| /* |
| * 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) { |
| av_log(h->avctx, AV_LOG_ERROR, |
| "reference picture missing during reorder\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: assert(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); |
| 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); |
| return -1; |
| } |
| if (opcode == MMCO_END) |
| break; |
| } |
| nb_mmco = i; |
| } |
| } |
| |
| sl->nb_mmco = nb_mmco; |
| |
| return 0; |
| } |
