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66 #define OFFSET(x) offsetof(AudioNLMSContext, x)
67 #define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
68 #define AT AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
81 {
"precision",
"set processing precision",
OFFSET(precision),
AV_OPT_TYPE_INT, {.i64=0}, 0, 2,
A, .unit =
"precision" },
82 {
"auto",
"set auto processing precision", 0,
AV_OPT_TYPE_CONST, {.i64=0}, 0, 0,
A, .unit =
"precision" },
83 {
"float",
"set single-floating point processing precision", 0,
AV_OPT_TYPE_CONST, {.i64=1}, 0, 0,
A, .unit =
"precision" },
84 {
"double",
"set double-floating point processing precision", 0,
AV_OPT_TYPE_CONST, {.i64=2}, 0, 0,
A, .unit =
"precision" },
120 for (
i = 0;
i <
ctx->nb_inputs && nb_samples > 0;
i++) {
131 if (
s->frame[0] &&
s->frame[1]) {
144 out->pts =
s->frame[0]->pts;
145 out->duration =
s->frame[0]->duration;
156 for (
i = 0;
i < 2;
i++) {
165 for (
i = 0;
i < 2;
i++) {
187 s->anlmf = !strcmp(
ctx->filter->name,
"anlmf");
198 if (!
s->delay || !
s->coeffs || !
s->offset || !
s->tmp)
201 switch (outlink->
format) {
203 s->filter_channels = filter_channels_double;
206 s->filter_channels = filter_channels_float;
256 .description =
NULL_IF_CONFIG_SMALL(
"Apply Normalized Least-Mean-Squares algorithm to first audio stream."),
258 .priv_class = &anlms_class,
272 .description =
NULL_IF_CONFIG_SMALL(
"Apply Normalized Least-Mean-Fourth algorithm to first audio stream."),
274 .priv_class = &anlms_class,
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
@ AV_SAMPLE_FMT_FLTP
float, planar
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
static enum AVSampleFormat sample_fmts[]
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#define FILTER_INPUTS(array)
This structure describes decoded (raw) audio or video data.
static av_cold int init(AVFilterContext *ctx)
const char * name
Filter name.
A link between two filters.
const AVFilter ff_af_anlms
#define FF_FILTER_FORWARD_STATUS_BACK_ALL(outlink, filter)
Forward the status on an output link to all input links.
static const AVOption anlms_options[]
A filter pad used for either input or output.
int ff_inlink_check_available_samples(AVFilterLink *link, unsigned min)
Test if enough samples are available on the link.
static void ff_outlink_set_status(AVFilterLink *link, int status, int64_t pts)
Set the status field of a link from the source filter.
void ff_inlink_request_frame(AVFilterLink *link)
Mark that a frame is wanted on the link.
#define FILTER_OUTPUTS(array)
Describe the class of an AVClass context structure.
int ff_inlink_consume_samples(AVFilterLink *link, unsigned min, unsigned max, AVFrame **rframe)
Take samples from the link's FIFO and update the link's stats.
static av_cold void uninit(AVFilterContext *ctx)
int ff_inlink_acknowledge_status(AVFilterLink *link, int *rstatus, int64_t *rpts)
Test and acknowledge the change of status on the link.
const AVFilter ff_af_anlmf
#define FILTER_SINGLE_SAMPLEFMT(sample_fmt_)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
int format
agreed upon media format
static int query_formats(AVFilterContext *ctx)
AVFilterContext * src
source filter
int ff_filter_process_command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Generic processing of user supplied commands that are set in the same way as the filter options.
@ AV_OPT_TYPE_FLOAT
Underlying C type is float.
#define i(width, name, range_min, range_max)
static int activate(AVFilterContext *ctx)
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
AVSampleFormat
Audio sample formats.
int(* filter_channels)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
const char * name
Pad name.
int ff_inlink_queued_samples(AVFilterLink *link)
int ff_filter_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)
static const AVFilterPad inputs[]
@ AV_OPT_TYPE_INT
Underlying C type is int.
@ AV_SAMPLE_FMT_DBLP
double, planar
AVFILTER_DEFINE_CLASS_EXT(anlms, "anlm(f|s)", anlms_options)
static int config_output(AVFilterLink *outlink)
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
av_cold AVFloatDSPContext * avpriv_float_dsp_alloc(int bit_exact)
Allocate a float DSP context.
#define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will have its filter_frame() c...
static const AVFilterPad outputs[]
the definition of that something depends on the semantic of the filter The callback must examine the status of the filter s links and proceed accordingly The status of output links is stored in the status_in and status_out fields and tested by the ff_outlink_frame_wanted() function. If this function returns true
@ AV_OPT_TYPE_CONST
Special option type for declaring named constants.
#define FILTER_QUERY_FUNC(func)