55 #define OFFSET(x) offsetof(DrawGraphContext, x) 56 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM 100 for (i = 0; i < 4; i++) {
148 for (i = 0; i < out->
height; i++)
149 for (j = 0; j < out->
width; j++)
167 int64_t in_pts, out_pts;
212 for (i = 0; i < 4; i++) {
228 vf = av_clipf(vf, s->
min, s->
max);
242 if (i == 0 && (s->
x >= outlink->
w || s->
slide == 3)) {
247 s->
x = outlink->
w - 1;
248 for (j = 0; j < outlink->
h; j++) {
251 (outlink->
w - 1) * 4);
253 }
else if (s->
slide == 3) {
255 for (j = 0; j < outlink->
h; j++) {
258 (outlink->
w - 1) * 4);
260 }
else if (s->
slide == 0) {
266 y = (outlink->
h - 1) * (1 - ((vf - s->
min) / (s->
max - s->
min)));
270 if (i == 0 && (s->
slide > 0))
271 for (j = 0; j < outlink->
h; j++)
275 for (j = y; j < outlink->
h; j++) {
286 if (i == 0 && (s->
slide > 0))
287 for (j = 0; j < outlink->
h; j++)
297 if (i == 0 && (s->
slide > 0)) {
298 for (j = 0; j < y; j++)
300 for (j = outlink->
h - 1; j > y; j--)
304 for (j = y; j <= s->
prev_y[
i]; j++)
307 for (j = s->
prev_y[i]; j <= y; j++)
352 for (i = 0; i < 4; i++) {
369 y = (outlink->
h - 1) * (1 - ((vf - s->
min) / (s->
max - s->
min)));
374 for (j = y; j < outlink->
h; j++) {
394 for (j = y; j <= s->
prev_y[
i]; j++)
397 for (j = s->
prev_y[i]; j <= y; j++)
439 for (i = 0; i < 4; i++)
451 #if CONFIG_DRAWGRAPH_FILTER 478 .priv_class = &drawgraph_class,
482 .
inputs = drawgraph_inputs,
486 #endif // CONFIG_DRAWGRAPH_FILTER 488 #if CONFIG_ADRAWGRAPH_FILTER 490 #define adrawgraph_options drawgraph_options 513 .
name =
"adrawgraph",
516 .priv_class = &adrawgraph_class,
520 .
inputs = adrawgraph_inputs,
523 #endif // CONFIG_ADRAWGRAPH_FILTER
static av_cold int init(AVFilterContext *ctx)
This structure describes decoded (raw) audio or video data.
static void draw_dot(int fg, int x, int y, AVFrame *out)
Main libavfilter public API header.
int h
agreed upon image height
static const char *const var_names[]
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.
static __device__ float ceil(float a)
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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 AVOption drawgraph_options[]
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
static void clear_image(DrawGraphContext *s, AVFrame *out, AVFilterLink *outlink)
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
#define AVERROR_EOF
End of file.
AVDictionary * metadata
metadata.
static av_cold void uninit(AVFilterContext *ctx)
A filter pad used for either input or output.
static int request_frame(AVFilterLink *outlink)
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.
static int config_output(AVFilterLink *outlink)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
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.
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...
int av_sscanf(const char *string, const char *format,...)
See libc sscanf manual for more information.
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
int w
agreed upon image width
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given buffer if it is not large enough, otherwise do nothing.
AVFilterContext * src
source filter
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
static const AVFilterPad outputs[]
AVFilter ff_avf_adrawgraph
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
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
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).
offset must point to AVRational
const char * name
Filter name.
AVRational sample_aspect_ratio
agreed upon sample aspect ratio
offset must point to two consecutive integers
AVFilterLink ** outputs
array of pointers to output links
static enum AVPixelFormat pix_fmts[]
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
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
static int query_formats(AVFilterContext *ctx)
AVFilterFormatsConfig incfg
Lists of supported formats / etc.
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
AVFilterContext * dst
dest filter
#define AVFILTER_DEFINE_CLASS(fname)
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
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
AVPixelFormat
Pixel format.
mode
Use these values in ebur128_init (or'ed).
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.
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about which is also called distortion Distortion can be quantified by almost any quality measurement one chooses the sum of squared differences is used but more complex methods that consider psychovisual effects can be used as well It makes no difference in this discussion First step
simple arithmetic expression evaluator