diff options
author | Philip Langdale <philipl@overt.org> | 2017-11-16 07:35:17 -0800 |
---|---|---|
committer | Philip Langdale <philipl@overt.org> | 2017-11-18 08:13:50 -0800 |
commit | 7c9f739d864c0ed8f1b433d6a7d9f674edda9cf5 (patch) | |
tree | 46a05dceb3641504c0a31cdd3ab687415bcbb1d8 /libavcodec/nvdec_mpeg12.c | |
parent | 5a0f6b099f3e8fcb95a80e3ffe52b3bf369efe24 (diff) |
avcodec: Implement mpeg2 nvdec hwaccel
This is mostly straight-forward. The weird part is that it should
just work for mpeg1, but I see corruption in my test cases, so I'm
going to try and fix that separately.
Diffstat (limited to 'libavcodec/nvdec_mpeg12.c')
-rw-r--r-- | libavcodec/nvdec_mpeg12.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/libavcodec/nvdec_mpeg12.c b/libavcodec/nvdec_mpeg12.c new file mode 100644 index 0000000000..127e843d85 --- /dev/null +++ b/libavcodec/nvdec_mpeg12.c @@ -0,0 +1,152 @@ +/* + * MPEG-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 "mpegvideo.h" +#include "nvdec.h" +#include "decode.h" + +static int get_ref_idx(AVFrame *frame) +{ + FrameDecodeData *fdd; + NVDECFrame *cf; + + if (!frame || !frame->private_ref) + return -1; + + fdd = (FrameDecodeData*)frame->private_ref->data; + cf = (NVDECFrame*)fdd->hwaccel_priv; + if (!cf) + return -1; + + return cf->idx; +} + +static int nvdec_mpeg12_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size) +{ + MpegEncContext *s = avctx->priv_data; + + NVDECContext *ctx = avctx->internal->hwaccel_priv_data; + CUVIDPICPARAMS *pp = &ctx->pic_params; + CUVIDMPEG2PICPARAMS *ppc = &pp->CodecSpecific.mpeg2; + 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, + + .CodecSpecific.mpeg2 = { + .ForwardRefIdx = get_ref_idx(s->last_picture.f), + .BackwardRefIdx = get_ref_idx(s->next_picture.f), + + .picture_coding_type = s->pict_type, + .full_pel_forward_vector = s->full_pel[0], + .full_pel_backward_vector = s->full_pel[1], + .f_code = { { s->mpeg_f_code[0][0], + s->mpeg_f_code[0][1] }, + { s->mpeg_f_code[1][0], + s->mpeg_f_code[1][1] } }, + .intra_dc_precision = s->intra_dc_precision, + .frame_pred_frame_dct = s->frame_pred_frame_dct, + .concealment_motion_vectors = s->concealment_motion_vectors, + .q_scale_type = s->q_scale_type, + .intra_vlc_format = s->intra_vlc_format, + .alternate_scan = s->alternate_scan, + .top_field_first = s->top_field_first, + } + }; + + for (i = 0; i < 64; ++i) { + ppc->QuantMatrixIntra[i] = s->intra_matrix[i]; + ppc->QuantMatrixInter[i] = s->inter_matrix[i]; + } + + return 0; +} + +static int nvdec_mpeg12_end_frame(AVCodecContext *avctx) +{ + NVDECContext *ctx = avctx->internal->hwaccel_priv_data; + int ret = ff_nvdec_end_frame(avctx); + ctx->bitstream = NULL; + return ret; +} + +static int nvdec_mpeg12_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size) +{ + NVDECContext *ctx = avctx->internal->hwaccel_priv_data; + void *tmp; + + tmp = av_fast_realloc(ctx->slice_offsets, &ctx->slice_offsets_allocated, + (ctx->nb_slices + 1) * sizeof(*ctx->slice_offsets)); + if (!tmp) + return AVERROR(ENOMEM); + ctx->slice_offsets = tmp; + + if (!ctx->bitstream) + ctx->bitstream = (uint8_t*)buffer; + + ctx->slice_offsets[ctx->nb_slices] = buffer - ctx->bitstream; + ctx->bitstream_len += size; + ctx->nb_slices++; + + return 0; +} + +static int nvdec_mpeg12_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); +} + +#if CONFIG_MPEG2_NVDEC_HWACCEL +AVHWAccel ff_mpeg2_nvdec_hwaccel = { + .name = "mpeg2_nvdec", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_MPEG2VIDEO, + .pix_fmt = AV_PIX_FMT_CUDA, + .start_frame = nvdec_mpeg12_start_frame, + .end_frame = nvdec_mpeg12_end_frame, + .decode_slice = nvdec_mpeg12_decode_slice, + .frame_params = nvdec_mpeg12_frame_params, + .init = ff_nvdec_decode_init, + .uninit = ff_nvdec_decode_uninit, + .priv_data_size = sizeof(NVDECContext), +}; +#endif |