2 * Copyright (C) 2016 foo86
4 * This file is part of FFmpeg.
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.
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.
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
21 #ifndef AVCODEC_DCADEC_H
22 #define AVCODEC_DCADEC_H
24 #include "libavutil/common.h"
25 #include "libavutil/float_dsp.h"
35 #define DCA_BUFFER_PADDING_SIZE 1024
37 #define DCA_PACKET_CORE 0x01
38 #define DCA_PACKET_EXSS 0x02
39 #define DCA_PACKET_XLL 0x04
40 #define DCA_PACKET_RECOVERY 0x08
42 typedef struct DCAContext {
43 const AVClass *class; ///< class for AVOptions
44 AVCodecContext *avctx;
46 DCACoreDecoder core; ///< Core decoder context
47 DCAExssParser exss; ///< EXSS parser context
48 DCAXllDecoder xll; ///< XLL decoder context
52 uint8_t *buffer; ///< Packet buffer
53 unsigned int buffer_size;
55 int packet; ///< Packet flags
57 int core_residual_valid; ///< Core valid for residual decoding
59 int request_channel_layout; ///< Converted from avctx.request_channel_layout
60 int core_only; ///< Core only decoding flag
63 int ff_dca_set_channel_layout(AVCodecContext *avctx, int *ch_remap, int dca_mask);
65 int ff_dca_check_crc(GetBitContext *s, int p1, int p2);
67 void ff_dca_downmix_to_stereo_fixed(DCADSPContext *dcadsp, int32_t **samples,
68 int *coeff_l, int nsamples, int ch_mask);
69 void ff_dca_downmix_to_stereo_float(AVFloatDSPContext *fdsp, float **samples,
70 int *coeff_l, int nsamples, int ch_mask);
72 static inline int ff_dca_seek_bits(GetBitContext *s, int p)
74 if (p < s->index || p > s->size_in_bits)