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Properly set the image depth

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Originally committed as revision 5538 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Luca Abeni 2006-06-28 12:18:22 +00:00
parent b582d7ba4d
commit 76a77ff291
1 changed files with 12 additions and 4 deletions
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16
libavformat/grab.c
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@ -62,7 +62,7 @@ static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
int width, height;
int video_fd, frame_size;
int ret, frame_rate, frame_rate_base;
int desired_palette;
int desired_palette, desired_depth;
struct video_tuner tuner;
struct video_audio audio;
struct video_picture pict;
@ -118,12 +118,16 @@ static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
}
desired_palette = -1;
if (st->codec->pix_fmt == PIX_FMT_YUV420P) {
desired_depth = -1;
if (ap->pix_fmt == PIX_FMT_YUV420P) {
desired_palette = VIDEO_PALETTE_YUV420P;
} else if (st->codec->pix_fmt == PIX_FMT_YUV422) {
desired_depth = 12;
} else if (ap->pix_fmt == PIX_FMT_YUV422) {
desired_palette = VIDEO_PALETTE_YUV422;
} else if (st->codec->pix_fmt == PIX_FMT_BGR24) {
desired_depth = 16;
} else if (ap->pix_fmt == PIX_FMT_BGR24) {
desired_palette = VIDEO_PALETTE_RGB24;
desired_depth = 24;
}
/* set tv standard */
@ -155,14 +159,18 @@ static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
#endif
/* try to choose a suitable video format */
pict.palette = desired_palette;
pict.depth= desired_depth;
if (desired_palette == -1 || (ret = ioctl(video_fd, VIDIOCSPICT, &pict)) < 0) {
pict.palette=VIDEO_PALETTE_YUV420P;
pict.depth=12;
ret = ioctl(video_fd, VIDIOCSPICT, &pict);
if (ret < 0) {
pict.palette=VIDEO_PALETTE_YUV422;
pict.depth=16;
ret = ioctl(video_fd, VIDIOCSPICT, &pict);
if (ret < 0) {
pict.palette=VIDEO_PALETTE_RGB24;
pict.depth=24;
ret = ioctl(video_fd, VIDIOCSPICT, &pict);
if (ret < 0)
goto fail1;