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/*
* This file is part of bino, a 3D video player.
*
* Copyright (C) 2010, 2011, 2012
* Martin Lambers <marlam@marlam.de>
* Joe <cuchac@email.cz>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MEDIA_OBJECT_H
#define MEDIA_OBJECT_H
#include <string>
#include <vector>
#include "media_data.h"
class media_object
{
private:
bool _always_convert_to_bgra32; // Always convert video to BGRA32 format
std::string _url; // The URL of the media object (may be a file)
bool _is_device; // Whether the URL represents a device (e.g. a camera)
struct ffmpeg_stuff *_ffmpeg; // FFmpeg related data
std::vector<std::string> _tag_names; // Meta data: tag names
std::vector<std::string> _tag_values; // Meta data: tag values
// Set video frame and audio blob templates by extracting the information
// from the given streams
void set_video_frame_template(int video_stream, int width_before_avcodec_open, int height_before_avcodec_open);
void set_audio_blob_template(int audio_stream);
void set_subtitle_box_template(int subtitle_stream);
// The threaded implementation can access private members
friend class read_thread;
friend class video_decode_thread;
friend class audio_decode_thread;
friend class subtitle_decode_thread;
public:
/* Constructor, Destructor */
media_object(bool always_convert_to_bgra32 = false);
~media_object();
/*
* Initialization
*/
/* Open a media object. The URL may simply be a file name. */
void open(const std::string &url, const device_request &dev_request);
/* Get metadata */
const std::string &url() const;
size_t tags() const;
const std::string &tag_name(size_t i) const;
const std::string &tag_value(size_t i) const;
const std::string &tag_value(const std::string &tag_name) const;
/* Get the number of media streams in the file. */
int video_streams() const;
int audio_streams() const;
int subtitle_streams() const;
/* Activate a media stream for usage. Inactive streams will not be accessible. */
void video_stream_set_active(int video_stream, bool active);
void audio_stream_set_active(int audio_stream, bool active);
void subtitle_stream_set_active(int subtitle_stream, bool active);
/* Get information about video streams. */
// Return a video frame with all properties filled in (but without any data).
// Note that this is only a hint; the properties of actual video frames may differ!
const video_frame &video_frame_template(int video_stream) const;
// Return frame rate. This is just informal; usually, the presentation time of each frame
// should be used (videos do not need to have constant frame rate).
int video_frame_rate_numerator(int video_stream) const;
int video_frame_rate_denominator(int video_stream) const;
// Video stream duration in microseconds.
int64_t video_duration(int video_stream) const;
/* Get information about audio streams. */
// Return an audio blob with all properties filled in (but without any data).
// Note that this is only a hint; the properties of actual audio blobs may differ!
const audio_blob &audio_blob_template(int audio_stream) const;
// Audio stream duration in microseconds.
int64_t audio_duration(int audio_stream) const;
/* Get information about subtitle streams. */
// Return a subtitle box with all properties filled in (but without any data).
// Note that this is only a hint; the properties of actual subtitle boxes may differ!
const subtitle_box &subtitle_box_template(int subtitle_stream) const;
// Subtitle stream duration in microseconds.
int64_t subtitle_duration(int subtitle_stream) const;
/*
* Access media data
*/
/* Start to read a video frame asynchronously (in a separate thread).
* The value of 'raw_frames' must be 1 or 2. If it is 2, the two views of the frame
* are read from two consecutive raw video frames. */
void start_video_frame_read(int video_stream, int raw_frames);
/* Wait for the video frame reading to finish, and return the frame.
* An invalid frame means that EOF was reached. */
video_frame finish_video_frame_read(int video_stream);
/* Start to read the given amount of audio data asynchronously (in a separate thread). */
void start_audio_blob_read(int audio_stream, size_t size);
/* Wait for the audio data reading to finish, and return the blob.
* An invalid blob means that EOF was reached. */
audio_blob finish_audio_blob_read(int audio_stream);
/* Start to read a subtitle box asynchronously (in a separate thread). */
void start_subtitle_box_read(int subtitle_stream);
/* Wait for the subtitle box reading to finish, and return the box.
* An invalid box means that EOF was reached. */
subtitle_box finish_subtitle_box_read(int subtitle_stream);
/* Return the last position in microseconds, of the last packet that was read in any
* stream. If the position is unkown, the minimum possible value is returned. */
int64_t tell();
/* Seek to the given position in microseconds. This affects all streams.
* Make sure that the position is not out of range!
* The real position after seeking is only revealed after reading the next video frame,
* audio blob, or subtitle box. This position may differ from the requested position
* for various reasons (seeking is only possible to keyframes, seeking is not supported
* by the stream, ...) */
void seek(int64_t pos);
/*
* Cleanup
*/
/* When done, close the object and clean up. */
void close();
};
#endif
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