145 lines
4.4 KiB
C++
145 lines
4.4 KiB
C++
// 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 "packager/media/base/audio_stream_info.h"
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#include <inttypes.h>
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#include "packager/base/logging.h"
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#include "packager/base/strings/string_number_conversions.h"
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#include "packager/base/strings/stringprintf.h"
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#include "packager/media/base/limits.h"
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namespace shaka {
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namespace media {
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namespace {
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std::string AudioCodecToString(AudioCodec audio_codec) {
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switch (audio_codec) {
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case kCodecAAC:
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return "AAC";
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case kCodecAC3:
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return "AC3";
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case kCodecDTSC:
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return "DTSC";
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case kCodecDTSE:
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return "DTSE";
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case kCodecDTSH:
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return "DTSH";
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case kCodecDTSL:
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return "DTSL";
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case kCodecDTSM:
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return "DTS-";
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case kCodecDTSP:
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return "DTS+";
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case kCodecEAC3:
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return "EAC3";
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case kCodecOpus:
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return "Opus";
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case kCodecVorbis:
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return "Vorbis";
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default:
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NOTIMPLEMENTED() << "Unknown Audio Codec: " << audio_codec;
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return "UnknownAudioCodec";
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}
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}
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} // namespace
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AudioStreamInfo::AudioStreamInfo(int track_id,
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uint32_t time_scale,
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uint64_t duration,
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AudioCodec codec,
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const std::string& codec_string,
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const std::string& language,
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uint8_t sample_bits,
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uint8_t num_channels,
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uint32_t sampling_frequency,
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uint64_t seek_preroll_ns,
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uint64_t codec_delay_ns,
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uint32_t max_bitrate,
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uint32_t avg_bitrate,
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const uint8_t* extra_data,
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size_t extra_data_size,
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bool is_encrypted)
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: StreamInfo(kStreamAudio,
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track_id,
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time_scale,
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duration,
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codec_string,
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language,
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extra_data,
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extra_data_size,
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is_encrypted),
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codec_(codec),
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sample_bits_(sample_bits),
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num_channels_(num_channels),
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sampling_frequency_(sampling_frequency),
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seek_preroll_ns_(seek_preroll_ns),
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codec_delay_ns_(codec_delay_ns),
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max_bitrate_(max_bitrate),
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avg_bitrate_(avg_bitrate) {}
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AudioStreamInfo::~AudioStreamInfo() {}
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bool AudioStreamInfo::IsValidConfig() const {
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return codec_ != kUnknownAudioCodec && num_channels_ != 0 &&
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num_channels_ <= limits::kMaxChannels && sample_bits_ > 0 &&
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sample_bits_ <= limits::kMaxBitsPerSample &&
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sampling_frequency_ > 0 &&
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sampling_frequency_ <= limits::kMaxSampleRate;
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}
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std::string AudioStreamInfo::ToString() const {
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std::string str = base::StringPrintf(
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"%s codec: %s\n sample_bits: %d\n num_channels: %d\n "
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"sampling_frequency: %d\n language: %s\n",
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StreamInfo::ToString().c_str(), AudioCodecToString(codec_).c_str(),
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sample_bits_, num_channels_, sampling_frequency_, language().c_str());
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if (seek_preroll_ns_ != 0) {
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base::StringAppendF(&str, " seek_preroll_ns: %" PRIu64 "\n",
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seek_preroll_ns_);
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}
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if (codec_delay_ns_ != 0) {
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base::StringAppendF(&str, " codec_delay_ns: %" PRIu64 "\n",
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codec_delay_ns_);
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}
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return str;
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}
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std::string AudioStreamInfo::GetCodecString(AudioCodec codec,
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uint8_t audio_object_type) {
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switch (codec) {
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case kCodecVorbis:
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return "vorbis";
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case kCodecOpus:
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return "opus";
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case kCodecAAC:
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return "mp4a.40." + base::UintToString(audio_object_type);
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case kCodecDTSC:
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return "dtsc";
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case kCodecDTSH:
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return "dtsh";
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case kCodecDTSL:
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return "dtsl";
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case kCodecDTSE:
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return "dtse";
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case kCodecDTSP:
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return "dts+";
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case kCodecDTSM:
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return "dts-";
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case kCodecAC3:
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return "ac-3";
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case kCodecEAC3:
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return "ec-3";
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default:
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NOTIMPLEMENTED() << "Codec: " << codec;
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return "unknown";
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}
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}
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} // namespace media
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} // namespace shaka
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