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mpegaudioparse: use metadata (xing, vbri) provided bytesize for conversions

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Metadata provided seek tables are consistent with metadata's view of
total size, which typically matches real size, but need not do so
(e.g. a truncated file).  Fixes seeking and position reporting
in such truncated files (although duration based on metadata may then
still be incorrect).
This commit is contained in:
Mark Nauwelaerts 2009-08-14 12:07:40 +02:00
parent ba49058ea9
commit 52f6764e4c
1 changed files with 16 additions and 2 deletions
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18
gst/mpegaudioparse/gstmpegaudioparse.c
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@ -1620,6 +1620,9 @@ mp3parse_time_to_bytepos (GstMPEGAudioParse * mp3parse, GstClockTime ts,
gst_util_guint64_to_gdouble (total_time), 0.0, 100.0);
gint index = CLAMP (percent, 0, 99);
/* xing indicated size is preferred over e.g. truncated file size */
if (mp3parse->xing_bytes)
total_bytes = mp3parse->xing_bytes;
fa = mp3parse->xing_seek_table[index];
if (index < 99)
fb = mp3parse->xing_seek_table[index + 1];
@ -1639,6 +1642,9 @@ mp3parse_time_to_bytepos (GstMPEGAudioParse * mp3parse, GstClockTime ts,
gint i, j;
gdouble a, b, fa, fb;
/* header indicated size is preferred over e.g. truncated file size */
if (mp3parse->vbri_bytes)
total_bytes = mp3parse->vbri_bytes;
i = gst_util_uint64_scale (ts, mp3parse->vbri_seek_points - 1, total_time);
i = CLAMP (i, 0, mp3parse->vbri_seek_points - 1);
@ -1695,9 +1701,14 @@ mp3parse_bytepos_to_time (GstMPEGAudioParse * mp3parse,
mp3parse_total_bytes (mp3parse, &total_bytes) &&
mp3parse_total_time (mp3parse, &total_time)) {
gdouble fa, fb, fx;
gdouble pos = CLAMP ((bytepos * 256.0) / total_bytes, 0.0, 256.0);
gint index = CLAMP (pos, 0, 255);
gdouble pos;
gint index;
/* xing indicated size is preferred over e.g. truncated file size */
if (mp3parse->xing_bytes)
total_bytes = mp3parse->xing_bytes;
pos = CLAMP ((bytepos * 256.0) / total_bytes, 0.0, 256.0);
index = CLAMP (pos, 0, 255);
fa = mp3parse->xing_seek_table_inverse[index];
if (index < 255)
fb = mp3parse->xing_seek_table_inverse[index + 1];
@ -1718,6 +1729,9 @@ mp3parse_bytepos_to_time (GstMPEGAudioParse * mp3parse,
guint64 sum = 0;
gdouble a, b, fa, fb;
/* header indicated size is preferred over e.g. truncated file size */
if (mp3parse->vbri_bytes)
total_bytes = mp3parse->vbri_bytes;
do {
sum += mp3parse->vbri_seek_table[i];
i++;