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ext/flac/: Set the channel layout when decoding FLAC files with more than 2 channels as defined by the FLAC spec. Fix...

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Original commit message from CVS:
* ext/flac/Makefile.am:
* ext/flac/gstflacdec.c: (gst_flac_dec_write):
Set the channel layout when decoding FLAC files with more than 2
channels as defined by the FLAC spec. Fixes bug #534570.
Also don't try to decode left/side, right/side and mid/side files
as we don't support this at all.
This commit is contained in:
Sebastian Dröge 2008-05-25 16:09:39 +00:00
parent e7e9e21731
commit 906f398df7
3 changed files with 67 additions and 1 deletions
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10
ChangeLog
View file

@ -1,3 +1,13 @@
2008-05-25 Sebastian Dröge <slomo@circular-chaos.org>
* ext/flac/Makefile.am:
* ext/flac/gstflacdec.c: (gst_flac_dec_write):
Set the channel layout when decoding FLAC files with more than 2
channels as defined by the FLAC spec. Fixes bug #534570.
Also don't try to decode left/side, right/side and mid/side files
as we don't support this at all.
2008-05-24 Tim-Philipp Müller <tim.muller at collabora co uk>
* configure.ac:

1
ext/flac/Makefile.am
View file

@ -4,6 +4,7 @@ libgstflac_la_SOURCES = gstflac.c gstflacdec.c gstflacenc.c
libgstflac_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_BASE_CFLAGS) $(GST_CFLAGS)
libgstflac_la_LIBADD = \
$(GST_PLUGINS_BASE_LIBS) -lgsttag-$(GST_MAJORMINOR) \
-lgstaudio-$(GST_MAJORMINOR) \
$(GST_BASE_LIBS) $(GST_LIBS) $(FLAC_LIBS)
libgstflac_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)

57
ext/flac/gstflacdec.c
View file

@ -55,9 +55,51 @@
#include <gst/gst-i18n-plugin.h>
#include <gst/gsttagsetter.h>
#include <gst/base/gsttypefindhelper.h>
#include <gst/audio/multichannel.h>
#include <gst/tag/tag.h>
/* Taken from http://flac.sourceforge.net/format.html#frame_header */
static const GstAudioChannelPosition channel_positions[8][8] = {
{GST_AUDIO_CHANNEL_POSITION_FRONT_MONO},
{GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT}, {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER}, {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT}, {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT}, {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_LFE,
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT},
/* FIXME: 7/8 channel layouts are not defined in the FLAC specs */
{
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_LFE,
GST_AUDIO_CHANNEL_POSITION_REAR_CENTER}, {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_LFE,
GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT}
};
GST_DEBUG_CATEGORY_STATIC (flacdec_debug);
#define GST_CAT_DEFAULT flacdec_debug
@ -1043,6 +1085,13 @@ gst_flac_dec_write (GstFlacDec * flacdec, const FLAC__Frame * frame,
goto done;
}
/* TODO: we don't support left/side, right/side and mid/side */
if (frame->header.channel_assignment != FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT) {
GST_ERROR_OBJECT (flacdec, "unsupported channel assignment: %s\n",
FLAC__ChannelAssignmentString[frame->header.channel_assignment]);
return GST_FLOW_ERROR;
}
if (!GST_PAD_CAPS (flacdec->srcpad)) {
GstCaps *caps;
@ -1057,6 +1106,12 @@ gst_flac_dec_write (GstFlacDec * flacdec, const FLAC__Frame * frame,
"rate", G_TYPE_INT, frame->header.sample_rate,
"channels", G_TYPE_INT, channels, NULL);
if (channels > 2) {
GstStructure *s = gst_caps_get_structure (caps, 0);
gst_audio_set_channel_positions (s, channel_positions[channels - 1]);
}
flacdec->depth = depth;
flacdec->width = width;
flacdec->channels = channels;