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amcaudiodec: Calculate number of samples per frame for MP3 and use that

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Some audio decoders (at least the MP3 decoder on MTK based devices) outputs
raw audio in batches of multiple audio frames. We need to handle that
properly, otherwise the base class will be kind of unhappy.
This commit is contained in:
Sebastian Dröge 2014-02-14 12:39:06 +01:00
parent aeeeedd7c7
commit 5b23cf694c
2 changed files with 33 additions and 5 deletions
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37
sys/androidmedia/gstamcaudiodec.c
View file

@ -612,6 +612,7 @@ retry:
GstBuffer *outbuf;
GstAmcBuffer *buf;
GstMapInfo minfo;
gint nframes;
/* This sometimes happens at EOS or if the input is not properly framed,
* let's handle it gracefully by allocating a new buffer for the current
@ -661,12 +662,18 @@ retry:
}
gst_buffer_unmap (outbuf, &minfo);
/* FIXME: We should get one decoded input frame here for
* every buffer. If this is not the case somewhere, we will
* error out at some point and will need to add workarounds
*/
nframes = 1;
if (self->spf != -1) {
nframes = buffer_info.size / self->info.bpf;
if (nframes % self->spf != 0)
GST_WARNING_OBJECT (self, "Output buffer does not contain an integer "
"number of input frames (frames: %d, spf: %d)", nframes, self->spf);
nframes = (nframes + self->spf - 1) / self->spf;
}
flow_ret =
gst_audio_decoder_finish_frame (GST_AUDIO_DECODER (self), outbuf, 1);
gst_audio_decoder_finish_frame (GST_AUDIO_DECODER (self), outbuf,
nframes);
}
done:
@ -1008,6 +1015,26 @@ gst_amc_audio_dec_set_format (GstAudioDecoder * decoder, GstCaps * caps)
return FALSE;
}
self->spf = -1;
/* TODO: Implement for other codecs too */
if (gst_structure_has_name (s, "audio/mpeg")) {
gint mpegversion = -1;
gst_structure_get_int (s, "mpegversion", &mpegversion);
if (mpegversion == 1) {
gint layer = -1, mpegaudioversion = -1;
gst_structure_get_int (s, "layer", &layer);
gst_structure_get_int (s, "mpegaudioversion", &mpegaudioversion);
if (layer == 1)
self->spf = 384;
else if (layer == 2)
self->spf = 1152;
else if (layer == 3 && mpegaudioversion != -1)
self->spf = (mpegaudioversion == 1 ? 1152 : 576);
}
}
self->started = TRUE;
self->input_caps_changed = TRUE;

1
sys/androidmedia/gstamcaudiodec.h
View file

@ -57,6 +57,7 @@ struct _GstAmcAudioDec
GstCaps *input_caps;
GList *codec_datas;
gboolean input_caps_changed;
gint spf;
/* Output format of the codec */
GstAudioInfo info;