCA_SPEAKER_MASK_L | DCA_SPEAKER_MASK_R)
124 #define DCA_SPEAKER_LAYOUT_2POINT1 (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_LFE1)
125 #define DCA_SPEAKER_LAYOUT_3_0 (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_C)
126 #define DCA_SPEAKER_LAYOUT_2_1 (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_Cs)
127 #define DCA_SPEAKER_LAYOUT_3_1 (DCA_SPEAKER_LAYOUT_3_0 | DCA_SPEAKER_MASK_Cs)
128 #define DCA_SPEAKER_LAYOUT_2_2 (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_Ls | DCA_SPEAKER_MASK_Rs)
129 #define DCA_SPEAKER_LAYOUT_5POINT0 (DCA_SPEAKER_LAYOUT_3_0 | DCA_SPEAKER_MASK_Ls | DCA_SPEAKER_MASK_Rs)
130 #define DCA_SPEAKER_LAYOUT_5POINT1 (DCA_SPEAKER_LAYOUT_5POINT0 | DCA_SPEAKER_MASK_LFE1)
131 #define DCA_SPEAKER_LAYOUT_7POINT0_WIDE (DCA_SPEAKER_LAYOUT_5POINT0 | DCA_SPEAKER_MASK_Lw | DCA_SPEAKER_MASK_Rw)
132 #define DCA_SPEAKER_LAYOUT_7POINT1_WIDE (DCA_SPEAKER_LAYOUT_7POINT0_WIDE | DCA_SPEAKER_MASK_LFE1)
133 
134 #define DCA_HAS_STEREO(mask) \
135  ((mask & DCA_SPEAKER_LAYOUT_STEREO) == DCA_SPEAKER_LAYOUT_STEREO)
136 
154 };
155 
156 /**
157  * Return number of individual channels in DCASpeakerPair mask
158  */
159 static inline int ff_dca_count_chs_for_mask(unsigned int mask)
160 {
161  return av_popcount((mask & 0xffff) | ((mask & 0xae66) << 16));
162 }
163 
167 };
168 
170  DCA_CSS_CORE = 0x001,
171  DCA_CSS_XXCH = 0x002,
172  DCA_CSS_X96 = 0x004,
173  DCA_CSS_XCH = 0x008,
174  DCA_CSS_MASK = 0x00f,
175  DCA_EXSS_CORE = 0x010,
176  DCA_EXSS_XBR = 0x020,
177  DCA_EXSS_XXCH = 0x040,
178  DCA_EXSS_X96 = 0x080,
179  DCA_EXSS_LBR = 0x100,
180  DCA_EXSS_XLL = 0x200,
181  DCA_EXSS_RSV1 = 0x400,
182  DCA_EXSS_RSV2 = 0x800,
183  DCA_EXSS_MASK = 0xff0,
184 };
185 
194 
196 };
197 
198 extern av_export_avcodec const uint32_t avpriv_dca_sample_rates[16];
199 
200 extern const uint32_t ff_dca_sampling_freqs[16];
201 extern const uint8_t ff_dca_freq_ranges[16];
202 extern const uint8_t ff_dca_bits_per_sample[8];
203 
204 
205 /**
206  * Convert bitstream to one representation based on sync marker
207  */
208 int avpriv_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst,
209  int max_size);
210 
211 /**
212  * Parse and validate core frame header
213  * @param[out] h Pointer to struct where header info is written.
214  * @param[in] buf Pointer to the data buffer
215  * @param[in] size Size of the data buffer
216  * @return 0 on success, negative AVERROR code on failure
217  */
219 
220 /**
221  * Parse and validate core frame header
222  * @param[out] h Pointer to struct where header info is written.
223  * @param[in] gbc BitContext containing the first 120 bits of the frame.
224  * @return 0 on success, negative DCA_PARSE_ERROR_ code on failure
225  */
227 
228 #endif /* AVCODEC_DCA_H */
uint8_t sumdiff_surround
Surround sum/difference flag.
Definition: dca.h:74
DCASpeaker
Definition: dca.h:78
av_export_avcodec const uint32_t avpriv_dca_sample_rates[16]
Definition: dca.c:36
uint8_t npcmblocks
Number of PCM sample blocks.
Definition: dca.h:55
uint8_t hdcd_master
HDCD mastering flag.
Definition: dca.h:63
DCARepresentationType
Definition: dca.h:164
uint8_t copy_hist
Copy history.
Definition: dca.h:71
#define src
Definition: vp8dsp.c:254
uint8_t encoder_rev
Encoder software revision.
Definition: dca.h:70
uint8_t aux_present
Auxiliary data flag.
Definition: dca.h:62
uint8_t
DCASpeakerPair
Definition: dca.h:137
bitstream reader API header.
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
uint8_t pcmr_code
Source PCM resolution.
Definition: dca.h:72
ptrdiff_t size
Definition: opengl_enc.c:101
uint8_t crc_present
CRC present flag.
Definition: dca.h:54
uint8_t ext_audio_type
Extension audio descriptor flag.
Definition: dca.h:64
uint8_t predictor_history
Predictor history flag switch.
Definition: dca.h:68
static const uint16_t mask[17]
Definition: lzw.c:38
#define av_export_avcodec
Definition: internal.h:420
const uint8_t ff_dca_freq_ranges[16]
Definition: dca.c:46
DCAParseError
Definition: dca.h:39
uint8_t lfe_present
Low frequency effects flag.
Definition: dca.h:67
uint8_t normal_frame
Frame type.
Definition: dca.h:52
uint8_t audio_mode
Audio channel arrangement.
Definition: dca.h:57
const uint8_t ff_dca_bits_per_sample[8]
Definition: dca.c:50
uint8_t br_code
Transmission bit rate.
Definition: dca.h:59
int ff_dca_parse_core_frame_header(DCACoreFrameHeader *h, GetBitContext *gb)
Parse and validate core frame header.
Definition: dca.c:91
uint8_t deficit_samples
Deficit sample count.
Definition: dca.h:53
void * buf
Definition: avisynth_c.h:690
uint8_t dn_code
Dialog normalization / unspecified.
Definition: dca.h:75
uint8_t ts_present
Embedded time stamp flag.
Definition: dca.h:61
uint16_t frame_size
Primary frame byte size.
Definition: dca.h:56
static int ff_dca_count_chs_for_mask(unsigned int mask)
Return number of individual channels in DCASpeakerPair mask.
Definition: dca.h:159
uint8_t sync_ssf
Audio sync word insertion flag.
Definition: dca.h:66
uint8_t sr_code
Core audio sampling frequency.
Definition: dca.h:58
common internal api header.
common internal and external API header
DCAExtensionMask
Definition: dca.h:169
uint8_t drc_present
Embedded dynamic range flag.
Definition: dca.h:60
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
const uint32_t ff_dca_sampling_freqs[16]
Definition: dca.c:41
uint8_t filter_perfect
Multirate interpolator switch.
Definition: dca.h:69
DCADownMixType
Definition: dca.h:186
DCASpeakerMask
Definition: dca.h:91
uint8_t ext_audio_present
Extended coding flag.
Definition: dca.h:65
uint8_t sumdiff_front
Front sum/difference flag.
Definition: dca.h:73