/*
* MJPEG encoder and decoder
- * Copyright (c) 2000, 2001 Fabrice Bellard.
+ * Copyright (c) 2000, 2001 Fabrice Bellard
* Copyright (c) 2003 Alex Beregszaszi
* Copyright (c) 2003-2004 Michael Niedermayer
*
- * This file is part of FFmpeg.
+ * Support for external huffman table, various fixes (AVID workaround),
+ * aspecting, new decode_frame mechanism and apple mjpeg-b support
+ * by Alex Beregszaszi
+ *
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * 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.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * Support for external huffman table, various fixes (AVID workaround),
- * aspecting, new decode_frame mechanism and apple mjpeg-b support
- * by Alex Beregszaszi
*/
/**
- * @file mjpeg.h
+ * @file
* MJPEG encoder and decoder.
*/
-#ifndef MJPEG_H
-#define MJPEG_H
+#ifndef AVCODEC_MJPEG_H
+#define AVCODEC_MJPEG_H
#include "avcodec.h"
-#include "bitstream.h"
-#include "dsputil.h"
-#include "mpegvideo.h"
+#include "put_bits.h"
/* JPEG marker codes */
put_bits(p, 8, code);
}
-#define MAX_COMPONENTS 4
-
-typedef struct MJpegDecodeContext {
- AVCodecContext *avctx;
- GetBitContext gb;
-
- int start_code; /* current start code */
- int buffer_size;
- uint8_t *buffer;
-
- int16_t quant_matrixes[4][64];
- VLC vlcs[2][4];
- int qscale[4]; ///< quantizer scale calculated from quant_matrixes
-
- int org_height; /* size given at codec init */
- int first_picture; /* true if decoding first picture */
- int interlaced; /* true if interlaced */
- int bottom_field; /* true if bottom field */
- int lossless;
- int ls;
- int progressive;
- int rgb;
- int rct; /* standard rct */
- int pegasus_rct; /* pegasus reversible colorspace transform */
- int bits; /* bits per component */
-
- int maxval;
- int near; ///< near lossless bound (si 0 for lossless)
- int t1,t2,t3;
- int reset; ///< context halfing intervall ?rename
-
- int width, height;
- int mb_width, mb_height;
- int nb_components;
- int component_id[MAX_COMPONENTS];
- int h_count[MAX_COMPONENTS]; /* horizontal and vertical count for each component */
- int v_count[MAX_COMPONENTS];
- int comp_index[MAX_COMPONENTS];
- int dc_index[MAX_COMPONENTS];
- int ac_index[MAX_COMPONENTS];
- int nb_blocks[MAX_COMPONENTS];
- int h_scount[MAX_COMPONENTS];
- int v_scount[MAX_COMPONENTS];
- int h_max, v_max; /* maximum h and v counts */
- int quant_index[4]; /* quant table index for each component */
- int last_dc[MAX_COMPONENTS]; /* last DEQUANTIZED dc (XXX: am I right to do that ?) */
- AVFrame picture; /* picture structure */
- int linesize[MAX_COMPONENTS]; ///< linesize << interlaced
- int8_t *qscale_table;
- DECLARE_ALIGNED_8(DCTELEM, block[64]);
- ScanTable scantable;
- DSPContext dsp;
-
- int restart_interval;
- int restart_count;
-
- int buggy_avid;
- int cs_itu601;
- int interlace_polarity;
-
- int mjpb_skiptosod;
-
- int cur_scan; /* current scan, used by JPEG-LS */
-} MJpegDecodeContext;
-
-#endif /* MJPEG_H */
+#define PREDICT(ret, topleft, top, left, predictor)\
+ switch(predictor){\
+ case 1: ret= left; break;\
+ case 2: ret= top; break;\
+ case 3: ret= topleft; break;\
+ case 4: ret= left + top - topleft; break;\
+ case 5: ret= left + ((top - topleft)>>1); break;\
+ case 6: ret= top + ((left - topleft)>>1); break;\
+ default:\
+ case 7: ret= (left + top)>>1; break;\
+ }
+
+extern av_export const uint8_t avpriv_mjpeg_bits_dc_luminance[];
+extern av_export const uint8_t avpriv_mjpeg_val_dc[];
+
+extern av_export const uint8_t avpriv_mjpeg_bits_dc_chrominance[];
+
+extern av_export const uint8_t avpriv_mjpeg_bits_ac_luminance[];
+extern av_export const uint8_t avpriv_mjpeg_val_ac_luminance[];
+
+extern av_export const uint8_t avpriv_mjpeg_bits_ac_chrominance[];
+extern av_export const uint8_t avpriv_mjpeg_val_ac_chrominance[];
+
+void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
+ const uint8_t *bits_table,
+ const uint8_t *val_table);
+
+#endif /* AVCODEC_MJPEG_H */
projects / ffmpeg / blobdiff