diff mbox series

[FFmpeg-devel,v4,9/9] avcodec: add vvc metadata bsf

Message ID 20210125141507.11012-10-nuomi2021@gmail.com
State Superseded
Headers show
Series add vvc raw demuxer, muxer, parser, metadata bsf
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Commit Message

Nuo Mi Jan. 25, 2021, 2:15 p.m. UTC
use following command to test:
ffmpeg -i in.bin  -c:v copy -bsf vvc_metadata -f vvc out.bin

94.51%(293/310) can bit match with original clips
5.48%(17/310) are not bit match, the original clips has redundant emulation prevent bytes
---
 configure                      |   1 +
 libavcodec/Makefile            |   1 +
 libavcodec/bitstream_filters.c |   1 +
 libavcodec/h266_metadata_bsf.c | 227 +++++++++++++++++++++++++++++++++
 4 files changed, 230 insertions(+)
 create mode 100644 libavcodec/h266_metadata_bsf.c
diff mbox series

Patch

diff --git a/configure b/configure
index 74ff58d7b7..cea5a00119 100755
--- a/configure
+++ b/configure
@@ -3184,6 +3184,7 @@  mjpeg2jpeg_bsf_select="jpegtables"
 mpeg2_metadata_bsf_select="cbs_mpeg2"
 trace_headers_bsf_select="cbs"
 vp9_metadata_bsf_select="cbs_vp9"
+vvc_metadata_bsf_select="cbs_h266"
 
 # external libraries
 aac_at_decoder_deps="audiotoolbox"
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index e736c8300a..1b90d61a26 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -1169,6 +1169,7 @@  OBJS-$(CONFIG_VP9_METADATA_BSF)           += vp9_metadata_bsf.o
 OBJS-$(CONFIG_VP9_RAW_REORDER_BSF)        += vp9_raw_reorder_bsf.o
 OBJS-$(CONFIG_VP9_SUPERFRAME_BSF)         += vp9_superframe_bsf.o
 OBJS-$(CONFIG_VP9_SUPERFRAME_SPLIT_BSF)   += vp9_superframe_split_bsf.o
+OBJS-$(CONFIG_VVC_METADATA_BSF)           += h266_metadata_bsf.o
 
 # thread libraries
 OBJS-$(HAVE_LIBC_MSVCRT)               += file_open.o
diff --git a/libavcodec/bitstream_filters.c b/libavcodec/bitstream_filters.c
index b26d6a910e..001a7bb3a4 100644
--- a/libavcodec/bitstream_filters.c
+++ b/libavcodec/bitstream_filters.c
@@ -60,6 +60,7 @@  extern const AVBitStreamFilter ff_vp9_metadata_bsf;
 extern const AVBitStreamFilter ff_vp9_raw_reorder_bsf;
 extern const AVBitStreamFilter ff_vp9_superframe_bsf;
 extern const AVBitStreamFilter ff_vp9_superframe_split_bsf;
+extern const AVBitStreamFilter ff_vvc_metadata_bsf;
 
 #include "libavcodec/bsf_list.c"
 
diff --git a/libavcodec/h266_metadata_bsf.c b/libavcodec/h266_metadata_bsf.c
new file mode 100644
index 0000000000..1a93aa7e26
--- /dev/null
+++ b/libavcodec/h266_metadata_bsf.c
@@ -0,0 +1,227 @@ 
+/*
+ * 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/common.h"
+#include "libavutil/opt.h"
+
+#include "bsf.h"
+#include "bsf_internal.h"
+#include "cbs.h"
+#include "cbs_bsf.h"
+#include "cbs_h266.h"
+#include "vvc.h"
+
+#define IS_SLICE(nut) (nut <= VVC_RASL_NUT || (nut >= VVC_IDR_W_RADL && nut <= VVC_GDR_NUT))
+#define IS_IDR(nut) (nut == VVC_IDR_W_RADL || nut == VVC_IDR_N_LP)
+
+typedef struct VVCMetadataContext {
+    CBSBSFContext common;
+
+    H266RawAUD aud_nal;
+
+    int aud;
+
+    uint8_t prev_layer_id;
+    int prev_tid0_poc;
+    int prev_poc;
+} VVCMetadataContext;
+
+//8.3.1 Decoding process for picture order count.
+//VTM did not follow the spec, and it's much simpler than spec.
+//We follow the VTM.
+static int get_slice_poc(AVBSFContext *bsf, const H266RawPH *ph,
+                         const H266RawSliceHeader *slice, int *poc)
+{
+    VVCMetadataContext *ctx = bsf->priv_data;
+    CodedBitstreamH266Context *h266 = ctx->common.input->priv_data;
+    int poc_msb, max_poc_lsb, poc_lsb;
+    const H266RawSPS* sps = h266->active_sps;
+
+    if (!sps) {
+        av_log(bsf, AV_LOG_ERROR, "no pps for pu.\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    max_poc_lsb = 1 << (sps->sps_log2_max_pic_order_cnt_lsb_minus4 + 4);
+    poc_lsb = ph->ph_pic_order_cnt_lsb;
+    if (IS_IDR(slice->nal_unit_header.nal_unit_type)) {
+        if (ph->ph_poc_msb_cycle_present_flag)
+            poc_msb = ph->ph_poc_msb_cycle_val * max_poc_lsb;
+        else
+            poc_msb = 0;
+    } else {
+        int prev_poc = ctx->prev_tid0_poc;
+        int prev_poc_lsb = prev_poc & (max_poc_lsb - 1);
+        int prev_poc_msb = prev_poc - prev_poc_lsb;
+        if (ph->ph_poc_msb_cycle_present_flag) {
+             poc_msb = ph->ph_poc_msb_cycle_val * max_poc_lsb;
+        } else {
+            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;
+        }
+    }
+
+    *poc = poc_msb + poc_lsb;
+    return 0;
+}
+
+static int is_au_start(AVBSFContext *bsf, CodedBitstreamFragment *pu)
+{
+    //7.4.2.4.3
+    VVCMetadataContext *ctx = bsf->priv_data;
+    CodedBitstreamH266Context *h266 = ctx->common.input->priv_data;
+    int i, ret;
+    const H266RawNALUnitHeader *nal;
+    const H266RawPH *ph = h266->ph;
+    const H266RawSlice *slice = NULL;
+    int poc, nut;
+
+    if (!ph) {
+        av_log(bsf, AV_LOG_ERROR, "can't find picture header in picutre unit.\n");
+        return AVERROR_INVALIDDATA;
+    }
+    for (i = 0; i < pu->nb_units; i++) {
+        nal = pu->units[i].content;
+        if (!nal)
+            continue;
+        if (IS_SLICE(nal->nal_unit_type)) {
+            slice = pu->units[i].content;
+            break;
+        }
+    }
+    if (!slice) {
+        av_log(bsf, AV_LOG_ERROR, "can't find first slice.\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    if ((ret = get_slice_poc(bsf, ph, &slice->header, &poc)) < 0)
+        return ret;
+
+    ret = nal->nuh_layer_id <= ctx->prev_layer_id || poc != ctx->prev_poc;
+    ctx->prev_layer_id = nal->nuh_layer_id;
+    ctx->prev_poc = poc;
+
+    nut = nal->nal_unit_type;
+    if (nal->nuh_temporal_id_plus1 == 1 &&
+        !ph->ph_non_ref_pic_flag && nut != VVC_RADL_NUT && nut != VVC_RASL_NUT) {
+        ctx->prev_tid0_poc = poc;
+    }
+    return ret;
+}
+
+static int h266_metadata_update_fragment(AVBSFContext *bsf, AVPacket *pkt,
+                               CodedBitstreamFragment *pu)
+{
+    VVCMetadataContext *ctx = bsf->priv_data;
+    int err, i;
+
+    // If an AUD is present, it must be the first NAL unit.
+    if (pu->units[0].type == VVC_AUD_NUT) {
+        if (ctx->aud == BSF_ELEMENT_REMOVE)
+            ff_cbs_delete_unit(pu, 0);
+    } else {
+        if (ctx->aud == BSF_ELEMENT_INSERT && is_au_start(bsf, pu)) {
+            H266RawAUD *aud = &ctx->aud_nal;
+            int pic_type = 0, temporal_id = 8, layer_id = 0;
+            CodedBitstreamH266Context *h266 = ctx->common.input->priv_data;
+            for (i = 0; i < pu->nb_units; i++) {
+                const H266RawNALUnitHeader *nal = pu->units[i].content;
+                if (!nal)
+                    continue;
+                if (nal->nuh_temporal_id_plus1 < temporal_id + 1)
+                    temporal_id = nal->nuh_temporal_id_plus1 - 1;
+
+                if (pu->units[i].type <= VVC_RSV_IRAP_11) {
+                    const H266RawSlice *slice = pu->units[i].content;
+                    layer_id = nal->nuh_layer_id;
+                    if (slice->header.sh_slice_type == VVC_SLICE_TYPE_B &&
+                        pic_type < 2)
+                        pic_type = 2;
+                    if (slice->header.sh_slice_type == VVC_SLICE_TYPE_P &&
+                        pic_type < 1)
+                        pic_type = 1;
+                }
+            }
+
+            aud->nal_unit_header = (H266RawNALUnitHeader) {
+                .nal_unit_type         = VVC_AUD_NUT,
+                .nuh_layer_id          = layer_id,
+                .nuh_temporal_id_plus1 = temporal_id + 1,
+            };
+            aud->aud_pic_type = pic_type;
+            aud->aud_irap_or_gdr_flag = h266->ph->ph_gdr_or_irap_pic_flag;
+
+            err = ff_cbs_insert_unit_content(pu, 0, VVC_AUD_NUT, aud, NULL);
+            if (err < 0) {
+                av_log(bsf, AV_LOG_ERROR, "Failed to insert AUD.\n");
+                return err;
+            }
+        }
+    }
+    return 0;
+}
+
+static const CBSBSFType h266_metadata_type = {
+    .codec_id        = AV_CODEC_ID_VVC,
+    .fragment_name   = "picture unit",
+    .unit_name       = "NAL unit",
+    .update_fragment = &h266_metadata_update_fragment,
+};
+
+static int vvc_metadata_init(AVBSFContext *bsf)
+{
+    VVCMetadataContext *ctx = bsf->priv_data;
+    ctx->prev_layer_id = UINT8_MAX;
+    ctx->prev_poc = INT_MAX;
+    ctx->prev_tid0_poc = INT_MAX;
+    return ff_cbs_bsf_generic_init(bsf, &h266_metadata_type);
+}
+
+#define OFFSET(x) offsetof(VVCMetadataContext, x)
+#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
+static const AVOption vvc_metadata_options[] = {
+    BSF_ELEMENT_OPTIONS_PIR("aud", "Access Unit Delimiter NAL units",
+                            aud, FLAGS),
+
+    { NULL }
+};
+
+static const AVClass vvc_metadata_class = {
+    .class_name = "vvc_metadata_bsf",
+    .item_name  = av_default_item_name,
+    .option     = vvc_metadata_options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+static const enum AVCodecID vvc_metadata_codec_ids[] = {
+    AV_CODEC_ID_VVC, AV_CODEC_ID_NONE,
+};
+
+const AVBitStreamFilter ff_vvc_metadata_bsf = {
+    .name           = "vvc_metadata",
+    .priv_data_size = sizeof(VVCMetadataContext),
+    .priv_class     = &vvc_metadata_class,
+    .init           = &vvc_metadata_init,
+    .close          = &ff_cbs_bsf_generic_close,
+    .filter         = &ff_cbs_bsf_generic_filter,
+    .codec_ids      = vvc_metadata_codec_ids,
+};