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/*
* MPEG-4 decoder internal header.
* Copyright (c) 2000,2001 Fabrice Bellard
* Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
*
* 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_MPEG4VIDEODEC_H
#define AVCODEC_MPEG4VIDEODEC_H
#include <stdint.h>
#include "get_bits.h"
#include "mpegvideo.h"
#include "mpeg4videodsp.h"
#include "libavutil/mem_internal.h"
typedef struct Mpeg4DecContext {
MpegEncContext m;
/// number of bits to represent the fractional part of time
int time_increment_bits;
int shape;
int vol_sprite_usage;
int sprite_brightness_change;
int sprite_warping_accuracy;
int num_sprite_warping_points;
int real_sprite_warping_points;
int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
/// sprite trajectory points
uint16_t sprite_traj[4][2];
/// sprite shift [isChroma]
int sprite_shift[2];
// reversible vlc
int rvlc;
/// could this stream contain resync markers
int resync_marker;
/// time distance of first I -> B, used for interlaced B-frames
int t_frame;
int new_pred;
int enhancement_type;
int scalability;
/// QP above which the ac VLC should be used for intra dc
int intra_dc_threshold;
/* bug workarounds */
int divx_version;
int divx_build;
int xvid_build;
int lavc_build;
int vo_type;
/// flag for having shown the warning about invalid Divx B-frames
int showed_packed_warning;
/** does the stream contain the low_delay flag,
* used to work around buggy encoders. */
int vol_control_parameters;
int cplx_estimation_trash_i;
int cplx_estimation_trash_p;
int cplx_estimation_trash_b;
int rgb;
Mpeg4VideoDSPContext mdsp;
DECLARE_ALIGNED(8, int32_t, block32)[12][64];
// 0 = DCT, 1 = DPCM top to bottom scan, -1 = DPCM bottom to top scan
int dpcm_direction;
int16_t dpcm_macroblock[3][256];
} Mpeg4DecContext;
int ff_mpeg4_decode_picture_header(Mpeg4DecContext *ctx, GetBitContext *gb,
int header, int parse_only);
void ff_mpeg4_decode_studio(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb,
uint8_t *dest_cr, int block_size, int uvlinesize,
int dct_linesize, int dct_offset);
void ff_mpeg4_mcsel_motion(MpegEncContext *s,
uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
uint8_t *const *ref_picture);
int ff_mpeg4_decode_partitions(Mpeg4DecContext *ctx);
int ff_mpeg4_decode_video_packet_header(Mpeg4DecContext *ctx);
int ff_mpeg4_decode_studio_slice_header(Mpeg4DecContext *ctx);
int ff_mpeg4_workaround_bugs(AVCodecContext *avctx);
void ff_mpeg4_pred_ac(MpegEncContext *s, int16_t *block, int n,
int dir);
int ff_mpeg4_frame_end(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
#endif
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