Merge commit '3a165c18'

* commit '3a165c18':
  v4l2: convert to stdatomic
Merged-by: Clément Bœsch <u@pkh.me>

libavdevice/v4l2-common.h

@@ -35,7 +35,6 @@
 #endif
 #include <linux/videodev2.h>
 #endif
-#include "libavutil/atomic.h"
 #include "libavutil/avassert.h"
 #include "libavutil/imgutils.h"
 #include "libavutil/log.h"

libavdevice/v4l2.c

@@ -30,6 +30,8 @@
  * V4L2_PIX_FMT_* and AV_PIX_FMT_*
  */
 
+#include <stdatomic.h>
+
 #include "v4l2-common.h"
 #include <dirent.h>
 
@@ -78,7 +80,7 @@ struct video_data {
     int64_t last_time_m;
 
     int buffers;
-    volatile int buffers_queued;
+    atomic_int buffers_queued;
     void **buf_start;
     unsigned int *buf_len;
     char *standard;
@@ -402,7 +404,7 @@ static int enqueue_buffer(struct video_data *s, struct v4l2_buffer *buf)
         res = AVERROR(errno);
         av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n", av_err2str(res));
     } else {
-        avpriv_atomic_int_add_and_fetch(&s->buffers_queued, 1);
+        atomic_fetch_add(&s->buffers_queued, 1);
     }
 
     return res;
@@ -510,9 +512,9 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt)
         av_log(ctx, AV_LOG_ERROR, "Invalid buffer index received.\n");
         return AVERROR(EINVAL);
     }
-    avpriv_atomic_int_add_and_fetch(&s->buffers_queued, -1);
+    atomic_fetch_add(&s->buffers_queued, -1);
     // always keep at least one buffer queued
-    av_assert0(avpriv_atomic_int_get(&s->buffers_queued) >= 1);
+    av_assert0(atomic_load(&s->buffers_queued) >= 1);
 
 #ifdef V4L2_BUF_FLAG_ERROR
     if (buf.flags & V4L2_BUF_FLAG_ERROR) {
@@ -538,7 +540,7 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt)
     }
 
     /* Image is at s->buff_start[buf.index] */
-    if (avpriv_atomic_int_get(&s->buffers_queued) == FFMAX(s->buffers / 8, 1)) {
+    if (atomic_load(&s->buffers_queued) == FFMAX(s->buffers / 8, 1)) {
         /* when we start getting low on queued buffers, fall back on copying data */
         res = av_new_packet(pkt, buf.bytesused);
         if (res < 0) {
@@ -607,7 +609,7 @@ static int mmap_start(AVFormatContext *ctx)
             return res;
         }
     }
-    s->buffers_queued = s->buffers;
+    atomic_store(&s->buffers_queued, s->buffers);
 
     type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
     if (v4l2_ioctl(s->fd, VIDIOC_STREAMON, &type) < 0) {
@@ -1000,7 +1002,7 @@ static int v4l2_read_close(AVFormatContext *ctx)
 {
     struct video_data *s = ctx->priv_data;
 
-    if (avpriv_atomic_int_get(&s->buffers_queued) != s->buffers)
+    if (atomic_load(&s->buffers_queued) != s->buffers)
         av_log(ctx, AV_LOG_WARNING, "Some buffers are still owned by the caller on "
                "close.\n");