185 if ((vars_w[
VAR_OUT_H] || vars_w[VAR_OH]) &&
190 if (ctx->
filter != &ff_vf_scale2ref &&
202 av_log(ctx,
AV_LOG_ERROR,
"Expressions with scale2ref variables are not valid in scale filter.\n");
212 vars_w[VAR_S2R_MAIN_POS] || vars_h[VAR_S2R_MAIN_POS]) ) {
213 av_log(ctx,
AV_LOG_ERROR,
"Expressions with frame variables 'n', 't', 'pos' are not valid in init eval_mode.\n");
223 int ret, is_inited = 0;
224 char *old_str_expr =
NULL;
235 old_pexpr = *pexpr_ptr;
268 *pexpr_ptr = old_pexpr;
280 "Size and width/height expressions cannot be set at the same time.\n");
291 "Invalid size '%s'\n", scale->
size_str);
294 snprintf(buf,
sizeof(buf)-1,
"%d", scale->
w);
296 snprintf(buf,
sizeof(buf)-1,
"%d", scale->
h);
387 if (s && strstr(s,
"bt709")) {
389 }
else if (s && strstr(s,
"fcc")) {
391 }
else if (s && strstr(s,
"smpte240m")) {
393 }
else if (s && (strstr(s,
"bt601") || strstr(s,
"bt470") || strstr(s,
"smpte170m"))) {
395 }
else if (s && strstr(s,
"bt2020")) {
399 if (colorspace < 1 || colorspace > 10 || colorspace == 8) {
422 main_link = ctx->
inputs[0];
477 "Error when evaluating the expression '%s'.\n", expr);
500 if (scale->
w > INT_MAX ||
501 scale->
h > INT_MAX ||
502 (scale->
h * inlink->
w) > INT_MAX ||
503 (scale->
w * inlink->
h) > INT_MAX)
506 outlink->
w = scale->
w;
507 outlink->
h = scale->
h;
523 if (inlink0->
w == outlink->
w &&
524 inlink0->
h == outlink->
h &&
533 for (i = 0; i < 3; i++) {
567 in_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192;
591 av_log(ctx,
AV_LOG_VERBOSE,
"w:%d h:%d fmt:%s sar:%d/%d -> w:%d h:%d fmt:%s sar:%d/%d flags:0x%0x\n",
607 outlink->
w = inlink->
w;
608 outlink->
h = inlink->
h;
631 int in_stride[4],out_stride[4];
634 for (i=0; i<4; i++) {
635 int vsub= ((i+1)&2) ? scale->
vsub : 0;
642 in[1] = cur_pic->
data[1];
644 out[1] = out_buf->
data[1];
646 return sws_scale(sws, in, in_stride, y/mul, h,
665 frame_changed = in->
width != link->
w ||
680 ctx->
filter != &ff_vf_scale2ref &&
682 !(vars_h[
VAR_N] || vars_h[
VAR_T] || vars_h[VAR_POS]) &&
683 scale->
w && scale->
h)
687 snprintf(buf,
sizeof(buf)-1,
"%d", outlink->
w);
689 snprintf(buf,
sizeof(buf)-1,
"%d", outlink->
h);
701 if (ctx->
filter == &ff_vf_scale2ref) {
753 const int *inv_table, *
table;
756 (
int **)&table, &out_full,
757 &brightness, &contrast, &saturation);
775 brightness, contrast, saturation);
779 brightness, contrast, saturation);
783 brightness, contrast, saturation);
802 slice_h = slice_end - slice_start;
803 scale_slice(link, out, in, scale->
sws, slice_start, slice_h, 1, 0);
833 frame_changed = in->
width != link->
w ||
859 char *res,
int res_len,
int flags)
866 w = !strcmp(cmd,
"width") || !strcmp(cmd,
"w");
867 h = !strcmp(cmd,
"height") || !strcmp(cmd,
"h");
878 av_log(ctx,
AV_LOG_ERROR,
"Failed to process command. Continuing with existing parameters.\n");
883 #if FF_API_CHILD_CLASS_NEXT 893 *iter = (
void*)(uintptr_t)
c;
897 #define OFFSET(x) offsetof(ScaleContext, x) 898 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM 899 #define TFLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM 938 {
"force_divisible_by",
"enforce that the output resolution is divisible by a defined integer when force_original_aspect_ratio is used",
OFFSET(
force_divisible_by),
AV_OPT_TYPE_INT, { .i64 = 1}, 1, 256, FLAGS },
954 #if FF_API_CHILD_CLASS_NEXT 955 .child_class_next = child_class_next,
980 .description =
NULL_IF_CONFIG_SMALL(
"Scale the input video size and/or convert the image format."),
985 .priv_class = &scale_class,
986 .
inputs = avfilter_vf_scale_inputs,
987 .
outputs = avfilter_vf_scale_outputs,
997 #if FF_API_CHILD_CLASS_NEXT 998 .child_class_next = child_class_next,
1034 .
name =
"scale2ref",
1035 .description =
NULL_IF_CONFIG_SMALL(
"Scale the input video size and/or convert the image format to the given reference."),
1040 .priv_class = &scale2ref_class,
1041 .
inputs = avfilter_vf_scale2ref_inputs,
1042 .
outputs = avfilter_vf_scale2ref_outputs,
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
static av_cold int init_dict(AVFilterContext *ctx, AVDictionary **opts)
static enum AVPixelFormat pix_fmt
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
This structure describes decoded (raw) audio or video data.
int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str)
Parse str and put in width_ptr and height_ptr the detected values.
int64_t pkt_pos
reordered pos from the last AVPacket that has been input into the decoder
#define AV_LOG_WARNING
Something somehow does not look correct.
#define LIBAVUTIL_VERSION_INT
Main libavfilter public API header.
int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation)
also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601 ...
int h
agreed upon image height
static int scale_slice(AVFilterLink *link, AVFrame *out_buf, AVFrame *cur_pic, struct SwsContext *sws, int y, int h, int mul, int field)
const char * av_default_item_name(void *ptr)
Return the context name.
int eval_mode
expression evaluation mode
int sws_isSupportedEndiannessConversion(enum AVPixelFormat pix_fmt)
int force_original_aspect_ratio
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.
AVFilterFormatsConfig outcfg
Lists of supported formats / etc.
const AVClass * sws_get_class(void)
Get the AVClass for swsContext.
int vsub
chroma subsampling
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
int output_is_pal
set to 1 if the output format is paletted
functionally identical to above
const char * name
Pad name.
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
AVFilterLink ** inputs
array of pointers to input links
char * w_expr
width expression string
static int query_formats(AVFilterContext *ctx)
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
av_warn_unused_result int sws_init_context(struct SwsContext *sws_context, SwsFilter *srcFilter, SwsFilter *dstFilter)
Initialize the swscaler context sws_context.
char * h_expr
height expression string
8 bits with AV_PIX_FMT_RGB32 palette
static const AVClass * child_class_iterate(void **iter)
AVColorSpace
YUV colorspace type.
int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Used by Dirac / VC-2 and H.264 FRext, see ITU-T SG16.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
static const int * parse_yuv_type(const char *s, enum AVColorSpace colorspace)
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
static const AVClass scale_class
#define AV_LOG_VERBOSE
Detailed information.
int interlaced_frame
The content of the picture is interlaced.
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
static int scale_frame(AVFilterLink *link, AVFrame *in, AVFrame **frame_out)
static const uint16_t table[]
A filter pad used for either input or output.
static void * av_x_if_null(const void *p, const void *x)
Return x default pointer in case p is NULL.
A link between two filters.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
static const AVClass scale2ref_class
static const AVOption scale_options[]
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.
int av_opt_eval_flags(void *obj, const AVOption *o, const char *val, int *flags_out)
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#define sws_isSupportedOutput(x)
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 field
#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
enum AVColorRange color_range
MPEG vs JPEG YUV range.
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
enum AVColorSpace colorspace
YUV colorspace type.
AVRational time_base
Define the time base used by the PTS of the frames/samples which will pass through this link...
simple assert() macros that are a bit more flexible than ISO C assert().
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
static int scale_parse_expr(AVFilterContext *ctx, char *str_expr, AVExpr **pexpr_ptr, const char *var, const char *args)
static float mul(float src0, float src1)
static int config_props(AVFilterLink *outlink)
int w
agreed upon image width
const AVOption * av_opt_find(void *obj, const char *name, const char *unit, int opt_flags, int search_flags)
Look for an option in an object.
common internal API header
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
enum AVPixelFormat av_pix_fmt_desc_get_id(const AVPixFmtDescriptor *desc)
static av_cold void uninit(AVFilterContext *ctx)
static const AVFilterPad avfilter_vf_scale_outputs[]
static int request_frame(AVFilterLink *outlink)
ITU-R BT2020 non-constant luminance system.
void sws_freeContext(struct SwsContext *swsContext)
Free the swscaler context swsContext.
static int check_exprs(AVFilterContext *ctx)
const int * sws_getCoefficients(int colorspace)
Return a pointer to yuv<->rgb coefficients for the given colorspace suitable for sws_setColorspaceDet...
AVFilterContext * src
source filter
#define sws_isSupportedInput(x)
int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation)
static int scale_eval_dimensions(AVFilterContext *ctx)
FCC Title 47 Code of Federal Regulations 73.682 (a)(20)
static const AVFilterPad outputs[]
int format
agreed upon media format
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
static int config_props_ref(AVFilterLink *outlink)
static int filter_frame_ref(AVFilterLink *link, AVFrame *in)
packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
char * av_strdup(const char *s)
Duplicate a string.
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.
struct SwsContext * sws
software scaler context
static int request_frame_ref(AVFilterLink *outlink)
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
static const AVFilterPad avfilter_vf_scale_inputs[]
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
static const AVFilterPad avfilter_vf_scale2ref_outputs[]
int attribute_align_arg sws_scale(struct SwsContext *c, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dst[], const int dstStride[])
swscale wrapper, so we don't need to export the SwsContext.
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.
AVRational sample_aspect_ratio
agreed upon sample aspect ratio
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 link
int input_is_pal
set to 1 if the input format is paletted
static const char *const var_names[]
struct SwsContext * sws_alloc_context(void)
Allocate an empty SwsContext.
AVFilterLink ** outputs
array of pointers to output links
int ff_scale_adjust_dimensions(AVFilterLink *inlink, int *ret_w, int *ret_h, int force_original_aspect_ratio, int force_divisible_by)
Transform evaluated width and height obtained from ff_scale_eval_dimensions into actual target width ...
struct SwsContext * isws[2]
software scaler context for interlaced material
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
static int filter_frame(AVFilterLink *link, AVFrame *in)
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
Narrow or limited range content.
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
double var_values[VARS_NB]
#define AV_OPT_SEARCH_FAKE_OBJ
The obj passed to av_opt_find() is fake – only a double pointer to AVClass instead of a required poi...
AVFilterFormatsConfig incfg
Lists of supported formats / etc.
#define SWS_PARAM_DEFAULT
int slice_y
top of current output slice
int av_expr_count_vars(AVExpr *e, unsigned *counter, int size)
Track the presence of variables and their number of occurrences in a parsed expression.
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
AVFilterContext * dst
dest filter
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
#define FFSWAP(type, a, b)
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
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.
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
const AVFilter * filter
the AVFilter of which this is an instance
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
static const AVFilterPad avfilter_vf_scale2ref_inputs[]
simple arithmetic expression evaluator
const AVPixFmtDescriptor * av_pix_fmt_desc_next(const AVPixFmtDescriptor *prev)
Iterate over all pixel format descriptors known to libavutil.