123 lines
3.4 KiB
C++
123 lines
3.4 KiB
C++
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// Copyright 2014 Google Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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#include "app/stream_descriptor.h"
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#include "app/packager_util.h"
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#include "base/logging.h"
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#include "base/strings/string_number_conversions.h"
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#include "base/strings/string_split.h"
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namespace media {
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namespace {
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enum FieldType {
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kUnknownField = 0,
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kStreamSelectorField,
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kInputField,
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kOutputField,
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kSegmentTemplateField,
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kBandwidthField,
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};
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struct FieldNameToTypeMapping {
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const char* field_name;
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FieldType field_type;
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};
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const FieldNameToTypeMapping kFieldNameTypeMappings[] = {
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{ "stream_selector", kStreamSelectorField },
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{ "stream", kStreamSelectorField },
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{ "input", kInputField },
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{ "in", kInputField },
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{ "output", kOutputField },
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{ "out", kOutputField },
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{ "init_segment", kOutputField },
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{ "segment_template", kSegmentTemplateField },
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{ "template", kSegmentTemplateField },
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{ "bandwidth", kBandwidthField },
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{ "bw", kBandwidthField },
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{ "bitrate", kBandwidthField },
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};
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FieldType GetFieldType(const std::string& field_name) {
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for (size_t idx = 0; idx < arraysize(kFieldNameTypeMappings); ++idx) {
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if (field_name == kFieldNameTypeMappings[idx].field_name)
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return kFieldNameTypeMappings[idx].field_type;
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}
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return kUnknownField;
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}
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} // anonymous namespace
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StreamDescriptor::StreamDescriptor() : bandwidth(0) {}
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StreamDescriptor::~StreamDescriptor() {}
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bool InsertStreamDescriptor(const std::string& descriptor_string,
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StreamDescriptorList* descriptor_list) {
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StreamDescriptor descriptor;
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// Split descriptor string into name/value pairs.
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base::StringPairs pairs;
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if (!base::SplitStringIntoKeyValuePairs(descriptor_string,
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'=',
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',',
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&pairs)) {
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LOG(ERROR) << "Invalid stream descriptors name/value pairs.";
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return false;
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}
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for (base::StringPairs::const_iterator iter = pairs.begin();
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iter != pairs.end(); ++iter) {
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switch (GetFieldType(iter->first)) {
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case kStreamSelectorField:
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descriptor.stream_selector = iter->second;
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break;
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case kInputField:
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descriptor.input = iter->second;
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break;
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case kOutputField:
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descriptor.output = iter->second;
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break;
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case kSegmentTemplateField:
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descriptor.segment_template = iter->second;
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break;
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case kBandwidthField: {
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unsigned bw;
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if (!base::StringToUint(iter->second, &bw)) {
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LOG(ERROR) << "Non-numeric bandwidth specified.";
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return false;
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}
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descriptor.bandwidth = bw;
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break;
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}
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default:
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LOG(ERROR) << "Unknown field in stream descriptor (\"" << iter->first
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<< "\").";
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return false;
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break;
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}
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}
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// Validate and insert the descriptor
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if (descriptor.input.empty()) {
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LOG(ERROR) << "Stream input not specified.";
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return false;
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}
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if (!FLAGS_dump_stream_info && descriptor.stream_selector.empty()) {
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LOG(ERROR) << "Stream stream_selector not specified.";
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return false;
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}
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if (!FLAGS_dump_stream_info && descriptor.output.empty()) {
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LOG(ERROR) << "Stream output not specified.";
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return false;
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}
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descriptor_list->insert(descriptor);
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return true;
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}
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} // namespace media
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