mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-15 11:44:49 +00:00
547d412078
start_frame is no more, samplesref argument is now frame argument. Signed-off-by: Paul B Mahol <onemda@gmail.com>
406 lines
13 KiB
C
406 lines
13 KiB
C
/*
|
|
* 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 "avfiltergraph.h"
|
|
#include "formats.h"
|
|
#include "framepool.h"
|
|
#include "thread.h"
|
|
#include "version.h"
|
|
#include "video.h"
|
|
#include "libavcodec/avcodec.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 poll callback. This returns the number of immediately available
|
|
* samples. It should return a positive value if the next request_frame()
|
|
* is guaranteed to return one frame (with no delay).
|
|
*
|
|
* Defaults to just calling the source poll_frame() method.
|
|
*
|
|
* Output pads only.
|
|
*/
|
|
int (*poll_frame)(AVFilterLink *link);
|
|
|
|
/**
|
|
* 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 a fifo to be inserted on its input link,
|
|
* typically because it has a delay.
|
|
*
|
|
* input pads only.
|
|
*/
|
|
int needs_fifo;
|
|
|
|
/**
|
|
* 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;
|
|
};
|
|
|
|
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 time base.
|
|
*
|
|
* @param ret unsigned AVRational 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_time_base(AVRational *ret, const char *arg, void *log_ctx);
|
|
|
|
/**
|
|
* Parse a sample format name or a corresponding integer representation.
|
|
*
|
|
* @param ret 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_format(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);
|
|
|
|
/* 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, 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);
|
|
}
|
|
|
|
/**
|
|
* Poll a frame from the filter chain.
|
|
*
|
|
* @param link the input link
|
|
* @return the number of immediately available frames, a negative
|
|
* number in case of error
|
|
*/
|
|
int ff_poll_frame(AVFilterLink *link);
|
|
|
|
/**
|
|
* Request an input frame from the filter at the other end of the link.
|
|
*
|
|
* 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);
|
|
|
|
int ff_request_frame_to_filter(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);
|
|
|
|
/**
|
|
* Remove a filter from a graph;
|
|
*/
|
|
void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter);
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
#endif /* AVFILTER_INTERNAL_H */
|