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 "config_components.h"
24
25 #include "libavutil/log.h"
26
27 #include "dxva2_internal.h"
28 #include "mpegutils.h"
29 #include "mpegvideodec.h"
30
31 #define MAX_SLICES 1024
32 struct dxva2_picture_context {
33 DXVA_PictureParameters pp;
34 DXVA_QmatrixData qm;
35 unsigned slice_count;
36 DXVA_SliceInfo slice[MAX_SLICES];
37
38 const uint8_t *bitstream;
39 unsigned bitstream_size;
40 };
41
fill_picture_parameters(AVCodecContext *avctx, AVDXVAContext *ctx, const struct MpegEncContext *s, DXVA_PictureParameters *pp)42 static void fill_picture_parameters(AVCodecContext *avctx,
43 AVDXVAContext *ctx,
44 const struct MpegEncContext *s,
45 DXVA_PictureParameters *pp)
46 {
47 const Picture *current_picture = s->current_picture_ptr;
48 int is_field = s->picture_structure != PICT_FRAME;
49
50 memset(pp, 0, sizeof(*pp));
51 pp->wDecodedPictureIndex = ff_dxva2_get_surface_index(avctx, ctx, current_picture->f);
52 pp->wDeblockedPictureIndex = 0;
53 if (s->pict_type != AV_PICTURE_TYPE_I)
54 pp->wForwardRefPictureIndex = ff_dxva2_get_surface_index(avctx, ctx, s->last_picture.f);
55 else
56 pp->wForwardRefPictureIndex = 0xffff;
57 if (s->pict_type == AV_PICTURE_TYPE_B)
58 pp->wBackwardRefPictureIndex = ff_dxva2_get_surface_index(avctx, ctx, s->next_picture.f);
59 else
60 pp->wBackwardRefPictureIndex = 0xffff;
61 pp->wPicWidthInMBminus1 = s->mb_width - 1;
62 pp->wPicHeightInMBminus1 = (s->mb_height >> is_field) - 1;
63 pp->bMacroblockWidthMinus1 = 15;
64 pp->bMacroblockHeightMinus1 = 15;
65 pp->bBlockWidthMinus1 = 7;
66 pp->bBlockHeightMinus1 = 7;
67 pp->bBPPminus1 = 7;
68 pp->bPicStructure = s->picture_structure;
69 pp->bSecondField = is_field && !s->first_field;
70 pp->bPicIntra = s->pict_type == AV_PICTURE_TYPE_I;
71 pp->bPicBackwardPrediction = s->pict_type == AV_PICTURE_TYPE_B;
72 pp->bBidirectionalAveragingMode = 0;
73 pp->bMVprecisionAndChromaRelation= 0; /* FIXME */
74 pp->bChromaFormat = s->chroma_format;
75 pp->bPicScanFixed = 1;
76 pp->bPicScanMethod = s->alternate_scan ? 1 : 0;
77 pp->bPicReadbackRequests = 0;
78 pp->bRcontrol = 0;
79 pp->bPicSpatialResid8 = 0;
80 pp->bPicOverflowBlocks = 0;
81 pp->bPicExtrapolation = 0;
82 pp->bPicDeblocked = 0;
83 pp->bPicDeblockConfined = 0;
84 pp->bPic4MVallowed = 0;
85 pp->bPicOBMC = 0;
86 pp->bPicBinPB = 0;
87 pp->bMV_RPS = 0;
88 pp->bReservedBits = 0;
89 pp->wBitstreamFcodes = (s->mpeg_f_code[0][0] << 12) |
90 (s->mpeg_f_code[0][1] << 8) |
91 (s->mpeg_f_code[1][0] << 4) |
92 (s->mpeg_f_code[1][1] );
93 pp->wBitstreamPCEelements = (s->intra_dc_precision << 14) |
94 (s->picture_structure << 12) |
95 (s->top_field_first << 11) |
96 (s->frame_pred_frame_dct << 10) |
97 (s->concealment_motion_vectors << 9) |
98 (s->q_scale_type << 8) |
99 (s->intra_vlc_format << 7) |
100 (s->alternate_scan << 6) |
101 (s->repeat_first_field << 5) |
102 (s->chroma_420_type << 4) |
103 (s->progressive_frame << 3);
104 pp->bBitstreamConcealmentNeed = 0;
105 pp->bBitstreamConcealmentMethod = 0;
106 }
107
fill_quantization_matrices(AVCodecContext *avctx, AVDXVAContext *ctx, const struct MpegEncContext *s, DXVA_QmatrixData *qm)108 static void fill_quantization_matrices(AVCodecContext *avctx,
109 AVDXVAContext *ctx,
110 const struct MpegEncContext *s,
111 DXVA_QmatrixData *qm)
112 {
113 int i;
114 for (i = 0; i < 4; i++)
115 qm->bNewQmatrix[i] = 1;
116 for (i = 0; i < 64; i++) {
117 int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
118 qm->Qmatrix[0][i] = s->intra_matrix[n];
119 qm->Qmatrix[1][i] = s->inter_matrix[n];
120 qm->Qmatrix[2][i] = s->chroma_intra_matrix[n];
121 qm->Qmatrix[3][i] = s->chroma_inter_matrix[n];
122 }
123 }
124
fill_slice(AVCodecContext *avctx, const struct MpegEncContext *s, DXVA_SliceInfo *slice, unsigned position, const uint8_t *buffer, unsigned size)125 static void fill_slice(AVCodecContext *avctx,
126 const struct MpegEncContext *s,
127 DXVA_SliceInfo *slice,
128 unsigned position,
129 const uint8_t *buffer, unsigned size)
130 {
131 int is_field = s->picture_structure != PICT_FRAME;
132 GetBitContext gb;
133
134 memset(slice, 0, sizeof(*slice));
135 slice->wHorizontalPosition = s->mb_x;
136 slice->wVerticalPosition = s->mb_y >> is_field;
137 slice->dwSliceBitsInBuffer = 8 * size;
138 slice->dwSliceDataLocation = position;
139 slice->bStartCodeBitOffset = 0;
140 slice->bReservedBits = 0;
141 /* XXX We store the index of the first MB and it will be fixed later */
142 slice->wNumberMBsInSlice = (s->mb_y >> is_field) * s->mb_width + s->mb_x;
143 slice->wBadSliceChopping = 0;
144
145 init_get_bits(&gb, &buffer[4], 8 * (size - 4));
146
147 slice->wQuantizerScaleCode = get_bits(&gb, 5);
148 skip_1stop_8data_bits(&gb);
149
150 slice->wMBbitOffset = 4 * 8 + get_bits_count(&gb);
151 }
commit_bitstream_and_slice_buffer(AVCodecContext *avctx, DECODER_BUFFER_DESC *bs, DECODER_BUFFER_DESC *sc)152 static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
153 DECODER_BUFFER_DESC *bs,
154 DECODER_BUFFER_DESC *sc)
155 {
156 const struct MpegEncContext *s = avctx->priv_data;
157 AVDXVAContext *ctx = DXVA_CONTEXT(avctx);
158 struct dxva2_picture_context *ctx_pic =
159 s->current_picture_ptr->hwaccel_picture_private;
160 const int is_field = s->picture_structure != PICT_FRAME;
161 const unsigned mb_count = s->mb_width * (s->mb_height >> is_field);
162 void *dxva_data_ptr;
163 uint8_t *dxva_data, *current, *end;
164 unsigned dxva_size;
165 unsigned i;
166 unsigned type;
167
168 #if CONFIG_D3D11VA
169 if (ff_dxva2_is_d3d11(avctx)) {
170 type = D3D11_VIDEO_DECODER_BUFFER_BITSTREAM;
171 if (FAILED(ID3D11VideoContext_GetDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context,
172 D3D11VA_CONTEXT(ctx)->decoder,
173 type,
174 &dxva_size, &dxva_data_ptr)))
175 return -1;
176 }
177 #endif
178 #if CONFIG_DXVA2
179 if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
180 type = DXVA2_BitStreamDateBufferType;
181 if (FAILED(IDirectXVideoDecoder_GetBuffer(DXVA2_CONTEXT(ctx)->decoder,
182 type,
183 &dxva_data_ptr, &dxva_size)))
184 return -1;
185 }
186 #endif
187
188 dxva_data = dxva_data_ptr;
189 current = dxva_data;
190 end = dxva_data + dxva_size;
191
192 for (i = 0; i < ctx_pic->slice_count; i++) {
193 DXVA_SliceInfo *slice = &ctx_pic->slice[i];
194 unsigned position = slice->dwSliceDataLocation;
195 unsigned size = slice->dwSliceBitsInBuffer / 8;
196 if (size > end - current) {
197 av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
198 break;
199 }
200 slice->dwSliceDataLocation = current - dxva_data;
201
202 if (i < ctx_pic->slice_count - 1)
203 slice->wNumberMBsInSlice =
204 slice[1].wNumberMBsInSlice - slice[0].wNumberMBsInSlice;
205 else
206 slice->wNumberMBsInSlice =
207 mb_count - slice[0].wNumberMBsInSlice;
208
209 memcpy(current, &ctx_pic->bitstream[position], size);
210 current += size;
211 }
212 #if CONFIG_D3D11VA
213 if (ff_dxva2_is_d3d11(avctx))
214 if (FAILED(ID3D11VideoContext_ReleaseDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context, D3D11VA_CONTEXT(ctx)->decoder, type)))
215 return -1;
216 #endif
217 #if CONFIG_DXVA2
218 if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD)
219 if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(DXVA2_CONTEXT(ctx)->decoder, type)))
220 return -1;
221 #endif
222 if (i < ctx_pic->slice_count)
223 return -1;
224
225 #if CONFIG_D3D11VA
226 if (ff_dxva2_is_d3d11(avctx)) {
227 D3D11_VIDEO_DECODER_BUFFER_DESC *dsc11 = bs;
228 memset(dsc11, 0, sizeof(*dsc11));
229 dsc11->BufferType = type;
230 dsc11->DataSize = current - dxva_data;
231 dsc11->NumMBsInBuffer = mb_count;
232
233 type = D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL;
234 }
235 #endif
236 #if CONFIG_DXVA2
237 if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
238 DXVA2_DecodeBufferDesc *dsc2 = bs;
239 memset(dsc2, 0, sizeof(*dsc2));
240 dsc2->CompressedBufferType = type;
241 dsc2->DataSize = current - dxva_data;
242 dsc2->NumMBsInBuffer = mb_count;
243
244 type = DXVA2_SliceControlBufferType;
245 }
246 #endif
247
248 return ff_dxva2_commit_buffer(avctx, ctx, sc,
249 type,
250 ctx_pic->slice,
251 ctx_pic->slice_count * sizeof(*ctx_pic->slice),
252 mb_count);
253 }
254
dxva2_mpeg2_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)255 static int dxva2_mpeg2_start_frame(AVCodecContext *avctx,
256 av_unused const uint8_t *buffer,
257 av_unused uint32_t size)
258 {
259 const struct MpegEncContext *s = avctx->priv_data;
260 AVDXVAContext *ctx = DXVA_CONTEXT(avctx);
261 struct dxva2_picture_context *ctx_pic =
262 s->current_picture_ptr->hwaccel_picture_private;
263
264 if (!DXVA_CONTEXT_VALID(avctx, ctx))
265 return -1;
266 assert(ctx_pic);
267
268 fill_picture_parameters(avctx, ctx, s, &ctx_pic->pp);
269 fill_quantization_matrices(avctx, ctx, s, &ctx_pic->qm);
270
271 ctx_pic->slice_count = 0;
272 ctx_pic->bitstream_size = 0;
273 ctx_pic->bitstream = NULL;
274 return 0;
275 }
276
dxva2_mpeg2_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)277 static int dxva2_mpeg2_decode_slice(AVCodecContext *avctx,
278 const uint8_t *buffer, uint32_t size)
279 {
280 const struct MpegEncContext *s = avctx->priv_data;
281 struct dxva2_picture_context *ctx_pic =
282 s->current_picture_ptr->hwaccel_picture_private;
283 unsigned position;
284
285 if (ctx_pic->slice_count >= MAX_SLICES) {
286 avpriv_request_sample(avctx, "%d slices in dxva2",
287 ctx_pic->slice_count);
288 return -1;
289 }
290 if (!ctx_pic->bitstream)
291 ctx_pic->bitstream = buffer;
292 ctx_pic->bitstream_size += size;
293
294 position = buffer - ctx_pic->bitstream;
295 fill_slice(avctx, s, &ctx_pic->slice[ctx_pic->slice_count++], position,
296 buffer, size);
297 return 0;
298 }
299
dxva2_mpeg2_end_frame(AVCodecContext *avctx)300 static int dxva2_mpeg2_end_frame(AVCodecContext *avctx)
301 {
302 struct MpegEncContext *s = avctx->priv_data;
303 struct dxva2_picture_context *ctx_pic =
304 s->current_picture_ptr->hwaccel_picture_private;
305 int ret;
306
307 if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
308 return -1;
309 ret = ff_dxva2_common_end_frame(avctx, s->current_picture_ptr->f,
310 &ctx_pic->pp, sizeof(ctx_pic->pp),
311 &ctx_pic->qm, sizeof(ctx_pic->qm),
312 commit_bitstream_and_slice_buffer);
313 if (!ret)
314 ff_mpeg_draw_horiz_band(s, 0, avctx->height);
315 return ret;
316 }
317
318 #if CONFIG_MPEG2_DXVA2_HWACCEL
319 const AVHWAccel ff_mpeg2_dxva2_hwaccel = {
320 .name = "mpeg2_dxva2",
321 .type = AVMEDIA_TYPE_VIDEO,
322 .id = AV_CODEC_ID_MPEG2VIDEO,
323 .pix_fmt = AV_PIX_FMT_DXVA2_VLD,
324 .init = ff_dxva2_decode_init,
325 .uninit = ff_dxva2_decode_uninit,
326 .start_frame = dxva2_mpeg2_start_frame,
327 .decode_slice = dxva2_mpeg2_decode_slice,
328 .end_frame = dxva2_mpeg2_end_frame,
329 .frame_params = ff_dxva2_common_frame_params,
330 .frame_priv_data_size = sizeof(struct dxva2_picture_context),
331 .priv_data_size = sizeof(FFDXVASharedContext),
332 };
333 #endif
334
335 #if CONFIG_MPEG2_D3D11VA_HWACCEL
336 const AVHWAccel ff_mpeg2_d3d11va_hwaccel = {
337 .name = "mpeg2_d3d11va",
338 .type = AVMEDIA_TYPE_VIDEO,
339 .id = AV_CODEC_ID_MPEG2VIDEO,
340 .pix_fmt = AV_PIX_FMT_D3D11VA_VLD,
341 .init = ff_dxva2_decode_init,
342 .uninit = ff_dxva2_decode_uninit,
343 .start_frame = dxva2_mpeg2_start_frame,
344 .decode_slice = dxva2_mpeg2_decode_slice,
345 .end_frame = dxva2_mpeg2_end_frame,
346 .frame_params = ff_dxva2_common_frame_params,
347 .frame_priv_data_size = sizeof(struct dxva2_picture_context),
348 .priv_data_size = sizeof(FFDXVASharedContext),
349 };
350 #endif
351
352 #if CONFIG_MPEG2_D3D11VA2_HWACCEL
353 const AVHWAccel ff_mpeg2_d3d11va2_hwaccel = {
354 .name = "mpeg2_d3d11va2",
355 .type = AVMEDIA_TYPE_VIDEO,
356 .id = AV_CODEC_ID_MPEG2VIDEO,
357 .pix_fmt = AV_PIX_FMT_D3D11,
358 .init = ff_dxva2_decode_init,
359 .uninit = ff_dxva2_decode_uninit,
360 .start_frame = dxva2_mpeg2_start_frame,
361 .decode_slice = dxva2_mpeg2_decode_slice,
362 .end_frame = dxva2_mpeg2_end_frame,
363 .frame_params = ff_dxva2_common_frame_params,
364 .frame_priv_data_size = sizeof(struct dxva2_picture_context),
365 .priv_data_size = sizeof(FFDXVASharedContext),
366 };
367 #endif
368