yading@10: /* yading@10: * Indeo Video Interactive v4 compatible decoder yading@10: * Copyright (c) 2009-2011 Maxim Poliakovski yading@10: * yading@10: * This file is part of Libav. yading@10: * yading@10: * Libav 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: * Libav 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 Libav; 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 4 decoder yading@10: * yading@10: * Indeo 4 data is usually transported within .avi or .mov files. yading@10: * Known FOURCCs: 'IV41' yading@10: */ yading@10: yading@10: #define BITSTREAM_READER_LE yading@10: #include "avcodec.h" yading@10: #include "get_bits.h" yading@10: #include "ivi_dsp.h" yading@10: #include "ivi_common.h" yading@10: #include "indeo4data.h" yading@10: yading@10: /** yading@10: * Indeo 4 frame types. yading@10: */ yading@10: enum { yading@10: FRAMETYPE_INTRA = 0, yading@10: FRAMETYPE_INTRA1 = 1, ///< intra frame with slightly different bitstream coding yading@10: FRAMETYPE_INTER = 2, ///< non-droppable P-frame yading@10: FRAMETYPE_BIDIR = 3, ///< bidirectional frame yading@10: FRAMETYPE_INTER_NOREF = 4, ///< droppable P-frame yading@10: FRAMETYPE_NULL_FIRST = 5, ///< empty frame with no data yading@10: FRAMETYPE_NULL_LAST = 6 ///< empty frame with no data yading@10: }; yading@10: yading@10: #define IVI4_PIC_SIZE_ESC 7 yading@10: yading@10: yading@10: static const struct { yading@10: InvTransformPtr *inv_trans; yading@10: DCTransformPtr *dc_trans; yading@10: int is_2d_trans; yading@10: } transforms[18] = { yading@10: { ff_ivi_inverse_haar_8x8, ff_ivi_dc_haar_2d, 1 }, yading@10: { NULL, NULL, 0 }, /* inverse Haar 8x1 */ yading@10: { NULL, NULL, 0 }, /* inverse Haar 1x8 */ yading@10: { ff_ivi_put_pixels_8x8, ff_ivi_put_dc_pixel_8x8, 1 }, yading@10: { ff_ivi_inverse_slant_8x8, ff_ivi_dc_slant_2d, 1 }, yading@10: { ff_ivi_row_slant8, ff_ivi_dc_row_slant, 1 }, yading@10: { ff_ivi_col_slant8, ff_ivi_dc_col_slant, 1 }, yading@10: { NULL, NULL, 0 }, /* inverse DCT 8x8 */ yading@10: { NULL, NULL, 0 }, /* inverse DCT 8x1 */ yading@10: { NULL, NULL, 0 }, /* inverse DCT 1x8 */ yading@10: { NULL, NULL, 0 }, /* inverse Haar 4x4 */ yading@10: { ff_ivi_inverse_slant_4x4, ff_ivi_dc_slant_2d, 1 }, yading@10: { NULL, NULL, 0 }, /* no transform 4x4 */ yading@10: { NULL, NULL, 0 }, /* inverse Haar 1x4 */ yading@10: { NULL, NULL, 0 }, /* inverse Haar 4x1 */ yading@10: { NULL, NULL, 0 }, /* inverse slant 1x4 */ yading@10: { NULL, NULL, 0 }, /* inverse slant 4x1 */ yading@10: { NULL, NULL, 0 }, /* inverse DCT 4x4 */ yading@10: }; yading@10: yading@10: /** yading@10: * Decode subdivision of a plane. yading@10: * This is a simplified version that checks for two supported subdivisions: yading@10: * - 1 wavelet band per plane, size factor 1:1, code pattern: 3 yading@10: * - 4 wavelet bands per plane, size factor 1:4, code pattern: 2,3,3,3,3 yading@10: * Anything else is either unsupported or corrupt. yading@10: * yading@10: * @param[in,out] gb the GetBit context yading@10: * @return number of wavelet bands or 0 on error yading@10: */ yading@10: static int decode_plane_subdivision(GetBitContext *gb) yading@10: { yading@10: int i; yading@10: yading@10: switch (get_bits(gb, 2)) { yading@10: case 3: yading@10: return 1; yading@10: case 2: yading@10: for (i = 0; i < 4; i++) yading@10: if (get_bits(gb, 2) != 3) yading@10: return 0; yading@10: return 4; yading@10: default: yading@10: return 0; yading@10: } yading@10: } yading@10: yading@10: static inline int scale_tile_size(int def_size, int size_factor) yading@10: { yading@10: return size_factor == 15 ? def_size : (size_factor + 1) << 5; yading@10: } yading@10: yading@10: /** yading@10: * Decode Indeo 4 picture header. yading@10: * yading@10: * @param[in,out] ctx pointer to the decoder context yading@10: * @param[in] avctx pointer to the AVCodecContext yading@10: * @return result code: 0 = OK, negative number = error yading@10: */ yading@10: static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx) yading@10: { yading@10: int pic_size_indx, i, p; yading@10: IVIPicConfig pic_conf; yading@10: yading@10: if (get_bits(&ctx->gb, 18) != 0x3FFF8) { yading@10: av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n"); yading@10: return AVERROR_INVALIDDATA; 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 == 7) { yading@10: av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d\n", ctx->frame_type); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: #if IVI4_STREAM_ANALYSER yading@10: if (ctx->frame_type == FRAMETYPE_BIDIR) yading@10: ctx->has_b_frames = 1; yading@10: #endif yading@10: yading@10: ctx->transp_status = get_bits1(&ctx->gb); yading@10: #if IVI4_STREAM_ANALYSER yading@10: if (ctx->transp_status) { yading@10: ctx->has_transp = 1; yading@10: } yading@10: #endif yading@10: yading@10: /* unknown bit: Mac decoder ignores this bit, XANIM returns error */ yading@10: if (get_bits1(&ctx->gb)) { yading@10: av_log(avctx, AV_LOG_ERROR, "Sync bit is set!\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: ctx->data_size = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 24) : 0; yading@10: yading@10: /* null frames don't contain anything else so we just return */ yading@10: if (ctx->frame_type >= FRAMETYPE_NULL_FIRST) { yading@10: av_dlog(avctx, "Null frame encountered!\n"); yading@10: return 0; yading@10: } yading@10: yading@10: /* Check key lock status. If enabled - ignore lock word. */ yading@10: /* Usually we have to prompt the user for the password, but */ yading@10: /* we don't do that because Indeo 4 videos can be decoded anyway */ yading@10: if (get_bits1(&ctx->gb)) { yading@10: skip_bits_long(&ctx->gb, 32); yading@10: av_dlog(avctx, "Password-protected clip!\n"); yading@10: } yading@10: yading@10: pic_size_indx = get_bits(&ctx->gb, 3); yading@10: if (pic_size_indx == IVI4_PIC_SIZE_ESC) { yading@10: pic_conf.pic_height = get_bits(&ctx->gb, 16); yading@10: pic_conf.pic_width = get_bits(&ctx->gb, 16); yading@10: } else { yading@10: pic_conf.pic_height = ivi4_common_pic_sizes[pic_size_indx * 2 + 1]; yading@10: pic_conf.pic_width = ivi4_common_pic_sizes[pic_size_indx * 2 ]; yading@10: } yading@10: yading@10: /* Decode tile dimensions. */ yading@10: if (get_bits1(&ctx->gb)) { yading@10: pic_conf.tile_height = scale_tile_size(pic_conf.pic_height, get_bits(&ctx->gb, 4)); yading@10: pic_conf.tile_width = scale_tile_size(pic_conf.pic_width, get_bits(&ctx->gb, 4)); yading@10: #if IVI4_STREAM_ANALYSER yading@10: ctx->uses_tiling = 1; yading@10: #endif yading@10: } else { yading@10: pic_conf.tile_height = pic_conf.pic_height; yading@10: pic_conf.tile_width = pic_conf.pic_width; yading@10: } yading@10: yading@10: /* Decode chroma subsampling. We support only 4:4 aka YVU9. */ yading@10: if (get_bits(&ctx->gb, 2)) { yading@10: av_log(avctx, AV_LOG_ERROR, "Only YVU9 picture format is supported!\n"); yading@10: return AVERROR_INVALIDDATA; 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: /* decode subdivision of the planes */ yading@10: pic_conf.luma_bands = decode_plane_subdivision(&ctx->gb); yading@10: pic_conf.chroma_bands = 0; yading@10: if (pic_conf.luma_bands) yading@10: pic_conf.chroma_bands = decode_plane_subdivision(&ctx->gb); yading@10: ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1; yading@10: if (ctx->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 AVERROR_INVALIDDATA; 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: if (ff_ivi_init_planes(ctx->planes, &pic_conf)) { yading@10: av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n"); yading@10: return AVERROR(ENOMEM); yading@10: } yading@10: yading@10: ctx->pic_conf = pic_conf; yading@10: yading@10: /* set default macroblock/block dimensions */ yading@10: for (p = 0; p <= 2; p++) { yading@10: for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) { yading@10: ctx->planes[p].bands[i].mb_size = !p ? (!ctx->is_scalable ? 16 : 8) : 4; yading@10: ctx->planes[p].bands[i].blk_size = !p ? 8 : 4; yading@10: } yading@10: } yading@10: yading@10: if (ff_ivi_init_tiles(ctx->planes, ctx->pic_conf.tile_width, yading@10: ctx->pic_conf.tile_height)) { yading@10: av_log(avctx, AV_LOG_ERROR, yading@10: "Couldn't reallocate internal structures!\n"); yading@10: return AVERROR(ENOMEM); yading@10: } yading@10: } yading@10: yading@10: ctx->frame_num = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 20) : 0; yading@10: yading@10: /* skip decTimeEst field if present */ yading@10: if (get_bits1(&ctx->gb)) yading@10: skip_bits(&ctx->gb, 8); yading@10: yading@10: /* decode macroblock and block huffman codebooks */ yading@10: if (ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_MB_HUFF, &ctx->mb_vlc, avctx) || yading@10: ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_BLK_HUFF, &ctx->blk_vlc, avctx)) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: ctx->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8; yading@10: yading@10: ctx->in_imf = get_bits1(&ctx->gb); yading@10: ctx->in_q = get_bits1(&ctx->gb); yading@10: yading@10: ctx->pic_glob_quant = get_bits(&ctx->gb, 5); yading@10: yading@10: /* TODO: ignore this parameter if unused */ yading@10: ctx->unknown1 = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 0; yading@10: yading@10: ctx->checksum = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 16) : 0; yading@10: yading@10: /* skip picture header extension if any */ yading@10: while (get_bits1(&ctx->gb)) { yading@10: av_dlog(avctx, "Pic hdr extension encountered!\n"); yading@10: skip_bits(&ctx->gb, 8); yading@10: } yading@10: yading@10: if (get_bits1(&ctx->gb)) { yading@10: av_log(avctx, AV_LOG_ERROR, "Bad blocks bits encountered!\n"); 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 Indeo 4 band header. yading@10: * yading@10: * @param[in,out] ctx pointer to the decoder context yading@10: * @param[in,out] band pointer to the band descriptor yading@10: * @param[in] avctx pointer to the AVCodecContext yading@10: * @return result code: 0 = OK, negative number = error yading@10: */ yading@10: static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band, yading@10: AVCodecContext *avctx) yading@10: { yading@10: int plane, band_num, indx, transform_id, scan_indx; yading@10: int i; yading@10: int quant_mat; yading@10: yading@10: plane = get_bits(&ctx->gb, 2); yading@10: band_num = get_bits(&ctx->gb, 4); yading@10: if (band->plane != plane || band->band_num != band_num) { yading@10: av_log(avctx, AV_LOG_ERROR, "Invalid band header sequence!\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: band->is_empty = get_bits1(&ctx->gb); yading@10: if (!band->is_empty) { yading@10: /* skip header size yading@10: * If header size is not given, header size is 4 bytes. */ yading@10: if (get_bits1(&ctx->gb)) yading@10: skip_bits(&ctx->gb, 16); yading@10: yading@10: band->is_halfpel = get_bits(&ctx->gb, 2); yading@10: if (band->is_halfpel >= 2) { yading@10: av_log(avctx, AV_LOG_ERROR, "Invalid/unsupported mv resolution: %d!\n", yading@10: band->is_halfpel); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: #if IVI4_STREAM_ANALYSER yading@10: if (!band->is_halfpel) yading@10: ctx->uses_fullpel = 1; yading@10: #endif 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: indx = get_bits(&ctx->gb, 2); yading@10: if (indx == 3) { yading@10: av_log(avctx, AV_LOG_ERROR, "Invalid block size!\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: band->mb_size = 16 >> indx; yading@10: band->blk_size = 8 >> (indx >> 1); yading@10: yading@10: band->inherit_mv = get_bits1(&ctx->gb); yading@10: band->inherit_qdelta = get_bits1(&ctx->gb); yading@10: yading@10: band->glob_quant = get_bits(&ctx->gb, 5); yading@10: yading@10: if (!get_bits1(&ctx->gb) || ctx->frame_type == FRAMETYPE_INTRA) { yading@10: transform_id = get_bits(&ctx->gb, 5); yading@10: if (transform_id >= FF_ARRAY_ELEMS(transforms) || yading@10: !transforms[transform_id].inv_trans) { yading@10: avpriv_request_sample(avctx, "Transform %d", transform_id); yading@10: return AVERROR_PATCHWELCOME; yading@10: } yading@10: if ((transform_id >= 7 && transform_id <= 9) || yading@10: transform_id == 17) { yading@10: avpriv_request_sample(avctx, "DCT transform"); yading@10: return AVERROR_PATCHWELCOME; yading@10: } yading@10: yading@10: if (transform_id < 10 && band->blk_size < 8) { yading@10: av_log(avctx, AV_LOG_ERROR, "wrong transform size!\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: #if IVI4_STREAM_ANALYSER yading@10: if ((transform_id >= 0 && transform_id <= 2) || transform_id == 10) yading@10: ctx->uses_haar = 1; yading@10: #endif yading@10: yading@10: band->inv_transform = transforms[transform_id].inv_trans; yading@10: band->dc_transform = transforms[transform_id].dc_trans; yading@10: band->is_2d_trans = transforms[transform_id].is_2d_trans; yading@10: band->transform_size= (transform_id < 10) ? 8 : 4; yading@10: yading@10: scan_indx = get_bits(&ctx->gb, 4); yading@10: if ((scan_indx>4 && scan_indx<10) != (band->blk_size==4)) { yading@10: av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: if (scan_indx == 15) { yading@10: av_log(avctx, AV_LOG_ERROR, "Custom scan pattern encountered!\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: band->scan = scan_index_to_tab[scan_indx]; yading@10: band->scan_size = band->blk_size; yading@10: yading@10: quant_mat = get_bits(&ctx->gb, 5); yading@10: if (quant_mat == 31) { yading@10: av_log(avctx, AV_LOG_ERROR, "Custom quant matrix encountered!\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: if (quant_mat > 21) { yading@10: av_log(avctx, AV_LOG_ERROR, "Invalid quant matrix encountered!\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: band->quant_mat = quant_mat; yading@10: } yading@10: if (quant_index_to_tab[band->quant_mat] > 4 && band->blk_size == 4) { yading@10: av_log(avctx, AV_LOG_ERROR, "Invalid quant matrix for 4x4 block encountered!\n"); yading@10: band->quant_mat = 0; yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: if (band->scan_size != band->blk_size) { yading@10: av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: if (band->transform_size == 8 && band->blk_size < 8) { yading@10: av_log(avctx, AV_LOG_ERROR, "mismatching transform_size!\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: /* decode block huffman codebook */ yading@10: if (ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_BLK_HUFF, yading@10: &band->blk_vlc, avctx)) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: /* select appropriate rvmap table for this band */ yading@10: band->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8; yading@10: yading@10: /* decode rvmap probability corrections if any */ yading@10: band->num_corr = 0; /* there is no corrections */ yading@10: if (get_bits1(&ctx->gb)) { 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 AVERROR_INVALIDDATA; 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: yading@10: if (band->blk_size == 8) { yading@10: band->intra_base = &ivi4_quant_8x8_intra[quant_index_to_tab[band->quant_mat]][0]; yading@10: band->inter_base = &ivi4_quant_8x8_inter[quant_index_to_tab[band->quant_mat]][0]; yading@10: } else { yading@10: band->intra_base = &ivi4_quant_4x4_intra[quant_index_to_tab[band->quant_mat]][0]; yading@10: band->inter_base = &ivi4_quant_4x4_inter[quant_index_to_tab[band->quant_mat]][0]; yading@10: } yading@10: yading@10: /* Indeo 4 doesn't use scale tables */ yading@10: band->intra_scale = NULL; yading@10: band->inter_scale = NULL; yading@10: yading@10: align_get_bits(&ctx->gb); yading@10: yading@10: if (!band->scan) { yading@10: av_log(avctx, AV_LOG_ERROR, "band->scan not set\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Decode information (block type, cbp, quant delta, motion vector) yading@10: * for all macroblocks in the current tile. yading@10: * yading@10: * @param[in,out] ctx pointer to the decoder context yading@10: * @param[in,out] band pointer to the band descriptor yading@10: * @param[in,out] tile pointer to the tile descriptor yading@10: * @param[in] avctx pointer to the AVCodecContext yading@10: * @return result code: 0 = OK, negative number = 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, blks_per_mb, yading@10: mv_scale, mb_type_bits, 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: blks_per_mb = band->mb_size != band->blk_size ? 4 : 1; yading@10: mb_type_bits = ctx->frame_type == FRAMETYPE_BIDIR ? 2 : 1; 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: if (((tile->width + band->mb_size-1)/band->mb_size) * ((tile->height + band->mb_size-1)/band->mb_size) != tile->num_MBs) { yading@10: av_log(avctx, AV_LOG_ERROR, "num_MBs mismatch %d %d %d %d\n", tile->width, tile->height, band->mb_size, tile->num_MBs); yading@10: return -1; yading@10: } 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 AVERROR_INVALIDDATA; 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->in_q) { 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: ctx->frame_type == FRAMETYPE_INTRA1) { yading@10: mb->type = 0; /* mb_type is always INTRA for intra-frames */ yading@10: } else { yading@10: mb->type = get_bits(&ctx->gb, mb_type_bits); yading@10: } yading@10: yading@10: mb->cbp = get_bits(&ctx->gb, blks_per_mb); yading@10: yading@10: mb->q_delta = 0; 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->in_q)) { 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: 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: * Rearrange decoding and reference buffers. yading@10: * yading@10: * @param[in,out] ctx pointer 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_INTRA1: 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_NOREF: yading@10: break; yading@10: } yading@10: yading@10: switch (ctx->frame_type) { yading@10: case FRAMETYPE_INTRA: yading@10: case FRAMETYPE_INTRA1: yading@10: ctx->buf_switch = 0; yading@10: /* FALLTHROUGH */ yading@10: case FRAMETYPE_INTER: 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_NOREF: yading@10: case FRAMETYPE_NULL_FIRST: yading@10: case FRAMETYPE_NULL_LAST: 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_FIRST; yading@10: } yading@10: yading@10: yading@10: static av_cold int decode_init(AVCodecContext *avctx) yading@10: { yading@10: IVI45DecContext *ctx = avctx->priv_data; 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: /* Force allocation of the internal buffers */ yading@10: /* during picture header decoding. */ yading@10: ctx->pic_conf.pic_width = 0; yading@10: ctx->pic_conf.pic_height = 0; yading@10: yading@10: avctx->pix_fmt = AV_PIX_FMT_YUV410P; 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: return 0; yading@10: } yading@10: yading@10: yading@10: AVCodec ff_indeo4_decoder = { yading@10: .name = "indeo4", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .id = AV_CODEC_ID_INDEO4, 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 4"), yading@10: .capabilities = CODEC_CAP_DR1, yading@10: };