/* * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; 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 */ typedef struct DVwork_chunk { uint16_t buf_offset; uint16_t mb_coordinates[5]; } DVwork_chunk; /* * DVprofile 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 DVprofile { 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 */ DVwork_chunk *work_chunks; /* each thread gets its own chunk of frame to work on */ uint32_t *idct_factor; /* set of iDCT factor tables */ 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 */ } DVprofile; const DVprofile* avpriv_dv_frame_profile(const DVprofile *sys, const uint8_t* frame, unsigned buf_size); const DVprofile* avpriv_dv_frame_profile2(AVCodecContext* codec, const DVprofile *sys, const uint8_t* frame, unsigned buf_size); const DVprofile* avpriv_dv_codec_profile(AVCodecContext* codec); /** * Print all allowed DV profiles into logctx at specified logging level. */ void ff_dv_print_profiles(void *logctx, int loglevel); #endif /* AVCODEC_DV_PROFILE_H */