diff --git a/libavdevice/KVMFR.h b/libavdevice/KVMFR.h new file mode 100644 index 0000000000..c4c3d19495 --- /dev/null +++ b/libavdevice/KVMFR.h "no new code just copy KVMFR.h from looking glass project" diff --git a/libavdevice/Makefile b/libavdevice/Makefile index 6ea62b914e..cffd1b8e79 100644 --- a/libavdevice/Makefile +++ b/libavdevice/Makefile @@ -31,6 +31,7 @@ OBJS-$(CONFIG_GDIGRAB_INDEV) += gdigrab.o OBJS-$(CONFIG_IEC61883_INDEV) += iec61883.o OBJS-$(CONFIG_JACK_INDEV) += jack.o timefilter.o OBJS-$(CONFIG_KMSGRAB_INDEV) += kmsgrab.o +OBJS-$(CONFIG_FBDEV_INDEV) += kvmfr_dec.o OBJS-$(CONFIG_LAVFI_INDEV) += lavfi.o OBJS-$(CONFIG_OPENAL_INDEV) += openal-dec.o OBJS-$(CONFIG_OPENGL_OUTDEV) += opengl_enc.o diff --git a/libavdevice/alldevices.c b/libavdevice/alldevices.c index 8633433254..61fe350997 100644 --- a/libavdevice/alldevices.c +++ b/libavdevice/alldevices.c @@ -39,6 +39,7 @@ extern AVInputFormat ff_gdigrab_demuxer; extern AVInputFormat ff_iec61883_demuxer; extern AVInputFormat ff_jack_demuxer; extern AVInputFormat ff_kmsgrab_demuxer; +extern AVInputFormat ff_kvmfr_demuxer; extern AVInputFormat ff_lavfi_demuxer; extern AVInputFormat ff_openal_demuxer; extern AVOutputFormat ff_opengl_muxer; diff --git a/libavdevice/kvmfr_dec.c b/libavdevice/kvmfr_dec.c new file mode 100644 index 0000000000..aa0e5097cb --- /dev/null +++ b/libavdevice/kvmfr_dec.c @@ -0,0 +1,221 @@ +/* + * Copyright (c) 2011 Stefano Sabatini + * Copyright (c) 2009 Giliard B. de Freitas + * Copyright (C) 2002 Gunnar Monell + * + * 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 + */ + +/** + * @file + * Looking-Glass framebuffer input device, + * Mirrors some code from fbdev_dec.c. + */ + +#include +#include +#include +#include +#include +#include + +#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/internal.h" +#include "avdevice.h" +#include "KVMFR.h" + +typedef struct KVMFRContext { + AVClass *class; ///< class for private options + int frame_size; ///< size in bytes of a grabbed frame + AVRational framerate_q; ///< framerate + int64_t time_frame; ///< time for the next frame to output (in 1/1000000 units) + + int shmFD; // KVMFR framebuffer device file + struct KVMFRHeader * shm; + int shmFD_size; ///< 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; + + uint8_t *data; ///< framebuffer data + +} KVMFRContext; + +static av_cold int kvmfr_read_header(AVFormatContext *avctx) +{ + KVMFRContext *kvmfr = avctx->priv_data; + AVStream *st = NULL; + enum AVPixelFormat pix_fmt; + int ret, bpp, flags = O_RDWR; + const char* shared_mem; + struct stat file_stat; + int bpp_map[6] = {0, 32, 32, 32, 12, 0}; + enum AVPixelFormat pix_map[6] = { + AV_PIX_FMT_NONE, AV_PIX_FMT_BGRA, AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE, AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE}; + + + if (!(st = avformat_new_stream(avctx, NULL))) + return AVERROR(ENOMEM); + avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in microseconds */ + + if (avctx->url[0]) + shared_mem = avctx->url; + else + shared_mem = "/dev/shm/looking-glass"; + + if ((kvmfr->shmFD = avpriv_open(shared_mem, flags)) == -1) { + ret = AVERROR(errno); + av_log(avctx, AV_LOG_ERROR, + "Could not open looking-glass file '%s': %s\n", + shared_mem, av_err2str(ret)); + return ret; + } + + stat(shared_mem, &file_stat); + kvmfr->shmFD_size = file_stat.st_size; + kvmfr->shm = (struct KVMFRHeader *)mmap(0, kvmfr->shmFD_size, PROT_READ | PROT_WRITE, MAP_SHARED, kvmfr->shmFD, 0); + if (kvmfr->shm == MAP_FAILED) { + ret = AVERROR(errno); + av_log(avctx, AV_LOG_ERROR, "Error in mmap(): %s\n", av_err2str(ret)); + goto fail; + } + + __sync_or_and_fetch(&kvmfr->shm->flags, KVMFR_HEADER_FLAG_RESTART); + + pix_fmt = pix_map[kvmfr->shm->frame.type]; + if (pix_fmt == AV_PIX_FMT_NONE) { + ret = AVERROR(EINVAL); + av_log(avctx, AV_LOG_ERROR, + "Framebuffer pixel format not supported.\n"); + munmap(kvmfr->shm, kvmfr->shmFD_size); + goto fail; + } + bpp = bpp_map[kvmfr->shm->frame.type]; + + kvmfr->width = kvmfr->shm->frame.width; + kvmfr->height = kvmfr->shm->frame.height; + kvmfr->bytes_per_pixel = (bpp + 7) >> 3; + kvmfr->frame_linesize = kvmfr->width * kvmfr->bytes_per_pixel; + kvmfr->frame_size = kvmfr->frame_linesize * kvmfr->height; + kvmfr->time_frame = AV_NOPTS_VALUE; + kvmfr->data = (uint8_t *)kvmfr->shm + kvmfr->shm->frame.dataPos; + + st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; + st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO; + st->codecpar->width = kvmfr->width; + st->codecpar->height = kvmfr->height; + st->codecpar->format = pix_fmt; + st->avg_frame_rate = kvmfr->framerate_q; + st->codecpar->bit_rate = kvmfr->frame_size * av_q2d(kvmfr->framerate_q) * 8; + + av_log(avctx, AV_LOG_INFO, + "w:%d h:%d bpp:%d pixfmt:%s fps:%d/%d bit_rate:%"PRId64"\n", + kvmfr->width, kvmfr->height, bpp, + av_get_pix_fmt_name(pix_fmt), + kvmfr->framerate_q.num, kvmfr->framerate_q.den, + st->codecpar->bit_rate); + return 0; + +fail: + close(kvmfr->shmFD); + return ret; +} + +static int kvmfr_read_packet(AVFormatContext *avctx, AVPacket *pkt) +{ + KVMFRContext *kvmfr = avctx->priv_data; + int64_t curtime, delay; + struct timespec ts; + int ret; + + if (kvmfr->time_frame == AV_NOPTS_VALUE) + kvmfr->time_frame = av_gettime(); + + /* wait based on the frame rate */ + while (1) { + curtime = av_gettime(); + delay = kvmfr->time_frame - curtime; + av_log(avctx, AV_LOG_TRACE, + "time_frame:%"PRId64" curtime:%"PRId64" delay:%"PRId64"\n", + kvmfr->time_frame, curtime, delay); + if (delay <= 0) { + kvmfr->time_frame += INT64_C(1000000) / av_q2d(kvmfr->framerate_q); + break; + } + 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); + } + + if ((ret = av_new_packet(pkt, kvmfr->frame_size)) < 0) + return ret; + + // refresh where KVMFR framebuffer pointer due to double buffer + kvmfr->data = (uint8_t *)kvmfr->shm + kvmfr->shm->frame.dataPos; + + __sync_and_and_fetch(&kvmfr->shm->frame.flags, ~KVMFR_FRAME_FLAG_UPDATE); + + pkt->pts = curtime; + + memcpy(pkt->data, kvmfr->data, kvmfr->frame_size); + + return kvmfr->frame_size; +} + +static av_cold int kvmfr_read_close(AVFormatContext *avctx) +{ + KVMFRContext *kvmfr = avctx->priv_data; + + munmap(kvmfr->shm, kvmfr->shmFD_size); + close(kvmfr->shmFD); + + return 0; +} + +#define OFFSET(x) offsetof(KVMFRContext, x) +#define DEC AV_OPT_FLAG_DECODING_PARAM +static const AVOption options[] = { + { "framerate","", OFFSET(framerate_q), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC }, + { NULL }, +}; + +static const AVClass kvmfr_class = { + .class_name = "kvmfr indev", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, + .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT, +}; + +AVInputFormat ff_kvmfr_demuxer = { + .name = "kvmfr", + .long_name = NULL_IF_CONFIG_SMALL("KVM frame Relay"), + .priv_data_size = sizeof(KVMFRContext), + .read_header = kvmfr_read_header, + .read_packet = kvmfr_read_packet, + .read_close = kvmfr_read_close, + .flags = AVFMT_NOFILE, + .priv_class = &kvmfr_class, +};