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FFmpeg/libavcodec/vvc/dec.c
Frank Plowman bb9e4ff355 lavc/vvc: Skip enhancement layer NAL units 
The native VVC decoder does not yet support quality/spatial/multiview
scalability.  Bitstreams requiring this feature could cause crashes.
Patch fixes this by skipping NAL units which are not in the base layer,
warning the user while doing so.

Signed-off-by: Frank Plowman <post@frankplowman.com>
Signed-off-by: James Almer <jamrial@gmail.com>
2024-04-18 17:38:15 -03:00

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/*
* VVC video decoder
*
* Copyright (C) 2021 Nuo Mi
* Copyright (C) 2022 Xu Mu
*
* 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 "libavcodec/codec_internal.h"
#include "libavcodec/decode.h"
#include "libavcodec/profiles.h"
#include "libavcodec/refstruct.h"
#include "libavutil/cpu.h"
#include "libavutil/mem.h"
#include "libavutil/thread.h"
#include "dec.h"
#include "ctu.h"
#include "data.h"
#include "refs.h"
#include "thread.h"
#define TAB_MAX 32
typedef struct Tab {
void **tab;
size_t size;
} Tab;
typedef struct TabList {
Tab tabs[TAB_MAX];
int nb_tabs;
int zero;
int realloc;
} TabList;
#define TL_ADD(t, s) do { \
av_assert0(l->nb_tabs < TAB_MAX); \
l->tabs[l->nb_tabs].tab = (void**)&fc->tab.t; \
l->tabs[l->nb_tabs].size = sizeof(*fc->tab.t) * (s); \
l->nb_tabs++; \
} while (0)
static void tl_init(TabList *l, const int zero, const int realloc)
{
l->nb_tabs = 0;
l->zero = zero;
l->realloc = realloc;
}
static int tl_free(TabList *l)
{
for (int i = 0; i < l->nb_tabs; i++)
av_freep(l->tabs[i].tab);
return 0;
}
static int tl_create(TabList *l)
{
if (l->realloc) {
tl_free(l);
for (int i = 0; i < l->nb_tabs; i++) {
Tab *t = l->tabs + i;
*t->tab = l->zero ? av_mallocz(t->size) : av_malloc(t->size);
if (!*t->tab)
return AVERROR(ENOMEM);
}
} else if (l->zero) {
for (int i = 0; i < l->nb_tabs; i++) {
Tab *t = l->tabs + i;
memset(*t->tab, 0, t->size);
}
}
return 0;
}
static void ctu_tl_init(TabList *l, VVCFrameContext *fc)
{
const VVCPPS *pps = fc->ps.pps;
const int ctu_count = pps ? pps->ctb_count : 0;
const int changed = fc->tab.sz.ctu_count != ctu_count;
tl_init(l, 1, changed);
TL_ADD(deblock, ctu_count);
TL_ADD(sao, ctu_count);
TL_ADD(alf, ctu_count);
TL_ADD(ctus, ctu_count);
}
static void ctu_nz_tl_init(TabList *l, VVCFrameContext *fc)
{
const VVCSPS *sps = fc->ps.sps;
const VVCPPS *pps = fc->ps.pps;
const int ctu_size = sps ? (1 << sps->ctb_log2_size_y << sps->ctb_log2_size_y) : 0;
const int ctu_count = pps ? pps->ctb_count : 0;
const int changed = fc->tab.sz.ctu_count != ctu_count || fc->tab.sz.ctu_size != ctu_size;
tl_init(l, 0, changed);
TL_ADD(slice_idx, ctu_count);
TL_ADD(coeffs, ctu_count * ctu_size * VVC_MAX_SAMPLE_ARRAYS);
}
static void min_cb_tl_init(TabList *l, VVCFrameContext *fc)
{
const VVCPPS *pps = fc->ps.pps;
const int pic_size_in_min_cb = pps ? pps->min_cb_width * pps->min_cb_height : 0;
const int changed = fc->tab.sz.pic_size_in_min_cb != pic_size_in_min_cb;
tl_init(l, 1, changed);
TL_ADD(skip, pic_size_in_min_cb);
TL_ADD(imf, pic_size_in_min_cb);
TL_ADD(imtf, pic_size_in_min_cb);
TL_ADD(imm, pic_size_in_min_cb);
TL_ADD(ipm, pic_size_in_min_cb);
for (int i = LUMA; i <= CHROMA; i++) {
TL_ADD(cb_pos_x[i], pic_size_in_min_cb);
TL_ADD(cb_pos_y[i], pic_size_in_min_cb);
TL_ADD(cb_width[i], pic_size_in_min_cb);
TL_ADD(cb_height[i], pic_size_in_min_cb);
TL_ADD(cqt_depth[i], pic_size_in_min_cb);
TL_ADD(cpm[i], pic_size_in_min_cb);
TL_ADD(cp_mv[i], pic_size_in_min_cb * MAX_CONTROL_POINTS);
};
}
static void min_pu_tl_init(TabList *l, VVCFrameContext *fc)
{
const VVCPPS *pps = fc->ps.pps;
const int pic_size_in_min_pu = pps ? pps->min_pu_width * pps->min_pu_height : 0;
const int changed = fc->tab.sz.pic_size_in_min_pu != pic_size_in_min_pu;
tl_init(l, 1, changed);
TL_ADD(msf, pic_size_in_min_pu);
TL_ADD(iaf, pic_size_in_min_pu);
TL_ADD(mmi, pic_size_in_min_pu);
TL_ADD(mvf, pic_size_in_min_pu);
}
static void min_tu_tl_init(TabList *l, VVCFrameContext *fc)
{
const VVCPPS *pps = fc->ps.pps;
const int pic_size_in_min_tu = pps ? pps->min_tu_width * pps->min_tu_height : 0;
const int changed = fc->tab.sz.pic_size_in_min_tu != pic_size_in_min_tu;
tl_init(l, 1, changed);
TL_ADD(tu_joint_cbcr_residual_flag, pic_size_in_min_tu);
for (int i = LUMA; i <= CHROMA; i++) {
TL_ADD(tb_pos_x0[i], pic_size_in_min_tu);
TL_ADD(tb_pos_y0[i], pic_size_in_min_tu);
TL_ADD(tb_width[i], pic_size_in_min_tu);
TL_ADD(tb_height[i], pic_size_in_min_tu);
TL_ADD(pcmf[i], pic_size_in_min_tu);
}
for (int i = 0; i < VVC_MAX_SAMPLE_ARRAYS; i++) {
TL_ADD(tu_coded_flag[i], pic_size_in_min_tu);
TL_ADD(qp[i], pic_size_in_min_tu);
}
}
static void bs_tl_init(TabList *l, VVCFrameContext *fc)
{
const VVCPPS *pps = fc->ps.pps;
const int bs_width = pps ? (pps->width >> 2) + 1 : 0;
const int bs_height = pps ? (pps->height >> 2) + 1 : 0;
const int bs_count = bs_width * bs_height;
const int changed = fc->tab.sz.bs_width != bs_width ||
fc->tab.sz.bs_height != bs_height;
tl_init(l, 1, changed);
for (int i = 0; i < VVC_MAX_SAMPLE_ARRAYS; i++) {
TL_ADD(horizontal_bs[i], bs_count);
TL_ADD(vertical_bs[i], bs_count);
}
TL_ADD(horizontal_q, bs_count);
TL_ADD(horizontal_p, bs_count);
TL_ADD(vertical_p, bs_count);
TL_ADD(vertical_q, bs_count);
}
static void pixel_buffer_nz_tl_init(TabList *l, VVCFrameContext *fc)
{
const VVCSPS *sps = fc->ps.sps;
const VVCPPS *pps = fc->ps.pps;
const int width = pps ? pps->width : 0;
const int height = pps ? pps->height : 0;
const int ctu_width = pps ? pps->ctb_width : 0;
const int ctu_height = pps ? pps->ctb_height : 0;
const int chroma_idc = sps ? sps->r->sps_chroma_format_idc : 0;
const int ps = sps ? sps->pixel_shift : 0;
const int c_end = chroma_idc ? VVC_MAX_SAMPLE_ARRAYS : 1;
const int changed = fc->tab.sz.chroma_format_idc != chroma_idc ||
fc->tab.sz.width != width || fc->tab.sz.height != height ||
fc->tab.sz.ctu_width != ctu_width || fc->tab.sz.ctu_height != ctu_height;
tl_init(l, 0, changed);
for (int c_idx = 0; c_idx < c_end; c_idx++) {
const int w = width >> (sps ? sps->hshift[c_idx] : 0);
const int h = height >> (sps ? sps->vshift[c_idx] : 0);
TL_ADD(sao_pixel_buffer_h[c_idx], (w * 2 * ctu_height) << ps);
TL_ADD(sao_pixel_buffer_v[c_idx], (h * 2 * ctu_width) << ps);
}
for (int c_idx = 0; c_idx < c_end; c_idx++) {
const int w = width >> (sps ? sps->hshift[c_idx] : 0);
const int h = height >> (sps ? sps->vshift[c_idx] : 0);
const int border_pixels = c_idx ? ALF_BORDER_CHROMA : ALF_BORDER_LUMA;
for (int i = 0; i < 2; i++) {
TL_ADD(alf_pixel_buffer_h[c_idx][i], (w * border_pixels * ctu_height) << ps);
TL_ADD(alf_pixel_buffer_v[c_idx][i], h * ALF_PADDING_SIZE * ctu_width);
}
}
}
static void msm_tl_init(TabList *l, VVCFrameContext *fc)
{
const VVCPPS *pps = fc->ps.pps;
const int w32 = pps ? AV_CEIL_RSHIFT(pps->width, 5) : 0;
const int h32 = pps ? AV_CEIL_RSHIFT(pps->height, 5) : 0;
const int changed = AV_CEIL_RSHIFT(fc->tab.sz.width, 5) != w32 ||
AV_CEIL_RSHIFT(fc->tab.sz.height, 5) != h32;
tl_init(l, 1, changed);
for (int i = LUMA; i <= CHROMA; i++)
TL_ADD(msm[i], w32 * h32);
}
static void ispmf_tl_init(TabList *l, VVCFrameContext *fc)
{
const VVCPPS *pps = fc->ps.pps;
const int w64 = pps ? AV_CEIL_RSHIFT(pps->width, 6) : 0;
const int h64 = pps ? AV_CEIL_RSHIFT(pps->height, 6) : 0;
const int changed = AV_CEIL_RSHIFT(fc->tab.sz.width, 6) != w64 ||
AV_CEIL_RSHIFT(fc->tab.sz.height, 6) != h64;
tl_init(l, 1, changed);
TL_ADD(ispmf, w64 * h64);
}
static void ibc_tl_init(TabList *l, VVCFrameContext *fc)
{
const VVCSPS *sps = fc->ps.sps;
const VVCPPS *pps = fc->ps.pps;
const int ctu_height = pps ? pps->ctb_height : 0;
const int ctu_size = sps ? sps->ctb_size_y : 0;
const int ps = sps ? sps->pixel_shift : 0;
const int chroma_idc = sps ? sps->r->sps_chroma_format_idc : 0;
const int has_ibc = sps ? sps->r->sps_ibc_enabled_flag : 0;
const int changed = fc->tab.sz.chroma_format_idc != chroma_idc ||
fc->tab.sz.ctu_height != ctu_height ||
fc->tab.sz.ctu_size != ctu_size ||
fc->tab.sz.pixel_shift != ps;
fc->tab.sz.ibc_buffer_width = ctu_size ? 2 * MAX_CTU_SIZE * MAX_CTU_SIZE / ctu_size : 0;
tl_init(l, has_ibc, changed);
for (int i = LUMA; i < VVC_MAX_SAMPLE_ARRAYS; i++) {
const int hs = sps ? sps->hshift[i] : 0;
const int vs = sps ? sps->vshift[i] : 0;
TL_ADD(ibc_vir_buf[i], fc->tab.sz.ibc_buffer_width * ctu_size * ctu_height << ps >> hs >> vs);
}
}
typedef void (*tl_init_fn)(TabList *l, VVCFrameContext *fc);
static int frame_context_for_each_tl(VVCFrameContext *fc, int (*unary_fn)(TabList *l))
{
const tl_init_fn init[] = {
ctu_tl_init,
ctu_nz_tl_init,
min_cb_tl_init,
min_pu_tl_init,
min_tu_tl_init,
bs_tl_init,
pixel_buffer_nz_tl_init,
msm_tl_init,
ispmf_tl_init,
ibc_tl_init,
};
for (int i = 0; i < FF_ARRAY_ELEMS(init); i++) {
TabList l;
int ret;
init[i](&l, fc);
ret = unary_fn(&l);
if (ret < 0)
return ret;
}
return 0;
}
static void free_cus(VVCFrameContext *fc)
{
if (fc->tab.ctus) {
for (int i = 0; i < fc->tab.sz.ctu_count; i++)
ff_vvc_ctu_free_cus(fc->tab.ctus + i);
}
}
static void pic_arrays_free(VVCFrameContext *fc)
{
free_cus(fc);
frame_context_for_each_tl(fc, tl_free);
ff_refstruct_pool_uninit(&fc->rpl_tab_pool);
ff_refstruct_pool_uninit(&fc->tab_dmvr_mvf_pool);
memset(&fc->tab.sz, 0, sizeof(fc->tab.sz));
}
static int pic_arrays_init(VVCContext *s, VVCFrameContext *fc)
{
const VVCSPS *sps = fc->ps.sps;
const VVCPPS *pps = fc->ps.pps;
const int ctu_count = pps->ctb_count;
const int pic_size_in_min_pu = pps->min_pu_width * pps->min_pu_height;
int ret;
free_cus(fc);
ret = frame_context_for_each_tl(fc, tl_create);
if (ret < 0)
return ret;
memset(fc->tab.slice_idx, -1, sizeof(*fc->tab.slice_idx) * ctu_count);
if (fc->tab.sz.ctu_count != ctu_count) {
ff_refstruct_pool_uninit(&fc->rpl_tab_pool);
fc->rpl_tab_pool = ff_refstruct_pool_alloc(ctu_count * sizeof(RefPicListTab), 0);
if (!fc->rpl_tab_pool)
return AVERROR(ENOMEM);
}
if (fc->tab.sz.pic_size_in_min_pu != pic_size_in_min_pu) {
ff_refstruct_pool_uninit(&fc->tab_dmvr_mvf_pool);
fc->tab_dmvr_mvf_pool = ff_refstruct_pool_alloc(
pic_size_in_min_pu * sizeof(MvField), FF_REFSTRUCT_POOL_FLAG_ZERO_EVERY_TIME);
if (!fc->tab_dmvr_mvf_pool)
return AVERROR(ENOMEM);
}
fc->tab.sz.ctu_count = pps->ctb_count;
fc->tab.sz.ctu_size = 1 << sps->ctb_log2_size_y << sps->ctb_log2_size_y;
fc->tab.sz.pic_size_in_min_cb = pps->min_cb_width * pps->min_cb_height;
fc->tab.sz.pic_size_in_min_pu = pic_size_in_min_pu;
fc->tab.sz.pic_size_in_min_tu = pps->min_tu_width * pps->min_tu_height;
fc->tab.sz.width = pps->width;
fc->tab.sz.height = pps->height;
fc->tab.sz.ctu_width = pps->ctb_width;
fc->tab.sz.ctu_height = pps->ctb_height;
fc->tab.sz.chroma_format_idc = sps->r->sps_chroma_format_idc;
fc->tab.sz.pixel_shift = sps->pixel_shift;
fc->tab.sz.bs_width = (fc->ps.pps->width >> 2) + 1;
fc->tab.sz.bs_height = (fc->ps.pps->height >> 2) + 1;
return 0;
}
static int min_positive(const int idx, const int diff, const int min_diff)
{
return diff > 0 && (idx < 0 || diff < min_diff);
}
static int max_negtive(const int idx, const int diff, const int max_diff)
{
return diff < 0 && (idx < 0 || diff > max_diff);
}
typedef int (*smvd_find_fxn)(const int idx, const int diff, const int old_diff);
static int8_t smvd_find(const VVCFrameContext *fc, const SliceContext *sc, int lx, smvd_find_fxn find)
{
const H266RawSliceHeader *rsh = sc->sh.r;
const RefPicList *rpl = sc->rpl + lx;
const int poc = fc->ref->poc;
int8_t idx = -1;
int old_diff = -1;
for (int i = 0; i < rsh->num_ref_idx_active[lx]; i++) {
if (!rpl->isLongTerm[i]) {
int diff = poc - rpl->list[i];
if (find(idx, diff, old_diff)) {
idx = i;
old_diff = diff;
}
}
}
return idx;
}
static void smvd_ref_idx(const VVCFrameContext *fc, SliceContext *sc)
{
VVCSH *sh = &sc->sh;
if (IS_B(sh->r)) {
sh->ref_idx_sym[0] = smvd_find(fc, sc, 0, min_positive);
sh->ref_idx_sym[1] = smvd_find(fc, sc, 1, max_negtive);
if (sh->ref_idx_sym[0] == -1 || sh->ref_idx_sym[1] == -1) {
sh->ref_idx_sym[0] = smvd_find(fc, sc, 0, max_negtive);
sh->ref_idx_sym[1] = smvd_find(fc, sc, 1, min_positive);
}
}
}
static void eps_free(SliceContext *slice)
{
av_freep(&slice->eps);
slice->nb_eps = 0;
}
static void slices_free(VVCFrameContext *fc)
{
if (fc->slices) {
for (int i = 0; i < fc->nb_slices_allocated; i++) {
SliceContext *slice = fc->slices[i];
if (slice) {
ff_refstruct_unref(&slice->ref);
ff_refstruct_unref(&slice->sh.r);
eps_free(slice);
av_free(slice);
}
}
av_freep(&fc->slices);
}
fc->nb_slices_allocated = 0;
fc->nb_slices = 0;
}
static int slices_realloc(VVCFrameContext *fc)
{
void *p;
const int size = (fc->nb_slices_allocated + 1) * 3 / 2;
if (fc->nb_slices < fc->nb_slices_allocated)
return 0;
p = av_realloc_array(fc->slices, size, sizeof(*fc->slices));
if (!p)
return AVERROR(ENOMEM);
fc->slices = p;
for (int i = fc->nb_slices_allocated; i < size; i++) {
fc->slices[i] = av_mallocz(sizeof(*fc->slices[0]));
if (!fc->slices[i]) {
fc->nb_slices_allocated = i;
return AVERROR(ENOMEM);
}
fc->slices[i]->slice_idx = i;
}
fc->nb_slices_allocated = size;
return 0;
}
static void ep_init_cabac_decoder(SliceContext *sc, const int index,
const H2645NAL *nal, GetBitContext *gb, const CodedBitstreamUnit *unit)
{
const H266RawSlice *slice = unit->content_ref;
const H266RawSliceHeader *rsh = sc->sh.r;
EntryPoint *ep = sc->eps + index;
int size;
if (index < rsh->num_entry_points) {
int skipped = 0;
int64_t start = (gb->index >> 3);
int64_t end = start + rsh->sh_entry_point_offset_minus1[index] + 1;
while (skipped < nal->skipped_bytes && nal->skipped_bytes_pos[skipped] <= start + slice->header_size) {
skipped++;
}
while (skipped < nal->skipped_bytes && nal->skipped_bytes_pos[skipped] <= end + slice->header_size) {
end--;
skipped++;
}
size = end - start;
size = av_clip(size, 0, get_bits_left(gb) / 8);
} else {
size = get_bits_left(gb) / 8;
}
av_assert0(gb->buffer + get_bits_count(gb) / 8 + size <= gb->buffer_end);
ff_init_cabac_decoder (&ep->cc, gb->buffer + get_bits_count(gb) / 8, size);
skip_bits(gb, size * 8);
}
static int slice_init_entry_points(SliceContext *sc,
VVCFrameContext *fc, const H2645NAL *nal, const CodedBitstreamUnit *unit)
{
const VVCSH *sh = &sc->sh;
const H266RawSlice *slice = unit->content_ref;
int nb_eps = sh->r->num_entry_points + 1;
int ctu_addr = 0;
GetBitContext gb;
if (sc->nb_eps != nb_eps) {
eps_free(sc);
sc->eps = av_calloc(nb_eps, sizeof(*sc->eps));
if (!sc->eps)
return AVERROR(ENOMEM);
sc->nb_eps = nb_eps;
}
init_get_bits8(&gb, slice->data, slice->data_size);
for (int i = 0; i < sc->nb_eps; i++)
{
EntryPoint *ep = sc->eps + i;
ep->ctu_start = ctu_addr;
ep->ctu_end = (i + 1 == sc->nb_eps ? sh->num_ctus_in_curr_slice : sh->entry_point_start_ctu[i]);
for (int j = ep->ctu_start; j < ep->ctu_end; j++) {
const int rs = sc->sh.ctb_addr_in_curr_slice[j];
fc->tab.slice_idx[rs] = sc->slice_idx;
}
ep_init_cabac_decoder(sc, i, nal, &gb, unit);
if (i + 1 < sc->nb_eps)
ctu_addr = sh->entry_point_start_ctu[i];
}
return 0;
}
static VVCFrameContext* get_frame_context(const VVCContext *s, const VVCFrameContext *fc, const int delta)
{
const int size = s->nb_fcs;
const int idx = (fc - s->fcs + delta + size) % size;
return s->fcs + idx;
}
static int ref_frame(VVCFrame *dst, const VVCFrame *src)
{
int ret;
ret = av_frame_ref(dst->frame, src->frame);
if (ret < 0)
return ret;
ff_refstruct_replace(&dst->progress, src->progress);
ff_refstruct_replace(&dst->tab_dmvr_mvf, src->tab_dmvr_mvf);
ff_refstruct_replace(&dst->rpl_tab, src->rpl_tab);
ff_refstruct_replace(&dst->rpl, src->rpl);
dst->nb_rpl_elems = src->nb_rpl_elems;
dst->poc = src->poc;
dst->ctb_count = src->ctb_count;
dst->flags = src->flags;
dst->sequence = src->sequence;
return 0;
}
static av_cold void frame_context_free(VVCFrameContext *fc)
{
slices_free(fc);
ff_refstruct_pool_uninit(&fc->tu_pool);
ff_refstruct_pool_uninit(&fc->cu_pool);
for (int i = 0; i < FF_ARRAY_ELEMS(fc->DPB); i++) {
ff_vvc_unref_frame(fc, &fc->DPB[i], ~0);
av_frame_free(&fc->DPB[i].frame);
}
ff_vvc_frame_thread_free(fc);
pic_arrays_free(fc);
av_frame_free(&fc->output_frame);
ff_vvc_frame_ps_free(&fc->ps);
}
static av_cold int frame_context_init(VVCFrameContext *fc, AVCodecContext *avctx)
{
fc->log_ctx = avctx;
fc->output_frame = av_frame_alloc();
if (!fc->output_frame)
return AVERROR(ENOMEM);
for (int j = 0; j < FF_ARRAY_ELEMS(fc->DPB); j++) {
fc->DPB[j].frame = av_frame_alloc();
if (!fc->DPB[j].frame)
return AVERROR(ENOMEM);
}
fc->cu_pool = ff_refstruct_pool_alloc(sizeof(CodingUnit), 0);
if (!fc->cu_pool)
return AVERROR(ENOMEM);
fc->tu_pool = ff_refstruct_pool_alloc(sizeof(TransformUnit), 0);
if (!fc->tu_pool)
return AVERROR(ENOMEM);
return 0;
}
static int frame_context_setup(VVCFrameContext *fc, VVCContext *s)
{
int ret;
fc->ref = NULL;
// copy refs from the last frame
if (s->nb_frames && s->nb_fcs > 1) {
VVCFrameContext *prev = get_frame_context(s, fc, -1);
for (int i = 0; i < FF_ARRAY_ELEMS(fc->DPB); i++) {
ff_vvc_unref_frame(fc, &fc->DPB[i], ~0);
if (prev->DPB[i].frame->buf[0]) {
ret = ref_frame(&fc->DPB[i], &prev->DPB[i]);
if (ret < 0)
return ret;
}
}
}
if (IS_IDR(s)) {
s->seq_decode = (s->seq_decode + 1) & 0xff;
ff_vvc_clear_refs(fc);
}
ret = pic_arrays_init(s, fc);
if (ret < 0)
return ret;
ff_vvc_dsp_init(&fc->vvcdsp, fc->ps.sps->bit_depth);
ff_videodsp_init(&fc->vdsp, fc->ps.sps->bit_depth);
return 0;
}
static int frame_start(VVCContext *s, VVCFrameContext *fc, SliceContext *sc)
{
const VVCPH *ph = &fc->ps.ph;
const H266RawSliceHeader *rsh = sc->sh.r;
int ret;
// 8.3.1 Decoding process for picture order count
if (!s->temporal_id && !ph->r->ph_non_ref_pic_flag && !(IS_RASL(s) || IS_RADL(s)))
s->poc_tid0 = ph->poc;
if ((ret = ff_vvc_set_new_ref(s, fc, &fc->frame)) < 0)
goto fail;
if (!IS_IDR(s))
ff_vvc_bump_frame(s, fc);
av_frame_unref(fc->output_frame);
if ((ret = ff_vvc_output_frame(s, fc, fc->output_frame,rsh->sh_no_output_of_prior_pics_flag, 0)) < 0)
goto fail;
if ((ret = ff_vvc_frame_rpl(s, fc, sc)) < 0)
goto fail;
if ((ret = ff_vvc_frame_thread_init(fc)) < 0)
goto fail;
return 0;
fail:
if (fc->ref)
ff_vvc_unref_frame(fc, fc->ref, ~0);
fc->ref = NULL;
return ret;
}
static int slice_start(SliceContext *sc, VVCContext *s, VVCFrameContext *fc,
const CodedBitstreamUnit *unit, const int is_first_slice)
{
VVCSH *sh = &sc->sh;
int ret;
ret = ff_vvc_decode_sh(sh, &fc->ps, unit);
if (ret < 0)
return ret;
ff_refstruct_replace(&sc->ref, unit->content_ref);
if (is_first_slice) {
ret = frame_start(s, fc, sc);
if (ret < 0)
return ret;
} else if (fc->ref) {
if (!IS_I(sh->r)) {
ret = ff_vvc_slice_rpl(s, fc, sc);
if (ret < 0) {
av_log(fc->log_ctx, AV_LOG_WARNING,
"Error constructing the reference lists for the current slice.\n");
return ret;
}
}
} else {
av_log(fc->log_ctx, AV_LOG_ERROR, "First slice in a frame missing.\n");
return ret;
}
if (!IS_I(sh->r))
smvd_ref_idx(fc, sc);
return 0;
}
static void export_frame_params(VVCContext *s, const VVCFrameContext *fc)
{
AVCodecContext *c = s->avctx;
const VVCSPS *sps = fc->ps.sps;
const VVCPPS *pps = fc->ps.pps;
c->pix_fmt = sps->pix_fmt;
c->coded_width = pps->width;
c->coded_height = pps->height;
c->width = pps->width - ((pps->r->pps_conf_win_left_offset + pps->r->pps_conf_win_right_offset) << sps->hshift[CHROMA]);
c->height = pps->height - ((pps->r->pps_conf_win_top_offset + pps->r->pps_conf_win_bottom_offset) << sps->vshift[CHROMA]);
}
static int frame_setup(VVCFrameContext *fc, VVCContext *s)
{
int ret = ff_vvc_decode_frame_ps(&fc->ps, s);
if (ret < 0)
return ret;
ret = frame_context_setup(fc, s);
if (ret < 0)
return ret;
export_frame_params(s, fc);
return ret;
}
static int decode_slice(VVCContext *s, VVCFrameContext *fc, const H2645NAL *nal, const CodedBitstreamUnit *unit)
{
int ret;
SliceContext *sc;
const int is_first_slice = !fc->nb_slices;
ret = slices_realloc(fc);
if (ret < 0)
return ret;
sc = fc->slices[fc->nb_slices];
s->vcl_unit_type = nal->type;
if (is_first_slice) {
ret = frame_setup(fc, s);
if (ret < 0)
return ret;
}
ret = slice_start(sc, s, fc, unit, is_first_slice);
if (ret < 0)
return ret;
ret = slice_init_entry_points(sc, fc, nal, unit);
if (ret < 0)
return ret;
fc->nb_slices++;
return 0;
}
static int decode_nal_unit(VVCContext *s, VVCFrameContext *fc, const H2645NAL *nal, const CodedBitstreamUnit *unit)
{
int ret;
s->temporal_id = nal->temporal_id;
if (nal->nuh_layer_id > 0) {
avpriv_report_missing_feature(fc->log_ctx,
"Decoding of multilayer bitstreams");
return AVERROR_PATCHWELCOME;
}
switch (unit->type) {
case VVC_VPS_NUT:
case VVC_SPS_NUT:
case VVC_PPS_NUT:
/* vps, sps, sps cached by s->cbc */
break;
case VVC_TRAIL_NUT:
case VVC_STSA_NUT:
case VVC_RADL_NUT:
case VVC_RASL_NUT:
case VVC_IDR_W_RADL:
case VVC_IDR_N_LP:
case VVC_CRA_NUT:
case VVC_GDR_NUT:
ret = decode_slice(s, fc, nal, unit);
if (ret < 0)
return ret;
break;
case VVC_PREFIX_APS_NUT:
case VVC_SUFFIX_APS_NUT:
ret = ff_vvc_decode_aps(&s->ps, unit);
if (ret < 0)
return ret;
break;
}
return 0;
}
static int decode_nal_units(VVCContext *s, VVCFrameContext *fc, AVPacket *avpkt)
{
const CodedBitstreamH266Context *h266 = s->cbc->priv_data;
CodedBitstreamFragment *frame = &s->current_frame;
int ret = 0;
int eos_at_start = 1;
s->last_eos = s->eos;
s->eos = 0;
ff_cbs_fragment_reset(frame);
ret = ff_cbs_read_packet(s->cbc, frame, avpkt);
if (ret < 0) {
av_log(s->avctx, AV_LOG_ERROR, "Failed to read packet.\n");
return ret;
}
/* decode the NAL units */
for (int i = 0; i < frame->nb_units; i++) {
const H2645NAL *nal = h266->common.read_packet.nals + i;
const CodedBitstreamUnit *unit = frame->units + i;
if (unit->type == VVC_EOB_NUT || unit->type == VVC_EOS_NUT) {
if (eos_at_start)
s->last_eos = 1;
else
s->eos = 1;
} else {
ret = decode_nal_unit(s, fc, nal, unit);
if (ret < 0) {
av_log(s->avctx, AV_LOG_WARNING,
"Error parsing NAL unit #%d.\n", i);
goto fail;
}
}
}
return 0;
fail:
if (fc->ref)
ff_vvc_report_frame_finished(fc->ref);
return ret;
}
static int set_output_format(const VVCContext *s, const AVFrame *output)
{
AVCodecContext *c = s->avctx;
int ret;
if (output->width != c->width || output->height != c->height) {
if ((ret = ff_set_dimensions(c, output->width, output->height)) < 0)
return ret;
}
c->pix_fmt = output->format;
return 0;
}
static int wait_delayed_frame(VVCContext *s, AVFrame *output, int *got_output)
{
VVCFrameContext *delayed = get_frame_context(s, s->fcs, s->nb_frames - s->nb_delayed);
int ret = ff_vvc_frame_wait(s, delayed);
if (!ret && delayed->output_frame->buf[0] && output) {
av_frame_move_ref(output, delayed->output_frame);
ret = set_output_format(s, output);
if (!ret)
*got_output = 1;
}
s->nb_delayed--;
return ret;
}
static int submit_frame(VVCContext *s, VVCFrameContext *fc, AVFrame *output, int *got_output)
{
int ret;
s->nb_frames++;
s->nb_delayed++;
ff_vvc_frame_submit(s, fc);
if (s->nb_delayed >= s->nb_fcs) {
if ((ret = wait_delayed_frame(s, output, got_output)) < 0)
return ret;
}
return 0;
}
static int get_decoded_frame(VVCContext *s, AVFrame *output, int *got_output)
{
int ret;
while (s->nb_delayed) {
if ((ret = wait_delayed_frame(s, output, got_output)) < 0)
return ret;
if (*got_output)
return 0;
}
if (s->nb_frames) {
//we still have frames cached in dpb.
VVCFrameContext *last = get_frame_context(s, s->fcs, s->nb_frames - 1);
ret = ff_vvc_output_frame(s, last, output, 0, 1);
if (ret < 0)
return ret;
if (ret) {
*got_output = ret;
if ((ret = set_output_format(s, output)) < 0)
return ret;
}
}
return 0;
}
static int vvc_decode_frame(AVCodecContext *avctx, AVFrame *output,
int *got_output, AVPacket *avpkt)
{
VVCContext *s = avctx->priv_data;
VVCFrameContext *fc;
int ret;
if (!avpkt->size)
return get_decoded_frame(s, output, got_output);
fc = get_frame_context(s, s->fcs, s->nb_frames);
fc->nb_slices = 0;
fc->decode_order = s->nb_frames;
ret = decode_nal_units(s, fc, avpkt);
if (ret < 0)
return ret;
if (!fc->ft)
return avpkt->size;
ret = submit_frame(s, fc, output, got_output);
if (ret < 0)
return ret;
return avpkt->size;
}
static av_cold void vvc_decode_flush(AVCodecContext *avctx)
{
VVCContext *s = avctx->priv_data;
int got_output = 0;
while (s->nb_delayed)
wait_delayed_frame(s, NULL, &got_output);
if (s->fcs) {
VVCFrameContext *last = get_frame_context(s, s->fcs, s->nb_frames - 1);
ff_vvc_flush_dpb(last);
}
s->ps.sps_id_used = 0;
s->eos = 1;
}
static av_cold int vvc_decode_free(AVCodecContext *avctx)
{
VVCContext *s = avctx->priv_data;
ff_cbs_fragment_free(&s->current_frame);
vvc_decode_flush(avctx);
ff_vvc_executor_free(&s->executor);
if (s->fcs) {
for (int i = 0; i < s->nb_fcs; i++)
frame_context_free(s->fcs + i);
av_free(s->fcs);
}
ff_vvc_ps_uninit(&s->ps);
ff_cbs_close(&s->cbc);
return 0;
}
static av_cold void init_default_scale_m(void)
{
memset(&ff_vvc_default_scale_m, 16, sizeof(ff_vvc_default_scale_m));
}
#define VVC_MAX_DELAYED_FRAMES 16
static av_cold int vvc_decode_init(AVCodecContext *avctx)
{
VVCContext *s = avctx->priv_data;
static AVOnce init_static_once = AV_ONCE_INIT;
const int cpu_count = av_cpu_count();
const int delayed = FFMIN(cpu_count, VVC_MAX_DELAYED_FRAMES);
const int thread_count = avctx->thread_count ? avctx->thread_count : delayed;
int ret;
s->avctx = avctx;
ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_VVC, avctx);
if (ret)
return ret;
if (avctx->extradata_size > 0 && avctx->extradata) {
ret = ff_cbs_read_extradata_from_codec(s->cbc, &s->current_frame, avctx);
if (ret < 0)
return ret;
}
s->nb_fcs = (avctx->flags & AV_CODEC_FLAG_LOW_DELAY) ? 1 : delayed;
s->fcs = av_calloc(s->nb_fcs, sizeof(*s->fcs));
if (!s->fcs)
return AVERROR(ENOMEM);
for (int i = 0; i < s->nb_fcs; i++) {
VVCFrameContext *fc = s->fcs + i;
ret = frame_context_init(fc, avctx);
if (ret < 0)
return ret;
}
s->executor = ff_vvc_executor_alloc(s, thread_count);
if (!s->executor)
return AVERROR(ENOMEM);
s->eos = 1;
GDR_SET_RECOVERED(s);
ff_thread_once(&init_static_once, init_default_scale_m);
return 0;
}
const FFCodec ff_vvc_decoder = {
.p.name = "vvc",
.p.long_name = NULL_IF_CONFIG_SMALL("VVC (Versatile Video Coding)"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_VVC,
.priv_data_size = sizeof(VVCContext),
.init = vvc_decode_init,
.close = vvc_decode_free,
FF_CODEC_DECODE_CB(vvc_decode_frame),
.flush = vvc_decode_flush,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS |
AV_CODEC_CAP_EXPERIMENTAL,
.caps_internal = FF_CODEC_CAP_EXPORTS_CROPPING | FF_CODEC_CAP_INIT_CLEANUP |
FF_CODEC_CAP_AUTO_THREADS,
.p.profiles = NULL_IF_CONFIG_SMALL(ff_vvc_profiles),
};
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