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303 lines
10 KiB
303 lines
10 KiB
/* |
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* Generic DCT based hybrid video encoder |
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* Copyright (c) 2000,2001 Gerard Lantau. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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/* Macros for picture code type. */ |
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#define I_TYPE 1 |
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#define P_TYPE 2 |
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#define B_TYPE 3 |
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enum OutputFormat { |
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FMT_MPEG1, |
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FMT_H263, |
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FMT_MJPEG, |
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}; |
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#define MPEG_BUF_SIZE (16 * 1024) |
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typedef struct MpegEncContext { |
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struct AVCodecContext *avctx; |
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/* the following parameters must be initialized before encoding */ |
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int width, height; /* picture size. must be a multiple of 16 */ |
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int gop_size; |
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int frame_rate; /* number of frames per second */ |
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int intra_only; /* if true, only intra pictures are generated */ |
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int bit_rate; /* wanted bit rate */ |
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enum OutputFormat out_format; /* output format */ |
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int h263_plus; /* h263 plus headers */ |
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int h263_rv10; /* use RV10 variation for H263 */ |
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int h263_pred; /* use mpeg4/h263 ac/dc predictions */ |
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int h263_msmpeg4; /* generate MSMPEG4 compatible stream */ |
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int h263_intel; /* use I263 intel h263 header */ |
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int fixed_qscale; /* fixed qscale if non zero */ |
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int encoding; /* true if we are encoding (vs decoding) */ |
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/* the following fields are managed internally by the encoder */ |
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/* bit output */ |
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PutBitContext pb; |
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/* sequence parameters */ |
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int context_initialized; |
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int picture_number; |
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int fake_picture_number; /* picture number at the bitstream frame rate */ |
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int gop_picture_number; /* index of the first picture of a GOP */ |
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int mb_width, mb_height; |
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int linesize; /* line size, in bytes, may be different from width */ |
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UINT8 *new_picture[3]; /* picture to be compressed */ |
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UINT8 *last_picture[3]; /* previous picture */ |
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UINT8 *last_picture_base[3]; /* real start of the picture */ |
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UINT8 *next_picture[3]; /* previous picture (for bidir pred) */ |
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UINT8 *next_picture_base[3]; /* real start of the picture */ |
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UINT8 *aux_picture[3]; /* aux picture (for B frames only) */ |
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UINT8 *aux_picture_base[3]; /* real start of the picture */ |
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UINT8 *current_picture[3]; /* buffer to store the decompressed current picture */ |
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int last_dc[3]; /* last DC values for MPEG1 */ |
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INT16 *dc_val[3]; /* used for mpeg4 DC prediction */ |
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int y_dc_scale, c_dc_scale; |
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UINT8 *coded_block; /* used for coded block pattern prediction */ |
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INT16 (*ac_val[3])[16]; /* used for for mpeg4 AC prediction */ |
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int ac_pred; |
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int mb_skiped; /* MUST BE SET only during DECODING */ |
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UINT8 *mbskip_table; /* used to avoid copy if macroblock |
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skipped (for black regions for example) */ |
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UINT8 *mbintra_table; /* used to kill a few memsets */ |
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int qscale; |
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int pict_type; |
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int frame_rate_index; |
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/* motion compensation */ |
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int unrestricted_mv; |
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int h263_long_vectors; /* use horrible h263v1 long vector mode */ |
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int f_code; /* resolution */ |
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INT16 (*motion_val)[2]; /* used for MV prediction */ |
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int full_search; |
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int mv_dir; |
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#define MV_DIR_BACKWARD 1 |
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#define MV_DIR_FORWARD 2 |
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int mv_type; |
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#define MV_TYPE_16X16 0 /* 1 vector for the whole mb */ |
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#define MV_TYPE_8X8 1 /* 4 vectors (h263) */ |
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#define MV_TYPE_16X8 2 /* 2 vectors, one per 16x8 block */ |
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#define MV_TYPE_FIELD 3 /* 2 vectors, one per field */ |
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#define MV_TYPE_DMV 4 /* 2 vectors, special mpeg2 Dual Prime Vectors */ |
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/* motion vectors for a macroblock |
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first coordinate : 0 = forward 1 = backward |
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second " : depend on type |
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third " : 0 = x, 1 = y |
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*/ |
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int mv[2][4][2]; |
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int field_select[2][2]; |
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int last_mv[2][2][2]; |
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int has_b_frames; |
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int no_rounding; /* apply no rounding to motion estimation (MPEG4) */ |
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/* macroblock layer */ |
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int mb_x, mb_y; |
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int mb_incr; |
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int mb_intra; |
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/* matrix transmitted in the bitstream */ |
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UINT16 intra_matrix[64]; |
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UINT16 chroma_intra_matrix[64]; |
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UINT16 non_intra_matrix[64]; |
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UINT16 chroma_non_intra_matrix[64]; |
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/* precomputed matrix (combine qscale and DCT renorm) */ |
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int q_intra_matrix[64]; |
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int q_non_intra_matrix[64]; |
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int block_last_index[6]; /* last non zero coefficient in block */ |
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void *opaque; /* private data for the user */ |
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/* bit rate control */ |
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int I_frame_bits; /* wanted number of bits per I frame */ |
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int P_frame_bits; /* same for P frame */ |
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INT64 wanted_bits; |
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INT64 total_bits; |
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/* H.263 specific */ |
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int gob_number; |
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int gob_index; |
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int first_gob_line; |
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/* H.263+ specific */ |
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int umvplus; |
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int umvplus_dec; |
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/* mpeg4 specific */ |
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int time_increment_bits; |
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int shape; |
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int vol_sprite_usage; |
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int quant_precision; |
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/* RV10 specific */ |
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int rv10_version; /* RV10 version: 0 or 3 */ |
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int rv10_first_dc_coded[3]; |
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/* MJPEG specific */ |
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struct MJpegContext *mjpeg_ctx; |
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/* MSMPEG4 specific */ |
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int mv_table_index; |
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int rl_table_index; |
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int rl_chroma_table_index; |
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int dc_table_index; |
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int use_skip_mb_code; |
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int slice_height; /* in macroblocks */ |
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int first_slice_line; |
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/* decompression specific */ |
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GetBitContext gb; |
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/* MPEG2 specific - I wish I had not to support this mess. */ |
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int progressive_sequence; |
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int mpeg_f_code[2][2]; |
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int picture_structure; |
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/* picture type */ |
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#define PICT_TOP_FIELD 1 |
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#define PICT_BOTTOM_FIELD 2 |
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#define PICT_FRAME 3 |
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int intra_dc_precision; |
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int frame_pred_frame_dct; |
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int top_field_first; |
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int concealment_motion_vectors; |
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int q_scale_type; |
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int intra_vlc_format; |
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int alternate_scan; |
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int repeat_first_field; |
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int chroma_420_type; |
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int progressive_frame; |
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int mpeg2; |
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int full_pel[2]; |
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int interlaced_dct; |
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int last_qscale; |
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int first_slice; |
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/* RTP specific */ |
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int rtp_mode; |
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int rtp_payload_size; |
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UINT8 *ptr_lastgob; |
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UINT8 *ptr_last_mb_line; |
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UINT32 mb_line_avgsize; |
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DCTELEM block[6][64] __align8; |
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void (*dct_unquantize)(struct MpegEncContext *s, |
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DCTELEM *block, int n, int qscale); |
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} MpegEncContext; |
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int MPV_common_init(MpegEncContext *s); |
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void MPV_common_end(MpegEncContext *s); |
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void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64]); |
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void MPV_frame_start(MpegEncContext *s); |
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void MPV_frame_end(MpegEncContext *s); |
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#ifdef HAVE_MMX |
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void MPV_common_init_mmx(MpegEncContext *s); |
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#endif |
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/* motion_est.c */ |
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int estimate_motion(MpegEncContext *s, |
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int mb_x, int mb_y, |
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int *mx_ptr, int *my_ptr); |
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/* mpeg12.c */ |
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extern INT16 default_intra_matrix[64]; |
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extern INT16 default_non_intra_matrix[64]; |
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void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number); |
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void mpeg1_encode_mb(MpegEncContext *s, |
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DCTELEM block[6][64], |
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int motion_x, int motion_y); |
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/* h263enc.c */ |
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/* run length table */ |
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#define MAX_RUN 64 |
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#define MAX_LEVEL 64 |
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typedef struct RLTable { |
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int n; /* number of entries of table_vlc minus 1 */ |
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int last; /* number of values for last = 0 */ |
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const UINT16 (*table_vlc)[2]; |
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const INT8 *table_run; |
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const INT8 *table_level; |
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UINT8 *index_run[2]; /* encoding only */ |
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INT8 *max_level[2]; /* encoding & decoding */ |
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INT8 *max_run[2]; /* encoding & decoding */ |
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VLC vlc; /* decoding only */ |
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} RLTable; |
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void init_rl(RLTable *rl); |
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void init_vlc_rl(RLTable *rl); |
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extern inline int get_rl_index(const RLTable *rl, int last, int run, int level) |
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{ |
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int index; |
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index = rl->index_run[last][run]; |
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if (index >= rl->n) |
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return rl->n; |
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if (level > rl->max_level[last][run]) |
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return rl->n; |
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return index + level - 1; |
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} |
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void h263_encode_mb(MpegEncContext *s, |
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DCTELEM block[6][64], |
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int motion_x, int motion_y); |
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void h263_encode_picture_header(MpegEncContext *s, int picture_number); |
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int h263_encode_gob_header(MpegEncContext * s, int mb_line); |
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void h263_dc_scale(MpegEncContext *s); |
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INT16 *h263_pred_motion(MpegEncContext * s, int block, |
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int *px, int *py); |
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void mpeg4_pred_ac(MpegEncContext * s, INT16 *block, int n, |
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int dir); |
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void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number); |
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void h263_encode_init_vlc(MpegEncContext *s); |
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void h263_decode_init_vlc(MpegEncContext *s); |
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int h263_decode_picture_header(MpegEncContext *s); |
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int h263_decode_gob_header(MpegEncContext *s); |
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int mpeg4_decode_picture_header(MpegEncContext * s); |
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int intel_h263_decode_picture_header(MpegEncContext *s); |
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int h263_decode_mb(MpegEncContext *s, |
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DCTELEM block[6][64]); |
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int h263_get_picture_format(int width, int height); |
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/* rv10.c */ |
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void rv10_encode_picture_header(MpegEncContext *s, int picture_number); |
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int rv_decode_dc(MpegEncContext *s, int n); |
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/* msmpeg4.c */ |
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void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number); |
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void msmpeg4_encode_mb(MpegEncContext * s, |
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DCTELEM block[6][64], |
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int motion_x, int motion_y); |
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void msmpeg4_dc_scale(MpegEncContext * s); |
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int msmpeg4_decode_picture_header(MpegEncContext * s); |
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int msmpeg4_decode_mb(MpegEncContext *s, |
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DCTELEM block[6][64]); |
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int msmpeg4_decode_init_vlc(MpegEncContext *s); |
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/* mjpegenc.c */ |
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int mjpeg_init(MpegEncContext *s); |
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void mjpeg_close(MpegEncContext *s); |
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void mjpeg_encode_mb(MpegEncContext *s, |
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DCTELEM block[6][64]); |
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void mjpeg_picture_header(MpegEncContext *s); |
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void mjpeg_picture_trailer(MpegEncContext *s);
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