110 lines
3.5 KiB
C++
110 lines
3.5 KiB
C++
/*
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* Copyright (c) 2016-present The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/ZLMediaKit/ZLMediaKit).
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*
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* Use of this source code is governed by MIT-like license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#include "TSDecoder.h"
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namespace mediakit {
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bool TSSegment::isTSPacket(const char *data, size_t len){
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return len == TS_PACKET_SIZE && ((uint8_t*)data)[0] == TS_SYNC_BYTE;
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}
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void TSSegment::setOnSegment(TSSegment::onSegment cb) {
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_onSegment = std::move(cb);
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}
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ssize_t TSSegment::onRecvHeader(const char *data, size_t len) {
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if (!isTSPacket(data, len)) {
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WarnL << "不是ts包:" << (int) (data[0]) << " " << len;
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return 0;
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}
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_onSegment(data, len);
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return 0;
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}
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const char *TSSegment::onSearchPacketTail(const char *data, size_t len) {
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if (len < _size + 1) {
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if (len == _size && ((uint8_t *) data)[0] == TS_SYNC_BYTE) {
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return data + _size;
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}
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return nullptr;
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}
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// 下一个包头 [AUTO-TRANSLATED:c653c49d]
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// Next packet header
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if (((uint8_t *) data)[_size] == TS_SYNC_BYTE) {
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return data + _size;
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}
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auto pos = memchr(data + _size, TS_SYNC_BYTE, len - _size);
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if (pos) {
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return (char *) pos;
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}
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if (remainDataSize() > 4 * _size) {
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// 数据这么多都没ts包，全部清空 [AUTO-TRANSLATED:95bece98]
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// So much data but no ts packets, clear all
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return data + len;
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}
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// 等待更多数据 [AUTO-TRANSLATED:b47fbc81]
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// Wait for more data
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return nullptr;
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}
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////////////////////////////////////////////////////////////////
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#if defined(ENABLE_HLS)
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#include "mpeg-ts.h"
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TSDecoder::TSDecoder() : _ts_segment() {
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_ts_segment.setOnSegment([this](const char *data, size_t len){
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ts_demuxer_input(_demuxer_ctx,(uint8_t*)data,len);
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});
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_demuxer_ctx = ts_demuxer_create([](void* param, int program, int stream, int codecid, int flags, int64_t pts, int64_t dts, const void* data, size_t bytes){
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TSDecoder *thiz = (TSDecoder*)param;
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if (thiz->_on_decode) {
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if (flags & MPEG_FLAG_PACKET_CORRUPT) {
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WarnL << "ts packet lost, dts:" << dts << " pts:" << pts << " bytes:" << bytes;
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} else {
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thiz->_on_decode(stream, codecid, flags, pts, dts, data, bytes);
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}
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}
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return 0;
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},this);
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ts_demuxer_notify_t notify = {
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[](void *param, int stream, int codecid, const void *extra, int bytes, int finish) {
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TSDecoder *thiz = (TSDecoder *) param;
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if (thiz->_on_stream) {
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thiz->_on_stream(stream, codecid, extra, bytes, finish);
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}
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}
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};
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ts_demuxer_set_notify((struct ts_demuxer_t *) _demuxer_ctx, ¬ify, this);
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}
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TSDecoder::~TSDecoder() {
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ts_demuxer_destroy(_demuxer_ctx);
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}
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ssize_t TSDecoder::input(const uint8_t *data, size_t bytes) {
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if (TSSegment::isTSPacket((char *)data, bytes)) {
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return ts_demuxer_input(_demuxer_ctx, (uint8_t *) data, bytes);
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}
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try {
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_ts_segment.input((char *) data, bytes);
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} catch (...) {
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// ts解析失败，清空缓存数据 [AUTO-TRANSLATED:18b3de5b]
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// ts parsing failed, clear cache data
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_ts_segment.reset();
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throw;
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}
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return bytes;
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}
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#endif//defined(ENABLE_HLS)
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}//namespace mediakit
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