508 lines
15 KiB
C
508 lines
15 KiB
C
/*
|
|
* HEVC video decoder
|
|
*
|
|
* Copyright (C) 2012 - 2013 Guillaume Martres
|
|
* Copyright (C) 2012 - 2013 Gildas Cocherel
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/avassert.h"
|
|
#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;
|
|
|
|
av_buffer_unref(&frame->hwaccel_priv_buf);
|
|
frame->hwaccel_picture_private = 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->width + (1 << s->sps->log2_ctb_size) - 1) >>
|
|
s->sps->log2_ctb_size;
|
|
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;
|
|
|
|
if (s->avctx->hwaccel) {
|
|
const AVHWAccel *hwaccel = s->avctx->hwaccel;
|
|
av_assert0(!frame->hwaccel_picture_private);
|
|
if (hwaccel->frame_priv_data_size) {
|
|
frame->hwaccel_priv_buf = av_buffer_allocz(hwaccel->frame_priv_data_size);
|
|
if (!frame->hwaccel_priv_buf)
|
|
goto fail;
|
|
frame->hwaccel_picture_private = frame->hwaccel_priv_buf->data;
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
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];
|
|
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->frame->format);
|
|
int pixel_shift;
|
|
|
|
if (!desc)
|
|
return AVERROR_BUG;
|
|
|
|
pixel_shift = desc->comp[0].depth_minus1 > 7;
|
|
|
|
ret = av_frame_ref(out, frame->frame);
|
|
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) * out->linesize[i];
|
|
out->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;
|
|
}
|
|
|
|
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->avctx->hwaccel) {
|
|
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;
|
|
|
|
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 = 0;
|
|
|
|
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)
|
|
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, &rps[list], poc, HEVC_FRAME_FLAG_LONG_REF);
|
|
if (ret < 0)
|
|
goto fail;
|
|
}
|
|
|
|
fail:
|
|
/* 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 ret;
|
|
}
|
|
|
|
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;
|
|
}
|