From c5d83ba23e66e539200de347cd6dca93b1041e3c Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Tue, 15 Sep 2020 15:50:52 +0200 Subject: [PATCH] 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: Mauro Carvalho Chehab --- drivers/media/test-drivers/vidtv/vidtv_encoder.h | 70 +++++++++++++++ drivers/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 6da63ab..a7c99ca 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 2a40ef1..25b7059 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) */ +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; -- 2.7.4