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FFmpeg/libavcodec/dca.h
James Almer 7c9d2ad45f avcodec/dca: remove GetBitContext usage from avpriv_dca_parse_core_frame_header() 
This prevents potential ABI issues with GetBitContext.

Reviewed-by: foo86 <foobaz86@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
2017-07-21 12:18:10 -03:00

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/*
* DCA compatible decoder
* Copyright (C) 2004 Gildas Bazin
* Copyright (C) 2004 Benjamin Zores
* Copyright (C) 2006 Benjamin Larsson
* Copyright (C) 2007 Konstantin Shishkov
* Copyright (C) 2016 foo86
*
* 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 2.1 of the License, or (at your option) any later version.
*
* 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_DCA_H
#define AVCODEC_DCA_H
#include <stdint.h>
#include "libavutil/common.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "get_bits.h"
#define DCA_CORE_FRAME_HEADER_SIZE 18
enum DCAParseError {
DCA_PARSE_ERROR_SYNC_WORD = -1,
DCA_PARSE_ERROR_DEFICIT_SAMPLES = -2,
DCA_PARSE_ERROR_PCM_BLOCKS = -3,
DCA_PARSE_ERROR_FRAME_SIZE = -4,
DCA_PARSE_ERROR_AMODE = -5,
DCA_PARSE_ERROR_SAMPLE_RATE = -6,
DCA_PARSE_ERROR_RESERVED_BIT = -7,
DCA_PARSE_ERROR_LFE_FLAG = -8,
DCA_PARSE_ERROR_PCM_RES = -9,
DCA_PARSE_ERROR_INVALIDDATA = -10,
};
typedef struct DCACoreFrameHeader {
uint8_t normal_frame; ///< Frame type
uint8_t deficit_samples; ///< Deficit sample count
uint8_t crc_present; ///< CRC present flag
uint8_t npcmblocks; ///< Number of PCM sample blocks
uint16_t frame_size; ///< Primary frame byte size
uint8_t audio_mode; ///< Audio channel arrangement
uint8_t sr_code; ///< Core audio sampling frequency
uint8_t br_code; ///< Transmission bit rate
uint8_t drc_present; ///< Embedded dynamic range flag
uint8_t ts_present; ///< Embedded time stamp flag
uint8_t aux_present; ///< Auxiliary data flag
uint8_t hdcd_master; ///< HDCD mastering flag
uint8_t ext_audio_type; ///< Extension audio descriptor flag
uint8_t ext_audio_present; ///< Extended coding flag
uint8_t sync_ssf; ///< Audio sync word insertion flag
uint8_t lfe_present; ///< Low frequency effects flag
uint8_t predictor_history; ///< Predictor history flag switch
uint8_t filter_perfect; ///< Multirate interpolator switch
uint8_t encoder_rev; ///< Encoder software revision
uint8_t copy_hist; ///< Copy history
uint8_t pcmr_code; ///< Source PCM resolution
uint8_t sumdiff_front; ///< Front sum/difference flag
uint8_t sumdiff_surround; ///< Surround sum/difference flag
uint8_t dn_code; ///< Dialog normalization / unspecified
} DCACoreFrameHeader;
enum DCASpeaker {
DCA_SPEAKER_C, DCA_SPEAKER_L, DCA_SPEAKER_R, DCA_SPEAKER_Ls,
DCA_SPEAKER_Rs, DCA_SPEAKER_LFE1, DCA_SPEAKER_Cs, DCA_SPEAKER_Lsr,
DCA_SPEAKER_Rsr, DCA_SPEAKER_Lss, DCA_SPEAKER_Rss, DCA_SPEAKER_Lc,
DCA_SPEAKER_Rc, DCA_SPEAKER_Lh, DCA_SPEAKER_Ch, DCA_SPEAKER_Rh,
DCA_SPEAKER_LFE2, DCA_SPEAKER_Lw, DCA_SPEAKER_Rw, DCA_SPEAKER_Oh,
DCA_SPEAKER_Lhs, DCA_SPEAKER_Rhs, DCA_SPEAKER_Chr, DCA_SPEAKER_Lhr,
DCA_SPEAKER_Rhr, DCA_SPEAKER_Cl, DCA_SPEAKER_Ll, DCA_SPEAKER_Rl,
DCA_SPEAKER_RSV1, DCA_SPEAKER_RSV2, DCA_SPEAKER_RSV3, DCA_SPEAKER_RSV4,
DCA_SPEAKER_COUNT
};
enum DCASpeakerMask {
DCA_SPEAKER_MASK_C = 0x00000001,
DCA_SPEAKER_MASK_L = 0x00000002,
DCA_SPEAKER_MASK_R = 0x00000004,
DCA_SPEAKER_MASK_Ls = 0x00000008,
DCA_SPEAKER_MASK_Rs = 0x00000010,
DCA_SPEAKER_MASK_LFE1 = 0x00000020,
DCA_SPEAKER_MASK_Cs = 0x00000040,
DCA_SPEAKER_MASK_Lsr = 0x00000080,
DCA_SPEAKER_MASK_Rsr = 0x00000100,
DCA_SPEAKER_MASK_Lss = 0x00000200,
DCA_SPEAKER_MASK_Rss = 0x00000400,
DCA_SPEAKER_MASK_Lc = 0x00000800,
DCA_SPEAKER_MASK_Rc = 0x00001000,
DCA_SPEAKER_MASK_Lh = 0x00002000,
DCA_SPEAKER_MASK_Ch = 0x00004000,
DCA_SPEAKER_MASK_Rh = 0x00008000,
DCA_SPEAKER_MASK_LFE2 = 0x00010000,
DCA_SPEAKER_MASK_Lw = 0x00020000,
DCA_SPEAKER_MASK_Rw = 0x00040000,
DCA_SPEAKER_MASK_Oh = 0x00080000,
DCA_SPEAKER_MASK_Lhs = 0x00100000,
DCA_SPEAKER_MASK_Rhs = 0x00200000,
DCA_SPEAKER_MASK_Chr = 0x00400000,
DCA_SPEAKER_MASK_Lhr = 0x00800000,
DCA_SPEAKER_MASK_Rhr = 0x01000000,
DCA_SPEAKER_MASK_Cl = 0x02000000,
DCA_SPEAKER_MASK_Ll = 0x04000000,
DCA_SPEAKER_MASK_Rl = 0x08000000,
};
#define DCA_SPEAKER_LAYOUT_MONO (DCA_SPEAKER_MASK_C)
#define DCA_SPEAKER_LAYOUT_STEREO (DCA_SPEAKER_MASK_L | DCA_SPEAKER_MASK_R)
#define DCA_SPEAKER_LAYOUT_2POINT1 (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_LFE1)
#define DCA_SPEAKER_LAYOUT_3_0 (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_C)
#define DCA_SPEAKER_LAYOUT_2_1 (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_Cs)
#define DCA_SPEAKER_LAYOUT_3_1 (DCA_SPEAKER_LAYOUT_3_0 | DCA_SPEAKER_MASK_Cs)
#define DCA_SPEAKER_LAYOUT_2_2 (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_Ls | DCA_SPEAKER_MASK_Rs)
#define DCA_SPEAKER_LAYOUT_5POINT0 (DCA_SPEAKER_LAYOUT_3_0 | DCA_SPEAKER_MASK_Ls | DCA_SPEAKER_MASK_Rs)
#define DCA_SPEAKER_LAYOUT_5POINT1 (DCA_SPEAKER_LAYOUT_5POINT0 | DCA_SPEAKER_MASK_LFE1)
#define DCA_SPEAKER_LAYOUT_7POINT0_WIDE (DCA_SPEAKER_LAYOUT_5POINT0 | DCA_SPEAKER_MASK_Lw | DCA_SPEAKER_MASK_Rw)
#define DCA_SPEAKER_LAYOUT_7POINT1_WIDE (DCA_SPEAKER_LAYOUT_7POINT0_WIDE | DCA_SPEAKER_MASK_LFE1)
#define DCA_HAS_STEREO(mask) \
((mask & DCA_SPEAKER_LAYOUT_STEREO) == DCA_SPEAKER_LAYOUT_STEREO)
enum DCASpeakerPair {
DCA_SPEAKER_PAIR_C = 0x0001,
DCA_SPEAKER_PAIR_LR = 0x0002,
DCA_SPEAKER_PAIR_LsRs = 0x0004,
DCA_SPEAKER_PAIR_LFE1 = 0x0008,
DCA_SPEAKER_PAIR_Cs = 0x0010,
DCA_SPEAKER_PAIR_LhRh = 0x0020,
DCA_SPEAKER_PAIR_LsrRsr = 0x0040,
DCA_SPEAKER_PAIR_Ch = 0x0080,
DCA_SPEAKER_PAIR_Oh = 0x0100,
DCA_SPEAKER_PAIR_LcRc = 0x0200,
DCA_SPEAKER_PAIR_LwRw = 0x0400,
DCA_SPEAKER_PAIR_LssRss = 0x0800,
DCA_SPEAKER_PAIR_LFE2 = 0x1000,
DCA_SPEAKER_PAIR_LhsRhs = 0x2000,
DCA_SPEAKER_PAIR_Chr = 0x4000,
DCA_SPEAKER_PAIR_LhrRhr = 0x8000
};
/**
* Return number of individual channels in DCASpeakerPair mask
*/
static inline int ff_dca_count_chs_for_mask(unsigned int mask)
{
return av_popcount((mask & 0xffff) | ((mask & 0xae66) << 16));
}
enum DCARepresentationType {
DCA_REPR_TYPE_LtRt = 2,
DCA_REPR_TYPE_LhRh = 3
};
enum DCAExtensionMask {
DCA_CSS_CORE = 0x001,
DCA_CSS_XXCH = 0x002,
DCA_CSS_X96 = 0x004,
DCA_CSS_XCH = 0x008,
DCA_CSS_MASK = 0x00f,
DCA_EXSS_CORE = 0x010,
DCA_EXSS_XBR = 0x020,
DCA_EXSS_XXCH = 0x040,
DCA_EXSS_X96 = 0x080,
DCA_EXSS_LBR = 0x100,
DCA_EXSS_XLL = 0x200,
DCA_EXSS_RSV1 = 0x400,
DCA_EXSS_RSV2 = 0x800,
DCA_EXSS_MASK = 0xff0,
};
enum DCADownMixType {
DCA_DMIX_TYPE_1_0,
DCA_DMIX_TYPE_LoRo,
DCA_DMIX_TYPE_LtRt,
DCA_DMIX_TYPE_3_0,
DCA_DMIX_TYPE_2_1,
DCA_DMIX_TYPE_2_2,
DCA_DMIX_TYPE_3_1,
DCA_DMIX_TYPE_COUNT
};
extern av_export const uint32_t avpriv_dca_sample_rates[16];
extern const uint32_t ff_dca_sampling_freqs[16];
extern const uint8_t ff_dca_freq_ranges[16];
extern const uint8_t ff_dca_bits_per_sample[8];
/**
* Convert bitstream to one representation based on sync marker
*/
int avpriv_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst,
int max_size);
/**
* Parse and validate core frame header
* @return 0 on success, negative DCA_PARSE_ERROR_ code on failure
*/
int avpriv_dca_parse_core_frame_header(DCACoreFrameHeader *h, uint8_t *buf, int size);
int ff_dca_parse_core_frame_header(DCACoreFrameHeader *h, GetBitContext *gb);
#endif /* AVCODEC_DCA_H */
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