mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-30 03:12:08 +00:00
b53800691c
pkt_dts needs to be set manually when using the receive_frame() callback, so
it was unset after 2fdecbb239.
Fixes PTS guessing for certain files with broken timestamps. Cf.
https://github.com/mpv-player/mpv/issues/14806
Reported-by: llyyr <llyyr.public@gmail.com>
494 lines
15 KiB
C
494 lines
15 KiB
C
/*
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* HEVC video decoder
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*
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* Copyright (C) 2012 - 2013 Guillaume Martres
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* Copyright (C) 2012 - 2013 Gildas Cocherel
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/mem.h"
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#include "container_fifo.h"
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#include "decode.h"
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#include "hevc.h"
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#include "hevcdec.h"
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#include "progressframe.h"
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#include "refstruct.h"
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void ff_hevc_unref_frame(HEVCFrame *frame, int flags)
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{
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frame->flags &= ~flags;
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if (!frame->flags) {
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ff_progress_frame_unref(&frame->tf);
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av_frame_unref(frame->frame_grain);
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frame->needs_fg = 0;
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ff_refstruct_unref(&frame->pps);
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ff_refstruct_unref(&frame->tab_mvf);
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ff_refstruct_unref(&frame->rpl);
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frame->nb_rpl_elems = 0;
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ff_refstruct_unref(&frame->rpl_tab);
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frame->refPicList = NULL;
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ff_refstruct_unref(&frame->hwaccel_picture_private);
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}
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}
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const RefPicList *ff_hevc_get_ref_list(const HEVCFrame *ref, int x0, int y0)
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{
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const HEVCSPS *sps = ref->pps->sps;
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int x_cb = x0 >> sps->log2_ctb_size;
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int y_cb = y0 >> sps->log2_ctb_size;
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int pic_width_cb = sps->ctb_width;
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int ctb_addr_ts = ref->pps->ctb_addr_rs_to_ts[y_cb * pic_width_cb + x_cb];
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return &ref->rpl_tab[ctb_addr_ts]->refPicList[0];
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}
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void ff_hevc_clear_refs(HEVCLayerContext *l)
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{
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int i;
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for (i = 0; i < FF_ARRAY_ELEMS(l->DPB); i++)
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ff_hevc_unref_frame(&l->DPB[i],
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HEVC_FRAME_FLAG_SHORT_REF |
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HEVC_FRAME_FLAG_LONG_REF);
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}
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void ff_hevc_flush_dpb(HEVCContext *s)
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{
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for (int layer = 0; layer < FF_ARRAY_ELEMS(s->layers); layer++) {
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HEVCLayerContext *l = &s->layers[layer];
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for (int i = 0; i < FF_ARRAY_ELEMS(l->DPB); i++)
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ff_hevc_unref_frame(&l->DPB[i], ~0);
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}
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}
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static HEVCFrame *alloc_frame(HEVCContext *s, HEVCLayerContext *l)
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{
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int i, j, ret;
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for (i = 0; i < FF_ARRAY_ELEMS(l->DPB); i++) {
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HEVCFrame *frame = &l->DPB[i];
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if (frame->f)
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continue;
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ret = ff_progress_frame_get_buffer(s->avctx, &frame->tf,
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AV_GET_BUFFER_FLAG_REF);
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if (ret < 0)
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return NULL;
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frame->rpl = ff_refstruct_allocz(s->pkt.nb_nals * sizeof(*frame->rpl));
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if (!frame->rpl)
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goto fail;
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frame->nb_rpl_elems = s->pkt.nb_nals;
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frame->tab_mvf = ff_refstruct_pool_get(l->tab_mvf_pool);
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if (!frame->tab_mvf)
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goto fail;
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frame->rpl_tab = ff_refstruct_pool_get(l->rpl_tab_pool);
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if (!frame->rpl_tab)
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goto fail;
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frame->ctb_count = l->sps->ctb_width * l->sps->ctb_height;
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for (j = 0; j < frame->ctb_count; j++)
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frame->rpl_tab[j] = frame->rpl;
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if (s->sei.picture_timing.picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD)
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frame->f->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
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if ((s->sei.picture_timing.picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD) ||
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(s->sei.picture_timing.picture_struct == AV_PICTURE_STRUCTURE_BOTTOM_FIELD))
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frame->f->flags |= AV_FRAME_FLAG_INTERLACED;
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ret = ff_hwaccel_frame_priv_alloc(s->avctx, &frame->hwaccel_picture_private);
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if (ret < 0)
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goto fail;
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frame->pps = ff_refstruct_ref_c(s->pps);
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return frame;
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fail:
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ff_hevc_unref_frame(frame, ~0);
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return NULL;
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}
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av_log(s->avctx, AV_LOG_ERROR, "Error allocating frame, DPB full.\n");
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return NULL;
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}
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int ff_hevc_set_new_ref(HEVCContext *s, HEVCLayerContext *l, int poc)
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{
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HEVCFrame *ref;
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int i;
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/* check that this POC doesn't already exist */
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for (i = 0; i < FF_ARRAY_ELEMS(l->DPB); i++) {
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HEVCFrame *frame = &l->DPB[i];
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if (frame->f && frame->poc == poc) {
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av_log(s->avctx, AV_LOG_ERROR, "Duplicate POC in a sequence: %d.\n",
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poc);
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return AVERROR_INVALIDDATA;
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}
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}
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ref = alloc_frame(s, l);
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if (!ref)
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return AVERROR(ENOMEM);
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s->cur_frame = ref;
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s->collocated_ref = NULL;
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if (s->sh.pic_output_flag)
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ref->flags = HEVC_FRAME_FLAG_OUTPUT | HEVC_FRAME_FLAG_SHORT_REF;
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else
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ref->flags = HEVC_FRAME_FLAG_SHORT_REF;
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ref->poc = poc;
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ref->f->crop_left = l->sps->output_window.left_offset;
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ref->f->crop_right = l->sps->output_window.right_offset;
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ref->f->crop_top = l->sps->output_window.top_offset;
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ref->f->crop_bottom = l->sps->output_window.bottom_offset;
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return 0;
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}
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static void unref_missing_refs(HEVCLayerContext *l)
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{
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for (int i = 0; i < FF_ARRAY_ELEMS(l->DPB); i++) {
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HEVCFrame *frame = &l->DPB[i];
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if (frame->flags & HEVC_FRAME_FLAG_UNAVAILABLE) {
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ff_hevc_unref_frame(frame, ~0);
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}
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}
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}
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int ff_hevc_output_frames(HEVCContext *s, HEVCLayerContext *l,
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unsigned max_output, unsigned max_dpb, int discard)
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{
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while (1) {
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int nb_dpb = 0;
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int nb_output = 0;
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int min_poc = INT_MAX;
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int i, min_idx, ret = 0;
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for (i = 0; i < FF_ARRAY_ELEMS(l->DPB); i++) {
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HEVCFrame *frame = &l->DPB[i];
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if (frame->flags & HEVC_FRAME_FLAG_OUTPUT) {
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nb_output++;
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if (frame->poc < min_poc || nb_output == 1) {
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min_poc = frame->poc;
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min_idx = i;
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}
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}
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nb_dpb += !!frame->flags;
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}
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if (nb_output > max_output ||
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(nb_output && nb_dpb > max_dpb)) {
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HEVCFrame *frame = &l->DPB[min_idx];
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AVFrame *f = frame->needs_fg ? frame->frame_grain : frame->f;
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if (!discard) {
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f->pkt_dts = s->pkt_dts;
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ret = ff_container_fifo_write(s->output_fifo, f);
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}
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ff_hevc_unref_frame(frame, HEVC_FRAME_FLAG_OUTPUT);
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if (ret < 0)
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return ret;
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av_log(s->avctx, AV_LOG_DEBUG, "%s frame with POC %d.\n",
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discard ? "Discarded" : "Output", frame->poc);
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continue;
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}
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return 0;
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}
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}
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static int init_slice_rpl(HEVCContext *s)
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{
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HEVCFrame *frame = s->cur_frame;
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int ctb_count = frame->ctb_count;
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int ctb_addr_ts = s->pps->ctb_addr_rs_to_ts[s->sh.slice_segment_addr];
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int i;
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if (s->slice_idx >= frame->nb_rpl_elems)
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return AVERROR_INVALIDDATA;
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for (i = ctb_addr_ts; i < ctb_count; i++)
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frame->rpl_tab[i] = frame->rpl + s->slice_idx;
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frame->refPicList = (RefPicList *)frame->rpl_tab[ctb_addr_ts];
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return 0;
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}
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int ff_hevc_slice_rpl(HEVCContext *s)
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{
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SliceHeader *sh = &s->sh;
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uint8_t nb_list = sh->slice_type == HEVC_SLICE_B ? 2 : 1;
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uint8_t list_idx;
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int i, j, ret;
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ret = init_slice_rpl(s);
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if (ret < 0)
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return ret;
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if (!(s->rps[ST_CURR_BEF].nb_refs + s->rps[ST_CURR_AFT].nb_refs +
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s->rps[LT_CURR].nb_refs) && !s->pps->pps_curr_pic_ref_enabled_flag) {
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av_log(s->avctx, AV_LOG_ERROR, "Zero refs in the frame RPS.\n");
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return AVERROR_INVALIDDATA;
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}
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for (list_idx = 0; list_idx < nb_list; list_idx++) {
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RefPicList rpl_tmp = { { 0 } };
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RefPicList *rpl = &s->cur_frame->refPicList[list_idx];
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/* The order of the elements is
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* ST_CURR_BEF - ST_CURR_AFT - LT_CURR for the L0 and
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* ST_CURR_AFT - ST_CURR_BEF - LT_CURR for the L1 */
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int cand_lists[3] = { list_idx ? ST_CURR_AFT : ST_CURR_BEF,
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list_idx ? ST_CURR_BEF : ST_CURR_AFT,
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LT_CURR };
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/* concatenate the candidate lists for the current frame */
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while (rpl_tmp.nb_refs < sh->nb_refs[list_idx]) {
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for (i = 0; i < FF_ARRAY_ELEMS(cand_lists); i++) {
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RefPicList *rps = &s->rps[cand_lists[i]];
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for (j = 0; j < rps->nb_refs && rpl_tmp.nb_refs < HEVC_MAX_REFS; j++) {
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rpl_tmp.list[rpl_tmp.nb_refs] = rps->list[j];
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rpl_tmp.ref[rpl_tmp.nb_refs] = rps->ref[j];
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rpl_tmp.isLongTerm[rpl_tmp.nb_refs] = i == 2;
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rpl_tmp.nb_refs++;
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}
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}
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// Construct RefPicList0, RefPicList1 (8-8, 8-10)
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if (s->pps->pps_curr_pic_ref_enabled_flag && rpl_tmp.nb_refs < HEVC_MAX_REFS) {
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rpl_tmp.list[rpl_tmp.nb_refs] = s->cur_frame->poc;
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rpl_tmp.ref[rpl_tmp.nb_refs] = s->cur_frame;
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rpl_tmp.isLongTerm[rpl_tmp.nb_refs] = 1;
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rpl_tmp.nb_refs++;
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}
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}
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/* reorder the references if necessary */
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if (sh->rpl_modification_flag[list_idx]) {
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for (i = 0; i < sh->nb_refs[list_idx]; i++) {
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int idx = sh->list_entry_lx[list_idx][i];
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if (idx >= rpl_tmp.nb_refs) {
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av_log(s->avctx, AV_LOG_ERROR, "Invalid reference index.\n");
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return AVERROR_INVALIDDATA;
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}
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rpl->list[i] = rpl_tmp.list[idx];
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rpl->ref[i] = rpl_tmp.ref[idx];
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rpl->isLongTerm[i] = rpl_tmp.isLongTerm[idx];
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rpl->nb_refs++;
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}
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} else {
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memcpy(rpl, &rpl_tmp, sizeof(*rpl));
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rpl->nb_refs = FFMIN(rpl->nb_refs, sh->nb_refs[list_idx]);
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}
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// 8-9
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if (s->pps->pps_curr_pic_ref_enabled_flag &&
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!sh->rpl_modification_flag[list_idx] &&
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rpl_tmp.nb_refs > sh->nb_refs[L0]) {
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rpl->list[sh->nb_refs[L0] - 1] = s->cur_frame->poc;
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rpl->ref[sh->nb_refs[L0] - 1] = s->cur_frame;
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}
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if (sh->collocated_list == list_idx &&
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sh->collocated_ref_idx < rpl->nb_refs)
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s->collocated_ref = rpl->ref[sh->collocated_ref_idx];
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}
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return 0;
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}
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static HEVCFrame *find_ref_idx(HEVCContext *s, HEVCLayerContext *l,
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int poc, uint8_t use_msb)
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{
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int mask = use_msb ? ~0 : (1 << l->sps->log2_max_poc_lsb) - 1;
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int i;
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for (i = 0; i < FF_ARRAY_ELEMS(l->DPB); i++) {
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HEVCFrame *ref = &l->DPB[i];
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if (ref->f) {
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if ((ref->poc & mask) == poc && (use_msb || ref->poc != s->poc))
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return ref;
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}
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}
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if (s->nal_unit_type != HEVC_NAL_CRA_NUT && !IS_BLA(s))
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av_log(s->avctx, AV_LOG_ERROR,
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"Could not find ref with POC %d\n", poc);
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return NULL;
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}
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static void mark_ref(HEVCFrame *frame, int flag)
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{
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frame->flags &= ~(HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF);
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frame->flags |= flag;
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}
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static HEVCFrame *generate_missing_ref(HEVCContext *s, HEVCLayerContext *l, int poc)
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{
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HEVCFrame *frame;
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int i, y;
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frame = alloc_frame(s, l);
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if (!frame)
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return NULL;
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if (!s->avctx->hwaccel) {
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if (!l->sps->pixel_shift) {
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for (i = 0; frame->f->data[i]; i++)
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memset(frame->f->data[i], 1 << (l->sps->bit_depth - 1),
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frame->f->linesize[i] * AV_CEIL_RSHIFT(l->sps->height, l->sps->vshift[i]));
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} else {
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for (i = 0; frame->f->data[i]; i++)
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for (y = 0; y < (l->sps->height >> l->sps->vshift[i]); y++) {
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uint8_t *dst = frame->f->data[i] + y * frame->f->linesize[i];
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AV_WN16(dst, 1 << (l->sps->bit_depth - 1));
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av_memcpy_backptr(dst + 2, 2, 2*(l->sps->width >> l->sps->hshift[i]) - 2);
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}
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}
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}
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frame->poc = poc;
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frame->flags = HEVC_FRAME_FLAG_UNAVAILABLE;
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if (s->avctx->active_thread_type == FF_THREAD_FRAME)
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ff_progress_frame_report(&frame->tf, INT_MAX);
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return frame;
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}
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/* add a reference with the given poc to the list and mark it as used in DPB */
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static int add_candidate_ref(HEVCContext *s, HEVCLayerContext *l,
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RefPicList *list,
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int poc, int ref_flag, uint8_t use_msb)
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{
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HEVCFrame *ref = find_ref_idx(s, l, poc, use_msb);
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if (ref == s->cur_frame || list->nb_refs >= HEVC_MAX_REFS)
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return AVERROR_INVALIDDATA;
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if (!ref) {
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ref = generate_missing_ref(s, l, poc);
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if (!ref)
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return AVERROR(ENOMEM);
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}
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list->list[list->nb_refs] = ref->poc;
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list->ref[list->nb_refs] = ref;
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list->nb_refs++;
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mark_ref(ref, ref_flag);
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return 0;
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}
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int ff_hevc_frame_rps(HEVCContext *s, HEVCLayerContext *l)
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{
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const ShortTermRPS *short_rps = s->sh.short_term_rps;
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const LongTermRPS *long_rps = &s->sh.long_term_rps;
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RefPicList *rps = s->rps;
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int i, ret = 0;
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if (!short_rps) {
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rps[0].nb_refs = rps[1].nb_refs = 0;
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return 0;
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}
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unref_missing_refs(l);
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/* clear the reference flags on all frames except the current one */
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for (i = 0; i < FF_ARRAY_ELEMS(l->DPB); i++) {
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HEVCFrame *frame = &l->DPB[i];
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if (frame == s->cur_frame)
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continue;
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mark_ref(frame, 0);
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}
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for (i = 0; i < NB_RPS_TYPE; i++)
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rps[i].nb_refs = 0;
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/* add the short refs */
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for (i = 0; i < short_rps->num_delta_pocs; i++) {
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int poc = s->poc + short_rps->delta_poc[i];
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int list;
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if (!(short_rps->used & (1 << i)))
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list = ST_FOLL;
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else if (i < short_rps->num_negative_pics)
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list = ST_CURR_BEF;
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else
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list = ST_CURR_AFT;
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ret = add_candidate_ref(s, l, &rps[list], poc,
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HEVC_FRAME_FLAG_SHORT_REF, 1);
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if (ret < 0)
|
|
goto fail;
|
|
}
|
|
|
|
/* 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, l, &rps[list], poc,
|
|
HEVC_FRAME_FLAG_LONG_REF, long_rps->poc_msb_present[i]);
|
|
if (ret < 0)
|
|
goto fail;
|
|
}
|
|
|
|
fail:
|
|
/* release any frames that are now unused */
|
|
for (i = 0; i < FF_ARRAY_ELEMS(l->DPB); i++)
|
|
ff_hevc_unref_frame(&l->DPB[i], 0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ff_hevc_frame_nb_refs(const SliceHeader *sh, const HEVCPPS *pps)
|
|
{
|
|
int ret = 0;
|
|
int i;
|
|
const ShortTermRPS *rps = sh->short_term_rps;
|
|
const LongTermRPS *long_rps = &sh->long_term_rps;
|
|
|
|
if (rps) {
|
|
for (i = 0; i < rps->num_negative_pics; i++)
|
|
ret += !!(rps->used & (1 << i));
|
|
for (; i < rps->num_delta_pocs; i++)
|
|
ret += !!(rps->used & (1 << i));
|
|
}
|
|
|
|
if (long_rps) {
|
|
for (i = 0; i < long_rps->nb_refs; i++)
|
|
ret += !!long_rps->used[i];
|
|
}
|
|
|
|
if (pps->pps_curr_pic_ref_enabled_flag)
|
|
ret++;
|
|
|
|
return ret;
|
|
}
|