/* GStreamer * Copyright (C) 2008 Axis Communications * @author Bjorn Ostby * @author Peter Kjellerstedt * * 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. */ /** * SECTION:element-rtpjpegpay * * Payload encode JPEG pictures into RTP packets according to RFC 2435. * For detailed information see: http://www.rfc-editor.org/rfc/rfc2435.txt * * The payloader takes a JPEG picture, scans the header for quantization * tables (if needed) and constructs the RTP packet header followed by * the actual JPEG entropy scan. * * The payloader assumes that correct width and height is found in the caps. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include "gstrtpjpegpay.h" static GstStaticPadTemplate gst_rtp_jpeg_pay_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("image/jpeg; " "video/x-jpeg") ); static GstStaticPadTemplate gst_rtp_jpeg_pay_src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("application/x-rtp, " " media = (string) \"video\", " " payload = (int) 26 , " " clock-rate = (int) 90000, " " encoding-name = (string) \"JPEG\"") ); GST_DEBUG_CATEGORY_STATIC (rtpjpegpay_debug); #define GST_CAT_DEFAULT (rtpjpegpay_debug) /* * QUANT_PREFIX_LEN: * * Prefix length in the header before the quantization tables: * Two size bytes and one byte for precision */ #define QUANT_PREFIX_LEN 3 /* * DEFAULT_BUFFER_LIST: * */ #define DEFAULT_BUFFER_LIST FALSE typedef enum _RtpJpegMarker RtpJpegMarker; /* * RtpJpegMarker: * @JPEG_MARKER: Prefix for JPEG marker * @JPEG_MARKER_SOI: Start of Image marker * @JPEG_MARKER_JFIF: JFIF marker * @JPEG_MARKER_CMT: Comment marker * @JPEG_MARKER_DQT: Define Quantization Table marker * @JPEG_MARKER_SOF: Start of Frame marker * @JPEG_MARKER_DHT: Define Huffman Table marker * @JPEG_MARKER_SOS: Start of Scan marker * @JPEG_MARKER_EOI: End of Image marker * @JPEG_MARKER_DRI: Define Restart Interval marker * @JPEG_MARKER_H264: H264 marker * * Identifers for markers in JPEG header */ enum _RtpJpegMarker { JPEG_MARKER = 0xFF, JPEG_MARKER_SOI = 0xD8, JPEG_MARKER_JFIF = 0xE0, JPEG_MARKER_CMT = 0xFE, JPEG_MARKER_DQT = 0xDB, JPEG_MARKER_SOF = 0xC0, JPEG_MARKER_DHT = 0xC4, JPEG_MARKER_SOS = 0xDA, JPEG_MARKER_EOI = 0xD9, JPEG_MARKER_DRI = 0xDD, JPEG_MARKER_H264 = 0xE4 }; #define DEFAULT_JPEG_QUANT 255 #define DEFAULT_JPEG_QUALITY 255 #define DEFAULT_JPEG_TYPE 1 enum { PROP_0, PROP_JPEG_QUALITY, PROP_JPEG_TYPE, PROP_BUFFER_LIST, PROP_LAST }; enum { Q_TABLE_0 = 0, Q_TABLE_1, Q_TABLE_MAX /* only support for two tables at the moment */ }; typedef struct _RtpJpegHeader RtpJpegHeader; /* * RtpJpegHeader: * @type_spec: type specific * @offset: fragment offset * @type: type field * @q: quantization table for this frame * @width: width of image in 8-pixel multiples * @height: height of image in 8-pixel multiples * * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Type-specific | Fragment Offset | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Type | Q | Width | Height | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ struct _RtpJpegHeader { guint type_spec:8; guint offset:24; guint8 type; guint8 q; guint8 width; guint8 height; }; /* * RtpQuantHeader * @mbz: must be zero * @precision: specify size of quantization tables * @length: length of quantization data * * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | MBZ | Precision | Length | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Quantization Table Data | * | ... | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ typedef struct { guint8 mbz; guint8 precision; guint16 length; } RtpQuantHeader; typedef struct { guint8 size; const guint8 *data; } RtpQuantTable; /* * RtpRestartMarkerHeader: * @restartInterval: number of MCUs that appear between restart markers * @restartFirstLastCount: a combination of the first packet mark in the chunk * last packet mark in the chunk and the position of the * first restart interval in the current "chunk" * * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Restart Interval |F|L| Restart Count | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * * The restart marker header is implemented according to the following * methodology specified in section 3.1.7 of rfc2435.txt. * * "If the restart intervals in a frame are not guaranteed to be aligned * with packet boundaries, the F (first) and L (last) bits MUST be set * to 1 and the Restart Count MUST be set to 0x3FFF. This indicates * that a receiver MUST reassemble the entire frame before decoding it." * */ typedef struct { guint16 restart_interval; guint16 restart_count; } RtpRestartMarkerHeader; typedef struct { guint8 id; guint8 samp; guint8 qt; } CompInfo; /* FIXME: restart marker header currently unsupported */ static void gst_rtp_jpeg_pay_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_rtp_jpeg_pay_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static gboolean gst_rtp_jpeg_pay_setcaps (GstRTPBasePayload * basepayload, GstCaps * caps); static GstFlowReturn gst_rtp_jpeg_pay_handle_buffer (GstRTPBasePayload * pad, GstBuffer * buffer); #define gst_rtp_jpeg_pay_parent_class parent_class G_DEFINE_TYPE (GstRtpJPEGPay, gst_rtp_jpeg_pay, GST_TYPE_RTP_BASE_PAYLOAD); static void gst_rtp_jpeg_pay_class_init (GstRtpJPEGPayClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; GstRTPBasePayloadClass *gstrtpbasepayload_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gstrtpbasepayload_class = (GstRTPBasePayloadClass *) klass; gobject_class->set_property = gst_rtp_jpeg_pay_set_property; gobject_class->get_property = gst_rtp_jpeg_pay_get_property; gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&gst_rtp_jpeg_pay_src_template)); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&gst_rtp_jpeg_pay_sink_template)); gst_element_class_set_static_metadata (gstelement_class, "RTP JPEG payloader", "Codec/Payloader/Network/RTP", "Payload-encodes JPEG pictures into RTP packets (RFC 2435)", "Axis Communications "); gstrtpbasepayload_class->set_caps = gst_rtp_jpeg_pay_setcaps; gstrtpbasepayload_class->handle_buffer = gst_rtp_jpeg_pay_handle_buffer; g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_JPEG_QUALITY, g_param_spec_int ("quality", "Quality", "Quality factor on JPEG data (unused)", 0, 255, 255, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_JPEG_TYPE, g_param_spec_int ("type", "Type", "Default JPEG Type, overwritten by SOF when present", 0, 255, DEFAULT_JPEG_TYPE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BUFFER_LIST, g_param_spec_boolean ("buffer-list", "Buffer List", "Use Buffer Lists", DEFAULT_BUFFER_LIST, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); GST_DEBUG_CATEGORY_INIT (rtpjpegpay_debug, "rtpjpegpay", 0, "Motion JPEG RTP Payloader"); } static void gst_rtp_jpeg_pay_init (GstRtpJPEGPay * pay) { pay->quality = DEFAULT_JPEG_QUALITY; pay->quant = DEFAULT_JPEG_QUANT; pay->type = DEFAULT_JPEG_TYPE; pay->buffer_list = DEFAULT_BUFFER_LIST; } static gboolean gst_rtp_jpeg_pay_setcaps (GstRTPBasePayload * basepayload, GstCaps * caps) { GstStructure *caps_structure = gst_caps_get_structure (caps, 0); GstRtpJPEGPay *pay; gboolean res; gint width = 0, height = 0; pay = GST_RTP_JPEG_PAY (basepayload); /* these properties are not mandatory, we can get them from the SOF, if there * is one. */ if (gst_structure_get_int (caps_structure, "height", &height)) { if (height <= 0 || height > 2040) goto invalid_dimension; } pay->height = GST_ROUND_UP_8 (height) / 8; if (gst_structure_get_int (caps_structure, "width", &width)) { if (width <= 0 || width > 2040) goto invalid_dimension; } pay->width = GST_ROUND_UP_8 (width) / 8; gst_rtp_base_payload_set_options (basepayload, "video", TRUE, "JPEG", 90000); res = gst_rtp_base_payload_set_outcaps (basepayload, NULL); return res; /* ERRORS */ invalid_dimension: { GST_ERROR_OBJECT (pay, "Invalid width/height from caps"); return FALSE; } } static guint gst_rtp_jpeg_pay_header_size (const guint8 * data, guint offset) { return data[offset] << 8 | data[offset + 1]; } static guint gst_rtp_jpeg_pay_read_quant_table (const guint8 * data, guint size, guint offset, RtpQuantTable tables[]) { guint quant_size, tab_size; guint8 prec; guint8 id; if (offset + 2 > size) goto too_small; quant_size = gst_rtp_jpeg_pay_header_size (data, offset); if (quant_size < 2) goto small_quant_size; /* clamp to available data */ if (offset + quant_size > size) quant_size = size - offset; offset += 2; quant_size -= 2; while (quant_size > 0) { /* not enough to read the id */ if (offset + 1 > size) break; id = data[offset] & 0x0f; if (id == 15) /* invalid id received - corrupt data */ goto invalid_id; prec = (data[offset] & 0xf0) >> 4; if (prec) tab_size = 128; else tab_size = 64; /* there is not enough for the table */ if (quant_size < tab_size + 1) goto no_table; GST_LOG ("read quant table %d, tab_size %d, prec %02x", id, tab_size, prec); tables[id].size = tab_size; tables[id].data = &data[offset + 1]; tab_size += 1; quant_size -= tab_size; offset += tab_size; } done: return offset + quant_size; /* ERRORS */ too_small: { GST_WARNING ("not enough data"); return size; } small_quant_size: { GST_WARNING ("quant_size too small (%u < 2)", quant_size); return size; } invalid_id: { GST_WARNING ("invalid id"); goto done; } no_table: { GST_WARNING ("not enough data for table (%u < %u)", quant_size, tab_size + 1); goto done; } } static gboolean gst_rtp_jpeg_pay_read_sof (GstRtpJPEGPay * pay, const guint8 * data, guint size, guint * offset, CompInfo info[]) { guint sof_size, off; guint width, height, infolen; CompInfo elem; gint i, j; off = *offset; /* we need at least 17 bytes for the SOF */ if (off + 17 > size) goto wrong_size; sof_size = gst_rtp_jpeg_pay_header_size (data, off); if (sof_size < 17) goto wrong_length; *offset += sof_size; /* skip size */ off += 2; /* precision should be 8 */ if (data[off++] != 8) goto bad_precision; /* read dimensions */ height = data[off] << 8 | data[off + 1]; width = data[off + 2] << 8 | data[off + 3]; off += 4; GST_LOG_OBJECT (pay, "got dimensions %ux%u", height, width); if (height == 0 || height > 2040) goto invalid_dimension; if (width == 0 || width > 2040) goto invalid_dimension; pay->height = GST_ROUND_UP_8 (height) / 8; pay->width = GST_ROUND_UP_8 (width) / 8; /* we only support 3 components */ if (data[off++] != 3) goto bad_components; infolen = 0; for (i = 0; i < 3; i++) { elem.id = data[off++]; elem.samp = data[off++]; elem.qt = data[off++]; GST_LOG_OBJECT (pay, "got comp %d, samp %02x, qt %d", elem.id, elem.samp, elem.qt); /* insertion sort from the last element to the first */ for (j = infolen; j > 1; j--) { if (G_LIKELY (info[j - 1].id < elem.id)) break; info[j] = info[j - 1]; } info[j] = elem; infolen++; } /* see that the components are supported */ if (info[0].samp == 0x21) pay->type = 0; else if (info[0].samp == 0x22) pay->type = 1; else goto invalid_comp; if (!(info[1].samp == 0x11)) goto invalid_comp; if (!(info[2].samp == 0x11)) goto invalid_comp; /* the other components are free to use any quant table but they have to * have the same table id */ if (info[1].qt != info[2].qt) goto invalid_comp; return TRUE; /* ERRORS */ wrong_size: { GST_ELEMENT_ERROR (pay, STREAM, FORMAT, ("Wrong size %u (needed %u).", size, off + 17), (NULL)); return FALSE; } wrong_length: { GST_ELEMENT_ERROR (pay, STREAM, FORMAT, ("Wrong SOF length %u.", sof_size), (NULL)); return FALSE; } bad_precision: { GST_ELEMENT_ERROR (pay, STREAM, FORMAT, ("Wrong precision, expecting 8."), (NULL)); return FALSE; } invalid_dimension: { GST_ELEMENT_ERROR (pay, STREAM, FORMAT, ("Wrong dimension, size %ux%u", width, height), (NULL)); return FALSE; } bad_components: { GST_ELEMENT_ERROR (pay, STREAM, FORMAT, ("Wrong number of components"), (NULL)); return FALSE; } invalid_comp: { GST_ELEMENT_ERROR (pay, STREAM, FORMAT, ("Invalid component"), (NULL)); return FALSE; } } static gboolean gst_rtp_jpeg_pay_read_dri (GstRtpJPEGPay * pay, const guint8 * data, guint size, guint * offset, RtpRestartMarkerHeader * dri) { guint dri_size, off; off = *offset; /* we need at least 4 bytes for the DRI */ if (off + 4 > size) goto wrong_size; dri_size = gst_rtp_jpeg_pay_header_size (data, off); if (dri_size < 4) goto wrong_length; *offset += dri_size; off += 2; dri->restart_interval = g_htons ((data[off] << 8) | (data[off + 1])); dri->restart_count = g_htons (0xFFFF); return dri->restart_interval > 0; wrong_size: { GST_WARNING ("not enough data for DRI"); *offset = size; return FALSE; } wrong_length: { GST_WARNING ("DRI size too small (%u)", dri_size); *offset += dri_size; return FALSE; } } static RtpJpegMarker gst_rtp_jpeg_pay_scan_marker (const guint8 * data, guint size, guint * offset) { while ((data[(*offset)++] != JPEG_MARKER) && ((*offset) < size)); if (G_UNLIKELY ((*offset) >= size)) { GST_LOG ("found EOI marker"); return JPEG_MARKER_EOI; } else { guint8 marker; marker = data[*offset]; GST_LOG ("found 0x%02x marker at offset %u", marker, *offset); (*offset)++; return marker; } } static GstFlowReturn gst_rtp_jpeg_pay_handle_buffer (GstRTPBasePayload * basepayload, GstBuffer * buffer) { GstRtpJPEGPay *pay; GstClockTime timestamp; GstFlowReturn ret = GST_FLOW_ERROR; RtpJpegHeader jpeg_header; RtpQuantHeader quant_header; RtpRestartMarkerHeader restart_marker_header; RtpQuantTable tables[15] = { {0, NULL}, }; CompInfo info[3] = { {0,}, }; guint quant_data_size; GstMapInfo map; guint8 *data; gsize size; guint mtu; guint bytes_left; guint jpeg_header_size = 0; guint offset; gboolean frame_done; gboolean sos_found, sof_found, dqt_found, dri_found; gint i; GstBufferList *list = NULL; pay = GST_RTP_JPEG_PAY (basepayload); mtu = GST_RTP_BASE_PAYLOAD_MTU (pay); gst_buffer_map (buffer, &map, GST_MAP_READ); data = map.data; size = map.size; timestamp = GST_BUFFER_TIMESTAMP (buffer); offset = 0; GST_LOG_OBJECT (pay, "got buffer size %" G_GSIZE_FORMAT " , timestamp %" GST_TIME_FORMAT, size, GST_TIME_ARGS (timestamp)); /* parse the jpeg header for 'start of scan' and read quant tables if needed */ sos_found = FALSE; dqt_found = FALSE; sof_found = FALSE; dri_found = FALSE; while (!sos_found && (offset < size)) { GST_LOG_OBJECT (pay, "checking from offset %u", offset); switch (gst_rtp_jpeg_pay_scan_marker (data, size, &offset)) { case JPEG_MARKER_JFIF: case JPEG_MARKER_CMT: case JPEG_MARKER_DHT: case JPEG_MARKER_H264: GST_LOG_OBJECT (pay, "skipping marker"); offset += gst_rtp_jpeg_pay_header_size (data, offset); break; case JPEG_MARKER_SOF: if (!gst_rtp_jpeg_pay_read_sof (pay, data, size, &offset, info)) goto invalid_format; sof_found = TRUE; break; case JPEG_MARKER_DQT: GST_LOG ("DQT found"); offset = gst_rtp_jpeg_pay_read_quant_table (data, size, offset, tables); dqt_found = TRUE; break; case JPEG_MARKER_SOS: sos_found = TRUE; GST_LOG_OBJECT (pay, "SOS found"); jpeg_header_size = offset + gst_rtp_jpeg_pay_header_size (data, offset); break; case JPEG_MARKER_EOI: GST_WARNING_OBJECT (pay, "EOI reached before SOS!"); break; case JPEG_MARKER_SOI: GST_LOG_OBJECT (pay, "SOI found"); break; case JPEG_MARKER_DRI: GST_LOG_OBJECT (pay, "DRI found"); if (gst_rtp_jpeg_pay_read_dri (pay, data, size, &offset, &restart_marker_header)) dri_found = TRUE; break; default: break; } } if (!dqt_found || !sof_found) goto unsupported_jpeg; /* by now we should either have negotiated the width/height or the SOF header * should have filled us in */ if (pay->width == 0 || pay->height == 0) goto no_dimension; GST_LOG_OBJECT (pay, "header size %u", jpeg_header_size); size -= jpeg_header_size; data += jpeg_header_size; offset = 0; if (dri_found) pay->type += 64; /* prepare stuff for the jpeg header */ jpeg_header.type_spec = 0; jpeg_header.type = pay->type; jpeg_header.q = pay->quant; jpeg_header.width = pay->width; jpeg_header.height = pay->height; /* collect the quant headers sizes */ quant_header.mbz = 0; quant_header.precision = 0; quant_header.length = 0; quant_data_size = 0; if (pay->quant > 127) { /* for the Y and U component, look up the quant table and its size. quant * tables for U and V should be the same */ for (i = 0; i < 2; i++) { guint qsize; guint qt; qt = info[i].qt; if (qt >= G_N_ELEMENTS (tables)) goto invalid_quant; qsize = tables[qt].size; if (qsize == 0) goto invalid_quant; quant_header.precision |= (qsize == 64 ? 0 : (1 << i)); quant_data_size += qsize; } quant_header.length = g_htons (quant_data_size); quant_data_size += sizeof (quant_header); } GST_LOG_OBJECT (pay, "quant_data size %u", quant_data_size); if (pay->buffer_list) { list = gst_buffer_list_new (); } bytes_left = sizeof (jpeg_header) + quant_data_size + size; if (dri_found) bytes_left += sizeof (restart_marker_header); frame_done = FALSE; do { GstBuffer *outbuf; guint8 *payload; guint payload_size = (bytes_left < mtu ? bytes_left : mtu); guint header_size; GstBuffer *paybuf; GstRTPBuffer rtp = { NULL }; header_size = sizeof (jpeg_header) + quant_data_size; if (dri_found) header_size += sizeof (restart_marker_header); outbuf = gst_rtp_buffer_new_allocate (header_size, 0, 0); gst_rtp_buffer_map (outbuf, GST_MAP_WRITE, &rtp); if (payload_size == bytes_left) { GST_LOG_OBJECT (pay, "last packet of frame"); frame_done = TRUE; gst_rtp_buffer_set_marker (&rtp, 1); } payload = gst_rtp_buffer_get_payload (&rtp); /* update offset */ #if (G_BYTE_ORDER == G_LITTLE_ENDIAN) jpeg_header.offset = ((offset & 0x0000FF) << 16) | ((offset & 0xFF0000) >> 16) | (offset & 0x00FF00); #else jpeg_header.offset = offset; #endif memcpy (payload, &jpeg_header, sizeof (jpeg_header)); payload += sizeof (jpeg_header); payload_size -= sizeof (jpeg_header); if (dri_found) { memcpy (payload, &restart_marker_header, sizeof (restart_marker_header)); payload += sizeof (restart_marker_header); payload_size -= sizeof (restart_marker_header); } /* only send quant table with first packet */ if (G_UNLIKELY (quant_data_size > 0)) { memcpy (payload, &quant_header, sizeof (quant_header)); payload += sizeof (quant_header); /* copy the quant tables for luma and chrominance */ for (i = 0; i < 2; i++) { guint qsize; guint qt; qt = info[i].qt; qsize = tables[qt].size; memcpy (payload, tables[qt].data, qsize); GST_LOG_OBJECT (pay, "component %d using quant %d, size %d", i, qt, qsize); payload += qsize; } payload_size -= quant_data_size; bytes_left -= quant_data_size; quant_data_size = 0; } GST_LOG_OBJECT (pay, "sending payload size %d", payload_size); gst_rtp_buffer_unmap (&rtp); /* create a new buf to hold the payload */ paybuf = gst_buffer_copy_region (buffer, GST_BUFFER_COPY_MEMORY, jpeg_header_size + offset, payload_size); /* join memory parts */ outbuf = gst_buffer_append (outbuf, paybuf); GST_BUFFER_TIMESTAMP (outbuf) = timestamp; if (pay->buffer_list) { /* and add to list */ gst_buffer_list_insert (list, -1, outbuf); } else { ret = gst_rtp_base_payload_push (basepayload, outbuf); if (ret != GST_FLOW_OK) break; } bytes_left -= payload_size; offset += payload_size; data += payload_size; } while (!frame_done); if (pay->buffer_list) { /* push the whole buffer list at once */ ret = gst_rtp_base_payload_push_list (basepayload, list); } gst_buffer_unmap (buffer, &map); gst_buffer_unref (buffer); return ret; /* ERRORS */ unsupported_jpeg: { GST_ELEMENT_ERROR (pay, STREAM, FORMAT, ("Unsupported JPEG"), (NULL)); gst_buffer_unmap (buffer, &map); gst_buffer_unref (buffer); return GST_FLOW_NOT_SUPPORTED; } no_dimension: { GST_ELEMENT_ERROR (pay, STREAM, FORMAT, ("No size given"), (NULL)); gst_buffer_unmap (buffer, &map); gst_buffer_unref (buffer); return GST_FLOW_NOT_NEGOTIATED; } invalid_format: { /* error was posted */ gst_buffer_unmap (buffer, &map); gst_buffer_unref (buffer); return GST_FLOW_ERROR; } invalid_quant: { GST_ELEMENT_ERROR (pay, STREAM, FORMAT, ("Invalid quant tables"), (NULL)); gst_buffer_unmap (buffer, &map); gst_buffer_unref (buffer); return GST_FLOW_ERROR; } } static void gst_rtp_jpeg_pay_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstRtpJPEGPay *rtpjpegpay; rtpjpegpay = GST_RTP_JPEG_PAY (object); switch (prop_id) { case PROP_JPEG_QUALITY: rtpjpegpay->quality = g_value_get_int (value); GST_DEBUG_OBJECT (object, "quality = %d", rtpjpegpay->quality); break; case PROP_JPEG_TYPE: rtpjpegpay->type = g_value_get_int (value); GST_DEBUG_OBJECT (object, "type = %d", rtpjpegpay->type); break; case PROP_BUFFER_LIST: rtpjpegpay->buffer_list = g_value_get_boolean (value); GST_DEBUG_OBJECT (object, "buffer_list = %d", rtpjpegpay->buffer_list); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_rtp_jpeg_pay_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstRtpJPEGPay *rtpjpegpay; rtpjpegpay = GST_RTP_JPEG_PAY (object); switch (prop_id) { case PROP_JPEG_QUALITY: g_value_set_int (value, rtpjpegpay->quality); break; case PROP_JPEG_TYPE: g_value_set_int (value, rtpjpegpay->type); break; case PROP_BUFFER_LIST: g_value_set_boolean (value, rtpjpegpay->buffer_list); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } gboolean gst_rtp_jpeg_pay_plugin_init (GstPlugin * plugin) { return gst_element_register (plugin, "rtpjpegpay", GST_RANK_SECONDARY, GST_TYPE_RTP_JPEG_PAY); }