mirror of
https://github.com/FFmpeg/FFmpeg.git
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141 lines
4.4 KiB
C
141 lines
4.4 KiB
C
/*
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* Videotoolbox hardware acceleration for VP9
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*
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* copyright (c) 2021 rcombs
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include "videotoolbox.h"
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#include "libavutil/hwcontext_videotoolbox.h"
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#include "vt_internal.h"
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#include "libavutil/avutil.h"
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#include "libavutil/frame.h"
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#include "libavutil/hwcontext.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/pixdesc.h"
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#include "decode.h"
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#include "internal.h"
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#include "vp9shared.h"
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enum VPX_CHROMA_SUBSAMPLING
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{
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VPX_SUBSAMPLING_420_VERTICAL = 0,
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VPX_SUBSAMPLING_420_COLLOCATED_WITH_LUMA = 1,
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VPX_SUBSAMPLING_422 = 2,
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VPX_SUBSAMPLING_444 = 3,
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};
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static int get_vpx_chroma_subsampling(enum AVPixelFormat pixel_format,
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enum AVChromaLocation chroma_location)
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{
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int chroma_w, chroma_h;
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if (av_pix_fmt_get_chroma_sub_sample(pixel_format, &chroma_w, &chroma_h) == 0) {
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if (chroma_w == 1 && chroma_h == 1) {
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return (chroma_location == AVCHROMA_LOC_LEFT)
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? VPX_SUBSAMPLING_420_VERTICAL
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: VPX_SUBSAMPLING_420_COLLOCATED_WITH_LUMA;
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} else if (chroma_w == 1 && chroma_h == 0) {
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return VPX_SUBSAMPLING_422;
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} else if (chroma_w == 0 && chroma_h == 0) {
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return VPX_SUBSAMPLING_444;
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}
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}
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return -1;
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}
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CFDataRef ff_videotoolbox_vpcc_extradata_create(AVCodecContext *avctx)
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{
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const VP9SharedContext *h = avctx->priv_data;
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CFDataRef data = NULL;
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uint8_t *p;
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int vt_extradata_size;
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uint8_t *vt_extradata;
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int subsampling = get_vpx_chroma_subsampling(avctx->sw_pix_fmt, avctx->chroma_sample_location);
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vt_extradata_size = 1 + 3 + 6 + 2;
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vt_extradata = av_malloc(vt_extradata_size);
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if (subsampling < 0)
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return NULL;
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if (!vt_extradata)
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return NULL;
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p = vt_extradata;
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*p++ = 1; /* version */
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AV_WB24(p + 1, 0); /* flags */
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p += 3;
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*p++ = h->h.profile;
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*p++ = avctx->level;
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*p++ = (h->h.bpp << 4) | (subsampling << 1) | (avctx->color_range == AVCOL_RANGE_JPEG);
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*p++ = avctx->color_primaries;
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*p++ = avctx->color_trc;
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*p++ = avctx->colorspace;
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AV_WB16(p + 0, 0);
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p += 2;
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av_assert0(p - vt_extradata == vt_extradata_size);
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data = CFDataCreate(kCFAllocatorDefault, vt_extradata, vt_extradata_size);
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av_free(vt_extradata);
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return data;
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}
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static int videotoolbox_vp9_start_frame(AVCodecContext *avctx,
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const uint8_t *buffer,
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uint32_t size)
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{
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return 0;
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}
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static int videotoolbox_vp9_decode_slice(AVCodecContext *avctx,
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const uint8_t *buffer,
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uint32_t size)
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{
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VTContext *vtctx = avctx->internal->hwaccel_priv_data;
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return ff_videotoolbox_buffer_copy(vtctx, buffer, size);
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}
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static int videotoolbox_vp9_end_frame(AVCodecContext *avctx)
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{
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const VP9SharedContext *h = avctx->priv_data;
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AVFrame *frame = h->frames[CUR_FRAME].tf.f;
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return ff_videotoolbox_common_end_frame(avctx, frame);
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}
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const AVHWAccel ff_vp9_videotoolbox_hwaccel = {
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.name = "vp9_videotoolbox",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_VP9,
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.pix_fmt = AV_PIX_FMT_VIDEOTOOLBOX,
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.alloc_frame = ff_videotoolbox_alloc_frame,
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.start_frame = videotoolbox_vp9_start_frame,
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.decode_slice = videotoolbox_vp9_decode_slice,
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.end_frame = videotoolbox_vp9_end_frame,
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.frame_params = ff_videotoolbox_frame_params,
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.init = ff_videotoolbox_common_init,
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.uninit = ff_videotoolbox_uninit,
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.priv_data_size = sizeof(VTContext),
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};
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