mirror of
https://github.com/nyanmisaka/ffmpeg-rockchip.git
synced 2025-10-31 12:36:41 +08:00
107 lines
3.3 KiB
C
107 lines
3.3 KiB
C
/*
|
|
* 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
|