[FFmpeg-devel] [PATCH v2 7/9] avcodec/nvenc: add MV-HEVC encoding support

[Timo Rothenpieler <timo@rothenpieler.org>]

From: Diego de Souza <ddesouza@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@nvidia.com>
---
 libavcodec/nvenc.c      | 70 +++++++++++++++++++++++++++++++++++++++++
 libavcodec/nvenc.h      |  8 +++++
 libavcodec/nvenc_hevc.c |  5 ++-
 3 files changed, 82 insertions(+), 1 deletion(-)

diff --git a/libavcodec/nvenc.c b/libavcodec/nvenc.c
index 3403fa8996..ad53eaaf98 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
+    ctx->multiview_supported = nvenc_check_cap(avctx, NV_ENC_CAPS_SUPPORT_MVHEVC_ENCODE) > 0;
+    if(ctx->profile == NV_ENC_HEVC_PROFILE_MULTIVIEW_MAIN && !ctx->multiview_supported) {
+        av_log(avctx, AV_LOG_WARNING, "Multiview not supported by the device\n");
+        return AVERROR(ENOSYS);
+    }
+#endif
+
     return 0;
 }
 
@@ -1475,6 +1484,13 @@ static av_cold int nvenc_setup_hevc_config(AVCodecContext *avctx)
 
     hevc->outputPictureTimingSEI = 1;
 
+#ifdef NVENC_HAVE_MVHEVC
+    if (ctx->multiview_supported && ctx->profile == NV_ENC_HEVC_PROFILE_MAIN &&
+        (av_frame_side_data_get(avctx->decoded_side_data, avctx->nb_decoded_side_data, AV_FRAME_DATA_STEREO3D) ||
+         av_frame_side_data_get(avctx->decoded_side_data, avctx->nb_decoded_side_data, AV_FRAME_DATA_VIEW_ID)))
+        ctx->profile = NV_ENC_HEVC_PROFILE_MULTIVIEW_MAIN;
+#endif
+
     switch (ctx->profile) {
     case NV_ENC_HEVC_PROFILE_MAIN:
         cc->profileGUID = NV_ENC_HEVC_PROFILE_MAIN_GUID;
@@ -1488,6 +1504,16 @@ static av_cold int nvenc_setup_hevc_config(AVCodecContext *avctx)
         cc->profileGUID = NV_ENC_HEVC_PROFILE_FREXT_GUID;
         avctx->profile  = AV_PROFILE_HEVC_REXT;
         break;
+#ifdef NVENC_HAVE_MVHEVC
+    case NV_ENC_HEVC_PROFILE_MULTIVIEW_MAIN:
+        cc->profileGUID = NV_ENC_HEVC_PROFILE_MAIN_GUID;
+        avctx->profile  = AV_PROFILE_HEVC_MULTIVIEW_MAIN;
+        ctx->multiview  = 1;
+
+        hevc->enableMVHEVC = 1;
+        hevc->outputHevc3DReferenceDisplayInfo = 1;
+        break;
+#endif
     }
 
     // force setting profile as main10 if input is 10 bit or if it should be encoded as 10 bit
@@ -1502,6 +1528,13 @@ static av_cold int nvenc_setup_hevc_config(AVCodecContext *avctx)
         avctx->profile = AV_PROFILE_HEVC_REXT;
     }
 
+#ifdef NVENC_HAVE_MVHEVC
+    if (ctx->multiview && avctx->profile != AV_PROFILE_HEVC_MULTIVIEW_MAIN) {
+        av_log(avctx, AV_LOG_ERROR, "Multiview encoding only works for Main profile content.\n");
+        return AVERROR(EINVAL);
+    }
+#endif
+
     hevc->chromaFormatIDC = IS_YUV444(ctx->data_pix_fmt) ? 3 : IS_YUV422(ctx->data_pix_fmt) ? 2 : 1;
 
 #ifdef NVENC_HAVE_NEW_BIT_DEPTH_API
@@ -2469,6 +2502,9 @@ 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 ? 2 : 1;
+#endif
     if (ctx->output_frame_num >= delay) {
         pkt->dts = timestamp_queue_dequeue(ctx->timestamp_list);
         ctx->output_frame_num++;
@@ -2875,6 +2911,9 @@ 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 +2991,37 @@ 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_stereo3d = av_frame_get_side_data(frame, AV_FRAME_DATA_STEREO3D);
+        const AVFrameSideData *sd_view_id = av_frame_get_side_data(frame, AV_FRAME_DATA_VIEW_ID);
+        int view_ids_reversed = 0;
+
+        if (sd_view_id)
+            ctx->next_view_id = *(int*)sd_view_id->data;
+
+        if (sd_stereo3d) {
+            const AVStereo3D *stereo = (const AVStereo3D*)sd_stereo3d->data;
+
+            if (stereo->type == AV_STEREO3D_FRAMESEQUENCE) {
+                if (!sd_view_id)
+                    ctx->next_view_id = (stereo->view == AV_STEREO3D_VIEW_LEFT) ? 0 : 1;
+                if (stereo->view == AV_STEREO3D_VIEW_LEFT && ctx->next_view_id)
+                    view_ids_reversed = 1;
+            } else
+                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;
+        ctx->next_view_id ^= 1;
+
+        ref_disp_info.precRefDisplayWidth = 31;
+        ref_disp_info.leftViewId[0] = view_ids_reversed ? 1 : 0;
+        ref_disp_info.rightViewId[0] = view_ids_reversed ? 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..d085b08260 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
@@ -172,6 +173,11 @@ enum {
     NV_ENC_HEVC_PROFILE_MAIN,
     NV_ENC_HEVC_PROFILE_MAIN_10,
     NV_ENC_HEVC_PROFILE_REXT,
+#ifdef NVENC_HAVE_MVHEVC
+    NV_ENC_HEVC_PROFILE_MULTIVIEW_MAIN,
+#endif
+
+    NV_ENC_HEVC_PROFILE_COUNT
 };
 
 enum {
@@ -245,6 +251,7 @@ typedef struct NvencContext
     void *nvencoder;
 
     uint32_t frame_idx_counter;
+    uint32_t next_view_id;
 
     int preset;
     int profile;
@@ -299,6 +306,7 @@ typedef struct NvencContext
     int lookahead_level;
     int unidir_b;
     int split_encode_mode;
+    int multiview, multiview_supported;
 } NvencContext;
 
 int ff_nvenc_encode_init(AVCodecContext *avctx);
diff --git a/libavcodec/nvenc_hevc.c b/libavcodec/nvenc_hevc.c
index 5696e14dd4..3c08563c1f 100644
--- a/libavcodec/nvenc_hevc.c
+++ b/libavcodec/nvenc_hevc.c
@@ -60,10 +60,13 @@ static const AVOption options[] = {
     { "ull",         "Ultra low latency",                   0,                    AV_OPT_TYPE_CONST, { .i64 = NV_ENC_TUNING_INFO_ULTRA_LOW_LATENCY },        0, 0, VE, .unit = "tune" },
     { "lossless",    "Lossless",                            0,                    AV_OPT_TYPE_CONST, { .i64 = NV_ENC_TUNING_INFO_LOSSLESS },                 0, 0, VE, .unit = "tune" },
 #endif
-    { "profile",      "Set the encoding profile",           OFFSET(profile),      AV_OPT_TYPE_INT,   { .i64 = NV_ENC_HEVC_PROFILE_MAIN }, NV_ENC_HEVC_PROFILE_MAIN, AV_PROFILE_HEVC_REXT, VE, .unit = "profile" },
+    { "profile",      "Set the encoding profile",           OFFSET(profile),      AV_OPT_TYPE_INT,   { .i64 = NV_ENC_HEVC_PROFILE_MAIN }, NV_ENC_HEVC_PROFILE_MAIN, NV_ENC_HEVC_PROFILE_COUNT - 1, VE, .unit = "profile" },
     { "main",         "",                                   0,                    AV_OPT_TYPE_CONST, { .i64 = NV_ENC_HEVC_PROFILE_MAIN },    0, 0, VE, .unit = "profile" },
     { "main10",       "",                                   0,                    AV_OPT_TYPE_CONST, { .i64 = NV_ENC_HEVC_PROFILE_MAIN_10 }, 0, 0, VE, .unit = "profile" },
     { "rext",         "",                                   0,                    AV_OPT_TYPE_CONST, { .i64 = NV_ENC_HEVC_PROFILE_REXT },    0, 0, VE, .unit = "profile" },
+#ifdef NVENC_HAVE_MVHEVC
+    { "mv",           "",                                   0,                    AV_OPT_TYPE_CONST, { .i64 = NV_ENC_HEVC_PROFILE_MULTIVIEW_MAIN }, 0, 0, VE, .unit = "profile" },
+#endif
     { "level",        "Set the encoding level restriction", OFFSET(level),        AV_OPT_TYPE_INT,   { .i64 = NV_ENC_LEVEL_AUTOSELECT }, NV_ENC_LEVEL_AUTOSELECT, NV_ENC_LEVEL_HEVC_62, VE, .unit = "level" },
     { "auto",         "",                                   0,                    AV_OPT_TYPE_CONST, { .i64 = NV_ENC_LEVEL_AUTOSELECT },  0, 0, VE,  .unit = "level" },
     { "1",            "",                                   0,                    AV_OPT_TYPE_CONST, { .i64 = NV_ENC_LEVEL_HEVC_1 },      0, 0, VE,  .unit = "level" },
-- 
2.45.2

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