yading@10: /*
yading@10:  * This file is part of Libav.
yading@10:  *
yading@10:  * Libav is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * Libav is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with Libav; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #ifndef AVCODEC_DV_PROFILE_H
yading@10: #define AVCODEC_DV_PROFILE_H
yading@10: 
yading@10: #include <stdint.h>
yading@10: 
yading@10: #include "libavutil/pixfmt.h"
yading@10: #include "libavutil/rational.h"
yading@10: #include "avcodec.h"
yading@10: 
yading@10: /* minimum number of bytes to read from a DV stream in order to
yading@10:    determine the profile */
yading@10: #define DV_PROFILE_BYTES (6*80) /* 6 DIF blocks */
yading@10: 
yading@10: typedef struct DVwork_chunk {
yading@10:     uint16_t  buf_offset;
yading@10:     uint16_t  mb_coordinates[5];
yading@10: } DVwork_chunk;
yading@10: 
yading@10: /*
yading@10:  * DVprofile is used to express the differences between various
yading@10:  * DV flavors. For now it's primarily used for differentiating
yading@10:  * 525/60 and 625/50, but the plans are to use it for various
yading@10:  * DV specs as well (e.g. SMPTE314M vs. IEC 61834).
yading@10:  */
yading@10: typedef struct DVprofile {
yading@10:     int              dsf;                   /* value of the dsf in the DV header */
yading@10:     int              video_stype;           /* stype for VAUX source pack */
yading@10:     int              frame_size;            /* total size of one frame in bytes */
yading@10:     int              difseg_size;           /* number of DIF segments per DIF channel */
yading@10:     int              n_difchan;             /* number of DIF channels per frame */
yading@10:     AVRational       time_base;             /* 1/framerate */
yading@10:     int              ltc_divisor;           /* FPS from the LTS standpoint */
yading@10:     int              height;                /* picture height in pixels */
yading@10:     int              width;                 /* picture width in pixels */
yading@10:     AVRational       sar[2];                /* sample aspect ratios for 4:3 and 16:9 */
yading@10:     DVwork_chunk    *work_chunks;           /* each thread gets its own chunk of frame to work on */
yading@10:     uint32_t        *idct_factor;           /* set of iDCT factor tables */
yading@10:     enum AVPixelFormat pix_fmt;             /* picture pixel format */
yading@10:     int              bpm;                   /* blocks per macroblock */
yading@10:     const uint8_t   *block_sizes;           /* AC block sizes, in bits */
yading@10:     int              audio_stride;          /* size of audio_shuffle table */
yading@10:     int              audio_min_samples[3];  /* min amount of audio samples */
yading@10:                                             /* for 48kHz, 44.1kHz and 32kHz */
yading@10:     int              audio_samples_dist[5]; /* how many samples are supposed to be */
yading@10:                                             /* in each frame in a 5 frames window */
yading@10:     const uint8_t  (*audio_shuffle)[9];     /* PCM shuffling table */
yading@10: } DVprofile;
yading@10: 
yading@10: const DVprofile* avpriv_dv_frame_profile(const DVprofile *sys,
yading@10:                                          const uint8_t* frame, unsigned buf_size);
yading@10: const DVprofile* avpriv_dv_frame_profile2(AVCodecContext* codec, const DVprofile *sys,
yading@10:                                   const uint8_t* frame, unsigned buf_size);
yading@10: const DVprofile* avpriv_dv_codec_profile(AVCodecContext* codec);
yading@10: 
yading@10: /**
yading@10:  *  Print all allowed DV profiles into logctx at specified logging level.
yading@10:  */
yading@10: void ff_dv_print_profiles(void *logctx, int loglevel);
yading@10: 
yading@10: #endif /* AVCODEC_DV_PROFILE_H */