| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * This file is part of FFmpeg. | ||
| 3 | * | ||
| 4 | * FFmpeg is free software; you can redistribute it and/or | ||
| 5 | * modify it under the terms of the GNU Lesser General Public | ||
| 6 | * License as published by the Free Software Foundation; either | ||
| 7 | * version 2.1 of the License, or (at your option) any later version. | ||
| 8 | * | ||
| 9 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 12 | * Lesser General Public License for more details. | ||
| 13 | * | ||
| 14 | * You should have received a copy of the GNU Lesser General Public | ||
| 15 | * License along with FFmpeg; if not, write to the Free Software | ||
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 17 | */ | ||
| 18 | |||
| 19 | /* | ||
| 20 | * APIs internal to the generic filter(graph) layer. | ||
| 21 | * | ||
| 22 | * MUST NOT be included by individual filters. | ||
| 23 | */ | ||
| 24 | |||
| 25 | #ifndef AVFILTER_AVFILTER_INTERNAL_H | ||
| 26 | #define AVFILTER_AVFILTER_INTERNAL_H | ||
| 27 | |||
| 28 | #include <stdint.h> | ||
| 29 | |||
| 30 | #include "libavutil/framepool.h" | ||
| 31 | |||
| 32 | #include "avfilter.h" | ||
| 33 | #include "filters.h" | ||
| 34 | #include "framequeue.h" | ||
| 35 | |||
| 36 | typedef struct FilterLinkInternal { | ||
| 37 | FilterLink l; | ||
| 38 | |||
| 39 | /** | ||
| 40 | * Pool of frames used for allocations. | ||
| 41 | */ | ||
| 42 | FFFramePool frame_pool; | ||
| 43 | |||
| 44 | /** | ||
| 45 | * Queue of frames waiting to be filtered. | ||
| 46 | */ | ||
| 47 | FFFrameQueue fifo; | ||
| 48 | |||
| 49 | /** | ||
| 50 | * Format and size of the video frames the link was configured with. | ||
| 51 | */ | ||
| 52 | int cfg_format, cfg_w, cfg_h; | ||
| 53 | |||
| 54 | /** | ||
| 55 | * If set, the source filter can not generate a frame as is. | ||
| 56 | * The goal is to avoid repeatedly calling the request_frame() method on | ||
| 57 | * the same link. | ||
| 58 | */ | ||
| 59 | int frame_blocked_in; | ||
| 60 | |||
| 61 | /** | ||
| 62 | * Link input status. | ||
| 63 | * If not zero, all attempts of filter_frame will fail with the | ||
| 64 | * corresponding code. | ||
| 65 | */ | ||
| 66 | int status_in; | ||
| 67 | |||
| 68 | /** | ||
| 69 | * Timestamp of the input status change. | ||
| 70 | */ | ||
| 71 | int64_t status_in_pts; | ||
| 72 | |||
| 73 | /** | ||
| 74 | * Link output status. | ||
| 75 | * If not zero, all attempts of request_frame will fail with the | ||
| 76 | * corresponding code. | ||
| 77 | */ | ||
| 78 | int status_out; | ||
| 79 | |||
| 80 | /** | ||
| 81 | * True if a frame is currently wanted on the output of this filter. | ||
| 82 | * Set when ff_request_frame() is called by the output, | ||
| 83 | * cleared when a frame is filtered. | ||
| 84 | */ | ||
| 85 | int frame_wanted_out; | ||
| 86 | |||
| 87 | /** | ||
| 88 | * Index in the age array. | ||
| 89 | */ | ||
| 90 | int age_index; | ||
| 91 | |||
| 92 | /** stage of the initialization of the link properties (dimensions, etc) */ | ||
| 93 | enum { | ||
| 94 | AVLINK_UNINIT = 0, ///< not started | ||
| 95 | AVLINK_STARTINIT, ///< started, but incomplete | ||
| 96 | AVLINK_INIT ///< complete | ||
| 97 | } init_state; | ||
| 98 | } FilterLinkInternal; | ||
| 99 | |||
| 100 | 37879304 | static inline FilterLinkInternal *ff_link_internal(AVFilterLink *link) | |
| 101 | { | ||
| 102 | 37879304 | return (FilterLinkInternal*)link; | |
| 103 | } | ||
| 104 | |||
| 105 | typedef struct FFFilterContext { | ||
| 106 | /** | ||
| 107 | * The public AVFilterContext. See avfilter.h for it. | ||
| 108 | */ | ||
| 109 | AVFilterContext p; | ||
| 110 | |||
| 111 | avfilter_execute_func *execute; | ||
| 112 | |||
| 113 | // AV_CLASS_STATE_FLAG_* | ||
| 114 | unsigned state_flags; | ||
| 115 | |||
| 116 | /** | ||
| 117 | * Ready status of the filter. | ||
| 118 | * A non-0 value means that the filter needs activating; | ||
| 119 | * a higher value suggests a more urgent activation. | ||
| 120 | */ | ||
| 121 | unsigned ready; | ||
| 122 | |||
| 123 | /// parsed expression | ||
| 124 | struct AVExpr *enable; | ||
| 125 | /// variable values for the enable expression | ||
| 126 | double *var_values; | ||
| 127 | |||
| 128 | struct AVFilterCommand *command_queue; | ||
| 129 | } FFFilterContext; | ||
| 130 | |||
| 131 | 45619875 | static inline FFFilterContext *fffilterctx(AVFilterContext *ctx) | |
| 132 | { | ||
| 133 | 45619875 | return (FFFilterContext*)ctx; | |
| 134 | } | ||
| 135 | |||
| 136 | typedef struct AVFilterCommand { | ||
| 137 | double time; ///< time expressed in seconds | ||
| 138 | char *command; ///< command | ||
| 139 | char *arg; ///< optional argument for the command | ||
| 140 | int flags; | ||
| 141 | struct AVFilterCommand *next; | ||
| 142 | } AVFilterCommand; | ||
| 143 | |||
| 144 | typedef struct FFFilterGraph { | ||
| 145 | /** | ||
| 146 | * The public AVFilterGraph. See avfilter.h for it. | ||
| 147 | */ | ||
| 148 | AVFilterGraph p; | ||
| 149 | |||
| 150 | struct FilterLinkInternal **sink_links; | ||
| 151 | int sink_links_count; | ||
| 152 | |||
| 153 | unsigned disable_auto_convert; | ||
| 154 | |||
| 155 | void *thread; | ||
| 156 | avfilter_execute_func *thread_execute; | ||
| 157 | FFFrameQueueGlobal frame_queues[AVMEDIA_TYPE_NB]; | ||
| 158 | /* set by avfilter_graph_set_max_buffered_frames() */ | ||
| 159 | uint8_t max_queued_set[AVMEDIA_TYPE_NB]; | ||
| 160 | } FFFilterGraph; | ||
| 161 | |||
| 162 | 1119618 | static inline FFFilterGraph *fffiltergraph(AVFilterGraph *graph) | |
| 163 | { | ||
| 164 | 1119618 | return (FFFilterGraph*)graph; | |
| 165 | } | ||
| 166 | |||
| 167 | /** | ||
| 168 | * Update the position of a link in the age heap. | ||
| 169 | */ | ||
| 170 | void ff_avfilter_graph_update_heap(AVFilterGraph *graph, | ||
| 171 | struct FilterLinkInternal *li); | ||
| 172 | |||
| 173 | /** | ||
| 174 | * Allocate a new filter context and return it. | ||
| 175 | * | ||
| 176 | * @param filter what filter to create an instance of | ||
| 177 | * @param inst_name name to give to the new filter context | ||
| 178 | * | ||
| 179 | * @return newly created filter context or NULL on failure | ||
| 180 | */ | ||
| 181 | AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name); | ||
| 182 | |||
| 183 | /** | ||
| 184 | * Remove a filter from a graph; | ||
| 185 | */ | ||
| 186 | void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter); | ||
| 187 | |||
| 188 | int ff_filter_activate(AVFilterContext *filter); | ||
| 189 | |||
| 190 | /** | ||
| 191 | * Parse filter options into a dictionary. | ||
| 192 | * | ||
| 193 | * @param logctx context for logging | ||
| 194 | * @param priv_class a filter's private class for shorthand options or NULL | ||
| 195 | * @param options dictionary to store parsed options in | ||
| 196 | * @param args options string to parse | ||
| 197 | * | ||
| 198 | * @return a non-negative number on success, a negative error code on failure | ||
| 199 | */ | ||
| 200 | int ff_filter_opt_parse(void *logctx, const AVClass *priv_class, | ||
| 201 | AVDictionary **options, const char *args); | ||
| 202 | |||
| 203 | int ff_graph_thread_init(FFFilterGraph *graph); | ||
| 204 | |||
| 205 | void ff_graph_thread_free(FFFilterGraph *graph); | ||
| 206 | |||
| 207 | /** | ||
| 208 | * Negotiate the media format, dimensions, etc of all inputs to a filter. | ||
| 209 | * | ||
| 210 | * @param filter the filter to negotiate the properties for its inputs | ||
| 211 | * @return zero on successful negotiation | ||
| 212 | */ | ||
| 213 | int ff_filter_config_links(AVFilterContext *filter); | ||
| 214 | |||
| 215 | /* misc trace functions */ | ||
| 216 | |||
| 217 | #define FF_TPRINTF_START(ctx, func) ff_tlog(NULL, "%-16s: ", #func) | ||
| 218 | |||
| 219 | #ifdef TRACE | ||
| 220 | void ff_tlog_link(void *ctx, AVFilterLink *link, int end); | ||
| 221 | #else | ||
| 222 | #define ff_tlog_link(ctx, link, end) do { } while(0) | ||
| 223 | #endif | ||
| 224 | |||
| 225 | /** | ||
| 226 | * Run one round of processing on a filter graph. | ||
| 227 | */ | ||
| 228 | int ff_filter_graph_run_once(AVFilterGraph *graph); | ||
| 229 | |||
| 230 | /** | ||
| 231 | * Process the commands queued in the link up to the time of the frame. | ||
| 232 | * Commands will trigger the process_command() callback. | ||
| 233 | * @return >= 0 or AVERROR code. | ||
| 234 | */ | ||
| 235 | int ff_inlink_process_commands(AVFilterLink *link, const AVFrame *frame); | ||
| 236 | |||
| 237 | #endif /* AVFILTER_AVFILTER_INTERNAL_H */ | ||
| 238 |