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| /* | |
| * H.26L/H.264/AVC/JVT/14496-10/... reference picture handling | |
| * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> | |
| * | |
| * This file is part of FFmpeg. | |
| * | |
| * FFmpeg is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU Lesser General Public | |
| * License as published by the Free Software Foundation; either | |
| * version 2.1 of the License, or (at your option) any later version. | |
| * | |
| * FFmpeg is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| * Lesser General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU Lesser General Public | |
| * License along with FFmpeg; if not, write to the Free Software | |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| */ | |
| /** | |
| * @file | |
| * H.264 / AVC / MPEG-4 part10 reference picture handling. | |
| * @author Michael Niedermayer <michaelni@gmx.at> | |
| */ | |
| #include <inttypes.h> | |
| #include "libavutil/avassert.h" | |
| #include "internal.h" | |
| #include "avcodec.h" | |
| #include "h264.h" | |
| #include "h264dec.h" | |
| #include "golomb.h" | |
| #include "mpegutils.h" | |
| #include <assert.h> | |
| static void pic_as_field(H264Ref *pic, const int parity) | |
| { | |
| int i; | |
| for (i = 0; i < FF_ARRAY_ELEMS(pic->data); ++i) { | |
| if (parity == PICT_BOTTOM_FIELD) | |
| pic->data[i] += pic->linesize[i]; | |
| pic->reference = parity; | |
| pic->linesize[i] *= 2; | |
| } | |
| pic->poc = pic->parent->field_poc[parity == PICT_BOTTOM_FIELD]; | |
| } | |
| static void ref_from_h264pic(H264Ref *dst, H264Picture *src) | |
| { | |
| memcpy(dst->data, src->f->data, sizeof(dst->data)); | |
| memcpy(dst->linesize, src->f->linesize, sizeof(dst->linesize)); | |
| dst->reference = src->reference; | |
| dst->poc = src->poc; | |
| dst->pic_id = src->pic_id; | |
| dst->parent = src; | |
| } | |
| static int split_field_copy(H264Ref *dest, H264Picture *src, int parity, int id_add) | |
| { | |
| int match = !!(src->reference & parity); | |
| if (match) { | |
| ref_from_h264pic(dest, src); | |
| if (parity != PICT_FRAME) { | |
| pic_as_field(dest, parity); | |
| dest->pic_id *= 2; | |
| dest->pic_id += id_add; | |
| } | |
| } | |
| return match; | |
| } | |
| static int build_def_list(H264Ref *def, int def_len, | |
| H264Picture * const *in, int len, int is_long, int sel) | |
| { | |
| int i[2] = { 0 }; | |
| int index = 0; | |
| while (i[0] < len || i[1] < len) { | |
| while (i[0] < len && !(in[i[0]] && (in[i[0]]->reference & sel))) | |
| i[0]++; | |
| while (i[1] < len && !(in[i[1]] && (in[i[1]]->reference & (sel ^ 3)))) | |
| i[1]++; | |
| if (i[0] < len) { | |
| av_assert0(index < def_len); | |
| in[i[0]]->pic_id = is_long ? i[0] : in[i[0]]->frame_num; | |
| split_field_copy(&def[index++], in[i[0]++], sel, 1); | |
| } | |
| if (i[1] < len) { | |
| av_assert0(index < def_len); | |
| in[i[1]]->pic_id = is_long ? i[1] : in[i[1]]->frame_num; | |
| split_field_copy(&def[index++], in[i[1]++], sel ^ 3, 0); | |
| } | |
| } | |
| return index; | |
| } | |
| static int add_sorted(H264Picture **sorted, H264Picture * const *src, | |
| int len, int limit, int dir) | |
| { | |
| int i, best_poc; | |
| int out_i = 0; | |
| for (;;) { | |
| best_poc = dir ? INT_MIN : INT_MAX; | |
| for (i = 0; i < len; i++) { | |
| const int poc = src[i]->poc; | |
| if (((poc > limit) ^ dir) && ((poc < best_poc) ^ dir)) { | |
| best_poc = poc; | |
| sorted[out_i] = src[i]; | |
| } | |
| } | |
| if (best_poc == (dir ? INT_MIN : INT_MAX)) | |
| break; | |
| limit = sorted[out_i++]->poc - dir; | |
| } | |
| return out_i; | |
| } | |
| static int mismatches_ref(const H264Context *h, const H264Picture *pic) | |
| { | |
| const AVFrame *f = pic->f; | |
| return (h->cur_pic_ptr->f->width != f->width || | |
| h->cur_pic_ptr->f->height != f->height || | |
| h->cur_pic_ptr->f->format != f->format); | |
| } | |
| static void h264_initialise_ref_list(H264Context *h, H264SliceContext *sl) | |
| { | |
| int i, len; | |
| int j; | |
| if (sl->slice_type_nos == AV_PICTURE_TYPE_B) { | |
| H264Picture *sorted[32]; | |
| int cur_poc, list; | |
| int lens[2]; | |
| if (FIELD_PICTURE(h)) | |
| cur_poc = h->cur_pic_ptr->field_poc[h->picture_structure == PICT_BOTTOM_FIELD]; | |
| else | |
| cur_poc = h->cur_pic_ptr->poc; | |
| for (list = 0; list < 2; list++) { | |
| len = add_sorted(sorted, h->short_ref, h->short_ref_count, cur_poc, 1 ^ list); | |
| len += add_sorted(sorted + len, h->short_ref, h->short_ref_count, cur_poc, 0 ^ list); | |
| av_assert0(len <= 32); | |
| len = build_def_list(sl->ref_list[list], FF_ARRAY_ELEMS(sl->ref_list[0]), | |
| sorted, len, 0, h->picture_structure); | |
| len += build_def_list(sl->ref_list[list] + len, | |
| FF_ARRAY_ELEMS(sl->ref_list[0]) - len, | |
| h->long_ref, 16, 1, h->picture_structure); | |
| av_assert0(len <= 32); | |
| if (len < sl->ref_count[list]) | |
| memset(&sl->ref_list[list][len], 0, sizeof(H264Ref) * (sl->ref_count[list] - len)); | |
| lens[list] = len; | |
| } | |
| if (lens[0] == lens[1] && lens[1] > 1) { | |
| for (i = 0; i < lens[0] && | |
| sl->ref_list[0][i].parent->f->buf[0]->buffer == | |
| sl->ref_list[1][i].parent->f->buf[0]->buffer; i++); | |
| if (i == lens[0]) { | |
| FFSWAP(H264Ref, sl->ref_list[1][0], sl->ref_list[1][1]); | |
| } | |
| } | |
| } else { | |
| len = build_def_list(sl->ref_list[0], FF_ARRAY_ELEMS(sl->ref_list[0]), | |
| h->short_ref, h->short_ref_count, 0, h->picture_structure); | |
| len += build_def_list(sl->ref_list[0] + len, | |
| FF_ARRAY_ELEMS(sl->ref_list[0]) - len, | |
| h-> long_ref, 16, 1, h->picture_structure); | |
| av_assert0(len <= 32); | |
| if (len < sl->ref_count[0]) | |
| memset(&sl->ref_list[0][len], 0, sizeof(H264Ref) * (sl->ref_count[0] - len)); | |
| } | |
| #ifdef TRACE | |
| for (i = 0; i < sl->ref_count[0]; i++) { | |
| ff_tlog(h->avctx, "List0: %s fn:%d 0x%p\n", | |
| (sl->ref_list[0][i].parent ? (sl->ref_list[0][i].parent->long_ref ? "LT" : "ST") : "??"), | |
| sl->ref_list[0][i].pic_id, | |
| sl->ref_list[0][i].data[0]); | |
| } | |
| if (sl->slice_type_nos == AV_PICTURE_TYPE_B) { | |
| for (i = 0; i < sl->ref_count[1]; i++) { | |
| ff_tlog(h->avctx, "List1: %s fn:%d 0x%p\n", | |
| (sl->ref_list[1][i].parent ? (sl->ref_list[1][i].parent->long_ref ? "LT" : "ST") : "??"), | |
| sl->ref_list[1][i].pic_id, | |
| sl->ref_list[1][i].data[0]); | |
| } | |
| } | |
| #endif | |
| for (j = 0; j<1+(sl->slice_type_nos == AV_PICTURE_TYPE_B); j++) { | |
| for (i = 0; i < sl->ref_count[j]; i++) { | |
| if (sl->ref_list[j][i].parent) { | |
| if (mismatches_ref(h, sl->ref_list[j][i].parent)) { | |
| av_log(h->avctx, AV_LOG_ERROR, "Discarding mismatching reference\n"); | |
| memset(&sl->ref_list[j][i], 0, sizeof(sl->ref_list[j][i])); | |
| } | |
| } | |
| } | |
| } | |
| for (i = 0; i < sl->list_count; i++) | |
| h->default_ref[i] = sl->ref_list[i][0]; | |
| } | |
| /** | |
| * print short term list | |
| */ | |
| static void print_short_term(const H264Context *h) | |
| { | |
| uint32_t i; | |
| if (h->avctx->debug & FF_DEBUG_MMCO) { | |
| av_log(h->avctx, AV_LOG_DEBUG, "short term list:\n"); | |
| for (i = 0; i < h->short_ref_count; i++) { | |
| H264Picture *pic = h->short_ref[i]; | |
| av_log(h->avctx, AV_LOG_DEBUG, "%"PRIu32" fn:%d poc:%d %p\n", | |
| i, pic->frame_num, pic->poc, pic->f->data[0]); | |
| } | |
| } | |
| } | |
| /** | |
| * print long term list | |
| */ | |
| static void print_long_term(const H264Context *h) | |
| { | |
| uint32_t i; | |
| if (h->avctx->debug & FF_DEBUG_MMCO) { | |
| av_log(h->avctx, AV_LOG_DEBUG, "long term list:\n"); | |
| for (i = 0; i < 16; i++) { | |
| H264Picture *pic = h->long_ref[i]; | |
| if (pic) { | |
| av_log(h->avctx, AV_LOG_DEBUG, "%"PRIu32" fn:%d poc:%d %p\n", | |
| i, pic->frame_num, pic->poc, pic->f->data[0]); | |
| } | |
| } | |
| } | |
| } | |
| /** | |
| * Extract structure information about the picture described by pic_num in | |
| * the current decoding context (frame or field). Note that pic_num is | |
| * picture number without wrapping (so, 0<=pic_num<max_pic_num). | |
| * @param pic_num picture number for which to extract structure information | |
| * @param structure one of PICT_XXX describing structure of picture | |
| * with pic_num | |
| * @return frame number (short term) or long term index of picture | |
| * described by pic_num | |
| */ | |
| static int pic_num_extract(const H264Context *h, int pic_num, int *structure) | |
| { | |
| *structure = h->picture_structure; | |
| if (FIELD_PICTURE(h)) { | |
| if (!(pic_num & 1)) | |
| /* opposite field */ | |
| *structure ^= PICT_FRAME; | |
| pic_num >>= 1; | |
| } | |
| return pic_num; | |
| } | |
| static void h264_fill_mbaff_ref_list(H264SliceContext *sl) | |
| { | |
| int list, i, j; | |
| for (list = 0; list < sl->list_count; list++) { | |
| for (i = 0; i < sl->ref_count[list]; i++) { | |
| H264Ref *frame = &sl->ref_list[list][i]; | |
| H264Ref *field = &sl->ref_list[list][16 + 2 * i]; | |
| field[0] = *frame; | |
| for (j = 0; j < 3; j++) | |
| field[0].linesize[j] <<= 1; | |
| field[0].reference = PICT_TOP_FIELD; | |
| field[0].poc = field[0].parent->field_poc[0]; | |
| field[1] = field[0]; | |
| for (j = 0; j < 3; j++) | |
| field[1].data[j] += frame->parent->f->linesize[j]; | |
| field[1].reference = PICT_BOTTOM_FIELD; | |
| field[1].poc = field[1].parent->field_poc[1]; | |
| } | |
| } | |
| } | |
| int ff_h264_build_ref_list(H264Context *h, H264SliceContext *sl) | |
| { | |
| int list, index, pic_structure; | |
| print_short_term(h); | |
| print_long_term(h); | |
| h264_initialise_ref_list(h, sl); | |
| for (list = 0; list < sl->list_count; list++) { | |
| int pred = sl->curr_pic_num; | |
| for (index = 0; index < sl->nb_ref_modifications[list]; index++) { | |
| unsigned int modification_of_pic_nums_idc = sl->ref_modifications[list][index].op; | |
| unsigned int val = sl->ref_modifications[list][index].val; | |
| unsigned int pic_id; | |
| int i; | |
| H264Picture *ref = NULL; | |
| switch (modification_of_pic_nums_idc) { | |
| case 0: | |
| case 1: { | |
| const unsigned int abs_diff_pic_num = val + 1; | |
| int frame_num; | |
| if (abs_diff_pic_num > sl->max_pic_num) { | |
| av_log(h->avctx, AV_LOG_ERROR, | |
| "abs_diff_pic_num overflow\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| if (modification_of_pic_nums_idc == 0) | |
| pred -= abs_diff_pic_num; | |
| else | |
| pred += abs_diff_pic_num; | |
| pred &= sl->max_pic_num - 1; | |
| frame_num = pic_num_extract(h, pred, &pic_structure); | |
| for (i = h->short_ref_count - 1; i >= 0; i--) { | |
| ref = h->short_ref[i]; | |
| assert(ref->reference); | |
| assert(!ref->long_ref); | |
| if (ref->frame_num == frame_num && | |
| (ref->reference & pic_structure)) | |
| break; | |
| } | |
| if (i >= 0) | |
| ref->pic_id = pred; | |
| break; | |
| } | |
| case 2: { | |
| int long_idx; | |
| pic_id = val; // long_term_pic_idx | |
| long_idx = pic_num_extract(h, pic_id, &pic_structure); | |
| if (long_idx > 31U) { | |
| av_log(h->avctx, AV_LOG_ERROR, | |
| "long_term_pic_idx overflow\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| ref = h->long_ref[long_idx]; | |
| assert(!(ref && !ref->reference)); | |
| if (ref && (ref->reference & pic_structure)) { | |
| ref->pic_id = pic_id; | |
| assert(ref->long_ref); | |
| i = 0; | |
| } else { | |
| i = -1; | |
| } | |
| break; | |
| } | |
| default: | |
| av_assert0(0); | |
| } | |
| if (i < 0 || mismatches_ref(h, ref)) { | |
| av_log(h->avctx, AV_LOG_ERROR, | |
| i < 0 ? "reference picture missing during reorder\n" : | |
| "mismatching reference\n" | |
| ); | |
| memset(&sl->ref_list[list][index], 0, sizeof(sl->ref_list[0][0])); // FIXME | |
| } else { | |
| for (i = index; i + 1 < sl->ref_count[list]; i++) { | |
| if (sl->ref_list[list][i].parent && | |
| ref->long_ref == sl->ref_list[list][i].parent->long_ref && | |
| ref->pic_id == sl->ref_list[list][i].pic_id) | |
| break; | |
| } | |
| for (; i > index; i--) { | |
| sl->ref_list[list][i] = sl->ref_list[list][i - 1]; | |
| } | |
| ref_from_h264pic(&sl->ref_list[list][index], ref); | |
| if (FIELD_PICTURE(h)) { | |
| pic_as_field(&sl->ref_list[list][index], pic_structure); | |
| } | |
| } | |
| } | |
| } | |
| for (list = 0; list < sl->list_count; list++) { | |
| for (index = 0; index < sl->ref_count[list]; index++) { | |
| if ( !sl->ref_list[list][index].parent | |
| || (!FIELD_PICTURE(h) && (sl->ref_list[list][index].reference&3) != 3)) { | |
| int i; | |
| av_log(h->avctx, AV_LOG_ERROR, "Missing reference picture, default is %d\n", h->default_ref[list].poc); | |
| for (i = 0; i < FF_ARRAY_ELEMS(h->last_pocs); i++) | |
| h->last_pocs[i] = INT_MIN; | |
| if (h->default_ref[list].parent | |
| && !(!FIELD_PICTURE(h) && (h->default_ref[list].reference&3) != 3)) | |
| sl->ref_list[list][index] = h->default_ref[list]; | |
| else | |
| return -1; | |
| } | |
| av_assert0(av_buffer_get_ref_count(sl->ref_list[list][index].parent->f->buf[0]) > 0); | |
| } | |
| } | |
| if (FRAME_MBAFF(h)) | |
| h264_fill_mbaff_ref_list(sl); | |
| return 0; | |
| } | |
| int ff_h264_decode_ref_pic_list_reordering(H264SliceContext *sl, void *logctx) | |
| { | |
| int list, index; | |
| sl->nb_ref_modifications[0] = 0; | |
| sl->nb_ref_modifications[1] = 0; | |
| for (list = 0; list < sl->list_count; list++) { | |
| if (!get_bits1(&sl->gb)) // ref_pic_list_modification_flag_l[01] | |
| continue; | |
| for (index = 0; ; index++) { | |
| unsigned int op = get_ue_golomb_31(&sl->gb); | |
| if (op == 3) | |
| break; | |
| if (index >= sl->ref_count[list]) { | |
| av_log(logctx, AV_LOG_ERROR, "reference count overflow\n"); | |
| return AVERROR_INVALIDDATA; | |
| } else if (op > 2) { | |
| av_log(logctx, AV_LOG_ERROR, | |
| "illegal modification_of_pic_nums_idc %u\n", | |
| op); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| sl->ref_modifications[list][index].val = get_ue_golomb_long(&sl->gb); | |
| sl->ref_modifications[list][index].op = op; | |
| sl->nb_ref_modifications[list]++; | |
| } | |
| } | |
| return 0; | |
| } | |
| /** | |
| * Mark a picture as no longer needed for reference. The refmask | |
| * argument allows unreferencing of individual fields or the whole frame. | |
| * If the picture becomes entirely unreferenced, but is being held for | |
| * 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; | |
| } |