Don't change colorspace/range on mlt_image_none

This image format is supposed to instruct the producer to provide as
native or closest to source as possible. That can be useful by API but
also Movit uses this because it tries to handle things as much as
possible. This improves the color accuracy of SDR within a BT.2020/HLG
project on Movit.

Author: ddennedy

src/modules/avformat/producer_avformat.c

@@ -1822,6 +1822,7 @@ static mlt_colorspace convert_image_yuvp(producer_avformat self,
                                          int height,
                                          int src_pix_fmt,
                                          int dst_pix_fmt,
+                                         int dst_colorspace,
                                          int dst_full_range)
 {
     mlt_colorspace result = self->yuv_colorspace;
@@ -1834,10 +1835,10 @@ static mlt_colorspace convert_image_yuvp(producer_avformat self,
     mlt_image_format_planes(format, width, height, buffer, out_data, out_stride);
     if (!mlt_set_luma_transfer(context,
                                self->yuv_colorspace,
-                               profile->colorspace,
+                               dst_colorspace,
                                self->full_range,
                                dst_full_range))
-        result = profile->colorspace;
+        result = dst_colorspace;
     sws_scale(context,
               (const uint8_t *const *) frame->data,
               frame->linesize,
@@ -1942,6 +1943,7 @@ static void convert_image(producer_avformat self,
                           int width,
                           int height,
                           uint8_t **alpha,
+                          int dst_colorspace,
                           int dst_full_range)
 {
     mlt_profile profile = mlt_service_profile(MLT_PRODUCER_SERVICE(self->parent));
@@ -1955,7 +1957,7 @@ static void convert_image(producer_avformat self,
                   width,
                   height,
                   self->yuv_colorspace,
-                  profile->colorspace,
+                  dst_colorspace,
                   self->full_range,
                   dst_full_range);
 
@@ -2030,6 +2032,7 @@ static void convert_image(producer_avformat self,
                                         height,
                                         src_pix_fmt,
                                         dst_pix_fmt,
+                                        dst_colorspace,
                                         dst_full_range);
     } else {
         int i, c;
@@ -2039,7 +2042,7 @@ static void convert_image(producer_avformat self,
             .frame = frame,
             .dst_format = AV_PIX_FMT_YUYV422,
             .src_colorspace = self->yuv_colorspace,
-            .dst_colorspace = profile->colorspace,
+            .dst_colorspace = dst_colorspace,
             .src_full_range = self->full_range,
             .dst_full_range = dst_full_range,
         };
@@ -2093,7 +2096,7 @@ static void convert_image(producer_avformat self,
                 sliced_h_pix_fmt_conv_proc(i, i, c, &ctx);
         }
 
-        colorspace = profile->colorspace;
+        colorspace = dst_colorspace;
     }
     mlt_log_timings_end(NULL, __FUNCTION__);
 
@@ -2257,8 +2260,11 @@ static int producer_get_image(mlt_frame frame,
     uint8_t *alpha = NULL;
     int got_picture = 0;
     int image_size = 0;
+    mlt_profile profile = mlt_service_profile(MLT_PRODUCER_SERVICE(self->parent));
+    int dst_colorspace = (*format == mlt_image_none) ? self->yuv_colorspace : profile->colorspace;
     const char *dst_color_range = mlt_properties_get(frame_properties, "consumer.color_range");
-    int dst_full_range = mlt_image_full_range(dst_color_range);
+    int dst_full_range = (*format == mlt_image_none) ? self->full_range
+                                                     : mlt_image_full_range(dst_color_range);
 
     // if 10-bit libswscale only changes range when scaling, not simple pix_fmt conversion
     const struct AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(self->video_codec->pix_fmt);
@@ -2383,6 +2389,7 @@ static int producer_get_image(mlt_frame frame,
                           *width,
                           *height,
                           &alpha,
+                          dst_colorspace,
                           dst_full_range);
             got_picture = 1;
         }
@@ -2661,6 +2668,7 @@ static int producer_get_image(mlt_frame frame,
                                   *width,
                                   *height,
                                   &alpha,
+                                  dst_colorspace,
                                   dst_full_range);
                     self->current_position = int_position;
                 } else {