aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorLukasz Marek <lukasz.m.luki@gmail.com>2013-10-16 17:18:55 +0200
committerStefano Sabatini <stefasab@gmail.com>2013-10-24 08:16:17 +0200
commit759388aa717ad2749e7024b7b8e32d4641390369 (patch)
tree4d0be9db90fd97f9930cddb6ad148ea877f55e47
parentff9d11f95debed37457f0dc94a0c599a4801b0f1 (diff)
downloadffmpeg-759388aa717ad2749e7024b7b8e32d4641390369.tar.gz
lavd: add fbdev output device
Signed-off-by: Lukasz Marek <lukasz.m.luki@gmail.com> Signed-off-by: Stefano Sabatini <stefasab@gmail.com>
-rw-r--r--Changelog1
-rwxr-xr-xconfigure1
-rw-r--r--doc/outdevs.texi29
-rw-r--r--libavdevice/Makefile1
-rw-r--r--libavdevice/alldevices.c2
-rw-r--r--libavdevice/fbdev_enc.c253
-rw-r--r--libavdevice/version.h2
7 files changed, 287 insertions, 2 deletions
diff --git a/Changelog b/Changelog
index 772d0a969d..45e2aaafed 100644
--- a/Changelog
+++ b/Changelog
@@ -42,6 +42,7 @@ version <next>
- PulseAudio output device
- ReplayGain scanner
- Enhanced Low Delay AAC (ER AAC ELD) decoding (no LD SBR support)
+- Linux framebuffer output device
version 2.0:
diff --git a/configure b/configure
index 75d523dc3d..bc111f4613 100755
--- a/configure
+++ b/configure
@@ -2125,6 +2125,7 @@ dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid"
dv1394_indev_deps="dv1394"
dv1394_indev_select="dv_demuxer"
fbdev_indev_deps="linux_fb_h"
+fbdev_outdev_deps="linux_fb_h"
iec61883_indev_deps="libiec61883"
jack_indev_deps="jack_jack_h sem_timedwait"
lavfi_indev_deps="avfilter"
diff --git a/doc/outdevs.texi b/doc/outdevs.texi
index 55c9110fa3..c7372254bb 100644
--- a/doc/outdevs.texi
+++ b/doc/outdevs.texi
@@ -104,6 +104,35 @@ ffmpeg -i INPUT -pix_fmt rgb24 -f caca -list_dither colors -
@end example
@end itemize
+@section fbdev
+
+Linux framebuffer output 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
+@file{Documentation/fb/framebuffer.txt} included in the Linux source tree.
+
+@subsection Options
+@table @option
+
+@item xoffset
+@item yoffset
+Set x/y coordinate of top left corner. Default is 0.
+@end table
+
+@subsection Examples
+Play a file on framebuffer device @file{/dev/fb0}.
+Required pixel format depends on current framebuffer settings.
+@example
+ffmpeg -re -i INPUT -vcodec rawvideo -pix_fmt bgra -f fbdev /dev/fb0
+@end example
+
+See also @url{http://linux-fbdev.sourceforge.net/}, and fbset(1).
+
@section oss
OSS (Open Sound System) output device.
diff --git a/libavdevice/Makefile b/libavdevice/Makefile
index ad959ee5d6..f6f05e5a99 100644
--- a/libavdevice/Makefile
+++ b/libavdevice/Makefile
@@ -24,6 +24,7 @@ OBJS-$(CONFIG_DSHOW_INDEV) += dshow.o dshow_enummediatypes.o \
dshow_pin.o dshow_common.o
OBJS-$(CONFIG_DV1394_INDEV) += dv1394.o
OBJS-$(CONFIG_FBDEV_INDEV) += fbdev.o
+OBJS-$(CONFIG_FBDEV_OUTDEV) += fbdev_enc.o
OBJS-$(CONFIG_IEC61883_INDEV) += iec61883.o
OBJS-$(CONFIG_JACK_INDEV) += jack_audio.o timefilter.o
OBJS-$(CONFIG_LAVFI_INDEV) += lavfi.o
diff --git a/libavdevice/alldevices.c b/libavdevice/alldevices.c
index 33ce15522a..5178f30861 100644
--- a/libavdevice/alldevices.c
+++ b/libavdevice/alldevices.c
@@ -51,7 +51,7 @@ void avdevice_register_all(void)
REGISTER_OUTDEV (CACA, caca);
REGISTER_INDEV (DSHOW, dshow);
REGISTER_INDEV (DV1394, dv1394);
- REGISTER_INDEV (FBDEV, fbdev);
+ REGISTER_INOUTDEV(FBDEV, fbdev);
REGISTER_INDEV (IEC61883, iec61883);
REGISTER_INDEV (JACK, jack);
REGISTER_INDEV (LAVFI, lavfi);
diff --git a/libavdevice/fbdev_enc.c b/libavdevice/fbdev_enc.c
new file mode 100644
index 0000000000..be9309372e
--- /dev/null
+++ b/libavdevice/fbdev_enc.c
@@ -0,0 +1,253 @@
+/*
+ * Copyright (c) 2013 Lukasz Marek
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <linux/fb.h>
+#include "libavutil/pixdesc.h"
+#include "libavutil/log.h"
+#include "libavutil/mem.h"
+#include "libavutil/opt.h"
+#include "libavformat/avformat.h"
+
+typedef struct {
+ AVClass *class; ///< class for private options
+ int xoffset; ///< x coordinate of top left corner
+ int yoffset; ///< y coordinate of top left corner
+ struct fb_var_screeninfo varinfo; ///< framebuffer variable info
+ struct fb_fix_screeninfo fixinfo; ///< framebuffer fixed info
+ int fd; ///< framebuffer device file descriptor
+ int index; ///< index of a video stream
+ uint8_t *data; ///< framebuffer data
+} FBDevContext;
+
+struct rgb_pixfmt_map_entry {
+ int bits_per_pixel;
+ int red_offset, green_offset, blue_offset, alpha_offset;
+ enum AVPixelFormat pixfmt;
+};
+
+static const struct rgb_pixfmt_map_entry rgb_pixfmt_map[] = {
+ // bpp, red_offset, green_offset, blue_offset, alpha_offset, pixfmt
+ { 32, 0, 8, 16, 24, AV_PIX_FMT_RGBA },
+ { 32, 16, 8, 0, 24, AV_PIX_FMT_BGRA },
+ { 32, 8, 16, 24, 0, AV_PIX_FMT_ARGB },
+ { 32, 3, 2, 8, 0, AV_PIX_FMT_ABGR },
+ { 24, 0, 8, 16, 0, AV_PIX_FMT_RGB24 },
+ { 24, 16, 8, 0, 0, AV_PIX_FMT_BGR24 },
+ { 16, 11, 5, 0, 16, AV_PIX_FMT_RGB565 },
+};
+
+static enum AVPixelFormat get_pixfmt_from_fb_varinfo(struct fb_var_screeninfo *varinfo)
+{
+ int i;
+
+ for (i = 0; i < FF_ARRAY_ELEMS(rgb_pixfmt_map); i++) {
+ const 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 AV_PIX_FMT_NONE;
+}
+
+static av_cold int fbdev_write_header(AVFormatContext *h)
+{
+ FBDevContext *fbdev = h->priv_data;
+ enum AVPixelFormat pix_fmt;
+ AVStream *st = NULL;
+ int ret, flags = O_RDWR;
+
+ for (int i = 0; i < h->nb_streams; i++) {
+ if (h->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+ if (!st) {
+ fbdev->index = i;
+ st = h->streams[i];
+ } else {
+ av_log(h, AV_LOG_WARNING, "More than one video stream found. First one is used.\n");
+ break;
+ }
+ }
+ }
+ if (!st) {
+ av_log(h, AV_LOG_ERROR, "No video stream found.\n");
+ return AVERROR(EINVAL);
+ }
+
+ if ((fbdev->fd = avpriv_open(h->filename, flags)) == -1) {
+ ret = AVERROR(errno);
+ av_log(h, AV_LOG_ERROR,
+ "Could not open framebuffer device '%s': %s\n",
+ h->filename, av_err2str(ret));
+ return ret;
+ }
+
+ if (ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->varinfo) < 0) {
+ ret = AVERROR(errno);
+ av_log(h, AV_LOG_ERROR, "FBIOGET_VSCREENINFO: %s\n", av_err2str(ret));
+ goto fail;
+ }
+
+ if (ioctl(fbdev->fd, FBIOGET_FSCREENINFO, &fbdev->fixinfo) < 0) {
+ ret = AVERROR(errno);
+ av_log(h, AV_LOG_ERROR, "FBIOGET_FSCREENINFO: %s\n", av_err2str(ret));
+ goto fail;
+ }
+
+ pix_fmt = get_pixfmt_from_fb_varinfo(&fbdev->varinfo);
+ if (pix_fmt == AV_PIX_FMT_NONE) {
+ ret = AVERROR(EINVAL);
+ av_log(h, AV_LOG_ERROR, "Framebuffer pixel format not supported.\n");
+ goto fail;
+ }
+
+ fbdev->data = mmap(NULL, fbdev->fixinfo.smem_len, PROT_WRITE, MAP_SHARED, fbdev->fd, 0);
+ if (fbdev->data == MAP_FAILED) {
+ ret = AVERROR(errno);
+ av_log(h, AV_LOG_ERROR, "Error in mmap(): %s\n", av_err2str(ret));
+ goto fail;
+ }
+
+ return 0;
+ fail:
+ close(fbdev->fd);
+ return ret;
+}
+
+static int fbdev_write_packet(AVFormatContext *h, AVPacket *pkt)
+{
+ FBDevContext *fbdev = h->priv_data;
+ uint8_t *pin, *pout;
+ enum AVPixelFormat fb_pix_fmt;
+ int disp_height;
+ int bytes_to_copy;
+ AVCodecContext *codec_ctx = h->streams[fbdev->index]->codec;
+ enum AVPixelFormat video_pix_fmt = codec_ctx->pix_fmt;
+ int video_width = codec_ctx->width;
+ int video_height = codec_ctx->height;
+ int bytes_per_pixel = ((codec_ctx->bits_per_coded_sample + 7) >> 3);
+ int src_line_size = video_width * bytes_per_pixel;
+
+ if (fbdev->index != pkt->stream_index)
+ return 0;
+
+ if (ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->varinfo) < 0)
+ av_log(h, AV_LOG_WARNING,
+ "Error refreshing variable info: %s\n", av_err2str(AVERROR(errno)));
+
+ fb_pix_fmt = get_pixfmt_from_fb_varinfo(&fbdev->varinfo);
+
+ if (fb_pix_fmt != video_pix_fmt) {
+ av_log(h, AV_LOG_ERROR, "Pixel format %s is not supported, use %s\n",
+ av_get_pix_fmt_name(video_pix_fmt), av_get_pix_fmt_name(fb_pix_fmt));
+ return AVERROR(EINVAL);
+ }
+
+ disp_height = FFMIN(fbdev->varinfo.yres, video_height);
+ bytes_to_copy = FFMIN(fbdev->varinfo.xres, video_width) * bytes_per_pixel;
+
+ pin = pkt->data;
+ pout = fbdev->data +
+ bytes_per_pixel * fbdev->varinfo.xoffset +
+ fbdev->varinfo.yoffset * fbdev->fixinfo.line_length;
+
+ if (fbdev->xoffset) {
+ if (fbdev->xoffset < 0) {
+ if (-fbdev->xoffset >= video_width) //nothing to display
+ return 0;
+ bytes_to_copy += fbdev->xoffset * bytes_per_pixel;
+ pin -= fbdev->xoffset * bytes_per_pixel;
+ } else {
+ int diff = (video_width + fbdev->xoffset) - fbdev->varinfo.xres;
+ if (diff > 0) {
+ if (diff >= video_width) //nothing to display
+ return 0;
+ bytes_to_copy -= diff * bytes_per_pixel;
+ }
+ pout += bytes_per_pixel * fbdev->xoffset;
+ }
+ }
+
+ if (fbdev->yoffset) {
+ if (fbdev->yoffset < 0) {
+ if (-fbdev->yoffset >= video_height) //nothing to display
+ return 0;
+ disp_height += fbdev->yoffset;
+ pin -= fbdev->yoffset * src_line_size;
+ } else {
+ int diff = (video_height + fbdev->yoffset) - fbdev->varinfo.yres;
+ if (diff > 0) {
+ if (diff >= video_height) //nothing to display
+ return 0;
+ disp_height -= diff;
+ }
+ pout += fbdev->yoffset * fbdev->fixinfo.line_length;
+ }
+ }
+
+ for (int i = 0; i < disp_height; i++) {
+ memcpy(pout, pin, bytes_to_copy);
+ pout += fbdev->fixinfo.line_length;
+ pin += src_line_size;
+ }
+
+ return 0;
+}
+
+static av_cold int fbdev_write_trailer(AVFormatContext *h)
+{
+ FBDevContext *fbdev = h->priv_data;
+ munmap(fbdev->data, fbdev->fixinfo.smem_len);
+ close(fbdev->fd);
+ return 0;
+}
+
+#define OFFSET(x) offsetof(FBDevContext, x)
+#define ENC AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+ { "xoffset", "set x coordinate of top left corner", OFFSET(xoffset), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, ENC },
+ { "yoffset", "set y coordinate of top left corner", OFFSET(yoffset), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, ENC },
+ { NULL }
+};
+
+static const AVClass fbdev_class = {
+ .class_name = "fbdev outdev",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+AVOutputFormat ff_fbdev_muxer = {
+ .name = "fbdev",
+ .long_name = NULL_IF_CONFIG_SMALL("Linux framebuffer"),
+ .priv_data_size = sizeof(FBDevContext),
+ .audio_codec = AV_CODEC_ID_NONE,
+ .video_codec = AV_CODEC_ID_RAWVIDEO,
+ .write_header = fbdev_write_header,
+ .write_packet = fbdev_write_packet,
+ .write_trailer = fbdev_write_trailer,
+ .flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS,
+ .priv_class = &fbdev_class,
+};
diff --git a/libavdevice/version.h b/libavdevice/version.h
index 5823ab9b36..4f4ec99d94 100644
--- a/libavdevice/version.h
+++ b/libavdevice/version.h
@@ -28,7 +28,7 @@
#include "libavutil/avutil.h"
#define LIBAVDEVICE_VERSION_MAJOR 55
-#define LIBAVDEVICE_VERSION_MINOR 4
+#define LIBAVDEVICE_VERSION_MINOR 5
#define LIBAVDEVICE_VERSION_MICRO 100
#define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \