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,
107 static gboolean gst_jpeg_dec_sink_event (GstVideoDecoder * bdec,
110 #define gst_jpeg_dec_parent_class parent_class
111 G_DEFINE_TYPE (GstJpegDec, gst_jpeg_dec, GST_TYPE_VIDEO_DECODER);
114 gst_jpeg_dec_finalize (GObject * object)
116 GstJpegDec *dec = GST_JPEG_DEC (object);
118 jpeg_destroy_decompress (&dec->cinfo);
119 if (dec->input_state)
120 gst_video_codec_state_unref (dec->input_state);
122 G_OBJECT_CLASS (parent_class)->finalize (object);
126 gst_jpeg_dec_class_init (GstJpegDecClass * klass)
128 GObjectClass *gobject_class;
129 GstElementClass *element_class;
130 GstVideoDecoderClass *vdec_class;
132 gobject_class = (GObjectClass *) klass;
133 element_class = (GstElementClass *) klass;
134 vdec_class = (GstVideoDecoderClass *) klass;
136 parent_class = g_type_class_peek_parent (klass);
138 gobject_class->finalize = gst_jpeg_dec_finalize;
139 gobject_class->set_property = gst_jpeg_dec_set_property;
140 gobject_class->get_property = gst_jpeg_dec_get_property;
142 g_object_class_install_property (gobject_class, PROP_IDCT_METHOD,
143 g_param_spec_enum ("idct-method", "IDCT Method",
144 "The IDCT algorithm to use", GST_TYPE_IDCT_METHOD,
145 JPEG_DEFAULT_IDCT_METHOD,
146 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
149 * GstJpegDec:max-errors:
151 * Error out after receiving N consecutive decoding errors
152 * (-1 = never error out, 0 = automatic, 1 = fail on first error, etc.)
154 * Deprecated: 1.3.1: Property wasn't used internally
156 #ifndef GST_REMOVE_DEPRECATED
157 g_object_class_install_property (gobject_class, PROP_MAX_ERRORS,
158 g_param_spec_int ("max-errors", "Maximum Consecutive Decoding Errors",
159 "(Deprecated) Error out after receiving N consecutive decoding errors"
160 " (-1 = never fail, 0 = automatic, 1 = fail on first error)",
161 -1, G_MAXINT, JPEG_DEFAULT_MAX_ERRORS,
162 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_DEPRECATED));
165 gst_element_class_add_static_pad_template (element_class,
166 &gst_jpeg_dec_src_pad_template);
167 gst_element_class_add_static_pad_template (element_class,
168 &gst_jpeg_dec_sink_pad_template);
169 gst_element_class_set_static_metadata (element_class, "JPEG image decoder",
170 "Codec/Decoder/Image", "Decode images from JPEG format",
171 "Wim Taymans <wim@fluendo.com>");
173 vdec_class->start = gst_jpeg_dec_start;
174 vdec_class->stop = gst_jpeg_dec_stop;
175 vdec_class->flush = gst_jpeg_dec_flush;
176 vdec_class->parse = gst_jpeg_dec_parse;
177 vdec_class->set_format = gst_jpeg_dec_set_format;
178 vdec_class->handle_frame = gst_jpeg_dec_handle_frame;
179 vdec_class->decide_allocation = gst_jpeg_dec_decide_allocation;
180 vdec_class->sink_event = gst_jpeg_dec_sink_event;
182 GST_DEBUG_CATEGORY_INIT (jpeg_dec_debug, "jpegdec", 0, "JPEG decoder");
183 GST_DEBUG_CATEGORY_GET (GST_CAT_PERFORMANCE, "GST_PERFORMANCE");
187 gst_jpeg_dec_fill_input_buffer (j_decompress_ptr cinfo)
189 /* We pass in full frame initially, if this get called, the frame is most likely
195 gst_jpeg_dec_init_source (j_decompress_ptr cinfo)
197 GST_LOG_OBJECT (CINFO_GET_JPEGDEC (cinfo), "init_source");
202 gst_jpeg_dec_skip_input_data (j_decompress_ptr cinfo, glong num_bytes)
204 GstJpegDec *dec = CINFO_GET_JPEGDEC (cinfo);
206 GST_DEBUG_OBJECT (dec, "skip %ld bytes", num_bytes);
208 if (num_bytes > 0 && cinfo->src->bytes_in_buffer >= num_bytes) {
209 cinfo->src->next_input_byte += (size_t) num_bytes;
210 cinfo->src->bytes_in_buffer -= (size_t) num_bytes;
215 gst_jpeg_dec_resync_to_restart (j_decompress_ptr cinfo, gint desired)
217 GST_LOG_OBJECT (CINFO_GET_JPEGDEC (cinfo), "resync_to_start");
222 gst_jpeg_dec_term_source (j_decompress_ptr cinfo)
224 GST_LOG_OBJECT (CINFO_GET_JPEGDEC (cinfo), "term_source");
229 gst_jpeg_dec_my_output_message (j_common_ptr cinfo)
231 return; /* do nothing */
235 gst_jpeg_dec_my_emit_message (j_common_ptr cinfo, int msg_level)
237 /* GST_LOG_OBJECT (CINFO_GET_JPEGDEC (&cinfo), "msg_level=%d", msg_level); */
242 gst_jpeg_dec_my_error_exit (j_common_ptr cinfo)
244 struct GstJpegDecErrorMgr *err_mgr = (struct GstJpegDecErrorMgr *) cinfo->err;
246 (*cinfo->err->output_message) (cinfo);
247 longjmp (err_mgr->setjmp_buffer, 1);
251 gst_jpeg_dec_init (GstJpegDec * dec)
253 GST_DEBUG ("initializing");
256 memset (&dec->cinfo, 0, sizeof (dec->cinfo));
257 memset (&dec->jerr, 0, sizeof (dec->jerr));
258 dec->cinfo.err = jpeg_std_error (&dec->jerr.pub);
259 dec->jerr.pub.output_message = gst_jpeg_dec_my_output_message;
260 dec->jerr.pub.emit_message = gst_jpeg_dec_my_emit_message;
261 dec->jerr.pub.error_exit = gst_jpeg_dec_my_error_exit;
263 jpeg_create_decompress (&dec->cinfo);
265 dec->cinfo.src = (struct jpeg_source_mgr *) &dec->jsrc;
266 dec->cinfo.src->init_source = gst_jpeg_dec_init_source;
267 dec->cinfo.src->fill_input_buffer = gst_jpeg_dec_fill_input_buffer;
268 dec->cinfo.src->skip_input_data = gst_jpeg_dec_skip_input_data;
269 dec->cinfo.src->resync_to_restart = gst_jpeg_dec_resync_to_restart;
270 dec->cinfo.src->term_source = gst_jpeg_dec_term_source;
273 /* init properties */
274 dec->idct_method = JPEG_DEFAULT_IDCT_METHOD;
275 dec->max_errors = JPEG_DEFAULT_MAX_ERRORS;
277 gst_video_decoder_set_use_default_pad_acceptcaps (GST_VIDEO_DECODER_CAST
279 GST_PAD_SET_ACCEPT_TEMPLATE (GST_VIDEO_DECODER_SINK_PAD (dec));
282 static inline gboolean
283 gst_jpeg_dec_parse_tag_has_entropy_segment (guint8 tag)
285 if (tag == 0xda || (tag >= 0xd0 && tag <= 0xd7))
291 gst_jpeg_dec_parse (GstVideoDecoder * bdec, GstVideoCodecFrame * frame,
292 GstAdapter * adapter, gboolean at_eos)
297 gint offset = 0, noffset;
298 GstJpegDec *dec = (GstJpegDec *) bdec;
300 GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT (frame);
302 /* FIXME : The overhead of using scan_uint32 is massive */
304 size = gst_adapter_available (adapter);
305 GST_DEBUG ("Parsing jpeg image data (%u bytes)", size);
308 GST_DEBUG ("Flushing all data out");
311 /* If we have leftover data, throw it away */
312 if (!dec->saw_header)
314 goto have_full_frame;
320 if (!dec->saw_header) {
322 /* we expect at least 4 bytes, first of which start marker */
324 gst_adapter_masked_scan_uint32 (adapter, 0xffff0000, 0xffd80000, 0,
327 GST_DEBUG ("ret:%d", ret);
332 gst_adapter_flush (adapter, ret);
335 dec->saw_header = TRUE;
342 GST_DEBUG ("offset:%d, size:%d", offset, size);
345 gst_adapter_masked_scan_uint32_peek (adapter, 0x0000ff00, 0x0000ff00,
346 offset, size - offset, &value);
348 /* lost sync if 0xff marker not where expected */
349 if ((resync = (noffset != offset))) {
350 GST_DEBUG ("Lost sync at 0x%08x, resyncing", offset + 2);
352 /* may have marker, but could have been resyncng */
353 resync = resync || dec->parse_resync;
354 /* Skip over extra 0xff */
355 while ((noffset >= 0) && ((value & 0xff) == 0xff)) {
358 gst_adapter_masked_scan_uint32_peek (adapter, 0x0000ff00, 0x0000ff00,
359 noffset, size - noffset, &value);
361 /* enough bytes left for marker? (we need 0xNN after the 0xff) */
363 GST_DEBUG ("at end of input and no EOI marker found, need more data");
367 /* now lock on the marker we found */
369 value = value & 0xff;
371 GST_DEBUG ("0x%08x: EOI marker", offset + 2);
372 /* clear parse state */
373 dec->saw_header = FALSE;
374 dec->parse_resync = FALSE;
376 goto have_full_frame;
379 /* Skip this frame if we found another SOI marker */
380 GST_DEBUG ("0x%08x: SOI marker before EOI, skipping", offset + 2);
381 dec->parse_resync = FALSE;
387 if (value >= 0xd0 && value <= 0xd7)
390 /* peek tag and subsequent length */
391 if (offset + 2 + 4 > size)
394 gst_adapter_masked_scan_uint32_peek (adapter, 0x0, 0x0, offset + 2, 4,
396 frame_len = frame_len & 0xffff;
398 GST_DEBUG ("0x%08x: tag %02x, frame_len=%u", offset + 2, value, frame_len);
399 /* the frame length includes the 2 bytes for the length; here we want at
400 * least 2 more bytes at the end for an end marker */
401 if (offset + 2 + 2 + frame_len + 2 > size) {
405 if (gst_jpeg_dec_parse_tag_has_entropy_segment (value)) {
406 guint eseglen = dec->parse_entropy_len;
408 GST_DEBUG ("0x%08x: finding entropy segment length (eseglen:%d)",
409 offset + 2, eseglen);
410 if (size < offset + 2 + frame_len + eseglen)
412 noffset = offset + 2 + frame_len + dec->parse_entropy_len;
414 GST_DEBUG ("noffset:%d, size:%d, size - noffset:%d",
415 noffset, size, size - noffset);
416 noffset = gst_adapter_masked_scan_uint32_peek (adapter, 0x0000ff00,
417 0x0000ff00, noffset, size - noffset, &value);
420 dec->parse_entropy_len = size - offset - 4 - frame_len - 2;
423 if ((value & 0xff) != 0x00) {
424 eseglen = noffset - offset - frame_len - 2;
429 dec->parse_entropy_len = 0;
430 frame_len += eseglen;
431 GST_DEBUG ("entropy segment length=%u => frame_len=%u", eseglen,
435 /* check if we will still be in sync if we interpret
436 * this as a sync point and skip this frame */
437 noffset = offset + frame_len + 2;
438 noffset = gst_adapter_masked_scan_uint32 (adapter, 0x0000ff00, 0x0000ff00,
441 /* ignore and continue resyncing until we hit the end
442 * of our data or find a sync point that looks okay */
446 GST_DEBUG ("found sync at 0x%x", offset + 2);
449 /* Add current data to output buffer */
450 toadd += frame_len + 2;
451 offset += frame_len + 2;
456 gst_video_decoder_add_to_frame (bdec, toadd);
457 return GST_VIDEO_DECODER_FLOW_NEED_DATA;
461 gst_video_decoder_add_to_frame (bdec, toadd);
462 GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT (frame);
463 return gst_video_decoder_have_frame (bdec);
466 gst_adapter_flush (adapter, size);
471 /* shamelessly ripped from jpegutils.c in mjpegtools */
473 add_huff_table (j_decompress_ptr dinfo,
474 JHUFF_TBL ** htblptr, const UINT8 * bits, const UINT8 * val)
475 /* Define a Huffman table */
479 if (*htblptr == NULL)
480 *htblptr = jpeg_alloc_huff_table ((j_common_ptr) dinfo);
484 /* Copy the number-of-symbols-of-each-code-length counts */
485 memcpy ((*htblptr)->bits, bits, sizeof ((*htblptr)->bits));
487 /* Validate the counts. We do this here mainly so we can copy the right
488 * number of symbols from the val[] array, without risking marching off
489 * the end of memory. jchuff.c will do a more thorough test later.
492 for (len = 1; len <= 16; len++)
493 nsymbols += bits[len];
494 if (nsymbols < 1 || nsymbols > 256)
495 g_error ("jpegutils.c: add_huff_table failed badly. ");
497 memcpy ((*htblptr)->huffval, val, nsymbols * sizeof (UINT8));
503 std_huff_tables (j_decompress_ptr dinfo)
504 /* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
505 /* IMPORTANT: these are only valid for 8-bit data precision! */
507 static const UINT8 bits_dc_luminance[17] =
508 { /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
509 static const UINT8 val_dc_luminance[] =
510 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
512 static const UINT8 bits_dc_chrominance[17] =
513 { /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
514 static const UINT8 val_dc_chrominance[] =
515 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
517 static const UINT8 bits_ac_luminance[17] =
518 { /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
519 static const UINT8 val_ac_luminance[] =
520 { 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
521 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
522 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
523 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
524 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
525 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
526 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
527 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
528 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
529 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
530 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
531 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
532 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
533 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
534 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
535 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
536 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
537 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
538 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
539 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
543 static const UINT8 bits_ac_chrominance[17] =
544 { /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
545 static const UINT8 val_ac_chrominance[] =
546 { 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
547 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
548 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
549 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
550 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
551 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
552 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
553 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
554 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
555 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
556 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
557 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
558 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
559 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
560 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
561 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
562 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
563 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
564 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
565 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
569 add_huff_table (dinfo, &dinfo->dc_huff_tbl_ptrs[0],
570 bits_dc_luminance, val_dc_luminance);
571 add_huff_table (dinfo, &dinfo->ac_huff_tbl_ptrs[0],
572 bits_ac_luminance, val_ac_luminance);
573 add_huff_table (dinfo, &dinfo->dc_huff_tbl_ptrs[1],
574 bits_dc_chrominance, val_dc_chrominance);
575 add_huff_table (dinfo, &dinfo->ac_huff_tbl_ptrs[1],
576 bits_ac_chrominance, val_ac_chrominance);
582 guarantee_huff_tables (j_decompress_ptr dinfo)
584 if ((dinfo->dc_huff_tbl_ptrs[0] == NULL) &&
585 (dinfo->dc_huff_tbl_ptrs[1] == NULL) &&
586 (dinfo->ac_huff_tbl_ptrs[0] == NULL) &&
587 (dinfo->ac_huff_tbl_ptrs[1] == NULL)) {
588 GST_DEBUG ("Generating standard Huffman tables for this frame.");
589 std_huff_tables (dinfo);
594 gst_jpeg_dec_set_format (GstVideoDecoder * dec, GstVideoCodecState * state)
596 GstJpegDec *jpeg = GST_JPEG_DEC (dec);
598 if (jpeg->input_state)
599 gst_video_codec_state_unref (jpeg->input_state);
600 jpeg->input_state = gst_video_codec_state_ref (state);
608 hresamplecpy1 (guint8 * dest, const guint8 * src, guint len)
612 for (i = 0; i < len; ++i) {
613 /* equivalent to: dest[i] = src[i << 1] */
622 gst_jpeg_dec_free_buffers (GstJpegDec * dec)
626 for (i = 0; i < 16; i++) {
627 g_free (dec->idr_y[i]);
628 g_free (dec->idr_u[i]);
629 g_free (dec->idr_v[i]);
630 dec->idr_y[i] = NULL;
631 dec->idr_u[i] = NULL;
632 dec->idr_v[i] = NULL;
635 dec->idr_width_allocated = 0;
638 static inline gboolean
639 gst_jpeg_dec_ensure_buffers (GstJpegDec * dec, guint maxrowbytes)
643 if (G_LIKELY (dec->idr_width_allocated == maxrowbytes))
646 /* FIXME: maybe just alloc one or three blocks altogether? */
647 for (i = 0; i < 16; i++) {
648 dec->idr_y[i] = g_try_realloc (dec->idr_y[i], maxrowbytes);
649 dec->idr_u[i] = g_try_realloc (dec->idr_u[i], maxrowbytes);
650 dec->idr_v[i] = g_try_realloc (dec->idr_v[i], maxrowbytes);
652 if (G_UNLIKELY (!dec->idr_y[i] || !dec->idr_u[i] || !dec->idr_v[i])) {
653 GST_WARNING_OBJECT (dec, "out of memory, i=%d, bytes=%u", i, maxrowbytes);
658 dec->idr_width_allocated = maxrowbytes;
659 GST_LOG_OBJECT (dec, "allocated temp memory, %u bytes/row", maxrowbytes);
664 gst_jpeg_dec_decode_grayscale (GstJpegDec * dec, GstVideoFrame * frame)
667 guchar **scanarray[1] = { rows };
672 gint pstride, rstride;
674 GST_DEBUG_OBJECT (dec, "indirect decoding of grayscale");
676 width = GST_VIDEO_FRAME_WIDTH (frame);
677 height = GST_VIDEO_FRAME_HEIGHT (frame);
679 if (G_UNLIKELY (!gst_jpeg_dec_ensure_buffers (dec, GST_ROUND_UP_32 (width))))
682 base[0] = GST_VIDEO_FRAME_COMP_DATA (frame, 0);
683 pstride = GST_VIDEO_FRAME_COMP_PSTRIDE (frame, 0);
684 rstride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 0);
686 memcpy (rows, dec->idr_y, 16 * sizeof (gpointer));
690 lines = jpeg_read_raw_data (&dec->cinfo, scanarray, DCTSIZE);
691 if (G_LIKELY (lines > 0)) {
692 for (j = 0; (j < DCTSIZE) && (i < height); j++, i++) {
696 for (k = 0; k < width; k++) {
697 base[0][p] = rows[j][k];
703 GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
709 gst_jpeg_dec_decode_rgb (GstJpegDec * dec, GstVideoFrame * frame)
711 guchar *r_rows[16], *g_rows[16], *b_rows[16];
712 guchar **scanarray[3] = { r_rows, g_rows, b_rows };
716 guint pstride, rstride;
719 GST_DEBUG_OBJECT (dec, "indirect decoding of RGB");
721 width = GST_VIDEO_FRAME_WIDTH (frame);
722 height = GST_VIDEO_FRAME_HEIGHT (frame);
724 if (G_UNLIKELY (!gst_jpeg_dec_ensure_buffers (dec, GST_ROUND_UP_32 (width))))
727 for (i = 0; i < 3; i++)
728 base[i] = GST_VIDEO_FRAME_COMP_DATA (frame, i);
730 pstride = GST_VIDEO_FRAME_COMP_PSTRIDE (frame, 0);
731 rstride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 0);
733 memcpy (r_rows, dec->idr_y, 16 * sizeof (gpointer));
734 memcpy (g_rows, dec->idr_u, 16 * sizeof (gpointer));
735 memcpy (b_rows, dec->idr_v, 16 * sizeof (gpointer));
739 lines = jpeg_read_raw_data (&dec->cinfo, scanarray, DCTSIZE);
740 if (G_LIKELY (lines > 0)) {
741 for (j = 0; (j < DCTSIZE) && (i < height); j++, i++) {
745 for (k = 0; k < width; k++) {
746 base[0][p] = r_rows[j][k];
747 base[1][p] = g_rows[j][k];
748 base[2][p] = b_rows[j][k];
756 GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
762 gst_jpeg_dec_decode_indirect (GstJpegDec * dec, GstVideoFrame * frame, gint r_v,
765 guchar *y_rows[16], *u_rows[16], *v_rows[16];
766 guchar **scanarray[3] = { y_rows, u_rows, v_rows };
769 guchar *base[3], *last[3];
773 GST_DEBUG_OBJECT (dec,
774 "unadvantageous width or r_h, taking slow route involving memcpy");
776 width = GST_VIDEO_FRAME_WIDTH (frame);
777 height = GST_VIDEO_FRAME_HEIGHT (frame);
779 if (G_UNLIKELY (!gst_jpeg_dec_ensure_buffers (dec, GST_ROUND_UP_32 (width))))
782 for (i = 0; i < 3; i++) {
783 base[i] = GST_VIDEO_FRAME_COMP_DATA (frame, i);
784 stride[i] = GST_VIDEO_FRAME_COMP_STRIDE (frame, i);
785 /* make sure we don't make jpeglib write beyond our buffer,
786 * which might happen if (height % (r_v*DCTSIZE)) != 0 */
787 last[i] = base[i] + (GST_VIDEO_FRAME_COMP_STRIDE (frame, i) *
788 (GST_VIDEO_FRAME_COMP_HEIGHT (frame, i) - 1));
791 memcpy (y_rows, dec->idr_y, 16 * sizeof (gpointer));
792 memcpy (u_rows, dec->idr_u, 16 * sizeof (gpointer));
793 memcpy (v_rows, dec->idr_v, 16 * sizeof (gpointer));
795 /* fill chroma components for grayscale */
797 GST_DEBUG_OBJECT (dec, "grayscale, filling chroma");
798 for (i = 0; i < 16; i++) {
799 memset (u_rows[i], GST_ROUND_UP_32 (width), 0x80);
800 memset (v_rows[i], GST_ROUND_UP_32 (width), 0x80);
804 for (i = 0; i < height; i += r_v * DCTSIZE) {
805 lines = jpeg_read_raw_data (&dec->cinfo, scanarray, r_v * DCTSIZE);
806 if (G_LIKELY (lines > 0)) {
807 for (j = 0, k = 0; j < (r_v * DCTSIZE); j += r_v, k++) {
808 if (G_LIKELY (base[0] <= last[0])) {
809 memcpy (base[0], y_rows[j], stride[0]);
810 base[0] += stride[0];
813 if (G_LIKELY (base[0] <= last[0])) {
814 memcpy (base[0], y_rows[j + 1], stride[0]);
815 base[0] += stride[0];
818 if (G_LIKELY (base[1] <= last[1] && base[2] <= last[2])) {
820 memcpy (base[1], u_rows[k], stride[1]);
821 memcpy (base[2], v_rows[k], stride[2]);
822 } else if (r_h == 1) {
823 hresamplecpy1 (base[1], u_rows[k], stride[1]);
824 hresamplecpy1 (base[2], v_rows[k], stride[2]);
826 /* FIXME: implement (at least we avoid crashing by doing nothing) */
830 if (r_v == 2 || (k & 1) != 0) {
831 base[1] += stride[1];
832 base[2] += stride[2];
836 GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
842 gst_jpeg_dec_decode_direct (GstJpegDec * dec, GstVideoFrame * frame)
844 guchar **line[3]; /* the jpeg line buffer */
845 guchar *y[4 * DCTSIZE] = { NULL, }; /* alloc enough for the lines */
846 guchar *u[4 * DCTSIZE] = { NULL, }; /* r_v will be <4 */
847 guchar *v[4 * DCTSIZE] = { NULL, };
849 gint lines, v_samp[3];
850 guchar *base[3], *last[3];
858 v_samp[0] = dec->cinfo.comp_info[0].v_samp_factor;
859 v_samp[1] = dec->cinfo.comp_info[1].v_samp_factor;
860 v_samp[2] = dec->cinfo.comp_info[2].v_samp_factor;
862 if (G_UNLIKELY (v_samp[0] > 2 || v_samp[1] > 2 || v_samp[2] > 2))
863 goto format_not_supported;
865 height = GST_VIDEO_FRAME_HEIGHT (frame);
867 for (i = 0; i < 3; i++) {
868 base[i] = GST_VIDEO_FRAME_COMP_DATA (frame, i);
869 stride[i] = GST_VIDEO_FRAME_COMP_STRIDE (frame, i);
870 /* make sure we don't make jpeglib write beyond our buffer,
871 * which might happen if (height % (r_v*DCTSIZE)) != 0 */
872 last[i] = base[i] + (GST_VIDEO_FRAME_COMP_STRIDE (frame, i) *
873 (GST_VIDEO_FRAME_COMP_HEIGHT (frame, i) - 1));
876 /* let jpeglib decode directly into our final buffer */
877 GST_DEBUG_OBJECT (dec, "decoding directly into output buffer");
879 for (i = 0; i < height; i += v_samp[0] * DCTSIZE) {
880 for (j = 0; j < (v_samp[0] * DCTSIZE); ++j) {
882 line[0][j] = base[0] + (i + j) * stride[0];
883 if (G_UNLIKELY (line[0][j] > last[0]))
884 line[0][j] = last[0];
886 if (v_samp[1] == v_samp[0]) {
887 line[1][j] = base[1] + ((i + j) / 2) * stride[1];
888 } else if (j < (v_samp[1] * DCTSIZE)) {
889 line[1][j] = base[1] + ((i / 2) + j) * stride[1];
891 if (G_UNLIKELY (line[1][j] > last[1]))
892 line[1][j] = last[1];
894 if (v_samp[2] == v_samp[0]) {
895 line[2][j] = base[2] + ((i + j) / 2) * stride[2];
896 } else if (j < (v_samp[2] * DCTSIZE)) {
897 line[2][j] = base[2] + ((i / 2) + j) * stride[2];
899 if (G_UNLIKELY (line[2][j] > last[2]))
900 line[2][j] = last[2];
903 lines = jpeg_read_raw_data (&dec->cinfo, line, v_samp[0] * DCTSIZE);
904 if (G_UNLIKELY (!lines)) {
905 GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
910 format_not_supported:
912 gboolean ret = GST_FLOW_OK;
914 GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
915 (_("Failed to decode JPEG image")),
916 ("Unsupported subsampling schema: v_samp factors: %u %u %u", v_samp[0],
917 v_samp[1], v_samp[2]), ret);
924 gst_jpeg_dec_negotiate (GstJpegDec * dec, gint width, gint height, gint clrspc)
926 GstVideoCodecState *outstate;
928 GstVideoFormat format;
932 format = GST_VIDEO_FORMAT_RGB;
935 format = GST_VIDEO_FORMAT_GRAY8;
938 format = GST_VIDEO_FORMAT_I420;
942 /* Compare to currently configured output state */
943 outstate = gst_video_decoder_get_output_state (GST_VIDEO_DECODER (dec));
945 info = &outstate->info;
947 if (width == GST_VIDEO_INFO_WIDTH (info) &&
948 height == GST_VIDEO_INFO_HEIGHT (info) &&
949 format == GST_VIDEO_INFO_FORMAT (info)) {
950 gst_video_codec_state_unref (outstate);
953 gst_video_codec_state_unref (outstate);
957 gst_video_decoder_set_output_state (GST_VIDEO_DECODER (dec), format,
958 width, height, dec->input_state);
965 outstate->info.colorimetry.range = GST_VIDEO_COLOR_RANGE_0_255;
966 outstate->info.colorimetry.matrix = GST_VIDEO_COLOR_MATRIX_BT601;
967 outstate->info.colorimetry.transfer = GST_VIDEO_TRANSFER_UNKNOWN;
968 outstate->info.colorimetry.primaries = GST_VIDEO_COLOR_PRIMARIES_UNKNOWN;
972 gst_video_codec_state_unref (outstate);
974 gst_video_decoder_negotiate (GST_VIDEO_DECODER (dec));
976 GST_DEBUG_OBJECT (dec, "max_v_samp_factor=%d", dec->cinfo.max_v_samp_factor);
977 GST_DEBUG_OBJECT (dec, "max_h_samp_factor=%d", dec->cinfo.max_h_samp_factor);
981 gst_jpeg_dec_handle_frame (GstVideoDecoder * bdec, GstVideoCodecFrame * frame)
983 GstFlowReturn ret = GST_FLOW_OK;
984 GstJpegDec *dec = (GstJpegDec *) bdec;
985 GstVideoFrame vframe;
989 gboolean need_unmap = TRUE;
990 GstVideoCodecState *state = NULL;
991 gboolean release_frame = TRUE;
993 dec->current_frame = frame;
994 gst_buffer_map (frame->input_buffer, &dec->current_frame_map, GST_MAP_READ);
996 dec->cinfo.src->next_input_byte = dec->current_frame_map.data;
997 dec->cinfo.src->bytes_in_buffer = dec->current_frame_map.size;
999 if (setjmp (dec->jerr.setjmp_buffer)) {
1000 code = dec->jerr.pub.msg_code;
1002 if (code == JERR_INPUT_EOF) {
1003 GST_DEBUG ("jpeg input EOF error, we probably need more data");
1004 goto need_more_data;
1010 hdr_ok = jpeg_read_header (&dec->cinfo, TRUE);
1011 if (G_UNLIKELY (hdr_ok != JPEG_HEADER_OK)) {
1012 GST_WARNING_OBJECT (dec, "reading the header failed, %d", hdr_ok);
1015 GST_LOG_OBJECT (dec, "num_components=%d", dec->cinfo.num_components);
1016 GST_LOG_OBJECT (dec, "jpeg_color_space=%d", dec->cinfo.jpeg_color_space);
1018 if (!dec->cinfo.num_components || !dec->cinfo.comp_info)
1019 goto components_not_supported;
1021 r_h = dec->cinfo.comp_info[0].h_samp_factor;
1022 r_v = dec->cinfo.comp_info[0].v_samp_factor;
1024 GST_LOG_OBJECT (dec, "r_h = %d, r_v = %d", r_h, r_v);
1026 if (dec->cinfo.num_components > 3)
1027 goto components_not_supported;
1029 /* verify color space expectation to avoid going *boom* or bogus output */
1030 if (dec->cinfo.jpeg_color_space != JCS_YCbCr &&
1031 dec->cinfo.jpeg_color_space != JCS_GRAYSCALE &&
1032 dec->cinfo.jpeg_color_space != JCS_RGB)
1033 goto unsupported_colorspace;
1035 #ifndef GST_DISABLE_GST_DEBUG
1039 for (i = 0; i < dec->cinfo.num_components; ++i) {
1040 GST_LOG_OBJECT (dec, "[%d] h_samp_factor=%d, v_samp_factor=%d, cid=%d",
1041 i, dec->cinfo.comp_info[i].h_samp_factor,
1042 dec->cinfo.comp_info[i].v_samp_factor,
1043 dec->cinfo.comp_info[i].component_id);
1048 /* prepare for raw output */
1049 dec->cinfo.do_fancy_upsampling = FALSE;
1050 dec->cinfo.do_block_smoothing = FALSE;
1051 dec->cinfo.out_color_space = dec->cinfo.jpeg_color_space;
1052 dec->cinfo.dct_method = dec->idct_method;
1053 dec->cinfo.raw_data_out = TRUE;
1055 GST_LOG_OBJECT (dec, "starting decompress");
1056 guarantee_huff_tables (&dec->cinfo);
1057 if (!jpeg_start_decompress (&dec->cinfo)) {
1058 GST_WARNING_OBJECT (dec, "failed to start decompression cycle");
1061 /* sanity checks to get safe and reasonable output */
1062 switch (dec->cinfo.jpeg_color_space) {
1064 if (dec->cinfo.num_components != 1)
1065 goto invalid_yuvrgbgrayscale;
1068 if (dec->cinfo.num_components != 3 || dec->cinfo.max_v_samp_factor > 1 ||
1069 dec->cinfo.max_h_samp_factor > 1)
1070 goto invalid_yuvrgbgrayscale;
1073 if (dec->cinfo.num_components != 3 ||
1074 r_v > 2 || r_v < dec->cinfo.comp_info[0].v_samp_factor ||
1075 r_v < dec->cinfo.comp_info[1].v_samp_factor ||
1076 r_h < dec->cinfo.comp_info[0].h_samp_factor ||
1077 r_h < dec->cinfo.comp_info[1].h_samp_factor)
1078 goto invalid_yuvrgbgrayscale;
1081 g_assert_not_reached ();
1085 width = dec->cinfo.output_width;
1086 height = dec->cinfo.output_height;
1088 if (G_UNLIKELY (width < MIN_WIDTH || width > MAX_WIDTH ||
1089 height < MIN_HEIGHT || height > MAX_HEIGHT))
1092 gst_jpeg_dec_negotiate (dec, width, height, dec->cinfo.jpeg_color_space);
1094 state = gst_video_decoder_get_output_state (bdec);
1095 ret = gst_video_decoder_allocate_output_frame (bdec, frame);
1096 if (G_UNLIKELY (ret != GST_FLOW_OK))
1099 if (!gst_video_frame_map (&vframe, &state->info, frame->output_buffer,
1103 if (setjmp (dec->jerr.setjmp_buffer)) {
1104 code = dec->jerr.pub.msg_code;
1105 gst_video_frame_unmap (&vframe);
1109 GST_LOG_OBJECT (dec, "width %d, height %d", width, height);
1111 if (dec->cinfo.jpeg_color_space == JCS_RGB) {
1112 gst_jpeg_dec_decode_rgb (dec, &vframe);
1113 } else if (dec->cinfo.jpeg_color_space == JCS_GRAYSCALE) {
1114 gst_jpeg_dec_decode_grayscale (dec, &vframe);
1116 GST_LOG_OBJECT (dec, "decompressing (reqired scanline buffer height = %u)",
1117 dec->cinfo.rec_outbuf_height);
1119 /* For some widths jpeglib requires more horizontal padding than I420
1120 * provides. In those cases we need to decode into separate buffers and then
1121 * copy over the data into our final picture buffer, otherwise jpeglib might
1122 * write over the end of a line into the beginning of the next line,
1123 * resulting in blocky artifacts on the left side of the picture. */
1124 if (G_UNLIKELY (width % (dec->cinfo.max_h_samp_factor * DCTSIZE) != 0
1125 || dec->cinfo.comp_info[0].h_samp_factor != 2
1126 || dec->cinfo.comp_info[1].h_samp_factor != 1
1127 || dec->cinfo.comp_info[2].h_samp_factor != 1)) {
1128 GST_CAT_LOG_OBJECT (GST_CAT_PERFORMANCE, dec,
1129 "indirect decoding using extra buffer copy");
1130 gst_jpeg_dec_decode_indirect (dec, &vframe, r_v, r_h,
1131 dec->cinfo.num_components);
1133 ret = gst_jpeg_dec_decode_direct (dec, &vframe);
1135 if (G_UNLIKELY (ret != GST_FLOW_OK))
1136 goto decode_direct_failed;
1140 gst_video_frame_unmap (&vframe);
1142 if (setjmp (dec->jerr.setjmp_buffer)) {
1143 code = dec->jerr.pub.msg_code;
1147 GST_LOG_OBJECT (dec, "decompressing finished");
1148 jpeg_finish_decompress (&dec->cinfo);
1150 gst_buffer_unmap (frame->input_buffer, &dec->current_frame_map);
1151 ret = gst_video_decoder_finish_frame (bdec, frame);
1152 release_frame = FALSE;
1160 gst_buffer_unmap (frame->input_buffer, &dec->current_frame_map);
1163 gst_video_decoder_release_frame (bdec, frame);
1166 gst_video_codec_state_unref (state);
1173 GST_LOG_OBJECT (dec, "we need more data");
1180 GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
1181 (_("Failed to decode JPEG image")),
1182 ("Picture is too small or too big (%ux%u)", width, height), ret);
1183 ret = GST_FLOW_ERROR;
1188 gchar err_msg[JMSG_LENGTH_MAX];
1190 dec->jerr.pub.format_message ((j_common_ptr) (&dec->cinfo), err_msg);
1192 GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
1193 (_("Failed to decode JPEG image")), ("Decode error #%u: %s", code,
1196 gst_buffer_unmap (frame->input_buffer, &dec->current_frame_map);
1197 gst_video_decoder_drop_frame (bdec, frame);
1198 release_frame = FALSE;
1200 jpeg_abort_decompress (&dec->cinfo);
1204 decode_direct_failed:
1206 /* already posted an error message */
1207 jpeg_abort_decompress (&dec->cinfo);
1212 const gchar *reason;
1214 reason = gst_flow_get_name (ret);
1216 GST_DEBUG_OBJECT (dec, "failed to alloc buffer, reason %s", reason);
1217 /* Reset for next time */
1218 jpeg_abort_decompress (&dec->cinfo);
1219 if (ret != GST_FLOW_EOS && ret != GST_FLOW_FLUSHING &&
1220 ret != GST_FLOW_NOT_LINKED) {
1221 GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
1222 (_("Failed to decode JPEG image")),
1223 ("Buffer allocation failed, reason: %s", reason), ret);
1224 jpeg_abort_decompress (&dec->cinfo);
1228 components_not_supported:
1230 GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
1231 (_("Failed to decode JPEG image")),
1232 ("number of components not supported: %d (max 3)",
1233 dec->cinfo.num_components), ret);
1234 jpeg_abort_decompress (&dec->cinfo);
1237 unsupported_colorspace:
1239 GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
1240 (_("Failed to decode JPEG image")),
1241 ("Picture has unknown or unsupported colourspace"), ret);
1242 jpeg_abort_decompress (&dec->cinfo);
1245 invalid_yuvrgbgrayscale:
1247 GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
1248 (_("Failed to decode JPEG image")),
1249 ("Picture is corrupt or unhandled YUV/RGB/grayscale layout"), ret);
1250 jpeg_abort_decompress (&dec->cinfo);
1256 gst_jpeg_dec_decide_allocation (GstVideoDecoder * bdec, GstQuery * query)
1258 GstBufferPool *pool = NULL;
1259 GstStructure *config;
1261 if (!GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation (bdec, query))
1264 if (gst_query_get_n_allocation_pools (query) > 0)
1265 gst_query_parse_nth_allocation_pool (query, 0, &pool, NULL, NULL, NULL);
1270 config = gst_buffer_pool_get_config (pool);
1271 if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL)) {
1272 gst_buffer_pool_config_add_option (config,
1273 GST_BUFFER_POOL_OPTION_VIDEO_META);
1275 gst_buffer_pool_set_config (pool, config);
1276 gst_object_unref (pool);
1282 gst_jpeg_dec_sink_event (GstVideoDecoder * bdec, GstEvent * event)
1284 const GstSegment *segment;
1286 if (GST_EVENT_TYPE (event) != GST_EVENT_SEGMENT)
1289 gst_event_parse_segment (event, &segment);
1291 if (segment->format == GST_FORMAT_TIME)
1292 gst_video_decoder_set_packetized (bdec, TRUE);
1294 gst_video_decoder_set_packetized (bdec, FALSE);
1297 return GST_VIDEO_DECODER_CLASS (parent_class)->sink_event (bdec, event);
1301 gst_jpeg_dec_start (GstVideoDecoder * bdec)
1303 GstJpegDec *dec = (GstJpegDec *) bdec;
1305 dec->saw_header = FALSE;
1306 dec->parse_entropy_len = 0;
1307 dec->parse_resync = FALSE;
1309 gst_video_decoder_set_packetized (bdec, FALSE);
1315 gst_jpeg_dec_flush (GstVideoDecoder * bdec)
1317 GstJpegDec *dec = (GstJpegDec *) bdec;
1319 jpeg_abort_decompress (&dec->cinfo);
1320 dec->parse_entropy_len = 0;
1321 dec->parse_resync = FALSE;
1322 dec->saw_header = FALSE;
1328 gst_jpeg_dec_set_property (GObject * object, guint prop_id,
1329 const GValue * value, GParamSpec * pspec)
1333 dec = GST_JPEG_DEC (object);
1336 case PROP_IDCT_METHOD:
1337 dec->idct_method = g_value_get_enum (value);
1339 #ifndef GST_REMOVE_DEPRECATED
1340 case PROP_MAX_ERRORS:
1341 g_atomic_int_set (&dec->max_errors, g_value_get_int (value));
1345 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1351 gst_jpeg_dec_get_property (GObject * object, guint prop_id, GValue * value,
1356 dec = GST_JPEG_DEC (object);
1359 case PROP_IDCT_METHOD:
1360 g_value_set_enum (value, dec->idct_method);
1362 #ifndef GST_REMOVE_DEPRECATED
1363 case PROP_MAX_ERRORS:
1364 g_value_set_int (value, g_atomic_int_get (&dec->max_errors));
1368 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1374 gst_jpeg_dec_stop (GstVideoDecoder * bdec)
1376 GstJpegDec *dec = (GstJpegDec *) bdec;
1378 gst_jpeg_dec_free_buffers (dec);