[vlc-commits] PulseAudio: negotiate digital pass-through for A/52 and DTS
Rémi Denis-Courmont
git at videolan.org
Tue Oct 4 19:33:00 CEST 2011
vlc/vlc-1.1 | branch: master | Rémi Denis-Courmont <remi at remlab.net> | Tue Sep 27 20:36:04 2011 +0300| [3367e357d8c416d14871c8f2bc5b02f3ab325c7a] | committer: Rémi Denis-Courmont
PulseAudio: negotiate digital pass-through for A/52 and DTS
(cherry picked from commit 5b24e072c971c5984ba29a16f029e36f13b3d5d1)
Conflicts:
modules/audio_output/pulse.c
> http://git.videolan.org/gitweb.cgi/vlc/vlc-1.1.git/?a=commit;h=3367e357d8c416d14871c8f2bc5b02f3ab325c7a
---
modules/audio_output/pulse.c | 69 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 69 insertions(+), 0 deletions(-)
diff --git a/modules/audio_output/pulse.c b/modules/audio_output/pulse.c
index 154865f..d67dc31 100644
--- a/modules/audio_output/pulse.c
+++ b/modules/audio_output/pulse.c
@@ -439,6 +439,9 @@ static int Open(vlc_object_t *obj)
/* Sample format specification */
struct pa_sample_spec ss;
+#if PA_CHECK_VERSION(1,0,0)
+ pa_encoding_t encoding = PA_ENCODING_INVALID;
+#endif
switch(aout->output.output.i_format)
{
@@ -479,6 +482,28 @@ static int Open(vlc_object_t *obj)
case VLC_CODEC_U8:
ss.format = PA_SAMPLE_U8;
break;
+#if PA_CHECK_VERSION(1,0,0)
+ case VLC_CODEC_A52:
+ aout->output.output.i_format = VLC_CODEC_SPDIFL;
+ encoding = PA_ENCODING_AC3_IEC61937;
+ ss.format = HAVE_FPU ? PA_SAMPLE_FLOAT32NE : PA_SAMPLE_S16NE;
+ break;
+ /*case VLC_CODEC_EAC3:
+ aout->output.output.i_format = VLC_CODEC_SPDIFL FIXME;
+ encoding = PA_ENCODING_EAC3_IEC61937;
+ ss.format = HAVE_FPU ? PA_SAMPLE_FLOAT32NE : PA_SAMPLE_S16NE;
+ break;
+ case VLC_CODEC_MPGA:
+ aout->output.output.i_format = VLC_CODEC_SPDIFL FIXME;
+ encoding = PA_ENCODING_MPEG_IEC61937;
+ ss.format = HAVE_FPU ? PA_SAMPLE_FLOAT32NE : PA_SAMPLE_S16NE;
+ break;*/
+ case VLC_CODEC_DTS:
+ aout->output.output.i_format = VLC_CODEC_SPDIFL;
+ encoding = PA_ENCODING_DTS_IEC61937;
+ ss.format = HAVE_FPU ? PA_SAMPLE_FLOAT32NE : PA_SAMPLE_S16NE;
+ break;
+#endif
default:
if (HAVE_FPU)
{
@@ -605,8 +630,37 @@ static int Open(vlc_object_t *obj)
goto fail;
}
+#if PA_CHECK_VERSION(1,0,0)
+ pa_format_info *formatv[2];
+ unsigned formatc = 0;
+
+ /* Favor digital pass-through if available*/
+ if (encoding != PA_ENCODING_INVALID) {
+ formatv[formatc] = pa_format_info_new();
+ formatv[formatc]->encoding = encoding;
+ pa_format_info_set_rate(formatv[formatc], ss.rate);
+ pa_format_info_set_channels(formatv[formatc], ss.channels);
+ formatc++;
+ }
+
+ /* Fallback to PCM */
+ formatv[formatc] = pa_format_info_new();
+ formatv[formatc]->encoding = PA_ENCODING_PCM;
+ pa_format_info_set_sample_format(formatv[formatc], ss.format);
+ pa_format_info_set_rate(formatv[formatc], ss.rate);
+ pa_format_info_set_channels(formatv[formatc], ss.channels);
+ formatc++;
+
/* Create a playback stream */
+ pa_stream *s;
+
+ s = pa_stream_new_extended(ctx, "audio stream", formatv, formatc, NULL);
+
+ for (unsigned i = 0; i < formatc; i++)
+ pa_format_info_free(formatv[i]);
+#else
pa_stream *s = pa_stream_new(ctx, "audio stream", &ss, &map);
+#endif
if (s == NULL) {
error(aout, "cannot create stream", ctx);
goto fail;
@@ -627,6 +681,21 @@ static int Open(vlc_object_t *obj)
}
stream_moved_cb(s, aout);
+#if PA_CHECK_VERSION(1,0,0)
+ if (encoding != PA_ENCODING_INVALID) {
+ const pa_format_info *info = pa_stream_get_format_info(s);
+
+ assert (info != NULL);
+ if (pa_format_info_is_pcm (info)) {
+ msg_Dbg(aout, "digital pass-through not available");
+ aout->output.output.i_format = HAVE_FPU ? VLC_CODEC_FL32 : VLC_CODEC_S16N;
+ } else {
+ msg_Dbg(aout, "digital pass-through enabled");
+ pa_stream_set_latency_update_callback(s, NULL, NULL);
+ }
+ }
+#endif
+
const struct pa_buffer_attr *pba = pa_stream_get_buffer_attr(s);
msg_Dbg(aout, "using buffer metrics: maxlength=%u, tlength=%u, "
"prebuf=%u, minreq=%u",
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