35 static const char *
const var_names[] = {
"VOLUME",
"CHANNEL",
"PEAK",
NULL };
71 #define OFFSET(x) offsetof(ShowVolumeContext, x) 72 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM 160 *rms += factor * (src[i] * src[i] - *rms);
214 for (ch = 0; ch < inlink->
channels; ch++) {
217 for (i = 0; i < s->
w; i++) {
218 float max = i / (float)(s->
w - 1);
238 for (i = 0; txt[
i]; i++) {
242 for (char_y = font_height - 1; char_y >= 0; char_y--) {
244 for (mask = 0x80;
mask; mask >>= 1) {
245 if (font[txt[i] * font_height + font_height - 1 - char_y] & mask)
252 for (char_y = 0; char_y < font_height; char_y++) {
253 for (mask = 0x80;
mask; mask >>= 1) {
254 if (font[txt[i] * font_height + char_y] & mask)
267 const uint32_t bg = (uint32_t)(s->
bgopacity * 255) << 24;
269 for (i = 0; i < outlink->
h; i++) {
271 for (j = 0; j < outlink->
w; j++)
282 max_val = av_clipf(0.21 * log10(max) + 1, 0, 1);
285 return outlink->
h - outlink->
h * max_val;
287 return s->
w * max_val;
307 for (k = 0; k < s->
h; k++) {
311 for (k = 0; k < s->
h; k++) {
324 int c, j, k, max_draw;
339 if ((s->
f < 1.) && (s->
f > 0.)) {
340 for (j = 0; j < outlink->
h; j++) {
344 for (k = 0; k < outlink->
w; k++) {
345 dst[k * 4 + 0] =
FFMAX(dst[k * 4 + 0] * s->
f, 0);
346 dst[k * 4 + 1] =
FFMAX(dst[k * 4 + 1] * s->
f, 0);
347 dst[k * 4 + 2] =
FFMAX(dst[k * 4 + 2] * s->
f, 0);
348 dst[k * 4 + 3] =
FFMAX(dst[k * 4 + 3] * s->
f, alpha);
351 }
else if (s->
f == 0.) {
356 for (c = 0; c < inlink->
channels; c++) {
365 max = av_clipf(
max, 0, 1);
368 for (j = max_draw; j < s->
w; j++) {
370 for (k = 0; k < s->
h; k++) {
371 AV_WN32A(&dst[k * 4], lut[s->
w - j - 1]);
381 drawtext(s->
out, c * (s->
h + s->
b) + (s->
h - 10) / 2, outlink->
h - 35, channel_name, 1);
391 for (c = 0; c < inlink->
channels; c++) {
400 max = av_clipf(
max, 0, 1);
403 for (j = 0; j < s->
h; j++) {
406 for (k = 0; k < max_draw; k++) {
417 drawtext(s->
out, 2, c * (s->
h + s->
b) + (s->
h - 8) / 2, channel_name, 0);
440 drawtext(out, c * (s->
h + s->
b) + (s->
h - 8) / 2, 2, buf, 1);
443 drawtext(out,
FFMAX(0, s->
w - 8 * (
int)strlen(buf)), c * (s->
h + s->
b) + (s->
h - 8) / 2, buf, 0);
502 .
name =
"showvolume",
509 .
inputs = showvolume_inputs,
511 .priv_class = &showvolume_class,
uint8_t persistant_max_rgba[4]
This structure describes decoded (raw) audio or video data.
AVFilter ff_avf_showvolume
Main libavfilter public API header.
int h
agreed upon image height
FF_FILTER_FORWARD_STATUS(inlink, outlink)
void(* meter)(float *src, int nb_samples, float *max, float factor)
int av_expr_parse(AVExpr **expr, const char *s, const char *const *const_names, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), int log_offset, void *log_ctx)
Parse an expression.
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
AVFilterFormatsConfig outcfg
Lists of supported formats / etc.
static void drawtext(AVFrame *pic, int x, int y, const char *txt, int o)
static void calc_persistent_max(ShowVolumeContext *s, float max, int channel)
static const AVOption showvolume_options[]
static void find_rms(float *src, int nb_samples, float *rms, float factor)
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.
static const AVFilterPad showvolume_outputs[]
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
static double av_q2d(AVRational a)
Convert an AVRational to a double.
#define FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink)
Forward the status on an output link to an input link.
A filter pad used for either input or output.
A link between two filters.
const uint8_t avpriv_cga_font[2048]
AVRational frame_rate
Frame rate of the stream on the link, or 1/0 if unknown or variable; if left to 0/0, will be automatically copied from the first input of the source filter if it exists.
int sample_rate
samples per second
static const uint16_t mask[17]
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
static void draw_max_line(ShowVolumeContext *s, int max_draw, int channel)
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
uint64_t channel_layout
Channel layout of the audio data.
int w
agreed upon image width
audio channel layout utility functions
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
static void find_peak(float *src, int nb_samples, float *peak, float factor)
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
AVFilterContext * src
source filter
static const AVFilterPad showvolume_inputs[]
static int config_output(AVFilterLink *outlink)
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
static const AVFilterPad outputs[]
A list of supported channel layouts.
static void clear_picture(ShowVolumeContext *s, AVFilterLink *outlink)
int persistent_max_frames
AVSampleFormat
Audio sample formats.
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
static int query_formats(AVFilterContext *ctx)
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
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 const int16_t alpha[]
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
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)\n", 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.
Rational number (pair of numerator and denominator).
static int activate(AVFilterContext *ctx)
static int calc_max_draw(ShowVolumeContext *s, AVFilterLink *outlink, float max)
offset must point to AVRational
static av_cold int init(AVFilterContext *ctx)
static const int factor[16]
const char * name
Filter name.
AVRational sample_aspect_ratio
agreed upon sample aspect ratio
AVFilterLink ** outputs
array of pointers to output links
enum MovChannelLayoutTag * layouts
static enum AVPixelFormat pix_fmts[]
int * nb_frames_max_display
int av_frame_make_writable(AVFrame *frame)
Ensure that the frame data is writable, avoiding data copy if possible.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
double draw_persistent_duration
uint64_t av_channel_layout_extract_channel(uint64_t channel_layout, int index)
Get the channel with the given index in channel_layout.
channel
Use these values when setting the channel map with ebur128_set_channel().
static int config_input(AVFilterLink *inlink)
int channels
Number of channels.
AVFilterFormatsConfig incfg
Lists of supported formats / etc.
FF_FILTER_FORWARD_WANTED(outlink, inlink)
static av_cold void uninit(AVFilterContext *ctx)
static const char *const var_names[]
const char * av_get_channel_name(uint64_t channel)
Get the name of a given channel.
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
AVFilterContext * dst
dest filter
static enum AVSampleFormat sample_fmts[]
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
uint8_t ** extended_data
pointers to the data planes/channels.
AVPixelFormat
Pixel format.
mode
Use these values in ebur128_init (or'ed).
int nb_samples
number of audio samples (per channel) described by this frame
AVFILTER_DEFINE_CLASS(showvolume)
CGA/EGA/VGA ROM font data.
simple arithmetic expression evaluator