1 /* 2 * This file is part of FFmpeg. 3 * 4 * FFmpeg 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 * 9 * FFmpeg is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 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 FFmpeg; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 module ffmpeg.libavcodec.dv_profile; 19 20 import ffmpeg.libavcodec; 21 import ffmpeg.libavutil; 22 23 extern (C) @nogc nothrow: 24 25 /* minimum number of bytes to read from a DV stream in order to 26 * determine the profile */ 27 enum DV_PROFILE_BYTES = 6 * 80; /* 6 DIF blocks */ 28 29 /* 30 * AVDVProfile is used to express the differences between various 31 * DV flavors. For now it's primarily used for differentiating 32 * 525/60 and 625/50, but the plans are to use it for various 33 * DV specs as well (e.g. SMPTE314M vs. IEC 61834). 34 */ 35 struct AVDVProfile 36 { 37 int dsf; /* value of the dsf in the DV header */ 38 int video_stype; /* stype for VAUX source pack */ 39 int frame_size; /* total size of one frame in bytes */ 40 int difseg_size; /* number of DIF segments per DIF channel */ 41 int n_difchan; /* number of DIF channels per frame */ 42 AVRational time_base; /* 1/framerate */ 43 int ltc_divisor; /* FPS from the LTS standpoint */ 44 int height; /* picture height in pixels */ 45 int width; /* picture width in pixels */ 46 AVRational[2] sar; /* sample aspect ratios for 4:3 and 16:9 */ 47 AVPixelFormat pix_fmt; /* picture pixel format */ 48 int bpm; /* blocks per macroblock */ 49 const(ubyte)* block_sizes; /* AC block sizes, in bits */ 50 int audio_stride; /* size of audio_shuffle table */ 51 int[3] audio_min_samples; /* min amount of audio samples */ 52 /* for 48kHz, 44.1kHz and 32kHz */ 53 int[5] audio_samples_dist; /* how many samples are supposed to be */ 54 /* in each frame in a 5 frames window */ 55 const(ubyte)[9]* audio_shuffle; /* PCM shuffling table */ 56 } 57 58 /** 59 * Get a DV profile for the provided compressed frame. 60 * 61 * @param sys the profile used for the previous frame, may be NULL 62 * @param frame the compressed data buffer 63 * @param buf_size size of the buffer in bytes 64 * @return the DV profile for the supplied data or NULL on failure 65 */ 66 const(AVDVProfile)* av_dv_frame_profile ( 67 const(AVDVProfile)* sys, 68 const(ubyte)* frame, 69 uint buf_size); 70 71 /** 72 * Get a DV profile for the provided stream parameters. 73 */ 74 const(AVDVProfile)* av_dv_codec_profile (int width, int height, AVPixelFormat pix_fmt); 75 76 /** 77 * Get a DV profile for the provided stream parameters. 78 * The frame rate is used as a best-effort parameter. 79 */ 80 const(AVDVProfile)* av_dv_codec_profile2 (int width, int height, AVPixelFormat pix_fmt, AVRational frame_rate); 81 82 /* AVCODEC_DV_PROFILE_H */