Implement support signed 24 bit samples, packed in 3 bytes.

Signed-off-by: Julian Scheel julian@jusst.de --- speaker-test/speaker-test.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+)

diff --git a/speaker-test/speaker-test.c b/speaker-test/speaker-test.c index 46b0589..dbee63f 100644 --- a/speaker-test/speaker-test.c +++ b/speaker-test/speaker-test.c @@ -284,6 +284,7 @@ static const int supported_formats[] = { SND_PCM_FORMAT_S16_LE, SND_PCM_FORMAT_S16_BE, SND_PCM_FORMAT_FLOAT_LE, + SND_PCM_FORMAT_S24_3LE, SND_PCM_FORMAT_S32_LE, SND_PCM_FORMAT_S32_BE, -1 @@ -341,6 +342,19 @@ static void generate_sine(uint8_t *frames, int channel, int count, double *_phas *samp_f++ = 0.0; } break; + case SND_PCM_FORMAT_S24_3LE: + if (chn==channel) { + res = (sin((phase * 2 * M_PI) / max_phase - M_PI)) * generator_scale * 0x7fffff; + ires = res; + *samp8++ = LE_INT(ires); + *samp8++ = LE_INT(ires) >> 8; + *samp8++ = LE_INT(ires) >> 16; + } else { + *samp8++ = 0; + *samp8++ = 0; + *samp8++ = 0; + } + break; case SND_PCM_FORMAT_S32_LE: if (chn==channel) { res = (sin((phase * 2 * M_PI) / max_phase - M_PI)) * generator_scale * 0x7fffffff; @@ -415,6 +429,19 @@ static void generate_pink_noise( uint8_t *frames, int channel, int count) { *samp16++ = 0; } break; + case SND_PCM_FORMAT_S24_3LE: + if (chn==channel) { + res = generate_pink_noise_sample(&pink) * generator_scale * 0x07fffff; + ires = res; + *samp8++ = LE_INT(ires); + *samp8++ = LE_INT(ires) >> 8; + *samp8++ = LE_INT(ires) >> 16; + } else { + *samp8++ = 0; + *samp8++ = 0; + *samp8++ = 0; + } + break; case SND_PCM_FORMAT_S32_LE: if (chn==channel) { res = generate_pink_noise_sample(&pink) * generator_scale * 0x07fffffff; @@ -482,6 +509,17 @@ static void generate_pattern(uint8_t *frames, int channel, int count, int *_patt *samp_f++ = 0.0; } break; + case SND_PCM_FORMAT_S24_3LE: + if (chn==channel) { + *samp8++ = LE_INT(pattern); + *samp8++ = LE_INT(pattern) >> 8; + *samp8++ = LE_INT(pattern) >> 16; + } else { + *samp8++ = 0; + *samp8++ = 0; + *samp8++ = 0; + } + break; case SND_PCM_FORMAT_S32_LE: if (chn==channel) { *samp32++ = LE_INT(pattern);