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mpv/video/img_format.c
wm4 98352362ea img_format: remove some unused format flags 
They were used at some point, but then fell into disuse. In general,
these old flags are all a bit fuzzy, so it's a good idea to remove them
as much as possible.

The comment about MP_IMGFLAG_PAL isn't true anymore. The old meaning was
deprecated at some point, and the flag was removed from "pseudo
paletted" formats. I think mpv at one point changed its own flag from
AV_PIX_FMT_FLAG_PSEUDOPAL to AV_PIX_FMT_FLAG_PAL, when the former was
deprecated, and it became unnecessary to allocate a palette for
non-paletted formats. (The one who deprecated in FFmpeg was me, if you
wonder.)

MP_IMGFLAG_PLANAR was used in command.c, use a relatively similar flag
as replacement.
2019-11-03 23:18:35 +01:00

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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <string.h>
#include <libavcodec/avcodec.h>
#include <libavutil/pixfmt.h>
#include <libavutil/pixdesc.h>
#include "config.h"
#include "video/img_format.h"
#include "video/mp_image.h"
#include "video/fmt-conversion.h"
struct mp_imgfmt_entry {
const char *name;
int fmt;
};
static const struct mp_imgfmt_entry mp_imgfmt_list[] = {
// not in ffmpeg
{"vdpau_output", IMGFMT_VDPAU_OUTPUT},
{"rgb30", IMGFMT_RGB30},
// FFmpeg names have an annoying "_vld" suffix
{"videotoolbox", IMGFMT_VIDEOTOOLBOX},
{"vaapi", IMGFMT_VAAPI},
{"none", 0},
{0}
};
char **mp_imgfmt_name_list(void)
{
int count = IMGFMT_END - IMGFMT_START;
char **list = talloc_zero_array(NULL, char *, count + 1);
int num = 0;
for (int n = IMGFMT_START; n < IMGFMT_END; n++) {
const char *name = mp_imgfmt_to_name(n);
if (strcmp(name, "unknown") != 0)
list[num++] = talloc_strdup(list, name);
}
return list;
}
int mp_imgfmt_from_name(bstr name)
{
int img_fmt = 0;
for (const struct mp_imgfmt_entry *p = mp_imgfmt_list; p->name; ++p) {
if (bstr_equals0(name, p->name)) {
img_fmt = p->fmt;
break;
}
}
if (!img_fmt) {
char *t = bstrdup0(NULL, name);
img_fmt = pixfmt2imgfmt(av_get_pix_fmt(t));
talloc_free(t);
}
return img_fmt;
}
char *mp_imgfmt_to_name_buf(char *buf, size_t buf_size, int fmt)
{
const char *name = NULL;
const struct mp_imgfmt_entry *p = mp_imgfmt_list;
for (; p->fmt; p++) {
if (p->name && p->fmt == fmt) {
name = p->name;
break;
}
}
if (!name) {
const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(imgfmt2pixfmt(fmt));
if (pixdesc)
name = pixdesc->name;
}
if (!name)
name = "unknown";
snprintf(buf, buf_size, "%s", name);
int len = strlen(buf);
if (len > 2 && buf[len - 2] == MP_SELECT_LE_BE('l', 'b') && buf[len - 1] == 'e')
buf[len - 2] = '\0';
return buf;
}
static struct mp_imgfmt_desc mp_only_imgfmt_desc(int mpfmt)
{
switch (mpfmt) {
case IMGFMT_VDPAU_OUTPUT:
return (struct mp_imgfmt_desc) {
.id = mpfmt,
.avformat = AV_PIX_FMT_NONE,
.flags = MP_IMGFLAG_BE | MP_IMGFLAG_LE | MP_IMGFLAG_RGB |
MP_IMGFLAG_HWACCEL,
};
case IMGFMT_RGB30:
return (struct mp_imgfmt_desc) {
.id = mpfmt,
.avformat = AV_PIX_FMT_NONE,
.flags = MP_IMGFLAG_BYTE_ALIGNED | MP_IMGFLAG_NE | MP_IMGFLAG_RGB,
.num_planes = 1,
.align_x = 1,
.align_y = 1,
.bytes = {4},
.bpp = {32},
.plane_bits = 30,
.component_bits = 10,
};
}
return (struct mp_imgfmt_desc) {0};
}
struct mp_imgfmt_desc mp_imgfmt_get_desc(int mpfmt)
{
enum AVPixelFormat fmt = imgfmt2pixfmt(mpfmt);
const AVPixFmtDescriptor *pd = av_pix_fmt_desc_get(fmt);
if (!pd || pd->nb_components > 4 || fmt == AV_PIX_FMT_NONE ||
fmt == AV_PIX_FMT_UYYVYY411)
return mp_only_imgfmt_desc(mpfmt);
enum mp_component_type is_uint =
mp_imgfmt_get_component_type(mpfmt) == MP_COMPONENT_TYPE_UINT;
struct mp_imgfmt_desc desc = {
.id = mpfmt,
.avformat = fmt,
.chroma_xs = pd->log2_chroma_w,
.chroma_ys = pd->log2_chroma_h,
};
int planedepth[4] = {0};
int el_size = (pd->flags & AV_PIX_FMT_FLAG_BITSTREAM) ? 1 : 8;
bool need_endian = false; // single component is spread over >1 bytes
int shift = -1; // shift for all components, or -1 if not uniform
for (int c = 0; c < pd->nb_components; c++) {
AVComponentDescriptor d = pd->comp[c];
// multiple components per plane -> Y is definitive, ignore chroma
if (!desc.bpp[d.plane])
desc.bpp[d.plane] = d.step * el_size;
planedepth[d.plane] += d.depth;
need_endian |= (d.depth + d.shift) > 8;
if (c == 0)
desc.component_bits = d.depth;
if (d.depth != desc.component_bits)
desc.component_bits = 0;
if (c == 0)
shift = d.shift;
if (shift != d.shift)
shift = -1;
}
for (int p = 0; p < 4; p++) {
if (desc.bpp[p])
desc.num_planes++;
}
desc.plane_bits = planedepth[0];
// Check whether any components overlap other components (per plane).
// We're cheating/simplifying here: we assume that this happens if a shift
// is set - which is wrong in general (could be needed for padding, instead
// of overlapping bits of another component - use the "< 8" test to exclude
// "normal" formats which use this for padding, like p010).
// Needed for rgb444le/be.
bool component_byte_overlap = false;
for (int c = 0; c < pd->nb_components; c++) {
AVComponentDescriptor d = pd->comp[c];
component_byte_overlap |= d.shift > 0 && planedepth[d.plane] > 8 &&
desc.component_bits < 8;
}
// If every component sits in its own byte, or all components are within
// a single byte, no endian-dependent access is needed. If components
// stride bytes (like with packed 2 byte RGB formats), endian-dependent
// access is needed.
need_endian |= component_byte_overlap;
if (!need_endian) {
desc.flags |= MP_IMGFLAG_LE | MP_IMGFLAG_BE;
} else {
desc.flags |= (pd->flags & AV_PIX_FMT_FLAG_BE)
? MP_IMGFLAG_BE : MP_IMGFLAG_LE;
}
if ((pd->flags & AV_PIX_FMT_FLAG_HWACCEL)) {
desc.flags |= MP_IMGFLAG_HWACCEL;
} else if (fmt == AV_PIX_FMT_XYZ12LE || fmt == AV_PIX_FMT_XYZ12BE) {
/* nothing */
} else if (!(pd->flags & AV_PIX_FMT_FLAG_RGB) &&
fmt != AV_PIX_FMT_MONOBLACK &&
fmt != AV_PIX_FMT_PAL8)
{
desc.flags |= MP_IMGFLAG_YUV;
} else {
desc.flags |= MP_IMGFLAG_RGB;
}
if (pd->flags & AV_PIX_FMT_FLAG_ALPHA)
desc.flags |= MP_IMGFLAG_ALPHA;
if (mpfmt >= IMGFMT_RGB0_START && mpfmt <= IMGFMT_RGB0_END)
desc.flags &= ~MP_IMGFLAG_ALPHA;
if (!(pd->flags & AV_PIX_FMT_FLAG_HWACCEL) &&
!(pd->flags & AV_PIX_FMT_FLAG_BITSTREAM))
{
desc.flags |= MP_IMGFLAG_BYTE_ALIGNED;
for (int p = 0; p < desc.num_planes; p++)
desc.bytes[p] = desc.bpp[p] / 8;
}
if (pd->flags & AV_PIX_FMT_FLAG_PAL)
desc.flags |= MP_IMGFLAG_PAL;
if ((desc.flags & (MP_IMGFLAG_YUV | MP_IMGFLAG_RGB))
&& (desc.flags & MP_IMGFLAG_BYTE_ALIGNED)
&& !(pd->flags & AV_PIX_FMT_FLAG_PAL)
&& !component_byte_overlap
&& shift >= 0 && is_uint)
{
bool same_depth = true;
for (int p = 0; p < desc.num_planes; p++) {
same_depth &= planedepth[p] == planedepth[0] &&
desc.bpp[p] == desc.bpp[0];
}
if (same_depth && pd->nb_components == desc.num_planes) {
if (desc.flags & MP_IMGFLAG_YUV) {
desc.flags |= MP_IMGFLAG_YUV_P;
} else {
desc.flags |= MP_IMGFLAG_RGB_P;
}
}
if (pd->nb_components == 3 && desc.num_planes == 2 &&
planedepth[1] == planedepth[0] * 2 &&
desc.bpp[1] == desc.bpp[0] * 2 &&
(desc.flags & MP_IMGFLAG_YUV))
{
desc.flags |= MP_IMGFLAG_YUV_NV;
}
if (desc.flags & (MP_IMGFLAG_YUV_P | MP_IMGFLAG_RGB_P | MP_IMGFLAG_YUV_NV))
desc.component_bits += shift;
}
for (int p = 0; p < desc.num_planes; p++) {
desc.xs[p] = (p == 1 || p == 2) ? desc.chroma_xs : 0;
desc.ys[p] = (p == 1 || p == 2) ? desc.chroma_ys : 0;
}
desc.align_x = 1 << desc.chroma_xs;
desc.align_y = 1 << desc.chroma_ys;
if ((desc.bpp[0] % 8) != 0)
desc.align_x = 8 / desc.bpp[0]; // expect power of 2
if (desc.flags & MP_IMGFLAG_HWACCEL) {
desc.component_bits = 0;
desc.plane_bits = 0;
}
return desc;
}
static bool validate_regular_imgfmt(const struct mp_regular_imgfmt *fmt)
{
bool present[MP_NUM_COMPONENTS] = {0};
int n_comp = 0;
for (int n = 0; n < fmt->num_planes; n++) {
const struct mp_regular_imgfmt_plane *plane = &fmt->planes[n];
n_comp += plane->num_components;
if (n_comp > MP_NUM_COMPONENTS)
return false;
if (!plane->num_components)
return false; // no empty planes in between allowed
bool pad_only = true;
int chroma_luma = 0; // luma: 1, chroma: 2, both: 3
for (int i = 0; i < plane->num_components; i++) {
int comp = plane->components[i];
if (comp > MP_NUM_COMPONENTS)
return false;
if (comp == 0)
continue;
pad_only = false;
if (present[comp - 1])
return false; // no duplicates
present[comp - 1] = true;
chroma_luma |= (comp == 2 || comp == 3) ? 2 : 1;
}
if (pad_only)
return false; // no planes with only padding allowed
if ((fmt->chroma_w > 1 || fmt->chroma_h > 1) && chroma_luma == 3)
return false; // separate chroma/luma planes required
}
if (!(present[0] || present[3]) || // at least component 1 or alpha needed
(present[1] && !present[0]) || // component 2 requires component 1
(present[2] && !present[1])) // component 3 requires component 2
return false;
return true;
}
enum mp_csp mp_imgfmt_get_forced_csp(int imgfmt)
{
if (imgfmt == IMGFMT_RGB30)
return MP_CSP_RGB;
enum AVPixelFormat pixfmt = imgfmt2pixfmt(imgfmt);
const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(pixfmt);
// FFmpeg does not provide a flag for XYZ, so this is the best we can do.
if (pixdesc && strncmp(pixdesc->name, "xyz", 3) == 0)
return MP_CSP_XYZ;
if (pixdesc && (pixdesc->flags & AV_PIX_FMT_FLAG_RGB))
return MP_CSP_RGB;
if (pixfmt == AV_PIX_FMT_PAL8 || pixfmt == AV_PIX_FMT_MONOBLACK)
return MP_CSP_RGB;
return MP_CSP_AUTO;
}
enum mp_component_type mp_imgfmt_get_component_type(int imgfmt)
{
if (imgfmt == IMGFMT_RGB30)
return MP_COMPONENT_TYPE_UINT;
const AVPixFmtDescriptor *pixdesc =
av_pix_fmt_desc_get(imgfmt2pixfmt(imgfmt));
if (!pixdesc || (pixdesc->flags & AV_PIX_FMT_FLAG_HWACCEL))
return MP_COMPONENT_TYPE_UNKNOWN;
#if LIBAVUTIL_VERSION_MICRO >= 100
if (pixdesc->flags & AV_PIX_FMT_FLAG_FLOAT)
return MP_COMPONENT_TYPE_FLOAT;
#endif
return MP_COMPONENT_TYPE_UINT;
}
static bool is_native_endian(const AVPixFmtDescriptor *pixdesc)
{
enum AVPixelFormat pixfmt = av_pix_fmt_desc_get_id(pixdesc);
enum AVPixelFormat other = av_pix_fmt_swap_endianness(pixfmt);
if (other == AV_PIX_FMT_NONE || other == pixfmt)
return true; // no endian nonsense
bool is_le = *(char *)&(uint32_t){1};
return pixdesc && (is_le != !!(pixdesc->flags & AV_PIX_FMT_FLAG_BE));
}
bool mp_get_regular_imgfmt(struct mp_regular_imgfmt *dst, int imgfmt)
{
struct mp_regular_imgfmt res = {0};
const AVPixFmtDescriptor *pixdesc =
av_pix_fmt_desc_get(imgfmt2pixfmt(imgfmt));
if (!pixdesc || (pixdesc->flags & AV_PIX_FMT_FLAG_BITSTREAM) ||
(pixdesc->flags & AV_PIX_FMT_FLAG_HWACCEL) ||
(pixdesc->flags & AV_PIX_FMT_FLAG_PAL) ||
pixdesc->nb_components < 1 ||
pixdesc->nb_components > MP_NUM_COMPONENTS ||
!is_native_endian(pixdesc))
return false;
res.component_type = mp_imgfmt_get_component_type(imgfmt);
if (!res.component_type)
return false;
const AVComponentDescriptor *comp0 = &pixdesc->comp[0];
int depth = comp0->depth + comp0->shift;
if (depth < 1 || depth > 64)
return false;
res.component_size = (depth + 7) / 8;
for (int n = 0; n < pixdesc->nb_components; n++) {
const AVComponentDescriptor *comp = &pixdesc->comp[n];
if (comp->plane < 0 || comp->plane >= MP_MAX_PLANES)
return false;
res.num_planes = MPMAX(res.num_planes, comp->plane + 1);
// We support uniform depth only.
if (comp->depth != comp0->depth || comp->shift != comp0->shift)
return false;
// Uniform component size; even the padding must have same size.
int ncomp = comp->step / res.component_size;
if (!ncomp || ncomp * res.component_size != comp->step)
return false;
struct mp_regular_imgfmt_plane *plane = &res.planes[comp->plane];
if (plane->num_components && plane->num_components != ncomp)
return false;
plane->num_components = ncomp;
int pos = comp->offset / res.component_size;
if (pos < 0 || pos >= ncomp || ncomp > MP_NUM_COMPONENTS)
return false;
if (plane->components[pos])
return false;
plane->components[pos] = n + 1;
}
// Make sure alpha is always component 4.
if (pixdesc->nb_components == 2 && (pixdesc->flags & AV_PIX_FMT_FLAG_ALPHA)) {
for (int n = 0; n < res.num_planes; n++) {
for (int i = 0; i < res.planes[n].num_components; i++) {
if (res.planes[n].components[i] == 2)
res.planes[n].components[i] = 4;
}
}
}
res.component_pad = comp0->depth - res.component_size * 8;
if (comp0->shift) {
// We support padding only on 1 side.
if (comp0->shift + comp0->depth != res.component_size * 8)
return false;
res.component_pad = -res.component_pad;
}
res.chroma_w = 1 << pixdesc->log2_chroma_w;
res.chroma_h = 1 << pixdesc->log2_chroma_h;
#if LIBAVUTIL_VERSION_MICRO >= 100
if (pixdesc->flags & AV_PIX_FMT_FLAG_BAYER)
return false; // it's satan himself
#endif
res.forced_csp = mp_imgfmt_get_forced_csp(imgfmt);
if (!validate_regular_imgfmt(&res))
return false;
*dst = res;
return true;
}
static bool regular_imgfmt_equals(struct mp_regular_imgfmt *a,
struct mp_regular_imgfmt *b)
{
if (a->component_type != b->component_type ||
a->component_size != b->component_size ||
a->num_planes != b->num_planes ||
a->component_pad != b->component_pad ||
a->forced_csp != b->forced_csp ||
a->chroma_w != b->chroma_w ||
a->chroma_h != b->chroma_h)
return false;
for (int n = 0; n < a->num_planes; n++) {
int num_comps = a->planes[n].num_components;
if (num_comps != b->planes[n].num_components)
return false;
for (int i = 0; i < num_comps; i++) {
if (a->planes[n].components[i] != b->planes[n].components[i])
return false;
}
}
return true;
}
// Find a format that matches this one exactly.
int mp_find_regular_imgfmt(struct mp_regular_imgfmt *src)
{
for (int n = IMGFMT_START + 1; n < IMGFMT_END; n++) {
struct mp_regular_imgfmt f;
if (mp_get_regular_imgfmt(&f, n) && regular_imgfmt_equals(src, &f))
return n;
}
return 0;
}
// Find a format that has the given flags set with the following configuration.
int mp_imgfmt_find(int xs, int ys, int planes, int component_bits, int flags)
{
for (int n = IMGFMT_START + 1; n < IMGFMT_END; n++) {
struct mp_imgfmt_desc desc = mp_imgfmt_get_desc(n);
if (desc.id && ((desc.flags & flags) == flags)) {
if (desc.num_planes == planes && desc.chroma_xs == xs &&
desc.chroma_ys == ys && desc.plane_bits == component_bits &&
(desc.flags & MP_IMGFLAG_NE))
return desc.id;
}
}
return 0;
}
#if LIBAVUTIL_VERSION_MICRO < 100
#define avcodec_find_best_pix_fmt_of_list avcodec_find_best_pix_fmt2
#endif
// Compare the dst image formats, and return the one which can carry more data
// (e.g. higher depth, more color components, lower chroma subsampling, etc.),
// with respect to what is required to keep most of the src format.
// Returns the imgfmt, or 0 on error.
int mp_imgfmt_select_best(int dst1, int dst2, int src)
{
enum AVPixelFormat dst1pxf = imgfmt2pixfmt(dst1);
enum AVPixelFormat dst2pxf = imgfmt2pixfmt(dst2);
enum AVPixelFormat srcpxf = imgfmt2pixfmt(src);
enum AVPixelFormat dstlist[] = {dst1pxf, dst2pxf, AV_PIX_FMT_NONE};
return pixfmt2imgfmt(avcodec_find_best_pix_fmt_of_list(dstlist, srcpxf, 1, 0));
}
// Same as mp_imgfmt_select_best(), but with a list of dst formats.
int mp_imgfmt_select_best_list(int *dst, int num_dst, int src)
{
int best = 0;
for (int n = 0; n < num_dst; n++)
best = best ? mp_imgfmt_select_best(best, dst[n], src) : dst[n];
return best;
}
#if 0
#include <libavutil/frame.h>
#include "sws_utils.h"
int main(int argc, char **argv)
{
const AVPixFmtDescriptor *avd = av_pix_fmt_desc_next(NULL);
for (; avd; avd = av_pix_fmt_desc_next(avd)) {
enum AVPixelFormat fmt = av_pix_fmt_desc_get_id(avd);
if (fmt == AV_PIX_FMT_YUVJ420P || fmt == AV_PIX_FMT_YUVJ422P ||
fmt == AV_PIX_FMT_YUVJ444P || fmt == AV_PIX_FMT_YUVJ440P)
continue;
printf("%s (%d)", avd->name, (int)fmt);
int mpfmt = pixfmt2imgfmt(fmt);
bool generic = mpfmt >= IMGFMT_AVPIXFMT_START &&
mpfmt < IMGFMT_AVPIXFMT_END;
printf(" mp=%d%s\n ", mpfmt, generic ? " [GENERIC]" : "");
struct mp_imgfmt_desc d = mp_imgfmt_get_desc(mpfmt);
if (d.id)
assert(d.avformat == fmt);
#define FLAG(t, c) if (d.flags & (t)) printf("[%s]", c);
FLAG(MP_IMGFLAG_BYTE_ALIGNED, "BA")
FLAG(MP_IMGFLAG_ALPHA, "a")
FLAG(MP_IMGFLAG_YUV_P, "YUVP")
FLAG(MP_IMGFLAG_YUV_NV, "NV")
FLAG(MP_IMGFLAG_YUV, "yuv")
FLAG(MP_IMGFLAG_RGB, "rgb")
FLAG(MP_IMGFLAG_LE, "le")
FLAG(MP_IMGFLAG_BE, "be")
FLAG(MP_IMGFLAG_PAL, "pal")
FLAG(MP_IMGFLAG_HWACCEL, "hw")
int fcsp = mp_imgfmt_get_forced_csp(mpfmt);
if (fcsp)
printf(" fcsp=%d", fcsp);
printf(" ctype=%d", mp_imgfmt_get_component_type(mpfmt));
printf("\n");
printf(" planes=%d, chroma=%d:%d align=%d:%d bits=%d cbits=%d\n",
d.num_planes, d.chroma_xs, d.chroma_ys, d.align_x, d.align_y,
d.plane_bits, d.component_bits);
printf(" {");
for (int n = 0; n < MP_MAX_PLANES; n++)
printf("%d/%d/[%d:%d] ", d.bytes[n], d.bpp[n], d.xs[n], d.ys[n]);
printf("}\n");
if (mpfmt && !(d.flags & MP_IMGFLAG_HWACCEL) && fmt != AV_PIX_FMT_UYYVYY411)
{
AVFrame *fr = av_frame_alloc();
fr->format = fmt;
fr->width = 128;
fr->height = 128;
int err = av_frame_get_buffer(fr, MP_IMAGE_BYTE_ALIGN);
assert(err >= 0);
struct mp_image *mpi = mp_image_alloc(mpfmt, fr->width, fr->height);
assert(mpi);
// A rather fuzzy test, which might fail even if there's no bug.
for (int n = 0; n < 4; n++) {
if (!!mpi->planes[n] != !!fr->data[n]) {
printf(" Warning: p%d: %p %p\n", n,
mpi->planes[n], fr->data[n]);
}
if (mpi->stride[n] != fr->linesize[n]) {
printf(" Warning: p%d: %d %d\n", n,
mpi->stride[n], fr->linesize[n]);
}
}
talloc_free(mpi);
av_frame_free(&fr);
}
struct mp_regular_imgfmt reg;
if (mp_get_regular_imgfmt(&reg, mpfmt)) {
const char *type = "unknown";
switch (reg.component_type) {
case MP_COMPONENT_TYPE_UINT: type = "uint"; break;
case MP_COMPONENT_TYPE_FLOAT: type = "float"; break;
}
printf(" Regular: %d planes, %d bytes per comp., %d bit-pad, "
"%dx%d chroma, type=%s\n",
reg.num_planes, reg.component_size, reg.component_pad,
reg.chroma_w, reg.chroma_h, type);
for (int n = 0; n < reg.num_planes; n++) {
struct mp_regular_imgfmt_plane *plane = &reg.planes[n];
printf(" %d: {", n);
for (int i = 0; i < plane->num_components; i++) {
if (i > 0)
printf(", ");
printf("%d", plane->components[i]);
}
printf("}\n");
}
}
}
}
#endif
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