2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
20 * SECTION:element-jpegenc
22 * Encodes jpeg images.
25 * <title>Example launch line</title>
27 * gst-launch videotestsrc num-buffers=50 ! video/x-raw-yuv, framerate='(fraction)'5/1 ! jpegenc ! avimux ! filesink location=mjpeg.avi
28 * ]| a pipeline to mux 5 JPEG frames per second into a 10 sec. long motion jpeg
38 #include "gstjpegenc.h"
40 #include <gst/video/video.h>
43 /* setting smoothig seems to have no effect in libjepeg
44 #define ENABLE_SMOOTHING 1
47 GST_DEBUG_CATEGORY_STATIC (jpegenc_debug);
48 #define GST_CAT_DEFAULT jpegenc_debug
50 #define JPEG_DEFAULT_QUALITY 85
51 #define JPEG_DEFAULT_SMOOTHING 0
52 #define JPEG_DEFAULT_IDCT_METHOD JDCT_FASTEST
54 /* JpegEnc signals and args */
70 static void gst_jpegenc_reset (GstJpegEnc * enc);
71 static void gst_jpegenc_base_init (gpointer g_class);
72 static void gst_jpegenc_class_init (GstJpegEnc * klass);
73 static void gst_jpegenc_init (GstJpegEnc * jpegenc);
74 static void gst_jpegenc_finalize (GObject * object);
76 static GstFlowReturn gst_jpegenc_chain (GstPad * pad, GstBuffer * buf);
77 static gboolean gst_jpegenc_setcaps (GstPad * pad, GstCaps * caps);
78 static GstCaps *gst_jpegenc_getcaps (GstPad * pad);
80 static void gst_jpegenc_resync (GstJpegEnc * jpegenc);
81 static void gst_jpegenc_set_property (GObject * object, guint prop_id,
82 const GValue * value, GParamSpec * pspec);
83 static void gst_jpegenc_get_property (GObject * object, guint prop_id,
84 GValue * value, GParamSpec * pspec);
85 static GstStateChangeReturn gst_jpegenc_change_state (GstElement * element,
86 GstStateChange transition);
89 static GstElementClass *parent_class = NULL;
90 static guint gst_jpegenc_signals[LAST_SIGNAL] = { 0 };
93 gst_jpegenc_get_type (void)
95 static GType jpegenc_type = 0;
98 static const GTypeInfo jpegenc_info = {
100 (GBaseInitFunc) gst_jpegenc_base_init,
102 (GClassInitFunc) gst_jpegenc_class_init,
107 (GInstanceInitFunc) gst_jpegenc_init,
111 g_type_register_static (GST_TYPE_ELEMENT, "GstJpegEnc", &jpegenc_info,
118 static GstStaticPadTemplate gst_jpegenc_sink_pad_template =
119 GST_STATIC_PAD_TEMPLATE ("sink",
122 GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV
123 ("{ I420, YV12, YUY2, UYVY, Y41B, Y42B, YVYU, Y444 }") "; "
124 GST_VIDEO_CAPS_RGB "; " GST_VIDEO_CAPS_BGR "; "
125 GST_VIDEO_CAPS_RGBx "; " GST_VIDEO_CAPS_xRGB "; "
126 GST_VIDEO_CAPS_BGRx "; " GST_VIDEO_CAPS_xBGR "; "
127 GST_VIDEO_CAPS_GRAY8)
131 static GstStaticPadTemplate gst_jpegenc_src_pad_template =
132 GST_STATIC_PAD_TEMPLATE ("src",
135 GST_STATIC_CAPS ("image/jpeg, "
136 "width = (int) [ 16, 65535 ], "
137 "height = (int) [ 16, 65535 ], " "framerate = (fraction) [ 0/1, MAX ]")
141 gst_jpegenc_base_init (gpointer g_class)
143 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
145 gst_element_class_add_static_pad_template (element_class,
146 &gst_jpegenc_sink_pad_template);
147 gst_element_class_add_static_pad_template (element_class,
148 &gst_jpegenc_src_pad_template);
149 gst_element_class_set_details_simple (element_class, "JPEG image encoder",
150 "Codec/Encoder/Image",
151 "Encode images in JPEG format", "Wim Taymans <wim.taymans@tvd.be>");
155 gst_jpegenc_class_init (GstJpegEnc * klass)
157 GObjectClass *gobject_class;
158 GstElementClass *gstelement_class;
160 gobject_class = (GObjectClass *) klass;
161 gstelement_class = (GstElementClass *) klass;
163 parent_class = g_type_class_peek_parent (klass);
165 gst_jpegenc_signals[FRAME_ENCODED] =
166 g_signal_new ("frame-encoded", G_TYPE_FROM_CLASS (klass),
167 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstJpegEncClass, frame_encoded), NULL,
168 NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
170 gobject_class->set_property = gst_jpegenc_set_property;
171 gobject_class->get_property = gst_jpegenc_get_property;
174 g_object_class_install_property (gobject_class, PROP_QUALITY,
175 g_param_spec_int ("quality", "Quality", "Quality of encoding",
176 0, 100, JPEG_DEFAULT_QUALITY,
177 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
179 #ifdef ENABLE_SMOOTHING
180 /* disabled, since it doesn't seem to work */
181 g_object_class_install_property (gobject_class, PROP_SMOOTHING,
182 g_param_spec_int ("smoothing", "Smoothing", "Smoothing factor",
183 0, 100, JPEG_DEFAULT_SMOOTHING,
184 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
187 g_object_class_install_property (gobject_class, PROP_IDCT_METHOD,
188 g_param_spec_enum ("idct-method", "IDCT Method",
189 "The IDCT algorithm to use", GST_TYPE_IDCT_METHOD,
190 JPEG_DEFAULT_IDCT_METHOD,
191 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
193 gstelement_class->change_state = gst_jpegenc_change_state;
195 gobject_class->finalize = gst_jpegenc_finalize;
197 GST_DEBUG_CATEGORY_INIT (jpegenc_debug, "jpegenc", 0,
198 "JPEG encoding element");
202 gst_jpegenc_init_destination (j_compress_ptr cinfo)
204 GST_DEBUG ("gst_jpegenc_chain: init_destination");
208 gst_jpegenc_flush_destination (j_compress_ptr cinfo)
210 GstBuffer *overflow_buffer;
211 guint32 old_buffer_size;
212 GstJpegEnc *jpegenc = (GstJpegEnc *) (cinfo->client_data);
215 GST_DEBUG_OBJECT (jpegenc,
216 "gst_jpegenc_chain: flush_destination: buffer too small");
218 /* Our output buffer wasn't big enough.
219 * Make a new buffer that's twice the size, */
220 old_buffer_size = GST_BUFFER_SIZE (jpegenc->output_buffer);
221 ret = gst_pad_alloc_buffer_and_set_caps (jpegenc->srcpad,
222 GST_BUFFER_OFFSET_NONE, old_buffer_size * 2,
223 GST_PAD_CAPS (jpegenc->srcpad), &overflow_buffer);
224 /* handle here if needed */
225 if (ret != GST_FLOW_OK) {
226 overflow_buffer = gst_buffer_new_and_alloc (old_buffer_size * 2);
227 gst_buffer_set_caps (overflow_buffer, GST_PAD_CAPS (jpegenc->srcpad));
230 memcpy (GST_BUFFER_DATA (overflow_buffer),
231 GST_BUFFER_DATA (jpegenc->output_buffer), old_buffer_size);
233 gst_buffer_copy_metadata (overflow_buffer, jpegenc->output_buffer,
234 GST_BUFFER_COPY_TIMESTAMPS);
236 /* drop it into place, */
237 gst_buffer_unref (jpegenc->output_buffer);
238 jpegenc->output_buffer = overflow_buffer;
240 /* and last, update libjpeg on where to work. */
241 jpegenc->jdest.next_output_byte =
242 GST_BUFFER_DATA (jpegenc->output_buffer) + old_buffer_size;
243 jpegenc->jdest.free_in_buffer =
244 GST_BUFFER_SIZE (jpegenc->output_buffer) - old_buffer_size;
250 gst_jpegenc_term_destination (j_compress_ptr cinfo)
252 GstJpegEnc *jpegenc = (GstJpegEnc *) (cinfo->client_data);
253 GST_DEBUG_OBJECT (jpegenc, "gst_jpegenc_chain: term_source");
255 /* Trim the buffer size and push it. */
256 GST_BUFFER_SIZE (jpegenc->output_buffer) =
257 GST_BUFFER_SIZE (jpegenc->output_buffer) - jpegenc->jdest.free_in_buffer;
259 g_signal_emit (G_OBJECT (jpegenc), gst_jpegenc_signals[FRAME_ENCODED], 0);
261 jpegenc->last_ret = gst_pad_push (jpegenc->srcpad, jpegenc->output_buffer);
262 jpegenc->output_buffer = NULL;
266 gst_jpegenc_init (GstJpegEnc * jpegenc)
268 /* create the sink and src pads */
270 gst_pad_new_from_static_template (&gst_jpegenc_sink_pad_template, "sink");
271 gst_pad_set_chain_function (jpegenc->sinkpad,
272 GST_DEBUG_FUNCPTR (gst_jpegenc_chain));
273 gst_pad_set_getcaps_function (jpegenc->sinkpad,
274 GST_DEBUG_FUNCPTR (gst_jpegenc_getcaps));
275 gst_pad_set_setcaps_function (jpegenc->sinkpad,
276 GST_DEBUG_FUNCPTR (gst_jpegenc_setcaps));
277 gst_element_add_pad (GST_ELEMENT (jpegenc), jpegenc->sinkpad);
280 gst_pad_new_from_static_template (&gst_jpegenc_src_pad_template, "src");
281 gst_pad_use_fixed_caps (jpegenc->srcpad);
282 gst_element_add_pad (GST_ELEMENT (jpegenc), jpegenc->srcpad);
284 /* reset the initial video state */
286 jpegenc->height = -1;
289 memset (&jpegenc->cinfo, 0, sizeof (jpegenc->cinfo));
290 memset (&jpegenc->jerr, 0, sizeof (jpegenc->jerr));
291 jpegenc->cinfo.err = jpeg_std_error (&jpegenc->jerr);
292 jpeg_create_compress (&jpegenc->cinfo);
294 jpegenc->jdest.init_destination = gst_jpegenc_init_destination;
295 jpegenc->jdest.empty_output_buffer = gst_jpegenc_flush_destination;
296 jpegenc->jdest.term_destination = gst_jpegenc_term_destination;
297 jpegenc->cinfo.dest = &jpegenc->jdest;
298 jpegenc->cinfo.client_data = jpegenc;
300 /* init properties */
301 jpegenc->quality = JPEG_DEFAULT_QUALITY;
302 jpegenc->smoothing = JPEG_DEFAULT_SMOOTHING;
303 jpegenc->idct_method = JPEG_DEFAULT_IDCT_METHOD;
305 gst_jpegenc_reset (jpegenc);
309 gst_jpegenc_reset (GstJpegEnc * enc)
313 g_free (enc->line[0]);
314 g_free (enc->line[1]);
315 g_free (enc->line[2]);
319 for (i = 0; i < 3; i++) {
320 for (j = 0; j < 4 * DCTSIZE; j++) {
321 g_free (enc->row[i][j]);
322 enc->row[i][j] = NULL;
328 enc->format = GST_VIDEO_FORMAT_UNKNOWN;
329 enc->fps_den = enc->par_den = 0;
330 enc->height = enc->width = 0;
334 gst_jpegenc_finalize (GObject * object)
336 GstJpegEnc *filter = GST_JPEGENC (object);
338 jpeg_destroy_compress (&filter->cinfo);
340 G_OBJECT_CLASS (parent_class)->finalize (object);
344 gst_jpegenc_getcaps (GstPad * pad)
346 GstJpegEnc *jpegenc = GST_JPEGENC (gst_pad_get_parent (pad));
347 GstCaps *caps, *othercaps;
348 const GstCaps *templ;
350 GstStructure *structure = NULL;
352 /* we want to proxy properties like width, height and framerate from the
353 other end of the element */
355 othercaps = gst_pad_peer_get_caps_reffed (jpegenc->srcpad);
356 if (othercaps == NULL ||
357 gst_caps_is_empty (othercaps) || gst_caps_is_any (othercaps)) {
358 caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
362 caps = gst_caps_new_empty ();
363 templ = gst_pad_get_pad_template_caps (pad);
365 for (i = 0; i < gst_caps_get_size (templ); i++) {
366 /* pick fields from peer caps */
367 for (j = 0; j < gst_caps_get_size (othercaps); j++) {
368 GstStructure *s = gst_caps_get_structure (othercaps, j);
371 structure = gst_structure_copy (gst_caps_get_structure (templ, i));
372 if ((val = gst_structure_get_value (s, "width")))
373 gst_structure_set_value (structure, "width", val);
374 if ((val = gst_structure_get_value (s, "height")))
375 gst_structure_set_value (structure, "height", val);
376 if ((val = gst_structure_get_value (s, "framerate")))
377 gst_structure_set_value (structure, "framerate", val);
379 gst_caps_merge_structure (caps, structure);
385 gst_caps_replace (&othercaps, NULL);
386 gst_object_unref (jpegenc);
392 gst_jpegenc_setcaps (GstPad * pad, GstCaps * caps)
394 GstJpegEnc *enc = GST_JPEGENC (gst_pad_get_parent (pad));
395 GstVideoFormat format;
397 gint fps_num, fps_den;
398 gint par_num, par_den;
403 /* get info from caps */
404 if (!gst_video_format_parse_caps (caps, &format, &width, &height))
406 /* optional; pass along if present */
407 fps_num = fps_den = -1;
408 par_num = par_den = -1;
409 gst_video_parse_caps_framerate (caps, &fps_num, &fps_den);
410 gst_video_parse_caps_pixel_aspect_ratio (caps, &par_num, &par_den);
412 if (width == enc->width && height == enc->height && enc->format == format
413 && fps_num == enc->fps_num && fps_den == enc->fps_den
414 && par_num == enc->par_num && par_den == enc->par_den)
417 /* store input description */
418 enc->format = format;
420 enc->height = height;
421 enc->fps_num = fps_num;
422 enc->fps_den = fps_den;
423 enc->par_num = par_num;
424 enc->par_den = par_den;
426 /* prepare a cached image description */
427 enc->channels = 3 + (gst_video_format_has_alpha (format) ? 1 : 0);
428 /* ... but any alpha is disregarded in encoding */
429 if (gst_video_format_is_gray (format))
435 for (i = 0; i < enc->channels; ++i) {
436 enc->cwidth[i] = gst_video_format_get_component_width (format, i, width);
437 enc->cheight[i] = gst_video_format_get_component_height (format, i, height);
438 enc->offset[i] = gst_video_format_get_component_offset (format, i, width,
440 enc->stride[i] = gst_video_format_get_row_stride (format, i, width);
441 enc->inc[i] = gst_video_format_get_pixel_stride (format, i);
442 enc->h_samp[i] = GST_ROUND_UP_4 (width) / enc->cwidth[i];
443 enc->h_max_samp = MAX (enc->h_max_samp, enc->h_samp[i]);
444 enc->v_samp[i] = GST_ROUND_UP_4 (height) / enc->cheight[i];
445 enc->v_max_samp = MAX (enc->v_max_samp, enc->v_samp[i]);
447 /* samp should only be 1, 2 or 4 */
448 g_assert (enc->h_max_samp <= 4);
449 g_assert (enc->v_max_samp <= 4);
451 /* maximum is invariant, as one of the components should have samp 1 */
452 for (i = 0; i < enc->channels; ++i) {
453 enc->h_samp[i] = enc->h_max_samp / enc->h_samp[i];
454 enc->v_samp[i] = enc->v_max_samp / enc->v_samp[i];
456 enc->planar = (enc->inc[0] == 1 && enc->inc[1] == 1 && enc->inc[2] == 1);
458 othercaps = gst_caps_copy (gst_pad_get_pad_template_caps (enc->srcpad));
459 gst_caps_set_simple (othercaps,
460 "width", G_TYPE_INT, enc->width, "height", G_TYPE_INT, enc->height, NULL);
461 if (enc->fps_den > 0)
462 gst_caps_set_simple (othercaps,
463 "framerate", GST_TYPE_FRACTION, enc->fps_num, enc->fps_den, NULL);
464 if (enc->par_den > 0)
465 gst_caps_set_simple (othercaps,
466 "pixel-aspect-ratio", GST_TYPE_FRACTION, enc->par_num, enc->par_den,
469 ret = gst_pad_set_caps (enc->srcpad, othercaps);
470 gst_caps_unref (othercaps);
473 gst_jpegenc_resync (enc);
475 gst_object_unref (enc);
482 GST_WARNING_OBJECT (enc, "refused caps %" GST_PTR_FORMAT, caps);
483 gst_object_unref (enc);
489 gst_jpegenc_resync (GstJpegEnc * jpegenc)
494 GST_DEBUG_OBJECT (jpegenc, "resync");
496 jpegenc->cinfo.image_width = width = jpegenc->width;
497 jpegenc->cinfo.image_height = height = jpegenc->height;
498 jpegenc->cinfo.input_components = jpegenc->channels;
500 GST_DEBUG_OBJECT (jpegenc, "width %d, height %d", width, height);
501 GST_DEBUG_OBJECT (jpegenc, "format %d", jpegenc->format);
503 if (gst_video_format_is_rgb (jpegenc->format)) {
504 GST_DEBUG_OBJECT (jpegenc, "RGB");
505 jpegenc->cinfo.in_color_space = JCS_RGB;
506 } else if (gst_video_format_is_gray (jpegenc->format)) {
507 GST_DEBUG_OBJECT (jpegenc, "gray");
508 jpegenc->cinfo.in_color_space = JCS_GRAYSCALE;
510 GST_DEBUG_OBJECT (jpegenc, "YUV");
511 jpegenc->cinfo.in_color_space = JCS_YCbCr;
514 /* input buffer size as max output */
515 jpegenc->bufsize = gst_video_format_get_size (jpegenc->format, width, height);
516 jpeg_set_defaults (&jpegenc->cinfo);
517 jpegenc->cinfo.raw_data_in = TRUE;
518 /* duh, libjpeg maps RGB to YUV ... and don't expect some conversion */
519 if (jpegenc->cinfo.in_color_space == JCS_RGB)
520 jpeg_set_colorspace (&jpegenc->cinfo, JCS_RGB);
522 GST_DEBUG_OBJECT (jpegenc, "h_max_samp=%d, v_max_samp=%d",
523 jpegenc->h_max_samp, jpegenc->v_max_samp);
524 /* image dimension info */
525 for (i = 0; i < jpegenc->channels; i++) {
526 GST_DEBUG_OBJECT (jpegenc, "comp %i: h_samp=%d, v_samp=%d", i,
527 jpegenc->h_samp[i], jpegenc->v_samp[i]);
528 jpegenc->cinfo.comp_info[i].h_samp_factor = jpegenc->h_samp[i];
529 jpegenc->cinfo.comp_info[i].v_samp_factor = jpegenc->v_samp[i];
530 g_free (jpegenc->line[i]);
531 jpegenc->line[i] = g_new (guchar *, jpegenc->v_max_samp * DCTSIZE);
532 if (!jpegenc->planar) {
533 for (j = 0; j < jpegenc->v_max_samp * DCTSIZE; j++) {
534 g_free (jpegenc->row[i][j]);
535 jpegenc->row[i][j] = g_malloc (width);
536 jpegenc->line[i][j] = jpegenc->row[i][j];
541 /* guard against a potential error in gst_jpegenc_term_destination
542 which occurs iff bufsize % 4 < free_space_remaining */
543 jpegenc->bufsize = GST_ROUND_UP_4 (jpegenc->bufsize);
545 jpeg_suppress_tables (&jpegenc->cinfo, TRUE);
547 GST_DEBUG_OBJECT (jpegenc, "resync done");
551 gst_jpegenc_chain (GstPad * pad, GstBuffer * buf)
558 guchar *base[3], *end[3];
561 jpegenc = GST_JPEGENC (GST_OBJECT_PARENT (pad));
563 if (G_UNLIKELY (jpegenc->width <= 0 || jpegenc->height <= 0))
566 data = GST_BUFFER_DATA (buf);
567 size = GST_BUFFER_SIZE (buf);
569 GST_LOG_OBJECT (jpegenc, "got buffer of %lu bytes", size);
572 gst_pad_alloc_buffer_and_set_caps (jpegenc->srcpad,
573 GST_BUFFER_OFFSET_NONE, jpegenc->bufsize, GST_PAD_CAPS (jpegenc->srcpad),
574 &jpegenc->output_buffer);
576 if (ret != GST_FLOW_OK)
579 gst_buffer_copy_metadata (jpegenc->output_buffer, buf,
580 GST_BUFFER_COPY_TIMESTAMPS);
582 height = jpegenc->height;
584 for (i = 0; i < jpegenc->channels; i++) {
585 base[i] = data + jpegenc->offset[i];
586 end[i] = base[i] + jpegenc->cheight[i] * jpegenc->stride[i];
589 jpegenc->jdest.next_output_byte = GST_BUFFER_DATA (jpegenc->output_buffer);
590 jpegenc->jdest.free_in_buffer = GST_BUFFER_SIZE (jpegenc->output_buffer);
592 /* prepare for raw input */
593 #if JPEG_LIB_VERSION >= 70
594 jpegenc->cinfo.do_fancy_downsampling = FALSE;
596 jpegenc->cinfo.smoothing_factor = jpegenc->smoothing;
597 jpegenc->cinfo.dct_method = jpegenc->idct_method;
598 jpeg_set_quality (&jpegenc->cinfo, jpegenc->quality, TRUE);
599 jpeg_start_compress (&jpegenc->cinfo, TRUE);
601 GST_LOG_OBJECT (jpegenc, "compressing");
603 if (jpegenc->planar) {
604 for (i = 0; i < height; i += jpegenc->v_max_samp * DCTSIZE) {
605 for (k = 0; k < jpegenc->channels; k++) {
606 for (j = 0; j < jpegenc->v_samp[k] * DCTSIZE; j++) {
607 jpegenc->line[k][j] = base[k];
608 if (base[k] + jpegenc->stride[k] < end[k])
609 base[k] += jpegenc->stride[k];
612 jpeg_write_raw_data (&jpegenc->cinfo, jpegenc->line,
613 jpegenc->v_max_samp * DCTSIZE);
616 for (i = 0; i < height; i += jpegenc->v_max_samp * DCTSIZE) {
617 for (k = 0; k < jpegenc->channels; k++) {
618 for (j = 0; j < jpegenc->v_samp[k] * DCTSIZE; j++) {
622 /* ouch, copy line */
624 dst = jpegenc->line[k][j];
625 for (l = jpegenc->cwidth[k]; l > 0; l--) {
627 src += jpegenc->inc[k];
630 if (base[k] + jpegenc->stride[k] < end[k])
631 base[k] += jpegenc->stride[k];
634 jpeg_write_raw_data (&jpegenc->cinfo, jpegenc->line,
635 jpegenc->v_max_samp * DCTSIZE);
639 /* This will ensure that gst_jpegenc_term_destination is called; we push
640 the final output buffer from there */
641 jpeg_finish_compress (&jpegenc->cinfo);
642 GST_LOG_OBJECT (jpegenc, "compressing done");
645 gst_buffer_unref (buf);
652 GST_WARNING_OBJECT (jpegenc, "no input format set (no caps on buffer)");
653 ret = GST_FLOW_NOT_NEGOTIATED;
659 gst_jpegenc_set_property (GObject * object, guint prop_id,
660 const GValue * value, GParamSpec * pspec)
662 GstJpegEnc *jpegenc = GST_JPEGENC (object);
664 GST_OBJECT_LOCK (jpegenc);
668 jpegenc->quality = g_value_get_int (value);
670 #ifdef ENABLE_SMOOTHING
672 jpegenc->smoothing = g_value_get_int (value);
675 case PROP_IDCT_METHOD:
676 jpegenc->idct_method = g_value_get_enum (value);
679 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
683 GST_OBJECT_UNLOCK (jpegenc);
687 gst_jpegenc_get_property (GObject * object, guint prop_id, GValue * value,
690 GstJpegEnc *jpegenc = GST_JPEGENC (object);
692 GST_OBJECT_LOCK (jpegenc);
696 g_value_set_int (value, jpegenc->quality);
698 #ifdef ENABLE_SMOOTHING
700 g_value_set_int (value, jpegenc->smoothing);
703 case PROP_IDCT_METHOD:
704 g_value_set_enum (value, jpegenc->idct_method);
707 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
711 GST_OBJECT_UNLOCK (jpegenc);
714 static GstStateChangeReturn
715 gst_jpegenc_change_state (GstElement * element, GstStateChange transition)
717 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
718 GstJpegEnc *filter = GST_JPEGENC (element);
720 switch (transition) {
721 case GST_STATE_CHANGE_NULL_TO_READY:
722 GST_DEBUG_OBJECT (element, "setting line buffers");
723 filter->line[0] = NULL;
724 filter->line[1] = NULL;
725 filter->line[2] = NULL;
731 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
732 if (ret == GST_STATE_CHANGE_FAILURE)
735 switch (transition) {
736 case GST_STATE_CHANGE_PAUSED_TO_READY:
737 gst_jpegenc_reset (filter);