FFmpeg
mpegvideodec.h
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1 /*
2  * MPEGVideo decoders header
3  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4  * Copyright (c) 2002-2004 Michael Niedermayer
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * mpegvideo decoder header.
26  */
27 
28 #ifndef AVCODEC_MPEGVIDEODEC_H
29 #define AVCODEC_MPEGVIDEODEC_H
30 
31 #include "libavutil/frame.h"
32 #include "avcodec.h"
33 #include "get_bits.h"
34 #include "mpegpicture.h"
35 #include "mpegvideo.h"
36 #include "mpegvideodata.h"
37 
38 #define FF_MPV_QSCALE_TYPE_MPEG1 0
39 #define FF_MPV_QSCALE_TYPE_MPEG2 1
40 
41 /**
42  * Initialize the given MpegEncContext for decoding.
43  * the changed fields will not depend upon
44  * the prior state of the MpegEncContext.
45  */
47 
49 
53 
54 int ff_mpv_export_qp_table(MpegEncContext *s, AVFrame *f, Picture *p, int qp_type);
56 void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);
57 void ff_mpeg_flush(AVCodecContext *avctx);
58 
60 
61 static inline int mpeg_get_qscale(MpegEncContext *s)
62 {
63  int qscale = get_bits(&s->gb, 5);
64  if (s->q_scale_type)
65  return ff_mpeg2_non_linear_qscale[qscale];
66  else
67  return qscale << 1;
68 }
69 
70 #endif /* AVCODEC_MPEGVIDEODEC_H */
ff_mpv_frame_start
int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx)
generic function called after decoding the header and before a frame is decoded.
Definition: mpegvideo_dec.c:276
ff_mpeg_update_thread_context
int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
Definition: mpegvideo_dec.c:51
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
ff_mpeg2_non_linear_qscale
const uint8_t ff_mpeg2_non_linear_qscale[32]
Definition: mpegvideodata.c:26
mpegvideo.h
Picture
Picture.
Definition: mpegpicture.h:46
ff_mpv_report_decode_progress
void ff_mpv_report_decode_progress(MpegEncContext *s)
Definition: mpegvideo_dec.c:580
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:380
ff_mpv_decode_init
void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx)
Initialize the given MpegEncContext for decoding.
Definition: mpegvideo_dec.c:37
s
#define s(width, name)
Definition: cbs_vp9.c:256
ff_mpeg_draw_horiz_band
void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h)
Definition: mpegvideo_dec.c:543
get_bits.h
f
f
Definition: af_crystalizer.c:122
frame.h
mpegpicture.h
mpegvideodata.h
avcodec.h
ff_mpv_common_frame_size_change
int ff_mpv_common_frame_size_change(MpegEncContext *s)
Definition: mpegvideo_dec.c:194
ff_mpv_export_qp_table
int ff_mpv_export_qp_table(MpegEncContext *s, AVFrame *f, Picture *p, int qp_type)
Definition: mpegvideo_dec.c:513
AVCodecContext
main external API structure.
Definition: avcodec.h:389
ff_print_debug_info
void ff_print_debug_info(MpegEncContext *s, Picture *p, AVFrame *pict)
Definition: mpegvideo_dec.c:506
mpeg_get_qscale
static int mpeg_get_qscale(MpegEncContext *s)
Definition: mpegvideodec.h:61
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
h
h
Definition: vp9dsp_template.c:2038
MpegEncContext
MpegEncContext.
Definition: mpegvideo.h:62
ff_mpeg_flush
void ff_mpeg_flush(AVCodecContext *avctx)
Definition: mpegvideo_dec.c:551
ff_mpv_frame_end
void ff_mpv_frame_end(MpegEncContext *s)
Definition: mpegvideo_dec.c:498