1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
FUNC(frame_sync_code)19 static int FUNC(frame_sync_code)(CodedBitstreamContext *ctx, RWContext *rw,
20 VP9RawFrameHeader *current)
21 {
22 int err;
23
24 fixed(8, frame_sync_byte_0, VP9_FRAME_SYNC_0);
25 fixed(8, frame_sync_byte_1, VP9_FRAME_SYNC_1);
26 fixed(8, frame_sync_byte_2, VP9_FRAME_SYNC_2);
27
28 return 0;
29 }
30
FUNC(color_config)31 static int FUNC(color_config)(CodedBitstreamContext *ctx, RWContext *rw,
32 VP9RawFrameHeader *current, int profile)
33 {
34 CodedBitstreamVP9Context *vp9 = ctx->priv_data;
35 int err;
36
37 if (profile >= 2) {
38 f(1, ten_or_twelve_bit);
39 vp9->bit_depth = current->ten_or_twelve_bit ? 12 : 10;
40 } else
41 vp9->bit_depth = 8;
42
43 f(3, color_space);
44
45 if (current->color_space != VP9_CS_RGB) {
46 f(1, color_range);
47 if (profile == 1 || profile == 3) {
48 f(1, subsampling_x);
49 f(1, subsampling_y);
50 fixed(1, reserved_zero, 0);
51 } else {
52 infer(subsampling_x, 1);
53 infer(subsampling_y, 1);
54 }
55 } else {
56 infer(color_range, 1);
57 if (profile == 1 || profile == 3) {
58 infer(subsampling_x, 0);
59 infer(subsampling_y, 0);
60 fixed(1, reserved_zero, 0);
61 }
62 }
63
64 vp9->subsampling_x = current->subsampling_x;
65 vp9->subsampling_y = current->subsampling_y;
66
67 return 0;
68 }
69
FUNC(frame_size)70 static int FUNC(frame_size)(CodedBitstreamContext *ctx, RWContext *rw,
71 VP9RawFrameHeader *current)
72 {
73 CodedBitstreamVP9Context *vp9 = ctx->priv_data;
74 int err;
75
76 f(16, frame_width_minus_1);
77 f(16, frame_height_minus_1);
78
79 vp9->frame_width = current->frame_width_minus_1 + 1;
80 vp9->frame_height = current->frame_height_minus_1 + 1;
81
82 vp9->mi_cols = (vp9->frame_width + 7) >> 3;
83 vp9->mi_rows = (vp9->frame_height + 7) >> 3;
84 vp9->sb64_cols = (vp9->mi_cols + 7) >> 3;
85 vp9->sb64_rows = (vp9->mi_rows + 7) >> 3;
86
87 return 0;
88 }
89
FUNC(render_size)90 static int FUNC(render_size)(CodedBitstreamContext *ctx, RWContext *rw,
91 VP9RawFrameHeader *current)
92 {
93 int err;
94
95 f(1, render_and_frame_size_different);
96
97 if (current->render_and_frame_size_different) {
98 f(16, render_width_minus_1);
99 f(16, render_height_minus_1);
100 }
101
102 return 0;
103 }
104
FUNC(frame_size_with_refs)105 static int FUNC(frame_size_with_refs)(CodedBitstreamContext *ctx, RWContext *rw,
106 VP9RawFrameHeader *current)
107 {
108 CodedBitstreamVP9Context *vp9 = ctx->priv_data;
109 int err, i;
110
111 for (i = 0; i < VP9_REFS_PER_FRAME; i++) {
112 fs(1, found_ref[i], 1, i);
113 if (current->found_ref[i]) {
114 VP9ReferenceFrameState *ref =
115 &vp9->ref[current->ref_frame_idx[i]];
116
117 vp9->frame_width = ref->frame_width;
118 vp9->frame_height = ref->frame_height;
119
120 vp9->subsampling_x = ref->subsampling_x;
121 vp9->subsampling_y = ref->subsampling_y;
122 vp9->bit_depth = ref->bit_depth;
123
124 break;
125 }
126 }
127 if (i >= VP9_REFS_PER_FRAME)
128 CHECK(FUNC(frame_size)(ctx, rw, current));
129 else {
130 vp9->mi_cols = (vp9->frame_width + 7) >> 3;
131 vp9->mi_rows = (vp9->frame_height + 7) >> 3;
132 vp9->sb64_cols = (vp9->mi_cols + 7) >> 3;
133 vp9->sb64_rows = (vp9->mi_rows + 7) >> 3;
134 }
135 CHECK(FUNC(render_size)(ctx, rw, current));
136
137 return 0;
138 }
139
FUNC(interpolation_filter)140 static int FUNC(interpolation_filter)(CodedBitstreamContext *ctx, RWContext *rw,
141 VP9RawFrameHeader *current)
142 {
143 int err;
144
145 f(1, is_filter_switchable);
146 if (!current->is_filter_switchable)
147 f(2, raw_interpolation_filter_type);
148
149 return 0;
150 }
151
FUNC(loop_filter_params)152 static int FUNC(loop_filter_params)(CodedBitstreamContext *ctx, RWContext *rw,
153 VP9RawFrameHeader *current)
154 {
155 int err, i;
156
157 f(6, loop_filter_level);
158 f(3, loop_filter_sharpness);
159
160 f(1, loop_filter_delta_enabled);
161 if (current->loop_filter_delta_enabled) {
162 f(1, loop_filter_delta_update);
163 if (current->loop_filter_delta_update) {
164 for (i = 0; i < VP9_MAX_REF_FRAMES; i++) {
165 fs(1, update_ref_delta[i], 1, i);
166 if (current->update_ref_delta[i])
167 ss(6, loop_filter_ref_deltas[i], 1, i);
168 }
169 for (i = 0; i < 2; i++) {
170 fs(1, update_mode_delta[i], 1, i);
171 if (current->update_mode_delta[i])
172 ss(6, loop_filter_mode_deltas[i], 1, i);
173 }
174 }
175 }
176
177 return 0;
178 }
179
FUNC(quantization_params)180 static int FUNC(quantization_params)(CodedBitstreamContext *ctx, RWContext *rw,
181 VP9RawFrameHeader *current)
182 {
183 int err;
184
185 f(8, base_q_idx);
186
187 delta_q(delta_q_y_dc);
188 delta_q(delta_q_uv_dc);
189 delta_q(delta_q_uv_ac);
190
191 return 0;
192 }
193
FUNC(segmentation_params)194 static int FUNC(segmentation_params)(CodedBitstreamContext *ctx, RWContext *rw,
195 VP9RawFrameHeader *current)
196 {
197 static const uint8_t segmentation_feature_bits[VP9_SEG_LVL_MAX] = { 8, 6, 2, 0 };
198 static const uint8_t segmentation_feature_signed[VP9_SEG_LVL_MAX] = { 1, 1, 0, 0 };
199
200 int err, i, j;
201
202 f(1, segmentation_enabled);
203
204 if (current->segmentation_enabled) {
205 f(1, segmentation_update_map);
206 if (current->segmentation_update_map) {
207 for (i = 0; i < 7; i++)
208 prob(segmentation_tree_probs[i], 1, i);
209 f(1, segmentation_temporal_update);
210 for (i = 0; i < 3; i++) {
211 if (current->segmentation_temporal_update)
212 prob(segmentation_pred_prob[i], 1, i);
213 else
214 infer(segmentation_pred_prob[i], 255);
215 }
216 }
217
218 f(1, segmentation_update_data);
219 if (current->segmentation_update_data) {
220 f(1, segmentation_abs_or_delta_update);
221 for (i = 0; i < VP9_MAX_SEGMENTS; i++) {
222 for (j = 0; j < VP9_SEG_LVL_MAX; j++) {
223 fs(1, feature_enabled[i][j], 2, i, j);
224 if (current->feature_enabled[i][j] &&
225 segmentation_feature_bits[j]) {
226 fs(segmentation_feature_bits[j],
227 feature_value[i][j], 2, i, j);
228 if (segmentation_feature_signed[j])
229 fs(1, feature_sign[i][j], 2, i, j);
230 else
231 infer(feature_sign[i][j], 0);
232 } else {
233 infer(feature_value[i][j], 0);
234 infer(feature_sign[i][j], 0);
235 }
236 }
237 }
238 }
239 }
240
241 return 0;
242 }
243
FUNC(tile_info)244 static int FUNC(tile_info)(CodedBitstreamContext *ctx, RWContext *rw,
245 VP9RawFrameHeader *current)
246 {
247 CodedBitstreamVP9Context *vp9 = ctx->priv_data;
248 int min_log2_tile_cols, max_log2_tile_cols;
249 int err;
250
251 min_log2_tile_cols = 0;
252 while ((VP9_MAX_TILE_WIDTH_B64 << min_log2_tile_cols) < vp9->sb64_cols)
253 ++min_log2_tile_cols;
254 max_log2_tile_cols = 0;
255 while ((vp9->sb64_cols >> (max_log2_tile_cols + 1)) >= VP9_MIN_TILE_WIDTH_B64)
256 ++max_log2_tile_cols;
257
258 increment(tile_cols_log2, min_log2_tile_cols, max_log2_tile_cols);
259
260 increment(tile_rows_log2, 0, 2);
261
262 return 0;
263 }
264
FUNC(uncompressed_header)265 static int FUNC(uncompressed_header)(CodedBitstreamContext *ctx, RWContext *rw,
266 VP9RawFrameHeader *current)
267 {
268 CodedBitstreamVP9Context *vp9 = ctx->priv_data;
269 int err, i;
270
271 f(2, frame_marker);
272
273 f(1, profile_low_bit);
274 f(1, profile_high_bit);
275 vp9->profile = (current->profile_high_bit << 1) + current->profile_low_bit;
276 if (vp9->profile == 3)
277 fixed(1, reserved_zero, 0);
278
279 f(1, show_existing_frame);
280 if (current->show_existing_frame) {
281 f(3, frame_to_show_map_idx);
282 infer(header_size_in_bytes, 0);
283 infer(refresh_frame_flags, 0x00);
284 infer(loop_filter_level, 0);
285 return 0;
286 }
287
288 f(1, frame_type);
289 f(1, show_frame);
290 f(1, error_resilient_mode);
291
292 if (current->frame_type == VP9_KEY_FRAME) {
293 CHECK(FUNC(frame_sync_code)(ctx, rw, current));
294 CHECK(FUNC(color_config)(ctx, rw, current, vp9->profile));
295 CHECK(FUNC(frame_size)(ctx, rw, current));
296 CHECK(FUNC(render_size)(ctx, rw, current));
297
298 infer(refresh_frame_flags, 0xff);
299
300 } else {
301 if (current->show_frame == 0)
302 f(1, intra_only);
303 else
304 infer(intra_only, 0);
305
306 if (current->error_resilient_mode == 0)
307 f(2, reset_frame_context);
308 else
309 infer(reset_frame_context, 0);
310
311 if (current->intra_only == 1) {
312 CHECK(FUNC(frame_sync_code)(ctx, rw, current));
313
314 if (vp9->profile > 0) {
315 CHECK(FUNC(color_config)(ctx, rw, current, vp9->profile));
316 } else {
317 infer(color_space, 1);
318 infer(subsampling_x, 1);
319 infer(subsampling_y, 1);
320 vp9->bit_depth = 8;
321
322 vp9->subsampling_x = current->subsampling_x;
323 vp9->subsampling_y = current->subsampling_y;
324 }
325
326 f(8, refresh_frame_flags);
327
328 CHECK(FUNC(frame_size)(ctx, rw, current));
329 CHECK(FUNC(render_size)(ctx, rw, current));
330 } else {
331 f(8, refresh_frame_flags);
332
333 for (i = 0; i < VP9_REFS_PER_FRAME; i++) {
334 fs(3, ref_frame_idx[i], 1, i);
335 fs(1, ref_frame_sign_bias[VP9_LAST_FRAME + i],
336 1, VP9_LAST_FRAME + i);
337 }
338
339 CHECK(FUNC(frame_size_with_refs)(ctx, rw, current));
340 f(1, allow_high_precision_mv);
341 CHECK(FUNC(interpolation_filter)(ctx, rw, current));
342 }
343 }
344
345 if (current->error_resilient_mode == 0) {
346 f(1, refresh_frame_context);
347 f(1, frame_parallel_decoding_mode);
348 } else {
349 infer(refresh_frame_context, 0);
350 infer(frame_parallel_decoding_mode, 1);
351 }
352
353 f(2, frame_context_idx);
354
355 CHECK(FUNC(loop_filter_params)(ctx, rw, current));
356 CHECK(FUNC(quantization_params)(ctx, rw, current));
357 CHECK(FUNC(segmentation_params)(ctx, rw, current));
358 CHECK(FUNC(tile_info)(ctx, rw, current));
359
360 f(16, header_size_in_bytes);
361
362 for (i = 0; i < VP9_NUM_REF_FRAMES; i++) {
363 if (current->refresh_frame_flags & (1 << i)) {
364 vp9->ref[i] = (VP9ReferenceFrameState) {
365 .frame_width = vp9->frame_width,
366 .frame_height = vp9->frame_height,
367 .subsampling_x = vp9->subsampling_x,
368 .subsampling_y = vp9->subsampling_y,
369 .bit_depth = vp9->bit_depth,
370 };
371 }
372 }
373
374 av_log(ctx->log_ctx, AV_LOG_DEBUG, "Frame: size %dx%d "
375 "subsample %dx%d bit_depth %d tiles %dx%d.\n",
376 vp9->frame_width, vp9->frame_height,
377 vp9->subsampling_x, vp9->subsampling_y,
378 vp9->bit_depth, 1 << current->tile_cols_log2,
379 1 << current->tile_rows_log2);
380
381 return 0;
382 }
383
FUNC(trailing_bits)384 static int FUNC(trailing_bits)(CodedBitstreamContext *ctx, RWContext *rw)
385 {
386 int err;
387 while (byte_alignment(rw) != 0)
388 fixed(1, zero_bit, 0);
389
390 return 0;
391 }
392
FUNC(frame)393 static int FUNC(frame)(CodedBitstreamContext *ctx, RWContext *rw,
394 VP9RawFrame *current)
395 {
396 int err;
397
398 HEADER("Frame");
399
400 CHECK(FUNC(uncompressed_header)(ctx, rw, ¤t->header));
401
402 CHECK(FUNC(trailing_bits)(ctx, rw));
403
404 return 0;
405 }
406
FUNC(superframe_index)407 static int FUNC(superframe_index)(CodedBitstreamContext *ctx, RWContext *rw,
408 VP9RawSuperframeIndex *current)
409 {
410 int err, i;
411
412 HEADER("Superframe Index");
413
414 f(3, superframe_marker);
415 f(2, bytes_per_framesize_minus_1);
416 f(3, frames_in_superframe_minus_1);
417
418 for (i = 0; i <= current->frames_in_superframe_minus_1; i++) {
419 // Surprise little-endian!
420 fle(8 * (current->bytes_per_framesize_minus_1 + 1),
421 frame_sizes[i], 1, i);
422 }
423
424 f(3, superframe_marker);
425 f(2, bytes_per_framesize_minus_1);
426 f(3, frames_in_superframe_minus_1);
427
428 return 0;
429 }
430