dv: Split profile handling code into a separate file.
[libav.git] / libavcodec / dv_profile.h
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1/*
2 * This file is part of Libav.
3 *
4 * Libav 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 * Libav 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 Libav; 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
28typedef struct DVwork_chunk {
29 uint16_t buf_offset;
30 uint16_t mb_coordinates[5];
31} DVwork_chunk;
32
33/*
34 * DVprofile 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 */
39typedef struct DVprofile {
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 DVwork_chunk *work_chunks; /* each thread gets its own chunk of frame to work on */
51 uint32_t *idct_factor; /* set of iDCT factor tables */
52 enum PixelFormat pix_fmt; /* picture pixel format */
53 int bpm; /* blocks per macroblock */
54 const uint8_t *block_sizes; /* AC block sizes, in bits */
55 int audio_stride; /* size of audio_shuffle table */
56 int audio_min_samples[3]; /* min amount of audio samples */
57 /* for 48kHz, 44.1kHz and 32kHz */
58 int audio_samples_dist[5]; /* how many samples are supposed to be */
59 /* in each frame in a 5 frames window */
60 const uint8_t (*audio_shuffle)[9]; /* PCM shuffling table */
61} DVprofile;
62
63const DVprofile* avpriv_dv_frame_profile(const DVprofile *sys,
64 const uint8_t* frame, unsigned buf_size);
65const DVprofile* avpriv_dv_codec_profile(AVCodecContext* codec);
66
67/**
68 * Print all allowed DV profiles into logctx at specified logging level.
69 */
70void ff_dv_print_profiles(void *logctx, int loglevel);
71
72#endif /* AVCODEC_DV_PROFILE_H */