Line |
Branch |
Exec |
Source |
1 |
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/* |
2 |
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* V4L mem2mem |
3 |
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* |
4 |
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* Copyright (C) 2017 Alexis Ballier <aballier@gentoo.org> |
5 |
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* Copyright (C) 2017 Jorge Ramirez <jorge.ramirez-ortiz@linaro.org> |
6 |
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* |
7 |
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* This file is part of FFmpeg. |
8 |
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* |
9 |
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* FFmpeg is free software; you can redistribute it and/or |
10 |
|
|
* modify it under the terms of the GNU Lesser General Public |
11 |
|
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* License as published by the Free Software Foundation; either |
12 |
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* version 2.1 of the License, or (at your option) any later version. |
13 |
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* |
14 |
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* FFmpeg is distributed in the hope that it will be useful, |
15 |
|
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 |
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
17 |
|
|
* Lesser General Public License for more details. |
18 |
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* |
19 |
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* You should have received a copy of the GNU Lesser General Public |
20 |
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* License along with FFmpeg; if not, write to the Free Software |
21 |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
22 |
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*/ |
23 |
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24 |
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#include <linux/videodev2.h> |
25 |
|
|
#include <sys/ioctl.h> |
26 |
|
|
#include <sys/mman.h> |
27 |
|
|
#include <unistd.h> |
28 |
|
|
#include <dirent.h> |
29 |
|
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#include <fcntl.h> |
30 |
|
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#include "libavcodec/avcodec.h" |
31 |
|
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#include "libavutil/pixdesc.h" |
32 |
|
|
#include "libavutil/imgutils.h" |
33 |
|
|
#include "libavutil/pixfmt.h" |
34 |
|
|
#include "v4l2_context.h" |
35 |
|
|
#include "v4l2_fmt.h" |
36 |
|
|
#include "v4l2_m2m.h" |
37 |
|
|
|
38 |
|
✗ |
static inline int v4l2_splane_video(struct v4l2_capability *cap) |
39 |
|
|
{ |
40 |
|
✗ |
if (cap->capabilities & (V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT) && |
41 |
|
✗ |
cap->capabilities & V4L2_CAP_STREAMING) |
42 |
|
✗ |
return 1; |
43 |
|
|
|
44 |
|
✗ |
if (cap->capabilities & V4L2_CAP_VIDEO_M2M) |
45 |
|
✗ |
return 1; |
46 |
|
|
|
47 |
|
✗ |
return 0; |
48 |
|
|
} |
49 |
|
|
|
50 |
|
✗ |
static inline int v4l2_mplane_video(struct v4l2_capability *cap) |
51 |
|
|
{ |
52 |
|
✗ |
if (cap->capabilities & (V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE) && |
53 |
|
✗ |
cap->capabilities & V4L2_CAP_STREAMING) |
54 |
|
✗ |
return 1; |
55 |
|
|
|
56 |
|
✗ |
if (cap->capabilities & V4L2_CAP_VIDEO_M2M_MPLANE) |
57 |
|
✗ |
return 1; |
58 |
|
|
|
59 |
|
✗ |
return 0; |
60 |
|
|
} |
61 |
|
|
|
62 |
|
✗ |
static int v4l2_prepare_contexts(V4L2m2mContext *s, int probe) |
63 |
|
|
{ |
64 |
|
|
struct v4l2_capability cap; |
65 |
|
✗ |
void *log_ctx = s->avctx; |
66 |
|
|
int ret; |
67 |
|
|
|
68 |
|
✗ |
s->capture.done = s->output.done = 0; |
69 |
|
✗ |
s->capture.name = "capture"; |
70 |
|
✗ |
s->output.name = "output"; |
71 |
|
✗ |
atomic_init(&s->refcount, 0); |
72 |
|
✗ |
sem_init(&s->refsync, 0, 0); |
73 |
|
|
|
74 |
|
✗ |
memset(&cap, 0, sizeof(cap)); |
75 |
|
✗ |
ret = ioctl(s->fd, VIDIOC_QUERYCAP, &cap); |
76 |
|
✗ |
if (ret < 0) |
77 |
|
✗ |
return ret; |
78 |
|
|
|
79 |
|
✗ |
av_log(log_ctx, probe ? AV_LOG_DEBUG : AV_LOG_INFO, |
80 |
|
|
"driver '%s' on card '%s' in %s mode\n", cap.driver, cap.card, |
81 |
|
✗ |
v4l2_mplane_video(&cap) ? "mplane" : |
82 |
|
✗ |
v4l2_splane_video(&cap) ? "splane" : "unknown"); |
83 |
|
|
|
84 |
|
✗ |
if (v4l2_mplane_video(&cap)) { |
85 |
|
✗ |
s->capture.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; |
86 |
|
✗ |
s->output.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE; |
87 |
|
✗ |
return 0; |
88 |
|
|
} |
89 |
|
|
|
90 |
|
✗ |
if (v4l2_splane_video(&cap)) { |
91 |
|
✗ |
s->capture.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
92 |
|
✗ |
s->output.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; |
93 |
|
✗ |
return 0; |
94 |
|
|
} |
95 |
|
|
|
96 |
|
✗ |
return AVERROR(EINVAL); |
97 |
|
|
} |
98 |
|
|
|
99 |
|
✗ |
static int v4l2_probe_driver(V4L2m2mContext *s) |
100 |
|
|
{ |
101 |
|
✗ |
void *log_ctx = s->avctx; |
102 |
|
|
int ret; |
103 |
|
|
|
104 |
|
✗ |
s->fd = open(s->devname, O_RDWR | O_NONBLOCK, 0); |
105 |
|
✗ |
if (s->fd < 0) |
106 |
|
✗ |
return AVERROR(errno); |
107 |
|
|
|
108 |
|
✗ |
ret = v4l2_prepare_contexts(s, 1); |
109 |
|
✗ |
if (ret < 0) |
110 |
|
✗ |
goto done; |
111 |
|
|
|
112 |
|
✗ |
ret = ff_v4l2_context_get_format(&s->output, 1); |
113 |
|
✗ |
if (ret) { |
114 |
|
✗ |
av_log(log_ctx, AV_LOG_DEBUG, "v4l2 output format not supported\n"); |
115 |
|
✗ |
goto done; |
116 |
|
|
} |
117 |
|
|
|
118 |
|
✗ |
ret = ff_v4l2_context_get_format(&s->capture, 1); |
119 |
|
✗ |
if (ret) { |
120 |
|
✗ |
av_log(log_ctx, AV_LOG_DEBUG, "v4l2 capture format not supported\n"); |
121 |
|
✗ |
goto done; |
122 |
|
|
} |
123 |
|
|
|
124 |
|
✗ |
done: |
125 |
|
✗ |
if (close(s->fd) < 0) { |
126 |
|
✗ |
ret = AVERROR(errno); |
127 |
|
✗ |
av_log(log_ctx, AV_LOG_ERROR, "failure closing %s (%s)\n", s->devname, av_err2str(AVERROR(errno))); |
128 |
|
|
} |
129 |
|
|
|
130 |
|
✗ |
s->fd = -1; |
131 |
|
|
|
132 |
|
✗ |
return ret; |
133 |
|
|
} |
134 |
|
|
|
135 |
|
✗ |
static int v4l2_configure_contexts(V4L2m2mContext *s) |
136 |
|
|
{ |
137 |
|
✗ |
void *log_ctx = s->avctx; |
138 |
|
|
int ret; |
139 |
|
|
struct v4l2_format ofmt, cfmt; |
140 |
|
|
|
141 |
|
✗ |
s->fd = open(s->devname, O_RDWR | O_NONBLOCK, 0); |
142 |
|
✗ |
if (s->fd < 0) |
143 |
|
✗ |
return AVERROR(errno); |
144 |
|
|
|
145 |
|
✗ |
ret = v4l2_prepare_contexts(s, 0); |
146 |
|
✗ |
if (ret < 0) |
147 |
|
✗ |
goto error; |
148 |
|
|
|
149 |
|
✗ |
ofmt = s->output.format; |
150 |
|
✗ |
cfmt = s->capture.format; |
151 |
|
✗ |
av_log(log_ctx, AV_LOG_INFO, "requesting formats: output=%s capture=%s\n", |
152 |
|
✗ |
av_fourcc2str(V4L2_TYPE_IS_MULTIPLANAR(ofmt.type) ? |
153 |
|
|
ofmt.fmt.pix_mp.pixelformat : |
154 |
|
|
ofmt.fmt.pix.pixelformat), |
155 |
|
✗ |
av_fourcc2str(V4L2_TYPE_IS_MULTIPLANAR(cfmt.type) ? |
156 |
|
|
cfmt.fmt.pix_mp.pixelformat : |
157 |
|
|
cfmt.fmt.pix.pixelformat)); |
158 |
|
|
|
159 |
|
✗ |
ret = ff_v4l2_context_set_format(&s->output); |
160 |
|
✗ |
if (ret) { |
161 |
|
✗ |
av_log(log_ctx, AV_LOG_ERROR, "can't set v4l2 output format\n"); |
162 |
|
✗ |
goto error; |
163 |
|
|
} |
164 |
|
|
|
165 |
|
✗ |
ret = ff_v4l2_context_set_format(&s->capture); |
166 |
|
✗ |
if (ret) { |
167 |
|
✗ |
av_log(log_ctx, AV_LOG_ERROR, "can't to set v4l2 capture format\n"); |
168 |
|
✗ |
goto error; |
169 |
|
|
} |
170 |
|
|
|
171 |
|
✗ |
ret = ff_v4l2_context_init(&s->output); |
172 |
|
✗ |
if (ret) { |
173 |
|
✗ |
av_log(log_ctx, AV_LOG_ERROR, "no v4l2 output context's buffers\n"); |
174 |
|
✗ |
goto error; |
175 |
|
|
} |
176 |
|
|
|
177 |
|
|
/* decoder's buffers need to be updated at a later stage */ |
178 |
|
✗ |
if (s->avctx && !av_codec_is_decoder(s->avctx->codec)) { |
179 |
|
✗ |
ret = ff_v4l2_context_init(&s->capture); |
180 |
|
✗ |
if (ret) { |
181 |
|
✗ |
av_log(log_ctx, AV_LOG_ERROR, "no v4l2 capture context's buffers\n"); |
182 |
|
✗ |
goto error; |
183 |
|
|
} |
184 |
|
|
} |
185 |
|
|
|
186 |
|
✗ |
return 0; |
187 |
|
|
|
188 |
|
✗ |
error: |
189 |
|
✗ |
if (close(s->fd) < 0) { |
190 |
|
✗ |
ret = AVERROR(errno); |
191 |
|
✗ |
av_log(log_ctx, AV_LOG_ERROR, "error closing %s (%s)\n", |
192 |
|
✗ |
s->devname, av_err2str(AVERROR(errno))); |
193 |
|
|
} |
194 |
|
✗ |
s->fd = -1; |
195 |
|
|
|
196 |
|
✗ |
return ret; |
197 |
|
|
} |
198 |
|
|
|
199 |
|
|
/****************************************************************************** |
200 |
|
|
* |
201 |
|
|
* V4L2 M2M Interface |
202 |
|
|
* |
203 |
|
|
******************************************************************************/ |
204 |
|
✗ |
int ff_v4l2_m2m_codec_reinit(V4L2m2mContext *s) |
205 |
|
|
{ |
206 |
|
✗ |
void *log_ctx = s->avctx; |
207 |
|
|
int ret; |
208 |
|
|
|
209 |
|
✗ |
av_log(log_ctx, AV_LOG_DEBUG, "reinit context\n"); |
210 |
|
|
|
211 |
|
|
/* 1. streamoff */ |
212 |
|
✗ |
ret = ff_v4l2_context_set_status(&s->capture, VIDIOC_STREAMOFF); |
213 |
|
✗ |
if (ret) |
214 |
|
✗ |
av_log(log_ctx, AV_LOG_ERROR, "capture VIDIOC_STREAMOFF\n"); |
215 |
|
|
|
216 |
|
|
/* 2. unmap the capture buffers (v4l2 and ffmpeg): |
217 |
|
|
* we must wait for all references to be released before being allowed |
218 |
|
|
* to queue new buffers. |
219 |
|
|
*/ |
220 |
|
✗ |
av_log(log_ctx, AV_LOG_DEBUG, "waiting for user to release AVBufferRefs\n"); |
221 |
|
✗ |
if (atomic_load(&s->refcount)) |
222 |
|
✗ |
while(sem_wait(&s->refsync) == -1 && errno == EINTR); |
223 |
|
|
|
224 |
|
✗ |
ff_v4l2_context_release(&s->capture); |
225 |
|
|
|
226 |
|
|
/* 3. get the new capture format */ |
227 |
|
✗ |
ret = ff_v4l2_context_get_format(&s->capture, 0); |
228 |
|
✗ |
if (ret) { |
229 |
|
✗ |
av_log(log_ctx, AV_LOG_ERROR, "query the new capture format\n"); |
230 |
|
✗ |
return ret; |
231 |
|
|
} |
232 |
|
|
|
233 |
|
|
/* 4. set the capture format */ |
234 |
|
✗ |
ret = ff_v4l2_context_set_format(&s->capture); |
235 |
|
✗ |
if (ret) { |
236 |
|
✗ |
av_log(log_ctx, AV_LOG_ERROR, "setting capture format\n"); |
237 |
|
✗ |
return ret; |
238 |
|
|
} |
239 |
|
|
|
240 |
|
|
/* 5. complete reinit */ |
241 |
|
✗ |
s->draining = 0; |
242 |
|
✗ |
s->reinit = 0; |
243 |
|
|
|
244 |
|
✗ |
return 0; |
245 |
|
|
} |
246 |
|
|
|
247 |
|
✗ |
static void v4l2_m2m_destroy_context(void *opaque, uint8_t *context) |
248 |
|
|
{ |
249 |
|
✗ |
V4L2m2mContext *s = (V4L2m2mContext*)context; |
250 |
|
|
|
251 |
|
✗ |
ff_v4l2_context_release(&s->capture); |
252 |
|
✗ |
sem_destroy(&s->refsync); |
253 |
|
|
|
254 |
|
✗ |
if (s->fd >= 0) |
255 |
|
✗ |
close(s->fd); |
256 |
|
✗ |
av_frame_unref(s->frame); |
257 |
|
✗ |
av_frame_free(&s->frame); |
258 |
|
✗ |
av_packet_unref(&s->buf_pkt); |
259 |
|
|
|
260 |
|
✗ |
av_free(s); |
261 |
|
|
} |
262 |
|
|
|
263 |
|
✗ |
int ff_v4l2_m2m_codec_end(V4L2m2mPriv *priv) |
264 |
|
|
{ |
265 |
|
✗ |
V4L2m2mContext *s = priv->context; |
266 |
|
|
int ret; |
267 |
|
|
|
268 |
|
✗ |
if (!s) |
269 |
|
✗ |
return 0; |
270 |
|
|
|
271 |
|
✗ |
if (s->fd >= 0) { |
272 |
|
✗ |
ret = ff_v4l2_context_set_status(&s->output, VIDIOC_STREAMOFF); |
273 |
|
✗ |
if (ret) |
274 |
|
✗ |
av_log(s->avctx, AV_LOG_ERROR, "VIDIOC_STREAMOFF %s\n", s->output.name); |
275 |
|
|
|
276 |
|
✗ |
ret = ff_v4l2_context_set_status(&s->capture, VIDIOC_STREAMOFF); |
277 |
|
✗ |
if (ret) |
278 |
|
✗ |
av_log(s->avctx, AV_LOG_ERROR, "VIDIOC_STREAMOFF %s\n", s->capture.name); |
279 |
|
|
} |
280 |
|
|
|
281 |
|
✗ |
ff_v4l2_context_release(&s->output); |
282 |
|
|
|
283 |
|
✗ |
s->self_ref = NULL; |
284 |
|
✗ |
av_buffer_unref(&priv->context_ref); |
285 |
|
|
|
286 |
|
✗ |
return 0; |
287 |
|
|
} |
288 |
|
|
|
289 |
|
✗ |
int ff_v4l2_m2m_codec_init(V4L2m2mPriv *priv) |
290 |
|
|
{ |
291 |
|
✗ |
int ret = AVERROR(EINVAL); |
292 |
|
|
struct dirent *entry; |
293 |
|
|
DIR *dirp; |
294 |
|
|
|
295 |
|
✗ |
V4L2m2mContext *s = priv->context; |
296 |
|
|
|
297 |
|
✗ |
dirp = opendir("/dev"); |
298 |
|
✗ |
if (!dirp) |
299 |
|
✗ |
return AVERROR(errno); |
300 |
|
|
|
301 |
|
✗ |
for (entry = readdir(dirp); entry; entry = readdir(dirp)) { |
302 |
|
|
|
303 |
|
✗ |
if (strncmp(entry->d_name, "video", 5)) |
304 |
|
✗ |
continue; |
305 |
|
|
|
306 |
|
✗ |
snprintf(s->devname, sizeof(s->devname), "/dev/%s", entry->d_name); |
307 |
|
✗ |
av_log(s->avctx, AV_LOG_DEBUG, "probing device %s\n", s->devname); |
308 |
|
✗ |
ret = v4l2_probe_driver(s); |
309 |
|
✗ |
if (!ret) |
310 |
|
✗ |
break; |
311 |
|
|
} |
312 |
|
|
|
313 |
|
✗ |
closedir(dirp); |
314 |
|
|
|
315 |
|
✗ |
if (ret) { |
316 |
|
✗ |
av_log(s->avctx, AV_LOG_ERROR, "Could not find a valid device\n"); |
317 |
|
✗ |
memset(s->devname, 0, sizeof(s->devname)); |
318 |
|
|
|
319 |
|
✗ |
return ret; |
320 |
|
|
} |
321 |
|
|
|
322 |
|
✗ |
av_log(s->avctx, AV_LOG_INFO, "Using device %s\n", s->devname); |
323 |
|
|
|
324 |
|
✗ |
return v4l2_configure_contexts(s); |
325 |
|
|
} |
326 |
|
|
|
327 |
|
✗ |
int ff_v4l2_m2m_create_context(V4L2m2mPriv *priv, V4L2m2mContext **s) |
328 |
|
|
{ |
329 |
|
✗ |
*s = av_mallocz(sizeof(V4L2m2mContext)); |
330 |
|
✗ |
if (!*s) |
331 |
|
✗ |
return AVERROR(ENOMEM); |
332 |
|
|
|
333 |
|
✗ |
priv->context_ref = av_buffer_create((uint8_t *) *s, sizeof(V4L2m2mContext), |
334 |
|
|
&v4l2_m2m_destroy_context, NULL, 0); |
335 |
|
✗ |
if (!priv->context_ref) { |
336 |
|
✗ |
av_freep(s); |
337 |
|
✗ |
return AVERROR(ENOMEM); |
338 |
|
|
} |
339 |
|
|
|
340 |
|
|
/* assign the context */ |
341 |
|
✗ |
priv->context = *s; |
342 |
|
✗ |
(*s)->priv = priv; |
343 |
|
|
|
344 |
|
|
/* populate it */ |
345 |
|
✗ |
priv->context->capture.num_buffers = priv->num_capture_buffers; |
346 |
|
✗ |
priv->context->output.num_buffers = priv->num_output_buffers; |
347 |
|
✗ |
priv->context->self_ref = priv->context_ref; |
348 |
|
✗ |
priv->context->fd = -1; |
349 |
|
|
|
350 |
|
✗ |
priv->context->frame = av_frame_alloc(); |
351 |
|
✗ |
if (!priv->context->frame) { |
352 |
|
✗ |
av_buffer_unref(&priv->context_ref); |
353 |
|
✗ |
*s = NULL; /* freed when unreferencing context_ref */ |
354 |
|
✗ |
return AVERROR(ENOMEM); |
355 |
|
|
} |
356 |
|
|
|
357 |
|
✗ |
return 0; |
358 |
|
|
} |
359 |
|
|
|