Initial revision

Originally committed as revision 5 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 273 insertions, 0 deletions

diff --git a/libavcodec/mpegvideo.h b/libavcodec/mpegvideo.h
new file mode 100644
index 0000000000..b04d7b7693
--- /dev/null
+++ b/libavcodec/mpegvideo.h
@@ -0,0 +1,273 @@
+/*
+ * Generic DCT based hybrid video encoder
+ * Copyright (c) 2000,2001 Gerard Lantau.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* Macros for picture code type. */
+#define I_TYPE 1
+#define P_TYPE 2
+#define B_TYPE 3
+
+enum OutputFormat {
+    FMT_MPEG1,
+    FMT_H263,
+    FMT_MJPEG,
+};
+
+#define MPEG_BUF_SIZE (16 * 1024)
+
+typedef struct MpegEncContext {
+    /* the following parameters must be initialized before encoding */
+    int width, height; /* picture size. must be a multiple of 16 */
+    int gop_size;
+    int frame_rate; /* number of frames per second */
+    int intra_only; /* if true, only intra pictures are generated */
+    int bit_rate;        /* wanted bit rate */
+    enum OutputFormat out_format; /* output format */
+    int h263_plus; /* h263 plus headers */
+    int h263_rv10; /* use RV10 variation for H263 */
+    int h263_pred; /* use OpenDIVX (aka mpeg4) ac/dc predictions */
+    int h263_msmpeg4; /* generate MSMPEG4 compatible stream */
+    int h263_intel; /* use I263 intel h263 header */
+    int fixed_qscale; /* fixed qscale if non zero */
+    /* the following fields are managed internally by the encoder */
+
+    /* bit output */
+    PutBitContext pb;
+
+    /* sequence parameters */
+    int context_initialized;
+    int picture_number;
+    int fake_picture_number; /* picture number at the bitstream frame rate */
+    int gop_picture_number; /* index of the first picture of a GOP */
+    int mb_width, mb_height;
+    int linesize;              /* line size, in bytes, may be different from width */
+    UINT8 *new_picture[3];     /* picture to be compressed */
+    UINT8 *last_picture[3];    /* previous picture */
+    UINT8 *last_picture_base[3]; /* real start of the picture */
+    UINT8 *next_picture[3];    /* previous picture (for bidir pred) */
+    UINT8 *next_picture_base[3]; /* real start of the picture */
+    UINT8 *aux_picture[3];    /* aux picture (for B frames only) */
+    UINT8 *aux_picture_base[3]; /* real start of the picture */
+    UINT8 *current_picture[3]; /* buffer to store the decompressed current picture */
+    int last_dc[3]; /* last DC values for MPEG1 */
+    INT16 *dc_val[3]; /* used for mpeg4 DC prediction */
+    int y_dc_scale, c_dc_scale;
+    UINT8 *coded_block; /* used for coded block pattern prediction */
+    INT16 (*ac_val[3])[16]; /* used for for mpeg4 AC prediction */
+    int ac_pred;
+
+    int qscale;
+    int pict_type;
+    int frame_rate_index;
+    /* motion compensation */
+    int unrestricted_mv;
+    int h263_long_vectors; /* use horrible h263v1 long vector mode */
+
+    int f_code; /* resolution */
+    INT16 (*motion_val)[2]; /* used for MV prediction */
+    int full_search;
+    int mv_dir;
+#define MV_DIR_BACKWARD  1
+#define MV_DIR_FORWARD   2
+    int mv_type;
+#define MV_TYPE_16X16       0   /* 1 vector for the whole mb */
+#define MV_TYPE_8X8         1   /* 4 vectors (h263) */
+#define MV_TYPE_16X8        2   /* 2 vectors, one per 16x8 block */ 
+#define MV_TYPE_FIELD       3   /* 2 vectors, one per field */ 
+#define MV_TYPE_DMV         4   /* 2 vectors, special mpeg2 Dual Prime Vectors */
+    /* motion vectors for a macroblock 
+       first coordinate : 0 = forward 1 = backward
+       second "         : depend on type
+       third  "         : 0 = x, 1 = y
+    */
+    int mv[2][4][2];
+    int field_select[2][2];
+    int last_mv[2][2][2];
+
+    int has_b_frames;
+    int no_rounding; /* apply no rounding to motion estimation (MPEG4) */
+
+    /* macroblock layer */
+    int mb_x, mb_y;
+    int mb_incr;
+    int mb_intra;
+    /* matrix transmitted in the bitstream */
+    UINT16 intra_matrix[64];
+    UINT16 chroma_intra_matrix[64];
+    UINT16 non_intra_matrix[64];
+    UINT16 chroma_non_intra_matrix[64];
+    /* precomputed matrix (combine qscale and DCT renorm) */
+    int q_intra_matrix[64];
+    int q_non_intra_matrix[64];
+    int block_last_index[6];  /* last non zero coefficient in block */
+
+    void *opaque; /* private data for the user */
+
+    /* bit rate control */
+    int I_frame_bits;    /* wanted number of bits per I frame */
+    int P_frame_bits;    /* same for P frame */
+    long long wanted_bits;
+    long long total_bits;
+
+    /* mpeg4 specific */
+    int time_increment_bits;
+
+    /* RV10 specific */
+    int rv10_version; /* RV10 version: 0 or 3 */
+    int rv10_first_dc_coded[3];
+    
+    /* MJPEG specific */
+    struct MJpegContext *mjpeg_ctx;
+
+    /* MSMPEG4 specific */
+    int mv_table_index;
+    int rl_table_index;
+    int rl_chroma_table_index;
+    int dc_table_index;
+    int use_skip_mb_code;
+    int slice_height;      /* in macroblocks */
+    int first_slice_line;  
+    /* decompression specific */
+    GetBitContext gb;
+
+    /* MPEG2 specific - I wish I had not to support this mess. */
+    int progressive_sequence;
+    int mpeg_f_code[2][2];
+    int picture_structure;
+/* picture type */
+#define PICT_TOP_FIELD     1
+#define PICT_BOTTOM_FIELD  2
+#define PICT_FRAME         3
+
+    int intra_dc_precision;
+    int frame_pred_frame_dct;
+    int top_field_first;
+    int concealment_motion_vectors;
+    int q_scale_type;
+    int intra_vlc_format;
+    int alternate_scan;
+    int repeat_first_field;
+    int chroma_420_type;
+    int progressive_frame;
+    int mpeg2;
+    int full_pel[2];
+    int interlaced_dct;
+    int last_qscale;
+    int first_slice;
+} MpegEncContext;
+
+extern const UINT8 zigzag_direct[64];
+
+int MPV_common_init(MpegEncContext *s);
+void MPV_common_end(MpegEncContext *s);
+void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64]);
+void MPV_frame_start(MpegEncContext *s);
+void MPV_frame_end(MpegEncContext *s);
+
+/* motion_est.c */
+
+int estimate_motion(MpegEncContext *s, 
+                    int mb_x, int mb_y,
+                    int *mx_ptr, int *my_ptr);
+
+/* mpeg12.c */
+extern const UINT8 default_intra_matrix[64];
+extern const UINT8 default_non_intra_matrix[64];
+
+void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
+void mpeg1_encode_mb(MpegEncContext *s,
+                     DCTELEM block[6][64],
+                     int motion_x, int motion_y);
+
+/* h263enc.c */
+
+/* run length table */
+#define MAX_RUN    64
+#define MAX_LEVEL  64
+
+typedef struct RLTable {
+    int n; /* number of entries of table_vlc minus 1 */
+    int last; /* number of values for last = 0 */
+    const UINT16 (*table_vlc)[2];
+    const INT8 *table_run;
+    const INT8 *table_level;
+    UINT8 *index_run[2]; /* encoding only */
+    INT8 *max_level[2]; /* encoding & decoding */
+    INT8 *max_run[2];   /* encoding & decoding */
+    VLC vlc;            /* decoding only */
+} RLTable;
+
+void init_rl(RLTable *rl);
+void init_vlc_rl(RLTable *rl);
+
+extern inline int get_rl_index(const RLTable *rl, int last, int run, int level)
+{
+    int index;
+    index = rl->index_run[last][run];
+    if (index >= rl->n)
+        return rl->n;
+    if (level > rl->max_level[last][run])
+        return rl->n;
+    return index + level - 1;
+}
+
+void h263_encode_mb(MpegEncContext *s, 
+                    DCTELEM block[6][64],
+                    int motion_x, int motion_y);
+void h263_encode_picture_header(MpegEncContext *s, int picture_number);
+void h263_dc_scale(MpegEncContext *s);
+INT16 *h263_pred_motion(MpegEncContext * s, int block, 
+                        int *px, int *py);
+void mpeg4_pred_ac(MpegEncContext * s, INT16 *block, int n, 
+                   int dir);
+void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
+void h263_encode_init_vlc(MpegEncContext *s);
+
+void h263_decode_init_vlc(MpegEncContext *s);
+int h263_decode_picture_header(MpegEncContext *s);
+int mpeg4_decode_picture_header(MpegEncContext * s);
+int intel_h263_decode_picture_header(MpegEncContext *s);
+int h263_decode_mb(MpegEncContext *s,
+                   DCTELEM block[6][64]);
+int h263_get_picture_format(int width, int height);
+extern UINT8 ff_alternate_horizontal_scan[64];
+extern UINT8 ff_alternate_vertical_scan[64];
+
+/* rv10.c */
+void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
+int rv_decode_dc(MpegEncContext *s, int n);
+
+/* msmpeg4.c */
+void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
+void msmpeg4_encode_mb(MpegEncContext * s, 
+                       DCTELEM block[6][64],
+                       int motion_x, int motion_y);
+void msmpeg4_dc_scale(MpegEncContext * s);
+int msmpeg4_decode_picture_header(MpegEncContext * s);
+int msmpeg4_decode_mb(MpegEncContext *s, 
+                      DCTELEM block[6][64]);
+int msmpeg4_decode_init_vlc(MpegEncContext *s);
+
+/* mjpegenc.c */
+
+int mjpeg_init(MpegEncContext *s);
+void mjpeg_close(MpegEncContext *s);
+void mjpeg_encode_mb(MpegEncContext *s, 
+                     DCTELEM block[6][64]);
+void mjpeg_picture_header(MpegEncContext *s);
+void mjpeg_picture_trailer(MpegEncContext *s);