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75 if (!strcmp(
ctx->filter->name,
"vstack"))
78 if (!strcmp(
ctx->filter->name,
"hstack"))
85 if (!strcmp(
ctx->filter->name,
"xstack")) {
87 if (
s->nb_inputs == 2) {
102 for (
i = 0;
i <
s->nb_inputs;
i++) {
128 for (
i = 0;
i <
s->nb_inputs;
i++) {
139 for (
i = 0;
i <
s->nb_inputs;
i++) {
144 if (
s->is_horizontal ||
s->is_vertical) {
154 for (p = 0; p <
s->nb_planes; p++) {
155 if (
s->is_vertical) {
162 }
else if (
s->is_horizontal) {
199 if (
s->is_vertical) {
200 for (
i = 1;
i <
s->nb_inputs;
i++) {
207 }
else if (
s->is_horizontal) {
208 for (
i = 1;
i <
s->nb_inputs;
i++) {
216 char *
arg, *p =
s->layout, *saveptr =
NULL;
217 char *arg2, *p2, *saveptr2 =
NULL;
218 char *arg3, *p3, *saveptr3 =
NULL;
221 for (
i = 0;
i <
s->nb_inputs;
i++) {
240 for (
int j = 0; j < 2; j++) {
241 if (!(arg2 =
av_strtok(p2,
"_", &saveptr2)))
246 while ((arg3 =
av_strtok(p3,
"+", &saveptr3))) {
248 if (sscanf(arg3,
"w%d", &
size) == 1) {
249 if (
size ==
i || size < 0 || size >=
s->nb_inputs)
256 }
else if (sscanf(arg3,
"h%d", &
size) == 1) {
257 if (
size ==
i || size < 0 || size >=
s->nb_inputs)
264 }
else if (sscanf(arg3,
"%d", &
size) == 1) {
283 item->
y[0] = item->
y[3] = inh;
304 for (
i = 0;
i <
s->nb_inputs;
i++) {
328 for (
i = 0;
i <
ctx->nb_inputs;
i++)
338 #define OFFSET(x) offsetof(StackContext, x)
339 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
342 {
"shortest",
"force termination when the shortest input terminates",
OFFSET(shortest),
AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags =
FLAGS },
355 #if CONFIG_HSTACK_FILTER
357 #define hstack_options stack_options
364 .priv_class = &hstack_class,
375 #if CONFIG_VSTACK_FILTER
377 #define vstack_options stack_options
384 .priv_class = &vstack_class,
395 #if CONFIG_XSTACK_FILTER
397 static const AVOption xstack_options[] = {
400 {
"shortest",
"force termination when the shortest input terminates",
OFFSET(shortest),
AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags =
FLAGS },
410 .priv_class = &xstack_class,
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
int ff_framesync_configure(FFFrameSync *fs)
Configure a frame sync structure.
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
void ff_framesync_uninit(FFFrameSync *fs)
Free all memory currently allocated.
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)
int ff_framesync_get_frame(FFFrameSync *fs, unsigned in, AVFrame **rframe, unsigned get)
Get the current frame in an input.
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
char * av_asprintf(const char *fmt,...)
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 query_formats(AVFilterContext *ctx)
const char * name
Filter name.
@ EXT_INFINITY
Extend the frame to infinity.
A link between two filters.
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 int ff_insert_inpad(AVFilterContext *f, unsigned index, AVFilterPad *p)
Insert a new input pad for the filter.
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
static av_cold void uninit(AVFilterContext *ctx)
@ EXT_STOP
Completely stop all streams with this one.
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
static const AVFilterPad outputs[]
static int activate(AVFilterContext *ctx)
#define AVFILTER_FLAG_DYNAMIC_INPUTS
The number of the filter inputs is not determined just by AVFilter.inputs.
A filter pad used for either input or output.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static av_cold int init(AVFilterContext *ctx)
int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
Fill plane linesizes for an image with pixel format pix_fmt and width width.
#define AV_CEIL_RSHIFT(a, b)
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().
AVRational sample_aspect_ratio
agreed upon sample aspect ratio
AVRational frame_rate
Frame rate of the stream on the link, or 1/0 if unknown or variable; if left to 0/0,...
static enum AVPixelFormat pix_fmts[]
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
static int process_frame(FFFrameSync *fs)
static int config_output(AVFilterLink *outlink)
Describe the class of an AVClass context structure.
#define fs(width, name, subs,...)
Rational number (pair of numerator and denominator).
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
int format
agreed upon media format
#define AV_PIX_FMT_FLAG_BITSTREAM
All values of a component are bit-wise packed end to end.
AVFilterContext * src
source filter
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
#define AVFILTER_DEFINE_CLASS(fname)
const AVPixFmtDescriptor * desc
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 layout
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)
int w
agreed upon image width
const char * name
Pad name.
enum AVMediaType type
AVFilterPad type.
int ff_framesync_init(FFFrameSync *fs, AVFilterContext *parent, unsigned nb_in)
Initialize a frame sync structure.
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
int h
agreed upon image height
AVRational time_base
Define the time base used by the PTS of the frames/samples which will pass through this link.
char * av_strdup(const char *s)
Duplicate a string.
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
#define flags(name, subs,...)
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
int ff_framesync_activate(FFFrameSync *fs)
Examine the frames in the filter's input and try to produce output.
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
static const AVOption stack_options[]