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This commit is contained in:
Rene Zeldenthuis
2024-04-01 17:57:37 +02:00
parent c599657882
commit f59fb8bb9a
10 changed files with 200 additions and 184 deletions
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6
lib/micro-jpg/include/jpg.h
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@@ -7,12 +7,12 @@ class jpg
public: public:
bool decode(const uint8_t *jpg, size_t size); bool decode(const uint8_t *jpg, size_t size);
const struct jpg_section *quantization_table_0_; const jpg_section_t *quantization_table_luminance_;
const struct jpg_section *quantization_table_1_; const jpg_section_t *quantization_table_chrominance_;
const uint8_t *jpeg_data_start; const uint8_t *jpeg_data_start;
const uint8_t *jpeg_data_end; const uint8_t *jpeg_data_end;
private: private:
static const jpg_section *find_jpg_section(const uint8_t **ptr, const uint8_t *end, jpg_section::jpg_section_flag flag); static const jpg_section_t *find_jpg_section(const uint8_t **ptr, const uint8_t *end, jpg_section_t::jpg_section_flag flag);
}; };

12
lib/micro-jpg/include/jpg_section.h
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@@ -2,7 +2,7 @@
#include <stdint.h> #include <stdint.h>
struct __attribute__((packed)) jpg_section typedef struct __attribute__((packed))
{ {
enum jpg_section_flag : uint8_t enum jpg_section_flag : uint8_t
{ {
@@ -82,9 +82,9 @@ struct __attribute__((packed)) jpg_section
static const char *flag_name(const jpg_section_flag flag); static const char *flag_name(const jpg_section_flag flag);
uint16_t data_length() const; uint16_t data_length() const;
uint16_t section_length() const; uint16_t section_length() const;
}; } jpg_section_t;
struct __attribute__((packed)) jpg_section_app0 // 0xffe0 typedef struct __attribute__((packed)) // 0xffe0
{ {
char identifier[5] = {'J', 'F', 'I', 'F', 0}; // JFIF identifier, zero-terminated char identifier[5] = {'J', 'F', 'I', 'F', 0}; // JFIF identifier, zero-terminated
uint8_t version_major = 1; uint8_t version_major = 1;
@@ -94,10 +94,10 @@ struct __attribute__((packed)) jpg_section_app0 // 0xffe0
uint16_t density_ver = 1; // density: 1 pixel "per pixel" horizontally and vertically uint16_t density_ver = 1; // density: 1 pixel "per pixel" horizontally and vertically
uint8_t thumbnail_hor = 0; uint8_t thumbnail_hor = 0;
uint8_t thumbnail_ver = 0; // no thumbnail (size 0 x 0) uint8_t thumbnail_ver = 0; // no thumbnail (size 0 x 0)
}; } jpg_section_app0_t;
struct __attribute__((packed)) jpg_section_dqt // 0xffdb typedef struct __attribute__((packed)) // 0xffdb
{ {
uint8_t id; // 0= quantLuminance, 1= quantChrominance uint8_t id; // 0= quantLuminance, 1= quantChrominance
uint8_t data[64]; uint8_t data[64];
}; } jpg_section_dqt_t;

22
lib/micro-jpg/src/jpg.cpp
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@@ -1,20 +1,20 @@
#include <esp32-hal-log.h> #include <esp32-hal-log.h>
#include "jpg.h" #include "jpg.h"
const jpg_section *jpg::find_jpg_section(const uint8_t **ptr, const uint8_t *end, jpg_section::jpg_section_flag flag) const jpg_section_t *jpg::find_jpg_section(const uint8_t **ptr, const uint8_t *end, jpg_section_t::jpg_section_flag flag)
{ {
log_d("find_jpeg_section 0x%02x (%s)", flag, jpg_section::flag_name(flag)); log_d("find_jpeg_section 0x%02x (%s)", flag, jpg_section_t::flag_name(flag));
while (*ptr < end) while (*ptr < end)
{ {
// flag, len MSB, len LSB // flag, len MSB, len LSB
auto section = reinterpret_cast<const jpg_section *>((*ptr)); auto section = reinterpret_cast<const jpg_section_t *>((*ptr));
if (section->framing != 0xff) if (section->framing != 0xff)
{ {
log_e("Expected framing 0xff but found: 0x%02x", section->framing); log_e("Expected framing 0xff but found: 0x%02x", section->framing);
break; break;
} }
if (!jpg_section::is_valid_flag(section->flag)) if (!jpg_section_t::is_valid_flag(section->flag))
{ {
log_d("Unknown section 0x%02x", flag); log_d("Unknown section 0x%02x", flag);
return nullptr; return nullptr;
@@ -24,11 +24,11 @@ const jpg_section *jpg::find_jpg_section(const uint8_t **ptr, const uint8_t *end
*ptr += section->section_length(); *ptr += section->section_length();
if (section->flag == flag) if (section->flag == flag)
{ {
log_d("Found section 0x%02x (%s), %d bytes", flag, jpg_section::flag_name(section->flag), section->section_length()); log_d("Found section 0x%02x (%s), %d bytes", flag, jpg_section_t::flag_name(section->flag), section->section_length());
return section; return section;
} }
log_d("Skipping section: 0x%02x (%s), %d bytes", section->flag, jpg_section::flag_name(section->flag), section->section_length()); log_d("Skipping section: 0x%02x (%s), %d bytes", section->flag, jpg_section_t::flag_name(section->flag), section->section_length());
} }
// Not found // Not found
@@ -44,25 +44,25 @@ bool jpg::decode(const uint8_t *data, size_t size)
auto end = ptr + size; auto end = ptr + size;
// Check for SOI (start of image) 0xff, 0xd8 // Check for SOI (start of image) 0xff, 0xd8
if (!find_jpg_section(&ptr, end, jpg_section::jpg_section_flag::SOI)) if (!find_jpg_section(&ptr, end, jpg_section_t::jpg_section_flag::SOI))
{ {
log_e("No valid start of image marker found"); log_e("No valid start of image marker found");
return false; return false;
} }
// First quantization table (Luminance - black & white images) // First quantization table (Luminance - black & white images)
if (!(quantization_table_0_ = find_jpg_section(&ptr, end, jpg_section::jpg_section_flag::DQT))) if (!(quantization_table_luminance_ = find_jpg_section(&ptr, end, jpg_section_t::jpg_section_flag::DQT)))
{ {
log_e("No quantization table 0 section found"); log_e("No quantization table 0 section found");
return false; return false;
} }
// Second quantization table (Chrominance - color images) // Second quantization table (Chrominance - color images)
if (!(quantization_table_1_ = find_jpg_section(&ptr, end, jpg_section::jpg_section_flag::DQT))) if (!(quantization_table_chrominance_ = find_jpg_section(&ptr, end, jpg_section_t::jpg_section_flag::DQT)))
log_w("No quantization table 1 section found"); log_w("No quantization table 1 section found");
// Start of scan // Start of scan
if (!find_jpg_section(&ptr, end, jpg_section::jpg_section_flag::SOS)) if (!find_jpg_section(&ptr, end, jpg_section_t::jpg_section_flag::SOS))
{ {
log_e("No start of scan section found"); log_e("No start of scan section found");
return false; return false;
@@ -77,7 +77,7 @@ bool jpg::decode(const uint8_t *data, size_t size)
ptr++; ptr++;
// Check if marker is an end of image marker // Check if marker is an end of image marker
if (!find_jpg_section(&ptr, end, jpg_section::jpg_section_flag::EOI)) if (!find_jpg_section(&ptr, end, jpg_section_t::jpg_section_flag::EOI))
{ {
log_e("No end of image marker found"); log_e("No end of image marker found");
return false; return false;

12
lib/micro-jpg/src/jpg_section.cpp
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@@ -1,22 +1,22 @@
#include "jpg_section.h" #include "jpg_section.h"
uint16_t jpg_section::data_length() const uint16_t jpg_section_t::data_length() const
{ {
return (length_msb << 8) + length_lsb - sizeof(jpg_section::length_msb)- sizeof(jpg_section::length_lsb); return (length_msb << 8) + length_lsb - sizeof(jpg_section_t::length_msb)- sizeof(jpg_section_t::length_lsb);
} }
uint16_t jpg_section::section_length() const uint16_t jpg_section_t::section_length() const
{ {
return flag == SOI || flag == EOI ? sizeof(jpg_section::framing) + sizeof(jpg_section::flag) : sizeof(jpg_section::framing) + sizeof(jpg_section::flag) + (length_msb << 8) + length_lsb; return flag == SOI || flag == EOI ? sizeof(jpg_section_t::framing) + sizeof(jpg_section_t::flag) : sizeof(jpg_section_t::framing) + sizeof(jpg_section_t::flag) + (length_msb << 8) + length_lsb;
} }
bool jpg_section::is_valid_flag(const jpg_section_flag flag) bool jpg_section_t::is_valid_flag(const jpg_section_flag flag)
{ {
return flag >= SOF0 && flag <= COM; return flag >= SOF0 && flag <= COM;
} }
// from: https://www.disktuna.com/list-of-jpeg-markers/ // from: https://www.disktuna.com/list-of-jpeg-markers/
const char *jpg_section::flag_name(const jpg_section_flag flag) const char *jpg_section_t::flag_name(const jpg_section_flag flag)
{ {
switch (flag) switch (flag)
{ {

9
lib/micro-rtsp-server/include/micro_rtsp_server.h
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@@ -8,11 +8,12 @@
#include "micro_rtsp_camera.h" #include "micro_rtsp_camera.h"
#include "micro_rtsp_requests.h" #include "micro_rtsp_requests.h"
#include "micro_rtsp_streamer.h"
class micro_rtsp_server : WiFiServer class micro_rtsp_server : WiFiServer
{ {
public: public:
micro_rtsp_server(const micro_rtsp_camera& source, unsigned frame_interval = 100); micro_rtsp_server(micro_rtsp_camera &source, unsigned frame_interval = 100);
~micro_rtsp_server(); ~micro_rtsp_server();
void begin(unsigned short port = 554); void begin(unsigned short port = 554);
@@ -35,12 +36,10 @@ public:
}; };
private: private:
const micro_rtsp_camera &source_; micro_rtsp_camera &source_;
unsigned frame_interval_; unsigned frame_interval_;
unsigned long next_frame_update_; unsigned long next_frame_update_;
unsigned long next_check_client_; unsigned long next_check_client_;
micro_rtsp_streamer streamer_;
std::list<rtsp_client> clients_; std::list<rtsp_client> clients_;
}; };

81
lib/micro-rtsp-server/include/micro_rtsp_streamer.h
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@@ -1,15 +1,90 @@
#pragma once #pragma once
#include <jpg.h> // https://en.wikipedia.org/wiki/Maximum_transmission_unit
constexpr size_t max_wifi_mtu = 2304;
// Payload JPG - https://www.ietf.org/rfc/rfc1890.txt
constexpr uint8_t RTP_PAYLOAD_JPG = 26;
// http://www.ietf.org/rfc/rfc2345.txt Each table is an array of 64 values given in zig-zag order, identical to the format used in a JFIF DQT marker segment.
constexpr size_t jpeg_luminance_table_length = 64;
constexpr size_t jpeg_chrominance_table_length = 64;
// https://www.ietf.org/rfc/rfc2326#section-10.12
typedef struct __attribute__((packed))
{
char magic; // Magic encapsulation ASCII dollar sign (24 hexadecimal)
uint8_t channel; // Channel identifier
uint16_t length; // Network order
} rtp_over_tcp_hdr_t;
class micro_rtsp_streamer class micro_rtsp_streamer
{ {
public: public:
micro_rtsp_streamer(const uint16_t width, const uint16_t height); micro_rtsp_streamer(const uint16_t width, const uint16_t height);
size_t create_jpg_packet(const uint8_t *jpg, uint8_t **jpg_current, const uint8_t *jpg_end, const uint32_t timestamp); rtp_over_tcp_hdr_t *create_jpg_packet(const uint8_t *jpg_scan, const uint8_t *jpg_scan_end, uint8_t **jpg_offset, const uint32_t timestamp, const uint8_t* quantization_table_luminance, const uint8_t* quantization_table_chrominance);
private: private:
uint16_t width_, height_; uint16_t width_, height_;
uint32_t ssrc_; uint32_t ssrc_;
uint16_t sequenceNumber_; uint16_t sequence_number_;
// RTP data header - http://www.ietf.org/rfc/rfc3550.txt
typedef struct __attribute__((packed))
{
uint16_t version : 2; // protocol version
uint16_t padding : 1; // padding flag
uint16_t extension : 1; // header extension flag
uint16_t cc : 4; // CSRC count
uint16_t marker : 1; // marker bit
uint16_t pt : 7; // payload type
uint16_t seq : 16; // sequence number
uint32_t ts; // timestamp
uint32_t ssrc; // synchronization source
} rtp_hdr_t;
// https://datatracker.ietf.org/doc/html/rfc2435
typedef struct __attribute__((packed))
{
uint32_t tspec : 8; // type-specific field
uint32_t off : 24; // fragment byte offset
uint8_t type; // id of jpeg decoder params
uint8_t q; // Q values 0-127 indicate the quantization tables. JPEG types 0 and 1 (and their corresponding types 64 and 65)
uint8_t width; // frame width in 8 pixel blocks
uint8_t height; // frame height in 8 pixel blocks
} jpeg_hdr_t;
typedef struct __attribute__((packed))
{
uint16_t dri;
uint16_t f : 1;
uint16_t l : 1;
uint16_t count : 14;
} jpeg_hdr_rst_t;
typedef struct __attribute__((packed))
{
uint8_t mbz;
uint8_t precision;
uint16_t length;
} jpeg_hdr_qtable_t;
// The types below will be returned, the jpeg_packet_with_quantization_t for the first packet, then the jpeg_packet_t
typedef struct __attribute__((packed))
{
rtp_over_tcp_hdr_t rtp_over_tcp_hdr;
rtp_hdr_t rtp_hdr;
jpeg_hdr_t jpeg_hdr;
jpeg_hdr_qtable_t jpeg_hdr_qtable;
uint8_t quantization_table_luminance[jpeg_luminance_table_length];
uint8_t quantization_table_chrominance[jpeg_chrominance_table_length];
uint8_t jpeg_data[];
} jpeg_packet_with_quantization_t;
typedef struct __attribute__((packed))
{
rtp_over_tcp_hdr_t rtp_over_tcp_hdr;
rtp_hdr_t rtp_hdr;
jpeg_hdr_t jpeg_hdr;
uint8_t jpeg_data[];
} jpeg_packet_t;
}; };

21
lib/micro-rtsp-server/src/micro_rtsp_server.cpp
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@@ -1,12 +1,13 @@
#include <micro_rtsp_server.h> #include <micro_rtsp_server.h>
#include <jpg.h>
#include <vector> #include <vector>
#include <memory> #include <memory>
// Check client connections every 100 milliseconds // Check client connections every 100 milliseconds
#define CHECK_CLIENT_INTERVAL 10 #define CHECK_CLIENT_INTERVAL 10
micro_rtsp_server::micro_rtsp_server(const micro_rtsp_camera &source, unsigned frame_interval /*= 100*/) micro_rtsp_server::micro_rtsp_server(micro_rtsp_camera &source, unsigned frame_interval /*= 100*/)
: source_(source) : source_(source), streamer_(source.width(), source.height())
{ {
log_i("starting RTSP server"); log_i("starting RTSP server");
frame_interval_ = frame_interval; frame_interval_ = frame_interval;
@@ -51,11 +52,27 @@ void micro_rtsp_server::loop()
if (next_frame_update_ < now) if (next_frame_update_ < now)
{ {
next_frame_update_ = now + frame_interval_; next_frame_update_ = now + frame_interval_;
auto ts = time(nullptr);
// Get next jpg frame
source_.update_frame();
// Decode to get quantitation- and scan data
jpg jpg;
auto jpg_data = source_.data();
auto jpg_size = source_.size();
assert(jpg.decode(jpg_data, jpg_size));
auto jpg_scan_current = (uint8_t*)jpg.jpeg_data_start;
while (jpg_scan_current < jpg.jpeg_data_end)
{
auto packet = streamer_.create_jpg_packet(jpg.jpeg_data_start, jpg.jpeg_data_end, &jpg_scan_current, ts, jpg.quantization_table_luminance_->data, jpg.quantization_table_chrominance_->data);
for (auto client : clients_) for (auto client : clients_)
{ {
; ;
// client->session->broadcastCurrentFrame(now); // client->session->broadcastCurrentFrame(now);
} }
free(packet);
}
} }
} }

201
lib/micro-rtsp-server/src/micro_rtsp_streamer.cpp
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@@ -1,164 +1,89 @@
#include <stddef.h> #include <stddef.h>
#include <memory.h> #include <memory.h>
#include <esp32-hal-log.h>
#include "micro_rtsp_streamer.h" #include "micro_rtsp_streamer.h"
#include "esp_random.h" #include "esp_random.h"
// https://github.com/txgcwm/Linux-C-Examples/blob/master/h264/h264dec/rtcp.h
#define RTP_PAYLOAD_JPG 26
// RTP data header (http://www.ietf.org/rfc/rfc3550.txt)
struct rtp_hdr
{
uint16_t version : 2; // protocol version
uint16_t p : 1; // padding flag
uint16_t x : 1; // header extension flag
uint16_t cc : 4; // CSRC count
uint16_t m : 1; // marker bit
uint16_t pt : 7; // payload type
uint16_t seq : 16; // sequence number
uint32_t ts; // timestamp
uint32_t ssrc; // synchronization source
uint32_t csrc[]; // optional CSRC list
} rtp_hdr;
// https://datatracker.ietf.org/doc/html/rfc2435
// The following definition is from RFC1890
#define RTP_PT_JPEG 26
struct jpeghdr
{
uint32_t tspec : 8; // type-specific field
uint32_t off : 24; // fragment byte offset
uint8_t type; // id of jpeg decoder params
uint8_t q; // quantization factor (or table id)
uint8_t width; // frame width in 8 pixel blocks
uint8_t height; // frame height in 8 pixel blocks
};
struct jpeghdr_rst
{
uint16_t dri;
uint16_t f : 1;
uint16_t l : 1;
uint16_t count : 14;
};
struct jpeghdr_qtable
{
uint8_t mbz;
uint8_t precision;
uint16_t length;
};
#define RTP_JPEG_RESTART 0x40
micro_rtsp_streamer::micro_rtsp_streamer(const uint16_t width, const uint16_t height) micro_rtsp_streamer::micro_rtsp_streamer(const uint16_t width, const uint16_t height)
{ {
width_ = width; width_ = width;
height_ = height; height_ = height;
// Random number // Random number
ssrc_ = esp_random(); ssrc_ = esp_random();
sequenceNumber_ = 0; sequence_number_ = 0;
} }
#define MAX_ESP32_MTU 1440 rtp_over_tcp_hdr_t *micro_rtsp_streamer::create_jpg_packet(const uint8_t *jpg_scan, const uint8_t *jpg_scan_end, uint8_t **jpg_offset, const uint32_t timestamp, const uint8_t* quantization_table_luminance, const uint8_t* quantization_table_chrominance)
size_t micro_rtsp_streamer::create_jpg_packet(const uint8_t *jpg, uint8_t **jpg_current, const uint8_t *jpg_end, const uint32_t timestamp)
{ {
const int MAX_FRAGMENT_SIZE = 1100; // FIXME, pick more carefully // The MTU of wireless networks is 2,312 bytes. This size includes the packet headers.
int fragmentLen = MAX_FRAGMENT_SIZE; const auto isFirstFragment = jpg_scan == *jpg_offset;
auto jpegLen = jpg_end - *jpg_current; const auto include_quantization_tables = isFirstFragment && quantization_table_luminance != nullptr && quantization_table_chrominance != nullptr;
// Quantization tables musty be included in the first packet
const auto headers_size = include_quantization_tables ? sizeof(jpeg_packet_with_quantization_t) : sizeof(jpeg_packet_t);
const auto payload_size = max_wifi_mtu - headers_size;
auto offset = *jpg_current - jpg; const auto jpg_bytes_left = jpg_scan_end - *jpg_offset;
if (fragmentLen + offset > jpegLen) // Shrink last fragment if needed const bool isLastFragment = jpg_bytes_left <= payload_size;
fragmentLen = jpegLen - offset; const auto jpg_bytes = isLastFragment ? jpg_bytes_left : payload_size;
const uint16_t packet_size = headers_size + jpg_bytes;
// bool isLastFragment = (fragmentOffset + fragmentLen) == jpegLen; const auto packet = (jpeg_packet_t *)calloc(1, packet_size);
struct rtp_hdr header = { // 4 bytes RTP over TCP header
.version = 2, assert(4 == sizeof(rtp_over_tcp_hdr_t));
.m = 1, // TODO = 1 if last fragfment packet->rtp_over_tcp_hdr.magic = '$'; // encapsulation
.pt = RTP_PAYLOAD_JPG, packet->rtp_over_tcp_hdr.channel = 0; // number of multiplexed sub-channel on RTPS connection - here the RTP channel
.seq = sequenceNumber_, packet->rtp_over_tcp_hdr.length = packet_size;
.ts = timestamp, log_v("rtp_over_tcp_hdr_t={.magic=%c,.channel=%i,.length=%i}", packet->rtp_over_tcp_hdr.magic, packet->rtp_over_tcp_hdr.channel, packet->rtp_over_tcp_hdr.length);
.ssrc = ssrc_};
struct jpeghdr jpghdr = { // 12 bytes RTP header
.tspec = 0, // type-specific field assert(12 == sizeof(rtp_hdr_t));
.off = offset, // fragment byte offset packet->rtp_hdr.version = 2;
.type = 0, // id of jpeg decoder params packet->rtp_hdr.marker = isLastFragment;
.q = 0x5e, // quantization factor (or table id) packet->rtp_hdr.pt = RTP_PAYLOAD_JPG;
.width = width_ >> 3, // frame width in 8 pixel blocks packet->rtp_hdr.seq = sequence_number_;
.height = height_ >> 3 // frame height in 8 pixel blocks packet->rtp_hdr.ts = timestamp;
}; packet->rtp_hdr.ssrc = ssrc_;
log_v("rtp_hdr={.version:%i,.padding:%i,.extension:%i,.cc:%i,.marker:%i,.pt:%i,.seq:%i,.ts:%u,.ssrc:%u}", packet->rtp_hdr.version, packet->rtp_hdr.padding, packet->rtp_hdr.extension, packet->rtp_hdr.cc, packet->rtp_hdr.marker, packet->rtp_hdr.pt, packet->rtp_hdr.seq, packet->rtp_hdr.ts, packet->rtp_hdr.ssrc);
uint8_t rtp_buffer[0x800]; // 8 bytes JPEG payload header
// memset(RtpBuf, 0x00, sizeof(RtpBuf)); assert(8 == sizeof(jpeg_hdr_t));
// Prepare the first 4 byte of the packet. This is the Rtp over Rtsp header in case of TCP based transport packet->jpeg_hdr.tspec = 0; // type-specific field
rtp_buffer[0] = (uint8_t)'$'; // magic number packet->jpeg_hdr.off = (uint32_t)(*jpg_offset - jpg_scan); // fragment byte offset (24 bits in jpg)
rtp_buffer[1] = 0; // number of multiplexed subchannel on RTPS connection - here the RTP channel packet->jpeg_hdr.type = 0; // id of jpeg decoder params
// rtp_buffer[2] = (RtpPacketSize & 0xFF00) >> 8; packet->jpeg_hdr.q = (uint8_t)(include_quantization_tables ? 0x80 : 0x5e); // quantization factor (or table id) 5eh=94d
// rtp_buffer[3] = (RtpPacketSize & 0x00FF); packet->jpeg_hdr.width = (uint8_t)(width_ >> 3); // frame width in 8 pixel blocks
// Prepare the 12 byte RTP header packet->jpeg_hdr.height = (uint8_t)(height_ >> 3); // frame height in 8 pixel blocks
// RtpBuf[4] = 0x80; // RTP version log_v("jpeg_hdr={.tspec:%i,.off:0x%6x,.type:0x2%x,.q:%i,.width:%i.height:%i}", packet->jpeg_hdr.tspec, packet->jpeg_hdr.off, packet->jpeg_hdr.type, packet->jpeg_hdr.q, packet->jpeg_hdr.width, packet->jpeg_hdr.height);
// RtpBuf[5] = 0x1a | (isLastFragment ? 0x80 : 0x00); // JPEG payload (26) and marker bit
// RtpBuf[7] = m_SequenceNumber & 0x0FF; // each packet is counted with a sequence counter
// RtpBuf[6] = m_SequenceNumber >> 8;
// RtpBuf[8] = (m_Timestamp & 0xFF000000) >> 24; // each image gets a timestamp
// RtpBuf[9] = (m_Timestamp & 0x00FF0000) >> 16;
// RtpBuf[10] = (m_Timestamp & 0x0000FF00) >> 8;
// RtpBuf[11] = (m_Timestamp & 0x000000FF);
// RtpBuf[12] = 0x13; // 4 byte SSRC (sychronization source identifier)
// RtpBuf[13] = 0xf9; // we just an arbitrary number here to keep it simple
// RtpBuf[14] = 0x7e;
// RtpBuf[15] = 0x67;
// Prepare the 8 byte payload JPEG header // length so far should be 24 bytes
// RtpBuf[16] = 0x00; // type specific assert(24 == sizeof(jpeg_packet_t));
// RtpBuf[17] = (fragmentOffset & 0x00FF0000) >> 16; // 3 byte fragmentation offset for fragmented images
// RtpBuf[18] = (fragmentOffset & 0x0000FF00) >> 8;
// RtpBuf[19] = (fragmentOffset & 0x000000FF);
// /* These sampling factors indicate that the chrominance components of if (include_quantization_tables)
// type 0 video is downsampled horizontally by 2 (often called 4:2:2) {
// while the chrominance components of type 1 video are downsampled both const auto packet_with_quantization = (jpeg_packet_with_quantization_t *)packet;
// horizontally and vertically by 2 (often called 4:2:0). */ assert(4 == sizeof(jpeg_hdr_qtable_t));
// RtpBuf[20] = 0x00; // type (fixme might be wrong for camera data) https://tools.ietf.org/html/rfc2435 // Only in first packet of the frame
// RtpBuf[21] = q; // quality scale factor was 0x5e packet_with_quantization->jpeg_hdr_qtable.mbz = 0;
// RtpBuf[22] = width_ / 8; // width / 8 packet_with_quantization->jpeg_hdr_qtable.precision = 0; // 8 bit precision
// RtpBuf[23] = height_ / 8; // height / 8 packet_with_quantization->jpeg_hdr_qtable.length = jpeg_luminance_table_length + jpeg_chrominance_table_length;
log_v("jpeg_hdr_qtable={.mbz:%i,.precision:%i,.length:%d}", packet_with_quantization->jpeg_hdr_qtable.mbz, packet_with_quantization->jpeg_hdr_qtable.precision, packet_with_quantization->jpeg_hdr_qtable.length);
int headerLen = 24; // Including jpeg header but not qant table header memcpy(packet_with_quantization->quantization_table_luminance, quantization_table_luminance, jpeg_luminance_table_length);
if (includeQuantTbl) memcpy(packet_with_quantization->quantization_table_chrominance, quantization_table_chrominance, jpeg_chrominance_table_length);
{ // we need a quant header - but only in first packet of the frame // Copy JPG data
// printf("inserting quanttbl\n"); memcpy(packet_with_quantization->jpeg_data, *jpg_offset, jpg_bytes);
RtpBuf[24] = 0; // MBZ }
RtpBuf[25] = 0; // 8 bit precision else
RtpBuf[26] = 0; // MSB of lentgh {
// Copy JPG data
int numQantBytes = 64; // Two 64 byte tables memcpy(packet->jpeg_data, *jpg_offset, jpg_bytes);
RtpBuf[27] = 2 * numQantBytes; // LSB of length
headerLen += 4;
memcpy(RtpBuf + headerLen, quant0tbl, numQantBytes);
headerLen += numQantBytes;
memcpy(RtpBuf + headerLen, quant1tbl, numQantBytes);
headerLen += numQantBytes;
} }
// printf("Sending timestamp %d, seq %d, fragoff %d, fraglen %d, jpegLen %d\n", m_Timestamp, m_SequenceNumber, fragmentOffset, fragmentLen, jpegLen);
// append the JPEG scan data to the RTP buffer // Update JPG offset
memcpy(RtpBuf + headerLen, jpeg + fragmentOffset, fragmentLen); *jpg_offset += jpg_bytes;
fragmentOffset += fragmentLen; // Update sequence number
sequence_number_++;
m_SequenceNumber++; // prepare the packet counter for the next packet return (rtp_over_tcp_hdr_t*)packet;
IPADDRESS otherip;
IPPORT otherport;
socketpeeraddr(m_Client, &otherip, &otherport);
} }

2
platformio.ini
View File

@@ -10,7 +10,7 @@
############################################################################### ###############################################################################
[platformio] [platformio]
#default_envs = esp32cam_ai_thinker default_envs = esp32cam_ai_thinker
#default_envs = esp32cam_espressif_esp_eye #default_envs = esp32cam_espressif_esp_eye
#default_envs = esp32cam_espressif_esp32s2_cam_board #default_envs = esp32cam_espressif_esp32s2_cam_board
#default_envs = esp32cam_espressif_esp32s2_cam_header #default_envs = esp32cam_espressif_esp32s2_cam_header

8
test/test_main.cpp
View File

@@ -71,12 +71,12 @@ void test_jpg_decode()
TEST_ASSERT_EQUAL_UINT8_ARRAY(jpeg_data, mr_jpeg.jpeg_data_start, sizeof(jpeg_data)); TEST_ASSERT_EQUAL_UINT8_ARRAY(jpeg_data, mr_jpeg.jpeg_data_start, sizeof(jpeg_data));
// Id is not stored // Id is not stored
TEST_ASSERT_EQUAL_INT32(sizeof(jpg_section_dqt::id) + sizeof(jpeg_qtable0), mr_jpeg.quantization_table_0_->data_length()); TEST_ASSERT_EQUAL_INT32(sizeof(jpg_section_dqt_t::id) + sizeof(jpeg_qtable0), mr_jpeg.quantization_table_luminance_->data_length());
auto jpg_section_dqt_luminance = reinterpret_cast<const struct jpg_section_dqt *>(mr_jpeg.quantization_table_0_->data); auto jpg_section_dqt_luminance = reinterpret_cast<const jpg_section_dqt_t *>(mr_jpeg.quantization_table_luminance_->data);
TEST_ASSERT_EQUAL_UINT8_ARRAY(jpeg_qtable0, jpg_section_dqt_luminance->data, sizeof(jpeg_qtable0)); TEST_ASSERT_EQUAL_UINT8_ARRAY(jpeg_qtable0, jpg_section_dqt_luminance->data, sizeof(jpeg_qtable0));
// Id is not stored // Id is not stored
TEST_ASSERT_EQUAL_INT32(sizeof(jpg_section_dqt::id) + sizeof(jpeg_qtable1), mr_jpeg.quantization_table_1_->data_length()); TEST_ASSERT_EQUAL_INT32(sizeof(jpg_section_dqt_t::id) + sizeof(jpeg_qtable1), mr_jpeg.quantization_table_chrominance_->data_length());
auto jpg_section_dqt_chrominance = reinterpret_cast<const struct jpg_section_dqt *>(mr_jpeg.quantization_table_1_->data); auto jpg_section_dqt_chrominance = reinterpret_cast<const jpg_section_dqt_t *>(mr_jpeg.quantization_table_chrominance_->data);
TEST_ASSERT_EQUAL_UINT8_ARRAY(jpeg_qtable1, jpg_section_dqt_chrominance->data, sizeof(jpeg_qtable1)); TEST_ASSERT_EQUAL_UINT8_ARRAY(jpeg_qtable1, jpg_section_dqt_chrominance->data, sizeof(jpeg_qtable1));
} }