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videometa: Added video time code meta
It attaches a GstVideoTimeCodeMeta (SMPTE timecode) as metadata to a buffer. https://bugzilla.gnome.org/show_bug.cgi?id=766419
This commit is contained in:
Vivia Nikolaidou
Sebastian Dröge
parent
ab35d7394e
commit
8d8384f20a
2 changed files with 179 additions and 0 deletions
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@ -846,3 +846,141 @@ gst_buffer_add_video_region_of_interest_meta_id (GstBuffer * buffer,
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return meta;
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}
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/* Time Code Meta implementation *******************************************/
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GType
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gst_video_time_code_meta_api_get_type (void)
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{
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static volatile GType type;
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if (g_once_init_enter (&type)) {
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static const gchar *tags[] = { NULL };
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GType _type = gst_meta_api_type_register ("GstVideoTimeCodeMetaAPI", tags);
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GST_INFO ("registering");
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g_once_init_leave (&type, _type);
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}
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return type;
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}
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static gboolean
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gst_video_time_code_meta_transform (GstBuffer * dest, GstMeta * meta,
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GstBuffer * buffer, GQuark type, gpointer data)
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{
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GstVideoTimeCodeMeta *dmeta, *smeta;
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if (GST_META_TRANSFORM_IS_COPY (type)) {
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smeta = (GstVideoTimeCodeMeta *) meta;
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GST_DEBUG ("copy time code metadata");
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dmeta =
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gst_buffer_add_video_time_code_meta_full (dest, smeta->tc.config.fps_n,
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smeta->tc.config.fps_d, smeta->tc.config.latest_daily_jam,
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smeta->tc.config.flags, smeta->tc.hours, smeta->tc.minutes,
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smeta->tc.seconds, smeta->tc.frames, smeta->tc.field_count);
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if (!dmeta)
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return FALSE;
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} else {
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/* return FALSE, if transform type is not supported */
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return FALSE;
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}
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return TRUE;
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}
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static gboolean
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gst_video_time_code_meta_init (GstMeta * meta, gpointer params,
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GstBuffer * buffer)
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{
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GstVideoTimeCodeMeta *emeta = (GstVideoTimeCodeMeta *) meta;
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memset (&emeta->tc, 0, sizeof (emeta->tc));
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gst_video_time_code_clear (&emeta->tc);
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return TRUE;
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}
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static void
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gst_video_time_code_meta_free (GstMeta * meta, GstBuffer * buffer)
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{
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GstVideoTimeCodeMeta *emeta = (GstVideoTimeCodeMeta *) meta;
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gst_video_time_code_clear (&emeta->tc);
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}
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const GstMetaInfo *
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gst_video_time_code_meta_get_info (void)
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{
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static const GstMetaInfo *meta_info = NULL;
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if (g_once_init_enter (&meta_info)) {
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const GstMetaInfo *mi =
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gst_meta_register (GST_VIDEO_TIME_CODE_META_API_TYPE,
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"GstVideoTimeCodeMeta",
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sizeof (GstVideoTimeCodeMeta),
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gst_video_time_code_meta_init,
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gst_video_time_code_meta_free,
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gst_video_time_code_meta_transform);
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g_once_init_leave (&meta_info, mi);
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}
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return meta_info;
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}
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/**
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* gst_buffer_add_video_time_code_meta:
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* @buffer: a #GstBuffer
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* @tc: a #GstVideoTimeCode
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*
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* Attaches #GstVideoTimeCodeMeta metadata to @buffer with the given
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* parameters.
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*
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* Returns: (transfer none): the #GstVideoTimeCodeMeta on @buffer.
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*
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* Since: 1.10
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*/
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GstVideoTimeCodeMeta *
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gst_buffer_add_video_time_code_meta (GstBuffer * buffer, GstVideoTimeCode * tc)
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{
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g_return_val_if_fail (gst_video_time_code_is_valid (tc), NULL);
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return gst_buffer_add_video_time_code_meta_full (buffer, tc->config.fps_n,
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tc->config.fps_d, tc->config.latest_daily_jam, tc->config.flags,
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tc->hours, tc->minutes, tc->seconds, tc->frames, tc->field_count);
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}
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/**
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* gst_buffer_add_video_time_code_meta_full:
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* @buffer: a #GstBuffer
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* @fps_n: framerate numerator
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* @fps_d: framerate denominator
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* @latest_daily_jam: a #GDateTime for the latest daily jam
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* @flags: a #GstVideoTimeCodeFlags
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* @hours: hours since the daily jam
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* @minutes: minutes since the daily jam
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* @seconds: seconds since the daily jam
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* @frames: frames since the daily jam
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* @field_count: fields since the daily jam
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*
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* Attaches #GstVideoTimeCodeMeta metadata to @buffer with the given
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* parameters.
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*
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* Returns: (transfer none): the #GstVideoTimeCodeMeta on @buffer.
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*
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* Since: 1.10
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*/
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GstVideoTimeCodeMeta *
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gst_buffer_add_video_time_code_meta_full (GstBuffer * buffer, guint fps_n,
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guint fps_d, GDateTime * latest_daily_jam, GstVideoTimeCodeFlags flags,
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guint hours, guint minutes, guint seconds, guint frames, guint field_count)
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{
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GstVideoTimeCodeMeta *meta;
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g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
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meta = (GstVideoTimeCodeMeta *) gst_buffer_add_meta (buffer,
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GST_VIDEO_TIME_CODE_META_INFO, NULL);
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gst_video_time_code_init (&meta->tc, fps_n, fps_d, latest_daily_jam, flags,
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hours, minutes, seconds, frames, field_count);
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g_return_val_if_fail (gst_video_time_code_is_valid (&meta->tc), NULL);
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return meta;
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}
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@ -23,6 +23,7 @@
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include <gst/video/gstvideotimecode.h>
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G_BEGIN_DECLS
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@ -295,6 +296,46 @@ GstVideoRegionOfInterestMeta *gst_buffer_add_video_region_of_interest_meta_id (G
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guint w,
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guint h);
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/**
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* GstVideoTimeCodeMeta:
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* @meta: parent #GstMeta
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* @tc: the GstVideoTimeCode to attach
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*
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* Extra buffer metadata describing the GstVideoTimeCode of the frame.
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*
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* Each frame is assumed to have its own timecode, i.e. they are not
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* automatically incremented/interpolated.
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*
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* Since: 1.10
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*/
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typedef struct {
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GstMeta meta;
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GstVideoTimeCode tc;
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} GstVideoTimeCodeMeta;
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GType gst_video_time_code_meta_api_get_type (void);
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#define GST_VIDEO_TIME_CODE_META_API_TYPE (gst_video_time_code_meta_api_get_type())
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const GstMetaInfo *gst_video_time_code_meta_get_info (void);
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#define GST_VIDEO_TIME_CODE_META_INFO (gst_video_time_code_meta_get_info())
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#define gst_buffer_get_video_time_code_meta(b) \
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((GstVideoTimeCodeMeta*)gst_buffer_get_meta((b),GST_VIDEO_TIME_CODE_META_API_TYPE))
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GstVideoTimeCodeMeta *gst_buffer_add_video_time_code_meta (GstBuffer * buffer,
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GstVideoTimeCode * tc);
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GstVideoTimeCodeMeta *
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gst_buffer_add_video_time_code_meta_full (GstBuffer * buffer,
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guint fps_n,
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guint fps_d,
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GDateTime * latest_daily_jam,
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GstVideoTimeCodeFlags flags,
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guint hours,
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guint minutes,
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guint seconds,
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guint frames,
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guint field_count);
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G_END_DECLS
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#endif /* __GST_VIDEO_META_H__ */
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