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