Libav
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  *
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12  * Lesser General Public License for more details.
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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 
28 /*
29  * AVDVProfile is used to express the differences between various
30  * DV flavors. For now it's primarily used for differentiating
31  * 525/60 and 625/50, but the plans are to use it for various
32  * DV specs as well (e.g. SMPTE314M vs. IEC 61834).
33  */
34 typedef struct AVDVProfile {
35  int dsf; /* value of the dsf in the DV header */
36  int video_stype; /* stype for VAUX source pack */
37  int frame_size; /* total size of one frame in bytes */
38  int difseg_size; /* number of DIF segments per DIF channel */
39  int n_difchan; /* number of DIF channels per frame */
40  AVRational time_base; /* 1/framerate */
41  int ltc_divisor; /* FPS from the LTS standpoint */
42  int height; /* picture height in pixels */
43  int width; /* picture width in pixels */
44  AVRational sar[2]; /* sample aspect ratios for 4:3 and 16:9 */
45  enum AVPixelFormat pix_fmt; /* picture pixel format */
46  int bpm; /* blocks per macroblock */
47  const uint8_t *block_sizes; /* AC block sizes, in bits */
48  int audio_stride; /* size of audio_shuffle table */
49  int audio_min_samples[3]; /* min amount of audio samples */
50  /* for 48kHz, 44.1kHz and 32kHz */
51  int audio_samples_dist[5]; /* how many samples are supposed to be */
52  /* in each frame in a 5 frames window */
53  const uint8_t (*audio_shuffle)[9]; /* PCM shuffling table */
54 } AVDVProfile;
55 
65  const uint8_t *frame, unsigned buf_size);
66 
71 
72 #endif /* AVCODEC_DV_PROFILE_H */
const uint8_t(* audio_shuffle)[9]
Definition: dv_profile.h:53
int ltc_divisor
Definition: dv_profile.h:41
int audio_samples_dist[5]
Definition: dv_profile.h:51
uint8_t
int difseg_size
Definition: dv_profile.h:38
AVRational sar[2]
Definition: dv_profile.h:44
enum AVPixelFormat pix_fmt
Definition: dv_profile.h:45
AVRational time_base
Definition: dv_profile.h:40
int frame_size
Definition: dv_profile.h:37
AVPixelFormat
Pixel format.
Definition: pixfmt.h:63
enum AVPixelFormat pix_fmt
Definition: movenc.c:843
const AVDVProfile * av_dv_frame_profile(const AVDVProfile *sys, const uint8_t *frame, unsigned buf_size)
Get a DV profile for the provided compressed frame.
Definition: dv_profile.c:267
const uint8_t * block_sizes
Definition: dv_profile.h:47
static int width
Definition: utils.c:156
const AVDVProfile * av_dv_codec_profile(int width, int height, enum AVPixelFormat pix_fmt)
Get a DV profile for the provided stream parameters.
Definition: dv_profile.c:296
int audio_stride
Definition: dv_profile.h:48
rational number numerator/denominator
Definition: rational.h:43
int video_stype
Definition: dv_profile.h:36
int height
Definition: gxfenc.c:72
Libavcodec external API header.
int audio_min_samples[3]
Definition: dv_profile.h:49
int n_difchan
Definition: dv_profile.h:39