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361835979e
When using multichannel audio data and being needed to reorder channels,
audio data is not copied correctly because destination address of
memcpy is wrong.
For example, the following command
$ gst-launch-1.0 pulsesrc ! audio/x-raw,channels=6,format=S16LE ! filesink location=test.raw
will reproduce this issue if there is 6-ch audio input device.
This commit fixes that.
The detailed process of this issue is as follows:
1. gst-launch-1.0 calls gst_pulsesrc_prepare (gst-plugins-good/ext/pulse/pulsesrc.c)
1466 gst_pulsesrc_prepare (GstAudioSrc * asrc, GstAudioRingBufferSpec * spec)
1467 {
(skip...)
1480 {
1481 GstAudioRingBufferSpec s = *spec;
1482 const pa_channel_map *m;
1483
1484 m = pa_stream_get_channel_map (pulsesrc->stream);
1485 gst_pulse_channel_map_to_gst (m, &s);
1486 gst_audio_ring_buffer_set_channel_positions (GST_AUDIO_BASE_SRC
1487 (pulsesrc)->ringbuffer, s.info.position);
1488 }
In my environment, after line 1485 is processed, position of spec and s are
spec->info.position[0] = 0
spec->info.position[1] = 1
spec->info.position[2] = 2
spec->info.position[3] = 6
spec->info.position[4] = 7
spec->info.position[5] = 8
s.info.position[0] = 0
s.info.position[1] = 6
s.info.position[2] = 2
s.info.position[3] = 1
s.info.position[4] = 7
s.info.position[5] = 8
The values of spec->info.positions equal
GST_AUDIO_BASE_SRC(pulsesrc)->ringbuffer->spec->info.positions.
2. gst_audio_ring_buffer_set_channel_positions calls
gst_audio_get_channel_reorder_map.
3. Arguments of gst_audio_get_channel_reorder_map are
from = s.info.position
to = GST_AUDIO_BASE_SRC(pulsesrc)->ringbuffer->spec->info.positions
At the end of this function, reorder_map is set to
reorder_map[0] = 0
reorder_map[1] = 3
reorder_map[2] = 2
reorder_map[3] = 1
reorder_map[4] = 4
reorder_map[5] = 5
4. Go back to gst_audio_ring_buffer_set_channel_positions and
2065 buf->need_reorder = TRUE;
is processed.
5. Finally, in gst_audio_ring_buffer_read,
1821 if (need_reorder) {
(skip...)
1829 memcpy (data + i * bpf + reorder_map[j] * bps, ptr + j * bps, bps);
is processed and makes this issue.
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|---|---|---|
| .. | ||
| .gitignore | ||
| audio-buffer.c | ||
| audio-buffer.h | ||
| audio-channel-mixer.c | ||
| audio-channel-mixer.h | ||
| audio-channels.c | ||
| audio-channels.h | ||
| audio-converter.c | ||
| audio-converter.h | ||
| audio-format.c | ||
| audio-format.h | ||
| audio-info.c | ||
| audio-info.h | ||
| audio-prelude.h | ||
| audio-quantize.c | ||
| audio-quantize.h | ||
| audio-resampler-macros.h | ||
| audio-resampler-neon.h | ||
| audio-resampler-private.h | ||
| audio-resampler-x86-sse.c | ||
| audio-resampler-x86-sse.h | ||
| audio-resampler-x86-sse2.c | ||
| audio-resampler-x86-sse2.h | ||
| audio-resampler-x86-sse41.c | ||
| audio-resampler-x86-sse41.h | ||
| audio-resampler-x86.h | ||
| audio-resampler.c | ||
| audio-resampler.h | ||
| audio.c | ||
| audio.h | ||
| dbesi0.c | ||
| gstaudioaggregator.c | ||
| gstaudioaggregator.h | ||
| gstaudiobasesink.c | ||
| gstaudiobasesink.h | ||
| gstaudiobasesrc.c | ||
| gstaudiobasesrc.h | ||
| gstaudiocdsrc.c | ||
| gstaudiocdsrc.h | ||
| gstaudioclock.c | ||
| gstaudioclock.h | ||
| gstaudiodecoder.c | ||
| gstaudiodecoder.h | ||
| gstaudioencoder.c | ||
| gstaudioencoder.h | ||
| gstaudiofilter.c | ||
| gstaudiofilter.h | ||
| gstaudioiec61937.c | ||
| gstaudioiec61937.h | ||
| gstaudiometa.c | ||
| gstaudiometa.h | ||
| gstaudiopack-dist.c | ||
| gstaudiopack-dist.h | ||
| gstaudiopack.orc | ||
| gstaudioringbuffer.c | ||
| gstaudioringbuffer.h | ||
| gstaudiosink.c | ||
| gstaudiosink.h | ||
| gstaudiosrc.c | ||
| gstaudiosrc.h | ||
| gstaudiostreamalign.c | ||
| gstaudiostreamalign.h | ||
| gstaudioutilsprivate.c | ||
| gstaudioutilsprivate.h | ||
| Makefile.am | ||
| meson.build | ||
| streamvolume.c | ||
| streamvolume.h | ||
| TODO | ||