FFmpeg: libavfilter/opencl.c Source File

FFmpeg
opencl.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include <stdio.h>
20 #include <string.h>
21 
22 #include "libavutil/file_open.h"
23 #include "libavutil/mem.h"
24 #include "libavutil/pixdesc.h"
25 
26 #include "filters.h"
27 #include "opencl.h"
28 
29  static int opencl_filter_set_device(AVFilterContext *avctx,
30  AVBufferRef *device)
31 {
32  OpenCLFilterContext *ctx = avctx->priv;
33 
34  av_buffer_unref(&ctx->device_ref);
35 
36  ctx->device_ref = av_buffer_ref(device);
37  if (!ctx->device_ref)
38  return AVERROR(ENOMEM);
39 
40  ctx->device = (AVHWDeviceContext*)ctx->device_ref->data;
41  ctx->hwctx = ctx->device->hwctx;
42 
43  return 0;
44 }
45 
46  int ff_opencl_filter_config_input(AVFilterLink *inlink)
47 {
48  FilterLink *l = ff_filter_link(inlink);
49  AVFilterContext *avctx = inlink->dst;
50  OpenCLFilterContext *ctx = avctx->priv;
51  AVHWFramesContext *input_frames;
52  int err;
53 
54  if (!l->hw_frames_ctx) {
55  av_log(avctx, AV_LOG_ERROR, "OpenCL filtering requires a "
56  "hardware frames context on the input.\n");
57  return AVERROR(EINVAL);
58  }
59 
60  // Extract the device and default output format from the first input.
61  if (avctx->inputs[0] != inlink)
62  return 0;
63 
64  input_frames = (AVHWFramesContext*)l->hw_frames_ctx->data;
65  if (input_frames->format != AV_PIX_FMT_OPENCL)
66  return AVERROR(EINVAL);
67 
68  err = opencl_filter_set_device(avctx, input_frames->device_ref);
69  if (err < 0)
70  return err;
71 
72  // Default output parameters match input parameters.
73  if (ctx->output_format == AV_PIX_FMT_NONE)
74  ctx->output_format = input_frames->sw_format;
75  if (!ctx->output_width)
76  ctx->output_width = inlink->w;
77  if (!ctx->output_height)
78  ctx->output_height = inlink->h;
79 
80  return 0;
81 }
82 
83  int ff_opencl_filter_config_output(AVFilterLink *outlink)
84 {
85  FilterLink *l = ff_filter_link(outlink);
86  AVFilterContext *avctx = outlink->src;
87  OpenCLFilterContext *ctx = avctx->priv;
88  AVBufferRef *output_frames_ref = NULL;
89  AVHWFramesContext *output_frames;
90  int err;
91 
92  av_buffer_unref(&l->hw_frames_ctx);
93 
94  if (!ctx->device_ref) {
95  if (!avctx->hw_device_ctx) {
96  av_log(avctx, AV_LOG_ERROR, "OpenCL filtering requires an "
97  "OpenCL device.\n");
98  return AVERROR(EINVAL);
99  }
100 
101  err = opencl_filter_set_device(avctx, avctx->hw_device_ctx);
102  if (err < 0)
103  return err;
104  }
105 
106  output_frames_ref = av_hwframe_ctx_alloc(ctx->device_ref);
107  if (!output_frames_ref) {
108  err = AVERROR(ENOMEM);
109  goto fail;
110  }
111  output_frames = (AVHWFramesContext*)output_frames_ref->data;
112 
113  output_frames->format = AV_PIX_FMT_OPENCL;
114  output_frames->sw_format = ctx->output_format;
115  output_frames->width = ctx->output_width;
116  output_frames->height = ctx->output_height;
117 
118  err = av_hwframe_ctx_init(output_frames_ref);
119  if (err < 0) {
120  av_log(avctx, AV_LOG_ERROR, "Failed to initialise output "
121  "frames: %d.\n", err);
122  goto fail;
123  }
124 
125  l->hw_frames_ctx = output_frames_ref;
126  outlink->w = ctx->output_width;
127  outlink->h = ctx->output_height;
128 
129  return 0;
130 fail:
131  av_buffer_unref(&output_frames_ref);
132  return err;
133 }
134 
135  int ff_opencl_filter_init(AVFilterContext *avctx)
136 {
137  OpenCLFilterContext *ctx = avctx->priv;
138 
139  ctx->output_format = AV_PIX_FMT_NONE;
140 
141  return 0;
142 }
143 
144  void ff_opencl_filter_uninit(AVFilterContext *avctx)
145 {
146  OpenCLFilterContext *ctx = avctx->priv;
147  cl_int cle;
148 
149  if (ctx->program) {
150  cle = clReleaseProgram(ctx->program);
151  if (cle != CL_SUCCESS)
152  av_log(avctx, AV_LOG_ERROR, "Failed to release "
153  "program: %d.\n", cle);
154  }
155 
156  av_buffer_unref(&ctx->device_ref);
157 }
158 
159  int ff_opencl_filter_load_program(AVFilterContext *avctx,
160  const char **program_source_array,
161  int nb_strings)
162 {
163  OpenCLFilterContext *ctx = avctx->priv;
164  cl_int cle;
165 
166  ctx->program = clCreateProgramWithSource(ctx->hwctx->context, nb_strings,
167  program_source_array,
168  NULL, &cle);
169  if (!ctx->program) {
170  av_log(avctx, AV_LOG_ERROR, "Failed to create program: %d.\n", cle);
171  return AVERROR(EIO);
172  }
173 
174  cle = clBuildProgram(ctx->program, 1, &ctx->hwctx->device_id,
175  NULL, NULL, NULL);
176  if (cle != CL_SUCCESS) {
177  av_log(avctx, AV_LOG_ERROR, "Failed to build program: %d.\n", cle);
178 
179  if (cle == CL_BUILD_PROGRAM_FAILURE) {
180  char *log;
181  size_t log_length;
182 
183  clGetProgramBuildInfo(ctx->program, ctx->hwctx->device_id,
184  CL_PROGRAM_BUILD_LOG, 0, NULL, &log_length);
185 
186  log = av_malloc(log_length);
187  if (log) {
188  cle = clGetProgramBuildInfo(ctx->program,
189  ctx->hwctx->device_id,
190  CL_PROGRAM_BUILD_LOG,
191  log_length, log, NULL);
192  if (cle == CL_SUCCESS)
193  av_log(avctx, AV_LOG_ERROR, "Build log:\n%s\n", log);
194  }
195 
196  av_free(log);
197  }
198 
199  clReleaseProgram(ctx->program);
200  ctx->program = NULL;
201  return AVERROR(EIO);
202  }
203 
204  return 0;
205 }
206 
207  int ff_opencl_filter_load_program_from_file(AVFilterContext *avctx,
208  const char *filename)
209 {
210  FILE *file;
211  char *src = NULL;
212  size_t pos, len, rb;
213  const char *src_const;
214  int err;
215 
216  file = avpriv_fopen_utf8(filename, "r");
217  if (!file) {
218  av_log(avctx, AV_LOG_ERROR, "Unable to open program "
219  "source file \"%s\".\n", filename);
220  return AVERROR(ENOENT);
221  }
222 
223  len = 1 << 16;
224  pos = 0;
225 
226  err = av_reallocp(&src, len);
227  if (err < 0)
228  goto fail;
229 
230  err = snprintf(src, len, "#line 1 \"%s\"\n", filename);
231  if (err < 0) {
232  err = AVERROR(errno);
233  goto fail;
234  }
235  if (err > len / 2) {
236  err = AVERROR(EINVAL);
237  goto fail;
238  }
239  pos = err;
240 
241  while (1) {
242  rb = fread(src + pos, 1, len - pos - 1, file);
243  if (rb == 0 && ferror(file)) {
244  err = AVERROR(EIO);
245  goto fail;
246  }
247  pos += rb;
248  if (pos + 1 < len)
249  break;
250  len <<= 1;
251  err = av_reallocp(&src, len);
252  if (err < 0)
253  goto fail;
254  }
255  src[pos] = 0;
256 
257  src_const = src;
258 
259  err = ff_opencl_filter_load_program(avctx, &src_const, 1);
260 fail:
261  fclose(file);
262  av_freep(&src);
263  return err;
264 }
265 
266  int ff_opencl_filter_work_size_from_image(AVFilterContext *avctx,
267  size_t *work_size,
268  AVFrame *frame, int plane,
269  int block_alignment)
270 {
271  cl_mem image;
272  cl_mem_object_type type;
273  size_t width, height;
274  cl_int cle;
275 
276  if (frame->format != AV_PIX_FMT_OPENCL) {
277  av_log(avctx, AV_LOG_ERROR, "Invalid frame format %s, "
278  "opencl required.\n", av_get_pix_fmt_name(frame->format));
279  return AVERROR(EINVAL);
280  }
281 
282  image = (cl_mem)frame->data[plane];
283  if (!image) {
284  av_log(avctx, AV_LOG_ERROR, "Plane %d required but not set.\n",
285  plane);
286  return AVERROR(EINVAL);
287  }
288 
289  cle = clGetMemObjectInfo(image, CL_MEM_TYPE, sizeof(type),
290  &type, NULL);
291  if (cle != CL_SUCCESS) {
292  av_log(avctx, AV_LOG_ERROR, "Failed to query object type of "
293  "plane %d: %d.\n", plane, cle);
294  return AVERROR_UNKNOWN;
295  }
296  if (type != CL_MEM_OBJECT_IMAGE2D) {
297  av_log(avctx, AV_LOG_ERROR, "Plane %d is not a 2D image.\n",
298  plane);
299  return AVERROR(EINVAL);
300  }
301 
302  cle = clGetImageInfo(image, CL_IMAGE_WIDTH, sizeof(size_t),
303  &width, NULL);
304  if (cle != CL_SUCCESS) {
305  av_log(avctx, AV_LOG_ERROR, "Failed to query plane %d width: %d.\n",
306  plane, cle);
307  return AVERROR_UNKNOWN;
308  }
309 
310  cle = clGetImageInfo(image, CL_IMAGE_HEIGHT, sizeof(size_t),
311  &height, NULL);
312  if (cle != CL_SUCCESS) {
313  av_log(avctx, AV_LOG_ERROR, "Failed to query plane %d height: %d.\n",
314  plane, cle);
315  return AVERROR_UNKNOWN;
316  }
317 
318  if (block_alignment) {
319  width = FFALIGN(width, block_alignment);
320  height = FFALIGN(height, block_alignment);
321  }
322 
323  work_size[0] = width;
324  work_size[1] = height;
325 
326  return 0;
327 }
328 
329  void ff_opencl_print_const_matrix_3x3(AVBPrint *buf, const char *name_str,
330  double mat[3][3])
331 {
332  int i, j;
333  av_bprintf(buf, "__constant float %s[9] = {\n", name_str);
334  for (i = 0; i < 3; i++) {
335  for (j = 0; j < 3; j++)
336  av_bprintf(buf, " %.5ff,", mat[i][j]);
337  av_bprintf(buf, "\n");
338  }
339  av_bprintf(buf, "};\n");
340 }
341 
342  cl_ulong ff_opencl_get_event_time(cl_event event) {
343  cl_ulong time_start;
344  cl_ulong time_end;
345 
346  clGetEventProfilingInfo(event, CL_PROFILING_COMMAND_START, sizeof(time_start), &time_start, NULL);
347  clGetEventProfilingInfo(event, CL_PROFILING_COMMAND_END, sizeof(time_end), &time_end, NULL);
348 
349  return time_end - time_start;
350 }
AVERROR
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
AVBufferRef::data
uint8_t * data
The data buffer.
Definition: buffer.h:90
AVHWFramesContext::format
enum AVPixelFormat format
The pixel format identifying the underlying HW surface type.
Definition: hwcontext.h:200
inlink
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
Definition: filter_design.txt:212
normalize.log
log
Definition: normalize.py:21
av_hwframe_ctx_init
int av_hwframe_ctx_init(AVBufferRef *ref)
Finalize the context before use.
Definition: hwcontext.c:337
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:427
pixdesc.h
av_hwframe_ctx_alloc
AVBufferRef * av_hwframe_ctx_alloc(AVBufferRef *device_ref_in)
Allocate an AVHWFramesContext tied to a given device context.
Definition: hwcontext.c:263
opencl.h
AVFilterContext::hw_device_ctx
AVBufferRef * hw_device_ctx
For filters which will create hardware frames, sets the device the filter should create them in.
Definition: avfilter.h:356
ff_opencl_filter_load_program
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.
Definition: opencl.c:159
av_buffer_ref
AVBufferRef * av_buffer_ref(const AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:103
AVERROR_UNKNOWN
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:73
AVHWFramesContext::width
int width
The allocated dimensions of the frames in this pool.
Definition: hwcontext.h:220
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
ff_opencl_filter_work_size_from_image
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.
Definition: opencl.c:266
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:289
fail
#define fail()
Definition: checkasm.h:207
type
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
Definition: writing_filters.txt:86
ff_opencl_filter_config_output
int ff_opencl_filter_config_output(AVFilterLink *outlink)
Create a suitable hardware frames context for the output.
Definition: opencl.c:83
AVHWDeviceContext
This struct aggregates all the (hardware/vendor-specific) "high-level" state, i.e.
Definition: hwcontext.h:63
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:210
AVHWFramesContext::height
int height
Definition: hwcontext.h:220
filters.h
ctx
AVFormatContext * ctx
Definition: movenc.c:49
file_open.h
if
if(ret)
Definition: filter_design.txt:179
NULL
#define NULL
Definition: coverity.c:32
AVHWFramesContext::sw_format
enum AVPixelFormat sw_format
The pixel format identifying the actual data layout of the hardware frames.
Definition: hwcontext.h:213
av_buffer_unref
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it.
Definition: buffer.c:139
AVHWFramesContext::device_ref
AVBufferRef * device_ref
A reference to the parent AVHWDeviceContext.
Definition: hwcontext.h:129
AVFilterContext::inputs
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:282
opencl_filter_set_device
static int opencl_filter_set_device(AVFilterContext *avctx, AVBufferRef *device)
Definition: opencl.c:29
AV_PIX_FMT_OPENCL
@ AV_PIX_FMT_OPENCL
Hardware surfaces for OpenCL.
Definition: pixfmt.h:358
ff_filter_link
static FilterLink * ff_filter_link(AVFilterLink *link)
Definition: filters.h:198
height
#define height
Definition: dsp.h:89
av_reallocp
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
Definition: mem.c:188
ff_opencl_filter_config_input
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.
Definition: opencl.c:46
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
ff_opencl_print_const_matrix_3x3
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.
Definition: opencl.c:329
len
int len
Definition: vorbis_enc_data.h:426
avpriv_fopen_utf8
FILE * avpriv_fopen_utf8(const char *path, const char *mode)
Open a file using a UTF-8 filename.
Definition: file_open.c:161
AVHWFramesContext
This struct describes a set or pool of "hardware" frames (i.e.
Definition: hwcontext.h:118
ff_opencl_filter_init
int ff_opencl_filter_init(AVFilterContext *avctx)
Initialise an OpenCL filter context.
Definition: opencl.c:135
frame
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
Definition: filter_design.txt:265
pos
unsigned int pos
Definition: spdifenc.c:414
av_bprintf
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:122
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:72
ff_opencl_filter_load_program_from_file
int ff_opencl_filter_load_program_from_file(AVFilterContext *avctx, const char *filename)
Load a new OpenCL program from a file.
Definition: opencl.c:207
OpenCLFilterContext
Definition: opencl.h:36
ff_opencl_filter_uninit
void ff_opencl_filter_uninit(AVFilterContext *avctx)
Uninitialise an OpenCL filter context.
Definition: opencl.c:144
AVFilterContext
An instance of a filter.
Definition: avfilter.h:274
mem.h
AVBufferRef
A reference to a data buffer.
Definition: buffer.h:82
ff_opencl_get_event_time
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...
Definition: opencl.c:342
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:78
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
width
#define width
Definition: dsp.h:89
snprintf
#define snprintf
Definition: snprintf.h:34
src
#define src
Definition: vp8dsp.c:248
av_get_pix_fmt_name
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.
Definition: pixdesc.c:3376
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