avcodec/dump_extradata_bsf: don't allocate a new AVPacket per filtered packet
[ffmpeg.git] / libavcodec / nvdec_mpeg12.c
1 /*
2  * MPEG-1/2 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 "avcodec.h"
24 #include "mpegvideo.h"
25 #include "nvdec.h"
26 #include "decode.h"
27
28 static int nvdec_mpeg12_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
29 {
30     MpegEncContext *s = avctx->priv_data;
31
32     NVDECContext      *ctx = avctx->internal->hwaccel_priv_data;
33     CUVIDPICPARAMS     *pp = &ctx->pic_params;
34     CUVIDMPEG2PICPARAMS *ppc = &pp->CodecSpecific.mpeg2;
35     FrameDecodeData *fdd;
36     NVDECFrame *cf;
37     AVFrame *cur_frame = s->current_picture.f;
38
39     int ret, i;
40
41     ret = ff_nvdec_start_frame(avctx, cur_frame);
42     if (ret < 0)
43         return ret;
44
45     fdd = (FrameDecodeData*)cur_frame->private_ref->data;
46     cf  = (NVDECFrame*)fdd->hwaccel_priv;
47
48     *pp = (CUVIDPICPARAMS) {
49         .PicWidthInMbs     = (cur_frame->width  + 15) / 16,
50         .FrameHeightInMbs  = (cur_frame->height + 15) / 16,
51         .CurrPicIdx        = cf->idx,
52
53         .intra_pic_flag    = s->pict_type == AV_PICTURE_TYPE_I,
54         .ref_pic_flag      = s->pict_type == AV_PICTURE_TYPE_I ||
55                              s->pict_type == AV_PICTURE_TYPE_P,
56
57         .CodecSpecific.mpeg2 = {
58             .ForwardRefIdx     = ff_nvdec_get_ref_idx(s->last_picture.f),
59             .BackwardRefIdx    = ff_nvdec_get_ref_idx(s->next_picture.f),
60
61             .picture_coding_type        = s->pict_type,
62             .full_pel_forward_vector    = s->full_pel[0],
63             .full_pel_backward_vector   = s->full_pel[1],
64             .f_code                     = { { s->mpeg_f_code[0][0],
65                                               s->mpeg_f_code[0][1] },
66                                             { s->mpeg_f_code[1][0],
67                                               s->mpeg_f_code[1][1] } },
68             .intra_dc_precision         = s->intra_dc_precision,
69             .frame_pred_frame_dct       = s->frame_pred_frame_dct,
70             .concealment_motion_vectors = s->concealment_motion_vectors,
71             .q_scale_type               = s->q_scale_type,
72             .intra_vlc_format           = s->intra_vlc_format,
73             .alternate_scan             = s->alternate_scan,
74             .top_field_first            = s->top_field_first,
75         }
76     };
77
78     for (i = 0; i < 64; ++i) {
79         ppc->QuantMatrixIntra[i] = s->intra_matrix[i];
80         ppc->QuantMatrixInter[i] = s->inter_matrix[i];
81     }
82
83     return 0;
84 }
85
86 static int nvdec_mpeg12_frame_params(AVCodecContext *avctx,
87                                   AVBufferRef *hw_frames_ctx)
88 {
89     // Each frame can at most have one P and one B reference
90     return ff_nvdec_frame_params(avctx, hw_frames_ctx, 2);
91 }
92
93 #if CONFIG_MPEG2_NVDEC_HWACCEL
94 const AVHWAccel ff_mpeg2_nvdec_hwaccel = {
95     .name                 = "mpeg2_nvdec",
96     .type                 = AVMEDIA_TYPE_VIDEO,
97     .id                   = AV_CODEC_ID_MPEG2VIDEO,
98     .pix_fmt              = AV_PIX_FMT_CUDA,
99     .start_frame          = nvdec_mpeg12_start_frame,
100     .end_frame            = ff_nvdec_simple_end_frame,
101     .decode_slice         = ff_nvdec_simple_decode_slice,
102     .frame_params         = nvdec_mpeg12_frame_params,
103     .init                 = ff_nvdec_decode_init,
104     .uninit               = ff_nvdec_decode_uninit,
105     .priv_data_size       = sizeof(NVDECContext),
106 };
107 #endif
108
109 #if CONFIG_MPEG1_NVDEC_HWACCEL
110 const AVHWAccel ff_mpeg1_nvdec_hwaccel = {
111     .name                 = "mpeg1_nvdec",
112     .type                 = AVMEDIA_TYPE_VIDEO,
113     .id                   = AV_CODEC_ID_MPEG1VIDEO,
114     .pix_fmt              = AV_PIX_FMT_CUDA,
115     .start_frame          = nvdec_mpeg12_start_frame,
116     .end_frame            = ff_nvdec_simple_end_frame,
117     .decode_slice         = ff_nvdec_simple_decode_slice,
118     .frame_params         = nvdec_mpeg12_frame_params,
119     .init                 = ff_nvdec_decode_init,
120     .uninit               = ff_nvdec_decode_uninit,
121     .priv_data_size       = sizeof(NVDECContext),
122 };
123 #endif