From adfe0c942e71545f003f9c4d148fbf5d220681bc Mon Sep 17 00:00:00 2001 From: Kostya Shishkov Date: Tue, 6 Dec 2011 14:50:32 +0100 Subject: Indeo 4 decoder Signed-off-by: Kostya Shishkov --- libavcodec/indeo4.c | 823 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 823 insertions(+) create mode 100644 libavcodec/indeo4.c (limited to 'libavcodec/indeo4.c') diff --git a/libavcodec/indeo4.c b/libavcodec/indeo4.c new file mode 100644 index 0000000000..8f6d2eab65 --- /dev/null +++ b/libavcodec/indeo4.c @@ -0,0 +1,823 @@ +/* + * Indeo Video Interactive v4 compatible decoder + * Copyright (c) 2009-2011 Maxim Poliakovski + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * Indeo Video Interactive version 4 decoder + * + * Indeo 4 data is usually transported within .avi or .mov files. + * Known FOURCCs: 'IV41' + */ + +#define BITSTREAM_READER_LE +#include "avcodec.h" +#include "get_bits.h" +#include "dsputil.h" +#include "ivi_dsp.h" +#include "ivi_common.h" +#include "indeo4data.h" + +#define IVI4_STREAM_ANALYSER 0 +#define IVI4_DEBUG_CHECKSUM 0 + +/** + * Indeo 4 frame types. + */ +enum { + FRAMETYPE_INTRA = 0, + FRAMETYPE_BIDIR1 = 1, ///< bidirectional frame + FRAMETYPE_INTER = 2, ///< non-droppable P-frame + FRAMETYPE_BIDIR = 3, ///< bidirectional frame + FRAMETYPE_INTER_NOREF = 4, ///< droppable P-frame + FRAMETYPE_NULL_FIRST = 5, ///< empty frame with no data + FRAMETYPE_NULL_LAST = 6 ///< empty frame with no data +}; + +#define IVI4_PIC_SIZE_ESC 7 + + +typedef struct { + GetBitContext gb; + AVFrame frame; + RVMapDesc rvmap_tabs[9]; ///< local corrected copy of the static rvmap tables + + uint32_t frame_num; + int frame_type; + int prev_frame_type; ///< frame type of the previous frame + uint32_t data_size; ///< size of the frame data in bytes from picture header + int is_scalable; + int transp_status; ///< transparency mode status: 1 - enabled + + IVIPicConfig pic_conf; + IVIPlaneDesc planes[3]; ///< color planes + + int buf_switch; ///< used to switch between three buffers + int dst_buf; ///< buffer index for the currently decoded frame + int ref_buf; ///< inter frame reference buffer index + + IVIHuffTab mb_vlc; ///< current macroblock table descriptor + IVIHuffTab blk_vlc; ///< current block table descriptor + + uint16_t checksum; ///< frame checksum + + uint8_t rvmap_sel; + uint8_t in_imf; + uint8_t in_q; ///< flag for explicitly stored quantiser delta + uint8_t pic_glob_quant; + uint8_t unknown1; + +#if IVI4_STREAM_ANALYSER + uint8_t has_b_frames; + uint8_t has_transp; + uint8_t uses_tiling; + uint8_t uses_haar; + uint8_t uses_fullpel; +#endif +} IVI4DecContext; + + +struct { + InvTransformPtr *inv_trans; + DCTransformPtr *dc_trans; + int is_2d_trans; +} transforms[18] = { + { ff_ivi_inverse_haar_8x8, ff_ivi_dc_haar_2d, 1 }, + { NULL, NULL, 0 }, /* inverse Haar 8x1 */ + { NULL, NULL, 0 }, /* inverse Haar 1x8 */ + { ff_ivi_put_pixels_8x8, ff_ivi_put_dc_pixel_8x8, 1 }, + { ff_ivi_inverse_slant_8x8, ff_ivi_dc_slant_2d, 1 }, + { ff_ivi_row_slant8, ff_ivi_dc_row_slant, 1 }, + { ff_ivi_col_slant8, ff_ivi_dc_col_slant, 1 }, + { NULL, NULL, 0 }, /* inverse DCT 8x8 */ + { NULL, NULL, 0 }, /* inverse DCT 8x1 */ + { NULL, NULL, 0 }, /* inverse DCT 1x8 */ + { NULL, NULL, 0 }, /* inverse Haar 4x4 */ + { ff_ivi_inverse_slant_4x4, ff_ivi_dc_slant_2d, 1 }, + { NULL, NULL, 0 }, /* no transform 4x4 */ + { NULL, NULL, 0 }, /* inverse Haar 1x4 */ + { NULL, NULL, 0 }, /* inverse Haar 4x1 */ + { NULL, NULL, 0 }, /* inverse slant 1x4 */ + { NULL, NULL, 0 }, /* inverse slant 4x1 */ + { NULL, NULL, 0 }, /* inverse DCT 4x4 */ +}; + +/** + * Decode subdivision of a plane. + * This is a simplified version that checks for two supported subdivisions: + * - 1 wavelet band per plane, size factor 1:1, code pattern: 3 + * - 4 wavelet bands per plane, size factor 1:4, code pattern: 2,3,3,3,3 + * Anything else is either unsupported or corrupt. + * + * @param[in,out] gb the GetBit context + * @return number of wavelet bands or 0 on error + */ +static int decode_plane_subdivision(GetBitContext *gb) +{ + int i; + + switch (get_bits(gb, 2)) { + case 3: + return 1; + case 2: + for (i = 0; i < 4; i++) + if (get_bits(gb, 2) != 3) + return 0; + return 4; + default: + return 0; + } +} + +static inline int scale_tile_size(int def_size, int size_factor) +{ + return (size_factor == 15 ? def_size : (size_factor + 1) << 5); +} + +/** + * Decode Indeo 4 picture header. + * + * @param[in,out] ctx pointer to the decoder context + * @param[in] avctx pointer to the AVCodecContext + * @return result code: 0 = OK, negative number = error + */ +static int decode_pic_hdr(IVI4DecContext *ctx, AVCodecContext *avctx) +{ + int pic_size_indx, val, i, p; + IVIPicConfig pic_conf; + + if (get_bits(&ctx->gb, 18) != 0x3FFF8) { + av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n"); + return AVERROR_INVALIDDATA; + } + + ctx->prev_frame_type = ctx->frame_type; + ctx->frame_type = get_bits(&ctx->gb, 3); + if (ctx->frame_type == 7) { + av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d\n", ctx->frame_type); + return AVERROR_INVALIDDATA; + } + +#if IVI4_STREAM_ANALYSER + if ( ctx->frame_type == FRAMETYPE_BIDIR1 + || ctx->frame_type == FRAMETYPE_BIDIR) + ctx->has_b_frames = 1; +#endif + + ctx->transp_status = get_bits1(&ctx->gb); +#if IVI4_STREAM_ANALYSER + if (ctx->transp_status) { + ctx->has_transp = 1; + } +#endif + + /* unknown bit: Mac decoder ignores this bit, XANIM returns error */ + if (get_bits1(&ctx->gb)) { + av_log(avctx, AV_LOG_ERROR, "Sync bit is set!\n"); + return AVERROR_INVALIDDATA; + } + + ctx->data_size = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 24) : 0; + + /* null frames don't contain anything else so we just return */ + if (ctx->frame_type >= FRAMETYPE_NULL_FIRST) { + av_dlog(avctx, "Null frame encountered!\n"); + return 0; + } + + /* Check key lock status. If enabled - ignore lock word. */ + /* Usually we have to prompt the user for the password, but */ + /* we don't do that because Indeo 4 videos can be decoded anyway */ + if (get_bits1(&ctx->gb)) { + skip_bits_long(&ctx->gb, 32); + av_dlog(avctx, "Password-protected clip!\n"); + } + + pic_size_indx = get_bits(&ctx->gb, 3); + if (pic_size_indx == IVI4_PIC_SIZE_ESC) { + pic_conf.pic_height = get_bits(&ctx->gb, 16); + pic_conf.pic_width = get_bits(&ctx->gb, 16); + } else { + pic_conf.pic_height = ivi4_common_pic_sizes[pic_size_indx * 2 + 1]; + pic_conf.pic_width = ivi4_common_pic_sizes[pic_size_indx * 2 ]; + } + + /* Decode tile dimensions. */ + if (get_bits1(&ctx->gb)) { + pic_conf.tile_height = scale_tile_size(pic_conf.pic_height, get_bits(&ctx->gb, 4)); + pic_conf.tile_width = scale_tile_size(pic_conf.pic_width, get_bits(&ctx->gb, 4)); +#if IVI4_STREAM_ANALYSER + ctx->uses_tiling = 1; +#endif + } else { + pic_conf.tile_height = pic_conf.pic_height; + pic_conf.tile_width = pic_conf.pic_width; + } + + /* Decode chroma subsampling. We support only 4:4 aka YVU9. */ + if (get_bits(&ctx->gb, 2)) { + av_log(avctx, AV_LOG_ERROR, "Only YVU9 picture format is supported!\n"); + return AVERROR_INVALIDDATA; + } + pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2; + pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2; + + /* decode subdivision of the planes */ + pic_conf.luma_bands = decode_plane_subdivision(&ctx->gb); + if (pic_conf.luma_bands) + pic_conf.chroma_bands = decode_plane_subdivision(&ctx->gb); + ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1; + if (ctx->is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) { + av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n", + pic_conf.luma_bands, pic_conf.chroma_bands); + return AVERROR_INVALIDDATA; + } + + /* check if picture layout was changed and reallocate buffers */ + if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) { + if (ff_ivi_init_planes(ctx->planes, &pic_conf)) { + av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n"); + return AVERROR(ENOMEM); + } + + ctx->pic_conf = pic_conf; + + /* set default macroblock/block dimensions */ + for (p = 0; p <= 2; p++) { + for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) { + ctx->planes[p].bands[i].mb_size = !p ? (!ctx->is_scalable ? 16 : 8) : 4; + ctx->planes[p].bands[i].blk_size = !p ? 8 : 4; + } + } + + if (ff_ivi_init_tiles(ctx->planes, ctx->pic_conf.tile_width, + ctx->pic_conf.tile_height)) { + av_log(avctx, AV_LOG_ERROR, + "Couldn't reallocate internal structures!\n"); + return AVERROR(ENOMEM); + } + } + + ctx->frame_num = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 20) : 0; + + /* skip decTimeEst field if present */ + if (get_bits1(&ctx->gb)) + skip_bits(&ctx->gb, 8); + + /* decode macroblock and block huffman codebooks */ + if (ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_MB_HUFF, &ctx->mb_vlc, avctx) || + ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_BLK_HUFF, &ctx->blk_vlc, avctx)) + return AVERROR_INVALIDDATA; + + ctx->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8; + + ctx->in_imf = get_bits1(&ctx->gb); + ctx->in_q = get_bits1(&ctx->gb); + + ctx->pic_glob_quant = get_bits(&ctx->gb, 5); + + /* TODO: ignore this parameter if unused */ + ctx->unknown1 = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 0; + + ctx->checksum = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 16) : 0; + + /* skip picture header extension if any */ + while (get_bits1(&ctx->gb)) { + av_dlog(avctx, "Pic hdr extension encountered!\n"); + val = get_bits(&ctx->gb, 8); + } + + if (get_bits1(&ctx->gb)) { + av_log(avctx, AV_LOG_ERROR, "Bad blocks bits encountered!\n"); + } + + align_get_bits(&ctx->gb); + + return 0; +} + + +/** + * Decode Indeo 4 band header. + * + * @param[in,out] ctx pointer to the decoder context + * @param[in,out] band pointer to the band descriptor + * @param[in] avctx pointer to the AVCodecContext + * @return result code: 0 = OK, negative number = error + */ +static int decode_band_hdr(IVI4DecContext *ctx, IVIBandDesc *band, + AVCodecContext *avctx) +{ + int plane, band_num, hdr_size, indx, transform_id, scan_indx; + int i; + + plane = get_bits(&ctx->gb, 2); + band_num = get_bits(&ctx->gb, 4); + if (band->plane != plane || band->band_num != band_num) { + av_log(avctx, AV_LOG_ERROR, "Invalid band header sequence!\n"); + return AVERROR_INVALIDDATA; + } + + band->is_empty = get_bits1(&ctx->gb); + if (!band->is_empty) { + hdr_size = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 16) : 4; + + band->is_halfpel = get_bits(&ctx->gb, 2); + if (band->is_halfpel >= 2) { + av_log(avctx, AV_LOG_ERROR, "Invalid/unsupported mv resolution: %d!\n", + band->is_halfpel); + return AVERROR_INVALIDDATA; + } +#if IVI4_STREAM_ANALYSER + if (!band->is_halfpel) + ctx->uses_fullpel = 1; +#endif + + band->checksum_present = get_bits1(&ctx->gb); + if (band->checksum_present) + band->checksum = get_bits(&ctx->gb, 16); + + indx = get_bits(&ctx->gb, 2); + if (indx == 3) { + av_log(avctx, AV_LOG_ERROR, "Invalid block size!\n"); + return AVERROR_INVALIDDATA; + } + band->mb_size = 16 >> indx; + band->blk_size = 8 >> (indx >> 1); + + band->inherit_mv = get_bits1(&ctx->gb); + band->inherit_qdelta = get_bits1(&ctx->gb); + + band->glob_quant = get_bits(&ctx->gb, 5); + + if (!get_bits1(&ctx->gb) || ctx->frame_type == FRAMETYPE_INTRA) { + transform_id = get_bits(&ctx->gb, 5); + if (!transforms[transform_id].inv_trans) { + av_log_ask_for_sample(avctx, "Unimplemented transform: %d!\n", transform_id); + return AVERROR_PATCHWELCOME; + } + if ((transform_id >= 7 && transform_id <= 9) || + transform_id == 17) { + av_log_ask_for_sample(avctx, "DCT transform not supported yet!\n"); + return AVERROR_PATCHWELCOME; + } + +#if IVI4_STREAM_ANALYSER + if ((transform_id >= 0 && transform_id <= 2) || transform_id == 10) + ctx->uses_haar = 1; +#endif + + band->inv_transform = transforms[transform_id].inv_trans; + band->dc_transform = transforms[transform_id].dc_trans; + band->is_2d_trans = transforms[transform_id].is_2d_trans; + + scan_indx = get_bits(&ctx->gb, 4); + if (scan_indx == 15) { + av_log(avctx, AV_LOG_ERROR, "Custom scan pattern encountered!\n"); + return AVERROR_INVALIDDATA; + } + band->scan = scan_index_to_tab[scan_indx]; + + band->quant_mat = get_bits(&ctx->gb, 5); + if (band->quant_mat == 31) { + av_log(avctx, AV_LOG_ERROR, "Custom quant matrix encountered!\n"); + return AVERROR_INVALIDDATA; + } + } + + /* decode block huffman codebook */ + if (ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_BLK_HUFF, + &band->blk_vlc, avctx)) + return AVERROR_INVALIDDATA; + + /* select appropriate rvmap table for this band */ + band->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8; + + /* decode rvmap probability corrections if any */ + band->num_corr = 0; /* there is no corrections */ + if (get_bits1(&ctx->gb)) { + band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */ + if (band->num_corr > 61) { + av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n", + band->num_corr); + return AVERROR_INVALIDDATA; + } + + /* read correction pairs */ + for (i = 0; i < band->num_corr * 2; i++) + band->corr[i] = get_bits(&ctx->gb, 8); + } + } + + if (band->blk_size == 8) { + band->intra_base = &ivi4_quant_8x8_intra[quant_index_to_tab[band->quant_mat]][0]; + band->inter_base = &ivi4_quant_8x8_inter[quant_index_to_tab[band->quant_mat]][0]; + } else { + band->intra_base = &ivi4_quant_4x4_intra[quant_index_to_tab[band->quant_mat]][0]; + band->inter_base = &ivi4_quant_4x4_inter[quant_index_to_tab[band->quant_mat]][0]; + } + + /* Indeo 4 doesn't use scale tables */ + band->intra_scale = NULL; + band->inter_scale = NULL; + + align_get_bits(&ctx->gb); + + return 0; +} + + +/** + * Decode information (block type, cbp, quant delta, motion vector) + * for all macroblocks in the current tile. + * + * @param[in,out] ctx pointer to the decoder context + * @param[in,out] band pointer to the band descriptor + * @param[in,out] tile pointer to the tile descriptor + * @param[in] avctx pointer to the AVCodecContext + * @return result code: 0 = OK, negative number = error + */ +static int decode_mb_info(IVI4DecContext *ctx, IVIBandDesc *band, + IVITile *tile, AVCodecContext *avctx) +{ + int x, y, mv_x, mv_y, mv_delta, offs, mb_offset, blks_per_mb, + mv_scale, mb_type_bits; + IVIMbInfo *mb, *ref_mb; + int row_offset = band->mb_size * band->pitch; + + mb = tile->mbs; + ref_mb = tile->ref_mbs; + offs = tile->ypos * band->pitch + tile->xpos; + + blks_per_mb = band->mb_size != band->blk_size ? 4 : 1; + mb_type_bits = ctx->frame_type == FRAMETYPE_BIDIR ? 2 : 1; + + /* scale factor for motion vectors */ + mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3); + mv_x = mv_y = 0; + + for (y = tile->ypos; y < tile->ypos + tile->height; y += band->mb_size) { + mb_offset = offs; + + for (x = tile->xpos; x < tile->xpos + tile->width; x += band->mb_size) { + mb->xpos = x; + mb->ypos = y; + mb->buf_offs = mb_offset; + + if (get_bits1(&ctx->gb)) { + if (ctx->frame_type == FRAMETYPE_INTRA) { + av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n"); + return AVERROR_INVALIDDATA; + } + mb->type = 1; /* empty macroblocks are always INTER */ + mb->cbp = 0; /* all blocks are empty */ + + mb->q_delta = 0; + if (!band->plane && !band->band_num && ctx->in_q) { + mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, + IVI_VLC_BITS, 1); + mb->q_delta = IVI_TOSIGNED(mb->q_delta); + } + + mb->mv_x = mb->mv_y = 0; /* no motion vector coded */ + if (band->inherit_mv) { + /* motion vector inheritance */ + if (mv_scale) { + mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); + mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); + } else { + mb->mv_x = ref_mb->mv_x; + mb->mv_y = ref_mb->mv_y; + } + } + } else { + if (band->inherit_mv) { + mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */ + } else if (ctx->frame_type == FRAMETYPE_INTRA) { + mb->type = 0; /* mb_type is always INTRA for intra-frames */ + } else { + mb->type = get_bits(&ctx->gb, mb_type_bits); + } + + mb->cbp = get_bits(&ctx->gb, blks_per_mb); + + mb->q_delta = 0; + if (band->inherit_qdelta) { + if (ref_mb) mb->q_delta = ref_mb->q_delta; + } else if (mb->cbp || (!band->plane && !band->band_num && + ctx->in_q)) { + mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, + IVI_VLC_BITS, 1); + mb->q_delta = IVI_TOSIGNED(mb->q_delta); + } + + if (!mb->type) { + mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */ + } else { + if (band->inherit_mv) { + /* motion vector inheritance */ + if (mv_scale) { + mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); + mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); + } else { + mb->mv_x = ref_mb->mv_x; + mb->mv_y = ref_mb->mv_y; + } + } else { + /* decode motion vector deltas */ + mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, + IVI_VLC_BITS, 1); + mv_y += IVI_TOSIGNED(mv_delta); + mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, + IVI_VLC_BITS, 1); + mv_x += IVI_TOSIGNED(mv_delta); + mb->mv_x = mv_x; + mb->mv_y = mv_y; + } + } + } + + mb++; + if (ref_mb) + ref_mb++; + mb_offset += band->mb_size; + } + + offs += row_offset; + } + + align_get_bits(&ctx->gb); + + return 0; +} + + +/** + * Decode an Indeo 4 band. + * + * @param[in,out] ctx pointer to the decoder context + * @param[in,out] band pointer to the band descriptor + * @param[in] avctx pointer to the AVCodecContext + * @return result code: 0 = OK, negative number = error + */ +static int decode_band(IVI4DecContext *ctx, int plane_num, + IVIBandDesc *band, AVCodecContext *avctx) +{ + int result, i, t, pos, idx1, idx2; + IVITile *tile; + + band->buf = band->bufs[ctx->dst_buf]; + band->ref_buf = band->bufs[ctx->ref_buf]; + + result = decode_band_hdr(ctx, band, avctx); + if (result) { + av_log(avctx, AV_LOG_ERROR, "Error decoding band header\n"); + return result; + } + + if (band->is_empty) { + av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n"); + return AVERROR_INVALIDDATA; + } + + band->rv_map = &ctx->rvmap_tabs[band->rvmap_sel]; + + /* apply corrections to the selected rvmap table if present */ + for (i = 0; i < band->num_corr; i++) { + idx1 = band->corr[i * 2]; + idx2 = band->corr[i * 2 + 1]; + FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]); + FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]); + } + + pos = get_bits_count(&ctx->gb); + + for (t = 0; t < band->num_tiles; t++) { + tile = &band->tiles[t]; + + tile->is_empty = get_bits1(&ctx->gb); + if (tile->is_empty) { + ff_ivi_process_empty_tile(avctx, band, tile, + (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3)); + av_dlog(avctx, "Empty tile encountered!\n"); + } else { + tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb); + if (!tile->data_size) { + av_log(avctx, AV_LOG_ERROR, "Tile data size is zero!\n"); + return AVERROR_INVALIDDATA; + } + + result = decode_mb_info(ctx, band, tile, avctx); + if (result < 0) + break; + + result = ff_ivi_decode_blocks(&ctx->gb, band, tile); + if (result < 0 || ((get_bits_count(&ctx->gb) - pos) >> 3) != tile->data_size) { + av_log(avctx, AV_LOG_ERROR, "Corrupted tile data encountered!\n"); + break; + } + + pos += tile->data_size << 3; // skip to next tile + } + } + + /* restore the selected rvmap table by applying its corrections in reverse order */ + for (i = band->num_corr - 1; i >= 0; i--) { + idx1 = band->corr[i * 2]; + idx2 = band->corr[i * 2 + 1]; + FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]); + FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]); + } + +#if defined(DEBUG) && IVI4_DEBUG_CHECKSUM + if (band->checksum_present) { + uint16_t chksum = ivi_calc_band_checksum(band); + if (chksum != band->checksum) { + av_log(avctx, AV_LOG_ERROR, + "Band checksum mismatch! Plane %d, band %d, received: %x, calculated: %x\n", + band->plane, band->band_num, band->checksum, chksum); + } + } +#endif + + align_get_bits(&ctx->gb); + + return 0; +} + + +static av_cold int decode_init(AVCodecContext *avctx) +{ + IVI4DecContext *ctx = avctx->priv_data; + + ff_ivi_init_static_vlc(); + + /* copy rvmap tables in our context so we can apply changes to them */ + memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs)); + + /* Force allocation of the internal buffers */ + /* during picture header decoding. */ + ctx->pic_conf.pic_width = 0; + ctx->pic_conf.pic_height = 0; + + avctx->pix_fmt = PIX_FMT_YUV410P; + + return 0; +} + + +/** + * Rearrange decoding and reference buffers. + * + * @param[in,out] ctx pointer to the decoder context + */ +static void switch_buffers(IVI4DecContext *ctx) +{ + switch (ctx->prev_frame_type) { + case FRAMETYPE_INTRA: + case FRAMETYPE_INTER: + ctx->buf_switch ^= 1; + ctx->dst_buf = ctx->buf_switch; + ctx->ref_buf = ctx->buf_switch ^ 1; + break; + case FRAMETYPE_INTER_NOREF: + break; + } + + switch (ctx->frame_type) { + case FRAMETYPE_INTRA: + ctx->buf_switch = 0; + /* FALLTHROUGH */ + case FRAMETYPE_INTER: + ctx->dst_buf = ctx->buf_switch; + ctx->ref_buf = ctx->buf_switch ^ 1; + break; + case FRAMETYPE_INTER_NOREF: + case FRAMETYPE_NULL_FIRST: + case FRAMETYPE_NULL_LAST: + break; + } +} + + +static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, + AVPacket *avpkt) +{ + IVI4DecContext *ctx = avctx->priv_data; + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + int result, p, b; + + init_get_bits(&ctx->gb, buf, buf_size * 8); + + result = decode_pic_hdr(ctx, avctx); + if (result) { + av_log(avctx, AV_LOG_ERROR, "Error decoding picture header\n"); + return result; + } + + switch_buffers(ctx); + + if (ctx->frame_type < FRAMETYPE_NULL_FIRST) { + for (p = 0; p < 3; p++) { + for (b = 0; b < ctx->planes[p].num_bands; b++) { + result = decode_band(ctx, p, &ctx->planes[p].bands[b], avctx); + if (result) { + av_log(avctx, AV_LOG_ERROR, + "Error decoding band: %d, plane: %d\n", b, p); + return result; + } + } + } + } + + /* If the bidirectional mode is enabled, next I and the following P frame will */ + /* be sent together. Unfortunately the approach below seems to be the only way */ + /* to handle the B-frames mode. That's exactly the same Intel decoders do. */ + if (ctx->frame_type == FRAMETYPE_INTRA) { + while (get_bits(&ctx->gb, 8)); // skip version string + skip_bits_long(&ctx->gb, 64); // skip padding, TODO: implement correct 8-bytes alignment + if (get_bits_left(&ctx->gb) > 18 && show_bits(&ctx->gb, 18) == 0x3FFF8) + av_log(avctx, AV_LOG_ERROR, "Buffer contains IP frames!\n"); + } + + if (ctx->frame.data[0]) + avctx->release_buffer(avctx, &ctx->frame); + + ctx->frame.reference = 0; + if ((result = avctx->get_buffer(avctx, &ctx->frame)) < 0) { + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + return result; + } + + if (ctx->is_scalable) { + ff_ivi_recompose_haar(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0], 4); + } else { + ff_ivi_output_plane(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]); + } + + ff_ivi_output_plane(&ctx->planes[2], ctx->frame.data[1], ctx->frame.linesize[1]); + ff_ivi_output_plane(&ctx->planes[1], ctx->frame.data[2], ctx->frame.linesize[2]); + + *data_size = sizeof(AVFrame); + *(AVFrame*)data = ctx->frame; + + return buf_size; +} + + +static av_cold int decode_close(AVCodecContext *avctx) +{ + IVI4DecContext *ctx = avctx->priv_data; + + ff_ivi_free_buffers(&ctx->planes[0]); + + if (ctx->frame.data[0]) + avctx->release_buffer(avctx, &ctx->frame); + +#if IVI4_STREAM_ANALYSER + if (ctx->is_scalable) + av_log(avctx, AV_LOG_ERROR, "This video uses scalability mode!\n"); + if (ctx->uses_tiling) + av_log(avctx, AV_LOG_ERROR, "This video uses local decoding!\n"); + if (ctx->has_b_frames) + av_log(avctx, AV_LOG_ERROR, "This video contains B-frames!\n"); + if (ctx->has_transp) + av_log(avctx, AV_LOG_ERROR, "Transparency mode is enabled!\n"); + if (ctx->uses_haar) + av_log(avctx, AV_LOG_ERROR, "This video uses Haar transform!\n"); + if (ctx->uses_fullpel) + av_log(avctx, AV_LOG_ERROR, "This video uses fullpel motion vectors!\n"); +#endif + + return 0; +} + + +AVCodec ff_indeo4_decoder = { + .name = "indeo4", + .type = AVMEDIA_TYPE_VIDEO, + .id = CODEC_ID_INDEO4, + .priv_data_size = sizeof(IVI4DecContext), + .init = decode_init, + .close = decode_close, + .decode = decode_frame, + .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 4"), +}; -- cgit v1.2.3