/* * Copyright 2014 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef ANDROID_TV_INPUT_INTERFACE_H #define ANDROID_TV_INPUT_INTERFACE_H #include #include #include #include #include #include __BEGIN_DECLS /* * Module versioning information for the TV input hardware module, based on * tv_input_module_t.common.module_api_version. * * Version History: * * TV_INPUT_MODULE_API_VERSION_0_1: * Initial TV input hardware module API. * */ #define TV_INPUT_MODULE_API_VERSION_0_1 HARDWARE_MODULE_API_VERSION(0, 1) #define TV_INPUT_DEVICE_API_VERSION_0_1 HARDWARE_DEVICE_API_VERSION(0, 1) /* * The id of this module */ #define TV_INPUT_HARDWARE_MODULE_ID "tv_input" #define TV_INPUT_DEFAULT_DEVICE "default" /*****************************************************************************/ /* * Every hardware module must have a data structure named HAL_MODULE_INFO_SYM * and the fields of this data structure must begin with hw_module_t * followed by module specific information. */ typedef struct tv_input_module { struct hw_module_t common; } tv_input_module_t; /*****************************************************************************/ enum { /* Generic hardware. */ TV_INPUT_TYPE_OTHER_HARDWARE = 1, /* Tuner. (e.g. built-in terrestrial tuner) */ TV_INPUT_TYPE_TUNER = 2, TV_INPUT_TYPE_COMPOSITE = 3, TV_INPUT_TYPE_SVIDEO = 4, TV_INPUT_TYPE_SCART = 5, TV_INPUT_TYPE_COMPONENT = 6, TV_INPUT_TYPE_VGA = 7, TV_INPUT_TYPE_DVI = 8, /* Physical HDMI port. (e.g. HDMI 1) */ TV_INPUT_TYPE_HDMI = 9, TV_INPUT_TYPE_DISPLAY_PORT = 10, }; typedef uint32_t tv_input_type_t; typedef struct tv_input_device_info { /* Device ID */ int device_id; /* Type of physical TV input. */ tv_input_type_t type; union { struct { /* HDMI port ID number */ uint32_t port_id; } hdmi; /* TODO: add other type specific information. */ int32_t type_info_reserved[16]; }; /* TODO: Add capability if necessary. */ /* * Audio info * * audio_type == AUDIO_DEVICE_NONE if this input has no audio. */ audio_devices_t audio_type; const char* audio_address; int32_t reserved[16]; } tv_input_device_info_t; /* See tv_input_event_t for more details. */ enum { /* * Hardware notifies the framework that a device is available. * * Note that DEVICE_AVAILABLE and DEVICE_UNAVAILABLE events do not represent * hotplug events (i.e. plugging cable into or out of the physical port). * These events notify the framework whether the port is available or not. * For a concrete example, when a user plugs in or pulls out the HDMI cable * from a HDMI port, it does not generate DEVICE_AVAILABLE and/or * DEVICE_UNAVAILABLE events. However, if a user inserts a pluggable USB * tuner into the Android device, it will generate a DEVICE_AVAILABLE event * and when the port is removed, it should generate a DEVICE_UNAVAILABLE * event. * * For hotplug events, please see STREAM_CONFIGURATION_CHANGED for more * details. * * HAL implementation should register devices by using this event when the * device boots up. The framework will recognize device reported via this * event only. In addition, the implementation could use this event to * notify the framework that a removable TV input device (such as USB tuner * as stated in the example above) is attached. */ TV_INPUT_EVENT_DEVICE_AVAILABLE = 1, /* * Hardware notifies the framework that a device is unavailable. * * HAL implementation should generate this event when a device registered * by TV_INPUT_EVENT_DEVICE_AVAILABLE is no longer available. For example, * the event can indicate that a USB tuner is plugged out from the Android * device. * * Note that this event is not for indicating cable plugged out of the port; * for that purpose, the implementation should use * STREAM_CONFIGURATION_CHANGED event. This event represents the port itself * being no longer available. */ TV_INPUT_EVENT_DEVICE_UNAVAILABLE = 2, /* * Stream configurations are changed. Client should regard all open streams * at the specific device are closed, and should call * get_stream_configurations() again, opening some of them if necessary. * * HAL implementation should generate this event when the available stream * configurations change for any reason. A typical use case of this event * would be to notify the framework that the input signal has changed * resolution, or that the cable is plugged out so that the number of * available streams is 0. * * The implementation may use this event to indicate hotplug status of the * port. the framework regards input devices with no available streams as * disconnected, so the implementation can generate this event with no * available streams to indicate that this device is disconnected, and vice * versa. */ TV_INPUT_EVENT_STREAM_CONFIGURATIONS_CHANGED = 3, /* * Hardware is done with capture request with the buffer. Client can assume * ownership of the buffer again. * * HAL implementation should generate this event after request_capture() if * it succeeded. The event shall have the buffer with the captured image. */ TV_INPUT_EVENT_CAPTURE_SUCCEEDED = 4, /* * Hardware met a failure while processing a capture request or client * canceled the request. Client can assume ownership of the buffer again. * * The event is similar to TV_INPUT_EVENT_CAPTURE_SUCCEEDED, but HAL * implementation generates this event upon a failure to process * request_capture(), or a request cancellation. */ TV_INPUT_EVENT_CAPTURE_FAILED = 5, }; typedef uint32_t tv_input_event_type_t; typedef struct tv_input_capture_result { /* Device ID */ int device_id; /* Stream ID */ int stream_id; /* Sequence number of the request */ uint32_t seq; /* * The buffer passed to hardware in request_capture(). The content of * buffer is undefined (although buffer itself is valid) for * TV_INPUT_CAPTURE_FAILED event. */ buffer_handle_t buffer; /* * Error code for the request. -ECANCELED if request is cancelled; other * error codes are unknown errors. */ int error_code; } tv_input_capture_result_t; typedef struct tv_input_event { tv_input_event_type_t type; union { /* * TV_INPUT_EVENT_DEVICE_AVAILABLE: all fields are relevant * TV_INPUT_EVENT_DEVICE_UNAVAILABLE: only device_id is relevant * TV_INPUT_EVENT_STREAM_CONFIGURATIONS_CHANGED: only device_id is * relevant */ tv_input_device_info_t device_info; /* * TV_INPUT_EVENT_CAPTURE_SUCCEEDED: error_code is not relevant * TV_INPUT_EVENT_CAPTURE_FAILED: all fields are relevant */ tv_input_capture_result_t capture_result; }; } tv_input_event_t; typedef struct tv_input_callback_ops { /* * event contains the type of the event and additional data if necessary. * The event object is guaranteed to be valid only for the duration of the * call. * * data is an object supplied at device initialization, opaque to the * hardware.     */ void (*notify)(struct tv_input_device* dev, tv_input_event_t* event, void* data); } tv_input_callback_ops_t; enum { TV_STREAM_TYPE_INDEPENDENT_VIDEO_SOURCE = 1, TV_STREAM_TYPE_BUFFER_PRODUCER = 2, }; typedef uint32_t tv_stream_type_t; typedef struct tv_stream_config { /* * ID number of the stream. This value is used to identify the whole stream * configuration. */ int stream_id; /* Type of the stream */ tv_stream_type_t type; /* Max width/height of the stream. */ uint32_t max_video_width; uint32_t max_video_height; } tv_stream_config_t; typedef struct buffer_producer_stream { /* * IN/OUT: Width / height of the stream. Client may request for specific * size but hardware may change it. Client must allocate buffers with * specified width and height. */ uint32_t width; uint32_t height; /* OUT: Client must set this usage when allocating buffer. */ uint32_t usage; /* OUT: Client must allocate a buffer with this format. */ uint32_t format; /* OUT: Client must allocate buffers based on this count. */ uint32_t buffer_count; } buffer_producer_stream_t; typedef struct tv_stream { /* IN: ID in the stream configuration */ int stream_id; /* OUT: Type of the stream (for convenience) */ tv_stream_type_t type; /* Data associated with the stream for client's use */ union { /* OUT: A native handle describing the sideband stream source */ native_handle_t* sideband_stream_source_handle; /* IN/OUT: Details are in buffer_producer_stream_t */ buffer_producer_stream_t buffer_producer; }; } tv_stream_t; /* * Every device data structure must begin with hw_device_t * followed by module specific public methods and attributes. */ typedef struct tv_input_device { struct hw_device_t common; /* * initialize: * * Provide callbacks to the device and start operation. At first, no device * is available and after initialize() completes, currently available * devices including static devices should notify via callback. * * Framework owns callbacks object. * * data is a framework-owned object which would be sent back to the * framework for each callback notifications. * * Return 0 on success. */ int (*initialize)(struct tv_input_device* dev, const tv_input_callback_ops_t* callback, void* data); /* * get_stream_configurations: * * Get stream configurations for a specific device. An input device may have * multiple configurations. * * The configs object is guaranteed to be valid only until the next call to * get_stream_configurations() or STREAM_CONFIGURATIONS_CHANGED event. * * Return 0 on success. */ int (*get_stream_configurations)(const struct tv_input_device* dev, int device_id, int* num_configurations, const tv_stream_config_t** configs); /* * open_stream: * * Open a stream with given stream ID. Caller owns stream object, and the * populated data is only valid until the stream is closed. * * Return 0 on success; -EBUSY if the client should close other streams to * open the stream; -EEXIST if the stream with the given ID is already open; * -EINVAL if device_id and/or stream_id are invalid; other non-zero value * denotes unknown error. */ int (*open_stream)(struct tv_input_device* dev, int device_id, tv_stream_t* stream); /* * close_stream: * * Close a stream to a device. data in tv_stream_t* object associated with * the stream_id is obsolete once this call finishes. * * Return 0 on success; -ENOENT if the stream is not open; -EINVAL if * device_id and/or stream_id are invalid. */ int (*close_stream)(struct tv_input_device* dev, int device_id, int stream_id); /* * request_capture: * * Request buffer capture for a stream. This is only valid for buffer * producer streams. The buffer should be created with size, format and * usage specified in the stream. Framework provides seq in an * increasing sequence per each stream. Hardware should provide the picture * in a chronological order according to seq. For example, if two * requests are being processed at the same time, the request with the * smaller seq should get an earlier frame. * * The framework releases the ownership of the buffer upon calling this * function. When the buffer is filled, hardware notifies the framework * via TV_INPUT_EVENT_CAPTURE_FINISHED callback, and the ownership is * transferred back to framework at that time. * * Return 0 on success; -ENOENT if the stream is not open; -EINVAL if * device_id and/or stream_id are invalid; -EWOULDBLOCK if HAL cannot take * additional requests until it releases a buffer. */ int (*request_capture)(struct tv_input_device* dev, int device_id, int stream_id, buffer_handle_t buffer, uint32_t seq); /* * cancel_capture: * * Cancel an ongoing capture. Hardware should release the buffer as soon as * possible via TV_INPUT_EVENT_CAPTURE_FAILED callback. * * Return 0 on success; -ENOENT if the stream is not open; -EINVAL if * device_id, stream_id, and/or seq are invalid. */ int (*cancel_capture)(struct tv_input_device* dev, int device_id, int stream_id, uint32_t seq); void* reserved[16]; } tv_input_device_t; __END_DECLS #endif // ANDROID_TV_INPUT_INTERFACE_H