FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/mpegvideodec.h
Date: 2022-10-02 18:56:10
Exec Total Coverage
Lines: 9 11 81.8%
Branches: 3 4 75.0%

Line Branch Exec Source
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 "libavutil/log.h"
33
34 #include "avcodec.h"
35 #include "get_bits.h"
36 #include "mpegpicture.h"
37 #include "mpegvideo.h"
38 #include "mpegvideodata.h"
39
40 #define FF_MPV_QSCALE_TYPE_MPEG1 0
41 #define FF_MPV_QSCALE_TYPE_MPEG2 1
42
43 /**
44 * Initialize the given MpegEncContext for decoding.
45 * the changed fields will not depend upon
46 * the prior state of the MpegEncContext.
47 */
48 void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx);
49
50 int ff_mpv_common_frame_size_change(MpegEncContext *s);
51
52 int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx);
53 void ff_mpv_report_decode_progress(MpegEncContext *s);
54 void ff_mpv_frame_end(MpegEncContext *s);
55
56 int ff_mpv_export_qp_table(const MpegEncContext *s, AVFrame *f, const Picture *p, int qp_type);
57 int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
58 void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);
59 void ff_mpeg_flush(AVCodecContext *avctx);
60
61 void ff_print_debug_info(const MpegEncContext *s, const Picture *p, AVFrame *pict);
62
63 269415 static inline int mpeg_get_qscale(MpegEncContext *s)
64 {
65 269415 int qscale = get_bits(&s->gb, 5);
66
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269415 if (s->q_scale_type)
67 215174 return ff_mpeg2_non_linear_qscale[qscale];
68 else
69 54241 return qscale << 1;
70 }
71
72 24678 static inline int check_marker(void *logctx, GetBitContext *s, const char *msg)
73 {
74 24678 int bit = get_bits1(s);
75
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24678 if (!bit)
76 av_log(logctx, AV_LOG_INFO, "Marker bit missing at %d of %d %s\n",
77 get_bits_count(s) - 1, s->size_in_bits, msg);
78
79 24678 return bit;
80 }
81
82 #endif /* AVCODEC_MPEGVIDEODEC_H */
83