On Thu, May 16, 2019 at 12:54 PM Andriy Gelman <andriy.gel...@gmail.com>
wrote:
> Hi Jun,
>
> On Thu, 16. May 00:12, Jun Li wrote:
> > Fix #6945
> > Current implementaion for autorotate works fine for stream
> > level rotataion but no support for frame level operation
> > and frame flip. This patch is for adding flip support and
> > per frame operations.
> > ---
> > fftools/cmdutils.c | 9 ++---
> > fftools/cmdutils.h | 2 +-
> > fftools/ffmpeg.c | 21 ++++++++++-
> > fftools/ffmpeg.h | 2 +
> > fftools/ffmpeg_filter.c | 81 ++++++++++++++++++++++++++++++++++++++---
> > fftools/ffplay.c | 28 +++++++++++---
> > 6 files changed, 126 insertions(+), 17 deletions(-)
> >
> > diff --git a/fftools/cmdutils.c b/fftools/cmdutils.c
> > index 9cfbc45c2b..b8bb904419 100644
> > --- a/fftools/cmdutils.c
> > +++ b/fftools/cmdutils.c
> > @@ -2172,13 +2172,12 @@ void *grow_array(void *array, int elem_size, int
> *size, int new_size)
> > return array;
> > }
> >
> > -double get_rotation(AVStream *st)
> > +double get_rotation_hflip(int32_t display_matrix[9], int* hflip)
> > {
> > - uint8_t* displaymatrix = av_stream_get_side_data(st,
> > -
> AV_PKT_DATA_DISPLAYMATRIX, NULL);
> > double theta = 0;
> > - if (displaymatrix)
> > - theta = -av_display_rotation_get((int32_t*) displaymatrix);
> > +
> > + if (display_matrix)
> > + theta = -av_display_rotation_hflip_get(display_matrix, hflip);
> >
> > theta -= 360*floor(theta/360 + 0.9/360);
> >
> > diff --git a/fftools/cmdutils.h b/fftools/cmdutils.h
> > index 6e2e0a2acb..dce44ed6e1 100644
> > --- a/fftools/cmdutils.h
> > +++ b/fftools/cmdutils.h
> > @@ -643,6 +643,6 @@ void *grow_array(void *array, int elem_size, int
> *size, int new_size);
> > char name[128];\
> > av_get_channel_layout_string(name, sizeof(name), 0, ch_layout);
> >
> > -double get_rotation(AVStream *st);
> > +double get_rotation_hflip(int32_t display_matrix[9], int* hflip);
> >
> > #endif /* FFTOOLS_CMDUTILS_H */
> > diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
> > index 01f04103cf..9ea1aaa930 100644
> > --- a/fftools/ffmpeg.c
> > +++ b/fftools/ffmpeg.c
> > @@ -2126,6 +2126,24 @@ static int
> ifilter_has_all_input_formats(FilterGraph *fg)
> > return 1;
> > }
> >
> > +static int ifilter_display_matrix_need_from_frame(InputFilter *ifilter,
> AVFrame* frame)
> > +{
> > + int32_t* stream_matrix =
> (int32_t*)av_stream_get_side_data(ifilter->ist->st,
> > +
> AV_PKT_DATA_DISPLAYMATRIX, NULL);
> > + // if we already have display matrix from stream, use it instead of
> extracting
> > + // from frame.
> > + if (stream_matrix) {
> > + memcpy(ifilter->display_matrix, stream_matrix, 4 * 9);
> > + return 0;
> > + }
> > +
> > + // cleanup the display matrix, may be from last frame
> > + memset(ifilter->display_matrix, 0, 4 * 9);
> > + av_display_rotation_set(ifilter->display_matrix, 0);
> > +
> > + return !!av_dict_get(frame->metadata, "Orientation", NULL, 0);
> > +}
> > +
> > static int ifilter_send_frame(InputFilter *ifilter, AVFrame *frame)
> > {
> > FilterGraph *fg = ifilter->graph;
> > @@ -2141,7 +2159,8 @@ static int ifilter_send_frame(InputFilter
> *ifilter, AVFrame *frame)
> > ifilter->channel_layout != frame->channel_layout;
> > break;
> > case AVMEDIA_TYPE_VIDEO:
> > - need_reinit |= ifilter->width != frame->width ||
> > + need_reinit |= ifilter_display_matrix_need_from_frame(ifilter,
> frame) ||
> > + ifilter->width != frame->width ||
> > ifilter->height != frame->height;
> > break;
> > }
> > diff --git a/fftools/ffmpeg.h b/fftools/ffmpeg.h
> > index eb1eaf6363..8331720663 100644
> > --- a/fftools/ffmpeg.h
> > +++ b/fftools/ffmpeg.h
> > @@ -251,6 +251,8 @@ typedef struct InputFilter {
> > int channels;
> > uint64_t channel_layout;
> >
> > + int32_t display_matrix[9];
> > +
> > AVBufferRef *hw_frames_ctx;
> >
> > int eof;
> > diff --git a/fftools/ffmpeg_filter.c b/fftools/ffmpeg_filter.c
> > index 72838de1e2..1894f30561 100644
> > --- a/fftools/ffmpeg_filter.c
> > +++ b/fftools/ffmpeg_filter.c
> > @@ -328,6 +328,7 @@ static void init_input_filter(FilterGraph *fg,
> AVFilterInOut *in)
> > fg->inputs[fg->nb_inputs - 1]->format = -1;
> > fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
> > fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in,
> 1);
> > + av_display_rotation_set(fg->inputs[fg->nb_inputs -
> 1]->display_matrix, 0);
> >
> > fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 *
> sizeof(AVFrame*));
> > if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
> > @@ -807,22 +808,43 @@ static int
> configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
> > last_filter = ifilter->filter;
> >
> > if (ist->autorotate) {
> > - double theta = get_rotation(ist->st);
> > + int hflip = 0;
> > + double theta = get_rotation_hflip(ifilter->display_matrix,
> &hflip);
> >
> > - if (fabs(theta - 90) < 1.0) {
> > + if (fabs(theta) < 1.0) {
> > + if (hflip)
> > + ret = insert_filter(&last_filter, &pad_idx, "hflip",
> NULL);
> > + } else if (fabs(theta - 90) < 1.0) {
> > ret = insert_filter(&last_filter, &pad_idx, "transpose",
> "clock");
> > - } else if (fabs(theta - 180) < 1.0) {
> > - ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
> > if (ret < 0)
> > return ret;
> > - ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
> > + if (hflip)
> > + ret = insert_filter(&last_filter, &pad_idx, "hflip",
> NULL);
> > + } else if (fabs(theta - 180) < 1.0) {
> > + if (hflip) { // rotate 180 and hflip equals vflip
> > + ret = insert_filter(&last_filter, &pad_idx, "vflip",
> NULL);
> > + } else {
> > + ret = insert_filter(&last_filter, &pad_idx, "hflip",
> NULL);
> > + if (ret < 0)
> > + return ret;
> > + ret = insert_filter(&last_filter, &pad_idx, "vflip",
> NULL);
> > + }
> > } else if (fabs(theta - 270) < 1.0) {
> > ret = insert_filter(&last_filter, &pad_idx, "transpose",
> "cclock");
> > + if (ret < 0)
> > + return ret;
> > + if (hflip)
> > + ret = insert_filter(&last_filter, &pad_idx, "hflip",
> NULL);
> > } else if (fabs(theta) > 1.0) {
> > char rotate_buf[64];
> > snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180",
> theta);
> > ret = insert_filter(&last_filter, &pad_idx, "rotate",
> rotate_buf);
> > + if (ret < 0)
> > + return ret;
> > + if (hflip)
> > + ret = insert_filter(&last_filter, &pad_idx, "hflip",
> NULL);
> > }
>
> Just a thought, if you model your transformation matrix as M = RH, where H
> is
> the horizontal flip and R is the rotation, is it possible to simplify the
> logic
> here to:
>
> //your H transformation
> if (hflip)
> ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
>
> //the R transformation
> same code as before..
>
Sorry Andriy, but I donot quite get it. Do you mean put this code
//your H transformation
if (hflip)
ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
outside of the if check ?
Best Regards,
Jun
Thanks,
> Andriy
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