mirror of https://git.ffmpeg.org/ffmpeg.git
226 lines
8.6 KiB
C
226 lines
8.6 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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.frame_params = &ff_vaapi_common_frame_params,
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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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.frame_params = &ff_vaapi_common_frame_params,
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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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