early-access version 1432

2021-02-09 04:25:58 +01:00
parent de64eab4b4
commit 3d5a9d908a
7336 changed files with 1773492 additions and 111 deletions
--- a/externals/ffmpeg/libavcodec/nvdec_mpeg4.c
+++ b/externals/ffmpeg/libavcodec/nvdec_mpeg4.c
@@ -0,0 +1,121 @@
+/*
+ * MPEG-4 Part 2 HW decode acceleration through NVDEC
+ *
+ * Copyright (c) 2017 Philip Langdale
+ *
+ * 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 "avcodec.h"
+#include "mpeg4video.h"
+#include "nvdec.h"
+#include "decode.h"
+
+static int nvdec_mpeg4_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
+{
+    Mpeg4DecContext *m = avctx->priv_data;
+    MpegEncContext *s = &m->m;
+
+    NVDECContext      *ctx = avctx->internal->hwaccel_priv_data;
+    CUVIDPICPARAMS     *pp = &ctx->pic_params;
+    CUVIDMPEG4PICPARAMS *ppc = &pp->CodecSpecific.mpeg4;
+    FrameDecodeData *fdd;
+    NVDECFrame *cf;
+    AVFrame *cur_frame = s->current_picture.f;
+
+    int ret, i;
+
+    ret = ff_nvdec_start_frame(avctx, cur_frame);
+    if (ret < 0)
+        return ret;
+
+    fdd = (FrameDecodeData*)cur_frame->private_ref->data;
+    cf  = (NVDECFrame*)fdd->hwaccel_priv;
+
+    *pp = (CUVIDPICPARAMS) {
+        .PicWidthInMbs     = (cur_frame->width  + 15) / 16,
+        .FrameHeightInMbs  = (cur_frame->height + 15) / 16,
+        .CurrPicIdx        = cf->idx,
+
+        .intra_pic_flag    = s->pict_type == AV_PICTURE_TYPE_I,
+        .ref_pic_flag      = s->pict_type == AV_PICTURE_TYPE_I ||
+                             s->pict_type == AV_PICTURE_TYPE_P ||
+                             s->pict_type == AV_PICTURE_TYPE_S,
+
+        .CodecSpecific.mpeg4 = {
+            .ForwardRefIdx                = ff_nvdec_get_ref_idx(s->last_picture.f),
+            .BackwardRefIdx               = ff_nvdec_get_ref_idx(s->next_picture.f),
+
+            .video_object_layer_width     = s->width,
+            .video_object_layer_height    = s->height,
+            .vop_time_increment_bitcount  = m->time_increment_bits,
+            .top_field_first              = s->top_field_first,
+            .resync_marker_disable        = !m->resync_marker,
+            .quant_type                   = s->mpeg_quant,
+            .quarter_sample               = s->quarter_sample,
+            .short_video_header           = avctx->codec->id == AV_CODEC_ID_H263,
+            .divx_flags                   = s->divx_packed ? 5 : 0,
+
+            .vop_coding_type              = s->pict_type - AV_PICTURE_TYPE_I,
+            .vop_coded                    = 1,
+            .vop_rounding_type            = s->no_rounding,
+            .alternate_vertical_scan_flag = s->alternate_scan,
+            .interlaced                   = !s->progressive_sequence,
+            .vop_fcode_forward            = s->f_code,
+            .vop_fcode_backward           = s->b_code,
+            .trd                          = { s->pp_time, s->pp_field_time >> 1 },
+            .trb                          = { s->pb_time, s->pb_field_time >> 1 },
+
+            .gmc_enabled                  = s->pict_type == AV_PICTURE_TYPE_S &&
+                                            m->vol_sprite_usage == GMC_SPRITE,
+        }
+    };
+
+    for (i = 0; i < 64; ++i) {
+        ppc->QuantMatrixIntra[i] = s->intra_matrix[i];
+        ppc->QuantMatrixInter[i] = s->inter_matrix[i];
+    }
+
+    // We need to pass the full frame buffer and not just the slice
+    return ff_nvdec_simple_decode_slice(avctx, buffer, size);
+}
+
+static int nvdec_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
+{
+    return 0;
+}
+
+static int nvdec_mpeg4_frame_params(AVCodecContext *avctx,
+                                  AVBufferRef *hw_frames_ctx)
+{
+    // Each frame can at most have one P and one B reference
+    return ff_nvdec_frame_params(avctx, hw_frames_ctx, 2, 0);
+}
+
+const AVHWAccel ff_mpeg4_nvdec_hwaccel = {
+    .name                 = "mpeg4_nvdec",
+    .type                 = AVMEDIA_TYPE_VIDEO,
+    .id                   = AV_CODEC_ID_MPEG4,
+    .pix_fmt              = AV_PIX_FMT_CUDA,
+    .start_frame          = nvdec_mpeg4_start_frame,
+    .end_frame            = ff_nvdec_simple_end_frame,
+    .decode_slice         = nvdec_mpeg4_decode_slice,
+    .frame_params         = nvdec_mpeg4_frame_params,
+    .init                 = ff_nvdec_decode_init,
+    .uninit               = ff_nvdec_decode_uninit,
+    .priv_data_size       = sizeof(NVDECContext),
+};