Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * Copyright (c) 2013 Lukasz Marek |
||
| 3 | * |
||
| 4 | * This file is part of FFmpeg. |
||
| 5 | * |
||
| 6 | * FFmpeg is free software; you can redistribute it and/or |
||
| 7 | * modify it under the terms of the GNU Lesser General Public |
||
| 8 | * License as published by the Free Software Foundation; either |
||
| 9 | * version 2.1 of the License, or (at your option) any later version. |
||
| 10 | * |
||
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
||
| 14 | * Lesser General Public License for more details. |
||
| 15 | * |
||
| 16 | * You should have received a copy of the GNU Lesser General Public |
||
| 17 | * License along with FFmpeg; if not, write to the Free Software |
||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
||
| 19 | */ |
||
| 20 | |||
| 21 | #include |
||
| 22 | #include |
||
| 23 | #include |
||
| 24 | #include |
||
| 25 | #include |
||
| 26 | #include "libavutil/pixdesc.h" |
||
| 27 | #include "libavutil/log.h" |
||
| 28 | #include "libavutil/mem.h" |
||
| 29 | #include "libavutil/opt.h" |
||
| 30 | #include "libavformat/avformat.h" |
||
| 31 | #include "fbdev_common.h" |
||
| 32 | |||
| 33 | typedef struct { |
||
| 34 | AVClass *class; ///< class for private options |
||
| 35 | int xoffset; ///< x coordinate of top left corner |
||
| 36 | int yoffset; ///< y coordinate of top left corner |
||
| 37 | struct fb_var_screeninfo varinfo; ///< framebuffer variable info |
||
| 38 | struct fb_fix_screeninfo fixinfo; ///< framebuffer fixed info |
||
| 39 | int fd; ///< framebuffer device file descriptor |
||
| 40 | uint8_t *data; ///< framebuffer data |
||
| 41 | } FBDevContext; |
||
| 42 | |||
| 43 | static av_cold int fbdev_write_header(AVFormatContext *h) |
||
| 44 | { |
||
| 45 | FBDevContext *fbdev = h->priv_data; |
||
| 46 | enum AVPixelFormat pix_fmt; |
||
| 47 | int ret, flags = O_RDWR; |
||
| 48 | |||
| 49 | if (h->nb_streams != 1 || h->streams[0]->codec->codec_type != AVMEDIA_TYPE_VIDEO) { |
||
| 50 | av_log(fbdev, AV_LOG_ERROR, "Only a single video stream is supported.\n"); |
||
| 51 | return AVERROR(EINVAL); |
||
| 52 | } |
||
| 53 | |||
| 54 | if ((fbdev->fd = avpriv_open(h->filename, flags)) == -1) { |
||
| 55 | ret = AVERROR(errno); |
||
| 56 | av_log(h, AV_LOG_ERROR, |
||
| 57 | "Could not open framebuffer device '%s': %s\n", |
||
| 58 | h->filename, av_err2str(ret)); |
||
| 59 | return ret; |
||
| 60 | } |
||
| 61 | |||
| 62 | if (ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->varinfo) < 0) { |
||
| 63 | ret = AVERROR(errno); |
||
| 64 | av_log(h, AV_LOG_ERROR, "FBIOGET_VSCREENINFO: %s\n", av_err2str(ret)); |
||
| 65 | goto fail; |
||
| 66 | } |
||
| 67 | |||
| 68 | if (ioctl(fbdev->fd, FBIOGET_FSCREENINFO, &fbdev->fixinfo) < 0) { |
||
| 69 | ret = AVERROR(errno); |
||
| 70 | av_log(h, AV_LOG_ERROR, "FBIOGET_FSCREENINFO: %s\n", av_err2str(ret)); |
||
| 71 | goto fail; |
||
| 72 | } |
||
| 73 | |||
| 74 | pix_fmt = ff_get_pixfmt_from_fb_varinfo(&fbdev->varinfo); |
||
| 75 | if (pix_fmt == AV_PIX_FMT_NONE) { |
||
| 76 | ret = AVERROR(EINVAL); |
||
| 77 | av_log(h, AV_LOG_ERROR, "Framebuffer pixel format not supported.\n"); |
||
| 78 | goto fail; |
||
| 79 | } |
||
| 80 | |||
| 81 | fbdev->data = mmap(NULL, fbdev->fixinfo.smem_len, PROT_WRITE, MAP_SHARED, fbdev->fd, 0); |
||
| 82 | if (fbdev->data == MAP_FAILED) { |
||
| 83 | ret = AVERROR(errno); |
||
| 84 | av_log(h, AV_LOG_ERROR, "Error in mmap(): %s\n", av_err2str(ret)); |
||
| 85 | goto fail; |
||
| 86 | } |
||
| 87 | |||
| 88 | return 0; |
||
| 89 | fail: |
||
| 90 | close(fbdev->fd); |
||
| 91 | return ret; |
||
| 92 | } |
||
| 93 | |||
| 94 | static int fbdev_write_packet(AVFormatContext *h, AVPacket *pkt) |
||
| 95 | { |
||
| 96 | FBDevContext *fbdev = h->priv_data; |
||
| 97 | uint8_t *pin, *pout; |
||
| 98 | enum AVPixelFormat fb_pix_fmt; |
||
| 99 | int disp_height; |
||
| 100 | int bytes_to_copy; |
||
| 101 | AVCodecContext *codec_ctx = h->streams[0]->codec; |
||
| 102 | enum AVPixelFormat video_pix_fmt = codec_ctx->pix_fmt; |
||
| 103 | int video_width = codec_ctx->width; |
||
| 104 | int video_height = codec_ctx->height; |
||
| 105 | int bytes_per_pixel = ((codec_ctx->bits_per_coded_sample + 7) >> 3); |
||
| 106 | int src_line_size = video_width * bytes_per_pixel; |
||
| 107 | int i; |
||
| 108 | |||
| 109 | if (ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->varinfo) < 0) |
||
| 110 | av_log(h, AV_LOG_WARNING, |
||
| 111 | "Error refreshing variable info: %s\n", av_err2str(AVERROR(errno))); |
||
| 112 | |||
| 113 | fb_pix_fmt = ff_get_pixfmt_from_fb_varinfo(&fbdev->varinfo); |
||
| 114 | |||
| 115 | if (fb_pix_fmt != video_pix_fmt) { |
||
| 116 | av_log(h, AV_LOG_ERROR, "Pixel format %s is not supported, use %s\n", |
||
| 117 | av_get_pix_fmt_name(video_pix_fmt), av_get_pix_fmt_name(fb_pix_fmt)); |
||
| 118 | return AVERROR(EINVAL); |
||
| 119 | } |
||
| 120 | |||
| 121 | disp_height = FFMIN(fbdev->varinfo.yres, video_height); |
||
| 122 | bytes_to_copy = FFMIN(fbdev->varinfo.xres, video_width) * bytes_per_pixel; |
||
| 123 | |||
| 124 | pin = pkt->data; |
||
| 125 | pout = fbdev->data + |
||
| 126 | bytes_per_pixel * fbdev->varinfo.xoffset + |
||
| 127 | fbdev->varinfo.yoffset * fbdev->fixinfo.line_length; |
||
| 128 | |||
| 129 | if (fbdev->xoffset) { |
||
| 130 | if (fbdev->xoffset < 0) { |
||
| 131 | if (-fbdev->xoffset >= video_width) //nothing to display |
||
| 132 | return 0; |
||
| 133 | bytes_to_copy += fbdev->xoffset * bytes_per_pixel; |
||
| 134 | pin -= fbdev->xoffset * bytes_per_pixel; |
||
| 135 | } else { |
||
| 136 | int diff = (video_width + fbdev->xoffset) - fbdev->varinfo.xres; |
||
| 137 | if (diff > 0) { |
||
| 138 | if (diff >= video_width) //nothing to display |
||
| 139 | return 0; |
||
| 140 | bytes_to_copy -= diff * bytes_per_pixel; |
||
| 141 | } |
||
| 142 | pout += bytes_per_pixel * fbdev->xoffset; |
||
| 143 | } |
||
| 144 | } |
||
| 145 | |||
| 146 | if (fbdev->yoffset) { |
||
| 147 | if (fbdev->yoffset < 0) { |
||
| 148 | if (-fbdev->yoffset >= video_height) //nothing to display |
||
| 149 | return 0; |
||
| 150 | disp_height += fbdev->yoffset; |
||
| 151 | pin -= fbdev->yoffset * src_line_size; |
||
| 152 | } else { |
||
| 153 | int diff = (video_height + fbdev->yoffset) - fbdev->varinfo.yres; |
||
| 154 | if (diff > 0) { |
||
| 155 | if (diff >= video_height) //nothing to display |
||
| 156 | return 0; |
||
| 157 | disp_height -= diff; |
||
| 158 | } |
||
| 159 | pout += fbdev->yoffset * fbdev->fixinfo.line_length; |
||
| 160 | } |
||
| 161 | } |
||
| 162 | |||
| 163 | for (i = 0; i < disp_height; i++) { |
||
| 164 | memcpy(pout, pin, bytes_to_copy); |
||
| 165 | pout += fbdev->fixinfo.line_length; |
||
| 166 | pin += src_line_size; |
||
| 167 | } |
||
| 168 | |||
| 169 | return 0; |
||
| 170 | } |
||
| 171 | |||
| 172 | static av_cold int fbdev_write_trailer(AVFormatContext *h) |
||
| 173 | { |
||
| 174 | FBDevContext *fbdev = h->priv_data; |
||
| 175 | munmap(fbdev->data, fbdev->fixinfo.smem_len); |
||
| 176 | close(fbdev->fd); |
||
| 177 | return 0; |
||
| 178 | } |
||
| 179 | |||
| 180 | #define OFFSET(x) offsetof(FBDevContext, x) |
||
| 181 | #define ENC AV_OPT_FLAG_ENCODING_PARAM |
||
| 182 | static const AVOption options[] = { |
||
| 183 | { "xoffset", "set x coordinate of top left corner", OFFSET(xoffset), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, ENC }, |
||
| 184 | { "yoffset", "set y coordinate of top left corner", OFFSET(yoffset), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, ENC }, |
||
| 185 | { NULL } |
||
| 186 | }; |
||
| 187 | |||
| 188 | static const AVClass fbdev_class = { |
||
| 189 | .class_name = "fbdev outdev", |
||
| 190 | .item_name = av_default_item_name, |
||
| 191 | .option = options, |
||
| 192 | .version = LIBAVUTIL_VERSION_INT, |
||
| 193 | }; |
||
| 194 | |||
| 195 | AVOutputFormat ff_fbdev_muxer = { |
||
| 196 | .name = "fbdev", |
||
| 197 | .long_name = NULL_IF_CONFIG_SMALL("Linux framebuffer"), |
||
| 198 | .priv_data_size = sizeof(FBDevContext), |
||
| 199 | .audio_codec = AV_CODEC_ID_NONE, |
||
| 200 | .video_codec = AV_CODEC_ID_RAWVIDEO, |
||
| 201 | .write_header = fbdev_write_header, |
||
| 202 | .write_packet = fbdev_write_packet, |
||
| 203 | .write_trailer = fbdev_write_trailer, |
||
| 204 | .flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS, |
||
| 205 | .priv_class = &fbdev_class, |
||
| 206 | }; |