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speaker-test.c - fix pink noise generator on big-endian archs

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This patch makes speaker-test fill the buffers with properly coded data on
both big- and little-endian processors.

Signed-off-by: Giuliano Pochini <pochini@shiny.it>
This commit is contained in:
Giuliano Pochini 2008-04-28 09:16:27 +02:00 committed by Jaroslav Kysela
parent 6372f4acc2
commit 1b7f9278af
1 changed files with 41 additions and 11 deletions
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52
speaker-test/speaker-test.c
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@ -259,7 +259,8 @@ static void generate_pink_noise( uint8_t *frames, int channel, int count) {
while (count-- > 0) { while (count-- > 0) {
for(chn=0;chn<channels;chn++) { for(chn=0;chn<channels;chn++) {
if (sample_size_bits == 8) { switch (format) {
case SND_PCM_FORMAT_S8:
if (chn==channel) { if (chn==channel) {
res = generate_pink_noise_sample(&pink) * 0x03fffffff; /* Don't use MAX volume */ res = generate_pink_noise_sample(&pink) * 0x03fffffff; /* Don't use MAX volume */
ires = res; ires = res;
@ -267,35 +268,64 @@ static void generate_pink_noise( uint8_t *frames, int channel, int count) {
} else { } else {
*samp8++ = 0; *samp8++ = 0;
} }
} else if (sample_size_bits == 16) { break;
case SND_PCM_FORMAT_S16_LE:
if (chn==channel) { if (chn==channel) {
res = generate_pink_noise_sample(&pink) * 0x03fffffff; /* Don't use MAX volume */ res = generate_pink_noise_sample(&pink) * 0x03fffffff; /* Don't use MAX volume */
ires = res; ires = res;
*samp16++ = ires >>16; #if __BYTE_ORDER == __LITTLE_ENDIAN
*samp16++ = ires >> 16;
#elif __BYTE_ORDER == __BIG_ENDIAN
*samp16++ = bswap_16(ires >> 16);
#endif
} else { } else {
*samp16++ = 0; *samp16++ = 0;
} }
} else if ((sample_size_bits == 32) && (format == SND_PCM_FORMAT_FLOAT_LE)) { break;
case SND_PCM_FORMAT_S16_BE:
if (chn==channel) { if (chn==channel) {
res = generate_pink_noise_sample(&pink) * 0.75; /* Don't use MAX volume */ res = generate_pink_noise_sample(&pink) * 0x03fffffff; /* Don't use MAX volume */
fres = res; ires = res;
*samp_f++ = fres; #if __BYTE_ORDER == __BIG_ENDIAN
*samp16++ = ires >> 16;
#elif __BYTE_ORDER == __LITTLE_ENDIAN
*samp16++ = bswap_16(ires >> 16);
#endif
} else { } else {
*samp_f++ = 0.0; *samp16++ = 0;
} }
} else if ((sample_size_bits == 32) && (format != SND_PCM_FORMAT_FLOAT_LE)) { break;
case SND_PCM_FORMAT_S32_LE:
if (chn==channel) {
res = generate_pink_noise_sample(&pink) * 0x03fffffff; /* Don't use MAX volume */
ires = res;
#if __BYTE_ORDER == __LITTLE_ENDIAN
*samp32++ = ires;
#elif __BYTE_ORDER == __BIG_ENDIAN
*samp32++ = bswap_32(ires);
#endif
} else {
*samp32++ = 0;
}
break;
case SND_PCM_FORMAT_S32_BE:
if (chn==channel) { if (chn==channel) {
res = generate_pink_noise_sample(&pink) * 0x03fffffff; /* Don't use MAX volume */ res = generate_pink_noise_sample(&pink) * 0x03fffffff; /* Don't use MAX volume */
ires = res; ires = res;
#if __BYTE_ORDER == __BIG_ENDIAN
*samp32++ = ires; *samp32++ = ires;
#elif __BYTE_ORDER == __LITTLE_ENDIAN
*samp32++ = bswap_32(ires);
#endif
} else { } else {
*samp32++ = 0; *samp32++ = 0;
} }
break;
default:
;
} }
} }
} }
} }
static int set_hwparams(snd_pcm_t *handle, snd_pcm_hw_params_t *params, snd_pcm_access_t access) { static int set_hwparams(snd_pcm_t *handle, snd_pcm_hw_params_t *params, snd_pcm_access_t access) {