67 "to upload frames to.\n");
220 #define OFFSET(x) offsetof(HWUploadContext, x) 221 #define FLAGS (AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM) 224 "derive_device",
"Derive a new device of this type",
259 .priv_class = &hwupload_class,
260 .
inputs = hwupload_inputs,
static int hwupload_query_formats(AVFilterContext *avctx)
#define FF_FILTER_FLAG_HWFRAME_AWARE
The filter is aware of hardware frames, and any hardware frame context should not be automatically pr...
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
This structure describes decoded (raw) audio or video data.
Main libavfilter public API header.
enum AVHWDeviceType av_hwdevice_find_type_by_name(const char *name)
Look up an AVHWDeviceType by name.
int h
agreed upon image height
int width
The allocated dimensions of the frames in this pool.
AVBufferRef * hw_device_ctx
For filters which will create hardware frames, sets the device the filter should create them in...
enum AVPixelFormat format
The pixel format identifying the underlying HW surface type.
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
AVFilterFormatsConfig outcfg
Lists of supported formats / etc.
void av_hwframe_constraints_free(AVHWFramesConstraints **constraints)
Free an AVHWFrameConstraints structure.
const char * name
Pad name.
AVFilterLink ** inputs
array of pointers to input links
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce output
AVHWFramesContext * hwframes
int extra_hw_frames
Sets the number of extra hardware frames which the filter will allocate on its output links for use i...
AVFILTER_DEFINE_CLASS(hwupload)
AVBufferRef * hwframes_ref
A filter pad used for either input or output.
static int hwupload_config_output(AVFilterLink *outlink)
A link between two filters.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
void * priv
private data for use by the filter
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
AVBufferRef * hwdevice_ref
int av_hwframe_ctx_init(AVBufferRef *ref)
Finalize the context before use.
int w
agreed upon image width
int av_hwframe_transfer_data(AVFrame *dst, const AVFrame *src, int flags)
Copy data to or from a hw surface.
int initial_pool_size
Initial size of the frame pool.
AVBufferRef * hw_frames_ctx
For hwaccel pixel formats, this should be a reference to the AVHWFramesContext describing the frames...
int av_hwdevice_ctx_create_derived(AVBufferRef **dst_ref_ptr, enum AVHWDeviceType type, AVBufferRef *src_ref, int flags)
Create a new device of the specified type from an existing device.
static int hwupload_filter_frame(AVFilterLink *link, AVFrame *input)
AVFilterContext * src
source filter
static const AVFilterPad outputs[]
int format
agreed upon media format
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
This struct describes the constraints on hardware frames attached to a given device with a hardware-s...
AVHWFramesConstraints * av_hwdevice_get_hwframe_constraints(AVBufferRef *ref, const void *hwconfig)
Get the constraints on HW frames given a device and the HW-specific configuration to be used with tha...
uint8_t * data
The data buffer.
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
Describe the class of an AVClass context structure.
static const AVOption hwupload_options[]
This struct describes a set or pool of "hardware" frames (i.e.
refcounted data buffer API
enum AVPixelFormat * valid_hw_formats
A list of possible values for format in the hw_frames_ctx, terminated by AV_PIX_FMT_NONE.
const char * name
Filter name.
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some input
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a link
AVFilterLink ** outputs
array of pointers to output links
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
A reference to a data buffer.
static av_cold void hwupload_uninit(AVFilterContext *avctx)
AVBufferRef * av_hwframe_ctx_alloc(AVBufferRef *device_ref_in)
Allocate an AVHWFramesContext tied to a given device context.
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
AVFilterFormatsConfig incfg
Lists of supported formats / etc.
AVFilterContext * dst
dest filter
enum AVPixelFormat * valid_sw_formats
A list of possible values for sw_format in the hw_frames_ctx, terminated by AV_PIX_FMT_NONE.
static const AVFilterPad hwupload_outputs[]
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
static const AVFilterPad hwupload_inputs[]
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
enum AVPixelFormat sw_format
The pixel format identifying the actual data layout of the hardware frames.
AVPixelFormat
Pixel format.
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.