libavcodec/mjpegenc.h

   1 /*
   2  * MJPEG encoder
   3  * Copyright (c) 2000, 2001 Fabrice Bellard.
   4  * Copyright (c) 2003 Alex Beregszaszi
   5  * Copyright (c) 2003-2004 Michael Niedermayer
   6  *
   7  * Support for external huffman table, various fixes (AVID workaround),
   8  * aspecting, new decode_frame mechanism and apple mjpeg-b support
   9  *                                  by Alex Beregszaszi
  10  *
  11  * This file is part of FFmpeg.
  12  *
  13  * FFmpeg is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU Lesser General Public
  15  * License as published by the Free Software Foundation; either
  16  * version 2.1 of the License, or (at your option) any later version.
  17  *
  18  * FFmpeg is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21  * Lesser General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU Lesser General Public
  24  * License along with FFmpeg; if not, write to the Free Software
  25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  26  */
  27
  28 /**
  29  * @file mjpegenc.h
  30  * MJPEG encoder.
  31  */
  32
  33 #ifndef FFMPEG_MJPEGENC_H
  34 #define FFMPEG_MJPEGENC_H
  35
  36 #include "dsputil.h"
  37 #include "mpegvideo.h"
  38
  39 typedef struct MJpegContext {
  40     uint8_t huff_size_dc_luminance[12]; //FIXME use array [3] instead of lumi / chrom, for easier addressing
  41     uint16_t huff_code_dc_luminance[12];
  42     uint8_t huff_size_dc_chrominance[12];
  43     uint16_t huff_code_dc_chrominance[12];
  44
  45     uint8_t huff_size_ac_luminance[256];
  46     uint16_t huff_code_ac_luminance[256];
  47     uint8_t huff_size_ac_chrominance[256];
  48     uint16_t huff_code_ac_chrominance[256];
  49 } MJpegContext;
  50
  51 int  ff_mjpeg_encode_init(MpegEncContext *s);
  52 void ff_mjpeg_encode_close(MpegEncContext *s);
  53 void ff_mjpeg_encode_picture_header(MpegEncContext *s);
  54 void ff_mjpeg_encode_picture_trailer(MpegEncContext *s);
  55 void ff_mjpeg_encode_stuffing(PutBitContext *pbc);
  56 void ff_mjpeg_encode_dc(MpegEncContext *s, int val,
  57                         uint8_t *huff_size, uint16_t *huff_code);
  58 void ff_mjpeg_encode_mb(MpegEncContext *s, DCTELEM block[6][64]);
  59
  60 #endif /* FFMPEG_MJPEGENC_H */