diff options
Diffstat (limited to 'libavcodec/nvdec_mpeg4.c')
| -rw-r--r-- | libavcodec/nvdec_mpeg4.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/libavcodec/nvdec_mpeg4.c b/libavcodec/nvdec_mpeg4.c new file mode 100644 index 0000000..739b049 --- /dev/null +++ b/libavcodec/nvdec_mpeg4.c @@ -0,0 +1,121 @@ +/* + * MPEG-4 Part 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 "mpeg4video.h" +#include "nvdec.h" +#include "decode.h" + +static int nvdec_mpeg4_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size) +{ + Mpeg4DecContext *m = avctx->priv_data; + MpegEncContext *s = &m->m; + + NVDECContext *ctx = avctx->internal->hwaccel_priv_data; + CUVIDPICPARAMS *pp = &ctx->pic_params; + CUVIDMPEG4PICPARAMS *ppc = &pp->CodecSpecific.mpeg4; + 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 || + s->pict_type == AV_PICTURE_TYPE_S, + + .CodecSpecific.mpeg4 = { + .ForwardRefIdx = ff_nvdec_get_ref_idx(s->last_picture.f), + .BackwardRefIdx = ff_nvdec_get_ref_idx(s->next_picture.f), + + .video_object_layer_width = s->width, + .video_object_layer_height = s->height, + .vop_time_increment_bitcount = m->time_increment_bits, + .top_field_first = s->top_field_first, + .resync_marker_disable = !m->resync_marker, + .quant_type = s->mpeg_quant, + .quarter_sample = s->quarter_sample, + .short_video_header = avctx->codec->id == AV_CODEC_ID_H263, + .divx_flags = s->divx_packed ? 5 : 0, + + .vop_coding_type = s->pict_type - AV_PICTURE_TYPE_I, + .vop_coded = 1, + .vop_rounding_type = s->no_rounding, + .alternate_vertical_scan_flag = s->alternate_scan, + .interlaced = !s->progressive_sequence, + .vop_fcode_forward = s->f_code, + .vop_fcode_backward = s->b_code, + .trd = { s->pp_time, s->pp_field_time >> 1 }, + .trb = { s->pb_time, s->pb_field_time >> 1 }, + + .gmc_enabled = s->pict_type == AV_PICTURE_TYPE_S && + m->vol_sprite_usage == GMC_SPRITE, + } + }; + + for (i = 0; i < 64; ++i) { + ppc->QuantMatrixIntra[i] = s->intra_matrix[i]; + ppc->QuantMatrixInter[i] = s->inter_matrix[i]; + } + + // We need to pass the full frame buffer and not just the slice + return ff_nvdec_simple_decode_slice(avctx, buffer, size); +} + +static int nvdec_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size) +{ + return 0; +} + +static int nvdec_mpeg4_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, 0); +} + +const AVHWAccel ff_mpeg4_nvdec_hwaccel = { + .name = "mpeg4_nvdec", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_MPEG4, + .pix_fmt = AV_PIX_FMT_CUDA, + .start_frame = nvdec_mpeg4_start_frame, + .end_frame = ff_nvdec_simple_end_frame, + .decode_slice = nvdec_mpeg4_decode_slice, + .frame_params = nvdec_mpeg4_frame_params, + .init = ff_nvdec_decode_init, + .uninit = ff_nvdec_decode_uninit, + .priv_data_size = sizeof(NVDECContext), +}; |
