lavc/videotoolbox: add VP9 hardware acceleration

On M1 Max, this supports profiles 0 and 2, but not 1 and 3.

1 files changed, 140 insertions, 0 deletions

diff --git a/libavcodec/videotoolbox_vp9.c b/libavcodec/videotoolbox_vp9.c
new file mode 100644
index 0000000000..1b6d08f00b
--- /dev/null
+++ b/libavcodec/videotoolbox_vp9.c
@@ -0,0 +1,140 @@
+/*
+ * Videotoolbox hardware acceleration for VP9
+ *
+ * copyright (c) 2021 rcombs
+ *
+ * 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 "config.h"
+#include "videotoolbox.h"
+#include "libavutil/hwcontext_videotoolbox.h"
+#include "vt_internal.h"
+#include "libavutil/avutil.h"
+#include "libavutil/frame.h"
+#include "libavutil/hwcontext.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/pixdesc.h"
+#include "decode.h"
+#include "internal.h"
+#include "vp9shared.h"
+
+enum VPX_CHROMA_SUBSAMPLING
+{
+    VPX_SUBSAMPLING_420_VERTICAL = 0,
+    VPX_SUBSAMPLING_420_COLLOCATED_WITH_LUMA = 1,
+    VPX_SUBSAMPLING_422 = 2,
+    VPX_SUBSAMPLING_444 = 3,
+};
+
+static int get_vpx_chroma_subsampling(enum AVPixelFormat pixel_format,
+                                      enum AVChromaLocation chroma_location)
+{
+    int chroma_w, chroma_h;
+    if (av_pix_fmt_get_chroma_sub_sample(pixel_format, &chroma_w, &chroma_h) == 0) {
+        if (chroma_w == 1 && chroma_h == 1) {
+            return (chroma_location == AVCHROMA_LOC_LEFT)
+                       ? VPX_SUBSAMPLING_420_VERTICAL
+                       : VPX_SUBSAMPLING_420_COLLOCATED_WITH_LUMA;
+        } else if (chroma_w == 1 && chroma_h == 0) {
+            return VPX_SUBSAMPLING_422;
+        } else if (chroma_w == 0 && chroma_h == 0) {
+            return VPX_SUBSAMPLING_444;
+        }
+    }
+    return -1;
+}
+
+CFDataRef ff_videotoolbox_vpcc_extradata_create(AVCodecContext *avctx)
+{
+    const VP9SharedContext *h = avctx->priv_data;
+    CFDataRef data = NULL;
+    uint8_t *p;
+    int vt_extradata_size;
+    uint8_t *vt_extradata;
+    int subsampling = get_vpx_chroma_subsampling(avctx->sw_pix_fmt, avctx->chroma_sample_location);
+
+    vt_extradata_size = 1 + 3 + 6 + 2;
+    vt_extradata = av_malloc(vt_extradata_size);
+
+    if (subsampling < 0)
+        return NULL;
+
+    if (!vt_extradata)
+        return NULL;
+
+    p = vt_extradata;
+
+    *p++ = 1; /* version */
+    AV_WB24(p + 1, 0); /* flags */
+    p += 3;
+
+   *p++ = h->h.profile;
+   *p++ = avctx->level;
+   *p++ = (h->h.bpp << 4) | (subsampling << 1) | (avctx->color_range == AVCOL_RANGE_JPEG);
+   *p++ = avctx->color_primaries;
+   *p++ = avctx->color_trc;
+   *p++ = avctx->colorspace;
+
+    AV_WB16(p + 0, 0);
+    p += 2;
+
+    av_assert0(p - vt_extradata == vt_extradata_size);
+
+    data = CFDataCreate(kCFAllocatorDefault, vt_extradata, vt_extradata_size);
+    av_free(vt_extradata);
+    return data;
+}
+
+static int videotoolbox_vp9_start_frame(AVCodecContext *avctx,
+                                        const uint8_t *buffer,
+                                        uint32_t size)
+{
+    return 0;
+}
+
+static int videotoolbox_vp9_decode_slice(AVCodecContext *avctx,
+                                         const uint8_t *buffer,
+                                         uint32_t size)
+{
+    VTContext *vtctx = avctx->internal->hwaccel_priv_data;
+
+    return ff_videotoolbox_buffer_copy(vtctx, buffer, size);
+}
+
+static int videotoolbox_vp9_end_frame(AVCodecContext *avctx)
+{
+    const VP9SharedContext *h = avctx->priv_data;
+    AVFrame *frame = h->frames[CUR_FRAME].tf.f;
+
+    return ff_videotoolbox_common_end_frame(avctx, frame);
+}
+
+const AVHWAccel ff_vp9_videotoolbox_hwaccel = {
+    .name           = "vp9_videotoolbox",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_VP9,
+    .pix_fmt        = AV_PIX_FMT_VIDEOTOOLBOX,
+    .alloc_frame    = ff_videotoolbox_alloc_frame,
+    .start_frame    = videotoolbox_vp9_start_frame,
+    .decode_slice   = videotoolbox_vp9_decode_slice,
+    .end_frame      = videotoolbox_vp9_end_frame,
+    .frame_params   = ff_videotoolbox_frame_params,
+    .init           = ff_videotoolbox_common_init,
+    .uninit         = ff_videotoolbox_uninit,
+    .priv_data_size = sizeof(VTContext),
+};