timing.c (4098B)
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 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 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 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 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 }