diff options
Diffstat (limited to 'libavdevice/fbdev.c')
-rw-r--r-- | libavdevice/fbdev.c | 276 |
1 files changed, 0 insertions, 276 deletions
diff --git a/libavdevice/fbdev.c b/libavdevice/fbdev.c deleted file mode 100644 index a83b4f1..0000000 --- a/libavdevice/fbdev.c +++ /dev/null @@ -1,276 +0,0 @@ -/* - * 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 http://linux-fbdev.sourceforge.net/ - */ - -#include <unistd.h> -#include <fcntl.h> -#include <sys/ioctl.h> -#include <sys/mman.h> -#include <time.h> -#include <linux/fb.h> - -#include "libavutil/internal.h" -#include "libavutil/log.h" -#include "libavutil/mem.h" -#include "libavutil/opt.h" -#include "libavutil/time.h" -#include "libavutil/parseutils.h" -#include "libavutil/pixdesc.h" -#include "libavformat/avformat.h" -#include "libavformat/internal.h" - -struct rgb_pixfmt_map_entry { - int bits_per_pixel; - int red_offset, green_offset, blue_offset, alpha_offset; - enum AVPixelFormat 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, 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 }, -}; - -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++) { - 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; -} - -typedef struct FBDevContext { - AVClass *class; ///< class for private options - int frame_size; ///< size in bytes of a grabbed frame - AVRational framerate_q; ///< 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 - int width, height; ///< 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; - -static av_cold int fbdev_read_header(AVFormatContext *avctx) -{ - FBDevContext *fbdev = avctx->priv_data; - AVStream *st = NULL; - enum AVPixelFormat pix_fmt; - int ret, flags = O_RDONLY; - char errbuf[128]; - - ret = av_parse_video_rate(&fbdev->framerate_q, fbdev->framerate); - if (ret < 0) { - av_log(avctx, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", fbdev->framerate); - return ret; - } - - if (!(st = avformat_new_stream(avctx, NULL))) - return AVERROR(ENOMEM); - avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in microseconds */ - - /* NONBLOCK is ignored by the fbdev driver, only set for consistency */ - if (avctx->flags & AVFMT_FLAG_NONBLOCK) - flags |= O_NONBLOCK; - - if ((fbdev->fd = avpriv_open(avctx->filename, flags)) == -1) { - ret = AVERROR(errno); - av_strerror(ret, errbuf, sizeof(errbuf)); - av_log(avctx, AV_LOG_ERROR, - "Could not open framebuffer device '%s': %s\n", - avctx->filename, errbuf); - return ret; - } - - if (ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->varinfo) < 0) { - ret = AVERROR(errno); - av_strerror(ret, errbuf, sizeof(errbuf)); - av_log(avctx, AV_LOG_ERROR, - "FBIOGET_VSCREENINFO: %s\n", errbuf); - goto fail; - } - - if (ioctl(fbdev->fd, FBIOGET_FSCREENINFO, &fbdev->fixinfo) < 0) { - ret = AVERROR(errno); - av_strerror(ret, errbuf, sizeof(errbuf)); - av_log(avctx, AV_LOG_ERROR, - "FBIOGET_FSCREENINFO: %s\n", errbuf); - goto fail; - } - - pix_fmt = get_pixfmt_from_fb_varinfo(&fbdev->varinfo); - if (pix_fmt == AV_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->height = 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->height; - 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_strerror(ret, errbuf, sizeof(errbuf)); - av_log(avctx, AV_LOG_ERROR, "Error in mmap(): %s\n", errbuf); - goto fail; - } - - st->codec->codec_type = AVMEDIA_TYPE_VIDEO; - st->codec->codec_id = AV_CODEC_ID_RAWVIDEO; - st->codec->width = fbdev->width; - st->codec->height = fbdev->height; - st->codec->pix_fmt = pix_fmt; - st->codec->time_base = (AVRational){fbdev->framerate_q.den, fbdev->framerate_q.num}; - st->codec->bit_rate = - fbdev->width * fbdev->height * fbdev->bytes_per_pixel * av_q2d(fbdev->framerate_q) * 8; - - av_log(avctx, AV_LOG_INFO, - "w:%d h:%d bpp:%d pixfmt:%s fps:%d/%d bit_rate:%d\n", - fbdev->width, fbdev->height, fbdev->varinfo.bits_per_pixel, - av_get_pix_fmt_name(pix_fmt), - fbdev->framerate_q.num, fbdev->framerate_q.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->framerate_q); - - 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) { - char errbuf[128]; - av_strerror(AVERROR(errno), errbuf, sizeof(errbuf)); - av_log(avctx, AV_LOG_WARNING, - "Error refreshing variable info: %s\n", errbuf); - } - - 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->height; i++) { - memcpy(pout, pin, fbdev->frame_linesize); - pin += fbdev->fixinfo.line_length; - pout += fbdev->frame_linesize; - } - - return fbdev->frame_size; -} - -static av_cold int fbdev_read_close(AVFormatContext *avctx) -{ - FBDevContext *fbdev = avctx->priv_data; - - munmap(fbdev->data, fbdev->frame_size); - close(fbdev->fd); - - return 0; -} - -#define OFFSET(x) offsetof(FBDevContext, x) -#define DEC AV_OPT_FLAG_DECODING_PARAM -static const AVOption options[] = { - { "framerate","", OFFSET(framerate), AV_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"), - .priv_data_size = sizeof(FBDevContext), - .read_header = fbdev_read_header, - .read_packet = fbdev_read_packet, - .read_close = fbdev_read_close, - .flags = AVFMT_NOFILE, - .priv_class = &fbdev_class, -}; |