limits.h

// Copyright (c) 2011 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.
 
// Contains limit definition constants for the media subsystem.
 
#ifndef PACKAGER_MEDIA_BASE_LIMITS_H_
#define PACKAGER_MEDIA_BASE_LIMITS_H_
 
namespace shaka {
namespace media {
 
namespace limits {
 
enum {
  // Maximum possible dimension (width or height) for any video.
  kMaxDimension = (1 << 15) - 1,  // 32767
 
  // Maximum possible canvas size (width multiplied by height) for any video.
  kMaxCanvas = (1 << (14 * 2)),  // 16384 x 16384
 
  // Total number of video frames which are populating in the pipeline.
  kMaxVideoFrames = 4,
 
  // The following limits are used by AudioParameters::IsValid().
  //
  // A few notes on sample rates of common formats:
  //   - AAC files are limited to 96 kHz.
  //   - MP3 files are limited to 48 kHz.
  //   - Vorbis used to be limited to 96 KHz, but no longer has that
  //     restriction.
  //   - Most PC audio hardware is limited to 192 KHz.
  kMaxSampleRate = 192000,
  kMinSampleRate = 3000,
  kMaxChannels = 32,
  kMaxBytesPerSample = 4,
  kMaxBitsPerSample = kMaxBytesPerSample * 8,
  kMaxSamplesPerPacket = kMaxSampleRate,
  kMaxPacketSizeInBytes =
      kMaxBytesPerSample * kMaxChannels * kMaxSamplesPerPacket,
 
  // This limit is used by ParamTraits<VideoCaptureParams>.
  kMaxFramesPerSecond = 1000,
};
 
}  // namespace limits
 
}  // namespace media
}  // namespace shaka
 
#endif  // PACKAGER_MEDIA_BASE_LIMITS_H_