2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
11 #ifndef WEBRTC_MODULES_MEDIA_FILE_INTERFACE_MEDIA_FILE_H_
12 #define WEBRTC_MODULES_MEDIA_FILE_INTERFACE_MEDIA_FILE_H_
14 #include "webrtc/common_types.h"
15 #include "webrtc/modules/interface/module.h"
16 #include "webrtc/modules/interface/module_common_types.h"
17 #include "webrtc/modules/media_file/interface/media_file_defines.h"
18 #include "webrtc/typedefs.h"
21 class MediaFile : public Module
24 // Factory method. Constructor disabled. id is the identifier for the
25 // MediaFile instance.
26 static MediaFile* CreateMediaFile(const int32_t id);
27 static void DestroyMediaFile(MediaFile* module);
29 // Set the MediaFile instance identifier.
30 virtual int32_t ChangeUniqueId(const int32_t id) OVERRIDE = 0;
32 // Put 10-60ms of audio data from file into the audioBuffer depending on
33 // codec frame size. dataLengthInBytes is both an input and output
34 // parameter. As input parameter it indicates the size of audioBuffer.
35 // As output parameter it indicates the number of bytes written to
37 // Note: This API only play mono audio but can be used on file containing
38 // audio with more channels (in which case the audio will be converted to
40 virtual int32_t PlayoutAudioData(
42 uint32_t& dataLengthInBytes) = 0;
44 // Put one video frame into videoBuffer. dataLengthInBytes is both an input
45 // and output parameter. As input parameter it indicates the size of
46 // videoBuffer. As output parameter it indicates the number of bytes written
48 virtual int32_t PlayoutAVIVideoData(
50 uint32_t& dataLengthInBytes) = 0;
52 // Put 10-60ms, depending on codec frame size, of audio data from file into
53 // audioBufferLeft and audioBufferRight. The buffers contain the left and
54 // right channel of played out stereo audio.
55 // dataLengthInBytes is both an input and output parameter. As input
56 // parameter it indicates the size of both audioBufferLeft and
57 // audioBufferRight. As output parameter it indicates the number of bytes
58 // written to both audio buffers.
59 // Note: This API can only be successfully called for WAV files with stereo
61 virtual int32_t PlayoutStereoData(
62 int8_t* audioBufferLeft,
63 int8_t* audioBufferRight,
64 uint32_t& dataLengthInBytes) = 0;
66 // Open the file specified by fileName (relative path is allowed) for
67 // reading. FileCallback::PlayNotification(..) will be called after
68 // notificationTimeMs of the file has been played if notificationTimeMs is
69 // greater than zero. If loop is true the file will be played until
70 // StopPlaying() is called. When end of file is reached the file is read
71 // from the start. format specifies the type of file fileName refers to.
72 // codecInst specifies the encoding of the audio data. Note that
73 // file formats that contain this information (like WAV files) don't need to
74 // provide a non-NULL codecInst. startPointMs and stopPointMs, unless zero,
75 // specify what part of the file should be read. From startPointMs ms to
77 // Note: codecInst.channels should be set to 2 for stereo (and 1 for
78 // mono). Stereo audio is only supported for WAV files.
79 virtual int32_t StartPlayingAudioFile(
81 const uint32_t notificationTimeMs = 0,
82 const bool loop = false,
83 const FileFormats format = kFileFormatPcm16kHzFile,
84 const CodecInst* codecInst = NULL,
85 const uint32_t startPointMs = 0,
86 const uint32_t stopPointMs = 0) = 0;
88 // Open the file specified by fileName for reading (relative path is
89 // allowed). If loop is true the file will be played until StopPlaying() is
90 // called. When end of file is reached the file is read from the start.
91 // format specifies the type of file fileName refers to. Only video will be
92 // read if videoOnly is true.
93 virtual int32_t StartPlayingVideoFile(const char* fileName,
96 const FileFormats format) = 0;
98 // Prepare for playing audio from stream.
99 // FileCallback::PlayNotification(..) will be called after
100 // notificationTimeMs of the file has been played if notificationTimeMs is
101 // greater than zero. format specifies the type of file fileName refers to.
102 // codecInst specifies the encoding of the audio data. Note that
103 // file formats that contain this information (like WAV files) don't need to
104 // provide a non-NULL codecInst. startPointMs and stopPointMs, unless zero,
105 // specify what part of the file should be read. From startPointMs ms to
107 // Note: codecInst.channels should be set to 2 for stereo (and 1 for
108 // mono). Stereo audio is only supported for WAV files.
109 virtual int32_t StartPlayingAudioStream(
111 const uint32_t notificationTimeMs = 0,
112 const FileFormats format = kFileFormatPcm16kHzFile,
113 const CodecInst* codecInst = NULL,
114 const uint32_t startPointMs = 0,
115 const uint32_t stopPointMs = 0) = 0;
117 // Stop playing from file or stream.
118 virtual int32_t StopPlaying() = 0;
120 // Return true if playing.
121 virtual bool IsPlaying() = 0;
124 // Set durationMs to the number of ms that has been played from file.
125 virtual int32_t PlayoutPositionMs(
126 uint32_t& durationMs) const = 0;
128 // Write one audio frame, i.e. the bufferLength first bytes of audioBuffer,
129 // to file. The audio frame size is determined by the codecInst.pacsize
130 // parameter of the last sucessfull StartRecordingAudioFile(..) call.
131 // Note: bufferLength must be exactly one frame.
132 virtual int32_t IncomingAudioData(
133 const int8_t* audioBuffer,
134 const uint32_t bufferLength) = 0;
136 // Write one video frame, i.e. the bufferLength first bytes of videoBuffer,
138 // Note: videoBuffer can contain encoded data. The codec used must be the
139 // same as what was specified by videoCodecInst for the last successfull
140 // StartRecordingVideoFile(..) call. The videoBuffer must contain exactly
142 virtual int32_t IncomingAVIVideoData(
143 const int8_t* videoBuffer,
144 const uint32_t bufferLength) = 0;
146 // Open/creates file specified by fileName for writing (relative path is
147 // allowed). FileCallback::RecordNotification(..) will be called after
148 // notificationTimeMs of audio data has been recorded if
149 // notificationTimeMs is greater than zero.
150 // format specifies the type of file that should be created/opened.
151 // codecInst specifies the encoding of the audio data. maxSizeBytes
152 // specifies the number of bytes allowed to be written to file if it is
153 // greater than zero.
154 // Note: codecInst.channels should be set to 2 for stereo (and 1 for
155 // mono). Stereo is only supported for WAV files.
156 virtual int32_t StartRecordingAudioFile(
157 const char* fileName,
158 const FileFormats format,
159 const CodecInst& codecInst,
160 const uint32_t notificationTimeMs = 0,
161 const uint32_t maxSizeBytes = 0) = 0;
163 // Open/create the file specified by fileName for writing audio/video data
164 // (relative path is allowed). format specifies the type of file fileName
165 // should be. codecInst specifies the encoding of the audio data.
166 // videoCodecInst specifies the encoding of the video data. Only video data
167 // will be recorded if videoOnly is true.
168 virtual int32_t StartRecordingVideoFile(
169 const char* fileName,
170 const FileFormats format,
171 const CodecInst& codecInst,
172 const VideoCodec& videoCodecInst,
173 bool videoOnly = false) = 0;
175 // Prepare for recording audio to stream.
176 // FileCallback::RecordNotification(..) will be called after
177 // notificationTimeMs of audio data has been recorded if
178 // notificationTimeMs is greater than zero.
179 // format specifies the type of file that stream should correspond to.
180 // codecInst specifies the encoding of the audio data.
181 // Note: codecInst.channels should be set to 2 for stereo (and 1 for
182 // mono). Stereo is only supported for WAV files.
183 virtual int32_t StartRecordingAudioStream(
185 const FileFormats format,
186 const CodecInst& codecInst,
187 const uint32_t notificationTimeMs = 0) = 0;
189 // Stop recording to file or stream.
190 virtual int32_t StopRecording() = 0;
192 // Return true if recording.
193 virtual bool IsRecording() = 0;
195 // Set durationMs to the number of ms that has been recorded to file.
196 virtual int32_t RecordDurationMs(uint32_t& durationMs) = 0;
198 // Return true if recording or playing is stereo.
199 virtual bool IsStereo() = 0;
201 // Register callback to receive media file related notifications. Disables
202 // callbacks if callback is NULL.
203 virtual int32_t SetModuleFileCallback(FileCallback* callback) = 0;
205 // Set durationMs to the size of the file (in ms) specified by fileName.
206 // format specifies the type of file fileName refers to. freqInHz specifies
207 // the sampling frequency of the file.
208 virtual int32_t FileDurationMs(
209 const char* fileName,
210 uint32_t& durationMs,
211 const FileFormats format,
212 const uint32_t freqInHz = 16000) = 0;
214 // Update codecInst according to the current audio codec being used for
215 // reading or writing.
216 virtual int32_t codec_info(CodecInst& codecInst) const = 0;
218 // Update videoCodecInst according to the current video codec being used for
219 // reading or writing.
220 virtual int32_t VideoCodecInst(VideoCodec& videoCodecInst) const = 0;
224 virtual ~MediaFile() {}
226 } // namespace webrtc
227 #endif // WEBRTC_MODULES_MEDIA_FILE_INTERFACE_MEDIA_FILE_H_