56 #define OFFSET(x) offsetof(EdgeDetectContext, x)
57 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
73 edgedetect->
low_u8 = edgedetect->
low * 255. + .5;
101 for (p = 0; p < edgedetect->
nb_planes; p++) {
114 uint8_t *dst,
int dst_linesize,
119 memcpy(dst, src, w); dst += dst_linesize; src += src_linesize;
120 memcpy(dst, src, w); dst += dst_linesize; src += src_linesize;
121 for (j = 2; j < h - 2; j++) {
124 for (i = 2; i < w - 2; i++) {
126 dst[i] = ((src[-2*src_linesize + i-2] + src[2*src_linesize + i-2]) * 2
127 + (src[-2*src_linesize + i-1] + src[2*src_linesize + i-1]) * 4
128 + (src[-2*src_linesize + i ] + src[2*src_linesize + i ]) * 5
129 + (src[-2*src_linesize + i+1] + src[2*src_linesize + i+1]) * 4
130 + (src[-2*src_linesize + i+2] + src[2*src_linesize + i+2]) * 2
132 + (src[ -src_linesize + i-2] + src[ src_linesize + i-2]) * 4
133 + (src[ -src_linesize + i-1] + src[ src_linesize + i-1]) * 9
134 + (src[ -src_linesize + i ] + src[ src_linesize + i ]) * 12
135 + (src[ -src_linesize + i+1] + src[ src_linesize + i+1]) * 9
136 + (src[ -src_linesize + i+2] + src[ src_linesize + i+2]) * 4
142 + src[i+2] * 5) / 159;
145 dst[i + 1] = src[i + 1];
150 memcpy(dst, src, w); dst += dst_linesize; src += src_linesize;
174 int tanpi8gx, tan3pi8gx;
179 tanpi8gx = 27146 * gx;
180 tan3pi8gx = 158218 * gx;
189 uint16_t *dst,
int dst_linesize,
190 int8_t *dir,
int dir_linesize,
195 for (j = 1; j < h - 1; j++) {
199 for (i = 1; i < w - 1; i++) {
201 -1*src[-src_linesize + i-1] + 1*src[-src_linesize + i+1]
202 -2*src[ i-1] + 2*src[ i+1]
203 -1*src[ src_linesize + i-1] + 1*src[ src_linesize + i+1];
205 -1*src[-src_linesize + i-1] + 1*src[ src_linesize + i-1]
206 -2*src[-src_linesize + i ] + 2*src[ src_linesize + i ]
207 -1*src[-src_linesize + i+1] + 1*src[ src_linesize + i+1];
216 uint8_t *dst,
int dst_linesize,
217 const int8_t *dir,
int dir_linesize,
218 const uint16_t *
src,
int src_linesize)
222 #define COPY_MAXIMA(ay, ax, by, bx) do { \
223 if (src[i] > src[(ay)*src_linesize + i+(ax)] && \
224 src[i] > src[(by)*src_linesize + i+(bx)]) \
225 dst[i] = av_clip_uint8(src[i]); \
228 for (j = 1; j < h - 1; j++) {
232 for (i = 1; i < w - 1; i++) {
244 uint8_t *dst,
int dst_linesize,
249 for (j = 0; j < h; j++) {
250 for (i = 0; i < w; i++) {
256 if ((!i || i == w - 1 || !j || j == h - 1) &&
258 (src[-src_linesize + i-1] > high ||
259 src[-src_linesize + i ] > high ||
260 src[-src_linesize + i+1] > high ||
263 src[ src_linesize + i-1] > high ||
264 src[ src_linesize + i ] > high ||
265 src[ src_linesize + i+1] > high))
276 uint8_t *dst,
int dst_linesize,
281 for (j = 0; j < h; j++) {
282 for (i = 0; i < w; i++)
283 dst[i] = (dst[i] + src[i]) >> 1;
309 for (p = 0; p < edgedetect->
nb_planes; p++) {
322 gradients, inlink->
w,
323 directions,inlink->
w,
328 memset(tmpbuf, 0, inlink->
w * inlink->
h);
331 directions,inlink->
w,
332 gradients, inlink->
w);
336 inlink->
w, inlink->
h,
357 for (p = 0; p < edgedetect->
nb_planes; p++) {
384 .
name =
"edgedetect",
390 .
inputs = edgedetect_inputs,
392 .priv_class = &edgedetect_class,
static const AVFilterPad edgedetect_outputs[]
static av_cold void uninit(AVFilterContext *ctx)
This structure describes decoded (raw) audio or video data.
static const AVFilterPad outputs[]
Main libavfilter public API header.
static void sobel(int w, int h, uint16_t *dst, int dst_linesize, int8_t *dir, int dir_linesize, const uint8_t *src, int src_linesize)
int h
agreed upon image height
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;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);returnNULL;}returnac;}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;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->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);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
static void double_threshold(int low, int high, int w, int h, uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize)
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
const char * name
Pad name.
#define av_assert0(cond)
assert() equivalent, that is always enabled.
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
static int query_formats(AVFilterContext *ctx)
AVFILTER_DEFINE_CLASS(edgedetect)
A filter pad used for either input or output.
A link between two filters.
static const AVOption edgedetect_options[]
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
simple assert() macros that are a bit more flexible than ISO C assert().
static int config_props(AVFilterLink *inlink)
AVFilter ff_vf_edgedetect
int w
agreed upon image width
static void gaussian_blur(AVFilterContext *ctx, int w, int h, uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize)
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
static int get_rounded_direction(int gx, int gy)
int format
agreed upon media format
static const AVFilterPad edgedetect_inputs[]
static av_cold int init(AVFilterContext *ctx)
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
struct plane_info planes[3]
Describe the class of an AVClass context structure.
static const AVFilterPad inputs[]
const char * name
Filter name.
AVFilterLink ** outputs
array of pointers to output links
#define COPY_MAXIMA(ay, ax, by, bx)
void * av_calloc(size_t nmemb, size_t size)
Allocate a block of nmemb * size bytes with alignment suitable for all memory accesses (including vec...
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
static void non_maximum_suppression(int w, int h, uint8_t *dst, int dst_linesize, const int8_t *dir, int dir_linesize, const uint16_t *src, int src_linesize)
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;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);returnNULL;}returnac;}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;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->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);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
AVFilterContext * dst
dest filter
static void color_mix(int w, int h, uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize)
AVPixelFormat
Pixel format.
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.