/src/vlc/contrib/contrib-build/bpg/libavcodec/hevc_refs.c

Source
/*
 * HEVC video decoder
 *
 * Copyright (C) 2012 - 2013 Guillaume Martres
 * Copyright (C) 2012 - 2013 Gildas Cocherel
 *
 * 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
 */

#include "libavutil/pixdesc.h"

#include "internal.h"
#include "thread.h"
#include "hevc.h"

void ff_hevc_unref_frame(HEVCContext *s, HEVCFrame *frame, int flags)
{
    /* frame->frame can be NULL if context init failed */
    if (!frame->frame || !frame->frame->buf[0])
        return;

    frame->flags &= ~flags;
    if (!frame->flags) {
        ff_thread_release_buffer(s->avctx, &frame->tf);

#ifdef USE_PRED
        av_buffer_unref(&frame->tab_mvf_buf);
        frame->tab_mvf = NULL;
        av_buffer_unref(&frame->rpl_buf);
        av_buffer_unref(&frame->rpl_tab_buf);
        frame->rpl_tab    = NULL;
        frame->refPicList = NULL;
#endif

        frame->collocated_ref = NULL;
    }
}

#ifdef USE_PRED
RefPicList *ff_hevc_get_ref_list(HEVCContext *s, HEVCFrame *ref, int x0, int y0)
{
    int x_cb         = x0 >> s->sps->log2_ctb_size;
    int y_cb         = y0 >> s->sps->log2_ctb_size;
    int pic_width_cb = s->sps->ctb_width;
    int ctb_addr_ts  = s->pps->ctb_addr_rs_to_ts[y_cb * pic_width_cb + x_cb];
    return (RefPicList *)ref->rpl_tab[ctb_addr_ts];
}
#endif

void ff_hevc_clear_refs(HEVCContext *s)
{
    int i;
    for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
        ff_hevc_unref_frame(s, &s->DPB[i],
                            HEVC_FRAME_FLAG_SHORT_REF |
                            HEVC_FRAME_FLAG_LONG_REF);
}

void ff_hevc_flush_dpb(HEVCContext *s)
{
    int i;
    for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
        ff_hevc_unref_frame(s, &s->DPB[i], ~0);
}

static HEVCFrame *alloc_frame(HEVCContext *s)
{
    int i, j, ret;
    for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
        HEVCFrame *frame = &s->DPB[i];
        if (frame->frame->buf[0])
            continue;

        ret = ff_thread_get_buffer(s->avctx, &frame->tf,
                                   AV_GET_BUFFER_FLAG_REF);
        if (ret < 0)
            return NULL;

        frame->ctb_count = s->sps->ctb_width * s->sps->ctb_height;
#ifdef USE_PRED
        frame->rpl_buf = av_buffer_allocz(s->nb_nals * sizeof(RefPicListTab));
        if (!frame->rpl_buf)
            goto fail;

        frame->tab_mvf_buf = av_buffer_pool_get(s->tab_mvf_pool);
        if (!frame->tab_mvf_buf)
            goto fail;
        frame->tab_mvf = (MvField *)frame->tab_mvf_buf->data;

        frame->rpl_tab_buf = av_buffer_pool_get(s->rpl_tab_pool);
        if (!frame->rpl_tab_buf)
            goto fail;
        frame->rpl_tab   = (RefPicListTab **)frame->rpl_tab_buf->data;
        for (j = 0; j < frame->ctb_count; j++)
            frame->rpl_tab[j] = (RefPicListTab *)frame->rpl_buf->data;
#endif

        frame->frame->top_field_first  = s->picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD;
        frame->frame->interlaced_frame = (s->picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD) || (s->picture_struct == AV_PICTURE_STRUCTURE_BOTTOM_FIELD);
        return frame;
fail:
        ff_hevc_unref_frame(s, frame, ~0);
        return NULL;
    }
    av_log(s->avctx, AV_LOG_ERROR, "Error allocating frame, DPB full.\n");
    return NULL;
}

int ff_hevc_set_new_ref(HEVCContext *s, AVFrame **frame, int poc)
{
    HEVCFrame *ref;
    int i;

    /* check that this POC doesn't already exist */
    for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
        HEVCFrame *frame = &s->DPB[i];

        if (frame->frame->buf[0] && frame->sequence == s->seq_decode &&
            frame->poc == poc) {
            av_log(s->avctx, AV_LOG_ERROR, "Duplicate POC in a sequence: %d.\n",
                   poc);
            return AVERROR_INVALIDDATA;
        }
    }

    ref = alloc_frame(s);
    if (!ref)
        return AVERROR(ENOMEM);

    *frame = ref->frame;
    s->ref = ref;

    if (s->sh.pic_output_flag)
        ref->flags = HEVC_FRAME_FLAG_OUTPUT | HEVC_FRAME_FLAG_SHORT_REF;
    else
        ref->flags = HEVC_FRAME_FLAG_SHORT_REF;

    ref->poc      = poc;
    ref->sequence = s->seq_decode;
    ref->window   = s->sps->output_window;

    return 0;
}

int ff_hevc_output_frame(HEVCContext *s, AVFrame *out, int flush)
{
    do {
        int nb_output = 0;
        int min_poc   = INT_MAX;
        int i, min_idx, ret;

        if (s->sh.no_output_of_prior_pics_flag == 1) {
            for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
                HEVCFrame *frame = &s->DPB[i];
                if (!(frame->flags & HEVC_FRAME_FLAG_BUMPING) && frame->poc != s->poc &&
                        frame->sequence == s->seq_output) {
                    ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT);
                }
            }
        }

        for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
            HEVCFrame *frame = &s->DPB[i];
            if ((frame->flags & HEVC_FRAME_FLAG_OUTPUT) &&
                frame->sequence == s->seq_output) {
                nb_output++;
                if (frame->poc < min_poc) {
                    min_poc = frame->poc;
                    min_idx = i;
                }
            }
        }

        /* wait for more frames before output */
        if (!flush && s->seq_output == s->seq_decode && s->sps &&
            nb_output <= s->sps->temporal_layer[s->sps->max_sub_layers - 1].num_reorder_pics)
            return 0;

        if (nb_output) {
            HEVCFrame *frame = &s->DPB[min_idx];
            AVFrame *src = frame->frame;

            ret = av_frame_ref(out, src);
            if (frame->flags & HEVC_FRAME_FLAG_BUMPING)
                ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT | HEVC_FRAME_FLAG_BUMPING);
            else
                ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT);
            if (ret < 0)
                return ret;

#ifndef USE_MSPS
            {
                AVFrame *dst = out;
                const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(src->format);
                int pixel_shift = !!(desc->comp[0].depth_minus1 > 7);
                for (i = 0; i < 3; i++) {
                    int hshift = (i > 0) ? desc->log2_chroma_w : 0;
                    int vshift = (i > 0) ? desc->log2_chroma_h : 0;
                    int off = ((frame->window.left_offset >> hshift) << pixel_shift) +
                        (frame->window.top_offset   >> vshift) * dst->linesize[i];
                    dst->data[i] += off;
                }
                av_log(s->avctx, AV_LOG_DEBUG,
                       "Output frame with POC %d.\n", frame->poc);
            }
#endif
            return 1;
        }

        if (s->seq_output != s->seq_decode)
            s->seq_output = (s->seq_output + 1) & 0xff;
        else
            break;
    } while (1);

    return 0;
}

#ifdef USE_PRED
void ff_hevc_bump_frame(HEVCContext *s)
{
    int dpb = 0;
    int min_poc = INT_MAX;
    int i;

    for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
        HEVCFrame *frame = &s->DPB[i];
        if ((frame->flags) &&
            frame->sequence == s->seq_output &&
            frame->poc != s->poc) {
            dpb++;
        }
    }

    if (s->sps && dpb >= s->sps->temporal_layer[s->sps->max_sub_layers - 1].max_dec_pic_buffering) {
        for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
            HEVCFrame *frame = &s->DPB[i];
            if ((frame->flags) &&
                frame->sequence == s->seq_output &&
                frame->poc != s->poc) {
                if (frame->flags == HEVC_FRAME_FLAG_OUTPUT && frame->poc < min_poc) {
                    min_poc = frame->poc;
                }
            }
        }

        for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
            HEVCFrame *frame = &s->DPB[i];
            if (frame->flags & HEVC_FRAME_FLAG_OUTPUT &&
                frame->sequence == s->seq_output &&
                frame->poc <= min_poc) {
                frame->flags |= HEVC_FRAME_FLAG_BUMPING;
            }
        }

        dpb--;
    }
}

static int init_slice_rpl(HEVCContext *s)
{
    HEVCFrame *frame = s->ref;
    int ctb_count    = frame->ctb_count;
    int ctb_addr_ts  = s->pps->ctb_addr_rs_to_ts[s->sh.slice_segment_addr];
    int i;

    if (s->slice_idx >= frame->rpl_buf->size / sizeof(RefPicListTab))
        return AVERROR_INVALIDDATA;

    for (i = ctb_addr_ts; i < ctb_count; i++)
        frame->rpl_tab[i] = (RefPicListTab *)frame->rpl_buf->data + s->slice_idx;

    frame->refPicList = (RefPicList *)frame->rpl_tab[ctb_addr_ts];

    return 0;
}

int ff_hevc_slice_rpl(HEVCContext *s)
{
    SliceHeader *sh = &s->sh;

    uint8_t nb_list = sh->slice_type == B_SLICE ? 2 : 1;
    uint8_t list_idx;
    int i, j, ret;

    ret = init_slice_rpl(s);
    if (ret < 0)
        return ret;

    if (!(s->rps[ST_CURR_BEF].nb_refs + s->rps[ST_CURR_AFT].nb_refs +
          s->rps[LT_CURR].nb_refs)) {
        av_log(s->avctx, AV_LOG_ERROR, "Zero refs in the frame RPS.\n");
        return AVERROR_INVALIDDATA;
    }

    for (list_idx = 0; list_idx < nb_list; list_idx++) {
        RefPicList  rpl_tmp = { { 0 } };
        RefPicList *rpl     = &s->ref->refPicList[list_idx];

        /* The order of the elements is
         * ST_CURR_BEF - ST_CURR_AFT - LT_CURR for the L0 and
         * ST_CURR_AFT - ST_CURR_BEF - LT_CURR for the L1 */
        int cand_lists[3] = { list_idx ? ST_CURR_AFT : ST_CURR_BEF,
                              list_idx ? ST_CURR_BEF : ST_CURR_AFT,
                              LT_CURR };

        /* concatenate the candidate lists for the current frame */
        while (rpl_tmp.nb_refs < sh->nb_refs[list_idx]) {
            for (i = 0; i < FF_ARRAY_ELEMS(cand_lists); i++) {
                RefPicList *rps = &s->rps[cand_lists[i]];
                for (j = 0; j < rps->nb_refs && rpl_tmp.nb_refs < MAX_REFS; j++) {
                    rpl_tmp.list[rpl_tmp.nb_refs]       = rps->list[j];
                    rpl_tmp.ref[rpl_tmp.nb_refs]        = rps->ref[j];
                    rpl_tmp.isLongTerm[rpl_tmp.nb_refs] = i == 2;
                    rpl_tmp.nb_refs++;
                }
            }
        }

        /* reorder the references if necessary */
        if (sh->rpl_modification_flag[list_idx]) {
            for (i = 0; i < sh->nb_refs[list_idx]; i++) {
                int idx = sh->list_entry_lx[list_idx][i];

                if (idx >= rpl_tmp.nb_refs) {
                    av_log(s->avctx, AV_LOG_ERROR, "Invalid reference index.\n");
                    return AVERROR_INVALIDDATA;
                }

                rpl->list[i]       = rpl_tmp.list[idx];
                rpl->ref[i]        = rpl_tmp.ref[idx];
                rpl->isLongTerm[i] = rpl_tmp.isLongTerm[idx];
                rpl->nb_refs++;
            }
        } else {
            memcpy(rpl, &rpl_tmp, sizeof(*rpl));
            rpl->nb_refs = FFMIN(rpl->nb_refs, sh->nb_refs[list_idx]);
        }

        if (sh->collocated_list == list_idx &&
            sh->collocated_ref_idx < rpl->nb_refs)
            s->ref->collocated_ref = rpl->ref[sh->collocated_ref_idx];
    }

    return 0;
}

static HEVCFrame *find_ref_idx(HEVCContext *s, int poc)
{
    int i;
    int LtMask = (1 << s->sps->log2_max_poc_lsb) - 1;

    for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
        HEVCFrame *ref = &s->DPB[i];
        if (ref->frame->buf[0] && (ref->sequence == s->seq_decode)) {
            if ((ref->poc & LtMask) == poc)
                return ref;
        }
    }

    for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
        HEVCFrame *ref = &s->DPB[i];
        if (ref->frame->buf[0] && ref->sequence == s->seq_decode) {
            if (ref->poc == poc || (ref->poc & LtMask) == poc)
                return ref;
        }
    }

    av_log(s->avctx, AV_LOG_ERROR,
           "Could not find ref with POC %d\n", poc);
    return NULL;
}

static void mark_ref(HEVCFrame *frame, int flag)
{
    frame->flags &= ~(HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF);
    frame->flags |= flag;
}

static HEVCFrame *generate_missing_ref(HEVCContext *s, int poc)
{
    HEVCFrame *frame;
    int i, x, y;

    frame = alloc_frame(s);
    if (!frame)
        return NULL;

    if (!s->sps->pixel_shift) {
        for (i = 0; frame->frame->buf[i]; i++)
            memset(frame->frame->buf[i]->data, 1 << (s->sps->bit_depth - 1),
                   frame->frame->buf[i]->size);
    } else {
        for (i = 0; frame->frame->data[i]; i++)
            for (y = 0; y < (s->sps->height >> s->sps->vshift[i]); y++)
                for (x = 0; x < (s->sps->width >> s->sps->hshift[i]); x++) {
                    AV_WN16(frame->frame->data[i] + y * frame->frame->linesize[i] + 2 * x,
                            1 << (s->sps->bit_depth - 1));
                }
    }

    frame->poc      = poc;
    frame->sequence = s->seq_decode;
    frame->flags    = 0;

    if (s->threads_type == FF_THREAD_FRAME)
        ff_thread_report_progress(&frame->tf, INT_MAX, 0);

    return frame;
}

/* add a reference with the given poc to the list and mark it as used in DPB */
static int add_candidate_ref(HEVCContext *s, RefPicList *list,
                             int poc, int ref_flag)
{
    HEVCFrame *ref = find_ref_idx(s, poc);

    if (ref == s->ref)
        return AVERROR_INVALIDDATA;

    if (!ref) {
        ref = generate_missing_ref(s, poc);
        if (!ref)
            return AVERROR(ENOMEM);
    }

    list->list[list->nb_refs] = ref->poc;
    list->ref[list->nb_refs]  = ref;
    list->nb_refs++;

    mark_ref(ref, ref_flag);
    return 0;
}

int ff_hevc_frame_rps(HEVCContext *s)
{
    const ShortTermRPS *short_rps = s->sh.short_term_rps;
    const LongTermRPS  *long_rps  = &s->sh.long_term_rps;
    RefPicList               *rps = s->rps;
    int i, ret;

    if (!short_rps) {
        rps[0].nb_refs = rps[1].nb_refs = 0;
        return 0;
    }

    /* clear the reference flags on all frames except the current one */
    for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
        HEVCFrame *frame = &s->DPB[i];

        if (frame == s->ref)
            continue;

        mark_ref(frame, 0);
    }

    for (i = 0; i < NB_RPS_TYPE; i++)
        rps[i].nb_refs = 0;

    /* add the short refs */
    for (i = 0; i < short_rps->num_delta_pocs; i++) {
        int poc = s->poc + short_rps->delta_poc[i];
        int list;

        if (!short_rps->used[i])
            list = ST_FOLL;
        else if (i < short_rps->num_negative_pics)
            list = ST_CURR_BEF;
        else
            list = ST_CURR_AFT;

        ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_SHORT_REF);
        if (ret < 0)
            return ret;
    }

    /* add the long refs */
    for (i = 0; i < long_rps->nb_refs; i++) {
        int poc  = long_rps->poc[i];
        int list = long_rps->used[i] ? LT_CURR : LT_FOLL;

        ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_LONG_REF);
        if (ret < 0)
            return ret;
    }

    /* release any frames that are now unused */
    for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
        ff_hevc_unref_frame(s, &s->DPB[i], 0);

    return 0;
}

int ff_hevc_compute_poc(HEVCContext *s, int poc_lsb)
{
    int max_poc_lsb  = 1 << s->sps->log2_max_poc_lsb;
    int prev_poc_lsb = s->pocTid0 % max_poc_lsb;
    int prev_poc_msb = s->pocTid0 - prev_poc_lsb;
    int poc_msb;

    if (poc_lsb < prev_poc_lsb && prev_poc_lsb - poc_lsb >= max_poc_lsb / 2)
        poc_msb = prev_poc_msb + max_poc_lsb;
    else if (poc_lsb > prev_poc_lsb && poc_lsb - prev_poc_lsb > max_poc_lsb / 2)
        poc_msb = prev_poc_msb - max_poc_lsb;
    else
        poc_msb = prev_poc_msb;

    // For BLA picture types, POCmsb is set to 0.
    if (s->nal_unit_type == NAL_BLA_W_LP   ||
        s->nal_unit_type == NAL_BLA_W_RADL ||
        s->nal_unit_type == NAL_BLA_N_LP)
        poc_msb = 0;

    return poc_msb + poc_lsb;
}

int ff_hevc_frame_nb_refs(HEVCContext *s)
{
    int ret = 0;
    int i;
    const ShortTermRPS *rps = s->sh.short_term_rps;
    LongTermRPS *long_rps   = &s->sh.long_term_rps;

    if (rps) {
        for (i = 0; i < rps->num_negative_pics; i++)
            ret += !!rps->used[i];
        for (; i < rps->num_delta_pocs; i++)
            ret += !!rps->used[i];
    }

    if (long_rps) {
        for (i = 0; i < long_rps->nb_refs; i++)
            ret += !!long_rps->used[i];
    }
    return ret;
}
#endif

Coverage Report

Created: 2026-08-13 07:43

Line	Count	Source
1		/*
2		* HEVC video decoder
3		*
4		* Copyright (C) 2012 - 2013 Guillaume Martres
5		* Copyright (C) 2012 - 2013 Gildas Cocherel
6		*
7		* This file is part of FFmpeg.
8		*
9		* FFmpeg is free software; you can redistribute it and/or
10		* modify it under the terms of the GNU Lesser General Public
11		* License as published by the Free Software Foundation; either
12		* version 2.1 of the License, or (at your option) any later version.
13		*
14		* FFmpeg is distributed in the hope that it will be useful,
15		* but WITHOUT ANY WARRANTY; without even the implied warranty of
16		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17		* Lesser General Public License for more details.
18		*
19		* You should have received a copy of the GNU Lesser General Public
20		* License along with FFmpeg; if not, write to the Free Software
21		* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22		*/
23
24		#include "libavutil/pixdesc.h"
25
26		#include "internal.h"
27		#include "thread.h"
28		#include "hevc.h"
29
30		void ff_hevc_unref_frame(HEVCContext s, HEVCFrame frame, int flags)
31	0	{
32		/* frame->frame can be NULL if context init failed */
33	0	if (!frame->frame \|\| !frame->frame->buf[0])
34	0	return;
35
36	0	frame->flags &= ~flags;
37	0	if (!frame->flags) {
38	0	ff_thread_release_buffer(s->avctx, &frame->tf);
39
40	0	#ifdef USE_PRED
41	0	av_buffer_unref(&frame->tab_mvf_buf);
42	0	frame->tab_mvf = NULL;
43	0	av_buffer_unref(&frame->rpl_buf);
44	0	av_buffer_unref(&frame->rpl_tab_buf);
45	0	frame->rpl_tab = NULL;
46	0	frame->refPicList = NULL;
47	0	#endif
48
49	0	frame->collocated_ref = NULL;
50	0	}
51	0	}
52
53		#ifdef USE_PRED
54		RefPicList ff_hevc_get_ref_list(HEVCContext s, HEVCFrame *ref, int x0, int y0)
55	0	{
56	0	int x_cb = x0 >> s->sps->log2_ctb_size;
57	0	int y_cb = y0 >> s->sps->log2_ctb_size;
58	0	int pic_width_cb = s->sps->ctb_width;
59	0	int ctb_addr_ts = s->pps->ctb_addr_rs_to_ts[y_cb * pic_width_cb + x_cb];
60	0	return (RefPicList *)ref->rpl_tab[ctb_addr_ts];
61	0	}
62		#endif
63
64		void ff_hevc_clear_refs(HEVCContext *s)
65	0	{
66	0	int i;
67	0	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
68	0	ff_hevc_unref_frame(s, &s->DPB[i],
69	0	HEVC_FRAME_FLAG_SHORT_REF \|
70	0	HEVC_FRAME_FLAG_LONG_REF);
71	0	}
72
73		void ff_hevc_flush_dpb(HEVCContext *s)
74	0	{
75	0	int i;
76	0	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
77	0	ff_hevc_unref_frame(s, &s->DPB[i], ~0);
78	0	}
79
80		static HEVCFrame alloc_frame(HEVCContext s)
81	0	{
82	0	int i, j, ret;
83	0	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
84	0	HEVCFrame *frame = &s->DPB[i];
85	0	if (frame->frame->buf[0])
86	0	continue;
87
88	0	ret = ff_thread_get_buffer(s->avctx, &frame->tf,
89	0	AV_GET_BUFFER_FLAG_REF);
90	0	if (ret < 0)
91	0	return NULL;
92
93	0	frame->ctb_count = s->sps->ctb_width * s->sps->ctb_height;
94	0	#ifdef USE_PRED
95	0	frame->rpl_buf = av_buffer_allocz(s->nb_nals * sizeof(RefPicListTab));
96	0	if (!frame->rpl_buf)
97	0	goto fail;
98
99	0	frame->tab_mvf_buf = av_buffer_pool_get(s->tab_mvf_pool);
100	0	if (!frame->tab_mvf_buf)
101	0	goto fail;
102	0	frame->tab_mvf = (MvField *)frame->tab_mvf_buf->data;
103
104	0	frame->rpl_tab_buf = av_buffer_pool_get(s->rpl_tab_pool);
105	0	if (!frame->rpl_tab_buf)
106	0	goto fail;
107	0	frame->rpl_tab = (RefPicListTab **)frame->rpl_tab_buf->data;
108	0	for (j = 0; j < frame->ctb_count; j++)
109	0	frame->rpl_tab[j] = (RefPicListTab *)frame->rpl_buf->data;
110	0	#endif
111
112	0	frame->frame->top_field_first = s->picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD;
113	0	frame->frame->interlaced_frame = (s->picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD) \|\| (s->picture_struct == AV_PICTURE_STRUCTURE_BOTTOM_FIELD);
114	0	return frame;
115	0	fail:
116	0	ff_hevc_unref_frame(s, frame, ~0);
117	0	return NULL;
118	0	}
119	0	av_log(s->avctx, AV_LOG_ERROR, "Error allocating frame, DPB full.\n");
120	0	return NULL;
121	0	}
122
123		int ff_hevc_set_new_ref(HEVCContext s, AVFrame *frame, int poc)
124	0	{
125	0	HEVCFrame *ref;
126	0	int i;
127
128		/* check that this POC doesn't already exist */
129	0	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
130	0	HEVCFrame *frame = &s->DPB[i];
131
132	0	if (frame->frame->buf[0] && frame->sequence == s->seq_decode &&
133	0	frame->poc == poc) {
134	0	av_log(s->avctx, AV_LOG_ERROR, "Duplicate POC in a sequence: %d.\n",
135	0	poc);
136	0	return AVERROR_INVALIDDATA;
137	0	}
138	0	}
139
140	0	ref = alloc_frame(s);
141	0	if (!ref)
142	0	return AVERROR(ENOMEM);
143
144	0	*frame = ref->frame;
145	0	s->ref = ref;
146
147	0	if (s->sh.pic_output_flag)
148	0	ref->flags = HEVC_FRAME_FLAG_OUTPUT \| HEVC_FRAME_FLAG_SHORT_REF;
149	0	else
150	0	ref->flags = HEVC_FRAME_FLAG_SHORT_REF;
151
152	0	ref->poc = poc;
153	0	ref->sequence = s->seq_decode;
154	0	ref->window = s->sps->output_window;
155
156	0	return 0;
157	0	}
158
159		int ff_hevc_output_frame(HEVCContext s, AVFrame out, int flush)
160	0	{
161	0	do {
162	0	int nb_output = 0;
163	0	int min_poc = INT_MAX;
164	0	int i, min_idx, ret;
165
166	0	if (s->sh.no_output_of_prior_pics_flag == 1) {
167	0	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
168	0	HEVCFrame *frame = &s->DPB[i];
169	0	if (!(frame->flags & HEVC_FRAME_FLAG_BUMPING) && frame->poc != s->poc &&
170	0	frame->sequence == s->seq_output) {
171	0	ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT);
172	0	}
173	0	}
174	0	}
175
176	0	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
177	0	HEVCFrame *frame = &s->DPB[i];
178	0	if ((frame->flags & HEVC_FRAME_FLAG_OUTPUT) &&
179	0	frame->sequence == s->seq_output) {
180	0	nb_output++;
181	0	if (frame->poc < min_poc) {
182	0	min_poc = frame->poc;
183	0	min_idx = i;
184	0	}
185	0	}
186	0	}
187
188		/* wait for more frames before output */
189	0	if (!flush && s->seq_output == s->seq_decode && s->sps &&
190	0	nb_output <= s->sps->temporal_layer[s->sps->max_sub_layers - 1].num_reorder_pics)
191	0	return 0;
192
193	0	if (nb_output) {
194	0	HEVCFrame *frame = &s->DPB[min_idx];
195	0	AVFrame *src = frame->frame;
196
197	0	ret = av_frame_ref(out, src);
198	0	if (frame->flags & HEVC_FRAME_FLAG_BUMPING)
199	0	ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT \| HEVC_FRAME_FLAG_BUMPING);
200	0	else
201	0	ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT);
202	0	if (ret < 0)
203	0	return ret;
204
205		#ifndef USE_MSPS
206		{
207		AVFrame *dst = out;
208		const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(src->format);
209		int pixel_shift = !!(desc->comp[0].depth_minus1 > 7);
210		for (i = 0; i < 3; i++) {
211		int hshift = (i > 0) ? desc->log2_chroma_w : 0;
212		int vshift = (i > 0) ? desc->log2_chroma_h : 0;
213		int off = ((frame->window.left_offset >> hshift) << pixel_shift) +
214		(frame->window.top_offset >> vshift) * dst->linesize[i];
215		dst->data[i] += off;
216		}
217		av_log(s->avctx, AV_LOG_DEBUG,
218		"Output frame with POC %d.\n", frame->poc);
219		}
220		#endif
221	0	return 1;
222	0	}
223
224	0	if (s->seq_output != s->seq_decode)
225	0	s->seq_output = (s->seq_output + 1) & 0xff;
226	0	else
227	0	break;
228	0	} while (1);
229
230	0	return 0;
231	0	}
232
233		#ifdef USE_PRED
234		void ff_hevc_bump_frame(HEVCContext *s)
235	0	{
236	0	int dpb = 0;
237	0	int min_poc = INT_MAX;
238	0	int i;
239
240	0	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
241	0	HEVCFrame *frame = &s->DPB[i];
242	0	if ((frame->flags) &&
243	0	frame->sequence == s->seq_output &&
244	0	frame->poc != s->poc) {
245	0	dpb++;
246	0	}
247	0	}
248
249	0	if (s->sps && dpb >= s->sps->temporal_layer[s->sps->max_sub_layers - 1].max_dec_pic_buffering) {
250	0	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
251	0	HEVCFrame *frame = &s->DPB[i];
252	0	if ((frame->flags) &&
253	0	frame->sequence == s->seq_output &&
254	0	frame->poc != s->poc) {
255	0	if (frame->flags == HEVC_FRAME_FLAG_OUTPUT && frame->poc < min_poc) {
256	0	min_poc = frame->poc;
257	0	}
258	0	}
259	0	}
260
261	0	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
262	0	HEVCFrame *frame = &s->DPB[i];
263	0	if (frame->flags & HEVC_FRAME_FLAG_OUTPUT &&
264	0	frame->sequence == s->seq_output &&
265	0	frame->poc <= min_poc) {
266	0	frame->flags \|= HEVC_FRAME_FLAG_BUMPING;
267	0	}
268	0	}
269
270	0	dpb--;
271	0	}
272	0	}
273
274		static int init_slice_rpl(HEVCContext *s)
275	0	{
276	0	HEVCFrame *frame = s->ref;
277	0	int ctb_count = frame->ctb_count;
278	0	int ctb_addr_ts = s->pps->ctb_addr_rs_to_ts[s->sh.slice_segment_addr];
279	0	int i;
280
281	0	if (s->slice_idx >= frame->rpl_buf->size / sizeof(RefPicListTab))
282	0	return AVERROR_INVALIDDATA;
283
284	0	for (i = ctb_addr_ts; i < ctb_count; i++)
285	0	frame->rpl_tab[i] = (RefPicListTab *)frame->rpl_buf->data + s->slice_idx;
286
287	0	frame->refPicList = (RefPicList *)frame->rpl_tab[ctb_addr_ts];
288
289	0	return 0;
290	0	}
291
292		int ff_hevc_slice_rpl(HEVCContext *s)
293	0	{
294	0	SliceHeader *sh = &s->sh;
295
296	0	uint8_t nb_list = sh->slice_type == B_SLICE ? 2 : 1;
297	0	uint8_t list_idx;
298	0	int i, j, ret;
299
300	0	ret = init_slice_rpl(s);
301	0	if (ret < 0)
302	0	return ret;
303
304	0	if (!(s->rps[ST_CURR_BEF].nb_refs + s->rps[ST_CURR_AFT].nb_refs +
305	0	s->rps[LT_CURR].nb_refs)) {
306	0	av_log(s->avctx, AV_LOG_ERROR, "Zero refs in the frame RPS.\n");
307	0	return AVERROR_INVALIDDATA;
308	0	}
309
310	0	for (list_idx = 0; list_idx < nb_list; list_idx++) {
311	0	RefPicList rpl_tmp = { { 0 } };
312	0	RefPicList *rpl = &s->ref->refPicList[list_idx];
313
314		/* The order of the elements is
315		* ST_CURR_BEF - ST_CURR_AFT - LT_CURR for the L0 and
316		* ST_CURR_AFT - ST_CURR_BEF - LT_CURR for the L1 */
317	0	int cand_lists[3] = { list_idx ? ST_CURR_AFT : ST_CURR_BEF,
318	0	list_idx ? ST_CURR_BEF : ST_CURR_AFT,
319	0	LT_CURR };
320
321		/* concatenate the candidate lists for the current frame */
322	0	while (rpl_tmp.nb_refs < sh->nb_refs[list_idx]) {
323	0	for (i = 0; i < FF_ARRAY_ELEMS(cand_lists); i++) {
324	0	RefPicList *rps = &s->rps[cand_lists[i]];
325	0	for (j = 0; j < rps->nb_refs && rpl_tmp.nb_refs < MAX_REFS; j++) {
326	0	rpl_tmp.list[rpl_tmp.nb_refs] = rps->list[j];
327	0	rpl_tmp.ref[rpl_tmp.nb_refs] = rps->ref[j];
328	0	rpl_tmp.isLongTerm[rpl_tmp.nb_refs] = i == 2;
329	0	rpl_tmp.nb_refs++;
330	0	}
331	0	}
332	0	}
333
334		/* reorder the references if necessary */
335	0	if (sh->rpl_modification_flag[list_idx]) {
336	0	for (i = 0; i < sh->nb_refs[list_idx]; i++) {
337	0	int idx = sh->list_entry_lx[list_idx][i];
338
339	0	if (idx >= rpl_tmp.nb_refs) {
340	0	av_log(s->avctx, AV_LOG_ERROR, "Invalid reference index.\n");
341	0	return AVERROR_INVALIDDATA;
342	0	}
343
344	0	rpl->list[i] = rpl_tmp.list[idx];
345	0	rpl->ref[i] = rpl_tmp.ref[idx];
346	0	rpl->isLongTerm[i] = rpl_tmp.isLongTerm[idx];
347	0	rpl->nb_refs++;
348	0	}
349	0	} else {
350	0	memcpy(rpl, &rpl_tmp, sizeof(*rpl));
351	0	rpl->nb_refs = FFMIN(rpl->nb_refs, sh->nb_refs[list_idx]);
352	0	}
353
354	0	if (sh->collocated_list == list_idx &&
355	0	sh->collocated_ref_idx < rpl->nb_refs)
356	0	s->ref->collocated_ref = rpl->ref[sh->collocated_ref_idx];
357	0	}
358
359	0	return 0;
360	0	}
361
362		static HEVCFrame find_ref_idx(HEVCContext s, int poc)
363	0	{
364	0	int i;
365	0	int LtMask = (1 << s->sps->log2_max_poc_lsb) - 1;
366
367	0	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
368	0	HEVCFrame *ref = &s->DPB[i];
369	0	if (ref->frame->buf[0] && (ref->sequence == s->seq_decode)) {
370	0	if ((ref->poc & LtMask) == poc)
371	0	return ref;
372	0	}
373	0	}
374
375	0	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
376	0	HEVCFrame *ref = &s->DPB[i];
377	0	if (ref->frame->buf[0] && ref->sequence == s->seq_decode) {
378	0	if (ref->poc == poc \|\| (ref->poc & LtMask) == poc)
379	0	return ref;
380	0	}
381	0	}
382
383	0	av_log(s->avctx, AV_LOG_ERROR,
384	0	"Could not find ref with POC %d\n", poc);
385	0	return NULL;
386	0	}
387
388		static void mark_ref(HEVCFrame *frame, int flag)
389	0	{
390	0	frame->flags &= ~(HEVC_FRAME_FLAG_LONG_REF \| HEVC_FRAME_FLAG_SHORT_REF);
391	0	frame->flags \|= flag;
392	0	}
393
394		static HEVCFrame generate_missing_ref(HEVCContext s, int poc)
395	0	{
396	0	HEVCFrame *frame;
397	0	int i, x, y;
398
399	0	frame = alloc_frame(s);
400	0	if (!frame)
401	0	return NULL;
402
403	0	if (!s->sps->pixel_shift) {
404	0	for (i = 0; frame->frame->buf[i]; i++)
405	0	memset(frame->frame->buf[i]->data, 1 << (s->sps->bit_depth - 1),
406	0	frame->frame->buf[i]->size);
407	0	} else {
408	0	for (i = 0; frame->frame->data[i]; i++)
409	0	for (y = 0; y < (s->sps->height >> s->sps->vshift[i]); y++)
410	0	for (x = 0; x < (s->sps->width >> s->sps->hshift[i]); x++) {
411	0	AV_WN16(frame->frame->data[i] + y * frame->frame->linesize[i] + 2 * x,
412	0	1 << (s->sps->bit_depth - 1));
413	0	}
414	0	}
415
416	0	frame->poc = poc;
417	0	frame->sequence = s->seq_decode;
418	0	frame->flags = 0;
419
420	0	if (s->threads_type == FF_THREAD_FRAME)
421	0	ff_thread_report_progress(&frame->tf, INT_MAX, 0);
422
423	0	return frame;
424	0	}
425
426		/* add a reference with the given poc to the list and mark it as used in DPB */
427		static int add_candidate_ref(HEVCContext s, RefPicList list,
428		int poc, int ref_flag)
429	0	{
430	0	HEVCFrame *ref = find_ref_idx(s, poc);
431
432	0	if (ref == s->ref)
433	0	return AVERROR_INVALIDDATA;
434
435	0	if (!ref) {
436	0	ref = generate_missing_ref(s, poc);
437	0	if (!ref)
438	0	return AVERROR(ENOMEM);
439	0	}
440
441	0	list->list[list->nb_refs] = ref->poc;
442	0	list->ref[list->nb_refs] = ref;
443	0	list->nb_refs++;
444
445	0	mark_ref(ref, ref_flag);
446	0	return 0;
447	0	}
448
449		int ff_hevc_frame_rps(HEVCContext *s)
450	0	{
451	0	const ShortTermRPS *short_rps = s->sh.short_term_rps;
452	0	const LongTermRPS *long_rps = &s->sh.long_term_rps;
453	0	RefPicList *rps = s->rps;
454	0	int i, ret;
455
456	0	if (!short_rps) {
457	0	rps[0].nb_refs = rps[1].nb_refs = 0;
458	0	return 0;
459	0	}
460
461		/* clear the reference flags on all frames except the current one */
462	0	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
463	0	HEVCFrame *frame = &s->DPB[i];
464
465	0	if (frame == s->ref)
466	0	continue;
467
468	0	mark_ref(frame, 0);
469	0	}
470
471	0	for (i = 0; i < NB_RPS_TYPE; i++)
472	0	rps[i].nb_refs = 0;
473
474		/* add the short refs */
475	0	for (i = 0; i < short_rps->num_delta_pocs; i++) {
476	0	int poc = s->poc + short_rps->delta_poc[i];
477	0	int list;
478
479	0	if (!short_rps->used[i])
480	0	list = ST_FOLL;
481	0	else if (i < short_rps->num_negative_pics)
482	0	list = ST_CURR_BEF;
483	0	else
484	0	list = ST_CURR_AFT;
485
486	0	ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_SHORT_REF);
487	0	if (ret < 0)
488	0	return ret;
489	0	}
490
491		/* add the long refs */
492	0	for (i = 0; i < long_rps->nb_refs; i++) {
493	0	int poc = long_rps->poc[i];
494	0	int list = long_rps->used[i] ? LT_CURR : LT_FOLL;
495
496	0	ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_LONG_REF);
497	0	if (ret < 0)
498	0	return ret;
499	0	}
500
501		/* release any frames that are now unused */
502	0	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
503	0	ff_hevc_unref_frame(s, &s->DPB[i], 0);
504
505	0	return 0;
506	0	}
507
508		int ff_hevc_compute_poc(HEVCContext *s, int poc_lsb)
509	0	{
510	0	int max_poc_lsb = 1 << s->sps->log2_max_poc_lsb;
511	0	int prev_poc_lsb = s->pocTid0 % max_poc_lsb;
512	0	int prev_poc_msb = s->pocTid0 - prev_poc_lsb;
513	0	int poc_msb;
514
515	0	if (poc_lsb < prev_poc_lsb && prev_poc_lsb - poc_lsb >= max_poc_lsb / 2)
516	0	poc_msb = prev_poc_msb + max_poc_lsb;
517	0	else if (poc_lsb > prev_poc_lsb && poc_lsb - prev_poc_lsb > max_poc_lsb / 2)
518	0	poc_msb = prev_poc_msb - max_poc_lsb;
519	0	else
520	0	poc_msb = prev_poc_msb;
521
522		// For BLA picture types, POCmsb is set to 0.
523	0	if (s->nal_unit_type == NAL_BLA_W_LP \|\|
524	0	s->nal_unit_type == NAL_BLA_W_RADL \|\|
525	0	s->nal_unit_type == NAL_BLA_N_LP)
526	0	poc_msb = 0;
527
528	0	return poc_msb + poc_lsb;
529	0	}
530
531		int ff_hevc_frame_nb_refs(HEVCContext *s)
532	0	{
533	0	int ret = 0;
534	0	int i;
535	0	const ShortTermRPS *rps = s->sh.short_term_rps;
536	0	LongTermRPS *long_rps = &s->sh.long_term_rps;
537
538	0	if (rps) {
539	0	for (i = 0; i < rps->num_negative_pics; i++)
540	0	ret += !!rps->used[i];
541	0	for (; i < rps->num_delta_pocs; i++)
542	0	ret += !!rps->used[i];
543	0	}
544
545	0	if (long_rps) {
546	0	for (i = 0; i < long_rps->nb_refs; i++)
547	0	ret += !!long_rps->used[i];
548	0	}
549	0	return ret;
550	0	}
551		#endif