| 1 | /* |
| 2 | * MPEG-2 HW acceleration. |
| 3 | * |
| 4 | * copyright (c) 2010 Laurent Aimar |
| 5 | * |
| 6 | * This file is part of FFmpeg. |
| 7 | * |
| 8 | * FFmpeg is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU Lesser General Public |
| 10 | * License as published by the Free Software Foundation; either |
| 11 | * version 2.1 of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * FFmpeg is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * Lesser General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Lesser General Public |
| 19 | * License along with FFmpeg; if not, write to the Free Software |
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 21 | */ |
| 22 | |
| 23 | #include "libavutil/log.h" |
| 24 | #include "dxva2_internal.h" |
| 25 | #include "mpegutils.h" |
| 26 | |
| 27 | #define MAX_SLICES 1024 |
| 28 | struct dxva2_picture_context { |
| 29 | DXVA_PictureParameters pp; |
| 30 | DXVA_QmatrixData qm; |
| 31 | unsigned slice_count; |
| 32 | DXVA_SliceInfo slice[MAX_SLICES]; |
| 33 | |
| 34 | const uint8_t *bitstream; |
| 35 | unsigned bitstream_size; |
| 36 | }; |
| 37 | |
| 38 | static void fill_picture_parameters(AVCodecContext *avctx, |
| 39 | struct dxva_context *ctx, |
| 40 | const struct MpegEncContext *s, |
| 41 | DXVA_PictureParameters *pp) |
| 42 | { |
| 43 | const Picture *current_picture = s->current_picture_ptr; |
| 44 | int is_field = s->picture_structure != PICT_FRAME; |
| 45 | |
| 46 | memset(pp, 0, sizeof(*pp)); |
| 47 | pp->wDecodedPictureIndex = ff_dxva2_get_surface_index(ctx, current_picture->f); |
| 48 | pp->wDeblockedPictureIndex = 0; |
| 49 | if (s->pict_type != AV_PICTURE_TYPE_I) |
| 50 | pp->wForwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, s->last_picture.f); |
| 51 | else |
| 52 | pp->wForwardRefPictureIndex = 0xffff; |
| 53 | if (s->pict_type == AV_PICTURE_TYPE_B) |
| 54 | pp->wBackwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, s->next_picture.f); |
| 55 | else |
| 56 | pp->wBackwardRefPictureIndex = 0xffff; |
| 57 | pp->wPicWidthInMBminus1 = s->mb_width - 1; |
| 58 | pp->wPicHeightInMBminus1 = (s->mb_height >> is_field) - 1; |
| 59 | pp->bMacroblockWidthMinus1 = 15; |
| 60 | pp->bMacroblockHeightMinus1 = 15; |
| 61 | pp->bBlockWidthMinus1 = 7; |
| 62 | pp->bBlockHeightMinus1 = 7; |
| 63 | pp->bBPPminus1 = 7; |
| 64 | pp->bPicStructure = s->picture_structure; |
| 65 | pp->bSecondField = is_field && !s->first_field; |
| 66 | pp->bPicIntra = s->pict_type == AV_PICTURE_TYPE_I; |
| 67 | pp->bPicBackwardPrediction = s->pict_type == AV_PICTURE_TYPE_B; |
| 68 | pp->bBidirectionalAveragingMode = 0; |
| 69 | pp->bMVprecisionAndChromaRelation= 0; /* FIXME */ |
| 70 | pp->bChromaFormat = s->chroma_format; |
| 71 | pp->bPicScanFixed = 1; |
| 72 | pp->bPicScanMethod = s->alternate_scan ? 1 : 0; |
| 73 | pp->bPicReadbackRequests = 0; |
| 74 | pp->bRcontrol = 0; |
| 75 | pp->bPicSpatialResid8 = 0; |
| 76 | pp->bPicOverflowBlocks = 0; |
| 77 | pp->bPicExtrapolation = 0; |
| 78 | pp->bPicDeblocked = 0; |
| 79 | pp->bPicDeblockConfined = 0; |
| 80 | pp->bPic4MVallowed = 0; |
| 81 | pp->bPicOBMC = 0; |
| 82 | pp->bPicBinPB = 0; |
| 83 | pp->bMV_RPS = 0; |
| 84 | pp->bReservedBits = 0; |
| 85 | pp->wBitstreamFcodes = (s->mpeg_f_code[0][0] << 12) | |
| 86 | (s->mpeg_f_code[0][1] << 8) | |
| 87 | (s->mpeg_f_code[1][0] << 4) | |
| 88 | (s->mpeg_f_code[1][1] ); |
| 89 | pp->wBitstreamPCEelements = (s->intra_dc_precision << 14) | |
| 90 | (s->picture_structure << 12) | |
| 91 | (s->top_field_first << 11) | |
| 92 | (s->frame_pred_frame_dct << 10) | |
| 93 | (s->concealment_motion_vectors << 9) | |
| 94 | (s->q_scale_type << 8) | |
| 95 | (s->intra_vlc_format << 7) | |
| 96 | (s->alternate_scan << 6) | |
| 97 | (s->repeat_first_field << 5) | |
| 98 | (s->chroma_420_type << 4) | |
| 99 | (s->progressive_frame << 3); |
| 100 | pp->bBitstreamConcealmentNeed = 0; |
| 101 | pp->bBitstreamConcealmentMethod = 0; |
| 102 | } |
| 103 | |
| 104 | static void fill_quantization_matrices(AVCodecContext *avctx, |
| 105 | struct dxva_context *ctx, |
| 106 | const struct MpegEncContext *s, |
| 107 | DXVA_QmatrixData *qm) |
| 108 | { |
| 109 | int i; |
| 110 | for (i = 0; i < 4; i++) |
| 111 | qm->bNewQmatrix[i] = 1; |
| 112 | for (i = 0; i < 64; i++) { |
| 113 | int n = s->idsp.idct_permutation[ff_zigzag_direct[i]]; |
| 114 | qm->Qmatrix[0][i] = s->intra_matrix[n]; |
| 115 | qm->Qmatrix[1][i] = s->inter_matrix[n]; |
| 116 | qm->Qmatrix[2][i] = s->chroma_intra_matrix[n]; |
| 117 | qm->Qmatrix[3][i] = s->chroma_inter_matrix[n]; |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | static void fill_slice(AVCodecContext *avctx, |
| 122 | const struct MpegEncContext *s, |
| 123 | DXVA_SliceInfo *slice, |
| 124 | unsigned position, |
| 125 | const uint8_t *buffer, unsigned size) |
| 126 | { |
| 127 | int is_field = s->picture_structure != PICT_FRAME; |
| 128 | GetBitContext gb; |
| 129 | |
| 130 | memset(slice, 0, sizeof(*slice)); |
| 131 | slice->wHorizontalPosition = s->mb_x; |
| 132 | slice->wVerticalPosition = s->mb_y >> is_field; |
| 133 | slice->dwSliceBitsInBuffer = 8 * size; |
| 134 | slice->dwSliceDataLocation = position; |
| 135 | slice->bStartCodeBitOffset = 0; |
| 136 | slice->bReservedBits = 0; |
| 137 | /* XXX We store the index of the first MB and it will be fixed later */ |
| 138 | slice->wNumberMBsInSlice = (s->mb_y >> is_field) * s->mb_width + s->mb_x; |
| 139 | slice->wBadSliceChopping = 0; |
| 140 | |
| 141 | init_get_bits(&gb, &buffer[4], 8 * (size - 4)); |
| 142 | |
| 143 | slice->wQuantizerScaleCode = get_bits(&gb, 5); |
| 144 | skip_1stop_8data_bits(&gb); |
| 145 | |
| 146 | slice->wMBbitOffset = 4 * 8 + get_bits_count(&gb); |
| 147 | } |
| 148 | static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx, |
| 149 | DXVA2_DecodeBufferDesc *bs, |
| 150 | DXVA2_DecodeBufferDesc *sc) |
| 151 | { |
| 152 | const struct MpegEncContext *s = avctx->priv_data; |
| 153 | struct dxva_context *ctx = avctx->hwaccel_context; |
| 154 | struct dxva2_picture_context *ctx_pic = |
| 155 | s->current_picture_ptr->hwaccel_picture_private; |
| 156 | const int is_field = s->picture_structure != PICT_FRAME; |
| 157 | const unsigned mb_count = s->mb_width * (s->mb_height >> is_field); |
| 158 | void *dxva_data_ptr; |
| 159 | uint8_t *dxva_data, *current, *end; |
| 160 | unsigned dxva_size; |
| 161 | unsigned i; |
| 162 | |
| 163 | if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder, |
| 164 | DXVA2_BitStreamDateBufferType, |
| 165 | &dxva_data_ptr, &dxva_size))) |
| 166 | return -1; |
| 167 | |
| 168 | dxva_data = dxva_data_ptr; |
| 169 | current = dxva_data; |
| 170 | end = dxva_data + dxva_size; |
| 171 | |
| 172 | for (i = 0; i < ctx_pic->slice_count; i++) { |
| 173 | DXVA_SliceInfo *slice = &ctx_pic->slice[i]; |
| 174 | unsigned position = slice->dwSliceDataLocation; |
| 175 | unsigned size = slice->dwSliceBitsInBuffer / 8; |
| 176 | if (size > end - current) { |
| 177 | av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream"); |
| 178 | break; |
| 179 | } |
| 180 | slice->dwSliceDataLocation = current - dxva_data; |
| 181 | |
| 182 | if (i < ctx_pic->slice_count - 1) |
| 183 | slice->wNumberMBsInSlice = |
| 184 | slice[1].wNumberMBsInSlice - slice[0].wNumberMBsInSlice; |
| 185 | else |
| 186 | slice->wNumberMBsInSlice = |
| 187 | mb_count - slice[0].wNumberMBsInSlice; |
| 188 | |
| 189 | memcpy(current, &ctx_pic->bitstream[position], size); |
| 190 | current += size; |
| 191 | } |
| 192 | if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(ctx->decoder, |
| 193 | DXVA2_BitStreamDateBufferType))) |
| 194 | return -1; |
| 195 | if (i < ctx_pic->slice_count) |
| 196 | return -1; |
| 197 | |
| 198 | memset(bs, 0, sizeof(*bs)); |
| 199 | bs->CompressedBufferType = DXVA2_BitStreamDateBufferType; |
| 200 | bs->DataSize = current - dxva_data; |
| 201 | bs->NumMBsInBuffer = mb_count; |
| 202 | |
| 203 | return ff_dxva2_commit_buffer(avctx, ctx, sc, |
| 204 | DXVA2_SliceControlBufferType, |
| 205 | ctx_pic->slice, |
| 206 | ctx_pic->slice_count * sizeof(*ctx_pic->slice), |
| 207 | mb_count); |
| 208 | } |
| 209 | |
| 210 | static int dxva2_mpeg2_start_frame(AVCodecContext *avctx, |
| 211 | av_unused const uint8_t *buffer, |
| 212 | av_unused uint32_t size) |
| 213 | { |
| 214 | const struct MpegEncContext *s = avctx->priv_data; |
| 215 | struct dxva_context *ctx = avctx->hwaccel_context; |
| 216 | struct dxva2_picture_context *ctx_pic = |
| 217 | s->current_picture_ptr->hwaccel_picture_private; |
| 218 | |
| 219 | if (!ctx->decoder || !ctx->cfg || ctx->surface_count <= 0) |
| 220 | return -1; |
| 221 | assert(ctx_pic); |
| 222 | |
| 223 | fill_picture_parameters(avctx, ctx, s, &ctx_pic->pp); |
| 224 | fill_quantization_matrices(avctx, ctx, s, &ctx_pic->qm); |
| 225 | |
| 226 | ctx_pic->slice_count = 0; |
| 227 | ctx_pic->bitstream_size = 0; |
| 228 | ctx_pic->bitstream = NULL; |
| 229 | return 0; |
| 230 | } |
| 231 | |
| 232 | static int dxva2_mpeg2_decode_slice(AVCodecContext *avctx, |
| 233 | const uint8_t *buffer, uint32_t size) |
| 234 | { |
| 235 | const struct MpegEncContext *s = avctx->priv_data; |
| 236 | struct dxva2_picture_context *ctx_pic = |
| 237 | s->current_picture_ptr->hwaccel_picture_private; |
| 238 | unsigned position; |
| 239 | |
| 240 | if (ctx_pic->slice_count >= MAX_SLICES) { |
| 241 | avpriv_request_sample(avctx, "%d slices in dxva2", |
| 242 | ctx_pic->slice_count); |
| 243 | return -1; |
| 244 | } |
| 245 | if (!ctx_pic->bitstream) |
| 246 | ctx_pic->bitstream = buffer; |
| 247 | ctx_pic->bitstream_size += size; |
| 248 | |
| 249 | position = buffer - ctx_pic->bitstream; |
| 250 | fill_slice(avctx, s, &ctx_pic->slice[ctx_pic->slice_count++], position, |
| 251 | buffer, size); |
| 252 | return 0; |
| 253 | } |
| 254 | |
| 255 | static int dxva2_mpeg2_end_frame(AVCodecContext *avctx) |
| 256 | { |
| 257 | struct MpegEncContext *s = avctx->priv_data; |
| 258 | struct dxva2_picture_context *ctx_pic = |
| 259 | s->current_picture_ptr->hwaccel_picture_private; |
| 260 | int ret; |
| 261 | |
| 262 | if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0) |
| 263 | return -1; |
| 264 | ret = ff_dxva2_common_end_frame(avctx, s->current_picture_ptr->f, |
| 265 | &ctx_pic->pp, sizeof(ctx_pic->pp), |
| 266 | &ctx_pic->qm, sizeof(ctx_pic->qm), |
| 267 | commit_bitstream_and_slice_buffer); |
| 268 | if (!ret) |
| 269 | ff_mpeg_draw_horiz_band(s, 0, avctx->height); |
| 270 | return ret; |
| 271 | } |
| 272 | |
| 273 | AVHWAccel ff_mpeg2_dxva2_hwaccel = { |
| 274 | .name = "mpeg2_dxva2", |
| 275 | .type = AVMEDIA_TYPE_VIDEO, |
| 276 | .id = AV_CODEC_ID_MPEG2VIDEO, |
| 277 | .pix_fmt = AV_PIX_FMT_DXVA2_VLD, |
| 278 | .start_frame = dxva2_mpeg2_start_frame, |
| 279 | .decode_slice = dxva2_mpeg2_decode_slice, |
| 280 | .end_frame = dxva2_mpeg2_end_frame, |
| 281 | .frame_priv_data_size = sizeof(struct dxva2_picture_context), |
| 282 | }; |