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190 lines
7.1 KiB
190 lines
7.1 KiB
/* |
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* MPEG-2 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 "hwaccel.h" |
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#include "mpegutils.h" |
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#include "mpegvideo.h" |
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#include "internal.h" |
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#include "vaapi_decode.h" |
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/** Reconstruct bitstream f_code */ |
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static inline int mpeg2_get_f_code(const MpegEncContext *s) |
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{ |
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return (s->mpeg_f_code[0][0] << 12) | (s->mpeg_f_code[0][1] << 8) | |
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(s->mpeg_f_code[1][0] << 4) | s->mpeg_f_code[1][1]; |
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} |
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/** Determine frame start: first field for field picture or frame picture */ |
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static inline int mpeg2_get_is_frame_start(const MpegEncContext *s) |
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{ |
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return s->first_field || s->picture_structure == PICT_FRAME; |
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} |
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static int vaapi_mpeg2_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size) |
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{ |
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const MpegEncContext *s = avctx->priv_data; |
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VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private; |
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VAPictureParameterBufferMPEG2 pic_param; |
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VAIQMatrixBufferMPEG2 iq_matrix; |
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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 = (VAPictureParameterBufferMPEG2) { |
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.horizontal_size = s->width, |
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.vertical_size = 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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.picture_coding_type = s->pict_type, |
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.f_code = mpeg2_get_f_code(s), |
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.picture_coding_extension.bits = { |
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.intra_dc_precision = s->intra_dc_precision, |
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.picture_structure = s->picture_structure, |
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.top_field_first = s->top_field_first, |
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.frame_pred_frame_dct = s->frame_pred_frame_dct, |
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.concealment_motion_vectors = s->concealment_motion_vectors, |
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.q_scale_type = s->q_scale_type, |
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.intra_vlc_format = s->intra_vlc_format, |
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.alternate_scan = s->alternate_scan, |
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.repeat_first_field = s->repeat_first_field, |
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.progressive_frame = s->progressive_frame, |
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.is_first_field = mpeg2_get_is_frame_start(s), |
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}, |
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}; |
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switch (s->pict_type) { |
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case 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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// fall-through |
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case AV_PICTURE_TYPE_P: |
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pic_param.forward_reference_picture = ff_vaapi_get_surface_id(s->last_picture.f); |
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break; |
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} |
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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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iq_matrix.load_intra_quantiser_matrix = 1; |
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iq_matrix.load_non_intra_quantiser_matrix = 1; |
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iq_matrix.load_chroma_intra_quantiser_matrix = 1; |
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iq_matrix.load_chroma_non_intra_quantiser_matrix = 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_quantiser_matrix[i] = s->intra_matrix[n]; |
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iq_matrix.non_intra_quantiser_matrix[i] = s->inter_matrix[n]; |
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iq_matrix.chroma_intra_quantiser_matrix[i] = s->chroma_intra_matrix[n]; |
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iq_matrix.chroma_non_intra_quantiser_matrix[i] = s->chroma_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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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_mpeg2_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_mpeg2_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size) |
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{ |
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const MpegEncContext *s = avctx->priv_data; |
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VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private; |
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VASliceParameterBufferMPEG2 slice_param; |
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GetBitContext gb; |
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uint32_t quantiser_scale_code, intra_slice_flag, macroblock_offset; |
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int err; |
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/* Determine macroblock_offset */ |
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init_get_bits(&gb, buffer, 8 * size); |
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if (get_bits_long(&gb, 32) >> 8 != 1) /* start code */ |
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return AVERROR_INVALIDDATA; |
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quantiser_scale_code = get_bits(&gb, 5); |
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intra_slice_flag = get_bits1(&gb); |
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if (intra_slice_flag) { |
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skip_bits(&gb, 8); |
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while (get_bits1(&gb) != 0) |
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skip_bits(&gb, 8); |
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} |
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macroblock_offset = get_bits_count(&gb); |
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slice_param = (VASliceParameterBufferMPEG2) { |
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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 = macroblock_offset, |
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.slice_horizontal_position = s->mb_x, |
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.slice_vertical_position = s->mb_y >> (s->picture_structure != PICT_FRAME), |
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.quantiser_scale_code = quantiser_scale_code, |
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.intra_slice_flag = intra_slice_flag, |
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}; |
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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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AVHWAccel ff_mpeg2_vaapi_hwaccel = { |
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.name = "mpeg2_vaapi", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_MPEG2VIDEO, |
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.pix_fmt = AV_PIX_FMT_VAAPI, |
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.start_frame = &vaapi_mpeg2_start_frame, |
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.end_frame = &vaapi_mpeg2_end_frame, |
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.decode_slice = &vaapi_mpeg2_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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