/*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#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.
/**
* Callback function to get a video buffer. If NULL, the filter system will
- * use avfilter_default_get_video_buffer().
+ * use ff_default_get_video_buffer().
*
* Input video pads only.
*/
/**
* Callback function to get an audio buffer. If NULL, the filter system will
- * use avfilter_default_get_audio_buffer().
+ * use ff_default_get_audio_buffer().
*
* Input audio pads only.
*/
* Input pads only.
*
* @return >= 0 on success, a negative AVERROR on error. This function
- * must ensure that samplesref is properly unreferenced on error if it
+ * 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);
int (*poll_frame)(AVFilterLink *link);
/**
- * Frame request callback. A call to this should result in at least one
- * frame being output over the given link. This should return zero on
- * success, and another value on error.
+ * 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.
*/
struct AVFilterGraphInternal {
void *thread;
avfilter_execute_func *thread_execute;
+ FFFrameQueueGlobal frame_queues;
};
struct AVFilterInternal {
avfilter_execute_func *execute;
};
-/** Tell is a format is contained in the provided list terminated by -1. */
+/**
+ * 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);
-#define FF_DPRINTF_START(ctx, func) av_log(NULL, AV_LOG_TRACE, "%-16s: ", #func)
+/* 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_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_dlog_link(void *ctx, AVFilterLink *link, int end);
+void ff_tlog_link(void *ctx, AVFilterLink *link, int end);
/**
* Insert a new pad.
* @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
*/
-void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
+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 void ff_insert_inpad(AVFilterContext *f, unsigned index,
+static inline int ff_insert_inpad(AVFilterContext *f, unsigned index,
AVFilterPad *p)
{
- ff_insert_pad(index, &f->nb_inputs, offsetof(AVFilterLink, dstpad),
+ 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 void ff_insert_outpad(AVFilterContext *f, unsigned index,
+static inline int ff_insert_outpad(AVFilterContext *f, unsigned index,
AVFilterPad *p)
{
- ff_insert_pad(index, &f->nb_outputs, offsetof(AVFilterLink, srcpad),
+ 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.
*
*/
AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name);
+int ff_filter_activate(AVFilterContext *filter);
+
/**
* Remove a filter from a graph;
*/
*/
#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);
+
/**
* Perform any additional setup required for hardware frames.
*
int ff_filter_init_hw_frames(AVFilterContext *avctx, AVFilterLink *link,
int default_pool_size);
-
#endif /* AVFILTER_INTERNAL_H */
projects / ffmpeg / blobdiff