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aiffmux: write padding byte at end of SSND chunk if needed

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AIFF chunks are supposed to be even aligned.

Aligning the SSND chunk will allow the aiff muxer to properly write
chunks (like the ID3 one) at the end of the file.

https://bugzilla.gnome.org/show_bug.cgi?id=727402
This commit is contained in:
Matthieu Bouron 2014-03-26 17:43:33 +00:00 committed by Stefan Sauer
parent 2b59d8ab7c
commit 6716671762
1 changed files with 27 additions and 3 deletions
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30
gst/aiff/aiffmux.c
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@ -132,12 +132,19 @@ static void
gst_aiff_mux_write_form_header (GstAiffMux * aiffmux, guint32 audio_data_size,
GstByteWriter * writer)
{
guint64 cur_size;
/* ckID == 'FORM' */
gst_byte_writer_put_uint32_le_unchecked (writer,
GST_MAKE_FOURCC ('F', 'O', 'R', 'M'));
/* ckSize is currently bogus but we'll know what it is later */
gst_byte_writer_put_uint32_be_unchecked (writer,
audio_data_size + AIFF_HEADER_LEN - 8);
/* AIFF chunks must be even aligned */
cur_size = AIFF_HEADER_LEN - 8 + audio_data_size;
if ((cur_size & 1) && cur_size + 1 < G_MAXUINT32) {
cur_size += 1;
}
gst_byte_writer_put_uint32_be_unchecked (writer, cur_size);
/* formType == 'AIFF' */
gst_byte_writer_put_uint32_le_unchecked (writer,
GST_MAKE_FOURCC ('A', 'I', 'F', 'F'));
@ -395,8 +402,25 @@ gst_aiff_mux_event (GstPad * pad, GstObject * parent, GstEvent * event)
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:{
guint64 cur_size;
GST_DEBUG_OBJECT (aiffmux, "got EOS");
cur_size = aiffmux->length + AIFF_HEADER_LEN - 8;
/* ID3 chunk must be even aligned */
if ((aiffmux->length & 1) && cur_size + 1 < G_MAXUINT32) {
GstFlowReturn ret;
guint8 *data = g_new0 (guint8, 1);
GstBuffer *buffer = gst_buffer_new_wrapped (data, 1);
GST_BUFFER_OFFSET (buffer) = AIFF_HEADER_LEN + aiffmux->length;
GST_BUFFER_OFFSET_END (buffer) = GST_BUFFER_OFFSET_NONE;
ret = gst_pad_push (aiffmux->srcpad, buffer);
if (ret != GST_FLOW_OK) {
GST_WARNING_OBJECT (aiffmux, "failed to push padding byte: %s",
gst_flow_get_name (ret));
}
}
/* write header with correct length values */
gst_aiff_mux_push_header (aiffmux, aiffmux->length);