content/media/fmp4/demuxer/audio_decoder_config.cc@44a2da4a2ab2 (annotated)
content/media/fmp4/demuxer/audio_decoder_config.cc
Fri, 16 Jan 2015 04:50:19 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 16 Jan 2015 04:50:19 +0100
- branch
- TOR_BUG_9701
- changeset 13
- 44a2da4a2ab2
- permissions
- -rw-r--r--
Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32
| michael@0 | 1 | // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| michael@0 | 2 | // Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 3 | // found in the LICENSE file. |
| michael@0 | 4 | |
| michael@0 | 5 | #include "mp4_demuxer/audio_decoder_config.h" |
| michael@0 | 6 | |
| michael@0 | 7 | #include <sstream> |
| michael@0 | 8 | #include <string.h> |
| michael@0 | 9 | |
| michael@0 | 10 | namespace mp4_demuxer { |
| michael@0 | 11 | |
| michael@0 | 12 | static int SampleFormatToBitsPerChannel(SampleFormat sample_format) { |
| michael@0 | 13 | switch (sample_format) { |
| michael@0 | 14 | case kUnknownSampleFormat: |
| michael@0 | 15 | return 0; |
| michael@0 | 16 | case kSampleFormatU8: |
| michael@0 | 17 | return 8; |
| michael@0 | 18 | case kSampleFormatS16: |
| michael@0 | 19 | case kSampleFormatPlanarS16: |
| michael@0 | 20 | return 16; |
| michael@0 | 21 | case kSampleFormatS32: |
| michael@0 | 22 | case kSampleFormatF32: |
| michael@0 | 23 | case kSampleFormatPlanarF32: |
| michael@0 | 24 | return 32; |
| michael@0 | 25 | case kSampleFormatMax: |
| michael@0 | 26 | break; |
| michael@0 | 27 | } |
| michael@0 | 28 | |
| michael@0 | 29 | //NOTREACHED() << "Invalid sample format provided: " << sample_format; |
| michael@0 | 30 | return 0; |
| michael@0 | 31 | } |
| michael@0 | 32 | |
| michael@0 | 33 | AudioDecoderConfig::AudioDecoderConfig() |
| michael@0 | 34 | : codec_(kUnknownAudioCodec), |
| michael@0 | 35 | sample_format_(kUnknownSampleFormat), |
| michael@0 | 36 | bits_per_channel_(0), |
| michael@0 | 37 | channel_layout_(CHANNEL_LAYOUT_UNSUPPORTED), |
| michael@0 | 38 | samples_per_second_(0), |
| michael@0 | 39 | bytes_per_frame_(0), |
| michael@0 | 40 | is_encrypted_(false) { |
| michael@0 | 41 | } |
| michael@0 | 42 | |
| michael@0 | 43 | AudioDecoderConfig::AudioDecoderConfig(AudioCodec codec, |
| michael@0 | 44 | SampleFormat sample_format, |
| michael@0 | 45 | ChannelLayout channel_layout, |
| michael@0 | 46 | int samples_per_second, |
| michael@0 | 47 | const uint8_t* extra_data, |
| michael@0 | 48 | size_t extra_data_size, |
| michael@0 | 49 | bool is_encrypted) { |
| michael@0 | 50 | Initialize(codec, sample_format, channel_layout, samples_per_second, |
| michael@0 | 51 | extra_data, extra_data_size, is_encrypted); |
| michael@0 | 52 | } |
| michael@0 | 53 | |
| michael@0 | 54 | void AudioDecoderConfig::Initialize(AudioCodec codec, |
| michael@0 | 55 | SampleFormat sample_format, |
| michael@0 | 56 | ChannelLayout channel_layout, |
| michael@0 | 57 | int samples_per_second, |
| michael@0 | 58 | const uint8_t* extra_data, |
| michael@0 | 59 | size_t extra_data_size, |
| michael@0 | 60 | bool is_encrypted) { |
| michael@0 | 61 | CHECK((extra_data_size != 0) == (extra_data != NULL)); |
| michael@0 | 62 | |
| michael@0 | 63 | codec_ = codec; |
| michael@0 | 64 | channel_layout_ = channel_layout; |
| michael@0 | 65 | samples_per_second_ = samples_per_second; |
| michael@0 | 66 | sample_format_ = sample_format; |
| michael@0 | 67 | bits_per_channel_ = SampleFormatToBitsPerChannel(sample_format); |
| michael@0 | 68 | extra_data_.assign(extra_data, extra_data + extra_data_size); |
| michael@0 | 69 | is_encrypted_ = is_encrypted; |
| michael@0 | 70 | |
| michael@0 | 71 | int channels = ChannelLayoutToChannelCount(channel_layout_); |
| michael@0 | 72 | bytes_per_frame_ = channels * bits_per_channel_ / 8; |
| michael@0 | 73 | } |
| michael@0 | 74 | |
| michael@0 | 75 | AudioDecoderConfig::~AudioDecoderConfig() {} |
| michael@0 | 76 | |
| michael@0 | 77 | bool AudioDecoderConfig::IsValidConfig() const { |
| michael@0 | 78 | return codec_ != kUnknownAudioCodec && |
| michael@0 | 79 | channel_layout_ != CHANNEL_LAYOUT_UNSUPPORTED && |
| michael@0 | 80 | bits_per_channel_ > 0 && |
| michael@0 | 81 | bits_per_channel_ <= kMaxBitsPerSample && |
| michael@0 | 82 | samples_per_second_ > 0 && |
| michael@0 | 83 | samples_per_second_ <= kMaxSampleRate && |
| michael@0 | 84 | sample_format_ != kUnknownSampleFormat; |
| michael@0 | 85 | } |
| michael@0 | 86 | |
| michael@0 | 87 | bool AudioDecoderConfig::Matches(const AudioDecoderConfig& config) const { |
| michael@0 | 88 | return ((codec() == config.codec()) && |
| michael@0 | 89 | (bits_per_channel() == config.bits_per_channel()) && |
| michael@0 | 90 | (channel_layout() == config.channel_layout()) && |
| michael@0 | 91 | (samples_per_second() == config.samples_per_second()) && |
| michael@0 | 92 | (extra_data_size() == config.extra_data_size()) && |
| michael@0 | 93 | (!extra_data() || !memcmp(extra_data(), config.extra_data(), |
| michael@0 | 94 | extra_data_size())) && |
| michael@0 | 95 | (is_encrypted() == config.is_encrypted()) && |
| michael@0 | 96 | (sample_format() == config.sample_format())); |
| michael@0 | 97 | } |
| michael@0 | 98 | |
| michael@0 | 99 | std::string AudioDecoderConfig::AsHumanReadableString() const { |
| michael@0 | 100 | std::ostringstream s; |
| michael@0 | 101 | s << "codec: " << codec() |
| michael@0 | 102 | << " bits/channel: " << bits_per_channel() |
| michael@0 | 103 | << " samples/s: " << samples_per_second() |
| michael@0 | 104 | << " has extra data? " << (extra_data() ? "true" : "false") |
| michael@0 | 105 | << " encrypted? " << (is_encrypted() ? "true" : "false"); |
| michael@0 | 106 | return s.str(); |
| michael@0 | 107 | } |
| michael@0 | 108 | |
| michael@0 | 109 | } // namespace mp4_demuxer |
