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opusenc: Reverse channel order in template caps

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We want to make it so that we prefer a higher, not lower, number of
channels. Otherwise, this pipeline would convert from 2 to 1 channels:

gst-launch-1.0 audiotestsrc ! audio/x-raw,channels=2 ! opusenc ! queue ! opusdec ! queue ! opusenc ! fakesink

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3494>
This commit is contained in:
Vivia Nikolaidou 2022-11-30 20:46:05 +02:00
parent 090cf943ed
commit cdf411e82d
1 changed files with 9 additions and 10 deletions
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19
subprojects/gst-plugins-base/ext/opus/gstopusenc.c
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@ -857,17 +857,8 @@ gst_opus_enc_get_sink_template_caps (void)
g_value_unset (&rate_array);
g_value_unset (&v);
/* Mono */
s = gst_structure_copy (s1);
gst_structure_set (s, "channels", G_TYPE_INT, 1, NULL);
gst_caps_append_structure (caps, s);
s = gst_structure_copy (s2);
gst_structure_set (s, "channels", G_TYPE_INT, 1, NULL);
gst_caps_append_structure (caps, s);
/* Stereo and further */
for (i = 2; i <= 8; i++) {
for (i = 8; i >= 2; i--) {
guint64 channel_mask = 0;
const GstAudioChannelPosition *pos = gst_opus_channel_positions[i - 1];
@ -898,6 +889,14 @@ gst_opus_enc_get_sink_template_caps (void)
gst_caps_append_structure (caps, s);
}
/* Mono */
s = gst_structure_copy (s1);
gst_structure_set (s, "channels", G_TYPE_INT, 1, NULL);
gst_caps_append_structure (caps, s);
s = gst_structure_copy (s2);
gst_structure_set (s, "channels", G_TYPE_INT, 1, NULL);
gst_caps_append_structure (caps, s);
gst_structure_free (s1);
gst_structure_free (s2);