On Sun, Jun 9, 2019 at 1:52 AM Paul B Mahol <one...@gmail.com> wrote:
> On 6/9/19, Jun Li <junli1...@gmail.com> wrote:
> > On Sun, Jun 9, 2019 at 12:49 AM Paul B Mahol <one...@gmail.com> wrote:
> >
> >> On 6/9/19, Jun Li <junli1...@gmail.com> wrote:
> >> > Add exif orientation support and expose an option.
> >> > ---
> >> > libavfilter/hflip.h | 2 +
> >> > libavfilter/transpose.h | 14 ++++
> >> > libavfilter/vf_hflip.c | 40 ++++++---
> >> > libavfilter/vf_transpose.c | 168
> ++++++++++++++++++++++++++++++++-----
> >> > 4 files changed, 192 insertions(+), 32 deletions(-)
> >> >
> >> > diff --git a/libavfilter/hflip.h b/libavfilter/hflip.h
> >> > index 204090dbb4..4e89bae3fc 100644
> >> > --- a/libavfilter/hflip.h
> >> > +++ b/libavfilter/hflip.h
> >> > @@ -35,5 +35,7 @@ typedef struct FlipContext {
> >> >
> >> > int ff_hflip_init(FlipContext *s, int step[4], int nb_planes);
> >> > void ff_hflip_init_x86(FlipContext *s, int step[4], int nb_planes);
> >> > +int ff_hflip_config_props(FlipContext* s, AVFilterLink *inlink);
> >> > +int ff_hflip_filter_slice(FlipContext *s, AVFrame *in, AVFrame *out,
> >> > int
> >> > job, int nb_jobs, int vlifp);
> >> >
> >> > #endif /* AVFILTER_HFLIP_H */
> >> > diff --git a/libavfilter/transpose.h b/libavfilter/transpose.h
> >> > index aa262b9487..5da08bddc0 100644
> >> > --- a/libavfilter/transpose.h
> >> > +++ b/libavfilter/transpose.h
> >> > @@ -34,4 +34,18 @@ enum TransposeDir {
> >> > TRANSPOSE_VFLIP,
> >> > };
> >> >
> >> > +enum OrientationType {
> >> > + ORIENTATION_AUTO_TRANSPOSE = -2,
> >> > + ORIENTATION_AUTO_FLIP = -1,
> >> > + ORIENTATION_NONE = 0,
> >> > + ORIENTATION_NORMAL,
> >> > + ORIENTATION_HFLIP,
> >> > + ORIENTATION_ROTATE180,
> >> > + ORIENTATION_VFLIP,
> >> > + ORIENTATION_HFLIP_ROTATE270CW,
> >> > + ORIENTATION_ROTATE90CW,
> >> > + ORIENTATION_HFLIP_ROTATE90CW,
> >> > + ORIENTATION_ROTATE270CW
> >> > +};
> >> > +
> >> > #endif
> >> > diff --git a/libavfilter/vf_hflip.c b/libavfilter/vf_hflip.c
> >> > index b77afc77fc..d24ca5c2e7 100644
> >> > --- a/libavfilter/vf_hflip.c
> >> > +++ b/libavfilter/vf_hflip.c
> >> > @@ -125,9 +125,8 @@ static void hflip_qword_c(const uint8_t *ssrc,
> >> uint8_t
> >> > *ddst, int w)
> >> > dst[j] = src[-j];
> >> > }
> >> >
> >> > -static int config_props(AVFilterLink *inlink)
> >> > +int ff_hflip_config_props(FlipContext* s, AVFilterLink *inlink)
> >> > {
> >> > - FlipContext *s = inlink->dst->priv;
> >> > const AVPixFmtDescriptor *pix_desc =
> >> > av_pix_fmt_desc_get(inlink->format);
> >> > const int hsub = pix_desc->log2_chroma_w;
> >> > const int vsub = pix_desc->log2_chroma_h;
> >> > @@ -144,6 +143,12 @@ static int config_props(AVFilterLink *inlink)
> >> > return ff_hflip_init(s, s->max_step, nb_planes);
> >> > }
> >> >
> >> > +static int config_props(AVFilterLink *inlink)
> >> > +{
> >> > + FlipContext *s = inlink->dst->priv;
> >> > + return ff_hflip_config_props(s, inlink);
> >> > +}
> >> > +
> >> > int ff_hflip_init(FlipContext *s, int step[4], int nb_planes)
> >> > {
> >> > int i;
> >> > @@ -170,14 +175,10 @@ typedef struct ThreadData {
> >> > AVFrame *in, *out;
> >> > } ThreadData;
> >> >
> >> > -static int filter_slice(AVFilterContext *ctx, void *arg, int job, int
> >> > nb_jobs)
> >> > +int ff_hflip_filter_slice(FlipContext *s, AVFrame *in, AVFrame *out,
> >> > int
> >> > job, int nb_jobs, int vflip)
> >> > {
> >> > - FlipContext *s = ctx->priv;
> >> > - ThreadData *td = arg;
> >> > - AVFrame *in = td->in;
> >> > - AVFrame *out = td->out;
> >> > uint8_t *inrow, *outrow;
> >> > - int i, plane, step;
> >> > + int i, plane, step, outlinesize;
> >> >
> >> > for (plane = 0; plane < 4 && in->data[plane] &&
> >> > in->linesize[plane];
> >> > plane++) {
> >> > const int width = s->planewidth[plane];
> >> > @@ -187,19 +188,36 @@ static int filter_slice(AVFilterContext *ctx,
> void
> >> > *arg, int job, int nb_jobs)
> >> >
> >> > step = s->max_step[plane];
> >> >
> >> > - outrow = out->data[plane] + start * out->linesize[plane];
> >> > - inrow = in ->data[plane] + start * in->linesize[plane] +
> >> (width -
> >> > 1) * step;
> >> > + if (vflip) {
> >> > + outrow = out->data[plane] + (height - start - 1)*
> >> > out->linesize[plane];
> >> > + outlinesize = -out->linesize[plane];
> >> > + } else {
> >> > + outrow = out->data[plane] + start * out->linesize[plane];
> >> > + outlinesize = out->linesize[plane];
> >> > + }
> >> > +
> >> > + inrow = in->data[plane] + start * in->linesize[plane] +
> (width
> >> -
> >> > 1) * step;
> >> > +
> >> > for (i = start; i < end; i++) {
> >> > s->flip_line[plane](inrow, outrow, width);
> >> >
> >> > inrow += in ->linesize[plane];
> >> > - outrow += out->linesize[plane];
> >> > + outrow += outlinesize;
> >> > }
> >> > }
> >> >
> >> > return 0;
> >> > }
> >> >
> >> > +static int filter_slice(AVFilterContext *ctx, void *arg, int job, int
> >> > nb_jobs)
> >> > +{
> >> > + FlipContext *s = ctx->priv;
> >> > + ThreadData *td = arg;
> >> > + AVFrame *in = td->in;
> >> > + AVFrame *out = td->out;
> >> > + return ff_hflip_filter_slice(s, in, out, job, nb_jobs, 0);
> >> > +}
> >> > +
> >> > static int filter_frame(AVFilterLink *inlink, AVFrame *in)
> >> > {
> >> > AVFilterContext *ctx = inlink->dst;
> >> > diff --git a/libavfilter/vf_transpose.c b/libavfilter/vf_transpose.c
> >> > index dd54947bd9..7a122ba8a9 100644
> >> > --- a/libavfilter/vf_transpose.c
> >> > +++ b/libavfilter/vf_transpose.c
> >> > @@ -39,6 +39,7 @@
> >> > #include "internal.h"
> >> > #include "video.h"
> >> > #include "transpose.h"
> >> > +#include "hflip.h"
> >> >
> >> > typedef struct TransVtable {
> >> > void (*transpose_8x8)(uint8_t *src, ptrdiff_t src_linesize,
> >> > @@ -48,16 +49,22 @@ typedef struct TransVtable {
> >> > int w, int h);
> >> > } TransVtable;
> >> >
> >> > -typedef struct TransContext {
> >> > - const AVClass *class;
> >> > +typedef struct TransContextData {
> >> > int hsub, vsub;
> >> > int planes;
> >> > int pixsteps[4];
> >> > + TransVtable vtables[4];
> >> > +} TransContextData;
> >> >
> >> > +typedef struct TransContext {
> >> > + const AVClass *class;
> >> > int passthrough; ///< PassthroughType, landscape passthrough
> >> > mode
> >> > enabled
> >> > int dir; ///< TransposeDir
> >> > -
> >> > - TransVtable vtables[4];
> >> > + int orientation; ///< OrientationType
> >> > + union {
> >> > + TransContextData transpose;
> >> > + FlipContext flip;
> >> > + } ctx;
> >> > } TransContext;
> >> >
> >> > static int query_formats(AVFilterContext *ctx)
> >> > @@ -207,14 +214,18 @@ static int config_props_output(AVFilterLink
> >> *outlink)
> >> > s->passthrough = TRANSPOSE_PT_TYPE_NONE;
> >> > }
> >> >
> >> > - s->hsub = desc_in->log2_chroma_w;
> >> > - s->vsub = desc_in->log2_chroma_h;
> >> > - s->planes = av_pix_fmt_count_planes(outlink->format);
> >> > + if (s->orientation == ORIENTATION_AUTO_FLIP ||
> >> > + (s->orientation > ORIENTATION_NONE && s->orientation <=
> >> > ORIENTATION_VFLIP))
> >> > + return ff_hflip_config_props(&(s->ctx.flip), inlink);
> >> > +
> >> > + s->ctx.transpose.hsub = desc_in->log2_chroma_w;
> >> > + s->ctx.transpose.vsub = desc_in->log2_chroma_h;
> >> > + s->ctx.transpose.planes =
> av_pix_fmt_count_planes(outlink->format);
> >> >
> >> > av_assert0(desc_in->nb_components == desc_out->nb_components);
> >> >
> >> >
> >> > - av_image_fill_max_pixsteps(s->pixsteps, NULL, desc_out);
> >> > + av_image_fill_max_pixsteps(s->ctx.transpose.pixsteps, NULL,
> >> desc_out);
> >> >
> >> > outlink->w = inlink->h;
> >> > outlink->h = inlink->w;
> >> > @@ -226,10 +237,10 @@ static int config_props_output(AVFilterLink
> >> *outlink)
> >> > outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
> >> >
> >> > for (int i = 0; i < 4; i++) {
> >> > - TransVtable *v = &s->vtables[i];
> >> > - switch (s->pixsteps[i]) {
> >> > + TransVtable *v = &s->ctx.transpose.vtables[i];
> >> > + switch (s->ctx.transpose.pixsteps[i]) {
> >> > case 1: v->transpose_block = transpose_block_8_c;
> >> > - v->transpose_8x8 = transpose_8x8_8_c; break;
> >> > + v->transpose_8x8 = transpose_8x8_8_c; break;
> >> > case 2: v->transpose_block = transpose_block_16_c;
> >> > v->transpose_8x8 = transpose_8x8_16_c; break;
> >> > case 3: v->transpose_block = transpose_block_24_c;
> >> > @@ -262,21 +273,69 @@ static AVFrame *get_video_buffer(AVFilterLink
> >> *inlink,
> >> > int w, int h)
> >> >
> >> > typedef struct ThreadData {
> >> > AVFrame *in, *out;
> >> > + int orientation;
> >> > } ThreadData;
> >> >
> >> > -static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr,
> >> > - int nb_jobs)
> >> > +static int get_frame_orientation(AVFilterContext *ctx, const AVFrame
> >> > *frame)
> >> > +{
> >> > + TransContext *s = ctx->priv;
> >> > + AVDictionaryEntry *entry = NULL;
> >> > + int orientation = ORIENTATION_NONE;
> >> > +
> >> > + if (s->orientation >= ORIENTATION_NONE)
> >> > + return s->orientation;
> >> > +
> >> > + // read exif orientation data
> >> > + entry = av_dict_get(frame->metadata, "Orientation", NULL, 0);
> >> > + if (entry && entry->value)
> >> > + orientation = atoi(entry->value);
> >> > +
> >> > + // check frame orientation validity
> >> > + if (orientation < ORIENTATION_NORMAL ||
> >> > + orientation > ORIENTATION_ROTATE270CW) {
> >> > + // frame orientation is invalid or empty, we have to guess
> one.
> >> > + av_log(ctx, AV_LOG_WARNING, "Frame orientation is either
> empty
> >> or
> >> > invalid.\n");
> >> > + return s->orientation == ORIENTATION_AUTO_FLIP ?
> >> > + ORIENTATION_NORMAL : ORIENTATION_HFLIP_ROTATE270CW;
> >> > + }
> >> > +
> >> > + // check conflict between frame orientation and passed-in
> >> orientation
> >> > option
> >> > + if (s->orientation == ORIENTATION_AUTO_FLIP &&
> >> > + orientation > ORIENTATION_VFLIP) {
> >> > + av_log(ctx, AV_LOG_WARNING,
> >> > + "Found valid orientation value: %i, but auto-flip only
> >> cover
> >> > range [1, 4]. Set to default value 1(ORIENTATION_NONE).\n",
> >> > + orientation);
> >> > + // conflict happens, return the min value of orientation
> range
> >> > + return ORIENTATION_NORMAL;
> >> > + }
> >> > +
> >> > + // check conflict between frame orientation and passed-in
> >> orientation
> >> > option
> >> > + if (s->orientation == ORIENTATION_AUTO_TRANSPOSE &&
> >> > + orientation <= ORIENTATION_VFLIP) {
> >> > + av_log(ctx, AV_LOG_WARNING,
> >> > + "Found valid orientation value: %i, but auto-transpose
> >> only
> >> > cover range [5, 8]. Set to default value
> >> > 5(ORIENTATION_HFLIP_ROTATE270CW).\n",
> >> > + orientation);
> >> > + // conflict happens, return the min value of orientation
> range,
> >> > same effect as dir=0
> >> > + return ORIENTATION_HFLIP_ROTATE270CW;
> >> > + }
> >> > +
> >> > + return orientation;
> >> > +}
> >> > +
> >> > +static int transpose_filter_slice(AVFilterContext *ctx, void *arg,
> int
> >> > jobnr, int nb_jobs)
> >> > {
> >> > TransContext *s = ctx->priv;
> >> > ThreadData *td = arg;
> >> > AVFrame *out = td->out;
> >> > AVFrame *in = td->in;
> >> > + TransContextData *c = &(s->ctx.transpose);
> >> > + int orientation = td->orientation;
> >> > int plane;
> >> >
> >> > - for (plane = 0; plane < s->planes; plane++) {
> >> > - int hsub = plane == 1 || plane == 2 ? s->hsub : 0;
> >> > - int vsub = plane == 1 || plane == 2 ? s->vsub : 0;
> >> > - int pixstep = s->pixsteps[plane];
> >> > + for (plane = 0; plane < c->planes; plane++) {
> >> > + int hsub = plane == 1 || plane == 2 ? c->hsub : 0;
> >> > + int vsub = plane == 1 || plane == 2 ? c->vsub : 0;
> >> > + int pixstep = c->pixsteps[plane];
> >> > int inh = AV_CEIL_RSHIFT(in->height, vsub);
> >> > int outw = AV_CEIL_RSHIFT(out->width, hsub);
> >> > int outh = AV_CEIL_RSHIFT(out->height, vsub);
> >> > @@ -285,19 +344,36 @@ static int filter_slice(AVFilterContext *ctx,
> void
> >> > *arg, int jobnr,
> >> > uint8_t *dst, *src;
> >> > int dstlinesize, srclinesize;
> >> > int x, y;
> >> > - TransVtable *v = &s->vtables[plane];
> >> > + int dir = s->dir;
> >> > + TransVtable *v = &c->vtables[plane];
> >> >
> >> > dstlinesize = out->linesize[plane];
> >> > dst = out->data[plane] + start * dstlinesize;
> >> > src = in->data[plane];
> >> > srclinesize = in->linesize[plane];
> >> > + switch (orientation) {
> >> > + case ORIENTATION_HFLIP_ROTATE270CW:
> >> > + dir = 0; // mirror horizontal and rotate 270 CW, same
> >> > as
> >> > dir=cclock_flip
> >> > + break;
> >> > + case ORIENTATION_ROTATE90CW:
> >> > + dir = 1; // rotate 90 CW, same as dir=clock
> >> > + break;
> >> > + case ORIENTATION_HFLIP_ROTATE90CW:
> >> > + dir = 3; // mirror horizontal and rotate 90 CW, same
> as
> >> > dir=clock_flip
> >> > + break;
> >> > + case ORIENTATION_ROTATE270CW:
> >> > + dir = 2; // rotate 270 CW, same as dir=cclock
> >> > + break;
> >> > + default:
> >> > + break;
> >> > + }
> >> >
> >> > - if (s->dir & 1) {
> >> > + if (dir & 1) {
> >> > src += in->linesize[plane] * (inh - 1);
> >> > srclinesize *= -1;
> >> > }
> >> >
> >> > - if (s->dir & 2) {
> >> > + if (dir & 2) {
> >> > dst = out->data[plane] + dstlinesize * (outh -
> >> start -
> >> > 1);
> >> > dstlinesize *= -1;
> >> > }
> >> > @@ -326,6 +402,22 @@ static int filter_slice(AVFilterContext *ctx,
> void
> >> > *arg, int jobnr,
> >> > return 0;
> >> > }
> >> >
> >> > +static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr,
> >> > + int nb_jobs)
> >> > +{
> >> > + TransContext *s = ctx->priv;
> >> > + ThreadData *td = arg;
> >> > + AVFrame *out = td->out;
> >> > + AVFrame *in = td->in;
> >> > + int orientation = td->orientation;
> >> > +
> >> > + if (orientation > ORIENTATION_NONE && orientation <=
> >> ORIENTATION_VFLIP)
> >> > {
> >> > + return ff_hflip_filter_slice(&s->ctx.flip, in, out, jobnr,
> >> nb_jobs,
> >> > + orientation ==
> >> ORIENTATION_ROTATE180);
> >> > + }
> >> > + return transpose_filter_slice(ctx, arg, jobnr, nb_jobs);
> >> > +}
> >> > +
> >> > static int filter_frame(AVFilterLink *inlink, AVFrame *in)
> >> > {
> >> > AVFilterContext *ctx = inlink->dst;
> >> > @@ -333,10 +425,29 @@ static int filter_frame(AVFilterLink *inlink,
> >> AVFrame
> >> > *in)
> >> > AVFilterLink *outlink = ctx->outputs[0];
> >> > ThreadData td;
> >> > AVFrame *out;
> >> > + int orientation = ORIENTATION_NONE;
> >> >
> >> > if (s->passthrough)
> >> > return ff_filter_frame(outlink, in);
> >> >
> >> > + if (s->orientation) {
> >> > + orientation = get_frame_orientation(ctx, in);
> >> > + if (orientation == ORIENTATION_NORMAL) // orientation
> 'Normal',
> >> do
> >> > nothing
> >> > + return ff_filter_frame(outlink, in);
> >> > +
> >> > + if (orientation == ORIENTATION_VFLIP) {
> >> > + int i;
> >> > + for (i = 0; i < 4; i ++) {
> >> > + int height = s->ctx.flip.planeheight[i];
> >> > + if (in->data[i]) {
> >> > + in->data[i] += (height - 1) * in->linesize[i];
> >> > + in->linesize[i] = -in->linesize[i];
> >> > + }
> >> > + }
> >> > + return ff_filter_frame(outlink, in);
> >> > + }
> >> > + }
> >> > +
> >> > out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
> >> > if (!out) {
> >> > av_frame_free(&in);
> >> > @@ -346,12 +457,14 @@ static int filter_frame(AVFilterLink *inlink,
> >> AVFrame
> >> > *in)
> >> >
> >> > if (in->sample_aspect_ratio.num == 0) {
> >> > out->sample_aspect_ratio = in->sample_aspect_ratio;
> >> > - } else {
> >> > + } else if (s->orientation == ORIENTATION_AUTO_TRANSPOSE ||
> >> > + orientation > ORIENTATION_VFLIP) { // transpose
> >> > out->sample_aspect_ratio.num = in->sample_aspect_ratio.den;
> >> > out->sample_aspect_ratio.den = in->sample_aspect_ratio.num;
> >> > }
> >> >
> >> > td.in = in, td.out = out;
> >> > + td.orientation = orientation;
> >> > ctx->internal->execute(ctx, filter_slice, &td, NULL,
> >> FFMIN(outlink->h,
> >> > ff_filter_get_nb_threads(ctx)));
> >> > av_frame_free(&in);
> >> > return ff_filter_frame(outlink, out);
> >> > @@ -373,6 +486,19 @@ static const AVOption transpose_options[] = {
> >> > { "portrait", "preserve portrait geometry", 0,
> >> > AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_PORTRAIT}, INT_MIN,
> INT_MAX,
> >> > FLAGS, "passthrough" },
> >> > { "landscape", "preserve landscape geometry", 0,
> >> > AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_LANDSCAPE}, INT_MIN,
> INT_MAX,
> >> > FLAGS, "passthrough" },
> >> >
> >> > + { "orientation", "apply frame exif orientation",
> >> > + OFFSET(orientation), AV_OPT_TYPE_INT, {.i64 = ORIENTATION_NONE
> },
> >> > -2, 8, FLAGS, "orientation" },
> >>
> >> -2 and 8 are still hardcoded here.
> >
> >
> > Hi Paul,
> > I actually explained this in path version 6 and thought it was fine since
> > no objection.
> > "I updated the default value type to enum. But I still keep the value
> range
> > -2 and 8 as numeric here since I see other options are doing that. Hope
> it
> > is fine."
> > I see other options in the same file like "dir" is doing that, maybe
> > consistent with them ? what do you think ?
>
> Unacceptable explanation. The code is wrong. Making it consistent with
> wrong code will not make it better.
New version is sent out for addressing it.
https://patchwork.ffmpeg.org/patch/13478/
Thanks.
Best Regards,
Jun
>
>
>
> > Best Regards,
> > Jun
> >
> >
> >>
> >> + { "auto_transpose", "apply transposition if frame's
> >> orientation
> >> > value is in range [5,8]", 0, AV_OPT_TYPE_CONST,
> >> > {.i64=ORIENTATION_AUTO_TRANSPOSE}, INT_MIN, INT_MAX, FLAGS,
> >> "orientation"
> >> > },
> >> > + { "auto_flip", "apply flip if frame's orientation
> value
> >> is
> >> > in range [1,4]", 0, AV_OPT_TYPE_CONST,
> >> > {.i64=ORIENTATION_AUTO_FLIP}, INT_MIN, INT_MAX, FLAGS,
> >> "orientation"
> >> > },
> >> > + { "none", "apply default transposition, same as
> >> > dir=cclock_flip", 0,
> >> > AV_OPT_TYPE_CONST,
> >> > {.i64=ORIENTATION_NONE}, INT_MIN, INT_MAX, FLAGS,
> >> "orientation"
> >> > },
> >> > + { "normal", "exif orientation 'Normal', do not
> apply
> >> any
> >> > flip or transposition", 0, AV_OPT_TYPE_CONST,
> >> > {.i64=ORIENTATION_NORMAL}, INT_MIN, INT_MAX, FLAGS,
> >> "orientation"
> >> > },
> >> > + { "hflip", "exif orientation 'Mirror horizontal',
> >> apply
> >> > horizontal flip", 0, AV_OPT_TYPE_CONST,
> >> > {.i64=ORIENTATION_HFLIP}, INT_MIN, INT_MAX, FLAGS,
> >> "orientation"
> >> > },
> >> > + { "rotate180", "exif orientation 'Rotate 180', apply
> >> > rotation 180", 0,
> >> > AV_OPT_TYPE_CONST,
> >> > {.i64=ORIENTATION_ROTATE180}, INT_MIN, INT_MAX, FLAGS,
> >> "orientation"
> >> > },
> >> > + { "vflip", "exif orientation 'Mirror vertical',
> >> apply
> >> > vertical flip", 0, AV_OPT_TYPE_CONST,
> >> > {.i64=ORIENTATION_VFLIP}, INT_MIN, INT_MAX, FLAGS,
> >> "orientation"
> >> > },
> >> > + { "hflip_rotate270cw", "exif orientation 'Mirror horizontal
> and
> >> > rotate 270 CW', same effect as dir=cclock_flip", 0, AV_OPT_TYPE_CONST,
> >> > {.i64=ORIENTATION_HFLIP_ROTATE270CW}, INT_MIN, INT_MAX, FLAGS,
> >> "orientation"
> >> > },
> >> > + { "rotate90cw", "exif orientation 'Rotate 90 CW', same
> >> > as
> >> > dir=clock", 0, AV_OPT_TYPE_CONST,
> >> > {.i64=ORIENTATION_ROTATE90CW}, INT_MIN, INT_MAX, FLAGS,
> >> "orientation"
> >> > },
> >> > + { "hflip_rotate90cw", "exif orientation 'Mirror horizontal
> and
> >> > rotate 90 CW', same effect as dir=clock_flip", 0, AV_OPT_TYPE_CONST,
> >> > {.i64=ORIENTATION_HFLIP_ROTATE90CW}, INT_MIN, INT_MAX, FLAGS,
> >> "orientation"
> >> > },
> >> > + { "rotate270", "exif orientation 'Rotate 270 CW',
> same
> >> as
> >> > dir=cclock", 0, AV_OPT_TYPE_CONST,
> >> > {.i64=ORIENTATION_ROTATE270CW}, INT_MIN, INT_MAX, FLAGS,
> >> "orientation"
> >> > },
> >> > { NULL }
> >> > };
> >> >
> >> > --
> >> > 2.17.1
> >> >
> >> > _______________________________________________
> >> > ffmpeg-devel mailing list
> >> > ffmpeg-devel@ffmpeg.org
> >> > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
> >> >
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