Fill plane data pointers and linesize for samples with sample format sample_fmt.

The audio_data array is filled with the pointers to the samples data planes: for planar, set the start point of each channel's data within the buffer, for packed, set the start point of the entire buffer only.

The value pointed to by linesize is set to the aligned size of each channel's data buffer for planar layout, or to the aligned size of the buffer for all channels for packed layout.

The buffer in buf must be big enough to contain all the samples (use av_samples_get_buffer_size() to compute its minimum size), otherwise the audio_data pointers will point to invalid data.

See Also

enum AVSampleFormat The documentation for AVSampleFormat describes the data layout.

Parameters

[out] audio_data array to be filled with the pointer for each channel

[out] linesize calculated linesize, may be NULL

buf the pointer to a buffer containing the samples

nb_channels the number of channels

nb_samples the number of samples in a single channel

sample_fmt the sample format

align buffer size alignment (0 = default, 1 = no alignment)

Returns

>=0 on success or a negative error code on failure

Todo:

return minimum size in bytes required for the buffer in case of success at the next bump

Definition at line 151 of file samplefmt.c.

Referenced by allocate_buffers(), av_samples_alloc(), avcodec_fill_audio_frame(), ff_audio_data_realloc(), main(), and tak_decode_frame().

Allocate a samples buffer for nb_samples samples, and fill data pointers and linesize accordingly.

The allocated samples buffer can be freed by using av_freep(&audio_data[0]) Allocated data will be initialized to silence.

See Also

enum AVSampleFormat The documentation for AVSampleFormat describes the data layout.

Parameters

[out] audio_data array to be filled with the pointer for each channel

[out] linesize aligned size for audio buffer(s), may be NULL

nb_channels number of audio channels

nb_samples number of samples per channel

align buffer size alignment (0 = default, 1 = no alignment)

Returns

>=0 on success or a negative error code on failure

Todo:

return the size of the allocated buffer in case of success at the next bump

See Also

av_samples_fill_arrays()

av_samples_alloc_array_and_samples()

Definition at line 173 of file samplefmt.c.

Referenced by av_samples_alloc_array_and_samples(), ff_audio_data_realloc(), init_converted_samples(), and main().

Allocate a data pointers array, samples buffer for nb_samples samples, and fill data pointers and linesize accordingly.

This is the same as av_samples_alloc(), but also allocates the data pointers array.

See Also

av_samples_alloc()

Definition at line 198 of file samplefmt.c.

Referenced by config_input(), config_output(), and main().

Copy samples from src to dst.

Parameters

dst destination array of pointers to data planes

src source array of pointers to data planes

dst_offset offset in samples at which the data will be written to dst

src_offset offset in samples at which the data will be read from src

nb_samples number of samples to be copied

nb_channels number of audio channels

sample_fmt audio sample format

Definition at line 213 of file samplefmt.c.

Referenced by decode_simple_internal(), ff_inlink_make_frame_writable(), frame_copy_audio(), pad_last_frame(), return_audio_frame(), and take_samples().

Fill an audio buffer with silence.

Parameters

audio_data array of pointers to data planes

offset offset in samples at which to start filling

nb_samples number of samples to fill

nb_channels number of audio channels

sample_fmt audio sample format

Definition at line 237 of file samplefmt.c.

Referenced by av_samples_alloc(), ff_audio_data_copy(), ff_audio_mix(), ff_default_get_audio_buffer(), pad_last_frame(), push_samples(), request_frame(), return_audio_frame(), and send_silence().