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https://github.com/alsa-project/alsa-utils
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speaker-test.c - fix pink noise generator on big-endian archs
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>
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6372f4acc2
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1 changed files with 41 additions and 11 deletions
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@ -259,7 +259,8 @@ static void generate_pink_noise( uint8_t *frames, int channel, int count) {
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while (count-- > 0) {
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for(chn=0;chn<channels;chn++) {
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if (sample_size_bits == 8) {
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switch (format) {
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case SND_PCM_FORMAT_S8:
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if (chn==channel) {
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res = generate_pink_noise_sample(&pink) * 0x03fffffff; /* Don't use MAX volume */
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ires = res;
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@ -267,35 +268,64 @@ static void generate_pink_noise( uint8_t *frames, int channel, int count) {
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} else {
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*samp8++ = 0;
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}
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} else if (sample_size_bits == 16) {
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break;
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case SND_PCM_FORMAT_S16_LE:
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if (chn==channel) {
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res = generate_pink_noise_sample(&pink) * 0x03fffffff; /* Don't use MAX volume */
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ires = res;
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*samp16++ = ires >>16;
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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*samp16++ = ires >> 16;
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#elif __BYTE_ORDER == __BIG_ENDIAN
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*samp16++ = bswap_16(ires >> 16);
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#endif
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} else {
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*samp16++ = 0;
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}
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} else if ((sample_size_bits == 32) && (format == SND_PCM_FORMAT_FLOAT_LE)) {
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break;
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case SND_PCM_FORMAT_S16_BE:
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if (chn==channel) {
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res = generate_pink_noise_sample(&pink) * 0.75; /* Don't use MAX volume */
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fres = res;
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*samp_f++ = fres;
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res = generate_pink_noise_sample(&pink) * 0x03fffffff; /* Don't use MAX volume */
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ires = res;
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#if __BYTE_ORDER == __BIG_ENDIAN
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*samp16++ = ires >> 16;
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#elif __BYTE_ORDER == __LITTLE_ENDIAN
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*samp16++ = bswap_16(ires >> 16);
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#endif
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} else {
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*samp_f++ = 0.0;
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*samp16++ = 0;
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}
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} else if ((sample_size_bits == 32) && (format != SND_PCM_FORMAT_FLOAT_LE)) {
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break;
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case SND_PCM_FORMAT_S32_LE:
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if (chn==channel) {
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res = generate_pink_noise_sample(&pink) * 0x03fffffff; /* Don't use MAX volume */
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ires = res;
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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*samp32++ = ires;
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#elif __BYTE_ORDER == __BIG_ENDIAN
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*samp32++ = bswap_32(ires);
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#endif
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} else {
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*samp32++ = 0;
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}
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break;
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case SND_PCM_FORMAT_S32_BE:
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if (chn==channel) {
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res = generate_pink_noise_sample(&pink) * 0x03fffffff; /* Don't use MAX volume */
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ires = res;
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#if __BYTE_ORDER == __BIG_ENDIAN
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*samp32++ = ires;
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#elif __BYTE_ORDER == __LITTLE_ENDIAN
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*samp32++ = bswap_32(ires);
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#endif
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} else {
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*samp32++ = 0;
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}
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break;
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default:
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;
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}
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}
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}
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}
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static int set_hwparams(snd_pcm_t *handle, snd_pcm_hw_params_t *params, snd_pcm_access_t access) {
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