|
|
|
|
/*
|
|
|
|
|
* H.263 decoder internal header
|
|
|
|
|
*
|
|
|
|
|
* 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_H263DEC_H
|
|
|
|
|
#define AVCODEC_H263DEC_H
|
|
|
|
|
|
|
|
|
|
#include "mpegvideo.h"
|
|
|
|
|
#include "vlc.h"
|
|
|
|
|
|
|
|
|
|
// The defines below define the number of bits that are read at once for
|
|
|
|
|
// reading vlc values. Changing these may improve speed and data cache needs
|
|
|
|
|
// be aware though that decreasing them may need the number of stages that is
|
|
|
|
|
// passed to get_vlc* to be increased.
|
|
|
|
|
#define H263_MV_VLC_BITS 9
|
|
|
|
|
#define INTRA_MCBPC_VLC_BITS 6
|
|
|
|
|
#define INTER_MCBPC_VLC_BITS 7
|
|
|
|
|
#define CBPY_VLC_BITS 6
|
|
|
|
|
#define TEX_VLC_BITS 9
|
|
|
|
|
|
|
|
|
|
extern VLCElem ff_h263_intra_MCBPC_vlc[];
|
|
|
|
|
extern VLCElem ff_h263_inter_MCBPC_vlc[];
|
|
|
|
|
extern VLCElem ff_h263_cbpy_vlc[];
|
|
|
|
|
extern VLCElem ff_h263_mv_vlc[];
|
|
|
|
|
|
|
|
|
|
int ff_h263_decode_motion(MpegEncContext * s, int pred, int f_code);
|
|
|
|
|
int ff_h263_decode_init(AVCodecContext *avctx);
|
|
|
|
|
int ff_h263_decode_frame(AVCodecContext *avctx, AVFrame *frame,
|
|
|
|
|
int *got_frame, AVPacket *avpkt);
|
|
|
|
|
int ff_h263_decode_end(AVCodecContext *avctx);
|
|
|
|
|
void ff_h263_decode_init_vlc(void);
|
|
|
|
|
int ff_h263_decode_picture_header(MpegEncContext *s);
|
|
|
|
|
int ff_h263_decode_gob_header(MpegEncContext *s);
|
|
|
|
|
int ff_h263_decode_mba(MpegEncContext *s);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Print picture info if FF_DEBUG_PICT_INFO is set.
|
|
|
|
|
*/
|
|
|
|
|
void ff_h263_show_pict_info(MpegEncContext *s);
|
|
|
|
|
|
|
|
|
|
int ff_intel_h263_decode_picture_header(MpegEncContext *s);
|
|
|
|
|
int ff_h263_decode_mb(MpegEncContext *s,
|
|
|
|
|
int16_t block[6][64]);
|
|
|
|
|
|
|
|
|
|
int ff_h263_resync(MpegEncContext *s);
|
|
|
|
|
|
|
|
|
|
#endif
|
