From 741fb4b9e135cfb161a749db88713229038577bb Mon Sep 17 00:00:00 2001 From: Tim Redfern Date: Thu, 5 Sep 2013 17:55:35 +0100 Subject: making act segmenter --- ffmpeg1/libavcodec/h264_refs.c | 813 ----------------------------------------- 1 file changed, 813 deletions(-) delete mode 100644 ffmpeg1/libavcodec/h264_refs.c (limited to 'ffmpeg1/libavcodec/h264_refs.c') diff --git a/ffmpeg1/libavcodec/h264_refs.c b/ffmpeg1/libavcodec/h264_refs.c deleted file mode 100644 index c3e7b7c..0000000 --- a/ffmpeg1/libavcodec/h264_refs.c +++ /dev/null @@ -1,813 +0,0 @@ -/* - * H.26L/H.264/AVC/JVT/14496-10/... reference picture handling - * Copyright (c) 2003 Michael Niedermayer - * - * 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 / MPEG4 part10 reference picture handling. - * @author Michael Niedermayer - */ - -#include "libavutil/avassert.h" -#include "internal.h" -#include "avcodec.h" -#include "h264.h" -#include "golomb.h" - -//#undef NDEBUG -#include - -#define COPY_PICTURE(dst, src) \ -do {\ - *(dst) = *(src);\ - (dst)->f.extended_data = (dst)->f.data;\ - (dst)->tf.f = &(dst)->f;\ -} while (0) - - -static void pic_as_field(Picture *pic, const int parity){ - int i; - for (i = 0; i < 4; ++i) { - if (parity == PICT_BOTTOM_FIELD) - pic->f.data[i] += pic->f.linesize[i]; - pic->reference = parity; - pic->f.linesize[i] *= 2; - } - pic->poc= pic->field_poc[parity == PICT_BOTTOM_FIELD]; -} - -static int split_field_copy(Picture *dest, Picture *src, int parity, int id_add) -{ - int match = !!(src->reference & parity); - - if (match) { - COPY_PICTURE(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(Picture *def, Picture **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) { - 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) { - 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(Picture **sorted, Picture **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; -} - -int ff_h264_fill_default_ref_list(H264Context *h) -{ - int i, len; - - if (h->slice_type_nos == AV_PICTURE_TYPE_B) { - Picture *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(h->default_ref_list[list], sorted, len, 0, h->picture_structure); - len += build_def_list(h->default_ref_list[list] + len, h->long_ref, 16, 1, h->picture_structure); - av_assert0(len <= 32); - - if (len < h->ref_count[list]) - memset(&h->default_ref_list[list][len], 0, sizeof(Picture) * (h->ref_count[list] - len)); - lens[list] = len; - } - - if (lens[0] == lens[1] && lens[1] > 1) { - 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++); - if (i == lens[0]) { - Picture tmp; - COPY_PICTURE(&tmp, &h->default_ref_list[1][0]); - COPY_PICTURE(&h->default_ref_list[1][0], &h->default_ref_list[1][1]); - COPY_PICTURE(&h->default_ref_list[1][1], &tmp); - } - } - } else { - len = build_def_list(h->default_ref_list[0], h->short_ref, h->short_ref_count, 0, h->picture_structure); - len += build_def_list(h->default_ref_list[0] + len, h-> long_ref, 16, 1, h->picture_structure); - av_assert0(len <= 32); - if (len < h->ref_count[0]) - memset(&h->default_ref_list[0][len], 0, sizeof(Picture) * (h->ref_count[0] - len)); - } -#ifdef TRACE - for (i = 0; i < h->ref_count[0]; i++) { - tprintf(h->avctx, "List0: %s fn:%d 0x%p\n", - (h->default_ref_list[0][i].long_ref ? "LT" : "ST"), - h->default_ref_list[0][i].pic_id, - h->default_ref_list[0][i].f.data[0]); - } - if (h->slice_type_nos == AV_PICTURE_TYPE_B) { - for (i = 0; i < h->ref_count[1]; i++) { - tprintf(h->avctx, "List1: %s fn:%d 0x%p\n", - (h->default_ref_list[1][i].long_ref ? "LT" : "ST"), - h->default_ref_list[1][i].pic_id, - h->default_ref_list[1][i].f.data[0]); - } - } -#endif - return 0; -} - -static void print_short_term(H264Context *h); -static void print_long_term(H264Context *h); - -/** - * 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_numpicture_structure; - if (FIELD_PICTURE(h)) { - if (!(pic_num & 1)) - /* opposite field */ - *structure ^= PICT_FRAME; - pic_num >>= 1; - } - - return pic_num; -} - -int ff_h264_decode_ref_pic_list_reordering(H264Context *h) -{ - int list, index, pic_structure, i; - - print_short_term(h); - print_long_term(h); - - for (list = 0; list < h->list_count; list++) { - for (i = 0; i < h->ref_count[list]; i++) - COPY_PICTURE(&h->ref_list[list][i], &h->default_ref_list[list][i]); - - if (get_bits1(&h->gb)) { - int pred = h->curr_pic_num; - - for (index = 0; ; index++) { - unsigned int reordering_of_pic_nums_idc = get_ue_golomb_31(&h->gb); - unsigned int pic_id; - int i; - Picture *ref = NULL; - - if (reordering_of_pic_nums_idc == 3) - break; - - if (index >= h->ref_count[list]) { - av_log(h->avctx, AV_LOG_ERROR, "reference count overflow\n"); - return -1; - } - - if (reordering_of_pic_nums_idc < 3) { - if (reordering_of_pic_nums_idc < 2) { - const unsigned int abs_diff_pic_num = get_ue_golomb(&h->gb) + 1; - int frame_num; - - if (abs_diff_pic_num > h->max_pic_num) { - av_log(h->avctx, AV_LOG_ERROR, "abs_diff_pic_num overflow\n"); - return -1; - } - - if (reordering_of_pic_nums_idc == 0) - pred -= abs_diff_pic_num; - else - pred += abs_diff_pic_num; - pred &= h->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; - } else { - int long_idx; - pic_id = get_ue_golomb(&h->gb); //long_term_pic_idx - - long_idx = pic_num_extract(h, pic_id, &pic_structure); - - if (long_idx > 31) { - av_log(h->avctx, AV_LOG_ERROR, "long_term_pic_idx overflow\n"); - return -1; - } - 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; - } - } - - if (i < 0) { - av_log(h->avctx, AV_LOG_ERROR, "reference picture missing during reorder\n"); - memset(&h->ref_list[list][index], 0, sizeof(Picture)); //FIXME - } else { - for (i = index; i + 1 < h->ref_count[list]; i++) { - if (ref->long_ref == h->ref_list[list][i].long_ref && - ref->pic_id == h->ref_list[list][i].pic_id) - break; - } - for (; i > index; i--) { - COPY_PICTURE(&h->ref_list[list][i], &h->ref_list[list][i - 1]); - } - COPY_PICTURE(&h->ref_list[list][index], ref); - if (FIELD_PICTURE(h)) { - pic_as_field(&h->ref_list[list][index], pic_structure); - } - } - } else { - av_log(h->avctx, AV_LOG_ERROR, "illegal reordering_of_pic_nums_idc\n"); - return -1; - } - } - } - } - for (list = 0; list < h->list_count; list++) { - for (index = 0; index < h->ref_count[list]; index++) { - if ( !h->ref_list[list][index].f.data[0] - || (!FIELD_PICTURE(h) && (h->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[list][0].poc); - for (i = 0; i < FF_ARRAY_ELEMS(h->last_pocs); i++) - h->last_pocs[i] = INT_MIN; - if (h->default_ref_list[list][0].f.data[0] - && !(!FIELD_PICTURE(h) && (h->default_ref_list[list][0].reference&3) != 3)) - COPY_PICTURE(&h->ref_list[list][index], &h->default_ref_list[list][0]); - else - return -1; - } - } - } - - return 0; -} - -void ff_h264_fill_mbaff_ref_list(H264Context *h) -{ - int list, i, j; - for (list = 0; list < h->list_count; list++) { - for (i = 0; i < h->ref_count[list]; i++) { - Picture *frame = &h->ref_list[list][i]; - Picture *field = &h->ref_list[list][16 + 2 * i]; - COPY_PICTURE(field, frame); - for (j = 0; j < 3; j++) - field[0].f.linesize[j] <<= 1; - field[0].reference = PICT_TOP_FIELD; - field[0].poc = field[0].field_poc[0]; - COPY_PICTURE(field + 1, field); - for (j = 0; j < 3; j++) - field[1].f.data[j] += frame->f.linesize[j]; - field[1].reference = PICT_BOTTOM_FIELD; - field[1].poc = field[1].field_poc[1]; - - h->luma_weight[16 + 2 * i][list][0] = h->luma_weight[16 + 2 * i + 1][list][0] = h->luma_weight[i][list][0]; - h->luma_weight[16 + 2 * i][list][1] = h->luma_weight[16 + 2 * i + 1][list][1] = h->luma_weight[i][list][1]; - for (j = 0; j < 2; j++) { - 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]; - 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]; - } - } - } -} - -/** - * 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, Picture *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 Picture 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 Picture *find_short(H264Context *h, int frame_num, int *idx) -{ - int i; - - for (i = 0; i < h->short_ref_count; i++) { - Picture *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(Picture*)); -} - -/** - * - * @return the removed picture or NULL if an error occurs - */ -static Picture *remove_short(H264Context *h, int frame_num, int ref_mask) -{ - Picture *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 Picture *remove_long(H264Context *h, int i, int ref_mask) -{ - Picture *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); - - 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_list, 0, sizeof(h->default_ref_list)); - memset(h->ref_list, 0, sizeof(h->ref_list)); -} - -/** - * print short term list - */ -static void print_short_term(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++) { - Picture *pic = h->short_ref[i]; - av_log(h->avctx, AV_LOG_DEBUG, "%d 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(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++) { - Picture *pic = h->long_ref[i]; - if (pic) { - av_log(h->avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", - i, pic->frame_num, pic->poc, pic->f.data[0]); - } - } - } -} - -static int check_opcodes(MMCO *mmco1, MMCO *mmco2, int n_mmcos) -{ - int i; - - for (i = 0; i < n_mmcos; i++) { - if (mmco1[i].opcode != mmco2[i].opcode) { - av_log(NULL, AV_LOG_ERROR, "MMCO opcode [%d, %d] at %d mismatches between slices\n", - mmco1[i].opcode, mmco2[i].opcode, i); - return -1; - } - } - - return 0; -} - -int ff_generate_sliding_window_mmcos(H264Context *h, int first_slice) -{ - MMCO mmco_temp[MAX_MMCO_COUNT], *mmco = first_slice ? h->mmco : mmco_temp; - int mmco_index = 0, i; - - if (h->short_ref_count && - h->long_ref_count + h->short_ref_count >= h->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; - mmco_index = 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; - mmco_index = 2; - } - } - - if (first_slice) { - h->mmco_index = mmco_index; - } else if (!first_slice && mmco_index >= 0 && - (mmco_index != h->mmco_index || - (i = check_opcodes(h->mmco, mmco_temp, mmco_index)))) { - av_log(h->avctx, AV_LOG_ERROR, - "Inconsistent MMCO state between slices [%d, %d]\n", - mmco_index, h->mmco_index); - return AVERROR_INVALIDDATA; - } - return 0; -} - -int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count) -{ - int i, av_uninit(j); - int current_ref_assigned = 0, err = 0; - Picture *av_uninit(pic); - - 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, AV_LOG_ERROR, "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 interresting 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->long_ref[mmco[i].long_arg] != h->cur_pic_ptr) { - 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->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 = PICT_FRAME; - } 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(Picture*)); - - 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->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->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); - } - } - - print_short_term(h); - print_long_term(h); - - 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){ - h->cur_pic_ptr->sync |= 1; - if(!h->avctx->has_b_frames) - h->sync = 2; - } - - return (h->avctx->err_recognition & AV_EF_EXPLODE) ? err : 0; -} - -int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb, - int first_slice) -{ - int i, ret; - MMCO mmco_temp[MAX_MMCO_COUNT], *mmco = first_slice ? h->mmco : mmco_temp; - int mmco_index = 0; - - if (h->nal_unit_type == NAL_IDR_SLICE) { // FIXME fields - skip_bits1(gb); // broken_link - if (get_bits1(gb)) { - mmco[0].opcode = MMCO_LONG; - mmco[0].long_arg = 0; - mmco_index = 1; - } - } else { - if (get_bits1(gb)) { // adaptive_ref_pic_marking_mode_flag - 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 = - (h->curr_pic_num - get_ue_golomb(gb) - 1) & - (h->max_pic_num - 1); -#if 0 - if (mmco[i].short_pic_num >= h->short_ref_count || - h->short_ref[ mmco[i].short_pic_num ] == NULL){ - av_log(s->avctx, AV_LOG_ERROR, - "illegal short ref in memory management control " - "operation %d\n", mmco); - return -1; - } -#endif - } - 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(h)))) { - av_log(h->avctx, 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(h->avctx, AV_LOG_ERROR, - "illegal memory management control operation %d\n", - opcode); - return -1; - } - if (opcode == MMCO_END) - break; - } - mmco_index = i; - } else { - if (first_slice) { - ret = ff_generate_sliding_window_mmcos(h, first_slice); - if (ret < 0 && h->avctx->err_recognition & AV_EF_EXPLODE) - return ret; - } - mmco_index = -1; - } - } - - if (first_slice && mmco_index != -1) { - h->mmco_index = mmco_index; - } else if (!first_slice && mmco_index >= 0 && - (mmco_index != h->mmco_index || - (i = check_opcodes(h->mmco, mmco_temp, mmco_index)))) { - av_log(h->avctx, AV_LOG_ERROR, - "Inconsistent MMCO state between slices [%d, %d]\n", - mmco_index, h->mmco_index); - return AVERROR_INVALIDDATA; - } - - return 0; -} -- cgit v1.2.3