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opusenc: Use downstream channel configuration when using channel mapping family 255

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Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4180>
This commit is contained in:
Sebastian Dröge 2023-03-15 19:31:47 +02:00 committed by GStreamer Marge Bot
parent 7e63427827
commit d78bed99e8
1 changed files with 35 additions and 0 deletions
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35
subprojects/gst-plugins-base/ext/opus/gstopusenc.c
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@ -657,6 +657,41 @@ unpositioned:
enc->channel_mapping_family = 255;
enc->n_stereo_streams = 0;
/* check if downstream requests a specific channel configuration */
{
GstCaps *allowed_caps =
gst_pad_get_allowed_caps (GST_AUDIO_ENCODER_SRC_PAD (enc));
GstCaps *filter_caps =
gst_caps_new_simple ("audio/x-opus", "channels", G_TYPE_INT,
enc->n_channels, "rate", G_TYPE_INT, enc->sample_rate,
"channel-mapping-family", G_TYPE_INT, 255, NULL);
if (allowed_caps) {
GstCaps *intersection =
gst_caps_intersect_full (allowed_caps, filter_caps,
GST_CAPS_INTERSECT_FIRST);
guint8 stream_count, coupled_count;
guint8 channel_mapping[256];
intersection = gst_caps_fixate (intersection);
if (gst_codec_utils_opus_parse_caps (intersection, NULL, NULL, NULL,
&stream_count, &coupled_count, channel_mapping)
&& stream_count + coupled_count == enc->n_channels) {
enc->n_stereo_streams = coupled_count;
memcpy (enc->decoding_channel_mapping, channel_mapping,
sizeof (channel_mapping));
memcpy (enc->encoding_channel_mapping, channel_mapping,
sizeof (channel_mapping));
}
gst_clear_caps (&intersection);
}
gst_clear_caps (&allowed_caps);
gst_clear_caps (&filter_caps);
}
#ifndef GST_DISABLE_GST_DEBUG
GST_INFO_OBJECT (enc,
"Mapping tables built: %d channels, %d stereo streams", enc->n_channels,