39 #define MAX_BANDS MAX_SPLITS + 1 69 #define OFFSET(x) offsetof(AudioCrossoverContext, x) 70 #define AF AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM 97 if (!(arg =
av_strtok(p,
" |", &saveptr)))
111 if (i > 0 && freq <= s->splits[i-1]) {
142 double omega = 2.0 *
M_PI * fc / sr;
143 double sn = sin(omega);
144 double cs = cos(omega);
145 double alpha = sn / (2. * q);
146 double inv = 1.0 / (1.0 +
alpha);
148 b->
a0 = (1. - cs) * 0.5 * inv;
149 b->
a1 = (1. - cs) * inv;
151 b->
b1 = -2. * cs * inv;
157 double omega = 2 *
M_PI * fc / sr;
158 double sn = sin(omega);
159 double cs = cos(omega);
160 double alpha = sn / (2 * q);
161 double inv = 1.0 / (1.0 +
alpha);
163 b->
a0 = inv * (1. + cs) / 2.;
166 b->
b1 = -2. * cs * inv;
196 for (ch = 0; ch < inlink->
channels; ch++) {
197 for (band = 0; band <= s->
nb_splits; band++) {
265 const int start = (in->
channels * jobnr) / nb_jobs;
266 const int end = (in->
channels * (jobnr+1)) / nb_jobs;
269 for (
int ch = start; ch <
end; ch++) {
274 double sample = src[
i], lo, hi;
276 for (band = 0; band < ctx->
nb_outputs; band++) {
277 double *dst = (
double *)frames[band]->extended_data[ch];
365 .
name =
"acrossover",
368 .priv_class = &acrossover_class,
This structure describes decoded (raw) audio or video data.
static av_cold int init(AVFilterContext *ctx)
AVFrame * frames[MAX_BANDS]
static int config_input(AVFilterLink *inlink)
static const AVFilterPad inputs[]
Main libavfilter public API header.
enum AVMediaType type
AVFilterPad type.
Macro definitions for various function/variable attributes.
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
const char * name
Pad name.
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
AVFilterPad * output_pads
array of output pads
static av_cold int end(AVCodecContext *avctx)
BiquadContext lp[MAX_BANDS][4]
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
static int filter_channels(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
#define AVFILTER_FLAG_DYNAMIC_OUTPUTS
The number of the filter outputs is not determined just by AVFilter.outputs.
A filter pad used for either input or output.
A link between two filters.
#define fc(width, name, range_min, range_max)
#define i(width, name, range_min, range_max)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
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.
unsigned nb_outputs
number of output pads
#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
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
int av_sscanf(const char *string, const char *format,...)
See libc sscanf manual for more information.
BiquadContext hp[MAX_BANDS][4]
char * av_asprintf(const char *fmt,...)
common internal API header
static double biquad_process(BiquadContext *b, double in)
int channels
number of audio channels, only used for audio.
audio channel layout utility functions
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
static void set_hp(BiquadContext *b, double fc, double q, double sr)
static int query_formats(AVFilterContext *ctx)
static void set_lp(BiquadContext *b, double fc, double q, double sr)
static const AVFilterPad outputs[]
A list of supported channel layouts.
AVSampleFormat
Audio sample formats.
static const int16_t alpha[]
AVFILTER_DEFINE_CLASS(acrossover)
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Describe the class of an AVClass context structure.
const char * name
Filter name.
AVFilterLink ** outputs
array of pointers to output links
enum MovChannelLayoutTag * layouts
#define flags(name, subs,...)
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
AVFilter ff_af_acrossover
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()...
static av_cold void uninit(AVFilterContext *ctx)
int channels
Number of channels.
avfilter_execute_func * execute
AVFilterContext * dst
dest filter
static enum AVSampleFormat sample_fmts[]
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
static const AVOption acrossover_options[]
uint8_t ** extended_data
pointers to the data planes/channels.
static int ff_insert_outpad(AVFilterContext *f, unsigned index, AVFilterPad *p)
Insert a new output pad for the filter.
int nb_samples
number of audio samples (per channel) described by this frame
simple arithmetic expression evaluator