[FFmpeg-devel,v4,1/2] fftools/ffmpeg_filter, ffplay: Add flip support to rotation

Submitted by Jun Li on May 8, 2019, 6:24 a.m.

Details

Message ID 20190508062408.32558-1-junli1026@gmail.com
State New
Headers show

Commit Message

Jun Li May 8, 2019, 6:24 a.m.
Current implemantion for autoratation does not support flip.
That is, if the matrix contains flip info, the API get_rotation
only reflects partial information. This change is for adding
support for hflip (vflip can be achieved by rotation+hflip).
---
 fftools/cmdutils.c        |  4 ++--
 fftools/cmdutils.h        |  2 +-
 fftools/ffmpeg_filter.c   | 31 ++++++++++++++++++++++++++-----
 fftools/ffplay.c          | 22 ++++++++++++++++++----
 libavutil/display.c       | 14 ++++++++++++++
 libavutil/display.h       | 14 ++++++++++++++
 libavutil/tests/display.c |  8 ++++++++
 tests/ref/fate/display    |  4 ++++
 8 files changed, 87 insertions(+), 12 deletions(-)

Comments

Jun Li May 8, 2019, 6:39 a.m.
On Tue, May 7, 2019 at 11:24 PM Jun Li <junli1026@gmail.com> wrote:

> Current implemantion for autoratation does not support flip.
> That is, if the matrix contains flip info, the API get_rotation
> only reflects partial information. This change is for adding
> support for hflip (vflip can be achieved by rotation+hflip).
> ---
>  fftools/cmdutils.c        |  4 ++--
>  fftools/cmdutils.h        |  2 +-
>  fftools/ffmpeg_filter.c   | 31 ++++++++++++++++++++++++++-----
>  fftools/ffplay.c          | 22 ++++++++++++++++++----
>  libavutil/display.c       | 14 ++++++++++++++
>  libavutil/display.h       | 14 ++++++++++++++
>  libavutil/tests/display.c |  8 ++++++++
>  tests/ref/fate/display    |  4 ++++
>  8 files changed, 87 insertions(+), 12 deletions(-)
>
> diff --git a/fftools/cmdutils.c b/fftools/cmdutils.c
> index 9cfbc45c2b..1235a3dd7b 100644
> --- a/fftools/cmdutils.c
> +++ b/fftools/cmdutils.c
> @@ -2172,13 +2172,13 @@ void *grow_array(void *array, int elem_size, int
> *size, int new_size)
>      return array;
>  }
>
> -double get_rotation(AVStream *st)
> +double get_rotation_hflip(AVStream *st, 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);
> +        theta = -av_display_rotation_hflip_get((int32_t*) displaymatrix,
> hflip);
>
>      theta -= 360*floor(theta/360 + 0.9/360);
>
> diff --git a/fftools/cmdutils.h b/fftools/cmdutils.h
> index 6e2e0a2acb..0349d1bea7 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(AVStream *st, int* hflip);
>
>  #endif /* FFTOOLS_CMDUTILS_H */
> diff --git a/fftools/ffmpeg_filter.c b/fftools/ffmpeg_filter.c
> index 72838de1e2..b000958015 100644
> --- a/fftools/ffmpeg_filter.c
> +++ b/fftools/ffmpeg_filter.c
> @@ -807,22 +807,43 @@ 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(ist->st, &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);
>          }
> +
>          if (ret < 0)
>              return ret;
>      }
> diff --git a/fftools/ffplay.c b/fftools/ffplay.c
> index 8f050e16e6..2c77612193 100644
> --- a/fftools/ffplay.c
> +++ b/fftools/ffplay.c
> @@ -1914,19 +1914,33 @@ static int configure_video_filters(AVFilterGraph
> *graph, VideoState *is, const c
>  } while (0)
>
>      if (autorotate) {
> -        double theta  = get_rotation(is->video_st);
> +        int hflip;
> +        double theta  = get_rotation_hflip(is->video_st, &hflip);
>
> -        if (fabs(theta - 90) < 1.0) {
> +        if (fabs(theta) < 1.0) {
> +            if (hflip)
> +                INSERT_FILT("hflip", NULL);
> +        } else if (fabs(theta - 90) < 1.0) {
>              INSERT_FILT("transpose", "clock");
> +            if (hflip)
> +                INSERT_FILT("hflip", NULL);
>          } else if (fabs(theta - 180) < 1.0) {
> -            INSERT_FILT("hflip", NULL);
> -            INSERT_FILT("vflip", NULL);
> +            if (hflip) { // rotate 180 and hflip equals vflip
> +                INSERT_FILT("vflip", NULL);
> +            } else {
> +                INSERT_FILT("hflip", NULL);
> +                INSERT_FILT("vflip", NULL);
> +            }
>          } else if (fabs(theta - 270) < 1.0) {
>              INSERT_FILT("transpose", "cclock");
> +            if (hflip)
> +                INSERT_FILT("hflip", NULL);
>          } else if (fabs(theta) > 1.0) {
>              char rotate_buf[64];
>              snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
>              INSERT_FILT("rotate", rotate_buf);
> +            if (hflip)
> +                INSERT_FILT("hflip", NULL);
>          }
>      }
>
> diff --git a/libavutil/display.c b/libavutil/display.c
> index a0076e067b..855de4a006 100644
> --- a/libavutil/display.c
> +++ b/libavutil/display.c
> @@ -71,3 +71,17 @@ void av_display_matrix_flip(int32_t matrix[9], int
> hflip, int vflip)
>          for (i = 0; i < 9; i++)
>              matrix[i] *= flip[i % 3];
>  }
> +
> +double av_display_rotation_hflip_get(const int32_t matrix[9], int *hflip)
> +{
> +    int32_t m[9];
> +    *hflip = 0;
> +    memcpy(m, matrix, sizeof(m));
> +
> +    if (m[0] > 0 && m[4] < 0 || m[0] < 0 && m[4] > 0 ||
> +        m[1] > 0 && m[3] > 0 || m[1] < 0 && m[3] < 0) {


Thanks Michael for the testing content. It is very useful !
The content transformation matrix is as follows,
 267674        0                   0
0                    267605        0
0                   0                    1073741824
My previous condition check is too strict and does not handle the scale
case (like the example that x scale and y are not the same).
The new version should work. The warning you mentioned in the other thread
is also fixed.
https://patchwork.ffmpeg.org/patch/13030/
https://patchwork.ffmpeg.org/patch/13029/
Looks like you have many testing content :), please let me know if you need
me to test any one.




+        *hflip = 1;
> +        av_display_matrix_flip(m, 1, 0);
> +    }
> +    return av_display_rotation_get(m);
> +}
> \ No newline at end of file
> diff --git a/libavutil/display.h b/libavutil/display.h
> index 515adad795..23d71a0bc5 100644
> --- a/libavutil/display.h
> +++ b/libavutil/display.h
> @@ -106,6 +106,20 @@ void av_display_rotation_set(int32_t matrix[9],
> double angle);
>   */
>  void av_display_matrix_flip(int32_t matrix[9], int hflip, int vflip);
>
> +/**
> + * Extract the rotation component and hflip status of the transformation
> matrix.
> + *
> + * @param matrix the transformation matrix
> + * @param hflip wille be set to 1 if the matrix need horizontal flipped
> + * @return the angle (in degrees) by which the transformation rotates the
> frame
> + *         counterclockwise. The angle will be in range [-180.0, 180.0],
> + *         or NaN if the matrix is singular.
> + *
> + * @note floating point numbers are inherently inexact, so callers are
> + *       recommended to round the return value to nearest integer before
> use.
> + */
> +double av_display_rotation_hflip_get(const int32_t matrix[9], int* hflip);
> +
>  /**
>   * @}
>   * @}
> diff --git a/libavutil/tests/display.c b/libavutil/tests/display.c
> index 893ebb5543..65a0971e7b 100644
> --- a/libavutil/tests/display.c
> +++ b/libavutil/tests/display.c
> @@ -35,6 +35,8 @@ static void print_matrix(int32_t matrix[9])
>  int main(void)
>  {
>      int32_t matrix[9];
> +    int hflip = 0;
> +    double degree;
>
>      // Set the matrix to 90 degrees
>      av_display_rotation_set(matrix, 90);
> @@ -56,6 +58,12 @@ int main(void)
>      print_matrix(matrix);
>      printf("degrees: %f\n", av_display_rotation_get(matrix));
>
> +    // flip vertical
> +    av_display_matrix_flip(matrix, 0, 1);
> +    print_matrix(matrix);
> +    degree = av_display_rotation_hflip_get(matrix, &hflip);
> +    printf("degrees: %f, hflip: %i\n", degree, hflip);
> +
>      return 0;
>
>  }
> diff --git a/tests/ref/fate/display b/tests/ref/fate/display
> index 251e7e0cdf..14b4c7db7c 100644
> --- a/tests/ref/fate/display
> +++ b/tests/ref/fate/display
> @@ -14,3 +14,7 @@ degrees: 135.000000
>  -46340 -46340 0
>  0 0 1073741824
>  degrees: -135.000000
> +-46340 -46340 0
> +-46340 46340 0
> +0 0 1073741824
> +degrees: 45.000000, hflip: 1
> --
> 2.17.1
>
>

Patch hide | download patch | download mbox

diff --git a/fftools/cmdutils.c b/fftools/cmdutils.c
index 9cfbc45c2b..1235a3dd7b 100644
--- a/fftools/cmdutils.c
+++ b/fftools/cmdutils.c
@@ -2172,13 +2172,13 @@  void *grow_array(void *array, int elem_size, int *size, int new_size)
     return array;
 }
 
-double get_rotation(AVStream *st)
+double get_rotation_hflip(AVStream *st, 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);
+        theta = -av_display_rotation_hflip_get((int32_t*) displaymatrix, hflip);
 
     theta -= 360*floor(theta/360 + 0.9/360);
 
diff --git a/fftools/cmdutils.h b/fftools/cmdutils.h
index 6e2e0a2acb..0349d1bea7 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(AVStream *st, int* hflip);
 
 #endif /* FFTOOLS_CMDUTILS_H */
diff --git a/fftools/ffmpeg_filter.c b/fftools/ffmpeg_filter.c
index 72838de1e2..b000958015 100644
--- a/fftools/ffmpeg_filter.c
+++ b/fftools/ffmpeg_filter.c
@@ -807,22 +807,43 @@  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(ist->st, &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);
         }
+
         if (ret < 0)
             return ret;
     }
diff --git a/fftools/ffplay.c b/fftools/ffplay.c
index 8f050e16e6..2c77612193 100644
--- a/fftools/ffplay.c
+++ b/fftools/ffplay.c
@@ -1914,19 +1914,33 @@  static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const c
 } while (0)
 
     if (autorotate) {
-        double theta  = get_rotation(is->video_st);
+        int hflip;
+        double theta  = get_rotation_hflip(is->video_st, &hflip);
 
-        if (fabs(theta - 90) < 1.0) {
+        if (fabs(theta) < 1.0) {
+            if (hflip)
+                INSERT_FILT("hflip", NULL);
+        } else if (fabs(theta - 90) < 1.0) {
             INSERT_FILT("transpose", "clock");
+            if (hflip)
+                INSERT_FILT("hflip", NULL);
         } else if (fabs(theta - 180) < 1.0) {
-            INSERT_FILT("hflip", NULL);
-            INSERT_FILT("vflip", NULL);
+            if (hflip) { // rotate 180 and hflip equals vflip
+                INSERT_FILT("vflip", NULL);
+            } else {
+                INSERT_FILT("hflip", NULL);
+                INSERT_FILT("vflip", NULL);
+            }
         } else if (fabs(theta - 270) < 1.0) {
             INSERT_FILT("transpose", "cclock");
+            if (hflip)
+                INSERT_FILT("hflip", NULL);
         } else if (fabs(theta) > 1.0) {
             char rotate_buf[64];
             snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
             INSERT_FILT("rotate", rotate_buf);
+            if (hflip)
+                INSERT_FILT("hflip", NULL);
         }
     }
 
diff --git a/libavutil/display.c b/libavutil/display.c
index a0076e067b..855de4a006 100644
--- a/libavutil/display.c
+++ b/libavutil/display.c
@@ -71,3 +71,17 @@  void av_display_matrix_flip(int32_t matrix[9], int hflip, int vflip)
         for (i = 0; i < 9; i++)
             matrix[i] *= flip[i % 3];
 }
+
+double av_display_rotation_hflip_get(const int32_t matrix[9], int *hflip)
+{
+    int32_t m[9];
+    *hflip = 0;
+    memcpy(m, matrix, sizeof(m));
+
+    if (m[0] > 0 && m[4] < 0 || m[0] < 0 && m[4] > 0 || 
+        m[1] > 0 && m[3] > 0 || m[1] < 0 && m[3] < 0) {
+        *hflip = 1;
+        av_display_matrix_flip(m, 1, 0);
+    }
+    return av_display_rotation_get(m);
+}
\ No newline at end of file
diff --git a/libavutil/display.h b/libavutil/display.h
index 515adad795..23d71a0bc5 100644
--- a/libavutil/display.h
+++ b/libavutil/display.h
@@ -106,6 +106,20 @@  void av_display_rotation_set(int32_t matrix[9], double angle);
  */
 void av_display_matrix_flip(int32_t matrix[9], int hflip, int vflip);
 
+/**
+ * Extract the rotation component and hflip status of the transformation matrix.
+ *
+ * @param matrix the transformation matrix
+ * @param hflip wille be set to 1 if the matrix need horizontal flipped
+ * @return the angle (in degrees) by which the transformation rotates the frame
+ *         counterclockwise. The angle will be in range [-180.0, 180.0],
+ *         or NaN if the matrix is singular.
+ *
+ * @note floating point numbers are inherently inexact, so callers are
+ *       recommended to round the return value to nearest integer before use.
+ */
+double av_display_rotation_hflip_get(const int32_t matrix[9], int* hflip);
+
 /**
  * @}
  * @}
diff --git a/libavutil/tests/display.c b/libavutil/tests/display.c
index 893ebb5543..65a0971e7b 100644
--- a/libavutil/tests/display.c
+++ b/libavutil/tests/display.c
@@ -35,6 +35,8 @@  static void print_matrix(int32_t matrix[9])
 int main(void)
 {
     int32_t matrix[9];
+    int hflip = 0;
+    double degree;
 
     // Set the matrix to 90 degrees
     av_display_rotation_set(matrix, 90);
@@ -56,6 +58,12 @@  int main(void)
     print_matrix(matrix);
     printf("degrees: %f\n", av_display_rotation_get(matrix));
 
+    // flip vertical
+    av_display_matrix_flip(matrix, 0, 1);
+    print_matrix(matrix);
+    degree = av_display_rotation_hflip_get(matrix, &hflip);
+    printf("degrees: %f, hflip: %i\n", degree, hflip);
+
     return 0;
 
 }
diff --git a/tests/ref/fate/display b/tests/ref/fate/display
index 251e7e0cdf..14b4c7db7c 100644
--- a/tests/ref/fate/display
+++ b/tests/ref/fate/display
@@ -14,3 +14,7 @@  degrees: 135.000000
 -46340 -46340 0
 0 0 1073741824
 degrees: -135.000000
+-46340 -46340 0
+-46340 46340 0
+0 0 1073741824
+degrees: 45.000000, hflip: 1