X-Git-Url: http://47.100.26.94:8080/?a=blobdiff_plain;f=app%2Fsrc%2Fmain%2Fjni%2Finclude%2Flibavfilter%2Favfilter.h;fp=app%2Fsrc%2Fmain%2Fjni%2Finclude%2Flibavfilter%2Favfilter.h;h=0000000000000000000000000000000000000000;hb=577426ccc66649228285c4a0b6ba8752836059c6;hp=04bf5855e29fce8368049cb3e7a82cf8dcdfc830;hpb=b7202442677d0cf41e6e59870cd6c34e5619b8b9;p=rtmpclient.git diff --git a/app/src/main/jni/include/libavfilter/avfilter.h b/app/src/main/jni/include/libavfilter/avfilter.h deleted file mode 100644 index 04bf585..0000000 --- a/app/src/main/jni/include/libavfilter/avfilter.h +++ /dev/null @@ -1,1101 +0,0 @@ -/* - * filter layer - * Copyright (c) 2007 Bobby Bingham - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#ifndef AVFILTER_AVFILTER_H -#define AVFILTER_AVFILTER_H - -/** - * @file - * @ingroup lavfi - * Main libavfilter public API header - */ - -/** - * @defgroup lavfi Libavfilter - graph-based frame editing library - * @{ - */ - -#include - -#include "libavutil/attributes.h" -#include "libavutil/avutil.h" -#include "libavutil/dict.h" -#include "libavutil/frame.h" -#include "libavutil/log.h" -#include "libavutil/samplefmt.h" -#include "libavutil/pixfmt.h" -#include "libavutil/rational.h" - -#include "libavfilter/version.h" - -/** - * Return the LIBAVFILTER_VERSION_INT constant. - */ -unsigned avfilter_version(void); - -/** - * Return the libavfilter build-time configuration. - */ -const char *avfilter_configuration(void); - -/** - * Return the libavfilter license. - */ -const char *avfilter_license(void); - -typedef struct AVFilterContext AVFilterContext; -typedef struct AVFilterLink AVFilterLink; -typedef struct AVFilterPad AVFilterPad; -typedef struct AVFilterFormats AVFilterFormats; - -/** - * Get the number of elements in a NULL-terminated array of AVFilterPads (e.g. - * AVFilter.inputs/outputs). - */ -int avfilter_pad_count(const AVFilterPad *pads); - -/** - * Get the name of an AVFilterPad. - * - * @param pads an array of AVFilterPads - * @param pad_idx index of the pad in the array it; is the caller's - * responsibility to ensure the index is valid - * - * @return name of the pad_idx'th pad in pads - */ -const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx); - -/** - * Get the type of an AVFilterPad. - * - * @param pads an array of AVFilterPads - * @param pad_idx index of the pad in the array; it is the caller's - * responsibility to ensure the index is valid - * - * @return type of the pad_idx'th pad in pads - */ -enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx); - -/** - * The number of the filter inputs is not determined just by AVFilter.inputs. - * The filter might add additional inputs during initialization depending on the - * options supplied to it. - */ -#define AVFILTER_FLAG_DYNAMIC_INPUTS (1 << 0) -/** - * The number of the filter outputs is not determined just by AVFilter.outputs. - * The filter might add additional outputs during initialization depending on - * the options supplied to it. - */ -#define AVFILTER_FLAG_DYNAMIC_OUTPUTS (1 << 1) -/** - * The filter supports multithreading by splitting frames into multiple parts - * and processing them concurrently. - */ -#define AVFILTER_FLAG_SLICE_THREADS (1 << 2) -/** - * Some filters support a generic "enable" expression option that can be used - * to enable or disable a filter in the timeline. Filters supporting this - * option have this flag set. When the enable expression is false, the default - * no-op filter_frame() function is called in place of the filter_frame() - * callback defined on each input pad, thus the frame is passed unchanged to - * the next filters. - */ -#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC (1 << 16) -/** - * Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will - * have its filter_frame() callback(s) called as usual even when the enable - * expression is false. The filter will disable filtering within the - * filter_frame() callback(s) itself, for example executing code depending on - * the AVFilterContext->is_disabled value. - */ -#define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL (1 << 17) -/** - * Handy mask to test whether the filter supports or no the timeline feature - * (internally or generically). - */ -#define AVFILTER_FLAG_SUPPORT_TIMELINE (AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL) - -/** - * Filter definition. This defines the pads a filter contains, and all the - * callback functions used to interact with the filter. - */ -typedef struct AVFilter { - /** - * Filter name. Must be non-NULL and unique among filters. - */ - const char *name; - - /** - * A description of the filter. May be NULL. - * - * You should use the NULL_IF_CONFIG_SMALL() macro to define it. - */ - const char *description; - - /** - * List of inputs, terminated by a zeroed element. - * - * NULL if there are no (static) inputs. Instances of filters with - * AVFILTER_FLAG_DYNAMIC_INPUTS set may have more inputs than present in - * this list. - */ - const AVFilterPad *inputs; - /** - * List of outputs, terminated by a zeroed element. - * - * NULL if there are no (static) outputs. Instances of filters with - * AVFILTER_FLAG_DYNAMIC_OUTPUTS set may have more outputs than present in - * this list. - */ - const AVFilterPad *outputs; - - /** - * A class for the private data, used to declare filter private AVOptions. - * This field is NULL for filters that do not declare any options. - * - * If this field is non-NULL, the first member of the filter private data - * must be a pointer to AVClass, which will be set by libavfilter generic - * code to this class. - */ - const AVClass *priv_class; - - /** - * A combination of AVFILTER_FLAG_* - */ - int flags; - - /***************************************************************** - * All fields below this line are not part of the public API. They - * may not be used outside of libavfilter and can be changed and - * removed at will. - * New public fields should be added right above. - ***************************************************************** - */ - - /** - * Filter initialization function. - * - * This callback will be called only once during the filter lifetime, after - * all the options have been set, but before links between filters are - * established and format negotiation is done. - * - * Basic filter initialization should be done here. Filters with dynamic - * inputs and/or outputs should create those inputs/outputs here based on - * provided options. No more changes to this filter's inputs/outputs can be - * done after this callback. - * - * This callback must not assume that the filter links exist or frame - * parameters are known. - * - * @ref AVFilter.uninit "uninit" is guaranteed to be called even if - * initialization fails, so this callback does not have to clean up on - * failure. - * - * @return 0 on success, a negative AVERROR on failure - */ - int (*init)(AVFilterContext *ctx); - - /** - * Should be set instead of @ref AVFilter.init "init" by the filters that - * want to pass a dictionary of AVOptions to nested contexts that are - * allocated during init. - * - * On return, the options dict should be freed and replaced with one that - * contains all the options which could not be processed by this filter (or - * with NULL if all the options were processed). - * - * Otherwise the semantics is the same as for @ref AVFilter.init "init". - */ - int (*init_dict)(AVFilterContext *ctx, AVDictionary **options); - - /** - * Filter uninitialization function. - * - * Called only once right before the filter is freed. Should deallocate any - * memory held by the filter, release any buffer references, etc. It does - * not need to deallocate the AVFilterContext.priv memory itself. - * - * This callback may be called even if @ref AVFilter.init "init" was not - * called or failed, so it must be prepared to handle such a situation. - */ - void (*uninit)(AVFilterContext *ctx); - - /** - * Query formats supported by the filter on its inputs and outputs. - * - * This callback is called after the filter is initialized (so the inputs - * and outputs are fixed), shortly before the format negotiation. This - * callback may be called more than once. - * - * This callback must set AVFilterLink.out_formats on every input link and - * AVFilterLink.in_formats on every output link to a list of pixel/sample - * formats that the filter supports on that link. For audio links, this - * filter must also set @ref AVFilterLink.in_samplerates "in_samplerates" / - * @ref AVFilterLink.out_samplerates "out_samplerates" and - * @ref AVFilterLink.in_channel_layouts "in_channel_layouts" / - * @ref AVFilterLink.out_channel_layouts "out_channel_layouts" analogously. - * - * This callback may be NULL for filters with one input, in which case - * libavfilter assumes that it supports all input formats and preserves - * them on output. - * - * @return zero on success, a negative value corresponding to an - * AVERROR code otherwise - */ - int (*query_formats)(AVFilterContext *); - - int priv_size; ///< size of private data to allocate for the filter - - /** - * Used by the filter registration system. Must not be touched by any other - * code. - */ - struct AVFilter *next; - - /** - * Make the filter instance process a command. - * - * @param cmd the command to process, for handling simplicity all commands must be alphanumeric only - * @param arg the argument for the command - * @param res a buffer with size res_size where the filter(s) can return a response. This must not change when the command is not supported. - * @param flags if AVFILTER_CMD_FLAG_FAST is set and the command would be - * time consuming then a filter should treat it like an unsupported command - * - * @returns >=0 on success otherwise an error code. - * AVERROR(ENOSYS) on unsupported commands - */ - int (*process_command)(AVFilterContext *, const char *cmd, const char *arg, char *res, int res_len, int flags); - - /** - * Filter initialization function, alternative to the init() - * callback. Args contains the user-supplied parameters, opaque is - * used for providing binary data. - */ - int (*init_opaque)(AVFilterContext *ctx, void *opaque); -} AVFilter; - -/** - * Process multiple parts of the frame concurrently. - */ -#define AVFILTER_THREAD_SLICE (1 << 0) - -typedef struct AVFilterInternal AVFilterInternal; - -/** An instance of a filter */ -struct AVFilterContext { - const AVClass *av_class; ///< needed for av_log() and filters common options - - const AVFilter *filter; ///< the AVFilter of which this is an instance - - char *name; ///< name of this filter instance - - AVFilterPad *input_pads; ///< array of input pads - AVFilterLink **inputs; ///< array of pointers to input links - unsigned nb_inputs; ///< number of input pads - - AVFilterPad *output_pads; ///< array of output pads - AVFilterLink **outputs; ///< array of pointers to output links - unsigned nb_outputs; ///< number of output pads - - void *priv; ///< private data for use by the filter - - struct AVFilterGraph *graph; ///< filtergraph this filter belongs to - - /** - * Type of multithreading being allowed/used. A combination of - * AVFILTER_THREAD_* flags. - * - * May be set by the caller before initializing the filter to forbid some - * or all kinds of multithreading for this filter. The default is allowing - * everything. - * - * When the filter is initialized, this field is combined using bit AND with - * AVFilterGraph.thread_type to get the final mask used for determining - * allowed threading types. I.e. a threading type needs to be set in both - * to be allowed. - * - * After the filter is initialized, libavfilter sets this field to the - * threading type that is actually used (0 for no multithreading). - */ - int thread_type; - - /** - * An opaque struct for libavfilter internal use. - */ - AVFilterInternal *internal; - - struct AVFilterCommand *command_queue; - - char *enable_str; ///< enable expression string - void *enable; ///< parsed expression (AVExpr*) - double *var_values; ///< variable values for the enable expression - int is_disabled; ///< the enabled state from the last expression evaluation -}; - -/** - * A link between two filters. This contains pointers to the source and - * destination filters between which this link exists, and the indexes of - * the pads involved. In addition, this link also contains the parameters - * which have been negotiated and agreed upon between the filter, such as - * image dimensions, format, etc. - */ -struct AVFilterLink { - AVFilterContext *src; ///< source filter - AVFilterPad *srcpad; ///< output pad on the source filter - - AVFilterContext *dst; ///< dest filter - AVFilterPad *dstpad; ///< input pad on the dest filter - - enum AVMediaType type; ///< filter media type - - /* These parameters apply only to video */ - int w; ///< agreed upon image width - int h; ///< agreed upon image height - AVRational sample_aspect_ratio; ///< agreed upon sample aspect ratio - /* These parameters apply only to audio */ - uint64_t channel_layout; ///< channel layout of current buffer (see libavutil/channel_layout.h) - int sample_rate; ///< samples per second - - int format; ///< agreed upon media format - - /** - * Define the time base used by the PTS of the frames/samples - * which will pass through this link. - * During the configuration stage, each filter is supposed to - * change only the output timebase, while the timebase of the - * input link is assumed to be an unchangeable property. - */ - AVRational time_base; - - /***************************************************************** - * All fields below this line are not part of the public API. They - * may not be used outside of libavfilter and can be changed and - * removed at will. - * New public fields should be added right above. - ***************************************************************** - */ - /** - * Lists of formats and channel layouts supported by the input and output - * filters respectively. These lists are used for negotiating the format - * to actually be used, which will be loaded into the format and - * channel_layout members, above, when chosen. - * - */ - AVFilterFormats *in_formats; - AVFilterFormats *out_formats; - - /** - * Lists of channel layouts and sample rates used for automatic - * negotiation. - */ - AVFilterFormats *in_samplerates; - AVFilterFormats *out_samplerates; - struct AVFilterChannelLayouts *in_channel_layouts; - struct AVFilterChannelLayouts *out_channel_layouts; - - /** - * Audio only, the destination filter sets this to a non-zero value to - * request that buffers with the given number of samples should be sent to - * it. AVFilterPad.needs_fifo must also be set on the corresponding input - * pad. - * Last buffer before EOF will be padded with silence. - */ - int request_samples; - - /** stage of the initialization of the link properties (dimensions, etc) */ - enum { - AVLINK_UNINIT = 0, ///< not started - AVLINK_STARTINIT, ///< started, but incomplete - AVLINK_INIT ///< complete - } init_state; - - /** - * Graph the filter belongs to. - */ - struct AVFilterGraph *graph; - - /** - * Current timestamp of the link, as defined by the most recent - * frame(s), in link time_base units. - */ - int64_t current_pts; - - /** - * Current timestamp of the link, as defined by the most recent - * frame(s), in AV_TIME_BASE units. - */ - int64_t current_pts_us; - - /** - * Index in the age array. - */ - int age_index; - - /** - * Frame rate of the stream on the link, or 1/0 if unknown or variable; - * if left to 0/0, will be automatically copied from the first input - * of the source filter if it exists. - * - * Sources should set it to the best estimation of the real frame rate. - * If the source frame rate is unknown or variable, set this to 1/0. - * Filters should update it if necessary depending on their function. - * Sinks can use it to set a default output frame rate. - * It is similar to the r_frame_rate field in AVStream. - */ - AVRational frame_rate; - - /** - * Buffer partially filled with samples to achieve a fixed/minimum size. - */ - AVFrame *partial_buf; - - /** - * Size of the partial buffer to allocate. - * Must be between min_samples and max_samples. - */ - int partial_buf_size; - - /** - * Minimum number of samples to filter at once. If filter_frame() is - * called with fewer samples, it will accumulate them in partial_buf. - * This field and the related ones must not be changed after filtering - * has started. - * If 0, all related fields are ignored. - */ - int min_samples; - - /** - * Maximum number of samples to filter at once. If filter_frame() is - * called with more samples, it will split them. - */ - int max_samples; - - /** - * Link status. - * If not zero, all attempts of filter_frame or request_frame - * will fail with the corresponding code, and if necessary the reference - * will be destroyed. - * If request_frame returns an error, the status is set on the - * corresponding link. - * It can be set also be set by either the source or the destination - * filter. - */ - int status; - - /** - * Number of channels. - */ - int channels; - - /** - * Link processing flags. - */ - unsigned flags; - - /** - * Number of past frames sent through the link. - */ - int64_t frame_count; - - /** - * A pointer to a FFVideoFramePool struct. - */ - void *video_frame_pool; - - /** - * True if a frame is currently wanted on the input of this filter. - * Set when ff_request_frame() is called by the output, - * cleared when the request is handled or forwarded. - */ - int frame_wanted_in; - - /** - * True if a frame is currently wanted on the output of this filter. - * Set when ff_request_frame() is called by the output, - * cleared when a frame is filtered. - */ - int frame_wanted_out; -}; - -/** - * Link two filters together. - * - * @param src the source filter - * @param srcpad index of the output pad on the source filter - * @param dst the destination filter - * @param dstpad index of the input pad on the destination filter - * @return zero on success - */ -int avfilter_link(AVFilterContext *src, unsigned srcpad, - AVFilterContext *dst, unsigned dstpad); - -/** - * Free the link in *link, and set its pointer to NULL. - */ -void avfilter_link_free(AVFilterLink **link); - -/** - * Get the number of channels of a link. - */ -int avfilter_link_get_channels(AVFilterLink *link); - -/** - * Set the closed field of a link. - * @deprecated applications are not supposed to mess with links, they should - * close the sinks. - */ -attribute_deprecated -void avfilter_link_set_closed(AVFilterLink *link, int closed); - -/** - * Negotiate the media format, dimensions, etc of all inputs to a filter. - * - * @param filter the filter to negotiate the properties for its inputs - * @return zero on successful negotiation - */ -int avfilter_config_links(AVFilterContext *filter); - -#define AVFILTER_CMD_FLAG_ONE 1 ///< Stop once a filter understood the command (for target=all for example), fast filters are favored automatically -#define AVFILTER_CMD_FLAG_FAST 2 ///< Only execute command when its fast (like a video out that supports contrast adjustment in hw) - -/** - * Make the filter instance process a command. - * It is recommended to use avfilter_graph_send_command(). - */ -int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags); - -/** Initialize the filter system. Register all builtin filters. */ -void avfilter_register_all(void); - -#if FF_API_OLD_FILTER_REGISTER -/** Uninitialize the filter system. Unregister all filters. */ -attribute_deprecated -void avfilter_uninit(void); -#endif - -/** - * Register a filter. This is only needed if you plan to use - * avfilter_get_by_name later to lookup the AVFilter structure by name. A - * filter can still by instantiated with avfilter_graph_alloc_filter even if it - * is not registered. - * - * @param filter the filter to register - * @return 0 if the registration was successful, a negative value - * otherwise - */ -int avfilter_register(AVFilter *filter); - -/** - * Get a filter definition matching the given name. - * - * @param name the filter name to find - * @return the filter definition, if any matching one is registered. - * NULL if none found. - */ -#if !FF_API_NOCONST_GET_NAME -const -#endif -AVFilter *avfilter_get_by_name(const char *name); - -/** - * Iterate over all registered filters. - * @return If prev is non-NULL, next registered filter after prev or NULL if - * prev is the last filter. If prev is NULL, return the first registered filter. - */ -const AVFilter *avfilter_next(const AVFilter *prev); - -#if FF_API_OLD_FILTER_REGISTER -/** - * If filter is NULL, returns a pointer to the first registered filter pointer, - * if filter is non-NULL, returns the next pointer after filter. - * If the returned pointer points to NULL, the last registered filter - * was already reached. - * @deprecated use avfilter_next() - */ -attribute_deprecated -AVFilter **av_filter_next(AVFilter **filter); -#endif - -#if FF_API_AVFILTER_OPEN -/** - * Create a filter instance. - * - * @param filter_ctx put here a pointer to the created filter context - * on success, NULL on failure - * @param filter the filter to create an instance of - * @param inst_name Name to give to the new instance. Can be NULL for none. - * @return >= 0 in case of success, a negative error code otherwise - * @deprecated use avfilter_graph_alloc_filter() instead - */ -attribute_deprecated -int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name); -#endif - - -#if FF_API_AVFILTER_INIT_FILTER -/** - * Initialize a filter. - * - * @param filter the filter to initialize - * @param args A string of parameters to use when initializing the filter. - * The format and meaning of this string varies by filter. - * @param opaque Any extra non-string data needed by the filter. The meaning - * of this parameter varies by filter. - * @return zero on success - */ -attribute_deprecated -int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque); -#endif - -/** - * Initialize a filter with the supplied parameters. - * - * @param ctx uninitialized filter context to initialize - * @param args Options to initialize the filter with. This must be a - * ':'-separated list of options in the 'key=value' form. - * May be NULL if the options have been set directly using the - * AVOptions API or there are no options that need to be set. - * @return 0 on success, a negative AVERROR on failure - */ -int avfilter_init_str(AVFilterContext *ctx, const char *args); - -/** - * Initialize a filter with the supplied dictionary of options. - * - * @param ctx uninitialized filter context to initialize - * @param options An AVDictionary filled with options for this filter. On - * return this parameter will be destroyed and replaced with - * a dict containing options that were not found. This dictionary - * must be freed by the caller. - * May be NULL, then this function is equivalent to - * avfilter_init_str() with the second parameter set to NULL. - * @return 0 on success, a negative AVERROR on failure - * - * @note This function and avfilter_init_str() do essentially the same thing, - * the difference is in manner in which the options are passed. It is up to the - * calling code to choose whichever is more preferable. The two functions also - * behave differently when some of the provided options are not declared as - * supported by the filter. In such a case, avfilter_init_str() will fail, but - * this function will leave those extra options in the options AVDictionary and - * continue as usual. - */ -int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options); - -/** - * Free a filter context. This will also remove the filter from its - * filtergraph's list of filters. - * - * @param filter the filter to free - */ -void avfilter_free(AVFilterContext *filter); - -/** - * Insert a filter in the middle of an existing link. - * - * @param link the link into which the filter should be inserted - * @param filt the filter to be inserted - * @param filt_srcpad_idx the input pad on the filter to connect - * @param filt_dstpad_idx the output pad on the filter to connect - * @return zero on success - */ -int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt, - unsigned filt_srcpad_idx, unsigned filt_dstpad_idx); - -/** - * @return AVClass for AVFilterContext. - * - * @see av_opt_find(). - */ -const AVClass *avfilter_get_class(void); - -typedef struct AVFilterGraphInternal AVFilterGraphInternal; - -/** - * A function pointer passed to the @ref AVFilterGraph.execute callback to be - * executed multiple times, possibly in parallel. - * - * @param ctx the filter context the job belongs to - * @param arg an opaque parameter passed through from @ref - * AVFilterGraph.execute - * @param jobnr the index of the job being executed - * @param nb_jobs the total number of jobs - * - * @return 0 on success, a negative AVERROR on error - */ -typedef int (avfilter_action_func)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs); - -/** - * A function executing multiple jobs, possibly in parallel. - * - * @param ctx the filter context to which the jobs belong - * @param func the function to be called multiple times - * @param arg the argument to be passed to func - * @param ret a nb_jobs-sized array to be filled with return values from each - * invocation of func - * @param nb_jobs the number of jobs to execute - * - * @return 0 on success, a negative AVERROR on error - */ -typedef int (avfilter_execute_func)(AVFilterContext *ctx, avfilter_action_func *func, - void *arg, int *ret, int nb_jobs); - -typedef struct AVFilterGraph { - const AVClass *av_class; - AVFilterContext **filters; - unsigned nb_filters; - - char *scale_sws_opts; ///< sws options to use for the auto-inserted scale filters - char *resample_lavr_opts; ///< libavresample options to use for the auto-inserted resample filters - - /** - * Type of multithreading allowed for filters in this graph. A combination - * of AVFILTER_THREAD_* flags. - * - * May be set by the caller at any point, the setting will apply to all - * filters initialized after that. The default is allowing everything. - * - * When a filter in this graph is initialized, this field is combined using - * bit AND with AVFilterContext.thread_type to get the final mask used for - * determining allowed threading types. I.e. a threading type needs to be - * set in both to be allowed. - */ - int thread_type; - - /** - * Maximum number of threads used by filters in this graph. May be set by - * the caller before adding any filters to the filtergraph. Zero (the - * default) means that the number of threads is determined automatically. - */ - int nb_threads; - - /** - * Opaque object for libavfilter internal use. - */ - AVFilterGraphInternal *internal; - - /** - * Opaque user data. May be set by the caller to an arbitrary value, e.g. to - * be used from callbacks like @ref AVFilterGraph.execute. - * Libavfilter will not touch this field in any way. - */ - void *opaque; - - /** - * This callback may be set by the caller immediately after allocating the - * graph and before adding any filters to it, to provide a custom - * multithreading implementation. - * - * If set, filters with slice threading capability will call this callback - * to execute multiple jobs in parallel. - * - * If this field is left unset, libavfilter will use its internal - * implementation, which may or may not be multithreaded depending on the - * platform and build options. - */ - avfilter_execute_func *execute; - - char *aresample_swr_opts; ///< swr options to use for the auto-inserted aresample filters, Access ONLY through AVOptions - - /** - * Private fields - * - * The following fields are for internal use only. - * Their type, offset, number and semantic can change without notice. - */ - - AVFilterLink **sink_links; - int sink_links_count; - - unsigned disable_auto_convert; -} AVFilterGraph; - -/** - * Allocate a filter graph. - * - * @return the allocated filter graph on success or NULL. - */ -AVFilterGraph *avfilter_graph_alloc(void); - -/** - * Create a new filter instance in a filter graph. - * - * @param graph graph in which the new filter will be used - * @param filter the filter to create an instance of - * @param name Name to give to the new instance (will be copied to - * AVFilterContext.name). This may be used by the caller to identify - * different filters, libavfilter itself assigns no semantics to - * this parameter. May be NULL. - * - * @return the context of the newly created filter instance (note that it is - * also retrievable directly through AVFilterGraph.filters or with - * avfilter_graph_get_filter()) on success or NULL on failure. - */ -AVFilterContext *avfilter_graph_alloc_filter(AVFilterGraph *graph, - const AVFilter *filter, - const char *name); - -/** - * Get a filter instance identified by instance name from graph. - * - * @param graph filter graph to search through. - * @param name filter instance name (should be unique in the graph). - * @return the pointer to the found filter instance or NULL if it - * cannot be found. - */ -AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, const char *name); - -#if FF_API_AVFILTER_OPEN -/** - * Add an existing filter instance to a filter graph. - * - * @param graphctx the filter graph - * @param filter the filter to be added - * - * @deprecated use avfilter_graph_alloc_filter() to allocate a filter in a - * filter graph - */ -attribute_deprecated -int avfilter_graph_add_filter(AVFilterGraph *graphctx, AVFilterContext *filter); -#endif - -/** - * Create and add a filter instance into an existing graph. - * The filter instance is created from the filter filt and inited - * with the parameters args and opaque. - * - * In case of success put in *filt_ctx the pointer to the created - * filter instance, otherwise set *filt_ctx to NULL. - * - * @param name the instance name to give to the created filter instance - * @param graph_ctx the filter graph - * @return a negative AVERROR error code in case of failure, a non - * negative value otherwise - */ -int avfilter_graph_create_filter(AVFilterContext **filt_ctx, const AVFilter *filt, - const char *name, const char *args, void *opaque, - AVFilterGraph *graph_ctx); - -/** - * Enable or disable automatic format conversion inside the graph. - * - * Note that format conversion can still happen inside explicitly inserted - * scale and aresample filters. - * - * @param flags any of the AVFILTER_AUTO_CONVERT_* constants - */ -void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags); - -enum { - AVFILTER_AUTO_CONVERT_ALL = 0, /**< all automatic conversions enabled */ - AVFILTER_AUTO_CONVERT_NONE = -1, /**< all automatic conversions disabled */ -}; - -/** - * Check validity and configure all the links and formats in the graph. - * - * @param graphctx the filter graph - * @param log_ctx context used for logging - * @return >= 0 in case of success, a negative AVERROR code otherwise - */ -int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx); - -/** - * Free a graph, destroy its links, and set *graph to NULL. - * If *graph is NULL, do nothing. - */ -void avfilter_graph_free(AVFilterGraph **graph); - -/** - * A linked-list of the inputs/outputs of the filter chain. - * - * This is mainly useful for avfilter_graph_parse() / avfilter_graph_parse2(), - * where it is used to communicate open (unlinked) inputs and outputs from and - * to the caller. - * This struct specifies, per each not connected pad contained in the graph, the - * filter context and the pad index required for establishing a link. - */ -typedef struct AVFilterInOut { - /** unique name for this input/output in the list */ - char *name; - - /** filter context associated to this input/output */ - AVFilterContext *filter_ctx; - - /** index of the filt_ctx pad to use for linking */ - int pad_idx; - - /** next input/input in the list, NULL if this is the last */ - struct AVFilterInOut *next; -} AVFilterInOut; - -/** - * Allocate a single AVFilterInOut entry. - * Must be freed with avfilter_inout_free(). - * @return allocated AVFilterInOut on success, NULL on failure. - */ -AVFilterInOut *avfilter_inout_alloc(void); - -/** - * Free the supplied list of AVFilterInOut and set *inout to NULL. - * If *inout is NULL, do nothing. - */ -void avfilter_inout_free(AVFilterInOut **inout); - -/** - * Add a graph described by a string to a graph. - * - * @note The caller must provide the lists of inputs and outputs, - * which therefore must be known before calling the function. - * - * @note The inputs parameter describes inputs of the already existing - * part of the graph; i.e. from the point of view of the newly created - * part, they are outputs. Similarly the outputs parameter describes - * outputs of the already existing filters, which are provided as - * inputs to the parsed filters. - * - * @param graph the filter graph where to link the parsed graph context - * @param filters string to be parsed - * @param inputs linked list to the inputs of the graph - * @param outputs linked list to the outputs of the graph - * @return zero on success, a negative AVERROR code on error - */ -int avfilter_graph_parse(AVFilterGraph *graph, const char *filters, - AVFilterInOut *inputs, AVFilterInOut *outputs, - void *log_ctx); - -/** - * Add a graph described by a string to a graph. - * - * In the graph filters description, if the input label of the first - * filter is not specified, "in" is assumed; if the output label of - * the last filter is not specified, "out" is assumed. - * - * @param graph the filter graph where to link the parsed graph context - * @param filters string to be parsed - * @param inputs pointer to a linked list to the inputs of the graph, may be NULL. - * If non-NULL, *inputs is updated to contain the list of open inputs - * after the parsing, should be freed with avfilter_inout_free(). - * @param outputs pointer to a linked list to the outputs of the graph, may be NULL. - * If non-NULL, *outputs is updated to contain the list of open outputs - * after the parsing, should be freed with avfilter_inout_free(). - * @return non negative on success, a negative AVERROR code on error - */ -int avfilter_graph_parse_ptr(AVFilterGraph *graph, const char *filters, - AVFilterInOut **inputs, AVFilterInOut **outputs, - void *log_ctx); - -/** - * Add a graph described by a string to a graph. - * - * @param[in] graph the filter graph where to link the parsed graph context - * @param[in] filters string to be parsed - * @param[out] inputs a linked list of all free (unlinked) inputs of the - * parsed graph will be returned here. It is to be freed - * by the caller using avfilter_inout_free(). - * @param[out] outputs a linked list of all free (unlinked) outputs of the - * parsed graph will be returned here. It is to be freed by the - * caller using avfilter_inout_free(). - * @return zero on success, a negative AVERROR code on error - * - * @note This function returns the inputs and outputs that are left - * unlinked after parsing the graph and the caller then deals with - * them. - * @note This function makes no reference whatsoever to already - * existing parts of the graph and the inputs parameter will on return - * contain inputs of the newly parsed part of the graph. Analogously - * the outputs parameter will contain outputs of the newly created - * filters. - */ -int avfilter_graph_parse2(AVFilterGraph *graph, const char *filters, - AVFilterInOut **inputs, - AVFilterInOut **outputs); - -/** - * Send a command to one or more filter instances. - * - * @param graph the filter graph - * @param target the filter(s) to which the command should be sent - * "all" sends to all filters - * otherwise it can be a filter or filter instance name - * which will send the command to all matching filters. - * @param cmd the command to send, for handling simplicity all commands must be alphanumeric only - * @param arg the argument for the command - * @param res a buffer with size res_size where the filter(s) can return a response. - * - * @returns >=0 on success otherwise an error code. - * AVERROR(ENOSYS) on unsupported commands - */ -int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags); - -/** - * Queue a command for one or more filter instances. - * - * @param graph the filter graph - * @param target the filter(s) to which the command should be sent - * "all" sends to all filters - * otherwise it can be a filter or filter instance name - * which will send the command to all matching filters. - * @param cmd the command to sent, for handling simplicity all commands must be alphanumeric only - * @param arg the argument for the command - * @param ts time at which the command should be sent to the filter - * - * @note As this executes commands after this function returns, no return code - * from the filter is provided, also AVFILTER_CMD_FLAG_ONE is not supported. - */ -int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, int flags, double ts); - - -/** - * Dump a graph into a human-readable string representation. - * - * @param graph the graph to dump - * @param options formatting options; currently ignored - * @return a string, or NULL in case of memory allocation failure; - * the string must be freed using av_free - */ -char *avfilter_graph_dump(AVFilterGraph *graph, const char *options); - -/** - * Request a frame on the oldest sink link. - * - * If the request returns AVERROR_EOF, try the next. - * - * Note that this function is not meant to be the sole scheduling mechanism - * of a filtergraph, only a convenience function to help drain a filtergraph - * in a balanced way under normal circumstances. - * - * Also note that AVERROR_EOF does not mean that frames did not arrive on - * some of the sinks during the process. - * When there are multiple sink links, in case the requested link - * returns an EOF, this may cause a filter to flush pending frames - * which are sent to another sink link, although unrequested. - * - * @return the return value of ff_request_frame(), - * or AVERROR_EOF if all links returned AVERROR_EOF - */ -int avfilter_graph_request_oldest(AVFilterGraph *graph); - -/** - * @} - */ - -#endif /* AVFILTER_AVFILTER_H */