1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/wave/WaveDecoder.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,38 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim:set ts=2 sw=2 sts=2 et cindent: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +#if !defined(WaveDecoder_h_)
1.10 +#define WaveDecoder_h_
1.11 +
1.12 +#include "MediaDecoder.h"
1.13 +
1.14 +/**
1.15 + * The decoder implementation is currently limited to Linear PCM encoded
1.16 + * audio data with one or two channels of 8- or 16-bit samples at sample
1.17 + * rates from 100 Hz to 96 kHz. The number of channels is limited by what
1.18 + * the audio backend (via AudioStream) currently supports. The supported
1.19 + * sample rate is artificially limited to arbitrarily selected sane values.
1.20 + * Support for additional channels (and other new features) would
1.21 + * require extending WaveDecoder to support parsing the newer
1.22 + * WAVE_FORMAT_EXTENSIBLE chunk format.
1.23 +**/
1.24 +
1.25 +namespace mozilla {
1.26 +
1.27 +class WaveDecoder : public MediaDecoder
1.28 +{
1.29 +public:
1.30 + virtual MediaDecoder* Clone() {
1.31 + if (!IsWaveEnabled()) {
1.32 + return nullptr;
1.33 + }
1.34 + return new WaveDecoder();
1.35 + }
1.36 + virtual MediaDecoderStateMachine* CreateStateMachine();
1.37 +};
1.38 +
1.39 +} // namespace mozilla
1.40 +
1.41 +#endif
