895 lines
31 KiB
C
895 lines
31 KiB
C
/*
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* H.26L/H.264/AVC/JVT/14496-10/... reference picture handling
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* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
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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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/**
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* @file
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* H.264 / AVC / MPEG-4 part10 reference picture handling.
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* @author Michael Niedermayer <michaelni@gmx.at>
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*/
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#include <inttypes.h>
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#include "libavutil/avassert.h"
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#include "internal.h"
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#include "avcodec.h"
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#include "h264.h"
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#include "h264dec.h"
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#include "golomb.h"
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#include "mpegutils.h"
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#include <assert.h>
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static void pic_as_field(H264Ref *pic, const int parity)
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{
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int i;
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for (i = 0; i < FF_ARRAY_ELEMS(pic->data); ++i) {
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if (parity == PICT_BOTTOM_FIELD)
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pic->data[i] += pic->linesize[i];
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pic->reference = parity;
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pic->linesize[i] *= 2;
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}
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pic->poc = pic->parent->field_poc[parity == PICT_BOTTOM_FIELD];
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}
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static void ref_from_h264pic(H264Ref *dst, H264Picture *src)
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{
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memcpy(dst->data, src->f->data, sizeof(dst->data));
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memcpy(dst->linesize, src->f->linesize, sizeof(dst->linesize));
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dst->reference = src->reference;
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dst->poc = src->poc;
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dst->pic_id = src->pic_id;
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dst->parent = src;
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}
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static int split_field_copy(H264Ref *dest, H264Picture *src, int parity, int id_add)
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{
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int match = !!(src->reference & parity);
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if (match) {
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ref_from_h264pic(dest, src);
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if (parity != PICT_FRAME) {
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pic_as_field(dest, parity);
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dest->pic_id *= 2;
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dest->pic_id += id_add;
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}
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}
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return match;
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}
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static int build_def_list(H264Ref *def, int def_len,
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H264Picture * const *in, int len, int is_long, int sel)
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{
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int i[2] = { 0 };
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int index = 0;
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while (i[0] < len || i[1] < len) {
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while (i[0] < len && !(in[i[0]] && (in[i[0]]->reference & sel)))
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i[0]++;
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while (i[1] < len && !(in[i[1]] && (in[i[1]]->reference & (sel ^ 3))))
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i[1]++;
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if (i[0] < len) {
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av_assert0(index < def_len);
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in[i[0]]->pic_id = is_long ? i[0] : in[i[0]]->frame_num;
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split_field_copy(&def[index++], in[i[0]++], sel, 1);
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}
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if (i[1] < len) {
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av_assert0(index < def_len);
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in[i[1]]->pic_id = is_long ? i[1] : in[i[1]]->frame_num;
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split_field_copy(&def[index++], in[i[1]++], sel ^ 3, 0);
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}
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}
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return index;
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}
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static int add_sorted(H264Picture **sorted, H264Picture * const *src,
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int len, int limit, int dir)
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{
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int i, best_poc;
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int out_i = 0;
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for (;;) {
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best_poc = dir ? INT_MIN : INT_MAX;
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for (i = 0; i < len; i++) {
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const int poc = src[i]->poc;
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if (((poc > limit) ^ dir) && ((poc < best_poc) ^ dir)) {
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best_poc = poc;
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sorted[out_i] = src[i];
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}
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}
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if (best_poc == (dir ? INT_MIN : INT_MAX))
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break;
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limit = sorted[out_i++]->poc - dir;
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}
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return out_i;
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}
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static int mismatches_ref(const H264Context *h, const H264Picture *pic)
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{
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const AVFrame *f = pic->f;
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return (h->cur_pic_ptr->f->width != f->width ||
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h->cur_pic_ptr->f->height != f->height ||
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h->cur_pic_ptr->f->format != f->format);
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}
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static void h264_initialise_ref_list(H264Context *h, H264SliceContext *sl)
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{
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int i, len;
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int j;
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if (sl->slice_type_nos == AV_PICTURE_TYPE_B) {
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H264Picture *sorted[32];
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int cur_poc, list;
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int lens[2];
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if (FIELD_PICTURE(h))
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cur_poc = h->cur_pic_ptr->field_poc[h->picture_structure == PICT_BOTTOM_FIELD];
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else
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cur_poc = h->cur_pic_ptr->poc;
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for (list = 0; list < 2; list++) {
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len = add_sorted(sorted, h->short_ref, h->short_ref_count, cur_poc, 1 ^ list);
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len += add_sorted(sorted + len, h->short_ref, h->short_ref_count, cur_poc, 0 ^ list);
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av_assert0(len <= 32);
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len = build_def_list(sl->ref_list[list], FF_ARRAY_ELEMS(sl->ref_list[0]),
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sorted, len, 0, h->picture_structure);
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len += build_def_list(sl->ref_list[list] + len,
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FF_ARRAY_ELEMS(sl->ref_list[0]) - len,
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h->long_ref, 16, 1, h->picture_structure);
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av_assert0(len <= 32);
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if (len < sl->ref_count[list])
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memset(&sl->ref_list[list][len], 0, sizeof(H264Ref) * (sl->ref_count[list] - len));
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lens[list] = len;
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}
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if (lens[0] == lens[1] && lens[1] > 1) {
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for (i = 0; i < lens[0] &&
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sl->ref_list[0][i].parent->f->buf[0]->buffer ==
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sl->ref_list[1][i].parent->f->buf[0]->buffer; i++);
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if (i == lens[0]) {
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FFSWAP(H264Ref, sl->ref_list[1][0], sl->ref_list[1][1]);
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}
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}
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} else {
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len = build_def_list(sl->ref_list[0], FF_ARRAY_ELEMS(sl->ref_list[0]),
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h->short_ref, h->short_ref_count, 0, h->picture_structure);
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len += build_def_list(sl->ref_list[0] + len,
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FF_ARRAY_ELEMS(sl->ref_list[0]) - len,
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h-> long_ref, 16, 1, h->picture_structure);
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av_assert0(len <= 32);
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if (len < sl->ref_count[0])
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memset(&sl->ref_list[0][len], 0, sizeof(H264Ref) * (sl->ref_count[0] - len));
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}
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#ifdef TRACE
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for (i = 0; i < sl->ref_count[0]; i++) {
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ff_tlog(h->avctx, "List0: %s fn:%d 0x%p\n",
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(sl->ref_list[0][i].parent ? (sl->ref_list[0][i].parent->long_ref ? "LT" : "ST") : "??"),
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sl->ref_list[0][i].pic_id,
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sl->ref_list[0][i].data[0]);
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}
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if (sl->slice_type_nos == AV_PICTURE_TYPE_B) {
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for (i = 0; i < sl->ref_count[1]; i++) {
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ff_tlog(h->avctx, "List1: %s fn:%d 0x%p\n",
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(sl->ref_list[1][i].parent ? (sl->ref_list[1][i].parent->long_ref ? "LT" : "ST") : "??"),
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sl->ref_list[1][i].pic_id,
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sl->ref_list[1][i].data[0]);
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}
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}
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#endif
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for (j = 0; j<1+(sl->slice_type_nos == AV_PICTURE_TYPE_B); j++) {
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for (i = 0; i < sl->ref_count[j]; i++) {
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if (sl->ref_list[j][i].parent) {
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if (mismatches_ref(h, sl->ref_list[j][i].parent)) {
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av_log(h->avctx, AV_LOG_ERROR, "Discarding mismatching reference\n");
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memset(&sl->ref_list[j][i], 0, sizeof(sl->ref_list[j][i]));
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}
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}
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}
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}
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for (i = 0; i < sl->list_count; i++)
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h->default_ref[i] = sl->ref_list[i][0];
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}
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/**
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* print short term list
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*/
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static void print_short_term(const H264Context *h)
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{
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uint32_t i;
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if (h->avctx->debug & FF_DEBUG_MMCO) {
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av_log(h->avctx, AV_LOG_DEBUG, "short term list:\n");
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for (i = 0; i < h->short_ref_count; i++) {
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H264Picture *pic = h->short_ref[i];
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av_log(h->avctx, AV_LOG_DEBUG, "%"PRIu32" fn:%d poc:%d %p\n",
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i, pic->frame_num, pic->poc, pic->f->data[0]);
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}
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}
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}
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/**
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* print long term list
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*/
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static void print_long_term(const H264Context *h)
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{
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uint32_t i;
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if (h->avctx->debug & FF_DEBUG_MMCO) {
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av_log(h->avctx, AV_LOG_DEBUG, "long term list:\n");
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for (i = 0; i < 16; i++) {
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H264Picture *pic = h->long_ref[i];
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if (pic) {
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av_log(h->avctx, AV_LOG_DEBUG, "%"PRIu32" fn:%d poc:%d %p\n",
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i, pic->frame_num, pic->poc, pic->f->data[0]);
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}
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}
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}
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}
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/**
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* Extract structure information about the picture described by pic_num in
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* the current decoding context (frame or field). Note that pic_num is
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* picture number without wrapping (so, 0<=pic_num<max_pic_num).
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* @param pic_num picture number for which to extract structure information
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* @param structure one of PICT_XXX describing structure of picture
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* with pic_num
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* @return frame number (short term) or long term index of picture
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* described by pic_num
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*/
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static int pic_num_extract(const H264Context *h, int pic_num, int *structure)
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{
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*structure = h->picture_structure;
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if (FIELD_PICTURE(h)) {
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if (!(pic_num & 1))
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/* opposite field */
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*structure ^= PICT_FRAME;
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pic_num >>= 1;
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}
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return pic_num;
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}
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static void h264_fill_mbaff_ref_list(H264SliceContext *sl)
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{
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int list, i, j;
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for (list = 0; list < sl->list_count; list++) {
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for (i = 0; i < sl->ref_count[list]; i++) {
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H264Ref *frame = &sl->ref_list[list][i];
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H264Ref *field = &sl->ref_list[list][16 + 2 * i];
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field[0] = *frame;
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for (j = 0; j < 3; j++)
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field[0].linesize[j] <<= 1;
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field[0].reference = PICT_TOP_FIELD;
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field[0].poc = field[0].parent->field_poc[0];
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field[1] = field[0];
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for (j = 0; j < 3; j++)
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field[1].data[j] += frame->parent->f->linesize[j];
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field[1].reference = PICT_BOTTOM_FIELD;
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field[1].poc = field[1].parent->field_poc[1];
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}
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}
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}
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int ff_h264_build_ref_list(H264Context *h, H264SliceContext *sl)
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{
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int list, index, pic_structure;
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print_short_term(h);
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print_long_term(h);
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h264_initialise_ref_list(h, sl);
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for (list = 0; list < sl->list_count; list++) {
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int pred = sl->curr_pic_num;
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for (index = 0; index < sl->nb_ref_modifications[list]; index++) {
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unsigned int modification_of_pic_nums_idc = sl->ref_modifications[list][index].op;
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unsigned int val = sl->ref_modifications[list][index].val;
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unsigned int pic_id;
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int i;
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H264Picture *ref = NULL;
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switch (modification_of_pic_nums_idc) {
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case 0:
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case 1: {
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const unsigned int abs_diff_pic_num = val + 1;
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int frame_num;
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if (abs_diff_pic_num > sl->max_pic_num) {
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av_log(h->avctx, AV_LOG_ERROR,
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"abs_diff_pic_num overflow\n");
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return AVERROR_INVALIDDATA;
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}
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if (modification_of_pic_nums_idc == 0)
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pred -= abs_diff_pic_num;
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else
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pred += abs_diff_pic_num;
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pred &= sl->max_pic_num - 1;
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frame_num = pic_num_extract(h, pred, &pic_structure);
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for (i = h->short_ref_count - 1; i >= 0; i--) {
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ref = h->short_ref[i];
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assert(ref->reference);
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assert(!ref->long_ref);
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if (ref->frame_num == frame_num &&
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(ref->reference & pic_structure))
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break;
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}
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if (i >= 0)
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ref->pic_id = pred;
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break;
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}
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case 2: {
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int long_idx;
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pic_id = val; // long_term_pic_idx
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long_idx = pic_num_extract(h, pic_id, &pic_structure);
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if (long_idx > 31U) {
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av_log(h->avctx, AV_LOG_ERROR,
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"long_term_pic_idx overflow\n");
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return AVERROR_INVALIDDATA;
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}
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ref = h->long_ref[long_idx];
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assert(!(ref && !ref->reference));
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if (ref && (ref->reference & pic_structure)) {
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ref->pic_id = pic_id;
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assert(ref->long_ref);
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i = 0;
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} else {
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i = -1;
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}
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break;
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}
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default:
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av_assert0(0);
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}
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if (i < 0 || mismatches_ref(h, ref)) {
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av_log(h->avctx, AV_LOG_ERROR,
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i < 0 ? "reference picture missing during reorder\n" :
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"mismatching reference\n"
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);
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memset(&sl->ref_list[list][index], 0, sizeof(sl->ref_list[0][0])); // FIXME
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} else {
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for (i = index; i + 1 < sl->ref_count[list]; i++) {
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if (sl->ref_list[list][i].parent &&
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ref->long_ref == sl->ref_list[list][i].parent->long_ref &&
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ref->pic_id == sl->ref_list[list][i].pic_id)
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break;
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}
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for (; i > index; i--) {
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sl->ref_list[list][i] = sl->ref_list[list][i - 1];
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}
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ref_from_h264pic(&sl->ref_list[list][index], ref);
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if (FIELD_PICTURE(h)) {
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pic_as_field(&sl->ref_list[list][index], pic_structure);
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}
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}
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}
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}
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for (list = 0; list < sl->list_count; list++) {
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for (index = 0; index < sl->ref_count[list]; index++) {
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if ( !sl->ref_list[list][index].parent
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|| (!FIELD_PICTURE(h) && (sl->ref_list[list][index].reference&3) != 3)) {
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int i;
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av_log(h->avctx, AV_LOG_ERROR, "Missing reference picture, default is %d\n", h->default_ref[list].poc);
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for (i = 0; i < FF_ARRAY_ELEMS(h->last_pocs); i++)
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h->last_pocs[i] = INT_MIN;
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if (h->default_ref[list].parent
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&& !(!FIELD_PICTURE(h) && (h->default_ref[list].reference&3) != 3))
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sl->ref_list[list][index] = h->default_ref[list];
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else
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return -1;
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}
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av_assert0(av_buffer_get_ref_count(sl->ref_list[list][index].parent->f->buf[0]) > 0);
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}
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}
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if (FRAME_MBAFF(h))
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h264_fill_mbaff_ref_list(sl);
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return 0;
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}
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|
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int ff_h264_decode_ref_pic_list_reordering(H264SliceContext *sl, void *logctx)
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{
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int list, index;
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sl->nb_ref_modifications[0] = 0;
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sl->nb_ref_modifications[1] = 0;
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for (list = 0; list < sl->list_count; list++) {
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if (!get_bits1(&sl->gb)) // ref_pic_list_modification_flag_l[01]
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continue;
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for (index = 0; ; index++) {
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unsigned int op = get_ue_golomb_31(&sl->gb);
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if (op == 3)
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break;
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if (index >= sl->ref_count[list]) {
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av_log(logctx, AV_LOG_ERROR, "reference count overflow\n");
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return AVERROR_INVALIDDATA;
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} else if (op > 2) {
|
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av_log(logctx, AV_LOG_ERROR,
|
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"illegal modification_of_pic_nums_idc %u\n",
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op);
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return AVERROR_INVALIDDATA;
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}
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sl->ref_modifications[list][index].val = get_ue_golomb_long(&sl->gb);
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sl->ref_modifications[list][index].op = op;
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sl->nb_ref_modifications[list]++;
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}
|
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}
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return 0;
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}
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|
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/**
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* Mark a picture as no longer needed for reference. The refmask
|
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* argument allows unreferencing of individual fields or the whole frame.
|
|
* If the picture becomes entirely unreferenced, but is being held for
|
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* display purposes, it is marked as such.
|
|
* @param refmask mask of fields to unreference; the mask is bitwise
|
|
* anded with the reference marking of pic
|
|
* @return non-zero if pic becomes entirely unreferenced (except possibly
|
|
* for display purposes) zero if one of the fields remains in
|
|
* reference
|
|
*/
|
|
static inline int unreference_pic(H264Context *h, H264Picture *pic, int refmask)
|
|
{
|
|
int i;
|
|
if (pic->reference &= refmask) {
|
|
return 0;
|
|
} else {
|
|
for(i = 0; h->delayed_pic[i]; i++)
|
|
if(pic == h->delayed_pic[i]){
|
|
pic->reference = DELAYED_PIC_REF;
|
|
break;
|
|
}
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Find a H264Picture in the short term reference list by frame number.
|
|
* @param frame_num frame number to search for
|
|
* @param idx the index into h->short_ref where returned picture is found
|
|
* undefined if no picture found.
|
|
* @return pointer to the found picture, or NULL if no pic with the provided
|
|
* frame number is found
|
|
*/
|
|
static H264Picture *find_short(H264Context *h, int frame_num, int *idx)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < h->short_ref_count; i++) {
|
|
H264Picture *pic = h->short_ref[i];
|
|
if (h->avctx->debug & FF_DEBUG_MMCO)
|
|
av_log(h->avctx, AV_LOG_DEBUG, "%d %d %p\n", i, pic->frame_num, pic);
|
|
if (pic->frame_num == frame_num) {
|
|
*idx = i;
|
|
return pic;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* Remove a picture from the short term reference list by its index in
|
|
* that list. This does no checking on the provided index; it is assumed
|
|
* to be valid. Other list entries are shifted down.
|
|
* @param i index into h->short_ref of picture to remove.
|
|
*/
|
|
static void remove_short_at_index(H264Context *h, int i)
|
|
{
|
|
assert(i >= 0 && i < h->short_ref_count);
|
|
h->short_ref[i] = NULL;
|
|
if (--h->short_ref_count)
|
|
memmove(&h->short_ref[i], &h->short_ref[i + 1],
|
|
(h->short_ref_count - i) * sizeof(H264Picture*));
|
|
}
|
|
|
|
/**
|
|
* @return the removed picture or NULL if an error occurs
|
|
*/
|
|
static H264Picture *remove_short(H264Context *h, int frame_num, int ref_mask)
|
|
{
|
|
H264Picture *pic;
|
|
int i;
|
|
|
|
if (h->avctx->debug & FF_DEBUG_MMCO)
|
|
av_log(h->avctx, AV_LOG_DEBUG, "remove short %d count %d\n", frame_num, h->short_ref_count);
|
|
|
|
pic = find_short(h, frame_num, &i);
|
|
if (pic) {
|
|
if (unreference_pic(h, pic, ref_mask))
|
|
remove_short_at_index(h, i);
|
|
}
|
|
|
|
return pic;
|
|
}
|
|
|
|
/**
|
|
* Remove a picture from the long term reference list by its index in
|
|
* that list.
|
|
* @return the removed picture or NULL if an error occurs
|
|
*/
|
|
static H264Picture *remove_long(H264Context *h, int i, int ref_mask)
|
|
{
|
|
H264Picture *pic;
|
|
|
|
pic = h->long_ref[i];
|
|
if (pic) {
|
|
if (unreference_pic(h, pic, ref_mask)) {
|
|
assert(h->long_ref[i]->long_ref == 1);
|
|
h->long_ref[i]->long_ref = 0;
|
|
h->long_ref[i] = NULL;
|
|
h->long_ref_count--;
|
|
}
|
|
}
|
|
|
|
return pic;
|
|
}
|
|
|
|
void ff_h264_remove_all_refs(H264Context *h)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
remove_long(h, i, 0);
|
|
}
|
|
assert(h->long_ref_count == 0);
|
|
|
|
if (h->short_ref_count && !h->last_pic_for_ec.f->data[0]) {
|
|
ff_h264_unref_picture(h, &h->last_pic_for_ec);
|
|
ff_h264_ref_picture(h, &h->last_pic_for_ec, h->short_ref[0]);
|
|
}
|
|
|
|
for (i = 0; i < h->short_ref_count; i++) {
|
|
unreference_pic(h, h->short_ref[i], 0);
|
|
h->short_ref[i] = NULL;
|
|
}
|
|
h->short_ref_count = 0;
|
|
|
|
memset(h->default_ref, 0, sizeof(h->default_ref));
|
|
}
|
|
|
|
static void generate_sliding_window_mmcos(H264Context *h)
|
|
{
|
|
MMCO *mmco = h->mmco;
|
|
int nb_mmco = 0;
|
|
|
|
if (h->short_ref_count &&
|
|
h->long_ref_count + h->short_ref_count >= h->ps.sps->ref_frame_count &&
|
|
!(FIELD_PICTURE(h) && !h->first_field && h->cur_pic_ptr->reference)) {
|
|
mmco[0].opcode = MMCO_SHORT2UNUSED;
|
|
mmco[0].short_pic_num = h->short_ref[h->short_ref_count - 1]->frame_num;
|
|
nb_mmco = 1;
|
|
if (FIELD_PICTURE(h)) {
|
|
mmco[0].short_pic_num *= 2;
|
|
mmco[1].opcode = MMCO_SHORT2UNUSED;
|
|
mmco[1].short_pic_num = mmco[0].short_pic_num + 1;
|
|
nb_mmco = 2;
|
|
}
|
|
}
|
|
|
|
h->nb_mmco = nb_mmco;
|
|
}
|
|
|
|
int ff_h264_execute_ref_pic_marking(H264Context *h)
|
|
{
|
|
MMCO *mmco = h->mmco;
|
|
int mmco_count;
|
|
int i, av_uninit(j);
|
|
int pps_ref_count[2] = {0};
|
|
int current_ref_assigned = 0, err = 0;
|
|
H264Picture *av_uninit(pic);
|
|
|
|
if (!h->ps.sps) {
|
|
av_log(h->avctx, AV_LOG_ERROR, "SPS is unset\n");
|
|
err = AVERROR_INVALIDDATA;
|
|
goto out;
|
|
}
|
|
|
|
if (!h->explicit_ref_marking)
|
|
generate_sliding_window_mmcos(h);
|
|
mmco_count = h->nb_mmco;
|
|
|
|
if ((h->avctx->debug & FF_DEBUG_MMCO) && mmco_count == 0)
|
|
av_log(h->avctx, AV_LOG_DEBUG, "no mmco here\n");
|
|
|
|
for (i = 0; i < mmco_count; i++) {
|
|
int av_uninit(structure), av_uninit(frame_num);
|
|
if (h->avctx->debug & FF_DEBUG_MMCO)
|
|
av_log(h->avctx, AV_LOG_DEBUG, "mmco:%d %d %d\n", h->mmco[i].opcode,
|
|
h->mmco[i].short_pic_num, h->mmco[i].long_arg);
|
|
|
|
if (mmco[i].opcode == MMCO_SHORT2UNUSED ||
|
|
mmco[i].opcode == MMCO_SHORT2LONG) {
|
|
frame_num = pic_num_extract(h, mmco[i].short_pic_num, &structure);
|
|
pic = find_short(h, frame_num, &j);
|
|
if (!pic) {
|
|
if (mmco[i].opcode != MMCO_SHORT2LONG ||
|
|
!h->long_ref[mmco[i].long_arg] ||
|
|
h->long_ref[mmco[i].long_arg]->frame_num != frame_num) {
|
|
av_log(h->avctx, h->short_ref_count ? AV_LOG_ERROR : AV_LOG_DEBUG, "mmco: unref short failure\n");
|
|
err = AVERROR_INVALIDDATA;
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
|
|
switch (mmco[i].opcode) {
|
|
case MMCO_SHORT2UNUSED:
|
|
if (h->avctx->debug & FF_DEBUG_MMCO)
|
|
av_log(h->avctx, AV_LOG_DEBUG, "mmco: unref short %d count %d\n",
|
|
h->mmco[i].short_pic_num, h->short_ref_count);
|
|
remove_short(h, frame_num, structure ^ PICT_FRAME);
|
|
break;
|
|
case MMCO_SHORT2LONG:
|
|
if (h->long_ref[mmco[i].long_arg] != pic)
|
|
remove_long(h, mmco[i].long_arg, 0);
|
|
|
|
remove_short_at_index(h, j);
|
|
h->long_ref[ mmco[i].long_arg ] = pic;
|
|
if (h->long_ref[mmco[i].long_arg]) {
|
|
h->long_ref[mmco[i].long_arg]->long_ref = 1;
|
|
h->long_ref_count++;
|
|
}
|
|
break;
|
|
case MMCO_LONG2UNUSED:
|
|
j = pic_num_extract(h, mmco[i].long_arg, &structure);
|
|
pic = h->long_ref[j];
|
|
if (pic) {
|
|
remove_long(h, j, structure ^ PICT_FRAME);
|
|
} else if (h->avctx->debug & FF_DEBUG_MMCO)
|
|
av_log(h->avctx, AV_LOG_DEBUG, "mmco: unref long failure\n");
|
|
break;
|
|
case MMCO_LONG:
|
|
// Comment below left from previous code as it is an interesting note.
|
|
/* First field in pair is in short term list or
|
|
* at a different long term index.
|
|
* This is not allowed; see 7.4.3.3, notes 2 and 3.
|
|
* Report the problem and keep the pair where it is,
|
|
* and mark this field valid.
|
|
*/
|
|
if (h->short_ref[0] == h->cur_pic_ptr) {
|
|
av_log(h->avctx, AV_LOG_ERROR, "mmco: cannot assign current picture to short and long at the same time\n");
|
|
remove_short_at_index(h, 0);
|
|
}
|
|
|
|
/* make sure the current picture is not already assigned as a long ref */
|
|
if (h->cur_pic_ptr->long_ref) {
|
|
for (j = 0; j < FF_ARRAY_ELEMS(h->long_ref); j++) {
|
|
if (h->long_ref[j] == h->cur_pic_ptr) {
|
|
if (j != mmco[i].long_arg)
|
|
av_log(h->avctx, AV_LOG_ERROR, "mmco: cannot assign current picture to 2 long term references\n");
|
|
remove_long(h, j, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (h->long_ref[mmco[i].long_arg] != h->cur_pic_ptr) {
|
|
av_assert0(!h->cur_pic_ptr->long_ref);
|
|
remove_long(h, mmco[i].long_arg, 0);
|
|
|
|
h->long_ref[mmco[i].long_arg] = h->cur_pic_ptr;
|
|
h->long_ref[mmco[i].long_arg]->long_ref = 1;
|
|
h->long_ref_count++;
|
|
}
|
|
|
|
h->cur_pic_ptr->reference |= h->picture_structure;
|
|
current_ref_assigned = 1;
|
|
break;
|
|
case MMCO_SET_MAX_LONG:
|
|
assert(mmco[i].long_arg <= 16);
|
|
// just remove the long term which index is greater than new max
|
|
for (j = mmco[i].long_arg; j < 16; j++) {
|
|
remove_long(h, j, 0);
|
|
}
|
|
break;
|
|
case MMCO_RESET:
|
|
while (h->short_ref_count) {
|
|
remove_short(h, h->short_ref[0]->frame_num, 0);
|
|
}
|
|
for (j = 0; j < 16; j++) {
|
|
remove_long(h, j, 0);
|
|
}
|
|
h->poc.frame_num = h->cur_pic_ptr->frame_num = 0;
|
|
h->mmco_reset = 1;
|
|
h->cur_pic_ptr->mmco_reset = 1;
|
|
for (j = 0; j < MAX_DELAYED_PIC_COUNT; j++)
|
|
h->last_pocs[j] = INT_MIN;
|
|
break;
|
|
default: av_assert0(0);
|
|
}
|
|
}
|
|
|
|
if (!current_ref_assigned) {
|
|
/* Second field of complementary field pair; the first field of
|
|
* which is already referenced. If short referenced, it
|
|
* should be first entry in short_ref. If not, it must exist
|
|
* in long_ref; trying to put it on the short list here is an
|
|
* error in the encoded bit stream (ref: 7.4.3.3, NOTE 2 and 3).
|
|
*/
|
|
if (h->short_ref_count && h->short_ref[0] == h->cur_pic_ptr) {
|
|
/* Just mark the second field valid */
|
|
h->cur_pic_ptr->reference |= h->picture_structure;
|
|
} else if (h->cur_pic_ptr->long_ref) {
|
|
av_log(h->avctx, AV_LOG_ERROR, "illegal short term reference "
|
|
"assignment for second field "
|
|
"in complementary field pair "
|
|
"(first field is long term)\n");
|
|
err = AVERROR_INVALIDDATA;
|
|
} else {
|
|
pic = remove_short(h, h->cur_pic_ptr->frame_num, 0);
|
|
if (pic) {
|
|
av_log(h->avctx, AV_LOG_ERROR, "illegal short term buffer state detected\n");
|
|
err = AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (h->short_ref_count)
|
|
memmove(&h->short_ref[1], &h->short_ref[0],
|
|
h->short_ref_count * sizeof(H264Picture*));
|
|
|
|
h->short_ref[0] = h->cur_pic_ptr;
|
|
h->short_ref_count++;
|
|
h->cur_pic_ptr->reference |= h->picture_structure;
|
|
}
|
|
}
|
|
|
|
if (h->long_ref_count + h->short_ref_count > FFMAX(h->ps.sps->ref_frame_count, 1)) {
|
|
|
|
/* We have too many reference frames, probably due to corrupted
|
|
* stream. Need to discard one frame. Prevents overrun of the
|
|
* short_ref and long_ref buffers.
|
|
*/
|
|
av_log(h->avctx, AV_LOG_ERROR,
|
|
"number of reference frames (%d+%d) exceeds max (%d; probably "
|
|
"corrupt input), discarding one\n",
|
|
h->long_ref_count, h->short_ref_count, h->ps.sps->ref_frame_count);
|
|
err = AVERROR_INVALIDDATA;
|
|
|
|
if (h->long_ref_count && !h->short_ref_count) {
|
|
for (i = 0; i < 16; ++i)
|
|
if (h->long_ref[i])
|
|
break;
|
|
|
|
assert(i < 16);
|
|
remove_long(h, i, 0);
|
|
} else {
|
|
pic = h->short_ref[h->short_ref_count - 1];
|
|
remove_short(h, pic->frame_num, 0);
|
|
}
|
|
}
|
|
|
|
for (i = 0; i<h->short_ref_count; i++) {
|
|
pic = h->short_ref[i];
|
|
if (pic->invalid_gap) {
|
|
int d = av_mod_uintp2(h->cur_pic_ptr->frame_num - pic->frame_num, h->ps.sps->log2_max_frame_num);
|
|
if (d > h->ps.sps->ref_frame_count)
|
|
remove_short(h, pic->frame_num, 0);
|
|
}
|
|
}
|
|
|
|
print_short_term(h);
|
|
print_long_term(h);
|
|
|
|
for (i = 0; i < FF_ARRAY_ELEMS(h->ps.pps_list); i++) {
|
|
if (h->ps.pps_list[i]) {
|
|
const PPS *pps = (const PPS *)h->ps.pps_list[i]->data;
|
|
pps_ref_count[0] = FFMAX(pps_ref_count[0], pps->ref_count[0]);
|
|
pps_ref_count[1] = FFMAX(pps_ref_count[1], pps->ref_count[1]);
|
|
}
|
|
}
|
|
|
|
// Detect unmarked random access points
|
|
if ( err >= 0
|
|
&& h->long_ref_count==0
|
|
&& ( h->short_ref_count<=2
|
|
|| pps_ref_count[0] <= 2 && pps_ref_count[1] <= 1 && h->avctx->has_b_frames
|
|
|| pps_ref_count[0] <= 1 + (h->picture_structure != PICT_FRAME) && pps_ref_count[1] <= 1)
|
|
&& pps_ref_count[0]<=2 + (h->picture_structure != PICT_FRAME) + (2*!h->has_recovery_point)
|
|
&& h->cur_pic_ptr->f->pict_type == AV_PICTURE_TYPE_I){
|
|
h->cur_pic_ptr->recovered |= 1;
|
|
if(!h->avctx->has_b_frames)
|
|
h->frame_recovered |= FRAME_RECOVERED_SEI;
|
|
}
|
|
|
|
out:
|
|
return (h->avctx->err_recognition & AV_EF_EXPLODE) ? err : 0;
|
|
}
|
|
|
|
int ff_h264_decode_ref_pic_marking(H264SliceContext *sl, GetBitContext *gb,
|
|
const H2645NAL *nal, void *logctx)
|
|
{
|
|
int i;
|
|
MMCO *mmco = sl->mmco;
|
|
int nb_mmco = 0;
|
|
|
|
if (nal->type == H264_NAL_IDR_SLICE) { // FIXME fields
|
|
skip_bits1(gb); // broken_link
|
|
if (get_bits1(gb)) {
|
|
mmco[0].opcode = MMCO_LONG;
|
|
mmco[0].long_arg = 0;
|
|
nb_mmco = 1;
|
|
}
|
|
sl->explicit_ref_marking = 1;
|
|
} else {
|
|
sl->explicit_ref_marking = get_bits1(gb);
|
|
if (sl->explicit_ref_marking) {
|
|
for (i = 0; i < MAX_MMCO_COUNT; i++) {
|
|
MMCOOpcode opcode = get_ue_golomb_31(gb);
|
|
|
|
mmco[i].opcode = opcode;
|
|
if (opcode == MMCO_SHORT2UNUSED || opcode == MMCO_SHORT2LONG) {
|
|
mmco[i].short_pic_num =
|
|
(sl->curr_pic_num - get_ue_golomb_long(gb) - 1) &
|
|
(sl->max_pic_num - 1);
|
|
}
|
|
if (opcode == MMCO_SHORT2LONG || opcode == MMCO_LONG2UNUSED ||
|
|
opcode == MMCO_LONG || opcode == MMCO_SET_MAX_LONG) {
|
|
unsigned int long_arg = get_ue_golomb_31(gb);
|
|
if (long_arg >= 32 ||
|
|
(long_arg >= 16 && !(opcode == MMCO_SET_MAX_LONG &&
|
|
long_arg == 16) &&
|
|
!(opcode == MMCO_LONG2UNUSED && FIELD_PICTURE(sl)))) {
|
|
av_log(logctx, AV_LOG_ERROR,
|
|
"illegal long ref in memory management control "
|
|
"operation %d\n", opcode);
|
|
sl->nb_mmco = i;
|
|
return -1;
|
|
}
|
|
mmco[i].long_arg = long_arg;
|
|
}
|
|
|
|
if (opcode > (unsigned) MMCO_LONG) {
|
|
av_log(logctx, AV_LOG_ERROR,
|
|
"illegal memory management control operation %d\n",
|
|
opcode);
|
|
sl->nb_mmco = i;
|
|
return -1;
|
|
}
|
|
if (opcode == MMCO_END)
|
|
break;
|
|
}
|
|
nb_mmco = i;
|
|
}
|
|
}
|
|
|
|
sl->nb_mmco = nb_mmco;
|
|
|
|
return 0;
|
|
}
|