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-rw-r--r--libavcodec/mpegvideo.h273
1 files changed, 273 insertions, 0 deletions
diff --git a/libavcodec/mpegvideo.h b/libavcodec/mpegvideo.h
new file mode 100644
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--- /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);
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