61 int err, device_is_derived;
70 device_is_derived = 0;
89 "device context: %d.\n", err);
92 device_is_derived = 1;
109 "required to map to a hardware format.\n");
121 "frames context: %d.\n", err);
153 "target frames context: %d.\n", err);
164 "derived source frames context: %d.\n", err);
193 "hwmap: from %s (%s) to %s.\n",
208 "required to create new frames with reverse " 234 "context for reverse mapping: %d.\n", err);
240 "context (a device, or frames on input).\n");
250 outlink->
w = inlink->
w;
251 outlink->
h = inlink->
h;
253 if (device_is_derived)
258 if (device_is_derived)
277 "frame for software mapping.\n");
290 "software: %d.\n", err);
370 #define OFFSET(x) offsetof(HWMapContext, x) 371 #define FLAGS (AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM) 373 {
"mode",
"Frame mapping mode",
376 0, INT_MAX,
FLAGS,
"mode" },
378 {
"read",
"Mapping should be readable",
380 INT_MIN, INT_MAX,
FLAGS,
"mode" },
381 {
"write",
"Mapping should be writeable",
383 INT_MIN, INT_MAX,
FLAGS,
"mode" },
384 {
"overwrite",
"Mapping will always overwrite the entire frame",
386 INT_MIN, INT_MAX,
FLAGS,
"mode" },
387 {
"direct",
"Mapping should not involve any copying",
389 INT_MIN, INT_MAX,
FLAGS,
"mode" },
391 {
"derive_device",
"Derive a new device of this type",
394 {
"reverse",
"Map in reverse (create and allocate in the sink)",
396 { .i64 = 0 }, 0, 1, FLAGS },
427 .priv_class = &hwmap_class,
#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...
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
This structure describes decoded (raw) audio or video data.
static int hwmap_filter_frame(AVFilterLink *link, AVFrame *input)
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...
The mapped frame will be overwritten completely in subsequent operations, so the current frame data n...
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.
static av_cold void hwmap_uninit(AVFilterContext *avctx)
if it could not because there are no more frames
AVBufferRef * hw_frames_ctx
For hwaccel-format frames, this should be a reference to the AVHWFramesContext describing the frame...
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.
int av_hwframe_ctx_create_derived(AVBufferRef **derived_frame_ctx, enum AVPixelFormat format, AVBufferRef *derived_device_ctx, AVBufferRef *source_frame_ctx, int flags)
Create and initialise an AVHWFramesContext as a mapping of another existing AVHWFramesContext on a di...
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
static int hwmap_query_formats(AVFilterContext *avctx)
AVFILTER_DEFINE_CLASS(hwmap)
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
static const AVOption hwmap_options[]
static const AVFilterPad hwmap_inputs[]
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 the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a source
int extra_hw_frames
Sets the number of extra hardware frames which the filter will allocate on its output links for use i...
A filter pad used for either input or output.
A link between two filters.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
AVBufferRef * hwframes_ref
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.
The mapping must be readable.
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
int av_hwframe_ctx_init(AVBufferRef *ref)
Finalize the context before use.
int w
agreed upon image width
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
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.
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...
static AVFrame * hwmap_get_buffer(AVFilterLink *inlink, int w, int h)
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
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.
This struct describes a set or pool of "hardware" frames (i.e.
refcounted data buffer API
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
const VDPAUPixFmtMap * map
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
static const AVFilterPad hwmap_outputs[]
The mapping must be direct.
AVFilterLink ** outputs
array of pointers to output links
AVBufferRef * device_ref
A reference to the parent AVHWDeviceContext.
AVFrame * ff_default_get_video_buffer(AVFilterLink *link, int w, int h)
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
static int hwmap_config_output(AVFilterLink *outlink)
A reference to a data buffer.
static int query_formats(AVFilterContext *ctx)
int av_hwframe_map(AVFrame *dst, const AVFrame *src, int flags)
Map a hardware frame.
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
The mapping must be writeable.
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.
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.
char * derive_device_type
mode
Use these values in ebur128_init (or'ed).
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.