libavfilter/internal.h

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/*
 * 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

#include "avfilter.h"
#include "avfiltergraph.h"
#include "formats.h"
#include "video.h"

#define POOL_SIZE 32
typedef struct AVFilterPool {
    AVFilterBufferRef *pic[POOL_SIZE];
    int count;
    int refcount;
    int draining;
} AVFilterPool;

typedef struct AVFilterCommand {
    double time;                
    char *command;              
    char *arg;                  
    int flags;
    struct AVFilterCommand *next;
} AVFilterCommand;

void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link);

#if !FF_API_AVFILTERPAD_PUBLIC

struct AVFilterPad {
    const char *name;

    enum AVMediaType type;

    int min_perms;

    int rej_perms;

    void (*start_frame)(AVFilterLink *link, AVFilterBufferRef *picref);

    AVFilterBufferRef *(*get_video_buffer)(AVFilterLink *link, int perms, int w, int h);

    AVFilterBufferRef *(*get_audio_buffer)(AVFilterLink *link, int perms,
                                           int nb_samples);

    int (*end_frame)(AVFilterLink *link);

    int (*draw_slice)(AVFilterLink *link, int y, int height, int slice_dir);

    int (*filter_samples)(AVFilterLink *link, AVFilterBufferRef *samplesref);

    int (*poll_frame)(AVFilterLink *link);

    int (*request_frame)(AVFilterLink *link);

    int (*config_props)(AVFilterLink *link);

    int needs_fifo;
};
#endif

void ff_avfilter_default_free_buffer(AVFilterBuffer *buf);

int ff_fmt_is_in(int fmt, const int *fmts);

int *ff_copy_int_list(const int * const list);

int64_t *ff_copy_int64_list(const int64_t * const list);

/* Functions to parse audio format arguments */

int ff_parse_pixel_format(enum PixelFormat *ret, const char *arg, void *log_ctx);

int ff_parse_sample_rate(int *ret, const char *arg, void *log_ctx);

int ff_parse_time_base(AVRational *ret, const char *arg, void *log_ctx);

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);

void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
                   AVFilterPad **pads, AVFilterLink ***links,
                   AVFilterPad *newpad);

static inline void ff_insert_inpad(AVFilterContext *f, unsigned index,
                                   AVFilterPad *p)
{
    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
}

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
}

int ff_poll_frame(AVFilterLink *link);

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, \
    }

AVFilterBufferRef *ff_copy_buffer_ref(AVFilterLink *outlink,
                                      AVFilterBufferRef *ref);

#define FF_INLINK_IDX(link)  ((int)((link)->dstpad - (link)->dst->input_pads))
#define FF_OUTLINK_IDX(link) ((int)((link)->srcpad - (link)->src->output_pads))

int ff_buffersink_read_compat(AVFilterContext *ctx, AVFilterBufferRef **buf);
int ff_buffersink_read_samples_compat(AVFilterContext *ctx, AVFilterBufferRef **pbuf,
                                      int nb_samples);

#endif /* AVFILTER_INTERNAL_H */

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