113 lines
2.8 KiB
C++
113 lines
2.8 KiB
C++
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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "media/webm/webm_audio_client.h"
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#include "media/base/audio_decoder_config.h"
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#include "media/base/channel_layout.h"
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#include "media/webm/webm_constants.h"
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namespace media {
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WebMAudioClient::WebMAudioClient(const LogCB& log_cb)
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: log_cb_(log_cb) {
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Reset();
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}
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WebMAudioClient::~WebMAudioClient() {
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}
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void WebMAudioClient::Reset() {
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channels_ = -1;
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samples_per_second_ = -1;
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output_samples_per_second_ = -1;
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}
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bool WebMAudioClient::InitializeConfig(
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const std::string& codec_id, const std::vector<uint8>& codec_private,
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bool is_encrypted, AudioDecoderConfig* config) {
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DCHECK(config);
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AudioCodec audio_codec = kUnknownAudioCodec;
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if (codec_id == "A_VORBIS") {
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audio_codec = kCodecVorbis;
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} else {
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MEDIA_LOG(log_cb_) << "Unsupported audio codec_id " << codec_id;
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return false;
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}
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if (samples_per_second_ <= 0)
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return false;
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// Set channel layout default if a Channels element was not present.
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if (channels_ == -1)
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channels_ = 1;
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ChannelLayout channel_layout = GuessChannelLayout(channels_);
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if (channel_layout == CHANNEL_LAYOUT_UNSUPPORTED) {
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MEDIA_LOG(log_cb_) << "Unsupported channel count " << channels_;
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return false;
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}
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int samples_per_second = samples_per_second_;
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if (output_samples_per_second_ > 0)
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samples_per_second = output_samples_per_second_;
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const uint8* extra_data = NULL;
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size_t extra_data_size = 0;
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if (codec_private.size() > 0) {
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extra_data = &codec_private[0];
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extra_data_size = codec_private.size();
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}
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config->Initialize(
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audio_codec, kSampleFormatPlanarF32, channel_layout,
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samples_per_second, extra_data, extra_data_size, is_encrypted, true);
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return config->IsValidConfig();
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}
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bool WebMAudioClient::OnUInt(int id, int64 val) {
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if (id == kWebMIdChannels) {
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if (channels_ != -1) {
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MEDIA_LOG(log_cb_) << "Multiple values for id " << std::hex << id
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<< " specified. (" << channels_ << " and " << val
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<< ")";
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return false;
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}
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channels_ = val;
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}
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return true;
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}
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bool WebMAudioClient::OnFloat(int id, double val) {
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double* dst = NULL;
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switch (id) {
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case kWebMIdSamplingFrequency:
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dst = &samples_per_second_;
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break;
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case kWebMIdOutputSamplingFrequency:
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dst = &output_samples_per_second_;
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break;
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default:
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return true;
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}
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if (val <= 0)
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return false;
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if (*dst != -1) {
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MEDIA_LOG(log_cb_) << "Multiple values for id " << std::hex << id
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<< " specified (" << *dst << " and " << val << ")";
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return false;
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}
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*dst = val;
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return true;
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}
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} // namespace media
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