| /* |
| * 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_INTERNAL_H |
| #define AVFILTER_INTERNAL_H |
| |
| /** |
| * @file |
| * internal API functions |
| */ |
| |
| #include "libavutil/internal.h" |
| #include "avfilter.h" |
| #include "formats.h" |
| #include "framepool.h" |
| #include "framequeue.h" |
| #include "thread.h" |
| #include "version.h" |
| #include "video.h" |
| #include "libavcodec/avcodec.h" |
| #include "libavcodec/internal.h" |
| |
| typedef struct AVFilterCommand { |
| double time; ///< time expressed in seconds |
| char *command; ///< command |
| char *arg; ///< optional argument for the command |
| int flags; |
| struct AVFilterCommand *next; |
| } AVFilterCommand; |
| |
| /** |
| * Update the position of a link in the age heap. |
| */ |
| void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link); |
| |
| /** |
| * 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; |
| |
| /** |
| * Callback function to get a video buffer. If NULL, the filter system will |
| * use ff_default_get_video_buffer(). |
| * |
| * Input video pads only. |
| */ |
| AVFrame *(*get_video_buffer)(AVFilterLink *link, int w, int h); |
| |
| /** |
| * Callback function to get an audio buffer. If NULL, the filter system will |
| * use ff_default_get_audio_buffer(). |
| * |
| * Input audio pads only. |
| */ |
| AVFrame *(*get_audio_buffer)(AVFilterLink *link, int nb_samples); |
| |
| /** |
| * Filtering callback. This is where a filter receives a frame with |
| * audio/video data and should do its processing. |
| * |
| * Input pads only. |
| * |
| * @return >= 0 on success, a negative AVERROR on error. This function |
| * must ensure that frame is properly unreferenced on error if it |
| * hasn't been passed on to another filter. |
| */ |
| int (*filter_frame)(AVFilterLink *link, AVFrame *frame); |
| |
| /** |
| * Frame request callback. A call to this should result in some progress |
| * towards producing 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 writable frames from its input link, |
| * duplicating data buffers if needed. |
| * |
| * input pads only. |
| */ |
| int needs_writable; |
| }; |
| |
| struct AVFilterGraphInternal { |
| void *thread; |
| avfilter_execute_func *thread_execute; |
| FFFrameQueueGlobal frame_queues; |
| }; |
| |
| struct AVFilterInternal { |
| avfilter_execute_func *execute; |
| }; |
| |
| /** |
| * Tell if an integer is contained in the provided -1-terminated list of integers. |
| * This is useful for determining (for instance) if an AVPixelFormat is in an |
| * array of supported formats. |
| * |
| * @param fmt provided format |
| * @param fmts -1-terminated list of formats |
| * @return 1 if present, 0 if absent |
| */ |
| int ff_fmt_is_in(int fmt, const int *fmts); |
| |
| /* Functions to parse audio format arguments */ |
| |
| /** |
| * Parse a pixel format. |
| * |
| * @param ret pixel format pointer to where the value should be written |
| * @param arg string to parse |
| * @param log_ctx log context |
| * @return >= 0 in case of success, a negative AVERROR code on error |
| */ |
| av_warn_unused_result |
| int ff_parse_pixel_format(enum AVPixelFormat *ret, const char *arg, void *log_ctx); |
| |
| /** |
| * Parse a sample rate. |
| * |
| * @param ret unsigned integer pointer to where the value should be written |
| * @param arg string to parse |
| * @param log_ctx log context |
| * @return >= 0 in case of success, a negative AVERROR code on error |
| */ |
| av_warn_unused_result |
| int ff_parse_sample_rate(int *ret, const char *arg, void *log_ctx); |
| |
| /** |
| * Parse a channel layout or a corresponding integer representation. |
| * |
| * @param ret 64bit integer pointer to where the value should be written. |
| * @param nret integer pointer to the number of channels; |
| * if not NULL, then unknown channel layouts are accepted |
| * @param arg string to parse |
| * @param log_ctx log context |
| * @return >= 0 in case of success, a negative AVERROR code on error |
| */ |
| av_warn_unused_result |
| int ff_parse_channel_layout(int64_t *ret, int *nret, const char *arg, |
| void *log_ctx); |
| |
| void ff_update_link_current_pts(AVFilterLink *link, int64_t pts); |
| |
| /** |
| * Set the status field of a link from the source filter. |
| * The pts should reflect the timestamp of the status change, |
| * in link time base and relative to the frames timeline. |
| * In particular, for AVERROR_EOF, it should reflect the |
| * end time of the last frame. |
| */ |
| void ff_avfilter_link_set_in_status(AVFilterLink *link, int status, int64_t pts); |
| |
| /** |
| * Set the status field of a link from the destination filter. |
| * The pts should probably be left unset (AV_NOPTS_VALUE). |
| */ |
| void ff_avfilter_link_set_out_status(AVFilterLink *link, int status, int64_t pts); |
| |
| void ff_command_queue_pop(AVFilterContext *filter); |
| |
| #define D2TS(d) (isnan(d) ? AV_NOPTS_VALUE : (int64_t)(d)) |
| #define TS2D(ts) ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts)) |
| #define TS2T(ts, tb) ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts) * av_q2d(tb)) |
| |
| /* misc trace functions */ |
| |
| #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, AVFrame *ref, int end); |
| |
| void ff_tlog_link(void *ctx, AVFilterLink *link, int end); |
| |
| /** |
| * 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. |
| * @return >= 0 in case of success, a negative AVERROR code on error |
| */ |
| int 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 int ff_insert_inpad(AVFilterContext *f, unsigned index, |
| AVFilterPad *p) |
| { |
| return ff_insert_pad(index, &f->nb_inputs, offsetof(AVFilterLink, dstpad), |
| &f->input_pads, &f->inputs, p); |
| } |
| |
| /** Insert a new output pad for the filter. */ |
| static inline int ff_insert_outpad(AVFilterContext *f, unsigned index, |
| AVFilterPad *p) |
| { |
| return ff_insert_pad(index, &f->nb_outputs, offsetof(AVFilterLink, srcpad), |
| &f->output_pads, &f->outputs, p); |
| } |
| |
| /** |
| * Request an input frame from the filter at the other end of the link. |
| * |
| * This function must not be used by filters using the activate callback, |
| * use ff_link_set_frame_wanted() instead. |
| * |
| * The input filter may pass the request on to its inputs, fulfill the |
| * request from an internal buffer or any other means specific to its function. |
| * |
| * When the end of a stream is reached AVERROR_EOF is returned and no further |
| * frames are returned after that. |
| * |
| * When a filter is unable to output a frame for example due to its sources |
| * being unable to do so or because it depends on external means pushing data |
| * into it then AVERROR(EAGAIN) is returned. |
| * It is important that a AVERROR(EAGAIN) return is returned all the way to the |
| * caller (generally eventually a user application) as this step may (but does |
| * not have to be) necessary to provide the input with the next frame. |
| * |
| * If a request is successful then some progress has been made towards |
| * providing a frame on the link (through ff_filter_frame()). A filter that |
| * needs several frames to produce one is allowed to return success if one |
| * more frame has been processed but no output has been produced yet. A |
| * filter is also allowed to simply forward a success return value. |
| * |
| * @param link the input link |
| * @return zero on success |
| * AVERROR_EOF on end of file |
| * AVERROR(EAGAIN) if the previous filter cannot output a frame |
| * currently and can neither guarantee that EOF has been reached. |
| */ |
| 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, \ |
| } |
| |
| /** |
| * 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)) |
| |
| /** |
| * Send a frame of data to the next filter. |
| * |
| * @param link the output link over which the data is being sent |
| * @param frame a reference to the buffer of data being sent. The |
| * receiving filter will free this reference when it no longer |
| * needs it or pass it on to the next filter. |
| * |
| * @return >= 0 on success, a negative AVERROR on error. The receiving filter |
| * is responsible for unreferencing frame in case of error. |
| */ |
| int ff_filter_frame(AVFilterLink *link, AVFrame *frame); |
| |
| /** |
| * Allocate a new filter context and return it. |
| * |
| * @param filter what filter to create an instance of |
| * @param inst_name name to give to the new filter context |
| * |
| * @return newly created filter context or NULL on failure |
| */ |
| AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name); |
| |
| int ff_filter_activate(AVFilterContext *filter); |
| |
| /** |
| * Remove a filter from a graph; |
| */ |
| void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter); |
| |
| /** |
| * The filter is aware of hardware frames, and any hardware frame context |
| * should not be automatically propagated through it. |
| */ |
| #define FF_FILTER_FLAG_HWFRAME_AWARE (1 << 0) |
| |
| /** |
| * Run one round of processing on a filter graph. |
| */ |
| int ff_filter_graph_run_once(AVFilterGraph *graph); |
| |
| /** |
| * Normalize the qscale factor |
| * FIXME the H264 qscale is a log based scale, mpeg1/2 is not, the code below |
| * cannot be optimal |
| */ |
| static inline int ff_norm_qscale(int qscale, int type) |
| { |
| switch (type) { |
| case FF_QSCALE_TYPE_MPEG1: return qscale; |
| case FF_QSCALE_TYPE_MPEG2: return qscale >> 1; |
| case FF_QSCALE_TYPE_H264: return qscale >> 2; |
| case FF_QSCALE_TYPE_VP56: return (63 - qscale + 2) >> 2; |
| } |
| return qscale; |
| } |
| |
| /** |
| * Get number of threads for current filter instance. |
| * This number is always same or less than graph->nb_threads. |
| */ |
| int ff_filter_get_nb_threads(AVFilterContext *ctx); |
| |
| /** |
| * Generic processing of user supplied commands that are set |
| * in the same way as the filter options. |
| */ |
| int ff_filter_process_command(AVFilterContext *ctx, const char *cmd, |
| const char *arg, char *res, int res_len, int flags); |
| |
| /** |
| * Perform any additional setup required for hardware frames. |
| * |
| * link->hw_frames_ctx must be set before calling this function. |
| * Inside link->hw_frames_ctx, the fields format, sw_format, width and |
| * height must be set. If dynamically allocated pools are not supported, |
| * then initial_pool_size must also be set, to the minimum hardware frame |
| * pool size necessary for the filter to work (taking into account any |
| * frames which need to stored for use in operations as appropriate). If |
| * default_pool_size is nonzero, then it will be used as the pool size if |
| * no other modification takes place (this can be used to preserve |
| * compatibility). |
| */ |
| int ff_filter_init_hw_frames(AVFilterContext *avctx, AVFilterLink *link, |
| int default_pool_size); |
| |
| #endif /* AVFILTER_INTERNAL_H */ |