lkml.org 
[lkml]   [2020]   [Sep]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] media: vidtv: Add a music instead of playing a single tone
Date
Keep playing a single tone is not too nice, and prevents
checking some weird things.

So, instead, implement a simple tone generator, changing
the code to play a public domain song (5th Symphony of
Beethoven), using sinusoidal waves.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
.../media/test-drivers/vidtv/vidtv_encoder.h | 70 ++++++++++++
.../media/test-drivers/vidtv/vidtv_s302m.c | 104 ++++++++++++++++--
2 files changed, 165 insertions(+), 9 deletions(-)

diff --git a/drivers/media/test-drivers/vidtv/vidtv_encoder.h b/drivers/media/test-drivers/vidtv/vidtv_encoder.h
index 6da63abdddea..a7c99cafab4f 100644
--- a/drivers/media/test-drivers/vidtv/vidtv_encoder.h
+++ b/drivers/media/test-drivers/vidtv/vidtv_encoder.h
@@ -28,6 +28,73 @@ struct vidtv_access_unit {
struct vidtv_access_unit *next;
};

+/* Some musical notes, used by a tone generator */
+enum musical_notes {
+ NOTE_SILENT = 0,
+
+ NOTE_C_2 = 65,
+ NOTE_CS_2 = 69,
+ NOTE_D_2 = 73,
+ NOTE_DS_2 = 78,
+ NOTE_E_2 = 82,
+ NOTE_F_2 = 87,
+ NOTE_FS_2 = 93,
+ NOTE_G_2 = 98,
+ NOTE_GS_2 = 104,
+ NOTE_A_2 = 110,
+ NOTE_AS_2 = 117,
+ NOTE_B_2 = 123,
+ NOTE_C_3 = 131,
+ NOTE_CS_3 = 139,
+ NOTE_D_3 = 147,
+ NOTE_DS_3 = 156,
+ NOTE_E_3 = 165,
+ NOTE_F_3 = 175,
+ NOTE_FS_3 = 185,
+ NOTE_G_3 = 196,
+ NOTE_GS_3 = 208,
+ NOTE_A_3 = 220,
+ NOTE_AS_3 = 233,
+ NOTE_B_3 = 247,
+ NOTE_C_4 = 262,
+ NOTE_CS_4 = 277,
+ NOTE_D_4 = 294,
+ NOTE_DS_4 = 311,
+ NOTE_E_4 = 330,
+ NOTE_F_4 = 349,
+ NOTE_FS_4 = 370,
+ NOTE_G_4 = 392,
+ NOTE_GS_4 = 415,
+ NOTE_A_4 = 440,
+ NOTE_AS_4 = 466,
+ NOTE_B_4 = 494,
+ NOTE_C_5 = 523,
+ NOTE_CS_5 = 554,
+ NOTE_D_5 = 587,
+ NOTE_DS_5 = 622,
+ NOTE_E_5 = 659,
+ NOTE_F_5 = 698,
+ NOTE_FS_5 = 740,
+ NOTE_G_5 = 784,
+ NOTE_GS_5 = 831,
+ NOTE_A_5 = 880,
+ NOTE_AS_5 = 932,
+ NOTE_B_5 = 988,
+ NOTE_C_6 = 1047,
+ NOTE_CS_6 = 1109,
+ NOTE_D_6 = 1175,
+ NOTE_DS_6 = 1245,
+ NOTE_E_6 = 1319,
+ NOTE_F_6 = 1397,
+ NOTE_FS_6 = 1480,
+ NOTE_G_6 = 1568,
+ NOTE_GS_6 = 1661,
+ NOTE_A_6 = 1760,
+ NOTE_AS_6 = 1865,
+ NOTE_B_6 = 1976,
+ NOTE_C_7 = 2093
+};
+
/**
* struct vidtv_encoder - A generic encoder type.
* @id: So we can cast to a concrete implementation when needed.
@@ -64,6 +131,9 @@ struct vidtv_encoder {
u32 encoder_buf_offset;

u64 sample_count;
+ int last_duration;
+ int note_offset;
+ enum musical_notes last_tone;

struct vidtv_access_unit *access_units;

diff --git a/drivers/media/test-drivers/vidtv/vidtv_s302m.c b/drivers/media/test-drivers/vidtv/vidtv_s302m.c
index 2a40ef15f715..122a450fb27c 100644
--- a/drivers/media/test-drivers/vidtv/vidtv_s302m.c
+++ b/drivers/media/test-drivers/vidtv/vidtv_s302m.c
@@ -40,6 +40,9 @@
#define S302M_BLOCK_SZ 192
#define S302M_SIN_LUT_NUM_ELEM 1024

+/* Used by the tone generator: number of samples for PI */
+#define PI 180
+
static const u8 reverse[256] = {
/* from ffmpeg */
0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, 0x10, 0x90, 0x50, 0xD0,
@@ -66,10 +69,74 @@ static const u8 reverse[256] = {
0x3F, 0xBF, 0x7F, 0xFF,
};

-/* Used by the tone generator */
-#define SAMPLE_RATE 48000
-#define PI 180
-#define NOTE_A4 440
+struct tone_duration {
+ enum musical_notes note;
+ int duration;
+};
+
+#define COMPASS 120 /* beats per minute (Allegro) */
+const static struct tone_duration beethoven_5th_symphony[] = {
+ { NOTE_E_6, 128}, { NOTE_DS_6, 128}, { NOTE_E_6, 128},
+ { NOTE_DS_6, 128}, { NOTE_E_6, 128}, { NOTE_B_5, 128},
+ { NOTE_D_6, 128}, { NOTE_C_6, 128}, { NOTE_A_3, 128},
+ { NOTE_E_4, 128}, { NOTE_A_4, 128}, { NOTE_C_5, 128},
+ { NOTE_E_5, 128}, { NOTE_A_5, 128}, { NOTE_E_3, 128},
+ { NOTE_E_4, 128}, { NOTE_GS_4, 128}, { NOTE_E_5, 128},
+ { NOTE_GS_5, 128}, { NOTE_B_5, 128}, { NOTE_A_3, 128},
+ { NOTE_E_4, 128}, { NOTE_A_4, 128}, { NOTE_E_5, 128},
+ { NOTE_E_6, 128}, { NOTE_DS_6, 128}, { NOTE_E_6, 128},
+ { NOTE_DS_6, 128}, { NOTE_E_6, 128}, { NOTE_B_5, 128},
+ { NOTE_D_6, 128}, { NOTE_C_6, 128}, { NOTE_A_3, 128},
+ { NOTE_E_4, 128}, { NOTE_A_4, 128}, { NOTE_C_5, 128},
+ { NOTE_E_5, 128}, { NOTE_A_5, 128}, { NOTE_E_3, 128},
+ { NOTE_E_4, 128}, { NOTE_GS_4, 128}, { NOTE_E_5, 128},
+ { NOTE_C_6, 128}, { NOTE_B_5, 128}, { NOTE_A_3, 128},
+ { NOTE_E_4, 128}, { NOTE_A_4, 128}, { NOTE_SILENT, 128},
+
+ { NOTE_E_6, 128}, { NOTE_DS_6, 128}, { NOTE_E_6, 128},
+ { NOTE_DS_6, 128}, { NOTE_E_6, 128}, { NOTE_B_5, 128},
+ { NOTE_D_6, 128}, { NOTE_C_6, 128}, { NOTE_A_3, 128},
+ { NOTE_E_4, 128}, { NOTE_A_4, 128}, { NOTE_C_5, 128},
+ { NOTE_E_5, 128}, { NOTE_A_5, 128}, { NOTE_E_3, 128},
+ { NOTE_E_4, 128}, { NOTE_GS_4, 128}, { NOTE_E_5, 128},
+ { NOTE_GS_5, 128}, { NOTE_B_5, 128}, { NOTE_A_3, 128},
+ { NOTE_E_4, 128}, { NOTE_A_4, 128}, { NOTE_E_5, 128},
+ { NOTE_E_6, 128}, { NOTE_DS_6, 128}, { NOTE_E_6, 128},
+ { NOTE_DS_6, 128}, { NOTE_E_6, 128}, { NOTE_B_5, 128},
+ { NOTE_D_6, 128}, { NOTE_C_6, 128}, { NOTE_A_3, 128},
+ { NOTE_E_4, 128}, { NOTE_A_4, 128}, { NOTE_C_5, 128},
+ { NOTE_E_5, 128}, { NOTE_A_5, 128}, { NOTE_E_3, 128},
+ { NOTE_E_4, 128}, { NOTE_GS_4, 128}, { NOTE_E_5, 128},
+ { NOTE_C_6, 128}, { NOTE_B_5, 128}, { NOTE_A_3, 128},
+ { NOTE_E_4, 128}, { NOTE_A_4, 128}, { NOTE_B_4, 128},
+ { NOTE_C_5, 128}, { NOTE_D_5, 128}, { NOTE_C_4, 128},
+ { NOTE_G_4, 128}, { NOTE_C_5, 128}, { NOTE_G_4, 128},
+ { NOTE_F_5, 128}, { NOTE_E_5, 128}, { NOTE_G_3, 128},
+ { NOTE_G_4, 128}, { NOTE_B_3, 128}, { NOTE_F_4, 128},
+ { NOTE_E_5, 128}, { NOTE_D_5, 128}, { NOTE_A_3, 128},
+ { NOTE_E_4, 128}, { NOTE_A_4, 128}, { NOTE_E_4, 128},
+ { NOTE_D_5, 128}, { NOTE_C_5, 128}, { NOTE_E_3, 128},
+ { NOTE_E_4, 128}, { NOTE_E_5, 255}, { NOTE_E_6, 128},
+ { NOTE_E_5, 128}, { NOTE_E_6, 128}, { NOTE_E_5, 255},
+ { NOTE_DS_5, 128}, { NOTE_E_5, 128}, { NOTE_DS_6, 128},
+ { NOTE_E_6, 128}, { NOTE_DS_5, 128}, { NOTE_E_5, 128},
+ { NOTE_DS_6, 128}, { NOTE_E_6, 128}, { NOTE_DS_6, 128},
+ { NOTE_E_6, 128}, { NOTE_DS_6, 128}, { NOTE_E_6, 128},
+ { NOTE_B_5, 128}, { NOTE_D_6, 128}, { NOTE_C_6, 128},
+ { NOTE_A_3, 128}, { NOTE_E_4, 128}, { NOTE_A_4, 128},
+ { NOTE_C_5, 128}, { NOTE_E_5, 128}, { NOTE_A_5, 128},
+ { NOTE_E_3, 128}, { NOTE_E_4, 128}, { NOTE_GS_4, 128},
+ { NOTE_E_5, 128}, { NOTE_GS_5, 128}, { NOTE_B_5, 128},
+ { NOTE_A_3, 128}, { NOTE_E_4, 128}, { NOTE_A_4, 128},
+ { NOTE_E_5, 128}, { NOTE_E_6, 128}, { NOTE_DS_6, 128},
+ { NOTE_E_6, 128}, { NOTE_DS_6, 128}, { NOTE_E_6, 128},
+ { NOTE_B_5, 128}, { NOTE_D_6, 128}, { NOTE_C_6, 128},
+ { NOTE_A_3, 128}, { NOTE_E_4, 128}, { NOTE_A_4, 128},
+ { NOTE_C_5, 128}, { NOTE_E_5, 128}, { NOTE_A_5, 128},
+ { NOTE_E_3, 128}, { NOTE_E_4, 128}, { NOTE_GS_4, 128},
+ { NOTE_E_5, 128}, { NOTE_C_6, 128}, { NOTE_B_5, 128},
+ { NOTE_C_5, 255}, { NOTE_C_5, 255}, { NOTE_SILENT, 512},
+};

static struct vidtv_access_unit *vidtv_s302m_access_unit_init(struct vidtv_access_unit *head)
{
@@ -187,15 +254,33 @@ static u16 vidtv_s302m_get_sample(struct vidtv_encoder *e)

if (!e->src_buf) {
/*
- * Simple tone generator. For now, just generates a 440 Hz
- * sinusoidal wave.
+ * Simple tone generator: play the tones at the
+ * beethoven_5th_symphony array.
*/
- pos = (2 * PI * e->src_buf_offset * NOTE_A4 / SAMPLE_RATE);
+ if (e->last_duration <= 0) {
+ if (e->src_buf_offset >= ARRAY_SIZE(beethoven_5th_symphony))
+ e->src_buf_offset = 0;

- if (pos == 360)
+ e->last_tone = beethoven_5th_symphony[e->src_buf_offset].note;
+ e->last_duration = beethoven_5th_symphony[e->src_buf_offset].duration * S302M_SAMPLING_RATE_HZ / COMPASS / 5;
+ e->src_buf_offset++;
+ e->note_offset = 0;
+ } else {
+ e->last_duration--;
+ }
+
+ /* Handle silent */
+ if (!e->last_tone) {
e->src_buf_offset = 0;
+ return 0x8000;
+ }
+
+ pos = (2 * PI * e->note_offset * e->last_tone / S302M_SAMPLING_RATE_HZ);
+
+ if (pos == 360)
+ e->note_offset = 0;
else
- e->src_buf_offset++;
+ e->note_offset++;

return (fixp_sin32(pos % (2 * PI)) >> 16) + 0x8000;
}
@@ -388,6 +473,7 @@ struct vidtv_encoder
e->encoder_buf_offset = 0;

e->sample_count = 0;
+ e->last_duration = 0;

e->src_buf = (args.src_buf) ? args.src_buf : NULL;
e->src_buf_sz = (args.src_buf) ? args.src_buf_sz : 0;
--
2.26.2
\
 
 \ /
  Last update: 2020-09-16 00:52    [W:0.030 / U:1.936 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site