Commit c5d83ba2 authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab
Browse files

media: vidtv: Add a music instead of playing a single tone 



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: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent c2a9baf9

drivers/media/test-drivers/vidtv/vidtv_encoder.h

+70 −0
Original line number Diff line number Diff line
@@ -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;

drivers/media/test-drivers/vidtv/vidtv_s302m.c

+95 −9
Original line number Diff line number Diff line
@@ -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) */

static const 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;

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