@@ -80,6 +80,7 @@ version <next>:

 - Bitmap Brothers JV playback system

 - Apple HTTP Live Streaming protocol handler

 - sndio support for playback and record

+- Linux framebuffer input device added

 version 0.6:

@@ -1430,6 +1430,7 @@ alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"

 alsa_outdev_deps="alsa_asoundlib_h"

 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"

 dv1394_indev_deps="dv1394 dv_demuxer"

+fbdev_indev_deps="linux_fb_h"

 jack_indev_deps="jack_jack_h"

 libdc1394_indev_deps="libdc1394"

 oss_indev_deps_any="soundcard_h sys_soundcard_h"

@@ -2897,6 +2898,7 @@ fi

 texi2html -version > /dev/null 2>&1 && enable texi2html || disable texi2html

+check_header linux/fb.h

 check_header linux/videodev.h

 check_header linux/videodev2.h

 check_header sys/videoio.h

@@ -59,6 +59,31 @@ BSD video input device.

 Linux DV 1394 input device.

+@section fbdev

+

+Linux framebuffer input device.

+

+The Linux framebuffer is a graphic hardware-independent abstraction

+layer to show graphics on a computer monitor, typically on the

+console. It is accessed through a file device node, usually

+@file{/dev/fb0}.

+

+For more detailed information read the file

+Documentation/fb/framebuffer.txt included in the Linux source tree.

+

+To record from the framebuffer device @file{/dev/fb0} with

+@file{ffmpeg}:

+@example

+ffmpeg -f fbdev -r 10 -i /dev/fb0 out.avi

+@end example

+

+You can take a single screenshot image with the command:

+@example

+ffmpeg -f fbdev -vframes 1 -r 1 -i /dev/fb0 screenshot.jpeg

+@end example

+

+See also @url{http://linux-fbdev.sourceforge.net/}, and fbset(1).

+

 @section jack

 JACK input device.

@@ -14,6 +14,7 @@ OBJS-$(CONFIG_ALSA_OUTDEV)               += alsa-audio-common.o \

                                             alsa-audio-enc.o

 OBJS-$(CONFIG_BKTR_INDEV)                += bktr.o

 OBJS-$(CONFIG_DV1394_INDEV)              += dv1394.o

+OBJS-$(CONFIG_FBDEV_INDEV)               += fbdev.o

 OBJS-$(CONFIG_JACK_INDEV)                += jack_audio.o

 OBJS-$(CONFIG_OSS_INDEV)                 += oss_audio.o

 OBJS-$(CONFIG_OSS_OUTDEV)                += oss_audio.o

@@ -42,6 +42,7 @@ void avdevice_register_all(void)

     REGISTER_INOUTDEV (ALSA, alsa);

     REGISTER_INDEV    (BKTR, bktr);

     REGISTER_INDEV    (DV1394, dv1394);

+    REGISTER_INDEV    (FBDEV, fbdev);

     REGISTER_INDEV    (JACK, jack);

     REGISTER_INOUTDEV (OSS, oss);

     REGISTER_INOUTDEV (SNDIO, sndio);

@@ -22,7 +22,7 @@

 #include "libavutil/avutil.h"

 #define LIBAVDEVICE_VERSION_MAJOR 52

-#define LIBAVDEVICE_VERSION_MINOR  3

+#define LIBAVDEVICE_VERSION_MINOR  4

 #define LIBAVDEVICE_VERSION_MICRO  0

 #define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \

new file mode 100644

@@ -0,0 +1,250 @@

+/*

+ * Copyright (c) 2011 Stefano Sabatini

+ * Copyright (c) 2009 Giliard B. de Freitas <giliarde@gmail.com>

+ * Copyright (C) 2002 Gunnar Monell <gmo@linux.nu>

+ *

+ * This file is part of Libav.

+ *

+ * Libav is free software; you can redistribute it and/or

+ * modify it under the terms of the GNU Lesser General Public

+ * License as published by the Free Software Foundation; either

+ * version 2.1 of the License, or (at your option) any later version.

+ *

+ * Libav is distributed in the hope that it will be useful,

+ * but WITHOUT ANY WARRANTY; without even the implied warranty of

+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

+ * Lesser General Public License for more details.

+ *

+ * You should have received a copy of the GNU Lesser General Public

+ * License along with Libav; if not, write to the Free Software

+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

+ */

+

+/**

+ * @file

+ * Linux framebuffer input device,

+ * inspired by code from fbgrab.c by Gunnar Monell.

+ * See also http://linux-fbdev.sourceforge.net/.

+ */

+

+/* #define DEBUG */

+

+#include <unistd.h>

+#include <fcntl.h>

+#include <sys/ioctl.h>

+#include <sys/time.h>

+#include <sys/mman.h>

+#include <time.h>

+#include <linux/fb.h>

+

+#include "libavutil/mem.h"

+#include "libavutil/pixdesc.h"

+#include "libavformat/avformat.h"

+

+struct rgb_pixfmt_map_entry {

+    int bits_per_pixel;

+    int red_offset, green_offset, blue_offset, alpha_offset;

+    enum PixelFormat pixfmt;

+};

+

+static struct rgb_pixfmt_map_entry rgb_pixfmt_map[] = {

+    // bpp, red_offset,  green_offset, blue_offset, alpha_offset, pixfmt

+    {  32,       0,           8,          16,           24,   PIX_FMT_RGBA  },

+    {  32,      16,           8,           0,           24,   PIX_FMT_BGRA  },

+    {  32,       8,          16,          24,            0,   PIX_FMT_ARGB  },

+    {  32,       3,           2,           8,            0,   PIX_FMT_ABGR  },

+    {  24,       0,           8,          16,            0,   PIX_FMT_RGB24 },

+    {  24,      16,           8,           0,            0,   PIX_FMT_BGR24 },

+};

+

+static enum PixelFormat get_pixfmt_from_fb_varinfo(struct fb_var_screeninfo *varinfo)

+{

+    int i;

+

+    for (i = 0; i < FF_ARRAY_ELEMS(rgb_pixfmt_map); i++) {

+        struct rgb_pixfmt_map_entry *entry = &rgb_pixfmt_map[i];

+        if (entry->bits_per_pixel == varinfo->bits_per_pixel &&

+            entry->red_offset     == varinfo->red.offset     &&

+            entry->green_offset   == varinfo->green.offset   &&

+            entry->blue_offset    == varinfo->blue.offset)

+            return entry->pixfmt;

+    }

+

+    return PIX_FMT_NONE;

+}

+

+typedef struct {

+    int frame_size;          ///< size in bytes of a grabbed frame

+    AVRational time_base;    ///< time base

+    int64_t time_frame;      ///< time for the next frame to output (in 1/1000000 units)

+

+    int fd;                  ///< framebuffer device file descriptor

+    int width, heigth;       ///< assumed frame resolution

+    int frame_linesize;      ///< linesize of the output frame, it is assumed to be constant

+    int bytes_per_pixel;

+

+    struct fb_var_screeninfo varinfo; ///< variable info;

+    struct fb_fix_screeninfo fixinfo; ///< fixed    info;

+

+    uint8_t *data;           ///< framebuffer data

+} FBDevContext;

+

+av_cold static int fbdev_read_header(AVFormatContext *avctx,

+                                     AVFormatParameters *ap)

+{

+    FBDevContext *fbdev = avctx->priv_data;

+    AVStream *st = NULL;

+    enum PixelFormat pix_fmt;

+    int ret, flags = O_RDONLY;

+

+    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;

+

+    if ((fbdev->fd = open(avctx->filename, flags)) == -1) {

+        ret = AVERROR(errno);

+        av_log(avctx, AV_LOG_ERROR,

+               "Could not open framebuffer device '%s': %s\n",

+               avctx->filename, strerror(ret));

+        return ret;

+    }

+

+    if (ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->varinfo) < 0) {

+        ret = AVERROR(errno);

+        av_log(avctx, AV_LOG_ERROR,

+               "FBIOGET_VSCREENINFO: %s\n", strerror(errno));

+        goto fail;

+    }

+

+    if (ioctl(fbdev->fd, FBIOGET_FSCREENINFO, &fbdev->fixinfo) < 0) {

+        ret = AVERROR(errno);

+        av_log(avctx, AV_LOG_ERROR,

+               "FBIOGET_FSCREENINFO: %s\n", strerror(errno));

+        goto fail;

+    }

+

+    pix_fmt = get_pixfmt_from_fb_varinfo(&fbdev->varinfo);

+    if (pix_fmt == PIX_FMT_NONE) {

+        ret = AVERROR(EINVAL);

+        av_log(avctx, AV_LOG_ERROR,

+               "Framebuffer pixel format not supported.\n");

+        goto fail;

+    }

+

+    fbdev->width           = fbdev->varinfo.xres;

+    fbdev->heigth          = fbdev->varinfo.yres;

+    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) {

+        ret = AVERROR(errno);

+        av_log(avctx, AV_LOG_ERROR, "Error in mmap(): %s\n", strerror(errno));

+        goto fail;

+    }

+

+    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;

+    st->codec->codec_id   = CODEC_ID_RAWVIDEO;

+    st->codec->width      = fbdev->width;

+    st->codec->height     = fbdev->heigth;

+    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;

+

+    av_log(avctx, AV_LOG_INFO,

+           "w:%d h:%d bpp:%d pixfmt:%s tb:%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,

+           st->codec->bit_rate);

+    return 0;

+

+fail:

+    close(fbdev->fd);

+    return ret;

+}

+

+static int fbdev_read_packet(AVFormatContext *avctx, AVPacket *pkt)

+{

+    FBDevContext *fbdev = avctx->priv_data;

+    int64_t curtime, delay;

+    struct timespec ts;

+    int i, ret;

+    uint8_t *pin, *pout;

+

+    if (fbdev->time_frame == AV_NOPTS_VALUE)

+        fbdev->time_frame = av_gettime();

+

+    /* wait based on the frame rate */

+    curtime = av_gettime();

+    delay = fbdev->time_frame - curtime;

+    av_dlog(avctx,

+            "time_frame:%"PRId64" curtime:%"PRId64" delay:%"PRId64"\n",

+            fbdev->time_frame, curtime, delay);

+    if (delay > 0) {

+        if (avctx->flags & AVFMT_FLAG_NONBLOCK)

+            return AVERROR(EAGAIN);

+        ts.tv_sec  =  delay / 1000000;

+        ts.tv_nsec = (delay % 1000000) * 1000;

+        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);

+

+    if ((ret = av_new_packet(pkt, fbdev->frame_size)) < 0)

+        return ret;

+

+    /* refresh fbdev->varinfo, visible data position may change at each call */

+    if (ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->varinfo) < 0)

+        av_log(avctx, AV_LOG_WARNING,

+               "Error refreshing variable info: %s\n", strerror(errno));

+

+    pkt->pts = curtime;

+

+    /* compute visible data offset */

+    pin = fbdev->data + fbdev->bytes_per_pixel * fbdev->varinfo.xoffset +

+                        fbdev->varinfo.yoffset * fbdev->fixinfo.line_length;

+    pout = pkt->data;

+

+    // TODO it'd be nice if the lines were aligned

+    for (i = 0; i < fbdev->heigth; i++) {

+        memcpy(pout, pin, fbdev->frame_linesize);

+        pin  += fbdev->fixinfo.line_length;

+        pout += fbdev->frame_linesize;

+    }

+

+    return fbdev->frame_size;

+}

+

+av_cold static int fbdev_read_close(AVFormatContext *avctx)

+{

+    FBDevContext *fbdev = avctx->priv_data;

+

+    munmap(fbdev->data, fbdev->frame_size);

+    close(fbdev->fd);

+

+    return 0;

+}

+

+AVInputFormat ff_fbdev_demuxer = {

+    .name           = "fbdev",

+    .long_name      = NULL_IF_CONFIG_SMALL("Linux framebuffer"),

+    .priv_data_size = sizeof(FBDevContext),

+    .read_header    = fbdev_read_header,

+    .read_packet    = fbdev_read_packet,

+    .read_close     = fbdev_read_close,

+    .flags          = AVFMT_NOFILE,

+};