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videotimecode: Validate for drop-frame correctness
In gst_video_time_code_is_valid, also check for invalid ranges when using drop-frame TC. Refactor some code which broke after the check was added. https://bugzilla.gnome.org/show_bug.cgi?id=779010
This commit is contained in:
Georg Lippitsch
Sebastian Dröge
parent
b3df5786a9
commit
d15ad75caf
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@ -17,8 +17,8 @@
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* Boston, MA 02110-1301, USA.
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*/
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#include <stdio.h>
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#include "gstvideotimecode.h"
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#include "stdio.h"
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static void
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gst_video_time_code_gvalue_to_string (const GValue * tc_val, GValue * str_val);
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@ -62,9 +62,13 @@ G_DEFINE_BOXED_TYPE_WITH_CODE (GstVideoTimeCode, gst_video_time_code,
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gboolean
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gst_video_time_code_is_valid (const GstVideoTimeCode * tc)
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{
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guint fr;
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g_return_val_if_fail (tc != NULL, FALSE);
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if (tc->hours > 24)
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fr = (tc->config.fps_n + (tc->config.fps_d >> 1)) / tc->config.fps_d;
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if (tc->hours >= 24)
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return FALSE;
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if (tc->minutes >= 60)
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return FALSE;
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@ -72,8 +76,7 @@ gst_video_time_code_is_valid (const GstVideoTimeCode * tc)
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return FALSE;
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if (tc->config.fps_d == 0)
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return FALSE;
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if ((tc->frames > tc->config.fps_n / tc->config.fps_d)
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&& (tc->config.fps_n != 0 || tc->config.fps_d != 1))
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if (tc->frames >= fr && (tc->config.fps_n != 0 || tc->config.fps_d != 1))
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return FALSE;
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if (tc->config.fps_d == 1001) {
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if (tc->config.fps_n != 30000 && tc->config.fps_n != 60000)
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@ -81,6 +84,10 @@ gst_video_time_code_is_valid (const GstVideoTimeCode * tc)
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} else if (tc->config.fps_n % tc->config.fps_d != 0) {
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return FALSE;
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}
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if ((tc->config.flags & GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME) &&
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tc->minutes % 10 && tc->seconds == 0 && tc->frames < fr / 15) {
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return FALSE;
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}
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return TRUE;
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}
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@ -109,8 +116,6 @@ gst_video_time_code_to_string (const GstVideoTimeCode * tc)
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gboolean top_dot_present;
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gchar sep;
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g_return_val_if_fail (gst_video_time_code_is_valid (tc), NULL);
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/* Top dot is present for non-interlaced content, and for field 2 in
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* interlaced content */
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top_dot_present =
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@ -131,7 +136,7 @@ gst_video_time_code_to_string (const GstVideoTimeCode * tc)
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/**
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* gst_video_time_code_to_date_time:
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* @tc: #GstVideoTimeCode to convert
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* @tc: A valid #GstVideoTimeCode to convert
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*
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* The @tc.config->latest_daily_jam is required to be non-NULL.
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*
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@ -241,7 +246,7 @@ gst_video_time_code_init_from_date_time (GstVideoTimeCode * tc,
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/**
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* gst_video_time_code_nsec_since_daily_jam:
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* @tc: a #GstVideoTimeCode
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* @tc: a valid #GstVideoTimeCode
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*
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* Returns: how many nsec have passed since the daily jam of @tc .
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*
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@ -273,7 +278,7 @@ gst_video_time_code_nsec_since_daily_jam (const GstVideoTimeCode * tc)
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/**
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* gst_video_time_code_frames_since_daily_jam:
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* @tc: a #GstVideoTimeCode
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* @tc: a valid #GstVideoTimeCode
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*
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* Returns: how many frames have passed since the daily jam of @tc .
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*
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@ -286,10 +291,6 @@ gst_video_time_code_frames_since_daily_jam (const GstVideoTimeCode * tc)
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gdouble ff;
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g_return_val_if_fail (gst_video_time_code_is_valid (tc), -1);
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g_assert (tc->hours <= 24);
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g_assert (tc->minutes < 60);
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g_assert (tc->seconds < 60);
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g_assert (tc->frames <= tc->config.fps_n / tc->config.fps_d);
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gst_util_fraction_to_double (tc->config.fps_n, tc->config.fps_d, &ff);
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if (tc->config.fps_d == 1001) {
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@ -329,7 +330,7 @@ gst_video_time_code_frames_since_daily_jam (const GstVideoTimeCode * tc)
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/**
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* gst_video_time_code_increment_frame:
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* @tc: a #GstVideoTimeCode
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* @tc: a valid #GstVideoTimeCode
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*
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* Adds one frame to @tc .
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*
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@ -343,10 +344,11 @@ gst_video_time_code_increment_frame (GstVideoTimeCode * tc)
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/**
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* gst_video_time_code_add_frames:
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* @tc: a #GstVideoTimeCode
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* @tc: a valid #GstVideoTimeCode
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* @frames: How many frames to add or subtract
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*
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* Adds or subtracts @frames amount of frames to @tc .
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* Adds or subtracts @frames amount of frames to @tc. tc needs to
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* contain valid data, as verified by #gst_video_time_code_is_valid.
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*
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* Since: 1.10
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*/
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@ -365,10 +367,6 @@ gst_video_time_code_add_frames (GstVideoTimeCode * tc, gint64 frames)
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* and adapted for 60/1.001 as well as 30/1.001 */
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g_return_if_fail (gst_video_time_code_is_valid (tc));
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g_assert (tc->hours <= 24);
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g_assert (tc->minutes < 60);
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g_assert (tc->seconds < 60);
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g_assert (tc->frames <= tc->config.fps_n / tc->config.fps_d);
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gst_util_fraction_to_double (tc->config.fps_n, tc->config.fps_d, &ff);
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if (tc->config.fps_d == 1001) {
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@ -464,7 +462,7 @@ gst_video_time_code_add_frames (GstVideoTimeCode * tc, gint64 frames)
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*
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* Compares @tc1 and @tc2 . If both have latest daily jam information, it is
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* taken into account. Otherwise, it is assumed that the daily jam of both
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* @tc1 and @tc2 was at the same time.
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* @tc1 and @tc2 was at the same time. Both time codes must be valid.
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*
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* Returns: 1 if @tc1 is after @tc2, -1 if @tc1 is before @tc2, 0 otherwise.
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*
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@ -558,6 +556,8 @@ gst_video_time_code_compare (const GstVideoTimeCode * tc1,
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* @latest_daiy_jam reference is stolen from caller.
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*
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* Returns: a new #GstVideoTimeCode with the given values.
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* The values are not checked for being in a valid range. To see if your
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* timecode actually has valid content, use #gst_video_time_code_is_valid.
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*
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* Since: 1.10
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*/
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@ -710,6 +710,8 @@ gst_video_time_code_new_from_date_time (guint fps_n, guint fps_d,
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* @latest_daiy_jam reference is stolen from caller.
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*
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* Initializes @tc with the given values.
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* The values are not checked for being in a valid range. To see if your
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* timecode actually has valid content, use #gst_video_time_code_is_valid.
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*
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* Since: 1.10
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*/
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@ -730,8 +732,6 @@ gst_video_time_code_init (GstVideoTimeCode * tc, guint fps_n, guint fps_d,
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else
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tc->config.latest_daily_jam = NULL;
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tc->config.flags = flags;
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g_return_if_fail (gst_video_time_code_is_valid (tc));
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}
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/**
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@ -793,8 +793,12 @@ gst_video_time_code_free (GstVideoTimeCode * tc)
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/**
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* gst_video_time_code_add_interval:
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* @tc: The #GstVideoTimeCode where the diff should be added
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* @tc_inter: The #GstVideoTimeCodeInterval to add to @tc
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* @tc: The #GstVideoTimeCode where the diff should be added. This
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* must contain valid timecode values.
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* @tc_inter: The #GstVideoTimeCodeInterval to add to @tc.
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* The interval must contain valid values, except that for drop-frame
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* timecode, it may also contain timecodes which would normally
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* be dropped. These are then corrected to the next reasonable timecode.
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*
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* This makes a component-wise addition of @tc_inter to @tc. For example,
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* adding ("01:02:03:04", "00:01:00:00") will return "01:03:03:04".
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@ -812,42 +816,51 @@ GstVideoTimeCode *
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gst_video_time_code_add_interval (const GstVideoTimeCode * tc,
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const GstVideoTimeCodeInterval * tc_inter)
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{
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GstVideoTimeCode *ret =
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gst_video_time_code_new (tc->config.fps_n, tc->config.fps_d,
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GstVideoTimeCode *ret;
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guint frames_to_add;
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guint df;
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gboolean needs_correction;
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g_return_val_if_fail (gst_video_time_code_is_valid (tc), NULL);
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ret = gst_video_time_code_new (tc->config.fps_n, tc->config.fps_d,
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tc->config.latest_daily_jam, tc->config.flags, tc_inter->hours,
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tc_inter->minutes, tc_inter->seconds, tc_inter->frames, 0);
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guint frames_to_add = gst_video_time_code_frames_since_daily_jam (tc);
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gboolean check_again = FALSE;
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df = (tc->config.fps_n + (tc->config.fps_d >> 1)) / (tc->config.fps_d * 15);
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/* Drop-frame compensation: Create a valid timecode from the
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* interval */
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needs_correction = (tc->config.flags & GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME)
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&& ret->minutes % 10 && ret->seconds == 0 && ret->frames < df;
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if (needs_correction) {
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ret->minutes--;
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ret->seconds = 59;
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ret->frames = df * 14;
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}
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if (!gst_video_time_code_is_valid (ret)) {
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GST_ERROR ("Unsupported time code interval");
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gst_video_time_code_free (ret);
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return NULL;
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}
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frames_to_add = gst_video_time_code_frames_since_daily_jam (tc);
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/* Drop-frame compensation: 00:01:00;00 is falsely interpreted as
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* 00:00:59;28 */
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if (tc->config.flags & GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME &&
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tc_inter->frames == 0 && tc_inter->seconds == 0
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&& (tc_inter->minutes % 10 != 0)) {
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if (needs_correction) {
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/* User wants us to split at invalid timecodes */
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check_again = TRUE;
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if (tc->minutes % 10 == 0) {
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if (tc->minutes % 10 == 0 && tc->frames <= df) {
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/* Apply compensation every 10th minute: before adding the frames,
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* but only if we are before the "invalid frame" mark */
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if (tc->config.fps_n == 30000 && tc->frames <= 2) {
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frames_to_add += 2;
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check_again = FALSE;
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} else if (tc->config.fps_n == 60000 && tc->frames <= 4) {
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frames_to_add += 4;
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check_again = FALSE;
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}
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frames_to_add += df;
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needs_correction = FALSE;
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}
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}
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gst_video_time_code_add_frames (ret, frames_to_add);
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if (check_again && ret->minutes % 10 == 0) {
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if (ret->config.fps_n == 30000 && tc->frames > 2) {
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frames_to_add = 2;
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} else if (ret->config.fps_n == 60000 && tc->frames > 4) {
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frames_to_add = 4;
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} else {
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frames_to_add = 0;
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}
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gst_video_time_code_add_frames (ret, frames_to_add);
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if (needs_correction && ret->minutes % 10 == 0 && tc->frames > df) {
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gst_video_time_code_add_frames (ret, df);
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}
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return ret;
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@ -584,6 +584,30 @@ GST_START_TEST (videotimecode_interval)
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GST_END_TEST;
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GST_START_TEST (videotimecode_invalid)
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{
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GstVideoTimeCode *tc;
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tc = gst_video_time_code_new (25, 1, NULL,
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GST_VIDEO_TIME_CODE_FLAGS_NONE, 1, 67, 4, 5, 0);
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fail_unless (gst_video_time_code_is_valid (tc) == FALSE);
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gst_video_time_code_free (tc);
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tc = gst_video_time_code_new (60, 1, NULL,
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GST_VIDEO_TIME_CODE_FLAGS_NONE, 28, 1, 2, 3, 0);
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fail_unless (gst_video_time_code_is_valid (tc) == FALSE);
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gst_video_time_code_free (tc);
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tc = gst_video_time_code_new (30000, 1001, NULL,
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GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME, 1, 23, 0, 0, 0);
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fail_unless (gst_video_time_code_is_valid (tc) == FALSE);
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gst_video_time_code_free (tc);
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tc = gst_video_time_code_new (25, 1, NULL,
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GST_VIDEO_TIME_CODE_FLAGS_NONE, 10, 11, 12, 13, 0);
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fail_unless (gst_video_time_code_is_valid (tc) == TRUE);
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gst_video_time_code_free (tc);
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}
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GST_END_TEST;
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GST_START_TEST (videotimecode_from_date_time_1s)
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{
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GstVideoTimeCode *tc;
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@ -679,6 +703,7 @@ gst_videotimecode_suite (void)
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tcase_add_test (tc, videotimecode_dailyjam_distance);
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tcase_add_test (tc, videotimecode_serialize_deserialize);
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tcase_add_test (tc, videotimecode_interval);
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tcase_add_test (tc, videotimecode_invalid);
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tcase_add_test (tc, videotimecode_from_date_time_1s);
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tcase_add_test (tc, videotimecode_from_date_time_halfsecond);
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