forked from KolibriOS/kolibrios
169 lines
7.4 KiB
C
169 lines
7.4 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 FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 "vaapi_internal.h"
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#include "internal.h"
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#include "h263.h"
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#include "mpeg4video.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 * const s = &ctx->m;
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FFVAContext * const vactx = ff_vaapi_get_context(avctx);
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VAPictureParameterBufferMPEG4 *pic_param;
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VAIQMatrixBufferMPEG4 *iq_matrix;
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int i;
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ff_dlog(avctx, "vaapi_mpeg4_start_frame()\n");
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vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG4);
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/* Fill in VAPictureParameterBufferMPEG4 */
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pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG4));
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if (!pic_param)
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return -1;
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pic_param->vop_width = s->width;
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pic_param->vop_height = s->height;
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pic_param->forward_reference_picture = VA_INVALID_ID;
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pic_param->backward_reference_picture = VA_INVALID_ID;
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pic_param->vol_fields.value = 0; /* reset all bits */
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pic_param->vol_fields.bits.short_video_header = avctx->codec->id == AV_CODEC_ID_H263;
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pic_param->vol_fields.bits.chroma_format = CHROMA_420;
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pic_param->vol_fields.bits.interlaced = !s->progressive_sequence;
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pic_param->vol_fields.bits.obmc_disable = 1;
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pic_param->vol_fields.bits.sprite_enable = ctx->vol_sprite_usage;
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pic_param->vol_fields.bits.sprite_warping_accuracy = s->sprite_warping_accuracy;
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pic_param->vol_fields.bits.quant_type = s->mpeg_quant;
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pic_param->vol_fields.bits.quarter_sample = s->quarter_sample;
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pic_param->vol_fields.bits.data_partitioned = s->data_partitioning;
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pic_param->vol_fields.bits.reversible_vlc = ctx->rvlc;
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pic_param->vol_fields.bits.resync_marker_disable = !ctx->resync_marker;
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pic_param->no_of_sprite_warping_points = ctx->num_sprite_warping_points;
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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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pic_param->quant_precision = s->quant_precision;
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pic_param->vop_fields.value = 0; /* reset all bits */
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pic_param->vop_fields.bits.vop_coding_type = s->pict_type - AV_PICTURE_TYPE_I;
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pic_param->vop_fields.bits.backward_reference_vop_coding_type = s->pict_type == AV_PICTURE_TYPE_B ? s->next_picture.f->pict_type - AV_PICTURE_TYPE_I : 0;
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pic_param->vop_fields.bits.vop_rounding_type = s->no_rounding;
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pic_param->vop_fields.bits.intra_dc_vlc_thr = mpeg4_get_intra_dc_vlc_thr(ctx);
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pic_param->vop_fields.bits.top_field_first = s->top_field_first;
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pic_param->vop_fields.bits.alternate_vertical_scan_flag = s->alternate_scan;
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pic_param->vop_fcode_forward = s->f_code;
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pic_param->vop_fcode_backward = s->b_code;
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pic_param->vop_time_increment_resolution = avctx->framerate.num;
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pic_param->num_macroblocks_in_gob = s->mb_width * H263_GOB_HEIGHT(s->height);
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pic_param->num_gobs_in_vop = (s->mb_width * s->mb_height) / pic_param->num_macroblocks_in_gob;
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pic_param->TRB = s->pb_time;
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pic_param->TRD = s->pp_time;
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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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/* Fill in VAIQMatrixBufferMPEG4 */
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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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iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG4));
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if (!iq_matrix)
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return -1;
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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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}
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return 0;
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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 * const s = avctx->priv_data;
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FFVAContext * const vactx = ff_vaapi_get_context(avctx);
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VASliceParameterBufferMPEG4 *slice_param;
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ff_dlog(avctx, "vaapi_mpeg4_decode_slice(): buffer %p, size %d\n", buffer, size);
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/* Fill in VASliceParameterBufferMPEG4 */
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slice_param = (VASliceParameterBufferMPEG4 *)ff_vaapi_alloc_slice(vactx, buffer, size);
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if (!slice_param)
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return -1;
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slice_param->macroblock_offset = get_bits_count(&s->gb) % 8;
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slice_param->macroblock_number = 0;
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slice_param->quant_scale = s->qscale;
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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 = ff_vaapi_mpeg_end_frame,
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.decode_slice = vaapi_mpeg4_decode_slice,
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.init = ff_vaapi_context_init,
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.uninit = ff_vaapi_context_fini,
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.priv_data_size = sizeof(FFVAContext),
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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 = ff_vaapi_mpeg_end_frame,
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.decode_slice = vaapi_mpeg4_decode_slice,
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.init = ff_vaapi_context_init,
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.uninit = ff_vaapi_context_fini,
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.priv_data_size = sizeof(FFVAContext),
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};
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#endif
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