static GstBuffer * gst_rtp_L16_depay_process (GstRTPBaseDepayload * depayload, GstBuffer * buf) { GstRtpL16Depay *rtpL16depay; GstBuffer *outbuf; gint payload_len; gboolean marker; GstRTPBuffer rtp = { NULL }; rtpL16depay = GST_RTP_L16_DEPAY (depayload); gst_rtp_buffer_map (buf, GST_MAP_READ, &rtp); payload_len = gst_rtp_buffer_get_payload_len (&rtp); if (payload_len <= 0) goto empty_packet; GST_DEBUG_OBJECT (rtpL16depay, "got payload of %d bytes", payload_len); outbuf = gst_rtp_buffer_get_payload_buffer (&rtp); marker = gst_rtp_buffer_get_marker (&rtp); if (marker) { /* mark talk spurt with DISCONT */ GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT); } outbuf = gst_buffer_make_writable (outbuf); if (rtpL16depay->order && !gst_audio_buffer_reorder_channels (outbuf, rtpL16depay->info.finfo->format, rtpL16depay->info.channels, rtpL16depay->info.position, rtpL16depay->order->pos)) { goto reorder_failed; } gst_rtp_buffer_unmap (&rtp); return outbuf; /* ERRORS */ empty_packet: { GST_ELEMENT_WARNING (rtpL16depay, STREAM, DECODE, ("Empty Payload."), (NULL)); gst_rtp_buffer_unmap (&rtp); return NULL; } reorder_failed: { GST_ELEMENT_ERROR (rtpL16depay, STREAM, DECODE, ("Channel reordering failed."), (NULL)); gst_rtp_buffer_unmap (&rtp); return NULL; } }
static gboolean gst_rtp_L16_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps) { GstStructure *structure; GstRtpL16Depay *rtpL16depay; gint clock_rate, payload; gint channels; GstCaps *srccaps; gboolean res; const gchar *channel_order; const GstRTPChannelOrder *order; GstAudioInfo *info; rtpL16depay = GST_RTP_L16_DEPAY (depayload); structure = gst_caps_get_structure (caps, 0); payload = 96; gst_structure_get_int (structure, "payload", &payload); switch (payload) { case GST_RTP_PAYLOAD_L16_STEREO: channels = 2; clock_rate = 44100; break; case GST_RTP_PAYLOAD_L16_MONO: channels = 1; clock_rate = 44100; break; default: /* no fixed mapping, we need clock-rate */ channels = 0; clock_rate = 0; break; } /* caps can overwrite defaults */ clock_rate = gst_rtp_L16_depay_parse_int (structure, "clock-rate", clock_rate); if (clock_rate == 0) goto no_clockrate; channels = gst_rtp_L16_depay_parse_int (structure, "encoding-params", channels); if (channels == 0) { channels = gst_rtp_L16_depay_parse_int (structure, "channels", channels); if (channels == 0) { /* channels defaults to 1 otherwise */ channels = 1; } } depayload->clock_rate = clock_rate; info = &rtpL16depay->info; gst_audio_info_init (info); info->finfo = gst_audio_format_get_info (GST_AUDIO_FORMAT_S16BE); info->rate = clock_rate; info->channels = channels; info->bpf = (info->finfo->width / 8) * channels; /* add channel positions */ channel_order = gst_structure_get_string (structure, "channel-order"); order = gst_rtp_channels_get_by_order (channels, channel_order); rtpL16depay->order = order; if (order) { memcpy (info->position, order->pos, sizeof (GstAudioChannelPosition) * channels); gst_audio_channel_positions_to_valid_order (info->position, info->channels); } else { GST_ELEMENT_WARNING (rtpL16depay, STREAM, DECODE, (NULL), ("Unknown channel order '%s' for %d channels", GST_STR_NULL (channel_order), channels)); /* create default NONE layout */ gst_rtp_channels_create_default (channels, info->position); } srccaps = gst_audio_info_to_caps (info); res = gst_pad_set_caps (depayload->srcpad, srccaps); gst_caps_unref (srccaps); return res; /* ERRORS */ no_clockrate: { GST_ERROR_OBJECT (depayload, "no clock-rate specified"); return FALSE; } }
static GstBuffer * gst_rtp_L16_depay_process (GstRTPBaseDepayload * depayload, GstRTPBuffer * rtp) { GstRtpL16Depay *rtpL16depay; GstBuffer *outbuf; gint payload_len; gboolean marker; GstAudioInfo *info; rtpL16depay = GST_RTP_L16_DEPAY (depayload); payload_len = gst_rtp_buffer_get_payload_len (rtp); if (payload_len <= 0) goto empty_packet; GST_DEBUG_OBJECT (rtpL16depay, "got payload of %d bytes", payload_len); outbuf = gst_rtp_buffer_get_payload_buffer (rtp); marker = gst_rtp_buffer_get_marker (rtp); if (marker) { /* mark talk spurt with RESYNC */ GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_RESYNC); } outbuf = gst_buffer_make_writable (outbuf); info = &rtpL16depay->info; if (payload_len % ((info->finfo->width * info->channels) / 8) != 0) goto wrong_payload_size; if (rtpL16depay->order && !gst_audio_buffer_reorder_channels (outbuf, info->finfo->format, info->channels, info->position, rtpL16depay->order->pos)) { goto reorder_failed; } gst_rtp_drop_meta (GST_ELEMENT_CAST (rtpL16depay), outbuf, g_quark_from_static_string (GST_META_TAG_AUDIO_STR)); return outbuf; /* ERRORS */ empty_packet: { GST_ELEMENT_WARNING (rtpL16depay, STREAM, DECODE, ("Empty Payload."), (NULL)); return NULL; } wrong_payload_size: { GST_ELEMENT_WARNING (rtpL16depay, STREAM, DECODE, ("Wrong Payload Size."), (NULL)); return NULL; } reorder_failed: { GST_ELEMENT_ERROR (rtpL16depay, STREAM, DECODE, ("Channel reordering failed."), (NULL)); return NULL; } }