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210 lines
6.9 KiB
210 lines
6.9 KiB
/* |
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* H263 internal header |
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* |
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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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#ifndef AVCODEC_H263_H |
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#define AVCODEC_H263_H |
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#include <stdint.h> |
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#include "libavutil/rational.h" |
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#include "get_bits.h" |
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#include "mpegvideo.h" |
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#include "rl.h" |
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// The defines below define the number of bits that are read at once for |
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// reading vlc values. Changing these may improve speed and data cache needs |
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// be aware though that decreasing them may need the number of stages that is |
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// passed to get_vlc* to be increased. |
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#define INTRA_MCBPC_VLC_BITS 6 |
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#define INTER_MCBPC_VLC_BITS 7 |
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#define CBPY_VLC_BITS 6 |
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#define TEX_VLC_BITS 9 |
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extern const AVRational ff_h263_pixel_aspect[16]; |
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extern const uint8_t ff_h263_cbpy_tab[16][2]; |
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extern const uint8_t ff_cbpc_b_tab[4][2]; |
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extern const uint8_t ff_mvtab[33][2]; |
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extern const uint8_t ff_h263_intra_MCBPC_code[9]; |
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extern const uint8_t ff_h263_intra_MCBPC_bits[9]; |
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extern const uint8_t ff_h263_inter_MCBPC_code[28]; |
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extern const uint8_t ff_h263_inter_MCBPC_bits[28]; |
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extern const uint8_t ff_h263_mbtype_b_tab[15][2]; |
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extern VLC ff_h263_intra_MCBPC_vlc; |
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extern VLC ff_h263_inter_MCBPC_vlc; |
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extern VLC ff_h263_cbpy_vlc; |
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extern RLTable ff_h263_rl_inter; |
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extern RLTable ff_rl_intra_aic; |
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extern const uint16_t ff_h263_format[8][2]; |
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extern const uint8_t ff_modified_quant_tab[2][32]; |
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extern uint16_t ff_mba_max[6]; |
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extern uint8_t ff_mba_length[7]; |
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extern uint8_t ff_h263_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3]; |
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int ff_h263_decode_motion(MpegEncContext * s, int pred, int f_code); |
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av_const int ff_h263_aspect_to_info(AVRational aspect); |
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int ff_h263_decode_init(AVCodecContext *avctx); |
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int ff_h263_decode_frame(AVCodecContext *avctx, |
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void *data, int *data_size, |
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AVPacket *avpkt); |
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int ff_h263_decode_end(AVCodecContext *avctx); |
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void ff_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 ff_h263_encode_picture_header(MpegEncContext *s, int picture_number); |
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void ff_h263_encode_gob_header(MpegEncContext * s, int mb_line); |
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int16_t *ff_h263_pred_motion(MpegEncContext * s, int block, int dir, |
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int *px, int *py); |
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void ff_h263_encode_init(MpegEncContext *s); |
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void ff_h263_decode_init_vlc(MpegEncContext *s); |
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int ff_h263_decode_picture_header(MpegEncContext *s); |
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int ff_h263_decode_gob_header(MpegEncContext *s); |
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void ff_h263_update_motion_val(MpegEncContext * s); |
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void ff_h263_loop_filter(MpegEncContext * s); |
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int ff_h263_decode_mba(MpegEncContext *s); |
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void ff_h263_encode_mba(MpegEncContext *s); |
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void ff_init_qscale_tab(MpegEncContext *s); |
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int ff_h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr); |
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void ff_h263_pred_acdc(MpegEncContext * s, DCTELEM *block, int n); |
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/** |
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* Print picture info if FF_DEBUG_PICT_INFO is set. |
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*/ |
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void ff_h263_show_pict_info(MpegEncContext *s); |
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int ff_intel_h263_decode_picture_header(MpegEncContext *s); |
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int ff_h263_decode_mb(MpegEncContext *s, |
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DCTELEM block[6][64]); |
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/** |
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* Return the value of the 3bit "source format" syntax element. |
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* This represents some standard picture dimensions or indicates that |
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* width&height are explicitly stored later. |
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*/ |
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int av_const h263_get_picture_format(int width, int height); |
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void ff_clean_h263_qscales(MpegEncContext *s); |
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int ff_h263_resync(MpegEncContext *s); |
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const uint8_t *ff_h263_find_resync_marker(const uint8_t *p, const uint8_t *end); |
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int ff_h263_get_gob_height(MpegEncContext *s); |
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void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code); |
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static inline int h263_get_motion_length(MpegEncContext * s, int val, int f_code){ |
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int l, bit_size, code; |
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if (val == 0) { |
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return ff_mvtab[0][1]; |
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} else { |
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bit_size = f_code - 1; |
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/* modulo encoding */ |
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l= INT_BIT - 6 - bit_size; |
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val = (val<<l)>>l; |
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val--; |
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code = (val >> bit_size) + 1; |
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return ff_mvtab[code][1] + 1 + bit_size; |
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} |
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} |
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static inline void ff_h263_encode_motion_vector(MpegEncContext * s, int x, int y, int f_code){ |
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if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){ |
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skip_put_bits(&s->pb, |
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h263_get_motion_length(s, x, f_code) |
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+h263_get_motion_length(s, y, f_code)); |
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}else{ |
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ff_h263_encode_motion(s, x, f_code); |
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ff_h263_encode_motion(s, y, f_code); |
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} |
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} |
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static inline int get_p_cbp(MpegEncContext * s, |
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DCTELEM block[6][64], |
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int motion_x, int motion_y){ |
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int cbp, i; |
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if(s->flags & CODEC_FLAG_CBP_RD){ |
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int best_cbpy_score= INT_MAX; |
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int best_cbpc_score= INT_MAX; |
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int cbpc = (-1), cbpy= (-1); |
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const int offset= (s->mv_type==MV_TYPE_16X16 ? 0 : 16) + (s->dquant ? 8 : 0); |
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const int lambda= s->lambda2 >> (FF_LAMBDA_SHIFT - 6); |
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for(i=0; i<4; i++){ |
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int score= ff_h263_inter_MCBPC_bits[i + offset] * lambda; |
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if(i&1) score += s->coded_score[5]; |
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if(i&2) score += s->coded_score[4]; |
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if(score < best_cbpc_score){ |
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best_cbpc_score= score; |
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cbpc= i; |
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} |
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} |
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for(i=0; i<16; i++){ |
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int score= ff_h263_cbpy_tab[i ^ 0xF][1] * lambda; |
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if(i&1) score += s->coded_score[3]; |
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if(i&2) score += s->coded_score[2]; |
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if(i&4) score += s->coded_score[1]; |
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if(i&8) score += s->coded_score[0]; |
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if(score < best_cbpy_score){ |
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best_cbpy_score= score; |
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cbpy= i; |
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} |
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} |
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cbp= cbpc + 4*cbpy; |
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if ((motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16){ |
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if(best_cbpy_score + best_cbpc_score + 2*lambda >= 0) |
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cbp= 0; |
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} |
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for (i = 0; i < 6; i++) { |
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if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i))&1)==0 ){ |
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s->block_last_index[i]= -1; |
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s->dsp.clear_block(s->block[i]); |
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} |
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} |
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}else{ |
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cbp= 0; |
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for (i = 0; i < 6; i++) { |
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if (s->block_last_index[i] >= 0) |
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cbp |= 1 << (5 - i); |
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} |
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} |
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return cbp; |
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} |
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static inline void memsetw(short *tab, int val, int n) |
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{ |
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int i; |
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for(i=0;i<n;i++) |
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tab[i] = val; |
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} |
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#endif /* AVCODEC_H263_H */
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