/* * MPEG-2 HW decode acceleration through VA API * * Copyright (C) 2008-2009 Splitted-Desktop Systems * * 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 "hwconfig.h"#include "mpegutils.h"#include "mpegvideo.h"#include "internal.h"#include "vaapi_decode.h" /** Reconstruct bitstream f_code */static inline int mpeg2_get_f_code(const MpegEncContext *s){    return (s->mpeg_f_code[0][0] << 12) | (s->mpeg_f_code[0][1] << 8) |           (s->mpeg_f_code[1][0] <<  4) |  s->mpeg_f_code[1][1];} /** Determine frame start: first field for field picture or frame picture */static inline int mpeg2_get_is_frame_start(const MpegEncContext *s){    return s->first_field || s->picture_structure == PICT_FRAME;} static int vaapi_mpeg2_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size){    const MpegEncContext *s = avctx->priv_data;    VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;    VAPictureParameterBufferMPEG2 pic_param;    VAIQMatrixBufferMPEG2 iq_matrix;    int i, err;     pic->output_surface = ff_vaapi_get_surface_id(s->current_picture_ptr->f);     pic_param = (VAPictureParameterBufferMPEG2) {        .horizontal_size                 = s->width,        .vertical_size                   = s->height,        .forward_reference_picture       = VA_INVALID_ID,        .backward_reference_picture      = VA_INVALID_ID,        .picture_coding_type             = s->pict_type,        .f_code                          = mpeg2_get_f_code(s),        .picture_coding_extension.bits = {            .intra_dc_precision          = s->intra_dc_precision,            .picture_structure           = s->picture_structure,            .top_field_first             = s->top_field_first,            .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,            .repeat_first_field          = s->repeat_first_field,            .progressive_frame           = s->progressive_frame,            .is_first_field              = mpeg2_get_is_frame_start(s),        },    };     switch (s->pict_type) {    case AV_PICTURE_TYPE_B:        pic_param.backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);        // fall-through    case AV_PICTURE_TYPE_P:        pic_param.forward_reference_picture = ff_vaapi_get_surface_id(s->last_picture.f);        break;    }     err = ff_vaapi_decode_make_param_buffer(avctx, pic,                                            VAPictureParameterBufferType,                                            &pic_param, sizeof(pic_param));    if (err < 0)        goto fail;     iq_matrix.load_intra_quantiser_matrix              = 1;    iq_matrix.load_non_intra_quantiser_matrix          = 1;    iq_matrix.load_chroma_intra_quantiser_matrix       = 1;    iq_matrix.load_chroma_non_intra_quantiser_matrix   = 1;     for (i = 0; i < 64; i++) {        int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];        iq_matrix.intra_quantiser_matrix[i]            = s->intra_matrix[n];        iq_matrix.non_intra_quantiser_matrix[i]        = s->inter_matrix[n];        iq_matrix.chroma_intra_quantiser_matrix[i]     = s->chroma_intra_matrix[n];        iq_matrix.chroma_non_intra_quantiser_matrix[i] = s->chroma_inter_matrix[n];    }     err = ff_vaapi_decode_make_param_buffer(avctx, pic,                                            VAIQMatrixBufferType,                                            &iq_matrix, sizeof(iq_matrix));    if (err < 0)        goto fail;     return 0; fail:    ff_vaapi_decode_cancel(avctx, pic);    return err;} static int vaapi_mpeg2_end_frame(AVCodecContext *avctx){    MpegEncContext     *s   = avctx->priv_data;    VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;    int ret;     ret = ff_vaapi_decode_issue(avctx, pic);    if (ret < 0)        goto fail;     ff_mpeg_draw_horiz_band(s, 0, s->avctx->height); fail:    return ret;} static int vaapi_mpeg2_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size){    const MpegEncContext *s = avctx->priv_data;    VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;    VASliceParameterBufferMPEG2 slice_param;    GetBitContext gb;    uint32_t quantiser_scale_code, intra_slice_flag, macroblock_offset;    int err;     /* Determine macroblock_offset */    init_get_bits(&gb, buffer, 8 * size);    if (get_bits_long(&gb, 32) >> 8 != 1) /* start code */        return AVERROR_INVALIDDATA;    quantiser_scale_code = get_bits(&gb, 5);    intra_slice_flag = get_bits1(&gb);    if (intra_slice_flag) {        skip_bits(&gb, 8);        if (skip_1stop_8data_bits(&gb) < 0)            return AVERROR_INVALIDDATA;    }    macroblock_offset = get_bits_count(&gb);     slice_param = (VASliceParameterBufferMPEG2) {        .slice_data_size            = size,        .slice_data_offset          = 0,        .slice_data_flag            = VA_SLICE_DATA_FLAG_ALL,        .macroblock_offset          = macroblock_offset,        .slice_horizontal_position  = s->mb_x,        .slice_vertical_position    = s->mb_y >> (s->picture_structure != PICT_FRAME),        .quantiser_scale_code       = quantiser_scale_code,        .intra_slice_flag           = intra_slice_flag,    };     err = ff_vaapi_decode_make_slice_buffer(avctx, pic,                                            &slice_param, sizeof(slice_param),                                            buffer, size);    if (err < 0) {        ff_vaapi_decode_cancel(avctx, pic);        return err;    }     return 0;} const AVHWAccel ff_mpeg2_vaapi_hwaccel = {    .name                 = "mpeg2_vaapi",    .type                 = AVMEDIA_TYPE_VIDEO,    .id                   = AV_CODEC_ID_MPEG2VIDEO,    .pix_fmt              = AV_PIX_FMT_VAAPI,    .start_frame          = &vaapi_mpeg2_start_frame,    .end_frame            = &vaapi_mpeg2_end_frame,    .decode_slice         = &vaapi_mpeg2_decode_slice,    .frame_priv_data_size = sizeof(VAAPIDecodePicture),    .init                 = &ff_vaapi_decode_init,    .uninit               = &ff_vaapi_decode_uninit,    .frame_params         = &ff_vaapi_common_frame_params,    .priv_data_size       = sizeof(VAAPIDecodeContext),    .caps_internal        = HWACCEL_CAP_ASYNC_SAFE,};