[deb_ffmpeg.git] / ffmpeg / libavcodec / hevc_refs.c

/*
 * 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);

        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;

        frame->collocated_ref = NULL;
    }
}

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];
}

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->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;
        frame->ctb_count = s->sps->ctb_width * s->sps->ctb_height;
        for (j = 0; j < frame->ctb_count; j++)
            frame->rpl_tab[j] = (RefPicListTab *)frame->rpl_buf->data;

        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 *dst = out;
            AVFrame *src = frame->frame;
            const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(src->format);
            int pixel_shift = !!(desc->comp[0].depth_minus1 > 7);

            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;

            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);
            return 1;
        }

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

    return 0;
}

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;
}
Commit	Line	Data
2ba45a60 DM	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	{
	32	/* frame->frame can be NULL if context init failed */
	33	if (!frame->frame \|\| !frame->frame->buf[0])
	34	return;
	35
	36	frame->flags &= ~flags;
	37	if (!frame->flags) {
	38	ff_thread_release_buffer(s->avctx, &frame->tf);
	39
	40	av_buffer_unref(&frame->tab_mvf_buf);
	41	frame->tab_mvf = NULL;
	42
	43	av_buffer_unref(&frame->rpl_buf);
	44	av_buffer_unref(&frame->rpl_tab_buf);
	45	frame->rpl_tab = NULL;
	46	frame->refPicList = NULL;
	47
	48	frame->collocated_ref = NULL;
	49	}
	50	}
	51
	52	RefPicList ff_hevc_get_ref_list(HEVCContext s, HEVCFrame *ref, int x0, int y0)
	53	{
	54	int x_cb = x0 >> s->sps->log2_ctb_size;
	55	int y_cb = y0 >> s->sps->log2_ctb_size;
	56	int pic_width_cb = s->sps->ctb_width;
	57	int ctb_addr_ts = s->pps->ctb_addr_rs_to_ts[y_cb * pic_width_cb + x_cb];
	58	return (RefPicList *)ref->rpl_tab[ctb_addr_ts];
	59	}
	60
	61	void ff_hevc_clear_refs(HEVCContext *s)
	62	{
	63	int i;
	64	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
65	ff_hevc_unref_frame(s, &s->DPB[i],
66	HEVC_FRAME_FLAG_SHORT_REF \|
67	HEVC_FRAME_FLAG_LONG_REF);
68	}
69
70	void ff_hevc_flush_dpb(HEVCContext *s)
71	{
72	int i;
73	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
74	ff_hevc_unref_frame(s, &s->DPB[i], ~0);
75	}
76
77	static HEVCFrame alloc_frame(HEVCContext s)
78	{
79	int i, j, ret;
80	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
81	HEVCFrame *frame = &s->DPB[i];
82	if (frame->frame->buf[0])
83	continue;
84
85	ret = ff_thread_get_buffer(s->avctx, &frame->tf,
86	AV_GET_BUFFER_FLAG_REF);
87	if (ret < 0)
88	return NULL;
89
90	frame->rpl_buf = av_buffer_allocz(s->nb_nals * sizeof(RefPicListTab));
91	if (!frame->rpl_buf)
92	goto fail;
93
94	frame->tab_mvf_buf = av_buffer_pool_get(s->tab_mvf_pool);
95	if (!frame->tab_mvf_buf)
96	goto fail;
97	frame->tab_mvf = (MvField *)frame->tab_mvf_buf->data;
98
99	frame->rpl_tab_buf = av_buffer_pool_get(s->rpl_tab_pool);
100	if (!frame->rpl_tab_buf)
101	goto fail;
102	frame->rpl_tab = (RefPicListTab **)frame->rpl_tab_buf->data;
103	frame->ctb_count = s->sps->ctb_width * s->sps->ctb_height;
104	for (j = 0; j < frame->ctb_count; j++)
105	frame->rpl_tab[j] = (RefPicListTab *)frame->rpl_buf->data;
106
107	frame->frame->top_field_first = s->picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD;
108	frame->frame->interlaced_frame = (s->picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD) \|\| (s->picture_struct == AV_PICTURE_STRUCTURE_BOTTOM_FIELD);
109	return frame;
110	fail:
111	ff_hevc_unref_frame(s, frame, ~0);
112	return NULL;
113	}
114	av_log(s->avctx, AV_LOG_ERROR, "Error allocating frame, DPB full.\n");
115	return NULL;
116	}
117
118	int ff_hevc_set_new_ref(HEVCContext s, AVFrame *frame, int poc)
119	{
120	HEVCFrame *ref;
121	int i;
122
123	/* check that this POC doesn't already exist */
124	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
125	HEVCFrame *frame = &s->DPB[i];
126
127	if (frame->frame->buf[0] && frame->sequence == s->seq_decode &&
128	frame->poc == poc) {
129	av_log(s->avctx, AV_LOG_ERROR, "Duplicate POC in a sequence: %d.\n",
130	poc);
131	return AVERROR_INVALIDDATA;
132	}
133	}
134
135	ref = alloc_frame(s);
136	if (!ref)
137	return AVERROR(ENOMEM);
138
139	*frame = ref->frame;
140	s->ref = ref;
141
142	if (s->sh.pic_output_flag)
143	ref->flags = HEVC_FRAME_FLAG_OUTPUT \| HEVC_FRAME_FLAG_SHORT_REF;
144	else
145	ref->flags = HEVC_FRAME_FLAG_SHORT_REF;
146
147	ref->poc = poc;
148	ref->sequence = s->seq_decode;
149	ref->window = s->sps->output_window;
150
151	return 0;
152	}
153
154	int ff_hevc_output_frame(HEVCContext s, AVFrame out, int flush)
155	{
156	do {
157	int nb_output = 0;
158	int min_poc = INT_MAX;
159	int i, min_idx, ret;
160
161	if (s->sh.no_output_of_prior_pics_flag == 1) {
162	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
163	HEVCFrame *frame = &s->DPB[i];
164	if (!(frame->flags & HEVC_FRAME_FLAG_BUMPING) && frame->poc != s->poc &&
165	frame->sequence == s->seq_output) {
166	ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT);
167	}
168	}
169	}
170
171	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
172	HEVCFrame *frame = &s->DPB[i];
173	if ((frame->flags & HEVC_FRAME_FLAG_OUTPUT) &&
174	frame->sequence == s->seq_output) {
175	nb_output++;
176	if (frame->poc < min_poc) {
177	min_poc = frame->poc;
178	min_idx = i;
179	}
180	}
181	}
182
183	/* wait for more frames before output */
184	if (!flush && s->seq_output == s->seq_decode && s->sps &&
185	nb_output <= s->sps->temporal_layer[s->sps->max_sub_layers - 1].num_reorder_pics)
186	return 0;
187
188	if (nb_output) {
189	HEVCFrame *frame = &s->DPB[min_idx];
190	AVFrame *dst = out;
191	AVFrame *src = frame->frame;
192	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(src->format);
193	int pixel_shift = !!(desc->comp[0].depth_minus1 > 7);
194
195	ret = av_frame_ref(out, src);
196	if (frame->flags & HEVC_FRAME_FLAG_BUMPING)
197	ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT \| HEVC_FRAME_FLAG_BUMPING);
198	else
199	ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT);
200	if (ret < 0)
201	return ret;
202
203	for (i = 0; i < 3; i++) {
204	int hshift = (i > 0) ? desc->log2_chroma_w : 0;
205	int vshift = (i > 0) ? desc->log2_chroma_h : 0;
206	int off = ((frame->window.left_offset >> hshift) << pixel_shift) +
207	(frame->window.top_offset >> vshift) * dst->linesize[i];
208	dst->data[i] += off;
209	}
210	av_log(s->avctx, AV_LOG_DEBUG,
211	"Output frame with POC %d.\n", frame->poc);
212	return 1;
213	}
214
215	if (s->seq_output != s->seq_decode)
216	s->seq_output = (s->seq_output + 1) & 0xff;
217	else
218	break;
219	} while (1);
220
221	return 0;
222	}
223
224	void ff_hevc_bump_frame(HEVCContext *s)
225	{
226	int dpb = 0;
227	int min_poc = INT_MAX;
228	int i;
229
230	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
231	HEVCFrame *frame = &s->DPB[i];
232	if ((frame->flags) &&
233	frame->sequence == s->seq_output &&
234	frame->poc != s->poc) {
235	dpb++;
236	}
237	}
238
239	if (s->sps && dpb >= s->sps->temporal_layer[s->sps->max_sub_layers - 1].max_dec_pic_buffering) {
240	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
241	HEVCFrame *frame = &s->DPB[i];
242	if ((frame->flags) &&
243	frame->sequence == s->seq_output &&
244	frame->poc != s->poc) {
245	if (frame->flags == HEVC_FRAME_FLAG_OUTPUT && frame->poc < min_poc) {
246	min_poc = frame->poc;
247	}
248	}
249	}
250
251	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
252	HEVCFrame *frame = &s->DPB[i];
253	if (frame->flags & HEVC_FRAME_FLAG_OUTPUT &&
254	frame->sequence == s->seq_output &&
255	frame->poc <= min_poc) {
256	frame->flags \|= HEVC_FRAME_FLAG_BUMPING;
257	}
258	}
259
260	dpb--;
261	}
262	}
263
264	static int init_slice_rpl(HEVCContext *s)
265	{
266	HEVCFrame *frame = s->ref;
267	int ctb_count = frame->ctb_count;
268	int ctb_addr_ts = s->pps->ctb_addr_rs_to_ts[s->sh.slice_segment_addr];
269	int i;
270
271	if (s->slice_idx >= frame->rpl_buf->size / sizeof(RefPicListTab))
272	return AVERROR_INVALIDDATA;
273
274	for (i = ctb_addr_ts; i < ctb_count; i++)
275	frame->rpl_tab[i] = (RefPicListTab *)frame->rpl_buf->data + s->slice_idx;
276
277	frame->refPicList = (RefPicList *)frame->rpl_tab[ctb_addr_ts];
278
279	return 0;
280	}
281
282	int ff_hevc_slice_rpl(HEVCContext *s)
283	{
284	SliceHeader *sh = &s->sh;
285
286	uint8_t nb_list = sh->slice_type == B_SLICE ? 2 : 1;
287	uint8_t list_idx;
288	int i, j, ret;
289
290	ret = init_slice_rpl(s);
291	if (ret < 0)
292	return ret;
293
294	if (!(s->rps[ST_CURR_BEF].nb_refs + s->rps[ST_CURR_AFT].nb_refs +
295	s->rps[LT_CURR].nb_refs)) {
296	av_log(s->avctx, AV_LOG_ERROR, "Zero refs in the frame RPS.\n");
297	return AVERROR_INVALIDDATA;
298	}
299
300	for (list_idx = 0; list_idx < nb_list; list_idx++) {
301	RefPicList rpl_tmp = { { 0 } };
302	RefPicList *rpl = &s->ref->refPicList[list_idx];
303
304	/* The order of the elements is
305	* ST_CURR_BEF - ST_CURR_AFT - LT_CURR for the L0 and
306	* ST_CURR_AFT - ST_CURR_BEF - LT_CURR for the L1 */
307	int cand_lists[3] = { list_idx ? ST_CURR_AFT : ST_CURR_BEF,
308	list_idx ? ST_CURR_BEF : ST_CURR_AFT,
309	LT_CURR };
310
311	/* concatenate the candidate lists for the current frame */
312	while (rpl_tmp.nb_refs < sh->nb_refs[list_idx]) {
313	for (i = 0; i < FF_ARRAY_ELEMS(cand_lists); i++) {
314	RefPicList *rps = &s->rps[cand_lists[i]];
315	for (j = 0; j < rps->nb_refs && rpl_tmp.nb_refs < MAX_REFS; j++) {
316	rpl_tmp.list[rpl_tmp.nb_refs] = rps->list[j];
317	rpl_tmp.ref[rpl_tmp.nb_refs] = rps->ref[j];
318	rpl_tmp.isLongTerm[rpl_tmp.nb_refs] = i == 2;
319	rpl_tmp.nb_refs++;
320	}
321	}
322	}
323
324	/* reorder the references if necessary */
325	if (sh->rpl_modification_flag[list_idx]) {
326	for (i = 0; i < sh->nb_refs[list_idx]; i++) {
327	int idx = sh->list_entry_lx[list_idx][i];
328
329	if (idx >= rpl_tmp.nb_refs) {
330	av_log(s->avctx, AV_LOG_ERROR, "Invalid reference index.\n");
331	return AVERROR_INVALIDDATA;
332	}
333
334	rpl->list[i] = rpl_tmp.list[idx];
335	rpl->ref[i] = rpl_tmp.ref[idx];
336	rpl->isLongTerm[i] = rpl_tmp.isLongTerm[idx];
337	rpl->nb_refs++;
338	}
339	} else {
340	memcpy(rpl, &rpl_tmp, sizeof(*rpl));
341	rpl->nb_refs = FFMIN(rpl->nb_refs, sh->nb_refs[list_idx]);
342	}
343
344	if (sh->collocated_list == list_idx &&
345	sh->collocated_ref_idx < rpl->nb_refs)
346	s->ref->collocated_ref = rpl->ref[sh->collocated_ref_idx];
347	}
348
349	return 0;
350	}
351
352	static HEVCFrame find_ref_idx(HEVCContext s, int poc)
353	{
354	int i;
355	int LtMask = (1 << s->sps->log2_max_poc_lsb) - 1;
356
357	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
358	HEVCFrame *ref = &s->DPB[i];
359	if (ref->frame->buf[0] && (ref->sequence == s->seq_decode)) {
360	if ((ref->poc & LtMask) == poc)
361	return ref;
362	}
363	}
364
365	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
366	HEVCFrame *ref = &s->DPB[i];
367	if (ref->frame->buf[0] && ref->sequence == s->seq_decode) {
368	if (ref->poc == poc \|\| (ref->poc & LtMask) == poc)
369	return ref;
370	}
371	}
372
373	av_log(s->avctx, AV_LOG_ERROR,
374	"Could not find ref with POC %d\n", poc);
375	return NULL;
376	}
377
378	static void mark_ref(HEVCFrame *frame, int flag)
379	{
380	frame->flags &= ~(HEVC_FRAME_FLAG_LONG_REF \| HEVC_FRAME_FLAG_SHORT_REF);
381	frame->flags \|= flag;
382	}
383
384	static HEVCFrame generate_missing_ref(HEVCContext s, int poc)
385	{
386	HEVCFrame *frame;
387	int i, x, y;
388
389	frame = alloc_frame(s);
390	if (!frame)
391	return NULL;
392
393	if (!s->sps->pixel_shift) {
394	for (i = 0; frame->frame->buf[i]; i++)
395	memset(frame->frame->buf[i]->data, 1 << (s->sps->bit_depth - 1),
396	frame->frame->buf[i]->size);
397	} else {
398	for (i = 0; frame->frame->data[i]; i++)
399	for (y = 0; y < (s->sps->height >> s->sps->vshift[i]); y++)
400	for (x = 0; x < (s->sps->width >> s->sps->hshift[i]); x++) {
401	AV_WN16(frame->frame->data[i] + y * frame->frame->linesize[i] + 2 * x,
402	1 << (s->sps->bit_depth - 1));
403	}
404	}
405
406	frame->poc = poc;
407	frame->sequence = s->seq_decode;
408	frame->flags = 0;
409
410	if (s->threads_type == FF_THREAD_FRAME)
411	ff_thread_report_progress(&frame->tf, INT_MAX, 0);
412
413	return frame;
414	}
415
416	/* add a reference with the given poc to the list and mark it as used in DPB */
417	static int add_candidate_ref(HEVCContext s, RefPicList list,
418	int poc, int ref_flag)
419	{
420	HEVCFrame *ref = find_ref_idx(s, poc);
421
422	if (ref == s->ref)
423	return AVERROR_INVALIDDATA;
424
425	if (!ref) {
426	ref = generate_missing_ref(s, poc);
427	if (!ref)
428	return AVERROR(ENOMEM);
429	}
430
431	list->list[list->nb_refs] = ref->poc;
432	list->ref[list->nb_refs] = ref;
433	list->nb_refs++;
434
435	mark_ref(ref, ref_flag);
436	return 0;
437	}
438
439	int ff_hevc_frame_rps(HEVCContext *s)
440	{
441	const ShortTermRPS *short_rps = s->sh.short_term_rps;
442	const LongTermRPS *long_rps = &s->sh.long_term_rps;
443	RefPicList *rps = s->rps;
444	int i, ret;
445
446	if (!short_rps) {
447	rps[0].nb_refs = rps[1].nb_refs = 0;
448	return 0;
449	}
450
451	/* clear the reference flags on all frames except the current one */
452	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
453	HEVCFrame *frame = &s->DPB[i];
454
455	if (frame == s->ref)
456	continue;
457
458	mark_ref(frame, 0);
459	}
460
461	for (i = 0; i < NB_RPS_TYPE; i++)
462	rps[i].nb_refs = 0;
463
464	/* add the short refs */
465	for (i = 0; i < short_rps->num_delta_pocs; i++) {
466	int poc = s->poc + short_rps->delta_poc[i];
467	int list;
468
469	if (!short_rps->used[i])
470	list = ST_FOLL;
471	else if (i < short_rps->num_negative_pics)
472	list = ST_CURR_BEF;
473	else
474	list = ST_CURR_AFT;
475
476	ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_SHORT_REF);
477	if (ret < 0)
478	return ret;
479	}
480
481	/* add the long refs */
482	for (i = 0; i < long_rps->nb_refs; i++) {
483	int poc = long_rps->poc[i];
484	int list = long_rps->used[i] ? LT_CURR : LT_FOLL;
485
486	ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_LONG_REF);
487	if (ret < 0)
488	return ret;
489	}
490
491	/* release any frames that are now unused */
492	for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
493	ff_hevc_unref_frame(s, &s->DPB[i], 0);
494
495	return 0;
496	}
497
498	int ff_hevc_compute_poc(HEVCContext *s, int poc_lsb)
499	{
500	int max_poc_lsb = 1 << s->sps->log2_max_poc_lsb;
501	int prev_poc_lsb = s->pocTid0 % max_poc_lsb;
502	int prev_poc_msb = s->pocTid0 - prev_poc_lsb;
503	int poc_msb;
504
505	if (poc_lsb < prev_poc_lsb && prev_poc_lsb - poc_lsb >= max_poc_lsb / 2)
506	poc_msb = prev_poc_msb + max_poc_lsb;
507	else if (poc_lsb > prev_poc_lsb && poc_lsb - prev_poc_lsb > max_poc_lsb / 2)
508	poc_msb = prev_poc_msb - max_poc_lsb;
509	else
510	poc_msb = prev_poc_msb;
511
512	// For BLA picture types, POCmsb is set to 0.
513	if (s->nal_unit_type == NAL_BLA_W_LP \|\|
514	s->nal_unit_type == NAL_BLA_W_RADL \|\|
515	s->nal_unit_type == NAL_BLA_N_LP)
516	poc_msb = 0;
517
518	return poc_msb + poc_lsb;
519	}
520
521	int ff_hevc_frame_nb_refs(HEVCContext *s)
522	{
523	int ret = 0;
524	int i;
525	const ShortTermRPS *rps = s->sh.short_term_rps;
526	LongTermRPS *long_rps = &s->sh.long_term_rps;
527
528	if (rps) {
529	for (i = 0; i < rps->num_negative_pics; i++)
530	ret += !!rps->used[i];
531	for (; i < rps->num_delta_pocs; i++)
532	ret += !!rps->used[i];
533	}
534
535	if (long_rps) {
536	for (i = 0; i < long_rps->nb_refs; i++)
537	ret += !!long_rps->used[i];
538	}
539	return ret;
540	}