yading@10: /* yading@10: * H.26L/H.264/AVC/JVT/14496-10/... reference picture handling yading@10: * Copyright (c) 2003 Michael Niedermayer yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: /** yading@10: * @file yading@10: * H.264 / AVC / MPEG4 part10 reference picture handling. yading@10: * @author Michael Niedermayer yading@10: */ yading@10: yading@10: #include "libavutil/avassert.h" yading@10: #include "internal.h" yading@10: #include "avcodec.h" yading@10: #include "h264.h" yading@10: #include "golomb.h" yading@10: yading@10: //#undef NDEBUG yading@10: #include yading@10: yading@10: #define COPY_PICTURE(dst, src) \ yading@10: do {\ yading@10: *(dst) = *(src);\ yading@10: (dst)->f.extended_data = (dst)->f.data;\ yading@10: (dst)->tf.f = &(dst)->f;\ yading@10: } while (0) yading@10: yading@10: yading@10: static void pic_as_field(Picture *pic, const int parity){ yading@10: int i; yading@10: for (i = 0; i < 4; ++i) { yading@10: if (parity == PICT_BOTTOM_FIELD) yading@10: pic->f.data[i] += pic->f.linesize[i]; yading@10: pic->reference = parity; yading@10: pic->f.linesize[i] *= 2; yading@10: } yading@10: pic->poc= pic->field_poc[parity == PICT_BOTTOM_FIELD]; yading@10: } yading@10: yading@10: static int split_field_copy(Picture *dest, Picture *src, int parity, int id_add) yading@10: { yading@10: int match = !!(src->reference & parity); yading@10: yading@10: if (match) { yading@10: COPY_PICTURE(dest, src); yading@10: if (parity != PICT_FRAME) { yading@10: pic_as_field(dest, parity); yading@10: dest->pic_id *= 2; yading@10: dest->pic_id += id_add; yading@10: } yading@10: } yading@10: yading@10: return match; yading@10: } yading@10: yading@10: static int build_def_list(Picture *def, Picture **in, int len, int is_long, int sel) yading@10: { yading@10: int i[2] = { 0 }; yading@10: int index = 0; yading@10: yading@10: while (i[0] < len || i[1] < len) { yading@10: while (i[0] < len && !(in[i[0]] && (in[i[0]]->reference & sel))) yading@10: i[0]++; yading@10: while (i[1] < len && !(in[i[1]] && (in[i[1]]->reference & (sel ^ 3)))) yading@10: i[1]++; yading@10: if (i[0] < len) { yading@10: in[i[0]]->pic_id = is_long ? i[0] : in[i[0]]->frame_num; yading@10: split_field_copy(&def[index++], in[i[0]++], sel, 1); yading@10: } yading@10: if (i[1] < len) { yading@10: in[i[1]]->pic_id = is_long ? i[1] : in[i[1]]->frame_num; yading@10: split_field_copy(&def[index++], in[i[1]++], sel ^ 3, 0); yading@10: } yading@10: } yading@10: yading@10: return index; yading@10: } yading@10: yading@10: static int add_sorted(Picture **sorted, Picture **src, int len, int limit, int dir) yading@10: { yading@10: int i, best_poc; yading@10: int out_i = 0; yading@10: yading@10: for (;;) { yading@10: best_poc = dir ? INT_MIN : INT_MAX; yading@10: yading@10: for (i = 0; i < len; i++) { yading@10: const int poc = src[i]->poc; yading@10: if (((poc > limit) ^ dir) && ((poc < best_poc) ^ dir)) { yading@10: best_poc = poc; yading@10: sorted[out_i] = src[i]; yading@10: } yading@10: } yading@10: if (best_poc == (dir ? INT_MIN : INT_MAX)) yading@10: break; yading@10: limit = sorted[out_i++]->poc - dir; yading@10: } yading@10: return out_i; yading@10: } yading@10: yading@10: int ff_h264_fill_default_ref_list(H264Context *h) yading@10: { yading@10: int i, len; yading@10: yading@10: if (h->slice_type_nos == AV_PICTURE_TYPE_B) { yading@10: Picture *sorted[32]; yading@10: int cur_poc, list; yading@10: int lens[2]; yading@10: yading@10: if (FIELD_PICTURE(h)) yading@10: cur_poc = h->cur_pic_ptr->field_poc[h->picture_structure == PICT_BOTTOM_FIELD]; yading@10: else yading@10: cur_poc = h->cur_pic_ptr->poc; yading@10: yading@10: for (list = 0; list < 2; list++) { yading@10: len = add_sorted(sorted, h->short_ref, h->short_ref_count, cur_poc, 1 ^ list); yading@10: len += add_sorted(sorted + len, h->short_ref, h->short_ref_count, cur_poc, 0 ^ list); yading@10: av_assert0(len <= 32); yading@10: len = build_def_list(h->default_ref_list[list], sorted, len, 0, h->picture_structure); yading@10: len += build_def_list(h->default_ref_list[list] + len, h->long_ref, 16, 1, h->picture_structure); yading@10: av_assert0(len <= 32); yading@10: yading@10: if (len < h->ref_count[list]) yading@10: memset(&h->default_ref_list[list][len], 0, sizeof(Picture) * (h->ref_count[list] - len)); yading@10: lens[list] = len; yading@10: } yading@10: yading@10: if (lens[0] == lens[1] && lens[1] > 1) { yading@10: for (i = 0; h->default_ref_list[0][i].f.data[0] == h->default_ref_list[1][i].f.data[0] && i < lens[0]; i++); yading@10: if (i == lens[0]) { yading@10: Picture tmp; yading@10: COPY_PICTURE(&tmp, &h->default_ref_list[1][0]); yading@10: COPY_PICTURE(&h->default_ref_list[1][0], &h->default_ref_list[1][1]); yading@10: COPY_PICTURE(&h->default_ref_list[1][1], &tmp); yading@10: } yading@10: } yading@10: } else { yading@10: len = build_def_list(h->default_ref_list[0], h->short_ref, h->short_ref_count, 0, h->picture_structure); yading@10: len += build_def_list(h->default_ref_list[0] + len, h-> long_ref, 16, 1, h->picture_structure); yading@10: av_assert0(len <= 32); yading@10: if (len < h->ref_count[0]) yading@10: memset(&h->default_ref_list[0][len], 0, sizeof(Picture) * (h->ref_count[0] - len)); yading@10: } yading@10: #ifdef TRACE yading@10: for (i = 0; i < h->ref_count[0]; i++) { yading@10: tprintf(h->avctx, "List0: %s fn:%d 0x%p\n", yading@10: (h->default_ref_list[0][i].long_ref ? "LT" : "ST"), yading@10: h->default_ref_list[0][i].pic_id, yading@10: h->default_ref_list[0][i].f.data[0]); yading@10: } yading@10: if (h->slice_type_nos == AV_PICTURE_TYPE_B) { yading@10: for (i = 0; i < h->ref_count[1]; i++) { yading@10: tprintf(h->avctx, "List1: %s fn:%d 0x%p\n", yading@10: (h->default_ref_list[1][i].long_ref ? "LT" : "ST"), yading@10: h->default_ref_list[1][i].pic_id, yading@10: h->default_ref_list[1][i].f.data[0]); yading@10: } yading@10: } yading@10: #endif yading@10: return 0; yading@10: } yading@10: yading@10: static void print_short_term(H264Context *h); yading@10: static void print_long_term(H264Context *h); yading@10: yading@10: /** yading@10: * Extract structure information about the picture described by pic_num in yading@10: * the current decoding context (frame or field). Note that pic_num is yading@10: * picture number without wrapping (so, 0<=pic_numpicture_structure; yading@10: if (FIELD_PICTURE(h)) { yading@10: if (!(pic_num & 1)) yading@10: /* opposite field */ yading@10: *structure ^= PICT_FRAME; yading@10: pic_num >>= 1; yading@10: } yading@10: yading@10: return pic_num; yading@10: } yading@10: yading@10: int ff_h264_decode_ref_pic_list_reordering(H264Context *h) yading@10: { yading@10: int list, index, pic_structure, i; yading@10: yading@10: print_short_term(h); yading@10: print_long_term(h); yading@10: yading@10: for (list = 0; list < h->list_count; list++) { yading@10: for (i = 0; i < h->ref_count[list]; i++) yading@10: COPY_PICTURE(&h->ref_list[list][i], &h->default_ref_list[list][i]); yading@10: yading@10: if (get_bits1(&h->gb)) { yading@10: int pred = h->curr_pic_num; yading@10: yading@10: for (index = 0; ; index++) { yading@10: unsigned int reordering_of_pic_nums_idc = get_ue_golomb_31(&h->gb); yading@10: unsigned int pic_id; yading@10: int i; yading@10: Picture *ref = NULL; yading@10: yading@10: if (reordering_of_pic_nums_idc == 3) yading@10: break; yading@10: yading@10: if (index >= h->ref_count[list]) { yading@10: av_log(h->avctx, AV_LOG_ERROR, "reference count overflow\n"); yading@10: return -1; yading@10: } yading@10: yading@10: if (reordering_of_pic_nums_idc < 3) { yading@10: if (reordering_of_pic_nums_idc < 2) { yading@10: const unsigned int abs_diff_pic_num = get_ue_golomb(&h->gb) + 1; yading@10: int frame_num; yading@10: yading@10: if (abs_diff_pic_num > h->max_pic_num) { yading@10: av_log(h->avctx, AV_LOG_ERROR, "abs_diff_pic_num overflow\n"); yading@10: return -1; yading@10: } yading@10: yading@10: if (reordering_of_pic_nums_idc == 0) yading@10: pred -= abs_diff_pic_num; yading@10: else yading@10: pred += abs_diff_pic_num; yading@10: pred &= h->max_pic_num - 1; yading@10: yading@10: frame_num = pic_num_extract(h, pred, &pic_structure); yading@10: yading@10: for (i = h->short_ref_count - 1; i >= 0; i--) { yading@10: ref = h->short_ref[i]; yading@10: assert(ref->reference); yading@10: assert(!ref->long_ref); yading@10: if (ref->frame_num == frame_num && yading@10: (ref->reference & pic_structure)) yading@10: break; yading@10: } yading@10: if (i >= 0) yading@10: ref->pic_id = pred; yading@10: } else { yading@10: int long_idx; yading@10: pic_id = get_ue_golomb(&h->gb); //long_term_pic_idx yading@10: yading@10: long_idx = pic_num_extract(h, pic_id, &pic_structure); yading@10: yading@10: if (long_idx > 31) { yading@10: av_log(h->avctx, AV_LOG_ERROR, "long_term_pic_idx overflow\n"); yading@10: return -1; yading@10: } yading@10: ref = h->long_ref[long_idx]; yading@10: assert(!(ref && !ref->reference)); yading@10: if (ref && (ref->reference & pic_structure)) { yading@10: ref->pic_id = pic_id; yading@10: assert(ref->long_ref); yading@10: i = 0; yading@10: } else { yading@10: i = -1; yading@10: } yading@10: } yading@10: yading@10: if (i < 0) { yading@10: av_log(h->avctx, AV_LOG_ERROR, "reference picture missing during reorder\n"); yading@10: memset(&h->ref_list[list][index], 0, sizeof(Picture)); //FIXME yading@10: } else { yading@10: for (i = index; i + 1 < h->ref_count[list]; i++) { yading@10: if (ref->long_ref == h->ref_list[list][i].long_ref && yading@10: ref->pic_id == h->ref_list[list][i].pic_id) yading@10: break; yading@10: } yading@10: for (; i > index; i--) { yading@10: COPY_PICTURE(&h->ref_list[list][i], &h->ref_list[list][i - 1]); yading@10: } yading@10: COPY_PICTURE(&h->ref_list[list][index], ref); yading@10: if (FIELD_PICTURE(h)) { yading@10: pic_as_field(&h->ref_list[list][index], pic_structure); yading@10: } yading@10: } yading@10: } else { yading@10: av_log(h->avctx, AV_LOG_ERROR, "illegal reordering_of_pic_nums_idc\n"); yading@10: return -1; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: for (list = 0; list < h->list_count; list++) { yading@10: for (index = 0; index < h->ref_count[list]; index++) { yading@10: if ( !h->ref_list[list][index].f.data[0] yading@10: || (!FIELD_PICTURE(h) && (h->ref_list[list][index].reference&3) != 3)) { yading@10: int i; yading@10: av_log(h->avctx, AV_LOG_ERROR, "Missing reference picture, default is %d\n", h->default_ref_list[list][0].poc); yading@10: for (i = 0; i < FF_ARRAY_ELEMS(h->last_pocs); i++) yading@10: h->last_pocs[i] = INT_MIN; yading@10: if (h->default_ref_list[list][0].f.data[0] yading@10: && !(!FIELD_PICTURE(h) && (h->default_ref_list[list][0].reference&3) != 3)) yading@10: COPY_PICTURE(&h->ref_list[list][index], &h->default_ref_list[list][0]); yading@10: else yading@10: return -1; yading@10: } yading@10: av_assert0(av_buffer_get_ref_count(h->ref_list[list][index].f.buf[0]) > 0); yading@10: } yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: void ff_h264_fill_mbaff_ref_list(H264Context *h) yading@10: { yading@10: int list, i, j; yading@10: for (list = 0; list < h->list_count; list++) { yading@10: for (i = 0; i < h->ref_count[list]; i++) { yading@10: Picture *frame = &h->ref_list[list][i]; yading@10: Picture *field = &h->ref_list[list][16 + 2 * i]; yading@10: COPY_PICTURE(field, frame); yading@10: for (j = 0; j < 3; j++) yading@10: field[0].f.linesize[j] <<= 1; yading@10: field[0].reference = PICT_TOP_FIELD; yading@10: field[0].poc = field[0].field_poc[0]; yading@10: COPY_PICTURE(field + 1, field); yading@10: for (j = 0; j < 3; j++) yading@10: field[1].f.data[j] += frame->f.linesize[j]; yading@10: field[1].reference = PICT_BOTTOM_FIELD; yading@10: field[1].poc = field[1].field_poc[1]; yading@10: yading@10: h->luma_weight[16 + 2 * i][list][0] = h->luma_weight[16 + 2 * i + 1][list][0] = h->luma_weight[i][list][0]; yading@10: h->luma_weight[16 + 2 * i][list][1] = h->luma_weight[16 + 2 * i + 1][list][1] = h->luma_weight[i][list][1]; yading@10: for (j = 0; j < 2; j++) { yading@10: h->chroma_weight[16 + 2 * i][list][j][0] = h->chroma_weight[16 + 2 * i + 1][list][j][0] = h->chroma_weight[i][list][j][0]; yading@10: h->chroma_weight[16 + 2 * i][list][j][1] = h->chroma_weight[16 + 2 * i + 1][list][j][1] = h->chroma_weight[i][list][j][1]; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: /** yading@10: * Mark a picture as no longer needed for reference. The refmask yading@10: * argument allows unreferencing of individual fields or the whole frame. yading@10: * If the picture becomes entirely unreferenced, but is being held for yading@10: * display purposes, it is marked as such. yading@10: * @param refmask mask of fields to unreference; the mask is bitwise yading@10: * anded with the reference marking of pic yading@10: * @return non-zero if pic becomes entirely unreferenced (except possibly yading@10: * for display purposes) zero if one of the fields remains in yading@10: * reference yading@10: */ yading@10: static inline int unreference_pic(H264Context *h, Picture *pic, int refmask) yading@10: { yading@10: int i; yading@10: if (pic->reference &= refmask) { yading@10: return 0; yading@10: } else { yading@10: for(i = 0; h->delayed_pic[i]; i++) yading@10: if(pic == h->delayed_pic[i]){ yading@10: pic->reference = DELAYED_PIC_REF; yading@10: break; yading@10: } yading@10: return 1; yading@10: } yading@10: } yading@10: yading@10: /** yading@10: * Find a Picture in the short term reference list by frame number. yading@10: * @param frame_num frame number to search for yading@10: * @param idx the index into h->short_ref where returned picture is found yading@10: * undefined if no picture found. yading@10: * @return pointer to the found picture, or NULL if no pic with the provided yading@10: * frame number is found yading@10: */ yading@10: static Picture *find_short(H264Context *h, int frame_num, int *idx) yading@10: { yading@10: int i; yading@10: yading@10: for (i = 0; i < h->short_ref_count; i++) { yading@10: Picture *pic = h->short_ref[i]; yading@10: if (h->avctx->debug & FF_DEBUG_MMCO) yading@10: av_log(h->avctx, AV_LOG_DEBUG, "%d %d %p\n", i, pic->frame_num, pic); yading@10: if (pic->frame_num == frame_num) { yading@10: *idx = i; yading@10: return pic; yading@10: } yading@10: } yading@10: return NULL; yading@10: } yading@10: yading@10: /** yading@10: * Remove a picture from the short term reference list by its index in yading@10: * that list. This does no checking on the provided index; it is assumed yading@10: * to be valid. Other list entries are shifted down. yading@10: * @param i index into h->short_ref of picture to remove. yading@10: */ yading@10: static void remove_short_at_index(H264Context *h, int i) yading@10: { yading@10: assert(i >= 0 && i < h->short_ref_count); yading@10: h->short_ref[i] = NULL; yading@10: if (--h->short_ref_count) yading@10: memmove(&h->short_ref[i], &h->short_ref[i + 1], yading@10: (h->short_ref_count - i) * sizeof(Picture*)); yading@10: } yading@10: yading@10: /** yading@10: * yading@10: * @return the removed picture or NULL if an error occurs yading@10: */ yading@10: static Picture *remove_short(H264Context *h, int frame_num, int ref_mask) yading@10: { yading@10: Picture *pic; yading@10: int i; yading@10: yading@10: if (h->avctx->debug & FF_DEBUG_MMCO) yading@10: av_log(h->avctx, AV_LOG_DEBUG, "remove short %d count %d\n", frame_num, h->short_ref_count); yading@10: yading@10: pic = find_short(h, frame_num, &i); yading@10: if (pic) { yading@10: if (unreference_pic(h, pic, ref_mask)) yading@10: remove_short_at_index(h, i); yading@10: } yading@10: yading@10: return pic; yading@10: } yading@10: yading@10: /** yading@10: * Remove a picture from the long term reference list by its index in yading@10: * that list. yading@10: * @return the removed picture or NULL if an error occurs yading@10: */ yading@10: static Picture *remove_long(H264Context *h, int i, int ref_mask) yading@10: { yading@10: Picture *pic; yading@10: yading@10: pic = h->long_ref[i]; yading@10: if (pic) { yading@10: if (unreference_pic(h, pic, ref_mask)) { yading@10: assert(h->long_ref[i]->long_ref == 1); yading@10: h->long_ref[i]->long_ref = 0; yading@10: h->long_ref[i] = NULL; yading@10: h->long_ref_count--; yading@10: } yading@10: } yading@10: yading@10: return pic; yading@10: } yading@10: yading@10: void ff_h264_remove_all_refs(H264Context *h) yading@10: { yading@10: int i; yading@10: yading@10: for (i = 0; i < 16; i++) { yading@10: remove_long(h, i, 0); yading@10: } yading@10: assert(h->long_ref_count == 0); yading@10: yading@10: for (i = 0; i < h->short_ref_count; i++) { yading@10: unreference_pic(h, h->short_ref[i], 0); yading@10: h->short_ref[i] = NULL; yading@10: } yading@10: h->short_ref_count = 0; yading@10: yading@10: memset(h->default_ref_list, 0, sizeof(h->default_ref_list)); yading@10: memset(h->ref_list, 0, sizeof(h->ref_list)); yading@10: } yading@10: yading@10: /** yading@10: * print short term list yading@10: */ yading@10: static void print_short_term(H264Context *h) yading@10: { yading@10: uint32_t i; yading@10: if (h->avctx->debug & FF_DEBUG_MMCO) { yading@10: av_log(h->avctx, AV_LOG_DEBUG, "short term list:\n"); yading@10: for (i = 0; i < h->short_ref_count; i++) { yading@10: Picture *pic = h->short_ref[i]; yading@10: av_log(h->avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", yading@10: i, pic->frame_num, pic->poc, pic->f.data[0]); yading@10: } yading@10: } yading@10: } yading@10: yading@10: /** yading@10: * print long term list yading@10: */ yading@10: static void print_long_term(H264Context *h) yading@10: { yading@10: uint32_t i; yading@10: if (h->avctx->debug & FF_DEBUG_MMCO) { yading@10: av_log(h->avctx, AV_LOG_DEBUG, "long term list:\n"); yading@10: for (i = 0; i < 16; i++) { yading@10: Picture *pic = h->long_ref[i]; yading@10: if (pic) { yading@10: av_log(h->avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", yading@10: i, pic->frame_num, pic->poc, pic->f.data[0]); yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: static int check_opcodes(MMCO *mmco1, MMCO *mmco2, int n_mmcos) yading@10: { yading@10: int i; yading@10: yading@10: for (i = 0; i < n_mmcos; i++) { yading@10: if (mmco1[i].opcode != mmco2[i].opcode) { yading@10: av_log(NULL, AV_LOG_ERROR, "MMCO opcode [%d, %d] at %d mismatches between slices\n", yading@10: mmco1[i].opcode, mmco2[i].opcode, i); yading@10: return -1; yading@10: } yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: int ff_generate_sliding_window_mmcos(H264Context *h, int first_slice) yading@10: { yading@10: MMCO mmco_temp[MAX_MMCO_COUNT], *mmco = first_slice ? h->mmco : mmco_temp; yading@10: int mmco_index = 0, i; yading@10: yading@10: if (h->short_ref_count && yading@10: h->long_ref_count + h->short_ref_count >= h->sps.ref_frame_count && yading@10: !(FIELD_PICTURE(h) && !h->first_field && h->cur_pic_ptr->reference)) { yading@10: mmco[0].opcode = MMCO_SHORT2UNUSED; yading@10: mmco[0].short_pic_num = h->short_ref[h->short_ref_count - 1]->frame_num; yading@10: mmco_index = 1; yading@10: if (FIELD_PICTURE(h)) { yading@10: mmco[0].short_pic_num *= 2; yading@10: mmco[1].opcode = MMCO_SHORT2UNUSED; yading@10: mmco[1].short_pic_num = mmco[0].short_pic_num + 1; yading@10: mmco_index = 2; yading@10: } yading@10: } yading@10: yading@10: if (first_slice) { yading@10: h->mmco_index = mmco_index; yading@10: } else if (!first_slice && mmco_index >= 0 && yading@10: (mmco_index != h->mmco_index || yading@10: (i = check_opcodes(h->mmco, mmco_temp, mmco_index)))) { yading@10: av_log(h->avctx, AV_LOG_ERROR, yading@10: "Inconsistent MMCO state between slices [%d, %d]\n", yading@10: mmco_index, h->mmco_index); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count) yading@10: { yading@10: int i, av_uninit(j); yading@10: int current_ref_assigned = 0, err = 0; yading@10: Picture *av_uninit(pic); yading@10: yading@10: if ((h->avctx->debug & FF_DEBUG_MMCO) && mmco_count == 0) yading@10: av_log(h->avctx, AV_LOG_DEBUG, "no mmco here\n"); yading@10: yading@10: for (i = 0; i < mmco_count; i++) { yading@10: int av_uninit(structure), av_uninit(frame_num); yading@10: if (h->avctx->debug & FF_DEBUG_MMCO) yading@10: av_log(h->avctx, AV_LOG_DEBUG, "mmco:%d %d %d\n", h->mmco[i].opcode, yading@10: h->mmco[i].short_pic_num, h->mmco[i].long_arg); yading@10: yading@10: if (mmco[i].opcode == MMCO_SHORT2UNUSED || yading@10: mmco[i].opcode == MMCO_SHORT2LONG) { yading@10: frame_num = pic_num_extract(h, mmco[i].short_pic_num, &structure); yading@10: pic = find_short(h, frame_num, &j); yading@10: if (!pic) { yading@10: if (mmco[i].opcode != MMCO_SHORT2LONG || yading@10: !h->long_ref[mmco[i].long_arg] || yading@10: h->long_ref[mmco[i].long_arg]->frame_num != frame_num) { yading@10: av_log(h->avctx, AV_LOG_ERROR, "mmco: unref short failure\n"); yading@10: err = AVERROR_INVALIDDATA; yading@10: } yading@10: continue; yading@10: } yading@10: } yading@10: yading@10: switch (mmco[i].opcode) { yading@10: case MMCO_SHORT2UNUSED: yading@10: if (h->avctx->debug & FF_DEBUG_MMCO) yading@10: av_log(h->avctx, AV_LOG_DEBUG, "mmco: unref short %d count %d\n", yading@10: h->mmco[i].short_pic_num, h->short_ref_count); yading@10: remove_short(h, frame_num, structure ^ PICT_FRAME); yading@10: break; yading@10: case MMCO_SHORT2LONG: yading@10: if (h->long_ref[mmco[i].long_arg] != pic) yading@10: remove_long(h, mmco[i].long_arg, 0); yading@10: yading@10: remove_short_at_index(h, j); yading@10: h->long_ref[ mmco[i].long_arg ] = pic; yading@10: if (h->long_ref[mmco[i].long_arg]) { yading@10: h->long_ref[mmco[i].long_arg]->long_ref = 1; yading@10: h->long_ref_count++; yading@10: } yading@10: break; yading@10: case MMCO_LONG2UNUSED: yading@10: j = pic_num_extract(h, mmco[i].long_arg, &structure); yading@10: pic = h->long_ref[j]; yading@10: if (pic) { yading@10: remove_long(h, j, structure ^ PICT_FRAME); yading@10: } else if (h->avctx->debug & FF_DEBUG_MMCO) yading@10: av_log(h->avctx, AV_LOG_DEBUG, "mmco: unref long failure\n"); yading@10: break; yading@10: case MMCO_LONG: yading@10: // Comment below left from previous code as it is an interresting note. yading@10: /* First field in pair is in short term list or yading@10: * at a different long term index. yading@10: * This is not allowed; see 7.4.3.3, notes 2 and 3. yading@10: * Report the problem and keep the pair where it is, yading@10: * and mark this field valid. yading@10: */ yading@10: yading@10: if (h->long_ref[mmco[i].long_arg] != h->cur_pic_ptr) { yading@10: if (h->cur_pic_ptr->long_ref) { yading@10: for(j=0; j<16; j++) { yading@10: if(h->long_ref[j] == h->cur_pic_ptr) { yading@10: remove_long(h, j, 0); yading@10: av_log(h->avctx, AV_LOG_ERROR, "mmco: cannot assign current picture to 2 long term references\n"); yading@10: } yading@10: } yading@10: } yading@10: av_assert0(!h->cur_pic_ptr->long_ref); yading@10: remove_long(h, mmco[i].long_arg, 0); yading@10: if (remove_short(h, h->cur_pic_ptr->frame_num, 0)) { yading@10: av_log(h->avctx, AV_LOG_ERROR, "mmco: cannot assign current picture to short and long at the same time\n"); yading@10: } yading@10: yading@10: h->long_ref[mmco[i].long_arg] = h->cur_pic_ptr; yading@10: h->long_ref[mmco[i].long_arg]->long_ref = 1; yading@10: h->long_ref_count++; yading@10: } yading@10: yading@10: h->cur_pic_ptr->reference |= h->picture_structure; yading@10: current_ref_assigned = 1; yading@10: break; yading@10: case MMCO_SET_MAX_LONG: yading@10: assert(mmco[i].long_arg <= 16); yading@10: // just remove the long term which index is greater than new max yading@10: for (j = mmco[i].long_arg; j < 16; j++) { yading@10: remove_long(h, j, 0); yading@10: } yading@10: break; yading@10: case MMCO_RESET: yading@10: while (h->short_ref_count) { yading@10: remove_short(h, h->short_ref[0]->frame_num, 0); yading@10: } yading@10: for (j = 0; j < 16; j++) { yading@10: remove_long(h, j, 0); yading@10: } yading@10: h->frame_num = h->cur_pic_ptr->frame_num = 0; yading@10: h->mmco_reset = 1; yading@10: h->cur_pic_ptr->mmco_reset = 1; yading@10: for (j = 0; j < MAX_DELAYED_PIC_COUNT; j++) yading@10: h->last_pocs[j] = INT_MIN; yading@10: break; yading@10: default: assert(0); yading@10: } yading@10: } yading@10: yading@10: if (!current_ref_assigned) { yading@10: /* Second field of complementary field pair; the first field of yading@10: * which is already referenced. If short referenced, it yading@10: * should be first entry in short_ref. If not, it must exist yading@10: * in long_ref; trying to put it on the short list here is an yading@10: * error in the encoded bit stream (ref: 7.4.3.3, NOTE 2 and 3). yading@10: */ yading@10: if (h->short_ref_count && h->short_ref[0] == h->cur_pic_ptr) { yading@10: /* Just mark the second field valid */ yading@10: h->cur_pic_ptr->reference = PICT_FRAME; yading@10: } else if (h->cur_pic_ptr->long_ref) { yading@10: av_log(h->avctx, AV_LOG_ERROR, "illegal short term reference " yading@10: "assignment for second field " yading@10: "in complementary field pair " yading@10: "(first field is long term)\n"); yading@10: err = AVERROR_INVALIDDATA; yading@10: } else { yading@10: pic = remove_short(h, h->cur_pic_ptr->frame_num, 0); yading@10: if (pic) { yading@10: av_log(h->avctx, AV_LOG_ERROR, "illegal short term buffer state detected\n"); yading@10: err = AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: if (h->short_ref_count) yading@10: memmove(&h->short_ref[1], &h->short_ref[0], yading@10: h->short_ref_count * sizeof(Picture*)); yading@10: yading@10: h->short_ref[0] = h->cur_pic_ptr; yading@10: h->short_ref_count++; yading@10: h->cur_pic_ptr->reference |= h->picture_structure; yading@10: } yading@10: } yading@10: yading@10: if (h->long_ref_count + h->short_ref_count > FFMAX(h->sps.ref_frame_count, 1)) { yading@10: yading@10: /* We have too many reference frames, probably due to corrupted yading@10: * stream. Need to discard one frame. Prevents overrun of the yading@10: * short_ref and long_ref buffers. yading@10: */ yading@10: av_log(h->avctx, AV_LOG_ERROR, yading@10: "number of reference frames (%d+%d) exceeds max (%d; probably " yading@10: "corrupt input), discarding one\n", yading@10: h->long_ref_count, h->short_ref_count, h->sps.ref_frame_count); yading@10: err = AVERROR_INVALIDDATA; yading@10: yading@10: if (h->long_ref_count && !h->short_ref_count) { yading@10: for (i = 0; i < 16; ++i) yading@10: if (h->long_ref[i]) yading@10: break; yading@10: yading@10: assert(i < 16); yading@10: remove_long(h, i, 0); yading@10: } else { yading@10: pic = h->short_ref[h->short_ref_count - 1]; yading@10: remove_short(h, pic->frame_num, 0); yading@10: } yading@10: } yading@10: yading@10: print_short_term(h); yading@10: print_long_term(h); yading@10: yading@10: if(err >= 0 && h->long_ref_count==0 && h->short_ref_count<=2 && h->pps.ref_count[0]<=1 + (h->picture_structure != PICT_FRAME) && h->cur_pic_ptr->f.pict_type == AV_PICTURE_TYPE_I){ yading@10: h->cur_pic_ptr->sync |= 1; yading@10: if(!h->avctx->has_b_frames) yading@10: h->sync = 2; yading@10: } yading@10: yading@10: return (h->avctx->err_recognition & AV_EF_EXPLODE) ? err : 0; yading@10: } yading@10: yading@10: int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb, yading@10: int first_slice) yading@10: { yading@10: int i, ret; yading@10: MMCO mmco_temp[MAX_MMCO_COUNT], *mmco = first_slice ? h->mmco : mmco_temp; yading@10: int mmco_index = 0; yading@10: yading@10: if (h->nal_unit_type == NAL_IDR_SLICE) { // FIXME fields yading@10: skip_bits1(gb); // broken_link yading@10: if (get_bits1(gb)) { yading@10: mmco[0].opcode = MMCO_LONG; yading@10: mmco[0].long_arg = 0; yading@10: mmco_index = 1; yading@10: } yading@10: } else { yading@10: if (get_bits1(gb)) { // adaptive_ref_pic_marking_mode_flag yading@10: for (i = 0; i < MAX_MMCO_COUNT; i++) { yading@10: MMCOOpcode opcode = get_ue_golomb_31(gb); yading@10: yading@10: mmco[i].opcode = opcode; yading@10: if (opcode == MMCO_SHORT2UNUSED || opcode == MMCO_SHORT2LONG) { yading@10: mmco[i].short_pic_num = yading@10: (h->curr_pic_num - get_ue_golomb(gb) - 1) & yading@10: (h->max_pic_num - 1); yading@10: #if 0 yading@10: if (mmco[i].short_pic_num >= h->short_ref_count || yading@10: h->short_ref[ mmco[i].short_pic_num ] == NULL){ yading@10: av_log(s->avctx, AV_LOG_ERROR, yading@10: "illegal short ref in memory management control " yading@10: "operation %d\n", mmco); yading@10: return -1; yading@10: } yading@10: #endif yading@10: } yading@10: if (opcode == MMCO_SHORT2LONG || opcode == MMCO_LONG2UNUSED || yading@10: opcode == MMCO_LONG || opcode == MMCO_SET_MAX_LONG) { yading@10: unsigned int long_arg = get_ue_golomb_31(gb); yading@10: if (long_arg >= 32 || yading@10: (long_arg >= 16 && !(opcode == MMCO_SET_MAX_LONG && yading@10: long_arg == 16) && yading@10: !(opcode == MMCO_LONG2UNUSED && FIELD_PICTURE(h)))) { yading@10: av_log(h->avctx, AV_LOG_ERROR, yading@10: "illegal long ref in memory management control " yading@10: "operation %d\n", opcode); yading@10: return -1; yading@10: } yading@10: mmco[i].long_arg = long_arg; yading@10: } yading@10: yading@10: if (opcode > (unsigned) MMCO_LONG) { yading@10: av_log(h->avctx, AV_LOG_ERROR, yading@10: "illegal memory management control operation %d\n", yading@10: opcode); yading@10: return -1; yading@10: } yading@10: if (opcode == MMCO_END) yading@10: break; yading@10: } yading@10: mmco_index = i; yading@10: } else { yading@10: if (first_slice) { yading@10: ret = ff_generate_sliding_window_mmcos(h, first_slice); yading@10: if (ret < 0 && h->avctx->err_recognition & AV_EF_EXPLODE) yading@10: return ret; yading@10: } yading@10: mmco_index = -1; yading@10: } yading@10: } yading@10: yading@10: if (first_slice && mmco_index != -1) { yading@10: h->mmco_index = mmco_index; yading@10: } else if (!first_slice && mmco_index >= 0 && yading@10: (mmco_index != h->mmco_index || yading@10: (i = check_opcodes(h->mmco, mmco_temp, mmco_index)))) { yading@10: av_log(h->avctx, AV_LOG_ERROR, yading@10: "Inconsistent MMCO state between slices [%d, %d]\n", yading@10: mmco_index, h->mmco_index); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: return 0; yading@10: }