Optional. Called when the element changes to GST_STATE_NULL. Allows closing external resources.
Optional. Setup the allocation parameters for allocating output buffers. The passed in query contains the result of the downstream allocation query. Subclasses should chain up to the parent implementation to invoke the default handler.
The parent class structure
Optional. Instructs subclass to clear any codec caches and discard any pending samples and not yet returned decoded data. @hard indicates whether a FLUSH is being processed, or otherwise a DISCONT (or conceptually similar).
Optional. Allows for a custom sink getcaps implementation. If not implemented, default returns gst_audio_decoder_proxy_getcaps applied to sink template caps.
Provides input data (or NULL to clear any remaining data) to subclass. Input data ref management is performed by base class, subclass should not care or intervene, and input data is only valid until next call to base class, most notably a call to gstaudio.audio_decoder.AudioDecoder.finishFrame.
Optional. Negotiate with downstream and configure buffer pools, etc. Subclasses should chain up to the parent implementation to invoke the default handler.
Optional. Called when the element changes to GST_STATE_READY. Allows opening external resources.
Optional. Allows chopping incoming data into manageable units (frames) for subsequent decoding. This division is at subclass discretion and may or may not correspond to 1 (or more) frames as defined by audio format.
Optional. Called just prior to pushing (encoded data) buffer downstream. Subclass has full discretionary access to buffer, and a not OK flow return will abort downstream pushing.
Optional. Propose buffer allocation parameters for upstream elements. Subclasses should chain up to the parent implementation to invoke the default handler.
Notifies subclass of incoming data format (caps).
Optional. Event handler on the sink pad. Subclasses should chain up to the parent implementation to invoke the default handler.
Optional. Query handler on the sink pad. This function should return TRUE if the query could be performed. Subclasses should chain up to the parent implementation to invoke the default handler. Since: 1.6
Optional. Event handler on the src pad. Subclasses should chain up to the parent implementation to invoke the default handler.
Optional. Query handler on the source pad. This function should return TRUE if the query could be performed. Subclasses should chain up to the parent implementation to invoke the default handler. Since: 1.6
Optional. Called when the element starts processing. Allows opening external resources.
Optional. Called when the element stops processing. Allows closing external resources.
Optional. Transform the metadata on the input buffer to the output buffer. By default this method copies all meta without tags and meta with only the "audio" tag. subclasses can implement this method and return true if the metadata is to be copied. Since: 1.6
Subclasses can override any of the available virtual methods or not, as needed. At minimum @handle_frame (and likely @set_format) needs to be overridden.