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[packages/trusty/cirros-testvm.git] / cirros-testvm / src-cirros / buildroot-2015.05 / package / ffmpeg / 0007-Read-PID-timestamps-as-well-as-PCR-timestamps-to-fin.patch

diff --git a/cirros-testvm/src-cirros/buildroot-2015.05/package/ffmpeg/0007-Read-PID-timestamps-as-well-as-PCR-timestamps-to-fin.patch b/cirros-testvm/src-cirros/buildroot-2015.05/package/ffmpeg/0007-Read-PID-timestamps-as-well-as-PCR-timestamps-to-fin.patch
new file mode 100644 (file)
index 0000000..259b359
--- /dev/null
+++ b/cirros-testvm/src-cirros/buildroot-2015.05/package/ffmpeg/0007-Read-PID-timestamps-as-well-as-PCR-timestamps-to-fin.patch
@@ -0,0 +1,105 @@
+From fdd8caea6535434a877587f5325e914ba50ed17f Mon Sep 17 00:00:00 2001
+From: Cory Fields <theuni-nospam-@xbmc.org>
+Date: Fri, 9 Jul 2010 16:43:31 -0400
+Subject: [PATCH 07/13] Read PID timestamps as well as PCR timestamps to find
+ location in mpegts stream
+
+Patch part of the XBMC patch set for ffmpeg, downloaded from
+https://github.com/xbmc/FFmpeg/.
+
+Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+---
+ libavformat/mpegts.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++--
+ 1 file changed, 46 insertions(+), 2 deletions(-)
+
+diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c
+index 25007a6..d5a8a45 100644
+--- a/libavformat/mpegts.c
++++ b/libavformat/mpegts.c
+@@ -2459,6 +2459,44 @@ static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
+         av_log(s, pb->seekable ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
+ }
+ 
++static int parse_timestamp(int64_t *ts, const uint8_t *buf)
++{
++    int afc, flags;
++    const uint8_t *p;
++
++    if(!(buf[1] & 0x40)) /* must be a start packet */
++        return -1;
++
++    afc = (buf[3] >> 4) & 3;
++    p = buf + 4;
++    if (afc == 0 || afc == 2) /* invalid or only adaption field */
++        return -1;
++    if (afc == 3)
++        p += p[0] + 1;
++    if (p >= buf + TS_PACKET_SIZE)
++        return -1;
++
++    if (p[0] != 0x00 || p[1] != 0x00 || p[2] != 0x01)  /* packet_start_code_prefix */
++        return -1;
++
++    flags = p[3] | 0x100; /* stream type */
++    if (!((flags >= 0x1c0 && flags <= 0x1df) ||
++          (flags >= 0x1e0 && flags <= 0x1ef) ||
++          (flags == 0x1bd) || (flags == 0x1fd)))
++        return -1;
++
++    flags = p[7];
++    if ((flags & 0xc0) == 0x80) {
++        *ts = ff_parse_pes_pts(p+9);
++        return 0;
++    } else if ((flags & 0xc0) == 0xc0) {
++        *ts = ff_parse_pes_pts(p+9+5);
++        return 0;
++    }
++    return -1;
++}
++
++
+ static int mpegts_read_header(AVFormatContext *s)
+ {
+     MpegTSContext *ts = s->priv_data;
+@@ -2658,6 +2696,7 @@ static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
+     uint8_t buf[TS_PACKET_SIZE];
+     int pcr_l, pcr_pid =
+         ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
++    int pid = ((PESContext*)s->streams[stream_index]->priv_data)->pid;
+     int pos47 = ts->pos47_full % ts->raw_packet_size;
+     pos =
+         ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
+@@ -2679,6 +2718,11 @@ static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
+             *ppos = pos;
+             return timestamp;
+         }
++        if ((pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pid) &&
++            parse_timestamp(&timestamp, buf) == 0) {
++            *ppos = pos;
++            return timestamp;
++        }
+         pos += ts->raw_packet_size;
+     }
+ 
+@@ -2778,7 +2822,7 @@ AVInputFormat ff_mpegts_demuxer = {
+     .read_header    = mpegts_read_header,
+     .read_packet    = mpegts_read_packet,
+     .read_close     = mpegts_read_close,
+-    .read_timestamp = mpegts_get_dts,
++    .read_timestamp = mpegts_get_pcr,
+     .flags          = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
+     .priv_class     = &mpegts_class,
+ };
+@@ -2790,7 +2834,7 @@ AVInputFormat ff_mpegtsraw_demuxer = {
+     .read_header    = mpegts_read_header,
+     .read_packet    = mpegts_raw_read_packet,
+     .read_close     = mpegts_read_close,
+-    .read_timestamp = mpegts_get_dts,
++    .read_timestamp = mpegts_get_pcr,
+     .flags          = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
+     .priv_class     = &mpegtsraw_class,
+ };
+-- 
+2.1.0
+