1 files changed, 54 insertions, 0 deletions
diff --git a/media/formats/webm/webm_audio_client.h b/media/formats/webm/webm_audio_client.h
new file mode 100644
index 0000000..a723b0d
--- /dev/null
+++ b/media/formats/webm/webm_audio_client.h
@@ -0,0 +1,54 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MEDIA_FORMATS_WEBM_WEBM_AUDIO_CLIENT_H_
+#define MEDIA_FORMATS_WEBM_WEBM_AUDIO_CLIENT_H_
+
+#include <string>
+#include <vector>
+
+#include "media/base/media_log.h"
+#include "media/formats/webm/webm_parser.h"
+
+namespace media {
+class AudioDecoderConfig;
+
+// Helper class used to parse an Audio element inside a TrackEntry element.
+class WebMAudioClient : public WebMParserClient {
+ public:
+  explicit WebMAudioClient(const LogCB& log_cb);
+  virtual ~WebMAudioClient();
+
+  // Reset this object's state so it can process a new audio track element.
+  void Reset();
+
+  // Initialize |config| with the data in |codec_id|, |codec_private|,
+  // |is_encrypted| and the fields parsed from the last audio track element this
+  // object was used to parse.
+  // Returns true if |config| was successfully initialized.
+  // Returns false if there was unexpected values in the provided parameters or
+  // audio track element fields.
+  bool InitializeConfig(const std::string& codec_id,
+                        const std::vector<uint8>& codec_private,
+                        const int64 seek_preroll,
+                        const int64 codec_delay,
+                        bool is_encrypted,
+                        AudioDecoderConfig* config);
+
+ private:
+  // WebMParserClient implementation.
+  virtual bool OnUInt(int id, int64 val) OVERRIDE;
+  virtual bool OnFloat(int id, double val) OVERRIDE;
+
+  LogCB log_cb_;
+  int channels_;
+  double samples_per_second_;
+  double output_samples_per_second_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebMAudioClient);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_FORMATS_WEBM_WEBM_AUDIO_CLIENT_H_