yading@10: /* yading@10: * Indeo Video Interactive v5 compatible decoder yading@10: * Copyright (c) 2009 Maxim Poliakovski 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: /** yading@10: * @file yading@10: * Indeo Video Interactive version 5 decoder yading@10: * yading@10: * Indeo5 data is usually transported within .avi or .mov files. yading@10: * Known FOURCCs: 'IV50' yading@10: */ yading@10: yading@10: #define BITSTREAM_READER_LE yading@10: #include "avcodec.h" yading@10: #include "get_bits.h" yading@10: #include "dsputil.h" yading@10: #include "ivi_dsp.h" yading@10: #include "ivi_common.h" yading@10: #include "indeo5data.h" yading@10: yading@10: /** yading@10: * Indeo5 frame types. yading@10: */ yading@10: enum { yading@10: FRAMETYPE_INTRA = 0, yading@10: FRAMETYPE_INTER = 1, ///< non-droppable P-frame yading@10: FRAMETYPE_INTER_SCAL = 2, ///< droppable P-frame used in the scalability mode yading@10: FRAMETYPE_INTER_NOREF = 3, ///< droppable P-frame yading@10: FRAMETYPE_NULL = 4 ///< empty frame with no data yading@10: }; yading@10: yading@10: #define IVI5_PIC_SIZE_ESC 15 yading@10: yading@10: /** yading@10: * Decode Indeo5 GOP (Group of pictures) header. yading@10: * This header is present in key frames only. yading@10: * It defines parameters for all frames in a GOP. yading@10: * yading@10: * @param[in,out] ctx ptr to the decoder context yading@10: * @param[in] avctx ptr to the AVCodecContext yading@10: * @return result code: 0 = OK, -1 = error yading@10: */ yading@10: static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx) yading@10: { yading@10: int result, i, p, tile_size, pic_size_indx, mb_size, blk_size, is_scalable; yading@10: int quant_mat, blk_size_changed = 0; yading@10: IVIBandDesc *band, *band1, *band2; yading@10: IVIPicConfig pic_conf; yading@10: yading@10: ctx->gop_flags = get_bits(&ctx->gb, 8); yading@10: yading@10: ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0; yading@10: yading@10: if (ctx->gop_flags & IVI5_IS_PROTECTED) yading@10: ctx->lock_word = get_bits_long(&ctx->gb, 32); yading@10: yading@10: tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0; yading@10: if (tile_size > 256) { yading@10: av_log(avctx, AV_LOG_ERROR, "Invalid tile size: %d\n", tile_size); yading@10: return -1; yading@10: } yading@10: yading@10: /* decode number of wavelet bands */ yading@10: /* num_levels * 3 + 1 */ yading@10: pic_conf.luma_bands = get_bits(&ctx->gb, 2) * 3 + 1; yading@10: pic_conf.chroma_bands = get_bits1(&ctx->gb) * 3 + 1; yading@10: is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1; yading@10: if (is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) { yading@10: av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n", yading@10: pic_conf.luma_bands, pic_conf.chroma_bands); yading@10: return -1; yading@10: } yading@10: yading@10: pic_size_indx = get_bits(&ctx->gb, 4); yading@10: if (pic_size_indx == IVI5_PIC_SIZE_ESC) { yading@10: pic_conf.pic_height = get_bits(&ctx->gb, 13); yading@10: pic_conf.pic_width = get_bits(&ctx->gb, 13); yading@10: } else { yading@10: pic_conf.pic_height = ivi5_common_pic_sizes[pic_size_indx * 2 + 1] << 2; yading@10: pic_conf.pic_width = ivi5_common_pic_sizes[pic_size_indx * 2 ] << 2; yading@10: } yading@10: yading@10: if (ctx->gop_flags & 2) { yading@10: av_log(avctx, AV_LOG_ERROR, "YV12 picture format not supported!\n"); yading@10: return -1; yading@10: } yading@10: yading@10: pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2; yading@10: pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2; yading@10: yading@10: if (!tile_size) { yading@10: pic_conf.tile_height = pic_conf.pic_height; yading@10: pic_conf.tile_width = pic_conf.pic_width; yading@10: } else { yading@10: pic_conf.tile_height = pic_conf.tile_width = tile_size; yading@10: } yading@10: yading@10: /* check if picture layout was changed and reallocate buffers */ yading@10: if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) { yading@10: result = ff_ivi_init_planes(ctx->planes, &pic_conf); yading@10: if (result) { yading@10: av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n"); yading@10: return -1; yading@10: } yading@10: ctx->pic_conf = pic_conf; yading@10: ctx->is_scalable = is_scalable; yading@10: blk_size_changed = 1; /* force reallocation of the internal structures */ yading@10: } yading@10: yading@10: for (p = 0; p <= 1; p++) { yading@10: for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) { yading@10: band = &ctx->planes[p].bands[i]; yading@10: yading@10: band->is_halfpel = get_bits1(&ctx->gb); yading@10: yading@10: mb_size = get_bits1(&ctx->gb); yading@10: blk_size = 8 >> get_bits1(&ctx->gb); yading@10: mb_size = blk_size << !mb_size; yading@10: yading@10: if (p==0 && blk_size==4) { yading@10: av_log(avctx, AV_LOG_ERROR, "4x4 luma blocks are unsupported!\n"); yading@10: return AVERROR_PATCHWELCOME; yading@10: } yading@10: yading@10: blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size; yading@10: if (blk_size_changed) { yading@10: band->mb_size = mb_size; yading@10: band->blk_size = blk_size; yading@10: } yading@10: yading@10: if (get_bits1(&ctx->gb)) { yading@10: av_log(avctx, AV_LOG_ERROR, "Extended transform info encountered!\n"); yading@10: return -1; yading@10: } yading@10: yading@10: /* select transform function and scan pattern according to plane and band number */ yading@10: switch ((p << 2) + i) { yading@10: case 0: yading@10: band->inv_transform = ff_ivi_inverse_slant_8x8; yading@10: band->dc_transform = ff_ivi_dc_slant_2d; yading@10: band->scan = ff_zigzag_direct; yading@10: band->transform_size= 8; yading@10: break; yading@10: yading@10: case 1: yading@10: band->inv_transform = ff_ivi_row_slant8; yading@10: band->dc_transform = ff_ivi_dc_row_slant; yading@10: band->scan = ff_ivi_vertical_scan_8x8; yading@10: band->transform_size= 8; yading@10: break; yading@10: yading@10: case 2: yading@10: band->inv_transform = ff_ivi_col_slant8; yading@10: band->dc_transform = ff_ivi_dc_col_slant; yading@10: band->scan = ff_ivi_horizontal_scan_8x8; yading@10: band->transform_size= 8; yading@10: break; yading@10: yading@10: case 3: yading@10: band->inv_transform = ff_ivi_put_pixels_8x8; yading@10: band->dc_transform = ff_ivi_put_dc_pixel_8x8; yading@10: band->scan = ff_ivi_horizontal_scan_8x8; yading@10: band->transform_size= 8; yading@10: break; yading@10: yading@10: case 4: yading@10: band->inv_transform = ff_ivi_inverse_slant_4x4; yading@10: band->dc_transform = ff_ivi_dc_slant_2d; yading@10: band->scan = ff_ivi_direct_scan_4x4; yading@10: band->transform_size= 4; yading@10: break; yading@10: } yading@10: yading@10: band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 || yading@10: band->inv_transform == ff_ivi_inverse_slant_4x4; yading@10: yading@10: /* select dequant matrix according to plane and band number */ yading@10: if (!p) { yading@10: quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0; yading@10: } else { yading@10: quant_mat = 5; yading@10: } yading@10: yading@10: if (band->blk_size == 8) { yading@10: if(quant_mat >= 5){ yading@10: av_log(avctx, AV_LOG_ERROR, "quant_mat %d too large!\n", quant_mat); yading@10: return -1; yading@10: } yading@10: band->intra_base = &ivi5_base_quant_8x8_intra[quant_mat][0]; yading@10: band->inter_base = &ivi5_base_quant_8x8_inter[quant_mat][0]; yading@10: band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0]; yading@10: band->inter_scale = &ivi5_scale_quant_8x8_inter[quant_mat][0]; yading@10: } else { yading@10: band->intra_base = ivi5_base_quant_4x4_intra; yading@10: band->inter_base = ivi5_base_quant_4x4_inter; yading@10: band->intra_scale = ivi5_scale_quant_4x4_intra; yading@10: band->inter_scale = ivi5_scale_quant_4x4_inter; yading@10: } yading@10: yading@10: if (get_bits(&ctx->gb, 2)) { yading@10: av_log(avctx, AV_LOG_ERROR, "End marker missing!\n"); yading@10: return -1; yading@10: } yading@10: } yading@10: } yading@10: yading@10: /* copy chroma parameters into the 2nd chroma plane */ yading@10: for (i = 0; i < pic_conf.chroma_bands; i++) { yading@10: band1 = &ctx->planes[1].bands[i]; yading@10: band2 = &ctx->planes[2].bands[i]; yading@10: yading@10: band2->width = band1->width; yading@10: band2->height = band1->height; yading@10: band2->mb_size = band1->mb_size; yading@10: band2->blk_size = band1->blk_size; yading@10: band2->is_halfpel = band1->is_halfpel; yading@10: band2->intra_base = band1->intra_base; yading@10: band2->inter_base = band1->inter_base; yading@10: band2->intra_scale = band1->intra_scale; yading@10: band2->inter_scale = band1->inter_scale; yading@10: band2->scan = band1->scan; yading@10: band2->inv_transform = band1->inv_transform; yading@10: band2->dc_transform = band1->dc_transform; yading@10: band2->is_2d_trans = band1->is_2d_trans; yading@10: band2->transform_size= band1->transform_size; yading@10: } yading@10: yading@10: /* reallocate internal structures if needed */ yading@10: if (blk_size_changed) { yading@10: result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width, yading@10: pic_conf.tile_height); yading@10: if (result) { yading@10: av_log(avctx, AV_LOG_ERROR, yading@10: "Couldn't reallocate internal structures!\n"); yading@10: return -1; yading@10: } yading@10: } yading@10: yading@10: if (ctx->gop_flags & 8) { yading@10: if (get_bits(&ctx->gb, 3)) { yading@10: av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n"); yading@10: return -1; yading@10: } yading@10: yading@10: if (get_bits1(&ctx->gb)) yading@10: skip_bits_long(&ctx->gb, 24); /* skip transparency fill color */ yading@10: } yading@10: yading@10: align_get_bits(&ctx->gb); yading@10: yading@10: skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */ yading@10: yading@10: /* skip GOP extension if any */ yading@10: if (get_bits1(&ctx->gb)) { yading@10: do { yading@10: i = get_bits(&ctx->gb, 16); yading@10: } while (i & 0x8000); yading@10: } yading@10: yading@10: align_get_bits(&ctx->gb); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Skip a header extension. yading@10: * yading@10: * @param[in,out] gb the GetBit context yading@10: */ yading@10: static inline void skip_hdr_extension(GetBitContext *gb) yading@10: { yading@10: int i, len; yading@10: yading@10: do { yading@10: len = get_bits(gb, 8); yading@10: for (i = 0; i < len; i++) skip_bits(gb, 8); yading@10: } while(len); yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Decode Indeo5 picture header. yading@10: * yading@10: * @param[in,out] ctx ptr to the decoder context yading@10: * @param[in] avctx ptr to the AVCodecContext yading@10: * @return result code: 0 = OK, -1 = error yading@10: */ yading@10: static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx) yading@10: { yading@10: if (get_bits(&ctx->gb, 5) != 0x1F) { yading@10: av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n"); yading@10: return -1; yading@10: } yading@10: yading@10: ctx->prev_frame_type = ctx->frame_type; yading@10: ctx->frame_type = get_bits(&ctx->gb, 3); yading@10: if (ctx->frame_type >= 5) { yading@10: av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type); yading@10: return -1; yading@10: } yading@10: yading@10: ctx->frame_num = get_bits(&ctx->gb, 8); yading@10: yading@10: if (ctx->frame_type == FRAMETYPE_INTRA) { yading@10: ctx->gop_invalid = 1; yading@10: if (decode_gop_header(ctx, avctx)) { yading@10: av_log(avctx, AV_LOG_ERROR, "Invalid GOP header, skipping frames.\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: ctx->gop_invalid = 0; yading@10: } yading@10: yading@10: if (ctx->frame_type == FRAMETYPE_INTER_SCAL && !ctx->is_scalable) { yading@10: av_log(avctx, AV_LOG_ERROR, "Scalable inter frame in non scaleable stream\n"); yading@10: ctx->frame_type = FRAMETYPE_INTER; yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: if (ctx->frame_type != FRAMETYPE_NULL) { yading@10: ctx->frame_flags = get_bits(&ctx->gb, 8); yading@10: yading@10: ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits_long(&ctx->gb, 24) : 0; yading@10: yading@10: ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0; yading@10: yading@10: /* skip unknown extension if any */ yading@10: if (ctx->frame_flags & 0x20) yading@10: skip_hdr_extension(&ctx->gb); /* XXX: untested */ yading@10: yading@10: /* decode macroblock huffman codebook */ yading@10: if (ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40, IVI_MB_HUFF, &ctx->mb_vlc, avctx)) yading@10: return -1; yading@10: yading@10: skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */ yading@10: } yading@10: yading@10: align_get_bits(&ctx->gb); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Decode Indeo5 band header. yading@10: * yading@10: * @param[in,out] ctx ptr to the decoder context yading@10: * @param[in,out] band ptr to the band descriptor yading@10: * @param[in] avctx ptr to the AVCodecContext yading@10: * @return result code: 0 = OK, -1 = error yading@10: */ yading@10: static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band, yading@10: AVCodecContext *avctx) yading@10: { yading@10: int i; yading@10: uint8_t band_flags; yading@10: yading@10: band_flags = get_bits(&ctx->gb, 8); yading@10: yading@10: if (band_flags & 1) { yading@10: band->is_empty = 1; yading@10: return 0; yading@10: } yading@10: yading@10: band->data_size = (ctx->frame_flags & 0x80) ? get_bits_long(&ctx->gb, 24) : 0; yading@10: yading@10: band->inherit_mv = band_flags & 2; yading@10: band->inherit_qdelta = band_flags & 8; yading@10: band->qdelta_present = band_flags & 4; yading@10: if (!band->qdelta_present) band->inherit_qdelta = 1; yading@10: yading@10: /* decode rvmap probability corrections if any */ yading@10: band->num_corr = 0; /* there are no corrections */ yading@10: if (band_flags & 0x10) { yading@10: band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */ yading@10: if (band->num_corr > 61) { yading@10: av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n", yading@10: band->num_corr); yading@10: return -1; yading@10: } yading@10: yading@10: /* read correction pairs */ yading@10: for (i = 0; i < band->num_corr * 2; i++) yading@10: band->corr[i] = get_bits(&ctx->gb, 8); yading@10: } yading@10: yading@10: /* select appropriate rvmap table for this band */ yading@10: band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8; yading@10: yading@10: /* decode block huffman codebook */ yading@10: if (ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF, &band->blk_vlc, avctx)) yading@10: return -1; yading@10: yading@10: band->checksum_present = get_bits1(&ctx->gb); yading@10: if (band->checksum_present) yading@10: band->checksum = get_bits(&ctx->gb, 16); yading@10: yading@10: band->glob_quant = get_bits(&ctx->gb, 5); yading@10: yading@10: /* skip unknown extension if any */ yading@10: if (band_flags & 0x20) { /* XXX: untested */ yading@10: align_get_bits(&ctx->gb); yading@10: skip_hdr_extension(&ctx->gb); yading@10: } yading@10: yading@10: align_get_bits(&ctx->gb); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Decode info (block type, cbp, quant delta, motion vector) yading@10: * for all macroblocks in the current tile. yading@10: * yading@10: * @param[in,out] ctx ptr to the decoder context yading@10: * @param[in,out] band ptr to the band descriptor yading@10: * @param[in,out] tile ptr to the tile descriptor yading@10: * @param[in] avctx ptr to the AVCodecContext yading@10: * @return result code: 0 = OK, -1 = error yading@10: */ yading@10: static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band, yading@10: IVITile *tile, AVCodecContext *avctx) yading@10: { yading@10: int x, y, mv_x, mv_y, mv_delta, offs, mb_offset, yading@10: mv_scale, blks_per_mb, s; yading@10: IVIMbInfo *mb, *ref_mb; yading@10: int row_offset = band->mb_size * band->pitch; yading@10: yading@10: mb = tile->mbs; yading@10: ref_mb = tile->ref_mbs; yading@10: offs = tile->ypos * band->pitch + tile->xpos; yading@10: yading@10: if (!ref_mb && yading@10: ((band->qdelta_present && band->inherit_qdelta) || band->inherit_mv)) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: if (tile->num_MBs != IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)) { yading@10: av_log(avctx, AV_LOG_ERROR, "Allocated tile size %d mismatches parameters %d\n", yading@10: tile->num_MBs, IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: /* scale factor for motion vectors */ yading@10: mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3); yading@10: mv_x = mv_y = 0; yading@10: yading@10: for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) { yading@10: mb_offset = offs; yading@10: yading@10: for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) { yading@10: mb->xpos = x; yading@10: mb->ypos = y; yading@10: mb->buf_offs = mb_offset; yading@10: yading@10: if (get_bits1(&ctx->gb)) { yading@10: if (ctx->frame_type == FRAMETYPE_INTRA) { yading@10: av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n"); yading@10: return -1; yading@10: } yading@10: mb->type = 1; /* empty macroblocks are always INTER */ yading@10: mb->cbp = 0; /* all blocks are empty */ yading@10: yading@10: mb->q_delta = 0; yading@10: if (!band->plane && !band->band_num && (ctx->frame_flags & 8)) { yading@10: mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, yading@10: IVI_VLC_BITS, 1); yading@10: mb->q_delta = IVI_TOSIGNED(mb->q_delta); yading@10: } yading@10: yading@10: mb->mv_x = mb->mv_y = 0; /* no motion vector coded */ yading@10: if (band->inherit_mv && ref_mb){ yading@10: /* motion vector inheritance */ yading@10: if (mv_scale) { yading@10: mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); yading@10: mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); yading@10: } else { yading@10: mb->mv_x = ref_mb->mv_x; yading@10: mb->mv_y = ref_mb->mv_y; yading@10: } yading@10: } yading@10: } else { yading@10: if (band->inherit_mv && ref_mb) { yading@10: mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */ yading@10: } else if (ctx->frame_type == FRAMETYPE_INTRA) { yading@10: mb->type = 0; /* mb_type is always INTRA for intra-frames */ yading@10: } else { yading@10: mb->type = get_bits1(&ctx->gb); yading@10: } yading@10: yading@10: blks_per_mb = band->mb_size != band->blk_size ? 4 : 1; yading@10: mb->cbp = get_bits(&ctx->gb, blks_per_mb); yading@10: yading@10: mb->q_delta = 0; yading@10: if (band->qdelta_present) { yading@10: if (band->inherit_qdelta) { yading@10: if (ref_mb) mb->q_delta = ref_mb->q_delta; yading@10: } else if (mb->cbp || (!band->plane && !band->band_num && yading@10: (ctx->frame_flags & 8))) { yading@10: mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, yading@10: IVI_VLC_BITS, 1); yading@10: mb->q_delta = IVI_TOSIGNED(mb->q_delta); yading@10: } yading@10: } yading@10: yading@10: if (!mb->type) { yading@10: mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */ yading@10: } else { yading@10: if (band->inherit_mv && ref_mb){ yading@10: /* motion vector inheritance */ yading@10: if (mv_scale) { yading@10: mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); yading@10: mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); yading@10: } else { yading@10: mb->mv_x = ref_mb->mv_x; yading@10: mb->mv_y = ref_mb->mv_y; yading@10: } yading@10: } else { yading@10: /* decode motion vector deltas */ yading@10: mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, yading@10: IVI_VLC_BITS, 1); yading@10: mv_y += IVI_TOSIGNED(mv_delta); yading@10: mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, yading@10: IVI_VLC_BITS, 1); yading@10: mv_x += IVI_TOSIGNED(mv_delta); yading@10: mb->mv_x = mv_x; yading@10: mb->mv_y = mv_y; yading@10: } yading@10: } yading@10: } yading@10: yading@10: s= band->is_halfpel; yading@10: if (mb->type) yading@10: if ( x + (mb->mv_x >>s) + (y+ (mb->mv_y >>s))*band->pitch < 0 || yading@10: x + ((mb->mv_x+s)>>s) + band->mb_size - 1 yading@10: + (y+band->mb_size - 1 +((mb->mv_y+s)>>s))*band->pitch > band->bufsize - 1) { yading@10: av_log(avctx, AV_LOG_ERROR, "motion vector %d %d outside reference\n", x*s + mb->mv_x, y*s + mb->mv_y); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: mb++; yading@10: if (ref_mb) yading@10: ref_mb++; yading@10: mb_offset += band->mb_size; yading@10: } yading@10: yading@10: offs += row_offset; yading@10: } yading@10: yading@10: align_get_bits(&ctx->gb); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Switch buffers. yading@10: * yading@10: * @param[in,out] ctx ptr to the decoder context yading@10: */ yading@10: static void switch_buffers(IVI45DecContext *ctx) yading@10: { yading@10: switch (ctx->prev_frame_type) { yading@10: case FRAMETYPE_INTRA: yading@10: case FRAMETYPE_INTER: yading@10: ctx->buf_switch ^= 1; yading@10: ctx->dst_buf = ctx->buf_switch; yading@10: ctx->ref_buf = ctx->buf_switch ^ 1; yading@10: break; yading@10: case FRAMETYPE_INTER_SCAL: yading@10: if (!ctx->inter_scal) { yading@10: ctx->ref2_buf = 2; yading@10: ctx->inter_scal = 1; yading@10: } yading@10: FFSWAP(int, ctx->dst_buf, ctx->ref2_buf); yading@10: ctx->ref_buf = ctx->ref2_buf; yading@10: break; yading@10: case FRAMETYPE_INTER_NOREF: yading@10: break; yading@10: } yading@10: yading@10: switch (ctx->frame_type) { yading@10: case FRAMETYPE_INTRA: yading@10: ctx->buf_switch = 0; yading@10: /* FALLTHROUGH */ yading@10: case FRAMETYPE_INTER: yading@10: ctx->inter_scal = 0; yading@10: ctx->dst_buf = ctx->buf_switch; yading@10: ctx->ref_buf = ctx->buf_switch ^ 1; yading@10: break; yading@10: case FRAMETYPE_INTER_SCAL: yading@10: case FRAMETYPE_INTER_NOREF: yading@10: case FRAMETYPE_NULL: yading@10: break; yading@10: } yading@10: } yading@10: yading@10: yading@10: static int is_nonnull_frame(IVI45DecContext *ctx) yading@10: { yading@10: return ctx->frame_type != FRAMETYPE_NULL; yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Initialize Indeo5 decoder. yading@10: */ yading@10: static av_cold int decode_init(AVCodecContext *avctx) yading@10: { yading@10: IVI45DecContext *ctx = avctx->priv_data; yading@10: int result; yading@10: yading@10: ff_ivi_init_static_vlc(); yading@10: yading@10: /* copy rvmap tables in our context so we can apply changes to them */ yading@10: memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs)); yading@10: yading@10: /* set the initial picture layout according to the basic profile: yading@10: there is only one band per plane (no scalability), only one tile (no local decoding) yading@10: and picture format = YVU9 */ yading@10: ctx->pic_conf.pic_width = avctx->width; yading@10: ctx->pic_conf.pic_height = avctx->height; yading@10: ctx->pic_conf.chroma_width = (avctx->width + 3) >> 2; yading@10: ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2; yading@10: ctx->pic_conf.tile_width = avctx->width; yading@10: ctx->pic_conf.tile_height = avctx->height; yading@10: ctx->pic_conf.luma_bands = ctx->pic_conf.chroma_bands = 1; yading@10: yading@10: result = ff_ivi_init_planes(ctx->planes, &ctx->pic_conf); yading@10: if (result) { yading@10: av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n"); yading@10: return -1; yading@10: } yading@10: yading@10: ctx->buf_switch = 0; yading@10: ctx->inter_scal = 0; yading@10: yading@10: ctx->decode_pic_hdr = decode_pic_hdr; yading@10: ctx->decode_band_hdr = decode_band_hdr; yading@10: ctx->decode_mb_info = decode_mb_info; yading@10: ctx->switch_buffers = switch_buffers; yading@10: ctx->is_nonnull_frame = is_nonnull_frame; yading@10: yading@10: avctx->pix_fmt = AV_PIX_FMT_YUV410P; yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: AVCodec ff_indeo5_decoder = { yading@10: .name = "indeo5", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .id = AV_CODEC_ID_INDEO5, yading@10: .priv_data_size = sizeof(IVI45DecContext), yading@10: .init = decode_init, yading@10: .close = ff_ivi_decode_close, yading@10: .decode = ff_ivi_decode_frame, yading@10: .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"), yading@10: .capabilities = CODEC_CAP_DR1, yading@10: };