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, " " encoding-name = (string) \"JPEG\"")
61 GST_DEBUG_CATEGORY_STATIC (rtpjpegpay_debug);
62 #define GST_CAT_DEFAULT (rtpjpegpay_debug)
67 * Prefix length in the header before the quantization tables:
68 * Two size bytes and one byte for precision
70 #define QUANT_PREFIX_LEN 3
73 typedef enum _RtpJpegMarker RtpJpegMarker;
77 * @JPEG_MARKER: Prefix for JPEG marker
78 * @JPEG_MARKER_SOI: Start of Image marker
79 * @JPEG_MARKER_JFIF: JFIF marker
80 * @JPEG_MARKER_CMT: Comment marker
81 * @JPEG_MARKER_DQT: Define Quantization Table marker
82 * @JPEG_MARKER_SOF: Start of Frame marker
83 * @JPEG_MARKER_DHT: Define Huffman Table marker
84 * @JPEG_MARKER_SOS: Start of Scan marker
85 * @JPEG_MARKER_EOI: End of Image marker
86 * @JPEG_MARKER_DRI: Define Restart Interval marker
87 * @JPEG_MARKER_H264: H264 marker
89 * Identifers for markers in JPEG header
94 JPEG_MARKER_SOI = 0xD8,
95 JPEG_MARKER_JFIF = 0xE0,
96 JPEG_MARKER_CMT = 0xFE,
97 JPEG_MARKER_DQT = 0xDB,
98 JPEG_MARKER_SOF = 0xC0,
99 JPEG_MARKER_DHT = 0xC4,
100 JPEG_MARKER_SOS = 0xDA,
101 JPEG_MARKER_EOI = 0xD9,
102 JPEG_MARKER_DRI = 0xDD,
103 JPEG_MARKER_H264 = 0xE4
106 #define DEFAULT_JPEG_QUANT 255
108 #define DEFAULT_JPEG_QUALITY 255
109 #define DEFAULT_JPEG_TYPE 1
123 Q_TABLE_MAX /* only support for two tables at the moment */
126 typedef struct _RtpJpegHeader RtpJpegHeader;
130 * @type_spec: type specific
131 * @offset: fragment offset
133 * @q: quantization table for this frame
134 * @width: width of image in 8-pixel multiples
135 * @height: height of image in 8-pixel multiples
138 * 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
139 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
140 * | Type-specific | Fragment Offset |
141 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
142 * | Type | Q | Width | Height |
143 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
145 struct _RtpJpegHeader
158 * @precision: specify size of quantization tables
159 * @length: length of quantization data
162 * 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
163 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
164 * | MBZ | Precision | Length |
165 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
166 * | Quantization Table Data |
168 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
184 * RtpRestartMarkerHeader:
185 * @restartInterval: number of MCUs that appear between restart markers
186 * @restartFirstLastCount: a combination of the first packet mark in the chunk
187 * last packet mark in the chunk and the position of the
188 * first restart interval in the current "chunk"
191 * 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
192 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
193 * | Restart Interval |F|L| Restart Count |
194 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
196 * The restart marker header is implemented according to the following
197 * methodology specified in section 3.1.7 of rfc2435.txt.
199 * "If the restart intervals in a frame are not guaranteed to be aligned
200 * with packet boundaries, the F (first) and L (last) bits MUST be set
201 * to 1 and the Restart Count MUST be set to 0x3FFF. This indicates
202 * that a receiver MUST reassemble the entire frame before decoding it."
208 guint16 restart_interval;
209 guint16 restart_count;
210 } RtpRestartMarkerHeader;
219 /* FIXME: restart marker header currently unsupported */
221 static void gst_rtp_jpeg_pay_set_property (GObject * object, guint prop_id,
222 const GValue * value, GParamSpec * pspec);
224 static void gst_rtp_jpeg_pay_get_property (GObject * object, guint prop_id,
225 GValue * value, GParamSpec * pspec);
227 static gboolean gst_rtp_jpeg_pay_setcaps (GstRTPBasePayload * basepayload,
230 static GstFlowReturn gst_rtp_jpeg_pay_handle_buffer (GstRTPBasePayload * pad,
233 #define gst_rtp_jpeg_pay_parent_class parent_class
234 G_DEFINE_TYPE (GstRtpJPEGPay, gst_rtp_jpeg_pay, GST_TYPE_RTP_BASE_PAYLOAD);
237 gst_rtp_jpeg_pay_class_init (GstRtpJPEGPayClass * klass)
239 GObjectClass *gobject_class;
240 GstElementClass *gstelement_class;
241 GstRTPBasePayloadClass *gstrtpbasepayload_class;
243 gobject_class = (GObjectClass *) klass;
244 gstelement_class = (GstElementClass *) klass;
245 gstrtpbasepayload_class = (GstRTPBasePayloadClass *) klass;
247 gobject_class->set_property = gst_rtp_jpeg_pay_set_property;
248 gobject_class->get_property = gst_rtp_jpeg_pay_get_property;
250 gst_element_class_add_pad_template (gstelement_class,
251 gst_static_pad_template_get (&gst_rtp_jpeg_pay_src_template));
252 gst_element_class_add_pad_template (gstelement_class,
253 gst_static_pad_template_get (&gst_rtp_jpeg_pay_sink_template));
255 gst_element_class_set_static_metadata (gstelement_class, "RTP JPEG payloader",
256 "Codec/Payloader/Network/RTP",
257 "Payload-encodes JPEG pictures into RTP packets (RFC 2435)",
258 "Axis Communications <dev-gstreamer@axis.com>");
260 gstrtpbasepayload_class->set_caps = gst_rtp_jpeg_pay_setcaps;
261 gstrtpbasepayload_class->handle_buffer = gst_rtp_jpeg_pay_handle_buffer;
263 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_JPEG_QUALITY,
264 g_param_spec_int ("quality", "Quality",
265 "Quality factor on JPEG data (unused)", 0, 255, 255,
266 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
268 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_JPEG_TYPE,
269 g_param_spec_int ("type", "Type",
270 "Default JPEG Type, overwritten by SOF when present", 0, 255,
271 DEFAULT_JPEG_TYPE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
273 GST_DEBUG_CATEGORY_INIT (rtpjpegpay_debug, "rtpjpegpay", 0,
274 "Motion JPEG RTP Payloader");
278 gst_rtp_jpeg_pay_init (GstRtpJPEGPay * pay)
280 pay->quality = DEFAULT_JPEG_QUALITY;
281 pay->quant = DEFAULT_JPEG_QUANT;
282 pay->type = DEFAULT_JPEG_TYPE;
288 gst_rtp_jpeg_pay_setcaps (GstRTPBasePayload * basepayload, GstCaps * caps)
290 GstStructure *caps_structure = gst_caps_get_structure (caps, 0);
293 gint width = -1, height = -1;
298 pay = GST_RTP_JPEG_PAY (basepayload);
300 /* these properties are not mandatory, we can get them from the SOF, if there
302 if (gst_structure_get_int (caps_structure, "height", &height)) {
304 goto invalid_dimension;
308 if (gst_structure_get_int (caps_structure, "width", &width)) {
310 goto invalid_dimension;
314 if (gst_structure_get_fraction (caps_structure, "framerate", &num, &denom) &&
315 (num < 0 || denom <= 0)) {
316 goto invalid_framerate;
319 if (height > 2040 || width > 2040) {
323 pay->height = GST_ROUND_UP_8 (height) / 8;
324 pay->width = GST_ROUND_UP_8 (width) / 8;
327 gst_rtp_base_payload_set_options (basepayload, "video", TRUE, "JPEG", 90000);
332 gst_util_fraction_to_double (num, denom, &framerate);
333 rate = g_strdup_printf("%f", framerate);
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, "x-dimensions", G_TYPE_STRING, dim, NULL);
345 } else if (rate != NULL && dim == NULL) {
346 res = gst_rtp_base_payload_set_outcaps (basepayload, "a-framerate",
347 G_TYPE_STRING, rate, NULL);
348 } else if (rate == NULL && dim != NULL) {
349 res = gst_rtp_base_payload_set_outcaps (basepayload, "x-dimensions",
350 G_TYPE_STRING, dim, NULL);
352 res = gst_rtp_base_payload_set_outcaps (basepayload, NULL);
365 GST_ERROR_OBJECT (pay, "Invalid width/height from caps");
370 GST_ERROR_OBJECT (pay, "Invalid framerate from caps");
376 gst_rtp_jpeg_pay_header_size (const guint8 * data, guint offset)
378 return data[offset] << 8 | data[offset + 1];
382 gst_rtp_jpeg_pay_read_quant_table (const guint8 * data, guint size,
383 guint offset, RtpQuantTable tables[])
385 guint quant_size, tab_size;
389 if (offset + 2 > size)
392 quant_size = gst_rtp_jpeg_pay_header_size (data, offset);
394 goto small_quant_size;
396 /* clamp to available data */
397 if (offset + quant_size > size)
398 quant_size = size - offset;
403 while (quant_size > 0) {
404 /* not enough to read the id */
405 if (offset + 1 > size)
408 id = data[offset] & 0x0f;
410 /* invalid id received - corrupt data */
413 prec = (data[offset] & 0xf0) >> 4;
419 /* there is not enough for the table */
420 if (quant_size < tab_size + 1)
423 GST_LOG ("read quant table %d, tab_size %d, prec %02x", id, tab_size, prec);
425 tables[id].size = tab_size;
426 tables[id].data = &data[offset + 1];
429 quant_size -= tab_size;
433 return offset + quant_size;
438 GST_WARNING ("not enough data");
443 GST_WARNING ("quant_size too small (%u < 2)", quant_size);
448 GST_WARNING ("invalid id");
453 GST_WARNING ("not enough data for table (%u < %u)", quant_size,
460 gst_rtp_jpeg_pay_read_sof (GstRtpJPEGPay * pay, const guint8 * data,
461 guint size, guint * offset, CompInfo info[], RtpQuantTable tables[],
462 gulong tables_elements)
465 guint width, height, infolen;
471 /* we need at least 17 bytes for the SOF */
475 sof_size = gst_rtp_jpeg_pay_header_size (data, off);
484 /* precision should be 8 */
485 if (data[off++] != 8)
488 /* read dimensions */
489 height = data[off] << 8 | data[off + 1];
490 width = data[off + 2] << 8 | data[off + 3];
493 GST_LOG_OBJECT (pay, "got dimensions %ux%u", height, width);
496 goto invalid_dimension;
502 goto invalid_dimension;
508 if (height == 0 || width == 0) {
512 pay->height = GST_ROUND_UP_8 (height) / 8;
513 pay->width = GST_ROUND_UP_8 (width) / 8;
516 /* we only support 3 components */
517 if (data[off++] != 3)
521 for (i = 0; i < 3; i++) {
522 elem.id = data[off++];
523 elem.samp = data[off++];
524 elem.qt = data[off++];
525 GST_LOG_OBJECT (pay, "got comp %d, samp %02x, qt %d", elem.id, elem.samp,
527 /* insertion sort from the last element to the first */
528 for (j = infolen; j > 1; j--) {
529 if (G_LIKELY (info[j - 1].id < elem.id))
531 info[j] = info[j - 1];
537 /* see that the components are supported */
538 if (info[0].samp == 0x21)
540 else if (info[0].samp == 0x22)
545 if (!(info[1].samp == 0x11))
548 if (!(info[2].samp == 0x11))
551 /* the other components are free to use any quant table but they have to
552 * have the same table id */
553 if (info[1].qt != info[2].qt) {
554 /* Some MJPG (like the one from the Logitech C-920 camera) uses different
555 * quant tables for component 1 and 2 but both tables contain the exact
556 * same data, so we could consider them as being the same tables */
557 if (!(info[1].qt < tables_elements &&
558 info[2].qt < tables_elements &&
559 tables[info[1].qt].size > 0 &&
560 tables[info[1].qt].size == tables[info[2].qt].size &&
561 memcmp (tables[info[1].qt].data, tables[info[2].qt].data,
562 tables[info[1].qt].size) == 0))
571 GST_ELEMENT_ERROR (pay, STREAM, FORMAT,
572 ("Wrong size %u (needed %u).", size, off + 17), (NULL));
577 GST_ELEMENT_ERROR (pay, STREAM, FORMAT,
578 ("Wrong SOF length %u.", sof_size), (NULL));
583 GST_ELEMENT_ERROR (pay, STREAM, FORMAT,
584 ("Wrong precision, expecting 8."), (NULL));
589 GST_ELEMENT_ERROR (pay, STREAM, FORMAT,
590 ("Wrong dimension, size %ux%u", width, height), (NULL));
595 GST_ELEMENT_ERROR (pay, STREAM, FORMAT,
596 ("Wrong number of components"), (NULL));
601 GST_ELEMENT_ERROR (pay, STREAM, FORMAT, ("Invalid component"), (NULL));
607 gst_rtp_jpeg_pay_read_dri (GstRtpJPEGPay * pay, const guint8 * data,
608 guint size, guint * offset, RtpRestartMarkerHeader * dri)
614 /* we need at least 4 bytes for the DRI */
618 dri_size = gst_rtp_jpeg_pay_header_size (data, off);
625 dri->restart_interval = g_htons ((data[off] << 8) | (data[off + 1]));
626 dri->restart_count = g_htons (0xFFFF);
628 return dri->restart_interval > 0;
632 GST_WARNING ("not enough data for DRI");
638 GST_WARNING ("DRI size too small (%u)", dri_size);
645 gst_rtp_jpeg_pay_scan_marker (const guint8 * data, guint size, guint * offset)
647 while ((data[(*offset)++] != JPEG_MARKER) && ((*offset) < size));
649 if (G_UNLIKELY ((*offset) >= size)) {
650 GST_LOG ("found EOI marker");
651 return JPEG_MARKER_EOI;
655 marker = data[*offset];
656 GST_LOG ("found 0x%02x marker at offset %u", marker, *offset);
663 gst_rtp_jpeg_pay_handle_buffer (GstRTPBasePayload * basepayload,
667 GstClockTime timestamp;
668 GstFlowReturn ret = GST_FLOW_ERROR;
669 RtpJpegHeader jpeg_header;
670 RtpQuantHeader quant_header;
671 RtpRestartMarkerHeader restart_marker_header;
672 RtpQuantTable tables[15] = { {0, NULL}, };
673 CompInfo info[3] = { {0,}, };
674 guint quant_data_size;
680 guint jpeg_header_size = 0;
683 gboolean sos_found, sof_found, dqt_found, dri_found;
685 GstBufferList *list = NULL;
687 pay = GST_RTP_JPEG_PAY (basepayload);
688 mtu = GST_RTP_BASE_PAYLOAD_MTU (pay);
690 gst_buffer_map (buffer, &map, GST_MAP_READ);
693 timestamp = GST_BUFFER_TIMESTAMP (buffer);
696 GST_LOG_OBJECT (pay, "got buffer size %" G_GSIZE_FORMAT
697 " , timestamp %" GST_TIME_FORMAT, size, GST_TIME_ARGS (timestamp));
699 /* parse the jpeg header for 'start of scan' and read quant tables if needed */
705 while (!sos_found && (offset < size)) {
706 GST_LOG_OBJECT (pay, "checking from offset %u", offset);
707 switch (gst_rtp_jpeg_pay_scan_marker (data, size, &offset)) {
708 case JPEG_MARKER_JFIF:
709 case JPEG_MARKER_CMT:
710 case JPEG_MARKER_DHT:
711 case JPEG_MARKER_H264:
712 GST_LOG_OBJECT (pay, "skipping marker");
713 offset += gst_rtp_jpeg_pay_header_size (data, offset);
715 case JPEG_MARKER_SOF:
716 if (!gst_rtp_jpeg_pay_read_sof (pay, data, size, &offset, info, tables,
717 G_N_ELEMENTS (tables)))
721 case JPEG_MARKER_DQT:
722 GST_LOG ("DQT found");
723 offset = gst_rtp_jpeg_pay_read_quant_table (data, size, offset, tables);
726 case JPEG_MARKER_SOS:
728 GST_LOG_OBJECT (pay, "SOS found");
729 jpeg_header_size = offset + gst_rtp_jpeg_pay_header_size (data, offset);
731 case JPEG_MARKER_EOI:
732 GST_WARNING_OBJECT (pay, "EOI reached before SOS!");
734 case JPEG_MARKER_SOI:
735 GST_LOG_OBJECT (pay, "SOI found");
737 case JPEG_MARKER_DRI:
738 GST_LOG_OBJECT (pay, "DRI found");
739 if (gst_rtp_jpeg_pay_read_dri (pay, data, size, &offset,
740 &restart_marker_header))
747 if (!dqt_found || !sof_found)
748 goto unsupported_jpeg;
750 /* by now we should either have negotiated the width/height or the SOF header
751 * should have filled us in */
752 if (pay->width < 0 || pay->height < 0) {
756 GST_LOG_OBJECT (pay, "header size %u", jpeg_header_size);
758 size -= jpeg_header_size;
759 data += jpeg_header_size;
765 /* prepare stuff for the jpeg header */
766 jpeg_header.type_spec = 0;
767 jpeg_header.type = pay->type;
768 jpeg_header.q = pay->quant;
769 jpeg_header.width = pay->width;
770 jpeg_header.height = pay->height;
772 /* collect the quant headers sizes */
773 quant_header.mbz = 0;
774 quant_header.precision = 0;
775 quant_header.length = 0;
778 if (pay->quant > 127) {
779 /* for the Y and U component, look up the quant table and its size. quant
780 * tables for U and V should be the same */
781 for (i = 0; i < 2; i++) {
786 if (qt >= G_N_ELEMENTS (tables))
789 qsize = tables[qt].size;
793 quant_header.precision |= (qsize == 64 ? 0 : (1 << i));
794 quant_data_size += qsize;
796 quant_header.length = g_htons (quant_data_size);
797 quant_data_size += sizeof (quant_header);
800 GST_LOG_OBJECT (pay, "quant_data size %u", quant_data_size);
802 list = gst_buffer_list_new ();
804 bytes_left = sizeof (jpeg_header) + quant_data_size + size;
807 bytes_left += sizeof (restart_marker_header);
813 guint payload_size = (bytes_left < mtu ? bytes_left : mtu);
816 GstRTPBuffer rtp = { NULL };
818 header_size = sizeof (jpeg_header) + quant_data_size;
820 header_size += sizeof (restart_marker_header);
822 outbuf = gst_rtp_buffer_new_allocate (header_size, 0, 0);
824 gst_rtp_buffer_map (outbuf, GST_MAP_WRITE, &rtp);
826 if (payload_size == bytes_left) {
827 GST_LOG_OBJECT (pay, "last packet of frame");
829 gst_rtp_buffer_set_marker (&rtp, 1);
832 payload = gst_rtp_buffer_get_payload (&rtp);
835 #if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
836 jpeg_header.offset = ((offset & 0x0000FF) << 16) |
837 ((offset & 0xFF0000) >> 16) | (offset & 0x00FF00);
839 jpeg_header.offset = offset;
841 memcpy (payload, &jpeg_header, sizeof (jpeg_header));
842 payload += sizeof (jpeg_header);
843 payload_size -= sizeof (jpeg_header);
846 memcpy (payload, &restart_marker_header, sizeof (restart_marker_header));
847 payload += sizeof (restart_marker_header);
848 payload_size -= sizeof (restart_marker_header);
851 /* only send quant table with first packet */
852 if (G_UNLIKELY (quant_data_size > 0)) {
853 memcpy (payload, &quant_header, sizeof (quant_header));
854 payload += sizeof (quant_header);
856 /* copy the quant tables for luma and chrominance */
857 for (i = 0; i < 2; i++) {
862 qsize = tables[qt].size;
863 memcpy (payload, tables[qt].data, qsize);
865 GST_LOG_OBJECT (pay, "component %d using quant %d, size %d", i, qt,
870 payload_size -= quant_data_size;
871 bytes_left -= quant_data_size;
874 GST_LOG_OBJECT (pay, "sending payload size %d", payload_size);
875 gst_rtp_buffer_unmap (&rtp);
877 /* create a new buf to hold the payload */
878 paybuf = gst_buffer_copy_region (buffer, GST_BUFFER_COPY_MEMORY,
879 jpeg_header_size + offset, payload_size);
881 /* join memory parts */
882 outbuf = gst_buffer_append (outbuf, paybuf);
884 GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
886 /* and add to list */
887 gst_buffer_list_insert (list, -1, outbuf);
889 bytes_left -= payload_size;
890 offset += payload_size;
891 data += payload_size;
895 /* push the whole buffer list at once */
896 ret = gst_rtp_base_payload_push_list (basepayload, list);
898 gst_buffer_unmap (buffer, &map);
899 gst_buffer_unref (buffer);
906 GST_ELEMENT_ERROR (pay, STREAM, FORMAT, ("Unsupported JPEG"), (NULL));
907 gst_buffer_unmap (buffer, &map);
908 gst_buffer_unref (buffer);
909 return GST_FLOW_NOT_SUPPORTED;
913 GST_ELEMENT_ERROR (pay, STREAM, FORMAT, ("No size given"), (NULL));
914 gst_buffer_unmap (buffer, &map);
915 gst_buffer_unref (buffer);
916 return GST_FLOW_NOT_NEGOTIATED;
920 /* error was posted */
921 gst_buffer_unmap (buffer, &map);
922 gst_buffer_unref (buffer);
923 return GST_FLOW_ERROR;
927 GST_ELEMENT_ERROR (pay, STREAM, FORMAT, ("Invalid quant tables"), (NULL));
928 gst_buffer_unmap (buffer, &map);
929 gst_buffer_unref (buffer);
930 return GST_FLOW_ERROR;
935 gst_rtp_jpeg_pay_set_property (GObject * object, guint prop_id,
936 const GValue * value, GParamSpec * pspec)
938 GstRtpJPEGPay *rtpjpegpay;
940 rtpjpegpay = GST_RTP_JPEG_PAY (object);
943 case PROP_JPEG_QUALITY:
944 rtpjpegpay->quality = g_value_get_int (value);
945 GST_DEBUG_OBJECT (object, "quality = %d", rtpjpegpay->quality);
948 rtpjpegpay->type = g_value_get_int (value);
949 GST_DEBUG_OBJECT (object, "type = %d", rtpjpegpay->type);
952 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
958 gst_rtp_jpeg_pay_get_property (GObject * object, guint prop_id,
959 GValue * value, GParamSpec * pspec)
961 GstRtpJPEGPay *rtpjpegpay;
963 rtpjpegpay = GST_RTP_JPEG_PAY (object);
966 case PROP_JPEG_QUALITY:
967 g_value_set_int (value, rtpjpegpay->quality);
970 g_value_set_int (value, rtpjpegpay->type);
973 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
979 gst_rtp_jpeg_pay_plugin_init (GstPlugin * plugin)
981 return gst_element_register (plugin, "rtpjpegpay", GST_RANK_SECONDARY,
982 GST_TYPE_RTP_JPEG_PAY);