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
19 /* Max Bitrates for levels of Main Tier in kbps. Bitrate in main_kbps [31] */
20 /* is a dummy value. The decoder model is not applicable for level 31. */
21 static int32_t main_kbps[1 << LEVEL_BITS] = {
22 1500, 3000, 0, 0, 6000, 10000, 0, 0, 12000, 20000, 0,
23 0, 30000, 40000, 60000, 60000, 60000, 100000, 160000, 160000, 0, 0,
24 0, 0, 0, 0, 0, 0, 0, 0, 0, (1 << 26)
25 };
26
27 /* Max Bitrates for levels of High Tier in kbps. Bitrate in high_kbps [31] */
28 /* is a dummy value. The decoder model is not applicable for level 31. */
29 static int32_t high_kbps[1 << LEVEL_BITS] = {
30 0, 0, 0, 0, 0, 0, 0, 0,
31 30000, 50000, 0, 0, 100000, 160000, 240000, 240000,
32 240000, 480000, 800000, 800000, 0, 0, 0, 0,
33 0, 0, 0, 0, 0, 0, 0, (1 << 26)
34 };
35
36 /* BitrateProfileFactor */
37 static int bitrate_profile_factor[1 << PROFILE_BITS] = {
38 1, 2, 3, 0, 0, 0, 0, 0
39 };
40
max_level_bitrate(BITSTREAM_PROFILE seq_profile,int seq_level_idx,int seq_tier)41 int64_t max_level_bitrate(BITSTREAM_PROFILE seq_profile, int seq_level_idx,
42 int seq_tier) {
43 int64_t bitrate;
44
45 if (seq_tier) {
46 bitrate = high_kbps[seq_level_idx] * bitrate_profile_factor[seq_profile];
47 } else {
48 bitrate = main_kbps[seq_level_idx] * bitrate_profile_factor[seq_profile];
49 }
50
51 return bitrate * 1000;
52 }
53
set_aom_dec_model_info(aom_dec_model_info_t * decoder_model)54 void set_aom_dec_model_info(aom_dec_model_info_t *decoder_model) {
55 decoder_model->encoder_decoder_buffer_delay_length = 16;
56 decoder_model->buffer_removal_time_length = 10;
57 decoder_model->frame_presentation_time_length = 10;
58 }
59
set_dec_model_op_parameters(aom_dec_model_op_parameters_t * op_params)60 void set_dec_model_op_parameters(aom_dec_model_op_parameters_t *op_params) {
61 op_params->decoder_model_param_present_flag = 1;
62 op_params->decoder_buffer_delay = 90000 >> 1; // 0.5 s
63 op_params->encoder_buffer_delay = 90000 >> 1; // 0.5 s
64 op_params->low_delay_mode_flag = 0;
65 op_params->display_model_param_present_flag = 1;
66 op_params->initial_display_delay = 8; // 8 frames delay
67 }
68
set_resource_availability_parameters(aom_dec_model_op_parameters_t * op_params)69 void set_resource_availability_parameters(
70 aom_dec_model_op_parameters_t *op_params) {
71 op_params->decoder_model_param_present_flag = 0;
72 op_params->decoder_buffer_delay =
73 70000; // Resource availability mode default
74 op_params->encoder_buffer_delay =
75 20000; // Resource availability mode default
76 op_params->low_delay_mode_flag = 0; // Resource availability mode default
77 op_params->display_model_param_present_flag = 1;
78 op_params->initial_display_delay = 8; // 8 frames delay
79 }
80