stagefright: determine if an HEVC file is HDR (72061e5a) · Commits · e / os / android_frameworks_av

media/libstagefright/HevcUtils.cpp

+124 −1

Original line number	Diff line number	Diff line
		@@ -18,6 +18,7 @@
		#define LOG_TAG "HevcUtils"

		#include <cstring>
		#include <utility>

		#include "include/HevcUtils.h"
		#include "include/avc_utils.h"
		@@ -39,7 +40,8 @@ static const uint8_t kHevcNalUnitTypes[5] = {
		kHevcNalUnitTypeSuffixSei,
		};

		HevcParameterSets::HevcParameterSets() {
		HevcParameterSets::HevcParameterSets()
		: mInfo(kInfoNone) {
		}

		status_t HevcParameterSets::addNalUnit(const uint8_t* data, size_t size) {
		@@ -221,6 +223,127 @@ status_t HevcParameterSets::parseSps(const uint8_t* data, size_t size) {
		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.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]
		}
		}
		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;
		}

media/libstagefright/include/HevcUtils.h

+17 −0

Original line number	Diff line number	Diff line
		@@ -56,10 +56,24 @@ enum {
		kBitDepthLumaMinus8,
		// uint8_t
		kBitDepthChromaMinus8,
		// uint8_t
		kVideoFullRangeFlag,
		// uint8_t
		kColourPrimaries,
		// uint8_t
		kTransferCharacteristics,
		// uint8_t
		kMatrixCoeffs,
		};

		class HevcParameterSets {
		public:
		enum Info : uint32_t {
		kInfoNone = 0,
		kInfoIsHdr = 1 << 0,
		kInfoHasColorDescription = 1 << 1,
		};

		HevcParameterSets();

		status_t addNalUnit(const uint8_t* data, size_t size);
		@@ -77,6 +91,8 @@ public:
		bool write(size_t index, uint8_t* dest, size_t size);
		status_t makeHvcc(uint8_t hvcc, size_t hvccSize, size_t nalSizeLength);

		Info getInfo() const { return mInfo; }

		private:
		status_t parseVps(const uint8_t* data, size_t size);
		status_t parseSps(const uint8_t* data, size_t size);
		@@ -84,6 +100,7 @@ private:

		KeyedVector<uint32_t, uint64_t> mParams;
		Vector<sp<ABuffer>> mNalUnits;
		Info mInfo;

		DISALLOW_EVIL_CONSTRUCTORS(HevcParameterSets);
		};