diff options
author | povaddict <povaddict@users.sourceforge.net> | 2010-02-10 02:16:44 +0300 |
---|---|---|
committer | povaddict <povaddict@users.sourceforge.net> | 2010-02-10 02:16:44 +0300 |
commit | 726a91b12a7524e45e7a901c9e4883af5b1bffe6 (patch) | |
tree | f5d25e3b2e84c92f4901280c73d5d3d7e6c3cd19 /src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/h264_refs.c | |
parent | 02183f6e47ad4ea1057de9950482f291f2ae4290 (diff) |
Rename several directories to use MixedCase instead of lowercase.
They now mostly match the case used in #includes,
and they're consistent with the names of the .h files they contain.
git-svn-id: https://mpc-hc.svn.sourceforge.net/svnroot/mpc-hc/trunk@1648 10f7b99b-c216-0410-bff0-8a66a9350fd8
Diffstat (limited to 'src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/h264_refs.c')
-rw-r--r-- | src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/h264_refs.c | 700 |
1 files changed, 700 insertions, 0 deletions
diff --git a/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/h264_refs.c b/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/h264_refs.c new file mode 100644 index 000000000..183f01526 --- /dev/null +++ b/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/h264_refs.c @@ -0,0 +1,700 @@ +/*
+ * 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 libavcodec/h264_refs.c
+ * H.264 / AVC / MPEG4 part10 reference picture handling.
+ * @author Michael Niedermayer <michaelni@gmx.at>
+ */
+
+#include "internal.h"
+#include "dsputil.h"
+#include "avcodec.h"
+#include "h264.h"
+#include "golomb.h"
+
+//#undef NDEBUG
+#include <assert.h>
+
+
+static void pic_as_field(Picture *pic, const int parity){
+ int i;
+ for (i = 0; i < 4; ++i) {
+ if (parity == PICT_BOTTOM_FIELD)
+ pic->data[i] += pic->linesize[i];
+ pic->reference = parity;
+ pic->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) {
+ *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){
+ MpegEncContext * const s = &h->s;
+ int i, len;
+
+ if(h->slice_type_nos==FF_B_TYPE){
+ Picture *sorted[32];
+ int cur_poc, list;
+ int lens[2];
+
+ if(FIELD_PICTURE)
+ cur_poc= s->current_picture_ptr->field_poc[ s->picture_structure == PICT_BOTTOM_FIELD ];
+ else
+ cur_poc= s->current_picture_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);
+ assert(len<=32);
+ len= build_def_list(h->default_ref_list[list] , sorted , len, 0, s->picture_structure);
+ len+=build_def_list(h->default_ref_list[list]+len, h->long_ref, 16 , 1, s->picture_structure);
+ assert(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].data[0] == h->default_ref_list[1][i].data[0] && i<lens[0]; i++);
+ if(i == lens[0])
+ FFSWAP(Picture, h->default_ref_list[1][0], h->default_ref_list[1][1]);
+ }
+ }else{
+ len = build_def_list(h->default_ref_list[0] , h->short_ref, h->short_ref_count, 0, s->picture_structure);
+ len+= build_def_list(h->default_ref_list[0]+len, h-> long_ref, 16 , 1, s->picture_structure);
+ assert(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->s.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].data[0]);
+ }
+ if(h->slice_type_nos==FF_B_TYPE){
+ for (i=0; i<h->ref_count[1]; i++) {
+ tprintf(h->s.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].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_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(H264Context *h, int pic_num, int *structure){
+ MpegEncContext * const s = &h->s;
+
+ *structure = s->picture_structure;
+ if(FIELD_PICTURE){
+ 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){
+ MpegEncContext * const s = &h->s;
+ int list, index, pic_structure;
+
+ print_short_term(h);
+ print_long_term(h);
+
+ for(list=0; list<h->list_count; list++){
+ memcpy(h->ref_list[list], h->default_ref_list[list], sizeof(Picture)*h->ref_count[list]);
+
+ if(get_bits1(&s->gb)){
+ int pred= h->curr_pic_num;
+
+ for(index=0; ; index++){
+ unsigned int reordering_of_pic_nums_idc= get_ue_golomb_31(&s->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->s.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(&s->gb) + 1;
+ int frame_num;
+
+ if(abs_diff_pic_num > h->max_pic_num){
+ av_log(h->s.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(&s->gb); //long_term_pic_idx
+
+ long_idx= pic_num_extract(h, pic_id, &pic_structure);
+
+ if(long_idx>31){
+ av_log(h->s.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->s.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--){
+ h->ref_list[list][i]= h->ref_list[list][i-1];
+ }
+ h->ref_list[list][index]= *ref;
+ if (FIELD_PICTURE){
+ pic_as_field(&h->ref_list[list][index], pic_structure);
+ }
+ }
+ }else{
+ av_log(h->s.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].data[0]){
+ av_log(h->s.avctx, AV_LOG_ERROR, "Missing reference picture\n");
+ if(h->default_ref_list[list][0].data[0])
+ 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<2; list++){ //FIXME try list_count
+ 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];
+ 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].field_poc[0];
+ field[1] = field[0];
+ for(j=0; j<3; j++)
+ field[1].data[j] += frame->linesize[j];
+ field[1].reference = PICT_BOTTOM_FIELD;
+ field[1].poc= field[1].field_poc[1];
+
+ h->luma_weight[list][16+2*i] = h->luma_weight[list][16+2*i+1] = h->luma_weight[list][i];
+ h->luma_offset[list][16+2*i] = h->luma_offset[list][16+2*i+1] = h->luma_offset[list][i];
+ for(j=0; j<2; j++){
+ h->chroma_weight[list][16+2*i][j] = h->chroma_weight[list][16+2*i+1][j] = h->chroma_weight[list][i][j];
+ h->chroma_offset[list][16+2*i][j] = h->chroma_offset[list][16+2*i+1][j] = h->chroma_offset[list][i][j];
+ }
+ }
+ }
+ for(j=0; j<h->ref_count[1]; j++){
+ for(i=0; i<h->ref_count[0]; i++)
+ h->implicit_weight[j][16+2*i] = h->implicit_weight[j][16+2*i+1] = h->implicit_weight[j][i];
+ memcpy(h->implicit_weight[16+2*j], h->implicit_weight[j], sizeof(*h->implicit_weight));
+ memcpy(h->implicit_weight[16+2*j+1], h->implicit_weight[j], sizeof(*h->implicit_weight));
+ }
+}
+
+/**
+ * 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){
+ MpegEncContext * const s = &h->s;
+ int i;
+
+ for(i=0; i<h->short_ref_count; i++){
+ Picture *pic= h->short_ref[i];
+ if(s->avctx->debug&FF_DEBUG_MMCO)
+ av_log(h->s.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){
+ MpegEncContext * const s = &h->s;
+ Picture *pic;
+ int i;
+
+ if(s->avctx->debug&FF_DEBUG_MMCO)
+ av_log(h->s.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;
+}
+
+/**
+ * print short term list
+ */
+static void print_short_term(H264Context *h) {
+ uint32_t i;
+ if(h->s.avctx->debug&FF_DEBUG_MMCO) {
+ av_log(h->s.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->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", i, pic->frame_num, pic->poc, pic->data[0]);
+ }
+ }
+}
+
+/**
+ * print long term list
+ */
+static void print_long_term(H264Context *h) {
+ uint32_t i;
+ if(h->s.avctx->debug&FF_DEBUG_MMCO) {
+ av_log(h->s.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->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", i, pic->frame_num, pic->poc, pic->data[0]);
+ }
+ }
+ }
+}
+
+int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count){
+ MpegEncContext * const s = &h->s;
+ int i, av_uninit(j);
+ int current_ref_assigned=0;
+ Picture *av_uninit(pic);
+
+ if((s->avctx->debug&FF_DEBUG_MMCO) && mmco_count==0)
+ av_log(h->s.avctx, AV_LOG_DEBUG, "no mmco here\n");
+
+ for(i=0; i<mmco_count; i++){
+ int av_uninit(structure), av_uninit(frame_num);
+ if(s->avctx->debug&FF_DEBUG_MMCO)
+ av_log(h->s.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->s.avctx, AV_LOG_ERROR, "mmco: unref short failure\n");
+ continue;
+ }
+ }
+
+ switch(mmco[i].opcode){
+ case MMCO_SHORT2UNUSED:
+ if(s->avctx->debug&FF_DEBUG_MMCO)
+ av_log(h->s.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(s->avctx->debug&FF_DEBUG_MMCO)
+ av_log(h->s.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] != s->current_picture_ptr) {
+ remove_long(h, mmco[i].long_arg, 0);
+
+ h->long_ref[ mmco[i].long_arg ]= s->current_picture_ptr;
+ h->long_ref[ mmco[i].long_arg ]->long_ref=1;
+ h->long_ref_count++;
+ }
+
+ s->current_picture_ptr->reference |= s->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);
+ }
+ s->current_picture_ptr->poc=
+ s->current_picture_ptr->field_poc[0]=
+ s->current_picture_ptr->field_poc[1]=
+ h->poc_lsb=
+ h->poc_msb=
+ h->frame_num=
+ s->current_picture_ptr->frame_num= 0;
+ s->current_picture_ptr->mmco_reset=1;
+ 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] == s->current_picture_ptr) {
+ /* Just mark the second field valid */
+ s->current_picture_ptr->reference = PICT_FRAME;
+ } else if (s->current_picture_ptr->long_ref) {
+ av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term reference "
+ "assignment for second field "
+ "in complementary field pair "
+ "(first field is long term)\n");
+ } else {
+ pic= remove_short(h, s->current_picture_ptr->frame_num, 0);
+ if(pic){
+ av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term buffer state detected\n");
+ }
+
+ if(h->short_ref_count)
+ memmove(&h->short_ref[1], &h->short_ref[0], h->short_ref_count*sizeof(Picture*));
+
+ h->short_ref[0]= s->current_picture_ptr;
+ h->short_ref_count++;
+ s->current_picture_ptr->reference |= s->picture_structure;
+ }
+ }
+
+ if (h->long_ref_count + h->short_ref_count > h->sps.ref_frame_count){
+
+ /* 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->s.avctx, AV_LOG_ERROR,
+ "number of reference frames exceeds max (probably "
+ "corrupt input), discarding one\n");
+
+ 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);
+ return 0;
+}
+
+int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb){
+ MpegEncContext * const s = &h->s;
+ int i;
+
+ h->mmco_index= 0;
+ if(h->nal_unit_type == NAL_IDR_SLICE){ //FIXME fields
+ s->broken_link= get_bits1(gb) -1;
+ if(get_bits1(gb)){
+ h->mmco[0].opcode= MMCO_LONG;
+ h->mmco[0].long_arg= 0;
+ h->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);
+
+ h->mmco[i].opcode= opcode;
+ if(opcode==MMCO_SHORT2UNUSED || opcode==MMCO_SHORT2LONG){
+ h->mmco[i].short_pic_num= (h->curr_pic_num - get_ue_golomb(gb) - 1) & (h->max_pic_num - 1);
+/* if(h->mmco[i].short_pic_num >= h->short_ref_count || h->short_ref[ h->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;
+ }*/
+ }
+ 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_LONG2UNUSED && FIELD_PICTURE))){
+ av_log(h->s.avctx, AV_LOG_ERROR, "illegal long ref in memory management control operation %d\n", opcode);
+ return -1;
+ }
+ h->mmco[i].long_arg= long_arg;
+ }
+
+ if(opcode > (unsigned)MMCO_LONG){
+ av_log(h->s.avctx, AV_LOG_ERROR, "illegal memory management control operation %d\n", opcode);
+ return -1;
+ }
+ if(opcode == MMCO_END)
+ break;
+ }
+ h->mmco_index= i;
+ }else{
+ assert(h->long_ref_count + h->short_ref_count <= h->sps.ref_frame_count);
+
+ if(h->short_ref_count && h->long_ref_count + h->short_ref_count == h->sps.ref_frame_count &&
+ !(FIELD_PICTURE && !s->first_field && s->current_picture_ptr->reference)) {
+ h->mmco[0].opcode= MMCO_SHORT2UNUSED;
+ h->mmco[0].short_pic_num= h->short_ref[ h->short_ref_count - 1 ]->frame_num;
+ h->mmco_index= 1;
+ if (FIELD_PICTURE) {
+ h->mmco[0].short_pic_num *= 2;
+ h->mmco[1].opcode= MMCO_SHORT2UNUSED;
+ h->mmco[1].short_pic_num= h->mmco[0].short_pic_num + 1;
+ h->mmco_index= 2;
+ }
+ }
+ }
+ }
+
+ return 0;
+}
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