gstreamer/gst/rawparse/gstaudioparse.c
2012-03-20 20:21:37 +01:00

404 lines
12 KiB
C

/* GStreamer
* Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
*
* gstaudioparse.c:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-audioparse
*
* Converts a byte stream into audio frames.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
/* FIXME 0.11: suppress warnings for deprecated API such as g_value_array stuff
* for now with newer GLib versions (>= 2.31.0) */
#define GLIB_DISABLE_DEPRECATION_WARNINGS
#include "gstaudioparse.h"
#include <string.h>
typedef enum
{
GST_AUDIO_PARSE_FORMAT_RAW,
GST_AUDIO_PARSE_FORMAT_MULAW,
GST_AUDIO_PARSE_FORMAT_ALAW
} GstAudioParseFormat;
typedef enum
{
GST_AUDIO_PARSE_ENDIANNESS_LITTLE = 1234,
GST_AUDIO_PARSE_ENDIANNESS_BIG = 4321
} GstAudioParseEndianness;
static void gst_audio_parse_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_audio_parse_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_audio_parse_finalize (GObject * object);
static GstCaps *gst_audio_parse_get_caps (GstRawParse * rp);
static void gst_audio_parse_update_frame_size (GstAudioParse * ap);
GST_DEBUG_CATEGORY_STATIC (gst_audio_parse_debug);
#define GST_CAT_DEFAULT gst_audio_parse_debug
enum
{
PROP_0,
PROP_FORMAT,
PROP_RAW_FORMAT,
PROP_RATE,
PROP_CHANNELS,
PROP_INTERLEAVED,
PROP_CHANNEL_POSITIONS
};
#define GST_AUDIO_PARSE_FORMAT (gst_audio_parse_format_get_type ())
static GType
gst_audio_parse_format_get_type (void)
{
static GType audio_parse_format_type = 0;
static const GEnumValue format_types[] = {
{GST_AUDIO_PARSE_FORMAT_RAW, "Raw", "raw"},
{GST_AUDIO_PARSE_FORMAT_ALAW, "A-Law", "alaw"},
{GST_AUDIO_PARSE_FORMAT_MULAW, "\302\265-Law", "mulaw"},
{0, NULL, NULL}
};
if (!audio_parse_format_type) {
audio_parse_format_type =
g_enum_register_static ("GstAudioParseFormat", format_types);
}
return audio_parse_format_type;
}
#define gst_audio_parse_parent_class parent_class
G_DEFINE_TYPE (GstAudioParse, gst_audio_parse, GST_TYPE_RAW_PARSE);
static void
gst_audio_parse_class_init (GstAudioParseClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GstRawParseClass *rp_class = GST_RAW_PARSE_CLASS (klass);
GstCaps *caps;
gobject_class->set_property = gst_audio_parse_set_property;
gobject_class->get_property = gst_audio_parse_get_property;
gobject_class->finalize = gst_audio_parse_finalize;
rp_class->get_caps = gst_audio_parse_get_caps;
g_object_class_install_property (gobject_class, PROP_FORMAT,
g_param_spec_enum ("format", "Format",
"Format of audio samples in raw stream", GST_AUDIO_PARSE_FORMAT,
GST_AUDIO_PARSE_FORMAT_RAW,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_RAW_FORMAT,
g_param_spec_enum ("raw-format", "Raw Format",
"Format of audio samples in raw stream", GST_TYPE_AUDIO_FORMAT,
GST_AUDIO_FORMAT_S16, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_RATE,
g_param_spec_int ("rate", "Rate", "Rate of audio samples in raw stream",
1, INT_MAX, 44100, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CHANNELS,
g_param_spec_int ("channels", "Channels",
"Number of channels in raw stream", 1, 64, 2,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_INTERLEAVED,
g_param_spec_boolean ("interleaved", "Interleaved Layout",
"True if audio has interleaved layout", TRUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CHANNEL_POSITIONS,
g_param_spec_value_array ("channel-positions", "Channel positions",
"Channel positions used on the output",
g_param_spec_enum ("channel-position", "Channel position",
"Channel position of the n-th input",
GST_TYPE_AUDIO_CHANNEL_POSITION,
GST_AUDIO_CHANNEL_POSITION_NONE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS),
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_details_simple (gstelement_class, "Audio Parse",
"Filter/Audio",
"Converts stream into audio frames",
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
caps = gst_caps_from_string (GST_AUDIO_CAPS_MAKE (GST_AUDIO_FORMATS_ALL)
", layout = (string) { interleaved, non-interleaved }; "
"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);
gst_caps_unref (caps);
GST_DEBUG_CATEGORY_INIT (gst_audio_parse_debug, "audioparse", 0,
"audioparse element");
}
static void
gst_audio_parse_init (GstAudioParse * ap)
{
ap->format = GST_AUDIO_PARSE_FORMAT_RAW;
ap->raw_format = GST_AUDIO_FORMAT_S16;
ap->channels = 2;
ap->interleaved = TRUE;
gst_audio_parse_update_frame_size (ap);
gst_raw_parse_set_fps (GST_RAW_PARSE (ap), 44100, 1);
}
static void
gst_audio_parse_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAudioParse *ap = GST_AUDIO_PARSE (object);
g_return_if_fail (!gst_raw_parse_is_negotiated (GST_RAW_PARSE (ap)));
switch (prop_id) {
case PROP_FORMAT:
ap->format = g_value_get_enum (value);
break;
case PROP_RAW_FORMAT:
ap->raw_format = g_value_get_enum (value);
break;
case PROP_RATE:
gst_raw_parse_set_fps (GST_RAW_PARSE (ap), g_value_get_int (value), 1);
break;
case PROP_CHANNELS:
ap->channels = g_value_get_int (value);
break;
case PROP_INTERLEAVED:
ap->interleaved = g_value_get_boolean (value);
break;
case PROP_CHANNEL_POSITIONS:
if (ap->channel_positions)
g_value_array_free (ap->channel_positions);
ap->channel_positions = g_value_dup_boxed (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
gst_audio_parse_update_frame_size (ap);
}
static void
gst_audio_parse_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstAudioParse *ap = GST_AUDIO_PARSE (object);
switch (prop_id) {
case PROP_FORMAT:
g_value_set_enum (value, ap->format);
break;
case PROP_RAW_FORMAT:
g_value_set_enum (value, ap->raw_format);
break;
case PROP_RATE:{
gint fps_n, fps_d;
gst_raw_parse_get_fps (GST_RAW_PARSE (ap), &fps_n, &fps_d);
g_value_set_int (value, fps_n);
break;
}
case PROP_CHANNELS:
g_value_set_int (value, ap->channels);
break;
case PROP_INTERLEAVED:
g_value_set_boolean (value, ap->interleaved);
break;
case PROP_CHANNEL_POSITIONS:
g_value_set_boxed (value, ap->channel_positions);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_audio_parse_finalize (GObject * object)
{
GstAudioParse *ap = GST_AUDIO_PARSE (object);
if (ap->channel_positions) {
g_value_array_free (ap->channel_positions);
ap->channel_positions = NULL;
}
g_free (ap->channel_pos);
g_free (ap->channel_order);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
void
gst_audio_parse_update_frame_size (GstAudioParse * ap)
{
gint framesize, width;
switch (ap->format) {
case GST_AUDIO_PARSE_FORMAT_ALAW:
case GST_AUDIO_PARSE_FORMAT_MULAW:
width = 8;
break;
case GST_AUDIO_PARSE_FORMAT_RAW:
default:
{
GstAudioInfo info;
gst_audio_info_init (&info);
/* rate, etc do not really matter here */
gst_audio_info_set_format (&info, ap->raw_format, 44100, ap->channels,
NULL);
width = GST_AUDIO_INFO_WIDTH (&info);
break;
}
}
framesize = (width / 8) * ap->channels;
gst_raw_parse_set_framesize (GST_RAW_PARSE (ap), framesize);
}
static GstAudioChannelPosition *
gst_audio_parse_get_channel_positions (GValueArray * positions)
{
gint i;
guint channels;
GstAudioChannelPosition *pos;
channels = positions->n_values;
pos = g_new (GstAudioChannelPosition, positions->n_values);
for (i = 0; i < channels; i++) {
GValue *v = g_value_array_get_nth (positions, i);
pos[i] = g_value_get_enum (v);
}
return pos;
}
static void
gst_audio_parse_setup_channel_positions (GstAudioParse * ap)
{
GstAudioChannelPosition *pos, *to;
g_free (ap->channel_pos);
g_free (ap->channel_order);
ap->channel_pos = NULL;
ap->channel_order = NULL;
if (!ap->channel_positions) {
GST_DEBUG_OBJECT (ap, "no channel positions");
/* implicit mapping for 1- and 2-channel audio is okay */
/* will come up with one in other cases also */
return;
}
pos = gst_audio_parse_get_channel_positions (ap->channel_positions);
if (ap->channels != ap->channel_positions->n_values ||
!gst_audio_check_valid_channel_positions (pos, ap->channels, FALSE)) {
GST_DEBUG_OBJECT (ap, "invalid channel position");
g_free (pos);
return;
}
/* ok, got something we can work with now */
to = g_new (GstAudioChannelPosition, ap->channels);
memcpy (to, pos, ap->channels * sizeof (to[0]));
gst_audio_channel_positions_to_valid_order (to, ap->channels);
ap->channel_pos = pos;
ap->channel_order = to;
}
static GstCaps *
gst_audio_parse_get_caps (GstRawParse * rp)
{
GstAudioParse *ap = GST_AUDIO_PARSE (rp);
GstCaps *caps, *ncaps;
GstAudioInfo info;
gint fps_n, fps_d;
const GValue *val;
gst_raw_parse_get_fps (rp, &fps_n, &fps_d);
gst_audio_parse_setup_channel_positions (ap);
/* yes, even when format not raw */
gst_audio_info_init (&info);
gst_audio_info_set_format (&info, ap->raw_format, fps_n, ap->channels,
ap->channel_order);
info.layout = ap->interleaved ? GST_AUDIO_LAYOUT_INTERLEAVED :
GST_AUDIO_LAYOUT_NON_INTERLEAVED;
caps = gst_audio_info_to_caps (&info);
switch (ap->format) {
case GST_AUDIO_PARSE_FORMAT_RAW:
break;
case GST_AUDIO_PARSE_FORMAT_ALAW:
ncaps = gst_caps_new_simple ("audio/x-alaw",
"rate", G_TYPE_INT, fps_n,
"channels", G_TYPE_INT, ap->channels, NULL);
/* pick mask stuff from faked raw format */
val = gst_structure_get_value (gst_caps_get_structure (caps, 0),
"channel-mask");
if (val)
gst_caps_set_value (ncaps, "channel-mask", val);
gst_caps_unref (caps);
caps = ncaps;
break;
case GST_AUDIO_PARSE_FORMAT_MULAW:
ncaps = gst_caps_new_simple ("audio/x-mulaw",
"rate", G_TYPE_INT, fps_n,
"channels", G_TYPE_INT, ap->channels, NULL);
/* pick mask stuff from faked raw format */
val = gst_structure_get_value (gst_caps_get_structure (caps, 0),
"channel-mask");
if (val)
gst_caps_set_value (ncaps, "channel-mask", val);
gst_caps_unref (caps);
caps = ncaps;
break;
default:
caps = gst_caps_new_empty ();
GST_ERROR_OBJECT (rp, "unexpected format %d", ap->format);
break;
}
return caps;
}