mirror of
https://git.videolan.org/git/ffmpeg.git
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516 lines
20 KiB
C
516 lines
20 KiB
C
/*
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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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#define FRAME_SKIPED 100 // return value for header parsers if frame is not coded
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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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#define QMAT_SHIFT_MMX 19
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#define QMAT_SHIFT 25
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#define MAX_FCODE 7
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#define MAX_MV 2048
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#define REORDER_BUFFER_SIZE (FF_MAX_B_FRAMES+2)
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typedef struct Predictor{
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double coeff;
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double count;
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double decay;
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} Predictor;
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typedef struct RateControlEntry{
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int pict_type;
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int qscale;
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int mv_bits;
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int i_tex_bits;
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int p_tex_bits;
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int misc_bits;
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uint64_t expected_bits;
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int new_pict_type;
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float new_qscale;
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}RateControlEntry;
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typedef struct RateControlContext{
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FILE *stats_file;
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int num_entries;
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RateControlEntry *entry;
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}RateControlContext;
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typedef struct ReorderBuffer{
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UINT8 *picture[3];
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int pict_type;
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int qscale;
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int force_type;
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int picture_number;
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int picture_in_gop_number;
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} ReorderBuffer;
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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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int bit_rate_tolerance; /* amount of +- bits (>0)*/
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enum OutputFormat out_format; /* output format */
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int h263_pred; /* use mpeg4/h263 ac/dc predictions */
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/* the following codec id fields are deprecated in favor of codec_id */
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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_msmpeg4; /* generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)*/
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int h263_intel; /* use I263 intel h263 header */
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int codec_id; /* see CODEC_ID_xxx */
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int fixed_qscale; /* fixed qscale if non zero */
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float qcompress; /* amount of qscale change between easy & hard scenes (0.0-1.0) */
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float qblur; /* amount of qscale smoothing over time (0.0-1.0) */
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int qmin; /* min qscale */
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int qmax; /* max qscale */
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int max_qdiff; /* max qscale difference between frames */
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int encoding; /* true if we are encoding (vs decoding) */
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int flags; /* AVCodecContext.flags (HQ, MV4, ...) */
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int force_input_type;/* 0= no force, otherwise I_TYPE, P_TYPE, ... */
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int max_b_frames; /* max number of b-frames for encoding */
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float b_quant_factor;/* qscale factor between ips and b frames */
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int rc_strategy;
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int b_frame_strategy;
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int workaround_bugs; /* workaround bugs in encoders which cannot be detected automatically */
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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 input_picture_number;
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int input_picture_in_gop_number; /* 0-> first pic in gop, ... */
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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 based on fake_pic_num & mpeg1 specific */
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int picture_in_gop_number; /* 0-> first pic in gop, ... */
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int b_frames_since_non_b; /* used for encoding, relative to not yet reordered input */
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int mb_width, mb_height; /* number of MBs horizontally & vertically */
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int mb_num; /* number of MBs of a picture */
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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 *picture_buffer[REORDER_BUFFER_SIZE][3]; /* internal buffers used for reordering of input pictures */
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int picture_buffer_index;
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ReorderBuffer coded_order[REORDER_BUFFER_SIZE];
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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 num_available_buffers; /* is 0 at the start & after seeking, after the first I frame its 1 after next I/P 2 */
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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, all 3 arrays must be continuous */
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int y_dc_scale, c_dc_scale;
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UINT8 *coded_block; /* used for coded block pattern prediction (msmpeg4v3, wmv1)*/
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INT16 (*ac_val[3])[16]; /* used for for mpeg4 AC prediction, all 3 arrays must be continuous */
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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 skipped (for black regions for example)
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and used for b-frame encoding & decoding (contains skip table of next P Frame) */
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UINT8 *mbintra_table; /* used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding */
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int input_qscale; /* qscale prior to reordering of frames */
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int input_pict_type; /* pict_type prior to reordering of frames */
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int force_type; /* 0= no force, otherwise I_TYPE, P_TYPE, ... */
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int qscale; /* QP */
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int last_non_b_qscale; /* QP of last non b frame used for b frame qscale*/
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int pict_type; /* I_TYPE, P_TYPE, B_TYPE, ... */
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int last_non_b_pict_type; /* used for mpeg4 gmc b-frames & ratecontrol */
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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; /* forward MV resolution */
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int b_code; /* backward MV resolution for B Frames (mpeg4) */
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INT16 (*motion_val)[2]; /* used for MV prediction (4MV per MB) */
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INT16 (*p_mv_table)[2]; /* MV table (1MV per MB) p-frame encoding */
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INT16 (*last_p_mv_table)[2]; /* MV table (1MV per MB) p-frame encoding */
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INT16 (*b_forw_mv_table)[2]; /* MV table (1MV per MB) forward mode b-frame encoding */
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INT16 (*b_back_mv_table)[2]; /* MV table (1MV per MB) backward mode b-frame encoding */
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INT16 (*b_bidir_forw_mv_table)[2]; /* MV table (1MV per MB) bidir mode b-frame encoding */
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INT16 (*b_bidir_back_mv_table)[2]; /* MV table (1MV per MB) bidir mode b-frame encoding */
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INT16 (*b_direct_forw_mv_table)[2];/* MV table (1MV per MB) direct mode b-frame encoding */
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INT16 (*b_direct_back_mv_table)[2];/* MV table (1MV per MB) direct mode b-frame encoding */
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INT16 (*b_direct_mv_table)[2]; /* MV table (1MV per MB) direct mode b-frame encoding */
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int me_method; /* ME algorithm */
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uint8_t *me_scratchpad; /* data area for the me algo, so that the ME doesnt need to malloc/free */
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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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#define MV_DIRECT 4 // bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
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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, mpeg4 4MV) */
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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]; /* last MV, used for MV prediction in MPEG1 & B-frame MPEG4 */
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UINT16 (*mv_penalty)[MAX_MV*2+1]; /* amount of bits needed to encode a MV, used for ME */
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UINT8 *fcode_tab; /* smallest fcode needed for each MV */
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int has_b_frames;
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int no_rounding; /* apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
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for b-frames rounding mode is allways 0 */
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int hurry_up; /* when set to 1 during decoding, b frames will be skiped
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when set to 2 idct/dequant will be skipped too */
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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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UINT16 *mb_var; /* Table for MB variances */
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UINT8 *mb_type; /* Table for MB type */
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#define MB_TYPE_INTRA 0x01
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#define MB_TYPE_INTER 0x02
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#define MB_TYPE_INTER4V 0x04
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#define MB_TYPE_SKIPED 0x08
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#define MB_TYPE_DIRECT 0x10
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#define MB_TYPE_FORWARD 0x20
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#define MB_TYPE_BACKWARD 0x40
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#define MB_TYPE_BIDIR 0x80
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int block_index[6]; /* index to current MB in block based arrays with edges*/
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int block_wrap[6];
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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 inter_matrix[64];
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UINT16 chroma_inter_matrix[64];
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#define QUANT_BIAS_SHIFT 4
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int intra_quant_bias; /* bias for the quantizer */
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int inter_quant_bias; /* bias for the quantizer */
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int min_qcoeff; /* minimum encodable coefficient */
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int max_qcoeff; /* maximum encodable coefficient */
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/* precomputed matrix (combine qscale and DCT renorm) */
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int q_intra_matrix[32][64];
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int q_inter_matrix[32][64];
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/* identical to the above but for MMX & these are not permutated */
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UINT16 __align8 q_intra_matrix16[32][64];
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UINT16 __align8 q_inter_matrix16[32][64];
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UINT16 __align8 q_intra_matrix16_bias[32][64];
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UINT16 __align8 q_inter_matrix16_bias[32][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; //FIXME used in mpeg12 ...
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int avg_mb_var; /* average MB variance for current frame */
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int mc_mb_var; /* motion compensated MB variance for current frame */
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int last_non_b_mc_mb_var;/* motion compensated MB variance for last non b frame */
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INT64 wanted_bits;
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INT64 total_bits;
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int frame_bits; /* bits used for the current frame */
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int pb_frame_bits; /* bits of the last b...bp group */
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Predictor i_pred;
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Predictor p_pred;
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double qsum; /* sum of qscales */
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double qcount; /* count of qscales */
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double short_term_qsum; /* sum of recent qscales */
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double short_term_qcount; /* count of recent qscales */
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RateControlContext rc_context;
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/* statistics, used for 2-pass encoding */
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int mv_bits;
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int header_bits;
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int i_tex_bits;
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int p_tex_bits;
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int i_count;
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int p_count;
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int skip_count;
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int misc_bits; // cbp, mb_type
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int last_bits; //temp var used for calculating the above vars
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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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int h263_aic; /* Advanded INTRA Coding (AIC) */
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int h263_aic_dir; /* AIC direction: 0 = left, 1 = top */
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/* mpeg4 specific */
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int time_increment_resolution;
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int time_increment_bits; /* number of bits to represent the fractional part of time */
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int last_time_base;
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int time_base; /* time in seconds of last I,P,S Frame */
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int64_t time; /* time of current frame */
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int64_t last_non_b_time;
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uint16_t pp_time; /* time distance between the last 2 p,s,i frames */
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uint16_t bp_time; /* time distance between the last b and p,s,i frame */
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int shape;
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int vol_sprite_usage;
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int sprite_width;
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int sprite_height;
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int sprite_left;
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int sprite_top;
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int sprite_brightness_change;
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int num_sprite_warping_points;
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int real_sprite_warping_points;
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int sprite_offset[2][2];
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int sprite_delta[2][2][2];
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int sprite_shift[2][2];
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int mcsel;
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int quant_precision;
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int quarter_sample; /* 1->qpel, 0->half pel ME/MC */
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int scalability;
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int new_pred;
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int reduced_res_vop;
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int aspect_ratio_info;
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int sprite_warping_accuracy;
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int low_latency_sprite;
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int data_partioning;
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int resync_marker;
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int resync_x_pos;
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int low_delay; /* no reordering needed / has no b-frames */
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int vo_type;
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int vol_control_parameters; /* does the stream contain the low_delay flag, used to workaround buggy encoders */
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/* divx specific, used to workaround (many) bugs in divx5 */
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int divx_version;
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int divx_build;
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#define BITSTREAM_BUFFER_SIZE 1024*256
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uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
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int bitstream_buffer_size;
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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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int mjpeg_vsample[3]; /* vertical sampling factors, default = {2, 1, 1} */
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int mjpeg_hsample[3]; /* horizontal sampling factors, default = {2, 1, 1} */
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int mjpeg_write_tables; /* do we want to have quantisation- and
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huffmantables in the jpeg file ? */
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int mjpeg_data_only_frames; /* frames only with SOI, SOS and EOI markers */
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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; /* used in mpeg4 too to handle resync markers */
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int flipflop_rounding;
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int bitrate;
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int msmpeg4_version; /* 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 */
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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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/* These are explained on avcodec.h */
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int rtp_mode;
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int rtp_payload_size;
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void (*rtp_callback)(void *data, int size, int packet_number);
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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)[64]; /* points to one of the following blocks */
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DCTELEM blocks[2][6][64] __align8; // for HQ mode we need to keep the best block
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void (*dct_unquantize_mpeg1)(struct MpegEncContext *s,
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DCTELEM *block, int n, int qscale);
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void (*dct_unquantize_mpeg2)(struct MpegEncContext *s,
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DCTELEM *block, int n, int qscale);
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void (*dct_unquantize_h263)(struct MpegEncContext *s,
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DCTELEM *block, int n, int qscale);
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void (*dct_unquantize)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
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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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int (*dct_quantize)(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);
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void (*draw_edges)(UINT8 *buf, int wrap, int width, int height, int w);
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/* motion_est.c */
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void ff_estimate_p_frame_motion(MpegEncContext * s,
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int mb_x, int mb_y);
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void ff_estimate_b_frame_motion(MpegEncContext * s,
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int mb_x, int mb_y);
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int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
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void ff_fix_long_p_mvs(MpegEncContext * s);
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void ff_fix_long_b_mvs(MpegEncContext * s, int16_t (*mv_table)[2], int f_code, int type);
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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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void mpeg1_encode_init(MpegEncContext *s);
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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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static 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 mpeg4_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 ff_set_mpeg4_time(MpegEncContext * s, int picture_number);
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void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
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void h263_encode_init(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_ext_header(MpegEncContext * s);
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void msmpeg4_encode_mb(MpegEncContext * s,
|
|
DCTELEM block[6][64],
|
|
int motion_x, int motion_y);
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int msmpeg4_decode_picture_header(MpegEncContext * s);
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int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
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int msmpeg4_decode_mb(MpegEncContext *s,
|
|
DCTELEM block[6][64]);
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|
int msmpeg4_decode_init_vlc(MpegEncContext *s);
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void ff_old_msmpeg4_dc_scale(MpegEncContext *s);
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|
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/* mjpegenc.c */
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|
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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,
|
|
DCTELEM block[6][64]);
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void mjpeg_picture_header(MpegEncContext *s);
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void mjpeg_picture_trailer(MpegEncContext *s);
|
|
|
|
/* rate control */
|
|
int ff_rate_control_init(MpegEncContext *s);
|
|
int ff_rate_estimate_qscale(MpegEncContext *s);
|
|
int ff_rate_estimate_qscale_pass2(MpegEncContext *s);
|
|
void ff_write_pass1_stats(MpegEncContext *s);
|
|
void ff_rate_control_uninit(MpegEncContext *s);
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