| /* |
| * H263 internal header |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| #ifndef AVCODEC_H263_H |
| #define AVCODEC_H263_H |
| |
| #include <stdint.h> |
| #include "libavutil/rational.h" |
| #include "get_bits.h" |
| #include "mpegvideo.h" |
| #include "rl.h" |
| |
| // The defines below define the number of bits that are read at once for |
| // reading vlc values. Changing these may improve speed and data cache needs |
| // be aware though that decreasing them may need the number of stages that is |
| // passed to get_vlc* to be increased. |
| #define INTRA_MCBPC_VLC_BITS 6 |
| #define INTER_MCBPC_VLC_BITS 7 |
| #define CBPY_VLC_BITS 6 |
| #define TEX_VLC_BITS 9 |
| |
| extern const AVRational ff_h263_pixel_aspect[16]; |
| extern const uint8_t ff_h263_cbpy_tab[16][2]; |
| |
| extern const uint8_t cbpc_b_tab[4][2]; |
| |
| extern const uint8_t mvtab[33][2]; |
| |
| extern const uint8_t ff_h263_intra_MCBPC_code[9]; |
| extern const uint8_t ff_h263_intra_MCBPC_bits[9]; |
| |
| extern const uint8_t ff_h263_inter_MCBPC_code[28]; |
| extern const uint8_t ff_h263_inter_MCBPC_bits[28]; |
| extern const uint8_t h263_mbtype_b_tab[15][2]; |
| |
| extern VLC ff_h263_intra_MCBPC_vlc; |
| extern VLC ff_h263_inter_MCBPC_vlc; |
| extern VLC ff_h263_cbpy_vlc; |
| |
| extern RLTable ff_h263_rl_inter; |
| |
| extern RLTable rl_intra_aic; |
| |
| extern const uint16_t h263_format[8][2]; |
| extern const uint8_t modified_quant_tab[2][32]; |
| extern uint16_t ff_mba_max[6]; |
| extern uint8_t ff_mba_length[7]; |
| |
| extern uint8_t ff_h263_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3]; |
| |
| |
| int h263_decode_motion(MpegEncContext * s, int pred, int f_code); |
| av_const int ff_h263_aspect_to_info(AVRational aspect); |
| int ff_h263_decode_init(AVCodecContext *avctx); |
| int ff_h263_decode_frame(AVCodecContext *avctx, |
| void *data, int *data_size, |
| AVPacket *avpkt); |
| int ff_h263_decode_end(AVCodecContext *avctx); |
| void h263_encode_mb(MpegEncContext *s, |
| DCTELEM block[6][64], |
| int motion_x, int motion_y); |
| void h263_encode_picture_header(MpegEncContext *s, int picture_number); |
| void h263_encode_gob_header(MpegEncContext * s, int mb_line); |
| int16_t *h263_pred_motion(MpegEncContext * s, int block, int dir, |
| int *px, int *py); |
| void h263_encode_init(MpegEncContext *s); |
| void h263_decode_init_vlc(MpegEncContext *s); |
| int h263_decode_picture_header(MpegEncContext *s); |
| int ff_h263_decode_gob_header(MpegEncContext *s); |
| void ff_h263_update_motion_val(MpegEncContext * s); |
| void ff_h263_loop_filter(MpegEncContext * s); |
| int ff_h263_decode_mba(MpegEncContext *s); |
| void ff_h263_encode_mba(MpegEncContext *s); |
| void ff_init_qscale_tab(MpegEncContext *s); |
| int h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr); |
| void h263_pred_acdc(MpegEncContext * s, DCTELEM *block, int n); |
| |
| |
| /** |
| * Print picture info if FF_DEBUG_PICT_INFO is set. |
| */ |
| void ff_h263_show_pict_info(MpegEncContext *s); |
| |
| int ff_intel_h263_decode_picture_header(MpegEncContext *s); |
| int ff_h263_decode_mb(MpegEncContext *s, |
| DCTELEM block[6][64]); |
| |
| /** |
| * Return the value of the 3bit "source format" syntax element. |
| * This represents some standard picture dimensions or indicates that |
| * width&height are explicitly stored later. |
| */ |
| int av_const h263_get_picture_format(int width, int height); |
| |
| void ff_clean_h263_qscales(MpegEncContext *s); |
| int ff_h263_resync(MpegEncContext *s); |
| const uint8_t *ff_h263_find_resync_marker(const uint8_t *p, const uint8_t *end); |
| int ff_h263_get_gob_height(MpegEncContext *s); |
| void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code); |
| |
| |
| static inline int h263_get_motion_length(MpegEncContext * s, int val, int f_code){ |
| int l, bit_size, code; |
| |
| if (val == 0) { |
| return mvtab[0][1]; |
| } else { |
| bit_size = f_code - 1; |
| /* modulo encoding */ |
| l= INT_BIT - 6 - bit_size; |
| val = (val<<l)>>l; |
| val--; |
| code = (val >> bit_size) + 1; |
| |
| return mvtab[code][1] + 1 + bit_size; |
| } |
| } |
| |
| static inline void ff_h263_encode_motion_vector(MpegEncContext * s, int x, int y, int f_code){ |
| if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){ |
| skip_put_bits(&s->pb, |
| h263_get_motion_length(s, x, f_code) |
| +h263_get_motion_length(s, y, f_code)); |
| }else{ |
| ff_h263_encode_motion(s, x, f_code); |
| ff_h263_encode_motion(s, y, f_code); |
| } |
| } |
| |
| static inline int get_p_cbp(MpegEncContext * s, |
| DCTELEM block[6][64], |
| int motion_x, int motion_y){ |
| int cbp, i; |
| |
| if(s->flags & CODEC_FLAG_CBP_RD){ |
| int best_cbpy_score= INT_MAX; |
| int best_cbpc_score= INT_MAX; |
| int cbpc = (-1), cbpy= (-1); |
| const int offset= (s->mv_type==MV_TYPE_16X16 ? 0 : 16) + (s->dquant ? 8 : 0); |
| const int lambda= s->lambda2 >> (FF_LAMBDA_SHIFT - 6); |
| |
| for(i=0; i<4; i++){ |
| int score= ff_h263_inter_MCBPC_bits[i + offset] * lambda; |
| if(i&1) score += s->coded_score[5]; |
| if(i&2) score += s->coded_score[4]; |
| |
| if(score < best_cbpc_score){ |
| best_cbpc_score= score; |
| cbpc= i; |
| } |
| } |
| |
| for(i=0; i<16; i++){ |
| int score= ff_h263_cbpy_tab[i ^ 0xF][1] * lambda; |
| if(i&1) score += s->coded_score[3]; |
| if(i&2) score += s->coded_score[2]; |
| if(i&4) score += s->coded_score[1]; |
| if(i&8) score += s->coded_score[0]; |
| |
| if(score < best_cbpy_score){ |
| best_cbpy_score= score; |
| cbpy= i; |
| } |
| } |
| cbp= cbpc + 4*cbpy; |
| if ((motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16){ |
| if(best_cbpy_score + best_cbpc_score + 2*lambda >= 0) |
| cbp= 0; |
| } |
| |
| for (i = 0; i < 6; i++) { |
| if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i))&1)==0 ){ |
| s->block_last_index[i]= -1; |
| s->dsp.clear_block(s->block[i]); |
| } |
| } |
| }else{ |
| cbp= 0; |
| for (i = 0; i < 6; i++) { |
| if (s->block_last_index[i] >= 0) |
| cbp |= 1 << (5 - i); |
| } |
| } |
| return cbp; |
| } |
| |
| static inline int get_b_cbp(MpegEncContext * s, DCTELEM block[6][64], |
| int motion_x, int motion_y, int mb_type){ |
| int cbp=0, i; |
| |
| if(s->flags & CODEC_FLAG_CBP_RD){ |
| int score=0; |
| const int lambda= s->lambda2 >> (FF_LAMBDA_SHIFT - 6); |
| |
| for(i=0; i<6; i++){ |
| if(s->coded_score[i] < 0){ |
| score += s->coded_score[i]; |
| cbp |= 1 << (5 - i); |
| } |
| } |
| |
| if(cbp){ |
| int zero_score= -6; |
| if ((motion_x | motion_y | s->dquant | mb_type) == 0){ |
| zero_score-= 4; //2*MV + mb_type + cbp bit |
| } |
| |
| zero_score*= lambda; |
| if(zero_score <= score){ |
| cbp=0; |
| } |
| } |
| |
| for (i = 0; i < 6; i++) { |
| if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i))&1)==0 ){ |
| s->block_last_index[i]= -1; |
| s->dsp.clear_block(s->block[i]); |
| } |
| } |
| }else{ |
| for (i = 0; i < 6; i++) { |
| if (s->block_last_index[i] >= 0) |
| cbp |= 1 << (5 - i); |
| } |
| } |
| return cbp; |
| } |
| |
| static inline void memsetw(short *tab, int val, int n) |
| { |
| int i; |
| for(i=0;i<n;i++) |
| tab[i] = val; |
| } |
| |
| #endif /* AVCODEC_H263_H */ |