32 #include <sys/ioctl.h> 89 "Could not open framebuffer device '%s': %s\n",
94 if (ioctl(fbdev->
fd, FBIOGET_VSCREENINFO, &fbdev->
varinfo) < 0) {
101 if (ioctl(fbdev->
fd, FBIOGET_FSCREENINFO, &fbdev->
fixinfo) < 0) {
104 "FBIOGET_FSCREENINFO: %s\n",
av_err2str(ret));
112 "Framebuffer pixel format not supported.\n");
122 fbdev->
data = mmap(
NULL, fbdev->
fixinfo.smem_len, PROT_READ, MAP_SHARED, fbdev->
fd, 0);
123 if (fbdev->
data == MAP_FAILED) {
139 "w:%d h:%d bpp:%d pixfmt:%s fps:%d/%d bit_rate:%"PRId64
"\n",
154 int64_t curtime, delay;
167 "time_frame:%"PRId64
" curtime:%"PRId64
" delay:%"PRId64
"\n",
175 ts.tv_sec = delay / 1000000;
176 ts.tv_nsec = (delay % 1000000) * 1000;
177 while (nanosleep(&ts, &ts) < 0 && errno == EINTR);
184 if (ioctl(fbdev->
fd, FBIOGET_VSCREENINFO, &fbdev->
varinfo) < 0) {
196 for (i = 0; i < fbdev->
height; i++) {
198 pin += fbdev->
fixinfo.line_length;
220 #define OFFSET(x) offsetof(FBDevContext, x) 221 #define DEC AV_OPT_FLAG_DECODING_PARAM 244 .priv_class = &fbdev_class,
int height
assumed frame resolution
static enum AVPixelFormat pix_fmt
static const AVClass fbdev_class
#define AV_LOG_WARNING
Something somehow does not look correct.
#define LIBAVUTIL_VERSION_INT
Memory handling functions.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
const char * av_default_item_name(void *ptr)
Return the context name.
const char * ff_fbdev_default_device()
int frame_linesize
linesize of the output frame, it is assumed to be constant
int frame_size
size in bytes of a grabbed frame
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
struct fb_var_screeninfo varinfo
variable info;
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
int avpriv_open(const char *filename, int flags,...)
A wrapper for open() setting O_CLOEXEC.
int64_t time_frame
time for the next frame to output (in 1/1000000 units)
int flags
Flags modifying the (de)muxer behaviour.
static double av_q2d(AVRational a)
Convert an AVRational to a double.
static av_cold int read_close(AVFormatContext *ctx)
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Main libavdevice API header.
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
char * url
input or output URL.
static int fbdev_read_packet(AVFormatContext *avctx, AVPacket *pkt)
enum AVMediaType codec_type
General type of the encoded data.
AVRational avg_frame_rate
Average framerate.
static av_cold int fbdev_read_close(AVFormatContext *avctx)
struct fb_fix_screeninfo fixinfo
fixed info;
common internal API header
static const AVOption options[]
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
AVRational framerate_q
framerate
static int read_header(FFV1Context *f)
int64_t av_gettime(void)
Get the current time in microseconds.
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
#define AV_LOG_INFO
Standard information.
AVInputFormat ff_fbdev_demuxer
int ff_fbdev_get_device_list(AVDeviceInfoList *device_list)
static int fbdev_get_device_list(AVFormatContext *s, AVDeviceInfoList *device_list)
Describe the class of an AVClass context structure.
Rational number (pair of numerator and denominator).
offset must point to AVRational
int64_t av_gettime_relative(void)
Get the current time in microseconds since some unspecified starting point.
#define flags(name, subs,...)
enum AVPixelFormat ff_get_pixfmt_from_fb_varinfo(struct fb_var_screeninfo *varinfo)
static av_cold int fbdev_read_header(AVFormatContext *avctx)
void * priv_data
Format private data.
uint8_t * data
framebuffer data
AVCodecParameters * codecpar
Codec parameters associated with this stream.
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.
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
AVPixelFormat
Pixel format.
This structure stores compressed data.
int fd
framebuffer device file descriptor
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
#define AV_NOPTS_VALUE
Undefined timestamp value.