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619 lines
25 KiB
619 lines
25 KiB
/* |
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* Generic DCT based hybrid video encoder |
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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard |
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* Copyright (c) 2002-2004 Michael Niedermayer |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg 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 GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* mpegvideo header. |
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*/ |
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#ifndef AVCODEC_MPEGVIDEO_H |
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#define AVCODEC_MPEGVIDEO_H |
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#include "avcodec.h" |
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#include "blockdsp.h" |
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#include "error_resilience.h" |
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#include "fdctdsp.h" |
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#include "get_bits.h" |
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#include "h264chroma.h" |
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#include "h263dsp.h" |
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#include "hpeldsp.h" |
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#include "idctdsp.h" |
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#include "me_cmp.h" |
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#include "motion_est.h" |
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#include "mpegpicture.h" |
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#include "mpegvideoencdsp.h" |
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#include "pixblockdsp.h" |
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#include "put_bits.h" |
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#include "ratecontrol.h" |
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#if FF_API_FLAG_TRUNCATED |
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#include "parser.h" |
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#endif |
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#include "mpegutils.h" |
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#include "qpeldsp.h" |
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#include "videodsp.h" |
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#define MAX_THREADS 32 |
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#define MAX_B_FRAMES 16 |
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/** |
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* Scantable. |
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*/ |
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typedef struct ScanTable { |
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const uint8_t *scantable; |
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uint8_t permutated[64]; |
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uint8_t raster_end[64]; |
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} ScanTable; |
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/** |
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* MpegEncContext. |
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*/ |
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typedef struct MpegEncContext { |
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AVClass *class; |
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int y_dc_scale, c_dc_scale; |
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int ac_pred; |
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int block_last_index[12]; ///< last non zero coefficient in block |
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int h263_aic; ///< Advanced INTRA Coding (AIC) |
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/* scantables */ |
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ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce the cache usage |
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/* WARNING: changes above this line require updates to hardcoded |
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* offsets used in ASM. */ |
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ScanTable intra_scantable; |
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uint8_t permutated_intra_h_scantable[64]; |
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uint8_t permutated_intra_v_scantable[64]; |
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struct AVCodecContext *avctx; |
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/* The following pointer is intended for codecs sharing code |
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* between decoder and encoder and in need of a common context to do so. */ |
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void *private_ctx; |
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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 intra_only; ///< if true, only intra pictures are generated |
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int64_t bit_rate; ///< wanted bit rate |
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enum OutputFormat out_format; ///< output format |
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int h263_pred; ///< use MPEG-4/H.263 ac/dc predictions |
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int pb_frame; ///< PB-frame mode (0 = none, 1 = base, 2 = improved) |
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/* the following codec id fields are deprecated in favor of codec_id */ |
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int h263_plus; ///< H.263+ headers |
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int h263_flv; ///< use flv H.263 header |
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enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */ |
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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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int max_b_frames; ///< max number of B-frames for encoding |
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int luma_elim_threshold; |
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int chroma_elim_threshold; |
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int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically |
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int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag |
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/* the following fields are managed internally by the encoder */ |
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/* sequence parameters */ |
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int context_initialized; |
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int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else |
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int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else |
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int picture_number; //FIXME remove, unclear definition |
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int extradata_parsed; |
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int picture_in_gop_number; ///< 0-> first pic in gop, ... |
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int mb_width, mb_height; ///< number of MBs horizontally & vertically |
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int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 |
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int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing |
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int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication) |
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int mb_num; ///< number of MBs of a picture |
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ptrdiff_t linesize; ///< line size, in bytes, may be different from width |
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ptrdiff_t uvlinesize; ///< line size, for chroma in bytes, may be different from width |
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Picture *picture; ///< main picture buffer |
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Picture **input_picture; ///< next pictures on display order for encoding |
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Picture **reordered_input_picture; ///< pointer to the next pictures in coded order for encoding |
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int64_t user_specified_pts; ///< last non-zero pts from AVFrame which was passed into avcodec_send_frame() |
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/** |
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* pts difference between the first and second input frame, used for |
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* calculating dts of the first frame when there's a delay */ |
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int64_t dts_delta; |
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/** |
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* reordered pts to be used as dts for the next output frame when there's |
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* a delay */ |
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int64_t reordered_pts; |
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/** bit output */ |
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PutBitContext pb; |
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int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) |
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int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) |
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struct MpegEncContext *thread_context[MAX_THREADS]; |
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int slice_context_count; ///< number of used thread_contexts |
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/** |
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* copy of the previous picture structure. |
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* note, linesize & data, might not match the previous picture (for field pictures) |
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*/ |
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Picture last_picture; |
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/** |
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* copy of the next picture structure. |
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* note, linesize & data, might not match the next picture (for field pictures) |
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*/ |
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Picture next_picture; |
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/** |
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* Reference to the source picture for encoding. |
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* note, linesize & data, might not match the source picture (for field pictures) |
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*/ |
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AVFrame *new_picture; |
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/** |
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* copy of the current picture structure. |
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* note, linesize & data, might not match the current picture (for field pictures) |
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*/ |
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Picture current_picture; ///< buffer to store the decompressed current picture |
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Picture *last_picture_ptr; ///< pointer to the previous picture. |
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Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred) |
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Picture *current_picture_ptr; ///< pointer to the current picture |
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int skipped_last_frame; |
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int last_dc[3]; ///< last DC values for MPEG-1 |
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int16_t *dc_val_base; |
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int16_t *dc_val[3]; ///< used for MPEG-4 DC prediction, all 3 arrays must be continuous |
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const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table |
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const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table |
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const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (H.263) |
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uint8_t *coded_block_base; |
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uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1) |
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int16_t (*ac_val_base)[16]; |
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int16_t (*ac_val[3])[16]; ///< used for MPEG-4 AC prediction, all 3 arrays must be continuous |
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int mb_skipped; ///< MUST BE SET only during DECODING |
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uint8_t *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_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding |
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uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding |
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uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding |
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ScratchpadContext sc; |
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int qscale; ///< QP |
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int chroma_qscale; ///< chroma QP |
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unsigned int lambda; ///< Lagrange multiplier used in rate distortion |
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unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT |
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int *lambda_table; |
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int adaptive_quant; ///< use adaptive quantization |
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int dquant; ///< qscale difference to prev qscale |
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int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ... |
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int vbv_delay; |
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int last_pict_type; //FIXME removes |
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int last_non_b_pict_type; ///< used for MPEG-4 gmc B-frames & ratecontrol |
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int droppable; |
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int last_lambda_for[5]; ///< last lambda for a specific pict type |
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int skipdct; ///< skip dct and code zero residual |
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/* motion compensation */ |
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int unrestricted_mv; ///< mv can point outside of the coded picture |
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int h263_long_vectors; ///< use horrible H.263v1 long vector mode |
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BlockDSPContext bdsp; |
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FDCTDSPContext fdsp; |
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H264ChromaContext h264chroma; |
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HpelDSPContext hdsp; |
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IDCTDSPContext idsp; |
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MECmpContext mecc; |
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MpegvideoEncDSPContext mpvencdsp; |
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PixblockDSPContext pdsp; |
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QpelDSPContext qdsp; |
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VideoDSPContext vdsp; |
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H263DSPContext h263dsp; |
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int f_code; ///< forward MV resolution |
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int b_code; ///< backward MV resolution for B-frames (MPEG-4) |
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int16_t (*p_mv_table_base)[2]; |
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int16_t (*b_forw_mv_table_base)[2]; |
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int16_t (*b_back_mv_table_base)[2]; |
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int16_t (*b_bidir_forw_mv_table_base)[2]; |
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int16_t (*b_bidir_back_mv_table_base)[2]; |
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int16_t (*b_direct_mv_table_base)[2]; |
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int16_t (*p_field_mv_table_base)[2]; |
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int16_t (*b_field_mv_table_base)[2]; |
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int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) P-frame encoding |
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int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode B-frame encoding |
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int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode B-frame encoding |
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int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode B-frame encoding |
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int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode B-frame encoding |
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int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode B-frame encoding |
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int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced P-frame encoding |
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int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced B-frame encoding |
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uint8_t (*p_field_select_table[2]); ///< Only the first element is allocated |
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uint8_t (*b_field_select_table[2][2]); ///< Only the first element is allocated |
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/* The following fields are encoder-only */ |
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uint16_t *mb_var; ///< Table for MB variances |
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uint16_t *mc_mb_var; ///< Table for motion compensated MB variances |
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uint8_t *mb_mean; ///< Table for MB luminance |
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int64_t mb_var_sum; ///< sum of MB variance for current frame |
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int64_t mc_mb_var_sum; ///< motion compensated MB variance for current frame |
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uint64_t encoding_error[MPEGVIDEO_MAX_PLANES]; |
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int motion_est; ///< ME algorithm |
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int me_penalty_compensation; |
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int me_pre; ///< prepass for motion estimation |
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int mv_dir; |
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#define MV_DIR_FORWARD 1 |
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#define MV_DIR_BACKWARD 2 |
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#define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (MPEG-4) |
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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 (H.263, MPEG-4 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 MPEG-1 & B-frame MPEG-4 |
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const uint8_t *fcode_tab; ///< smallest fcode needed for each MV |
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int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv |
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MotionEstContext me; |
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int no_rounding; /**< apply no rounding to motion compensation (MPEG-4, msmpeg4, ...) |
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for B-frames rounding mode is always 0 */ |
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/* macroblock layer */ |
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int mb_x, mb_y; |
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int mb_skip_run; |
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int mb_intra; |
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uint16_t *mb_type; ///< Table for candidate MB types for encoding (defines in mpegutils.h) |
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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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uint8_t *dest[3]; |
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int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride |
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/** matrix transmitted in the bitstream */ |
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uint16_t intra_matrix[64]; |
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uint16_t chroma_intra_matrix[64]; |
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uint16_t inter_matrix[64]; |
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uint16_t chroma_inter_matrix[64]; |
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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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int ac_esc_length; ///< num of bits needed to encode the longest esc |
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uint8_t *intra_ac_vlc_length; |
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uint8_t *intra_ac_vlc_last_length; |
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uint8_t *intra_chroma_ac_vlc_length; |
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uint8_t *intra_chroma_ac_vlc_last_length; |
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uint8_t *inter_ac_vlc_length; |
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uint8_t *inter_ac_vlc_last_length; |
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uint8_t *luma_dc_vlc_length; |
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int coded_score[12]; |
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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_chroma_intra_matrix)[64]; |
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int (*q_inter_matrix)[64]; |
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/** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/ |
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uint16_t (*q_intra_matrix16)[2][64]; |
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uint16_t (*q_chroma_intra_matrix16)[2][64]; |
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uint16_t (*q_inter_matrix16)[2][64]; |
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/* noise reduction */ |
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int (*dct_error_sum)[64]; |
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int dct_count[2]; |
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uint16_t (*dct_offset)[64]; |
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/* bit rate control */ |
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int64_t total_bits; |
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int frame_bits; ///< bits used for the current frame |
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int stuffing_bits; ///< bits used for stuffing |
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int next_lambda; ///< next lambda used for retrying to encode a frame |
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RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c |
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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 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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/* error concealment / resync */ |
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int resync_mb_x; ///< x position of last resync marker |
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int resync_mb_y; ///< y position of last resync marker |
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GetBitContext last_resync_gb; ///< used to search for the next resync marker |
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int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only) |
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#if FF_API_FLAG_TRUNCATED |
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ParseContext parse_context; |
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#endif |
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/* H.263 specific */ |
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int gob_index; |
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int obmc; ///< overlapped block motion compensation |
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int mb_info; ///< interval for outputting info about mb offsets as side data |
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int prev_mb_info, last_mb_info; |
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uint8_t *mb_info_ptr; |
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int mb_info_size; |
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int ehc_mode; |
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/* H.263+ specific */ |
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int umvplus; ///< == H.263+ && unrestricted_mv |
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int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top |
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int h263_slice_structured; |
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int alt_inter_vlc; ///< alternative inter vlc |
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int modified_quant; |
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int loop_filter; |
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int custom_pcf; |
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/* MPEG-4 specific */ |
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int studio_profile; |
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int dct_precision; |
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///< number of bits to represent the fractional part of time (encoder only) |
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int time_increment_bits; |
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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 pb_time; ///< time distance between the last b and p,s,i frame |
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uint16_t pp_field_time; |
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uint16_t pb_field_time; ///< like above, just for interlaced |
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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 data_partitioning; ///< data partitioning flag from header |
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int partitioned_frame; ///< is current frame partitioned |
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int low_delay; ///< no reordering needed / has no B-frames |
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PutBitContext tex_pb; ///< used for data partitioned VOPs |
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PutBitContext pb2; ///< used for data partitioned VOPs |
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int mpeg_quant; |
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int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG-4 |
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/* divx specific, used to workaround (many) bugs in divx5 */ |
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int divx_packed; |
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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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unsigned int allocated_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 esc_pos; |
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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 MPEG-4 too to handle resync markers |
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int flipflop_rounding; |
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int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8 |
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int per_mb_rl_table; |
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int esc3_level_length; |
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int esc3_run_length; |
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int inter_intra_pred; |
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int mspel; |
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/* decompression specific */ |
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GetBitContext gb; |
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/* MPEG-1 specific */ |
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int last_mv_dir; ///< last mv_dir, used for B-frame encoding |
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int vbv_delay_pos; ///< offset of vbv_delay in the bitstream |
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/* MPEG-2-specific - I wished not to have 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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// picture structure defines are loaded from mpegutils.h |
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int picture_structure; |
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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 brd_scale; |
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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 chroma_format; |
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#define CHROMA_420 1 |
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#define CHROMA_422 2 |
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#define CHROMA_444 3 |
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int chroma_x_shift;//depend on pix_format, that depend on chroma_format |
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int chroma_y_shift; |
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int progressive_frame; |
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int full_pel[2]; |
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int interlaced_dct; |
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int first_field; ///< is 1 for the first field of a field picture 0 otherwise |
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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_t *ptr_lastgob; |
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int16_t (*pblocks[12])[64]; |
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int16_t (*block)[64]; ///< points to one of the following blocks |
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int16_t (*blocks)[12][64]; // for HQ mode we need to keep the best block |
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int (*decode_mb)(struct MpegEncContext *s, int16_t block[12][64]); // used by some codecs to avoid a switch() |
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#define SLICE_OK 0 |
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#define SLICE_ERROR -1 |
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#define SLICE_END -2 ///<end marker found |
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#define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded |
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void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s, |
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int16_t *block/*align 16*/, int n, int qscale); |
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void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s, |
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int16_t *block/*align 16*/, int n, int qscale); |
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void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s, |
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int16_t *block/*align 16*/, int n, int qscale); |
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void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s, |
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int16_t *block/*align 16*/, int n, int qscale); |
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void (*dct_unquantize_h263_intra)(struct MpegEncContext *s, |
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int16_t *block/*align 16*/, int n, int qscale); |
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void (*dct_unquantize_h263_inter)(struct MpegEncContext *s, |
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int16_t *block/*align 16*/, int n, int qscale); |
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void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both) |
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int16_t *block/*align 16*/, int n, int qscale); |
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void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both) |
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int16_t *block/*align 16*/, int n, int qscale); |
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int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow); |
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int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow); |
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void (*denoise_dct)(struct MpegEncContext *s, int16_t *block); |
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int mpv_flags; ///< flags set by private options |
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int quantizer_noise_shaping; |
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/** |
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* ratecontrol qmin qmax limiting method |
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* 0-> clipping, 1-> use a nice continuous function to limit qscale within qmin/qmax. |
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*/ |
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float rc_qsquish; |
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float rc_qmod_amp; |
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int rc_qmod_freq; |
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float rc_initial_cplx; |
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float rc_buffer_aggressivity; |
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float border_masking; |
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int lmin, lmax; |
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int vbv_ignore_qmax; |
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char *rc_eq; |
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/* temp buffers for rate control */ |
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float *cplx_tab, *bits_tab; |
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/* flag to indicate a reinitialization is required, e.g. after |
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* a frame size change */ |
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int context_reinit; |
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ERContext er; |
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int error_rate; |
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/* temporary frames used by b_frame_strategy = 2 */ |
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AVFrame *tmp_frames[MAX_B_FRAMES + 2]; |
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int b_frame_strategy; |
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int b_sensitivity; |
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/* frame skip options for encoding */ |
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int frame_skip_threshold; |
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int frame_skip_factor; |
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int frame_skip_exp; |
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int frame_skip_cmp; |
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int scenechange_threshold; |
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int noise_reduction; |
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int intra_penalty; |
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} MpegEncContext; |
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/** |
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* Set the given MpegEncContext to common defaults (same for encoding |
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* and decoding). The changed fields will not depend upon the prior |
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* state of the MpegEncContext. |
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*/ |
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void ff_mpv_common_defaults(MpegEncContext *s); |
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int ff_mpv_common_init(MpegEncContext *s); |
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void ff_mpv_common_init_arm(MpegEncContext *s); |
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void ff_mpv_common_init_axp(MpegEncContext *s); |
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void ff_mpv_common_init_neon(MpegEncContext *s); |
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void ff_mpv_common_init_ppc(MpegEncContext *s); |
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void ff_mpv_common_init_x86(MpegEncContext *s); |
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void ff_mpv_common_init_mips(MpegEncContext *s); |
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/** |
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* Initialize an MpegEncContext's thread contexts. Presumes that |
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* slice_context_count is already set and that all the fields |
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* that are freed/reset in free_duplicate_context() are NULL. |
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*/ |
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int ff_mpv_init_duplicate_contexts(MpegEncContext *s); |
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/** |
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* Initialize and allocates MpegEncContext fields dependent on the resolution. |
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*/ |
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int ff_mpv_init_context_frame(MpegEncContext *s); |
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/** |
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* Frees and resets MpegEncContext fields depending on the resolution |
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* as well as the slice thread contexts. |
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* Is used during resolution changes to avoid a full reinitialization of the |
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* codec. |
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*/ |
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void ff_mpv_free_context_frame(MpegEncContext *s); |
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void ff_mpv_common_end(MpegEncContext *s); |
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void ff_clean_intra_table_entries(MpegEncContext *s); |
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int ff_update_duplicate_context(MpegEncContext *dst, const MpegEncContext *src); |
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void ff_set_qscale(MpegEncContext * s, int qscale); |
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void ff_mpv_idct_init(MpegEncContext *s); |
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void ff_init_scantable(const uint8_t *permutation, ScanTable *st, |
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const uint8_t *src_scantable); |
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void ff_init_block_index(MpegEncContext *s); |
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void ff_mpv_motion(MpegEncContext *s, |
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uint8_t *dest_y, uint8_t *dest_cb, |
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uint8_t *dest_cr, int dir, |
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uint8_t *const *ref_picture, |
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op_pixels_func (*pix_op)[4], |
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qpel_mc_func (*qpix_op)[16]); |
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static inline void ff_update_block_index(MpegEncContext *s, int bits_per_raw_sample, |
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int lowres, int chroma_x_shift) |
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{ |
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const int bytes_per_pixel = 1 + (bits_per_raw_sample > 8); |
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const int block_size = (8 * bytes_per_pixel) >> lowres; |
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s->block_index[0]+=2; |
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s->block_index[1]+=2; |
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s->block_index[2]+=2; |
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s->block_index[3]+=2; |
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s->block_index[4]++; |
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s->block_index[5]++; |
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s->dest[0]+= 2*block_size; |
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s->dest[1] += (2 >> chroma_x_shift) * block_size; |
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s->dest[2] += (2 >> chroma_x_shift) * block_size; |
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} |
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#endif /* AVCODEC_MPEGVIDEO_H */
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