1/*
2 * MJPEG HW decode acceleration through NVDEC
3 *
4 * Copyright (c) 2017 Philip Langdale
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23#include "config_components.h"
24
25#include "avcodec.h"
26#include "internal.h"
27#include "mjpegdec.h"
28#include "nvdec.h"
29#include "decode.h"
30
31static int nvdec_mjpeg_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
32{
33    MJpegDecodeContext *s = avctx->priv_data;
34
35    NVDECContext      *ctx = avctx->internal->hwaccel_priv_data;
36    CUVIDPICPARAMS     *pp = &ctx->pic_params;
37    FrameDecodeData *fdd;
38    NVDECFrame *cf;
39    AVFrame *cur_frame = s->picture;
40
41    int ret;
42
43    ret = ff_nvdec_start_frame(avctx, cur_frame);
44    if (ret < 0)
45        return ret;
46
47    fdd = (FrameDecodeData*)cur_frame->private_ref->data;
48    cf  = (NVDECFrame*)fdd->hwaccel_priv;
49
50    *pp = (CUVIDPICPARAMS) {
51        .PicWidthInMbs     = (cur_frame->width  + 15) / 16,
52        .FrameHeightInMbs  = (cur_frame->height + 15) / 16,
53        .CurrPicIdx        = cf->idx,
54
55        .intra_pic_flag    = 1,
56        .ref_pic_flag      = 0,
57    };
58
59    return ff_nvdec_simple_decode_slice(avctx, buffer, size);
60}
61
62static int nvdec_mjpeg_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
63{
64    return 0;
65}
66
67static int nvdec_mjpeg_frame_params(AVCodecContext *avctx,
68                                  AVBufferRef *hw_frames_ctx)
69{
70    // Only need storage for the current frame
71    return ff_nvdec_frame_params(avctx, hw_frames_ctx, 1, 0);
72}
73
74#if CONFIG_MJPEG_NVDEC_HWACCEL
75AVHWAccel ff_mjpeg_nvdec_hwaccel = {
76    .name                 = "mjpeg_nvdec",
77    .type                 = AVMEDIA_TYPE_VIDEO,
78    .id                   = AV_CODEC_ID_MJPEG,
79    .pix_fmt              = AV_PIX_FMT_CUDA,
80    .start_frame          = nvdec_mjpeg_start_frame,
81    .end_frame            = ff_nvdec_simple_end_frame,
82    .decode_slice         = nvdec_mjpeg_decode_slice,
83    .frame_params         = nvdec_mjpeg_frame_params,
84    .init                 = ff_nvdec_decode_init,
85    .uninit               = ff_nvdec_decode_uninit,
86    .priv_data_size       = sizeof(NVDECContext),
87};
88#endif
89