51 #define OFFSET(x) offsetof(AudioDelayContext, x) 52 #define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM 92 #define DELAY(name, type, fill) \ 93 static void delay_channel_## name ##p(ChanDelay *d, int nb_samples, \ 94 const uint8_t *ssrc, uint8_t *ddst) \ 96 const type *src = (type *)ssrc; \ 97 type *dst = (type *)ddst; \ 98 type *samples = (type *)d->samples; \ 100 while (nb_samples) { \ 101 if (d->delay_index < d->delay) { \ 102 const int len = FFMIN(nb_samples, d->delay - d->delay_index); \ 104 memcpy(&samples[d->delay_index], src, len * sizeof(type)); \ 105 memset(dst, fill, len * sizeof(type)); \ 106 d->delay_index += len; \ 111 *dst = samples[d->index]; \ 112 samples[d->index] = *src; \ 116 d->index = d->index >= d->delay ? 0 : d->index; \ 122 DELAY(s16, int16_t, 0)
125 DELAY(dbl,
double, 0)
131 char *p, *
arg, *saveptr =
NULL;
147 if (!(arg =
av_strtok(p,
"|", &saveptr)))
152 ret = sscanf(arg,
"%d%c", &d->
delay, &type);
153 if (ret != 2 || type !=
'S') {
154 sscanf(arg,
"%f", &delay);
155 d->
delay = delay * inlink->sample_rate / 1000.0;
192 switch (inlink->format) {
341 .priv_class = &adelay_class,
int ff_inlink_consume_frame(AVFilterLink *link, AVFrame **rframe)
Take a frame from the link's FIFO and update the link's stats.
This structure describes decoded (raw) audio or video data.
static int activate(AVFilterContext *ctx)
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
Main libavfilter public API header.
#define FFERROR_NOT_READY
Filters implementation helper functions.
int is_disabled
the enabled state from the last expression evaluation
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 * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
const char * name
Pad name.
AVFilterLink ** inputs
array of pointers to input links
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
void(* delay_channel)(ChanDelay *d, int nb_samples, const uint8_t *src, uint8_t *dst)
#define AVERROR_EOF
End of file.
#define FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink)
Forward the status on an output link to an input link.
static const AVOption adelay_options[]
A filter pad used for either input or output.
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
A link between two filters.
int ff_inlink_acknowledge_status(AVFilterLink *link, int *rstatus, int64_t *rpts)
Test and acknowledge the change of status on the link.
static av_cold void uninit(AVFilterContext *ctx)
#define i(width, name, range_min, range_max)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
int av_samples_set_silence(uint8_t **audio_data, int offset, int nb_samples, int nb_channels, enum AVSampleFormat sample_fmt)
Fill an audio buffer with silence.
int sample_rate
samples per second
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
void * priv
private data for use by the filter
AVRational time_base
Define the time base used by the PTS of the frames/samples which will pass through this link...
AVFILTER_DEFINE_CLASS(adelay)
#define FF_FILTER_FORWARD_WANTED(outlink, inlink)
Forward the frame_wanted_out flag from an output link to an input link.
static int query_formats(AVFilterContext *ctx)
static const AVFilterPad inputs[]
static const AVFilterPad outputs[]
A list of supported channel layouts.
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
AVSampleFormat
Audio sample formats.
typedef void(RENAME(mix_any_func_type))
Describe the class of an AVClass context structure.
Rational number (pair of numerator and denominator).
const char * name
Filter name.
#define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will have its filter_frame() c...
AVFilterLink ** outputs
array of pointers to output links
enum MovChannelLayoutTag * layouts
#define flags(name, subs,...)
int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt)
Return number of bytes per sample.
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok()...
int channels
Number of channels.
static const AVFilterPad adelay_inputs[]
static int config_input(AVFilterLink *inlink)
AVFilterContext * dst
dest filter
static const AVFilterPad adelay_outputs[]
static enum AVSampleFormat sample_fmts[]
#define DELAY(name, type, fill)
#define av_malloc_array(a, b)
uint8_t ** extended_data
pointers to the data planes/channels.
int nb_samples
number of audio samples (per channel) described by this frame
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
#define AV_NOPTS_VALUE
Undefined timestamp value.