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mssdemux: parse the fps from h264 codec data if possible

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Use h264 codec parsing lib to extract the fps from the manifest's
codec data as it doesn't seem to provide it anywhere else
This commit is contained in:
Thiago Santos 2012-12-20 14:27:58 -03:00
parent af4c690995
commit 68d2719c9f
2 changed files with 33 additions and 14 deletions
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4
ext/smoothstreaming/Makefile.am
View file

@ -2,8 +2,10 @@
plugin_LTLIBRARIES = libgstsmoothstreaming.la
libgstsmoothstreaming_la_CFLAGS = $(GST_PLUGINS_BAD_CFLAGS) \
$(GST_PLUGINS_BASE_CFLAGS) $(GST_BASE_CFLAGS) $(GST_CFLAGS)
$(GST_PLUGINS_BASE_CFLAGS) $(GST_BASE_CFLAGS) $(GST_CFLAGS) \
-DGST_USE_UNSTABLE_API
libgstsmoothstreaming_la_LIBADD = \
$(top_builddir)/gst-libs/gst/codecparsers/libgstcodecparsers-$(GST_MAJORMINOR).la \
$(top_builddir)/gst-libs/gst/uridownloader/libgsturidownloader-$(GST_MAJORMINOR).la \
$(GST_PLUGINS_BASE_LIBS) \
-lgsttag-@GST_MAJORMINOR@ \

43
ext/smoothstreaming/gstmssmanifest.c
View file

@ -25,6 +25,9 @@
#include <libxml/parser.h>
#include <libxml/tree.h>
/* for parsing h264 codec data */
#include <gst/codecparsers/gsth264parser.h>
#include "gstmssmanifest.h"
#define MSS_NODE_STREAM_FRAGMENT "c"
@ -293,8 +296,8 @@ _make_h264_codec_data (GstBuffer * sps, GstBuffer * pps)
return buf;
}
static GstBuffer *
_gst_mss_stream_create_h264_codec_data (const gchar * codecdatastr)
static void
_gst_mss_stream_add_h264_codec_data (GstCaps * caps, const gchar * codecdatastr)
{
GValue sps_value = { 0, };
GValue pps_value = { 0, };
@ -303,18 +306,21 @@ _gst_mss_stream_create_h264_codec_data (const gchar * codecdatastr)
GstBuffer *buffer;
gchar *sps_str;
gchar *pps_str;
GstH264NalUnit nalu;
GstH264SPS sps_struct;
GstH264ParserResult parseres;
/* search for the sps start */
if (g_str_has_prefix (codecdatastr, "00000001")) {
sps_str = (gchar *) codecdatastr + 8;
} else {
return NULL; /* invalid mss codec data */
return; /* invalid mss codec data */
}
/* search for the pps start */
pps_str = g_strstr_len (sps_str, -1, "00000001");
if (!pps_str) {
return NULL; /* invalid mss codec data */
return; /* invalid mss codec data */
}
g_value_init (&sps_value, GST_TYPE_BUFFER);
@ -329,11 +335,26 @@ _gst_mss_stream_create_h264_codec_data (const gchar * codecdatastr)
sps = gst_value_get_buffer (&sps_value);
pps = gst_value_get_buffer (&pps_value);
nalu.ref_idc = (GST_BUFFER_DATA (sps)[0] & 0x60) >> 5;
nalu.type = GST_H264_NAL_SPS;
nalu.size = GST_BUFFER_SIZE (sps);
nalu.data = GST_BUFFER_DATA (sps);
nalu.offset = 0;
nalu.sc_offset = 0;
nalu.valid = TRUE;
parseres = gst_h264_parse_sps (&nalu, &sps_struct, TRUE);
if (parseres == GST_H264_PARSER_OK) {
gst_caps_set_simple (caps, "framerate", GST_TYPE_FRACTION,
sps_struct.fps_num, sps_struct.fps_den, NULL);
}
buffer = _make_h264_codec_data (sps, pps);
g_value_reset (&sps_value);
g_value_reset (&pps_value);
return buffer;
gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER, buffer, NULL);
gst_buffer_unref (buffer);
}
static GstCaps *
@ -360,18 +381,14 @@ _gst_mss_stream_video_caps_from_qualitylevel_xml (xmlNodePtr node)
NULL);
if (codec_data) {
GValue *value = g_new0 (GValue, 1);
g_value_init (value, GST_TYPE_BUFFER);
if (strcmp (fourcc, "H264") == 0) {
GstBuffer *buf = _gst_mss_stream_create_h264_codec_data (codec_data);
gst_value_take_buffer (value, buf);
_gst_mss_stream_add_h264_codec_data (caps, codec_data);
} else {
GValue *value = g_new0 (GValue, 1);
g_value_init (value, GST_TYPE_BUFFER);
gst_value_deserialize (value, (gchar *) codec_data);
gst_structure_take_value (structure, "codec_data", value);
}
gst_structure_take_value (structure, "codec_data", value);
}
end: