[Bug 757258] gstalsasink: iec61937 (Non-linear PCM bitstreams) not correctly working

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=757258

--- Comment #13 from Arnaud Pouliquen <arnaud.pouliquen at st.com> ---
By default alsasink_parse_spec function sets format to SND_PCM_FORMAT_S16_BE
for IEC pass through ( AC3, EAC3...).

Then, the test of the supported format is done in set_hwparams:

>     if (snd_pcm_hw_params_set_format (alsa->handle, params, alsa->format) < 0) {
>       alsa->format = SND_PCM_FORMAT_S16_LE;
SND_PCM_FORMAT_S16_BE not supported => set it to SND_PCM_FORMAT_S16_LE

>-      alsa->need_swap = TRUE;
alsa format is Little, so swap only if CPU is BIG.
>+      /* swap needed if system is big endian */
>+      alsa->need_swap = (G_BYTE_ORDER == G_BIG_ENDIAN);

Regards
Arnaud

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