24 #include <linux/videodev2.h> 25 #include <sys/ioctl.h> 41 if (cap->capabilities & (V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT) &&
42 cap->capabilities & V4L2_CAP_STREAMING)
45 if (cap->capabilities & V4L2_CAP_VIDEO_M2M)
53 if (cap->capabilities & (V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE) &&
54 cap->capabilities & V4L2_CAP_STREAMING)
57 if (cap->capabilities & V4L2_CAP_VIDEO_M2M_MPLANE)
65 struct v4l2_capability cap;
66 void *log_ctx = s->
avctx;
75 memset(&cap, 0,
sizeof(cap));
76 ret = ioctl(s->
fd, VIDIOC_QUERYCAP, &cap);
81 "driver '%s' on card '%s' in %s mode\n", cap.driver, cap.card,
86 s->
capture.
type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
87 s->
output.
type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
102 void *log_ctx = s->
avctx;
105 s->
fd = open(s->
devname, O_RDWR | O_NONBLOCK, 0);
126 if (close(s->
fd) < 0) {
138 void *log_ctx = s->
avctx;
140 struct v4l2_format ofmt, cfmt;
142 s->
fd = open(s->
devname, O_RDWR | O_NONBLOCK, 0);
154 ofmt.fmt.pix_mp.pixelformat :
155 ofmt.fmt.pix.pixelformat),
157 cfmt.fmt.pix_mp.pixelformat :
158 cfmt.fmt.pix.pixelformat));
190 if (close(s->
fd) < 0) {
207 void *log_ctx = s->
avctx;
250 void *log_ctx = s->
avctx;
360 struct dirent *entry;
365 dirp = opendir(
"/dev");
369 for (entry = readdir(dirp); entry; entry = readdir(dirp)) {
371 if (strncmp(entry->d_name,
"video", 5))
const struct AVCodec * codec
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
const char * name
context name.
int ff_v4l2_context_init(V4L2Context *ctx)
Initializes a V4L2Context.
int av_codec_is_decoder(const AVCodec *codec)
int ff_v4l2_m2m_codec_end(V4L2m2mPriv *priv)
Releases all the codec resources if all AVBufferRefs have been returned to the ctx.
static void error(const char *err)
void ff_v4l2_context_release(V4L2Context *ctx)
Releases a V4L2Context.
int ff_v4l2_context_set_format(V4L2Context *ctx)
Sets the V4L2Context format in the v4l2 driver.
int ff_v4l2_context_get_format(V4L2Context *ctx, int probe)
Queries the driver for a valid v4l2 format and copies it to the context.
int ff_v4l2_m2m_codec_init(V4L2m2mPriv *priv)
Probes the video nodes looking for the required codec capabilities.
int ff_v4l2_m2m_create_context(V4L2m2mPriv *priv, V4L2m2mContext **s)
Allocate a new context and references for a V4L2 M2M instance.
int ff_v4l2_m2m_codec_reinit(V4L2m2mContext *s)
Reinitializes the V4L2m2mContext when the driver cannot continue processing with the capture paramete...
int done
Either no more buffers available or an unrecoverable error was notified by the V4L2 kernel driver: on...
static int v4l2_probe_driver(V4L2m2mContext *s)
static void v4l2_m2m_destroy_context(void *opaque, uint8_t *context)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define atomic_load(object)
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
#define av_fourcc2str(fourcc)
#define sem_destroy(psem)
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
AVBufferRef * av_buffer_create(uint8_t *data, int size, void(*free)(void *opaque, uint8_t *data), void *opaque, int flags)
Create an AVBuffer from an existing array.
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
struct v4l2_format format
Format returned by the driver after initializing the buffer context.
int ff_v4l2_context_set_status(V4L2Context *ctx, uint32_t cmd)
Sets the status of a V4L2Context.
#define AV_LOG_INFO
Standard information.
Libavcodec external API header.
int ff_v4l2_m2m_codec_full_reinit(V4L2m2mContext *s)
Reinitializes the V4L2m2mContext when the driver cannot continue processing with the any of the curre...
static int v4l2_configure_contexts(V4L2m2mContext *s)
static int v4l2_splane_video(struct v4l2_capability *cap)
static int probe(const AVProbeData *p)
common internal api header.
static int v4l2_prepare_contexts(V4L2m2mContext *s, int probe)
int num_buffers
Readonly after init.
#define atomic_init(obj, value)
AVBufferRef * context_ref
enum v4l2_buf_type type
Type of this buffer context.
static int v4l2_mplane_video(struct v4l2_capability *cap)