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 const 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 const 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 const int bitrate_profile_factor[1 << PROFILE_BITS] = { 1, 2, 3, 0,
51 0, 0, 0, 0 };
52
av1_max_level_bitrate(BITSTREAM_PROFILE seq_profile,int seq_level_idx,int seq_tier)53 int64_t av1_max_level_bitrate(BITSTREAM_PROFILE seq_profile, int seq_level_idx,
54 int seq_tier) {
55 int64_t bitrate;
56
57 if (seq_tier) {
58 bitrate = high_kbps[seq_level_idx] * bitrate_profile_factor[seq_profile];
59 } else {
60 bitrate = main_kbps[seq_level_idx] * bitrate_profile_factor[seq_profile];
61 }
62
63 return bitrate * 1000;
64 }
65
av1_set_aom_dec_model_info(aom_dec_model_info_t * decoder_model)66 void av1_set_aom_dec_model_info(aom_dec_model_info_t *decoder_model) {
67 decoder_model->encoder_decoder_buffer_delay_length = 16;
68 decoder_model->buffer_removal_time_length = 10;
69 decoder_model->frame_presentation_time_length = 10;
70 }
71
av1_set_dec_model_op_parameters(aom_dec_model_op_parameters_t * op_params)72 void av1_set_dec_model_op_parameters(aom_dec_model_op_parameters_t *op_params) {
73 op_params->decoder_model_param_present_flag = 1;
74 op_params->decoder_buffer_delay = 90000 >> 1; // 0.5 s
75 op_params->encoder_buffer_delay = 90000 >> 1; // 0.5 s
76 op_params->low_delay_mode_flag = 0;
77 op_params->display_model_param_present_flag = 1;
78 op_params->initial_display_delay = 8; // 8 frames delay
79 }
80
av1_set_resource_availability_parameters(aom_dec_model_op_parameters_t * op_params)81 void av1_set_resource_availability_parameters(
82 aom_dec_model_op_parameters_t *op_params) {
83 op_params->decoder_model_param_present_flag = 0;
84 op_params->decoder_buffer_delay =
85 70000; // Resource availability mode default
86 op_params->encoder_buffer_delay =
87 20000; // Resource availability mode default
88 op_params->low_delay_mode_flag = 0; // Resource availability mode default
89 op_params->display_model_param_present_flag = 1;
90 op_params->initial_display_delay = 8; // 8 frames delay
91 }
92