mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
91 lines
2.8 KiB
91 lines
2.8 KiB
/* |
|
* 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. |
|
* |
|
* Also initialize the picture pool. |
|
*/ |
|
int 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); |
|
/** |
|
* Ensure that the dummy frames are allocated according to pict_type if necessary. |
|
*/ |
|
int ff_mpv_alloc_dummy_frames(MpegEncContext *s); |
|
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 MPVPicture *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); |
|
int ff_mpv_decode_close(AVCodecContext *avctx); |
|
|
|
void ff_print_debug_info(const MpegEncContext *s, const MPVPicture *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 */
|
|
|