FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
h264_mb_template.c
Go to the documentation of this file.
1 /*
2  * H.26L/H.264/AVC/JVT/14496-10/... decoder
3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #undef FUNC
23 #undef PIXEL_SHIFT
24 
25 #if SIMPLE
26 # define FUNC(n) AV_JOIN(n ## _simple_, BITS)
27 # define PIXEL_SHIFT (BITS >> 4)
28 #else
29 # define FUNC(n) n ## _complex
30 # define PIXEL_SHIFT h->pixel_shift
31 #endif
32 
33 #undef CHROMA_IDC
34 #define CHROMA_IDC 1
35 #include "h264_mc_template.c"
36 
37 #undef CHROMA_IDC
38 #define CHROMA_IDC 2
39 #include "h264_mc_template.c"
40 
41 static av_noinline void FUNC(hl_decode_mb)(H264Context *h)
42 {
43  const int mb_x = h->mb_x;
44  const int mb_y = h->mb_y;
45  const int mb_xy = h->mb_xy;
46  const int mb_type = h->cur_pic.mb_type[mb_xy];
47  uint8_t *dest_y, *dest_cb, *dest_cr;
48  int linesize, uvlinesize /*dct_offset*/;
49  int i, j;
50  int *block_offset = &h->block_offset[0];
51  const int transform_bypass = !SIMPLE && (h->qscale == 0 && h->sps.transform_bypass);
52  /* is_h264 should always be true if SVQ3 is disabled. */
53  const int is_h264 = !CONFIG_SVQ3_DECODER || SIMPLE || h->avctx->codec_id == AV_CODEC_ID_H264;
54  void (*idct_add)(uint8_t *dst, int16_t *block, int stride);
55  const int block_h = 16 >> h->chroma_y_shift;
56  const int chroma422 = CHROMA422(h);
57 
58  dest_y = h->cur_pic.f.data[0] + ((mb_x << PIXEL_SHIFT) + mb_y * h->linesize) * 16;
59  dest_cb = h->cur_pic.f.data[1] + (mb_x << PIXEL_SHIFT) * 8 + mb_y * h->uvlinesize * block_h;
60  dest_cr = h->cur_pic.f.data[2] + (mb_x << PIXEL_SHIFT) * 8 + mb_y * h->uvlinesize * block_h;
61 
62  h->vdsp.prefetch(dest_y + (h->mb_x & 3) * 4 * h->linesize + (64 << PIXEL_SHIFT), h->linesize, 4);
63  h->vdsp.prefetch(dest_cb + (h->mb_x & 7) * h->uvlinesize + (64 << PIXEL_SHIFT), dest_cr - dest_cb, 2);
64 
65  h->list_counts[mb_xy] = h->list_count;
66 
67  if (!SIMPLE && MB_FIELD(h)) {
68  linesize = h->mb_linesize = h->linesize * 2;
69  uvlinesize = h->mb_uvlinesize = h->uvlinesize * 2;
70  block_offset = &h->block_offset[48];
71  if (mb_y & 1) { // FIXME move out of this function?
72  dest_y -= h->linesize * 15;
73  dest_cb -= h->uvlinesize * (block_h - 1);
74  dest_cr -= h->uvlinesize * (block_h - 1);
75  }
76  if (FRAME_MBAFF(h)) {
77  int list;
78  for (list = 0; list < h->list_count; list++) {
79  if (!USES_LIST(mb_type, list))
80  continue;
81  if (IS_16X16(mb_type)) {
82  int8_t *ref = &h->ref_cache[list][scan8[0]];
83  fill_rectangle(ref, 4, 4, 8, (16 + *ref) ^ (h->mb_y & 1), 1);
84  } else {
85  for (i = 0; i < 16; i += 4) {
86  int ref = h->ref_cache[list][scan8[i]];
87  if (ref >= 0)
88  fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2,
89  8, (16 + ref) ^ (h->mb_y & 1), 1);
90  }
91  }
92  }
93  }
94  } else {
95  linesize = h->mb_linesize = h->linesize;
96  uvlinesize = h->mb_uvlinesize = h->uvlinesize;
97  // dct_offset = s->linesize * 16;
98  }
99 
100  if (!SIMPLE && IS_INTRA_PCM(mb_type)) {
101  const int bit_depth = h->sps.bit_depth_luma;
102  if (PIXEL_SHIFT) {
103  int j;
104  GetBitContext gb;
105  init_get_bits(&gb, h->intra_pcm_ptr,
106  ff_h264_mb_sizes[h->sps.chroma_format_idc] * bit_depth);
107 
108  for (i = 0; i < 16; i++) {
109  uint16_t *tmp_y = (uint16_t *)(dest_y + i * linesize);
110  for (j = 0; j < 16; j++)
111  tmp_y[j] = get_bits(&gb, bit_depth);
112  }
113  if (SIMPLE || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
114  if (!h->sps.chroma_format_idc) {
115  for (i = 0; i < block_h; i++) {
116  uint16_t *tmp_cb = (uint16_t *)(dest_cb + i * uvlinesize);
117  uint16_t *tmp_cr = (uint16_t *)(dest_cr + i * uvlinesize);
118  for (j = 0; j < 8; j++) {
119  tmp_cb[j] = tmp_cr[j] = 1 << (bit_depth - 1);
120  }
121  }
122  } else {
123  for (i = 0; i < block_h; i++) {
124  uint16_t *tmp_cb = (uint16_t *)(dest_cb + i * uvlinesize);
125  for (j = 0; j < 8; j++)
126  tmp_cb[j] = get_bits(&gb, bit_depth);
127  }
128  for (i = 0; i < block_h; i++) {
129  uint16_t *tmp_cr = (uint16_t *)(dest_cr + i * uvlinesize);
130  for (j = 0; j < 8; j++)
131  tmp_cr[j] = get_bits(&gb, bit_depth);
132  }
133  }
134  }
135  } else {
136  for (i = 0; i < 16; i++)
137  memcpy(dest_y + i * linesize, h->intra_pcm_ptr + i * 16, 16);
138  if (SIMPLE || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
139  if (!h->sps.chroma_format_idc) {
140  for (i = 0; i < 8; i++) {
141  memset(dest_cb + i*uvlinesize, 1 << (bit_depth - 1), 8);
142  memset(dest_cr + i*uvlinesize, 1 << (bit_depth - 1), 8);
143  }
144  } else {
145  const uint8_t *src_cb = h->intra_pcm_ptr + 256;
146  const uint8_t *src_cr = h->intra_pcm_ptr + 256 + block_h * 8;
147  for (i = 0; i < block_h; i++) {
148  memcpy(dest_cb + i * uvlinesize, src_cb + i * 8, 8);
149  memcpy(dest_cr + i * uvlinesize, src_cr + i * 8, 8);
150  }
151  }
152  }
153  }
154  } else {
155  if (IS_INTRA(mb_type)) {
156  if (h->deblocking_filter)
157  xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize,
158  uvlinesize, 1, 0, SIMPLE, PIXEL_SHIFT);
159 
160  if (SIMPLE || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
161  h->hpc.pred8x8[h->chroma_pred_mode](dest_cb, uvlinesize);
162  h->hpc.pred8x8[h->chroma_pred_mode](dest_cr, uvlinesize);
163  }
164 
165  hl_decode_mb_predict_luma(h, mb_type, is_h264, SIMPLE,
166  transform_bypass, PIXEL_SHIFT,
167  block_offset, linesize, dest_y, 0);
168 
169  if (h->deblocking_filter)
170  xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize,
171  uvlinesize, 0, 0, SIMPLE, PIXEL_SHIFT);
172  } else if (is_h264) {
173  if (chroma422) {
174  FUNC(hl_motion_422)(h, dest_y, dest_cb, dest_cr,
175  h->me.qpel_put, h->h264chroma.put_h264_chroma_pixels_tab,
176  h->me.qpel_avg, h->h264chroma.avg_h264_chroma_pixels_tab,
177  h->h264dsp.weight_h264_pixels_tab,
178  h->h264dsp.biweight_h264_pixels_tab);
179  } else {
180  FUNC(hl_motion_420)(h, dest_y, dest_cb, dest_cr,
181  h->me.qpel_put, h->h264chroma.put_h264_chroma_pixels_tab,
182  h->me.qpel_avg, h->h264chroma.avg_h264_chroma_pixels_tab,
183  h->h264dsp.weight_h264_pixels_tab,
184  h->h264dsp.biweight_h264_pixels_tab);
185  }
186  }
187 
188  hl_decode_mb_idct_luma(h, mb_type, is_h264, SIMPLE, transform_bypass,
189  PIXEL_SHIFT, block_offset, linesize, dest_y, 0);
190 
191  if ((SIMPLE || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) &&
192  (h->cbp & 0x30)) {
193  uint8_t *dest[2] = { dest_cb, dest_cr };
194  if (transform_bypass) {
195  if (IS_INTRA(mb_type) && h->sps.profile_idc == 244 &&
196  (h->chroma_pred_mode == VERT_PRED8x8 ||
197  h->chroma_pred_mode == HOR_PRED8x8)) {
198  h->hpc.pred8x8_add[h->chroma_pred_mode](dest[0],
199  block_offset + 16,
200  h->mb + (16 * 16 * 1 << PIXEL_SHIFT),
201  uvlinesize);
202  h->hpc.pred8x8_add[h->chroma_pred_mode](dest[1],
203  block_offset + 32,
204  h->mb + (16 * 16 * 2 << PIXEL_SHIFT),
205  uvlinesize);
206  } else {
207  idct_add = h->h264dsp.h264_add_pixels4_clear;
208  for (j = 1; j < 3; j++) {
209  for (i = j * 16; i < j * 16 + 4; i++)
210  if (h->non_zero_count_cache[scan8[i]] ||
211  dctcoef_get(h->mb, PIXEL_SHIFT, i * 16))
212  idct_add(dest[j - 1] + block_offset[i],
213  h->mb + (i * 16 << PIXEL_SHIFT),
214  uvlinesize);
215  if (chroma422) {
216  for (i = j * 16 + 4; i < j * 16 + 8; i++)
217  if (h->non_zero_count_cache[scan8[i + 4]] ||
218  dctcoef_get(h->mb, PIXEL_SHIFT, i * 16))
219  idct_add(dest[j - 1] + block_offset[i + 4],
220  h->mb + (i * 16 << PIXEL_SHIFT),
221  uvlinesize);
222  }
223  }
224  }
225  } else {
226  if (is_h264) {
227  int qp[2];
228  if (chroma422) {
229  qp[0] = h->chroma_qp[0] + 3;
230  qp[1] = h->chroma_qp[1] + 3;
231  } else {
232  qp[0] = h->chroma_qp[0];
233  qp[1] = h->chroma_qp[1];
234  }
235  if (h->non_zero_count_cache[scan8[CHROMA_DC_BLOCK_INDEX + 0]])
236  h->h264dsp.h264_chroma_dc_dequant_idct(h->mb + (16 * 16 * 1 << PIXEL_SHIFT),
237  h->dequant4_coeff[IS_INTRA(mb_type) ? 1 : 4][qp[0]][0]);
238  if (h->non_zero_count_cache[scan8[CHROMA_DC_BLOCK_INDEX + 1]])
239  h->h264dsp.h264_chroma_dc_dequant_idct(h->mb + (16 * 16 * 2 << PIXEL_SHIFT),
240  h->dequant4_coeff[IS_INTRA(mb_type) ? 2 : 5][qp[1]][0]);
241  h->h264dsp.h264_idct_add8(dest, block_offset,
242  h->mb, uvlinesize,
243  h->non_zero_count_cache);
244  } else if (CONFIG_SVQ3_DECODER) {
245  h->h264dsp.h264_chroma_dc_dequant_idct(h->mb + 16 * 16 * 1,
246  h->dequant4_coeff[IS_INTRA(mb_type) ? 1 : 4][h->chroma_qp[0]][0]);
247  h->h264dsp.h264_chroma_dc_dequant_idct(h->mb + 16 * 16 * 2,
248  h->dequant4_coeff[IS_INTRA(mb_type) ? 2 : 5][h->chroma_qp[1]][0]);
249  for (j = 1; j < 3; j++) {
250  for (i = j * 16; i < j * 16 + 4; i++)
251  if (h->non_zero_count_cache[scan8[i]] || h->mb[i * 16]) {
252  uint8_t *const ptr = dest[j - 1] + block_offset[i];
253  ff_svq3_add_idct_c(ptr, h->mb + i * 16,
254  uvlinesize,
255  ff_h264_chroma_qp[0][h->qscale + 12] - 12, 2);
256  }
257  }
258  }
259  }
260  }
261  }
262 }
263 
264 #if !SIMPLE || BITS == 8
265 
266 #undef CHROMA_IDC
267 #define CHROMA_IDC 3
268 #include "h264_mc_template.c"
269 
270 static av_noinline void FUNC(hl_decode_mb_444)(H264Context *h)
271 {
272  const int mb_x = h->mb_x;
273  const int mb_y = h->mb_y;
274  const int mb_xy = h->mb_xy;
275  const int mb_type = h->cur_pic.mb_type[mb_xy];
276  uint8_t *dest[3];
277  int linesize;
278  int i, j, p;
279  int *block_offset = &h->block_offset[0];
280  const int transform_bypass = !SIMPLE && (h->qscale == 0 && h->sps.transform_bypass);
281  const int plane_count = (SIMPLE || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) ? 3 : 1;
282 
283  for (p = 0; p < plane_count; p++) {
284  dest[p] = h->cur_pic.f.data[p] +
285  ((mb_x << PIXEL_SHIFT) + mb_y * h->linesize) * 16;
286  h->vdsp.prefetch(dest[p] + (h->mb_x & 3) * 4 * h->linesize + (64 << PIXEL_SHIFT),
287  h->linesize, 4);
288  }
289 
290  h->list_counts[mb_xy] = h->list_count;
291 
292  if (!SIMPLE && MB_FIELD(h)) {
293  linesize = h->mb_linesize = h->mb_uvlinesize = h->linesize * 2;
294  block_offset = &h->block_offset[48];
295  if (mb_y & 1) // FIXME move out of this function?
296  for (p = 0; p < 3; p++)
297  dest[p] -= h->linesize * 15;
298  if (FRAME_MBAFF(h)) {
299  int list;
300  for (list = 0; list < h->list_count; list++) {
301  if (!USES_LIST(mb_type, list))
302  continue;
303  if (IS_16X16(mb_type)) {
304  int8_t *ref = &h->ref_cache[list][scan8[0]];
305  fill_rectangle(ref, 4, 4, 8, (16 + *ref) ^ (h->mb_y & 1), 1);
306  } else {
307  for (i = 0; i < 16; i += 4) {
308  int ref = h->ref_cache[list][scan8[i]];
309  if (ref >= 0)
310  fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2,
311  8, (16 + ref) ^ (h->mb_y & 1), 1);
312  }
313  }
314  }
315  }
316  } else {
317  linesize = h->mb_linesize = h->mb_uvlinesize = h->linesize;
318  }
319 
320  if (!SIMPLE && IS_INTRA_PCM(mb_type)) {
321  if (PIXEL_SHIFT) {
322  const int bit_depth = h->sps.bit_depth_luma;
323  GetBitContext gb;
324  init_get_bits(&gb, h->intra_pcm_ptr, 768 * bit_depth);
325 
326  for (p = 0; p < plane_count; p++)
327  for (i = 0; i < 16; i++) {
328  uint16_t *tmp = (uint16_t *)(dest[p] + i * linesize);
329  for (j = 0; j < 16; j++)
330  tmp[j] = get_bits(&gb, bit_depth);
331  }
332  } else {
333  for (p = 0; p < plane_count; p++)
334  for (i = 0; i < 16; i++)
335  memcpy(dest[p] + i * linesize,
336  h->intra_pcm_ptr + p * 256 + i * 16, 16);
337  }
338  } else {
339  if (IS_INTRA(mb_type)) {
340  if (h->deblocking_filter)
341  xchg_mb_border(h, dest[0], dest[1], dest[2], linesize,
342  linesize, 1, 1, SIMPLE, PIXEL_SHIFT);
343 
344  for (p = 0; p < plane_count; p++)
345  hl_decode_mb_predict_luma(h, mb_type, 1, SIMPLE,
346  transform_bypass, PIXEL_SHIFT,
347  block_offset, linesize, dest[p], p);
348 
349  if (h->deblocking_filter)
350  xchg_mb_border(h, dest[0], dest[1], dest[2], linesize,
351  linesize, 0, 1, SIMPLE, PIXEL_SHIFT);
352  } else {
353  FUNC(hl_motion_444)(h, dest[0], dest[1], dest[2],
354  h->me.qpel_put, h->h264chroma.put_h264_chroma_pixels_tab,
355  h->me.qpel_avg, h->h264chroma.avg_h264_chroma_pixels_tab,
356  h->h264dsp.weight_h264_pixels_tab,
357  h->h264dsp.biweight_h264_pixels_tab);
358  }
359 
360  for (p = 0; p < plane_count; p++)
361  hl_decode_mb_idct_luma(h, mb_type, 1, SIMPLE, transform_bypass,
362  PIXEL_SHIFT, block_offset, linesize,
363  dest[p], p);
364  }
365 }
366 
367 #endif
Generated on Sat Jan 25 2014 19:51:48 for FFmpeg by   doxygen 1.8.2