video size MUST be exactly 480x640 pixels, portait format, suited for cellphone cameras. video sending 1 frame per 100 milliseconds (~10 fps) (approximately), but NOT more often.
40000 max bytes length for custom lossless NGC packets.
37000 max bytes length for video frames and header, to leave some space for $whatever here be dragons later
| what | Length in bytes | Contents |
|---|---|---|
| magic | 6 | 0x667788113435 |
| version | 1 | 0x02 |
| pkt id | 1 | 0x21 |
| video width | 1 | uint8_t always 224 (8bit of 480) |
| video height | 1 | uint8_t always 128 (8bit of 640) |
| video codec | 1 | uint8_t always 1 (1 -> H264) |
| seq number | 2 | uint16_t video frame sequence number (rolls over) in little endian |
| chksum | 1 | uint8_t 8 bit CRC checksum over data |
| data | [1, 36986] | *uint8_t bytes, zero not allowed! |
header size: 14 bytes
data size: 1 - 36986 bytes
do this globally, so you can only send/receive video for 1 NGC group at a time!
void* toxav_ngc_video_init(const uint16_t v_bitrate, const uint16_t max_quantizer);
bool toxav_ngc_video_encode(void *vngc, const uint16_t vbitrate, const uint16_t width, const uint16_t height,
const uint8_t *y, const uint8_t *u, const uint8_t *v,
uint8_t *encoded_frame_bytes, uint32_t *encoded_frame_size_bytes);
bool toxav_ngc_video_decode(void *vngc, uint8_t *encoded_frame_bytes, uint32_t encoded_frame_size_bytes,
uint16_t width, uint16_t height,
uint8_t *y, uint8_t *u, uint8_t *v,
int32_t *ystride, int32_t *ustride, int32_t *vstride);
void toxav_ngc_video_kill(void *vngc);use tox_group_send_custom_packet() and lossless set to true to send video data
unless the packet size including header is less than TOX_MAX_CUSTOM_PACKET_SIZE,
then send with lossless set to false.
and tox_group_custom_private_packet_cb() to receive video data.