|
Packit |
971217 |
|
|
Packit |
971217 |
<html>
|
|
Packit |
971217 |
<head>
|
|
Packit |
971217 |
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
|
|
Packit |
971217 |
<title>GstAudioDownmixMeta: GStreamer Base Plugins 1.0 Library Reference Manual</title>
|
|
Packit |
971217 |
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
|
|
Packit |
971217 |
<link rel="home" href="index.html" title="GStreamer Base Plugins 1.0 Library Reference Manual">
|
|
Packit |
971217 |
<link rel="up" href="gstreamer-audio.html" title="Audio Library">
|
|
Packit |
971217 |
<link rel="prev" href="gst-plugins-base-libs-GstAudio.html" title="GstAudio">
|
|
Packit |
971217 |
<link rel="next" href="GstAudioAggregator.html" title="GstAudioAggregator">
|
|
Packit |
971217 |
<meta name="generator" content="GTK-Doc V1.27 (XML mode)">
|
|
Packit |
971217 |
<link rel="stylesheet" href="style.css" type="text/css">
|
|
Packit |
971217 |
</head>
|
|
Packit |
971217 |
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Top |
|
|
Packit |
971217 |
Description
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
GstAudioDownmixMeta
|
|
Packit |
971217 |
GstAudioDownmixMeta — Buffer metadata for audio downmix matrix handling
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Functions
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
GstAudioDownmixMeta *
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_buffer_add_audio_downmix_meta ()
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
#define
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_buffer_get_audio_downmix_meta()
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
GstAudioDownmixMeta *
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_buffer_get_audio_downmix_meta_for_channels ()
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
GstAudioClippingMeta *
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_buffer_add_audio_clipping_meta ()
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
#define
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_buffer_get_audio_clipping_meta()
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Types and Values
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
struct
|
|
Packit |
971217 |
GstAudioDownmixMeta
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
struct
|
|
Packit |
971217 |
GstAudioClippingMeta
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Includes
|
|
Packit |
971217 |
#include <gst/audio/gstaudiometa.h>
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Description
|
|
Packit |
971217 |
GstAudioDownmixMeta defines an audio downmix matrix to be send along with
|
|
Packit |
971217 |
audio buffers. These functions in this module help to create and attach the
|
|
Packit |
971217 |
meta as well as extracting it.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Functions
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_buffer_add_audio_downmix_meta ()
|
|
Packit |
971217 |
GstAudioDownmixMeta *
|
|
Packit |
971217 |
gst_buffer_add_audio_downmix_meta (GstBuffer *buffer,
|
|
Packit |
971217 |
const GstAudioChannelPosition *from_position,
|
|
Packit |
971217 |
gint from_channels,
|
|
Packit |
971217 |
const GstAudioChannelPosition *to_position,
|
|
Packit |
971217 |
gint to_channels,
|
|
Packit |
971217 |
const gfloat **matrix);
|
|
Packit |
971217 |
Attaches GstAudioDownmixMeta metadata to buffer
|
|
Packit |
971217 |
with the given parameters.
|
|
Packit |
971217 |
matrix
|
|
Packit |
971217 |
is an two-dimensional array of to_channels
|
|
Packit |
971217 |
times from_channels
|
|
Packit |
971217 |
|
|
Packit |
971217 |
coefficients, i.e. the i-th output channels is constructed by multiplicating
|
|
Packit |
971217 |
the input channels with the coefficients in matrix
|
|
Packit |
971217 |
[i] and taking the sum
|
|
Packit |
971217 |
of the results.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
buffer
|
|
Packit |
971217 |
a GstBuffer
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
from_position
|
|
Packit |
971217 |
the channel positions
|
|
Packit |
971217 |
of the source.
|
|
Packit |
971217 |
[array length=from_channels]
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
from_channels
|
|
Packit |
971217 |
The number of channels of the source
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
to_position
|
|
Packit |
971217 |
the channel positions of
|
|
Packit |
971217 |
the destination.
|
|
Packit |
971217 |
[array length=to_channels]
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
to_channels
|
|
Packit |
971217 |
The number of channels of the destination
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
matrix
|
|
Packit |
971217 |
The matrix coefficients.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
the GstAudioDownmixMeta on buffer
|
|
Packit |
971217 |
.
|
|
Packit |
971217 |
[transfer none]
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_buffer_get_audio_downmix_meta()
|
|
Packit |
971217 |
#define gst_buffer_get_audio_downmix_meta(b) ((GstAudioDownmixMeta*)gst_buffer_get_meta((b), GST_AUDIO_DOWNMIX_META_API_TYPE))
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_buffer_get_audio_downmix_meta_for_channels ()
|
|
Packit |
971217 |
GstAudioDownmixMeta *
|
|
Packit |
971217 |
gst_buffer_get_audio_downmix_meta_for_channels
|
|
Packit |
971217 |
(GstBuffer *buffer,
|
|
Packit |
971217 |
const GstAudioChannelPosition *to_position,
|
|
Packit |
971217 |
gint to_channels);
|
|
Packit |
971217 |
Find the GstAudioDownmixMeta on buffer
|
|
Packit |
971217 |
for the given destination
|
|
Packit |
971217 |
channel positions.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
buffer
|
|
Packit |
971217 |
a GstBuffer
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
to_position
|
|
Packit |
971217 |
the channel positions of
|
|
Packit |
971217 |
the destination.
|
|
Packit |
971217 |
[array length=to_channels]
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
to_channels
|
|
Packit |
971217 |
The number of channels of the destination
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
the GstAudioDownmixMeta on buffer
|
|
Packit |
971217 |
.
|
|
Packit |
971217 |
[transfer none]
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_buffer_add_audio_clipping_meta ()
|
|
Packit |
971217 |
GstAudioClippingMeta *
|
|
Packit |
971217 |
gst_buffer_add_audio_clipping_meta (GstBuffer *buffer,
|
|
Packit |
971217 |
GstFormat format,
|
|
Packit |
971217 |
guint64 start,
|
|
Packit |
971217 |
guint64 end);
|
|
Packit |
971217 |
Attaches GstAudioClippingMeta metadata to buffer
|
|
Packit |
971217 |
with the given parameters.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
buffer
|
|
Packit |
971217 |
a GstBuffer
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
format
|
|
Packit |
971217 |
GstFormat of start
|
|
Packit |
971217 |
and stop
|
|
Packit |
971217 |
, GST_FORMAT_DEFAULT is samples
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
start
|
|
Packit |
971217 |
Amount of audio to clip from start of buffer
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
end
|
|
Packit |
971217 |
Amount of to clip from end of buffer
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
the GstAudioClippingMeta on buffer
|
|
Packit |
971217 |
.
|
|
Packit |
971217 |
[transfer none]
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Since: 1.8
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_buffer_get_audio_clipping_meta()
|
|
Packit |
971217 |
#define gst_buffer_get_audio_clipping_meta(b) ((GstAudioClippingMeta*)gst_buffer_get_meta((b), GST_AUDIO_CLIPPING_META_API_TYPE))
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Types and Values
|
|
Packit |
971217 |
|
|
Packit |
971217 |
struct GstAudioDownmixMeta
|
|
Packit |
971217 |
struct GstAudioDownmixMeta {
|
|
Packit |
971217 |
GstMeta meta;
|
|
Packit |
971217 |
|
|
Packit |
971217 |
GstAudioChannelPosition *from_position;
|
|
Packit |
971217 |
GstAudioChannelPosition *to_position;
|
|
Packit |
971217 |
gint from_channels, to_channels;
|
|
Packit |
971217 |
gfloat **matrix;
|
|
Packit |
971217 |
};
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Extra buffer metadata describing audio downmixing matrix. This metadata is
|
|
Packit |
971217 |
attached to audio buffers and contains a matrix to downmix the buffer number
|
|
Packit |
971217 |
of channels to channels
|
|
Packit |
971217 |
.
|
|
Packit |
971217 |
matrix
|
|
Packit |
971217 |
is an two-dimensional array of to_channels
|
|
Packit |
971217 |
times from_channels
|
|
Packit |
971217 |
|
|
Packit |
971217 |
coefficients, i.e. the i-th output channels is constructed by multiplicating
|
|
Packit |
971217 |
the input channels with the coefficients in matrix
|
|
Packit |
971217 |
[i] and taking the sum
|
|
Packit |
971217 |
of the results.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Members
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
GstMeta meta;
|
|
Packit |
971217 |
parent GstMeta
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
GstAudioChannelPosition *from_position;
|
|
Packit |
971217 |
the channel positions of the source
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
GstAudioChannelPosition *to_position;
|
|
Packit |
971217 |
the channel positions of the destination
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gint from_channels;
|
|
Packit |
971217 |
the number of channels of the source
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gint to_channels;
|
|
Packit |
971217 |
the number of channels of the destination
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gfloat **matrix;
|
|
Packit |
971217 |
the matrix coefficients.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
struct GstAudioClippingMeta
|
|
Packit |
971217 |
struct GstAudioClippingMeta {
|
|
Packit |
971217 |
GstMeta meta;
|
|
Packit |
971217 |
|
|
Packit |
971217 |
GstFormat format;
|
|
Packit |
971217 |
guint64 start;
|
|
Packit |
971217 |
guint64 end;
|
|
Packit |
971217 |
};
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Extra buffer metadata describing how much audio has to be clipped from
|
|
Packit |
971217 |
the start or end of a buffer. This is used for compressed formats, where
|
|
Packit |
971217 |
the first frame usually has some additional samples due to encoder and
|
|
Packit |
971217 |
decoder delays, and the last frame usually has some additional samples to
|
|
Packit |
971217 |
be able to fill the complete last frame.
|
|
Packit |
971217 |
This is used to ensure that decoded data in the end has the same amount of
|
|
Packit |
971217 |
samples, and multiply decoded streams can be gaplessly concatenated.
|
|
Packit |
971217 |
Note: If clipping of the start is done by adjusting the segment, this meta
|
|
Packit |
971217 |
has to be dropped from buffers as otherwise clipping could happen twice.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Members
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
GstMeta meta;
|
|
Packit |
971217 |
parent GstMeta
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
GstFormat format;
|
|
Packit |
971217 |
GstFormat of start
|
|
Packit |
971217 |
and stop
|
|
Packit |
971217 |
, GST_FORMAT_DEFAULT is samples
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
guint64 start;
|
|
Packit |
971217 |
Amount of audio to clip from start of buffer
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
guint64 end;
|
|
Packit |
971217 |
Amount of to clip from end of buffer
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Since: 1.8
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Generated by GTK-Doc V1.27
|
|
Packit |
971217 |
</body>
|
|
Packit |
971217 |
</html>
|