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Rene Zeldenthuis
2024-02-17 10:12:23 +01:00
parent 152c068f68
commit 6119020e7d
4 changed files with 124 additions and 71 deletions
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33
lib/micro-rtsp-server/include/micro_rtsp_jpeg.h
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@@ -2,17 +2,34 @@
#include <stdint.h>
#include <stddef.h>
#include <tuple>
class micro_rtsp_jpeg
{
public:
micro_rtsp_jpeg(const uint8_t *jpeg, size_t size);
bool decode_jpeg(const uint8_t *jpg, size_t size);
std::tuple<const uint8_t *, size_t> quantization_table_0_;
std::tuple<const uint8_t *, size_t> quantization_table_1_;
std::tuple<const uint8_t *, size_t> jpeg_data_;
protected:
bool decode_jpeg(uint8_t *jpg, size_t size);
std::tuple<const uint8_t *, size_t> find_jpeg_section(uint8_t **ptr, uint8_t *end, uint8_t flag);
class __attribute__ ((packed)) jpg_section
{
public:
uint8_t flag() const { return section_flag; }
const char *flag_name() const;
uint16_t section_length() const { return section_flag == 0xd8 || section_flag == 0xd9 ? 0 : (section_length_msb << 8) + section_length_lsb; }
const uint8_t *data() const { return reinterpret_cast<const uint8_t *>(&section_data[1]); }
uint16_t data_length() const { return section_length() - 3; }
private:
const uint8_t section_flag;
const uint8_t section_length_msb;
const uint8_t section_length_lsb;
const uint8_t section_data[];
};
const jpg_section *quantization_table_0_;
const jpg_section *quantization_table_1_;
const uint8_t *jpeg_data_start;
const uint8_t *jpeg_data_end;
private:
static const jpg_section *find_jpeg_section(const uint8_t **ptr, const uint8_t *end, uint8_t flag);
};