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mpg123: query supported output formats at run-time

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Fixes stuff. We use a string here since we can't be bothered
with GValue.
This commit is contained in:
Tim-Philipp Müller 2012-08-03 11:50:10 +01:00
parent b71fcf6ec1
commit a752d5840f
1 changed files with 55 additions and 61 deletions
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116
ext/mpg123/gstmpg123audiodec.c
View file

@ -79,7 +79,6 @@ gst_mpg123_audio_dec_class_init (GstMpg123AudioDecClass * klass)
GObjectClass *object_class;
GstAudioDecoderClass *base_class;
GstElementClass *element_class;
GstCaps *src_caps;
GstPadTemplate *src_template;
int error;
@ -102,57 +101,66 @@ gst_mpg123_audio_dec_class_init (GstMpg123AudioDecClass * klass)
created depending on whatever mpg123 supports
*/
{
gchar *format_string;
gchar *caps_string;
const int *format_list;
const long *rates_list;
size_t num, i;
GString *s;
static gchar const *src_caps_begin = "audio/x-raw, " "format = { ";
static gchar const *src_caps_end =
" }, "
"rate = (int) { 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000 }, "
"channels = (int) [ 1, 2 ], " "layout = (string) interleaved; ";
s = g_string_new ("audio/x-raw, ");
#if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
#define ENDIAN_POSTFIX "LE"
#else
#define ENDIAN_POSTFIX "BE"
#endif
mpg123_encodings (&format_list, &num);
g_string_append (s, "format = { ");
for (i = 0; i < num; ++i) {
switch (format_list[i]) {
case MPG123_ENC_SIGNED_16:
g_string_append (s, (i > 0) ? ", " : "");
g_string_append (s, GST_AUDIO_NE (S16));
break;
case MPG123_ENC_UNSIGNED_16:
g_string_append (s, (i > 0) ? ", " : "");
g_string_append (s, GST_AUDIO_NE (U16));
break;
case MPG123_ENC_SIGNED_24:
g_string_append (s, (i > 0) ? ", " : "");
g_string_append (s, GST_AUDIO_NE (S24));
break;
case MPG123_ENC_UNSIGNED_24:
g_string_append (s, (i > 0) ? ", " : "");
g_string_append (s, GST_AUDIO_NE (U24));
break;
case MPG123_ENC_SIGNED_32:
g_string_append (s, (i > 0) ? ", " : "");
g_string_append (s, GST_AUDIO_NE (S32));
break;
case MPG123_ENC_UNSIGNED_32:
g_string_append (s, (i > 0) ? ", " : "");
g_string_append (s, GST_AUDIO_NE (U32));
break;
case MPG123_ENC_FLOAT_32:
g_string_append (s, (i > 0) ? ", " : "");
g_string_append (s, GST_AUDIO_NE (F32));
break;
default:
GST_DEBUG ("Ignoring mpg123 format %d", format_list[i]);
break;
}
}
g_string_append (s, " }, ");
static gchar *supported_formats[] = {
#ifdef MPG123_ENC_SIGNED_16
"S16" ENDIAN_POSTFIX,
#endif
#ifdef MPG123_ENC_UNSIGNED_16
"U16" ENDIAN_POSTFIX,
#endif
#ifdef MPG123_ENC_SIGNED_24
"S24" ENDIAN_POSTFIX,
#endif
#ifdef MPG123_ENC_UNSIGNED_24
"U24" ENDIAN_POSTFIX,
#endif
#ifdef MPG123_ENC_SIGNED_32
"S32" ENDIAN_POSTFIX,
#endif
#ifdef MPG123_ENC_UNSIGNED_32
"U32" ENDIAN_POSTFIX,
#endif
#ifdef MPG123_ENC_FLOAT_32
"F32" ENDIAN_POSTFIX,
#endif
NULL
};
mpg123_rates (&rates_list, &num);
g_string_append (s, "rate = (int) { ");
for (i = 0; i < num; ++i) {
g_string_append_printf (s, "%s%lu", (i > 0) ? ", " : "", rates_list[i]);
}
g_string_append (s, "}, ");
format_string = g_strjoinv (", ", supported_formats);
caps_string =
g_strjoin (NULL, src_caps_begin, format_string, src_caps_end, NULL);
g_string_append (s, "channels = (int) [ 1, 2 ], ");
g_string_append (s, "layout = (string) interleaved");
src_caps = gst_caps_from_string (caps_string);
src_template =
gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
gst_caps_ref (src_caps));
src_template = gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
gst_caps_from_string (s->str));
g_free (format_string);
g_free (caps_string);
g_string_free (s, TRUE);
}
gst_element_class_add_pad_template (element_class,
@ -504,44 +512,30 @@ gst_mpg123_audio_dec_set_format (GstAudioDecoder * dec, GstCaps * incoming_caps)
}
switch (format) {
#ifdef MPG123_ENC_SIGNED_16
case GST_AUDIO_FORMAT_S16:
encoding = MPG123_ENC_SIGNED_16;
break;
#endif
#ifdef MPG123_ENC_SIGNED_24
case GST_AUDIO_FORMAT_S24:
encoding = MPG123_ENC_SIGNED_24;
break;
#endif
#ifdef MPG123_ENC_SIGNED_32
case GST_AUDIO_FORMAT_S32:
encoding = MPG123_ENC_SIGNED_32;
break;
#endif
#ifdef MPG123_ENC_UNSIGNED_16
case GST_AUDIO_FORMAT_U16:
encoding = MPG123_ENC_UNSIGNED_16;
break;
#endif
#ifdef MPG123_ENC_UNSIGNED_24
case GST_AUDIO_FORMAT_U24:
encoding = MPG123_ENC_UNSIGNED_24;
break;
#endif
#ifdef MPG123_ENC_UNSIGNED_32
case GST_AUDIO_FORMAT_U32:
encoding = MPG123_ENC_UNSIGNED_32;
break;
#endif
#ifdef MPG123_ENC_FLOAT_32
case GST_AUDIO_FORMAT_F32:
encoding = MPG123_ENC_FLOAT_32;
break;
#endif
default:
GST_DEBUG_OBJECT (dec,
"Format %s in srccaps is not supported by mpg123", format_str);
"Format %s in srccaps is not supported", format_str);
continue;
}