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https://github.com/FFmpeg/FFmpeg.git
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d4a91e6534
Certain hardware decoding APIs are not guaranteed to be thread-safe, so having the user access decoded hardware surfaces while the decoder is running in another thread can cause failures (this is mainly known to happen with DXVA2). For such hwaccels, only allow the decoding thread to run while the user is inside a lavc decode call (avcodec_send_packet/receive_frame).
224 lines
8.5 KiB
C
224 lines
8.5 KiB
C
/*
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* MPEG-4 / H.263 HW decode acceleration through VA API
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*
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* Copyright (C) 2008-2009 Splitted-Desktop Systems
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 "h263.h"
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#include "hwaccel.h"
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#include "internal.h"
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#include "mpeg4video.h"
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#include "mpegvideo.h"
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#include "vaapi_decode.h"
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/** Reconstruct bitstream intra_dc_vlc_thr */
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static int mpeg4_get_intra_dc_vlc_thr(Mpeg4DecContext *s)
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{
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switch (s->intra_dc_threshold) {
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case 99: return 0;
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case 13: return 1;
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case 15: return 2;
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case 17: return 3;
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case 19: return 4;
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case 21: return 5;
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case 23: return 6;
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case 0: return 7;
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}
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return 0;
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}
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static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
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{
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Mpeg4DecContext *ctx = avctx->priv_data;
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MpegEncContext *s = &ctx->m;
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VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
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VAPictureParameterBufferMPEG4 pic_param;
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int i, err;
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pic->output_surface = ff_vaapi_get_surface_id(s->current_picture_ptr->f);
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pic_param = (VAPictureParameterBufferMPEG4) {
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.vop_width = s->width,
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.vop_height = s->height,
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.forward_reference_picture = VA_INVALID_ID,
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.backward_reference_picture = VA_INVALID_ID,
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.vol_fields.bits = {
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.short_video_header = avctx->codec->id == AV_CODEC_ID_H263,
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.chroma_format = CHROMA_420,
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.interlaced = !s->progressive_sequence,
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.obmc_disable = 1,
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.sprite_enable = ctx->vol_sprite_usage,
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.sprite_warping_accuracy = s->sprite_warping_accuracy,
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.quant_type = s->mpeg_quant,
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.quarter_sample = s->quarter_sample,
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.data_partitioned = s->data_partitioning,
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.reversible_vlc = ctx->rvlc,
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.resync_marker_disable = !ctx->resync_marker,
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},
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.no_of_sprite_warping_points = ctx->num_sprite_warping_points,
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.quant_precision = s->quant_precision,
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.vop_fields.bits = {
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.vop_coding_type = s->pict_type - AV_PICTURE_TYPE_I,
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.backward_reference_vop_coding_type =
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s->pict_type == AV_PICTURE_TYPE_B ? s->next_picture.f->pict_type - AV_PICTURE_TYPE_I : 0,
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.vop_rounding_type = s->no_rounding,
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.intra_dc_vlc_thr = mpeg4_get_intra_dc_vlc_thr(ctx),
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.top_field_first = s->top_field_first,
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.alternate_vertical_scan_flag = s->alternate_scan,
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},
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.vop_fcode_forward = s->f_code,
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.vop_fcode_backward = s->b_code,
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.vop_time_increment_resolution = avctx->framerate.num,
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.num_macroblocks_in_gob = s->mb_width * H263_GOB_HEIGHT(s->height),
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.num_gobs_in_vop =
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(s->mb_width * s->mb_height) / (s->mb_width * H263_GOB_HEIGHT(s->height)),
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.TRB = s->pb_time,
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.TRD = s->pp_time,
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};
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for (i = 0; i < ctx->num_sprite_warping_points && i < 3; i++) {
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pic_param.sprite_trajectory_du[i] = ctx->sprite_traj[i][0];
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pic_param.sprite_trajectory_dv[i] = ctx->sprite_traj[i][1];
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}
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if (s->pict_type == AV_PICTURE_TYPE_B)
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pic_param.backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
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if (s->pict_type != AV_PICTURE_TYPE_I)
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pic_param.forward_reference_picture = ff_vaapi_get_surface_id(s->last_picture.f);
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err = ff_vaapi_decode_make_param_buffer(avctx, pic,
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VAPictureParameterBufferType,
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&pic_param, sizeof(pic_param));
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if (err < 0)
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goto fail;
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/* Only the first inverse quantisation method uses the weighting matrices */
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if (pic_param.vol_fields.bits.quant_type) {
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VAIQMatrixBufferMPEG4 iq_matrix;
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iq_matrix.load_intra_quant_mat = 1;
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iq_matrix.load_non_intra_quant_mat = 1;
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for (i = 0; i < 64; i++) {
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int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
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iq_matrix.intra_quant_mat[i] = s->intra_matrix[n];
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iq_matrix.non_intra_quant_mat[i] = s->inter_matrix[n];
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}
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err = ff_vaapi_decode_make_param_buffer(avctx, pic,
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VAIQMatrixBufferType,
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&iq_matrix, sizeof(iq_matrix));
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if (err < 0)
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goto fail;
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}
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return 0;
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fail:
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ff_vaapi_decode_cancel(avctx, pic);
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return err;
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}
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static int vaapi_mpeg4_end_frame(AVCodecContext *avctx)
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{
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MpegEncContext *s = avctx->priv_data;
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VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
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int ret;
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ret = ff_vaapi_decode_issue(avctx, pic);
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if (ret < 0)
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goto fail;
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ff_mpeg_draw_horiz_band(s, 0, s->avctx->height);
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fail:
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return ret;
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}
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static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
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{
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MpegEncContext *s = avctx->priv_data;
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VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
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VASliceParameterBufferMPEG4 slice_param;
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int err;
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/* video_plane_with_short_video_header() contains all GOBs
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* in-order, and this is what VA API (Intel backend) expects: only
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* a single slice param. So fake macroblock_number for Libav so
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* that we don't call vaapi_mpeg4_decode_slice() again
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*/
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if (avctx->codec->id == AV_CODEC_ID_H263)
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size = s->gb.buffer_end - buffer;
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slice_param = (VASliceParameterBufferMPEG4) {
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.slice_data_size = size,
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.slice_data_offset = 0,
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.slice_data_flag = VA_SLICE_DATA_FLAG_ALL,
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.macroblock_offset = get_bits_count(&s->gb) % 8,
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.macroblock_number = s->mb_y * s->mb_width + s->mb_x,
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.quant_scale = s->qscale,
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};
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if (avctx->codec->id == AV_CODEC_ID_H263)
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s->mb_y = s->mb_height;
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err = ff_vaapi_decode_make_slice_buffer(avctx, pic,
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&slice_param, sizeof(slice_param),
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buffer, size);
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if (err < 0) {
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ff_vaapi_decode_cancel(avctx, pic);
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return err;
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}
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return 0;
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}
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#if CONFIG_MPEG4_VAAPI_HWACCEL
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AVHWAccel ff_mpeg4_vaapi_hwaccel = {
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.name = "mpeg4_vaapi",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_MPEG4,
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.pix_fmt = AV_PIX_FMT_VAAPI,
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.start_frame = &vaapi_mpeg4_start_frame,
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.end_frame = &vaapi_mpeg4_end_frame,
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.decode_slice = &vaapi_mpeg4_decode_slice,
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.frame_priv_data_size = sizeof(VAAPIDecodePicture),
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.init = &ff_vaapi_decode_init,
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.uninit = &ff_vaapi_decode_uninit,
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.priv_data_size = sizeof(VAAPIDecodeContext),
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.caps_internal = HWACCEL_CAP_ASYNC_SAFE,
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};
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#endif
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#if CONFIG_H263_VAAPI_HWACCEL
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AVHWAccel ff_h263_vaapi_hwaccel = {
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.name = "h263_vaapi",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_H263,
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.pix_fmt = AV_PIX_FMT_VAAPI,
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.start_frame = &vaapi_mpeg4_start_frame,
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.end_frame = &vaapi_mpeg4_end_frame,
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.decode_slice = &vaapi_mpeg4_decode_slice,
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.frame_priv_data_size = sizeof(VAAPIDecodePicture),
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.init = &ff_vaapi_decode_init,
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.uninit = &ff_vaapi_decode_uninit,
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.priv_data_size = sizeof(VAAPIDecodeContext),
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.caps_internal = HWACCEL_CAP_ASYNC_SAFE,
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};
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#endif
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