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audioconvert: make fixate function more readable

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Use some variables to replace accessor macros to make code
a little bit mor readable.
This commit is contained in:
Tim-Philipp Müller 2013-08-23 19:05:41 +01:00
parent f448977dbd
commit 7a481c13ae
1 changed files with 15 additions and 18 deletions
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33
gst/audioconvert/gstaudioconvert.c
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@ -443,6 +443,7 @@ gst_audio_convert_fixate_format (GstBaseTransform * base, GstStructure * ins,
const GValue *format;
const GstAudioFormatInfo *in_info, *out_info = NULL;
GstAudioFormatFlags in_flags, out_flags = 0;
gint in_depth, out_depth = -1;
gint i, len;
in_format = gst_structure_get_string (ins, "format");
@ -467,12 +468,15 @@ gst_audio_convert_fixate_format (GstBaseTransform * base, GstStructure * ins,
in_flags &= ~(GST_AUDIO_FORMAT_FLAG_UNPACK);
in_flags &= ~(GST_AUDIO_FORMAT_FLAG_SIGNED);
in_depth = GST_AUDIO_FORMAT_INFO_DEPTH (in_info);
len = gst_value_list_get_size (format);
for (i = 0; i < len; i++) {
const GstAudioFormatInfo *t_info;
GstAudioFormatFlags t_flags;
const GValue *val;
const gchar *fname;
gint t_depth;
val = gst_value_list_get_value (format, i);
if (!G_VALUE_HOLDS_STRING (val))
@ -493,38 +497,31 @@ gst_audio_convert_fixate_format (GstBaseTransform * base, GstStructure * ins,
t_flags &= ~(GST_AUDIO_FORMAT_FLAG_UNPACK);
t_flags &= ~(GST_AUDIO_FORMAT_FLAG_SIGNED);
if (GST_AUDIO_FORMAT_INFO_DEPTH (t_info) ==
GST_AUDIO_FORMAT_INFO_DEPTH (in_info) && (!out_info
|| GST_AUDIO_FORMAT_INFO_DEPTH (out_info) !=
GST_AUDIO_FORMAT_INFO_DEPTH (in_info)
t_depth = GST_AUDIO_FORMAT_INFO_DEPTH (t_info);
if (t_depth == in_depth && (!out_info || out_depth != in_depth
|| (t_flags == in_flags && out_flags != in_flags))) {
/* Prefer to use the first format that has the same depth with the same
* flags, and if none with the same flags exist use the first other one
* that has the same depth */
out_info = t_info;
out_depth = t_depth;
out_flags = t_flags;
} else if (GST_AUDIO_FORMAT_INFO_DEPTH (t_info) >=
GST_AUDIO_FORMAT_INFO_DEPTH (in_info) && (!out_info
|| GST_AUDIO_FORMAT_INFO_DEPTH (in_info) >
GST_AUDIO_FORMAT_INFO_DEPTH (out_info)
|| (GST_AUDIO_FORMAT_INFO_DEPTH (out_info) >=
GST_AUDIO_FORMAT_INFO_DEPTH (in_info) && t_flags == in_flags
} else if (t_depth >= in_depth && (!out_info || in_depth > out_depth
|| (out_depth >= in_depth && t_flags == in_flags
&& out_flags != in_flags))) {
/* Otherwise use the first format that has a higher depth with the same flags,
* if none with the same flags exist use the first other one that has a higher
* depth */
out_info = t_info;
out_depth = t_depth;
out_flags = t_flags;
} else if (!out_info
|| (GST_AUDIO_FORMAT_INFO_DEPTH (t_info) >
GST_AUDIO_FORMAT_INFO_DEPTH (out_info)
&& GST_AUDIO_FORMAT_INFO_DEPTH (out_info) <
GST_AUDIO_FORMAT_INFO_DEPTH (in_info)) || (t_flags == in_flags
&& out_flags != in_flags
&& GST_AUDIO_FORMAT_INFO_DEPTH (out_info) ==
GST_AUDIO_FORMAT_INFO_DEPTH (t_info))) {
} else if (!out_info || (t_depth > out_depth && out_depth < in_depth)
|| (t_flags == in_flags && out_flags != in_flags
&& out_depth == t_depth)) {
/* Else get at least the one with the highest depth, ideally with the same flags */
out_info = t_info;
out_depth = t_depth;
out_flags = t_flags;
}