From 1db9aa8d234be14356289c032efc149763744eb8 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Sebastian=20Dr=C3=B6ge?= Date: Mon, 14 Jan 2008 09:13:29 +0000 Subject: [PATCH] gst/mpegaudioparse/gstmpegaudioparse.c: Guard against 0 values in the Xing header as frame count and byte count and c... Original commit message from CVS: * gst/mpegaudioparse/gstmpegaudioparse.c: (gst_mp3parse_handle_first_frame): Guard against 0 values in the Xing header as frame count and byte count and calculate the bitrate when we have all values we need and not before. --- ChangeLog | 8 +++++++ gst/mpegaudioparse/gstmpegaudioparse.c | 42 +++++++++++++++++++++++----------- 2 files changed, 37 insertions(+), 13 deletions(-) diff --git a/ChangeLog b/ChangeLog index 64b998c..75d0a61 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,11 @@ +2008-01-14 Sebastian Dröge + + * gst/mpegaudioparse/gstmpegaudioparse.c: + (gst_mp3parse_handle_first_frame): + Guard against 0 values in the Xing header as frame count and + byte count and calculate the bitrate when we have all values + we need and not before. + 2008-01-10 Tim-Philipp Müller * ext/mad/gstmad.c: (GST_TYPE_MAD_MODE), diff --git a/gst/mpegaudioparse/gstmpegaudioparse.c b/gst/mpegaudioparse/gstmpegaudioparse.c index 331a640..a75ea99 100644 --- a/gst/mpegaudioparse/gstmpegaudioparse.c +++ b/gst/mpegaudioparse/gstmpegaudioparse.c @@ -96,6 +96,8 @@ static gboolean mp3parse_bytepos_to_time (GstMPEGAudioParse * mp3parse, gint64 bytepos, GstClockTime * ts); static gboolean mp3parse_total_bytes (GstMPEGAudioParse * mp3parse, gint64 * total); +static gboolean +mp3parse_total_time (GstMPEGAudioParse * mp3parse, GstClockTime * total); /*static guint gst_mp3parse_signals[LAST_SIGNAL] = { 0 }; */ @@ -704,6 +706,8 @@ gst_mp3parse_handle_first_frame (GstMPEGAudioParse * mp3parse) if (read_id == xing_id || read_id == info_id) { guint32 xing_flags; guint bytes_needed = xing_offset + XING_HDR_MIN; + gint64 total_bytes; + GstClockTime total_time; GST_DEBUG_OBJECT (mp3parse, "Found Xing header marker 0x%x", xing_id); @@ -729,19 +733,15 @@ gst_mp3parse_handle_first_frame (GstMPEGAudioParse * mp3parse) data += xing_offset + XING_HDR_MIN; if (xing_flags & XING_FRAMES_FLAG) { - gint64 total_bytes; - mp3parse->xing_frames = GST_READ_UINT32_BE (data); - mp3parse->xing_total_time = gst_util_uint64_scale (GST_SECOND, - (guint64) (mp3parse->xing_frames) * (mp3parse->spf), mp3parse->rate); - - /* We know the total time. If we also know the upstream size, compute the - * total bitrate, rounded up to the nearest kbit/sec */ - if (mp3parse_total_bytes (mp3parse, &total_bytes)) { - mp3parse->xing_bitrate = gst_util_uint64_scale (total_bytes, - 8 * GST_SECOND, mp3parse->xing_total_time); - mp3parse->xing_bitrate += 500; - mp3parse->xing_bitrate -= mp3parse->xing_bitrate % 1000; + if (mp3parse->xing_frames == 0) { + GST_WARNING_OBJECT (mp3parse, + "Invalid number of frames in Xing header"); + mp3parse->xing_flags &= ~XING_FRAMES_FLAG; + } else { + mp3parse->xing_total_time = gst_util_uint64_scale (GST_SECOND, + (guint64) (mp3parse->xing_frames) * (mp3parse->spf), + mp3parse->rate); } data += 4; @@ -752,9 +752,25 @@ gst_mp3parse_handle_first_frame (GstMPEGAudioParse * mp3parse) if (xing_flags & XING_BYTES_FLAG) { mp3parse->xing_bytes = GST_READ_UINT32_BE (data); + if (mp3parse->xing_bytes == 0) { + GST_WARNING_OBJECT (mp3parse, "Invalid number of bytes in Xing header"); + mp3parse->xing_flags &= ~XING_BYTES_FLAG; + } + data += 4; - } else + } else { mp3parse->xing_bytes = 0; + } + + /* If we know the upstream size and duration, compute the + * total bitrate, rounded up to the nearest kbit/sec */ + if (mp3parse_total_time (mp3parse, &total_time) && + mp3parse_total_bytes (mp3parse, &total_bytes)) { + mp3parse->xing_bitrate = gst_util_uint64_scale (total_bytes, + 8 * GST_SECOND, total_time); + mp3parse->xing_bitrate += 500; + mp3parse->xing_bitrate -= mp3parse->xing_bitrate % 1000; + } if (xing_flags & XING_TOC_FLAG) { int i, percent = 0; -- 2.7.4