mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
6edd6a4f00
Reviewed-by: Michael Niedermayer <michaelni@gmx.at> Signed-off-by: James Almer <jamrial@gmail.com>
87 lines
3.7 KiB
C
87 lines
3.7 KiB
C
/*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef AVCODEC_DV_PROFILE_H
|
|
#define AVCODEC_DV_PROFILE_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "libavutil/pixfmt.h"
|
|
#include "libavutil/rational.h"
|
|
#include "avcodec.h"
|
|
|
|
/* minimum number of bytes to read from a DV stream in order to
|
|
* determine the profile */
|
|
#define DV_PROFILE_BYTES (6 * 80) /* 6 DIF blocks */
|
|
|
|
|
|
/*
|
|
* AVDVProfile is used to express the differences between various
|
|
* DV flavors. For now it's primarily used for differentiating
|
|
* 525/60 and 625/50, but the plans are to use it for various
|
|
* DV specs as well (e.g. SMPTE314M vs. IEC 61834).
|
|
*/
|
|
typedef struct AVDVProfile {
|
|
int dsf; /* value of the dsf in the DV header */
|
|
int video_stype; /* stype for VAUX source pack */
|
|
int frame_size; /* total size of one frame in bytes */
|
|
int difseg_size; /* number of DIF segments per DIF channel */
|
|
int n_difchan; /* number of DIF channels per frame */
|
|
AVRational time_base; /* 1/framerate */
|
|
int ltc_divisor; /* FPS from the LTS standpoint */
|
|
int height; /* picture height in pixels */
|
|
int width; /* picture width in pixels */
|
|
AVRational sar[2]; /* sample aspect ratios for 4:3 and 16:9 */
|
|
enum AVPixelFormat pix_fmt; /* picture pixel format */
|
|
int bpm; /* blocks per macroblock */
|
|
const uint8_t *block_sizes; /* AC block sizes, in bits */
|
|
int audio_stride; /* size of audio_shuffle table */
|
|
int audio_min_samples[3]; /* min amount of audio samples */
|
|
/* for 48kHz, 44.1kHz and 32kHz */
|
|
int audio_samples_dist[5]; /* how many samples are supposed to be */
|
|
/* in each frame in a 5 frames window */
|
|
const uint8_t (*audio_shuffle)[9]; /* PCM shuffling table */
|
|
} AVDVProfile;
|
|
|
|
#if FF_API_DV_FRAME_PROFILE
|
|
/**
|
|
* @deprecated use av_dv_frame_profile()
|
|
*/
|
|
attribute_deprecated
|
|
const AVDVProfile* avpriv_dv_frame_profile2(AVCodecContext* codec, const AVDVProfile *sys,
|
|
const uint8_t* frame, unsigned buf_size);
|
|
#endif
|
|
|
|
/**
|
|
* Get a DV profile for the provided compressed frame.
|
|
*
|
|
* @param sys the profile used for the previous frame, may be NULL
|
|
* @param frame the compressed data buffer
|
|
* @param buf_size size of the buffer in bytes
|
|
* @return the DV profile for the supplied data or NULL on failure
|
|
*/
|
|
const AVDVProfile *av_dv_frame_profile(const AVDVProfile *sys,
|
|
const uint8_t *frame, unsigned buf_size);
|
|
|
|
/**
|
|
* Get a DV profile for the provided stream parameters.
|
|
*/
|
|
const AVDVProfile *av_dv_codec_profile(int width, int height, enum AVPixelFormat pix_fmt);
|
|
|
|
#endif /* AVCODEC_DV_PROFILE_H */
|