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1 /*
2  * Copyright (c) 2016, Alliance for Open Media. All rights reserved
3  *
4  * This source code is subject to the terms of the BSD 2 Clause License and
5  * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6  * was not distributed with this source code in the LICENSE file, you can
7  * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8  * Media Patent License 1.0 was not distributed with this source code in the
9  * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10  */
11 
12 #include "av1/common/timing.h"
13 
14 /* Tables for AV1 max bitrates for different levels of main and high tier.
15  * The tables are in Kbps instead of Mbps in the specification.
16  * Note that depending on the profile, a multiplier is needed.
17  */
18 #define UNDEFINED_RATE \
19   (1 << 21)  // Placeholder rate for levels with undefined rate
20 #define INVALID_RATE \
21   (0)  // For invalid profile-level configuration, set rate to 0
22 
23 /* Max Bitrates for levels of Main Tier in kbps. Bitrate in main_kbps [31] */
24 /* is a dummy value. The decoder model is not applicable for level 31. */
25 static int32_t main_kbps[1 << LEVEL_BITS] = {
26   1500,           3000,           UNDEFINED_RATE, UNDEFINED_RATE,
27   6000,           10000,          UNDEFINED_RATE, UNDEFINED_RATE,
28   12000,          20000,          UNDEFINED_RATE, UNDEFINED_RATE,
29   30000,          40000,          60000,          60000,
30   60000,          100000,         160000,         160000,
31   UNDEFINED_RATE, UNDEFINED_RATE, UNDEFINED_RATE, UNDEFINED_RATE,
32   UNDEFINED_RATE, UNDEFINED_RATE, UNDEFINED_RATE, UNDEFINED_RATE,
33   UNDEFINED_RATE, UNDEFINED_RATE, UNDEFINED_RATE, UNDEFINED_RATE
34 };
35 
36 /* Max Bitrates for levels of High Tier in kbps. Bitrate in high_kbps [31] */
37 /* is a dummy value. The decoder model is not applicable for level 31. */
38 static int32_t high_kbps[1 << LEVEL_BITS] = {
39   INVALID_RATE,   INVALID_RATE,   INVALID_RATE,   INVALID_RATE,
40   INVALID_RATE,   INVALID_RATE,   INVALID_RATE,   INVALID_RATE,
41   30000,          50000,          UNDEFINED_RATE, UNDEFINED_RATE,
42   100000,         160000,         240000,         240000,
43   240000,         480000,         800000,         800000,
44   UNDEFINED_RATE, UNDEFINED_RATE, UNDEFINED_RATE, UNDEFINED_RATE,
45   UNDEFINED_RATE, UNDEFINED_RATE, UNDEFINED_RATE, UNDEFINED_RATE,
46   UNDEFINED_RATE, UNDEFINED_RATE, UNDEFINED_RATE, UNDEFINED_RATE
47 };
48 
49 /* BitrateProfileFactor */
50 static int bitrate_profile_factor[1 << PROFILE_BITS] = {
51   1, 2, 3, 0, 0, 0, 0, 0
52 };
53 
av1_max_level_bitrate(BITSTREAM_PROFILE seq_profile,int seq_level_idx,int seq_tier)54 int64_t av1_max_level_bitrate(BITSTREAM_PROFILE seq_profile, int seq_level_idx,
55                               int seq_tier) {
56   int64_t bitrate;
57 
58   if (seq_tier) {
59     bitrate = high_kbps[seq_level_idx] * bitrate_profile_factor[seq_profile];
60   } else {
61     bitrate = main_kbps[seq_level_idx] * bitrate_profile_factor[seq_profile];
62   }
63 
64   return bitrate * 1000;
65 }
66 
av1_set_aom_dec_model_info(aom_dec_model_info_t * decoder_model)67 void av1_set_aom_dec_model_info(aom_dec_model_info_t *decoder_model) {
68   decoder_model->encoder_decoder_buffer_delay_length = 16;
69   decoder_model->buffer_removal_time_length = 10;
70   decoder_model->frame_presentation_time_length = 10;
71 }
72 
av1_set_dec_model_op_parameters(aom_dec_model_op_parameters_t * op_params)73 void av1_set_dec_model_op_parameters(aom_dec_model_op_parameters_t *op_params) {
74   op_params->decoder_model_param_present_flag = 1;
75   op_params->decoder_buffer_delay = 90000 >> 1;  //  0.5 s
76   op_params->encoder_buffer_delay = 90000 >> 1;  //  0.5 s
77   op_params->low_delay_mode_flag = 0;
78   op_params->display_model_param_present_flag = 1;
79   op_params->initial_display_delay = 8;  // 8 frames delay
80 }
81 
av1_set_resource_availability_parameters(aom_dec_model_op_parameters_t * op_params)82 void av1_set_resource_availability_parameters(
83     aom_dec_model_op_parameters_t *op_params) {
84   op_params->decoder_model_param_present_flag = 0;
85   op_params->decoder_buffer_delay =
86       70000;  // Resource availability mode default
87   op_params->encoder_buffer_delay =
88       20000;                           // Resource availability mode default
89   op_params->low_delay_mode_flag = 0;  // Resource availability mode default
90   op_params->display_model_param_present_flag = 1;
91   op_params->initial_display_delay = 8;  // 8 frames delay
92 }
93