yading@10: /* yading@10: * MSMPEG4 backend for encoder and decoder yading@10: * Copyright (c) 2001 Fabrice Bellard yading@10: * Copyright (c) 2002-2013 Michael Niedermayer yading@10: * yading@10: * msmpeg4v1 & v2 stuff by Michael Niedermayer yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: #include "avcodec.h" yading@10: #include "dsputil.h" yading@10: #include "mpegvideo.h" yading@10: #include "msmpeg4.h" yading@10: #include "libavutil/imgutils.h" yading@10: #include "libavutil/x86/asm.h" yading@10: #include "h263.h" yading@10: #include "mpeg4video.h" yading@10: #include "msmpeg4data.h" yading@10: #include "vc1data.h" yading@10: yading@10: #define DC_VLC_BITS 9 yading@10: #define V2_INTRA_CBPC_VLC_BITS 3 yading@10: #define V2_MB_TYPE_VLC_BITS 7 yading@10: #define MV_VLC_BITS 9 yading@10: #define V2_MV_VLC_BITS 9 yading@10: #define TEX_VLC_BITS 9 yading@10: yading@10: #define DEFAULT_INTER_INDEX 3 yading@10: yading@10: static inline int msmpeg4v1_pred_dc(MpegEncContext * s, int n, yading@10: int32_t **dc_val_ptr) yading@10: { yading@10: int i; yading@10: yading@10: if (n < 4) { yading@10: i= 0; yading@10: } else { yading@10: i= n-3; yading@10: } yading@10: yading@10: *dc_val_ptr= &s->last_dc[i]; yading@10: return s->last_dc[i]; yading@10: } yading@10: yading@10: /****************************************/ yading@10: /* decoding stuff */ yading@10: yading@10: VLC ff_mb_non_intra_vlc[4]; yading@10: static VLC v2_dc_lum_vlc; yading@10: static VLC v2_dc_chroma_vlc; yading@10: static VLC v2_intra_cbpc_vlc; yading@10: static VLC v2_mb_type_vlc; yading@10: static VLC v2_mv_vlc; yading@10: VLC ff_inter_intra_vlc; yading@10: yading@10: /* This is identical to h263 except that its range is multiplied by 2. */ yading@10: static int msmpeg4v2_decode_motion(MpegEncContext * s, int pred, int f_code) yading@10: { yading@10: int code, val, sign, shift; yading@10: yading@10: code = get_vlc2(&s->gb, v2_mv_vlc.table, V2_MV_VLC_BITS, 2); yading@10: av_dlog(s, "MV code %d at %d %d pred: %d\n", code, s->mb_x,s->mb_y, pred); yading@10: if (code < 0) yading@10: return 0xffff; yading@10: yading@10: if (code == 0) yading@10: return pred; yading@10: sign = get_bits1(&s->gb); yading@10: shift = f_code - 1; yading@10: val = code; yading@10: if (shift) { yading@10: val = (val - 1) << shift; yading@10: val |= get_bits(&s->gb, shift); yading@10: val++; yading@10: } yading@10: if (sign) yading@10: val = -val; yading@10: yading@10: val += pred; yading@10: if (val <= -64) yading@10: val += 64; yading@10: else if (val >= 64) yading@10: val -= 64; yading@10: yading@10: return val; yading@10: } yading@10: yading@10: static int msmpeg4v12_decode_mb(MpegEncContext *s, int16_t block[6][64]) yading@10: { yading@10: int cbp, code, i; yading@10: uint32_t * const mb_type_ptr = &s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride]; yading@10: yading@10: if (s->pict_type == AV_PICTURE_TYPE_P) { yading@10: if (s->use_skip_mb_code) { yading@10: if (get_bits1(&s->gb)) { yading@10: /* skip mb */ yading@10: s->mb_intra = 0; yading@10: for(i=0;i<6;i++) yading@10: s->block_last_index[i] = -1; yading@10: s->mv_dir = MV_DIR_FORWARD; yading@10: s->mv_type = MV_TYPE_16X16; yading@10: s->mv[0][0][0] = 0; yading@10: s->mv[0][0][1] = 0; yading@10: s->mb_skipped = 1; yading@10: *mb_type_ptr = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16; yading@10: return 0; yading@10: } yading@10: } yading@10: yading@10: if(s->msmpeg4_version==2) yading@10: code = get_vlc2(&s->gb, v2_mb_type_vlc.table, V2_MB_TYPE_VLC_BITS, 1); yading@10: else yading@10: code = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); yading@10: if(code<0 || code>7){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", code, s->mb_x, s->mb_y); yading@10: return -1; yading@10: } yading@10: yading@10: s->mb_intra = code >>2; yading@10: yading@10: cbp = code & 0x3; yading@10: } else { yading@10: s->mb_intra = 1; yading@10: if(s->msmpeg4_version==2) yading@10: cbp= get_vlc2(&s->gb, v2_intra_cbpc_vlc.table, V2_INTRA_CBPC_VLC_BITS, 1); yading@10: else yading@10: cbp= get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 1); yading@10: if(cbp<0 || cbp>3){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y); yading@10: return -1; yading@10: } yading@10: } yading@10: yading@10: if (!s->mb_intra) { yading@10: int mx, my, cbpy; yading@10: yading@10: cbpy= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); yading@10: if(cbpy<0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "cbpy %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y); yading@10: return -1; yading@10: } yading@10: yading@10: cbp|= cbpy<<2; yading@10: if(s->msmpeg4_version==1 || (cbp&3) != 3) cbp^= 0x3C; yading@10: yading@10: ff_h263_pred_motion(s, 0, 0, &mx, &my); yading@10: mx= msmpeg4v2_decode_motion(s, mx, 1); yading@10: my= msmpeg4v2_decode_motion(s, my, 1); yading@10: yading@10: s->mv_dir = MV_DIR_FORWARD; yading@10: s->mv_type = MV_TYPE_16X16; yading@10: s->mv[0][0][0] = mx; yading@10: s->mv[0][0][1] = my; yading@10: *mb_type_ptr = MB_TYPE_L0 | MB_TYPE_16x16; yading@10: } else { yading@10: if(s->msmpeg4_version==2){ yading@10: s->ac_pred = get_bits1(&s->gb); yading@10: cbp|= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1)<<2; //FIXME check errors yading@10: } else{ yading@10: s->ac_pred = 0; yading@10: cbp|= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1)<<2; //FIXME check errors yading@10: if(s->pict_type==AV_PICTURE_TYPE_P) cbp^=0x3C; yading@10: } yading@10: *mb_type_ptr = MB_TYPE_INTRA; yading@10: } yading@10: yading@10: s->dsp.clear_blocks(s->block[0]); yading@10: for (i = 0; i < 6; i++) { yading@10: if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0) yading@10: { yading@10: av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding block: %d x %d (%d)\n", s->mb_x, s->mb_y, i); yading@10: return -1; yading@10: } yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: static int msmpeg4v34_decode_mb(MpegEncContext *s, int16_t block[6][64]) yading@10: { yading@10: int cbp, code, i; yading@10: uint8_t *coded_val; yading@10: uint32_t * const mb_type_ptr = &s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride]; yading@10: yading@10: if (s->pict_type == AV_PICTURE_TYPE_P) { yading@10: if (s->use_skip_mb_code) { yading@10: if (get_bits1(&s->gb)) { yading@10: /* skip mb */ yading@10: s->mb_intra = 0; yading@10: for(i=0;i<6;i++) yading@10: s->block_last_index[i] = -1; yading@10: s->mv_dir = MV_DIR_FORWARD; yading@10: s->mv_type = MV_TYPE_16X16; yading@10: s->mv[0][0][0] = 0; yading@10: s->mv[0][0][1] = 0; yading@10: s->mb_skipped = 1; yading@10: *mb_type_ptr = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16; yading@10: yading@10: return 0; yading@10: } yading@10: } yading@10: yading@10: code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[DEFAULT_INTER_INDEX].table, MB_NON_INTRA_VLC_BITS, 3); yading@10: if (code < 0) yading@10: return -1; yading@10: //s->mb_intra = (code & 0x40) ? 0 : 1; yading@10: s->mb_intra = (~code & 0x40) >> 6; yading@10: yading@10: cbp = code & 0x3f; yading@10: } else { yading@10: s->mb_intra = 1; yading@10: code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2); yading@10: if (code < 0) yading@10: return -1; yading@10: /* predict coded block pattern */ yading@10: cbp = 0; yading@10: for(i=0;i<6;i++) { yading@10: int val = ((code >> (5 - i)) & 1); yading@10: if (i < 4) { yading@10: int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val); yading@10: val = val ^ pred; yading@10: *coded_val = val; yading@10: } yading@10: cbp |= val << (5 - i); yading@10: } yading@10: } yading@10: yading@10: if (!s->mb_intra) { yading@10: int mx, my; yading@10: if(s->per_mb_rl_table && cbp){ yading@10: s->rl_table_index = decode012(&s->gb); yading@10: s->rl_chroma_table_index = s->rl_table_index; yading@10: } yading@10: ff_h263_pred_motion(s, 0, 0, &mx, &my); yading@10: if (ff_msmpeg4_decode_motion(s, &mx, &my) < 0) yading@10: return -1; yading@10: s->mv_dir = MV_DIR_FORWARD; yading@10: s->mv_type = MV_TYPE_16X16; yading@10: s->mv[0][0][0] = mx; yading@10: s->mv[0][0][1] = my; yading@10: *mb_type_ptr = MB_TYPE_L0 | MB_TYPE_16x16; yading@10: } else { yading@10: av_dlog(s, "I at %d %d %d %06X\n", s->mb_x, s->mb_y, yading@10: ((cbp & 3) ? 1 : 0) +((cbp & 0x3C)? 2 : 0), yading@10: show_bits(&s->gb, 24)); yading@10: s->ac_pred = get_bits1(&s->gb); yading@10: *mb_type_ptr = MB_TYPE_INTRA; yading@10: if(s->inter_intra_pred){ yading@10: s->h263_aic_dir= get_vlc2(&s->gb, ff_inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1); yading@10: av_dlog(s, "%d%d %d %d/", yading@10: s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y); yading@10: } yading@10: if(s->per_mb_rl_table && cbp){ yading@10: s->rl_table_index = decode012(&s->gb); yading@10: s->rl_chroma_table_index = s->rl_table_index; yading@10: } yading@10: } yading@10: yading@10: s->dsp.clear_blocks(s->block[0]); yading@10: for (i = 0; i < 6; i++) { yading@10: if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0) yading@10: { yading@10: av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding block: %d x %d (%d)\n", s->mb_x, s->mb_y, i); yading@10: return -1; yading@10: } yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: /* init all vlc decoding tables */ yading@10: av_cold int ff_msmpeg4_decode_init(AVCodecContext *avctx) yading@10: { yading@10: MpegEncContext *s = avctx->priv_data; yading@10: static volatile int done = 0; yading@10: int i, ret; yading@10: MVTable *mv; yading@10: yading@10: if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0) yading@10: return ret; yading@10: yading@10: if (ff_h263_decode_init(avctx) < 0) yading@10: return -1; yading@10: yading@10: ff_msmpeg4_common_init(s); yading@10: yading@10: if (!done) { yading@10: for(i=0;ivlc, MV_VLC_BITS, mv->n + 1, yading@10: mv->table_mv_bits, 1, 1, yading@10: mv->table_mv_code, 2, 2, 3714); yading@10: mv = &ff_mv_tables[1]; yading@10: INIT_VLC_STATIC(&mv->vlc, MV_VLC_BITS, mv->n + 1, yading@10: mv->table_mv_bits, 1, 1, yading@10: mv->table_mv_code, 2, 2, 2694); yading@10: yading@10: INIT_VLC_STATIC(&ff_msmp4_dc_luma_vlc[0], DC_VLC_BITS, 120, yading@10: &ff_table0_dc_lum[0][1], 8, 4, yading@10: &ff_table0_dc_lum[0][0], 8, 4, 1158); yading@10: INIT_VLC_STATIC(&ff_msmp4_dc_chroma_vlc[0], DC_VLC_BITS, 120, yading@10: &ff_table0_dc_chroma[0][1], 8, 4, yading@10: &ff_table0_dc_chroma[0][0], 8, 4, 1118); yading@10: INIT_VLC_STATIC(&ff_msmp4_dc_luma_vlc[1], DC_VLC_BITS, 120, yading@10: &ff_table1_dc_lum[0][1], 8, 4, yading@10: &ff_table1_dc_lum[0][0], 8, 4, 1476); yading@10: INIT_VLC_STATIC(&ff_msmp4_dc_chroma_vlc[1], DC_VLC_BITS, 120, yading@10: &ff_table1_dc_chroma[0][1], 8, 4, yading@10: &ff_table1_dc_chroma[0][0], 8, 4, 1216); yading@10: yading@10: INIT_VLC_STATIC(&v2_dc_lum_vlc, DC_VLC_BITS, 512, yading@10: &ff_v2_dc_lum_table[0][1], 8, 4, yading@10: &ff_v2_dc_lum_table[0][0], 8, 4, 1472); yading@10: INIT_VLC_STATIC(&v2_dc_chroma_vlc, DC_VLC_BITS, 512, yading@10: &ff_v2_dc_chroma_table[0][1], 8, 4, yading@10: &ff_v2_dc_chroma_table[0][0], 8, 4, 1506); yading@10: yading@10: INIT_VLC_STATIC(&v2_intra_cbpc_vlc, V2_INTRA_CBPC_VLC_BITS, 4, yading@10: &ff_v2_intra_cbpc[0][1], 2, 1, yading@10: &ff_v2_intra_cbpc[0][0], 2, 1, 8); yading@10: INIT_VLC_STATIC(&v2_mb_type_vlc, V2_MB_TYPE_VLC_BITS, 8, yading@10: &ff_v2_mb_type[0][1], 2, 1, yading@10: &ff_v2_mb_type[0][0], 2, 1, 128); yading@10: INIT_VLC_STATIC(&v2_mv_vlc, V2_MV_VLC_BITS, 33, yading@10: &ff_mvtab[0][1], 2, 1, yading@10: &ff_mvtab[0][0], 2, 1, 538); yading@10: yading@10: INIT_VLC_STATIC(&ff_mb_non_intra_vlc[0], MB_NON_INTRA_VLC_BITS, 128, yading@10: &ff_wmv2_inter_table[0][0][1], 8, 4, yading@10: &ff_wmv2_inter_table[0][0][0], 8, 4, 1636); yading@10: INIT_VLC_STATIC(&ff_mb_non_intra_vlc[1], MB_NON_INTRA_VLC_BITS, 128, yading@10: &ff_wmv2_inter_table[1][0][1], 8, 4, yading@10: &ff_wmv2_inter_table[1][0][0], 8, 4, 2648); yading@10: INIT_VLC_STATIC(&ff_mb_non_intra_vlc[2], MB_NON_INTRA_VLC_BITS, 128, yading@10: &ff_wmv2_inter_table[2][0][1], 8, 4, yading@10: &ff_wmv2_inter_table[2][0][0], 8, 4, 1532); yading@10: INIT_VLC_STATIC(&ff_mb_non_intra_vlc[3], MB_NON_INTRA_VLC_BITS, 128, yading@10: &ff_wmv2_inter_table[3][0][1], 8, 4, yading@10: &ff_wmv2_inter_table[3][0][0], 8, 4, 2488); yading@10: yading@10: INIT_VLC_STATIC(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64, yading@10: &ff_msmp4_mb_i_table[0][1], 4, 2, yading@10: &ff_msmp4_mb_i_table[0][0], 4, 2, 536); yading@10: yading@10: INIT_VLC_STATIC(&ff_inter_intra_vlc, INTER_INTRA_VLC_BITS, 4, yading@10: &ff_table_inter_intra[0][1], 2, 1, yading@10: &ff_table_inter_intra[0][0], 2, 1, 8); yading@10: done = 1; yading@10: } yading@10: yading@10: switch(s->msmpeg4_version){ yading@10: case 1: yading@10: case 2: yading@10: s->decode_mb= msmpeg4v12_decode_mb; yading@10: break; yading@10: case 3: yading@10: case 4: yading@10: s->decode_mb= msmpeg4v34_decode_mb; yading@10: break; yading@10: case 5: yading@10: if (CONFIG_WMV2_DECODER) yading@10: s->decode_mb= ff_wmv2_decode_mb; yading@10: case 6: yading@10: //FIXME + TODO VC1 decode mb yading@10: break; yading@10: } yading@10: yading@10: s->slice_height= s->mb_height; //to avoid 1/0 if the first frame is not a keyframe yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: int ff_msmpeg4_decode_picture_header(MpegEncContext * s) yading@10: { yading@10: int code; yading@10: yading@10: if(s->msmpeg4_version==1){ yading@10: int start_code = get_bits_long(&s->gb, 32); yading@10: if(start_code!=0x00000100){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "invalid startcode\n"); yading@10: return -1; yading@10: } yading@10: yading@10: skip_bits(&s->gb, 5); // frame number */ yading@10: } yading@10: yading@10: s->pict_type = get_bits(&s->gb, 2) + 1; yading@10: if (s->pict_type != AV_PICTURE_TYPE_I && yading@10: s->pict_type != AV_PICTURE_TYPE_P){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "invalid picture type\n"); yading@10: return -1; yading@10: } yading@10: #if 0 yading@10: { yading@10: static int had_i=0; yading@10: if(s->pict_type == AV_PICTURE_TYPE_I) had_i=1; yading@10: if(!had_i) return -1; yading@10: } yading@10: #endif yading@10: s->chroma_qscale= s->qscale = get_bits(&s->gb, 5); yading@10: if(s->qscale==0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "invalid qscale\n"); yading@10: return -1; yading@10: } yading@10: yading@10: if (s->pict_type == AV_PICTURE_TYPE_I) { yading@10: code = get_bits(&s->gb, 5); yading@10: if(s->msmpeg4_version==1){ yading@10: if(code==0 || code>s->mb_height){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "invalid slice height %d\n", code); yading@10: return -1; yading@10: } yading@10: yading@10: s->slice_height = code; yading@10: }else{ yading@10: /* 0x17: one slice, 0x18: two slices, ... */ yading@10: if (code < 0x17){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "error, slice code was %X\n", code); yading@10: return -1; yading@10: } yading@10: yading@10: s->slice_height = s->mb_height / (code - 0x16); yading@10: } yading@10: yading@10: switch(s->msmpeg4_version){ yading@10: case 1: yading@10: case 2: yading@10: s->rl_chroma_table_index = 2; yading@10: s->rl_table_index = 2; yading@10: yading@10: s->dc_table_index = 0; //not used yading@10: break; yading@10: case 3: yading@10: s->rl_chroma_table_index = decode012(&s->gb); yading@10: s->rl_table_index = decode012(&s->gb); yading@10: yading@10: s->dc_table_index = get_bits1(&s->gb); yading@10: break; yading@10: case 4: yading@10: ff_msmpeg4_decode_ext_header(s, (2+5+5+17+7)/8); yading@10: yading@10: if(s->bit_rate > MBAC_BITRATE) s->per_mb_rl_table= get_bits1(&s->gb); yading@10: else s->per_mb_rl_table= 0; yading@10: yading@10: if(!s->per_mb_rl_table){ yading@10: s->rl_chroma_table_index = decode012(&s->gb); yading@10: s->rl_table_index = decode012(&s->gb); yading@10: } yading@10: yading@10: s->dc_table_index = get_bits1(&s->gb); yading@10: s->inter_intra_pred= 0; yading@10: break; yading@10: } yading@10: s->no_rounding = 1; yading@10: if(s->avctx->debug&FF_DEBUG_PICT_INFO) yading@10: av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d slice:%d \n", yading@10: s->qscale, yading@10: s->rl_chroma_table_index, yading@10: s->rl_table_index, yading@10: s->dc_table_index, yading@10: s->per_mb_rl_table, yading@10: s->slice_height); yading@10: } else { yading@10: switch(s->msmpeg4_version){ yading@10: case 1: yading@10: case 2: yading@10: if(s->msmpeg4_version==1) yading@10: s->use_skip_mb_code = 1; yading@10: else yading@10: s->use_skip_mb_code = get_bits1(&s->gb); yading@10: s->rl_table_index = 2; yading@10: s->rl_chroma_table_index = s->rl_table_index; yading@10: s->dc_table_index = 0; //not used yading@10: s->mv_table_index = 0; yading@10: break; yading@10: case 3: yading@10: s->use_skip_mb_code = get_bits1(&s->gb); yading@10: s->rl_table_index = decode012(&s->gb); yading@10: s->rl_chroma_table_index = s->rl_table_index; yading@10: yading@10: s->dc_table_index = get_bits1(&s->gb); yading@10: yading@10: s->mv_table_index = get_bits1(&s->gb); yading@10: break; yading@10: case 4: yading@10: s->use_skip_mb_code = get_bits1(&s->gb); yading@10: yading@10: if(s->bit_rate > MBAC_BITRATE) s->per_mb_rl_table= get_bits1(&s->gb); yading@10: else s->per_mb_rl_table= 0; yading@10: yading@10: if(!s->per_mb_rl_table){ yading@10: s->rl_table_index = decode012(&s->gb); yading@10: s->rl_chroma_table_index = s->rl_table_index; yading@10: } yading@10: yading@10: s->dc_table_index = get_bits1(&s->gb); yading@10: yading@10: s->mv_table_index = get_bits1(&s->gb); yading@10: s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE); yading@10: break; yading@10: } yading@10: yading@10: if(s->avctx->debug&FF_DEBUG_PICT_INFO) yading@10: av_log(s->avctx, AV_LOG_DEBUG, "skip:%d rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d \n", yading@10: s->use_skip_mb_code, yading@10: s->rl_table_index, yading@10: s->rl_chroma_table_index, yading@10: s->dc_table_index, yading@10: s->mv_table_index, yading@10: s->per_mb_rl_table, yading@10: s->qscale); yading@10: yading@10: if(s->flipflop_rounding){ yading@10: s->no_rounding ^= 1; yading@10: }else{ yading@10: s->no_rounding = 0; yading@10: } yading@10: } yading@10: av_dlog(s->avctx, "%d %d %d %d %d\n", s->pict_type, s->bit_rate, yading@10: s->inter_intra_pred, s->width, s->height); yading@10: yading@10: s->esc3_level_length= 0; yading@10: s->esc3_run_length= 0; yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size) yading@10: { yading@10: int left= buf_size*8 - get_bits_count(&s->gb); yading@10: int length= s->msmpeg4_version>=3 ? 17 : 16; yading@10: /* the alt_bitstream reader could read over the end so we need to check it */ yading@10: if(left>=length && leftgb, 5); /* fps */ yading@10: s->bit_rate= get_bits(&s->gb, 11)*1024; yading@10: if(s->msmpeg4_version>=3) yading@10: s->flipflop_rounding= get_bits1(&s->gb); yading@10: else yading@10: s->flipflop_rounding= 0; yading@10: } yading@10: else if(leftflipflop_rounding= 0; yading@10: if(s->msmpeg4_version != 2) yading@10: av_log(s->avctx, AV_LOG_ERROR, "ext header missing, %d left\n", left); yading@10: } yading@10: else yading@10: { yading@10: av_log(s->avctx, AV_LOG_ERROR, "I frame too long, ignoring ext header\n"); yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static int msmpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr) yading@10: { yading@10: int level, pred; yading@10: yading@10: if(s->msmpeg4_version<=2){ yading@10: if (n < 4) { yading@10: level = get_vlc2(&s->gb, v2_dc_lum_vlc.table, DC_VLC_BITS, 3); yading@10: } else { yading@10: level = get_vlc2(&s->gb, v2_dc_chroma_vlc.table, DC_VLC_BITS, 3); yading@10: } yading@10: if (level < 0) yading@10: return -1; yading@10: level-=256; yading@10: }else{ //FIXME optimize use unified tables & index yading@10: if (n < 4) { yading@10: level = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3); yading@10: } else { yading@10: level = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3); yading@10: } yading@10: if (level < 0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n"); yading@10: return -1; yading@10: } yading@10: yading@10: if (level == DC_MAX) { yading@10: level = get_bits(&s->gb, 8); yading@10: if (get_bits1(&s->gb)) yading@10: level = -level; yading@10: } else if (level != 0) { yading@10: if (get_bits1(&s->gb)) yading@10: level = -level; yading@10: } yading@10: } yading@10: yading@10: if(s->msmpeg4_version==1){ yading@10: int32_t *dc_val; yading@10: pred = msmpeg4v1_pred_dc(s, n, &dc_val); yading@10: level += pred; yading@10: yading@10: /* update predictor */ yading@10: *dc_val= level; yading@10: }else{ yading@10: int16_t *dc_val; yading@10: pred = ff_msmpeg4_pred_dc(s, n, &dc_val, dir_ptr); yading@10: level += pred; yading@10: yading@10: /* update predictor */ yading@10: if (n < 4) { yading@10: *dc_val = level * s->y_dc_scale; yading@10: } else { yading@10: *dc_val = level * s->c_dc_scale; yading@10: } yading@10: } yading@10: yading@10: return level; yading@10: } yading@10: yading@10: //#define ERROR_DETAILS yading@10: int ff_msmpeg4_decode_block(MpegEncContext * s, int16_t * block, yading@10: int n, int coded, const uint8_t *scan_table) yading@10: { yading@10: int level, i, last, run, run_diff; yading@10: int av_uninit(dc_pred_dir); yading@10: RLTable *rl; yading@10: RL_VLC_ELEM *rl_vlc; yading@10: int qmul, qadd; yading@10: yading@10: if (s->mb_intra) { yading@10: qmul=1; yading@10: qadd=0; yading@10: yading@10: /* DC coef */ yading@10: level = msmpeg4_decode_dc(s, n, &dc_pred_dir); yading@10: yading@10: if (level < 0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "dc overflow- block: %d qscale: %d//\n", n, s->qscale); yading@10: if(s->inter_intra_pred) level=0; yading@10: } yading@10: if (n < 4) { yading@10: rl = &ff_rl_table[s->rl_table_index]; yading@10: if(level > 256*s->y_dc_scale){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "dc overflow+ L qscale: %d//\n", s->qscale); yading@10: if(!s->inter_intra_pred) return -1; yading@10: } yading@10: } else { yading@10: rl = &ff_rl_table[3 + s->rl_chroma_table_index]; yading@10: if(level > 256*s->c_dc_scale){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "dc overflow+ C qscale: %d//\n", s->qscale); yading@10: if(!s->inter_intra_pred) return -1; yading@10: } yading@10: } yading@10: block[0] = level; yading@10: yading@10: run_diff = s->msmpeg4_version >= 4; yading@10: i = 0; yading@10: if (!coded) { yading@10: goto not_coded; yading@10: } yading@10: if (s->ac_pred) { yading@10: if (dc_pred_dir == 0) yading@10: scan_table = s->intra_v_scantable.permutated; /* left */ yading@10: else yading@10: scan_table = s->intra_h_scantable.permutated; /* top */ yading@10: } else { yading@10: scan_table = s->intra_scantable.permutated; yading@10: } yading@10: rl_vlc= rl->rl_vlc[0]; yading@10: } else { yading@10: qmul = s->qscale << 1; yading@10: qadd = (s->qscale - 1) | 1; yading@10: i = -1; yading@10: rl = &ff_rl_table[3 + s->rl_table_index]; yading@10: yading@10: if(s->msmpeg4_version==2) yading@10: run_diff = 0; yading@10: else yading@10: run_diff = 1; yading@10: yading@10: if (!coded) { yading@10: s->block_last_index[n] = i; yading@10: return 0; yading@10: } yading@10: if(!scan_table) yading@10: scan_table = s->inter_scantable.permutated; yading@10: rl_vlc= rl->rl_vlc[s->qscale]; yading@10: } yading@10: { yading@10: OPEN_READER(re, &s->gb); yading@10: for(;;) { yading@10: UPDATE_CACHE(re, &s->gb); yading@10: GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 0); yading@10: if (level==0) { yading@10: int cache; yading@10: cache= GET_CACHE(re, &s->gb); yading@10: /* escape */ yading@10: if (s->msmpeg4_version==1 || (cache&0x80000000)==0) { yading@10: if (s->msmpeg4_version==1 || (cache&0x40000000)==0) { yading@10: /* third escape */ yading@10: if(s->msmpeg4_version!=1) LAST_SKIP_BITS(re, &s->gb, 2); yading@10: UPDATE_CACHE(re, &s->gb); yading@10: if(s->msmpeg4_version<=3){ yading@10: last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1); yading@10: run= SHOW_UBITS(re, &s->gb, 6); SKIP_CACHE(re, &s->gb, 6); yading@10: level= SHOW_SBITS(re, &s->gb, 8); yading@10: SKIP_COUNTER(re, &s->gb, 1+6+8); yading@10: }else{ yading@10: int sign; yading@10: last= SHOW_UBITS(re, &s->gb, 1); SKIP_BITS(re, &s->gb, 1); yading@10: if(!s->esc3_level_length){ yading@10: int ll; yading@10: av_dlog(s->avctx, "ESC-3 %X at %d %d\n", yading@10: show_bits(&s->gb, 24), s->mb_x, s->mb_y); yading@10: if(s->qscale<8){ yading@10: ll= SHOW_UBITS(re, &s->gb, 3); SKIP_BITS(re, &s->gb, 3); yading@10: if(ll==0){ yading@10: ll= 8+SHOW_UBITS(re, &s->gb, 1); SKIP_BITS(re, &s->gb, 1); yading@10: } yading@10: }else{ yading@10: ll=2; yading@10: while(ll<8 && SHOW_UBITS(re, &s->gb, 1)==0){ yading@10: ll++; yading@10: SKIP_BITS(re, &s->gb, 1); yading@10: } yading@10: if(ll<8) SKIP_BITS(re, &s->gb, 1); yading@10: } yading@10: yading@10: s->esc3_level_length= ll; yading@10: s->esc3_run_length= SHOW_UBITS(re, &s->gb, 2) + 3; SKIP_BITS(re, &s->gb, 2); yading@10: UPDATE_CACHE(re, &s->gb); yading@10: } yading@10: run= SHOW_UBITS(re, &s->gb, s->esc3_run_length); yading@10: SKIP_BITS(re, &s->gb, s->esc3_run_length); yading@10: yading@10: sign= SHOW_UBITS(re, &s->gb, 1); yading@10: SKIP_BITS(re, &s->gb, 1); yading@10: yading@10: level= SHOW_UBITS(re, &s->gb, s->esc3_level_length); yading@10: SKIP_BITS(re, &s->gb, s->esc3_level_length); yading@10: if(sign) level= -level; yading@10: } yading@10: yading@10: #if 0 // waste of time / this will detect very few errors yading@10: { yading@10: const int abs_level= FFABS(level); yading@10: const int run1= run - rl->max_run[last][abs_level] - run_diff; yading@10: if(abs_level<=MAX_LEVEL && run<=MAX_RUN){ yading@10: if(abs_level <= rl->max_level[last][run]){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, vlc encoding possible\n"); yading@10: return DECODING_AC_LOST; yading@10: } yading@10: if(abs_level <= rl->max_level[last][run]*2){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 1 encoding possible\n"); yading@10: return DECODING_AC_LOST; yading@10: } yading@10: if(run1>=0 && abs_level <= rl->max_level[last][run1]){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 2 encoding possible\n"); yading@10: return DECODING_AC_LOST; yading@10: } yading@10: } yading@10: } yading@10: #endif yading@10: //level = level * qmul + (level>0) * qadd - (level<=0) * qadd ; yading@10: if (level>0) level= level * qmul + qadd; yading@10: else level= level * qmul - qadd; yading@10: #if 0 // waste of time too :( yading@10: if(level>2048 || level<-2048){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "|level| overflow in 3. esc\n"); yading@10: return DECODING_AC_LOST; yading@10: } yading@10: #endif yading@10: i+= run + 1; yading@10: if(last) i+=192; yading@10: #ifdef ERROR_DETAILS yading@10: if(run==66) yading@10: av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code in ESC3 level=%d\n", level); yading@10: else if((i>62 && i<192) || i>192+63) yading@10: av_log(s->avctx, AV_LOG_ERROR, "run overflow in ESC3 i=%d run=%d level=%d\n", i, run, level); yading@10: #endif yading@10: } else { yading@10: /* second escape */ yading@10: SKIP_BITS(re, &s->gb, 2); yading@10: GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); yading@10: i+= run + rl->max_run[run>>7][level/qmul] + run_diff; //FIXME opt indexing yading@10: level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); yading@10: LAST_SKIP_BITS(re, &s->gb, 1); yading@10: #ifdef ERROR_DETAILS yading@10: if(run==66) yading@10: av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code in ESC2 level=%d\n", level); yading@10: else if((i>62 && i<192) || i>192+63) yading@10: av_log(s->avctx, AV_LOG_ERROR, "run overflow in ESC2 i=%d run=%d level=%d\n", i, run, level); yading@10: #endif yading@10: } yading@10: } else { yading@10: /* first escape */ yading@10: SKIP_BITS(re, &s->gb, 1); yading@10: GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); yading@10: i+= run; yading@10: level = level + rl->max_level[run>>7][(run-1)&63] * qmul;//FIXME opt indexing yading@10: level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); yading@10: LAST_SKIP_BITS(re, &s->gb, 1); yading@10: #ifdef ERROR_DETAILS yading@10: if(run==66) yading@10: av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code in ESC1 level=%d\n", level); yading@10: else if((i>62 && i<192) || i>192+63) yading@10: av_log(s->avctx, AV_LOG_ERROR, "run overflow in ESC1 i=%d run=%d level=%d\n", i, run, level); yading@10: #endif yading@10: } yading@10: } else { yading@10: i+= run; yading@10: level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); yading@10: LAST_SKIP_BITS(re, &s->gb, 1); yading@10: #ifdef ERROR_DETAILS yading@10: if(run==66) yading@10: av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code level=%d\n", level); yading@10: else if((i>62 && i<192) || i>192+63) yading@10: av_log(s->avctx, AV_LOG_ERROR, "run overflow i=%d run=%d level=%d\n", i, run, level); yading@10: #endif yading@10: } yading@10: if (i > 62){ yading@10: i-= 192; yading@10: if(i&(~63)){ yading@10: const int left= get_bits_left(&s->gb); yading@10: if(((i+192 == 64 && level/qmul==-1) || !(s->err_recognition&(AV_EF_BITSTREAM|AV_EF_COMPLIANT))) && left>=0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "ignoring overflow at %d %d\n", s->mb_x, s->mb_y); yading@10: i = 63; yading@10: break; yading@10: }else{ yading@10: av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); yading@10: return -1; yading@10: } yading@10: } yading@10: yading@10: block[scan_table[i]] = level; yading@10: break; yading@10: } yading@10: yading@10: block[scan_table[i]] = level; yading@10: } yading@10: CLOSE_READER(re, &s->gb); yading@10: } yading@10: not_coded: yading@10: if (s->mb_intra) { yading@10: ff_mpeg4_pred_ac(s, block, n, dc_pred_dir); yading@10: if (s->ac_pred) { yading@10: i = 63; /* XXX: not optimal */ yading@10: } yading@10: } yading@10: if(s->msmpeg4_version>=4 && i>0) i=63; //FIXME/XXX optimize yading@10: s->block_last_index[n] = i; yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: int ff_msmpeg4_decode_motion(MpegEncContext * s, yading@10: int *mx_ptr, int *my_ptr) yading@10: { yading@10: MVTable *mv; yading@10: int code, mx, my; yading@10: yading@10: mv = &ff_mv_tables[s->mv_table_index]; yading@10: yading@10: code = get_vlc2(&s->gb, mv->vlc.table, MV_VLC_BITS, 2); yading@10: if (code < 0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "illegal MV code at %d %d\n", s->mb_x, s->mb_y); yading@10: return -1; yading@10: } yading@10: if (code == mv->n) { yading@10: mx = get_bits(&s->gb, 6); yading@10: my = get_bits(&s->gb, 6); yading@10: } else { yading@10: mx = mv->table_mvx[code]; yading@10: my = mv->table_mvy[code]; yading@10: } yading@10: yading@10: mx += *mx_ptr - 32; yading@10: my += *my_ptr - 32; yading@10: /* WARNING : they do not do exactly modulo encoding */ yading@10: if (mx <= -64) yading@10: mx += 64; yading@10: else if (mx >= 64) yading@10: mx -= 64; yading@10: yading@10: if (my <= -64) yading@10: my += 64; yading@10: else if (my >= 64) yading@10: my -= 64; yading@10: *mx_ptr = mx; yading@10: *my_ptr = my; yading@10: return 0; yading@10: } yading@10: yading@10: AVCodec ff_msmpeg4v1_decoder = { yading@10: .name = "msmpeg4v1", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .id = AV_CODEC_ID_MSMPEG4V1, yading@10: .priv_data_size = sizeof(MpegEncContext), yading@10: .init = ff_msmpeg4_decode_init, yading@10: .close = ff_h263_decode_end, yading@10: .decode = ff_h263_decode_frame, yading@10: .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, yading@10: .max_lowres = 3, yading@10: .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 1"), yading@10: .pix_fmts = ff_pixfmt_list_420, yading@10: }; yading@10: yading@10: AVCodec ff_msmpeg4v2_decoder = { yading@10: .name = "msmpeg4v2", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .id = AV_CODEC_ID_MSMPEG4V2, yading@10: .priv_data_size = sizeof(MpegEncContext), yading@10: .init = ff_msmpeg4_decode_init, yading@10: .close = ff_h263_decode_end, yading@10: .decode = ff_h263_decode_frame, yading@10: .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, yading@10: .max_lowres = 3, yading@10: .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 2"), yading@10: .pix_fmts = ff_pixfmt_list_420, yading@10: }; yading@10: yading@10: AVCodec ff_msmpeg4v3_decoder = { yading@10: .name = "msmpeg4", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .id = AV_CODEC_ID_MSMPEG4V3, yading@10: .priv_data_size = sizeof(MpegEncContext), yading@10: .init = ff_msmpeg4_decode_init, yading@10: .close = ff_h263_decode_end, yading@10: .decode = ff_h263_decode_frame, yading@10: .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, yading@10: .max_lowres = 3, yading@10: .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 3"), yading@10: .pix_fmts = ff_pixfmt_list_420, yading@10: }; yading@10: yading@10: AVCodec ff_wmv1_decoder = { yading@10: .name = "wmv1", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .id = AV_CODEC_ID_WMV1, yading@10: .priv_data_size = sizeof(MpegEncContext), yading@10: .init = ff_msmpeg4_decode_init, yading@10: .close = ff_h263_decode_end, yading@10: .decode = ff_h263_decode_frame, yading@10: .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, yading@10: .max_lowres = 3, yading@10: .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 7"), yading@10: .pix_fmts = ff_pixfmt_list_420, yading@10: };