diff options
Diffstat (limited to 'gst/rtp/gstrtpqdmdepay.c')
| -rw-r--r-- | gst/rtp/gstrtpqdmdepay.c | 419 |
1 files changed, 419 insertions, 0 deletions
diff --git a/gst/rtp/gstrtpqdmdepay.c b/gst/rtp/gstrtpqdmdepay.c new file mode 100644 index 0000000..0139709 --- /dev/null +++ b/gst/rtp/gstrtpqdmdepay.c @@ -0,0 +1,419 @@ +/* GStreamer + * Copyright (C) <2009> Edward Hervey <bilboed@bilboed.com> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <string.h> + +#include <gst/rtp/gstrtpbuffer.h> +#include "gstrtpqdmdepay.h" + +GST_DEBUG_CATEGORY (rtpqdm2depay_debug); +#define GST_CAT_DEFAULT rtpqdm2depay_debug + +static GstStaticPadTemplate gst_rtp_qdm2_depay_src_template = +GST_STATIC_PAD_TEMPLATE ("src", + GST_PAD_SRC, + GST_PAD_ALWAYS, + GST_STATIC_CAPS ("audio/x-qdm2") + ); + +static GstStaticPadTemplate gst_rtp_qdm2_depay_sink_template = +GST_STATIC_PAD_TEMPLATE ("sink", + GST_PAD_SINK, + GST_PAD_ALWAYS, + GST_STATIC_CAPS ("application/x-rtp, " + "media = (string) \"audio\", " + "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", " + "encoding-name = (string)\"X-QDM\"") + ); + +GST_BOILERPLATE (GstRtpQDM2Depay, gst_rtp_qdm2_depay, GstBaseRTPDepayload, + GST_TYPE_BASE_RTP_DEPAYLOAD); + +static const guint8 headheader[20] = { + 0x0, 0x0, 0x0, 0xc, 0x66, 0x72, 0x6d, 0x61, + 0x51, 0x44, 0x4d, 0x32, 0x0, 0x0, 0x0, 0x24, + 0x51, 0x44, 0x43, 0x41 +}; + +static void gst_rtp_qdm2_depay_finalize (GObject * object); + +static GstStateChangeReturn gst_rtp_qdm2_depay_change_state (GstElement * + element, GstStateChange transition); + +static GstBuffer *gst_rtp_qdm2_depay_process (GstBaseRTPDepayload * depayload, + GstBuffer * buf); +gboolean gst_rtp_qdm2_depay_setcaps (GstBaseRTPDepayload * filter, + GstCaps * caps); + +static void +gst_rtp_qdm2_depay_base_init (gpointer klass) +{ + GstElementClass *element_class = GST_ELEMENT_CLASS (klass); + + gst_element_class_add_static_pad_template (element_class, + &gst_rtp_qdm2_depay_src_template); + gst_element_class_add_static_pad_template (element_class, + &gst_rtp_qdm2_depay_sink_template); + + + gst_element_class_set_details_simple (element_class, "RTP QDM2 depayloader", + "Codec/Depayloader/Network/RTP", + "Extracts QDM2 audio from RTP packets (no RFC)", + "Edward Hervey <bilboed@bilboed.com>"); +} + +static void +gst_rtp_qdm2_depay_class_init (GstRtpQDM2DepayClass * klass) +{ + GObjectClass *gobject_class; + GstElementClass *gstelement_class; + GstBaseRTPDepayloadClass *gstbasertpdepayload_class; + + gobject_class = (GObjectClass *) klass; + gstelement_class = (GstElementClass *) klass; + gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass; + + gstbasertpdepayload_class->process = gst_rtp_qdm2_depay_process; + gstbasertpdepayload_class->set_caps = gst_rtp_qdm2_depay_setcaps; + + gobject_class->finalize = gst_rtp_qdm2_depay_finalize; + + gstelement_class->change_state = gst_rtp_qdm2_depay_change_state; +} + +static void +gst_rtp_qdm2_depay_init (GstRtpQDM2Depay * rtpqdm2depay, + GstRtpQDM2DepayClass * klass) +{ + rtpqdm2depay->adapter = gst_adapter_new (); +} + +static void +gst_rtp_qdm2_depay_finalize (GObject * object) +{ + GstRtpQDM2Depay *rtpqdm2depay; + + rtpqdm2depay = GST_RTP_QDM2_DEPAY (object); + + g_object_unref (rtpqdm2depay->adapter); + rtpqdm2depay->adapter = NULL; + + G_OBJECT_CLASS (parent_class)->finalize (object); +} + +// only on the sink +gboolean +gst_rtp_qdm2_depay_setcaps (GstBaseRTPDepayload * filter, GstCaps * caps) +{ + GstStructure *structure = gst_caps_get_structure (caps, 0); + gint clock_rate; + + if (!gst_structure_get_int (structure, "clock-rate", &clock_rate)) + clock_rate = 44100; // default + filter->clock_rate = clock_rate; + + /* will set caps later */ + + return TRUE; +} + +static void +flush_data (GstRtpQDM2Depay * depay) +{ + guint i; + guint avail; + + if ((avail = gst_adapter_available (depay->adapter))) + gst_adapter_flush (depay->adapter, avail); + + GST_DEBUG ("Flushing %d packets", depay->nbpackets); + + for (i = 0; depay->packets[i]; i++) { + QDM2Packet *pack = depay->packets[i]; + guint32 crc = 0; + int i = 0; + GstBuffer *buf; + guint8 *data; + + /* CRC is the sum of everything (including first bytes) */ + + data = pack->data; + + if (G_UNLIKELY (data == NULL)) + continue; + + /* If the packet size is bigger than 0xff, we need 2 bytes to store the size */ + if (depay->packetsize > 0xff) { + /* Expanded size 0x02 | 0x80 */ + data[0] = 0x82; + GST_WRITE_UINT16_BE (data + 1, depay->packetsize - 3); + } else { + data[0] = 0x2; + data[1] = depay->packetsize - 2; + } + + /* Calculate CRC */ + for (; i < depay->packetsize; i++) + crc += data[i]; + + GST_DEBUG ("CRC is 0x%x", crc); + + /* Write CRC */ + if (depay->packetsize > 0xff) + GST_WRITE_UINT16_BE (data + 3, crc); + else + GST_WRITE_UINT16_BE (data + 2, crc); + + GST_MEMDUMP ("Extracted packet", data, depay->packetsize); + + buf = gst_buffer_new (); + GST_BUFFER_DATA (buf) = data; + GST_BUFFER_MALLOCDATA (buf) = data; + GST_BUFFER_SIZE (buf) = depay->packetsize; + + gst_adapter_push (depay->adapter, buf); + + if (pack->data) { + pack->data = NULL; + } + } +} + +static void +add_packet (GstRtpQDM2Depay * depay, guint32 pid, guint32 len, guint8 * data) +{ + QDM2Packet *packet; + + if (G_UNLIKELY (!depay->configured)) + return; + + GST_DEBUG ("pid:%d, len:%d, data:%p", pid, len, data); + + if (G_UNLIKELY (depay->packets[pid] == NULL)) { + depay->packets[pid] = g_malloc0 (sizeof (QDM2Packet)); + depay->nbpackets = MAX (depay->nbpackets, pid + 1); + } + packet = depay->packets[pid]; + + GST_DEBUG ("packet:%p", packet); + GST_DEBUG ("packet->data:%p", packet->data); + + if (G_UNLIKELY (packet->data == NULL)) { + packet->data = g_malloc0 (depay->packetsize); + /* We leave space for the header/crc */ + if (depay->packetsize > 0xff) + packet->offs = 5; + else + packet->offs = 4; + } + + /* Finally copy the data over */ + memcpy (packet->data + packet->offs, data, len); + packet->offs += len; +} + +static GstBuffer * +gst_rtp_qdm2_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf) +{ + GstRtpQDM2Depay *rtpqdm2depay; + GstBuffer *outbuf; + guint16 seq; + + rtpqdm2depay = GST_RTP_QDM2_DEPAY (depayload); + + { + gint payload_len; + guint8 *payload; + guint avail; + guint pos = 0; + + payload_len = gst_rtp_buffer_get_payload_len (buf); + if (payload_len < 3) + goto bad_packet; + + payload = gst_rtp_buffer_get_payload (buf); + seq = gst_rtp_buffer_get_seq (buf); + if (G_UNLIKELY (seq != rtpqdm2depay->nextseq)) { + GST_DEBUG ("GAP in sequence number, Resetting data !"); + /* Flush previous data */ + flush_data (rtpqdm2depay); + /* And store new timestamp */ + rtpqdm2depay->ptimestamp = rtpqdm2depay->timestamp; + rtpqdm2depay->timestamp = GST_BUFFER_TIMESTAMP (buf); + /* And that previous data will be pushed at the bottom */ + } + rtpqdm2depay->nextseq = seq + 1; + + GST_DEBUG ("Payload size %d 0x%x sequence:%d", payload_len, payload_len, + seq); + + GST_MEMDUMP ("Incoming payload", payload, payload_len); + + while (pos < payload_len) { + switch (payload[pos]) { + case 0x80:{ + GST_DEBUG ("Unrecognized 0x80 marker, skipping 12 bytes"); + pos += 12; + } + break; + case 0xff: + /* HEADERS */ + GST_DEBUG ("Headers"); + /* Store the incoming timestamp */ + rtpqdm2depay->ptimestamp = rtpqdm2depay->timestamp; + rtpqdm2depay->timestamp = GST_BUFFER_TIMESTAMP (buf); + /* flush the internal data if needed */ + flush_data (rtpqdm2depay); + if (G_UNLIKELY (!rtpqdm2depay->configured)) { + guint8 *ourdata; + GstBuffer *codecdata; + GstCaps *caps; + + /* First bytes are unknown */ + GST_MEMDUMP ("Header", payload + pos, 32); + ourdata = payload + pos + 10; + pos += 10; + rtpqdm2depay->channs = GST_READ_UINT32_BE (payload + pos + 4); + rtpqdm2depay->samplerate = GST_READ_UINT32_BE (payload + pos + 8); + rtpqdm2depay->bitrate = GST_READ_UINT32_BE (payload + pos + 12); + rtpqdm2depay->blocksize = GST_READ_UINT32_BE (payload + pos + 16); + rtpqdm2depay->framesize = GST_READ_UINT32_BE (payload + pos + 20); + rtpqdm2depay->packetsize = GST_READ_UINT32_BE (payload + pos + 24); + /* 16 bit empty block (0x02 0x00) */ + pos += 30; + GST_DEBUG + ("channs:%d, samplerate:%d, bitrate:%d, blocksize:%d, framesize:%d, packetsize:%d", + rtpqdm2depay->channs, rtpqdm2depay->samplerate, + rtpqdm2depay->bitrate, rtpqdm2depay->blocksize, + rtpqdm2depay->framesize, rtpqdm2depay->packetsize); + + /* Caps */ + codecdata = gst_buffer_new_and_alloc (48); + memcpy (GST_BUFFER_DATA (codecdata), headheader, 20); + memcpy (GST_BUFFER_DATA (codecdata) + 20, ourdata, 28); + + caps = gst_caps_new_simple ("audio/x-qdm2", + "samplesize", G_TYPE_INT, 16, + "rate", G_TYPE_INT, rtpqdm2depay->samplerate, + "channels", G_TYPE_INT, rtpqdm2depay->channs, + "codec_data", GST_TYPE_BUFFER, codecdata, NULL); + gst_pad_set_caps (GST_BASE_RTP_DEPAYLOAD_SRCPAD (depayload), caps); + gst_caps_unref (caps); + rtpqdm2depay->configured = TRUE; + } else { + GST_DEBUG ("Already configured, skipping headers"); + pos += 40; + } + break; + default:{ + /* Shuffled packet contents */ + guint packetid = payload[pos++]; + guint packettype = payload[pos++]; + guint packlen = payload[pos++]; + guint hsize = 2; + + GST_DEBUG ("Packet id:%d, type:0x%x, len:%d", + packetid, packettype, packlen); + + /* Packets bigger than 0xff bytes have a type with the high bit set */ + if (G_UNLIKELY (packettype & 0x80)) { + packettype &= 0x7f; + packlen <<= 8; + packlen |= payload[pos++]; + hsize = 3; + GST_DEBUG ("Packet id:%d, type:0x%x, len:%d", + packetid, packettype, packlen); + } + + if (packettype > 0x7f) { + GST_ERROR ("HOUSTON WE HAVE A PROBLEM !!!!"); + } + add_packet (rtpqdm2depay, packetid, packlen + hsize, + payload + pos - hsize); + pos += packlen; + } + } + } + + GST_DEBUG ("final pos %d", pos); + + avail = gst_adapter_available (rtpqdm2depay->adapter); + if (G_UNLIKELY (avail)) { + GST_DEBUG ("Pushing out %d bytes of collected data", avail); + outbuf = gst_adapter_take_buffer (rtpqdm2depay->adapter, avail); + GST_BUFFER_TIMESTAMP (outbuf) = rtpqdm2depay->ptimestamp; + GST_DEBUG ("Outgoing buffer timestamp %" GST_TIME_FORMAT, + GST_TIME_ARGS (rtpqdm2depay->ptimestamp)); + return outbuf; + } + } + return NULL; + + /* ERRORS */ +bad_packet: + { + GST_ELEMENT_WARNING (rtpqdm2depay, STREAM, DECODE, + (NULL), ("Packet was too short")); + return NULL; + } +} + +static GstStateChangeReturn +gst_rtp_qdm2_depay_change_state (GstElement * element, + GstStateChange transition) +{ + GstRtpQDM2Depay *rtpqdm2depay; + GstStateChangeReturn ret; + + rtpqdm2depay = GST_RTP_QDM2_DEPAY (element); + + switch (transition) { + case GST_STATE_CHANGE_NULL_TO_READY: + break; + case GST_STATE_CHANGE_READY_TO_PAUSED: + gst_adapter_clear (rtpqdm2depay->adapter); + break; + default: + break; + } + + ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); + + switch (transition) { + case GST_STATE_CHANGE_READY_TO_NULL: + break; + default: + break; + } + return ret; +} + +gboolean +gst_rtp_qdm2_depay_plugin_init (GstPlugin * plugin) +{ + GST_DEBUG_CATEGORY_INIT (rtpqdm2depay_debug, "rtpqdm2depay", 0, + "RTP QDM2 depayloader"); + + return gst_element_register (plugin, "rtpqdm2depay", + GST_RANK_SECONDARY, GST_TYPE_RTP_QDM2_DEPAY); +} |