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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_MODULES_UTILITY_INCLUDE_FILE_PLAYER_H_
#define WEBRTC_MODULES_UTILITY_INCLUDE_FILE_PLAYER_H_
#include "webrtc/common_types.h"
#include "webrtc/engine_configurations.h"
#include "webrtc/modules/include/module_common_types.h"
#include "webrtc/typedefs.h"
#include "webrtc/video_frame.h"
namespace webrtc {
class FileCallback;
class FilePlayer
{
public:
// The largest decoded frame size in samples (60ms with 32kHz sample rate).
enum {MAX_AUDIO_BUFFER_IN_SAMPLES = 60*32};
enum {MAX_AUDIO_BUFFER_IN_BYTES = MAX_AUDIO_BUFFER_IN_SAMPLES*2};
// Note: will return NULL for unsupported formats.
static FilePlayer* CreateFilePlayer(const uint32_t instanceID,
const FileFormats fileFormat);
static void DestroyFilePlayer(FilePlayer* player);
// Read 10 ms of audio at |frequencyInHz| to |outBuffer|. |lengthInSamples|
// will be set to the number of samples read (not the number of samples per
// channel).
virtual int Get10msAudioFromFile(
int16_t* outBuffer,
size_t& lengthInSamples,
int frequencyInHz) = 0;
// Register callback for receiving file playing notifications.
virtual int32_t RegisterModuleFileCallback(
FileCallback* callback) = 0;
// API for playing audio from fileName to channel.
// Note: codecInst is used for pre-encoded files.
virtual int32_t StartPlayingFile(
const char* fileName,
bool loop,
uint32_t startPosition,
float volumeScaling,
uint32_t notification,
uint32_t stopPosition = 0,
const CodecInst* codecInst = NULL) = 0;
// Note: codecInst is used for pre-encoded files.
virtual int32_t StartPlayingFile(
InStream& sourceStream,
uint32_t startPosition,
float volumeScaling,
uint32_t notification,
uint32_t stopPosition = 0,
const CodecInst* codecInst = NULL) = 0;
virtual int32_t StopPlayingFile() = 0;
virtual bool IsPlayingFile() const = 0;
virtual int32_t GetPlayoutPosition(uint32_t& durationMs) = 0;
// Set audioCodec to the currently used audio codec.
virtual int32_t AudioCodec(CodecInst& audioCodec) const = 0;
virtual int32_t Frequency() const = 0;
// Note: scaleFactor is in the range [0.0 - 2.0]
virtual int32_t SetAudioScaling(float scaleFactor) = 0;
// Return the time in ms until next video frame should be pulled (by
// calling GetVideoFromFile(..)).
// Note: this API reads one video frame from file. This means that it should
// be called exactly once per GetVideoFromFile(..) API call.
virtual int32_t TimeUntilNextVideoFrame() { return -1;}
virtual int32_t StartPlayingVideoFile(
const char* /*fileName*/,
bool /*loop*/,
bool /*videoOnly*/) { return -1;}
virtual int32_t video_codec_info(VideoCodec& /*videoCodec*/) const
{return -1;}
virtual int32_t GetVideoFromFile(VideoFrame& /*videoFrame*/) { return -1; }
// Same as GetVideoFromFile(). videoFrame will have the resolution specified
// by the width outWidth and height outHeight in pixels.
virtual int32_t GetVideoFromFile(VideoFrame& /*videoFrame*/,
const uint32_t /*outWidth*/,
const uint32_t /*outHeight*/) {
return -1;
}
protected:
virtual ~FilePlayer() {}
};
} // namespace webrtc
#endif // WEBRTC_MODULES_UTILITY_INCLUDE_FILE_PLAYER_H_
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