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audioparse: add support for A-Law and µ-Law

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This commit is contained in:
Tim-Philipp Müller 2009-05-28 23:12:13 +01:00
parent 530377c40f
commit 53eeb90c21
1 changed files with 54 additions and 19 deletions
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73
gst/rawparse/gstaudioparse.c
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@ -33,7 +33,9 @@
typedef enum
{
GST_AUDIO_PARSE_FORMAT_INT,
GST_AUDIO_PARSE_FORMAT_FLOAT
GST_AUDIO_PARSE_FORMAT_FLOAT,
GST_AUDIO_PARSE_FORMAT_MULAW,
GST_AUDIO_PARSE_FORMAT_ALAW
} GstAudioParseFormat;
typedef enum
@ -69,7 +71,7 @@ enum
ARG_ENDIANNESS,
ARG_WIDTH,
ARG_DEPTH,
ARG_SIGNED,
ARG_SIGNED
};
@ -81,6 +83,8 @@ gst_audio_parse_format_get_type (void)
static const GEnumValue format_types[] = {
{GST_AUDIO_PARSE_FORMAT_INT, "Integer", "int"},
{GST_AUDIO_PARSE_FORMAT_FLOAT, "Floating Point", "float"},
{GST_AUDIO_PARSE_FORMAT_ALAW, "A-Law", "alaw"},
{GST_AUDIO_PARSE_FORMAT_MULAW, "\302\265-Law", "mulaw"},
{0, NULL, NULL}
};
@ -137,7 +141,9 @@ gst_audio_parse_base_init (gpointer g_class)
"audio/x-raw-float,"
" width=(int) { 32, 64 },"
" endianness=(int) { LITTLE_ENDIAN, BIG_ENDIAN }, "
" rate=(int)[1,MAX]," " channels=(int)[1,MAX]");
" rate=(int)[1,MAX], channels=(int)[1,MAX]; "
"audio/x-alaw, rate=(int)[1,MAX], channels=(int)[1,MAX]; "
"audio/x-mulaw, rate=(int)[1,MAX], channels=(int)[1,MAX]");
gst_raw_parse_class_set_src_pad_template (rp_class, caps);
gst_raw_parse_class_set_multiple_frames_per_buffer (rp_class, TRUE);
@ -282,9 +288,21 @@ gst_audio_parse_get_property (GObject * object, guint prop_id, GValue * value,
void
gst_audio_parse_update_frame_size (GstAudioParse * ap)
{
gint framesize;
gint framesize, width;
framesize = (ap->width / 8) * ap->channels;
switch (ap->format) {
case GST_AUDIO_PARSE_FORMAT_ALAW:
case GST_AUDIO_PARSE_FORMAT_MULAW:
width = 8;
break;
case GST_AUDIO_PARSE_FORMAT_INT:
case GST_AUDIO_PARSE_FORMAT_FLOAT:
default:
width = ap->width;
break;
}
framesize = (width / 8) * ap->channels;
gst_raw_parse_set_framesize (GST_RAW_PARSE (ap), framesize);
}
@ -299,20 +317,37 @@ gst_audio_parse_get_caps (GstRawParse * rp)
gst_raw_parse_get_fps (rp, &fps_n, &fps_d);
if (ap->format == GST_AUDIO_PARSE_FORMAT_INT) {
caps = gst_caps_new_simple ("audio/x-raw-int",
"rate", G_TYPE_INT, fps_n,
"channels", G_TYPE_INT, ap->channels,
"width", G_TYPE_INT, ap->width,
"depth", G_TYPE_INT, ap->depth,
"signed", G_TYPE_BOOLEAN, ap->signedness,
"endianness", G_TYPE_INT, ap->endianness, NULL);
} else {
caps = gst_caps_new_simple ("audio/x-raw-float",
"rate", G_TYPE_INT, fps_n,
"channels", G_TYPE_INT, ap->channels,
"width", G_TYPE_INT, ap->width,
"endianness", G_TYPE_INT, ap->endianness, NULL);
switch (ap->format) {
case GST_AUDIO_PARSE_FORMAT_INT:
caps = gst_caps_new_simple ("audio/x-raw-int",
"rate", G_TYPE_INT, fps_n,
"channels", G_TYPE_INT, ap->channels,
"width", G_TYPE_INT, ap->width,
"depth", G_TYPE_INT, ap->depth,
"signed", G_TYPE_BOOLEAN, ap->signedness,
"endianness", G_TYPE_INT, ap->endianness, NULL);
break;
case GST_AUDIO_PARSE_FORMAT_FLOAT:
caps = gst_caps_new_simple ("audio/x-raw-float",
"rate", G_TYPE_INT, fps_n,
"channels", G_TYPE_INT, ap->channels,
"width", G_TYPE_INT, ap->width,
"endianness", G_TYPE_INT, ap->endianness, NULL);
break;
case GST_AUDIO_PARSE_FORMAT_ALAW:
caps = gst_caps_new_simple ("audio/x-alaw",
"rate", G_TYPE_INT, fps_n,
"channels", G_TYPE_INT, ap->channels, NULL);
break;
case GST_AUDIO_PARSE_FORMAT_MULAW:
caps = gst_caps_new_simple ("audio/x-mulaw",
"rate", G_TYPE_INT, fps_n,
"channels", G_TYPE_INT, ap->channels, NULL);
break;
default:
caps = gst_caps_new_empty ();
GST_ERROR_OBJECT (rp, "unexpected format %d", ap->format);
break;
}
return caps;
}