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Diffstat (limited to '')
| -rw-r--r-- | third_party/aom/av1/common/timing.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/third_party/aom/av1/common/timing.c b/third_party/aom/av1/common/timing.c new file mode 100644 index 0000000000..49dbde78fb --- /dev/null +++ b/third_party/aom/av1/common/timing.c @@ -0,0 +1,79 @@ +/* + * Copyright (c) 2016, Alliance for Open Media. All rights reserved + * + * This source code is subject to the terms of the BSD 2 Clause License and + * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License + * was not distributed with this source code in the LICENSE file, you can + * obtain it at www.aomedia.org/license/software. If the Alliance for Open + * Media Patent License 1.0 was not distributed with this source code in the + * PATENTS file, you can obtain it at www.aomedia.org/license/patent. + */ + +#include "av1/common/timing.h" + +/* Tables for AV1 max bitrates for different levels of main and high tier. + * The tables are in Kbps instead of Mbps in the specification. + * Note that depending on the profile, a multiplier is needed. + */ + +/* Max Bitrates for levels of Main Tier in kbps. Bitrate in main_kbps [31] */ +/* is a dummy value. The decoder model is not applicable for level 31. */ +static int32_t main_kbps[1 << LEVEL_BITS] = { + 1500, 3000, 0, 0, 6000, 10000, 0, 0, 12000, 20000, 0, + 0, 30000, 40000, 60000, 60000, 60000, 100000, 160000, 160000, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, (1 << 26) +}; + +/* Max Bitrates for levels of High Tier in kbps. Bitrate in high_kbps [31] */ +/* is a dummy value. The decoder model is not applicable for level 31. */ +static int32_t high_kbps[1 << LEVEL_BITS] = { + 0, 0, 0, 0, 0, 0, 0, 0, + 30000, 50000, 0, 0, 100000, 160000, 240000, 240000, + 240000, 480000, 800000, 800000, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, (1 << 26) +}; + +/* BitrateProfileFactor */ +static int bitrate_profile_factor[1 << PROFILE_BITS] = { + 1, 2, 3, 0, 0, 0, 0, 0 +}; + +int64_t max_level_bitrate(BITSTREAM_PROFILE seq_profile, int seq_level_idx, + int seq_tier) { + int64_t bitrate; + + if (seq_tier) { + bitrate = high_kbps[seq_level_idx] * bitrate_profile_factor[seq_profile]; + } else { + bitrate = main_kbps[seq_level_idx] * bitrate_profile_factor[seq_profile]; + } + + return bitrate * 1000; +} + +void set_aom_dec_model_info(aom_dec_model_info_t *decoder_model) { + decoder_model->encoder_decoder_buffer_delay_length = 16; + decoder_model->buffer_removal_time_length = 10; + decoder_model->frame_presentation_time_length = 10; +} + +void set_dec_model_op_parameters(aom_dec_model_op_parameters_t *op_params) { + op_params->decoder_model_param_present_flag = 1; + op_params->decoder_buffer_delay = 90000 >> 1; // 0.5 s + op_params->encoder_buffer_delay = 90000 >> 1; // 0.5 s + op_params->low_delay_mode_flag = 0; + op_params->display_model_param_present_flag = 1; + op_params->initial_display_delay = 8; // 8 frames delay +} + +void set_resource_availability_parameters( + aom_dec_model_op_parameters_t *op_params) { + op_params->decoder_model_param_present_flag = 0; + op_params->decoder_buffer_delay = + 70000; // Resource availability mode default + op_params->encoder_buffer_delay = + 20000; // Resource availability mode default + op_params->low_delay_mode_flag = 0; // Resource availability mode default + op_params->display_model_param_present_flag = 1; + op_params->initial_display_delay = 8; // 8 frames delay +} |