Definition at line 36 of file buffersrc.h.

Get the number of failed requests.

A failed request is when the request_frame method is called while no frame is present in the buffer. The number is reset when a frame is added.

Definition at line 323 of file buffersrc.c.

Referenced by choose_input().

Allocate a new AVBufferSrcParameters instance.

It should be freed by the caller with av_free().

Definition at line 107 of file buffersrc.c.

Referenced by configure_input_audio_filter(), configure_input_video_filter(), and configure_video_filters().

Initialize the buffersrc or abuffersrc filter with the provided parameters.

This function may be called multiple times, the later calls override the previous ones. Some of the parameters may also be set through AVOptions, then whatever method is used last takes precedence.

Parameters

ctx an instance of the buffersrc or abuffersrc filter

param the stream parameters. The frames later passed to this filter must conform to those parameters. All the allocated fields in param remain owned by the caller, libavfilter will make internal copies or references when necessary.

Returns

0 on success, a negative AVERROR code on failure.

Definition at line 121 of file buffersrc.c.

Referenced by configure_input_audio_filter(), configure_input_video_filter(), and configure_video_filters().

Add a frame to the buffer source.

Parameters

ctx an instance of the buffersrc filter

frame frame to be added. If the frame is reference counted, this function will make a new reference to it. Otherwise the frame data will be copied.

Returns

0 on success, a negative AVERROR on error

This function is equivalent to av_buffersrc_add_frame_flags() with the AV_BUFFERSRC_FLAG_KEEP_REF flag.

Definition at line 184 of file buffersrc.c.

Add a frame to the buffer source.

Parameters

ctx an instance of the buffersrc filter

frame frame to be added. If the frame is reference counted, this function will take ownership of the reference(s) and reset the frame. Otherwise the frame data will be copied. If this function returns an error, the input frame is not touched.

Returns

0 on success, a negative AVERROR on error.

Note

the difference between this function and av_buffersrc_write_frame() is that av_buffersrc_write_frame() creates a new reference to the input frame, while this function takes ownership of the reference passed to it.

This function is equivalent to av_buffersrc_add_frame_flags() without the AV_BUFFERSRC_FLAG_KEEP_REF flag.

Definition at line 190 of file buffersrc.c.

Referenced by audio_thread(), configure_filtergraph(), main(), sub2video_frame(), and video_thread().

Add a frame to the buffer source.

By default, if the frame is reference-counted, this function will take ownership of the reference(s) and reset the frame. This can be controlled using the flags.

If this function returns an error, the input frame is not touched.

Parameters

buffer_src pointer to a buffer source context

frame a frame, or NULL to mark EOF

flags a combination of AV_BUFFERSRC_FLAG_*

Returns

>= 0 in case of success, a negative AVERROR code in case of failure

Definition at line 209 of file buffersrc.c.

Referenced by av_buffersrc_add_frame(), av_buffersrc_write_frame(), filter_encode_write_frame(), main(), send_frame(), and sub2video_push_ref().

Close the buffer source after EOF.

This is similar to passing NULL to av_buffersrc_add_frame_flags() except it takes the timestamp of the EOF, i.e. the timestamp of the end of the last frame.

Definition at line 280 of file buffersrc.c.

Referenced by av_buffersrc_add_frame_flags(), and send_eof().