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-rw-r--r--media/libaom/src/av1/common/timing.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/media/libaom/src/av1/common/timing.c b/media/libaom/src/av1/common/timing.c
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+++ b/media/libaom/src/av1/common/timing.c
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+/*
+ * 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
+}