From 759388aa717ad2749e7024b7b8e32d4641390369 Mon Sep 17 00:00:00 2001 From: Lukasz Marek Date: Wed, 16 Oct 2013 17:18:55 +0200 Subject: [PATCH] lavd: add fbdev output device Signed-off-by: Lukasz Marek Signed-off-by: Stefano Sabatini --- Changelog | 1 + configure | 1 + doc/outdevs.texi | 29 +++++ libavdevice/Makefile | 1 + libavdevice/alldevices.c | 2 +- libavdevice/fbdev_enc.c | 253 +++++++++++++++++++++++++++++++++++++++ libavdevice/version.h | 2 +- 7 files changed, 287 insertions(+), 2 deletions(-) create mode 100644 libavdevice/fbdev_enc.c diff --git a/Changelog b/Changelog index 772d0a969d..45e2aaafed 100644 --- a/Changelog +++ b/Changelog @@ -42,6 +42,7 @@ version - 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 +#include +#include +#include +#include +#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, \