repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
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 | ||
| 19 | #ifndef AVCODEC_DV_PROFILE_H | |
| 20 | #define AVCODEC_DV_PROFILE_H | |
| 21 | ||
| 22 | #include <stdint.h> | |
| 23 | ||
| 24 | #include "libavutil/pixfmt.h" | |
| 25 | #include "libavutil/rational.h" | |
| 26 | #include "avcodec.h" | |
| 27 | ||
| 28 | /* minimum number of bytes to read from a DV stream in order to | |
| 29 | * determine the profile */ | |
| 30 | #define DV_PROFILE_BYTES (6 * 80) /* 6 DIF blocks */ | |
| 31 | ||
| 32 | ||
| 33 | /* | |
| 34 | * AVDVProfile is used to express the differences between various | |
| 35 | * DV flavors. For now it's primarily used for differentiating | |
| 36 | * 525/60 and 625/50, but the plans are to use it for various | |
| 37 | * DV specs as well (e.g. SMPTE314M vs. IEC 61834). | |
| 38 | */ | |
| 39 | typedef struct AVDVProfile { | |
| 40 | int dsf; /* value of the dsf in the DV header */ | |
| 41 | int video_stype; /* stype for VAUX source pack */ | |
| 42 | int frame_size; /* total size of one frame in bytes */ | |
| 43 | int difseg_size; /* number of DIF segments per DIF channel */ | |
| 44 | int n_difchan; /* number of DIF channels per frame */ | |
| 45 | AVRational time_base; /* 1/framerate */ | |
| 46 | int ltc_divisor; /* FPS from the LTS standpoint */ | |
| 47 | int height; /* picture height in pixels */ | |
| 48 | int width; /* picture width in pixels */ | |
| 49 | AVRational sar[2]; /* sample aspect ratios for 4:3 and 16:9 */ | |
| 50 | enum AVPixelFormat pix_fmt; /* picture pixel format */ | |
| 51 | int bpm; /* blocks per macroblock */ | |
| 52 | const uint8_t *block_sizes; /* AC block sizes, in bits */ | |
| 53 | int audio_stride; /* size of audio_shuffle table */ | |
| 54 | int audio_min_samples[3]; /* min amount of audio samples */ | |
| 55 | /* for 48kHz, 44.1kHz and 32kHz */ | |
| 56 | int audio_samples_dist[5]; /* how many samples are supposed to be */ | |
| 57 | /* in each frame in a 5 frames window */ | |
| 58 | const uint8_t (*audio_shuffle)[9]; /* PCM shuffling table */ | |
| 59 | } AVDVProfile; | |
| 60 | ||
| 61 | const AVDVProfile* avpriv_dv_frame_profile2(AVCodecContext* codec, const AVDVProfile *sys, | |
| 62 | const uint8_t* frame, unsigned buf_size); | |
| 63 | ||
| 64 | /** | |
| 65 | * Get a DV profile for the provided compressed frame. | |
| 66 | * | |
| 67 | * @param sys the profile used for the previous frame, may be NULL | |
| 68 | * @param frame the compressed data buffer | |
| 69 | * @param buf_size size of the buffer in bytes | |
| 70 | * @return the DV profile for the supplied data or NULL on failure | |
| 71 | */ | |
| 72 | const AVDVProfile *av_dv_frame_profile(const AVDVProfile *sys, | |
| 73 | const uint8_t *frame, unsigned buf_size); | |
| 74 | ||
| 75 | /** | |
| 76 | * Get a DV profile for the provided stream parameters. | |
| 77 | */ | |
| 78 | const AVDVProfile *av_dv_codec_profile(int width, int height, enum AVPixelFormat pix_fmt); | |
| 79 | ||
| 80 | #endif /* AVCODEC_DV_PROFILE_H */ |