| /* GStreamer |
| * Copyright (C) <2006> Wim Taymans <wim.taymans@gmail.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., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include "config.h" |
| #endif |
| |
| #include <string.h> |
| |
| #include <gst/rtp/gstrtpbuffer.h> |
| #include <gst/audio/audio.h> |
| |
| #include "fnv1hash.h" |
| #include "gstrtpvorbispay.h" |
| #include "gstrtputils.h" |
| |
| GST_DEBUG_CATEGORY_STATIC (rtpvorbispay_debug); |
| #define GST_CAT_DEFAULT (rtpvorbispay_debug) |
| |
| /* references: |
| * http://www.rfc-editor.org/rfc/rfc5215.txt |
| */ |
| |
| static GstStaticPadTemplate gst_rtp_vorbis_pay_src_template = |
| GST_STATIC_PAD_TEMPLATE ("src", |
| GST_PAD_SRC, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS ("application/x-rtp, " |
| "media = (string) \"audio\", " |
| "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", " |
| "clock-rate = (int) [1, MAX ], " "encoding-name = (string) \"VORBIS\"" |
| /* All required parameters |
| * |
| * "encoding-params = (string) <num channels>" |
| * "configuration = (string) ANY" |
| */ |
| ) |
| ); |
| |
| static GstStaticPadTemplate gst_rtp_vorbis_pay_sink_template = |
| GST_STATIC_PAD_TEMPLATE ("sink", |
| GST_PAD_SINK, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS ("audio/x-vorbis") |
| ); |
| |
| #define DEFAULT_CONFIG_INTERVAL 0 |
| |
| enum |
| { |
| PROP_0, |
| PROP_CONFIG_INTERVAL |
| }; |
| |
| #define gst_rtp_vorbis_pay_parent_class parent_class |
| G_DEFINE_TYPE (GstRtpVorbisPay, gst_rtp_vorbis_pay, GST_TYPE_RTP_BASE_PAYLOAD); |
| |
| static gboolean gst_rtp_vorbis_pay_setcaps (GstRTPBasePayload * basepayload, |
| GstCaps * caps); |
| static GstStateChangeReturn gst_rtp_vorbis_pay_change_state (GstElement * |
| element, GstStateChange transition); |
| static GstFlowReturn gst_rtp_vorbis_pay_handle_buffer (GstRTPBasePayload * pad, |
| GstBuffer * buffer); |
| static gboolean gst_rtp_vorbis_pay_sink_event (GstRTPBasePayload * payload, |
| GstEvent * event); |
| |
| static gboolean gst_rtp_vorbis_pay_parse_id (GstRTPBasePayload * basepayload, |
| guint8 * data, guint size); |
| static gboolean gst_rtp_vorbis_pay_finish_headers (GstRTPBasePayload * |
| basepayload); |
| |
| static void gst_rtp_vorbis_pay_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec); |
| static void gst_rtp_vorbis_pay_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * pspec); |
| |
| static void |
| gst_rtp_vorbis_pay_class_init (GstRtpVorbisPayClass * klass) |
| { |
| GObjectClass *gobject_class; |
| GstElementClass *gstelement_class; |
| GstRTPBasePayloadClass *gstrtpbasepayload_class; |
| |
| gobject_class = (GObjectClass *) klass; |
| gstelement_class = (GstElementClass *) klass; |
| gstrtpbasepayload_class = (GstRTPBasePayloadClass *) klass; |
| |
| gstelement_class->change_state = gst_rtp_vorbis_pay_change_state; |
| |
| gstrtpbasepayload_class->set_caps = gst_rtp_vorbis_pay_setcaps; |
| gstrtpbasepayload_class->handle_buffer = gst_rtp_vorbis_pay_handle_buffer; |
| gstrtpbasepayload_class->sink_event = gst_rtp_vorbis_pay_sink_event; |
| |
| gobject_class->set_property = gst_rtp_vorbis_pay_set_property; |
| gobject_class->get_property = gst_rtp_vorbis_pay_get_property; |
| |
| gst_element_class_add_static_pad_template (gstelement_class, |
| &gst_rtp_vorbis_pay_src_template); |
| gst_element_class_add_static_pad_template (gstelement_class, |
| &gst_rtp_vorbis_pay_sink_template); |
| |
| gst_element_class_set_static_metadata (gstelement_class, |
| "RTP Vorbis payloader", |
| "Codec/Payloader/Network/RTP", |
| "Payload-encode Vorbis audio into RTP packets (RFC 5215)", |
| "Wim Taymans <wim.taymans@gmail.com>"); |
| |
| GST_DEBUG_CATEGORY_INIT (rtpvorbispay_debug, "rtpvorbispay", 0, |
| "Vorbis RTP Payloader"); |
| |
| g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_CONFIG_INTERVAL, |
| g_param_spec_uint ("config-interval", "Config Send Interval", |
| "Send Config Insertion Interval in seconds (configuration headers " |
| "will be multiplexed in the data stream when detected.) (0 = disabled)", |
| 0, 3600, DEFAULT_CONFIG_INTERVAL, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS) |
| ); |
| } |
| |
| static void |
| gst_rtp_vorbis_pay_init (GstRtpVorbisPay * rtpvorbispay) |
| { |
| rtpvorbispay->last_config = GST_CLOCK_TIME_NONE; |
| } |
| |
| static void |
| gst_rtp_vorbis_pay_clear_packet (GstRtpVorbisPay * rtpvorbispay) |
| { |
| if (rtpvorbispay->packet) |
| gst_buffer_unref (rtpvorbispay->packet); |
| rtpvorbispay->packet = NULL; |
| g_list_free_full (rtpvorbispay->packet_buffers, |
| (GDestroyNotify) gst_buffer_unref); |
| rtpvorbispay->packet_buffers = NULL; |
| } |
| |
| static void |
| gst_rtp_vorbis_pay_cleanup (GstRtpVorbisPay * rtpvorbispay) |
| { |
| gst_rtp_vorbis_pay_clear_packet (rtpvorbispay); |
| g_list_free_full (rtpvorbispay->headers, (GDestroyNotify) gst_buffer_unref); |
| rtpvorbispay->headers = NULL; |
| g_free (rtpvorbispay->config_data); |
| rtpvorbispay->config_data = NULL; |
| rtpvorbispay->last_config = GST_CLOCK_TIME_NONE; |
| } |
| |
| static gboolean |
| gst_rtp_vorbis_pay_setcaps (GstRTPBasePayload * basepayload, GstCaps * caps) |
| { |
| GstRtpVorbisPay *rtpvorbispay; |
| GstStructure *s; |
| const GValue *array; |
| gint asize, i; |
| GstBuffer *buf; |
| GstMapInfo map; |
| |
| rtpvorbispay = GST_RTP_VORBIS_PAY (basepayload); |
| |
| s = gst_caps_get_structure (caps, 0); |
| |
| rtpvorbispay->need_headers = TRUE; |
| |
| if ((array = gst_structure_get_value (s, "streamheader")) == NULL) |
| goto done; |
| |
| if (G_VALUE_TYPE (array) != GST_TYPE_ARRAY) |
| goto done; |
| |
| if ((asize = gst_value_array_get_size (array)) < 3) |
| goto done; |
| |
| for (i = 0; i < asize; i++) { |
| const GValue *value; |
| |
| value = gst_value_array_get_value (array, i); |
| if ((buf = gst_value_get_buffer (value)) == NULL) |
| goto null_buffer; |
| |
| gst_buffer_map (buf, &map, GST_MAP_READ); |
| if (map.size < 1) |
| goto invalid_streamheader; |
| |
| /* no data packets allowed */ |
| if ((map.data[0] & 1) == 0) |
| goto invalid_streamheader; |
| |
| /* we need packets with id 1, 3, 5 */ |
| if (map.data[0] != (i * 2) + 1) |
| goto invalid_streamheader; |
| |
| if (i == 0) { |
| /* identification, we need to parse this in order to get the clock rate. */ |
| if (G_UNLIKELY (!gst_rtp_vorbis_pay_parse_id (basepayload, map.data, |
| map.size))) |
| goto parse_id_failed; |
| } |
| GST_DEBUG_OBJECT (rtpvorbispay, "collecting header %d", i); |
| rtpvorbispay->headers = |
| g_list_append (rtpvorbispay->headers, gst_buffer_ref (buf)); |
| gst_buffer_unmap (buf, &map); |
| } |
| if (!gst_rtp_vorbis_pay_finish_headers (basepayload)) |
| goto finish_failed; |
| |
| done: |
| return TRUE; |
| |
| /* ERRORS */ |
| null_buffer: |
| { |
| GST_WARNING_OBJECT (rtpvorbispay, "streamheader with null buffer received"); |
| return FALSE; |
| } |
| invalid_streamheader: |
| { |
| GST_WARNING_OBJECT (rtpvorbispay, "unable to parse initial header"); |
| gst_buffer_unmap (buf, &map); |
| return FALSE; |
| } |
| parse_id_failed: |
| { |
| GST_WARNING_OBJECT (rtpvorbispay, "unable to parse initial header"); |
| gst_buffer_unmap (buf, &map); |
| return FALSE; |
| } |
| finish_failed: |
| { |
| GST_WARNING_OBJECT (rtpvorbispay, "unable to finish headers"); |
| return FALSE; |
| } |
| } |
| |
| static void |
| gst_rtp_vorbis_pay_reset_packet (GstRtpVorbisPay * rtpvorbispay, guint8 VDT) |
| { |
| guint payload_len; |
| GstRTPBuffer rtp = { NULL }; |
| |
| GST_LOG_OBJECT (rtpvorbispay, "reset packet"); |
| |
| rtpvorbispay->payload_pos = 4; |
| gst_rtp_buffer_map (rtpvorbispay->packet, GST_MAP_READ, &rtp); |
| payload_len = gst_rtp_buffer_get_payload_len (&rtp); |
| gst_rtp_buffer_unmap (&rtp); |
| rtpvorbispay->payload_left = payload_len - 4; |
| rtpvorbispay->payload_duration = 0; |
| rtpvorbispay->payload_F = 0; |
| rtpvorbispay->payload_VDT = VDT; |
| rtpvorbispay->payload_pkts = 0; |
| } |
| |
| static void |
| gst_rtp_vorbis_pay_init_packet (GstRtpVorbisPay * rtpvorbispay, guint8 VDT, |
| GstClockTime timestamp) |
| { |
| GST_LOG_OBJECT (rtpvorbispay, "starting new packet, VDT: %d", VDT); |
| |
| gst_rtp_vorbis_pay_clear_packet (rtpvorbispay); |
| |
| /* new packet allocate max packet size */ |
| rtpvorbispay->packet = |
| gst_rtp_buffer_new_allocate_len (GST_RTP_BASE_PAYLOAD_MTU |
| (rtpvorbispay), 0, 0); |
| gst_rtp_vorbis_pay_reset_packet (rtpvorbispay, VDT); |
| |
| GST_BUFFER_PTS (rtpvorbispay->packet) = timestamp; |
| } |
| |
| static GstFlowReturn |
| gst_rtp_vorbis_pay_flush_packet (GstRtpVorbisPay * rtpvorbispay) |
| { |
| GstFlowReturn ret; |
| guint8 *payload; |
| guint hlen; |
| GstRTPBuffer rtp = { NULL }; |
| GList *l; |
| |
| /* check for empty packet */ |
| if (!rtpvorbispay->packet || rtpvorbispay->payload_pos <= 4) |
| return GST_FLOW_OK; |
| |
| GST_LOG_OBJECT (rtpvorbispay, "flushing packet"); |
| |
| gst_rtp_buffer_map (rtpvorbispay->packet, GST_MAP_WRITE, &rtp); |
| |
| /* fix header */ |
| payload = gst_rtp_buffer_get_payload (&rtp); |
| /* |
| * 0 1 2 3 |
| * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * | Ident | F |VDT|# pkts.| |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * |
| * F: Fragment type (0=none, 1=start, 2=cont, 3=end) |
| * VDT: Vorbis data type (0=vorbis, 1=config, 2=comment, 3=reserved) |
| * pkts: number of packets. |
| */ |
| payload[0] = (rtpvorbispay->payload_ident >> 16) & 0xff; |
| payload[1] = (rtpvorbispay->payload_ident >> 8) & 0xff; |
| payload[2] = (rtpvorbispay->payload_ident) & 0xff; |
| payload[3] = (rtpvorbispay->payload_F & 0x3) << 6 | |
| (rtpvorbispay->payload_VDT & 0x3) << 4 | |
| (rtpvorbispay->payload_pkts & 0xf); |
| |
| gst_rtp_buffer_unmap (&rtp); |
| |
| /* shrink the buffer size to the last written byte */ |
| hlen = gst_rtp_buffer_calc_header_len (0); |
| gst_buffer_resize (rtpvorbispay->packet, 0, hlen + rtpvorbispay->payload_pos); |
| |
| GST_BUFFER_DURATION (rtpvorbispay->packet) = rtpvorbispay->payload_duration; |
| |
| for (l = g_list_last (rtpvorbispay->packet_buffers); l; l = l->prev) { |
| GstBuffer *buf = GST_BUFFER_CAST (l->data); |
| gst_rtp_copy_audio_meta (rtpvorbispay, rtpvorbispay->packet, buf); |
| gst_buffer_unref (buf); |
| } |
| g_list_free (rtpvorbispay->packet_buffers); |
| rtpvorbispay->packet_buffers = NULL; |
| |
| /* push, this gives away our ref to the packet, so clear it. */ |
| ret = |
| gst_rtp_base_payload_push (GST_RTP_BASE_PAYLOAD (rtpvorbispay), |
| rtpvorbispay->packet); |
| rtpvorbispay->packet = NULL; |
| |
| return ret; |
| } |
| |
| static gboolean |
| gst_rtp_vorbis_pay_finish_headers (GstRTPBasePayload * basepayload) |
| { |
| GstRtpVorbisPay *rtpvorbispay = GST_RTP_VORBIS_PAY (basepayload); |
| GList *walk; |
| guint length, size, n_headers, configlen, extralen; |
| gchar *cstr, *configuration; |
| guint8 *data, *config; |
| guint32 ident; |
| gboolean res; |
| |
| GST_DEBUG_OBJECT (rtpvorbispay, "finish headers"); |
| |
| if (!rtpvorbispay->headers) |
| goto no_headers; |
| |
| /* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * | Number of packed headers | |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * | Packed header | |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * | Packed header | |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * | .... | |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * |
| * We only construct a config containing 1 packed header like this: |
| * |
| * 0 1 2 3 |
| * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * | Ident | length .. |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * .. | n. of headers | length1 | length2 .. |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * .. | Identification Header .. |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * ................................................................. |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * .. | Comment Header .. |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * ................................................................. |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * .. Comment Header | |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * | Setup Header .. |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * ................................................................. |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| * .. Setup Header | |
| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| */ |
| |
| /* we need 4 bytes for the number of headers (which is always 1), 3 bytes for |
| * the ident, 2 bytes for length, 1 byte for n. of headers. */ |
| size = 4 + 3 + 2 + 1; |
| |
| /* count the size of the headers first and update the hash */ |
| length = 0; |
| n_headers = 0; |
| ident = fnv1_hash_32_new (); |
| extralen = 1; |
| for (walk = rtpvorbispay->headers; walk; walk = g_list_next (walk)) { |
| GstBuffer *buf = GST_BUFFER_CAST (walk->data); |
| GstMapInfo map; |
| guint bsize; |
| |
| bsize = gst_buffer_get_size (buf); |
| length += bsize; |
| n_headers++; |
| |
| /* count number of bytes needed for length fields, we don't need this for |
| * the last header. */ |
| if (g_list_next (walk)) { |
| do { |
| size++; |
| extralen++; |
| bsize >>= 7; |
| } while (bsize); |
| } |
| /* update hash */ |
| gst_buffer_map (buf, &map, GST_MAP_READ); |
| ident = fnv1_hash_32_update (ident, map.data, map.size); |
| gst_buffer_unmap (buf, &map); |
| } |
| |
| /* packet length is header size + packet length */ |
| configlen = size + length; |
| config = data = g_malloc (configlen); |
| |
| /* number of packed headers, we only pack 1 header */ |
| data[0] = 0; |
| data[1] = 0; |
| data[2] = 0; |
| data[3] = 1; |
| |
| ident = fnv1_hash_32_to_24 (ident); |
| rtpvorbispay->payload_ident = ident; |
| GST_DEBUG_OBJECT (rtpvorbispay, "ident 0x%08x", ident); |
| |
| /* take lower 3 bytes */ |
| data[4] = (ident >> 16) & 0xff; |
| data[5] = (ident >> 8) & 0xff; |
| data[6] = ident & 0xff; |
| |
| /* store length of all vorbis headers */ |
| data[7] = ((length) >> 8) & 0xff; |
| data[8] = (length) & 0xff; |
| |
| /* store number of headers minus one. */ |
| data[9] = n_headers - 1; |
| data += 10; |
| |
| /* store length for each header */ |
| for (walk = rtpvorbispay->headers; walk; walk = g_list_next (walk)) { |
| GstBuffer *buf = GST_BUFFER_CAST (walk->data); |
| guint bsize, size, temp; |
| guint flag; |
| |
| /* only need to store the length when it's not the last header */ |
| if (!g_list_next (walk)) |
| break; |
| |
| bsize = gst_buffer_get_size (buf); |
| |
| /* calc size */ |
| size = 0; |
| do { |
| size++; |
| bsize >>= 7; |
| } while (bsize); |
| temp = size; |
| |
| bsize = gst_buffer_get_size (buf); |
| /* write the size backwards */ |
| flag = 0; |
| while (size) { |
| size--; |
| data[size] = (bsize & 0x7f) | flag; |
| bsize >>= 7; |
| flag = 0x80; /* Flag bit on all bytes of the length except the last */ |
| } |
| data += temp; |
| } |
| |
| /* copy header data */ |
| for (walk = rtpvorbispay->headers; walk; walk = g_list_next (walk)) { |
| GstBuffer *buf = GST_BUFFER_CAST (walk->data); |
| |
| gst_buffer_extract (buf, 0, data, gst_buffer_get_size (buf)); |
| data += gst_buffer_get_size (buf); |
| } |
| rtpvorbispay->need_headers = FALSE; |
| |
| /* serialize to base64 */ |
| configuration = g_base64_encode (config, configlen); |
| |
| /* store for later re-sending */ |
| g_free (rtpvorbispay->config_data); |
| rtpvorbispay->config_size = configlen - 4 - 3 - 2; |
| rtpvorbispay->config_data = g_malloc (rtpvorbispay->config_size); |
| rtpvorbispay->config_extra_len = extralen; |
| memcpy (rtpvorbispay->config_data, config + 4 + 3 + 2, |
| rtpvorbispay->config_size); |
| |
| g_free (config); |
| |
| /* configure payloader settings */ |
| cstr = g_strdup_printf ("%d", rtpvorbispay->channels); |
| gst_rtp_base_payload_set_options (basepayload, "audio", TRUE, "VORBIS", |
| rtpvorbispay->rate); |
| res = |
| gst_rtp_base_payload_set_outcaps (basepayload, "encoding-params", |
| G_TYPE_STRING, cstr, "configuration", G_TYPE_STRING, configuration, NULL); |
| g_free (cstr); |
| g_free (configuration); |
| |
| return res; |
| |
| /* ERRORS */ |
| no_headers: |
| { |
| GST_DEBUG_OBJECT (rtpvorbispay, "finish headers"); |
| return FALSE; |
| } |
| } |
| |
| static gboolean |
| gst_rtp_vorbis_pay_parse_id (GstRTPBasePayload * basepayload, guint8 * data, |
| guint size) |
| { |
| GstRtpVorbisPay *rtpvorbispay = GST_RTP_VORBIS_PAY (basepayload); |
| guint8 channels; |
| gint32 rate, version; |
| |
| if (G_UNLIKELY (size < 16)) |
| goto too_short; |
| |
| if (G_UNLIKELY (memcmp (data, "\001vorbis", 7))) |
| goto invalid_start; |
| data += 7; |
| |
| if (G_UNLIKELY ((version = GST_READ_UINT32_LE (data)) != 0)) |
| goto invalid_version; |
| data += 4; |
| |
| if (G_UNLIKELY ((channels = *data++) < 1)) |
| goto invalid_channels; |
| |
| if (G_UNLIKELY ((rate = GST_READ_UINT32_LE (data)) < 1)) |
| goto invalid_rate; |
| |
| /* all fine, store the values */ |
| rtpvorbispay->channels = channels; |
| rtpvorbispay->rate = rate; |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| too_short: |
| { |
| GST_ELEMENT_ERROR (basepayload, STREAM, DECODE, |
| ("Identification packet is too short, need at least 16, got %d", size), |
| (NULL)); |
| return FALSE; |
| } |
| invalid_start: |
| { |
| GST_ELEMENT_ERROR (basepayload, STREAM, DECODE, |
| ("Invalid header start in identification packet"), (NULL)); |
| return FALSE; |
| } |
| invalid_version: |
| { |
| GST_ELEMENT_ERROR (basepayload, STREAM, DECODE, |
| ("Invalid version, expected 0, got %d", version), (NULL)); |
| return FALSE; |
| } |
| invalid_rate: |
| { |
| GST_ELEMENT_ERROR (basepayload, STREAM, DECODE, |
| ("Invalid rate %d", rate), (NULL)); |
| return FALSE; |
| } |
| invalid_channels: |
| { |
| GST_ELEMENT_ERROR (basepayload, STREAM, DECODE, |
| ("Invalid channels %d", channels), (NULL)); |
| return FALSE; |
| } |
| } |
| |
| static GstFlowReturn |
| gst_rtp_vorbis_pay_payload_buffer (GstRtpVorbisPay * rtpvorbispay, guint8 VDT, |
| GstBuffer * buffer, guint8 * data, guint size, GstClockTime timestamp, |
| GstClockTime duration, guint not_in_length) |
| { |
| GstFlowReturn ret = GST_FLOW_OK; |
| guint newsize; |
| guint packet_len; |
| GstClockTime newduration; |
| gboolean flush; |
| guint plen; |
| guint8 *ppos, *payload; |
| gboolean fragmented; |
| GstRTPBuffer rtp = { NULL }; |
| |
| /* size increases with packet length and 2 bytes size eader. */ |
| newduration = rtpvorbispay->payload_duration; |
| if (duration != GST_CLOCK_TIME_NONE) |
| newduration += duration; |
| |
| newsize = rtpvorbispay->payload_pos + 2 + size; |
| packet_len = gst_rtp_buffer_calc_packet_len (newsize, 0, 0); |
| |
| /* check buffer filled against length and max latency */ |
| flush = gst_rtp_base_payload_is_filled (GST_RTP_BASE_PAYLOAD (rtpvorbispay), |
| packet_len, newduration); |
| /* we can store up to 15 vorbis packets in one RTP packet. */ |
| flush |= (rtpvorbispay->payload_pkts == 15); |
| /* flush if we have a new VDT */ |
| if (rtpvorbispay->packet) |
| flush |= (rtpvorbispay->payload_VDT != VDT); |
| if (flush) |
| ret = gst_rtp_vorbis_pay_flush_packet (rtpvorbispay); |
| |
| if (ret != GST_FLOW_OK) |
| goto done; |
| |
| /* create new packet if we must */ |
| if (!rtpvorbispay->packet) { |
| gst_rtp_vorbis_pay_init_packet (rtpvorbispay, VDT, timestamp); |
| } |
| |
| gst_rtp_buffer_map (rtpvorbispay->packet, GST_MAP_WRITE, &rtp); |
| payload = gst_rtp_buffer_get_payload (&rtp); |
| ppos = payload + rtpvorbispay->payload_pos; |
| fragmented = FALSE; |
| |
| /* put buffer in packet, it either fits completely or needs to be fragmented |
| * over multiple RTP packets. */ |
| do { |
| plen = MIN (rtpvorbispay->payload_left - 2, size); |
| |
| GST_LOG_OBJECT (rtpvorbispay, "append %u bytes", plen); |
| |
| /* data is copied in the payload with a 2 byte length header */ |
| ppos[0] = ((plen - not_in_length) >> 8) & 0xff; |
| ppos[1] = ((plen - not_in_length) & 0xff); |
| if (plen) |
| memcpy (&ppos[2], data, plen); |
| |
| if (buffer) { |
| if (!rtpvorbispay->packet_buffers |
| || rtpvorbispay->packet_buffers->data != (gpointer) buffer) |
| rtpvorbispay->packet_buffers = |
| g_list_prepend (rtpvorbispay->packet_buffers, |
| gst_buffer_ref (buffer)); |
| } else { |
| GList *l; |
| |
| for (l = rtpvorbispay->headers; l; l = l->next) |
| rtpvorbispay->packet_buffers = |
| g_list_prepend (rtpvorbispay->packet_buffers, |
| gst_buffer_ref (l->data)); |
| } |
| |
| /* only first (only) configuration cuts length field */ |
| /* NOTE: spec (if any) is not clear on this ... */ |
| not_in_length = 0; |
| |
| size -= plen; |
| data += plen; |
| |
| rtpvorbispay->payload_pos += plen + 2; |
| rtpvorbispay->payload_left -= plen + 2; |
| |
| if (fragmented) { |
| if (size == 0) |
| /* last fragment, set F to 0x3. */ |
| rtpvorbispay->payload_F = 0x3; |
| else |
| /* fragment continues, set F to 0x2. */ |
| rtpvorbispay->payload_F = 0x2; |
| } else { |
| if (size > 0) { |
| /* fragmented packet starts, set F to 0x1, mark ourselves as |
| * fragmented. */ |
| rtpvorbispay->payload_F = 0x1; |
| fragmented = TRUE; |
| } |
| } |
| if (fragmented) { |
| gst_rtp_buffer_unmap (&rtp); |
| /* fragmented packets are always flushed and have ptks of 0 */ |
| rtpvorbispay->payload_pkts = 0; |
| ret = gst_rtp_vorbis_pay_flush_packet (rtpvorbispay); |
| |
| if (size > 0) { |
| /* start new packet and get pointers. VDT stays the same. */ |
| gst_rtp_vorbis_pay_init_packet (rtpvorbispay, |
| rtpvorbispay->payload_VDT, timestamp); |
| gst_rtp_buffer_map (rtpvorbispay->packet, GST_MAP_WRITE, &rtp); |
| payload = gst_rtp_buffer_get_payload (&rtp); |
| ppos = payload + rtpvorbispay->payload_pos; |
| } |
| } else { |
| /* unfragmented packet, update stats for next packet, size == 0 and we |
| * exit the while loop */ |
| rtpvorbispay->payload_pkts++; |
| if (duration != GST_CLOCK_TIME_NONE) |
| rtpvorbispay->payload_duration += duration; |
| } |
| } while (size && ret == GST_FLOW_OK); |
| |
| if (rtp.buffer) |
| gst_rtp_buffer_unmap (&rtp); |
| |
| done: |
| |
| return ret; |
| } |
| |
| static GstFlowReturn |
| gst_rtp_vorbis_pay_handle_buffer (GstRTPBasePayload * basepayload, |
| GstBuffer * buffer) |
| { |
| GstRtpVorbisPay *rtpvorbispay; |
| GstFlowReturn ret; |
| GstMapInfo map; |
| gsize size; |
| guint8 *data; |
| GstClockTime duration, timestamp; |
| guint8 VDT; |
| |
| rtpvorbispay = GST_RTP_VORBIS_PAY (basepayload); |
| |
| gst_buffer_map (buffer, &map, GST_MAP_READ); |
| data = map.data; |
| size = map.size; |
| duration = GST_BUFFER_DURATION (buffer); |
| timestamp = GST_BUFFER_PTS (buffer); |
| |
| GST_LOG_OBJECT (rtpvorbispay, "size %" G_GSIZE_FORMAT |
| ", duration %" GST_TIME_FORMAT, size, GST_TIME_ARGS (duration)); |
| |
| if (G_UNLIKELY (size < 1)) |
| goto wrong_size; |
| |
| /* find packet type */ |
| if (data[0] & 1) { |
| /* header */ |
| if (data[0] == 1) { |
| /* identification, we need to parse this in order to get the clock rate. */ |
| if (G_UNLIKELY (!gst_rtp_vorbis_pay_parse_id (basepayload, data, size))) |
| goto parse_id_failed; |
| VDT = 1; |
| } else if (data[0] == 3) { |
| /* comment */ |
| VDT = 2; |
| } else if (data[0] == 5) { |
| /* setup */ |
| VDT = 1; |
| } else |
| goto unknown_header; |
| } else |
| /* data */ |
| VDT = 0; |
| |
| /* we need to collect the headers and construct a config string from them */ |
| if (VDT != 0) { |
| rtpvorbispay->need_headers = TRUE; |
| if (!rtpvorbispay->need_headers && VDT == 1) { |
| GST_INFO_OBJECT (rtpvorbispay, "getting new headers, replace existing"); |
| g_list_free_full (rtpvorbispay->headers, |
| (GDestroyNotify) gst_buffer_unref); |
| rtpvorbispay->headers = NULL; |
| } |
| GST_DEBUG_OBJECT (rtpvorbispay, "collecting header"); |
| /* append header to the list of headers, or replace |
| * if the same type of header was already in there. |
| * |
| * This prevents storing an infinite amount of e.g. comment headers, there |
| * must only be one */ |
| gst_buffer_unmap (buffer, &map); |
| |
| if (rtpvorbispay->headers) { |
| gboolean found = FALSE; |
| GList *l; |
| guint8 new_header_type; |
| |
| gst_buffer_extract (buffer, 0, &new_header_type, 1); |
| |
| for (l = rtpvorbispay->headers; l; l = l->next) { |
| GstBuffer *header = l->data; |
| guint8 header_type; |
| |
| if (gst_buffer_extract (header, 0, &header_type, 1) |
| && header_type == new_header_type) { |
| found = TRUE; |
| gst_buffer_unref (header); |
| l->data = buffer; |
| break; |
| } |
| } |
| if (!found) |
| rtpvorbispay->headers = g_list_append (rtpvorbispay->headers, buffer); |
| } else { |
| rtpvorbispay->headers = g_list_append (rtpvorbispay->headers, buffer); |
| } |
| |
| ret = GST_FLOW_OK; |
| goto done; |
| } else if (rtpvorbispay->headers && rtpvorbispay->need_headers) { |
| if (!gst_rtp_vorbis_pay_finish_headers (basepayload)) |
| goto header_error; |
| } |
| |
| /* there is a config request, see if we need to insert it */ |
| if (rtpvorbispay->config_interval > 0 && rtpvorbispay->config_data) { |
| gboolean send_config = FALSE; |
| GstClockTime running_time = |
| gst_segment_to_running_time (&basepayload->segment, GST_FORMAT_TIME, |
| timestamp); |
| |
| if (rtpvorbispay->last_config != -1) { |
| guint64 diff; |
| |
| GST_LOG_OBJECT (rtpvorbispay, |
| "now %" GST_TIME_FORMAT ", last config %" GST_TIME_FORMAT, |
| GST_TIME_ARGS (running_time), |
| GST_TIME_ARGS (rtpvorbispay->last_config)); |
| |
| /* calculate diff between last config in milliseconds */ |
| if (running_time > rtpvorbispay->last_config) { |
| diff = running_time - rtpvorbispay->last_config; |
| } else { |
| diff = 0; |
| } |
| |
| GST_DEBUG_OBJECT (rtpvorbispay, |
| "interval since last config %" GST_TIME_FORMAT, GST_TIME_ARGS (diff)); |
| |
| /* bigger than interval, queue config */ |
| if (GST_TIME_AS_SECONDS (diff) >= rtpvorbispay->config_interval) { |
| GST_DEBUG_OBJECT (rtpvorbispay, "time to send config"); |
| send_config = TRUE; |
| } |
| } else { |
| /* no known previous config time, send now */ |
| GST_DEBUG_OBJECT (rtpvorbispay, "no previous config time, send now"); |
| send_config = TRUE; |
| } |
| |
| if (send_config) { |
| /* we need to send config now first */ |
| /* different TDT type forces flush */ |
| gst_rtp_vorbis_pay_payload_buffer (rtpvorbispay, 1, |
| NULL, rtpvorbispay->config_data, rtpvorbispay->config_size, |
| timestamp, GST_CLOCK_TIME_NONE, rtpvorbispay->config_extra_len); |
| |
| if (running_time != -1) { |
| rtpvorbispay->last_config = running_time; |
| } |
| } |
| } |
| |
| ret = |
| gst_rtp_vorbis_pay_payload_buffer (rtpvorbispay, VDT, buffer, data, size, |
| timestamp, duration, 0); |
| |
| gst_buffer_unmap (buffer, &map); |
| gst_buffer_unref (buffer); |
| |
| done: |
| return ret; |
| |
| /* ERRORS */ |
| wrong_size: |
| { |
| GST_ELEMENT_WARNING (rtpvorbispay, STREAM, DECODE, |
| ("Invalid packet size (1 < %" G_GSIZE_FORMAT ")", size), (NULL)); |
| gst_buffer_unmap (buffer, &map); |
| gst_buffer_unref (buffer); |
| return GST_FLOW_OK; |
| } |
| parse_id_failed: |
| { |
| gst_buffer_unmap (buffer, &map); |
| gst_buffer_unref (buffer); |
| return GST_FLOW_ERROR; |
| } |
| unknown_header: |
| { |
| GST_ELEMENT_WARNING (rtpvorbispay, STREAM, DECODE, |
| (NULL), ("Ignoring unknown header received")); |
| gst_buffer_unmap (buffer, &map); |
| gst_buffer_unref (buffer); |
| return GST_FLOW_OK; |
| } |
| header_error: |
| { |
| GST_ELEMENT_WARNING (rtpvorbispay, STREAM, DECODE, |
| (NULL), ("Error initializing header config")); |
| gst_buffer_unmap (buffer, &map); |
| gst_buffer_unref (buffer); |
| return GST_FLOW_OK; |
| } |
| } |
| |
| static gboolean |
| gst_rtp_vorbis_pay_sink_event (GstRTPBasePayload * payload, GstEvent * event) |
| { |
| GstRtpVorbisPay *rtpvorbispay = GST_RTP_VORBIS_PAY (payload); |
| |
| switch (GST_EVENT_TYPE (event)) { |
| case GST_EVENT_FLUSH_STOP: |
| gst_rtp_vorbis_pay_clear_packet (rtpvorbispay); |
| break; |
| default: |
| break; |
| } |
| /* false to let parent handle event as well */ |
| return GST_RTP_BASE_PAYLOAD_CLASS (parent_class)->sink_event (payload, event); |
| } |
| |
| static GstStateChangeReturn |
| gst_rtp_vorbis_pay_change_state (GstElement * element, |
| GstStateChange transition) |
| { |
| GstRtpVorbisPay *rtpvorbispay; |
| GstStateChangeReturn ret; |
| |
| rtpvorbispay = GST_RTP_VORBIS_PAY (element); |
| |
| switch (transition) { |
| default: |
| break; |
| } |
| |
| ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); |
| |
| switch (transition) { |
| case GST_STATE_CHANGE_PAUSED_TO_READY: |
| gst_rtp_vorbis_pay_cleanup (rtpvorbispay); |
| break; |
| default: |
| break; |
| } |
| return ret; |
| } |
| |
| static void |
| gst_rtp_vorbis_pay_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec) |
| { |
| GstRtpVorbisPay *rtpvorbispay; |
| |
| rtpvorbispay = GST_RTP_VORBIS_PAY (object); |
| |
| switch (prop_id) { |
| case PROP_CONFIG_INTERVAL: |
| rtpvorbispay->config_interval = g_value_get_uint (value); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static void |
| gst_rtp_vorbis_pay_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * pspec) |
| { |
| GstRtpVorbisPay *rtpvorbispay; |
| |
| rtpvorbispay = GST_RTP_VORBIS_PAY (object); |
| |
| switch (prop_id) { |
| case PROP_CONFIG_INTERVAL: |
| g_value_set_uint (value, rtpvorbispay->config_interval); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| gboolean |
| gst_rtp_vorbis_pay_plugin_init (GstPlugin * plugin) |
| { |
| return gst_element_register (plugin, "rtpvorbispay", |
| GST_RANK_SECONDARY, GST_TYPE_RTP_VORBIS_PAY); |
| } |