[PATCH 05/31] media: vidtv: fix the tone generator logic

[Mauro Carvalho Chehab]

The tone generator logic were repeating the song after the
first silent. There's also a wrong logic at the note
offset calculus, which may create some noise.

Fix it.

Signed-off-by: Mauro Carvalho Chehab <mchehab+hua...@kernel.org>
---
 drivers/media/test-drivers/vidtv/vidtv_s302m.c | 14 ++++----------
 drivers/media/test-drivers/vidtv/vidtv_s302m.h |  2 +-
 2 files changed, 5 insertions(+), 11 deletions(-)

diff --git a/drivers/media/test-drivers/vidtv/vidtv_s302m.c 
b/drivers/media/test-drivers/vidtv/vidtv_s302m.c
index cbf89530aafe..fdb3d649c516 100644
--- a/drivers/media/test-drivers/vidtv/vidtv_s302m.c
+++ b/drivers/media/test-drivers/vidtv/vidtv_s302m.c
@@ -253,18 +253,12 @@ static u16 vidtv_s302m_get_sample(struct vidtv_encoder *e)
                        ctx->last_duration--;
                }
 
-               /* Handle silent */
-               if (!ctx->last_tone) {
-                       e->src_buf_offset = 0;
+               /* Handle pause notes */
+               if (!ctx->last_tone)
                        return 0x8000;
-               }
 
-               pos = (2 * PI * ctx->note_offset * ctx->last_tone / 
S302M_SAMPLING_RATE_HZ);
-
-               if (pos == 360)
-                       ctx->note_offset = 0;
-               else
-                       ctx->note_offset++;
+               pos = (2 * PI * ctx->note_offset * ctx->last_tone) / 
S302M_SAMPLING_RATE_HZ;
+               ctx->note_offset++;
 
                return (fixp_sin32(pos % (2 * PI)) >> 16) + 0x8000;
        }
diff --git a/drivers/media/test-drivers/vidtv/vidtv_s302m.h 
b/drivers/media/test-drivers/vidtv/vidtv_s302m.h
index a0101734e758..e990b755bb20 100644
--- a/drivers/media/test-drivers/vidtv/vidtv_s302m.h
+++ b/drivers/media/test-drivers/vidtv/vidtv_s302m.h
@@ -39,7 +39,7 @@ struct vidtv_s302m_ctx {
        u32 frame_index;
        u32 au_count;
        int last_duration;
-       int note_offset;
+       unsigned int note_offset;
        enum musical_notes last_tone;
 };
 
-- 
2.28.0