From: Zhao Zhili <zhiliz...@tencent.com>
Only implementing what's needed for HEVC with alpha.
---
libavcodec/hevc/ps.c | 64 +++++++++++++++++++++++++++++---------------
libavcodec/hevc/ps.h | 1 +
2 files changed, 43 insertions(+), 22 deletions(-)
diff --git a/libavcodec/hevc/ps.c b/libavcodec/hevc/ps.c
index 5b1bcd9b7c..59df750b91 100644
--- a/libavcodec/hevc/ps.c
+++ b/libavcodec/hevc/ps.c
@@ -460,14 +460,14 @@ static int decode_vps_ext(GetBitContext *gb,
AVCodecContext *avctx, HEVCVPS *vps
uint64_t layer1_id_included)
{
PTL ptl_dummy;
- uint8_t max_sub_layers[HEVC_MAX_LAYERS];
+ uint8_t max_sub_layers[HEVC_MAX_LAYERS] = {1, 1};
int splitting_flag, dimension_id_len, view_id_len, num_add_olss,
num_scalability_types,
default_output_layer_idc, direct_dep_type_len, direct_dep_type,
sub_layers_max_present, sub_layer_flag_info_present_flag, nb_ptl;
unsigned non_vui_extension_length;
- if (vps->vps_max_layers == 1 || vps->vps_num_layer_sets == 1) {
+ if (vps->vps_max_layers == 1) {
av_log(avctx, AV_LOG_VERBOSE, "Ignoring VPS extensions with a single
layer\n");
return 0;
}
@@ -535,7 +535,8 @@ static int decode_vps_ext(GetBitContext *gb, AVCodecContext
*avctx, HEVCVPS *vps
return AVERROR_PATCHWELCOME;
}
- if (!(vps->scalability_mask_flag & HEVC_SCALABILITY_MULTIVIEW)) {
+ if (!(vps->scalability_mask_flag &
+ (HEVC_SCALABILITY_MULTIVIEW | HEVC_SCALABILITY_AUXILIARY))) {
av_log(avctx, AV_LOG_ERROR, "Scalability type %d not supported\n",
15 - ff_ctz(vps->scalability_mask_flag));
return AVERROR_PATCHWELCOME;
@@ -571,16 +572,25 @@ static int decode_vps_ext(GetBitContext *gb,
AVCodecContext *avctx, HEVCVPS *vps
for (int i = 0; i < 2 /* NumViews */; i++)
vps->view_id[i] = get_bits(gb, view_id_len);
- if (!get_bits1(gb) /* direct_dependency_flag */) {
- av_log(avctx, AV_LOG_WARNING, "Independent output layers not
supported\n");
- return AVERROR_PATCHWELCOME;
+ /* direct_dependency_flag */
+ vps->num_direct_ref_layers[1] = get_bits1(gb);
+ if (!vps->num_direct_ref_layers[1]) {
+ vps->num_add_layer_sets = get_ue_golomb(gb);
+ for (int i = 0; i < vps->num_add_layer_sets; i++) {
+ /* highest_layer_idx_plus1 */
+ skip_bits1(gb);
+ }
}
- vps->num_direct_ref_layers[1] = 1;
+ vps->num_output_layer_sets = vps->vps_num_layer_sets +
vps->num_add_layer_sets;
+ if (vps->num_output_layer_sets != 2)
+ return AVERROR_INVALIDDATA;
sub_layers_max_present = get_bits1(gb); //
vps_sub_layers_max_minus1_present_flag
- for (int i = 0; i < vps->vps_max_layers; i++)
- max_sub_layers[i] = sub_layers_max_present ? get_bits(gb, 3) + 1 :
- vps->vps_max_sub_layers;
+ if (sub_layers_max_present) {
+ for (int i = 0; i < vps->vps_max_layers; i++)
+ max_sub_layers[i] = sub_layers_max_present ? get_bits(gb, 3) + 1 :
+
vps->vps_max_sub_layers;
+ }
if (get_bits1(gb) /* max_tid_ref_present_flag */)
skip_bits(gb, 3); // max_tid_il_ref_pics_plus1
@@ -613,18 +623,24 @@ static int decode_vps_ext(GetBitContext *gb,
AVCodecContext *avctx, HEVCVPS *vps
}
/* Consequence of established layer dependencies */
- if (layer1_id_included != ((1 << vps->layer_id_in_nuh[0]) |
+ if (layer1_id_included &&
+ layer1_id_included != ((1 << vps->layer_id_in_nuh[0]) |
(1 << vps->layer_id_in_nuh[1]))) {
- av_log(avctx, AV_LOG_ERROR, "Dependent layer not included in layer
ID?\n");
- return AVERROR_PATCHWELCOME;
+ av_log(avctx, AV_LOG_ERROR,
+ "Dependent layer not included in layer ID?\n");
+ return AVERROR_PATCHWELCOME;
}
+ if (!layer1_id_included)
+ vps->ols[1] = 2;
+ else
+ vps->ols[1] = 3;
- vps->num_output_layer_sets = 2;
- vps->ols[1] = 3;
+ if (vps->vps_num_layer_sets == 1 || default_output_layer_idc == 2)
+ skip_bits1(gb);
for (int j = 0; j < av_popcount64(vps->ols[1]); j++) {
int ptl_idx = get_bits(gb, av_ceil_log2(nb_ptl));
- if (ptl_idx < 1 || ptl_idx >= nb_ptl) {
+ if (ptl_idx >= nb_ptl) {
av_log(avctx, AV_LOG_ERROR, "Invalid PTL index: %d\n", ptl_idx);
return AVERROR_INVALIDDATA;
}
@@ -667,6 +683,8 @@ static int decode_vps_ext(GetBitContext *gb, AVCodecContext
*avctx, HEVCVPS *vps
vps->max_one_active_ref_layer = get_bits1(gb);
vps->poc_lsb_aligned = get_bits1(gb);
+ if (!vps->num_direct_ref_layers[1])
+ vps->poc_lsb_not_present = get_bits1(gb) << 1;
sub_layer_flag_info_present_flag = get_bits1(gb);
for (int j = 0; j < FFMAX(max_sub_layers[0], max_sub_layers[1]); j++) {
@@ -688,12 +706,14 @@ static int decode_vps_ext(GetBitContext *gb,
AVCodecContext *avctx, HEVCVPS *vps
return AVERROR_INVALIDDATA;
}
- skip_bits1(gb); /* direct_depenency_all_layers_flag */
- direct_dep_type = get_bits_long(gb, direct_dep_type_len);
- if (direct_dep_type > HEVC_DEP_TYPE_BOTH) {
- av_log(avctx, AV_LOG_WARNING, "Unsupported direct_dep_type: %d\n",
- direct_dep_type);
- return AVERROR_PATCHWELCOME;
+ /* direct_depenency_all_layers_flag */
+ if (get_bits1(gb)) {
+ direct_dep_type = get_bits_long(gb, direct_dep_type_len);
+ if (direct_dep_type > HEVC_DEP_TYPE_BOTH) {
+ av_log(avctx, AV_LOG_WARNING, "Unsupported direct_dep_type: %d\n",
+ direct_dep_type);
+ return AVERROR_PATCHWELCOME;
+ }
}
non_vui_extension_length = get_ue_golomb(gb);
diff --git a/libavcodec/hevc/ps.h b/libavcodec/hevc/ps.h
index d3465e3d27..2b5c2c0c1d 100644
--- a/libavcodec/hevc/ps.h
+++ b/libavcodec/hevc/ps.h
@@ -237,6 +237,7 @@ typedef struct HEVCVPS {
// NumDirectRefLayers[layer_idx]
uint8_t num_direct_ref_layers[HEVC_VPS_MAX_LAYERS];
+ uint8_t num_add_layer_sets;
RepFormat rep_format;
--
2.46.0
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