543 lines
17 KiB
C
543 lines
17 KiB
C
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/*
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* Copyright (c) 2002 The FFmpeg Project
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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#include "avcodec.h"
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#include "h263.h"
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#include "internal.h"
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#include "intrax8.h"
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#include "mathops.h"
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#include "mpegutils.h"
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#include "mpegvideo.h"
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#include "msmpeg4.h"
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#include "msmpeg4data.h"
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#include "wmv2.h"
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static int parse_mb_skip(Wmv2Context *w)
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{
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int mb_x, mb_y;
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int coded_mb_count = 0;
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MpegEncContext *const s = &w->s;
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uint32_t *const mb_type = s->current_picture_ptr->mb_type;
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w->skip_type = get_bits(&s->gb, 2);
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switch (w->skip_type) {
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case SKIP_TYPE_NONE:
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for (mb_y = 0; mb_y < s->mb_height; mb_y++)
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for (mb_x = 0; mb_x < s->mb_width; mb_x++)
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mb_type[mb_y * s->mb_stride + mb_x] =
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MB_TYPE_16x16 | MB_TYPE_L0;
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break;
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case SKIP_TYPE_MPEG:
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if (get_bits_left(&s->gb) < s->mb_height * s->mb_width)
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return AVERROR_INVALIDDATA;
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for (mb_y = 0; mb_y < s->mb_height; mb_y++)
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for (mb_x = 0; mb_x < s->mb_width; mb_x++)
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mb_type[mb_y * s->mb_stride + mb_x] =
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(get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
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break;
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case SKIP_TYPE_ROW:
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for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
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if (get_bits_left(&s->gb) < 1)
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return AVERROR_INVALIDDATA;
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if (get_bits1(&s->gb)) {
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for (mb_x = 0; mb_x < s->mb_width; mb_x++)
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mb_type[mb_y * s->mb_stride + mb_x] =
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MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
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} else {
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for (mb_x = 0; mb_x < s->mb_width; mb_x++)
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mb_type[mb_y * s->mb_stride + mb_x] =
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(get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
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}
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}
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break;
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case SKIP_TYPE_COL:
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for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
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if (get_bits_left(&s->gb) < 1)
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return AVERROR_INVALIDDATA;
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if (get_bits1(&s->gb)) {
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for (mb_y = 0; mb_y < s->mb_height; mb_y++)
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mb_type[mb_y * s->mb_stride + mb_x] =
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MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
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} else {
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for (mb_y = 0; mb_y < s->mb_height; mb_y++)
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mb_type[mb_y * s->mb_stride + mb_x] =
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(get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
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}
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}
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break;
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}
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for (mb_y = 0; mb_y < s->mb_height; mb_y++)
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for (mb_x = 0; mb_x < s->mb_width; mb_x++)
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coded_mb_count += !IS_SKIP(mb_type[mb_y * s->mb_stride + mb_x]);
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if (coded_mb_count > get_bits_left(&s->gb))
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return AVERROR_INVALIDDATA;
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return 0;
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}
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static int decode_ext_header(Wmv2Context *w)
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{
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MpegEncContext *const s = &w->s;
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GetBitContext gb;
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int fps;
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int code;
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if (s->avctx->extradata_size < 4)
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return AVERROR_INVALIDDATA;
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init_get_bits(&gb, s->avctx->extradata, 32);
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fps = get_bits(&gb, 5);
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s->bit_rate = get_bits(&gb, 11) * 1024;
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w->mspel_bit = get_bits1(&gb);
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s->loop_filter = get_bits1(&gb);
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w->abt_flag = get_bits1(&gb);
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w->j_type_bit = get_bits1(&gb);
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w->top_left_mv_flag = get_bits1(&gb);
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w->per_mb_rl_bit = get_bits1(&gb);
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code = get_bits(&gb, 3);
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if (code == 0)
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return AVERROR_INVALIDDATA;
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s->slice_height = s->mb_height / code;
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if (s->avctx->debug & FF_DEBUG_PICT_INFO)
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av_log(s->avctx, AV_LOG_DEBUG,
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"fps:%d, br:%"PRId64", qpbit:%d, abt_flag:%d, j_type_bit:%d, "
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"tl_mv_flag:%d, mbrl_bit:%d, code:%d, loop_filter:%d, "
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"slices:%d\n",
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fps, s->bit_rate, w->mspel_bit, w->abt_flag, w->j_type_bit,
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w->top_left_mv_flag, w->per_mb_rl_bit, code, s->loop_filter,
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code);
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return 0;
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}
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int ff_wmv2_decode_picture_header(MpegEncContext *s)
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{
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Wmv2Context *const w = (Wmv2Context *) s;
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int code;
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if (s->picture_number == 0)
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decode_ext_header(w);
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s->pict_type = get_bits1(&s->gb) + 1;
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if (s->pict_type == AV_PICTURE_TYPE_I) {
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code = get_bits(&s->gb, 7);
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av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code);
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}
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s->chroma_qscale = s->qscale = get_bits(&s->gb, 5);
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if (s->qscale <= 0)
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return AVERROR_INVALIDDATA;
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if (s->pict_type != AV_PICTURE_TYPE_I && show_bits(&s->gb, 1)) {
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GetBitContext gb = s->gb;
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int skip_type = get_bits(&gb, 2);
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int run = skip_type == SKIP_TYPE_COL ? s->mb_width : s->mb_height;
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while (run > 0) {
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int block = FFMIN(run, 25);
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if (get_bits(&gb, block) + 1 != 1<<block)
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break;
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run -= block;
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}
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if (!run)
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return FRAME_SKIPPED;
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}
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return 0;
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}
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int ff_wmv2_decode_secondary_picture_header(MpegEncContext *s)
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{
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Wmv2Context *const w = (Wmv2Context *) s;
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if (s->pict_type == AV_PICTURE_TYPE_I) {
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if (w->j_type_bit)
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w->j_type = get_bits1(&s->gb);
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else
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w->j_type = 0; // FIXME check
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if (!w->j_type) {
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if (w->per_mb_rl_bit)
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s->per_mb_rl_table = get_bits1(&s->gb);
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else
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s->per_mb_rl_table = 0;
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if (!s->per_mb_rl_table) {
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s->rl_chroma_table_index = decode012(&s->gb);
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s->rl_table_index = decode012(&s->gb);
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}
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s->dc_table_index = get_bits1(&s->gb);
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// at minimum one bit per macroblock is required at least in a valid frame,
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// we discard frames much smaller than this. Frames smaller than 1/8 of the
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// smallest "black/skip" frame generally contain not much recoverable content
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// while at the same time they have the highest computational requirements
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// per byte
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if (get_bits_left(&s->gb) * 8LL < (s->width+15)/16 * ((s->height+15)/16))
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return AVERROR_INVALIDDATA;
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}
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s->inter_intra_pred = 0;
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s->no_rounding = 1;
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if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
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av_log(s->avctx, AV_LOG_DEBUG,
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"qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n",
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s->qscale, s->rl_chroma_table_index, s->rl_table_index,
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s->dc_table_index, s->per_mb_rl_table, w->j_type);
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}
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} else {
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int cbp_index;
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int ret;
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w->j_type = 0;
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ret = parse_mb_skip(w);
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if (ret < 0)
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return ret;
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cbp_index = decode012(&s->gb);
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w->cbp_table_index = wmv2_get_cbp_table_index(s, cbp_index);
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if (w->mspel_bit)
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s->mspel = get_bits1(&s->gb);
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else
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s->mspel = 0; // FIXME check
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if (w->abt_flag) {
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w->per_mb_abt = get_bits1(&s->gb) ^ 1;
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if (!w->per_mb_abt)
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w->abt_type = decode012(&s->gb);
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}
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if (w->per_mb_rl_bit)
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s->per_mb_rl_table = get_bits1(&s->gb);
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else
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s->per_mb_rl_table = 0;
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if (!s->per_mb_rl_table) {
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s->rl_table_index = decode012(&s->gb);
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s->rl_chroma_table_index = s->rl_table_index;
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}
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if (get_bits_left(&s->gb) < 2)
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return AVERROR_INVALIDDATA;
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s->dc_table_index = get_bits1(&s->gb);
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s->mv_table_index = get_bits1(&s->gb);
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s->inter_intra_pred = 0; // (s->width * s->height < 320 * 240 && s->bit_rate <= II_BITRATE);
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s->no_rounding ^= 1;
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if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
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av_log(s->avctx, AV_LOG_DEBUG,
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"rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d mspel:%d "
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"per_mb_abt:%d abt_type:%d cbp:%d ii:%d\n",
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s->rl_table_index, s->rl_chroma_table_index,
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s->dc_table_index, s->mv_table_index,
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s->per_mb_rl_table, s->qscale, s->mspel,
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w->per_mb_abt, w->abt_type, w->cbp_table_index,
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s->inter_intra_pred);
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}
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}
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s->esc3_level_length = 0;
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s->esc3_run_length = 0;
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s->picture_number++; // FIXME ?
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if (w->j_type) {
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ff_intrax8_decode_picture(&w->x8, &s->current_picture,
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&s->gb, &s->mb_x, &s->mb_y,
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2 * s->qscale, (s->qscale - 1) | 1,
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s->loop_filter, s->low_delay);
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ff_er_add_slice(&w->s.er, 0, 0,
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(w->s.mb_x >> 1) - 1, (w->s.mb_y >> 1) - 1,
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ER_MB_END);
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return 1;
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}
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return 0;
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}
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static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr)
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{
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MpegEncContext *const s = &w->s;
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int ret;
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ret = ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr);
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if (ret < 0)
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return ret;
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if ((((*mx_ptr) | (*my_ptr)) & 1) && s->mspel)
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w->hshift = get_bits1(&s->gb);
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else
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w->hshift = 0;
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return 0;
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}
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static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py)
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{
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MpegEncContext *const s = &w->s;
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int xy, wrap, diff, type;
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int16_t *A, *B, *C, *mot_val;
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wrap = s->b8_stride;
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xy = s->block_index[0];
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mot_val = s->current_picture.motion_val[0][xy];
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A = s->current_picture.motion_val[0][xy - 1];
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B = s->current_picture.motion_val[0][xy - wrap];
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C = s->current_picture.motion_val[0][xy + 2 - wrap];
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if (s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag)
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diff = FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1]));
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else
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diff = 0;
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if (diff >= 8)
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type = get_bits1(&s->gb);
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else
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type = 2;
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if (type == 0) {
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*px = A[0];
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*py = A[1];
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} else if (type == 1) {
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*px = B[0];
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*py = B[1];
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} else {
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/* special case for first (slice) line */
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if (s->first_slice_line) {
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*px = A[0];
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*py = A[1];
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} else {
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*px = mid_pred(A[0], B[0], C[0]);
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*py = mid_pred(A[1], B[1], C[1]);
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}
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}
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|
|
||
|
|
return mot_val;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int wmv2_decode_inter_block(Wmv2Context *w, int16_t *block,
|
||
|
|
int n, int cbp)
|
||
|
|
{
|
||
|
|
MpegEncContext *const s = &w->s;
|
||
|
|
static const int sub_cbp_table[3] = { 2, 3, 1 };
|
||
|
|
int sub_cbp, ret;
|
||
|
|
|
||
|
|
if (!cbp) {
|
||
|
|
s->block_last_index[n] = -1;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (w->per_block_abt)
|
||
|
|
w->abt_type = decode012(&s->gb);
|
||
|
|
w->abt_type_table[n] = w->abt_type;
|
||
|
|
|
||
|
|
if (w->abt_type) {
|
||
|
|
// const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].permutated;
|
||
|
|
const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].scantable;
|
||
|
|
// const uint8_t *scantable = w->abt_type - 1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
|
||
|
|
|
||
|
|
sub_cbp = sub_cbp_table[decode012(&s->gb)];
|
||
|
|
|
||
|
|
if (sub_cbp & 1)
|
||
|
|
if ((ret = ff_msmpeg4_decode_block(s, block, n, 1, scantable)) < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
if (sub_cbp & 2)
|
||
|
|
if ((ret = ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable)) < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
s->block_last_index[n] = 63;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
} else {
|
||
|
|
return ff_msmpeg4_decode_block(s, block, n, 1,
|
||
|
|
s->inter_scantable.permutated);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
int ff_wmv2_decode_mb(MpegEncContext *s, int16_t block[6][64])
|
||
|
|
{
|
||
|
|
Wmv2Context *const w = (Wmv2Context *) s;
|
||
|
|
int cbp, code, i, ret;
|
||
|
|
uint8_t *coded_val;
|
||
|
|
|
||
|
|
if (w->j_type)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (s->pict_type == AV_PICTURE_TYPE_P) {
|
||
|
|
if (IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])) {
|
||
|
|
/* skip mb */
|
||
|
|
s->mb_intra = 0;
|
||
|
|
for (i = 0; i < 6; i++)
|
||
|
|
s->block_last_index[i] = -1;
|
||
|
|
s->mv_dir = MV_DIR_FORWARD;
|
||
|
|
s->mv_type = MV_TYPE_16X16;
|
||
|
|
s->mv[0][0][0] = 0;
|
||
|
|
s->mv[0][0][1] = 0;
|
||
|
|
s->mb_skipped = 1;
|
||
|
|
w->hshift = 0;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
if (get_bits_left(&s->gb) <= 0)
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
|
||
|
|
code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[w->cbp_table_index].table,
|
||
|
|
MB_NON_INTRA_VLC_BITS, 3);
|
||
|
|
if (code < 0)
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
s->mb_intra = (~code & 0x40) >> 6;
|
||
|
|
|
||
|
|
cbp = code & 0x3f;
|
||
|
|
} else {
|
||
|
|
s->mb_intra = 1;
|
||
|
|
if (get_bits_left(&s->gb) <= 0)
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
|
||
|
|
if (code < 0) {
|
||
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
||
|
|
"II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
}
|
||
|
|
/* predict coded block pattern */
|
||
|
|
cbp = 0;
|
||
|
|
for (i = 0; i < 6; i++) {
|
||
|
|
int val = ((code >> (5 - i)) & 1);
|
||
|
|
if (i < 4) {
|
||
|
|
int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val);
|
||
|
|
val = val ^ pred;
|
||
|
|
*coded_val = val;
|
||
|
|
}
|
||
|
|
cbp |= val << (5 - i);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!s->mb_intra) {
|
||
|
|
int mx, my;
|
||
|
|
wmv2_pred_motion(w, &mx, &my);
|
||
|
|
|
||
|
|
if (cbp) {
|
||
|
|
s->bdsp.clear_blocks(s->block[0]);
|
||
|
|
if (s->per_mb_rl_table) {
|
||
|
|
s->rl_table_index = decode012(&s->gb);
|
||
|
|
s->rl_chroma_table_index = s->rl_table_index;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (w->abt_flag && w->per_mb_abt) {
|
||
|
|
w->per_block_abt = get_bits1(&s->gb);
|
||
|
|
if (!w->per_block_abt)
|
||
|
|
w->abt_type = decode012(&s->gb);
|
||
|
|
} else
|
||
|
|
w->per_block_abt = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((ret = wmv2_decode_motion(w, &mx, &my)) < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
s->mv_dir = MV_DIR_FORWARD;
|
||
|
|
s->mv_type = MV_TYPE_16X16;
|
||
|
|
s->mv[0][0][0] = mx;
|
||
|
|
s->mv[0][0][1] = my;
|
||
|
|
|
||
|
|
for (i = 0; i < 6; i++) {
|
||
|
|
if ((ret = wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1)) < 0) {
|
||
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
||
|
|
"\nerror while decoding inter block: %d x %d (%d)\n",
|
||
|
|
s->mb_x, s->mb_y, i);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if (s->pict_type == AV_PICTURE_TYPE_P)
|
||
|
|
ff_dlog(s->avctx, "%d%d ", s->inter_intra_pred, cbp);
|
||
|
|
ff_dlog(s->avctx, "I at %d %d %d %06X\n", s->mb_x, s->mb_y,
|
||
|
|
((cbp & 3) ? 1 : 0) + ((cbp & 0x3C) ? 2 : 0),
|
||
|
|
show_bits(&s->gb, 24));
|
||
|
|
s->ac_pred = get_bits1(&s->gb);
|
||
|
|
if (s->inter_intra_pred) {
|
||
|
|
s->h263_aic_dir = get_vlc2(&s->gb, ff_inter_intra_vlc.table,
|
||
|
|
INTER_INTRA_VLC_BITS, 1);
|
||
|
|
ff_dlog(s->avctx, "%d%d %d %d/",
|
||
|
|
s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
|
||
|
|
}
|
||
|
|
if (s->per_mb_rl_table && cbp) {
|
||
|
|
s->rl_table_index = decode012(&s->gb);
|
||
|
|
s->rl_chroma_table_index = s->rl_table_index;
|
||
|
|
}
|
||
|
|
|
||
|
|
s->bdsp.clear_blocks(s->block[0]);
|
||
|
|
for (i = 0; i < 6; i++) {
|
||
|
|
if ((ret = ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL)) < 0) {
|
||
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
||
|
|
"\nerror while decoding intra block: %d x %d (%d)\n",
|
||
|
|
s->mb_x, s->mb_y, i);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static av_cold int wmv2_decode_init(AVCodecContext *avctx)
|
||
|
|
{
|
||
|
|
Wmv2Context *const w = avctx->priv_data;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
ff_wmv2_common_init(w);
|
||
|
|
|
||
|
|
return ff_intrax8_common_init(avctx, &w->x8, &w->s.idsp,
|
||
|
|
w->s.block, w->s.block_last_index,
|
||
|
|
w->s.mb_width, w->s.mb_height);
|
||
|
|
}
|
||
|
|
|
||
|
|
static av_cold int wmv2_decode_end(AVCodecContext *avctx)
|
||
|
|
{
|
||
|
|
Wmv2Context *w = avctx->priv_data;
|
||
|
|
|
||
|
|
ff_intrax8_common_end(&w->x8);
|
||
|
|
return ff_h263_decode_end(avctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
AVCodec ff_wmv2_decoder = {
|
||
|
|
.name = "wmv2",
|
||
|
|
.long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
|
||
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
||
|
|
.id = AV_CODEC_ID_WMV2,
|
||
|
|
.priv_data_size = sizeof(Wmv2Context),
|
||
|
|
.init = wmv2_decode_init,
|
||
|
|
.close = wmv2_decode_end,
|
||
|
|
.decode = ff_h263_decode_frame,
|
||
|
|
.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1,
|
||
|
|
.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
|
||
|
|
AV_PIX_FMT_NONE },
|
||
|
|
};
|