doubango-android/tinyMEDIA/include/tinymedia/tmedia_consumer.h

/*
* Copyright (C) 2010-2011 Mamadou Diop.
*
* Contact: Mamadou Diop <diopmamadou(at)doubango[dot]org>
*
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO 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.
*
* DOUBANGO 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 DOUBANGO.
*
*/

/**@file tmedia_consumer.h
 * @brief Base consumer object.
 *
 * @author Mamadou Diop <diopmamadou(at)doubango[dot]org>
 *
 */
#ifndef TINYMEDIA_CONSUMER_H
#define TINYMEDIA_CONSUMER_H

#include "tinymedia_config.h"

#include "tinymedia/tmedia_codec.h"
#include "tinymedia/tmedia_params.h"
#include "tmedia_common.h"

TMEDIA_BEGIN_DECLS

#define TMEDIA_CONSUMER_BITS_PER_SAMPLE_DEFAULT		16
#define TMEDIA_CONSUMER_CHANNELS_DEFAULT			2
#define TMEDIA_CONSUMER_RATE_DEFAULT				8000


/**Max number of plugins (consumer types) we can create */
#if !defined(TMED_CONSUMER_MAX_PLUGINS)
#	define TMED_CONSUMER_MAX_PLUGINS			0x0F
#endif

/** cast any pointer to @ref tmedia_consumer_t* object */
#define TMEDIA_CONSUMER(self)		((tmedia_consumer_t*)(self))

/**  Default Video chroma */
#if !defined(TMEDIA_CONSUMER_CHROMA_DEFAULT)
#	define TMEDIA_CONSUMER_CHROMA_DEFAULT tmedia_chroma_yuv420p
#endif

/** Base object for all Consumers */
typedef struct tmedia_consumer_s {
    TSK_DECLARE_OBJECT;

    tmedia_type_t type;
    const char* desc;

    struct {
        int fps;
        struct {
            tmedia_chroma_t chroma;
            tsk_size_t width;
            tsk_size_t height;
        } in;
        struct {
            tmedia_chroma_t chroma;
            tsk_size_t width;
            tsk_size_t height;
            tsk_bool_t auto_resize; // auto_resize to "in.width, in.height"
        } display;
    } video;

    struct {
        uint8_t bits_per_sample;
        uint8_t ptime;
        uint8_t gain;
        struct {
            uint8_t channels;
            uint32_t rate;
        } in;
        struct {
            uint8_t channels;
            uint32_t rate;
        } out;
        int32_t volume;
    } audio;

    tsk_bool_t is_started;
    tsk_bool_t is_prepared;
    uint64_t session_id;

    struct {
        enum tmedia_codec_id_e codec_id;
        // other options to be added
    } decoder;

    const struct tmedia_consumer_plugin_def_s* plugin;
}
tmedia_consumer_t;

/** Virtual table used to define a consumer plugin */
typedef struct tmedia_consumer_plugin_def_s {
    //! object definition used to create an instance of the consumer
    const tsk_object_def_t* objdef;

    //! the type of the consumer
    tmedia_type_t type;
    //! full description (usefull for debugging)
    const char* desc;

    int (*set) (tmedia_consumer_t* , const tmedia_param_t*);
    int (* prepare) (tmedia_consumer_t*, const tmedia_codec_t* );
    int (* start) (tmedia_consumer_t* );
    int (* consume) (tmedia_consumer_t*, const void* buffer, tsk_size_t size, const tsk_object_t* proto_hdr);
    int (* pause) (tmedia_consumer_t* );
    int (* stop) (tmedia_consumer_t* );
}
tmedia_consumer_plugin_def_t;

#define TMEDIA_DECLARE_CONSUMER tmedia_consumer_t __consumer__

TINYMEDIA_API tmedia_consumer_t* tmedia_consumer_create(tmedia_type_t type, uint64_t session_id);
TINYMEDIA_API int tmedia_consumer_init(tmedia_consumer_t* self);
TINYMEDIA_API int tmedia_consumer_set(tmedia_consumer_t *self, const tmedia_param_t* param);
TINYMEDIA_API int tmedia_consumer_prepare(tmedia_consumer_t *self, const tmedia_codec_t* codec);
TINYMEDIA_API int tmedia_consumer_start(tmedia_consumer_t *self);
TINYMEDIA_API int tmedia_consumer_consume(tmedia_consumer_t* self, const void* buffer, tsk_size_t size, const tsk_object_t* proto_hdr);
TINYMEDIA_API int tmedia_consumer_pause(tmedia_consumer_t *self);
TINYMEDIA_API int tmedia_consumer_stop(tmedia_consumer_t *self);
TINYMEDIA_API int tmedia_consumer_deinit(tmedia_consumer_t* self);

TINYMEDIA_API int tmedia_consumer_plugin_register(const tmedia_consumer_plugin_def_t* plugin);
TINYMEDIA_API int tmedia_consumer_plugin_unregister(const tmedia_consumer_plugin_def_t* plugin);
TINYMEDIA_API int tmedia_consumer_plugin_unregister_by_type(tmedia_type_t type);

TMEDIA_END_DECLS

#endif /* TINYMEDIA_CONSUMER_H */