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oss: make sure 16-bit formats are before 8-bit formats in probed caps

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Probe supported formats in order of desirability rather than in
what order they may happen to be in the formats bitmask. Fixes
accidentally exposure of 8-bit formats in caps before 16-bit formats
(in case where U16 was not supported S8 might be listed before S16).

https://bugzilla.gnome.org/show_bug.cgi?id=706884
This commit is contained in:
Tim-Philipp Müller 2014-06-13 09:45:28 +01:00
parent 0fb59dbdba
commit ffcb884551
1 changed files with 47 additions and 53 deletions
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24
sys/oss/gstosshelper.c
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@ -81,34 +81,29 @@ static int gst_oss_helper_rate_int_compare (gconstpointer a, gconstpointer b);
GstCaps *
gst_oss_helper_probe_caps (gint fd)
{
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
const guint probe_formats[] = { AFMT_S16_LE, AFMT_U16_LE, AFMT_U8, AFMT_S8 };
#else
const guint probe_formats[] = { AFMT_S16_BE, AFMT_U16_BE, AFMT_U8, AFMT_S8 };
#endif
GstOssProbe *probe;
int i;
int i, f;
gboolean ret;
GstStructure *structure;
unsigned int format_bit;
unsigned int format_mask;
GstCaps *caps;
/* FIXME test make sure we're not currently playing */
/* FIXME test both mono and stereo */
format_mask = AFMT_U8 | AFMT_S8;
if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
format_mask |= AFMT_S16_LE | AFMT_U16_LE;
else
format_mask |= AFMT_S16_BE | AFMT_U16_BE;
caps = gst_caps_new_empty ();
/* assume that the most significant bit of format_mask is 0 */
for (format_bit = 1 << 31; format_bit > 0; format_bit >>= 1) {
if (format_bit & format_mask) {
for (f = 0; f < G_N_ELEMENTS (probe_formats); ++f) {
GValue rate_value = { 0 };
probe = g_new0 (GstOssProbe, 1);
probe->fd = fd;
probe->format = format_bit;
probe->format = probe_formats[f];
/* FIXME: this is not working for all cards, see bug #518474 */
probe->n_channels = 2;
@ -143,14 +138,13 @@ gst_oss_helper_probe_caps (gint fd)
g_array_free (probe->rates, TRUE);
g_free (probe);
structure = gst_oss_helper_get_format_structure (format_bit);
structure = gst_oss_helper_get_format_structure (probe_formats[f]);
gst_structure_set (structure, "channels", GST_TYPE_INT_RANGE, 1, 2, NULL);
gst_structure_set_value (structure, "rate", &rate_value);
g_value_unset (&rate_value);
gst_caps_append_structure (caps, structure);
}
}
if (gst_caps_is_empty (caps)) {
/* fixme: make user-visible */