X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavfilter%2Finternal.h;h=c217883319f134cbc8828690c3dd385a84a0e477;hb=b4780d03d04d402b490be21b01ec886565cabe29;hp=bb45274e27590c709da077d4576c999153ccf683;hpb=394b692b70587af74a6957640cab0dce3bc9934d;p=ffmpeg diff --git a/libavfilter/internal.h b/libavfilter/internal.h index bb45274e275..c217883319f 100644 --- a/libavfilter/internal.h +++ b/libavfilter/internal.h @@ -27,6 +27,7 @@ #include "avfilter.h" #include "avfiltergraph.h" #include "formats.h" +#include "video.h" #define POOL_SIZE 32 typedef struct AVFilterPool { @@ -45,31 +46,154 @@ typedef struct AVFilterCommand { } AVFilterCommand; /** - * Check for the validity of graph. - * - * A graph is considered valid if all its input and output pads are - * connected. - * - * @return 0 in case of success, a negative value otherwise + * Update the position of a link in the age heap. */ -int ff_avfilter_graph_check_validity(AVFilterGraph *graphctx, AVClass *log_ctx); +void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link); +#if !FF_API_AVFILTERPAD_PUBLIC /** - * Configure all the links of graphctx. - * - * @return 0 in case of success, a negative value otherwise + * A filter pad used for either input or output. */ -int ff_avfilter_graph_config_links(AVFilterGraph *graphctx, AVClass *log_ctx); +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; -/** - * Configure the formats of all the links in the graph. - */ -int ff_avfilter_graph_config_formats(AVFilterGraph *graphctx, AVClass *log_ctx); + /** + * AVFilterPad type. + */ + enum AVMediaType type; -/** - * Update the position of a link in the age heap. - */ -void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link); + /** + * 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. + * + * @return >= 0 on success, a negative AVERROR on error. picref will be + * unreferenced by the caller in case of error. + */ + 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. + * + * @return >= 0 on success, a negative AVERROR on error. + */ + int (*end_frame)(AVFilterLink *link); + + /** + * Slice drawing callback. This is where a filter receives video data + * and should do its processing. + * + * Input video pads only. + * + * @return >= 0 on success, a negative AVERROR on error. + */ + int (*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. + * + * @return >= 0 on success, a negative AVERROR on error. This function + * must ensure that samplesref is properly unreferenced on error if it + * hasn't been passed on to another filter. + */ + int (*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); + + /** + * The filter expects a fifo to be inserted on its input link, + * typically because it has a delay. + * + * input pads only. + */ + int needs_fifo; +}; +#endif /** default handler for freeing audio/video buffer when there are no references left */ void ff_avfilter_default_free_buffer(AVFilterBuffer *buf); @@ -141,23 +265,104 @@ int ff_parse_sample_format(int *ret, const char *arg, void *log_ctx); */ int ff_parse_channel_layout(int64_t *ret, const char *arg, void *log_ctx); +void ff_update_link_current_pts(AVFilterLink *link, int64_t pts); + +void ff_free_pool(AVFilterPool *pool); + +void ff_command_queue_pop(AVFilterContext *filter); + +/* misc trace functions */ + +/* #define FF_AVFILTER_TRACE */ + +#ifdef FF_AVFILTER_TRACE +# define ff_tlog(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__) +#else +# define ff_tlog(pctx, ...) do { if (0) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__); } while (0) +#endif + +#define FF_TPRINTF_START(ctx, func) ff_tlog(NULL, "%-16s: ", #func) + +char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms); + +void ff_tlog_ref(void *ctx, AVFilterBufferRef *ref, int end); + +void ff_tlog_link(void *ctx, AVFilterLink *link, int end); + /** - * Pass video frame along and keep an internal reference for later use. + * Insert a new pad. + * + * @param idx Insertion point. Pad is inserted at the end if this point + * is beyond the end of the list of pads. + * @param count Pointer to the number of pads in the list + * @param padidx_off Offset within an AVFilterLink structure to the element + * to increment when inserting a new pad causes link + * numbering to change + * @param pads Pointer to the pointer to the beginning of the list of pads + * @param links Pointer to the pointer to the beginning of the list of links + * @param newpad The new pad to add. A copy is made when adding. */ -static inline void ff_null_start_frame_keep_ref(AVFilterLink *inlink, - AVFilterBufferRef *picref) +void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off, + AVFilterPad **pads, AVFilterLink ***links, + AVFilterPad *newpad); + +/** Insert a new input pad for the filter. */ +static inline void ff_insert_inpad(AVFilterContext *f, unsigned index, + AVFilterPad *p) { - avfilter_start_frame(inlink->dst->outputs[0], avfilter_ref_buffer(picref, ~0)); + ff_insert_pad(index, &f->nb_inputs, offsetof(AVFilterLink, dstpad), + &f->input_pads, &f->inputs, p); +#if FF_API_FOO_COUNT + f->input_count = f->nb_inputs; +#endif } -void ff_update_link_current_pts(AVFilterLink *link, int64_t pts); +/** Insert a new output pad for the filter. */ +static inline void ff_insert_outpad(AVFilterContext *f, unsigned index, + AVFilterPad *p) +{ + ff_insert_pad(index, &f->nb_outputs, offsetof(AVFilterLink, srcpad), + &f->output_pads, &f->outputs, p); +#if FF_API_FOO_COUNT + f->output_count = f->nb_outputs; +#endif +} -void ff_free_pool(AVFilterPool *pool); +/** + * Poll a frame from the filter chain. + * + * @param link the input link + * @return the number of immediately available frames, a negative + * number in case of error + */ +int ff_poll_frame(AVFilterLink *link); -void ff_command_queue_pop(AVFilterContext *filter); +/** + * Request an input frame from the filter at the other end of the link. + * + * @param link the input link + * @return zero on success + */ +int ff_request_frame(AVFilterLink *link); + +#define AVFILTER_DEFINE_CLASS(fname) \ + static const AVClass fname##_class = { \ + .class_name = #fname, \ + .item_name = av_default_item_name, \ + .option = fname##_options, \ + .version = LIBAVUTIL_VERSION_INT, \ + .category = AV_CLASS_CATEGORY_FILTER, \ + } -#define FF_DPRINTF_START(ctx, func) av_dlog(NULL, "%-16s: ", #func) +AVFilterBufferRef *ff_copy_buffer_ref(AVFilterLink *outlink, + AVFilterBufferRef *ref); -void ff_dlog_link(void *ctx, AVFilterLink *link, int end); +/** + * Find the index of a link. + * + * I.e. find i such that link == ctx->(in|out)puts[i] + */ +#define FF_INLINK_IDX(link) ((int)((link)->dstpad - (link)->dst->input_pads)) +#define FF_OUTLINK_IDX(link) ((int)((link)->srcpad - (link)->src->output_pads)) #endif /* AVFILTER_INTERNAL_H */