diff options
Diffstat (limited to 'libavdevice/xv.c')
| -rw-r--r-- | libavdevice/xv.c | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/libavdevice/xv.c b/libavdevice/xv.c new file mode 100644 index 0000000000..2948e6d9b7 --- /dev/null +++ b/libavdevice/xv.c @@ -0,0 +1,280 @@ +/* + * Copyright (c) 2013 Jeff Moguillansky + * + * 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 + * XVideo output device + * + * TODO: + * - add support to more formats + * - add support to window id specification + */ + +#include <X11/Xlib.h> +#include <X11/extensions/Xv.h> +#include <X11/extensions/XShm.h> +#include <X11/extensions/Xvlib.h> +#include <sys/shm.h> + +#include "libavutil/opt.h" +#include "libavutil/pixdesc.h" +#include "libavutil/imgutils.h" +#include "libavformat/internal.h" +#include "avdevice.h" + +typedef struct { + AVClass *class; + GC gc; + + Window window; + char *window_title; + int window_width, window_height; + int window_x, window_y; + + Display* display; + char *display_name; + + XvImage* yuv_image; + enum AVPixelFormat image_format; + int image_width, image_height; + XShmSegmentInfo yuv_shminfo; + int xv_port; +} XVContext; + +typedef struct XVTagFormatMap +{ + int tag; + enum AVPixelFormat format; +} XVTagFormatMap; + +static XVTagFormatMap tag_codec_map[] = { + { MKTAG('I','4','2','0'), AV_PIX_FMT_YUV420P }, + { MKTAG('U','Y','V','Y'), AV_PIX_FMT_UYVY422 }, + { MKTAG('Y','U','Y','2'), AV_PIX_FMT_YUYV422 }, + { 0, AV_PIX_FMT_NONE } +}; + +static int xv_get_tag_from_format(enum AVPixelFormat format) +{ + XVTagFormatMap *m = tag_codec_map; + int i; + for (i = 0; m->tag; m = &tag_codec_map[++i]) { + if (m->format == format) + return m->tag; + } + return 0; +} + +static int xv_write_trailer(AVFormatContext *s) +{ + XVContext *xv = s->priv_data; + if (xv->display) { + XShmDetach(xv->display, &xv->yuv_shminfo); + if (xv->yuv_image) + shmdt(xv->yuv_image->data); + XFree(xv->yuv_image); + if (xv->gc) + XFreeGC(xv->display, xv->gc); + XCloseDisplay(xv->display); + } + return 0; +} + +static int xv_write_header(AVFormatContext *s) +{ + XVContext *xv = s->priv_data; + unsigned int num_adaptors; + XvAdaptorInfo *ai; + XvImageFormatValues *fv; + int num_formats = 0, j, tag, ret; + AVCodecContext *encctx = s->streams[0]->codec; + + if ( s->nb_streams > 1 + || encctx->codec_type != AVMEDIA_TYPE_VIDEO + || encctx->codec_id != AV_CODEC_ID_RAWVIDEO) { + av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\n"); + return AVERROR(EINVAL); + } + + if (!(tag = xv_get_tag_from_format(encctx->pix_fmt))) { + av_log(s, AV_LOG_ERROR, + "Unsupported pixel format '%s', only yuv420p, uyvy422, yuyv422 are currently supported\n", + av_get_pix_fmt_name(encctx->pix_fmt)); + return AVERROR_PATCHWELCOME; + } + xv->image_format = encctx->pix_fmt; + + xv->display = XOpenDisplay(xv->display_name); + if (!xv->display) { + av_log(s, AV_LOG_ERROR, "Could not open the X11 display '%s'\n", xv->display_name); + return AVERROR(EINVAL); + } + + xv->image_width = encctx->width; + xv->image_height = encctx->height; + if (!xv->window_width && !xv->window_height) { + AVRational sar = encctx->sample_aspect_ratio; + xv->window_width = encctx->width; + xv->window_height = encctx->height; + if (sar.num) { + if (sar.num > sar.den) + xv->window_width = av_rescale(xv->window_width, sar.num, sar.den); + if (sar.num < sar.den) + xv->window_height = av_rescale(xv->window_height, sar.den, sar.num); + } + } + xv->window = XCreateSimpleWindow(xv->display, DefaultRootWindow(xv->display), + xv->window_x, xv->window_y, + xv->window_width, xv->window_height, + 0, 0, 0); + if (!xv->window_title) { + if (!(xv->window_title = av_strdup(s->filename))) { + ret = AVERROR(ENOMEM); + goto fail; + } + } + XStoreName(xv->display, xv->window, xv->window_title); + XMapWindow(xv->display, xv->window); + + if (XvQueryAdaptors(xv->display, DefaultRootWindow(xv->display), &num_adaptors, &ai) != Success) { + ret = AVERROR_EXTERNAL; + goto fail; + } + if (!num_adaptors) { + av_log(s, AV_LOG_ERROR, "No X-Video adaptors present\n"); + return AVERROR(ENODEV); + } + xv->xv_port = ai[0].base_id; + XvFreeAdaptorInfo(ai); + + fv = XvListImageFormats(xv->display, xv->xv_port, &num_formats); + if (!fv) { + ret = AVERROR_EXTERNAL; + goto fail; + } + for (j = 0; j < num_formats; j++) { + if (fv[j].id == tag) { + break; + } + } + XFree(fv); + + if (j >= num_formats) { + av_log(s, AV_LOG_ERROR, + "Device does not support pixel format %s, aborting\n", + av_get_pix_fmt_name(encctx->pix_fmt)); + ret = AVERROR(EINVAL); + goto fail; + } + + xv->gc = XCreateGC(xv->display, xv->window, 0, 0); + xv->image_width = encctx->width; + xv->image_height = encctx->height; + xv->yuv_image = XvShmCreateImage(xv->display, xv->xv_port, tag, 0, + xv->image_width, xv->image_height, &xv->yuv_shminfo); + xv->yuv_shminfo.shmid = shmget(IPC_PRIVATE, xv->yuv_image->data_size, + IPC_CREAT | 0777); + xv->yuv_shminfo.shmaddr = (char *)shmat(xv->yuv_shminfo.shmid, 0, 0); + xv->yuv_image->data = xv->yuv_shminfo.shmaddr; + xv->yuv_shminfo.readOnly = False; + + XShmAttach(xv->display, &xv->yuv_shminfo); + XSync(xv->display, False); + shmctl(xv->yuv_shminfo.shmid, IPC_RMID, 0); + + return 0; + fail: + xv_write_trailer(s); + return ret; +} + +static int write_picture(AVFormatContext *s, AVPicture *pict) +{ + XVContext *xv = s->priv_data; + XvImage *img = xv->yuv_image; + XWindowAttributes window_attrs; + uint8_t *data[3] = { + img->data + img->offsets[0], + img->data + img->offsets[1], + img->data + img->offsets[2] + }; + + av_image_copy(data, img->pitches, (const uint8_t **)pict->data, pict->linesize, + xv->image_format, img->width, img->height); + XGetWindowAttributes(xv->display, xv->window, &window_attrs); + if (XvShmPutImage(xv->display, xv->xv_port, xv->window, xv->gc, + xv->yuv_image, 0, 0, xv->image_width, xv->image_height, 0, 0, + window_attrs.width, window_attrs.height, True) != Success) { + av_log(s, AV_LOG_ERROR, "Could not copy image to XV shared memory buffer\n"); + return AVERROR_EXTERNAL; + } + return 0; +} + +static int xv_write_packet(AVFormatContext *s, AVPacket *pkt) +{ + AVPicture pict; + AVCodecContext *ctx = s->streams[0]->codec; + + avpicture_fill(&pict, pkt->data, ctx->pix_fmt, ctx->width, ctx->height); + return write_picture(s, &pict); +} + +static int xv_write_frame(AVFormatContext *s, int stream_index, AVFrame **frame, + unsigned flags) +{ + /* xv_write_header() should have accepted only supported formats */ + if ((flags & AV_WRITE_UNCODED_FRAME_QUERY)) + return 0; + return write_picture(s, (AVPicture *)*frame); +} + +#define OFFSET(x) offsetof(XVContext, x) +static const AVOption options[] = { + { "display_name", "set display name", OFFSET(display_name), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, + { "window_size", "set window forced size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, + { "window_title", "set window title", OFFSET(window_title), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, + { "window_x", "set window x offset", OFFSET(window_x), AV_OPT_TYPE_INT, {.i64 = 0 }, -INT_MAX, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM }, + { "window_y", "set window y offset", OFFSET(window_y), AV_OPT_TYPE_INT, {.i64 = 0 }, -INT_MAX, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM }, + { NULL } + +}; + +static const AVClass xv_class = { + .class_name = "xvideo outdev", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, + .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT, +}; + +AVOutputFormat ff_xv_muxer = { + .name = "xv", + .long_name = NULL_IF_CONFIG_SMALL("XV (XVideo) output device"), + .priv_data_size = sizeof(XVContext), + .audio_codec = AV_CODEC_ID_NONE, + .video_codec = AV_CODEC_ID_RAWVIDEO, + .write_header = xv_write_header, + .write_packet = xv_write_packet, + .write_uncoded_frame = xv_write_frame, + .write_trailer = xv_write_trailer, + .flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS, + .priv_class = &xv_class, +}; |