835 lines
27 KiB
C
835 lines
27 KiB
C
/*
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* Indeo Video Interactive v5 compatible decoder
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* Copyright (c) 2009 Maxim Poliakovski
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Indeo Video Interactive version 5 decoder
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*
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* Indeo5 data is usually transported within .avi or .mov files.
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* Known FOURCCs: 'IV50'
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*/
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#define BITSTREAM_READER_LE
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#include "avcodec.h"
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#include "get_bits.h"
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#include "dsputil.h"
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#include "ivi_dsp.h"
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#include "ivi_common.h"
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#include "indeo5data.h"
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/**
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* Indeo5 frame types.
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*/
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enum {
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FRAMETYPE_INTRA = 0,
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FRAMETYPE_INTER = 1, ///< non-droppable P-frame
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FRAMETYPE_INTER_SCAL = 2, ///< droppable P-frame used in the scalability mode
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FRAMETYPE_INTER_NOREF = 3, ///< droppable P-frame
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FRAMETYPE_NULL = 4 ///< empty frame with no data
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};
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#define IVI5_PIC_SIZE_ESC 15
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#define IVI5_IS_PROTECTED 0x20
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typedef struct {
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GetBitContext gb;
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AVFrame frame;
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RVMapDesc rvmap_tabs[9]; ///< local corrected copy of the static rvmap tables
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IVIPlaneDesc planes[3]; ///< color planes
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const uint8_t *frame_data; ///< input frame data pointer
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int buf_switch; ///< used to switch between three buffers
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int inter_scal; ///< signals a sequence of scalable inter frames
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int dst_buf; ///< buffer index for the currently decoded frame
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int ref_buf; ///< inter frame reference buffer index
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int ref2_buf; ///< temporal storage for switching buffers
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uint32_t frame_size; ///< frame size in bytes
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int frame_type;
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int prev_frame_type; ///< frame type of the previous frame
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int frame_num;
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uint32_t pic_hdr_size; ///< picture header size in bytes
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uint8_t frame_flags;
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uint16_t checksum; ///< frame checksum
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IVIHuffTab mb_vlc; ///< vlc table for decoding macroblock data
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uint16_t gop_hdr_size;
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uint8_t gop_flags;
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int is_scalable;
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uint32_t lock_word;
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IVIPicConfig pic_conf;
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} IVI5DecContext;
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/**
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* Decode Indeo5 GOP (Group of pictures) header.
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* This header is present in key frames only.
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* It defines parameters for all frames in a GOP.
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*
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* @param[in,out] ctx ptr to the decoder context
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* @param[in] avctx ptr to the AVCodecContext
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* @return result code: 0 = OK, -1 = error
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*/
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static int decode_gop_header(IVI5DecContext *ctx, AVCodecContext *avctx)
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{
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int result, i, p, tile_size, pic_size_indx, mb_size, blk_size;
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int quant_mat, blk_size_changed = 0;
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IVIBandDesc *band, *band1, *band2;
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IVIPicConfig pic_conf;
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ctx->gop_flags = get_bits(&ctx->gb, 8);
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ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0;
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if (ctx->gop_flags & IVI5_IS_PROTECTED)
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ctx->lock_word = get_bits_long(&ctx->gb, 32);
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tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0;
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if (tile_size > 256) {
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av_log(avctx, AV_LOG_ERROR, "Invalid tile size: %d\n", tile_size);
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return -1;
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}
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/* decode number of wavelet bands */
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/* num_levels * 3 + 1 */
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pic_conf.luma_bands = get_bits(&ctx->gb, 2) * 3 + 1;
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pic_conf.chroma_bands = get_bits1(&ctx->gb) * 3 + 1;
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ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
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if (ctx->is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) {
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av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n",
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pic_conf.luma_bands, pic_conf.chroma_bands);
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return -1;
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}
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pic_size_indx = get_bits(&ctx->gb, 4);
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if (pic_size_indx == IVI5_PIC_SIZE_ESC) {
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pic_conf.pic_height = get_bits(&ctx->gb, 13);
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pic_conf.pic_width = get_bits(&ctx->gb, 13);
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} else {
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pic_conf.pic_height = ivi5_common_pic_sizes[pic_size_indx * 2 + 1] << 2;
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pic_conf.pic_width = ivi5_common_pic_sizes[pic_size_indx * 2 ] << 2;
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}
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if (ctx->gop_flags & 2) {
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av_log(avctx, AV_LOG_ERROR, "YV12 picture format not supported!\n");
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return -1;
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}
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pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2;
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pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2;
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if (!tile_size) {
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pic_conf.tile_height = pic_conf.pic_height;
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pic_conf.tile_width = pic_conf.pic_width;
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} else {
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pic_conf.tile_height = pic_conf.tile_width = tile_size;
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}
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/* check if picture layout was changed and reallocate buffers */
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if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) {
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result = ff_ivi_init_planes(ctx->planes, &pic_conf);
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if (result) {
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av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n");
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return -1;
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}
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ctx->pic_conf = pic_conf;
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blk_size_changed = 1; /* force reallocation of the internal structures */
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}
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for (p = 0; p <= 1; p++) {
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for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) {
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band = &ctx->planes[p].bands[i];
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band->is_halfpel = get_bits1(&ctx->gb);
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mb_size = get_bits1(&ctx->gb);
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blk_size = 8 >> get_bits1(&ctx->gb);
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mb_size = blk_size << !mb_size;
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blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size;
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if (blk_size_changed) {
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band->mb_size = mb_size;
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band->blk_size = blk_size;
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}
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if (get_bits1(&ctx->gb)) {
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av_log(avctx, AV_LOG_ERROR, "Extended transform info encountered!\n");
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return -1;
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}
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/* select transform function and scan pattern according to plane and band number */
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switch ((p << 2) + i) {
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case 0:
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band->inv_transform = ff_ivi_inverse_slant_8x8;
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band->dc_transform = ff_ivi_dc_slant_2d;
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band->scan = ff_zigzag_direct;
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break;
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case 1:
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band->inv_transform = ff_ivi_row_slant8;
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band->dc_transform = ff_ivi_dc_row_slant;
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band->scan = ff_ivi_vertical_scan_8x8;
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break;
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case 2:
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band->inv_transform = ff_ivi_col_slant8;
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band->dc_transform = ff_ivi_dc_col_slant;
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band->scan = ff_ivi_horizontal_scan_8x8;
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break;
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case 3:
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band->inv_transform = ff_ivi_put_pixels_8x8;
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band->dc_transform = ff_ivi_put_dc_pixel_8x8;
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band->scan = ff_ivi_horizontal_scan_8x8;
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break;
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case 4:
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band->inv_transform = ff_ivi_inverse_slant_4x4;
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band->dc_transform = ff_ivi_dc_slant_2d;
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band->scan = ff_ivi_direct_scan_4x4;
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break;
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}
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band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 ||
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band->inv_transform == ff_ivi_inverse_slant_4x4;
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/* select dequant matrix according to plane and band number */
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if (!p) {
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quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0;
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} else {
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quant_mat = 5;
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}
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if (band->blk_size == 8) {
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band->intra_base = &ivi5_base_quant_8x8_intra[quant_mat][0];
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band->inter_base = &ivi5_base_quant_8x8_inter[quant_mat][0];
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band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0];
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band->inter_scale = &ivi5_scale_quant_8x8_inter[quant_mat][0];
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} else {
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band->intra_base = ivi5_base_quant_4x4_intra;
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band->inter_base = ivi5_base_quant_4x4_inter;
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band->intra_scale = ivi5_scale_quant_4x4_intra;
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band->inter_scale = ivi5_scale_quant_4x4_inter;
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}
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if (get_bits(&ctx->gb, 2)) {
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av_log(avctx, AV_LOG_ERROR, "End marker missing!\n");
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return -1;
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}
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}
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}
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/* copy chroma parameters into the 2nd chroma plane */
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for (i = 0; i < pic_conf.chroma_bands; i++) {
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band1 = &ctx->planes[1].bands[i];
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band2 = &ctx->planes[2].bands[i];
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band2->width = band1->width;
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band2->height = band1->height;
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band2->mb_size = band1->mb_size;
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band2->blk_size = band1->blk_size;
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band2->is_halfpel = band1->is_halfpel;
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band2->intra_base = band1->intra_base;
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band2->inter_base = band1->inter_base;
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band2->intra_scale = band1->intra_scale;
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band2->inter_scale = band1->inter_scale;
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band2->scan = band1->scan;
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band2->inv_transform = band1->inv_transform;
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band2->dc_transform = band1->dc_transform;
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band2->is_2d_trans = band1->is_2d_trans;
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}
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/* reallocate internal structures if needed */
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if (blk_size_changed) {
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result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width,
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pic_conf.tile_height);
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if (result) {
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av_log(avctx, AV_LOG_ERROR,
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"Couldn't reallocate internal structures!\n");
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return -1;
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}
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}
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if (ctx->gop_flags & 8) {
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if (get_bits(&ctx->gb, 3)) {
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av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n");
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return -1;
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}
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if (get_bits1(&ctx->gb))
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skip_bits_long(&ctx->gb, 24); /* skip transparency fill color */
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}
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align_get_bits(&ctx->gb);
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skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */
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/* skip GOP extension if any */
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if (get_bits1(&ctx->gb)) {
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do {
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i = get_bits(&ctx->gb, 16);
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} while (i & 0x8000);
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}
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align_get_bits(&ctx->gb);
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return 0;
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}
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/**
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* Skip a header extension.
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*
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* @param[in,out] gb the GetBit context
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*/
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static inline void skip_hdr_extension(GetBitContext *gb)
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{
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int i, len;
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do {
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len = get_bits(gb, 8);
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for (i = 0; i < len; i++) skip_bits(gb, 8);
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} while(len);
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}
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/**
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* Decode Indeo5 picture header.
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*
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* @param[in,out] ctx ptr to the decoder context
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* @param[in] avctx ptr to the AVCodecContext
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* @return result code: 0 = OK, -1 = error
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*/
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static int decode_pic_hdr(IVI5DecContext *ctx, AVCodecContext *avctx)
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{
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if (get_bits(&ctx->gb, 5) != 0x1F) {
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av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
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return -1;
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}
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ctx->prev_frame_type = ctx->frame_type;
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ctx->frame_type = get_bits(&ctx->gb, 3);
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if (ctx->frame_type >= 5) {
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av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type);
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return -1;
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}
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ctx->frame_num = get_bits(&ctx->gb, 8);
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if (ctx->frame_type == FRAMETYPE_INTRA) {
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if (decode_gop_header(ctx, avctx))
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return -1;
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}
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if (ctx->frame_type != FRAMETYPE_NULL) {
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ctx->frame_flags = get_bits(&ctx->gb, 8);
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ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits_long(&ctx->gb, 24) : 0;
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ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0;
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/* skip unknown extension if any */
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if (ctx->frame_flags & 0x20)
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skip_hdr_extension(&ctx->gb); /* XXX: untested */
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/* decode macroblock huffman codebook */
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if (ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40, IVI_MB_HUFF, &ctx->mb_vlc, avctx))
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return -1;
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skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */
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}
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align_get_bits(&ctx->gb);
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return 0;
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}
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/**
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* Decode Indeo5 band header.
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*
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* @param[in,out] ctx ptr to the decoder context
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* @param[in,out] band ptr to the band descriptor
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* @param[in] avctx ptr to the AVCodecContext
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* @return result code: 0 = OK, -1 = error
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*/
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static int decode_band_hdr(IVI5DecContext *ctx, IVIBandDesc *band,
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AVCodecContext *avctx)
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{
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int i;
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uint8_t band_flags;
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band_flags = get_bits(&ctx->gb, 8);
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if (band_flags & 1) {
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band->is_empty = 1;
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return 0;
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}
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band->data_size = (ctx->frame_flags & 0x80) ? get_bits_long(&ctx->gb, 24) : 0;
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band->inherit_mv = band_flags & 2;
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band->inherit_qdelta = band_flags & 8;
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band->qdelta_present = band_flags & 4;
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if (!band->qdelta_present) band->inherit_qdelta = 1;
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/* decode rvmap probability corrections if any */
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band->num_corr = 0; /* there are no corrections */
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if (band_flags & 0x10) {
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band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */
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if (band->num_corr > 61) {
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av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n",
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band->num_corr);
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return -1;
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}
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/* read correction pairs */
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for (i = 0; i < band->num_corr * 2; i++)
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band->corr[i] = get_bits(&ctx->gb, 8);
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}
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/* select appropriate rvmap table for this band */
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band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8;
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/* decode block huffman codebook */
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if (ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF, &band->blk_vlc, avctx))
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return -1;
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band->checksum_present = get_bits1(&ctx->gb);
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if (band->checksum_present)
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band->checksum = get_bits(&ctx->gb, 16);
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band->glob_quant = get_bits(&ctx->gb, 5);
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/* skip unknown extension if any */
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if (band_flags & 0x20) { /* XXX: untested */
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align_get_bits(&ctx->gb);
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skip_hdr_extension(&ctx->gb);
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}
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align_get_bits(&ctx->gb);
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return 0;
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}
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/**
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* Decode info (block type, cbp, quant delta, motion vector)
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* for all macroblocks in the current tile.
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*
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* @param[in,out] ctx ptr to the decoder context
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* @param[in,out] band ptr to the band descriptor
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* @param[in,out] tile ptr to the tile descriptor
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* @param[in] avctx ptr to the AVCodecContext
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* @return result code: 0 = OK, -1 = error
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*/
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static int decode_mb_info(IVI5DecContext *ctx, IVIBandDesc *band,
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IVITile *tile, AVCodecContext *avctx)
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{
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int x, y, mv_x, mv_y, mv_delta, offs, mb_offset,
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mv_scale, blks_per_mb;
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IVIMbInfo *mb, *ref_mb;
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int row_offset = band->mb_size * band->pitch;
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mb = tile->mbs;
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ref_mb = tile->ref_mbs;
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offs = tile->ypos * band->pitch + tile->xpos;
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if (!ref_mb &&
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((band->qdelta_present && band->inherit_qdelta) || band->inherit_mv))
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return AVERROR_INVALIDDATA;
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/* scale factor for motion vectors */
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mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3);
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mv_x = mv_y = 0;
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for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) {
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mb_offset = offs;
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for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) {
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mb->xpos = x;
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mb->ypos = y;
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mb->buf_offs = mb_offset;
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if (get_bits1(&ctx->gb)) {
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if (ctx->frame_type == FRAMETYPE_INTRA) {
|
|
av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");
|
|
return -1;
|
|
}
|
|
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){
|
|
/* 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_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){
|
|
/* 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 Indeo5 band.
|
|
*
|
|
* @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(IVI5DecContext *ctx, int plane_num,
|
|
IVIBandDesc *band, AVCodecContext *avctx)
|
|
{
|
|
int result, i, t, idx1, idx2, pos;
|
|
IVITile *tile;
|
|
|
|
band->buf = band->bufs[ctx->dst_buf];
|
|
band->ref_buf = band->bufs[ctx->ref_buf];
|
|
band->data_ptr = ctx->frame_data + (get_bits_count(&ctx->gb) >> 3);
|
|
|
|
result = decode_band_hdr(ctx, band, avctx);
|
|
if (result) {
|
|
av_log(avctx, AV_LOG_ERROR, "Error while decoding band header: %d\n",
|
|
result);
|
|
return -1;
|
|
}
|
|
|
|
if (band->is_empty) {
|
|
av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n");
|
|
return -1;
|
|
}
|
|
|
|
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));
|
|
} else {
|
|
tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb);
|
|
|
|
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]);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
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 result;
|
|
}
|
|
|
|
|
|
/**
|
|
* Switch buffers.
|
|
*
|
|
* @param[in,out] ctx ptr to the decoder context
|
|
*/
|
|
static void switch_buffers(IVI5DecContext *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;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Initialize Indeo5 decoder.
|
|
*/
|
|
static av_cold int decode_init(AVCodecContext *avctx)
|
|
{
|
|
IVI5DecContext *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);
|
|
if (result) {
|
|
av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n");
|
|
return -1;
|
|
}
|
|
|
|
ctx->buf_switch = 0;
|
|
ctx->inter_scal = 0;
|
|
|
|
avctx->pix_fmt = PIX_FMT_YUV410P;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* main decoder function
|
|
*/
|
|
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
|
|
AVPacket *avpkt)
|
|
{
|
|
IVI5DecContext *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);
|
|
ctx->frame_data = buf;
|
|
ctx->frame_size = buf_size;
|
|
|
|
result = decode_pic_hdr(ctx, avctx);
|
|
if (result) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Error while decoding picture header: %d\n", result);
|
|
return -1;
|
|
}
|
|
|
|
if (ctx->gop_flags & IVI5_IS_PROTECTED) {
|
|
av_log(avctx, AV_LOG_ERROR, "Password-protected clip!\n");
|
|
return -1;
|
|
}
|
|
|
|
switch_buffers(ctx);
|
|
|
|
//{ START_TIMER;
|
|
|
|
if (ctx->frame_type != FRAMETYPE_NULL) {
|
|
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 while decoding band: %d, plane: %d\n", b, p);
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//STOP_TIMER("decode_planes"); }
|
|
|
|
if (ctx->frame.data[0])
|
|
avctx->release_buffer(avctx, &ctx->frame);
|
|
|
|
ctx->frame.reference = 0;
|
|
if (avctx->get_buffer(avctx, &ctx->frame) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
|
return -1;
|
|
}
|
|
|
|
if (ctx->is_scalable) {
|
|
ff_ivi_recompose53 (&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;
|
|
}
|
|
|
|
|
|
/**
|
|
* Close Indeo5 decoder and clean up its context.
|
|
*/
|
|
static av_cold int decode_close(AVCodecContext *avctx)
|
|
{
|
|
IVI5DecContext *ctx = avctx->priv_data;
|
|
|
|
ff_ivi_free_buffers(&ctx->planes[0]);
|
|
|
|
if (ctx->mb_vlc.cust_tab.table)
|
|
free_vlc(&ctx->mb_vlc.cust_tab);
|
|
|
|
if (ctx->frame.data[0])
|
|
avctx->release_buffer(avctx, &ctx->frame);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
AVCodec ff_indeo5_decoder = {
|
|
.name = "indeo5",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = CODEC_ID_INDEO5,
|
|
.priv_data_size = sizeof(IVI5DecContext),
|
|
.init = decode_init,
|
|
.close = decode_close,
|
|
.decode = decode_frame,
|
|
.long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"),
|
|
};
|