X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fmjpeg.h;h=c556cb2366b74cbe1ca69be0a8ea13d492d69362;hb=36cbdc95393117d36885c9ba06f0df62f50cc46c;hp=ab546edd18a80e78a115e7f3336a6f33231ee048;hpb=6ba04c2b033942a66ee2af5fde67e091febd9aaa;p=ffmpeg

diff --git a/libavcodec/mjpeg.h b/libavcodec/mjpeg.h
index ab546edd18a..c556cb2366b 100644
--- a/libavcodec/mjpeg.h
+++ b/libavcodec/mjpeg.h
@@ -1,9 +1,13 @@
 /*
  * 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
  *
+ * 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 FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
@@ -19,24 +23,18 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; 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 libavcodec/mjpeg.h
  * 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 */
@@ -127,69 +125,31 @@ static inline void put_marker(PutBitContext *p, int code)
     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 const uint8_t ff_mjpeg_bits_dc_luminance[];
+extern const uint8_t ff_mjpeg_val_dc[];
+
+extern const uint8_t ff_mjpeg_bits_dc_chrominance[];
+
+extern const uint8_t ff_mjpeg_bits_ac_luminance[];
+extern const uint8_t ff_mjpeg_val_ac_luminance[];
+
+extern const uint8_t ff_mjpeg_bits_ac_chrominance[];
+extern const uint8_t ff_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 */