diff options
author | Anton Khirnov <anton@khirnov.net> | 2012-01-12 14:22:59 +0400 |
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committer | Anton Khirnov <anton@khirnov.net> | 2012-01-24 21:04:19 +0400 |
commit | 941e9f22386e923183dc4c5392d0ef2a85b68d51 (patch) | |
tree | 95befca94e83d76bbf1f6cd93c1ef91b402b3e05 /libavdevice/v4l.c | |
parent | d1ad6bdb6b578919f706694656a071d7ff7d9d84 (diff) |
lavd: remove deprecated v4l grab device.
Diffstat (limited to 'libavdevice/v4l.c')
-rw-r--r-- | libavdevice/v4l.c | 366 |
1 files changed, 0 insertions, 366 deletions
diff --git a/libavdevice/v4l.c b/libavdevice/v4l.c deleted file mode 100644 index bdfee2df4e..0000000000 --- a/libavdevice/v4l.c +++ /dev/null @@ -1,366 +0,0 @@ -/* - * Linux video grab interface - * Copyright (c) 2000,2001 Fabrice Bellard - * - * 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 - */ - -#include "avdevice.h" - -#if FF_API_V4L - -#undef __STRICT_ANSI__ //workaround due to broken kernel headers -#include "config.h" -#include "libavutil/rational.h" -#include "libavutil/imgutils.h" -#include "libavutil/log.h" -#include "libavutil/opt.h" -#include "libavformat/avformat.h" -#include "libavformat/internal.h" -#include "libavcodec/dsputil.h" -#include <unistd.h> -#include <fcntl.h> -#include <sys/ioctl.h> -#include <sys/mman.h> -#include <sys/time.h> -#define _LINUX_TIME_H 1 -#include <linux/videodev.h> -#include <time.h> - -typedef struct { - AVClass *class; - int fd; - int frame_format; /* see VIDEO_PALETTE_xxx */ - int use_mmap; - AVRational time_base; - int64_t time_frame; - int frame_size; - struct video_capability video_cap; - struct video_audio audio_saved; - struct video_window video_win; - uint8_t *video_buf; - struct video_mbuf gb_buffers; - struct video_mmap gb_buf; - int gb_frame; - int standard; -} VideoData; - -static const struct { - int palette; - int depth; - enum PixelFormat pix_fmt; -} video_formats [] = { - {.palette = VIDEO_PALETTE_YUV420P, .depth = 12, .pix_fmt = PIX_FMT_YUV420P }, - {.palette = VIDEO_PALETTE_YUV422, .depth = 16, .pix_fmt = PIX_FMT_YUYV422 }, - {.palette = VIDEO_PALETTE_UYVY, .depth = 16, .pix_fmt = PIX_FMT_UYVY422 }, - {.palette = VIDEO_PALETTE_YUYV, .depth = 16, .pix_fmt = PIX_FMT_YUYV422 }, - /* NOTE: v4l uses BGR24, not RGB24 */ - {.palette = VIDEO_PALETTE_RGB24, .depth = 24, .pix_fmt = PIX_FMT_BGR24 }, - {.palette = VIDEO_PALETTE_RGB565, .depth = 16, .pix_fmt = PIX_FMT_BGR565 }, - {.palette = VIDEO_PALETTE_GREY, .depth = 8, .pix_fmt = PIX_FMT_GRAY8 }, -}; - - -static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap) -{ - VideoData *s = s1->priv_data; - AVStream *st; - int video_fd; - int desired_palette, desired_depth; - struct video_tuner tuner; - struct video_audio audio; - struct video_picture pict; - int j; - int vformat_num = FF_ARRAY_ELEMS(video_formats); - - av_log(s1, AV_LOG_WARNING, "V4L input device is deprecated and will be removed in the next release."); - - if (ap->time_base.den <= 0) { - av_log(s1, AV_LOG_ERROR, "Wrong time base (%d)\n", ap->time_base.den); - return -1; - } - s->time_base = ap->time_base; - - s->video_win.width = ap->width; - s->video_win.height = ap->height; - - st = avformat_new_stream(s1, NULL); - if (!st) - return AVERROR(ENOMEM); - avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ - - video_fd = open(s1->filename, O_RDWR); - if (video_fd < 0) { - av_log(s1, AV_LOG_ERROR, "%s: %s\n", s1->filename, strerror(errno)); - goto fail; - } - - if (ioctl(video_fd, VIDIOCGCAP, &s->video_cap) < 0) { - av_log(s1, AV_LOG_ERROR, "VIDIOCGCAP: %s\n", strerror(errno)); - goto fail; - } - - if (!(s->video_cap.type & VID_TYPE_CAPTURE)) { - av_log(s1, AV_LOG_ERROR, "Fatal: grab device does not handle capture\n"); - goto fail; - } - - /* no values set, autodetect them */ - if (s->video_win.width <= 0 || s->video_win.height <= 0) { - if (ioctl(video_fd, VIDIOCGWIN, &s->video_win, sizeof(s->video_win)) < 0) { - av_log(s1, AV_LOG_ERROR, "VIDIOCGWIN: %s\n", strerror(errno)); - goto fail; - } - } - - if(av_image_check_size(s->video_win.width, s->video_win.height, 0, s1) < 0) - return -1; - - desired_palette = -1; - desired_depth = -1; - for (j = 0; j < vformat_num; j++) { - if (ap->pix_fmt == video_formats[j].pix_fmt) { - desired_palette = video_formats[j].palette; - desired_depth = video_formats[j].depth; - break; - } - } - - /* set tv standard */ - if (!ioctl(video_fd, VIDIOCGTUNER, &tuner)) { - tuner.mode = s->standard; - ioctl(video_fd, VIDIOCSTUNER, &tuner); - } - - /* unmute audio */ - audio.audio = 0; - ioctl(video_fd, VIDIOCGAUDIO, &audio); - memcpy(&s->audio_saved, &audio, sizeof(audio)); - audio.flags &= ~VIDEO_AUDIO_MUTE; - ioctl(video_fd, VIDIOCSAUDIO, &audio); - - ioctl(video_fd, VIDIOCGPICT, &pict); - av_dlog(s1, "v4l: colour=%d hue=%d brightness=%d constrast=%d whiteness=%d\n", - pict.colour, pict.hue, pict.brightness, pict.contrast, pict.whiteness); - /* try to choose a suitable video format */ - pict.palette = desired_palette; - pict.depth= desired_depth; - if (desired_palette == -1 || ioctl(video_fd, VIDIOCSPICT, &pict) < 0) { - for (j = 0; j < vformat_num; j++) { - pict.palette = video_formats[j].palette; - pict.depth = video_formats[j].depth; - if (-1 != ioctl(video_fd, VIDIOCSPICT, &pict)) - break; - } - if (j >= vformat_num) - goto fail1; - } - - if (ioctl(video_fd, VIDIOCGMBUF, &s->gb_buffers) < 0) { - /* try to use read based access */ - int val; - - s->video_win.x = 0; - s->video_win.y = 0; - s->video_win.chromakey = -1; - s->video_win.flags = 0; - - if (ioctl(video_fd, VIDIOCSWIN, s->video_win) < 0) { - av_log(s1, AV_LOG_ERROR, "VIDIOCSWIN: %s\n", strerror(errno)); - goto fail; - } - - s->frame_format = pict.palette; - - val = 1; - if (ioctl(video_fd, VIDIOCCAPTURE, &val) < 0) { - av_log(s1, AV_LOG_ERROR, "VIDIOCCAPTURE: %s\n", strerror(errno)); - goto fail; - } - - s->time_frame = av_gettime() * s->time_base.den / s->time_base.num; - s->use_mmap = 0; - } else { - s->video_buf = mmap(0, s->gb_buffers.size, PROT_READ|PROT_WRITE, MAP_SHARED, video_fd, 0); - if ((unsigned char*)-1 == s->video_buf) { - s->video_buf = mmap(0, s->gb_buffers.size, PROT_READ|PROT_WRITE, MAP_PRIVATE, video_fd, 0); - if ((unsigned char*)-1 == s->video_buf) { - av_log(s1, AV_LOG_ERROR, "mmap: %s\n", strerror(errno)); - goto fail; - } - } - s->gb_frame = 0; - s->time_frame = av_gettime() * s->time_base.den / s->time_base.num; - - /* start to grab the first frame */ - s->gb_buf.frame = s->gb_frame % s->gb_buffers.frames; - s->gb_buf.height = s->video_win.height; - s->gb_buf.width = s->video_win.width; - s->gb_buf.format = pict.palette; - - if (ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf) < 0) { - if (errno != EAGAIN) { - fail1: - av_log(s1, AV_LOG_ERROR, "VIDIOCMCAPTURE: %s\n", strerror(errno)); - } else { - av_log(s1, AV_LOG_ERROR, "Fatal: grab device does not receive any video signal\n"); - } - goto fail; - } - for (j = 1; j < s->gb_buffers.frames; j++) { - s->gb_buf.frame = j; - ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf); - } - s->frame_format = s->gb_buf.format; - s->use_mmap = 1; - } - - for (j = 0; j < vformat_num; j++) { - if (s->frame_format == video_formats[j].palette) { - s->frame_size = s->video_win.width * s->video_win.height * video_formats[j].depth / 8; - st->codec->pix_fmt = video_formats[j].pix_fmt; - break; - } - } - - if (j >= vformat_num) - goto fail; - - s->fd = video_fd; - - st->codec->codec_type = AVMEDIA_TYPE_VIDEO; - st->codec->codec_id = CODEC_ID_RAWVIDEO; - st->codec->width = s->video_win.width; - st->codec->height = s->video_win.height; - st->codec->time_base = s->time_base; - st->codec->bit_rate = s->frame_size * 1/av_q2d(st->codec->time_base) * 8; - - return 0; - fail: - if (video_fd >= 0) - close(video_fd); - return AVERROR(EIO); -} - -static int v4l_mm_read_picture(VideoData *s, uint8_t *buf) -{ - uint8_t *ptr; - - while (ioctl(s->fd, VIDIOCSYNC, &s->gb_frame) < 0 && - (errno == EAGAIN || errno == EINTR)); - - ptr = s->video_buf + s->gb_buffers.offsets[s->gb_frame]; - memcpy(buf, ptr, s->frame_size); - - /* Setup to capture the next frame */ - s->gb_buf.frame = s->gb_frame; - if (ioctl(s->fd, VIDIOCMCAPTURE, &s->gb_buf) < 0) { - if (errno == EAGAIN) - av_log(NULL, AV_LOG_ERROR, "Cannot Sync\n"); - else - av_log(NULL, AV_LOG_ERROR, "VIDIOCMCAPTURE: %s\n", strerror(errno)); - return AVERROR(EIO); - } - - /* This is now the grabbing frame */ - s->gb_frame = (s->gb_frame + 1) % s->gb_buffers.frames; - - return s->frame_size; -} - -static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt) -{ - VideoData *s = s1->priv_data; - int64_t curtime, delay; - struct timespec ts; - - /* Calculate the time of the next frame */ - s->time_frame += INT64_C(1000000); - - /* wait based on the frame rate */ - for(;;) { - curtime = av_gettime(); - delay = s->time_frame * s->time_base.num / s->time_base.den - curtime; - if (delay <= 0) { - if (delay < INT64_C(-1000000) * s->time_base.num / s->time_base.den) { - /* printf("grabbing is %d frames late (dropping)\n", (int) -(delay / 16666)); */ - s->time_frame += INT64_C(1000000); - } - break; - } - ts.tv_sec = delay / 1000000; - ts.tv_nsec = (delay % 1000000) * 1000; - nanosleep(&ts, NULL); - } - - if (av_new_packet(pkt, s->frame_size) < 0) - return AVERROR(EIO); - - pkt->pts = curtime; - - /* read one frame */ - if (s->use_mmap) { - return v4l_mm_read_picture(s, pkt->data); - } else { - if (read(s->fd, pkt->data, pkt->size) != pkt->size) - return AVERROR(EIO); - return s->frame_size; - } -} - -static int grab_read_close(AVFormatContext *s1) -{ - VideoData *s = s1->priv_data; - - if (s->use_mmap) - munmap(s->video_buf, s->gb_buffers.size); - - /* mute audio. we must force it because the BTTV driver does not - return its state correctly */ - s->audio_saved.flags |= VIDEO_AUDIO_MUTE; - ioctl(s->fd, VIDIOCSAUDIO, &s->audio_saved); - - close(s->fd); - return 0; -} - -static const AVOption options[] = { - { "standard", "", offsetof(VideoData, standard), AV_OPT_TYPE_INT, {.dbl = VIDEO_MODE_NTSC}, VIDEO_MODE_PAL, VIDEO_MODE_NTSC, AV_OPT_FLAG_DECODING_PARAM, "standard" }, - { "PAL", "", 0, AV_OPT_TYPE_CONST, {.dbl = VIDEO_MODE_PAL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" }, - { "SECAM", "", 0, AV_OPT_TYPE_CONST, {.dbl = VIDEO_MODE_SECAM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" }, - { "NTSC", "", 0, AV_OPT_TYPE_CONST, {.dbl = VIDEO_MODE_NTSC}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" }, - { NULL }, -}; - -static const AVClass v4l_class = { - .class_name = "V4L indev", - .item_name = av_default_item_name, - .option = options, - .version = LIBAVUTIL_VERSION_INT, -}; - -AVInputFormat ff_v4l_demuxer = { - .name = "video4linux", - .long_name = NULL_IF_CONFIG_SMALL("Video4Linux device grab"), - .priv_data_size = sizeof(VideoData), - .read_header = grab_read_header, - .read_packet = grab_read_packet, - .read_close = grab_read_close, - .flags = AVFMT_NOFILE, - .priv_class = &v4l_class, -}; -#endif /* FF_API_V4L */ |