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dcaparse: Expose block size in caps

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This sets the "block_size" field on caps as the number of samples
encoded in one frame.
This commit is contained in:
Arun Raghavan 2011-03-09 23:03:10 +05:30
parent c558a066fb
commit e83f53dbed
2 changed files with 31 additions and 19 deletions
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49
gst/audioparsers/gstdcaparse.c
View file

@ -120,6 +120,7 @@ gst_dca_parse_reset (GstDcaParse * dcaparse)
dcaparse->rate = -1;
dcaparse->depth = -1;
dcaparse->endianness = -1;
dcaparse->block_size = -1;
dcaparse->last_sync = 0;
}
@ -161,7 +162,8 @@ static gboolean
gst_dca_parse_parse_header (GstDcaParse * dcaparse,
const GstByteReader * reader, guint * frame_size,
guint * sample_rate, guint * channels, guint * depth,
gint * endianness, guint * samples)
gint * endianness, guint * num_blocks, guint * samples_per_block,
gboolean * terminator)
{
static const int sample_rates[16] = { 0, 8000, 16000, 32000, 0, 0, 11025,
22050, 44100, 0, 0, 12000, 24000, 48000, 96000, 192000
@ -172,7 +174,7 @@ gst_dca_parse_parse_header (GstDcaParse * dcaparse,
GstByteReader r = *reader;
guint16 hdr[8];
guint32 marker;
guint num_blocks, samples_per_block, chans, lfe, i;
guint chans, lfe, i;
if (gst_byte_reader_get_remaining (&r) < (4 + sizeof (hdr)))
return FALSE;
@ -214,18 +216,19 @@ gst_dca_parse_parse_header (GstDcaParse * dcaparse,
GST_LOG_OBJECT (dcaparse, "frame header: %04x%04x%04x%04x",
hdr[2], hdr[3], hdr[4], hdr[5]);
samples_per_block = ((hdr[2] >> 10) & 0x1f) + 1;
num_blocks = ((hdr[2] >> 2) & 0x7F) + 1;
*terminator = (hdr[2] & 0x80) ? FALSE : TRUE;
*samples_per_block = ((hdr[2] >> 10) & 0x1f) + 1;
*num_blocks = ((hdr[2] >> 2) & 0x7F) + 1;
*frame_size = (((hdr[2] & 0x03) << 12) | (hdr[3] >> 4)) + 1;
chans = ((hdr[3] & 0x0F) << 2) | (hdr[4] >> 14);
*sample_rate = sample_rates[(hdr[4] >> 10) & 0x0F];
lfe = (hdr[5] >> 9) & 0x03;
GST_TRACE_OBJECT (dcaparse, "frame size %u, num_blocks %u, rate %u, "
"samples per block %u", *frame_size, num_blocks, *sample_rate,
samples_per_block);
"samples per block %u", *frame_size, *num_blocks, *sample_rate,
*samples_per_block);
if (num_blocks < 6 || *frame_size < 96 || *sample_rate == 0)
if (*num_blocks < 6 || *frame_size < 96 || *sample_rate == 0)
return FALSE;
if (marker == 0x1FFFE800 || marker == 0xFF1F00E8)
@ -242,10 +245,10 @@ gst_dca_parse_parse_header (GstDcaParse * dcaparse,
*endianness = (marker == 0xFE7F0180 || marker == 0xFF1F00E8) ?
G_LITTLE_ENDIAN : G_BIG_ENDIAN;
*samples = num_blocks * samples_per_block;
GST_TRACE_OBJECT (dcaparse, "frame size %u, channels %u, rate %u, "
"num_blocks %u, samples_per_block %u", *frame_size, *channels,
*sample_rate, *num_blocks, *samples_per_block);
GST_TRACE_OBJECT (dcaparse, "frame size %u, channels %u, rate %u, samples %u",
*frame_size, *channels, *sample_rate, *samples);
return TRUE;
}
@ -310,8 +313,9 @@ gst_dca_parse_check_valid_frame (GstBaseParse * parse,
GstByteReader r = GST_BYTE_READER_INIT_FROM_BUFFER (buf);
gboolean parser_draining;
gboolean parser_in_sync;
gboolean terminator;
guint32 sync = 0;
guint size, rate, chans, samples;
guint size, rate, chans, num_blocks, samples_per_block;
gint off = -1;
if (G_UNLIKELY (GST_BUFFER_SIZE (buf) < 16))
@ -345,7 +349,7 @@ gst_dca_parse_check_valid_frame (GstBaseParse * parse,
/* make sure the values in the frame header look sane */
if (!gst_dca_parse_parse_header (dcaparse, &r, &size, &rate, &chans, NULL,
NULL, &samples)) {
NULL, &num_blocks, &samples_per_block, &terminator)) {
*skipsize = 4;
return FALSE;
}
@ -363,14 +367,15 @@ gst_dca_parse_check_valid_frame (GstBaseParse * parse,
/* check for second frame to be sure */
GST_DEBUG_OBJECT (dcaparse, "resyncing; checking next frame syncword");
if (GST_BUFFER_SIZE (buf) >= (size + 16)) {
guint s2, r2, c2, n2;
guint s2, r2, c2, n2, s3;
gboolean t;
GST_MEMDUMP ("buf", GST_BUFFER_DATA (buf), size + 16);
gst_byte_reader_init_from_buffer (&r, buf);
gst_byte_reader_skip_unchecked (&r, size);
if (!gst_dca_parse_parse_header (dcaparse, &r, &s2, &r2, &c2, NULL, NULL,
&n2)) {
&n2, &s3, &t)) {
GST_DEBUG_OBJECT (dcaparse, "didn't find second syncword");
*skipsize = 4;
return FALSE;
@ -397,21 +402,26 @@ gst_dca_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
GstDcaParse *dcaparse = GST_DCA_PARSE (parse);
GstBuffer *buf = frame->buffer;
GstByteReader r = GST_BYTE_READER_INIT_FROM_BUFFER (buf);
guint size, rate, chans, depth, samples;
guint size, rate, chans, depth, block_size, num_blocks, samples_per_block;
gint endianness;
gboolean terminator;
if (!gst_dca_parse_parse_header (dcaparse, &r, &size, &rate, &chans, &depth,
&endianness, &samples))
&endianness, &num_blocks, &samples_per_block, &terminator))
goto broken_header;
block_size = num_blocks * samples_per_block;
if (G_UNLIKELY (dcaparse->rate != rate || dcaparse->channels != chans
|| dcaparse->depth != depth || dcaparse->endianness != endianness)) {
|| dcaparse->depth != depth || dcaparse->endianness != endianness
|| (!terminator && dcaparse->block_size != block_size))) {
GstCaps *caps;
caps = gst_caps_new_simple ("audio/x-dts",
"framed", G_TYPE_BOOLEAN, TRUE,
"rate", G_TYPE_INT, rate, "channels", G_TYPE_INT, chans,
"endianness", G_TYPE_INT, endianness, "depth", G_TYPE_INT, depth, NULL);
"endianness", G_TYPE_INT, endianness, "depth", G_TYPE_INT, depth,
"block-size", G_TYPE_INT, block_size, NULL);
gst_buffer_set_caps (buf, caps);
gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (parse), caps);
gst_caps_unref (caps);
@ -420,8 +430,9 @@ gst_dca_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
dcaparse->channels = chans;
dcaparse->depth = depth;
dcaparse->endianness = endianness;
dcaparse->block_size = block_size;
gst_base_parse_set_frame_props (parse, rate, samples, 0, 0);
gst_base_parse_set_frame_props (parse, rate, block_size, 0, 0);
}
return GST_FLOW_OK;

1
gst/audioparsers/gstdcaparse.h
View file

@ -55,6 +55,7 @@ struct _GstDcaParse {
gint channels;
gint depth;
gint endianness;
gint block_size;
guint32 last_sync;
};