| /* |
| * Indeo Video Interactive v5 compatible decoder |
| * Copyright (c) 2009 Maxim Poliakovski |
| * |
| * 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 |
| */ |
| |
| /** |
| * @file |
| * Indeo Video Interactive version 5 decoder |
| * |
| * Indeo5 data is usually transported within .avi or .mov files. |
| * Known FOURCCs: 'IV50' |
| */ |
| |
| #define BITSTREAM_READER_LE |
| #include "avcodec.h" |
| #include "get_bits.h" |
| #include "ivi.h" |
| #include "ivi_dsp.h" |
| #include "indeo5data.h" |
| |
| /** |
| * Indeo5 frame types. |
| */ |
| enum { |
| FRAMETYPE_INTRA = 0, |
| FRAMETYPE_INTER = 1, ///< non-droppable P-frame |
| FRAMETYPE_INTER_SCAL = 2, ///< droppable P-frame used in the scalability mode |
| FRAMETYPE_INTER_NOREF = 3, ///< droppable P-frame |
| FRAMETYPE_NULL = 4 ///< empty frame with no data |
| }; |
| |
| #define IVI5_PIC_SIZE_ESC 15 |
| |
| /** |
| * Decode Indeo5 GOP (Group of pictures) header. |
| * This header is present in key frames only. |
| * It defines parameters for all frames in a GOP. |
| * |
| * @param[in,out] ctx ptr to the decoder context |
| * @param[in] avctx ptr to the AVCodecContext |
| * @return result code: 0 = OK, -1 = error |
| */ |
| static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx) |
| { |
| int result, i, p, tile_size, pic_size_indx, mb_size, blk_size, is_scalable; |
| int quant_mat, blk_size_changed = 0; |
| IVIBandDesc *band, *band1, *band2; |
| IVIPicConfig pic_conf; |
| |
| ctx->gop_flags = get_bits(&ctx->gb, 8); |
| |
| ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0; |
| |
| if (ctx->gop_flags & IVI5_IS_PROTECTED) |
| ctx->lock_word = get_bits_long(&ctx->gb, 32); |
| |
| tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0; |
| if (tile_size > 256) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid tile size: %d\n", tile_size); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| /* decode number of wavelet bands */ |
| /* num_levels * 3 + 1 */ |
| pic_conf.luma_bands = get_bits(&ctx->gb, 2) * 3 + 1; |
| pic_conf.chroma_bands = get_bits1(&ctx->gb) * 3 + 1; |
| is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1; |
| if (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; |
| } |
| |
| pic_size_indx = get_bits(&ctx->gb, 4); |
| if (pic_size_indx == IVI5_PIC_SIZE_ESC) { |
| pic_conf.pic_height = get_bits(&ctx->gb, 13); |
| pic_conf.pic_width = get_bits(&ctx->gb, 13); |
| } else { |
| pic_conf.pic_height = ivi5_common_pic_sizes[pic_size_indx * 2 + 1] << 2; |
| pic_conf.pic_width = ivi5_common_pic_sizes[pic_size_indx * 2 ] << 2; |
| } |
| |
| if (ctx->gop_flags & 2) { |
| avpriv_report_missing_feature(avctx, "YV12 picture format"); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2; |
| pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2; |
| |
| if (!tile_size) { |
| pic_conf.tile_height = pic_conf.pic_height; |
| pic_conf.tile_width = pic_conf.pic_width; |
| } else { |
| pic_conf.tile_height = pic_conf.tile_width = tile_size; |
| } |
| |
| /* check if picture layout was changed and reallocate buffers */ |
| if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf) || ctx->gop_invalid) { |
| result = ff_ivi_init_planes(ctx->planes, &pic_conf, 0); |
| if (result < 0) { |
| av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n"); |
| return result; |
| } |
| ctx->pic_conf = pic_conf; |
| ctx->is_scalable = is_scalable; |
| blk_size_changed = 1; /* force reallocation of the internal structures */ |
| } |
| |
| for (p = 0; p <= 1; p++) { |
| for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) { |
| band = &ctx->planes[p].bands[i]; |
| |
| band->is_halfpel = get_bits1(&ctx->gb); |
| |
| mb_size = get_bits1(&ctx->gb); |
| blk_size = 8 >> get_bits1(&ctx->gb); |
| mb_size = blk_size << !mb_size; |
| |
| if (p==0 && blk_size==4) { |
| av_log(avctx, AV_LOG_ERROR, "4x4 luma blocks are unsupported!\n"); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size; |
| if (blk_size_changed) { |
| band->mb_size = mb_size; |
| band->blk_size = blk_size; |
| } |
| |
| if (get_bits1(&ctx->gb)) { |
| avpriv_report_missing_feature(avctx, "Extended transform info"); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| /* select transform function and scan pattern according to plane and band number */ |
| switch ((p << 2) + i) { |
| case 0: |
| band->inv_transform = ff_ivi_inverse_slant_8x8; |
| band->dc_transform = ff_ivi_dc_slant_2d; |
| band->scan = ff_zigzag_direct; |
| band->transform_size = 8; |
| break; |
| |
| case 1: |
| band->inv_transform = ff_ivi_row_slant8; |
| band->dc_transform = ff_ivi_dc_row_slant; |
| band->scan = ff_ivi_vertical_scan_8x8; |
| band->transform_size = 8; |
| break; |
| |
| case 2: |
| band->inv_transform = ff_ivi_col_slant8; |
| band->dc_transform = ff_ivi_dc_col_slant; |
| band->scan = ff_ivi_horizontal_scan_8x8; |
| band->transform_size = 8; |
| break; |
| |
| case 3: |
| band->inv_transform = ff_ivi_put_pixels_8x8; |
| band->dc_transform = ff_ivi_put_dc_pixel_8x8; |
| band->scan = ff_ivi_horizontal_scan_8x8; |
| band->transform_size = 8; |
| break; |
| |
| case 4: |
| band->inv_transform = ff_ivi_inverse_slant_4x4; |
| band->dc_transform = ff_ivi_dc_slant_2d; |
| band->scan = ff_ivi_direct_scan_4x4; |
| band->transform_size = 4; |
| break; |
| } |
| |
| band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 || |
| band->inv_transform == ff_ivi_inverse_slant_4x4; |
| |
| if (band->transform_size != band->blk_size) { |
| av_log(avctx, AV_LOG_ERROR, "transform and block size mismatch (%d != %d)\n", band->transform_size, band->blk_size); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| /* select dequant matrix according to plane and band number */ |
| if (!p) { |
| quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0; |
| } else { |
| quant_mat = 5; |
| } |
| |
| if (band->blk_size == 8) { |
| if(quant_mat >= 5){ |
| av_log(avctx, AV_LOG_ERROR, "quant_mat %d too large!\n", quant_mat); |
| return -1; |
| } |
| band->intra_base = &ivi5_base_quant_8x8_intra[quant_mat][0]; |
| band->inter_base = &ivi5_base_quant_8x8_inter[quant_mat][0]; |
| band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0]; |
| band->inter_scale = &ivi5_scale_quant_8x8_inter[quant_mat][0]; |
| } else { |
| band->intra_base = ivi5_base_quant_4x4_intra; |
| band->inter_base = ivi5_base_quant_4x4_inter; |
| band->intra_scale = ivi5_scale_quant_4x4_intra; |
| band->inter_scale = ivi5_scale_quant_4x4_inter; |
| } |
| |
| if (get_bits(&ctx->gb, 2)) { |
| av_log(avctx, AV_LOG_ERROR, "End marker missing!\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| } |
| |
| /* copy chroma parameters into the 2nd chroma plane */ |
| for (i = 0; i < pic_conf.chroma_bands; i++) { |
| band1 = &ctx->planes[1].bands[i]; |
| band2 = &ctx->planes[2].bands[i]; |
| |
| band2->width = band1->width; |
| band2->height = band1->height; |
| band2->mb_size = band1->mb_size; |
| band2->blk_size = band1->blk_size; |
| band2->is_halfpel = band1->is_halfpel; |
| band2->intra_base = band1->intra_base; |
| band2->inter_base = band1->inter_base; |
| band2->intra_scale = band1->intra_scale; |
| band2->inter_scale = band1->inter_scale; |
| band2->scan = band1->scan; |
| band2->inv_transform = band1->inv_transform; |
| band2->dc_transform = band1->dc_transform; |
| band2->is_2d_trans = band1->is_2d_trans; |
| band2->transform_size= band1->transform_size; |
| } |
| |
| /* reallocate internal structures if needed */ |
| if (blk_size_changed) { |
| result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width, |
| pic_conf.tile_height); |
| if (result < 0) { |
| av_log(avctx, AV_LOG_ERROR, |
| "Couldn't reallocate internal structures!\n"); |
| return result; |
| } |
| } |
| |
| if (ctx->gop_flags & 8) { |
| if (get_bits(&ctx->gb, 3)) { |
| av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (get_bits1(&ctx->gb)) |
| skip_bits_long(&ctx->gb, 24); /* skip transparency fill color */ |
| } |
| |
| align_get_bits(&ctx->gb); |
| |
| skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */ |
| |
| /* skip GOP extension if any */ |
| if (get_bits1(&ctx->gb)) { |
| do { |
| i = get_bits(&ctx->gb, 16); |
| } while (i & 0x8000); |
| } |
| |
| align_get_bits(&ctx->gb); |
| |
| return 0; |
| } |
| |
| |
| /** |
| * Skip a header extension. |
| * |
| * @param[in,out] gb the GetBit context |
| */ |
| static inline int skip_hdr_extension(GetBitContext *gb) |
| { |
| int i, len; |
| |
| do { |
| len = get_bits(gb, 8); |
| if (8*len > get_bits_left(gb)) |
| return AVERROR_INVALIDDATA; |
| for (i = 0; i < len; i++) skip_bits(gb, 8); |
| } while(len); |
| |
| return 0; |
| } |
| |
| |
| /** |
| * Decode Indeo5 picture header. |
| * |
| * @param[in,out] ctx ptr to the decoder context |
| * @param[in] avctx ptr to the AVCodecContext |
| * @return result code: 0 = OK, -1 = error |
| */ |
| static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx) |
| { |
| int ret; |
| |
| if (get_bits(&ctx->gb, 5) != 0x1F) { |
| 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 >= 5) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| ctx->frame_num = get_bits(&ctx->gb, 8); |
| |
| if (ctx->frame_type == FRAMETYPE_INTRA) { |
| if ((ret = decode_gop_header(ctx, avctx)) < 0) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid GOP header, skipping frames.\n"); |
| ctx->gop_invalid = 1; |
| return ret; |
| } |
| ctx->gop_invalid = 0; |
| } |
| |
| if (ctx->frame_type == FRAMETYPE_INTER_SCAL && !ctx->is_scalable) { |
| av_log(avctx, AV_LOG_ERROR, "Scalable inter frame in non scalable stream\n"); |
| ctx->frame_type = FRAMETYPE_INTER; |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (ctx->frame_type != FRAMETYPE_NULL) { |
| ctx->frame_flags = get_bits(&ctx->gb, 8); |
| |
| ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits_long(&ctx->gb, 24) : 0; |
| |
| ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0; |
| |
| /* skip unknown extension if any */ |
| if (ctx->frame_flags & 0x20) |
| skip_hdr_extension(&ctx->gb); /* XXX: untested */ |
| |
| /* decode macroblock huffman codebook */ |
| ret = ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40, |
| IVI_MB_HUFF, &ctx->mb_vlc, avctx); |
| if (ret < 0) |
| return ret; |
| |
| skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */ |
| } |
| |
| align_get_bits(&ctx->gb); |
| |
| return 0; |
| } |
| |
| |
| /** |
| * Decode Indeo5 band header. |
| * |
| * @param[in,out] ctx ptr to the decoder context |
| * @param[in,out] band ptr to the band descriptor |
| * @param[in] avctx ptr to the AVCodecContext |
| * @return result code: 0 = OK, -1 = error |
| */ |
| static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band, |
| AVCodecContext *avctx) |
| { |
| int i, ret; |
| uint8_t band_flags; |
| |
| band_flags = get_bits(&ctx->gb, 8); |
| |
| if (band_flags & 1) { |
| band->is_empty = 1; |
| return 0; |
| } |
| |
| band->data_size = (ctx->frame_flags & 0x80) ? get_bits_long(&ctx->gb, 24) : 0; |
| |
| band->inherit_mv = band_flags & 2; |
| band->inherit_qdelta = band_flags & 8; |
| band->qdelta_present = band_flags & 4; |
| if (!band->qdelta_present) band->inherit_qdelta = 1; |
| |
| /* decode rvmap probability corrections if any */ |
| band->num_corr = 0; /* there are no corrections */ |
| if (band_flags & 0x10) { |
| 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); |
| } |
| |
| /* select appropriate rvmap table for this band */ |
| band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8; |
| |
| /* decode block huffman codebook */ |
| ret = ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF, |
| &band->blk_vlc, avctx); |
| if (ret < 0) |
| return ret; |
| |
| band->checksum_present = get_bits1(&ctx->gb); |
| if (band->checksum_present) |
| band->checksum = get_bits(&ctx->gb, 16); |
| |
| band->glob_quant = get_bits(&ctx->gb, 5); |
| |
| /* skip unknown extension if any */ |
| if (band_flags & 0x20) { /* XXX: untested */ |
| align_get_bits(&ctx->gb); |
| skip_hdr_extension(&ctx->gb); |
| } |
| |
| align_get_bits(&ctx->gb); |
| |
| return 0; |
| } |
| |
| |
| /** |
| * Decode info (block type, cbp, quant delta, motion vector) |
| * for all macroblocks in the current tile. |
| * |
| * @param[in,out] ctx ptr to the decoder context |
| * @param[in,out] band ptr to the band descriptor |
| * @param[in,out] tile ptr to the tile descriptor |
| * @param[in] avctx ptr to the AVCodecContext |
| * @return result code: 0 = OK, -1 = error |
| */ |
| static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band, |
| IVITile *tile, AVCodecContext *avctx) |
| { |
| int x, y, mv_x, mv_y, mv_delta, offs, mb_offset, |
| mv_scale, blks_per_mb, s; |
| 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; |
| |
| if (!ref_mb && |
| ((band->qdelta_present && band->inherit_qdelta) || band->inherit_mv)) |
| return AVERROR_INVALIDDATA; |
| |
| if (tile->num_MBs != IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)) { |
| av_log(avctx, AV_LOG_ERROR, "Allocated tile size %d mismatches parameters %d\n", |
| tile->num_MBs, IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| /* 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->frame_flags & 8)) { |
| 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 && ref_mb){ |
| /* 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 && ref_mb) { |
| 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_bits1(&ctx->gb); |
| } |
| |
| blks_per_mb = band->mb_size != band->blk_size ? 4 : 1; |
| mb->cbp = get_bits(&ctx->gb, blks_per_mb); |
| |
| mb->q_delta = 0; |
| if (band->qdelta_present) { |
| if (band->inherit_qdelta) { |
| if (ref_mb) mb->q_delta = ref_mb->q_delta; |
| } else if (mb->cbp || (!band->plane && !band->band_num && |
| (ctx->frame_flags & 8))) { |
| 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 && ref_mb){ |
| /* 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; |
| } |
| } |
| } |
| |
| s= band->is_halfpel; |
| if (mb->type) |
| if ( x + (mb->mv_x >>s) + (y+ (mb->mv_y >>s))*band->pitch < 0 || |
| x + ((mb->mv_x+s)>>s) + band->mb_size - 1 |
| + (y+band->mb_size - 1 +((mb->mv_y+s)>>s))*band->pitch > band->bufsize - 1) { |
| av_log(avctx, AV_LOG_ERROR, "motion vector %d %d outside reference\n", x*s + mb->mv_x, y*s + mb->mv_y); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| mb++; |
| if (ref_mb) |
| ref_mb++; |
| mb_offset += band->mb_size; |
| } |
| |
| offs += row_offset; |
| } |
| |
| align_get_bits(&ctx->gb); |
| |
| return 0; |
| } |
| |
| |
| /** |
| * Switch buffers. |
| * |
| * @param[in,out] ctx ptr to the decoder context |
| */ |
| static void switch_buffers(IVI45DecContext *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_SCAL: |
| if (!ctx->inter_scal) { |
| ctx->ref2_buf = 2; |
| ctx->inter_scal = 1; |
| } |
| FFSWAP(int, ctx->dst_buf, ctx->ref2_buf); |
| ctx->ref_buf = ctx->ref2_buf; |
| break; |
| case FRAMETYPE_INTER_NOREF: |
| break; |
| } |
| |
| switch (ctx->frame_type) { |
| case FRAMETYPE_INTRA: |
| ctx->buf_switch = 0; |
| /* FALLTHROUGH */ |
| case FRAMETYPE_INTER: |
| ctx->inter_scal = 0; |
| ctx->dst_buf = ctx->buf_switch; |
| ctx->ref_buf = ctx->buf_switch ^ 1; |
| break; |
| case FRAMETYPE_INTER_SCAL: |
| case FRAMETYPE_INTER_NOREF: |
| case FRAMETYPE_NULL: |
| break; |
| } |
| } |
| |
| |
| static int is_nonnull_frame(IVI45DecContext *ctx) |
| { |
| return ctx->frame_type != FRAMETYPE_NULL; |
| } |
| |
| |
| /** |
| * Initialize Indeo5 decoder. |
| */ |
| static av_cold int decode_init(AVCodecContext *avctx) |
| { |
| IVI45DecContext *ctx = avctx->priv_data; |
| int result; |
| |
| 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)); |
| |
| /* set the initial picture layout according to the basic profile: |
| there is only one band per plane (no scalability), only one tile (no local decoding) |
| and picture format = YVU9 */ |
| ctx->pic_conf.pic_width = avctx->width; |
| ctx->pic_conf.pic_height = avctx->height; |
| ctx->pic_conf.chroma_width = (avctx->width + 3) >> 2; |
| ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2; |
| ctx->pic_conf.tile_width = avctx->width; |
| ctx->pic_conf.tile_height = avctx->height; |
| ctx->pic_conf.luma_bands = ctx->pic_conf.chroma_bands = 1; |
| |
| result = ff_ivi_init_planes(ctx->planes, &ctx->pic_conf, 0); |
| if (result) { |
| av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| ctx->buf_switch = 0; |
| ctx->inter_scal = 0; |
| |
| ctx->decode_pic_hdr = decode_pic_hdr; |
| ctx->decode_band_hdr = decode_band_hdr; |
| ctx->decode_mb_info = decode_mb_info; |
| ctx->switch_buffers = switch_buffers; |
| ctx->is_nonnull_frame = is_nonnull_frame; |
| |
| ctx->is_indeo4 = 0; |
| |
| avctx->pix_fmt = AV_PIX_FMT_YUV410P; |
| |
| return 0; |
| } |
| |
| AVCodec ff_indeo5_decoder = { |
| .name = "indeo5", |
| .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_INDEO5, |
| .priv_data_size = sizeof(IVI45DecContext), |
| .init = decode_init, |
| .close = ff_ivi_decode_close, |
| .decode = ff_ivi_decode_frame, |
| .capabilities = AV_CODEC_CAP_DR1, |
| }; |
