111 double var_values[
VARS_NB], res;
121 var_values[
VAR_A] = (double) inlink->
w / inlink->
h;
150 if (adjusted_aspect.
num && adjusted_aspect.
den) {
163 s->
x = var_values[
VAR_X] = res;
168 s->
y = var_values[
VAR_Y] = res;
174 s->
x = var_values[
VAR_X] = res;
176 if (s->
x < 0 || s->
x + inlink->
w > s->
w)
177 s->
x = var_values[
VAR_X] = (s->
w - inlink->
w) / 2;
178 if (s->
y < 0 || s->
y + inlink->
h > s->
h)
179 s->
y = var_values[
VAR_Y] = (s->
h - inlink->
h) / 2;
184 if (s->
w < inlink->
w || s->
h < inlink->
h) {
185 av_log(ctx,
AV_LOG_ERROR,
"Padded dimensions cannot be smaller than input dimensions.\n");
197 inlink->
w, inlink->
h, s->
w, s->
h, s->
x, s->
y,
200 if (s->
x < 0 || s->
y < 0 ||
201 s->
w <= 0 || s->
h <= 0 ||
202 (
unsigned)s->
x + (
unsigned)inlink->
w > s->
w ||
203 (
unsigned)s->
y + (
unsigned)inlink->
h > s->
h) {
205 "Input area %d:%d:%d:%d not within the padded area 0:0:%d:%d or zero-sized\n",
206 s->
x, s->
y, s->
x + inlink->
w, s->
y + inlink->
h, s->
w, s->
h);
214 "Error when evaluating the expression '%s'\n", expr);
238 w + (s->
w - s->
in_w),
239 h + (s->
h - s->
in_h) + (s->
x > 0));
247 for (plane = 0; plane < 4 && frame->
data[plane] && frame->
linesize[plane]; plane++) {
271 for (i = 0; i < FF_ARRAY_ELEMS(planes) && planes[i] >= 0; i++) {
282 (s->
y >> vsub) * frame->
linesize[planes[i]];
283 ptrdiff_t req_end = ((s->
w - s->
x - frame->
width) >>
hsub) *
289 if (start - buf->
data < req_start ||
290 (buf->
data + buf->
size) - end < req_end)
293 for (j = 0; j < FF_ARRAY_ELEMS(planes) && planes[j] >= 0; j++) {
294 int vsub1 = s->
draw.
vsub[planes[j]];
301 if (
FFSIGN(start - end1) !=
FFSIGN(start - end1 - req_start) ||
317 for (i = 0; i < 4 && frame->
buf[
i]; i++)
387 if (s->
h > s->
y + s->
in_h) {
416 #define OFFSET(x) offsetof(PadContext, x) 417 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM 460 .priv_class = &pad_class,
462 .
inputs = avfilter_vf_pad_inputs,
463 .
outputs = avfilter_vf_pad_outputs,
AVFilterFormats * ff_draw_supported_pixel_formats(unsigned flags)
Return the list of pixel formats supported by the draw functions.
static AVFrame * get_video_buffer(AVFilterLink *inlink, int w, int h)
AVRational av_div_q(AVRational b, AVRational c)
Divide one rational by another.
This structure describes decoded (raw) audio or video data.
void ff_copy_rectangle2(FFDrawContext *draw, uint8_t *dst[], int dst_linesize[], uint8_t *src[], int src_linesize[], int dst_x, int dst_y, int src_x, int src_y, int w, int h)
Copy a rectangle from an image to another.
Main libavfilter public API header.
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
int h
agreed upon image height
int in_h
width and height for the padded input video, which has to be aligned to the chroma values in order to...
char * x_expr
width expression string
static const AVFilterPad avfilter_vf_pad_outputs[]
static int config_output(AVFilterLink *outlink)
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir, int value)
Round a dimension according to subsampling.
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.
AVFILTER_DEFINE_CLASS(pad)
static av_cold int end(AVCodecContext *avctx)
static const char *const var_names[]
#define AV_LOG_VERBOSE
Detailed information.
A filter pad used for either input or output.
A link between two filters.
int av_expr_parse_and_eval(double *d, const char *s, const char *const *const_names, const double *const_values, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), void *opaque, int log_offset, void *log_ctx)
Parse and evaluate an expression.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Various defines for YUV<->RGB conversion.
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
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
static int config_input(AVFilterLink *inlink)
void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])
Prepare a color.
static const AVOption pad_options[]
int w
agreed upon image width
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
static int frame_needs_copy(PadContext *s, AVFrame *frame)
static int buffer_needs_copy(PadContext *s, AVFrame *frame, AVBufferRef *buf)
AVBufferRef * av_frame_get_plane_buffer(AVFrame *frame, int plane)
Get the buffer reference a given data plane is stored in.
char * w_expr
width expression string
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 the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
int y
offsets of the input area with respect to the padded area
AVFilterContext * src
source filter
static const AVFilterPad outputs[]
int format
agreed upon media format
#define FF_ARRAY_ELEMS(a)
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
uint8_t rgba_color[4]
color for the padding area
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.
static const AVFilterPad avfilter_vf_pad_inputs[]
int eval_mode
expression evaluation mode
uint8_t * data
The data buffer.
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
static const struct @324 planes[]
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).
const char * name
Filter name.
int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
Init a draw context.
AVRational sample_aspect_ratio
agreed upon sample aspect ratio
AVFilterLink ** outputs
array of pointers to output links
int size
Size of data in bytes.
static int query_formats(AVFilterContext *ctx)
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
A reference to a data buffer.
common internal and external API header
char * y_expr
height expression string
AVFilterContext * dst
dest filter
int pixelstep[MAX_PLANES]
int h
output dimensions, a value of 0 will result in the input size
char * h_expr
height expression string
void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color, uint8_t *dst[], int dst_linesize[], int dst_x, int dst_y, int w, int h)
Fill a rectangle with an uniform color.
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
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
simple arithmetic expression evaluator