X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fh263.h;h=678588a171b4967ad1ae983d577cbe7ab6199304;hb=495af353dbb0f0f4792baecc63a45ef563f80e44;hp=47b168b54a9b433849904393b4b1b1b88fef0e5b;hpb=5b21bdabe43611385d1d55a21d5b1f607b133d29;p=ffmpeg diff --git a/libavcodec/h263.h b/libavcodec/h263.h index 47b168b54a9..678588a171b 100644 --- a/libavcodec/h263.h +++ b/libavcodec/h263.h @@ -1,6 +1,5 @@ /* - * H263/MPEG4 backend for ffmpeg encoder and decoder - * copyright (c) 2007 Aurelien Jacobs + * H263 internal header * * This file is part of FFmpeg. * @@ -18,29 +17,235 @@ * 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 -#ifndef FFMPEG_H263_H -#define FFMPEG_H263_H - -#include "config.h" -#include "msmpeg4.h" - -#define ENABLE_ANY_H263_DECODER (ENABLE_H263_DECODER || \ - ENABLE_H263I_DECODER || \ - ENABLE_FLV_DECODER || \ - ENABLE_RV10_DECODER || \ - ENABLE_RV20_DECODER || \ - ENABLE_MPEG4_DECODER || \ - ENABLE_MSMPEG4_DECODER || \ - ENABLE_WMV_DECODER) -#define ENABLE_ANY_H263_ENCODER (ENABLE_H263_ENCODER || \ - ENABLE_H263P_ENCODER || \ - ENABLE_FLV_ENCODER || \ - ENABLE_RV10_ENCODER || \ - ENABLE_RV20_ENCODER || \ - ENABLE_MPEG4_ENCODER || \ - ENABLE_MSMPEG4_ENCODER || \ - ENABLE_WMV_ENCODER) -#define ENABLE_ANY_H263 (ENABLE_ANY_H263_DECODER || ENABLE_ANY_H263_ENCODER) - -#endif /* FFMPEG_H263_H */ +#include +#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); + + +/** + * Prints 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]); + +/** + * Returns the value of the 3bit "source format" syntax element. + * that 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; + 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