diff options
author | Anton Khirnov <anton@khirnov.net> | 2012-06-12 22:12:42 +0400 |
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committer | Anton Khirnov <anton@khirnov.net> | 2012-06-13 13:11:33 +0400 |
commit | 9d0bfc5052fa73ac8df89ec9992d77b07840fdf0 (patch) | |
tree | 95435f6e28872a5e859dd3e0f468dacf7815ef60 /libavfilter/internal.h | |
parent | 84b9fbe05578c8b4058e72bb0b203665a446a95a (diff) |
lavfi: make AVFilterPad opaque after two major bumps.
It will allow adding new fields to it without ABI breaks.
Diffstat (limited to 'libavfilter/internal.h')
-rw-r--r-- | libavfilter/internal.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/libavfilter/internal.h b/libavfilter/internal.h index 4b53831063..f6dc74b082 100644 --- a/libavfilter/internal.h +++ b/libavfilter/internal.h @@ -26,6 +26,132 @@ #include "avfilter.h" +#if !FF_API_AVFILTERPAD_PUBLIC +/** + * A filter pad used for either input or output. + */ +struct AVFilterPad { + /** + * Pad name. The name is unique among inputs and among outputs, but an + * input may have the same name as an output. This may be NULL if this + * pad has no need to ever be referenced by name. + */ + const char *name; + + /** + * AVFilterPad type. + */ + enum AVMediaType type; + + /** + * Minimum required permissions on incoming buffers. Any buffer with + * insufficient permissions will be automatically copied by the filter + * system to a new buffer which provides the needed access permissions. + * + * Input pads only. + */ + int min_perms; + + /** + * Permissions which are not accepted on incoming buffers. Any buffer + * which has any of these permissions set will be automatically copied + * by the filter system to a new buffer which does not have those + * permissions. This can be used to easily disallow buffers with + * AV_PERM_REUSE. + * + * Input pads only. + */ + int rej_perms; + + /** + * Callback called before passing the first slice of a new frame. If + * NULL, the filter layer will default to storing a reference to the + * picture inside the link structure. + * + * Input video pads only. + */ + void (*start_frame)(AVFilterLink *link, AVFilterBufferRef *picref); + + /** + * Callback function to get a video buffer. If NULL, the filter system will + * use avfilter_default_get_video_buffer(). + * + * Input video pads only. + */ + AVFilterBufferRef *(*get_video_buffer)(AVFilterLink *link, int perms, int w, int h); + + /** + * Callback function to get an audio buffer. If NULL, the filter system will + * use avfilter_default_get_audio_buffer(). + * + * Input audio pads only. + */ + AVFilterBufferRef *(*get_audio_buffer)(AVFilterLink *link, int perms, + int nb_samples); + + /** + * Callback called after the slices of a frame are completely sent. If + * NULL, the filter layer will default to releasing the reference stored + * in the link structure during start_frame(). + * + * Input video pads only. + */ + void (*end_frame)(AVFilterLink *link); + + /** + * Slice drawing callback. This is where a filter receives video data + * and should do its processing. + * + * Input video pads only. + */ + void (*draw_slice)(AVFilterLink *link, int y, int height, int slice_dir); + + /** + * Samples filtering callback. This is where a filter receives audio data + * and should do its processing. + * + * Input audio pads only. + */ + void (*filter_samples)(AVFilterLink *link, AVFilterBufferRef *samplesref); + + /** + * Frame poll callback. This returns the number of immediately available + * samples. It should return a positive value if the next request_frame() + * is guaranteed to return one frame (with no delay). + * + * Defaults to just calling the source poll_frame() method. + * + * Output pads only. + */ + int (*poll_frame)(AVFilterLink *link); + + /** + * Frame request callback. A call to this should result in at least one + * frame being output over the given link. This should return zero on + * success, and another value on error. + * + * Output pads only. + */ + int (*request_frame)(AVFilterLink *link); + + /** + * Link configuration callback. + * + * For output pads, this should set the link properties such as + * width/height. This should NOT set the format property - that is + * negotiated between filters by the filter system using the + * query_formats() callback before this function is called. + * + * For input pads, this should check the properties of the link, and update + * the filter's internal state as necessary. + * + * For both input and output filters, this should return zero on success, + * and another value on error. + */ + int (*config_props)(AVFilterLink *link); +}; +#endif + /** default handler for freeing audio/video buffer when there are no references left */ void ff_avfilter_default_free_buffer(AVFilterBuffer *buf); |