/* * 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_DCADEC_H#define AVCODEC_DCADEC_H #include <stdint.h> #include "libavutil/crc.h"#include "libavutil/float_dsp.h"#include "libavutil/log.h" #include "avcodec.h"#include "get_bits.h"#include "dca.h"#include "dcadsp.h"#include "dca_core.h"#include "dca_exss.h"#include "dca_xll.h"#include "dca_lbr.h" #define DCA_PACKET_CORE         0x01#define DCA_PACKET_EXSS         0x02#define DCA_PACKET_XLL          0x04#define DCA_PACKET_LBR          0x08#define DCA_PACKET_MASK         0x0f #define DCA_PACKET_RECOVERY     0x10    ///< Sync error recovery flag#define DCA_PACKET_RESIDUAL     0x20    ///< Core valid for residual decoding enum DCAOutputChannelOrder {    CHANNEL_ORDER_DEFAULT,    CHANNEL_ORDER_CODED,}; typedef struct DCAContext {    const AVClass   *class;       ///< class for AVOptions    AVCodecContext  *avctx;     DCACoreDecoder core;  ///< Core decoder context    DCAExssParser  exss;  ///< EXSS parser context    DCAXllDecoder  xll;   ///< XLL decoder context    DCALbrDecoder  lbr;   ///< LBR decoder context     DCADSPContext   dcadsp;     const AVCRC     *crctab;     uint8_t         *buffer;    ///< Packet buffer    unsigned int    buffer_size;     int     packet; ///< Packet flags     int     request_channel_layout; ///< Converted from avctx.request_channel_layout    int     core_only;              ///< Core only decoding flag    int     output_channel_order;    AVChannelLayout downmix_layout;} DCAContext; int ff_dca_set_channel_layout(AVCodecContext *avctx, int *ch_remap, int dca_mask); void ff_dca_downmix_to_stereo_fixed(DCADSPContext *dcadsp, int32_t **samples,                                    int *coeff_l, int nsamples, int ch_mask);void ff_dca_downmix_to_stereo_float(AVFloatDSPContext *fdsp, float **samples,                                    int *coeff_l, int nsamples, int ch_mask); static inline int ff_dca_check_crc(AVCodecContext *avctx, GetBitContext *s,                                   int p1, int p2){    DCAContext *dca = avctx->priv_data;     if (!(avctx->err_recognition & (AV_EF_CRCCHECK | AV_EF_CAREFUL)))        return 0;    if (((p1 | p2) & 7) || p1 < 0 || p2 > s->size_in_bits || p2 - p1 < 16)        return -1;    if (av_crc(dca->crctab, 0xffff, s->buffer + p1 / 8, (p2 - p1) / 8))        return -1;    return 0;} static inline int ff_dca_seek_bits(GetBitContext *s, int p){    if (p < get_bits_count(s) || p > s->size_in_bits)        return -1;    skip_bits_long(s, p - get_bits_count(s));    return 0;} #endif