Go to the documentation of this file.
68 #define OFFSET(x) offsetof(EdgeDetectContext, x)
69 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
132 int vsub = p ?
desc->log2_chroma_h : 0;
133 int hsub = p ?
desc->log2_chroma_w : 0;
147 uint8_t *dst,
int dst_linesize,
152 memcpy(dst,
src,
w); dst += dst_linesize;
src += src_linesize;
154 memcpy(dst,
src,
w); dst += dst_linesize;
src += src_linesize;
156 for (j = 2; j <
h - 2; j++) {
160 for (
i = 2;
i <
w - 2;
i++) {
162 dst[
i] = ((
src[-2*src_linesize +
i-2] +
src[2*src_linesize +
i-2]) * 2
163 + (
src[-2*src_linesize +
i-1] +
src[2*src_linesize +
i-1]) * 4
164 + (
src[-2*src_linesize +
i ] +
src[2*src_linesize +
i ]) * 5
165 + (
src[-2*src_linesize +
i+1] +
src[2*src_linesize +
i+1]) * 4
166 + (
src[-2*src_linesize +
i+2] +
src[2*src_linesize +
i+2]) * 2
168 + (
src[ -src_linesize +
i-2] +
src[ src_linesize +
i-2]) * 4
169 + (
src[ -src_linesize +
i-1] +
src[ src_linesize +
i-1]) * 9
170 + (
src[ -src_linesize +
i ] +
src[ src_linesize +
i ]) * 12
171 + (
src[ -src_linesize +
i+1] +
src[ src_linesize +
i+1]) * 9
172 + (
src[ -src_linesize +
i+2] +
src[ src_linesize +
i+2]) * 4
178 +
src[
i+2] * 5) / 159;
183 dst[
i + 1] =
src[
i + 1];
189 memcpy(dst,
src,
w); dst += dst_linesize;
src += src_linesize;
215 int tanpi8gx, tan3pi8gx;
220 tanpi8gx = 27146 * gx;
221 tan3pi8gx = 158218 * gx;
230 uint16_t *dst,
int dst_linesize,
231 int8_t *dir,
int dir_linesize,
236 for (j = 1; j <
h - 1; j++) {
240 for (
i = 1;
i <
w - 1;
i++) {
242 -1*
src[-src_linesize +
i-1] + 1*
src[-src_linesize +
i+1]
244 -1*
src[ src_linesize +
i-1] + 1*
src[ src_linesize +
i+1];
246 -1*
src[-src_linesize +
i-1] + 1*
src[ src_linesize +
i-1]
247 -2*
src[-src_linesize +
i ] + 2*
src[ src_linesize +
i ]
248 -1*
src[-src_linesize +
i+1] + 1*
src[ src_linesize +
i+1];
257 uint8_t *dst,
int dst_linesize,
258 const int8_t *dir,
int dir_linesize,
259 const uint16_t *
src,
int src_linesize)
263 #define COPY_MAXIMA(ay, ax, by, bx) do { \
264 if (src[i] > src[(ay)*src_linesize + i+(ax)] && \
265 src[i] > src[(by)*src_linesize + i+(bx)]) \
266 dst[i] = av_clip_uint8(src[i]); \
269 for (j = 1; j <
h - 1; j++) {
273 for (
i = 1;
i <
w - 1;
i++) {
285 uint8_t *dst,
int dst_linesize,
290 for (j = 0; j <
h; j++) {
291 for (
i = 0;
i <
w;
i++) {
297 if ((!
i ||
i ==
w - 1 || !j || j ==
h - 1) &&
299 (
src[-src_linesize +
i-1] > high ||
300 src[-src_linesize +
i ] > high ||
301 src[-src_linesize +
i+1] > high ||
304 src[ src_linesize +
i-1] > high ||
305 src[ src_linesize +
i ] > high ||
306 src[ src_linesize +
i+1] > high))
317 uint8_t *dst,
int dst_linesize,
322 for (j = 0; j <
h; j++) {
323 for (
i = 0;
i <
w;
i++)
324 dst[
i] = (dst[
i] +
src[
i]) >> 1;
358 if (!((1 << p) &
edgedetect->filter_planes)) {
361 in->data[p],
in->linesize[p],
369 in->data[p],
in->linesize[p]);
388 out->data[p],
out->linesize[p],
393 out->data[p],
out->linesize[p],
394 in->data[p],
in->linesize[p]);
435 .
name =
"edgedetect",
443 .priv_class = &edgedetect_class,
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
static void direct(const float *in, const FFTComplex *ir, int len, float *out)
AVPixelFormat
Pixel format.
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
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
This document is a tutorial initiation for writing simple filters in libavfilter libavfilter is which means that it is highly recommended that you submit your filters to the FFmpeg development mailing list and make sure that they are applied your filters are likely to have a very short lifetime due to more or less regular internal API and a limited and testing changes the pixels in whatever fashion you and outputs the modified frame The most simple way of doing this is to take a similar filter We ll pick edgedetect
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 void gaussian_blur(AVFilterContext *ctx, int w, int h, uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize)
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
This structure describes decoded (raw) audio or video data.
static int get_rounded_direction(int gx, int gy)
const char * name
Filter name.
A link between two filters.
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)
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)
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
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)
A filter pad used for either input or output.
#define COPY_MAXIMA(ay, ax, by, bx)
#define AV_CEIL_RSHIFT(a, b)
#define av_assert0(cond)
assert() equivalent, that is always enabled.
static const AVFilterPad outputs[]
static enum AVPixelFormat pix_fmts[]
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
static const AVFilterPad edgedetect_inputs[]
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
static av_cold int init(AVFilterContext *ctx)
Describe the class of an AVClass context structure.
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
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
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
static av_cold void uninit(AVFilterContext *ctx)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
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
#define i(width, name, range_min, range_max)
struct plane_info planes[3]
int w
agreed upon image width
const char * name
Pad name.
static int config_props(AVFilterLink *inlink)
static const AVOption edgedetect_options[]
FFmpeg Automated Testing Environment ************************************Introduction Using FATE from your FFmpeg source directory Submitting the results to the FFmpeg result aggregation server Uploading new samples to the fate suite FATE makefile targets and variables Makefile targets Makefile variables Examples Introduction **************FATE is an extended regression suite on the client side and a means for results aggregation and presentation on the server side The first part of this document explains how you can use FATE from your FFmpeg source directory to test your ffmpeg binary The second part describes how you can run FATE to submit the results to FFmpeg’s FATE server In any way you can have a look at the publicly viewable FATE results by visiting this as it can be seen if some test on some platform broke with their recent contribution This usually happens on the platforms the developers could not test on The second part of this document describes how you can run FATE to submit your results to FFmpeg’s FATE server If you want to submit your results be sure to check that your combination of OS and compiler is not already listed on the above mentioned website In the third part you can find a comprehensive listing of FATE makefile targets and variables Using FATE from your FFmpeg source directory **********************************************If you want to run FATE on your machine you need to have the samples in place You can get the samples via the build target fate rsync Use this command from the top level source this will cause FATE to fail NOTE To use a custom wrapper to run the pass ‘ target exec’ to ‘configure’ or set the TARGET_EXEC Make variable Submitting the results to the FFmpeg result aggregation server ****************************************************************To submit your results to the server you should run fate through the shell script ‘tests fate sh’ from the FFmpeg sources This script needs to be invoked with a configuration file as its first argument tests fate sh path to fate_config A configuration file template with comments describing the individual configuration variables can be found at ‘doc fate_config sh template’ Create a configuration that suits your based on the configuration template The ‘slot’ configuration variable can be any string that is not yet but it is suggested that you name it adhering to the following pattern ‘ARCH OS COMPILER COMPILER VERSION’ The configuration file itself will be sourced in a shell therefore all shell features may be used This enables you to setup the environment as you need it for your build For your first test runs the ‘fate_recv’ variable should be empty or commented out This will run everything as normal except that it will omit the submission of the results to the server The following files should be present in $workdir as specified in the configuration it may help to try out the ‘ssh’ command with one or more ‘ v’ options You should get detailed output concerning your SSH configuration and the authentication process The only thing left is to automate the execution of the fate sh script and the synchronisation of the samples directory Uploading new samples to the fate suite *****************************************If you need a sample uploaded send a mail to samples request This is for developers who have an account on the fate suite server If you upload new please make sure they are as small as space on each network bandwidth and so on benefit from smaller test cases Also keep in mind older checkouts use existing sample that means in practice generally do not remove or overwrite files as it likely would break older checkouts or releases Also all needed samples for a commit should be ideally before the push If you need an account for frequently uploading samples or you wish to help others by doing that send a mail to ffmpeg devel rsync vauL Duo ug o o w
static int query_formats(AVFilterContext *ctx)
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
int h
agreed upon image height
AVFILTER_DEFINE_CLASS(edgedetect)
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
@ AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
AVFilter ff_vf_edgedetect
#define flags(name, subs,...)
static const AVFilterPad edgedetect_outputs[]
static void color_mix(int w, int h, uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize)