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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 "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_reconstruct_mb(MpegEncContext *s, int16_t block[12][64]); | ||
54 | void ff_mpv_report_decode_progress(MpegEncContext *s); | ||
55 | void ff_mpv_frame_end(MpegEncContext *s); | ||
56 | |||
57 | int ff_mpv_export_qp_table(const MpegEncContext *s, AVFrame *f, const Picture *p, int qp_type); | ||
58 | int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src); | ||
59 | void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h); | ||
60 | void ff_mpeg_flush(AVCodecContext *avctx); | ||
61 | |||
62 | void ff_print_debug_info(const MpegEncContext *s, const Picture *p, AVFrame *pict); | ||
63 | |||
64 | 369789 | static inline int mpeg_get_qscale(MpegEncContext *s) | |
65 | { | ||
66 | 369789 | int qscale = get_bits(&s->gb, 5); | |
67 |
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369789 | if (s->q_scale_type) |
68 | 313742 | return ff_mpeg2_non_linear_qscale[qscale]; | |
69 | else | ||
70 | 56047 | return qscale << 1; | |
71 | } | ||
72 | |||
73 | 25450 | static inline int check_marker(void *logctx, GetBitContext *s, const char *msg) | |
74 | { | ||
75 | 25450 | int bit = get_bits1(s); | |
76 |
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25450 | if (!bit) |
77 | ✗ | av_log(logctx, AV_LOG_INFO, "Marker bit missing at %d of %d %s\n", | |
78 | ✗ | get_bits_count(s) - 1, s->size_in_bits, msg); | |
79 | |||
80 | 25450 | return bit; | |
81 | } | ||
82 | |||
83 | #endif /* AVCODEC_MPEGVIDEODEC_H */ | ||
84 |