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flvdemux: Use aac codec-data to adjust channels if needed

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Flv does not support various channels in AAC stream format, for example
flvdemux detect an audio channels of 2(stereo) when the AAC really is 1(mono).

https://bugzilla.gnome.org/show_bug.cgi?id=797275
This commit is contained in:
Yeongjin Jeong 2018-10-11 16:36:17 +09:00 committed by Olivier Crête
parent 7b5f7249e8
commit bd6a4aa10d
1 changed files with 12 additions and 1 deletions
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13
gst/flv/gstflvdemux.c
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@ -723,6 +723,7 @@ gst_flv_demux_audio_negotiate (GstFlvDemux * demux, guint32 codec_tag,
GstCaps *caps = NULL, *old_caps;
gboolean ret = FALSE;
guint adjusted_rate = rate;
guint adjusted_channels = channels;
GstEvent *event;
gchar *stream_id;
@ -784,6 +785,16 @@ gst_flv_demux_audio_negotiate (GstFlvDemux * demux, guint32 codec_tag,
} else {
adjusted_rate = rate;
}
adjusted_channels =
gst_codec_utils_aac_get_channels (map.data, map.size);
if (adjusted_channels && (channels != adjusted_channels)) {
GST_LOG_OBJECT (demux, "Ajusting AAC channels %d -> %d", channels,
adjusted_channels);
} else {
adjusted_channels = channels;
}
}
gst_buffer_unmap (demux->audio_codec_data, &map);
@ -866,7 +877,7 @@ gst_flv_demux_audio_negotiate (GstFlvDemux * demux, guint32 codec_tag,
}
gst_caps_set_simple (caps, "rate", G_TYPE_INT, adjusted_rate,
"channels", G_TYPE_INT, channels, NULL);
"channels", G_TYPE_INT, adjusted_channels, NULL);
if (demux->audio_codec_data) {
gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER,