I am not so familiar with the buffer handling. Maybe the following codes
related? Who cam take a moment help me to find it out.My project is blocked
by it. Thanksif (gst_structure_has_field(structure, "codec_data")) {
extra_data_buf = (GValue *) gst_structure_get_value(structure, "codec_data");
if (extra_data_buf) { info->configdata =
gst_buffer_copy(gst_value_get_buffer(extra_data_buf));
AML_DUMP_BUFFER(info->configdata, "Audio Codec Data"); } }
==================== int extract_adts_header(StreamInfo *info,codec_para_t
*pcodec, GstBuffer *buffer) { adts_header_t hdr; guint8 *p = NULL;
guint8 *buf; GstMapInfo map; if (info->configdata) {
gst_buffer_map(info->configdata, &map, GST_MAP_READ); p =
map.data; hdr.profile = (*p >> 3) - 1;
hdr.sample_freq_idx = (*p & 0x7) << 1 | (*(p + 1) >> 7);
hdr.channel_configuration = (*(p + 1) & 0x7f) >> 3;
gst_buffer_unmap(info->configdata, &map); } else {
return 0; } hdr.syncword = 0xfff; hdr.id = 0;
hdr.layer = 0; hdr.protection_absent = 1; hdr.private_bit = 0;
hdr.original_copy = 0; hdr.home = 0; hdr.copyright_identification_bit = 0;
hdr.copyright_identification_start = 0; hdr.aac_frame_length = 0;
hdr.adts_buffer_fullness = 0x7ff; gst_buffer_map(buffer, &map,
GST_MAP_WRITE); buf = map.data; if (buf) { buf[0] =
(char) (hdr.syncword >> 4); buf[1] = (char) ((hdr.syncword & 0xf <<
4) ; buf[2] = (char) ((hdr.profile << 6) ; buf[3] = (char)
(((hdr.channel_configuration & 0x3) << 6)); buf[4] = (char)
((hdr.aac_frame_length >> 3) & 0xff); buf[5] = (char)
(((hdr.aac_frame_length & 0x7) << 5); buf[6] = (char)
(((hdr.adts_buffer_fullness & 0x3f) << 2);
gst_buffer_unmap(buffer, &map);
gst_buffer_unref(info->configdata);
info->configdata = gst_buffer_copy(buffer);
gst_buffer_set_size(info->configdata, ADTS_HEADER_SIZE); } else {
return -1; } return 0; }
================================= gint adts_startcode(StreamInfo* info,
codec_para_t *pcodec, GstBuffer *buffer) { gint8 *buf ; int i; int
size = ADTS_HEADER_SIZE + gst_buffer_get_size(buffer); // 13bit valid
size &= 0x1fff; guint8 *adts_header=NULL; GstBuffer *buffer1;
GstMapInfo map; if (!info->configdata) { return 0; }
while (buffer&&gst_buffer_get_size(buffer)>=ADTS_HEADER_SIZE) { buffer1
= gst_buffer_new_and_alloc(ADTS_HEADER_SIZE); if (buffer1) {
gst_buffer_copy_into(buffer1, buffer, GST_BUFFER_COPY_DEEP, 0,
ADTS_HEADER_SIZE); gst_buffer_map(buffer1, &map, GST_MAP_READ);
adts_header=map.data; //gst_buffer_unmap(buffer1, &map);
if (((adts_header[0] << 4) != 0xFFF)
break; if (((*(adts_header + 4) & 0xFF) << 3))
break; } else break;
GST_WARNING(" AAC es has adts header,don't add again");
gst_buffer_unmap(buffer1, &map); if(adts_header){
gst_buffer_unref(buffer1); buffer1=NULL; }
return 0; } if(adts_header){ gst_buffer_unmap(buffer1,
&map); gst_buffer_unref(buffer1); buffer1=NULL; }
gst_buffer_map(info->configdata, &map, GST_MAP_WRITE); buf =
map.data; if (buf!=NULL) { buf[3] = (buf[3] & 0xfc) | (size >> 11);
buf[4] = (size >> 3) & 0xff; buf[5] = ((size & 0x7) << 5);
if ( gst_buffer_get_size(info->configdata) == ADTS_HEADER_SIZE) {
codec_write(pcodec,buf,gst_buffer_get_size(info->configdata));
} } gst_buffer_unmap(info->configdata, &map); return
0; }
[reply] [−]Comment 7_______________________________________________
gstreamer-embedded mailing list
gstreamer-embedded@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/gstreamer-embedded
