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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6148 | serge | 1 | /* |
| 2 | * MPEG-2 HW decode acceleration through VA API |
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| 3 | * |
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| 4 | * Copyright (C) 2008-2009 Splitted-Desktop Systems |
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| 5 | * |
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| 6 | * This file is part of FFmpeg. |
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| 7 | * |
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| 8 | * FFmpeg is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU Lesser General Public |
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| 10 | * License as published by the Free Software Foundation; either |
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| 11 | * version 2.1 of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * FFmpeg is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | * Lesser General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU Lesser General Public |
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| 19 | * License along with FFmpeg; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 21 | */ |
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| 22 | |||
| 23 | #include "vaapi_internal.h" |
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| 24 | |||
| 25 | /** Reconstruct bitstream f_code */ |
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| 26 | static inline int mpeg2_get_f_code(MpegEncContext *s) |
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| 27 | { |
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| 28 | return (s->mpeg_f_code[0][0] << 12) | (s->mpeg_f_code[0][1] << 8) | |
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| 29 | (s->mpeg_f_code[1][0] << 4) | s->mpeg_f_code[1][1]; |
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| 30 | } |
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| 31 | |||
| 32 | /** Determine frame start: first field for field picture or frame picture */ |
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| 33 | static inline int mpeg2_get_is_frame_start(MpegEncContext *s) |
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| 34 | { |
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| 35 | return s->first_field || s->picture_structure == PICT_FRAME; |
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| 36 | } |
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| 37 | |||
| 38 | static int vaapi_mpeg2_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size) |
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| 39 | { |
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| 40 | struct MpegEncContext * const s = avctx->priv_data; |
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| 41 | struct vaapi_context * const vactx = avctx->hwaccel_context; |
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| 42 | VAPictureParameterBufferMPEG2 *pic_param; |
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| 43 | VAIQMatrixBufferMPEG2 *iq_matrix; |
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| 44 | int i; |
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| 45 | |||
| 46 | av_dlog(avctx, "vaapi_mpeg2_start_frame()\n"); |
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| 47 | |||
| 48 | vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG2); |
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| 49 | |||
| 50 | /* Fill in VAPictureParameterBufferMPEG2 */ |
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| 51 | pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG2)); |
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| 52 | if (!pic_param) |
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| 53 | return -1; |
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| 54 | pic_param->horizontal_size = s->width; |
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| 55 | pic_param->vertical_size = s->height; |
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| 56 | pic_param->forward_reference_picture = VA_INVALID_ID; |
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| 57 | pic_param->backward_reference_picture = VA_INVALID_ID; |
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| 58 | pic_param->picture_coding_type = s->pict_type; |
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| 59 | pic_param->f_code = mpeg2_get_f_code(s); |
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| 60 | pic_param->picture_coding_extension.value = 0; /* reset all bits */ |
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| 61 | pic_param->picture_coding_extension.bits.intra_dc_precision = s->intra_dc_precision; |
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| 62 | pic_param->picture_coding_extension.bits.picture_structure = s->picture_structure; |
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| 63 | pic_param->picture_coding_extension.bits.top_field_first = s->top_field_first; |
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| 64 | pic_param->picture_coding_extension.bits.frame_pred_frame_dct = s->frame_pred_frame_dct; |
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| 65 | pic_param->picture_coding_extension.bits.concealment_motion_vectors = s->concealment_motion_vectors; |
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| 66 | pic_param->picture_coding_extension.bits.q_scale_type = s->q_scale_type; |
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| 67 | pic_param->picture_coding_extension.bits.intra_vlc_format = s->intra_vlc_format; |
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| 68 | pic_param->picture_coding_extension.bits.alternate_scan = s->alternate_scan; |
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| 69 | pic_param->picture_coding_extension.bits.repeat_first_field = s->repeat_first_field; |
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| 70 | pic_param->picture_coding_extension.bits.progressive_frame = s->progressive_frame; |
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| 71 | pic_param->picture_coding_extension.bits.is_first_field = mpeg2_get_is_frame_start(s); |
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| 72 | |||
| 73 | switch (s->pict_type) { |
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| 74 | case AV_PICTURE_TYPE_B: |
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| 75 | pic_param->backward_reference_picture = ff_vaapi_get_surface_id(&s->next_picture); |
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| 76 | // fall-through |
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| 77 | case AV_PICTURE_TYPE_P: |
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| 78 | pic_param->forward_reference_picture = ff_vaapi_get_surface_id(&s->last_picture); |
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| 79 | break; |
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| 80 | } |
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| 81 | |||
| 82 | /* Fill in VAIQMatrixBufferMPEG2 */ |
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| 83 | iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG2)); |
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| 84 | if (!iq_matrix) |
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| 85 | return -1; |
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| 86 | iq_matrix->load_intra_quantiser_matrix = 1; |
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| 87 | iq_matrix->load_non_intra_quantiser_matrix = 1; |
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| 88 | iq_matrix->load_chroma_intra_quantiser_matrix = 1; |
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| 89 | iq_matrix->load_chroma_non_intra_quantiser_matrix = 1; |
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| 90 | |||
| 91 | for (i = 0; i < 64; i++) { |
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| 92 | int n = s->dsp.idct_permutation[ff_zigzag_direct[i]]; |
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| 93 | iq_matrix->intra_quantiser_matrix[i] = s->intra_matrix[n]; |
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| 94 | iq_matrix->non_intra_quantiser_matrix[i] = s->inter_matrix[n]; |
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| 95 | iq_matrix->chroma_intra_quantiser_matrix[i] = s->chroma_intra_matrix[n]; |
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| 96 | iq_matrix->chroma_non_intra_quantiser_matrix[i] = s->chroma_inter_matrix[n]; |
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| 97 | } |
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| 98 | return 0; |
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| 99 | } |
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| 100 | |||
| 101 | static int vaapi_mpeg2_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size) |
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| 102 | { |
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| 103 | MpegEncContext * const s = avctx->priv_data; |
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| 104 | VASliceParameterBufferMPEG2 *slice_param; |
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| 105 | GetBitContext gb; |
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| 106 | uint32_t quantiser_scale_code, intra_slice_flag, macroblock_offset; |
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| 107 | |||
| 108 | av_dlog(avctx, "vaapi_mpeg2_decode_slice(): buffer %p, size %d\n", buffer, size); |
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| 109 | |||
| 110 | /* Determine macroblock_offset */ |
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| 111 | init_get_bits(&gb, buffer, 8 * size); |
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| 112 | if (get_bits_long(&gb, 32) >> 8 != 1) /* start code */ |
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| 113 | return AVERROR_INVALIDDATA; |
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| 114 | quantiser_scale_code = get_bits(&gb, 5); |
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| 115 | intra_slice_flag = get_bits1(&gb); |
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| 116 | if (intra_slice_flag) { |
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| 117 | skip_bits(&gb, 8); |
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| 118 | while (get_bits1(&gb) != 0) |
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| 119 | skip_bits(&gb, 8); |
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| 120 | } |
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| 121 | macroblock_offset = get_bits_count(&gb); |
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| 122 | |||
| 123 | /* Fill in VASliceParameterBufferMPEG2 */ |
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| 124 | slice_param = (VASliceParameterBufferMPEG2 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size); |
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| 125 | if (!slice_param) |
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| 126 | return -1; |
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| 127 | slice_param->macroblock_offset = macroblock_offset; |
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| 128 | slice_param->slice_horizontal_position = s->mb_x; |
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| 129 | slice_param->slice_vertical_position = s->mb_y >> (s->picture_structure != PICT_FRAME); |
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| 130 | slice_param->quantiser_scale_code = quantiser_scale_code; |
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| 131 | slice_param->intra_slice_flag = intra_slice_flag; |
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| 132 | return 0; |
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| 133 | } |
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| 134 | |||
| 135 | AVHWAccel ff_mpeg2_vaapi_hwaccel = { |
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| 136 | .name = "mpeg2_vaapi", |
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| 137 | .type = AVMEDIA_TYPE_VIDEO, |
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| 138 | .id = AV_CODEC_ID_MPEG2VIDEO, |
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| 139 | .pix_fmt = AV_PIX_FMT_VAAPI_VLD, |
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| 140 | .start_frame = vaapi_mpeg2_start_frame, |
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| 141 | .end_frame = ff_vaapi_mpeg_end_frame, |
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| 142 | .decode_slice = vaapi_mpeg2_decode_slice, |
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| 143 | }; |