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mssdemux: correctly add h264 codec data to caps

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Need to construct an avcc atom from the codecdata read from MSS
manifests to make h264 decoders/parsers accept it
This commit is contained in:
Thiago Santos 2012-12-20 01:09:05 -03:00
parent edea61b758
commit af4c690995
1 changed files with 98 additions and 2 deletions
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100
ext/smoothstreaming/gstmssmanifest.c
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@ -230,7 +230,8 @@ _gst_mss_stream_video_caps_from_fourcc (gchar * fourcc)
return NULL;
if (strcmp (fourcc, "H264") == 0) {
return gst_caps_new_simple ("video/x-h264", NULL);
return gst_caps_new_simple ("video/x-h264", "stream-format", G_TYPE_STRING,
"avc", NULL);
}
return NULL;
}
@ -248,6 +249,93 @@ _gst_mss_stream_audio_caps_from_fourcc (gchar * fourcc)
return NULL;
}
/* copied and adapted from h264parse */
static GstBuffer *
_make_h264_codec_data (GstBuffer * sps, GstBuffer * pps)
{
GstBuffer *buf;
gint sps_size = 0, pps_size = 0, num_sps = 0, num_pps = 0;
guint8 profile_idc = 0, profile_comp = 0, level_idc = 0;
guint8 *data;
gint nl;
sps_size += GST_BUFFER_SIZE (sps) + 2;
profile_idc = GST_BUFFER_DATA (sps)[1];
profile_comp = GST_BUFFER_DATA (sps)[2];
level_idc = GST_BUFFER_DATA (sps)[3];
num_sps = 1;
pps_size += GST_BUFFER_SIZE (pps) + 2;
num_pps = 1;
buf = gst_buffer_new_and_alloc (5 + 1 + sps_size + 1 + pps_size);
data = GST_BUFFER_DATA (buf);
nl = 4;
data[0] = 1; /* AVC Decoder Configuration Record ver. 1 */
data[1] = profile_idc; /* profile_idc */
data[2] = profile_comp; /* profile_compability */
data[3] = level_idc; /* level_idc */
data[4] = 0xfc | (nl - 1); /* nal_length_size_minus1 */
data[5] = 0xe0 | num_sps; /* number of SPSs */
data += 6;
GST_WRITE_UINT16_BE (data, GST_BUFFER_SIZE (sps));
memcpy (data + 2, GST_BUFFER_DATA (sps), GST_BUFFER_SIZE (sps));
data += 2 + GST_BUFFER_SIZE (sps);
data[0] = num_pps;
data++;
GST_WRITE_UINT16_BE (data, GST_BUFFER_SIZE (pps));
memcpy (data + 2, GST_BUFFER_DATA (pps), GST_BUFFER_SIZE (pps));
data += 2 + GST_BUFFER_SIZE (pps);
return buf;
}
static GstBuffer *
_gst_mss_stream_create_h264_codec_data (const gchar * codecdatastr)
{
GValue sps_value = { 0, };
GValue pps_value = { 0, };
GstBuffer *sps;
GstBuffer *pps;
GstBuffer *buffer;
gchar *sps_str;
gchar *pps_str;
/* search for the sps start */
if (g_str_has_prefix (codecdatastr, "00000001")) {
sps_str = (gchar *) codecdatastr + 8;
} else {
return NULL; /* 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 */
}
g_value_init (&sps_value, GST_TYPE_BUFFER);
pps_str[0] = '\0';
gst_value_deserialize (&sps_value, sps_str);
pps_str[0] = '0';
g_value_init (&pps_value, GST_TYPE_BUFFER);
pps_str = pps_str + 8;
gst_value_deserialize (&pps_value, pps_str);
sps = gst_value_get_buffer (&sps_value);
pps = gst_value_get_buffer (&pps_value);
buffer = _make_h264_codec_data (sps, pps);
g_value_reset (&sps_value);
g_value_reset (&pps_value);
return buffer;
}
static GstCaps *
_gst_mss_stream_video_caps_from_qualitylevel_xml (xmlNodePtr node)
{
@ -274,7 +362,15 @@ _gst_mss_stream_video_caps_from_qualitylevel_xml (xmlNodePtr node)
if (codec_data) {
GValue *value = g_new0 (GValue, 1);
g_value_init (value, GST_TYPE_BUFFER);
gst_value_deserialize (value, (gchar *) codec_data);
if (strcmp (fourcc, "H264") == 0) {
GstBuffer *buf = _gst_mss_stream_create_h264_codec_data (codec_data);
gst_value_take_buffer (value, buf);
} else {
gst_value_deserialize (value, (gchar *) codec_data);
}
gst_structure_take_value (structure, "codec_data", value);
}