[FFmpeg-devel] [PATCH 7/9] avcodec/nvenc: add MV-HEVC encoding support
Timo Rothenpieler
timo at rothenpieler.org
Thu Jan 30 21:40:44 EET 2025
From: Diego de Souza <ddesouza at nvidia.com>
Added support for MV-HEVC encoding for stereoscopic videos (2 views
only). Compatible with the framepack filter when using the
AV_STEREO3D_FRAMESEQUENCE format.
Signed-off-by: Diego de Souza <ddesouza at nvidia.com>
---
libavcodec/nvenc.c | 49 +++++++++++++++++++++++++++++++++++++++++
libavcodec/nvenc.h | 4 ++++
libavcodec/nvenc_hevc.c | 6 +++++
3 files changed, 59 insertions(+)
diff --git a/libavcodec/nvenc.c b/libavcodec/nvenc.c
index 3403fa8996..a528f1ce93 100644
--- a/libavcodec/nvenc.c
+++ b/libavcodec/nvenc.c
@@ -35,6 +35,7 @@
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
#include "libavutil/mathematics.h"
+#include "libavutil/stereo3d.h"
#include "atsc_a53.h"
#include "codec_desc.h"
#include "encode.h"
@@ -656,6 +657,14 @@ static int nvenc_check_capabilities(AVCodecContext *avctx)
ctx->support_dyn_bitrate = nvenc_check_cap(avctx, NV_ENC_CAPS_SUPPORT_DYN_BITRATE_CHANGE);
+#ifdef NVENC_HAVE_MVHEVC
+ ret = nvenc_check_cap(avctx, NV_ENC_CAPS_SUPPORT_MVHEVC_ENCODE);
+ if(ctx->multiview && ret <= 0) {
+ av_log(avctx, AV_LOG_WARNING, "Multiview not supported by the device\n");
+ return AVERROR(ENOSYS);
+ }
+#endif
+
return 0;
}
@@ -1544,6 +1553,11 @@ static av_cold int nvenc_setup_hevc_config(AVCodecContext *avctx)
}
#endif
+#ifdef NVENC_HAVE_MVHEVC
+ hevc->enableMVHEVC = ctx->multiview;
+ hevc->outputHevc3DReferenceDisplayInfo = ctx->display_sei;
+#endif
+
return 0;
}
@@ -2469,6 +2483,9 @@ static int nvenc_set_timestamp(AVCodecContext *avctx,
// This can be more than necessary, but we don't know the real reorder delay.
delay = FFMAX(ctx->encode_config.frameIntervalP - 1, 0);
+#ifdef NVENC_HAVE_MVHEVC
+ delay *= ctx->multiview + 1;
+#endif
if (ctx->output_frame_num >= delay) {
pkt->dts = timestamp_queue_dequeue(ctx->timestamp_list);
ctx->output_frame_num++;
@@ -2875,6 +2892,9 @@ static int nvenc_send_frame(AVCodecContext *avctx, const AVFrame *frame)
int res, res2;
int sei_count = 0;
int i;
+#ifdef NVENC_HAVE_MVHEVC
+ HEVC_3D_REFERENCE_DISPLAY_INFO ref_disp_info = { 0 };
+#endif
NvencContext *ctx = avctx->priv_data;
NvencDynLoadFunctions *dl_fn = &ctx->nvenc_dload_funcs;
@@ -2952,6 +2972,35 @@ static int nvenc_send_frame(AVCodecContext *avctx, const AVFrame *frame)
if (res < 0)
return res;
+#ifdef NVENC_HAVE_MVHEVC
+ if (ctx->multiview)
+ {
+ const AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_STEREO3D);
+ if (sd)
+ {
+ const AVStereo3D *stereo = (const AVStereo3D*)sd->data;
+ if (stereo->type == AV_STEREO3D_FRAMESEQUENCE) {
+ ctx->next_view_id = (stereo->view == AV_STEREO3D_VIEW_LEFT) ? 0 : 1;
+ } else {
+ sd = NULL;
+ av_log(avctx, AV_LOG_ERROR, "Stereo format %d not supported! Only AV_STEREO3D_FRAMESEQUENCE is supported!\n", stereo->type);
+ }
+ }
+
+ pic_params.codecPicParams.hevcPicParams.viewId = ctx->next_view_id;
+ if (!sd)
+ ctx->next_view_id ^= 1;
+
+ if (ctx->display_sei)
+ {
+ ref_disp_info.precRefDisplayWidth = 31;
+ ref_disp_info.leftViewId[0] = 0;
+ ref_disp_info.rightViewId[0] = 1;
+ pic_params.codecPicParams.hevcPicParams.p3DReferenceDisplayInfo = &ref_disp_info;
+ }
+ }
+#endif
+
nv_status = p_nvenc->nvEncEncodePicture(ctx->nvencoder, &pic_params);
for (i = 0; i < sei_count; i++)
diff --git a/libavcodec/nvenc.h b/libavcodec/nvenc.h
index 6f7f8d4e7f..77aef3f188 100644
--- a/libavcodec/nvenc.h
+++ b/libavcodec/nvenc.h
@@ -99,6 +99,7 @@ typedef void ID3D11Device;
#define NVENC_HAVE_422_SUPPORT
#define NVENC_HAVE_AV1_UHQ_TUNING
#define NVENC_HAVE_H264_AND_AV1_TEMPORAL_FILTER
+#define NVENC_HAVE_MVHEVC
#endif
typedef struct NvencSurface
@@ -245,6 +246,7 @@ typedef struct NvencContext
void *nvencoder;
uint32_t frame_idx_counter;
+ uint32_t next_view_id;
int preset;
int profile;
@@ -291,6 +293,7 @@ typedef struct NvencContext
int single_slice_intra_refresh;
int constrained_encoding;
int udu_sei;
+ int display_sei;
int timing_info;
int highbitdepth;
int max_slice_size;
@@ -299,6 +302,7 @@ typedef struct NvencContext
int lookahead_level;
int unidir_b;
int split_encode_mode;
+ int multiview;
} NvencContext;
int ff_nvenc_encode_init(AVCodecContext *avctx);
diff --git a/libavcodec/nvenc_hevc.c b/libavcodec/nvenc_hevc.c
index 5696e14dd4..f821eaee50 100644
--- a/libavcodec/nvenc_hevc.c
+++ b/libavcodec/nvenc_hevc.c
@@ -194,6 +194,12 @@ static const AVOption options[] = {
OFFSET(extra_sei), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, VE },
{ "udu_sei", "Pass on user data unregistered SEI if available",
OFFSET(udu_sei), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
+#ifdef NVENC_HAVE_MVHEVC
+ { "display_sei", "Pass on 3D reference display information SEI message for MV-HEVC",
+ OFFSET(display_sei), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
+ { "mvhevc", "Set to 1 to enable MV-HEVC. This feature currently supports only 2 views",
+ OFFSET(multiview), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
+#endif
{ "intra-refresh","Use Periodic Intra Refresh instead of IDR frames",
OFFSET(intra_refresh),AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
{ "single-slice-intra-refresh", "Use single slice intra refresh",
--
2.45.2
More information about the ffmpeg-devel
mailing list