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Code Issues Releases Activity

fbdev: add a framerate private option.

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This commit is contained in:
Anton Khirnov 2011-05-24 21:16:47 +02:00
parent 3e3db4d93d
commit 1556186a62
1 changed files with 36 additions and 12 deletions
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48
libavdevice/fbdev.c
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@ -37,7 +37,10 @@
#include <time.h>
#include <linux/fb.h>
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavformat/avformat.h"
@ -74,8 +77,10 @@ static enum PixelFormat get_pixfmt_from_fb_varinfo(struct fb_var_screeninfo *var
}
typedef struct {
AVClass *class; ///< class for private options
int frame_size; ///< size in bytes of a grabbed frame
AVRational time_base; ///< time base
AVRational fps; ///< framerate
char *framerate; ///< framerate string set by a private option
int64_t time_frame; ///< time for the next frame to output (in 1/1000000 units)
int fd; ///< framebuffer device file descriptor
@ -97,16 +102,21 @@ av_cold static int fbdev_read_header(AVFormatContext *avctx,
enum PixelFormat pix_fmt;
int ret, flags = O_RDONLY;
ret = av_parse_video_rate(&fbdev->fps, fbdev->framerate);
av_freep(&fbdev->framerate);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Couldn't parse framerate.\n");
return ret;
}
#if FF_API_FORMAT_PARAMETERS
if (ap->time_base.num)
fbdev->fps = (AVRational){ap->time_base.den, ap->time_base.num};
#endif
if (!(st = av_new_stream(avctx, 0)))
return AVERROR(ENOMEM);
av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in microseconds */
if (ap->time_base.den <= 0) {
av_log(avctx, AV_LOG_ERROR, "Invalid time base %d/%d\n",
ap->time_base.num, ap->time_base.den);
return AVERROR(EINVAL);
}
/* NONBLOCK is ignored by the fbdev driver, only set for consistency */
if (avctx->flags & AVFMT_FLAG_NONBLOCK)
flags |= O_NONBLOCK;
@ -146,7 +156,6 @@ av_cold static int fbdev_read_header(AVFormatContext *avctx,
fbdev->bytes_per_pixel = (fbdev->varinfo.bits_per_pixel + 7) >> 3;
fbdev->frame_linesize = fbdev->width * fbdev->bytes_per_pixel;
fbdev->frame_size = fbdev->frame_linesize * fbdev->heigth;
fbdev->time_base = ap->time_base;
fbdev->time_frame = AV_NOPTS_VALUE;
fbdev->data = mmap(NULL, fbdev->fixinfo.smem_len, PROT_READ, MAP_SHARED, fbdev->fd, 0);
if (fbdev->data == MAP_FAILED) {
@ -162,13 +171,13 @@ av_cold static int fbdev_read_header(AVFormatContext *avctx,
st->codec->pix_fmt = pix_fmt;
st->codec->time_base = ap->time_base;
st->codec->bit_rate =
fbdev->width * fbdev->heigth * fbdev->bytes_per_pixel / av_q2d(ap->time_base) * 8;
fbdev->width * fbdev->heigth * fbdev->bytes_per_pixel * av_q2d(fbdev->fps) * 8;
av_log(avctx, AV_LOG_INFO,
"w:%d h:%d bpp:%d pixfmt:%s tb:%d/%d bit_rate:%d\n",
"w:%d h:%d bpp:%d pixfmt:%s fps:%d/%d bit_rate:%d\n",
fbdev->width, fbdev->heigth, fbdev->varinfo.bits_per_pixel,
av_pix_fmt_descriptors[pix_fmt].name,
ap->time_base.num, ap->time_base.den,
fbdev->fps.num, fbdev->fps.den,
st->codec->bit_rate);
return 0;
@ -202,7 +211,7 @@ static int fbdev_read_packet(AVFormatContext *avctx, AVPacket *pkt)
while (nanosleep(&ts, &ts) < 0 && errno == EINTR);
}
/* compute the time of the next frame */
fbdev->time_frame += INT64_C(1000000) * av_q2d(fbdev->time_base);
fbdev->time_frame += INT64_C(1000000) / av_q2d(fbdev->fps);
if ((ret = av_new_packet(pkt, fbdev->frame_size)) < 0)
return ret;
@ -239,6 +248,20 @@ av_cold static int fbdev_read_close(AVFormatContext *avctx)
return 0;
}
#define OFFSET(x) offsetof(FBDevContext, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
{ "framerate","", OFFSET(framerate), FF_OPT_TYPE_STRING, {.str = "25"}, 0, 0, DEC },
{ NULL },
};
static const AVClass fbdev_class = {
.class_name = "fbdev indev",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
AVInputFormat ff_fbdev_demuxer = {
.name = "fbdev",
.long_name = NULL_IF_CONFIG_SMALL("Linux framebuffer"),
@ -247,4 +270,5 @@ AVInputFormat ff_fbdev_demuxer = {
.read_packet = fbdev_read_packet,
.read_close = fbdev_read_close,
.flags = AVFMT_NOFILE,
.priv_class = &fbdev_class,
};