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41 ctx->hwctx =
ctx->device->hwctx;
53 if (!
inlink->hw_frames_ctx) {
55 "hardware frames context on the input.\n");
74 if (!
ctx->output_width)
76 if (!
ctx->output_height)
92 if (!
ctx->device_ref) {
105 if (!output_frames_ref) {
113 output_frames->
width =
ctx->output_width;
114 output_frames->
height =
ctx->output_height;
119 "frames: %d.\n", err);
124 outlink->
w =
ctx->output_width;
125 outlink->
h =
ctx->output_height;
148 cle = clReleaseProgram(
ctx->program);
149 if (cle != CL_SUCCESS)
151 "program: %d.\n", cle);
158 const char **program_source_array,
164 ctx->program = clCreateProgramWithSource(
ctx->hwctx->context, nb_strings,
165 program_source_array,
172 cle = clBuildProgram(
ctx->program, 1, &
ctx->hwctx->device_id,
174 if (cle != CL_SUCCESS) {
177 if (cle == CL_BUILD_PROGRAM_FAILURE) {
181 clGetProgramBuildInfo(
ctx->program,
ctx->hwctx->device_id,
182 CL_PROGRAM_BUILD_LOG, 0,
NULL, &log_length);
186 cle = clGetProgramBuildInfo(
ctx->program,
187 ctx->hwctx->device_id,
188 CL_PROGRAM_BUILD_LOG,
189 log_length, log,
NULL);
190 if (cle == CL_SUCCESS)
197 clReleaseProgram(
ctx->program);
206 const char *filename)
211 const char *src_const;
217 "source file \"%s\".\n", filename);
241 if (rb == 0 && ferror(file)) {
270 cl_mem_object_type
type;
280 image = (cl_mem)
frame->data[plane];
287 cle = clGetMemObjectInfo(image, CL_MEM_TYPE,
sizeof(
type),
289 if (cle != CL_SUCCESS) {
291 "plane %d: %d.\n", plane, cle);
294 if (
type != CL_MEM_OBJECT_IMAGE2D) {
300 cle = clGetImageInfo(image, CL_IMAGE_WIDTH,
sizeof(
size_t),
302 if (cle != CL_SUCCESS) {
308 cle = clGetImageInfo(image, CL_IMAGE_HEIGHT,
sizeof(
size_t),
310 if (cle != CL_SUCCESS) {
316 if (block_alignment) {
321 work_size[0] =
width;
331 av_bprintf(buf,
"__constant float %s[9] = {\n", name_str);
332 for (
i = 0;
i < 3;
i++) {
333 for (j = 0; j < 3; j++)
344 clGetEventProfilingInfo(event, CL_PROFILING_COMMAND_START,
sizeof(time_start), &time_start,
NULL);
345 clGetEventProfilingInfo(event, CL_PROFILING_COMMAND_END,
sizeof(time_end), &time_end,
NULL);
347 return time_end - time_start;
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
uint8_t * data
The data buffer.
enum AVPixelFormat format
The pixel format identifying the underlying HW surface type.
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
int av_hwframe_ctx_init(AVBufferRef *ref)
Finalize the context before use.
This structure describes decoded (raw) audio or video data.
AVBufferRef * av_hwframe_ctx_alloc(AVBufferRef *device_ref_in)
Allocate an AVHWFramesContext tied to a given device context.
AVBufferRef * hw_device_ctx
For filters which will create hardware frames, sets the device the filter should create them in.
int ff_opencl_filter_load_program(AVFilterContext *avctx, const char **program_source_array, int nb_strings)
Load a new OpenCL program from strings in memory.
AVBufferRef * av_buffer_ref(const AVBufferRef *buf)
Create a new reference to an AVBuffer.
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
int width
The allocated dimensions of the frames in this pool.
A link between two filters.
int ff_opencl_filter_work_size_from_image(AVFilterContext *avctx, size_t *work_size, AVFrame *frame, int plane, int block_alignment)
Find the work size needed needed for a given plane of an image.
void * priv
private data for use by the filter
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
int ff_opencl_filter_config_output(AVFilterLink *outlink)
Create a suitable hardware frames context for the output.
This struct aggregates all the (hardware/vendor-specific) "high-level" state, i.e.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
enum AVPixelFormat sw_format
The pixel format identifying the actual data layout of the hardware frames.
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it.
AVBufferRef * device_ref
A reference to the parent AVHWDeviceContext.
AVFilterLink ** inputs
array of pointers to input links
static int opencl_filter_set_device(AVFilterContext *avctx, AVBufferRef *device)
@ AV_PIX_FMT_OPENCL
Hardware surfaces for OpenCL.
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
AVFilterContext * src
source filter
int ff_opencl_filter_config_input(AVFilterLink *inlink)
Check that the input link contains a suitable hardware frames context and extract the device from it.
#define i(width, name, range_min, range_max)
int w
agreed upon image width
AVBufferRef * hw_frames_ctx
For hwaccel pixel formats, this should be a reference to the AVHWFramesContext describing the frames.
void ff_opencl_print_const_matrix_3x3(AVBPrint *buf, const char *name_str, double mat[3][3])
Print a 3x3 matrix into a buffer as __constant array, which could be included in an OpenCL program.
FILE * avpriv_fopen_utf8(const char *path, const char *mode)
Open a file using a UTF-8 filename.
This struct describes a set or pool of "hardware" frames (i.e.
int ff_opencl_filter_init(AVFilterContext *avctx)
Initialise an OpenCL filter context.
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 it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
void av_bprintf(AVBPrint *buf, const char *fmt,...)
int h
agreed upon image height
int ff_opencl_filter_load_program_from_file(AVFilterContext *avctx, const char *filename)
Load a new OpenCL program from a file.
void ff_opencl_filter_uninit(AVFilterContext *avctx)
Uninitialise an OpenCL filter context.
A reference to a data buffer.
cl_ulong ff_opencl_get_event_time(cl_event event)
Gets the command start and end times for the given event and returns the difference (the time that th...
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.