/**
* gst_amrparse_sink_setcaps:
* @sinkpad: GstPad
* @caps: GstCaps
*
* Returns: TRUE on success.
*/
static gboolean
gst_amrparse_sink_setcaps (GstBaseParse * parse, GstCaps * caps)
{
GstAmrParse *amrparse;
GstStructure *structure;
const gchar *name;
amrparse = GST_AMRPARSE (parse);
structure = gst_caps_get_structure (caps, 0);
name = gst_structure_get_name (structure);
GST_DEBUG_OBJECT (amrparse, "setcaps: %s", name);
if (!strncmp (name, "audio/x-amr-wb-sh", 17)) {
amrparse->block_size = block_size_wb;
amrparse->wide = 1;
} else if (!strncmp (name, "audio/x-amr-nb-sh", 17)) {
amrparse->block_size = block_size_nb;
amrparse->wide = 0;
} else {
GST_WARNING ("Unknown caps");
return FALSE;
}
amrparse->need_header = FALSE;
gst_base_parse_set_frame_props (GST_BASE_PARSE (amrparse), 50, 1, 2, 2);
gst_amrparse_set_src_caps (amrparse);
return TRUE;
}
/**
* gst_amrparse_check_valid_frame:
* @parse: #GstBaseParse.
* @buffer: #GstBuffer.
* @framesize: Output variable where the found frame size is put.
* @skipsize: Output variable which tells how much data needs to be skipped
* until a frame header is found.
*
* Implementation of "check_valid_frame" vmethod in #GstBaseParse class.
*
* Returns: TRUE if the given data contains valid frame.
*/
gboolean
gst_amrparse_check_valid_frame (GstBaseParse * parse,
GstBuffer * buffer, guint * framesize, gint * skipsize)
{
const guint8 *data;
gint fsize, mode, dsize;
GstAmrParse *amrparse;
amrparse = GST_AMRPARSE (parse);
data = GST_BUFFER_DATA (buffer);
dsize = GST_BUFFER_SIZE (buffer);
GST_LOG ("buffer: %d bytes", dsize);
if (amrparse->need_header) {
if (dsize >= AMR_MIME_HEADER_SIZE &&
gst_amrparse_parse_header (amrparse, data, skipsize)) {
amrparse->need_header = FALSE;
gst_base_parse_set_frame_props (GST_BASE_PARSE (amrparse), 50, 1, 2, 2);
} else {
GST_WARNING ("media doesn't look like a AMR format");
}
/* We return FALSE, so this frame won't get pushed forward. Instead,
the "skip" value is set, so next time we will receive a valid frame. */
return FALSE;
}
/* Does this look like a possible frame header candidate? */
if ((data[0] & 0x83) == 0) {
/* Yep. Retrieve the frame size */
mode = (data[0] >> 3) & 0x0F;
fsize = amrparse->block_size[mode] + 1; /* +1 for the header byte */
/* We recognize this data as a valid frame when:
* - We are in sync. There is no need for extra checks then
* - We are in EOS. There might not be enough data to check next frame
* - Sync is lost, but the following data after this frame seem
* to contain a valid header as well (and there is enough data to
* perform this check)
*/
if (gst_base_parse_get_sync (parse) || gst_base_parse_get_drain (parse) ||
(dsize >= fsize && (data[fsize] & 0x83) == 0)) {
*framesize = fsize;
return TRUE;
}
}
static void
gst_h264_parse_update_src_caps (GstH264Parse * h264parse)
{
GstH264ParamsSPS *sps;
GstCaps *caps = NULL, *sink_caps;
gboolean modified = FALSE;
GstBuffer *buf = NULL;
if (G_UNLIKELY (!GST_PAD_CAPS (GST_BASE_PARSE_SRC_PAD (h264parse))))
modified = TRUE;
else if (G_UNLIKELY (!h264parse->update_caps))
return;
/* carry over input caps as much as possible; override with our own stuff */
sink_caps = GST_PAD_CAPS (GST_BASE_PARSE_SINK_PAD (h264parse));
if (sink_caps)
gst_caps_ref (sink_caps);
else
sink_caps = gst_caps_new_simple ("video/x-h264", NULL);
sps = h264parse->params->sps;
GST_DEBUG_OBJECT (h264parse, "sps: %p", sps);
/* only codec-data for nice-and-clean au aligned packetized avc format */
if (h264parse->format == GST_H264_PARSE_FORMAT_AVC &&
h264parse->align == GST_H264_PARSE_ALIGN_AU) {
buf = gst_h264_parse_make_codec_data (h264parse);
if (buf && h264parse->codec_data) {
if (GST_BUFFER_SIZE (buf) != GST_BUFFER_SIZE (h264parse->codec_data) ||
memcmp (GST_BUFFER_DATA (buf),
GST_BUFFER_DATA (h264parse->codec_data), GST_BUFFER_SIZE (buf)))
modified = TRUE;
} else {
if (h264parse->codec_data)
buf = gst_buffer_ref (h264parse->codec_data);
modified = TRUE;
}
}
if (G_UNLIKELY (!sps)) {
caps = gst_caps_copy (sink_caps);
} else if (G_UNLIKELY (h264parse->width != sps->width ||
h264parse->height != sps->height || h264parse->fps_num != sps->fps_num
|| h264parse->fps_den != sps->fps_den || modified)) {
caps = gst_caps_copy (sink_caps);
/* sps should give this */
gst_caps_set_simple (caps, "width", G_TYPE_INT, sps->width,
"height", G_TYPE_INT, sps->height, NULL);
h264parse->height = sps->height;
h264parse->width = sps->width;
/* but not necessarily or reliably this */
if ((!h264parse->fps_num || !h264parse->fps_den) &&
sps->fps_num > 0 && sps->fps_den > 0) {
gst_caps_set_simple (caps, "framerate",
GST_TYPE_FRACTION, sps->fps_num, sps->fps_den, NULL);
h264parse->fps_num = sps->fps_num;
h264parse->fps_den = sps->fps_den;
gst_base_parse_set_frame_props (GST_BASE_PARSE (h264parse),
h264parse->fps_num, h264parse->fps_den, 0, 0);
}
}
if (caps) {
gst_caps_set_simple (caps, "parsed", G_TYPE_BOOLEAN, TRUE,
"stream-format", G_TYPE_STRING,
gst_h264_parse_get_string (h264parse, TRUE, h264parse->format),
"alignment", G_TYPE_STRING,
gst_h264_parse_get_string (h264parse, FALSE, h264parse->align), NULL);
if (buf) {
gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER, buf, NULL);
gst_buffer_replace (&h264parse->codec_data, buf);
gst_buffer_unref (buf);
buf = NULL;
} else {
GstStructure *s;
/* remove any left-over codec-data hanging around */
s = gst_caps_get_structure (caps, 0);
gst_structure_remove_field (s, "codec_data");
}
gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (h264parse), caps);
gst_caps_unref (caps);
}
gst_caps_unref (sink_caps);
if (buf)
gst_buffer_unref (buf);
}
