[FFmpeg-devel] [PATCH] swresample: Add AVFrame based API

[Clément Bœsch]

On Mon, Aug 11, 2014 at 01:49:19AM +0200, Michael Niedermayer wrote:
> From: Luca Barbato <lu_zero at gentoo.org>
> 
> TODO:bump
> 
> Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> ---
>  libswresample/Makefile           |    1 +
>  libswresample/swresample.h       |   61 +++++++++++++++
>  libswresample/swresample_frame.c |  158 ++++++++++++++++++++++++++++++++++++++
>  3 files changed, 220 insertions(+)
>  create mode 100644 libswresample/swresample_frame.c
> 
[...]
> +/**
> + * Convert the samples in the input AVFrame and write them to the output AVFrame.
> + *
> + * Input and output AVFrames must have channel_layout, sample_rate and format set.
> + *
> + * If the output AVFrame does not have the data pointers allocated the nb_samples
> + * field will be set using av_frame_get_buffer()
> + * is called to allocate the frame.
> + *
> + * The output AVFrame can be NULL or have fewer allocated samples than required.
> + * In this case, any remaining samples not written to the output will be added
> + * to an internal FIFO buffer, to be returned at the next call to this function
> + * or to swr_convert() or to swr_convert_frame().
> + *
> + * If converting sample rate, there may be data remaining in the internal
> + * resampling delay buffer. swr_get_delay() tells the number of
> + * remaining samples. To get this data as output, call this function or
> + * swr_convert() with NULL input.
> + *
> + * If the SwrContext configuration does not match the output and
> + * input AVFrame settings the conversion does not take place and depending on
> + * which AVFrame is not matching AVERROR_OUTPUT_CHANGED, AVERROR_INPUT_CHANGED
> + * or AVERROR_OUTPUT_CHANGED|AVERROR_INPUT_CHANGED is returned.
> + *
> + * @see swr_delay()
> + * @see swr_convert()
> + * @see swr_get_delay()
> + *
> + * @param swr             audio resample context
> + * @param output          output AVFrame
> + * @param input           input AVFrame
> + * @return                0 on success, AVERROR on failure or nonmatching
> + *                        configuration.
> + */
> +int swr_convert_frame(SwrContext *swr,
> +                      AVFrame *output, AVFrame *input);
> +

Is it possible to have input AVFrame const or it needs to increment
references or something?

[...]

-- 
Clément B.
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