Anthony/open-story-teller
1
0
Fork 0
mirror of https://github.com/arabine/open-story-teller.git synced 2025-12-06 17:09:06 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

first mono support (still glitches in audio)

Browse source
This commit is contained in:
Anthony Rabine 2023-08-12 15:50:34 +02:00
parent 9e73d71f4b
commit a8c5ac4ba0
2 changed files with 13 additions and 19 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
software/platform/raspberry-pico-w/pico_i2s.c
View file

@ -21,7 +21,7 @@ void pico_i2s_set_frequency(const pio_i2s *i2s, const audio_i2s_config_t *config
// Pour le calcul de la fréquence, le nombre de canaux est toujours fixé à 2
// car c'est notre format de sortie I2S
// Dans le cas du mono, on l'a détecté en amont et on a copié l'échantillon dans la voie de droite
float bitClk = config->freq * config->bps * config->channels /* channels */ * 2.0 /* edges per clock */;
float bitClk = config->freq * config->bps * 2.0 /* channels */ * 2.0 /* edges per clock */;
pio_sm_set_clkdiv(i2s->pio, i2s->sm_dout, (float)clock_get_hz(clk_sys) / bitClk);
}

30
software/system/audio_player.c
View file

@ -176,12 +176,15 @@ static int get_audio_buf(audio_ctx_t *ctx, int32_t *buf_32b)
uint32_t lvl_l = 0;
uint32_t lvl_r = 0;
bool mono = ctx->audio_info.channels == 1;
number = 0; // number to transfer (en octets)
while (number < sizeof(raw_buf))
int raw_max_size = mono ? sizeof(raw_buf) / 2 : sizeof(raw_buf);
while (number < raw_max_size)
{
file_rest = ctx->audio_info.data_size - ctx->audio_info.data_offset;
trans_rest = sizeof(raw_buf) - number; // en octets, 2048 au début
trans_rest = raw_max_size - number; // en octets, 2048 au début
trans = (file_rest >= trans_rest) ? trans_rest : file_rest;
// LEDR(1);
fr = f_read(&ctx->fil, &raw_buf[number], trans, &br);
@ -206,41 +209,32 @@ static int get_audio_buf(audio_ctx_t *ctx, int32_t *buf_32b)
}
}
bool mono = ctx->audio_info.channels == 1;
uint32_t index = 4;
if (mono)
{
index = 2;
}
uint32_t index = 0;
// samples : total bytes devided by 2 (16 bits) and by two again (2 channels)
for (i = 0; i < number / index; i++)
for (i = 0; i < STEREO_BUFFER_SIZE / 2; i++)
{
// buf_32b[i * 2 + 0] = (int32_t)swap16b((int32_t)buf_16b[i * 2 + 0] * vol_table[ctx->volume]) + DAC_ZERO_VALUE; // L
// buf_32b[i * 2 + 1] = (int32_t)swap16b((int32_t)buf_16b[i * 2 + 1] * vol_table[ctx->volume]) + DAC_ZERO_VALUE; // R
// Avec le AUDIO PICO de waveshare, on entend un truc
buf_32b[i * 2] = ((int32_t)((int16_t)leu16_get(&raw_buf[i * index]))) << 16;
buf_32b[i * 2] = ((int32_t)((int16_t)leu16_get(&raw_buf[index]))) << 16;
index += 2;
if (mono)
{
buf_32b[i * 2 + 1] = buf_32b[i * 2];
}
else
{
buf_32b[i * 2 + 1] = ((int32_t)((int16_t)leu16_get(&raw_buf[i * index + 2]))) << 16;
buf_32b[i * 2 + 1] = ((int32_t)((int16_t)leu16_get(&raw_buf[index]))) << 16;
index += 2;
}
// buf_32b[i * 2] = 1;
// buf_32b[i * 2 + 1] = 4;
// lvl_l += ((int32_t)buf_16b[i * 2 + 0] * buf_16b[i * 2 + 0]) / 32768;
// lvl_r += ((int32_t)buf_16b[i * 2 + 1] * buf_16b[i * 2 + 1]) / 32768;
}
// ctx->audio_info.lvl_l = get_level(lvl_l / (number / 4));
// ctx->audio_info.lvl_r = get_level(lvl_r / (number / 4));
ctx->transfer_size = number / 2; // 32 bytes tranfers
ctx->transfer_size = STEREO_BUFFER_SIZE; // 32 bytes tranfers
return _next_is_end;
}