mirror of https://git.ffmpeg.org/ffmpeg.git
409 lines
14 KiB
C
409 lines
14 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVFILTER_INTERNAL_H
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#define AVFILTER_INTERNAL_H
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/**
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* @file
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* internal API functions
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*/
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#include "libavutil/internal.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "framequeue.h"
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#include "video.h"
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typedef struct AVFilterCommand {
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double time; ///< time expressed in seconds
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char *command; ///< command
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char *arg; ///< optional argument for the command
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int flags;
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struct AVFilterCommand *next;
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} AVFilterCommand;
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/**
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* Update the position of a link in the age heap.
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*/
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void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link);
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/**
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* A filter pad used for either input or output.
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*/
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struct AVFilterPad {
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/**
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* Pad name. The name is unique among inputs and among outputs, but an
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* input may have the same name as an output. This may be NULL if this
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* pad has no need to ever be referenced by name.
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*/
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const char *name;
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/**
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* AVFilterPad type.
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*/
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enum AVMediaType type;
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/**
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* The filter expects writable frames from its input link,
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* duplicating data buffers if needed.
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*
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* input pads only.
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*/
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#define AVFILTERPAD_FLAG_NEEDS_WRITABLE (1 << 0)
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/**
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* The pad's name is allocated and should be freed generically.
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*/
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#define AVFILTERPAD_FLAG_FREE_NAME (1 << 1)
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/**
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* A combination of AVFILTERPAD_FLAG_* flags.
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*/
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int flags;
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/**
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* Callback functions to get a video/audio buffers. If NULL,
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* the filter system will use ff_default_get_video_buffer() for video
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* and ff_default_get_audio_buffer() for audio.
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*
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* The state of the union is determined by type.
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*
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* Input pads only.
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*/
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union {
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AVFrame *(*video)(AVFilterLink *link, int w, int h);
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AVFrame *(*audio)(AVFilterLink *link, int nb_samples);
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} get_buffer;
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/**
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* Filtering callback. This is where a filter receives a frame with
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* audio/video data and should do its processing.
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*
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* Input pads only.
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*
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* @return >= 0 on success, a negative AVERROR on error. This function
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* must ensure that frame is properly unreferenced on error if it
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* hasn't been passed on to another filter.
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*/
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int (*filter_frame)(AVFilterLink *link, AVFrame *frame);
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/**
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* Frame request callback. A call to this should result in some progress
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* towards producing output over the given link. This should return zero
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* on success, and another value on error.
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*
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* Output pads only.
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*/
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int (*request_frame)(AVFilterLink *link);
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/**
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* Link configuration callback.
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*
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* For output pads, this should set the link properties such as
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* width/height. This should NOT set the format property - that is
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* negotiated between filters by the filter system using the
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* query_formats() callback before this function is called.
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*
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* For input pads, this should check the properties of the link, and update
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* the filter's internal state as necessary.
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*
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* For both input and output filters, this should return zero on success,
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* and another value on error.
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*/
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int (*config_props)(AVFilterLink *link);
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};
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struct AVFilterGraphInternal {
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void *thread;
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avfilter_execute_func *thread_execute;
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FFFrameQueueGlobal frame_queues;
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};
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struct AVFilterInternal {
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avfilter_execute_func *execute;
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};
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static av_always_inline int ff_filter_execute(AVFilterContext *ctx, avfilter_action_func *func,
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void *arg, int *ret, int nb_jobs)
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{
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return ctx->internal->execute(ctx, func, arg, ret, nb_jobs);
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}
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enum FilterFormatsState {
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/**
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* The default value meaning that this filter supports all formats
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* and (for audio) sample rates and channel layouts/counts as long
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* as these properties agree for all inputs and outputs.
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* This state is only allowed in case all inputs and outputs actually
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* have the same type.
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* The union is unused in this state.
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*
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* This value must always be zero (for default static initialization).
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*/
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FF_FILTER_FORMATS_PASSTHROUGH = 0,
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FF_FILTER_FORMATS_QUERY_FUNC, ///< formats.query active.
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FF_FILTER_FORMATS_PIXFMT_LIST, ///< formats.pixels_list active.
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FF_FILTER_FORMATS_SAMPLEFMTS_LIST, ///< formats.samples_list active.
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FF_FILTER_FORMATS_SINGLE_PIXFMT, ///< formats.pix_fmt active
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FF_FILTER_FORMATS_SINGLE_SAMPLEFMT, ///< formats.sample_fmt active.
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};
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#define FILTER_QUERY_FUNC(func) \
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.formats.query_func = func, \
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.formats_state = FF_FILTER_FORMATS_QUERY_FUNC
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#define FILTER_PIXFMTS_ARRAY(array) \
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.formats.pixels_list = array, \
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.formats_state = FF_FILTER_FORMATS_PIXFMT_LIST
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#define FILTER_SAMPLEFMTS_ARRAY(array) \
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.formats.samples_list = array, \
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.formats_state = FF_FILTER_FORMATS_SAMPLEFMTS_LIST
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#define FILTER_PIXFMTS(...) \
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FILTER_PIXFMTS_ARRAY(((const enum AVPixelFormat []) { __VA_ARGS__, AV_PIX_FMT_NONE }))
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#define FILTER_SAMPLEFMTS(...) \
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FILTER_SAMPLEFMTS_ARRAY(((const enum AVSampleFormat[]) { __VA_ARGS__, AV_SAMPLE_FMT_NONE }))
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#define FILTER_SINGLE_PIXFMT(pix_fmt_) \
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.formats.pix_fmt = pix_fmt_, \
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.formats_state = FF_FILTER_FORMATS_SINGLE_PIXFMT
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#define FILTER_SINGLE_SAMPLEFMT(sample_fmt_) \
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.formats.sample_fmt = sample_fmt_, \
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.formats_state = FF_FILTER_FORMATS_SINGLE_SAMPLEFMT
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#define FILTER_INOUTPADS(inout, array) \
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.inout = array, \
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.nb_ ## inout = FF_ARRAY_ELEMS(array)
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#define FILTER_INPUTS(array) FILTER_INOUTPADS(inputs, (array))
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#define FILTER_OUTPUTS(array) FILTER_INOUTPADS(outputs, (array))
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/**
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* Tell if an integer is contained in the provided -1-terminated list of integers.
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* This is useful for determining (for instance) if an AVPixelFormat is in an
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* array of supported formats.
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*
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* @param fmt provided format
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* @param fmts -1-terminated list of formats
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* @return 1 if present, 0 if absent
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*/
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int ff_fmt_is_in(int fmt, const int *fmts);
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/* Functions to parse audio format arguments */
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/**
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* Parse a pixel format.
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*
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* @param ret pixel format pointer to where the value should be written
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* @param arg string to parse
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* @param log_ctx log context
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* @return >= 0 in case of success, a negative AVERROR code on error
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*/
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av_warn_unused_result
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int ff_parse_pixel_format(enum AVPixelFormat *ret, const char *arg, void *log_ctx);
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/**
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* Parse a sample rate.
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*
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* @param ret unsigned integer pointer to where the value should be written
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* @param arg string to parse
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* @param log_ctx log context
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* @return >= 0 in case of success, a negative AVERROR code on error
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*/
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av_warn_unused_result
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int ff_parse_sample_rate(int *ret, const char *arg, void *log_ctx);
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/**
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* Parse a channel layout or a corresponding integer representation.
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*
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* @param ret 64bit integer pointer to where the value should be written.
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* @param nret integer pointer to the number of channels;
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* if not NULL, then unknown channel layouts are accepted
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* @param arg string to parse
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* @param log_ctx log context
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* @return >= 0 in case of success, a negative AVERROR code on error
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*/
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av_warn_unused_result
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int ff_parse_channel_layout(AVChannelLayout *ret, int *nret, const char *arg,
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void *log_ctx);
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void ff_update_link_current_pts(AVFilterLink *link, int64_t pts);
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/**
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* Set the status field of a link from the source filter.
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* The pts should reflect the timestamp of the status change,
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* in link time base and relative to the frames timeline.
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* In particular, for AVERROR_EOF, it should reflect the
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* end time of the last frame.
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*/
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void ff_avfilter_link_set_in_status(AVFilterLink *link, int status, int64_t pts);
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/**
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* Set the status field of a link from the destination filter.
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* The pts should probably be left unset (AV_NOPTS_VALUE).
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*/
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void ff_avfilter_link_set_out_status(AVFilterLink *link, int status, int64_t pts);
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void ff_command_queue_pop(AVFilterContext *filter);
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#define D2TS(d) (isnan(d) ? AV_NOPTS_VALUE : (int64_t)(d))
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#define TS2D(ts) ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts))
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#define TS2T(ts, tb) ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts) * av_q2d(tb))
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/* misc trace functions */
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#define FF_TPRINTF_START(ctx, func) ff_tlog(NULL, "%-16s: ", #func)
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char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms);
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void ff_tlog_link(void *ctx, AVFilterLink *link, int end);
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/**
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* Append a new input/output pad to the filter's list of such pads.
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*
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* The *_free_name versions will set the AVFILTERPAD_FLAG_FREE_NAME flag
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* ensuring that the name will be freed generically (even on insertion error).
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*/
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int ff_append_inpad (AVFilterContext *f, AVFilterPad *p);
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int ff_append_outpad(AVFilterContext *f, AVFilterPad *p);
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int ff_append_inpad_free_name (AVFilterContext *f, AVFilterPad *p);
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int ff_append_outpad_free_name(AVFilterContext *f, AVFilterPad *p);
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/**
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* Request an input frame from the filter at the other end of the link.
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*
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* This function must not be used by filters using the activate callback,
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* use ff_link_set_frame_wanted() instead.
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*
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* The input filter may pass the request on to its inputs, fulfill the
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* request from an internal buffer or any other means specific to its function.
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*
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* When the end of a stream is reached AVERROR_EOF is returned and no further
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* frames are returned after that.
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*
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* When a filter is unable to output a frame for example due to its sources
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* being unable to do so or because it depends on external means pushing data
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* into it then AVERROR(EAGAIN) is returned.
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* It is important that a AVERROR(EAGAIN) return is returned all the way to the
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* caller (generally eventually a user application) as this step may (but does
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* not have to be) necessary to provide the input with the next frame.
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*
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* If a request is successful then some progress has been made towards
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* providing a frame on the link (through ff_filter_frame()). A filter that
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* needs several frames to produce one is allowed to return success if one
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* more frame has been processed but no output has been produced yet. A
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* filter is also allowed to simply forward a success return value.
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*
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* @param link the input link
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* @return zero on success
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* AVERROR_EOF on end of file
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* AVERROR(EAGAIN) if the previous filter cannot output a frame
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* currently and can neither guarantee that EOF has been reached.
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*/
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int ff_request_frame(AVFilterLink *link);
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#define AVFILTER_DEFINE_CLASS_EXT(name, desc, options) \
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static const AVClass name##_class = { \
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.class_name = desc, \
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.item_name = av_default_item_name, \
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.option = options, \
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.version = LIBAVUTIL_VERSION_INT, \
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.category = AV_CLASS_CATEGORY_FILTER, \
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}
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#define AVFILTER_DEFINE_CLASS(fname) \
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AVFILTER_DEFINE_CLASS_EXT(fname, #fname, fname##_options)
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/**
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* Find the index of a link.
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*
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* I.e. find i such that link == ctx->(in|out)puts[i]
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*/
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#define FF_INLINK_IDX(link) ((int)((link)->dstpad - (link)->dst->input_pads))
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#define FF_OUTLINK_IDX(link) ((int)((link)->srcpad - (link)->src->output_pads))
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/**
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* Send a frame of data to the next filter.
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*
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* @param link the output link over which the data is being sent
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* @param frame a reference to the buffer of data being sent. The
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* receiving filter will free this reference when it no longer
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* needs it or pass it on to the next filter.
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*
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* @return >= 0 on success, a negative AVERROR on error. The receiving filter
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* is responsible for unreferencing frame in case of error.
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*/
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int ff_filter_frame(AVFilterLink *link, AVFrame *frame);
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/**
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* Allocate a new filter context and return it.
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*
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* @param filter what filter to create an instance of
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* @param inst_name name to give to the new filter context
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*
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* @return newly created filter context or NULL on failure
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*/
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AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name);
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int ff_filter_activate(AVFilterContext *filter);
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/**
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* Remove a filter from a graph;
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*/
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void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter);
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/**
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* The filter is aware of hardware frames, and any hardware frame context
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* should not be automatically propagated through it.
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*/
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#define FF_FILTER_FLAG_HWFRAME_AWARE (1 << 0)
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/**
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* Run one round of processing on a filter graph.
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*/
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int ff_filter_graph_run_once(AVFilterGraph *graph);
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/**
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* Get number of threads for current filter instance.
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* This number is always same or less than graph->nb_threads.
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*/
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int ff_filter_get_nb_threads(AVFilterContext *ctx) av_pure;
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/**
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* Generic processing of user supplied commands that are set
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* in the same way as the filter options.
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* NOTE: 'enable' option is handled separately, and not by
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* this function.
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*/
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int ff_filter_process_command(AVFilterContext *ctx, const char *cmd,
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const char *arg, char *res, int res_len, int flags);
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/**
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* Perform any additional setup required for hardware frames.
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*
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* link->hw_frames_ctx must be set before calling this function.
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* Inside link->hw_frames_ctx, the fields format, sw_format, width and
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* height must be set. If dynamically allocated pools are not supported,
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* then initial_pool_size must also be set, to the minimum hardware frame
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* pool size necessary for the filter to work (taking into account any
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* frames which need to stored for use in operations as appropriate). If
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* default_pool_size is nonzero, then it will be used as the pool size if
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* no other modification takes place (this can be used to preserve
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* compatibility).
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*/
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int ff_filter_init_hw_frames(AVFilterContext *avctx, AVFilterLink *link,
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int default_pool_size);
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#endif /* AVFILTER_INTERNAL_H */
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