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144 lines
6.3 KiB
144 lines
6.3 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 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 "dsputil.h" |
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/** Reconstruct bitstream f_code */ |
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static inline int mpeg2_get_f_code(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(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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struct MpegEncContext * const s = avctx->priv_data; |
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struct vaapi_context * const vactx = avctx->hwaccel_context; |
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VAPictureParameterBufferMPEG2 *pic_param; |
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VAIQMatrixBufferMPEG2 *iq_matrix; |
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int i; |
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av_dlog(avctx, "vaapi_mpeg2_start_frame()\n"); |
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vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG2); |
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/* Fill in VAPictureParameterBufferMPEG2 */ |
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pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG2)); |
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if (!pic_param) |
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return -1; |
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pic_param->horizontal_size = s->width; |
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pic_param->vertical_size = 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->picture_coding_type = s->pict_type; |
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pic_param->f_code = mpeg2_get_f_code(s); |
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pic_param->picture_coding_extension.value = 0; /* reset all bits */ |
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pic_param->picture_coding_extension.bits.intra_dc_precision = s->intra_dc_precision; |
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pic_param->picture_coding_extension.bits.picture_structure = s->picture_structure; |
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pic_param->picture_coding_extension.bits.top_field_first = s->top_field_first; |
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pic_param->picture_coding_extension.bits.frame_pred_frame_dct = s->frame_pred_frame_dct; |
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pic_param->picture_coding_extension.bits.concealment_motion_vectors = s->concealment_motion_vectors; |
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pic_param->picture_coding_extension.bits.q_scale_type = s->q_scale_type; |
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pic_param->picture_coding_extension.bits.intra_vlc_format = s->intra_vlc_format; |
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pic_param->picture_coding_extension.bits.alternate_scan = s->alternate_scan; |
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pic_param->picture_coding_extension.bits.repeat_first_field = s->repeat_first_field; |
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pic_param->picture_coding_extension.bits.progressive_frame = s->progressive_frame; |
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pic_param->picture_coding_extension.bits.is_first_field = mpeg2_get_is_frame_start(s); |
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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); |
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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); |
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break; |
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} |
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/* Fill in VAIQMatrixBufferMPEG2 */ |
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iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG2)); |
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if (!iq_matrix) |
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return -1; |
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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->dsp.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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return 0; |
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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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MpegEncContext * const s = avctx->priv_data; |
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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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av_dlog(avctx, "vaapi_mpeg2_decode_slice(): buffer %p, size %d\n", buffer, size); |
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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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/* Fill in VASliceParameterBufferMPEG2 */ |
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slice_param = (VASliceParameterBufferMPEG2 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size); |
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if (!slice_param) |
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return -1; |
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slice_param->macroblock_offset = macroblock_offset; |
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slice_param->slice_horizontal_position = s->mb_x; |
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slice_param->slice_vertical_position = s->mb_y >> (s->picture_structure != PICT_FRAME); |
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slice_param->quantiser_scale_code = quantiser_scale_code; |
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slice_param->intra_slice_flag = intra_slice_flag; |
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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_VLD, |
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.start_frame = vaapi_mpeg2_start_frame, |
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.end_frame = ff_vaapi_mpeg_end_frame, |
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.decode_slice = vaapi_mpeg2_decode_slice, |
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};
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