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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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 
28 typedef 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  */
39 typedef 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 AVPixelFormat 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 
64  const uint8_t* frame, unsigned buf_size);
66 
70 void ff_dv_print_profiles(void *logctx, int loglevel);
71 
72 #endif /* AVCODEC_DV_PROFILE_H */
AVRational sar[2]
Definition: dv_profile.h:49
uint8_t
int audio_samples_dist[5]
Definition: dv_profile.h:58
enum AVPixelFormat pix_fmt
Definition: dv_profile.h:52
const DVprofile * avpriv_dv_frame_profile(const DVprofile *sys, const uint8_t *frame, unsigned buf_size)
Definition: dv_profile.c:283
const uint8_t * block_sizes
Definition: dv_profile.h:54
int audio_stride
Definition: dv_profile.h:55
uint16_t mb_coordinates[5]
Definition: dv_profile.h:30
int height
Definition: dv_profile.h:47
const DVprofile * avpriv_dv_codec_profile(AVCodecContext *codec)
Definition: dv_profile.c:310
int n_difchan
Definition: dv_profile.h:44
int difseg_size
Definition: dv_profile.h:43
AVRational time_base
Definition: dv_profile.h:45
struct DVwork_chunk DVwork_chunk
int width
Definition: dv_profile.h:48
int frame_size
Definition: dv_profile.h:42
int audio_min_samples[3]
Definition: dv_profile.h:56
external API header
main external API structure.
Definition: avcodec.h:1339
rational number numerator/denominator
Definition: rational.h:43
uint32_t * idct_factor
Definition: dv_profile.h:51
const uint8_t(* audio_shuffle)[9]
Definition: dv_profile.h:60
void ff_dv_print_profiles(void *logctx, int loglevel)
Print all allowed DV profiles into logctx at specified logging level.
Definition: dv_profile.c:323
rational numbers
uint16_t buf_offset
Definition: dv_profile.h:29
pixel format definitions
int ltc_divisor
Definition: dv_profile.h:46
int video_stype
Definition: dv_profile.h:41
DVwork_chunk * work_chunks
Definition: dv_profile.h:50
struct DVprofile DVprofile
AVPixelFormat
Pixel format.
Definition: pixfmt.h:63