109 lines
2.9 KiB
C++
109 lines
2.9 KiB
C++
/*
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* Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/test/rtp_file_writer.h"
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#include <stdio.h>
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#include <string>
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#include "webrtc/base/checks.h"
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#include "webrtc/base/constructormagic.h"
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namespace webrtc {
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namespace test {
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static const uint16_t kPacketHeaderSize = 8;
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static const char kFirstLine[] = "#!rtpplay1.0 0.0.0.0/0\n";
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// Write RTP packets to file in rtpdump format, as documented at:
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// http://www.cs.columbia.edu/irt/software/rtptools/
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class RtpDumpWriter : public RtpFileWriter {
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public:
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explicit RtpDumpWriter(FILE* file) : file_(file) {
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RTC_CHECK(file_ != NULL);
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Init();
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}
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virtual ~RtpDumpWriter() {
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if (file_ != NULL) {
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fclose(file_);
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file_ = NULL;
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}
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}
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bool WritePacket(const RtpPacket* packet) override {
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uint16_t len = static_cast<uint16_t>(packet->length + kPacketHeaderSize);
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uint16_t plen = static_cast<uint16_t>(packet->original_length);
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uint32_t offset = packet->time_ms;
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RTC_CHECK(WriteUint16(len));
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RTC_CHECK(WriteUint16(plen));
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RTC_CHECK(WriteUint32(offset));
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return fwrite(packet->data, sizeof(uint8_t), packet->length, file_) ==
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packet->length;
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}
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private:
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bool Init() {
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fprintf(file_, "%s", kFirstLine);
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RTC_CHECK(WriteUint32(0));
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RTC_CHECK(WriteUint32(0));
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RTC_CHECK(WriteUint32(0));
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RTC_CHECK(WriteUint16(0));
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RTC_CHECK(WriteUint16(0));
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return true;
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}
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bool WriteUint32(uint32_t in) {
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// Loop through shifts = {24, 16, 8, 0}.
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for (int shifts = 24; shifts >= 0; shifts -= 8) {
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uint8_t tmp = static_cast<uint8_t>((in >> shifts) & 0xFF);
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if (fwrite(&tmp, sizeof(uint8_t), 1, file_) != 1)
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return false;
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}
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return true;
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}
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bool WriteUint16(uint16_t in) {
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// Write 8 MSBs.
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uint8_t tmp = static_cast<uint8_t>((in >> 8) & 0xFF);
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if (fwrite(&tmp, sizeof(uint8_t), 1, file_) != 1)
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return false;
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// Write 8 LSBs.
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tmp = static_cast<uint8_t>(in & 0xFF);
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if (fwrite(&tmp, sizeof(uint8_t), 1, file_) != 1)
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return false;
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return true;
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}
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FILE* file_;
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RTC_DISALLOW_COPY_AND_ASSIGN(RtpDumpWriter);
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};
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RtpFileWriter* RtpFileWriter::Create(FileFormat format,
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const std::string& filename) {
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FILE* file = fopen(filename.c_str(), "wb");
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if (file == NULL) {
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printf("ERROR: Can't open file: %s\n", filename.c_str());
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return NULL;
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}
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switch (format) {
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case kRtpDump:
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return new RtpDumpWriter(file);
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}
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fclose(file);
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return NULL;
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}
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} // namespace test
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} // namespace webrtc
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