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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>GstAudioEncoder: GStreamer Base Plugins 1.0 Library Reference Manual</title>
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<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
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<link rel="home" href="index.html" title="GStreamer Base Plugins 1.0 Library Reference Manual">
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<link rel="up" href="gstreamer-audio.html" title="Audio Library">
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<link rel="prev" href="GstAudioDecoder.html" title="GstAudioDecoder">
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<link rel="next" href="GstAudioFilter.html" title="GstAudioFilter">
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<meta name="generator" content="GTK-Doc V1.27 (XML mode)">
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<link rel="stylesheet" href="style.css" type="text/css">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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Top |
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Description |
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Object Hierarchy |
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Implemented Interfaces |
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Properties
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GstAudioEncoder
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GstAudioEncoder — Base class for audio encoders
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Functions
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#define
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GST_AUDIO_ENCODER_SINK_PAD()
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#define
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GST_AUDIO_ENCODER_SRC_PAD()
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#define
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GST_AUDIO_ENCODER_INPUT_SEGMENT()
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#define
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GST_AUDIO_ENCODER_OUTPUT_SEGMENT()
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#define
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GST_AUDIO_ENCODER_STREAM_LOCK()
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#define
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GST_AUDIO_ENCODER_STREAM_UNLOCK()
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GstFlowReturn
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gst_audio_encoder_finish_frame ()
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GstBuffer *
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gst_audio_encoder_allocate_output_buffer ()
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void
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gst_audio_encoder_get_allocator ()
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gboolean
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gst_audio_encoder_set_output_format ()
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gboolean
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gst_audio_encoder_negotiate ()
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GstAudioInfo *
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gst_audio_encoder_get_audio_info ()
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gboolean
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gst_audio_encoder_get_drainable ()
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gint
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gst_audio_encoder_get_frame_max ()
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gint
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gst_audio_encoder_get_frame_samples_min ()
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gint
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gst_audio_encoder_get_frame_samples_max ()
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gboolean
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gst_audio_encoder_get_hard_min ()
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gboolean
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gst_audio_encoder_get_hard_resync ()
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void
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gst_audio_encoder_get_latency ()
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gint
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gst_audio_encoder_get_lookahead ()
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gboolean
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gst_audio_encoder_get_mark_granule ()
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gboolean
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gst_audio_encoder_get_perfect_timestamp ()
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GstClockTime
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gst_audio_encoder_get_tolerance ()
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GstCaps *
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gst_audio_encoder_proxy_getcaps ()
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void
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gst_audio_encoder_set_drainable ()
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void
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gst_audio_encoder_set_frame_max ()
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void
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gst_audio_encoder_set_frame_samples_min ()
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void
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gst_audio_encoder_set_frame_samples_max ()
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void
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gst_audio_encoder_set_hard_min ()
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void
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gst_audio_encoder_set_hard_resync ()
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void
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gst_audio_encoder_set_headers ()
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void
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gst_audio_encoder_set_latency ()
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void
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gst_audio_encoder_set_lookahead ()
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void
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gst_audio_encoder_set_mark_granule ()
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void
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gst_audio_encoder_set_perfect_timestamp ()
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void
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gst_audio_encoder_set_tolerance ()
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void
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gst_audio_encoder_set_allocation_caps ()
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void
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gst_audio_encoder_merge_tags ()
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Properties
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gboolean
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hard-resync
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Read / Write
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gboolean
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mark-granule
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Read
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gboolean
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perfect-timestamp
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Read / Write
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gint64
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tolerance
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Read / Write
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Types and Values
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struct
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GstAudioEncoder
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struct
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GstAudioEncoderClass
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#define
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GST_AUDIO_ENCODER_SINK_NAME
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#define
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GST_AUDIO_ENCODER_SRC_NAME
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Object Hierarchy
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GObject
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╰── GInitiallyUnowned
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╰── GstObject
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╰── GstElement
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╰── GstAudioEncoder
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Implemented Interfaces
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GstAudioEncoder implements
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GstPreset.
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Includes
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#include <gst/audio/gstaudioencoder.h>
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Description
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This base class is for audio encoders turning raw audio samples into
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encoded audio data.
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GstAudioEncoder and subclass should cooperate as follows.
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Configuration
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Initially, GstAudioEncoder calls start
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when the encoder element
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is activated, which allows subclass to perform any global setup.
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GstAudioEncoder calls set_format
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to inform subclass of the format
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of input audio data that it is about to receive. Subclass should
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setup for encoding and configure various base class parameters
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appropriately, notably those directing desired input data handling.
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While unlikely, it might be called more than once, if changing input
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parameters require reconfiguration.
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GstAudioEncoder calls stop
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at end of all processing.
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As of configuration stage, and throughout processing, GstAudioEncoder
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maintains various parameters that provide required context,
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e.g. describing the format of input audio data.
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Conversely, subclass can and should configure these context parameters
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to inform base class of its expectation w.r.t. buffer handling.
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Data processing
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Base class gathers input sample data (as directed by the context's
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frame_samples and frame_max) and provides this to subclass' handle_frame
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.
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If codec processing results in encoded data, subclass should call
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gst_audio_encoder_finish_frame() to have encoded data pushed
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downstream. Alternatively, it might also call
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gst_audio_encoder_finish_frame() (with a NULL buffer and some number of
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dropped samples) to indicate dropped (non-encoded) samples.
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Just prior to actually pushing a buffer downstream,
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it is passed to pre_push
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.
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During the parsing process GstAudioEncoderClass will handle both
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srcpad and sinkpad events. Sink events will be passed to subclass
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if event
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callback has been provided.
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Shutdown phase
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to inform the subclass that data
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parsing will be stopped.
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Subclass is responsible for providing pad template caps for
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source and sink pads. The pads need to be named "sink" and "src". It also
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needs to set the fixed caps on srcpad, when the format is ensured. This
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is typically when base class calls subclass' set_format
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function, though
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it might be delayed until calling gst_audio_encoder_finish_frame
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.
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In summary, above process should have subclass concentrating on
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codec data processing while leaving other matters to base class,
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such as most notably timestamp handling. While it may exert more control
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in this area (see e.g. pre_push
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), it is very much not recommended.
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In particular, base class will either favor tracking upstream timestamps
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(at the possible expense of jitter) or aim to arrange for a perfect stream of
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output timestamps, depending on “perfect-timestamp”.
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However, in the latter case, the input may not be so perfect or ideal, which
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is handled as follows. An input timestamp is compared with the expected
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timestamp as dictated by input sample stream and if the deviation is less
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than “tolerance”, the deviation is discarded.
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Otherwise, it is considered a discontuinity and subsequent output timestamp
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is resynced to the new position after performing configured discontinuity
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processing. In the non-perfect-timestamp case, an upstream variation
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exceeding tolerance only leads to marking DISCONT on subsequent outgoing
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(while timestamps are adjusted to upstream regardless of variation).
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While DISCONT is also marked in the perfect-timestamp case, this one
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optionally (see “hard-resync”)
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performs some additional steps, such as clipping of (early) input samples
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or draining all currently remaining input data, depending on the direction
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of the discontuinity.
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If perfect timestamps are arranged, it is also possible to request baseclass
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(usually set by subclass) to provide additional buffer metadata (in OFFSET
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and OFFSET_END) fields according to granule defined semantics currently
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needed by oggmux. Specifically, OFFSET is set to granulepos (= sample count
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including buffer) and OFFSET_END to corresponding timestamp (as determined
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by same sample count and sample rate).
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Things that subclass need to take care of:
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Provide pad templates
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Set source pad caps when appropriate
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Inform base class of buffer processing needs using context's
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frame_samples and frame_bytes.
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Set user-configurable properties to sane defaults for format and
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implementing codec at hand, e.g. those controlling timestamp behaviour
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and discontinuity processing.
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Accept data in handle_frame
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and provide encoded results to
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gst_audio_encoder_finish_frame().
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Functions
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GST_AUDIO_ENCODER_SINK_PAD()
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#define GST_AUDIO_ENCODER_SINK_PAD(obj) (GST_AUDIO_ENCODER_CAST (obj)->sinkpad)
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Gives the pointer to the sink GstPad object of the element.
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Parameters
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obj
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audio encoder instance
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GST_AUDIO_ENCODER_SRC_PAD()
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#define GST_AUDIO_ENCODER_SRC_PAD(obj) (GST_AUDIO_ENCODER_CAST (obj)->srcpad)
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Gives the pointer to the source GstPad object of the element.
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Parameters
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obj
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audio encoder instance
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GST_AUDIO_ENCODER_INPUT_SEGMENT()
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#define GST_AUDIO_ENCODER_INPUT_SEGMENT(obj) (GST_AUDIO_ENCODER_CAST (obj)->input_segment)
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Gives the input segment of the element.
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Parameters
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obj
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base parse instance
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GST_AUDIO_ENCODER_OUTPUT_SEGMENT()
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#define GST_AUDIO_ENCODER_OUTPUT_SEGMENT(obj) (GST_AUDIO_ENCODER_CAST (obj)->output_segment)
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Gives the output segment of the element.
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Parameters
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obj
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base parse instance
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GST_AUDIO_ENCODER_STREAM_LOCK()
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#define GST_AUDIO_ENCODER_STREAM_LOCK(enc) g_rec_mutex_lock (&GST_AUDIO_ENCODER (enc)->stream_lock)
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GST_AUDIO_ENCODER_STREAM_UNLOCK()
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#define GST_AUDIO_ENCODER_STREAM_UNLOCK(enc) g_rec_mutex_unlock (&GST_AUDIO_ENCODER (enc)->stream_lock)
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gst_audio_encoder_finish_frame ()
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GstFlowReturn
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gst_audio_encoder_finish_frame (GstAudioEncoder *enc,
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GstBuffer *buffer,
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gint samples);
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Collects encoded data and pushes encoded data downstream.
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Source pad caps must be set when this is called.
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If samples
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< 0, then best estimate is all samples provided to encoder
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(subclass) so far. buf
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may be NULL, in which case next number of samples
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are considered discarded, e.g. as a result of discontinuous transmission,
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and a discontinuity is marked.
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Note that samples received in gst_audio_encoder_handle_frame()
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may be invalidated by a call to this function.
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Parameters
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enc
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a GstAudioEncoder
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buffer
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encoded data
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samples
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number of samples (per channel) represented by encoded data
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Returns
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a GstFlowReturn that should be escalated to caller (of caller)
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gst_audio_encoder_allocate_output_buffer ()
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GstBuffer *
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gst_audio_encoder_allocate_output_buffer
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(GstAudioEncoder *enc,
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gsize size);
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Helper function that allocates a buffer to hold an encoded audio frame
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for enc
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's current output format.
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Parameters
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enc
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a GstAudioEncoder
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size
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size of the buffer
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Returns
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allocated buffer.
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[transfer full]
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gst_audio_encoder_get_allocator ()
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void
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gst_audio_encoder_get_allocator (GstAudioEncoder *enc,
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GstAllocator **allocator,
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GstAllocationParams *params);
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Lets GstAudioEncoder sub-classes to know the memory allocator
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used by the base class and its params
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.
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Unref the allocator
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after use it.
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Parameters
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enc
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a GstAudioEncoder
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allocator
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the GstAllocator
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used.
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[out][allow-none][transfer full]
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params
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the
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GstAllocatorParams of allocator
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.
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[out][allow-none][transfer full]
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gst_audio_encoder_set_output_format ()
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gboolean
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gst_audio_encoder_set_output_format (GstAudioEncoder *enc,
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GstCaps *caps);
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Configure output caps on the srcpad of enc
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.
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Parameters
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Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
caps
|
|
Packit |
971217 |
GstCaps.
|
|
Packit |
971217 |
[transfer none]
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
TRUE on success.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_negotiate ()
|
|
Packit |
971217 |
gboolean
|
|
Packit |
971217 |
gst_audio_encoder_negotiate (GstAudioEncoder *enc);
|
|
Packit |
971217 |
Negotiate with downstream elements to currently configured GstCaps.
|
|
Packit |
971217 |
Unmark GST_PAD_FLAG_NEED_RECONFIGURE in any case. But mark it again if
|
|
Packit |
971217 |
negotiate fails.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
TRUE if the negotiation succeeded, else FALSE.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_get_audio_info ()
|
|
Packit |
971217 |
GstAudioInfo *
|
|
Packit |
971217 |
gst_audio_encoder_get_audio_info (GstAudioEncoder *enc);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
a GstAudioInfo describing the input audio format
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_get_drainable ()
|
|
Packit |
971217 |
gboolean
|
|
Packit |
971217 |
gst_audio_encoder_get_drainable (GstAudioEncoder *enc);
|
|
Packit |
971217 |
Queries encoder drain handling.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
TRUE if drainable handling is enabled.
|
|
Packit |
971217 |
MT safe.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_get_frame_max ()
|
|
Packit |
971217 |
gint
|
|
Packit |
971217 |
gst_audio_encoder_get_frame_max (GstAudioEncoder *enc);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
currently configured maximum handled frames
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_get_frame_samples_min ()
|
|
Packit |
971217 |
gint
|
|
Packit |
971217 |
gst_audio_encoder_get_frame_samples_min
|
|
Packit |
971217 |
(GstAudioEncoder *enc);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
currently minimum requested samples per frame
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_get_frame_samples_max ()
|
|
Packit |
971217 |
gint
|
|
Packit |
971217 |
gst_audio_encoder_get_frame_samples_max
|
|
Packit |
971217 |
(GstAudioEncoder *enc);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
currently maximum requested samples per frame
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_get_hard_min ()
|
|
Packit |
971217 |
gboolean
|
|
Packit |
971217 |
gst_audio_encoder_get_hard_min (GstAudioEncoder *enc);
|
|
Packit |
971217 |
Queries encoder hard minimum handling.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
TRUE if hard minimum handling is enabled.
|
|
Packit |
971217 |
MT safe.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_get_hard_resync ()
|
|
Packit |
971217 |
gboolean
|
|
Packit |
971217 |
gst_audio_encoder_get_hard_resync (GstAudioEncoder *enc);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_get_latency ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_audio_encoder_get_latency (GstAudioEncoder *enc,
|
|
Packit |
971217 |
GstClockTime *min,
|
|
Packit |
971217 |
GstClockTime *max);
|
|
Packit |
971217 |
Sets the variables pointed to by min
|
|
Packit |
971217 |
and max
|
|
Packit |
971217 |
to the currently configured
|
|
Packit |
971217 |
latency.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
min
|
|
Packit |
971217 |
a pointer to storage to hold minimum latency.
|
|
Packit |
971217 |
[out][allow-none]
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
max
|
|
Packit |
971217 |
a pointer to storage to hold maximum latency.
|
|
Packit |
971217 |
[out][allow-none]
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_get_lookahead ()
|
|
Packit |
971217 |
gint
|
|
Packit |
971217 |
gst_audio_encoder_get_lookahead (GstAudioEncoder *enc);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
currently configured encoder lookahead
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_get_mark_granule ()
|
|
Packit |
971217 |
gboolean
|
|
Packit |
971217 |
gst_audio_encoder_get_mark_granule (GstAudioEncoder *enc);
|
|
Packit |
971217 |
Queries if the encoder will handle granule marking.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
TRUE if granule marking is enabled.
|
|
Packit |
971217 |
MT safe.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_get_perfect_timestamp ()
|
|
Packit |
971217 |
gboolean
|
|
Packit |
971217 |
gst_audio_encoder_get_perfect_timestamp
|
|
Packit |
971217 |
(GstAudioEncoder *enc);
|
|
Packit |
971217 |
Queries encoder perfect timestamp behaviour.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
TRUE if perfect timestamp setting enabled.
|
|
Packit |
971217 |
MT safe.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_get_tolerance ()
|
|
Packit |
971217 |
GstClockTime
|
|
Packit |
971217 |
gst_audio_encoder_get_tolerance (GstAudioEncoder *enc);
|
|
Packit |
971217 |
Queries current audio jitter tolerance threshold.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
encoder audio jitter tolerance threshold.
|
|
Packit |
971217 |
MT safe.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_proxy_getcaps ()
|
|
Packit |
971217 |
GstCaps *
|
|
Packit |
971217 |
gst_audio_encoder_proxy_getcaps (GstAudioEncoder *enc,
|
|
Packit |
971217 |
GstCaps *caps,
|
|
Packit |
971217 |
GstCaps *filter);
|
|
Packit |
971217 |
Returns caps that express caps
|
|
Packit |
971217 |
(or sink template caps if caps
|
|
Packit |
971217 |
== NULL)
|
|
Packit |
971217 |
restricted to channel/rate combinations supported by downstream elements
|
|
Packit |
971217 |
(e.g. muxers).
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
caps
|
|
Packit |
971217 |
initial caps.
|
|
Packit |
971217 |
[allow-none]
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
filter
|
|
Packit |
971217 |
filter caps.
|
|
Packit |
971217 |
[allow-none]
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Returns
|
|
Packit |
971217 |
a GstCaps owned by caller.
|
|
Packit |
971217 |
[transfer full]
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_set_drainable ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_audio_encoder_set_drainable (GstAudioEncoder *enc,
|
|
Packit |
971217 |
gboolean enabled);
|
|
Packit |
971217 |
Configures encoder drain handling. If drainable, subclass might
|
|
Packit |
971217 |
be handed a NULL buffer to have it return any leftover encoded data.
|
|
Packit |
971217 |
Otherwise, it is not considered so capable and will only ever be passed
|
|
Packit |
971217 |
real data.
|
|
Packit |
971217 |
MT safe.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
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Packit |
971217 |
|
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Packit |
971217 |
|
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Packit |
971217 |
|
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Packit |
971217 |
|
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Packit |
971217 |
|
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Packit |
971217 |
|
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Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enabled
|
|
Packit |
971217 |
new state
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
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Packit |
971217 |
|
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Packit |
971217 |
|
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Packit |
971217 |
|
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Packit |
971217 |
|
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Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_set_frame_max ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_audio_encoder_set_frame_max (GstAudioEncoder *enc,
|
|
Packit |
971217 |
gint num);
|
|
Packit |
971217 |
Sets max number of frames accepted at once (assumed minimally 1).
|
|
Packit |
971217 |
Requires frame_samples_min
|
|
Packit |
971217 |
and frame_samples_max
|
|
Packit |
971217 |
to be the equal.
|
|
Packit |
971217 |
Note: This value will be reset to 0 every time before
|
|
Packit |
971217 |
GstAudioEncoder::set_format() is called.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
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Packit |
971217 |
|
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Packit |
971217 |
|
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Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
num
|
|
Packit |
971217 |
number of frames
|
|
Packit |
971217 |
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Packit |
971217 |
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Packit |
971217 |
|
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Packit |
971217 |
|
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Packit |
971217 |
|
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Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_set_frame_samples_min ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_audio_encoder_set_frame_samples_min
|
|
Packit |
971217 |
(GstAudioEncoder *enc,
|
|
Packit |
971217 |
gint num);
|
|
Packit |
971217 |
Sets number of samples (per channel) subclass needs to be handed,
|
|
Packit |
971217 |
at least or will be handed all available if 0.
|
|
Packit |
971217 |
If an exact number of samples is required, gst_audio_encoder_set_frame_samples_max()
|
|
Packit |
971217 |
must be called with the same number.
|
|
Packit |
971217 |
Note: This value will be reset to 0 every time before
|
|
Packit |
971217 |
GstAudioEncoder::set_format() is called.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
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Packit |
971217 |
|
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Packit |
971217 |
|
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Packit |
971217 |
|
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Packit |
971217 |
|
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Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
num
|
|
Packit |
971217 |
number of samples per frame
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_set_frame_samples_max ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_audio_encoder_set_frame_samples_max
|
|
Packit |
971217 |
(GstAudioEncoder *enc,
|
|
Packit |
971217 |
gint num);
|
|
Packit |
971217 |
Sets number of samples (per channel) subclass needs to be handed,
|
|
Packit |
971217 |
at most or will be handed all available if 0.
|
|
Packit |
971217 |
If an exact number of samples is required, gst_audio_encoder_set_frame_samples_min()
|
|
Packit |
971217 |
must be called with the same number.
|
|
Packit |
971217 |
Note: This value will be reset to 0 every time before
|
|
Packit |
971217 |
GstAudioEncoder::set_format() is called.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
num
|
|
Packit |
971217 |
number of samples per frame
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_set_hard_min ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_audio_encoder_set_hard_min (GstAudioEncoder *enc,
|
|
Packit |
971217 |
gboolean enabled);
|
|
Packit |
971217 |
Configures encoder hard minimum handling. If enabled, subclass
|
|
Packit |
971217 |
will never be handed less samples than it configured, which otherwise
|
|
Packit |
971217 |
might occur near end-of-data handling. Instead, the leftover samples
|
|
Packit |
971217 |
will simply be discarded.
|
|
Packit |
971217 |
MT safe.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enabled
|
|
Packit |
971217 |
new state
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_set_hard_resync ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_audio_encoder_set_hard_resync (GstAudioEncoder *enc,
|
|
Packit |
971217 |
gboolean enabled);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_set_headers ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_audio_encoder_set_headers (GstAudioEncoder *enc,
|
|
Packit |
971217 |
GList *headers);
|
|
Packit |
971217 |
Set the codec headers to be sent downstream whenever requested.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
headers
|
|
Packit |
971217 |
a list of
|
|
Packit |
971217 |
GstBuffer containing the codec header.
|
|
Packit |
971217 |
[transfer full][element-type Gst.Buffer]
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_set_latency ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_audio_encoder_set_latency (GstAudioEncoder *enc,
|
|
Packit |
971217 |
GstClockTime min,
|
|
Packit |
971217 |
GstClockTime max);
|
|
Packit |
971217 |
Sets encoder latency.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
min
|
|
Packit |
971217 |
minimum latency
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
max
|
|
Packit |
971217 |
maximum latency
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_set_lookahead ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_audio_encoder_set_lookahead (GstAudioEncoder *enc,
|
|
Packit |
971217 |
gint num);
|
|
Packit |
971217 |
Sets encoder lookahead (in units of input rate samples)
|
|
Packit |
971217 |
Note: This value will be reset to 0 every time before
|
|
Packit |
971217 |
GstAudioEncoder::set_format() is called.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
num
|
|
Packit |
971217 |
lookahead
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_set_mark_granule ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_audio_encoder_set_mark_granule (GstAudioEncoder *enc,
|
|
Packit |
971217 |
gboolean enabled);
|
|
Packit |
971217 |
Enable or disable encoder granule handling.
|
|
Packit |
971217 |
MT safe.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enabled
|
|
Packit |
971217 |
new state
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_set_perfect_timestamp ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_audio_encoder_set_perfect_timestamp
|
|
Packit |
971217 |
(GstAudioEncoder *enc,
|
|
Packit |
971217 |
gboolean enabled);
|
|
Packit |
971217 |
Enable or disable encoder perfect output timestamp preference.
|
|
Packit |
971217 |
MT safe.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enabled
|
|
Packit |
971217 |
new state
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_set_tolerance ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_audio_encoder_set_tolerance (GstAudioEncoder *enc,
|
|
Packit |
971217 |
GstClockTime tolerance);
|
|
Packit |
971217 |
Configures encoder audio jitter tolerance threshold.
|
|
Packit |
971217 |
MT safe.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
tolerance
|
|
Packit |
971217 |
new tolerance
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_audio_encoder_set_allocation_caps ()
|
|
Packit |
971217 |
void
|
|
Packit |
971217 |
gst_audio_encoder_set_allocation_caps (GstAudioEncoder *enc,
|
|
Packit |
971217 |
GstCaps *allocation_caps);
|
|
Packit |
971217 |
Sets a caps in allocation query which are different from the set
|
|
Packit |
971217 |
pad's caps. Use this function before calling
|
|
Packit |
971217 |
gst_audio_encoder_negotiate(). Setting to NULL the allocation
|
|
Packit |
971217 |
query will use the caps from the pad.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Parameters
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
enc
|
|
Packit |
971217 |
a GstAudioEncoder
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
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allocation_caps
|
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a GstCaps or NULL.
|
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[allow-none]
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Since: 1.10
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gst_audio_encoder_merge_tags ()
|
|
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void
|
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gst_audio_encoder_merge_tags (GstAudioEncoder *enc,
|
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const GstTagList *tags,
|
|
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GstTagMergeMode mode);
|
|
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Sets the audio encoder tags and how they should be merged with any
|
|
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upstream stream tags. This will override any tags previously-set
|
|
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with gst_audio_encoder_merge_tags().
|
|
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Note that this is provided for convenience, and the subclass is
|
|
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not required to use this and can still do tag handling on its own.
|
|
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MT safe.
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Parameters
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enc
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a GstAudioEncoder
|
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tags
|
|
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a GstTagList to merge, or NULL to unset
|
|
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previously-set tags.
|
|
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[allow-none]
|
|
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|
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mode
|
|
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the GstTagMergeMode to use, usually GST_TAG_MERGE_REPLACE
|
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Types and Values
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struct GstAudioEncoder
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struct GstAudioEncoder;
|
|
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The opaque GstAudioEncoder data structure.
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struct GstAudioEncoderClass
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struct GstAudioEncoderClass {
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GstElementClass element_class;
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|
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/* virtual methods for subclasses */
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gboolean (*start) (GstAudioEncoder *enc);
|
|
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gboolean (*stop) (GstAudioEncoder *enc);
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|
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|
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gboolean (*set_format) (GstAudioEncoder *enc,
|
|
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GstAudioInfo *info);
|
|
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|
|
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GstFlowReturn (*handle_frame) (GstAudioEncoder *enc,
|
|
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GstBuffer *buffer);
|
|
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|
|
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void (*flush) (GstAudioEncoder *enc);
|
|
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|
|
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GstFlowReturn (*pre_push) (GstAudioEncoder *enc,
|
|
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GstBuffer **buffer);
|
|
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|
|
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gboolean (*sink_event) (GstAudioEncoder *enc,
|
|
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GstEvent *event);
|
|
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|
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gboolean (*src_event) (GstAudioEncoder *enc,
|
|
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GstEvent *event);
|
|
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|
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GstCaps * (*getcaps) (GstAudioEncoder *enc, GstCaps *filter);
|
|
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|
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gboolean (*open) (GstAudioEncoder *enc);
|
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gboolean (*close) (GstAudioEncoder *enc);
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gboolean (*negotiate) (GstAudioEncoder *enc);
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gboolean (*decide_allocation) (GstAudioEncoder *enc, GstQuery *query);
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|
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gboolean (*propose_allocation) (GstAudioEncoder * enc,
|
|
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GstQuery * query);
|
|
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|
|
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gboolean (*transform_meta) (GstAudioEncoder *enc, GstBuffer *outbuf,
|
|
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GstMeta *meta, GstBuffer *inbuf);
|
|
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|
|
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gboolean (*sink_query) (GstAudioEncoder *encoder,
|
|
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GstQuery *query);
|
|
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|
|
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gboolean (*src_query) (GstAudioEncoder *encoder,
|
|
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GstQuery *query);
|
|
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};
|
|
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|
|
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Subclasses can override any of the available virtual methods or not, as
|
|
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needed. At minimum set_format
|
|
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and handle_frame
|
|
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needs to be overridden.
|
|
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|
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Members
|
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|
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|
|
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GstElementClass element_class;
|
|
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The parent class structure
|
|
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|
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|
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|
|
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start ()
|
|
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Optional.
|
|
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971217 |
Called when the element starts processing.
|
|
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Allows opening external resources.
|
|
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|
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|
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|
|
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stop ()
|
|
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Optional.
|
|
Packit |
971217 |
Called when the element stops processing.
|
|
Packit |
971217 |
Allows closing external resources.
|
|
Packit |
971217 |
|
|
Packit |
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|
|
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|
|
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set_format ()
|
|
Packit |
971217 |
Notifies subclass of incoming data format.
|
|
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971217 |
GstAudioInfo contains the format according to provided caps.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
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971217 |
|
|
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971217 |
handle_frame ()
|
|
Packit |
971217 |
Provides input samples (or NULL to clear any remaining data)
|
|
Packit |
971217 |
according to directions as configured by the subclass
|
|
Packit |
971217 |
using the API. Input data ref management is performed
|
|
Packit |
971217 |
by base class, subclass should not care or intervene,
|
|
Packit |
971217 |
and input data is only valid until next call to base class,
|
|
Packit |
971217 |
most notably a call to gst_audio_encoder_finish_frame().
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
flush ()
|
|
Packit |
971217 |
Optional.
|
|
Packit |
971217 |
Instructs subclass to clear any codec caches and discard
|
|
Packit |
971217 |
any pending samples and not yet returned encoded data.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
pre_push ()
|
|
Packit |
971217 |
Optional.
|
|
Packit |
971217 |
Called just prior to pushing (encoded data) buffer downstream.
|
|
Packit |
971217 |
Subclass has full discretionary access to buffer,
|
|
Packit |
971217 |
and a not OK flow return will abort downstream pushing.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
sink_event ()
|
|
Packit |
971217 |
Optional.
|
|
Packit |
971217 |
Event handler on the sink pad. Subclasses should chain up to
|
|
Packit |
971217 |
the parent implementation to invoke the default handler.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
src_event ()
|
|
Packit |
971217 |
Optional.
|
|
Packit |
971217 |
Event handler on the src pad. Subclasses should chain up to
|
|
Packit |
971217 |
the parent implementation to invoke the default handler.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
getcaps ()
|
|
Packit |
971217 |
Optional.
|
|
Packit |
971217 |
Allows for a custom sink getcaps implementation (e.g.
|
|
Packit |
971217 |
for multichannel input specification). If not implemented,
|
|
Packit |
971217 |
default returns gst_audio_encoder_proxy_getcaps
|
|
Packit |
971217 |
applied to sink template caps.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
open ()
|
|
Packit |
971217 |
Optional.
|
|
Packit |
971217 |
Called when the element changes to GST_STATE_READY.
|
|
Packit |
971217 |
Allows opening external resources.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
close ()
|
|
Packit |
971217 |
Optional.
|
|
Packit |
971217 |
Called when the element changes to GST_STATE_NULL.
|
|
Packit |
971217 |
Allows closing external resources.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
negotiate ()
|
|
Packit |
971217 |
Optional.
|
|
Packit |
971217 |
Negotiate with downstream and configure buffer pools, etc.
|
|
Packit |
971217 |
Subclasses should chain up to the parent implementation to
|
|
Packit |
971217 |
invoke the default handler.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
decide_allocation ()
|
|
Packit |
971217 |
Optional.
|
|
Packit |
971217 |
Setup the allocation parameters for allocating output
|
|
Packit |
971217 |
buffers. The passed in query contains the result of the
|
|
Packit |
971217 |
downstream allocation query.
|
|
Packit |
971217 |
Subclasses should chain up to the parent implementation to
|
|
Packit |
971217 |
invoke the default handler.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
propose_allocation ()
|
|
Packit |
971217 |
Optional.
|
|
Packit |
971217 |
Propose buffer allocation parameters for upstream elements.
|
|
Packit |
971217 |
Subclasses should chain up to the parent implementation to
|
|
Packit |
971217 |
invoke the default handler.
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
transform_meta ()
|
|
Packit |
971217 |
Optional. Transform the metadata on the input buffer to the
|
|
Packit |
971217 |
output buffer. By default this method copies all meta without
|
|
Packit |
971217 |
tags and meta with only the "audio" tag. subclasses can
|
|
Packit |
971217 |
implement this method and return TRUE if the metadata is to be
|
|
Packit |
971217 |
copied. Since 1.6
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
sink_query ()
|
|
Packit |
971217 |
Optional.
|
|
Packit |
971217 |
Query handler on the sink pad. This function should
|
|
Packit |
971217 |
return TRUE if the query could be performed. Subclasses
|
|
Packit |
971217 |
should chain up to the parent implementation to invoke the
|
|
Packit |
971217 |
default handler. Since 1.6
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
src_query ()
|
|
Packit |
971217 |
Optional.
|
|
Packit |
971217 |
Query handler on the source pad. This function should
|
|
Packit |
971217 |
return TRUE if the query could be performed. Subclasses
|
|
Packit |
971217 |
should chain up to the parent implementation to invoke the
|
|
Packit |
971217 |
default handler. Since 1.6
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
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971217 |
|
|
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971217 |
|
|
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971217 |
|
|
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971217 |
|
|
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971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
GST_AUDIO_ENCODER_SINK_NAME
|
|
Packit |
971217 |
#define GST_AUDIO_ENCODER_SINK_NAME "sink"
|
|
Packit |
971217 |
|
|
Packit |
971217 |
the name of the templates for the sink pad
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
GST_AUDIO_ENCODER_SRC_NAME
|
|
Packit |
971217 |
#define GST_AUDIO_ENCODER_SRC_NAME "src"
|
|
Packit |
971217 |
|
|
Packit |
971217 |
the name of the templates for the source pad
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Property Details
|
|
Packit |
971217 |
|
|
Packit |
971217 |
The “hard-resync” property
|
|
Packit |
971217 |
“hard-resync” gboolean
|
|
Packit |
971217 |
Perform clipping and sample flushing upon discontinuity.
|
|
Packit |
971217 |
Flags: Read / Write
|
|
Packit |
971217 |
Default value: FALSE
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
The “mark-granule” property
|
|
Packit |
971217 |
“mark-granule” gboolean
|
|
Packit |
971217 |
Apply granule semantics to buffer metadata (implies perfect-timestamp).
|
|
Packit |
971217 |
Flags: Read
|
|
Packit |
971217 |
Default value: FALSE
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
The “perfect-timestamp” property
|
|
Packit |
971217 |
“perfect-timestamp” gboolean
|
|
Packit |
971217 |
Favour perfect timestamps over tracking upstream timestamps.
|
|
Packit |
971217 |
Flags: Read / Write
|
|
Packit |
971217 |
Default value: FALSE
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
The “tolerance” property
|
|
Packit |
971217 |
“tolerance” gint64
|
|
Packit |
971217 |
Consider discontinuity if timestamp jitter/imperfection exceeds tolerance (ns).
|
|
Packit |
971217 |
Flags: Read / Write
|
|
Packit |
971217 |
Allowed values: >= 0
|
|
Packit |
971217 |
Default value: 40000000
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
See Also
|
|
Packit |
971217 |
GstBaseTransform
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
Generated by GTK-Doc V1.27
|
|
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971217 |
</body>
|
|
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971217 |
</html>
|