| /* |
| * MSMPEG4 backend for encoder and decoder |
| * Copyright (c) 2001 Fabrice Bellard |
| * Copyright (c) 2002-2013 Michael Niedermayer <michaelni@gmx.at> |
| * |
| * msmpeg4v1 & v2 stuff by Michael Niedermayer <michaelni@gmx.at> |
| * |
| * 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 |
| */ |
| |
| #include "avcodec.h" |
| #include "internal.h" |
| #include "mpegutils.h" |
| #include "mpegvideo.h" |
| #include "msmpeg4.h" |
| #include "libavutil/imgutils.h" |
| #include "h263.h" |
| #include "mpeg4video.h" |
| #include "msmpeg4data.h" |
| #include "vc1data.h" |
| #include "wmv2.h" |
| |
| #define DC_VLC_BITS 9 |
| #define V2_INTRA_CBPC_VLC_BITS 3 |
| #define V2_MB_TYPE_VLC_BITS 7 |
| #define MV_VLC_BITS 9 |
| #define V2_MV_VLC_BITS 9 |
| #define TEX_VLC_BITS 9 |
| |
| #define DEFAULT_INTER_INDEX 3 |
| |
| static inline int msmpeg4v1_pred_dc(MpegEncContext * s, int n, |
| int32_t **dc_val_ptr) |
| { |
| int i; |
| |
| if (n < 4) { |
| i= 0; |
| } else { |
| i= n-3; |
| } |
| |
| *dc_val_ptr= &s->last_dc[i]; |
| return s->last_dc[i]; |
| } |
| |
| /****************************************/ |
| /* decoding stuff */ |
| |
| VLC ff_mb_non_intra_vlc[4]; |
| static VLC v2_dc_lum_vlc; |
| static VLC v2_dc_chroma_vlc; |
| static VLC v2_intra_cbpc_vlc; |
| static VLC v2_mb_type_vlc; |
| static VLC v2_mv_vlc; |
| VLC ff_inter_intra_vlc; |
| |
| /* This is identical to H.263 except that its range is multiplied by 2. */ |
| static int msmpeg4v2_decode_motion(MpegEncContext * s, int pred, int f_code) |
| { |
| int code, val, sign, shift; |
| |
| code = get_vlc2(&s->gb, v2_mv_vlc.table, V2_MV_VLC_BITS, 2); |
| ff_dlog(s, "MV code %d at %d %d pred: %d\n", code, s->mb_x,s->mb_y, pred); |
| if (code < 0) |
| return 0xffff; |
| |
| if (code == 0) |
| return pred; |
| sign = get_bits1(&s->gb); |
| shift = f_code - 1; |
| val = code; |
| if (shift) { |
| val = (val - 1) << shift; |
| val |= get_bits(&s->gb, shift); |
| val++; |
| } |
| if (sign) |
| val = -val; |
| |
| val += pred; |
| if (val <= -64) |
| val += 64; |
| else if (val >= 64) |
| val -= 64; |
| |
| return val; |
| } |
| |
| static int msmpeg4v12_decode_mb(MpegEncContext *s, int16_t block[6][64]) |
| { |
| int cbp, code, i; |
| uint32_t * const mb_type_ptr = &s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride]; |
| |
| if (s->pict_type == AV_PICTURE_TYPE_P) { |
| if (s->use_skip_mb_code) { |
| if (get_bits1(&s->gb)) { |
| /* skip mb */ |
| s->mb_intra = 0; |
| for(i=0;i<6;i++) |
| s->block_last_index[i] = -1; |
| s->mv_dir = MV_DIR_FORWARD; |
| s->mv_type = MV_TYPE_16X16; |
| s->mv[0][0][0] = 0; |
| s->mv[0][0][1] = 0; |
| s->mb_skipped = 1; |
| *mb_type_ptr = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16; |
| return 0; |
| } |
| } |
| |
| if(s->msmpeg4_version==2) |
| code = get_vlc2(&s->gb, v2_mb_type_vlc.table, V2_MB_TYPE_VLC_BITS, 1); |
| else |
| code = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); |
| if(code<0 || code>7){ |
| av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", code, s->mb_x, s->mb_y); |
| return -1; |
| } |
| |
| s->mb_intra = code >>2; |
| |
| cbp = code & 0x3; |
| } else { |
| s->mb_intra = 1; |
| if(s->msmpeg4_version==2) |
| cbp= get_vlc2(&s->gb, v2_intra_cbpc_vlc.table, V2_INTRA_CBPC_VLC_BITS, 1); |
| else |
| cbp= get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2); |
| if(cbp<0 || cbp>3){ |
| av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y); |
| return -1; |
| } |
| } |
| |
| if (!s->mb_intra) { |
| int mx, my, cbpy; |
| |
| cbpy= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); |
| if(cbpy<0){ |
| av_log(s->avctx, AV_LOG_ERROR, "cbpy %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y); |
| return -1; |
| } |
| |
| cbp|= cbpy<<2; |
| if(s->msmpeg4_version==1 || (cbp&3) != 3) cbp^= 0x3C; |
| |
| ff_h263_pred_motion(s, 0, 0, &mx, &my); |
| mx= msmpeg4v2_decode_motion(s, mx, 1); |
| my= msmpeg4v2_decode_motion(s, my, 1); |
| |
| s->mv_dir = MV_DIR_FORWARD; |
| s->mv_type = MV_TYPE_16X16; |
| s->mv[0][0][0] = mx; |
| s->mv[0][0][1] = my; |
| *mb_type_ptr = MB_TYPE_L0 | MB_TYPE_16x16; |
| } else { |
| int v; |
| if(s->msmpeg4_version==2){ |
| s->ac_pred = get_bits1(&s->gb); |
| v = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); |
| if (v < 0) { |
| av_log(s->avctx, AV_LOG_ERROR, "cbpy vlc invalid\n"); |
| return -1; |
| } |
| cbp|= v<<2; |
| } else{ |
| s->ac_pred = 0; |
| v = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); |
| if (v < 0) { |
| av_log(s->avctx, AV_LOG_ERROR, "cbpy vlc invalid\n"); |
| return -1; |
| } |
| cbp|= v<<2; |
| if(s->pict_type==AV_PICTURE_TYPE_P) cbp^=0x3C; |
| } |
| *mb_type_ptr = MB_TYPE_INTRA; |
| } |
| |
| s->bdsp.clear_blocks(s->block[0]); |
| for (i = 0; i < 6; i++) { |
| if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0) |
| { |
| av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding block: %d x %d (%d)\n", s->mb_x, s->mb_y, i); |
| return -1; |
| } |
| } |
| return 0; |
| } |
| |
| static int msmpeg4v34_decode_mb(MpegEncContext *s, int16_t block[6][64]) |
| { |
| int cbp, code, i; |
| uint8_t *coded_val; |
| uint32_t * const mb_type_ptr = &s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride]; |
| |
| if (get_bits_left(&s->gb) <= 0) |
| return AVERROR_INVALIDDATA; |
| |
| if (s->pict_type == AV_PICTURE_TYPE_P) { |
| if (s->use_skip_mb_code) { |
| if (get_bits1(&s->gb)) { |
| /* skip mb */ |
| s->mb_intra = 0; |
| for(i=0;i<6;i++) |
| s->block_last_index[i] = -1; |
| s->mv_dir = MV_DIR_FORWARD; |
| s->mv_type = MV_TYPE_16X16; |
| s->mv[0][0][0] = 0; |
| s->mv[0][0][1] = 0; |
| s->mb_skipped = 1; |
| *mb_type_ptr = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16; |
| |
| return 0; |
| } |
| } |
| |
| code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[DEFAULT_INTER_INDEX].table, MB_NON_INTRA_VLC_BITS, 3); |
| if (code < 0) |
| return -1; |
| //s->mb_intra = (code & 0x40) ? 0 : 1; |
| s->mb_intra = (~code & 0x40) >> 6; |
| |
| cbp = code & 0x3f; |
| } else { |
| s->mb_intra = 1; |
| code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2); |
| if (code < 0) |
| return -1; |
| /* predict coded block pattern */ |
| cbp = 0; |
| for(i=0;i<6;i++) { |
| int val = ((code >> (5 - i)) & 1); |
| if (i < 4) { |
| int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val); |
| val = val ^ pred; |
| *coded_val = val; |
| } |
| cbp |= val << (5 - i); |
| } |
| } |
| |
| if (!s->mb_intra) { |
| int mx, my; |
| if(s->per_mb_rl_table && cbp){ |
| s->rl_table_index = decode012(&s->gb); |
| s->rl_chroma_table_index = s->rl_table_index; |
| } |
| ff_h263_pred_motion(s, 0, 0, &mx, &my); |
| if (ff_msmpeg4_decode_motion(s, &mx, &my) < 0) |
| return -1; |
| s->mv_dir = MV_DIR_FORWARD; |
| s->mv_type = MV_TYPE_16X16; |
| s->mv[0][0][0] = mx; |
| s->mv[0][0][1] = my; |
| *mb_type_ptr = MB_TYPE_L0 | MB_TYPE_16x16; |
| } else { |
| ff_dlog(s, "I at %d %d %d %06X\n", s->mb_x, s->mb_y, |
| ((cbp & 3) ? 1 : 0) +((cbp & 0x3C)? 2 : 0), |
| show_bits(&s->gb, 24)); |
| s->ac_pred = get_bits1(&s->gb); |
| *mb_type_ptr = MB_TYPE_INTRA; |
| if(s->inter_intra_pred){ |
| s->h263_aic_dir= get_vlc2(&s->gb, ff_inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1); |
| ff_dlog(s, "%d%d %d %d/", |
| s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y); |
| } |
| if(s->per_mb_rl_table && cbp){ |
| s->rl_table_index = decode012(&s->gb); |
| s->rl_chroma_table_index = s->rl_table_index; |
| } |
| } |
| |
| s->bdsp.clear_blocks(s->block[0]); |
| for (i = 0; i < 6; i++) { |
| if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0) |
| { |
| av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding block: %d x %d (%d)\n", s->mb_x, s->mb_y, i); |
| return -1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* init all vlc decoding tables */ |
| av_cold int ff_msmpeg4_decode_init(AVCodecContext *avctx) |
| { |
| MpegEncContext *s = avctx->priv_data; |
| static volatile int done = 0; |
| int i, ret; |
| MVTable *mv; |
| |
| if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0) |
| return ret; |
| |
| if (ff_h263_decode_init(avctx) < 0) |
| return -1; |
| |
| ff_msmpeg4_common_init(s); |
| |
| if (!done) { |
| for(i=0;i<NB_RL_TABLES;i++) { |
| ff_rl_init(&ff_rl_table[i], ff_static_rl_table_store[i]); |
| } |
| INIT_VLC_RL(ff_rl_table[0], 642); |
| INIT_VLC_RL(ff_rl_table[1], 1104); |
| INIT_VLC_RL(ff_rl_table[2], 554); |
| INIT_VLC_RL(ff_rl_table[3], 940); |
| INIT_VLC_RL(ff_rl_table[4], 962); |
| INIT_VLC_RL(ff_rl_table[5], 554); |
| |
| mv = &ff_mv_tables[0]; |
| INIT_VLC_STATIC(&mv->vlc, MV_VLC_BITS, mv->n + 1, |
| mv->table_mv_bits, 1, 1, |
| mv->table_mv_code, 2, 2, 3714); |
| mv = &ff_mv_tables[1]; |
| INIT_VLC_STATIC(&mv->vlc, MV_VLC_BITS, mv->n + 1, |
| mv->table_mv_bits, 1, 1, |
| mv->table_mv_code, 2, 2, 2694); |
| |
| INIT_VLC_STATIC(&ff_msmp4_dc_luma_vlc[0], DC_VLC_BITS, 120, |
| &ff_table0_dc_lum[0][1], 8, 4, |
| &ff_table0_dc_lum[0][0], 8, 4, 1158); |
| INIT_VLC_STATIC(&ff_msmp4_dc_chroma_vlc[0], DC_VLC_BITS, 120, |
| &ff_table0_dc_chroma[0][1], 8, 4, |
| &ff_table0_dc_chroma[0][0], 8, 4, 1118); |
| INIT_VLC_STATIC(&ff_msmp4_dc_luma_vlc[1], DC_VLC_BITS, 120, |
| &ff_table1_dc_lum[0][1], 8, 4, |
| &ff_table1_dc_lum[0][0], 8, 4, 1476); |
| INIT_VLC_STATIC(&ff_msmp4_dc_chroma_vlc[1], DC_VLC_BITS, 120, |
| &ff_table1_dc_chroma[0][1], 8, 4, |
| &ff_table1_dc_chroma[0][0], 8, 4, 1216); |
| |
| INIT_VLC_STATIC(&v2_dc_lum_vlc, DC_VLC_BITS, 512, |
| &ff_v2_dc_lum_table[0][1], 8, 4, |
| &ff_v2_dc_lum_table[0][0], 8, 4, 1472); |
| INIT_VLC_STATIC(&v2_dc_chroma_vlc, DC_VLC_BITS, 512, |
| &ff_v2_dc_chroma_table[0][1], 8, 4, |
| &ff_v2_dc_chroma_table[0][0], 8, 4, 1506); |
| |
| INIT_VLC_STATIC(&v2_intra_cbpc_vlc, V2_INTRA_CBPC_VLC_BITS, 4, |
| &ff_v2_intra_cbpc[0][1], 2, 1, |
| &ff_v2_intra_cbpc[0][0], 2, 1, 8); |
| INIT_VLC_STATIC(&v2_mb_type_vlc, V2_MB_TYPE_VLC_BITS, 8, |
| &ff_v2_mb_type[0][1], 2, 1, |
| &ff_v2_mb_type[0][0], 2, 1, 128); |
| INIT_VLC_STATIC(&v2_mv_vlc, V2_MV_VLC_BITS, 33, |
| &ff_mvtab[0][1], 2, 1, |
| &ff_mvtab[0][0], 2, 1, 538); |
| |
| INIT_VLC_STATIC(&ff_mb_non_intra_vlc[0], MB_NON_INTRA_VLC_BITS, 128, |
| &ff_wmv2_inter_table[0][0][1], 8, 4, |
| &ff_wmv2_inter_table[0][0][0], 8, 4, 1636); |
| INIT_VLC_STATIC(&ff_mb_non_intra_vlc[1], MB_NON_INTRA_VLC_BITS, 128, |
| &ff_wmv2_inter_table[1][0][1], 8, 4, |
| &ff_wmv2_inter_table[1][0][0], 8, 4, 2648); |
| INIT_VLC_STATIC(&ff_mb_non_intra_vlc[2], MB_NON_INTRA_VLC_BITS, 128, |
| &ff_wmv2_inter_table[2][0][1], 8, 4, |
| &ff_wmv2_inter_table[2][0][0], 8, 4, 1532); |
| INIT_VLC_STATIC(&ff_mb_non_intra_vlc[3], MB_NON_INTRA_VLC_BITS, 128, |
| &ff_wmv2_inter_table[3][0][1], 8, 4, |
| &ff_wmv2_inter_table[3][0][0], 8, 4, 2488); |
| |
| INIT_VLC_STATIC(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64, |
| &ff_msmp4_mb_i_table[0][1], 4, 2, |
| &ff_msmp4_mb_i_table[0][0], 4, 2, 536); |
| |
| INIT_VLC_STATIC(&ff_inter_intra_vlc, INTER_INTRA_VLC_BITS, 4, |
| &ff_table_inter_intra[0][1], 2, 1, |
| &ff_table_inter_intra[0][0], 2, 1, 8); |
| done = 1; |
| } |
| |
| switch(s->msmpeg4_version){ |
| case 1: |
| case 2: |
| s->decode_mb= msmpeg4v12_decode_mb; |
| break; |
| case 3: |
| case 4: |
| s->decode_mb= msmpeg4v34_decode_mb; |
| break; |
| case 5: |
| if (CONFIG_WMV2_DECODER) |
| s->decode_mb= ff_wmv2_decode_mb; |
| case 6: |
| //FIXME + TODO VC1 decode mb |
| break; |
| } |
| |
| s->slice_height= s->mb_height; //to avoid 1/0 if the first frame is not a keyframe |
| |
| return 0; |
| } |
| |
| int ff_msmpeg4_decode_picture_header(MpegEncContext * s) |
| { |
| int code; |
| |
| // at minimum one bit per macroblock is required at least in a valid frame, |
| // we discard frames much smaller than this. Frames smaller than 1/8 of the |
| // smallest "black/skip" frame generally contain not much recoverable content |
| // while at the same time they have the highest computational requirements |
| // per byte |
| if (get_bits_left(&s->gb) * 8LL < (s->width+15)/16 * ((s->height+15)/16)) |
| return AVERROR_INVALIDDATA; |
| |
| if(s->msmpeg4_version==1){ |
| int start_code = get_bits_long(&s->gb, 32); |
| if(start_code!=0x00000100){ |
| av_log(s->avctx, AV_LOG_ERROR, "invalid startcode\n"); |
| return -1; |
| } |
| |
| skip_bits(&s->gb, 5); // frame number */ |
| } |
| |
| s->pict_type = get_bits(&s->gb, 2) + 1; |
| if (s->pict_type != AV_PICTURE_TYPE_I && |
| s->pict_type != AV_PICTURE_TYPE_P){ |
| av_log(s->avctx, AV_LOG_ERROR, "invalid picture type\n"); |
| return -1; |
| } |
| s->chroma_qscale= s->qscale = get_bits(&s->gb, 5); |
| if(s->qscale==0){ |
| av_log(s->avctx, AV_LOG_ERROR, "invalid qscale\n"); |
| return -1; |
| } |
| |
| if (s->pict_type == AV_PICTURE_TYPE_I) { |
| code = get_bits(&s->gb, 5); |
| if(s->msmpeg4_version==1){ |
| if(code==0 || code>s->mb_height){ |
| av_log(s->avctx, AV_LOG_ERROR, "invalid slice height %d\n", code); |
| return -1; |
| } |
| |
| s->slice_height = code; |
| }else{ |
| /* 0x17: one slice, 0x18: two slices, ... */ |
| if (code < 0x17){ |
| av_log(s->avctx, AV_LOG_ERROR, "error, slice code was %X\n", code); |
| return -1; |
| } |
| |
| s->slice_height = s->mb_height / (code - 0x16); |
| } |
| |
| switch(s->msmpeg4_version){ |
| case 1: |
| case 2: |
| s->rl_chroma_table_index = 2; |
| s->rl_table_index = 2; |
| |
| s->dc_table_index = 0; //not used |
| break; |
| case 3: |
| s->rl_chroma_table_index = decode012(&s->gb); |
| s->rl_table_index = decode012(&s->gb); |
| |
| s->dc_table_index = get_bits1(&s->gb); |
| break; |
| case 4: |
| ff_msmpeg4_decode_ext_header(s, (2+5+5+17+7)/8); |
| |
| if(s->bit_rate > MBAC_BITRATE) s->per_mb_rl_table= get_bits1(&s->gb); |
| else s->per_mb_rl_table= 0; |
| |
| if(!s->per_mb_rl_table){ |
| s->rl_chroma_table_index = decode012(&s->gb); |
| s->rl_table_index = decode012(&s->gb); |
| } |
| |
| s->dc_table_index = get_bits1(&s->gb); |
| s->inter_intra_pred= 0; |
| break; |
| } |
| s->no_rounding = 1; |
| if(s->avctx->debug&FF_DEBUG_PICT_INFO) |
| av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d slice:%d \n", |
| s->qscale, |
| s->rl_chroma_table_index, |
| s->rl_table_index, |
| s->dc_table_index, |
| s->per_mb_rl_table, |
| s->slice_height); |
| } else { |
| switch(s->msmpeg4_version){ |
| case 1: |
| case 2: |
| if(s->msmpeg4_version==1) |
| s->use_skip_mb_code = 1; |
| else |
| s->use_skip_mb_code = get_bits1(&s->gb); |
| s->rl_table_index = 2; |
| s->rl_chroma_table_index = s->rl_table_index; |
| s->dc_table_index = 0; //not used |
| s->mv_table_index = 0; |
| break; |
| case 3: |
| s->use_skip_mb_code = get_bits1(&s->gb); |
| s->rl_table_index = decode012(&s->gb); |
| s->rl_chroma_table_index = s->rl_table_index; |
| |
| s->dc_table_index = get_bits1(&s->gb); |
| |
| s->mv_table_index = get_bits1(&s->gb); |
| break; |
| case 4: |
| s->use_skip_mb_code = get_bits1(&s->gb); |
| |
| if(s->bit_rate > MBAC_BITRATE) s->per_mb_rl_table= get_bits1(&s->gb); |
| else s->per_mb_rl_table= 0; |
| |
| if(!s->per_mb_rl_table){ |
| s->rl_table_index = decode012(&s->gb); |
| s->rl_chroma_table_index = s->rl_table_index; |
| } |
| |
| s->dc_table_index = get_bits1(&s->gb); |
| |
| s->mv_table_index = get_bits1(&s->gb); |
| s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE); |
| break; |
| } |
| |
| if(s->avctx->debug&FF_DEBUG_PICT_INFO) |
| av_log(s->avctx, AV_LOG_DEBUG, "skip:%d rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d \n", |
| s->use_skip_mb_code, |
| s->rl_table_index, |
| s->rl_chroma_table_index, |
| s->dc_table_index, |
| s->mv_table_index, |
| s->per_mb_rl_table, |
| s->qscale); |
| |
| if(s->flipflop_rounding){ |
| s->no_rounding ^= 1; |
| }else{ |
| s->no_rounding = 0; |
| } |
| } |
| ff_dlog(s->avctx, "%d %"PRId64" %d %d %d\n", s->pict_type, s->bit_rate, |
| s->inter_intra_pred, s->width, s->height); |
| |
| s->esc3_level_length= 0; |
| s->esc3_run_length= 0; |
| |
| return 0; |
| } |
| |
| int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size) |
| { |
| int left= buf_size*8 - get_bits_count(&s->gb); |
| int length= s->msmpeg4_version>=3 ? 17 : 16; |
| /* the alt_bitstream reader could read over the end so we need to check it */ |
| if(left>=length && left<length+8) |
| { |
| skip_bits(&s->gb, 5); /* fps */ |
| s->bit_rate= get_bits(&s->gb, 11)*1024; |
| if(s->msmpeg4_version>=3) |
| s->flipflop_rounding= get_bits1(&s->gb); |
| else |
| s->flipflop_rounding= 0; |
| } |
| else if(left<length+8) |
| { |
| s->flipflop_rounding= 0; |
| if(s->msmpeg4_version != 2) |
| av_log(s->avctx, AV_LOG_ERROR, "ext header missing, %d left\n", left); |
| } |
| else |
| { |
| av_log(s->avctx, AV_LOG_ERROR, "I-frame too long, ignoring ext header\n"); |
| } |
| |
| return 0; |
| } |
| |
| static int msmpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr) |
| { |
| int level, pred; |
| |
| if(s->msmpeg4_version<=2){ |
| if (n < 4) { |
| level = get_vlc2(&s->gb, v2_dc_lum_vlc.table, DC_VLC_BITS, 3); |
| } else { |
| level = get_vlc2(&s->gb, v2_dc_chroma_vlc.table, DC_VLC_BITS, 3); |
| } |
| if (level < 0) { |
| av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n"); |
| *dir_ptr = 0; |
| return -1; |
| } |
| level-=256; |
| }else{ //FIXME optimize use unified tables & index |
| if (n < 4) { |
| level = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3); |
| } else { |
| level = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3); |
| } |
| if (level < 0){ |
| av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n"); |
| *dir_ptr = 0; |
| return -1; |
| } |
| |
| if (level == DC_MAX) { |
| level = get_bits(&s->gb, 8); |
| if (get_bits1(&s->gb)) |
| level = -level; |
| } else if (level != 0) { |
| if (get_bits1(&s->gb)) |
| level = -level; |
| } |
| } |
| |
| if(s->msmpeg4_version==1){ |
| int32_t *dc_val; |
| pred = msmpeg4v1_pred_dc(s, n, &dc_val); |
| level += pred; |
| |
| /* update predictor */ |
| *dc_val= level; |
| }else{ |
| int16_t *dc_val; |
| pred = ff_msmpeg4_pred_dc(s, n, &dc_val, dir_ptr); |
| level += pred; |
| |
| /* update predictor */ |
| if (n < 4) { |
| *dc_val = level * s->y_dc_scale; |
| } else { |
| *dc_val = level * s->c_dc_scale; |
| } |
| } |
| |
| return level; |
| } |
| |
| int ff_msmpeg4_decode_block(MpegEncContext * s, int16_t * block, |
| int n, int coded, const uint8_t *scan_table) |
| { |
| int level, i, last, run, run_diff; |
| int av_uninit(dc_pred_dir); |
| RLTable *rl; |
| RL_VLC_ELEM *rl_vlc; |
| int qmul, qadd; |
| |
| if (s->mb_intra) { |
| qmul=1; |
| qadd=0; |
| |
| /* DC coef */ |
| level = msmpeg4_decode_dc(s, n, &dc_pred_dir); |
| |
| if (level < 0){ |
| av_log(s->avctx, AV_LOG_ERROR, "dc overflow- block: %d qscale: %d//\n", n, s->qscale); |
| if(s->inter_intra_pred) level=0; |
| } |
| if (n < 4) { |
| rl = &ff_rl_table[s->rl_table_index]; |
| if(level > 256*s->y_dc_scale){ |
| av_log(s->avctx, AV_LOG_ERROR, "dc overflow+ L qscale: %d//\n", s->qscale); |
| if(!s->inter_intra_pred) return -1; |
| } |
| } else { |
| rl = &ff_rl_table[3 + s->rl_chroma_table_index]; |
| if(level > 256*s->c_dc_scale){ |
| av_log(s->avctx, AV_LOG_ERROR, "dc overflow+ C qscale: %d//\n", s->qscale); |
| if(!s->inter_intra_pred) return -1; |
| } |
| } |
| block[0] = level; |
| |
| run_diff = s->msmpeg4_version >= 4; |
| i = 0; |
| if (!coded) { |
| goto not_coded; |
| } |
| if (s->ac_pred) { |
| if (dc_pred_dir == 0) |
| scan_table = s->intra_v_scantable.permutated; /* left */ |
| else |
| scan_table = s->intra_h_scantable.permutated; /* top */ |
| } else { |
| scan_table = s->intra_scantable.permutated; |
| } |
| rl_vlc= rl->rl_vlc[0]; |
| } else { |
| qmul = s->qscale << 1; |
| qadd = (s->qscale - 1) | 1; |
| i = -1; |
| rl = &ff_rl_table[3 + s->rl_table_index]; |
| |
| if(s->msmpeg4_version==2) |
| run_diff = 0; |
| else |
| run_diff = 1; |
| |
| if (!coded) { |
| s->block_last_index[n] = i; |
| return 0; |
| } |
| if(!scan_table) |
| scan_table = s->inter_scantable.permutated; |
| rl_vlc= rl->rl_vlc[s->qscale]; |
| } |
| { |
| OPEN_READER(re, &s->gb); |
| for(;;) { |
| UPDATE_CACHE(re, &s->gb); |
| GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 0); |
| if (level==0) { |
| int cache; |
| cache= GET_CACHE(re, &s->gb); |
| /* escape */ |
| if (s->msmpeg4_version==1 || (cache&0x80000000)==0) { |
| if (s->msmpeg4_version==1 || (cache&0x40000000)==0) { |
| /* third escape */ |
| if(s->msmpeg4_version!=1) LAST_SKIP_BITS(re, &s->gb, 2); |
| UPDATE_CACHE(re, &s->gb); |
| if(s->msmpeg4_version<=3){ |
| last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1); |
| run= SHOW_UBITS(re, &s->gb, 6); SKIP_CACHE(re, &s->gb, 6); |
| level= SHOW_SBITS(re, &s->gb, 8); |
| SKIP_COUNTER(re, &s->gb, 1+6+8); |
| }else{ |
| int sign; |
| last= SHOW_UBITS(re, &s->gb, 1); SKIP_BITS(re, &s->gb, 1); |
| if(!s->esc3_level_length){ |
| int ll; |
| ff_dlog(s->avctx, "ESC-3 %X at %d %d\n", |
| show_bits(&s->gb, 24), s->mb_x, s->mb_y); |
| if(s->qscale<8){ |
| ll= SHOW_UBITS(re, &s->gb, 3); SKIP_BITS(re, &s->gb, 3); |
| if(ll==0){ |
| ll= 8+SHOW_UBITS(re, &s->gb, 1); SKIP_BITS(re, &s->gb, 1); |
| } |
| }else{ |
| ll=2; |
| while(ll<8 && SHOW_UBITS(re, &s->gb, 1)==0){ |
| ll++; |
| SKIP_BITS(re, &s->gb, 1); |
| } |
| if(ll<8) SKIP_BITS(re, &s->gb, 1); |
| } |
| |
| s->esc3_level_length= ll; |
| s->esc3_run_length= SHOW_UBITS(re, &s->gb, 2) + 3; SKIP_BITS(re, &s->gb, 2); |
| UPDATE_CACHE(re, &s->gb); |
| } |
| run= SHOW_UBITS(re, &s->gb, s->esc3_run_length); |
| SKIP_BITS(re, &s->gb, s->esc3_run_length); |
| |
| sign= SHOW_UBITS(re, &s->gb, 1); |
| SKIP_BITS(re, &s->gb, 1); |
| |
| level= SHOW_UBITS(re, &s->gb, s->esc3_level_length); |
| SKIP_BITS(re, &s->gb, s->esc3_level_length); |
| if(sign) level= -level; |
| } |
| |
| //level = level * qmul + (level>0) * qadd - (level<=0) * qadd ; |
| if (level>0) level= level * qmul + qadd; |
| else level= level * qmul - qadd; |
| i+= run + 1; |
| if(last) i+=192; |
| } else { |
| /* second escape */ |
| SKIP_BITS(re, &s->gb, 2); |
| GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); |
| i+= run + rl->max_run[run>>7][level/qmul] + run_diff; //FIXME opt indexing |
| level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
| LAST_SKIP_BITS(re, &s->gb, 1); |
| } |
| } else { |
| /* first escape */ |
| SKIP_BITS(re, &s->gb, 1); |
| GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); |
| i+= run; |
| level = level + rl->max_level[run>>7][(run-1)&63] * qmul;//FIXME opt indexing |
| level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
| LAST_SKIP_BITS(re, &s->gb, 1); |
| } |
| } else { |
| i+= run; |
| level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
| LAST_SKIP_BITS(re, &s->gb, 1); |
| } |
| if (i > 62){ |
| i-= 192; |
| if(i&(~63)){ |
| const int left= get_bits_left(&s->gb); |
| if (((i + 192 == 64 && level / qmul == -1) || |
| !(s->avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT))) && |
| left >= 0) { |
| av_log(s->avctx, AV_LOG_ERROR, "ignoring overflow at %d %d\n", s->mb_x, s->mb_y); |
| i = 63; |
| break; |
| }else{ |
| av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); |
| return -1; |
| } |
| } |
| |
| block[scan_table[i]] = level; |
| break; |
| } |
| |
| block[scan_table[i]] = level; |
| } |
| CLOSE_READER(re, &s->gb); |
| } |
| not_coded: |
| if (s->mb_intra) { |
| ff_mpeg4_pred_ac(s, block, n, dc_pred_dir); |
| if (s->ac_pred) { |
| i = 63; /* XXX: not optimal */ |
| } |
| } |
| if(s->msmpeg4_version>=4 && i>0) i=63; //FIXME/XXX optimize |
| s->block_last_index[n] = i; |
| |
| return 0; |
| } |
| |
| int ff_msmpeg4_decode_motion(MpegEncContext * s, |
| int *mx_ptr, int *my_ptr) |
| { |
| MVTable *mv; |
| int code, mx, my; |
| |
| mv = &ff_mv_tables[s->mv_table_index]; |
| |
| code = get_vlc2(&s->gb, mv->vlc.table, MV_VLC_BITS, 2); |
| if (code < 0){ |
| av_log(s->avctx, AV_LOG_ERROR, "illegal MV code at %d %d\n", s->mb_x, s->mb_y); |
| return -1; |
| } |
| if (code == mv->n) { |
| mx = get_bits(&s->gb, 6); |
| my = get_bits(&s->gb, 6); |
| } else { |
| mx = mv->table_mvx[code]; |
| my = mv->table_mvy[code]; |
| } |
| |
| mx += *mx_ptr - 32; |
| my += *my_ptr - 32; |
| /* WARNING : they do not do exactly modulo encoding */ |
| if (mx <= -64) |
| mx += 64; |
| else if (mx >= 64) |
| mx -= 64; |
| |
| if (my <= -64) |
| my += 64; |
| else if (my >= 64) |
| my -= 64; |
| *mx_ptr = mx; |
| *my_ptr = my; |
| return 0; |
| } |
| |
| AVCodec ff_msmpeg4v1_decoder = { |
| .name = "msmpeg4v1", |
| .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 1"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_MSMPEG4V1, |
| .priv_data_size = sizeof(MpegEncContext), |
| .init = ff_msmpeg4_decode_init, |
| .close = ff_h263_decode_end, |
| .decode = ff_h263_decode_frame, |
| .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1, |
| .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM | FF_CODEC_CAP_INIT_CLEANUP, |
| .max_lowres = 3, |
| .pix_fmts = (const enum AVPixelFormat[]) { |
| AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_NONE |
| }, |
| }; |
| |
| AVCodec ff_msmpeg4v2_decoder = { |
| .name = "msmpeg4v2", |
| .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 2"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_MSMPEG4V2, |
| .priv_data_size = sizeof(MpegEncContext), |
| .init = ff_msmpeg4_decode_init, |
| .close = ff_h263_decode_end, |
| .decode = ff_h263_decode_frame, |
| .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1, |
| .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM | FF_CODEC_CAP_INIT_CLEANUP, |
| .max_lowres = 3, |
| .pix_fmts = (const enum AVPixelFormat[]) { |
| AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_NONE |
| }, |
| }; |
| |
| AVCodec ff_msmpeg4v3_decoder = { |
| .name = "msmpeg4", |
| .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 3"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_MSMPEG4V3, |
| .priv_data_size = sizeof(MpegEncContext), |
| .init = ff_msmpeg4_decode_init, |
| .close = ff_h263_decode_end, |
| .decode = ff_h263_decode_frame, |
| .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1, |
| .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM | FF_CODEC_CAP_INIT_CLEANUP, |
| .max_lowres = 3, |
| .pix_fmts = (const enum AVPixelFormat[]) { |
| AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_NONE |
| }, |
| }; |
| |
| AVCodec ff_wmv1_decoder = { |
| .name = "wmv1", |
| .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 7"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_WMV1, |
| .priv_data_size = sizeof(MpegEncContext), |
| .init = ff_msmpeg4_decode_init, |
| .close = ff_h263_decode_end, |
| .decode = ff_h263_decode_frame, |
| .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1, |
| .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM | FF_CODEC_CAP_INIT_CLEANUP, |
| .max_lowres = 3, |
| .pix_fmts = (const enum AVPixelFormat[]) { |
| AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_NONE |
| }, |
| }; |
