AudioEncoder

#include <icy/av/audioencoder.h>

Inherits: AudioContext Subclassed by: AudioPacketEncoder

Encodes raw audio samples into a compressed format.

Public Attributes

Return	Name	Description
`av::AudioBuffer`	`fifo`
`AVFormatContext *`	`format`
`int64_t`	`nextOutputPts`	Running PTS counter for encoder output, in encoder time_base units. Anchored to the first input packet's PTS, then advanced by frame->nb_samples per encoded frame. AV_NOPTS_VALUE before anchoring.

fifo

av::AudioBuffer fifo

format

AVFormatContext * format

nextOutputPts

int64_t nextOutputPts = AV_NOPTS_VALUE

Running PTS counter for encoder output, in encoder time_base units. Anchored to the first input packet's PTS, then advanced by frame->nb_samples per encoded frame. AV_NOPTS_VALUE before anchoring.

Public Methods

Return	Name	Description
	`AudioEncoder`	Construct an encoder, optionally tied to an existing muxer context.
`void`	`create` `virtual`	Initialise the AVCodecContext using oparams. Adds an audio stream to `format` if one was provided at construction.
`void`	`close` `virtual`	Close and free the AVCodecContext, FIFO buffer, and associated resources.
`bool`	`encode` `virtual`	Encode interleaved audio samples.
`bool`	`encode` `virtual`	Encode planar audio samples.
`bool`	`encode` `virtual`	Encode a single AVFrame (typically from a decoder or resampler).
`void`	`flush` `virtual`	Flush remaining packets to be encoded. This method should be called once before stream closure.

AudioEncoder

AudioEncoder(AVFormatContext * format)

Construct an encoder, optionally tied to an existing muxer context.

Parameters

format The AVFormatContext that will receive encoded packets, or nullptr for standalone use.

create

virtual

virtual void create()

Initialise the AVCodecContext using oparams. Adds an audio stream to format if one was provided at construction.

close

virtual

virtual void close()

Close and free the AVCodecContext, FIFO buffer, and associated resources.

encode

virtual

virtual bool encode(uint8_t * samples, const int numSamples, const int64_t pts)

Encode interleaved audio samples.

Parameters

samples The input samples to encode.
numSamples The number of input samples per channel.
pts The input samples presentation timestamp.

encode

virtual

virtual bool encode(uint8_t * samples, const int numSamples, const int64_t pts)

Encode planar audio samples.

Parameters

samples The input samples to encode.
numSamples The number of input samples per channel.
pts The input samples presentation timestamp.

encode

virtual

virtual bool encode(AVFrame * iframe)

Encode a single AVFrame (typically from a decoder or resampler).

Parameters

iframe The source audio frame with all fields set.

Returns

True if an encoded packet was produced and emitted.

flush

virtual

virtual void flush()

Flush remaining packets to be encoded. This method should be called once before stream closure.