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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//#define LOG_NDEBUG 0
#define LOG_TAG "HevcUtils"
#include <cstring>
#include <utility>
#include "include/HevcUtils.h"
#include <media/stagefright/foundation/ABitReader.h>
#include <media/stagefright/foundation/ABuffer.h>
#include <media/stagefright/foundation/ADebug.h>
#include <media/stagefright/foundation/AMessage.h>
#include <media/stagefright/foundation/avc_utils.h>
#include <media/stagefright/MediaErrors.h>
#include <media/stagefright/Utils.h>
#define UNUSED_PARAM __attribute__((unused))
namespace android {
static const uint8_t kHevcNalUnitTypes[5] = {
kHevcNalUnitTypeVps,
kHevcNalUnitTypeSps,
kHevcNalUnitTypePps,
kHevcNalUnitTypePrefixSei,
kHevcNalUnitTypeSuffixSei,
};
HevcParameterSets::HevcParameterSets()
: mInfo(kInfoNone) {
}
status_t HevcParameterSets::addNalUnit(const uint8_t* data, size_t size) {
if (size < 1) {
ALOGE("empty NAL b/35467107");
return ERROR_MALFORMED;
}
uint8_t nalUnitType = (data[0] >> 1) & 0x3f;
status_t err = OK;
switch (nalUnitType) {
case 32: // VPS
if (size < 2) {
ALOGE("invalid NAL/VPS size b/35467107");
return ERROR_MALFORMED;
}
err = parseVps(data + 2, size - 2);
break;
case 33: // SPS
if (size < 2) {
ALOGE("invalid NAL/SPS size b/35467107");
return ERROR_MALFORMED;
}
err = parseSps(data + 2, size - 2);
break;
case 34: // PPS
if (size < 2) {
ALOGE("invalid NAL/PPS size b/35467107");
return ERROR_MALFORMED;
}
err = parsePps(data + 2, size - 2);
break;
case 39: // Prefix SEI
case 40: // Suffix SEI
// Ignore
break;
default:
ALOGE("Unrecognized NAL unit type.");
return ERROR_MALFORMED;
}
if (err != OK) {
ALOGE("error parsing VPS or SPS or PPS");
return err;
}
sp<ABuffer> buffer = ABuffer::CreateAsCopy(data, size);
buffer->setInt32Data(nalUnitType);
mNalUnits.push(buffer);
return OK;
}
template <typename T>
static bool findParam(uint32_t key, T *param,
KeyedVector<uint32_t, uint64_t> &params) {
CHECK(param);
if (params.indexOfKey(key) < 0) {
return false;
}
*param = (T) params[key];
return true;
}
bool HevcParameterSets::findParam8(uint32_t key, uint8_t *param) {
return findParam(key, param, mParams);
}
bool HevcParameterSets::findParam16(uint32_t key, uint16_t *param) {
return findParam(key, param, mParams);
}
bool HevcParameterSets::findParam32(uint32_t key, uint32_t *param) {
return findParam(key, param, mParams);
}
bool HevcParameterSets::findParam64(uint32_t key, uint64_t *param) {
return findParam(key, param, mParams);
}
size_t HevcParameterSets::getNumNalUnitsOfType(uint8_t type) {
size_t num = 0;
for (size_t i = 0; i < mNalUnits.size(); ++i) {
if (getType(i) == type) {
++num;
}
}
return num;
}
uint8_t HevcParameterSets::getType(size_t index) {
CHECK_LT(index, mNalUnits.size());
return mNalUnits[index]->int32Data();
}
size_t HevcParameterSets::getSize(size_t index) {
CHECK_LT(index, mNalUnits.size());
return mNalUnits[index]->size();
}
bool HevcParameterSets::write(size_t index, uint8_t* dest, size_t size) {
CHECK_LT(index, mNalUnits.size());
const sp<ABuffer>& nalUnit = mNalUnits[index];
if (size < nalUnit->size()) {
ALOGE("dest buffer size too small: %zu vs. %zu to be written",
size, nalUnit->size());
return false;
}
memcpy(dest, nalUnit->data(), nalUnit->size());
return true;
}
status_t HevcParameterSets::parseVps(const uint8_t* data, size_t size) {
// See Rec. ITU-T H.265 v3 (04/2015) Chapter 7.3.2.1 for reference
NALBitReader reader(data, size);
// Skip vps_video_parameter_set_id
reader.skipBits(4);
// Skip vps_base_layer_internal_flag
reader.skipBits(1);
// Skip vps_base_layer_available_flag
reader.skipBits(1);
// Skip vps_max_layers_minus_1
reader.skipBits(6);
// Skip vps_max_sub_layers_minus1
reader.skipBits(3);
// Skip vps_temporal_id_nesting_flags
reader.skipBits(1);
// Skip reserved
reader.skipBits(16);
if (reader.atLeastNumBitsLeft(96)) {
mParams.add(kGeneralProfileSpace, reader.getBits(2));
mParams.add(kGeneralTierFlag, reader.getBits(1));
mParams.add(kGeneralProfileIdc, reader.getBits(5));
mParams.add(kGeneralProfileCompatibilityFlags, reader.getBits(32));
mParams.add(
kGeneralConstraintIndicatorFlags,
((uint64_t)reader.getBits(16) << 32) | reader.getBits(32));
mParams.add(kGeneralLevelIdc, reader.getBits(8));
// 96 bits total for general profile.
} else {
reader.skipBits(96);
}
return reader.overRead() ? ERROR_MALFORMED : OK;
}
status_t HevcParameterSets::parseSps(const uint8_t* data, size_t size) {
// See Rec. ITU-T H.265 v3 (04/2015) Chapter 7.3.2.2 for reference
NALBitReader reader(data, size);
// Skip sps_video_parameter_set_id
reader.skipBits(4);
uint8_t maxSubLayersMinus1 = reader.getBitsWithFallback(3, 0);
// Skip sps_temporal_id_nesting_flag;
reader.skipBits(1);
// Skip general profile
reader.skipBits(96);
if (maxSubLayersMinus1 > 0) {
bool subLayerProfilePresentFlag[8];
bool subLayerLevelPresentFlag[8];
for (int i = 0; i < maxSubLayersMinus1; ++i) {
subLayerProfilePresentFlag[i] = reader.getBitsWithFallback(1, 0);
subLayerLevelPresentFlag[i] = reader.getBitsWithFallback(1, 0);
}
// Skip reserved
reader.skipBits(2 * (8 - maxSubLayersMinus1));
for (int i = 0; i < maxSubLayersMinus1; ++i) {
if (subLayerProfilePresentFlag[i]) {
// Skip profile
reader.skipBits(88);
}
if (subLayerLevelPresentFlag[i]) {
// Skip sub_layer_level_idc[i]
reader.skipBits(8);
}
}
}
// Skip sps_seq_parameter_set_id
skipUE(&reader);
uint8_t chromaFormatIdc = parseUEWithFallback(&reader, 0);
mParams.add(kChromaFormatIdc, chromaFormatIdc);
if (chromaFormatIdc == 3) {
// Skip separate_colour_plane_flag
reader.skipBits(1);
}
// Skip pic_width_in_luma_samples
skipUE(&reader);
// Skip pic_height_in_luma_samples
skipUE(&reader);
if (reader.getBitsWithFallback(1, 0) /* i.e. conformance_window_flag */) {
// Skip conf_win_left_offset
skipUE(&reader);
// Skip conf_win_right_offset
skipUE(&reader);
// Skip conf_win_top_offset
skipUE(&reader);
// Skip conf_win_bottom_offset
skipUE(&reader);
}
mParams.add(kBitDepthLumaMinus8, parseUEWithFallback(&reader, 0));
mParams.add(kBitDepthChromaMinus8, parseUEWithFallback(&reader, 0));
// log2_max_pic_order_cnt_lsb_minus4
size_t log2MaxPicOrderCntLsb = parseUEWithFallback(&reader, 0) + (size_t)4;
bool spsSubLayerOrderingInfoPresentFlag = reader.getBitsWithFallback(1, 0);
for (uint32_t i = spsSubLayerOrderingInfoPresentFlag ? 0 : maxSubLayersMinus1;
i <= maxSubLayersMinus1; ++i) {
skipUE(&reader); // sps_max_dec_pic_buffering_minus1[i]
skipUE(&reader); // sps_max_num_reorder_pics[i]
skipUE(&reader); // sps_max_latency_increase_plus1[i]
}
skipUE(&reader); // log2_min_luma_coding_block_size_minus3
skipUE(&reader); // log2_diff_max_min_luma_coding_block_size
skipUE(&reader); // log2_min_luma_transform_block_size_minus2
skipUE(&reader); // log2_diff_max_min_luma_transform_block_size
skipUE(&reader); // max_transform_hierarchy_depth_inter
skipUE(&reader); // max_transform_hierarchy_depth_intra
if (reader.getBitsWithFallback(1, 0)) { // scaling_list_enabled_flag u(1)
// scaling_list_data
if (reader.getBitsWithFallback(1, 0)) { // sps_scaling_list_data_present_flag
for (uint32_t sizeId = 0; sizeId < 4; ++sizeId) {
for (uint32_t matrixId = 0; matrixId < 6; matrixId += (sizeId == 3) ? 3 : 1) {
if (!reader.getBitsWithFallback(1, 1)) {
// scaling_list_pred_mode_flag[sizeId][matrixId]
skipUE(&reader); // scaling_list_pred_matrix_id_delta[sizeId][matrixId]
} else {
uint32_t coefNum = std::min(64, (1 << (4 + (sizeId << 1))));
if (sizeId > 1) {
skipSE(&reader); // scaling_list_dc_coef_minus8[sizeId − 2][matrixId]
}
for (uint32_t i = 0; i < coefNum; ++i) {
skipSE(&reader); // scaling_list_delta_coef
}
}
}
}
}
}
reader.skipBits(1); // amp_enabled_flag
reader.skipBits(1); // sample_adaptive_offset_enabled_flag u(1)
if (reader.getBitsWithFallback(1, 0)) { // pcm_enabled_flag
reader.skipBits(4); // pcm_sample_bit_depth_luma_minus1
reader.skipBits(4); // pcm_sample_bit_depth_chroma_minus1 u(4)
skipUE(&reader); // log2_min_pcm_luma_coding_block_size_minus3
skipUE(&reader); // log2_diff_max_min_pcm_luma_coding_block_size
reader.skipBits(1); // pcm_loop_filter_disabled_flag
}
uint32_t numShortTermRefPicSets = parseUEWithFallback(&reader, 0);
uint32_t numPics = 0;
for (uint32_t i = 0; i < numShortTermRefPicSets; ++i) {
// st_ref_pic_set(i)
if (i != 0 && reader.getBitsWithFallback(1, 0)) { // inter_ref_pic_set_prediction_flag
reader.skipBits(1); // delta_rps_sign
skipUE(&reader); // abs_delta_rps_minus1
uint32_t nextNumPics = 0;
for (uint32_t j = 0; j <= numPics; ++j) {
if (reader.getBitsWithFallback(1, 0) // used_by_curr_pic_flag[j]
|| reader.getBitsWithFallback(1, 0)) { // use_delta_flag[j]
++nextNumPics;
}
}
numPics = nextNumPics;
} else {
uint32_t numNegativePics = parseUEWithFallback(&reader, 0);
uint32_t numPositivePics = parseUEWithFallback(&reader, 0);
if (numNegativePics > UINT32_MAX - numPositivePics) {
return ERROR_MALFORMED;
}
numPics = numNegativePics + numPositivePics;
for (uint32_t j = 0; j < numPics; ++j) {
skipUE(&reader); // delta_poc_s0|1_minus1[i]
reader.skipBits(1); // used_by_curr_pic_s0|1_flag[i]
if (reader.overRead()) {
return ERROR_MALFORMED;
}
}
}
if (reader.overRead()) {
return ERROR_MALFORMED;
}
}
if (reader.getBitsWithFallback(1, 0)) { // long_term_ref_pics_present_flag
uint32_t numLongTermRefPicSps = parseUEWithFallback(&reader, 0);
for (uint32_t i = 0; i < numLongTermRefPicSps; ++i) {
reader.skipBits(log2MaxPicOrderCntLsb); // lt_ref_pic_poc_lsb_sps[i]
reader.skipBits(1); // used_by_curr_pic_lt_sps_flag[i]
if (reader.overRead()) {
return ERROR_MALFORMED;
}
}
}
reader.skipBits(1); // sps_temporal_mvp_enabled_flag
reader.skipBits(1); // strong_intra_smoothing_enabled_flag
if (reader.getBitsWithFallback(1, 0)) { // vui_parameters_present_flag
if (reader.getBitsWithFallback(1, 0)) { // aspect_ratio_info_present_flag
uint32_t aspectRatioIdc = reader.getBitsWithFallback(8, 0);
if (aspectRatioIdc == 0xFF /* EXTENDED_SAR */) {
reader.skipBits(16); // sar_width
reader.skipBits(16); // sar_height
}
}
if (reader.getBitsWithFallback(1, 0)) { // overscan_info_present_flag
reader.skipBits(1); // overscan_appropriate_flag
}
if (reader.getBitsWithFallback(1, 0)) { // video_signal_type_present_flag
reader.skipBits(3); // video_format
uint32_t videoFullRangeFlag;
if (reader.getBitsGraceful(1, &videoFullRangeFlag)) {
mParams.add(kVideoFullRangeFlag, videoFullRangeFlag);
}
if (reader.getBitsWithFallback(1, 0)) { // colour_description_present_flag
mInfo = (Info)(mInfo | kInfoHasColorDescription);
uint32_t colourPrimaries, transferCharacteristics, matrixCoeffs;
if (reader.getBitsGraceful(8, &colourPrimaries)) {
mParams.add(kColourPrimaries, colourPrimaries);
}
if (reader.getBitsGraceful(8, &transferCharacteristics)) {
mParams.add(kTransferCharacteristics, transferCharacteristics);
if (transferCharacteristics == 16 /* ST 2084 */
|| transferCharacteristics == 18 /* ARIB STD-B67 HLG */) {
mInfo = (Info)(mInfo | kInfoIsHdr);
}
}
if (reader.getBitsGraceful(8, &matrixCoeffs)) {
mParams.add(kMatrixCoeffs, matrixCoeffs);
}
}
// skip rest of VUI
}
}
return reader.overRead() ? ERROR_MALFORMED : OK;
}
void HevcParameterSets::FindHEVCDimensions(const sp<ABuffer> &SpsBuffer, int32_t *width, int32_t *height)
{
ALOGD("FindHEVCDimensions");
// See Rec. ITU-T H.265 v3 (04/2015) Chapter 7.3.2.2 for reference
ABitReader reader(SpsBuffer->data() + 1, SpsBuffer->size() - 1);
// Skip sps_video_parameter_set_id
reader.skipBits(4);
uint8_t maxSubLayersMinus1 = reader.getBitsWithFallback(3, 0);
// Skip sps_temporal_id_nesting_flag;
reader.skipBits(1);
// Skip general profile
reader.skipBits(96);
if (maxSubLayersMinus1 > 0) {
bool subLayerProfilePresentFlag[8];
bool subLayerLevelPresentFlag[8];
for (int i = 0; i < maxSubLayersMinus1; ++i) {
subLayerProfilePresentFlag[i] = reader.getBitsWithFallback(1, 0);
subLayerLevelPresentFlag[i] = reader.getBitsWithFallback(1, 0);
}
// Skip reserved
reader.skipBits(2 * (8 - maxSubLayersMinus1));
for (int i = 0; i < maxSubLayersMinus1; ++i) {
if (subLayerProfilePresentFlag[i]) {
// Skip profile
reader.skipBits(88);
}
if (subLayerLevelPresentFlag[i]) {
// Skip sub_layer_level_idc[i]
reader.skipBits(8);
}
}
}
// Skip sps_seq_parameter_set_id
skipUE(&reader);
uint8_t chromaFormatIdc = parseUEWithFallback(&reader, 0);
if (chromaFormatIdc == 3) {
// Skip separate_colour_plane_flag
reader.skipBits(1);
}
skipUE(&reader);
skipUE(&reader);
// pic_width_in_luma_samples
*width = parseUEWithFallback(&reader, 0);
// pic_height_in_luma_samples
*height = parseUEWithFallback(&reader, 0);
}
status_t HevcParameterSets::parsePps(
const uint8_t* data UNUSED_PARAM, size_t size UNUSED_PARAM) {
return OK;
}
status_t HevcParameterSets::makeHvcc(uint8_t *hvcc, size_t *hvccSize,
size_t nalSizeLength) {
if (hvcc == NULL || hvccSize == NULL
|| (nalSizeLength != 4 && nalSizeLength != 2)) {
return BAD_VALUE;
}
// ISO 14496-15: HEVC file format
size_t size = 23; // 23 bytes in the header
size_t numOfArrays = 0;
const size_t numNalUnits = getNumNalUnits();
for (size_t i = 0; i < ARRAY_SIZE(kHevcNalUnitTypes); ++i) {
uint8_t type = kHevcNalUnitTypes[i];
size_t numNalus = getNumNalUnitsOfType(type);
if (numNalus == 0) {
continue;
}
++numOfArrays;
size += 3;
for (size_t j = 0; j < numNalUnits; ++j) {
if (getType(j) != type) {
continue;
}
size += 2 + getSize(j);
}
}
uint8_t generalProfileSpace, generalTierFlag, generalProfileIdc;
if (!findParam8(kGeneralProfileSpace, &generalProfileSpace)
|| !findParam8(kGeneralTierFlag, &generalTierFlag)
|| !findParam8(kGeneralProfileIdc, &generalProfileIdc)) {
return ERROR_MALFORMED;
}
uint32_t compatibilityFlags;
uint64_t constraintIdcFlags;
if (!findParam32(kGeneralProfileCompatibilityFlags, &compatibilityFlags)
|| !findParam64(kGeneralConstraintIndicatorFlags, &constraintIdcFlags)) {
return ERROR_MALFORMED;
}
uint8_t generalLevelIdc;
if (!findParam8(kGeneralLevelIdc, &generalLevelIdc)) {
return ERROR_MALFORMED;
}
uint8_t chromaFormatIdc, bitDepthLumaMinus8, bitDepthChromaMinus8;
if (!findParam8(kChromaFormatIdc, &chromaFormatIdc)
|| !findParam8(kBitDepthLumaMinus8, &bitDepthLumaMinus8)
|| !findParam8(kBitDepthChromaMinus8, &bitDepthChromaMinus8)) {
return ERROR_MALFORMED;
}
if (size > *hvccSize) {
return NO_MEMORY;
}
*hvccSize = size;
uint8_t *header = hvcc;
header[0] = 1;
header[1] = (generalProfileSpace << 6) | (generalTierFlag << 5) | generalProfileIdc;
header[2] = (compatibilityFlags >> 24) & 0xff;
header[3] = (compatibilityFlags >> 16) & 0xff;
header[4] = (compatibilityFlags >> 8) & 0xff;
header[5] = compatibilityFlags & 0xff;
header[6] = (constraintIdcFlags >> 40) & 0xff;
header[7] = (constraintIdcFlags >> 32) & 0xff;
header[8] = (constraintIdcFlags >> 24) & 0xff;
header[9] = (constraintIdcFlags >> 16) & 0xff;
header[10] = (constraintIdcFlags >> 8) & 0xff;
header[11] = constraintIdcFlags & 0xff;
header[12] = generalLevelIdc;
// FIXME: parse min_spatial_segmentation_idc.
header[13] = 0xf0;
header[14] = 0;
// FIXME: derive parallelismType properly.
header[15] = 0xfc;
header[16] = 0xfc | chromaFormatIdc;
header[17] = 0xf8 | bitDepthLumaMinus8;
header[18] = 0xf8 | bitDepthChromaMinus8;
// FIXME: derive avgFrameRate
header[19] = 0;
header[20] = 0;
// constantFrameRate, numTemporalLayers, temporalIdNested all set to 0.
header[21] = nalSizeLength - 1;
header[22] = numOfArrays;
header += 23;
for (size_t i = 0; i < ARRAY_SIZE(kHevcNalUnitTypes); ++i) {
uint8_t type = kHevcNalUnitTypes[i];
size_t numNalus = getNumNalUnitsOfType(type);
if (numNalus == 0) {
continue;
}
// array_completeness set to 1.
header[0] = type | 0x80;
header[1] = (numNalus >> 8) & 0xff;
header[2] = numNalus & 0xff;
header += 3;
for (size_t j = 0; j < numNalUnits; ++j) {
if (getType(j) != type) {
continue;
}
header[0] = (getSize(j) >> 8) & 0xff;
header[1] = getSize(j) & 0xff;
if (!write(j, header + 2, size - (header - (uint8_t *)hvcc))) {
return NO_MEMORY;
}
header += (2 + getSize(j));
}
}
CHECK_EQ(header - size, hvcc);
return OK;
}
} // namespace android