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x11grab: Refactor pixel format parsing

This commit is contained in:
Luca Barbato 2014-08-10 17:32:18 +02:00
parent bb3ead7e54
commit 65e78a2e4b
1 changed files with 57 additions and 60 deletions
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117
libavdevice/x11grab.c
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@ -168,6 +168,59 @@ static int setup_shm(AVFormatContext *s, Display *dpy, XImage **image)
return 0;
}
static int pixfmt_from_image(AVFormatContext *s, XImage *image, int *pix_fmt)
{
av_log(s, AV_LOG_DEBUG,
"Image r 0x%.6lx g 0x%.6lx b 0x%.6lx and depth %i\n",
image->red_mask,
image->green_mask,
image->blue_mask,
image->bits_per_pixel);
switch (image->bits_per_pixel) {
case 8:
*pix_fmt = AV_PIX_FMT_PAL8;
break;
case 16:
if (image->red_mask == 0xf800 &&
image->green_mask == 0x07e0 &&
image->blue_mask == 0x001f) {
*pix_fmt = AV_PIX_FMT_RGB565;
} else if (image->red_mask == 0x7c00 &&
image->green_mask == 0x03e0 &&
image->blue_mask == 0x001f) {
*pix_fmt = AV_PIX_FMT_RGB555;
}
break;
case 24:
if (image->red_mask == 0xff0000 &&
image->green_mask == 0x00ff00 &&
image->blue_mask == 0x0000ff) {
*pix_fmt = AV_PIX_FMT_BGR24;
} else if (image->red_mask == 0x0000ff &&
image->green_mask == 0x00ff00 &&
image->blue_mask == 0xff0000) {
*pix_fmt = AV_PIX_FMT_RGB24;
}
break;
case 32:
*pix_fmt = AV_PIX_FMT_RGB32;
break;
default:
av_log(s, AV_LOG_ERROR,
"XImages with RGB mask 0x%.6lx 0x%.6lx 0x%.6lx and depth %i "
"are currently not supported.\n",
image->red_mask,
image->green_mask,
image->blue_mask,
image->bits_per_pixel);
return AVERROR_PATCHWELCOME;
}
return 0;
}
/**
* Initialize the x11 grab device demuxer (public device demuxer API).
*
@ -183,7 +236,6 @@ static int x11grab_read_header(AVFormatContext *s1)
X11GrabContext *x11grab = s1->priv_data;
Display *dpy;
AVStream *st = NULL;
enum AVPixelFormat input_pixfmt;
XImage *image;
int x_off = 0, y_off = 0, ret = 0, screen, use_shm;
char *param, *offset;
@ -266,64 +318,6 @@ static int x11grab_read_header(AVFormatContext *s1)
AllPlanes, ZPixmap);
}
switch (image->bits_per_pixel) {
case 8:
av_log(s1, AV_LOG_DEBUG, "8 bit palette\n");
input_pixfmt = AV_PIX_FMT_PAL8;
break;
case 16:
if (image->red_mask == 0xf800 &&
image->green_mask == 0x07e0 &&
image->blue_mask == 0x001f) {
av_log(s1, AV_LOG_DEBUG, "16 bit RGB565\n");
input_pixfmt = AV_PIX_FMT_RGB565;
} else if (image->red_mask == 0x7c00 &&
image->green_mask == 0x03e0 &&
image->blue_mask == 0x001f) {
av_log(s1, AV_LOG_DEBUG, "16 bit RGB555\n");
input_pixfmt = AV_PIX_FMT_RGB555;
} else {
av_log(s1, AV_LOG_ERROR,
"RGB ordering at image depth %i not supported ... aborting\n",
image->bits_per_pixel);
av_log(s1, AV_LOG_ERROR,
"color masks: r 0x%.6lx g 0x%.6lx b 0x%.6lx\n",
image->red_mask, image->green_mask, image->blue_mask);
ret = AVERROR(EIO);
goto out;
}
break;
case 24:
if (image->red_mask == 0xff0000 &&
image->green_mask == 0x00ff00 &&
image->blue_mask == 0x0000ff) {
input_pixfmt = AV_PIX_FMT_BGR24;
} else if (image->red_mask == 0x0000ff &&
image->green_mask == 0x00ff00 &&
image->blue_mask == 0xff0000) {
input_pixfmt = AV_PIX_FMT_RGB24;
} else {
av_log(s1, AV_LOG_ERROR,
"rgb ordering at image depth %i not supported ... aborting\n",
image->bits_per_pixel);
av_log(s1, AV_LOG_ERROR,
"color masks: r 0x%.6lx g 0x%.6lx b 0x%.6lx\n",
image->red_mask, image->green_mask, image->blue_mask);
ret = AVERROR(EIO);
goto out;
}
break;
case 32:
input_pixfmt = AV_PIX_FMT_RGB32;
break;
default:
av_log(s1, AV_LOG_ERROR,
"image depth %i not supported ... aborting\n",
image->bits_per_pixel);
ret = AVERROR(EINVAL);
goto out;
}
x11grab->frame_size = x11grab->width * x11grab->height * image->bits_per_pixel / 8;
x11grab->dpy = dpy;
x11grab->time_base = (AVRational) { framerate.den, framerate.num };
@ -333,11 +327,14 @@ static int x11grab_read_header(AVFormatContext *s1)
x11grab->image = image;
x11grab->use_shm = use_shm;
ret = pixfmt_from_image(s1, image, &st->codec->pix_fmt);
if (ret < 0)
goto out;
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
st->codec->width = x11grab->width;
st->codec->height = x11grab->height;
st->codec->pix_fmt = input_pixfmt;
st->codec->time_base = x11grab->time_base;
st->codec->bit_rate = x11grab->frame_size * 1 / av_q2d(x11grab->time_base) * 8;