/*

  * 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;

 
 /**

  * 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);

 /**
  * Get a DV profile for the provided stream parameters.
  * The frame rate is used as a best-effort parameter.
  */
 const AVDVProfile *av_dv_codec_profile2(int width, int height, enum AVPixelFormat pix_fmt, AVRational frame_rate);
 

 #endif /* AVCODEC_DV_PROFILE_H */