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2ba45a60 DM |
1 | /* |
2 | * This file is part of FFmpeg. | |
3 | * | |
4 | * FFmpeg is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU Lesser General Public | |
6 | * License as published by the Free Software Foundation; either | |
7 | * version 2.1 of the License, or (at your option) any later version. | |
8 | * | |
9 | * FFmpeg is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * Lesser General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU Lesser General Public | |
15 | * License along with FFmpeg; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | */ | |
18 | ||
19 | #ifndef AVCODEC_DV_PROFILE_H | |
20 | #define AVCODEC_DV_PROFILE_H | |
21 | ||
22 | #include <stdint.h> | |
23 | ||
24 | #include "libavutil/pixfmt.h" | |
25 | #include "libavutil/rational.h" | |
26 | #include "avcodec.h" | |
27 | ||
28 | /* minimum number of bytes to read from a DV stream in order to | |
29 | * determine the profile */ | |
30 | #define DV_PROFILE_BYTES (6 * 80) /* 6 DIF blocks */ | |
31 | ||
32 | ||
33 | /* | |
34 | * AVDVProfile is used to express the differences between various | |
35 | * DV flavors. For now it's primarily used for differentiating | |
36 | * 525/60 and 625/50, but the plans are to use it for various | |
37 | * DV specs as well (e.g. SMPTE314M vs. IEC 61834). | |
38 | */ | |
39 | typedef struct AVDVProfile { | |
40 | int dsf; /* value of the dsf in the DV header */ | |
41 | int video_stype; /* stype for VAUX source pack */ | |
42 | int frame_size; /* total size of one frame in bytes */ | |
43 | int difseg_size; /* number of DIF segments per DIF channel */ | |
44 | int n_difchan; /* number of DIF channels per frame */ | |
45 | AVRational time_base; /* 1/framerate */ | |
46 | int ltc_divisor; /* FPS from the LTS standpoint */ | |
47 | int height; /* picture height in pixels */ | |
48 | int width; /* picture width in pixels */ | |
49 | AVRational sar[2]; /* sample aspect ratios for 4:3 and 16:9 */ | |
50 | enum AVPixelFormat pix_fmt; /* picture pixel format */ | |
51 | int bpm; /* blocks per macroblock */ | |
52 | const uint8_t *block_sizes; /* AC block sizes, in bits */ | |
53 | int audio_stride; /* size of audio_shuffle table */ | |
54 | int audio_min_samples[3]; /* min amount of audio samples */ | |
55 | /* for 48kHz, 44.1kHz and 32kHz */ | |
56 | int audio_samples_dist[5]; /* how many samples are supposed to be */ | |
57 | /* in each frame in a 5 frames window */ | |
58 | const uint8_t (*audio_shuffle)[9]; /* PCM shuffling table */ | |
59 | } AVDVProfile; | |
60 | ||
f6fa7814 DM |
61 | #if FF_API_DV_FRAME_PROFILE |
62 | /** | |
63 | * @deprecated use av_dv_frame_profile() | |
64 | */ | |
65 | attribute_deprecated | |
2ba45a60 DM |
66 | const AVDVProfile* avpriv_dv_frame_profile2(AVCodecContext* codec, const AVDVProfile *sys, |
67 | const uint8_t* frame, unsigned buf_size); | |
f6fa7814 | 68 | #endif |
2ba45a60 DM |
69 | |
70 | /** | |
71 | * Get a DV profile for the provided compressed frame. | |
72 | * | |
73 | * @param sys the profile used for the previous frame, may be NULL | |
74 | * @param frame the compressed data buffer | |
75 | * @param buf_size size of the buffer in bytes | |
76 | * @return the DV profile for the supplied data or NULL on failure | |
77 | */ | |
78 | const AVDVProfile *av_dv_frame_profile(const AVDVProfile *sys, | |
79 | const uint8_t *frame, unsigned buf_size); | |
80 | ||
81 | /** | |
82 | * Get a DV profile for the provided stream parameters. | |
83 | */ | |
84 | const AVDVProfile *av_dv_codec_profile(int width, int height, enum AVPixelFormat pix_fmt); | |
85 | ||
86 | #endif /* AVCODEC_DV_PROFILE_H */ |