update cspot

components/spotify/cspot/bell/include/audio/container/Mpeg4Atoms.h

@@ -0,0 +1,108 @@
+// Copyright (c) Kuba Szczodrzyński 2022-1-8.
+
+#pragma once
+
+#include <cstdint>
+
+enum class AudioSampleFormat;
+enum class MP4AObjectType;
+enum class MP4AProfile;
+
+typedef struct {
+	/** Absolute offset of mdat header (or moof for fMP4) */
+	uint32_t start;
+	/** Absolute offset of the last mdat byte */
+	uint32_t end;
+	/** Total duration of this fragment */
+	uint32_t duration;
+} Mpeg4Fragment;
+
+typedef struct {
+	/** Number of chunks this descriptor applies to */
+	uint16_t count;
+	/** Number of samples in the described chunks */
+	uint32_t samples;
+	uint16_t sampleDescriptionId;
+} Mpeg4ChunkRange;
+
+/** Absolute offset of the chunk data */
+typedef uint32_t Mpeg4ChunkOffset;
+
+typedef struct {
+	/** Abs. offset of data start in the current chunk */
+	uint32_t start;
+	/** Abs. offset of data end in the current chunk */
+	uint32_t end;
+	/** Abs. offset of the next chunk data, or 0 for last chunk in a fragment */
+	uint32_t nextStart;
+} Mpeg4Chunk;
+
+typedef struct {
+	/** Number of samples this descriptor applies to */
+	uint32_t count;
+	/** Duration of the described samples */
+	uint32_t duration;
+} Mpeg4SampleRange;
+
+/** Size of a single sample */
+typedef uint32_t Mpeg4SampleSize;
+
+/** Flags for a sample */
+typedef uint32_t SampleFlags;
+
+/** Default values for samples in the movie/fragment */
+typedef struct {
+	/** Absolute offset of first mdat byte */
+	uint32_t offset;
+	uint32_t sampleDescriptionId;
+	uint32_t duration;
+	uint32_t size;
+	SampleFlags flags;
+} SampleDefaults;
+
+/** Sample Description Table */
+typedef struct {
+	uint16_t dataReferenceIndex;
+	AudioSampleFormat format;
+	// params for MPEG-4 Elementary Stream Descriptors
+	MP4AObjectType mp4aObjectType;
+	MP4AProfile mp4aProfile;
+	// atom header for unknown descriptors
+	uint32_t dataType;
+	// codec-specific data (either DecoderSpecificInfo or the entire descriptor)
+	uint32_t dataLength;
+	uint8_t *data;
+} SampleDescription;
+
+typedef struct {
+	// byte 1 - bits 0:7
+	bool durationIsEmpty : 1;
+	bool defaultBaseIsMoof : 1;
+	bool dummy1 : 6;
+	// byte 2 - bits 0:7
+	uint8_t dummy2 : 8;
+	// byte 3 - bits 0:7
+	bool baseDataOffsetPresent : 1;
+	bool sampleDescriptionIndexPresent : 1;
+	bool dummy3 : 1;
+	bool defaultSampleDurationPresent : 1;
+	bool defaultSampleSizePresent : 1;
+	bool defaultSampleFlagsPresent : 1;
+	bool dummy4 : 2;
+} TfFlags;
+
+typedef struct {
+	// byte 1 - bits 0:7
+	uint8_t dummy1 : 8;
+	// byte 2 - bits 0:7
+	bool sampleDurationPresent : 1;
+	bool sampleSizePresent : 1;
+	bool sampleFlagsPresent : 1;
+	bool sampleCompositionTimeOffsetsPresent : 1;
+	bool dummy2 : 4;
+	// byte 3 - bits 0:7
+	bool dataOffsetPresent : 1;
+	bool dummy3 : 1;
+	bool firstSampleFlagsPresent : 1;
+	bool dummy4 : 5;
+} TrFlags;