Commit 46d86d80 authored by Wim Taymans's avatar Wim Taymans
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gst-libs/gst/audio/gstringbuffer.c: Calculate correct silence samples so we...

gst-libs/gst/audio/gstringbuffer.c: Calculate correct silence samples so we don't fill our ringbuffer with noise.

Original commit message from CVS:
* gst-libs/gst/audio/gstringbuffer.c: (build_linear_format),
(gst_ring_buffer_debug_spec_caps), (gst_ring_buffer_parse_caps):
Calculate correct silence samples so we don't fill our ringbuffer
with noise.
parent 7b88e031
2006-07-12 Wim Taymans <wim@fluendo.com>
* gst-libs/gst/audio/gstringbuffer.c: (build_linear_format),
(gst_ring_buffer_debug_spec_caps), (gst_ring_buffer_parse_caps):
Calculate correct silence samples so we don't fill our ringbuffer
with noise.
2006-07-12 Edward Hervey <edward@fluendo.com>
 
* ext/vorbis/vorbisdec.c: (gst_vorbis_dec_init),
......
......@@ -130,55 +130,61 @@ gst_ring_buffer_finalize (GObject * object)
G_OBJECT_CLASS (parent_class)->finalize (G_OBJECT (ringbuffer));
}
static const int linear_formats[4 * 2 * 2] = {
GST_S8,
GST_S8,
GST_U8,
GST_U8,
GST_S16_LE,
GST_S16_BE,
GST_U16_LE,
GST_U16_BE,
GST_S24_LE,
GST_S24_BE,
GST_U24_LE,
GST_U24_BE,
GST_S32_LE,
GST_S32_BE,
GST_U32_LE,
GST_U32_BE
typedef struct
{
GstBufferFormat format;
guint8 silence[4];
} FormatDef;
static const FormatDef linear_defs[4 * 2 * 2] = {
{GST_S8, {0x00, 0x00, 0x00, 0x00}},
{GST_S8, {0x00, 0x00, 0x00, 0x00}},
{GST_U8, {0x80, 0x80, 0x80, 0x80}},
{GST_U8, {0x80, 0x80, 0x80, 0x80}},
{GST_S16_LE, {0x00, 0x00, 0x00, 0x00}},
{GST_S16_BE, {0x00, 0x00, 0x00, 0x00}},
{GST_U16_LE, {0x00, 0x80, 0x00, 0x80}},
{GST_U16_BE, {0x80, 0x00, 0x80, 0x00}},
{GST_S24_LE, {0x00, 0x00, 0x00, 0x00}},
{GST_S24_BE, {0x00, 0x00, 0x00, 0x00}},
{GST_U24_LE, {0x00, 0x00, 0x80, 0x00}},
{GST_U24_BE, {0x80, 0x00, 0x00, 0x00}},
{GST_S32_LE, {0x00, 0x00, 0x00, 0x00}},
{GST_S32_BE, {0x00, 0x00, 0x00, 0x00}},
{GST_U32_LE, {0x00, 0x00, 0x00, 0x80}},
{GST_U32_BE, {0x80, 0x00, 0x00, 0x00}}
};
static const int linear24_formats[3 * 2 * 2] = {
GST_S24_3LE,
GST_S24_3BE,
GST_U24_3LE,
GST_U24_3BE,
GST_S20_3LE,
GST_S20_3BE,
GST_U20_3LE,
GST_U20_3BE,
GST_S18_3LE,
GST_S18_3BE,
GST_U18_3LE,
GST_U18_3BE,
static const FormatDef linear24_defs[3 * 2 * 2] = {
{GST_S24_3LE, {0x00, 0x00, 0x00, 0x00}},
{GST_S24_3BE, {0x00, 0x00, 0x00, 0x00}},
{GST_U24_3LE, {0x00, 0x00, 0x80, 0x00}},
{GST_U24_3BE, {0x80, 0x00, 0x00, 0x00}},
{GST_S20_3LE, {0x00, 0x00, 0x00, 0x00}},
{GST_S20_3BE, {0x00, 0x00, 0x00, 0x00}},
{GST_U20_3LE, {0x00, 0x00, 0x08, 0x00}},
{GST_U20_3BE, {0x08, 0x00, 0x00, 0x00}},
{GST_S18_3LE, {0x00, 0x00, 0x00, 0x00}},
{GST_S18_3BE, {0x00, 0x00, 0x00, 0x00}},
{GST_U18_3LE, {0x00, 0x00, 0x02, 0x00}},
{GST_U18_3BE, {0x02, 0x00, 0x00, 0x00}}
};
static GstBufferFormat
static const FormatDef *
build_linear_format (int depth, int width, int unsignd, int big_endian)
{
const gint *formats;
const FormatDef *formats;
if (width == 24) {
switch (depth) {
case 24:
formats = &linear24_formats[0];
formats = &linear24_defs[0];
break;
case 20:
formats = &linear24_formats[4];
formats = &linear24_defs[4];
break;
case 18:
formats = &linear24_formats[8];
formats = &linear24_defs[8];
break;
default:
return GST_UNKNOWN;
......@@ -186,16 +192,16 @@ build_linear_format (int depth, int width, int unsignd, int big_endian)
} else {
switch (depth) {
case 8:
formats = &linear_formats[0];
formats = &linear_defs[0];
break;
case 16:
formats = &linear_formats[4];
formats = &linear_defs[4];
break;
case 24:
formats = &linear_formats[8];
formats = &linear_defs[8];
break;
case 32:
formats = &linear_formats[12];
formats = &linear_defs[12];
break;
default:
return GST_UNKNOWN;
......@@ -205,7 +211,8 @@ build_linear_format (int depth, int width, int unsignd, int big_endian)
formats += 2;
if (big_endian)
formats += 1;
return (GstBufferFormat) * formats;
return formats;
}
/**
......@@ -217,6 +224,8 @@ build_linear_format (int depth, int width, int unsignd, int big_endian)
void
gst_ring_buffer_debug_spec_caps (GstRingBufferSpec * spec)
{
gint i, bytes;
GST_DEBUG ("spec caps: %p %" GST_PTR_FORMAT, spec->caps, spec->caps);
GST_DEBUG ("parsed caps: type: %d", spec->type);
GST_DEBUG ("parsed caps: format: %d", spec->format);
......@@ -227,6 +236,10 @@ gst_ring_buffer_debug_spec_caps (GstRingBufferSpec * spec)
GST_DEBUG ("parsed caps: rate: %d", spec->rate);
GST_DEBUG ("parsed caps: channels: %d", spec->channels);
GST_DEBUG ("parsed caps: sample bytes: %d", spec->bytes_per_sample);
bytes = (spec->width >> 3) * spec->channels;
for (i = 0; i < bytes; i++) {
GST_DEBUG ("silence byte %d: %02x", i, spec->silence_sample[i]);
}
}
/**
......@@ -270,8 +283,15 @@ gst_ring_buffer_parse_caps (GstRingBufferSpec * spec, GstCaps * caps)
/* we have to differentiate between int and float formats */
mimetype = gst_structure_get_name (structure);
/* get rate and channels */
if (!(gst_structure_get_int (structure, "rate", &spec->rate) &&
gst_structure_get_int (structure, "channels", &spec->channels)))
goto parse_error;
if (!strncmp (mimetype, "audio/x-raw-int", 15)) {
gint endianness;
const FormatDef *def;
gint i, j, bytes;
spec->type = GST_BUFTYPE_LINEAR;
......@@ -291,9 +311,18 @@ gst_ring_buffer_parse_caps (GstRingBufferSpec * spec, GstCaps * caps)
spec->bigend = endianness == G_LITTLE_ENDIAN ? FALSE : TRUE;
spec->format =
build_linear_format (spec->depth, spec->width, spec->sign ? 0 : 1,
def = build_linear_format (spec->depth, spec->width, spec->sign ? 0 : 1,
spec->bigend ? 1 : 0);
spec->format = def->format;
bytes = spec->width >> 3;
for (i = 0; i < spec->channels; i++) {
for (j = 0; j < bytes; j++) {
spec->silence_sample[i * bytes + j] = def->silence[j];
}
}
} else if (!strncmp (mimetype, "audio/x-raw-float", 17)) {
spec->type = GST_BUFTYPE_FLOAT;
......@@ -329,11 +358,6 @@ gst_ring_buffer_parse_caps (GstRingBufferSpec * spec, GstCaps * caps)
goto parse_error;
}
/* get rate and channels */
if (!(gst_structure_get_int (structure, "rate", &spec->rate) &&
gst_structure_get_int (structure, "channels", &spec->channels)))
goto parse_error;
spec->bytes_per_sample = (spec->width >> 3) * spec->channels;
gst_caps_replace (&spec->caps, caps);
......
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