2 * Copyright (C) 2008 Axis Communications <dev-gstreamer@axis.com>
3 * @author Bjorn Ostby <bjorn.ostby@axis.com>
4 * @author Peter Kjellerstedt <peter.kjellerstedt@axis.com>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
23 * SECTION:element-rtpjpegpay
25 * Payload encode JPEG pictures into RTP packets according to RFC 2435.
26 * For detailed information see: http://www.rfc-editor.org/rfc/rfc2435.txt
28 * The payloader takes a JPEG picture, scans the header for quantization
29 * tables (if needed) and constructs the RTP packet header followed by
30 * the actual JPEG entropy scan.
32 * The payloader assumes that correct width and height is found in the caps.
40 #include <gst/rtp/gstrtpbuffer.h>
42 #include "gstrtpjpegpay.h"
44 static GstStaticPadTemplate gst_rtp_jpeg_pay_sink_template =
45 GST_STATIC_PAD_TEMPLATE ("sink",
48 GST_STATIC_CAPS ("image/jpeg; " "video/x-jpeg")
51 static GstStaticPadTemplate gst_rtp_jpeg_pay_src_template =
52 GST_STATIC_PAD_TEMPLATE ("src",
55 GST_STATIC_CAPS ("application/x-rtp, "
56 " media = (string) \"video\", "
57 " payload = (int) 26 , "
58 " clock-rate = (int) 90000, "
59 " encoding-name = (string) \"JPEG\", "
60 " width = (int) [ 1, 65536 ], " " height = (int) [ 1, 65536 ]")
63 GST_DEBUG_CATEGORY_STATIC (rtpjpegpay_debug);
64 #define GST_CAT_DEFAULT (rtpjpegpay_debug)
69 * Prefix length in the header before the quantization tables:
70 * Two size bytes and one byte for precision
72 #define QUANT_PREFIX_LEN 3
75 typedef enum _RtpJpegMarker RtpJpegMarker;
79 * @JPEG_MARKER: Prefix for JPEG marker
80 * @JPEG_MARKER_SOI: Start of Image marker
81 * @JPEG_MARKER_JFIF: JFIF marker
82 * @JPEG_MARKER_CMT: Comment marker
83 * @JPEG_MARKER_DQT: Define Quantization Table marker
84 * @JPEG_MARKER_SOF: Start of Frame marker
85 * @JPEG_MARKER_DHT: Define Huffman Table marker
86 * @JPEG_MARKER_SOS: Start of Scan marker
87 * @JPEG_MARKER_EOI: End of Image marker
88 * @JPEG_MARKER_DRI: Define Restart Interval marker
89 * @JPEG_MARKER_H264: H264 marker
91 * Identifers for markers in JPEG header
96 JPEG_MARKER_SOI = 0xD8,
97 JPEG_MARKER_JFIF = 0xE0,
98 JPEG_MARKER_CMT = 0xFE,
99 JPEG_MARKER_DQT = 0xDB,
100 JPEG_MARKER_SOF = 0xC0,
101 JPEG_MARKER_DHT = 0xC4,
102 JPEG_MARKER_SOS = 0xDA,
103 JPEG_MARKER_EOI = 0xD9,
104 JPEG_MARKER_DRI = 0xDD,
105 JPEG_MARKER_H264 = 0xE4
108 #define DEFAULT_JPEG_QUANT 255
110 #define DEFAULT_JPEG_QUALITY 255
111 #define DEFAULT_JPEG_TYPE 1
125 Q_TABLE_MAX /* only support for two tables at the moment */
128 typedef struct _RtpJpegHeader RtpJpegHeader;
132 * @type_spec: type specific
133 * @offset: fragment offset
135 * @q: quantization table for this frame
136 * @width: width of image in 8-pixel multiples
137 * @height: height of image in 8-pixel multiples
140 * 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
141 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
142 * | Type-specific | Fragment Offset |
143 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
144 * | Type | Q | Width | Height |
145 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
147 struct _RtpJpegHeader
160 * @precision: specify size of quantization tables
161 * @length: length of quantization data
164 * 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
165 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
166 * | MBZ | Precision | Length |
167 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
168 * | Quantization Table Data |
170 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
186 * RtpRestartMarkerHeader:
187 * @restartInterval: number of MCUs that appear between restart markers
188 * @restartFirstLastCount: a combination of the first packet mark in the chunk
189 * last packet mark in the chunk and the position of the
190 * first restart interval in the current "chunk"
193 * 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
194 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
195 * | Restart Interval |F|L| Restart Count |
196 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
198 * The restart marker header is implemented according to the following
199 * methodology specified in section 3.1.7 of rfc2435.txt.
201 * "If the restart intervals in a frame are not guaranteed to be aligned
202 * with packet boundaries, the F (first) and L (last) bits MUST be set
203 * to 1 and the Restart Count MUST be set to 0x3FFF. This indicates
204 * that a receiver MUST reassemble the entire frame before decoding it."
210 guint16 restart_interval;
211 guint16 restart_count;
212 } RtpRestartMarkerHeader;
221 /* FIXME: restart marker header currently unsupported */
223 static void gst_rtp_jpeg_pay_set_property (GObject * object, guint prop_id,
224 const GValue * value, GParamSpec * pspec);
226 static void gst_rtp_jpeg_pay_get_property (GObject * object, guint prop_id,
227 GValue * value, GParamSpec * pspec);
229 static gboolean gst_rtp_jpeg_pay_setcaps (GstRTPBasePayload * basepayload,
232 static GstFlowReturn gst_rtp_jpeg_pay_handle_buffer (GstRTPBasePayload * pad,
235 #define gst_rtp_jpeg_pay_parent_class parent_class
236 G_DEFINE_TYPE (GstRtpJPEGPay, gst_rtp_jpeg_pay, GST_TYPE_RTP_BASE_PAYLOAD);
239 gst_rtp_jpeg_pay_class_init (GstRtpJPEGPayClass * klass)
241 GObjectClass *gobject_class;
242 GstElementClass *gstelement_class;
243 GstRTPBasePayloadClass *gstrtpbasepayload_class;
245 gobject_class = (GObjectClass *) klass;
246 gstelement_class = (GstElementClass *) klass;
247 gstrtpbasepayload_class = (GstRTPBasePayloadClass *) klass;
249 gobject_class->set_property = gst_rtp_jpeg_pay_set_property;
250 gobject_class->get_property = gst_rtp_jpeg_pay_get_property;
252 gst_element_class_add_pad_template (gstelement_class,
253 gst_static_pad_template_get (&gst_rtp_jpeg_pay_src_template));
254 gst_element_class_add_pad_template (gstelement_class,
255 gst_static_pad_template_get (&gst_rtp_jpeg_pay_sink_template));
257 gst_element_class_set_static_metadata (gstelement_class, "RTP JPEG payloader",
258 "Codec/Payloader/Network/RTP",
259 "Payload-encodes JPEG pictures into RTP packets (RFC 2435)",
260 "Axis Communications <dev-gstreamer@axis.com>");
262 gstrtpbasepayload_class->set_caps = gst_rtp_jpeg_pay_setcaps;
263 gstrtpbasepayload_class->handle_buffer = gst_rtp_jpeg_pay_handle_buffer;
265 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_JPEG_QUALITY,
266 g_param_spec_int ("quality", "Quality",
267 "Quality factor on JPEG data (unused)", 0, 255, 255,
268 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
270 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_JPEG_TYPE,
271 g_param_spec_int ("type", "Type",
272 "Default JPEG Type, overwritten by SOF when present", 0, 255,
273 DEFAULT_JPEG_TYPE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
275 GST_DEBUG_CATEGORY_INIT (rtpjpegpay_debug, "rtpjpegpay", 0,
276 "Motion JPEG RTP Payloader");
280 gst_rtp_jpeg_pay_init (GstRtpJPEGPay * pay)
282 pay->quality = DEFAULT_JPEG_QUALITY;
283 pay->quant = DEFAULT_JPEG_QUANT;
284 pay->type = DEFAULT_JPEG_TYPE;
290 gst_rtp_jpeg_pay_setcaps (GstRTPBasePayload * basepayload, GstCaps * caps)
292 GstStructure *caps_structure = gst_caps_get_structure (caps, 0);
295 gint width = -1, height = -1;
301 pay = GST_RTP_JPEG_PAY (basepayload);
303 /* these properties are mandatory, but they might be adjusted by the SOF, if there
305 if (!gst_structure_get_int (caps_structure, "height", &height) || height <= 0) {
306 goto invalid_dimension;
309 if (!gst_structure_get_int (caps_structure, "width", &width) || width <= 0) {
310 goto invalid_dimension;
313 if (gst_structure_get_fraction (caps_structure, "framerate", &num, &denom) &&
314 (num < 0 || denom <= 0)) {
315 goto invalid_framerate;
318 if (height > 2040 || width > 2040) {
322 pay->height = GST_ROUND_UP_8 (height) / 8;
323 pay->width = GST_ROUND_UP_8 (width) / 8;
326 gst_rtp_base_payload_set_options (basepayload, "video", TRUE, "JPEG", 90000);
330 gst_util_fraction_to_double (num, denom, &framerate);
331 rate = g_strdup_printf ("%f", framerate);
334 size = g_strdup_printf ("%d-%d", width, height);
336 if (pay->width == 0) {
337 GST_DEBUG_OBJECT (pay,
338 "width or height are greater than 2040, adding x-dimensions to caps");
339 dim = g_strdup_printf ("%d,%d", width, height);
342 if (rate != NULL && dim != NULL) {
343 res = gst_rtp_base_payload_set_outcaps (basepayload, "a-framerate",
344 G_TYPE_STRING, rate, "a-framesize", G_TYPE_STRING, size,
345 "x-dimensions", G_TYPE_STRING, dim, NULL);
346 } else if (rate != NULL && dim == NULL) {
347 res = gst_rtp_base_payload_set_outcaps (basepayload, "a-framerate",
348 G_TYPE_STRING, rate, "a-framesize", G_TYPE_STRING, size, NULL);
349 } else if (rate == NULL && dim != NULL) {
350 res = gst_rtp_base_payload_set_outcaps (basepayload, "x-dimensions",
351 G_TYPE_STRING, dim, "a-framesize", G_TYPE_STRING, size, NULL);
353 res = gst_rtp_base_payload_set_outcaps (basepayload, "a-framesize",
354 G_TYPE_STRING, size, NULL);
368 GST_ERROR_OBJECT (pay, "Invalid width/height from caps");
373 GST_ERROR_OBJECT (pay, "Invalid framerate from caps");
379 gst_rtp_jpeg_pay_header_size (const guint8 * data, guint offset)
381 return data[offset] << 8 | data[offset + 1];
385 gst_rtp_jpeg_pay_read_quant_table (const guint8 * data, guint size,
386 guint offset, RtpQuantTable tables[])
388 guint quant_size, tab_size;
392 if (offset + 2 > size)
395 quant_size = gst_rtp_jpeg_pay_header_size (data, offset);
397 goto small_quant_size;
399 /* clamp to available data */
400 if (offset + quant_size > size)
401 quant_size = size - offset;
406 while (quant_size > 0) {
407 /* not enough to read the id */
408 if (offset + 1 > size)
411 id = data[offset] & 0x0f;
413 /* invalid id received - corrupt data */
416 prec = (data[offset] & 0xf0) >> 4;
422 /* there is not enough for the table */
423 if (quant_size < tab_size + 1)
426 GST_LOG ("read quant table %d, tab_size %d, prec %02x", id, tab_size, prec);
428 tables[id].size = tab_size;
429 tables[id].data = &data[offset + 1];
432 quant_size -= tab_size;
436 return offset + quant_size;
441 GST_WARNING ("not enough data");
446 GST_WARNING ("quant_size too small (%u < 2)", quant_size);
451 GST_WARNING ("invalid id");
456 GST_WARNING ("not enough data for table (%u < %u)", quant_size,
463 gst_rtp_jpeg_pay_read_sof (GstRtpJPEGPay * pay, const guint8 * data,
464 guint size, guint * offset, CompInfo info[], RtpQuantTable tables[],
465 gulong tables_elements)
468 guint width, height, infolen;
474 /* we need at least 17 bytes for the SOF */
478 sof_size = gst_rtp_jpeg_pay_header_size (data, off);
487 /* precision should be 8 */
488 if (data[off++] != 8)
491 /* read dimensions */
492 height = data[off] << 8 | data[off + 1];
493 width = data[off + 2] << 8 | data[off + 3];
496 GST_LOG_OBJECT (pay, "got dimensions %ux%u", height, width);
499 goto invalid_dimension;
505 goto invalid_dimension;
511 if (height == 0 || width == 0) {
515 pay->height = GST_ROUND_UP_8 (height) / 8;
516 pay->width = GST_ROUND_UP_8 (width) / 8;
519 /* we only support 3 components */
520 if (data[off++] != 3)
524 for (i = 0; i < 3; i++) {
525 elem.id = data[off++];
526 elem.samp = data[off++];
527 elem.qt = data[off++];
528 GST_LOG_OBJECT (pay, "got comp %d, samp %02x, qt %d", elem.id, elem.samp,
530 /* insertion sort from the last element to the first */
531 for (j = infolen; j > 1; j--) {
532 if (G_LIKELY (info[j - 1].id < elem.id))
534 info[j] = info[j - 1];
540 /* see that the components are supported */
541 if (info[0].samp == 0x21)
543 else if (info[0].samp == 0x22)
548 if (!(info[1].samp == 0x11))
551 if (!(info[2].samp == 0x11))
554 /* the other components are free to use any quant table but they have to
555 * have the same table id */
556 if (info[1].qt != info[2].qt) {
557 /* Some MJPG (like the one from the Logitech C-920 camera) uses different
558 * quant tables for component 1 and 2 but both tables contain the exact
559 * same data, so we could consider them as being the same tables */
560 if (!(info[1].qt < tables_elements &&
561 info[2].qt < tables_elements &&
562 tables[info[1].qt].size > 0 &&
563 tables[info[1].qt].size == tables[info[2].qt].size &&
564 memcmp (tables[info[1].qt].data, tables[info[2].qt].data,
565 tables[info[1].qt].size) == 0))
574 GST_ELEMENT_WARNING (pay, STREAM, FORMAT,
575 ("Wrong size %u (needed %u).", size, off + 17), (NULL));
580 GST_ELEMENT_WARNING (pay, STREAM, FORMAT,
581 ("Wrong SOF length %u.", sof_size), (NULL));
586 GST_ELEMENT_WARNING (pay, STREAM, FORMAT,
587 ("Wrong precision, expecting 8."), (NULL));
592 GST_ELEMENT_WARNING (pay, STREAM, FORMAT,
593 ("Wrong dimension, size %ux%u", width, height), (NULL));
598 GST_ELEMENT_WARNING (pay, STREAM, FORMAT,
599 ("Wrong number of components"), (NULL));
604 GST_ELEMENT_WARNING (pay, STREAM, FORMAT, ("Invalid component"), (NULL));
610 gst_rtp_jpeg_pay_read_dri (GstRtpJPEGPay * pay, const guint8 * data,
611 guint size, guint * offset, RtpRestartMarkerHeader * dri)
617 /* we need at least 4 bytes for the DRI */
621 dri_size = gst_rtp_jpeg_pay_header_size (data, off);
628 dri->restart_interval = g_htons ((data[off] << 8) | (data[off + 1]));
629 dri->restart_count = g_htons (0xFFFF);
631 return dri->restart_interval > 0;
635 GST_WARNING ("not enough data for DRI");
641 GST_WARNING ("DRI size too small (%u)", dri_size);
648 gst_rtp_jpeg_pay_scan_marker (const guint8 * data, guint size, guint * offset)
650 while ((data[(*offset)++] != JPEG_MARKER) && ((*offset) < size));
652 if (G_UNLIKELY ((*offset) >= size)) {
653 GST_LOG ("found EOI marker");
654 return JPEG_MARKER_EOI;
658 marker = data[*offset];
659 GST_LOG ("found 0x%02x marker at offset %u", marker, *offset);
666 gst_rtp_jpeg_pay_handle_buffer (GstRTPBasePayload * basepayload,
670 GstClockTime timestamp;
671 GstFlowReturn ret = GST_FLOW_ERROR;
672 RtpJpegHeader jpeg_header;
673 RtpQuantHeader quant_header;
674 RtpRestartMarkerHeader restart_marker_header;
675 RtpQuantTable tables[15] = { {0, NULL}, };
676 CompInfo info[3] = { {0,}, };
677 guint quant_data_size;
683 guint jpeg_header_size = 0;
686 gboolean sos_found, sof_found, dqt_found, dri_found;
688 GstBufferList *list = NULL;
690 pay = GST_RTP_JPEG_PAY (basepayload);
691 mtu = GST_RTP_BASE_PAYLOAD_MTU (pay);
693 gst_buffer_map (buffer, &map, GST_MAP_READ);
696 timestamp = GST_BUFFER_TIMESTAMP (buffer);
699 GST_LOG_OBJECT (pay, "got buffer size %" G_GSIZE_FORMAT
700 " , timestamp %" GST_TIME_FORMAT, size, GST_TIME_ARGS (timestamp));
702 /* parse the jpeg header for 'start of scan' and read quant tables if needed */
708 while (!sos_found && (offset < size)) {
709 GST_LOG_OBJECT (pay, "checking from offset %u", offset);
710 switch (gst_rtp_jpeg_pay_scan_marker (data, size, &offset)) {
711 case JPEG_MARKER_JFIF:
712 case JPEG_MARKER_CMT:
713 case JPEG_MARKER_DHT:
714 case JPEG_MARKER_H264:
715 GST_LOG_OBJECT (pay, "skipping marker");
716 offset += gst_rtp_jpeg_pay_header_size (data, offset);
718 case JPEG_MARKER_SOF:
719 if (!gst_rtp_jpeg_pay_read_sof (pay, data, size, &offset, info, tables,
720 G_N_ELEMENTS (tables)))
724 case JPEG_MARKER_DQT:
725 GST_LOG ("DQT found");
726 offset = gst_rtp_jpeg_pay_read_quant_table (data, size, offset, tables);
729 case JPEG_MARKER_SOS:
731 GST_LOG_OBJECT (pay, "SOS found");
732 jpeg_header_size = offset + gst_rtp_jpeg_pay_header_size (data, offset);
734 case JPEG_MARKER_EOI:
735 GST_WARNING_OBJECT (pay, "EOI reached before SOS!");
737 case JPEG_MARKER_SOI:
738 GST_LOG_OBJECT (pay, "SOI found");
740 case JPEG_MARKER_DRI:
741 GST_LOG_OBJECT (pay, "DRI found");
742 if (gst_rtp_jpeg_pay_read_dri (pay, data, size, &offset,
743 &restart_marker_header))
750 if (!dqt_found || !sof_found)
751 goto unsupported_jpeg;
753 /* by now we should either have negotiated the width/height or the SOF header
754 * should have filled us in */
755 if (pay->width < 0 || pay->height < 0) {
759 GST_LOG_OBJECT (pay, "header size %u", jpeg_header_size);
761 size -= jpeg_header_size;
762 data += jpeg_header_size;
768 /* prepare stuff for the jpeg header */
769 jpeg_header.type_spec = 0;
770 jpeg_header.type = pay->type;
771 jpeg_header.q = pay->quant;
772 jpeg_header.width = pay->width;
773 jpeg_header.height = pay->height;
775 /* collect the quant headers sizes */
776 quant_header.mbz = 0;
777 quant_header.precision = 0;
778 quant_header.length = 0;
781 if (pay->quant > 127) {
782 /* for the Y and U component, look up the quant table and its size. quant
783 * tables for U and V should be the same */
784 for (i = 0; i < 2; i++) {
789 if (qt >= G_N_ELEMENTS (tables))
792 qsize = tables[qt].size;
796 quant_header.precision |= (qsize == 64 ? 0 : (1 << i));
797 quant_data_size += qsize;
799 quant_header.length = g_htons (quant_data_size);
800 quant_data_size += sizeof (quant_header);
803 GST_LOG_OBJECT (pay, "quant_data size %u", quant_data_size);
805 list = gst_buffer_list_new ();
807 bytes_left = sizeof (jpeg_header) + quant_data_size + size;
810 bytes_left += sizeof (restart_marker_header);
816 guint payload_size = (bytes_left < mtu ? bytes_left : mtu);
819 GstRTPBuffer rtp = { NULL };
821 header_size = sizeof (jpeg_header) + quant_data_size;
823 header_size += sizeof (restart_marker_header);
825 outbuf = gst_rtp_buffer_new_allocate (header_size, 0, 0);
827 gst_rtp_buffer_map (outbuf, GST_MAP_WRITE, &rtp);
829 if (payload_size == bytes_left) {
830 GST_LOG_OBJECT (pay, "last packet of frame");
832 gst_rtp_buffer_set_marker (&rtp, 1);
835 payload = gst_rtp_buffer_get_payload (&rtp);
838 #if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
839 jpeg_header.offset = ((offset & 0x0000FF) << 16) |
840 ((offset & 0xFF0000) >> 16) | (offset & 0x00FF00);
842 jpeg_header.offset = offset;
844 memcpy (payload, &jpeg_header, sizeof (jpeg_header));
845 payload += sizeof (jpeg_header);
846 payload_size -= sizeof (jpeg_header);
849 memcpy (payload, &restart_marker_header, sizeof (restart_marker_header));
850 payload += sizeof (restart_marker_header);
851 payload_size -= sizeof (restart_marker_header);
854 /* only send quant table with first packet */
855 if (G_UNLIKELY (quant_data_size > 0)) {
856 memcpy (payload, &quant_header, sizeof (quant_header));
857 payload += sizeof (quant_header);
859 /* copy the quant tables for luma and chrominance */
860 for (i = 0; i < 2; i++) {
865 qsize = tables[qt].size;
866 memcpy (payload, tables[qt].data, qsize);
868 GST_LOG_OBJECT (pay, "component %d using quant %d, size %d", i, qt,
873 payload_size -= quant_data_size;
874 bytes_left -= quant_data_size;
877 GST_LOG_OBJECT (pay, "sending payload size %d", payload_size);
878 gst_rtp_buffer_unmap (&rtp);
880 /* create a new buf to hold the payload */
881 paybuf = gst_buffer_copy_region (buffer, GST_BUFFER_COPY_MEMORY,
882 jpeg_header_size + offset, payload_size);
884 /* join memory parts */
885 outbuf = gst_buffer_append (outbuf, paybuf);
887 GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
889 /* and add to list */
890 gst_buffer_list_insert (list, -1, outbuf);
892 bytes_left -= payload_size;
893 offset += payload_size;
894 data += payload_size;
898 /* push the whole buffer list at once */
899 ret = gst_rtp_base_payload_push_list (basepayload, list);
901 gst_buffer_unmap (buffer, &map);
902 gst_buffer_unref (buffer);
909 GST_ELEMENT_WARNING (pay, STREAM, FORMAT, ("Unsupported JPEG"), (NULL));
910 gst_buffer_unmap (buffer, &map);
911 gst_buffer_unref (buffer);
916 GST_ELEMENT_WARNING (pay, STREAM, FORMAT, ("No size given"), (NULL));
917 gst_buffer_unmap (buffer, &map);
918 gst_buffer_unref (buffer);
923 /* error was posted */
924 gst_buffer_unmap (buffer, &map);
925 gst_buffer_unref (buffer);
930 GST_ELEMENT_WARNING (pay, STREAM, FORMAT, ("Invalid quant tables"), (NULL));
931 gst_buffer_unmap (buffer, &map);
932 gst_buffer_unref (buffer);
938 gst_rtp_jpeg_pay_set_property (GObject * object, guint prop_id,
939 const GValue * value, GParamSpec * pspec)
941 GstRtpJPEGPay *rtpjpegpay;
943 rtpjpegpay = GST_RTP_JPEG_PAY (object);
946 case PROP_JPEG_QUALITY:
947 rtpjpegpay->quality = g_value_get_int (value);
948 GST_DEBUG_OBJECT (object, "quality = %d", rtpjpegpay->quality);
951 rtpjpegpay->type = g_value_get_int (value);
952 GST_DEBUG_OBJECT (object, "type = %d", rtpjpegpay->type);
955 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
961 gst_rtp_jpeg_pay_get_property (GObject * object, guint prop_id,
962 GValue * value, GParamSpec * pspec)
964 GstRtpJPEGPay *rtpjpegpay;
966 rtpjpegpay = GST_RTP_JPEG_PAY (object);
969 case PROP_JPEG_QUALITY:
970 g_value_set_int (value, rtpjpegpay->quality);
973 g_value_set_int (value, rtpjpegpay->type);
976 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
982 gst_rtp_jpeg_pay_plugin_init (GstPlugin * plugin)
984 return gst_element_register (plugin, "rtpjpegpay", GST_RANK_SECONDARY,
985 GST_TYPE_RTP_JPEG_PAY);