| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (C) 2016 foo86 | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg is free software; you can redistribute it and/or | ||
| 7 | * modify it under the terms of the GNU Lesser General Public | ||
| 8 | * License as published by the Free Software Foundation; either | ||
| 9 | * version 2.1 of the License, or (at your option) any later version. | ||
| 10 | * | ||
| 11 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 14 | * Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public | ||
| 17 | * License along with FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | #ifndef AVCODEC_DCADEC_H | ||
| 22 | #define AVCODEC_DCADEC_H | ||
| 23 | |||
| 24 | #include <stdint.h> | ||
| 25 | |||
| 26 | #include "libavutil/crc.h" | ||
| 27 | #include "libavutil/float_dsp.h" | ||
| 28 | #include "libavutil/log.h" | ||
| 29 | |||
| 30 | #include "avcodec.h" | ||
| 31 | #include "get_bits.h" | ||
| 32 | #include "dca.h" | ||
| 33 | #include "dcadsp.h" | ||
| 34 | #include "dca_core.h" | ||
| 35 | #include "dca_exss.h" | ||
| 36 | #include "dca_xll.h" | ||
| 37 | #include "dca_lbr.h" | ||
| 38 | |||
| 39 | #define DCA_PACKET_CORE 0x01 | ||
| 40 | #define DCA_PACKET_EXSS 0x02 | ||
| 41 | #define DCA_PACKET_XLL 0x04 | ||
| 42 | #define DCA_PACKET_LBR 0x08 | ||
| 43 | #define DCA_PACKET_MASK 0x0f | ||
| 44 | |||
| 45 | #define DCA_PACKET_RECOVERY 0x10 ///< Sync error recovery flag | ||
| 46 | #define DCA_PACKET_RESIDUAL 0x20 ///< Core valid for residual decoding | ||
| 47 | |||
| 48 | enum DCAOutputChannelOrder { | ||
| 49 | CHANNEL_ORDER_DEFAULT, | ||
| 50 | CHANNEL_ORDER_CODED, | ||
| 51 | }; | ||
| 52 | |||
| 53 | typedef struct DCAContext { | ||
| 54 | const AVClass *class; ///< class for AVOptions | ||
| 55 | AVCodecContext *avctx; | ||
| 56 | |||
| 57 | DCACoreDecoder core; ///< Core decoder context | ||
| 58 | DCAExssParser exss; ///< EXSS parser context | ||
| 59 | DCAXllDecoder xll; ///< XLL decoder context | ||
| 60 | DCALbrDecoder lbr; ///< LBR decoder context | ||
| 61 | |||
| 62 | DCADSPContext dcadsp; | ||
| 63 | |||
| 64 | const AVCRC *crctab; | ||
| 65 | |||
| 66 | uint8_t *buffer; ///< Packet buffer | ||
| 67 | unsigned int buffer_size; | ||
| 68 | |||
| 69 | int packet; ///< Packet flags | ||
| 70 | |||
| 71 | int request_channel_layout; ///< Converted from avctx.request_channel_layout | ||
| 72 | int core_only; ///< Core only decoding flag | ||
| 73 | int output_channel_order; | ||
| 74 | AVChannelLayout downmix_layout; | ||
| 75 | } DCAContext; | ||
| 76 | |||
| 77 | int ff_dca_set_channel_layout(AVCodecContext *avctx, int *ch_remap, int dca_mask); | ||
| 78 | |||
| 79 | void ff_dca_downmix_to_stereo_fixed(DCADSPContext *dcadsp, int32_t **samples, | ||
| 80 | int *coeff_l, int nsamples, int ch_mask); | ||
| 81 | void ff_dca_downmix_to_stereo_float(AVFloatDSPContext *fdsp, float **samples, | ||
| 82 | int *coeff_l, int nsamples, int ch_mask); | ||
| 83 | |||
| 84 | 6997 | static inline int ff_dca_check_crc(AVCodecContext *avctx, GetBitContext *s, | |
| 85 | int p1, int p2) | ||
| 86 | { | ||
| 87 | 6997 | DCAContext *dca = avctx->priv_data; | |
| 88 | |||
| 89 |
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6997 | if (!(avctx->err_recognition & (AV_EF_CRCCHECK | AV_EF_CAREFUL))) |
| 90 | 6997 | return 0; | |
| 91 | ✗ | if (((p1 | p2) & 7) || p1 < 0 || p2 > s->size_in_bits || p2 - p1 < 16) | |
| 92 | ✗ | return -1; | |
| 93 | ✗ | if (av_crc(dca->crctab, 0xffff, s->buffer + p1 / 8, (p2 - p1) / 8)) | |
| 94 | ✗ | return -1; | |
| 95 | ✗ | return 0; | |
| 96 | } | ||
| 97 | |||
| 98 | 19571 | static inline int ff_dca_seek_bits(GetBitContext *s, int p) | |
| 99 | { | ||
| 100 |
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19571 | if (p < get_bits_count(s) || p > s->size_in_bits) |
| 101 | ✗ | return -1; | |
| 102 | 19571 | skip_bits_long(s, p - get_bits_count(s)); | |
| 103 | 19571 | return 0; | |
| 104 | } | ||
| 105 | |||
| 106 | #endif | ||
| 107 |