LCOV - code coverage report
Current view: top level - libavcodec - dcadec.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 8 14 57.1 %
Date: 2017-12-16 21:16:39 Functions: 2 2 100.0 %

          Line data    Source code
       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 "libavutil/common.h"
      25             : #include "libavutil/crc.h"
      26             : #include "libavutil/float_dsp.h"
      27             : 
      28             : #include "avcodec.h"
      29             : #include "get_bits.h"
      30             : #include "dca.h"
      31             : #include "dcadsp.h"
      32             : #include "dca_core.h"
      33             : #include "dca_exss.h"
      34             : #include "dca_xll.h"
      35             : #include "dca_lbr.h"
      36             : 
      37             : #define DCA_PACKET_CORE         0x01
      38             : #define DCA_PACKET_EXSS         0x02
      39             : #define DCA_PACKET_XLL          0x04
      40             : #define DCA_PACKET_LBR          0x08
      41             : #define DCA_PACKET_MASK         0x0f
      42             : 
      43             : #define DCA_PACKET_RECOVERY     0x10    ///< Sync error recovery flag
      44             : #define DCA_PACKET_RESIDUAL     0x20    ///< Core valid for residual decoding
      45             : 
      46             : typedef struct DCAContext {
      47             :     const AVClass   *class;       ///< class for AVOptions
      48             :     AVCodecContext  *avctx;
      49             : 
      50             :     DCACoreDecoder core;  ///< Core decoder context
      51             :     DCAExssParser  exss;  ///< EXSS parser context
      52             :     DCAXllDecoder  xll;   ///< XLL decoder context
      53             :     DCALbrDecoder  lbr;   ///< LBR decoder context
      54             : 
      55             :     DCADSPContext   dcadsp;
      56             : 
      57             :     const AVCRC     *crctab;
      58             : 
      59             :     uint8_t         *buffer;    ///< Packet buffer
      60             :     unsigned int    buffer_size;
      61             : 
      62             :     int     packet; ///< Packet flags
      63             : 
      64             :     int     request_channel_layout; ///< Converted from avctx.request_channel_layout
      65             :     int     core_only;              ///< Core only decoding flag
      66             : } DCAContext;
      67             : 
      68             : int ff_dca_set_channel_layout(AVCodecContext *avctx, int *ch_remap, int dca_mask);
      69             : 
      70             : void ff_dca_downmix_to_stereo_fixed(DCADSPContext *dcadsp, int32_t **samples,
      71             :                                     int *coeff_l, int nsamples, int ch_mask);
      72             : void ff_dca_downmix_to_stereo_float(AVFloatDSPContext *fdsp, float **samples,
      73             :                                     int *coeff_l, int nsamples, int ch_mask);
      74             : 
      75        6977 : static inline int ff_dca_check_crc(AVCodecContext *avctx, GetBitContext *s,
      76             :                                    int p1, int p2)
      77             : {
      78        6977 :     DCAContext *dca = avctx->priv_data;
      79             : 
      80        6977 :     if (!(avctx->err_recognition & (AV_EF_CRCCHECK | AV_EF_CAREFUL)))
      81        6977 :         return 0;
      82           0 :     if (((p1 | p2) & 7) || p1 < 0 || p2 > s->size_in_bits || p2 - p1 < 16)
      83           0 :         return -1;
      84           0 :     if (av_crc(dca->crctab, 0xffff, s->buffer + p1 / 8, (p2 - p1) / 8))
      85           0 :         return -1;
      86           0 :     return 0;
      87             : }
      88             : 
      89       19467 : static inline int ff_dca_seek_bits(GetBitContext *s, int p)
      90             : {
      91       19467 :     if (p < get_bits_count(s) || p > s->size_in_bits)
      92           0 :         return -1;
      93       19467 :     skip_bits_long(s, p - get_bits_count(s));
      94       19467 :     return 0;
      95             : }
      96             : 
      97             : #endif

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