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pbutils: descriptions: use subsampling factor to get YUV subsampling
The algorithm used to determine the YUV subsampling string uses width and height subsampling factor, not the raw subsampling. Otherwise all 4:2:0 YUV frames will be detected as 4:4:4 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7353>
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2 changed files with 29 additions and 2 deletions
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@ -473,8 +473,8 @@ format_info_get_desc (const FormatInfo * info, const GstCaps * caps)
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const gchar *subs;
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gint w_sub, h_sub, n_semi;
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w_sub = GST_VIDEO_FORMAT_INFO_W_SUB (finfo, 1);
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h_sub = GST_VIDEO_FORMAT_INFO_H_SUB (finfo, 1);
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w_sub = 1 << GST_VIDEO_FORMAT_INFO_W_SUB (finfo, 1);
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h_sub = 1 << GST_VIDEO_FORMAT_INFO_H_SUB (finfo, 1);
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if (w_sub == 1 && h_sub == 1) {
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subs = "4:4:4";
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@ -456,10 +456,36 @@ static const gchar *caps_strings[] = {
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/* raw video */
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"video/x-raw, format=(string)RGB16, width=(int)320, height=(int)240, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1",
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"video/x-raw, format=(string)YUY2, width=(int)320, height=(int)240, framerate=(fraction)30/1",
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"video/x-raw, format=(string)I420, width=(int)320, height=(int)240, framerate=(fraction)30/1",
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"video/x-raw, format=(string)AYUV, width=(int)320, height=(int)240, framerate=(fraction)30/1",
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/* and a made-up format */
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"video/x-tpm"
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};
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static gboolean
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validate_video_subsampling (GstCaps * caps, gchar * desc)
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{
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GstStructure *st;
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const gchar *format;
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st = gst_caps_get_structure (caps, 0);
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if (!gst_structure_has_name (st, "video/x-raw"))
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return TRUE;
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format = gst_structure_get_string (st, "format");
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if (!format)
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return TRUE;
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if (g_strcmp0 (format, "YUY2") == 0)
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return g_str_has_suffix (desc, "4:2:2");
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if (g_strcmp0 (format, "I420") == 0)
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return g_str_has_suffix (desc, "4:2:0");
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if (g_strcmp0 (format, "AYUV") == 0)
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return g_str_has_suffix (desc, "4:4:4");
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return TRUE;
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}
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GST_START_TEST (test_pb_utils_get_codec_description)
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{
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gint i;
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@ -478,6 +504,7 @@ GST_START_TEST (test_pb_utils_get_codec_description)
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fail_unless (desc != NULL);
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GST_LOG (" - codec : %s", desc);
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fail_unless (g_utf8_validate (desc, -1, NULL));
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fail_unless (validate_video_subsampling (caps, desc));
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g_free (desc);
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desc = gst_pb_utils_get_decoder_description (caps);
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fail_unless (desc != NULL);
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