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/*
* MPEGVideo decoders header
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
* Copyright (c) 2002-2004 Michael Niedermayer
*
* 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
*/
/**
* @file
* mpegvideo decoder header.
*/
#ifndef AVCODEC_MPEGVIDEODEC_H
#define AVCODEC_MPEGVIDEODEC_H
#include "libavutil/frame.h"
#include "libavutil/log.h"
#include "avcodec.h"
#include "get_bits.h"
#include "mpegpicture.h"
#include "mpegvideo.h"
#include "mpegvideodata.h"
#define FF_MPV_QSCALE_TYPE_MPEG1 0
#define FF_MPV_QSCALE_TYPE_MPEG2 1
/**
* Initialize the given MpegEncContext for decoding.
* the changed fields will not depend upon
* the prior state of the MpegEncContext.
*/
void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx);
int ff_mpv_common_frame_size_change(MpegEncContext *s);
int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx);
void ff_mpv_reconstruct_mb(MpegEncContext *s, int16_t block[12][64]);
void ff_mpv_report_decode_progress(MpegEncContext *s);
void ff_mpv_frame_end(MpegEncContext *s);
int ff_mpv_export_qp_table(const MpegEncContext *s, AVFrame *f, const Picture *p, int qp_type);
int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);
void ff_mpeg_flush(AVCodecContext *avctx);
void ff_print_debug_info(const MpegEncContext *s, const Picture *p, AVFrame *pict);
static inline int mpeg_get_qscale(MpegEncContext *s)
{
int qscale = get_bits(&s->gb, 5);
if (s->q_scale_type)
return ff_mpeg2_non_linear_qscale[qscale];
else
return qscale << 1;
}
static inline int check_marker(void *logctx, GetBitContext *s, const char *msg)
{
int bit = get_bits1(s);
if (!bit)
av_log(logctx, AV_LOG_INFO, "Marker bit missing at %d of %d %s\n",
get_bits_count(s) - 1, s->size_in_bits, msg);
return bit;
}
#endif /* AVCODEC_MPEGVIDEODEC_H */
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