AOMedia Codec SDK
svc_encoder_rtc
1 /*
2  * Copyright (c) 2019, Alliance for Open Media. All Rights Reserved.
3  *
4  * Use of this source code is governed by a BSD-style license
5  * that can be found in the LICENSE file in the root of the source
6  * tree. An additional intellectual property rights grant can be found
7  * in the file PATENTS. All contributing project authors may
8  * be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 // This is an example demonstrating how to implement a multi-layer AOM
12 // encoding scheme for RTC video applications.
13 
14 #include <assert.h>
15 #include <math.h>
16 #include <stdio.h>
17 #include <stdlib.h>
18 #include <string.h>
19 
20 #include "aom/aom_encoder.h"
21 #include "aom/aomcx.h"
22 #include "av1/common/enums.h"
23 #include "common/tools_common.h"
24 #include "common/video_writer.h"
25 #include "aom_ports/aom_timer.h"
26 
27 #define zero(Dest) memset(&(Dest), 0, sizeof(Dest));
28 
29 static const char *exec_name;
30 
31 void usage_exit(void) { exit(EXIT_FAILURE); }
32 
33 static int mode_to_num_temporal_layers[10] = { 1, 2, 3, 3, 2, 1, 1, 3, 3, 3 };
34 static int mode_to_num_spatial_layers[10] = { 1, 1, 1, 1, 1, 2, 3, 3, 3, 3 };
35 static int mode_to_num_layers[10] = { 1, 2, 3, 3, 2, 2, 3, 9, 9, 9 };
36 
37 // For rate control encoding stats.
38 struct RateControlMetrics {
39  // Number of input frames per layer.
40  int layer_input_frames[AOM_MAX_TS_LAYERS];
41  // Number of encoded non-key frames per layer.
42  int layer_enc_frames[AOM_MAX_TS_LAYERS];
43  // Framerate per layer layer (cumulative).
44  double layer_framerate[AOM_MAX_TS_LAYERS];
45  // Target average frame size per layer (per-frame-bandwidth per layer).
46  double layer_pfb[AOM_MAX_LAYERS];
47  // Actual average frame size per layer.
48  double layer_avg_frame_size[AOM_MAX_LAYERS];
49  // Average rate mismatch per layer (|target - actual| / target).
50  double layer_avg_rate_mismatch[AOM_MAX_LAYERS];
51  // Actual encoding bitrate per layer (cumulative across temporal layers).
52  double layer_encoding_bitrate[AOM_MAX_LAYERS];
53  // Average of the short-time encoder actual bitrate.
54  // TODO(marpan): Should we add these short-time stats for each layer?
55  double avg_st_encoding_bitrate;
56  // Variance of the short-time encoder actual bitrate.
57  double variance_st_encoding_bitrate;
58  // Window (number of frames) for computing short-timee encoding bitrate.
59  int window_size;
60  // Number of window measurements.
61  int window_count;
62  int layer_target_bitrate[AOM_MAX_LAYERS];
63 };
64 
65 static int read_frame(struct AvxInputContext *input_ctx, aom_image_t *img) {
66  FILE *f = input_ctx->file;
67  y4m_input *y4m = &input_ctx->y4m;
68  int shortread = 0;
69 
70  if (input_ctx->file_type == FILE_TYPE_Y4M) {
71  if (y4m_input_fetch_frame(y4m, f, img) < 1) return 0;
72  } else {
73  shortread = read_yuv_frame(input_ctx, img);
74  }
75 
76  return !shortread;
77 }
78 
79 static int file_is_y4m(const char detect[4]) {
80  if (memcmp(detect, "YUV4", 4) == 0) {
81  return 1;
82  }
83  return 0;
84 }
85 
86 static int fourcc_is_ivf(const char detect[4]) {
87  if (memcmp(detect, "DKIF", 4) == 0) {
88  return 1;
89  }
90  return 0;
91 }
92 
93 static void close_input_file(struct AvxInputContext *input) {
94  fclose(input->file);
95  if (input->file_type == FILE_TYPE_Y4M) y4m_input_close(&input->y4m);
96 }
97 
98 static void open_input_file(struct AvxInputContext *input,
100  /* Parse certain options from the input file, if possible */
101  input->file = strcmp(input->filename, "-") ? fopen(input->filename, "rb")
102  : set_binary_mode(stdin);
103 
104  if (!input->file) fatal("Failed to open input file");
105 
106  if (!fseeko(input->file, 0, SEEK_END)) {
107  /* Input file is seekable. Figure out how long it is, so we can get
108  * progress info.
109  */
110  input->length = ftello(input->file);
111  rewind(input->file);
112  }
113 
114  /* Default to 1:1 pixel aspect ratio. */
115  input->pixel_aspect_ratio.numerator = 1;
116  input->pixel_aspect_ratio.denominator = 1;
117 
118  /* For RAW input sources, these bytes will applied on the first frame
119  * in read_frame().
120  */
121  input->detect.buf_read = fread(input->detect.buf, 1, 4, input->file);
122  input->detect.position = 0;
123 
124  if (input->detect.buf_read == 4 && file_is_y4m(input->detect.buf)) {
125  if (y4m_input_open(&input->y4m, input->file, input->detect.buf, 4, csp,
126  input->only_i420) >= 0) {
127  input->file_type = FILE_TYPE_Y4M;
128  input->width = input->y4m.pic_w;
129  input->height = input->y4m.pic_h;
130  input->pixel_aspect_ratio.numerator = input->y4m.par_n;
131  input->pixel_aspect_ratio.denominator = input->y4m.par_d;
132  input->framerate.numerator = input->y4m.fps_n;
133  input->framerate.denominator = input->y4m.fps_d;
134  input->fmt = input->y4m.aom_fmt;
135  input->bit_depth = input->y4m.bit_depth;
136  } else {
137  fatal("Unsupported Y4M stream.");
138  }
139  } else if (input->detect.buf_read == 4 && fourcc_is_ivf(input->detect.buf)) {
140  fatal("IVF is not supported as input.");
141  } else {
142  input->file_type = FILE_TYPE_RAW;
143  }
144 }
145 
146 // Note: these rate control metrics assume only 1 key frame in the
147 // sequence (i.e., first frame only). So for temporal pattern# 7
148 // (which has key frame for every frame on base layer), the metrics
149 // computation will be off/wrong.
150 // TODO(marpan): Update these metrics to account for multiple key frames
151 // in the stream.
152 static void set_rate_control_metrics(struct RateControlMetrics *rc,
153  double framerate,
154  unsigned int ss_number_layers,
155  unsigned int ts_number_layers) {
156  int ts_rate_decimator[AOM_MAX_TS_LAYERS] = { 1 };
157  ts_rate_decimator[0] = 1;
158  if (ts_number_layers == 2) {
159  ts_rate_decimator[0] = 2;
160  ts_rate_decimator[1] = 1;
161  }
162  if (ts_number_layers == 3) {
163  ts_rate_decimator[0] = 4;
164  ts_rate_decimator[1] = 2;
165  ts_rate_decimator[2] = 1;
166  }
167  // Set the layer (cumulative) framerate and the target layer (non-cumulative)
168  // per-frame-bandwidth, for the rate control encoding stats below.
169  for (unsigned int sl = 0; sl < ss_number_layers; ++sl) {
170  unsigned int i = sl * ts_number_layers;
171  rc->layer_framerate[0] = framerate / ts_rate_decimator[0];
172  rc->layer_pfb[i] =
173  1000.0 * rc->layer_target_bitrate[i] / rc->layer_framerate[0];
174  for (unsigned int tl = 0; tl < ts_number_layers; ++tl) {
175  i = sl * ts_number_layers + tl;
176  if (tl > 0) {
177  rc->layer_framerate[tl] = framerate / ts_rate_decimator[tl];
178  rc->layer_pfb[i] =
179  1000.0 *
180  (rc->layer_target_bitrate[i] - rc->layer_target_bitrate[i - 1]) /
181  (rc->layer_framerate[tl] - rc->layer_framerate[tl - 1]);
182  }
183  rc->layer_input_frames[tl] = 0;
184  rc->layer_enc_frames[tl] = 0;
185  rc->layer_encoding_bitrate[i] = 0.0;
186  rc->layer_avg_frame_size[i] = 0.0;
187  rc->layer_avg_rate_mismatch[i] = 0.0;
188  }
189  }
190  rc->window_count = 0;
191  rc->window_size = 15;
192  rc->avg_st_encoding_bitrate = 0.0;
193  rc->variance_st_encoding_bitrate = 0.0;
194 }
195 
196 static void printout_rate_control_summary(struct RateControlMetrics *rc,
197  int frame_cnt,
198  unsigned int ss_number_layers,
199  unsigned int ts_number_layers) {
200  int tot_num_frames = 0;
201  double perc_fluctuation = 0.0;
202  printf("Total number of processed frames: %d\n\n", frame_cnt - 1);
203  printf("Rate control layer stats for %d layer(s):\n\n", ts_number_layers);
204  for (unsigned int sl = 0; sl < ss_number_layers; ++sl) {
205  tot_num_frames = 0;
206  for (unsigned int tl = 0; tl < ts_number_layers; ++tl) {
207  unsigned int i = sl * ts_number_layers + tl;
208  const int num_dropped =
209  tl > 0 ? rc->layer_input_frames[tl] - rc->layer_enc_frames[tl]
210  : rc->layer_input_frames[tl] - rc->layer_enc_frames[tl] - 1;
211  tot_num_frames += rc->layer_input_frames[tl];
212  rc->layer_encoding_bitrate[i] = 0.001 * rc->layer_framerate[tl] *
213  rc->layer_encoding_bitrate[i] /
214  tot_num_frames;
215  rc->layer_avg_frame_size[i] =
216  rc->layer_avg_frame_size[i] / rc->layer_enc_frames[tl];
217  rc->layer_avg_rate_mismatch[i] =
218  100.0 * rc->layer_avg_rate_mismatch[i] / rc->layer_enc_frames[tl];
219  printf("For layer#: %d %d \n", sl, tl);
220  printf("Bitrate (target vs actual): %d %f\n", rc->layer_target_bitrate[i],
221  rc->layer_encoding_bitrate[i]);
222  printf("Average frame size (target vs actual): %f %f\n", rc->layer_pfb[i],
223  rc->layer_avg_frame_size[i]);
224  printf("Average rate_mismatch: %f\n", rc->layer_avg_rate_mismatch[i]);
225  printf(
226  "Number of input frames, encoded (non-key) frames, "
227  "and perc dropped frames: %d %d %f\n",
228  rc->layer_input_frames[tl], rc->layer_enc_frames[tl],
229  100.0 * num_dropped / rc->layer_input_frames[tl]);
230  printf("\n");
231  }
232  }
233  rc->avg_st_encoding_bitrate = rc->avg_st_encoding_bitrate / rc->window_count;
234  rc->variance_st_encoding_bitrate =
235  rc->variance_st_encoding_bitrate / rc->window_count -
236  (rc->avg_st_encoding_bitrate * rc->avg_st_encoding_bitrate);
237  perc_fluctuation = 100.0 * sqrt(rc->variance_st_encoding_bitrate) /
238  rc->avg_st_encoding_bitrate;
239  printf("Short-time stats, for window of %d frames:\n", rc->window_size);
240  printf("Average, rms-variance, and percent-fluct: %f %f %f\n",
241  rc->avg_st_encoding_bitrate, sqrt(rc->variance_st_encoding_bitrate),
242  perc_fluctuation);
243  if (frame_cnt - 1 != tot_num_frames)
244  die("Error: Number of input frames not equal to output!\n");
245 }
246 
247 // Layer pattern configuration.
248 static int set_layer_pattern(int layering_mode, int superframe_cnt,
249  aom_svc_layer_id_t *layer_id,
250  aom_svc_ref_frame_config_t *ref_frame_config,
251  int *use_svc_control, int spatial_layer_id,
252  int is_key_frame, int ksvc_mode) {
253  int i;
254  int shift = (layering_mode == 7) ? 2 : 0;
255  *use_svc_control = 1;
256  layer_id->spatial_layer_id = spatial_layer_id;
257  // Set the referende map buffer idx for the 7 references:
258  // LAST_FRAME (0), LAST2_FRAME(1), LAST3_FRAME(2), GOLDEN_FRAME(3),
259  // BWDREF_FRAME(4), ALTREF2_FRAME(5), ALTREF_FRAME(6).
260  for (i = 0; i < INTER_REFS_PER_FRAME; i++) ref_frame_config->ref_idx[i] = i;
261  for (i = 0; i < REF_FRAMES; i++) ref_frame_config->refresh[i] = 0;
262  // Note only use LAST and GF for prediction in non-rd mode (speed 8).
263  int layer_flags = AOM_EFLAG_NO_REF_LAST2 | AOM_EFLAG_NO_REF_LAST3 |
266  if (ksvc_mode) {
267  // Same pattern as case 8.
268  layering_mode = 8;
269  if (!is_key_frame)
270  // No inter-layer prediction on inter-frames.
271  layer_flags |= AOM_EFLAG_NO_REF_GF;
272  }
273  switch (layering_mode) {
274  case 0:
275  // 1-layer: update LAST on every frame, reference LAST and GF.
276  layer_id->temporal_layer_id = 0;
277  ref_frame_config->refresh[0] = 1;
278  break;
279  case 1:
280  // 2-temporal layer.
281  // 1 3 5
282  // 0 2 4
283  if (superframe_cnt % 2 == 0) {
284  layer_id->temporal_layer_id = 0;
285  // Update LAST on layer 0, reference LAST and GF.
286  ref_frame_config->refresh[0] = 1;
287  } else {
288  layer_id->temporal_layer_id = 1;
289  // No updates on layer 1, only reference LAST (TL0).
290  layer_flags |= AOM_EFLAG_NO_REF_GF;
291  }
292  break;
293  case 2:
294  // 3-temporal layer:
295  // 1 3 5 7
296  // 2 6
297  // 0 4 8
298  if (superframe_cnt % 4 == 0) {
299  // Base layer.
300  layer_id->temporal_layer_id = 0;
301  // Update LAST on layer 0, reference LAST and GF.
302  ref_frame_config->refresh[0] = 1;
303  } else if ((superframe_cnt - 1) % 4 == 0) {
304  layer_id->temporal_layer_id = 2;
305  // First top layer: no updates, only reference LAST (TL0).
306  layer_flags |= AOM_EFLAG_NO_REF_GF;
307  } else if ((superframe_cnt - 2) % 4 == 0) {
308  layer_id->temporal_layer_id = 1;
309  // Middle layer (TL1): update LAST2, only reference LAST (TL0).
310  ref_frame_config->refresh[1] = 1;
311  layer_flags |= AOM_EFLAG_NO_REF_GF;
312  } else if ((superframe_cnt - 3) % 4 == 0) {
313  layer_id->temporal_layer_id = 2;
314  // Second top layer: no updates, only reference LAST.
315  // Set buffer idx for LAST to slot 1, since that was the slot
316  // updated in previous frame. So LAST is TL1 frame.
317  ref_frame_config->ref_idx[0] = 1;
318  ref_frame_config->ref_idx[1] = 0;
319  layer_flags |= AOM_EFLAG_NO_REF_GF;
320  }
321  break;
322  case 3:
323  // 3-temporal layer: but middle layer updates GF, so 2nd TL2 will
324  // only reference GF (not LAST). Other frames only reference LAST.
325  // 1 3 5 7
326  // 2 6
327  // 0 4 8
328  if (superframe_cnt % 4 == 0) {
329  // Base layer.
330  layer_id->temporal_layer_id = 0;
331  // Update LAST on layer 0, only reference LAST.
332  ref_frame_config->refresh[0] = 1;
333  layer_flags |= AOM_EFLAG_NO_REF_GF;
334  } else if ((superframe_cnt - 1) % 4 == 0) {
335  layer_id->temporal_layer_id = 2;
336  // First top layer: no updates, only reference LAST (TL0).
337  layer_flags |= AOM_EFLAG_NO_REF_GF;
338  } else if ((superframe_cnt - 2) % 4 == 0) {
339  layer_id->temporal_layer_id = 1;
340  // Middle layer (TL1): update GF, only reference LAST (TL0).
341  ref_frame_config->refresh[3] = 1;
342  layer_flags |= AOM_EFLAG_NO_REF_GF;
343  } else if ((superframe_cnt - 3) % 4 == 0) {
344  layer_id->temporal_layer_id = 2;
345  // Second top layer: no updates, only reference GF.
346  layer_flags |= AOM_EFLAG_NO_REF_LAST;
347  }
348  break;
349  case 4:
350  // 2-temporla layer with the old update flags, not with the new
351  // SVC control.
352  *use_svc_control = 0;
353  // 1 3 5
354  // 0 2 4
355  if (superframe_cnt % 2 == 0) {
356  layer_id->temporal_layer_id = 0;
357  // Update LAST on layer 0, reference LAST and GF.
358  layer_flags |= AOM_EFLAG_NO_UPD_GF | AOM_EFLAG_NO_UPD_ARF;
359  } else {
360  layer_id->temporal_layer_id = 1;
361  // No updates on layer 1, only reference LAST (TL0).
362  layer_flags |= AOM_EFLAG_NO_UPD_LAST | AOM_EFLAG_NO_UPD_GF |
364  }
365  break;
366  case 5:
367  // 2 spatial layers, 1 temporal.
368  layer_id->temporal_layer_id = 0;
369  if (layer_id->spatial_layer_id == 0) {
370  // Reference LAST, update LAST.
371  ref_frame_config->refresh[0] = 1;
372  layer_flags |= AOM_EFLAG_NO_REF_GF;
373  } else if (layer_id->spatial_layer_id == 1) {
374  // Reference LAST and GOLDEN. Set buffer_idx for LAST to slot 1
375  // and GOLDEN to slot 0. Update slot 1 (LAST).
376  ref_frame_config->ref_idx[0] = 1;
377  ref_frame_config->ref_idx[3] = 0;
378  ref_frame_config->refresh[1] = 1;
379  }
380  break;
381  case 6:
382  // 3 spatial layers, 1 temporal.
383  // Note for this case, we set the buffer idx for all references to be
384  // either LAST or GOLDEN, which are always valid references, since decoder
385  // will check if any of the 7 references is valid scale in
386  // valid_ref_frame_size().
387  layer_id->temporal_layer_id = 0;
388  if (layer_id->spatial_layer_id == 0) {
389  // Reference LAST, update LAST. Set all buffer_idx to 0.
390  for (i = 0; i < INTER_REFS_PER_FRAME; i++)
391  ref_frame_config->ref_idx[i] = 0;
392  ref_frame_config->refresh[0] = 1;
393  layer_flags |= AOM_EFLAG_NO_REF_GF;
394  } else if (layer_id->spatial_layer_id == 1) {
395  // Reference LAST and GOLDEN. Set buffer_idx for LAST to slot 1
396  // and GOLDEN (and all other refs) to slot 0.
397  // Update slot 1 (LAST).
398  for (i = 0; i < INTER_REFS_PER_FRAME; i++)
399  ref_frame_config->ref_idx[i] = 0;
400  ref_frame_config->ref_idx[0] = 1;
401  ref_frame_config->refresh[1] = 1;
402  } else if (layer_id->spatial_layer_id == 2) {
403  // Reference LAST and GOLDEN. Set buffer_idx for LAST to slot 2
404  // and GOLDEN (and all other refs) to slot 1.
405  // Update slot 2 (LAST).
406  for (i = 0; i < INTER_REFS_PER_FRAME; i++)
407  ref_frame_config->ref_idx[i] = 1;
408  ref_frame_config->ref_idx[0] = 2;
409  ref_frame_config->refresh[2] = 1;
410  }
411  break;
412  case 7:
413  // 3 spatial and 3 temporal layer.
414  // Same as case 8 but overalap in the buffer slot updates.
415  // (shift = 2). The slots 3 and 4 updated by first TL2 are
416  // reused for update in TL1 superframe.
417  // Note for this case, frame order hint must be disabled for
418  // lower resolutios (operating points > 0) to be decoedable.
419  case 8:
420  // 3 spatial and 3 temporal layer.
421  // No overlap in buffer updates between TL2 and TL1.
422  // TL2 updates slot 3 and 4, TL1 updates 5, 6, 7.
423  if (superframe_cnt % 4 == 0) {
424  // Base temporal layer.
425  layer_id->temporal_layer_id = 0;
426  if (layer_id->spatial_layer_id == 0) {
427  // Reference LAST, update LAST.
428  // Set all buffer_idx to 0.
429  for (i = 0; i < INTER_REFS_PER_FRAME; i++)
430  ref_frame_config->ref_idx[i] = 0;
431  ref_frame_config->refresh[0] = 1;
432  layer_flags |= AOM_EFLAG_NO_REF_GF;
433  } else if (layer_id->spatial_layer_id == 1) {
434  // Reference LAST and GOLDEN. Set buffer_idx for LAST to slot 1,
435  // GOLDEN (and all other refs) to slot 0.
436  // Update slot 1 (LAST).
437  for (i = 0; i < INTER_REFS_PER_FRAME; i++)
438  ref_frame_config->ref_idx[i] = 0;
439  ref_frame_config->ref_idx[0] = 1;
440  ref_frame_config->refresh[1] = 1;
441  } else if (layer_id->spatial_layer_id == 2) {
442  // Reference LAST and GOLDEN. Set buffer_idx for LAST to slot 2,
443  // GOLDEN (and all other refs) to slot 1.
444  // Update slot 2 (LAST).
445  for (i = 0; i < INTER_REFS_PER_FRAME; i++)
446  ref_frame_config->ref_idx[i] = 1;
447  ref_frame_config->ref_idx[0] = 2;
448  ref_frame_config->refresh[2] = 1;
449  }
450  } else if ((superframe_cnt - 1) % 4 == 0) {
451  // First top temporal enhancement layer.
452  layer_id->temporal_layer_id = 2;
453  if (layer_id->spatial_layer_id == 0) {
454  // Reference LAST (slot 0).
455  // Set GOLDEN to slot 3 and update slot 3.
456  // Set all other buffer_idx to slot 0.
457  for (i = 0; i < INTER_REFS_PER_FRAME; i++)
458  ref_frame_config->ref_idx[i] = 0;
459  ref_frame_config->ref_idx[3] = 3;
460  ref_frame_config->refresh[3] = 1;
461  layer_flags |= AOM_EFLAG_NO_REF_GF;
462  } else if (layer_id->spatial_layer_id == 1) {
463  // Reference LAST and GOLDEN. Set buffer_idx for LAST to slot 1,
464  // GOLDEN (and all other refs) to slot 3.
465  // Set LAST2 to slot 4 and Update slot 4.
466  for (i = 0; i < INTER_REFS_PER_FRAME; i++)
467  ref_frame_config->ref_idx[i] = 3;
468  ref_frame_config->ref_idx[0] = 1;
469  ref_frame_config->ref_idx[1] = 4;
470  ref_frame_config->refresh[4] = 1;
471  } else if (layer_id->spatial_layer_id == 2) {
472  // Reference LAST and GOLDEN. Set buffer_idx for LAST to slot 2,
473  // GOLDEN (and all other refs) to slot 4.
474  // No update.
475  for (i = 0; i < INTER_REFS_PER_FRAME; i++)
476  ref_frame_config->ref_idx[i] = 4;
477  ref_frame_config->ref_idx[0] = 2;
478  }
479  } else if ((superframe_cnt - 2) % 4 == 0) {
480  // Middle temporal enhancement layer.
481  layer_id->temporal_layer_id = 1;
482  if (layer_id->spatial_layer_id == 0) {
483  // Reference LAST.
484  // Set all buffer_idx to 0.
485  // Set GOLDEN to slot 5 and update slot 5.
486  for (i = 0; i < INTER_REFS_PER_FRAME; i++)
487  ref_frame_config->ref_idx[i] = 0;
488  ref_frame_config->ref_idx[3] = 5 - shift;
489  ref_frame_config->refresh[5 - shift] = 1;
490  layer_flags |= AOM_EFLAG_NO_REF_GF;
491  } else if (layer_id->spatial_layer_id == 1) {
492  // Reference LAST and GOLDEN. Set buffer_idx for LAST to slot 1,
493  // GOLDEN (and all other refs) to slot 5.
494  // Set LAST2 to slot 6 and update slot 6.
495  for (i = 0; i < INTER_REFS_PER_FRAME; i++)
496  ref_frame_config->ref_idx[i] = 5 - shift;
497  ref_frame_config->ref_idx[0] = 1;
498  ref_frame_config->ref_idx[2] = 6 - shift;
499  ref_frame_config->refresh[6 - shift] = 1;
500  } else if (layer_id->spatial_layer_id == 2) {
501  // Reference LAST and GOLDEN. Set buffer_idx for LAST to slot 2,
502  // GOLDEN (and all other refs) to slot 6.
503  // Set LAST2 to slot 6 and update slot 7.
504  for (i = 0; i < INTER_REFS_PER_FRAME; i++)
505  ref_frame_config->ref_idx[i] = 6 - shift;
506  ref_frame_config->ref_idx[0] = 2;
507  ref_frame_config->ref_idx[2] = 7 - shift;
508  ref_frame_config->refresh[7 - shift] = 1;
509  }
510  } else if ((superframe_cnt - 3) % 4 == 0) {
511  // Second top temporal enhancement layer.
512  layer_id->temporal_layer_id = 2;
513  if (layer_id->spatial_layer_id == 0) {
514  // Set LAST to slot 5 and reference LAST.
515  // Set GOLDEN to slot 3 and update slot 3.
516  // Set all other buffer_idx to 0.
517  for (i = 0; i < INTER_REFS_PER_FRAME; i++)
518  ref_frame_config->ref_idx[i] = 0;
519  ref_frame_config->ref_idx[0] = 5 - shift;
520  ref_frame_config->ref_idx[3] = 3;
521  ref_frame_config->refresh[3] = 1;
522  layer_flags |= AOM_EFLAG_NO_REF_GF;
523  } else if (layer_id->spatial_layer_id == 1) {
524  // Reference LAST and GOLDEN. Set buffer_idx for LAST to slot 6,
525  // GOLDEN to slot 3. Set LAST2 to slot 4 and update slot 4.
526  for (i = 0; i < INTER_REFS_PER_FRAME; i++)
527  ref_frame_config->ref_idx[i] = 0;
528  ref_frame_config->ref_idx[0] = 6 - shift;
529  ref_frame_config->ref_idx[3] = 3;
530  ref_frame_config->ref_idx[1] = 4;
531  ref_frame_config->refresh[4] = 1;
532  } else if (layer_id->spatial_layer_id == 2) {
533  // Reference LAST and GOLDEN. Set buffer_idx for LAST to slot 7,
534  // GOLDEN to slot 4. No update.
535  for (i = 0; i < INTER_REFS_PER_FRAME; i++)
536  ref_frame_config->ref_idx[i] = 0;
537  ref_frame_config->ref_idx[0] = 7 - shift;
538  ref_frame_config->ref_idx[3] = 4;
539  }
540  }
541  break;
542  default: assert(0); die("Error: Unsupported temporal layering mode!\n");
543  }
544  return layer_flags;
545 }
546 
547 int main(int argc, char **argv) {
548  AvxVideoWriter *outfile[AOM_MAX_LAYERS] = { NULL };
549  aom_codec_ctx_t codec;
551  int frame_cnt = 0;
552  aom_image_t raw;
553  aom_codec_err_t res;
554  unsigned int width;
555  unsigned int height;
556  uint32_t error_resilient = 0;
557  int speed;
558  int frame_avail;
559  int got_data = 0;
560  int flags = 0;
561  unsigned i;
562  int pts = 0; // PTS starts at 0.
563  int frame_duration = 1; // 1 timebase tick per frame.
564  int layering_mode = 0;
565  aom_svc_layer_id_t layer_id;
566  aom_svc_params_t svc_params;
567  aom_svc_ref_frame_config_t ref_frame_config;
568  const AvxInterface *encoder = NULL;
569  struct AvxInputContext input_ctx;
570  struct RateControlMetrics rc;
571  int64_t cx_time = 0;
572  const int min_args_base = 13;
573  const int min_args = min_args_base;
574  double sum_bitrate = 0.0;
575  double sum_bitrate2 = 0.0;
576  double framerate = 30.0;
577  int use_svc_control = 1;
578  zero(rc.layer_target_bitrate);
579  memset(&layer_id, 0, sizeof(aom_svc_layer_id_t));
580  memset(&input_ctx, 0, sizeof(input_ctx));
581  memset(&svc_params, 0, sizeof(svc_params));
582 
583  /* Setup default input stream settings */
584  input_ctx.framerate.numerator = 30;
585  input_ctx.framerate.denominator = 1;
586  input_ctx.only_i420 = 1;
587  input_ctx.bit_depth = 0;
588  unsigned int ts_number_layers = 1;
589  unsigned int ss_number_layers = 1;
590  exec_name = argv[0];
591  // Check usage and arguments.
592  if (argc < min_args) {
593  die("Usage: %s <infile> <outfile> <codec_type(av1)> <width> <height> "
594  "<rate_num> <rate_den> <speed> <frame_drop_threshold> "
595  "<error_resilient> <threads> <mode> "
596  "<Rate_0> ... <Rate_nlayers-1>\n",
597  argv[0]);
598  }
599 
600  encoder = get_aom_encoder_by_name(argv[3]);
601 
602  width = (unsigned int)strtoul(argv[4], NULL, 0);
603  height = (unsigned int)strtoul(argv[5], NULL, 0);
604  if (width < 16 || width % 2 || height < 16 || height % 2) {
605  die("Invalid resolution: %d x %d", width, height);
606  }
607 
608  layering_mode = (int)strtol(argv[12], NULL, 0);
609  if (layering_mode < 0 || layering_mode > 13) {
610  die("Invalid layering mode (0..12) %s", argv[12]);
611  }
612 
613  if (argc != min_args + mode_to_num_layers[layering_mode]) {
614  die("Invalid number of arguments");
615  }
616 
617  ts_number_layers = mode_to_num_temporal_layers[layering_mode];
618  ss_number_layers = mode_to_num_spatial_layers[layering_mode];
619 
620  input_ctx.filename = argv[1];
621  open_input_file(&input_ctx, 0);
622 
623  // Y4M reader has its own allocation.
624  if (input_ctx.file_type != FILE_TYPE_Y4M) {
625  if (!aom_img_alloc(&raw, AOM_IMG_FMT_I420, width, height, 32)) {
626  die("Failed to allocate image", width, height);
627  }
628  }
629 
630  // Populate encoder configuration.
631  res = aom_codec_enc_config_default(encoder->codec_interface(), &cfg, 0);
632  if (res) {
633  printf("Failed to get config: %s\n", aom_codec_err_to_string(res));
634  return EXIT_FAILURE;
635  }
636 
637  // Update the default configuration with our settings.
638  cfg.g_w = width;
639  cfg.g_h = height;
640 
641  // Timebase format e.g. 30fps: numerator=1, demoninator = 30.
642  cfg.g_timebase.num = (int)strtol(argv[6], NULL, 0);
643  cfg.g_timebase.den = (int)strtol(argv[7], NULL, 0);
644 
645  speed = (int)strtol(argv[8], NULL, 0);
646  if (speed < 0 || speed > 8) {
647  die("Invalid speed setting: must be positive");
648  }
649 
650  for (i = min_args_base;
651  (int)i < min_args_base + mode_to_num_layers[layering_mode]; ++i) {
652  rc.layer_target_bitrate[i - 13] = (int)strtol(argv[i], NULL, 0);
653  svc_params.layer_target_bitrate[i - 13] = rc.layer_target_bitrate[i - 13];
654  }
655 
656  cfg.rc_target_bitrate =
657  svc_params.layer_target_bitrate[ss_number_layers * ts_number_layers - 1];
658 
659  svc_params.framerate_factor[0] = 1;
660  if (ts_number_layers == 2) {
661  svc_params.framerate_factor[0] = 2;
662  svc_params.framerate_factor[1] = 1;
663  } else if (ts_number_layers == 3) {
664  svc_params.framerate_factor[0] = 4;
665  svc_params.framerate_factor[1] = 2;
666  svc_params.framerate_factor[2] = 1;
667  }
668 
669  // Real time parameters.
671 
672  cfg.rc_dropframe_thresh = (unsigned int)strtoul(argv[9], NULL, 0);
673  cfg.rc_end_usage = AOM_CBR;
674  cfg.rc_min_quantizer = 2;
675  cfg.rc_max_quantizer = 52;
676  cfg.rc_undershoot_pct = 50;
677  cfg.rc_overshoot_pct = 50;
678  cfg.rc_buf_initial_sz = 600;
679  cfg.rc_buf_optimal_sz = 600;
680  cfg.rc_buf_sz = 1000;
681 
682  // Use 1 thread as default.
683  cfg.g_threads = (unsigned int)strtoul(argv[11], NULL, 0);
684 
685  error_resilient = (uint32_t)strtoul(argv[10], NULL, 0);
686  if (error_resilient != 0 && error_resilient != 1) {
687  die("Invalid value for error resilient (0, 1): %d.", error_resilient);
688  }
689  // Enable error resilient mode.
690  cfg.g_error_resilient = error_resilient;
691  cfg.g_lag_in_frames = 0;
692  cfg.kf_mode = AOM_KF_AUTO;
693 
694  // Disable automatic keyframe placement.
695  cfg.kf_min_dist = cfg.kf_max_dist = 3000;
696 
697  framerate = cfg.g_timebase.den / cfg.g_timebase.num;
698  set_rate_control_metrics(&rc, framerate, ss_number_layers, ts_number_layers);
699 
700  if (input_ctx.file_type == FILE_TYPE_Y4M) {
701  if (input_ctx.width != cfg.g_w || input_ctx.height != cfg.g_h) {
702  die("Incorrect width or height: %d x %d", cfg.g_w, cfg.g_h);
703  }
704  if (input_ctx.framerate.numerator != cfg.g_timebase.den ||
705  input_ctx.framerate.denominator != cfg.g_timebase.num) {
706  die("Incorrect framerate: numerator %d denominator %d",
707  cfg.g_timebase.num, cfg.g_timebase.den);
708  }
709  }
710 
711  // Open an output file for each stream.
712  for (unsigned int sl = 0; sl < ss_number_layers; ++sl) {
713  for (unsigned tl = 0; tl < ts_number_layers; ++tl) {
714  i = sl * ts_number_layers + tl;
715  char file_name[PATH_MAX];
716  AvxVideoInfo info;
717  info.codec_fourcc = encoder->fourcc;
718  info.frame_width = cfg.g_w;
719  info.frame_height = cfg.g_h;
720  info.time_base.numerator = cfg.g_timebase.num;
721  info.time_base.denominator = cfg.g_timebase.den;
722 
723  snprintf(file_name, sizeof(file_name), "%s_%d.av1", argv[2], i);
724  outfile[i] = aom_video_writer_open(file_name, kContainerIVF, &info);
725  if (!outfile[i]) die("Failed to open %s for writing", file_name);
726  assert(outfile[i] != NULL);
727  }
728  }
729 
730  // Initialize codec.
731  if (aom_codec_enc_init(&codec, encoder->codec_interface(), &cfg, 0))
732  die_codec(&codec, "Failed to initialize encoder");
733 
734  aom_codec_control(&codec, AOME_SET_CPUUSED, speed);
741 
742  svc_params.number_spatial_layers = ss_number_layers;
743  svc_params.number_temporal_layers = ts_number_layers;
744  for (i = 0; i < ss_number_layers * ts_number_layers; ++i) {
745  svc_params.max_quantizers[i] = cfg.rc_max_quantizer;
746  svc_params.min_quantizers[i] = cfg.rc_min_quantizer;
747  }
748  for (i = 0; i < ss_number_layers; ++i) {
749  svc_params.scaling_factor_num[i] = 1;
750  svc_params.scaling_factor_den[i] = 1;
751  }
752  if (ss_number_layers == 2) {
753  svc_params.scaling_factor_num[0] = 1;
754  svc_params.scaling_factor_den[0] = 2;
755  } else if (ss_number_layers == 3) {
756  svc_params.scaling_factor_num[0] = 1;
757  svc_params.scaling_factor_den[0] = 4;
758  svc_params.scaling_factor_num[1] = 1;
759  svc_params.scaling_factor_den[1] = 2;
760  }
761 
762  aom_codec_control(&codec, AV1E_SET_SVC_PARAMS, &svc_params);
763 
764  // This controls the maximum target size of the key frame.
765  // For generating smaller key frames, use a smaller max_intra_size_pct
766  // value, like 100 or 200.
767  {
768  const int max_intra_size_pct = 300;
770  max_intra_size_pct);
771  }
772 
773  frame_avail = 1;
774  while (frame_avail || got_data) {
775  struct aom_usec_timer timer;
776  frame_avail = read_frame(&input_ctx, &raw);
777  int is_key_frame = (frame_cnt % cfg.kf_max_dist) == 0;
778  // Loop over spatial layers.
779  for (unsigned int slx = 0; slx < ss_number_layers; slx++) {
780  aom_codec_iter_t iter = NULL;
781  const aom_codec_cx_pkt_t *pkt;
782  int layer = 0;
783 
784  // Set the reference/update flags, layer_id, and reference_map
785  // buffer index.
786  flags = set_layer_pattern(layering_mode, frame_cnt, &layer_id,
787  &ref_frame_config, &use_svc_control, slx,
788  is_key_frame, (layering_mode == 9));
789  aom_codec_control(&codec, AV1E_SET_SVC_LAYER_ID, &layer_id);
790  if (use_svc_control)
792  &ref_frame_config);
793 
794  layer = slx * ts_number_layers + layer_id.temporal_layer_id;
795  if (frame_avail && slx == 0) ++rc.layer_input_frames[layer];
796 
797  // Do the layer encode.
798  aom_usec_timer_start(&timer);
799  if (aom_codec_encode(&codec, frame_avail ? &raw : NULL, pts, 1, flags))
800  die_codec(&codec, "Failed to encode frame");
801  aom_usec_timer_mark(&timer);
802  cx_time += aom_usec_timer_elapsed(&timer);
803 
804  got_data = 0;
805  while ((pkt = aom_codec_get_cx_data(&codec, &iter))) {
806  got_data = 1;
807  switch (pkt->kind) {
809  for (unsigned int sl = layer_id.spatial_layer_id;
810  sl < ss_number_layers; ++sl) {
811  for (unsigned tl = layer_id.temporal_layer_id;
812  tl < ts_number_layers; ++tl) {
813  unsigned int j = sl * ts_number_layers + tl;
814  aom_video_writer_write_frame(outfile[j], pkt->data.frame.buf,
815  pkt->data.frame.sz, pts);
816  if (sl == (unsigned int)layer_id.spatial_layer_id)
817  rc.layer_encoding_bitrate[j] += 8.0 * pkt->data.frame.sz;
818  // Keep count of rate control stats per layer (for non-key).
819  if (tl == (unsigned int)layer_id.temporal_layer_id &&
820  sl == (unsigned int)layer_id.spatial_layer_id &&
821  !(pkt->data.frame.flags & AOM_FRAME_IS_KEY)) {
822  rc.layer_avg_frame_size[j] += 8.0 * pkt->data.frame.sz;
823  rc.layer_avg_rate_mismatch[j] +=
824  fabs(8.0 * pkt->data.frame.sz - rc.layer_pfb[j]) /
825  rc.layer_pfb[j];
826  if (slx == 0) ++rc.layer_enc_frames[tl];
827  }
828  }
829  }
830 
831  // Update for short-time encoding bitrate states, for moving window
832  // of size rc->window, shifted by rc->window / 2.
833  // Ignore first window segment, due to key frame.
834  // For spatial layers: only do this for top/highest SL.
835  if (frame_cnt > rc.window_size && slx == ss_number_layers - 1) {
836  sum_bitrate += 0.001 * 8.0 * pkt->data.frame.sz * framerate;
837  rc.window_size = (rc.window_size <= 0) ? 1 : rc.window_size;
838  if (frame_cnt % rc.window_size == 0) {
839  rc.window_count += 1;
840  rc.avg_st_encoding_bitrate += sum_bitrate / rc.window_size;
841  rc.variance_st_encoding_bitrate +=
842  (sum_bitrate / rc.window_size) *
843  (sum_bitrate / rc.window_size);
844  sum_bitrate = 0.0;
845  }
846  }
847  // Second shifted window.
848  if (frame_cnt > rc.window_size + rc.window_size / 2 &&
849  slx == ss_number_layers - 1) {
850  sum_bitrate2 += 0.001 * 8.0 * pkt->data.frame.sz * framerate;
851  if (frame_cnt > 2 * rc.window_size &&
852  frame_cnt % rc.window_size == 0) {
853  rc.window_count += 1;
854  rc.avg_st_encoding_bitrate += sum_bitrate2 / rc.window_size;
855  rc.variance_st_encoding_bitrate +=
856  (sum_bitrate2 / rc.window_size) *
857  (sum_bitrate2 / rc.window_size);
858  sum_bitrate2 = 0.0;
859  }
860  }
861  break;
862  default: break;
863  }
864  }
865  } // loop over spatial layers
866  ++frame_cnt;
867  pts += frame_duration;
868  }
869  close_input_file(&input_ctx);
870  printout_rate_control_summary(&rc, frame_cnt, ss_number_layers,
871  ts_number_layers);
872  printf("\n");
873  printf("Frame cnt and encoding time/FPS stats for encoding: %d %f %f\n",
874  frame_cnt, 1000 * (float)cx_time / (double)(frame_cnt * 1000000),
875  1000000 * (double)frame_cnt / (double)cx_time);
876 
877  if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec");
878 
879  // Try to rewrite the output file headers with the actual frame count.
880  for (i = 0; i < ss_number_layers * ts_number_layers; ++i)
881  aom_video_writer_close(outfile[i]);
882 
883  if (input_ctx.file_type != FILE_TYPE_Y4M) {
884  aom_img_free(&raw);
885  }
886  return EXIT_SUCCESS;
887 }
Describes the encoder algorithm interface to applications.
enum aom_chroma_sample_position aom_chroma_sample_position_t
List of chroma sample positions.
aom_image_t * aom_img_alloc(aom_image_t *img, aom_img_fmt_t fmt, unsigned int d_w, unsigned int d_h, unsigned int align)
Open a descriptor, allocating storage for the underlying image.
@ AOM_IMG_FMT_I420
Definition: aom_image.h:45
void aom_img_free(aom_image_t *img)
Close an image descriptor.
Provides definitions for using AOM or AV1 encoder algorithm within the aom Codec Interface.
#define AOM_MAX_LAYERS
Definition: aomcx.h:1269
#define AOM_EFLAG_NO_UPD_ARF
Don't update the alternate reference frame.
Definition: aomcx.h:114
#define AOM_EFLAG_NO_REF_LAST2
Don't reference the last2 frame.
Definition: aomcx.h:57
#define AOM_MAX_TS_LAYERS
Definition: aomcx.h:1271
#define AOM_EFLAG_NO_REF_BWD
Don't reference the bwd reference frame.
Definition: aomcx.h:86
#define AOM_EFLAG_NO_UPD_LAST
Don't update the last frame.
Definition: aomcx.h:100
#define AOM_EFLAG_NO_REF_ARF
Don't reference the alternate reference frame.
Definition: aomcx.h:79
#define AOM_EFLAG_NO_REF_LAST3
Don't reference the last3 frame.
Definition: aomcx.h:64
#define AOM_EFLAG_NO_UPD_GF
Don't update the golden frame.
Definition: aomcx.h:107
#define AOM_EFLAG_NO_REF_GF
Don't reference the golden frame.
Definition: aomcx.h:71
#define AOM_EFLAG_NO_REF_ARF2
Don't reference the alt2 reference frame.
Definition: aomcx.h:93
#define AOM_EFLAG_NO_REF_LAST
Don't reference the last frame.
Definition: aomcx.h:50
@ AV1E_SET_ENABLE_TPL_MODEL
Codec control function to enable RDO modulated by frame temporal dependency.
Definition: aomcx.h:339
@ AV1E_SET_AQ_MODE
Codec control function to set adaptive quantization mode.
Definition: aomcx.h:388
@ AV1E_SET_SVC_LAYER_ID
Codec control function to set the layer id.
Definition: aomcx.h:1170
@ AV1E_SET_SVC_REF_FRAME_CONFIG
Codec control function to set reference frame config: the ref_idx and the refresh flags for each buff...
Definition: aomcx.h:1179
@ AV1E_SET_ENABLE_CDEF
Codec control function to encode with CDEF.
Definition: aomcx.h:579
@ AV1E_SET_SVC_PARAMS
Codec control function to set SVC paramaeters.
Definition: aomcx.h:1174
@ AOME_SET_MAX_INTRA_BITRATE_PCT
Codec control function to set Max data rate for Intra frames.
Definition: aomcx.h:248
@ AV1E_SET_ENABLE_ORDER_HINT
Codec control function to turn on / off frame order hint for a few tools:
Definition: aomcx.h:816
@ AV1E_SET_DELTAQ_MODE
Codec control function to set the delta q mode.
Definition: aomcx.h:1045
@ AOME_SET_CPUUSED
Codec control function to set encoder internal speed settings.
Definition: aomcx.h:184
@ AV1E_SET_GF_CBR_BOOST_PCT
Boost percentage for Golden Frame in CBR mode.
Definition: aomcx.h:278
#define aom_codec_control(ctx, id, data)
aom_codec_control wrapper macro
Definition: aom_codec.h:421
const char * aom_codec_err_to_string(aom_codec_err_t err)
Convert error number to printable string.
aom_codec_err_t aom_codec_destroy(aom_codec_ctx_t *ctx)
Destroy a codec instance.
aom_codec_err_t
Algorithm return codes.
Definition: aom_codec.h:101
const void * aom_codec_iter_t
Iterator.
Definition: aom_codec.h:201
aom_codec_err_t aom_codec_encode(aom_codec_ctx_t *ctx, const aom_image_t *img, aom_codec_pts_t pts, unsigned long duration, aom_enc_frame_flags_t flags)
Encode a frame.
#define aom_codec_enc_init(ctx, iface, cfg, flags)
Convenience macro for aom_codec_enc_init_ver()
Definition: aom_encoder.h:905
aom_codec_err_t aom_codec_enc_config_default(aom_codec_iface_t *iface, aom_codec_enc_cfg_t *cfg, unsigned int reserved)
Get a default configuration.
#define AOM_USAGE_REALTIME
usage parameter analogous to AV1 REALTIME mode.
Definition: aom_encoder.h:1008
const aom_codec_cx_pkt_t * aom_codec_get_cx_data(aom_codec_ctx_t *ctx, aom_codec_iter_t *iter)
Encoded data iterator.
#define AOM_FRAME_IS_KEY
Definition: aom_encoder.h:89
@ AOM_CBR
Definition: aom_encoder.h:186
@ AOM_KF_AUTO
Definition: aom_encoder.h:201
@ AOM_CODEC_CX_FRAME_PKT
Definition: aom_encoder.h:119
Codec context structure.
Definition: aom_codec.h:211
Encoder output packet.
Definition: aom_encoder.h:131
enum aom_codec_cx_pkt_kind kind
Definition: aom_encoder.h:132
union aom_codec_cx_pkt::@1 data
struct aom_codec_cx_pkt::@1::@2 frame
Encoder configuration structure.
Definition: aom_encoder.h:369
unsigned int rc_dropframe_thresh
Temporal resampling configuration, if supported by the codec.
Definition: aom_encoder.h:517
struct aom_rational g_timebase
Stream timebase units.
Definition: aom_encoder.h:466
unsigned int g_usage
Algorithm specific "usage" value.
Definition: aom_encoder.h:381
unsigned int rc_buf_sz
Decoder Buffer Size.
Definition: aom_encoder.h:689
unsigned int g_h
Height of the frame.
Definition: aom_encoder.h:417
enum aom_kf_mode kf_mode
Keyframe placement mode.
Definition: aom_encoder.h:752
enum aom_rc_mode rc_end_usage
Rate control algorithm to use.
Definition: aom_encoder.h:602
unsigned int g_threads
Maximum number of threads to use.
Definition: aom_encoder.h:389
unsigned int kf_min_dist
Keyframe minimum interval.
Definition: aom_encoder.h:761
unsigned int g_lag_in_frames
Allow lagged encoding.
Definition: aom_encoder.h:495
unsigned int rc_buf_initial_sz
Decoder Buffer Initial Size.
Definition: aom_encoder.h:698
unsigned int g_w
Width of the frame.
Definition: aom_encoder.h:408
unsigned int rc_undershoot_pct
Rate control adaptation undershoot control.
Definition: aom_encoder.h:662
unsigned int kf_max_dist
Keyframe maximum interval.
Definition: aom_encoder.h:770
aom_codec_er_flags_t g_error_resilient
Enable error resilient modes.
Definition: aom_encoder.h:474
unsigned int rc_max_quantizer
Maximum (Worst Quality) Quantizer.
Definition: aom_encoder.h:646
unsigned int rc_buf_optimal_sz
Decoder Buffer Optimal Size.
Definition: aom_encoder.h:707
unsigned int rc_min_quantizer
Minimum (Best Quality) Quantizer.
Definition: aom_encoder.h:636
unsigned int rc_target_bitrate
Target data rate.
Definition: aom_encoder.h:622
unsigned int rc_overshoot_pct
Rate control adaptation overshoot control.
Definition: aom_encoder.h:674
Image Descriptor.
Definition: aom_image.h:151
int num
Definition: aom_encoder.h:172
int den
Definition: aom_encoder.h:173
Definition: aomcx.h:1274
int temporal_layer_id
Definition: aomcx.h:1276
int spatial_layer_id
Definition: aomcx.h:1275
Definition: aomcx.h:1280
int max_quantizers[32]
Definition: aomcx.h:1283
int number_spatial_layers
Definition: aomcx.h:1281
int layer_target_bitrate[32]
Definition: aomcx.h:1288
int framerate_factor[8]
Definition: aomcx.h:1290
int min_quantizers[32]
Definition: aomcx.h:1284
int scaling_factor_den[4]
Definition: aomcx.h:1286
int number_temporal_layers
Definition: aomcx.h:1282
int scaling_factor_num[4]
Definition: aomcx.h:1285
Definition: aomcx.h:1294
int refresh[8]
Definition: aomcx.h:1299
int ref_idx[7]
Definition: aomcx.h:1298