1 files changed, 74 insertions, 0 deletions
diff --git a/dom/media/gmp/gmp-api/gmp-audio-samples.h b/dom/media/gmp/gmp-api/gmp-audio-samples.h
new file mode 100644
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+++ b/dom/media/gmp/gmp-api/gmp-audio-samples.h
@@ -0,0 +1,74 @@
+/*
+* Copyright 2013, Mozilla Foundation and contributors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#ifndef GMP_AUDIO_FRAME_h_
+#define GMP_AUDIO_FRAME_h_
+
+#include <stdint.h>
+#include "gmp-errors.h"
+#include "gmp-decryption.h"
+
+enum GMPAudioFormat
+{
+  kGMPAudioEncodedSamples, // Raw compressed data, i.e. an AAC/Vorbis packet.
+  kGMPAudioIS16Samples, // Interleaved int16_t PCM samples.
+  kGMPAudioSamplesFormatInvalid // Should always be last.
+};
+
+class GMPAudioSamples {
+public:
+  // The format of the buffer.
+  virtual GMPAudioFormat GetFormat() = 0;
+  virtual void Destroy() = 0;
+
+  // MAIN THREAD ONLY
+  // Buffer size must be exactly what's required to contain all samples in
+  // the buffer; every byte is assumed to be part of a sample.
+  virtual GMPErr SetBufferSize(uint32_t aSize) = 0;
+
+  // Size of the buffer in bytes.
+  virtual uint32_t Size() = 0;
+
+  // Timestamps are in microseconds, and are the playback start time of the
+  // first sample in the buffer.
+  virtual void SetTimeStamp(uint64_t aTimeStamp) = 0;
+  virtual uint64_t TimeStamp() = 0;
+  virtual const uint8_t* Buffer() const = 0;
+  virtual uint8_t*       Buffer() = 0;
+
+  // Get metadata describing how this frame is encrypted, or nullptr if the
+  // buffer is not encrypted.
+  virtual const GMPEncryptedBufferMetadata* GetDecryptionData() const = 0;
+
+  virtual uint32_t Channels() const = 0;
+  virtual void SetChannels(uint32_t aChannels) = 0;
+
+  // Rate; the number of frames per second, where a "frame" is one sample for
+  // each channel.
+  //
+  // For IS16 samples, the number of samples should be:
+  //   Size() / (Channels() * sizeof(int16_t)).
+  //
+  // Note: Channels() and Rate() may not be constant across a decoding
+  // session. For example the rate for decoded samples may be different
+  // than the rate advertised by the MP4 container for encoded samples
+  // for HE-AAC streams with SBR/PS, and an EME-GMP may need to downsample
+  // to satisfy DRM requirements.
+  virtual uint32_t Rate() const = 0;
+  virtual void SetRate(uint32_t aRate) = 0;
+};
+
+#endif // GMP_AUDIO_FRAME_h_