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use {
super::{define::FlvDemuxerData, errors::MediaError, m3u8::M3u8},
bytes::BytesMut,
xflv::{
define::{frame_type, FlvData},
demuxer::{FlvAudioTagDemuxer, FlvVideoTagDemuxer},
},
xmpegts::{
define::{epsi_stream_type, MPEG_FLAG_IDR_FRAME},
ts::TsMuxer,
},
};
pub struct Flv2HlsRemuxer {
video_demuxer: FlvVideoTagDemuxer,
audio_demuxer: FlvAudioTagDemuxer,
ts_muxer: TsMuxer,
last_ts_dts: i64,
last_ts_pts: i64,
last_dts: i64,
last_pts: i64,
duration: i64,
need_new_segment: bool,
video_pid: u16,
audio_pid: u16,
m3u8_handler: M3u8,
}
impl Flv2HlsRemuxer {
pub fn new(duration: i64, app_name: String, stream_name: String) -> Self {
let mut ts_muxer = TsMuxer::new();
let audio_pid = ts_muxer
.add_stream(epsi_stream_type::PSI_STREAM_AAC, BytesMut::new())
.unwrap();
let video_pid = ts_muxer
.add_stream(epsi_stream_type::PSI_STREAM_H264, BytesMut::new())
.unwrap();
let m3u8_name = format!("{stream_name}.m3u8");
Self {
video_demuxer: FlvVideoTagDemuxer::new(),
audio_demuxer: FlvAudioTagDemuxer::new(),
ts_muxer,
last_ts_dts: 0,
last_ts_pts: 0,
last_dts: 0,
last_pts: 0,
duration,
need_new_segment: false,
video_pid,
audio_pid,
m3u8_handler: M3u8::new(duration, 6, m3u8_name, app_name, stream_name),
}
}
pub fn process_flv_data(&mut self, data: FlvData) -> Result<(), MediaError> {
let flv_demux_data: FlvDemuxerData = match data {
FlvData::Audio { timestamp, data } => {
let audio_data = self.audio_demuxer.demux(timestamp, data)?;
FlvDemuxerData::Audio { data: audio_data }
}
FlvData::Video { timestamp, data } => {
let video_data = self.video_demuxer.demux(timestamp, data)?;
FlvDemuxerData::Video { data: video_data }
}
_ => return Ok(()),
};
self.process_demux_data(&flv_demux_data)?;
Ok(())
}
pub fn flush_remaining_data(&mut self) -> Result<(), MediaError> {
let data = self.ts_muxer.get_data();
let mut discontinuity: bool = false;
if self.last_dts > self.last_ts_dts + 15 * 1000 {
discontinuity = true;
}
self.m3u8_handler.add_segment(
self.last_dts - self.last_ts_dts,
discontinuity,
true,
data,
)?;
self.m3u8_handler.refresh_playlist()?;
Ok(())
}
pub fn process_demux_data(
&mut self,
flv_demux_data: &FlvDemuxerData,
) -> Result<(), MediaError> {
self.need_new_segment = false;
let pid: u16;
let pts: i64;
let dts: i64;
let mut flags: u16 = 0;
let mut payload: BytesMut = BytesMut::new();
match flv_demux_data {
FlvDemuxerData::Video { data } => {
if !data.has_data {
return Ok(());
}
pts = data.pts;
dts = data.dts;
pid = self.video_pid;
payload.extend_from_slice(&data.data[..]);
if data.frame_type == frame_type::KEY_FRAME {
flags = MPEG_FLAG_IDR_FRAME;
if dts - self.last_ts_dts >= self.duration * 1000 {
self.need_new_segment = true;
}
}
}
FlvDemuxerData::Audio { data } => {
if !data.has_data {
return Ok(());
}
pts = data.pts;
dts = data.dts;
pid = self.audio_pid;
payload.extend_from_slice(&data.data[..]);
}
_ => return Ok(()),
}
if self.need_new_segment {
let mut discontinuity: bool = false;
if dts > self.last_ts_dts + 15 * 1000 {
discontinuity = true;
}
let data = self.ts_muxer.get_data();
self.m3u8_handler
.add_segment(dts - self.last_ts_dts, discontinuity, false, data)?;
self.m3u8_handler.refresh_playlist()?;
self.ts_muxer.reset();
self.last_ts_dts = dts;
self.last_ts_pts = pts;
self.need_new_segment = false;
}
self.last_dts = dts;
self.last_pts = pts;
self.ts_muxer
.write(pid, pts * 90, dts * 90, flags, payload)?;
Ok(())
}
pub fn clear_files(&mut self) -> Result<(), MediaError> {
self.m3u8_handler.clear()
}
}