| /* |
| * Copyright (c) 2002 The FFmpeg Project |
| * |
| * 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 "h263.h" |
| #include "internal.h" |
| #include "intrax8.h" |
| #include "mathops.h" |
| #include "mpegutils.h" |
| #include "mpegvideo.h" |
| #include "msmpeg4.h" |
| #include "msmpeg4data.h" |
| #include "wmv2.h" |
| |
| |
| static int parse_mb_skip(Wmv2Context *w) |
| { |
| int mb_x, mb_y; |
| int coded_mb_count = 0; |
| MpegEncContext *const s = &w->s; |
| uint32_t *const mb_type = s->current_picture_ptr->mb_type; |
| |
| w->skip_type = get_bits(&s->gb, 2); |
| switch (w->skip_type) { |
| case SKIP_TYPE_NONE: |
| for (mb_y = 0; mb_y < s->mb_height; mb_y++) |
| for (mb_x = 0; mb_x < s->mb_width; mb_x++) |
| mb_type[mb_y * s->mb_stride + mb_x] = |
| MB_TYPE_16x16 | MB_TYPE_L0; |
| break; |
| case SKIP_TYPE_MPEG: |
| if (get_bits_left(&s->gb) < s->mb_height * s->mb_width) |
| return AVERROR_INVALIDDATA; |
| for (mb_y = 0; mb_y < s->mb_height; mb_y++) |
| for (mb_x = 0; mb_x < s->mb_width; mb_x++) |
| mb_type[mb_y * s->mb_stride + mb_x] = |
| (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0; |
| break; |
| case SKIP_TYPE_ROW: |
| for (mb_y = 0; mb_y < s->mb_height; mb_y++) { |
| if (get_bits_left(&s->gb) < 1) |
| return AVERROR_INVALIDDATA; |
| if (get_bits1(&s->gb)) { |
| for (mb_x = 0; mb_x < s->mb_width; mb_x++) |
| mb_type[mb_y * s->mb_stride + mb_x] = |
| MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; |
| } else { |
| for (mb_x = 0; mb_x < s->mb_width; mb_x++) |
| mb_type[mb_y * s->mb_stride + mb_x] = |
| (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0; |
| } |
| } |
| break; |
| case SKIP_TYPE_COL: |
| for (mb_x = 0; mb_x < s->mb_width; mb_x++) { |
| if (get_bits_left(&s->gb) < 1) |
| return AVERROR_INVALIDDATA; |
| if (get_bits1(&s->gb)) { |
| for (mb_y = 0; mb_y < s->mb_height; mb_y++) |
| mb_type[mb_y * s->mb_stride + mb_x] = |
| MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; |
| } else { |
| for (mb_y = 0; mb_y < s->mb_height; mb_y++) |
| mb_type[mb_y * s->mb_stride + mb_x] = |
| (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0; |
| } |
| } |
| break; |
| } |
| |
| for (mb_y = 0; mb_y < s->mb_height; mb_y++) |
| for (mb_x = 0; mb_x < s->mb_width; mb_x++) |
| coded_mb_count += !IS_SKIP(mb_type[mb_y * s->mb_stride + mb_x]); |
| |
| if (coded_mb_count > get_bits_left(&s->gb)) |
| return AVERROR_INVALIDDATA; |
| |
| return 0; |
| } |
| |
| static int decode_ext_header(Wmv2Context *w) |
| { |
| MpegEncContext *const s = &w->s; |
| GetBitContext gb; |
| int fps; |
| int code; |
| |
| if (s->avctx->extradata_size < 4) |
| return AVERROR_INVALIDDATA; |
| |
| init_get_bits(&gb, s->avctx->extradata, 32); |
| |
| fps = get_bits(&gb, 5); |
| s->bit_rate = get_bits(&gb, 11) * 1024; |
| w->mspel_bit = get_bits1(&gb); |
| s->loop_filter = get_bits1(&gb); |
| w->abt_flag = get_bits1(&gb); |
| w->j_type_bit = get_bits1(&gb); |
| w->top_left_mv_flag = get_bits1(&gb); |
| w->per_mb_rl_bit = get_bits1(&gb); |
| code = get_bits(&gb, 3); |
| |
| if (code == 0) |
| return AVERROR_INVALIDDATA; |
| |
| s->slice_height = s->mb_height / code; |
| |
| if (s->avctx->debug & FF_DEBUG_PICT_INFO) |
| av_log(s->avctx, AV_LOG_DEBUG, |
| "fps:%d, br:%"PRId64", qpbit:%d, abt_flag:%d, j_type_bit:%d, " |
| "tl_mv_flag:%d, mbrl_bit:%d, code:%d, loop_filter:%d, " |
| "slices:%d\n", |
| fps, s->bit_rate, w->mspel_bit, w->abt_flag, w->j_type_bit, |
| w->top_left_mv_flag, w->per_mb_rl_bit, code, s->loop_filter, |
| code); |
| return 0; |
| } |
| |
| int ff_wmv2_decode_picture_header(MpegEncContext *s) |
| { |
| Wmv2Context *const w = (Wmv2Context *) s; |
| int code; |
| |
| if (s->picture_number == 0) |
| decode_ext_header(w); |
| |
| s->pict_type = get_bits1(&s->gb) + 1; |
| if (s->pict_type == AV_PICTURE_TYPE_I) { |
| code = get_bits(&s->gb, 7); |
| av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code); |
| } |
| s->chroma_qscale = s->qscale = get_bits(&s->gb, 5); |
| if (s->qscale <= 0) |
| return AVERROR_INVALIDDATA; |
| |
| if (s->pict_type != AV_PICTURE_TYPE_I && show_bits(&s->gb, 1)) { |
| GetBitContext gb = s->gb; |
| int skip_type = get_bits(&gb, 2); |
| int run = skip_type == SKIP_TYPE_COL ? s->mb_width : s->mb_height; |
| |
| while (run > 0) { |
| int block = FFMIN(run, 25); |
| if (get_bits(&gb, block) + 1 != 1<<block) |
| break; |
| run -= block; |
| } |
| if (!run) |
| return FRAME_SKIPPED; |
| } |
| |
| return 0; |
| } |
| |
| int ff_wmv2_decode_secondary_picture_header(MpegEncContext *s) |
| { |
| Wmv2Context *const w = (Wmv2Context *) s; |
| |
| if (s->pict_type == AV_PICTURE_TYPE_I) { |
| if (w->j_type_bit) |
| w->j_type = get_bits1(&s->gb); |
| else |
| w->j_type = 0; // FIXME check |
| |
| if (!w->j_type) { |
| if (w->per_mb_rl_bit) |
| 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); |
| |
| // 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; |
| } |
| s->inter_intra_pred = 0; |
| 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 j_type:%d \n", |
| s->qscale, s->rl_chroma_table_index, s->rl_table_index, |
| s->dc_table_index, s->per_mb_rl_table, w->j_type); |
| } |
| } else { |
| int cbp_index; |
| int ret; |
| w->j_type = 0; |
| |
| ret = parse_mb_skip(w); |
| if (ret < 0) |
| return ret; |
| cbp_index = decode012(&s->gb); |
| w->cbp_table_index = wmv2_get_cbp_table_index(s, cbp_index); |
| |
| if (w->mspel_bit) |
| s->mspel = get_bits1(&s->gb); |
| else |
| s->mspel = 0; // FIXME check |
| |
| if (w->abt_flag) { |
| w->per_mb_abt = get_bits1(&s->gb) ^ 1; |
| if (!w->per_mb_abt) |
| w->abt_type = decode012(&s->gb); |
| } |
| |
| if (w->per_mb_rl_bit) |
| 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; |
| } |
| |
| if (get_bits_left(&s->gb) < 2) |
| return AVERROR_INVALIDDATA; |
| |
| s->dc_table_index = get_bits1(&s->gb); |
| s->mv_table_index = get_bits1(&s->gb); |
| |
| s->inter_intra_pred = 0; // (s->width * s->height < 320 * 240 && s->bit_rate <= II_BITRATE); |
| s->no_rounding ^= 1; |
| |
| if (s->avctx->debug & FF_DEBUG_PICT_INFO) { |
| av_log(s->avctx, AV_LOG_DEBUG, |
| "rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d mspel:%d " |
| "per_mb_abt:%d abt_type:%d cbp:%d ii:%d\n", |
| s->rl_table_index, s->rl_chroma_table_index, |
| s->dc_table_index, s->mv_table_index, |
| s->per_mb_rl_table, s->qscale, s->mspel, |
| w->per_mb_abt, w->abt_type, w->cbp_table_index, |
| s->inter_intra_pred); |
| } |
| } |
| s->esc3_level_length = 0; |
| s->esc3_run_length = 0; |
| s->picture_number++; // FIXME ? |
| |
| if (w->j_type) { |
| ff_intrax8_decode_picture(&w->x8, &s->current_picture, |
| &s->gb, &s->mb_x, &s->mb_y, |
| 2 * s->qscale, (s->qscale - 1) | 1, |
| s->loop_filter, s->low_delay); |
| |
| ff_er_add_slice(&w->s.er, 0, 0, |
| (w->s.mb_x >> 1) - 1, (w->s.mb_y >> 1) - 1, |
| ER_MB_END); |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr) |
| { |
| MpegEncContext *const s = &w->s; |
| int ret; |
| |
| ret = ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr); |
| |
| if (ret < 0) |
| return ret; |
| |
| if ((((*mx_ptr) | (*my_ptr)) & 1) && s->mspel) |
| w->hshift = get_bits1(&s->gb); |
| else |
| w->hshift = 0; |
| |
| return 0; |
| } |
| |
| static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py) |
| { |
| MpegEncContext *const s = &w->s; |
| int xy, wrap, diff, type; |
| int16_t *A, *B, *C, *mot_val; |
| |
| wrap = s->b8_stride; |
| xy = s->block_index[0]; |
| |
| mot_val = s->current_picture.motion_val[0][xy]; |
| |
| A = s->current_picture.motion_val[0][xy - 1]; |
| B = s->current_picture.motion_val[0][xy - wrap]; |
| C = s->current_picture.motion_val[0][xy + 2 - wrap]; |
| |
| if (s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag) |
| diff = FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1])); |
| else |
| diff = 0; |
| |
| if (diff >= 8) |
| type = get_bits1(&s->gb); |
| else |
| type = 2; |
| |
| if (type == 0) { |
| *px = A[0]; |
| *py = A[1]; |
| } else if (type == 1) { |
| *px = B[0]; |
| *py = B[1]; |
| } else { |
| /* special case for first (slice) line */ |
| if (s->first_slice_line) { |
| *px = A[0]; |
| *py = A[1]; |
| } else { |
| *px = mid_pred(A[0], B[0], C[0]); |
| *py = mid_pred(A[1], B[1], C[1]); |
| } |
| } |
| |
| return mot_val; |
| } |
| |
| static inline int wmv2_decode_inter_block(Wmv2Context *w, int16_t *block, |
| int n, int cbp) |
| { |
| MpegEncContext *const s = &w->s; |
| static const int sub_cbp_table[3] = { 2, 3, 1 }; |
| int sub_cbp, ret; |
| |
| if (!cbp) { |
| s->block_last_index[n] = -1; |
| return 0; |
| } |
| |
| if (w->per_block_abt) |
| w->abt_type = decode012(&s->gb); |
| w->abt_type_table[n] = w->abt_type; |
| |
| if (w->abt_type) { |
| // const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].permutated; |
| const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].scantable; |
| // const uint8_t *scantable = w->abt_type - 1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable; |
| |
| sub_cbp = sub_cbp_table[decode012(&s->gb)]; |
| |
| if (sub_cbp & 1) |
| if ((ret = ff_msmpeg4_decode_block(s, block, n, 1, scantable)) < 0) |
| return ret; |
| |
| if (sub_cbp & 2) |
| if ((ret = ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable)) < 0) |
| return ret; |
| |
| s->block_last_index[n] = 63; |
| |
| return 0; |
| } else { |
| return ff_msmpeg4_decode_block(s, block, n, 1, |
| s->inter_scantable.permutated); |
| } |
| } |
| |
| int ff_wmv2_decode_mb(MpegEncContext *s, int16_t block[6][64]) |
| { |
| Wmv2Context *const w = (Wmv2Context *) s; |
| int cbp, code, i, ret; |
| uint8_t *coded_val; |
| |
| if (w->j_type) |
| return 0; |
| |
| if (s->pict_type == AV_PICTURE_TYPE_P) { |
| if (IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])) { |
| /* 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; |
| w->hshift = 0; |
| return 0; |
| } |
| if (get_bits_left(&s->gb) <= 0) |
| return AVERROR_INVALIDDATA; |
| |
| code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[w->cbp_table_index].table, |
| MB_NON_INTRA_VLC_BITS, 3); |
| if (code < 0) |
| return AVERROR_INVALIDDATA; |
| s->mb_intra = (~code & 0x40) >> 6; |
| |
| cbp = code & 0x3f; |
| } else { |
| s->mb_intra = 1; |
| if (get_bits_left(&s->gb) <= 0) |
| return AVERROR_INVALIDDATA; |
| code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2); |
| if (code < 0) { |
| av_log(s->avctx, AV_LOG_ERROR, |
| "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y); |
| return AVERROR_INVALIDDATA; |
| } |
| /* 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; |
| wmv2_pred_motion(w, &mx, &my); |
| |
| if (cbp) { |
| s->bdsp.clear_blocks(s->block[0]); |
| if (s->per_mb_rl_table) { |
| s->rl_table_index = decode012(&s->gb); |
| s->rl_chroma_table_index = s->rl_table_index; |
| } |
| |
| if (w->abt_flag && w->per_mb_abt) { |
| w->per_block_abt = get_bits1(&s->gb); |
| if (!w->per_block_abt) |
| w->abt_type = decode012(&s->gb); |
| } else |
| w->per_block_abt = 0; |
| } |
| |
| if ((ret = wmv2_decode_motion(w, &mx, &my)) < 0) |
| return ret; |
| |
| s->mv_dir = MV_DIR_FORWARD; |
| s->mv_type = MV_TYPE_16X16; |
| s->mv[0][0][0] = mx; |
| s->mv[0][0][1] = my; |
| |
| for (i = 0; i < 6; i++) { |
| if ((ret = wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1)) < 0) { |
| av_log(s->avctx, AV_LOG_ERROR, |
| "\nerror while decoding inter block: %d x %d (%d)\n", |
| s->mb_x, s->mb_y, i); |
| return ret; |
| } |
| } |
| } else { |
| if (s->pict_type == AV_PICTURE_TYPE_P) |
| ff_dlog(s->avctx, "%d%d ", s->inter_intra_pred, cbp); |
| ff_dlog(s->avctx, "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); |
| 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->avctx, "%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 ((ret = ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL)) < 0) { |
| av_log(s->avctx, AV_LOG_ERROR, |
| "\nerror while decoding intra block: %d x %d (%d)\n", |
| s->mb_x, s->mb_y, i); |
| return ret; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static av_cold int wmv2_decode_init(AVCodecContext *avctx) |
| { |
| Wmv2Context *const w = avctx->priv_data; |
| int ret; |
| |
| if ((ret = ff_msmpeg4_decode_init(avctx)) < 0) |
| return ret; |
| |
| ff_wmv2_common_init(w); |
| |
| return ff_intrax8_common_init(avctx, &w->x8, &w->s.idsp, |
| w->s.block, w->s.block_last_index, |
| w->s.mb_width, w->s.mb_height); |
| } |
| |
| static av_cold int wmv2_decode_end(AVCodecContext *avctx) |
| { |
| Wmv2Context *w = avctx->priv_data; |
| |
| ff_intrax8_common_end(&w->x8); |
| return ff_h263_decode_end(avctx); |
| } |
| |
| AVCodec ff_wmv2_decoder = { |
| .name = "wmv2", |
| .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_WMV2, |
| .priv_data_size = sizeof(Wmv2Context), |
| .init = wmv2_decode_init, |
| .close = wmv2_decode_end, |
| .decode = ff_h263_decode_frame, |
| .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1, |
| .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, |
| .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_NONE }, |
| }; |
