1 /* GStreamer
2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * Copyright (C) 2012 Collabora Ltd.
4 * Author : Edward Hervey <edward@collabora.com>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21 /**
22 * SECTION:element-jpegenc
23 * @title: jpegenc
24 *
25 * Encodes jpeg images.
26 *
27 * ## Example launch line
28 * |[
29 * gst-launch-1.0 videotestsrc num-buffers=50 ! video/x-raw, framerate='(fraction)'5/1 ! jpegenc ! avimux ! filesink location=mjpeg.avi
30 * ]| a pipeline to mux 5 JPEG frames per second into a 10 sec. long motion jpeg
31 * avi.
32 *
33 */
34
35 #ifdef HAVE_CONFIG_H
36 #include "config.h"
37 #endif
38 #include <string.h>
39
40 #include "gstjpeg.h"
41 #include "gstjpegenc.h"
42 #include "gstjpegelements.h"
43 #include <gst/video/video.h>
44 #include <gst/video/gstvideometa.h>
45 #include <gst/base/base.h>
46
47 /* experimental */
48 /* setting smoothig seems to have no effect in libjepeg
49 #define ENABLE_SMOOTHING 1
50 */
51
52 GST_DEBUG_CATEGORY_STATIC (jpegenc_debug);
53 #define GST_CAT_DEFAULT jpegenc_debug
54
55 #define JPEG_DEFAULT_QUALITY 85
56 #define JPEG_DEFAULT_SMOOTHING 0
57 #define JPEG_DEFAULT_IDCT_METHOD JDCT_FASTEST
58 #define JPEG_DEFAULT_SNAPSHOT FALSE
59
60 /* JpegEnc signals and args */
61 enum
62 {
63 /* FILL ME */
64 LAST_SIGNAL
65 };
66
67 enum
68 {
69 PROP_0,
70 PROP_QUALITY,
71 PROP_SMOOTHING,
72 PROP_IDCT_METHOD,
73 PROP_SNAPSHOT
74 };
75
76 static void gst_jpegenc_finalize (GObject * object);
77
78 static void gst_jpegenc_resync (GstJpegEnc * jpegenc);
79 static void gst_jpegenc_set_property (GObject * object, guint prop_id,
80 const GValue * value, GParamSpec * pspec);
81 static void gst_jpegenc_get_property (GObject * object, guint prop_id,
82 GValue * value, GParamSpec * pspec);
83
84 static gboolean gst_jpegenc_start (GstVideoEncoder * benc);
85 static gboolean gst_jpegenc_stop (GstVideoEncoder * benc);
86 static gboolean gst_jpegenc_set_format (GstVideoEncoder * encoder,
87 GstVideoCodecState * state);
88 static GstFlowReturn gst_jpegenc_handle_frame (GstVideoEncoder * encoder,
89 GstVideoCodecFrame * frame);
90 static gboolean gst_jpegenc_propose_allocation (GstVideoEncoder * encoder,
91 GstQuery * query);
92
93 /* static guint gst_jpegenc_signals[LAST_SIGNAL] = { 0 }; */
94
95 #define gst_jpegenc_parent_class parent_class
96 G_DEFINE_TYPE (GstJpegEnc, gst_jpegenc, GST_TYPE_VIDEO_ENCODER);
97 GST_ELEMENT_REGISTER_DEFINE (jpegenc, "jpegenc", GST_RANK_PRIMARY,
98 GST_TYPE_JPEGENC);
99
100 /* *INDENT-OFF* */
101 static GstStaticPadTemplate gst_jpegenc_sink_pad_template =
102 GST_STATIC_PAD_TEMPLATE ("sink",
103 GST_PAD_SINK,
104 GST_PAD_ALWAYS,
105 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE
106 ("{ I420, YV12, YUY2, UYVY, Y41B, Y42B, YVYU, Y444, NV21, "
107 "NV12, RGB, BGR, RGBx, xRGB, BGRx, xBGR, GRAY8 }"))
108 );
109 /* *INDENT-ON* */
110
111 static GstStaticPadTemplate gst_jpegenc_src_pad_template =
112 GST_STATIC_PAD_TEMPLATE ("src",
113 GST_PAD_SRC,
114 GST_PAD_ALWAYS,
115 GST_STATIC_CAPS ("image/jpeg, "
116 "width = (int) [ 1, 65535 ], "
117 "height = (int) [ 1, 65535 ], "
118 "framerate = (fraction) [ 0/1, MAX ], "
119 "sof-marker = (int) { 0, 1, 2, 4, 9 }")
120 );
121
122 static void
gst_jpegenc_class_init(GstJpegEncClass * klass)123 gst_jpegenc_class_init (GstJpegEncClass * klass)
124 {
125 GObjectClass *gobject_class;
126 GstElementClass *element_class;
127 GstVideoEncoderClass *venc_class;
128
129 gobject_class = (GObjectClass *) klass;
130 element_class = (GstElementClass *) klass;
131 venc_class = (GstVideoEncoderClass *) klass;
132
133 parent_class = g_type_class_peek_parent (klass);
134
135 gobject_class->finalize = gst_jpegenc_finalize;
136 gobject_class->set_property = gst_jpegenc_set_property;
137 gobject_class->get_property = gst_jpegenc_get_property;
138
139 g_object_class_install_property (gobject_class, PROP_QUALITY,
140 g_param_spec_int ("quality", "Quality", "Quality of encoding",
141 0, 100, JPEG_DEFAULT_QUALITY,
142 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
143 GST_PARAM_MUTABLE_PLAYING));
144
145 #ifdef ENABLE_SMOOTHING
146 /* disabled, since it doesn't seem to work */
147 g_object_class_install_property (gobject_class, PROP_SMOOTHING,
148 g_param_spec_int ("smoothing", "Smoothing", "Smoothing factor",
149 0, 100, JPEG_DEFAULT_SMOOTHING,
150 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
151 #endif
152
153 g_object_class_install_property (gobject_class, PROP_IDCT_METHOD,
154 g_param_spec_enum ("idct-method", "IDCT Method",
155 "The IDCT algorithm to use", GST_TYPE_IDCT_METHOD,
156 JPEG_DEFAULT_IDCT_METHOD,
157 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
158 /**
159 * GstJpegEnc:snapshot:
160 *
161 * Send EOS after encoding a frame, useful for snapshots.
162 *
163 * Since: 1.14
164 */
165 g_object_class_install_property (gobject_class, PROP_SNAPSHOT,
166 g_param_spec_boolean ("snapshot", "Snapshot",
167 "Send EOS after encoding a frame, useful for snapshots",
168 JPEG_DEFAULT_SNAPSHOT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
169
170 gst_element_class_add_static_pad_template (element_class,
171 &gst_jpegenc_sink_pad_template);
172 gst_element_class_add_static_pad_template (element_class,
173 &gst_jpegenc_src_pad_template);
174
175 gst_element_class_set_static_metadata (element_class, "JPEG image encoder",
176 "Codec/Encoder/Image", "Encode images in JPEG format",
177 "Wim Taymans <wim.taymans@tvd.be>");
178
179 venc_class->start = gst_jpegenc_start;
180 venc_class->stop = gst_jpegenc_stop;
181 venc_class->set_format = gst_jpegenc_set_format;
182 venc_class->handle_frame = gst_jpegenc_handle_frame;
183 venc_class->propose_allocation = gst_jpegenc_propose_allocation;
184
185 GST_DEBUG_CATEGORY_INIT (jpegenc_debug, "jpegenc", 0,
186 "JPEG encoding element");
187 }
188
189 static void
gst_jpegenc_init_destination(j_compress_ptr cinfo)190 gst_jpegenc_init_destination (j_compress_ptr cinfo)
191 {
192 GST_DEBUG ("gst_jpegenc_chain: init_destination");
193 }
194
195 static void
ensure_memory(GstJpegEnc * jpegenc)196 ensure_memory (GstJpegEnc * jpegenc)
197 {
198 GstMemory *new_memory;
199 GstMapInfo map;
200 gsize old_size, desired_size, new_size;
201 guint8 *new_data;
202 static GstAllocationParams params = { 0, 3, 0, 0, };
203
204 old_size = jpegenc->output_map.size;
205 if (old_size == 0)
206 desired_size = jpegenc->bufsize;
207 else
208 desired_size = old_size * 2;
209
210 /* Our output memory wasn't big enough.
211 * Make a new memory that's twice the size, */
212 new_memory = gst_allocator_alloc (NULL, desired_size, ¶ms);
213 gst_memory_map (new_memory, &map, GST_MAP_READWRITE);
214 new_data = map.data;
215 new_size = map.size;
216
217 /* copy previous data if any */
218 if (jpegenc->output_mem) {
219 memcpy (new_data, jpegenc->output_map.data, old_size);
220 gst_memory_unmap (jpegenc->output_mem, &jpegenc->output_map);
221 gst_memory_unref (jpegenc->output_mem);
222 }
223
224 /* drop it into place, */
225 jpegenc->output_mem = new_memory;
226 jpegenc->output_map = map;
227
228 /* and last, update libjpeg on where to work. */
229 jpegenc->jdest.next_output_byte = new_data + old_size;
230 jpegenc->jdest.free_in_buffer = new_size - old_size;
231 }
232
233 static boolean
gst_jpegenc_flush_destination(j_compress_ptr cinfo)234 gst_jpegenc_flush_destination (j_compress_ptr cinfo)
235 {
236 GstJpegEnc *jpegenc = (GstJpegEnc *) (cinfo->client_data);
237
238 GST_DEBUG_OBJECT (jpegenc,
239 "gst_jpegenc_chain: flush_destination: buffer too small");
240
241 ensure_memory (jpegenc);
242
243 return TRUE;
244 }
245
246 static void
gst_jpegenc_term_destination(j_compress_ptr cinfo)247 gst_jpegenc_term_destination (j_compress_ptr cinfo)
248 {
249 GstBuffer *outbuf;
250 GstJpegEnc *jpegenc = (GstJpegEnc *) (cinfo->client_data);
251 gsize memory_size = jpegenc->output_map.size - jpegenc->jdest.free_in_buffer;
252 GstByteReader reader =
253 GST_BYTE_READER_INIT (jpegenc->output_map.data, memory_size);
254 guint16 marker;
255 gint sof_marker = -1;
256
257 GST_DEBUG_OBJECT (jpegenc, "gst_jpegenc_chain: term_source");
258
259 /* Find the SOF marker */
260 while (gst_byte_reader_get_uint16_be (&reader, &marker)) {
261 /* SOF marker */
262 if (marker >> 4 == 0x0ffc) {
263 sof_marker = marker & 0x4;
264 break;
265 }
266 }
267
268 gst_memory_unmap (jpegenc->output_mem, &jpegenc->output_map);
269 /* Trim the buffer size. we will push it in the chain function */
270 gst_memory_resize (jpegenc->output_mem, 0, memory_size);
271 jpegenc->output_map.data = NULL;
272 jpegenc->output_map.size = 0;
273
274 if (jpegenc->sof_marker != sof_marker || jpegenc->input_caps_changed) {
275 GstVideoCodecState *output;
276 output =
277 gst_video_encoder_set_output_state (GST_VIDEO_ENCODER (jpegenc),
278 gst_caps_new_simple ("image/jpeg", "sof-marker", G_TYPE_INT, sof_marker,
279 NULL), jpegenc->input_state);
280 gst_video_codec_state_unref (output);
281 jpegenc->sof_marker = sof_marker;
282 jpegenc->input_caps_changed = FALSE;
283 }
284
285 outbuf = gst_buffer_new ();
286 gst_buffer_append_memory (outbuf, jpegenc->output_mem);
287 jpegenc->output_mem = NULL;
288
289 jpegenc->current_frame->output_buffer = outbuf;
290
291 gst_video_frame_unmap (&jpegenc->current_vframe);
292
293 GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT (jpegenc->current_frame);
294
295 jpegenc->res = gst_video_encoder_finish_frame (GST_VIDEO_ENCODER (jpegenc),
296 jpegenc->current_frame);
297 jpegenc->current_frame = NULL;
298 }
299
300 static void
gst_jpegenc_init(GstJpegEnc * jpegenc)301 gst_jpegenc_init (GstJpegEnc * jpegenc)
302 {
303 GST_PAD_SET_ACCEPT_TEMPLATE (GST_VIDEO_ENCODER_SINK_PAD (jpegenc));
304
305 /* setup jpeglib */
306 memset (&jpegenc->cinfo, 0, sizeof (jpegenc->cinfo));
307 memset (&jpegenc->jerr, 0, sizeof (jpegenc->jerr));
308 jpegenc->cinfo.err = jpeg_std_error (&jpegenc->jerr);
309 jpeg_create_compress (&jpegenc->cinfo);
310
311 jpegenc->jdest.init_destination = gst_jpegenc_init_destination;
312 jpegenc->jdest.empty_output_buffer = gst_jpegenc_flush_destination;
313 jpegenc->jdest.term_destination = gst_jpegenc_term_destination;
314 jpegenc->cinfo.dest = &jpegenc->jdest;
315 jpegenc->cinfo.client_data = jpegenc;
316
317 /* init properties */
318 jpegenc->quality = JPEG_DEFAULT_QUALITY;
319 jpegenc->smoothing = JPEG_DEFAULT_SMOOTHING;
320 jpegenc->idct_method = JPEG_DEFAULT_IDCT_METHOD;
321 jpegenc->snapshot = JPEG_DEFAULT_SNAPSHOT;
322 }
323
324 static void
gst_jpegenc_finalize(GObject * object)325 gst_jpegenc_finalize (GObject * object)
326 {
327 GstJpegEnc *filter = GST_JPEGENC (object);
328
329 jpeg_destroy_compress (&filter->cinfo);
330
331 if (filter->input_state)
332 gst_video_codec_state_unref (filter->input_state);
333
334 G_OBJECT_CLASS (parent_class)->finalize (object);
335 }
336
337 static gboolean
gst_jpegenc_set_format(GstVideoEncoder * encoder,GstVideoCodecState * state)338 gst_jpegenc_set_format (GstVideoEncoder * encoder, GstVideoCodecState * state)
339 {
340 GstJpegEnc *enc = GST_JPEGENC (encoder);
341 gint i;
342 GstVideoInfo *info = &state->info;
343
344 if (enc->input_state)
345 gst_video_codec_state_unref (enc->input_state);
346 enc->input_state = gst_video_codec_state_ref (state);
347
348 /* prepare a cached image description */
349 enc->channels = GST_VIDEO_INFO_N_COMPONENTS (info);
350
351 /* ... but any alpha is disregarded in encoding */
352 if (GST_VIDEO_INFO_IS_GRAY (info))
353 enc->channels = 1;
354
355 enc->h_max_samp = 0;
356 enc->v_max_samp = 0;
357 for (i = 0; i < enc->channels; ++i) {
358 enc->cwidth[i] = GST_VIDEO_INFO_COMP_WIDTH (info, i);
359 enc->cheight[i] = GST_VIDEO_INFO_COMP_HEIGHT (info, i);
360 enc->inc[i] = GST_VIDEO_INFO_COMP_PSTRIDE (info, i);
361 enc->h_samp[i] =
362 GST_ROUND_UP_4 (GST_VIDEO_INFO_WIDTH (info)) / enc->cwidth[i];
363 enc->h_max_samp = MAX (enc->h_max_samp, enc->h_samp[i]);
364 enc->v_samp[i] =
365 GST_ROUND_UP_4 (GST_VIDEO_INFO_HEIGHT (info)) / enc->cheight[i];
366 enc->v_max_samp = MAX (enc->v_max_samp, enc->v_samp[i]);
367 }
368 /* samp should only be 1, 2 or 4 */
369 g_assert (enc->h_max_samp <= 4);
370 g_assert (enc->v_max_samp <= 4);
371
372 /* now invert */
373 /* maximum is invariant, as one of the components should have samp 1 */
374 for (i = 0; i < enc->channels; ++i) {
375 GST_DEBUG ("%d %d", enc->h_samp[i], enc->h_max_samp);
376 enc->h_samp[i] = enc->h_max_samp / enc->h_samp[i];
377 enc->v_samp[i] = enc->v_max_samp / enc->v_samp[i];
378 }
379 enc->planar = (enc->inc[0] == 1 && enc->inc[1] == 1 && enc->inc[2] == 1);
380
381 enc->input_caps_changed = TRUE;
382 gst_jpegenc_resync (enc);
383
384 return TRUE;
385 }
386
387 static void
gst_jpegenc_resync(GstJpegEnc * jpegenc)388 gst_jpegenc_resync (GstJpegEnc * jpegenc)
389 {
390 GstVideoInfo *info;
391 gint width, height;
392 gint i, j;
393
394 GST_DEBUG_OBJECT (jpegenc, "resync");
395
396 if (!jpegenc->input_state)
397 return;
398
399 info = &jpegenc->input_state->info;
400
401 jpegenc->cinfo.image_width = width = GST_VIDEO_INFO_WIDTH (info);
402 jpegenc->cinfo.image_height = height = GST_VIDEO_INFO_HEIGHT (info);
403 jpegenc->cinfo.input_components = jpegenc->channels;
404
405 GST_DEBUG_OBJECT (jpegenc, "width %d, height %d", width, height);
406 GST_DEBUG_OBJECT (jpegenc, "format %d", GST_VIDEO_INFO_FORMAT (info));
407
408 if (GST_VIDEO_INFO_IS_RGB (info)) {
409 GST_DEBUG_OBJECT (jpegenc, "RGB");
410 jpegenc->cinfo.in_color_space = JCS_RGB;
411 } else if (GST_VIDEO_INFO_IS_GRAY (info)) {
412 GST_DEBUG_OBJECT (jpegenc, "gray");
413 jpegenc->cinfo.in_color_space = JCS_GRAYSCALE;
414 } else {
415 GST_DEBUG_OBJECT (jpegenc, "YUV");
416 jpegenc->cinfo.in_color_space = JCS_YCbCr;
417 }
418
419 /* input buffer size as max output */
420 jpegenc->bufsize = GST_VIDEO_INFO_SIZE (info);
421 jpeg_set_defaults (&jpegenc->cinfo);
422 jpegenc->cinfo.raw_data_in = TRUE;
423 /* duh, libjpeg maps RGB to YUV ... and don't expect some conversion */
424 if (jpegenc->cinfo.in_color_space == JCS_RGB)
425 jpeg_set_colorspace (&jpegenc->cinfo, JCS_RGB);
426
427 GST_DEBUG_OBJECT (jpegenc, "h_max_samp=%d, v_max_samp=%d",
428 jpegenc->h_max_samp, jpegenc->v_max_samp);
429 /* image dimension info */
430 for (i = 0; i < jpegenc->channels; i++) {
431 GST_DEBUG_OBJECT (jpegenc, "comp %i: h_samp=%d, v_samp=%d", i,
432 jpegenc->h_samp[i], jpegenc->v_samp[i]);
433 jpegenc->cinfo.comp_info[i].h_samp_factor = jpegenc->h_samp[i];
434 jpegenc->cinfo.comp_info[i].v_samp_factor = jpegenc->v_samp[i];
435 g_free (jpegenc->line[i]);
436 jpegenc->line[i] = g_new (guchar *, jpegenc->v_max_samp * DCTSIZE);
437 if (!jpegenc->planar) {
438 for (j = 0; j < jpegenc->v_max_samp * DCTSIZE; j++) {
439 g_free (jpegenc->row[i][j]);
440 jpegenc->row[i][j] = g_malloc (width);
441 jpegenc->line[i][j] = jpegenc->row[i][j];
442 }
443 }
444 }
445
446 /* guard against a potential error in gst_jpegenc_term_destination
447 which occurs iff bufsize % 4 < free_space_remaining */
448 jpegenc->bufsize = GST_ROUND_UP_4 (jpegenc->bufsize);
449
450 jpeg_suppress_tables (&jpegenc->cinfo, TRUE);
451
452 GST_DEBUG_OBJECT (jpegenc, "resync done");
453 }
454
455 static GstFlowReturn
gst_jpegenc_handle_frame(GstVideoEncoder * encoder,GstVideoCodecFrame * frame)456 gst_jpegenc_handle_frame (GstVideoEncoder * encoder, GstVideoCodecFrame * frame)
457 {
458 GstJpegEnc *jpegenc;
459 guint height;
460 guchar *base[3], *end[3];
461 guint stride[3];
462 gint i, j, k;
463 static GstAllocationParams params = { 0, 0, 0, 3, };
464
465 jpegenc = GST_JPEGENC (encoder);
466
467 GST_LOG_OBJECT (jpegenc, "got new frame");
468
469 if (!gst_video_frame_map (&jpegenc->current_vframe,
470 &jpegenc->input_state->info, frame->input_buffer, GST_MAP_READ))
471 goto invalid_frame;
472
473 jpegenc->current_frame = frame;
474
475 height = GST_VIDEO_INFO_HEIGHT (&jpegenc->input_state->info);
476
477 for (i = 0; i < jpegenc->channels; i++) {
478 base[i] = GST_VIDEO_FRAME_COMP_DATA (&jpegenc->current_vframe, i);
479 stride[i] = GST_VIDEO_FRAME_COMP_STRIDE (&jpegenc->current_vframe, i);
480 end[i] =
481 base[i] + GST_VIDEO_FRAME_COMP_HEIGHT (&jpegenc->current_vframe,
482 i) * stride[i];
483 }
484
485 jpegenc->res = GST_FLOW_OK;
486 jpegenc->output_mem = gst_allocator_alloc (NULL, jpegenc->bufsize, ¶ms);
487 gst_memory_map (jpegenc->output_mem, &jpegenc->output_map, GST_MAP_READWRITE);
488
489 jpegenc->jdest.next_output_byte = jpegenc->output_map.data;
490 jpegenc->jdest.free_in_buffer = jpegenc->output_map.size;
491
492 /* prepare for raw input */
493 #if JPEG_LIB_VERSION >= 70
494 jpegenc->cinfo.do_fancy_downsampling = FALSE;
495 #endif
496
497 GST_OBJECT_LOCK (jpegenc);
498 jpegenc->cinfo.smoothing_factor = jpegenc->smoothing;
499 jpegenc->cinfo.dct_method = jpegenc->idct_method;
500 jpeg_set_quality (&jpegenc->cinfo, jpegenc->quality, TRUE);
501 GST_OBJECT_UNLOCK (jpegenc);
502
503 jpeg_start_compress (&jpegenc->cinfo, TRUE);
504
505 GST_LOG_OBJECT (jpegenc, "compressing");
506
507 if (jpegenc->planar) {
508 for (i = 0; i < height; i += jpegenc->v_max_samp * DCTSIZE) {
509 for (k = 0; k < jpegenc->channels; k++) {
510 for (j = 0; j < jpegenc->v_samp[k] * DCTSIZE; j++) {
511 jpegenc->line[k][j] = base[k];
512 if (base[k] + stride[k] < end[k])
513 base[k] += stride[k];
514 }
515 }
516 jpeg_write_raw_data (&jpegenc->cinfo, jpegenc->line,
517 jpegenc->v_max_samp * DCTSIZE);
518 }
519 } else {
520 for (i = 0; i < height; i += jpegenc->v_max_samp * DCTSIZE) {
521 for (k = 0; k < jpegenc->channels; k++) {
522 for (j = 0; j < jpegenc->v_samp[k] * DCTSIZE; j++) {
523 guchar *src, *dst;
524 gint l;
525
526 /* ouch, copy line */
527 src = base[k];
528 dst = jpegenc->line[k][j];
529 for (l = jpegenc->cwidth[k]; l > 0; l--) {
530 *dst = *src;
531 src += jpegenc->inc[k];
532 dst++;
533 }
534 if (base[k] + stride[k] < end[k])
535 base[k] += stride[k];
536 }
537 }
538 jpeg_write_raw_data (&jpegenc->cinfo, jpegenc->line,
539 jpegenc->v_max_samp * DCTSIZE);
540 }
541 }
542
543 /* This will ensure that gst_jpegenc_term_destination is called */
544 jpeg_finish_compress (&jpegenc->cinfo);
545 GST_LOG_OBJECT (jpegenc, "compressing done");
546
547 return (jpegenc->snapshot) ? GST_FLOW_EOS : jpegenc->res;
548
549 invalid_frame:
550 {
551 GST_WARNING_OBJECT (jpegenc, "invalid frame received");
552 return gst_video_encoder_finish_frame (encoder, frame);
553 }
554 }
555
556 static gboolean
gst_jpegenc_propose_allocation(GstVideoEncoder * encoder,GstQuery * query)557 gst_jpegenc_propose_allocation (GstVideoEncoder * encoder, GstQuery * query)
558 {
559 gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
560
561 return GST_VIDEO_ENCODER_CLASS (parent_class)->propose_allocation (encoder,
562 query);
563 }
564
565 static void
gst_jpegenc_set_property(GObject * object,guint prop_id,const GValue * value,GParamSpec * pspec)566 gst_jpegenc_set_property (GObject * object, guint prop_id,
567 const GValue * value, GParamSpec * pspec)
568 {
569 GstJpegEnc *jpegenc = GST_JPEGENC (object);
570
571 GST_OBJECT_LOCK (jpegenc);
572
573 switch (prop_id) {
574 case PROP_QUALITY:
575 jpegenc->quality = g_value_get_int (value);
576 break;
577 #ifdef ENABLE_SMOOTHING
578 case PROP_SMOOTHING:
579 jpegenc->smoothing = g_value_get_int (value);
580 break;
581 #endif
582 case PROP_IDCT_METHOD:
583 jpegenc->idct_method = g_value_get_enum (value);
584 break;
585 case PROP_SNAPSHOT:
586 jpegenc->snapshot = g_value_get_boolean (value);
587 break;
588 default:
589 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
590 break;
591 }
592
593 GST_OBJECT_UNLOCK (jpegenc);
594 }
595
596 static void
gst_jpegenc_get_property(GObject * object,guint prop_id,GValue * value,GParamSpec * pspec)597 gst_jpegenc_get_property (GObject * object, guint prop_id, GValue * value,
598 GParamSpec * pspec)
599 {
600 GstJpegEnc *jpegenc = GST_JPEGENC (object);
601
602 GST_OBJECT_LOCK (jpegenc);
603
604 switch (prop_id) {
605 case PROP_QUALITY:
606 g_value_set_int (value, jpegenc->quality);
607 break;
608 #ifdef ENABLE_SMOOTHING
609 case PROP_SMOOTHING:
610 g_value_set_int (value, jpegenc->smoothing);
611 break;
612 #endif
613 case PROP_IDCT_METHOD:
614 g_value_set_enum (value, jpegenc->idct_method);
615 break;
616 case PROP_SNAPSHOT:
617 g_value_set_boolean (value, jpegenc->snapshot);
618 break;
619 default:
620 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
621 break;
622 }
623
624 GST_OBJECT_UNLOCK (jpegenc);
625 }
626
627 static gboolean
gst_jpegenc_start(GstVideoEncoder * benc)628 gst_jpegenc_start (GstVideoEncoder * benc)
629 {
630 GstJpegEnc *enc = (GstJpegEnc *) benc;
631
632 enc->line[0] = NULL;
633 enc->line[1] = NULL;
634 enc->line[2] = NULL;
635 enc->sof_marker = -1;
636
637 return TRUE;
638 }
639
640 static gboolean
gst_jpegenc_stop(GstVideoEncoder * benc)641 gst_jpegenc_stop (GstVideoEncoder * benc)
642 {
643 GstJpegEnc *enc = (GstJpegEnc *) benc;
644 gint i, j;
645
646 g_free (enc->line[0]);
647 g_free (enc->line[1]);
648 g_free (enc->line[2]);
649 enc->line[0] = NULL;
650 enc->line[1] = NULL;
651 enc->line[2] = NULL;
652 for (i = 0; i < 3; i++) {
653 for (j = 0; j < 4 * DCTSIZE; j++) {
654 g_free (enc->row[i][j]);
655 enc->row[i][j] = NULL;
656 }
657 }
658
659 return TRUE;
660 }
661