2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * Copyright (C) <2009> Tim-Philipp Müller <tim centricular net>
4 * Copyright (C) 2012 Collabora Ltd.
5 * Author : Edward Hervey <edward@collabora.com>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
24 * SECTION:element-jpegdec
26 * Decodes jpeg images.
29 * <title>Example launch line</title>
31 * gst-launch-1.0 -v filesrc location=mjpeg.avi ! avidemux ! queue ! jpegdec ! videoconvert ! videoscale ! autovideosink
32 * ]| The above pipeline decode the mjpeg stream and renders it to the screen.
41 #include "gstjpegdec.h"
43 #include <gst/video/video.h>
44 #include <gst/video/gstvideometa.h>
45 #include <gst/video/gstvideopool.h>
46 #include "gst/gst-i18n-plugin.h"
50 #define MAX_WIDTH 65535
52 #define MAX_HEIGHT 65535
54 #define CINFO_GET_JPEGDEC(cinfo_ptr) \
55 (((struct GstJpegDecSourceMgr*)((cinfo_ptr)->src))->dec)
57 #define JPEG_DEFAULT_IDCT_METHOD JDCT_FASTEST
58 #define JPEG_DEFAULT_MAX_ERRORS 0
68 static GstStaticPadTemplate gst_jpeg_dec_src_pad_template =
69 GST_STATIC_PAD_TEMPLATE ("src",
72 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE
73 ("{ I420, RGB, BGR, RGBx, xRGB, BGRx, xBGR, GRAY8 }"))
77 /* FIXME: sof-marker is for IJG libjpeg 8, should be different for 6.2 */
78 /* FIXME: add back "sof-marker = (int) { 0, 1, 2, 5, 6, 7, 9, 10, 13, 14 }"
79 * once we have a parser and/or demuxer set caps properly */
80 static GstStaticPadTemplate gst_jpeg_dec_sink_pad_template =
81 GST_STATIC_PAD_TEMPLATE ("sink",
84 GST_STATIC_CAPS ("image/jpeg")
87 GST_DEBUG_CATEGORY_STATIC (jpeg_dec_debug);
88 #define GST_CAT_DEFAULT jpeg_dec_debug
89 GST_DEBUG_CATEGORY_STATIC (GST_CAT_PERFORMANCE);
91 static void gst_jpeg_dec_set_property (GObject * object, guint prop_id,
92 const GValue * value, GParamSpec * pspec);
93 static void gst_jpeg_dec_get_property (GObject * object, guint prop_id,
94 GValue * value, GParamSpec * pspec);
96 static gboolean gst_jpeg_dec_set_format (GstVideoDecoder * dec,
97 GstVideoCodecState * state);
98 static gboolean gst_jpeg_dec_start (GstVideoDecoder * bdec);
99 static gboolean gst_jpeg_dec_stop (GstVideoDecoder * bdec);
100 static gboolean gst_jpeg_dec_flush (GstVideoDecoder * bdec);
101 static GstFlowReturn gst_jpeg_dec_parse (GstVideoDecoder * bdec,
102 GstVideoCodecFrame * frame, GstAdapter * adapter, gboolean at_eos);
103 static GstFlowReturn gst_jpeg_dec_handle_frame (GstVideoDecoder * bdec,
104 GstVideoCodecFrame * frame);
105 static gboolean gst_jpeg_dec_decide_allocation (GstVideoDecoder * bdec,
108 #define gst_jpeg_dec_parent_class parent_class
109 G_DEFINE_TYPE (GstJpegDec, gst_jpeg_dec, GST_TYPE_VIDEO_DECODER);
112 gst_jpeg_dec_finalize (GObject * object)
114 GstJpegDec *dec = GST_JPEG_DEC (object);
116 jpeg_destroy_decompress (&dec->cinfo);
117 if (dec->input_state)
118 gst_video_codec_state_unref (dec->input_state);
120 G_OBJECT_CLASS (parent_class)->finalize (object);
124 gst_jpeg_dec_class_init (GstJpegDecClass * klass)
126 GObjectClass *gobject_class;
127 GstElementClass *element_class;
128 GstVideoDecoderClass *vdec_class;
130 gobject_class = (GObjectClass *) klass;
131 element_class = (GstElementClass *) klass;
132 vdec_class = (GstVideoDecoderClass *) klass;
134 parent_class = g_type_class_peek_parent (klass);
136 gobject_class->finalize = gst_jpeg_dec_finalize;
137 gobject_class->set_property = gst_jpeg_dec_set_property;
138 gobject_class->get_property = gst_jpeg_dec_get_property;
140 g_object_class_install_property (gobject_class, PROP_IDCT_METHOD,
141 g_param_spec_enum ("idct-method", "IDCT Method",
142 "The IDCT algorithm to use", GST_TYPE_IDCT_METHOD,
143 JPEG_DEFAULT_IDCT_METHOD,
144 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
147 * GstJpegDec:max-errors:
149 * Error out after receiving N consecutive decoding errors
150 * (-1 = never error out, 0 = automatic, 1 = fail on first error, etc.)
152 * Deprecated: 1.3.1: Property wasn't used internally
154 g_object_class_install_property (gobject_class, PROP_MAX_ERRORS,
155 g_param_spec_int ("max-errors", "Maximum Consecutive Decoding Errors",
156 "(Deprecated) Error out after receiving N consecutive decoding errors"
157 " (-1 = never fail, 0 = automatic, 1 = fail on first error)",
158 -1, G_MAXINT, JPEG_DEFAULT_MAX_ERRORS,
159 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
161 gst_element_class_add_pad_template (element_class,
162 gst_static_pad_template_get (&gst_jpeg_dec_src_pad_template));
163 gst_element_class_add_pad_template (element_class,
164 gst_static_pad_template_get (&gst_jpeg_dec_sink_pad_template));
165 gst_element_class_set_static_metadata (element_class, "JPEG image decoder",
166 "Codec/Decoder/Image",
167 "Decode images from JPEG format", "Wim Taymans <wim@fluendo.com>");
169 vdec_class->start = gst_jpeg_dec_start;
170 vdec_class->stop = gst_jpeg_dec_stop;
171 vdec_class->flush = gst_jpeg_dec_flush;
172 vdec_class->parse = gst_jpeg_dec_parse;
173 vdec_class->set_format = gst_jpeg_dec_set_format;
174 vdec_class->handle_frame = gst_jpeg_dec_handle_frame;
175 vdec_class->decide_allocation = gst_jpeg_dec_decide_allocation;
177 GST_DEBUG_CATEGORY_INIT (jpeg_dec_debug, "jpegdec", 0, "JPEG decoder");
178 GST_DEBUG_CATEGORY_GET (GST_CAT_PERFORMANCE, "GST_PERFORMANCE");
182 gst_jpeg_dec_fill_input_buffer (j_decompress_ptr cinfo)
186 dec = CINFO_GET_JPEGDEC (cinfo);
187 g_return_val_if_fail (dec != NULL, FALSE);
188 g_return_val_if_fail (dec->current_frame != NULL, FALSE);
189 g_return_val_if_fail (dec->current_frame_map.data != NULL, FALSE);
191 cinfo->src->next_input_byte = dec->current_frame_map.data;
192 cinfo->src->bytes_in_buffer = dec->current_frame_map.size;
198 gst_jpeg_dec_init_source (j_decompress_ptr cinfo)
200 GST_LOG_OBJECT (CINFO_GET_JPEGDEC (cinfo), "init_source");
205 gst_jpeg_dec_skip_input_data (j_decompress_ptr cinfo, glong num_bytes)
207 GstJpegDec *dec = CINFO_GET_JPEGDEC (cinfo);
209 GST_DEBUG_OBJECT (dec, "skip %ld bytes", num_bytes);
211 if (num_bytes > 0 && cinfo->src->bytes_in_buffer >= num_bytes) {
212 cinfo->src->next_input_byte += (size_t) num_bytes;
213 cinfo->src->bytes_in_buffer -= (size_t) num_bytes;
218 gst_jpeg_dec_resync_to_restart (j_decompress_ptr cinfo, gint desired)
220 GST_LOG_OBJECT (CINFO_GET_JPEGDEC (cinfo), "resync_to_start");
225 gst_jpeg_dec_term_source (j_decompress_ptr cinfo)
227 GST_LOG_OBJECT (CINFO_GET_JPEGDEC (cinfo), "term_source");
232 gst_jpeg_dec_my_output_message (j_common_ptr cinfo)
234 return; /* do nothing */
238 gst_jpeg_dec_my_emit_message (j_common_ptr cinfo, int msg_level)
240 /* GST_LOG_OBJECT (CINFO_GET_JPEGDEC (&cinfo), "msg_level=%d", msg_level); */
245 gst_jpeg_dec_my_error_exit (j_common_ptr cinfo)
247 struct GstJpegDecErrorMgr *err_mgr = (struct GstJpegDecErrorMgr *) cinfo->err;
249 (*cinfo->err->output_message) (cinfo);
250 longjmp (err_mgr->setjmp_buffer, 1);
254 gst_jpeg_dec_init (GstJpegDec * dec)
256 GST_DEBUG ("initializing");
259 memset (&dec->cinfo, 0, sizeof (dec->cinfo));
260 memset (&dec->jerr, 0, sizeof (dec->jerr));
261 dec->cinfo.err = jpeg_std_error (&dec->jerr.pub);
262 dec->jerr.pub.output_message = gst_jpeg_dec_my_output_message;
263 dec->jerr.pub.emit_message = gst_jpeg_dec_my_emit_message;
264 dec->jerr.pub.error_exit = gst_jpeg_dec_my_error_exit;
266 jpeg_create_decompress (&dec->cinfo);
268 dec->cinfo.src = (struct jpeg_source_mgr *) &dec->jsrc;
269 dec->cinfo.src->init_source = gst_jpeg_dec_init_source;
270 dec->cinfo.src->fill_input_buffer = gst_jpeg_dec_fill_input_buffer;
271 dec->cinfo.src->skip_input_data = gst_jpeg_dec_skip_input_data;
272 dec->cinfo.src->resync_to_restart = gst_jpeg_dec_resync_to_restart;
273 dec->cinfo.src->term_source = gst_jpeg_dec_term_source;
276 /* init properties */
277 dec->idct_method = JPEG_DEFAULT_IDCT_METHOD;
278 dec->max_errors = JPEG_DEFAULT_MAX_ERRORS;
281 static inline gboolean
282 gst_jpeg_dec_parse_tag_has_entropy_segment (guint8 tag)
284 if (tag == 0xda || (tag >= 0xd0 && tag <= 0xd7))
290 gst_jpeg_dec_parse (GstVideoDecoder * bdec, GstVideoCodecFrame * frame,
291 GstAdapter * adapter, gboolean at_eos)
296 gint offset = 0, noffset;
297 GstJpegDec *dec = (GstJpegDec *) bdec;
299 GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT (frame);
301 /* FIXME : The overhead of using scan_uint32 is massive */
303 size = gst_adapter_available (adapter);
304 GST_DEBUG ("Parsing jpeg image data (%u bytes)", size);
307 GST_DEBUG ("Flushing all data out");
310 /* If we have leftover data, throw it away */
311 if (!dec->saw_header)
313 goto have_full_frame;
319 if (!dec->saw_header) {
321 /* we expect at least 4 bytes, first of which start marker */
323 gst_adapter_masked_scan_uint32 (adapter, 0xffff0000, 0xffd80000, 0,
326 GST_DEBUG ("ret:%d", ret);
331 gst_adapter_flush (adapter, ret);
334 dec->saw_header = TRUE;
341 GST_DEBUG ("offset:%d, size:%d", offset, size);
344 gst_adapter_masked_scan_uint32_peek (adapter, 0x0000ff00, 0x0000ff00,
345 offset, size - offset, &value);
347 /* lost sync if 0xff marker not where expected */
348 if ((resync = (noffset != offset))) {
349 GST_DEBUG ("Lost sync at 0x%08x, resyncing", offset + 2);
351 /* may have marker, but could have been resyncng */
352 resync = resync || dec->parse_resync;
353 /* Skip over extra 0xff */
354 while ((noffset >= 0) && ((value & 0xff) == 0xff)) {
357 gst_adapter_masked_scan_uint32_peek (adapter, 0x0000ff00, 0x0000ff00,
358 noffset, size - noffset, &value);
360 /* enough bytes left for marker? (we need 0xNN after the 0xff) */
362 GST_DEBUG ("at end of input and no EOI marker found, need more data");
366 /* now lock on the marker we found */
368 value = value & 0xff;
370 GST_DEBUG ("0x%08x: EOI marker", offset + 2);
371 /* clear parse state */
372 dec->saw_header = FALSE;
373 dec->parse_resync = FALSE;
375 goto have_full_frame;
378 /* Skip this frame if we found another SOI marker */
379 GST_DEBUG ("0x%08x: SOI marker before EOI, skipping", offset + 2);
380 dec->parse_resync = FALSE;
386 if (value >= 0xd0 && value <= 0xd7)
389 /* peek tag and subsequent length */
390 if (offset + 2 + 4 > size)
393 gst_adapter_masked_scan_uint32_peek (adapter, 0x0, 0x0, offset + 2, 4,
395 frame_len = frame_len & 0xffff;
397 GST_DEBUG ("0x%08x: tag %02x, frame_len=%u", offset + 2, value, frame_len);
398 /* the frame length includes the 2 bytes for the length; here we want at
399 * least 2 more bytes at the end for an end marker */
400 if (offset + 2 + 2 + frame_len + 2 > size) {
404 if (gst_jpeg_dec_parse_tag_has_entropy_segment (value)) {
405 guint eseglen = dec->parse_entropy_len;
407 GST_DEBUG ("0x%08x: finding entropy segment length (eseglen:%d)",
408 offset + 2, eseglen);
409 if (size < offset + 2 + frame_len + eseglen)
411 noffset = offset + 2 + frame_len + dec->parse_entropy_len;
413 GST_DEBUG ("noffset:%d, size:%d, size - noffset:%d",
414 noffset, size, size - noffset);
415 noffset = gst_adapter_masked_scan_uint32_peek (adapter, 0x0000ff00,
416 0x0000ff00, noffset, size - noffset, &value);
419 dec->parse_entropy_len = size - offset - 4 - frame_len - 2;
422 if ((value & 0xff) != 0x00) {
423 eseglen = noffset - offset - frame_len - 2;
428 dec->parse_entropy_len = 0;
429 frame_len += eseglen;
430 GST_DEBUG ("entropy segment length=%u => frame_len=%u", eseglen,
434 /* check if we will still be in sync if we interpret
435 * this as a sync point and skip this frame */
436 noffset = offset + frame_len + 2;
437 noffset = gst_adapter_masked_scan_uint32 (adapter, 0x0000ff00, 0x0000ff00,
440 /* ignore and continue resyncing until we hit the end
441 * of our data or find a sync point that looks okay */
445 GST_DEBUG ("found sync at 0x%x", offset + 2);
448 /* Add current data to output buffer */
449 toadd += frame_len + 2;
450 offset += frame_len + 2;
455 gst_video_decoder_add_to_frame (bdec, toadd);
456 return GST_VIDEO_DECODER_FLOW_NEED_DATA;
460 gst_video_decoder_add_to_frame (bdec, toadd);
461 GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT (frame);
462 return gst_video_decoder_have_frame (bdec);
465 gst_adapter_flush (adapter, size);
470 /* shamelessly ripped from jpegutils.c in mjpegtools */
472 add_huff_table (j_decompress_ptr dinfo,
473 JHUFF_TBL ** htblptr, const UINT8 * bits, const UINT8 * val)
474 /* Define a Huffman table */
478 if (*htblptr == NULL)
479 *htblptr = jpeg_alloc_huff_table ((j_common_ptr) dinfo);
483 /* Copy the number-of-symbols-of-each-code-length counts */
484 memcpy ((*htblptr)->bits, bits, sizeof ((*htblptr)->bits));
486 /* Validate the counts. We do this here mainly so we can copy the right
487 * number of symbols from the val[] array, without risking marching off
488 * the end of memory. jchuff.c will do a more thorough test later.
491 for (len = 1; len <= 16; len++)
492 nsymbols += bits[len];
493 if (nsymbols < 1 || nsymbols > 256)
494 g_error ("jpegutils.c: add_huff_table failed badly. ");
496 memcpy ((*htblptr)->huffval, val, nsymbols * sizeof (UINT8));
502 std_huff_tables (j_decompress_ptr dinfo)
503 /* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
504 /* IMPORTANT: these are only valid for 8-bit data precision! */
506 static const UINT8 bits_dc_luminance[17] =
507 { /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
508 static const UINT8 val_dc_luminance[] =
509 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
511 static const UINT8 bits_dc_chrominance[17] =
512 { /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
513 static const UINT8 val_dc_chrominance[] =
514 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
516 static const UINT8 bits_ac_luminance[17] =
517 { /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
518 static const UINT8 val_ac_luminance[] =
519 { 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
520 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
521 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
522 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
523 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
524 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
525 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
526 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
527 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
528 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
529 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
530 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
531 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
532 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
533 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
534 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
535 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
536 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
537 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
538 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
542 static const UINT8 bits_ac_chrominance[17] =
543 { /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
544 static const UINT8 val_ac_chrominance[] =
545 { 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
546 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
547 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
548 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
549 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
550 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
551 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
552 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
553 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
554 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
555 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
556 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
557 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
558 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
559 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
560 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
561 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
562 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
563 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
564 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
568 add_huff_table (dinfo, &dinfo->dc_huff_tbl_ptrs[0],
569 bits_dc_luminance, val_dc_luminance);
570 add_huff_table (dinfo, &dinfo->ac_huff_tbl_ptrs[0],
571 bits_ac_luminance, val_ac_luminance);
572 add_huff_table (dinfo, &dinfo->dc_huff_tbl_ptrs[1],
573 bits_dc_chrominance, val_dc_chrominance);
574 add_huff_table (dinfo, &dinfo->ac_huff_tbl_ptrs[1],
575 bits_ac_chrominance, val_ac_chrominance);
581 guarantee_huff_tables (j_decompress_ptr dinfo)
583 if ((dinfo->dc_huff_tbl_ptrs[0] == NULL) &&
584 (dinfo->dc_huff_tbl_ptrs[1] == NULL) &&
585 (dinfo->ac_huff_tbl_ptrs[0] == NULL) &&
586 (dinfo->ac_huff_tbl_ptrs[1] == NULL)) {
587 GST_DEBUG ("Generating standard Huffman tables for this frame.");
588 std_huff_tables (dinfo);
593 gst_jpeg_dec_set_format (GstVideoDecoder * dec, GstVideoCodecState * state)
595 GstJpegDec *jpeg = GST_JPEG_DEC (dec);
597 if (dec->input_segment.format == GST_FORMAT_TIME)
598 gst_video_decoder_set_packetized (dec, TRUE);
600 gst_video_decoder_set_packetized (dec, FALSE);
602 if (jpeg->input_state)
603 gst_video_codec_state_unref (jpeg->input_state);
604 jpeg->input_state = gst_video_codec_state_ref (state);
612 hresamplecpy1 (guint8 * dest, const guint8 * src, guint len)
616 for (i = 0; i < len; ++i) {
617 /* equivalent to: dest[i] = src[i << 1] */
626 gst_jpeg_dec_free_buffers (GstJpegDec * dec)
630 for (i = 0; i < 16; i++) {
631 g_free (dec->idr_y[i]);
632 g_free (dec->idr_u[i]);
633 g_free (dec->idr_v[i]);
634 dec->idr_y[i] = NULL;
635 dec->idr_u[i] = NULL;
636 dec->idr_v[i] = NULL;
639 dec->idr_width_allocated = 0;
642 static inline gboolean
643 gst_jpeg_dec_ensure_buffers (GstJpegDec * dec, guint maxrowbytes)
647 if (G_LIKELY (dec->idr_width_allocated == maxrowbytes))
650 /* FIXME: maybe just alloc one or three blocks altogether? */
651 for (i = 0; i < 16; i++) {
652 dec->idr_y[i] = g_try_realloc (dec->idr_y[i], maxrowbytes);
653 dec->idr_u[i] = g_try_realloc (dec->idr_u[i], maxrowbytes);
654 dec->idr_v[i] = g_try_realloc (dec->idr_v[i], maxrowbytes);
656 if (G_UNLIKELY (!dec->idr_y[i] || !dec->idr_u[i] || !dec->idr_v[i])) {
657 GST_WARNING_OBJECT (dec, "out of memory, i=%d, bytes=%u", i, maxrowbytes);
662 dec->idr_width_allocated = maxrowbytes;
663 GST_LOG_OBJECT (dec, "allocated temp memory, %u bytes/row", maxrowbytes);
668 gst_jpeg_dec_decode_grayscale (GstJpegDec * dec, GstVideoFrame * frame)
671 guchar **scanarray[1] = { rows };
676 gint pstride, rstride;
678 GST_DEBUG_OBJECT (dec, "indirect decoding of grayscale");
680 width = GST_VIDEO_FRAME_WIDTH (frame);
681 height = GST_VIDEO_FRAME_HEIGHT (frame);
683 if (G_UNLIKELY (!gst_jpeg_dec_ensure_buffers (dec, GST_ROUND_UP_32 (width))))
686 base[0] = GST_VIDEO_FRAME_COMP_DATA (frame, 0);
687 pstride = GST_VIDEO_FRAME_COMP_PSTRIDE (frame, 0);
688 rstride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 0);
690 memcpy (rows, dec->idr_y, 16 * sizeof (gpointer));
694 lines = jpeg_read_raw_data (&dec->cinfo, scanarray, DCTSIZE);
695 if (G_LIKELY (lines > 0)) {
696 for (j = 0; (j < DCTSIZE) && (i < height); j++, i++) {
700 for (k = 0; k < width; k++) {
701 base[0][p] = rows[j][k];
707 GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
713 gst_jpeg_dec_decode_rgb (GstJpegDec * dec, GstVideoFrame * frame)
715 guchar *r_rows[16], *g_rows[16], *b_rows[16];
716 guchar **scanarray[3] = { r_rows, g_rows, b_rows };
720 guint pstride, rstride;
723 GST_DEBUG_OBJECT (dec, "indirect decoding of RGB");
725 width = GST_VIDEO_FRAME_WIDTH (frame);
726 height = GST_VIDEO_FRAME_HEIGHT (frame);
728 if (G_UNLIKELY (!gst_jpeg_dec_ensure_buffers (dec, GST_ROUND_UP_32 (width))))
731 for (i = 0; i < 3; i++)
732 base[i] = GST_VIDEO_FRAME_COMP_DATA (frame, i);
734 pstride = GST_VIDEO_FRAME_COMP_PSTRIDE (frame, 0);
735 rstride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 0);
737 memcpy (r_rows, dec->idr_y, 16 * sizeof (gpointer));
738 memcpy (g_rows, dec->idr_u, 16 * sizeof (gpointer));
739 memcpy (b_rows, dec->idr_v, 16 * sizeof (gpointer));
743 lines = jpeg_read_raw_data (&dec->cinfo, scanarray, DCTSIZE);
744 if (G_LIKELY (lines > 0)) {
745 for (j = 0; (j < DCTSIZE) && (i < height); j++, i++) {
749 for (k = 0; k < width; k++) {
750 base[0][p] = r_rows[j][k];
751 base[1][p] = g_rows[j][k];
752 base[2][p] = b_rows[j][k];
760 GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
766 gst_jpeg_dec_decode_indirect (GstJpegDec * dec, GstVideoFrame * frame, gint r_v,
769 guchar *y_rows[16], *u_rows[16], *v_rows[16];
770 guchar **scanarray[3] = { y_rows, u_rows, v_rows };
773 guchar *base[3], *last[3];
777 GST_DEBUG_OBJECT (dec,
778 "unadvantageous width or r_h, taking slow route involving memcpy");
780 width = GST_VIDEO_FRAME_WIDTH (frame);
781 height = GST_VIDEO_FRAME_HEIGHT (frame);
783 if (G_UNLIKELY (!gst_jpeg_dec_ensure_buffers (dec, GST_ROUND_UP_32 (width))))
786 for (i = 0; i < 3; i++) {
787 base[i] = GST_VIDEO_FRAME_COMP_DATA (frame, i);
788 stride[i] = GST_VIDEO_FRAME_COMP_STRIDE (frame, i);
789 /* make sure we don't make jpeglib write beyond our buffer,
790 * which might happen if (height % (r_v*DCTSIZE)) != 0 */
791 last[i] = base[i] + (GST_VIDEO_FRAME_COMP_STRIDE (frame, i) *
792 (GST_VIDEO_FRAME_COMP_HEIGHT (frame, i) - 1));
795 memcpy (y_rows, dec->idr_y, 16 * sizeof (gpointer));
796 memcpy (u_rows, dec->idr_u, 16 * sizeof (gpointer));
797 memcpy (v_rows, dec->idr_v, 16 * sizeof (gpointer));
799 /* fill chroma components for grayscale */
801 GST_DEBUG_OBJECT (dec, "grayscale, filling chroma");
802 for (i = 0; i < 16; i++) {
803 memset (u_rows[i], GST_ROUND_UP_32 (width), 0x80);
804 memset (v_rows[i], GST_ROUND_UP_32 (width), 0x80);
808 for (i = 0; i < height; i += r_v * DCTSIZE) {
809 lines = jpeg_read_raw_data (&dec->cinfo, scanarray, r_v * DCTSIZE);
810 if (G_LIKELY (lines > 0)) {
811 for (j = 0, k = 0; j < (r_v * DCTSIZE); j += r_v, k++) {
812 if (G_LIKELY (base[0] <= last[0])) {
813 memcpy (base[0], y_rows[j], stride[0]);
814 base[0] += stride[0];
817 if (G_LIKELY (base[0] <= last[0])) {
818 memcpy (base[0], y_rows[j + 1], stride[0]);
819 base[0] += stride[0];
822 if (G_LIKELY (base[1] <= last[1] && base[2] <= last[2])) {
824 memcpy (base[1], u_rows[k], stride[1]);
825 memcpy (base[2], v_rows[k], stride[2]);
826 } else if (r_h == 1) {
827 hresamplecpy1 (base[1], u_rows[k], stride[1]);
828 hresamplecpy1 (base[2], v_rows[k], stride[2]);
830 /* FIXME: implement (at least we avoid crashing by doing nothing) */
834 if (r_v == 2 || (k & 1) != 0) {
835 base[1] += stride[1];
836 base[2] += stride[2];
840 GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
846 gst_jpeg_dec_decode_direct (GstJpegDec * dec, GstVideoFrame * frame)
848 guchar **line[3]; /* the jpeg line buffer */
849 guchar *y[4 * DCTSIZE] = { NULL, }; /* alloc enough for the lines */
850 guchar *u[4 * DCTSIZE] = { NULL, }; /* r_v will be <4 */
851 guchar *v[4 * DCTSIZE] = { NULL, };
853 gint lines, v_samp[3];
854 guchar *base[3], *last[3];
862 v_samp[0] = dec->cinfo.comp_info[0].v_samp_factor;
863 v_samp[1] = dec->cinfo.comp_info[1].v_samp_factor;
864 v_samp[2] = dec->cinfo.comp_info[2].v_samp_factor;
866 if (G_UNLIKELY (v_samp[0] > 2 || v_samp[1] > 2 || v_samp[2] > 2))
867 goto format_not_supported;
869 height = GST_VIDEO_FRAME_HEIGHT (frame);
871 for (i = 0; i < 3; i++) {
872 base[i] = GST_VIDEO_FRAME_COMP_DATA (frame, i);
873 stride[i] = GST_VIDEO_FRAME_COMP_STRIDE (frame, i);
874 /* make sure we don't make jpeglib write beyond our buffer,
875 * which might happen if (height % (r_v*DCTSIZE)) != 0 */
876 last[i] = base[i] + (GST_VIDEO_FRAME_COMP_STRIDE (frame, i) *
877 (GST_VIDEO_FRAME_COMP_HEIGHT (frame, i) - 1));
880 /* let jpeglib decode directly into our final buffer */
881 GST_DEBUG_OBJECT (dec, "decoding directly into output buffer");
883 for (i = 0; i < height; i += v_samp[0] * DCTSIZE) {
884 for (j = 0; j < (v_samp[0] * DCTSIZE); ++j) {
886 line[0][j] = base[0] + (i + j) * stride[0];
887 if (G_UNLIKELY (line[0][j] > last[0]))
888 line[0][j] = last[0];
890 if (v_samp[1] == v_samp[0]) {
891 line[1][j] = base[1] + ((i + j) / 2) * stride[1];
892 } else if (j < (v_samp[1] * DCTSIZE)) {
893 line[1][j] = base[1] + ((i / 2) + j) * stride[1];
895 if (G_UNLIKELY (line[1][j] > last[1]))
896 line[1][j] = last[1];
898 if (v_samp[2] == v_samp[0]) {
899 line[2][j] = base[2] + ((i + j) / 2) * stride[2];
900 } else if (j < (v_samp[2] * DCTSIZE)) {
901 line[2][j] = base[2] + ((i / 2) + j) * stride[2];
903 if (G_UNLIKELY (line[2][j] > last[2]))
904 line[2][j] = last[2];
907 lines = jpeg_read_raw_data (&dec->cinfo, line, v_samp[0] * DCTSIZE);
908 if (G_UNLIKELY (!lines)) {
909 GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
914 format_not_supported:
916 gboolean ret = GST_FLOW_OK;
918 GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
919 (_("Failed to decode JPEG image")),
920 ("Unsupported subsampling schema: v_samp factors: %u %u %u", v_samp[0],
921 v_samp[1], v_samp[2]), ret);
928 gst_jpeg_dec_negotiate (GstJpegDec * dec, gint width, gint height, gint clrspc)
930 GstVideoCodecState *outstate;
932 GstVideoFormat format;
936 format = GST_VIDEO_FORMAT_RGB;
939 format = GST_VIDEO_FORMAT_GRAY8;
942 format = GST_VIDEO_FORMAT_I420;
946 /* Compare to currently configured output state */
947 outstate = gst_video_decoder_get_output_state (GST_VIDEO_DECODER (dec));
949 info = &outstate->info;
951 if (width == GST_VIDEO_INFO_WIDTH (info) &&
952 height == GST_VIDEO_INFO_HEIGHT (info) &&
953 format == GST_VIDEO_INFO_FORMAT (info)) {
954 gst_video_codec_state_unref (outstate);
957 gst_video_codec_state_unref (outstate);
961 gst_video_decoder_set_output_state (GST_VIDEO_DECODER (dec), format,
962 width, height, dec->input_state);
969 outstate->info.colorimetry.range = GST_VIDEO_COLOR_RANGE_0_255;
970 outstate->info.colorimetry.matrix = GST_VIDEO_COLOR_MATRIX_BT601;
971 outstate->info.colorimetry.transfer = GST_VIDEO_TRANSFER_UNKNOWN;
972 outstate->info.colorimetry.primaries = GST_VIDEO_COLOR_PRIMARIES_UNKNOWN;
976 gst_video_codec_state_unref (outstate);
978 gst_video_decoder_negotiate (GST_VIDEO_DECODER (dec));
980 GST_DEBUG_OBJECT (dec, "max_v_samp_factor=%d", dec->cinfo.max_v_samp_factor);
981 GST_DEBUG_OBJECT (dec, "max_h_samp_factor=%d", dec->cinfo.max_h_samp_factor);
985 gst_jpeg_dec_handle_frame (GstVideoDecoder * bdec, GstVideoCodecFrame * frame)
987 GstFlowReturn ret = GST_FLOW_OK;
988 GstJpegDec *dec = (GstJpegDec *) bdec;
989 GstVideoFrame vframe;
993 gboolean need_unmap = TRUE;
994 GstVideoCodecState *state = NULL;
996 dec->current_frame = frame;
997 gst_buffer_map (frame->input_buffer, &dec->current_frame_map, GST_MAP_READ);
998 gst_jpeg_dec_fill_input_buffer (&dec->cinfo);
1000 if (setjmp (dec->jerr.setjmp_buffer)) {
1001 code = dec->jerr.pub.msg_code;
1003 if (code == JERR_INPUT_EOF) {
1004 GST_DEBUG ("jpeg input EOF error, we probably need more data");
1005 goto need_more_data;
1011 hdr_ok = jpeg_read_header (&dec->cinfo, TRUE);
1012 if (G_UNLIKELY (hdr_ok != JPEG_HEADER_OK)) {
1013 GST_WARNING_OBJECT (dec, "reading the header failed, %d", hdr_ok);
1016 GST_LOG_OBJECT (dec, "num_components=%d", dec->cinfo.num_components);
1017 GST_LOG_OBJECT (dec, "jpeg_color_space=%d", dec->cinfo.jpeg_color_space);
1019 if (!dec->cinfo.num_components || !dec->cinfo.comp_info)
1020 goto components_not_supported;
1022 r_h = dec->cinfo.comp_info[0].h_samp_factor;
1023 r_v = dec->cinfo.comp_info[0].v_samp_factor;
1025 GST_LOG_OBJECT (dec, "r_h = %d, r_v = %d", r_h, r_v);
1027 if (dec->cinfo.num_components > 3)
1028 goto components_not_supported;
1030 /* verify color space expectation to avoid going *boom* or bogus output */
1031 if (dec->cinfo.jpeg_color_space != JCS_YCbCr &&
1032 dec->cinfo.jpeg_color_space != JCS_GRAYSCALE &&
1033 dec->cinfo.jpeg_color_space != JCS_RGB)
1034 goto unsupported_colorspace;
1036 #ifndef GST_DISABLE_GST_DEBUG
1040 for (i = 0; i < dec->cinfo.num_components; ++i) {
1041 GST_LOG_OBJECT (dec, "[%d] h_samp_factor=%d, v_samp_factor=%d, cid=%d",
1042 i, dec->cinfo.comp_info[i].h_samp_factor,
1043 dec->cinfo.comp_info[i].v_samp_factor,
1044 dec->cinfo.comp_info[i].component_id);
1049 /* prepare for raw output */
1050 dec->cinfo.do_fancy_upsampling = FALSE;
1051 dec->cinfo.do_block_smoothing = FALSE;
1052 dec->cinfo.out_color_space = dec->cinfo.jpeg_color_space;
1053 dec->cinfo.dct_method = dec->idct_method;
1054 dec->cinfo.raw_data_out = TRUE;
1056 GST_LOG_OBJECT (dec, "starting decompress");
1057 guarantee_huff_tables (&dec->cinfo);
1058 if (!jpeg_start_decompress (&dec->cinfo)) {
1059 GST_WARNING_OBJECT (dec, "failed to start decompression cycle");
1062 /* sanity checks to get safe and reasonable output */
1063 switch (dec->cinfo.jpeg_color_space) {
1065 if (dec->cinfo.num_components != 1)
1066 goto invalid_yuvrgbgrayscale;
1069 if (dec->cinfo.num_components != 3 || dec->cinfo.max_v_samp_factor > 1 ||
1070 dec->cinfo.max_h_samp_factor > 1)
1071 goto invalid_yuvrgbgrayscale;
1074 if (dec->cinfo.num_components != 3 ||
1075 r_v > 2 || r_v < dec->cinfo.comp_info[0].v_samp_factor ||
1076 r_v < dec->cinfo.comp_info[1].v_samp_factor ||
1077 r_h < dec->cinfo.comp_info[0].h_samp_factor ||
1078 r_h < dec->cinfo.comp_info[1].h_samp_factor)
1079 goto invalid_yuvrgbgrayscale;
1082 g_assert_not_reached ();
1086 width = dec->cinfo.output_width;
1087 height = dec->cinfo.output_height;
1089 if (G_UNLIKELY (width < MIN_WIDTH || width > MAX_WIDTH ||
1090 height < MIN_HEIGHT || height > MAX_HEIGHT))
1093 gst_jpeg_dec_negotiate (dec, width, height, dec->cinfo.jpeg_color_space);
1095 state = gst_video_decoder_get_output_state (bdec);
1096 ret = gst_video_decoder_allocate_output_frame (bdec, frame);
1097 if (G_UNLIKELY (ret != GST_FLOW_OK))
1100 if (!gst_video_frame_map (&vframe, &state->info, frame->output_buffer,
1104 GST_LOG_OBJECT (dec, "width %d, height %d", width, height);
1106 if (dec->cinfo.jpeg_color_space == JCS_RGB) {
1107 gst_jpeg_dec_decode_rgb (dec, &vframe);
1108 } else if (dec->cinfo.jpeg_color_space == JCS_GRAYSCALE) {
1109 gst_jpeg_dec_decode_grayscale (dec, &vframe);
1111 GST_LOG_OBJECT (dec, "decompressing (reqired scanline buffer height = %u)",
1112 dec->cinfo.rec_outbuf_height);
1114 /* For some widths jpeglib requires more horizontal padding than I420
1115 * provides. In those cases we need to decode into separate buffers and then
1116 * copy over the data into our final picture buffer, otherwise jpeglib might
1117 * write over the end of a line into the beginning of the next line,
1118 * resulting in blocky artifacts on the left side of the picture. */
1119 if (G_UNLIKELY (width % (dec->cinfo.max_h_samp_factor * DCTSIZE) != 0
1120 || dec->cinfo.comp_info[0].h_samp_factor != 2
1121 || dec->cinfo.comp_info[1].h_samp_factor != 1
1122 || dec->cinfo.comp_info[2].h_samp_factor != 1)) {
1123 GST_CAT_LOG_OBJECT (GST_CAT_PERFORMANCE, dec,
1124 "indirect decoding using extra buffer copy");
1125 gst_jpeg_dec_decode_indirect (dec, &vframe, r_v, r_h,
1126 dec->cinfo.num_components);
1128 ret = gst_jpeg_dec_decode_direct (dec, &vframe);
1130 if (G_UNLIKELY (ret != GST_FLOW_OK))
1131 goto decode_direct_failed;
1135 gst_video_frame_unmap (&vframe);
1137 GST_LOG_OBJECT (dec, "decompressing finished");
1138 jpeg_finish_decompress (&dec->cinfo);
1140 gst_buffer_unmap (frame->input_buffer, &dec->current_frame_map);
1141 ret = gst_video_decoder_finish_frame (bdec, frame);
1149 gst_buffer_unmap (frame->input_buffer, &dec->current_frame_map);
1152 gst_video_codec_state_unref (state);
1159 GST_LOG_OBJECT (dec, "we need more data");
1166 GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
1167 (_("Failed to decode JPEG image")),
1168 ("Picture is too small or too big (%ux%u)", width, height), ret);
1169 ret = GST_FLOW_ERROR;
1174 gchar err_msg[JMSG_LENGTH_MAX];
1176 dec->jerr.pub.format_message ((j_common_ptr) (&dec->cinfo), err_msg);
1178 GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
1179 (_("Failed to decode JPEG image")), ("Decode error #%u: %s", code,
1182 gst_buffer_unmap (frame->input_buffer, &dec->current_frame_map);
1183 gst_video_decoder_drop_frame (bdec, frame);
1185 jpeg_abort_decompress (&dec->cinfo);
1189 decode_direct_failed:
1191 /* already posted an error message */
1192 jpeg_abort_decompress (&dec->cinfo);
1197 const gchar *reason;
1199 reason = gst_flow_get_name (ret);
1201 GST_DEBUG_OBJECT (dec, "failed to alloc buffer, reason %s", reason);
1202 /* Reset for next time */
1203 jpeg_abort_decompress (&dec->cinfo);
1204 if (ret != GST_FLOW_EOS && ret != GST_FLOW_FLUSHING &&
1205 ret != GST_FLOW_NOT_LINKED) {
1206 GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
1207 (_("Failed to decode JPEG image")),
1208 ("Buffer allocation failed, reason: %s", reason), ret);
1209 jpeg_abort_decompress (&dec->cinfo);
1213 components_not_supported:
1215 GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
1216 (_("Failed to decode JPEG image")),
1217 ("number of components not supported: %d (max 3)",
1218 dec->cinfo.num_components), ret);
1219 jpeg_abort_decompress (&dec->cinfo);
1222 unsupported_colorspace:
1224 GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
1225 (_("Failed to decode JPEG image")),
1226 ("Picture has unknown or unsupported colourspace"), ret);
1227 jpeg_abort_decompress (&dec->cinfo);
1230 invalid_yuvrgbgrayscale:
1232 GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
1233 (_("Failed to decode JPEG image")),
1234 ("Picture is corrupt or unhandled YUV/RGB/grayscale layout"), ret);
1235 jpeg_abort_decompress (&dec->cinfo);
1241 gst_jpeg_dec_decide_allocation (GstVideoDecoder * bdec, GstQuery * query)
1243 GstBufferPool *pool = NULL;
1244 GstStructure *config;
1246 if (!GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation (bdec, query))
1249 if (gst_query_get_n_allocation_pools (query) > 0)
1250 gst_query_parse_nth_allocation_pool (query, 0, &pool, NULL, NULL, NULL);
1255 config = gst_buffer_pool_get_config (pool);
1256 if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL)) {
1257 gst_buffer_pool_config_add_option (config,
1258 GST_BUFFER_POOL_OPTION_VIDEO_META);
1260 gst_buffer_pool_set_config (pool, config);
1261 gst_object_unref (pool);
1267 gst_jpeg_dec_start (GstVideoDecoder * bdec)
1269 GstJpegDec *dec = (GstJpegDec *) bdec;
1271 dec->saw_header = FALSE;
1272 dec->parse_entropy_len = 0;
1273 dec->parse_resync = FALSE;
1275 gst_video_decoder_set_packetized (bdec, FALSE);
1281 gst_jpeg_dec_flush (GstVideoDecoder * bdec)
1283 GstJpegDec *dec = (GstJpegDec *) bdec;
1285 jpeg_abort_decompress (&dec->cinfo);
1286 dec->parse_entropy_len = 0;
1287 dec->parse_resync = FALSE;
1288 dec->saw_header = FALSE;
1294 gst_jpeg_dec_set_property (GObject * object, guint prop_id,
1295 const GValue * value, GParamSpec * pspec)
1299 dec = GST_JPEG_DEC (object);
1302 case PROP_IDCT_METHOD:
1303 dec->idct_method = g_value_get_enum (value);
1305 case PROP_MAX_ERRORS:
1306 g_atomic_int_set (&dec->max_errors, g_value_get_int (value));
1310 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1316 gst_jpeg_dec_get_property (GObject * object, guint prop_id, GValue * value,
1321 dec = GST_JPEG_DEC (object);
1324 case PROP_IDCT_METHOD:
1325 g_value_set_enum (value, dec->idct_method);
1327 case PROP_MAX_ERRORS:
1328 g_value_set_int (value, g_atomic_int_get (&dec->max_errors));
1332 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1338 gst_jpeg_dec_stop (GstVideoDecoder * bdec)
1340 GstJpegDec *dec = (GstJpegDec *) bdec;
1342 gst_jpeg_dec_free_buffers (dec);