2 * Copyright (C) 2014 Collabora Ltd.
3 * Author: Nicolas Dufresne <nicolas.dufresne@collabora.com>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
32 #include "gstv4l2object.h"
33 #include "gstv4l2videodec.h"
36 #include <gst/gst-i18n-plugin.h>
38 GST_DEBUG_CATEGORY_STATIC (gst_v4l2_video_dec_debug);
39 #define GST_CAT_DEFAULT gst_v4l2_video_dec_debug
46 const gchar *longname;
47 const gchar *description;
48 } GstV4l2VideoDecCData;
56 #define gst_v4l2_video_dec_parent_class parent_class
57 G_DEFINE_ABSTRACT_TYPE (GstV4l2VideoDec, gst_v4l2_video_dec,
58 GST_TYPE_VIDEO_DECODER);
61 gst_v4l2_video_dec_set_property (GObject * object,
62 guint prop_id, const GValue * value, GParamSpec * pspec)
64 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (object);
67 case PROP_OUTPUT_IO_MODE:
68 gst_v4l2_object_set_property_helper (self->v4l2output, prop_id, value,
71 case PROP_CAPTURE_IO_MODE:
72 gst_v4l2_object_set_property_helper (self->v4l2capture, prop_id, value,
76 /* By default, only set on output */
78 if (!gst_v4l2_object_set_property_helper (self->v4l2output,
79 prop_id, value, pspec)) {
80 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
87 gst_v4l2_video_dec_get_property (GObject * object,
88 guint prop_id, GValue * value, GParamSpec * pspec)
90 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (object);
93 case PROP_OUTPUT_IO_MODE:
94 gst_v4l2_object_get_property_helper (self->v4l2output, prop_id, value,
97 case PROP_CAPTURE_IO_MODE:
98 gst_v4l2_object_get_property_helper (self->v4l2capture, prop_id, value,
102 /* By default read from output */
104 if (!gst_v4l2_object_get_property_helper (self->v4l2output,
105 prop_id, value, pspec)) {
106 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
113 gst_v4l2_video_dec_open (GstVideoDecoder * decoder)
115 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
118 GST_DEBUG_OBJECT (self, "Opening");
120 if (!gst_v4l2_object_open (self->v4l2output))
123 if (!gst_v4l2_object_open_shared (self->v4l2capture, self->v4l2output))
126 codec_caps = gst_pad_get_pad_template_caps (decoder->sinkpad);
127 self->probed_sinkcaps = gst_v4l2_object_probe_caps (self->v4l2output,
129 gst_caps_unref (codec_caps);
131 if (gst_caps_is_empty (self->probed_sinkcaps))
132 goto no_encoded_format;
134 self->probed_srccaps = gst_v4l2_object_probe_caps (self->v4l2capture,
135 gst_v4l2_object_get_raw_caps ());
137 if (gst_caps_is_empty (self->probed_srccaps))
143 GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
144 (_("Encoder on device %s has no supported input format"),
145 self->v4l2output->videodev), (NULL));
150 GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
151 (_("Encoder on device %s has no supported output format"),
152 self->v4l2output->videodev), (NULL));
156 if (GST_V4L2_IS_OPEN (self->v4l2output))
157 gst_v4l2_object_close (self->v4l2output);
159 if (GST_V4L2_IS_OPEN (self->v4l2capture))
160 gst_v4l2_object_close (self->v4l2capture);
162 gst_caps_replace (&self->probed_srccaps, NULL);
163 gst_caps_replace (&self->probed_sinkcaps, NULL);
169 gst_v4l2_video_dec_close (GstVideoDecoder * decoder)
171 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
173 GST_DEBUG_OBJECT (self, "Closing");
175 gst_v4l2_object_close (self->v4l2output);
176 gst_v4l2_object_close (self->v4l2capture);
177 gst_caps_replace (&self->probed_srccaps, NULL);
178 gst_caps_replace (&self->probed_sinkcaps, NULL);
184 gst_v4l2_video_dec_start (GstVideoDecoder * decoder)
186 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
188 GST_DEBUG_OBJECT (self, "Starting");
190 gst_v4l2_object_unlock (self->v4l2output);
191 g_atomic_int_set (&self->active, TRUE);
192 self->output_flow = GST_FLOW_OK;
198 gst_v4l2_video_dec_stop (GstVideoDecoder * decoder)
200 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
202 GST_DEBUG_OBJECT (self, "Stopping");
204 gst_v4l2_object_unlock (self->v4l2output);
205 gst_v4l2_object_unlock (self->v4l2capture);
207 /* Wait for capture thread to stop */
208 gst_pad_stop_task (decoder->srcpad);
210 GST_VIDEO_DECODER_STREAM_LOCK (decoder);
211 self->output_flow = GST_FLOW_OK;
212 GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
214 /* Should have been flushed already */
215 g_assert (g_atomic_int_get (&self->active) == FALSE);
217 gst_v4l2_object_stop (self->v4l2output);
218 gst_v4l2_object_stop (self->v4l2capture);
220 if (self->input_state) {
221 gst_video_codec_state_unref (self->input_state);
222 self->input_state = NULL;
225 GST_DEBUG_OBJECT (self, "Stopped");
231 gst_v4l2_video_dec_set_format (GstVideoDecoder * decoder,
232 GstVideoCodecState * state)
234 GstV4l2Error error = GST_V4L2_ERROR_INIT;
236 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
238 GST_DEBUG_OBJECT (self, "Setting format: %" GST_PTR_FORMAT, state->caps);
240 if (self->input_state) {
241 if (gst_v4l2_object_caps_equal (self->v4l2output, state->caps)) {
242 GST_DEBUG_OBJECT (self, "Compatible caps");
245 gst_video_codec_state_unref (self->input_state);
246 self->input_state = NULL;
248 /* FIXME we probably need to do more work if pools are active */
251 ret = gst_v4l2_object_set_format (self->v4l2output, state->caps, &error);
254 self->input_state = gst_video_codec_state_ref (state);
256 gst_v4l2_error (self, &error);
263 gst_v4l2_video_dec_flush (GstVideoDecoder * decoder)
265 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
267 GST_DEBUG_OBJECT (self, "Flushed");
269 /* Ensure the processing thread has stopped for the reverse playback
271 if (gst_pad_get_task_state (decoder->srcpad) == GST_TASK_STARTED) {
272 GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
274 gst_v4l2_object_unlock (self->v4l2output);
275 gst_v4l2_object_unlock (self->v4l2capture);
276 gst_pad_stop_task (decoder->srcpad);
277 GST_VIDEO_DECODER_STREAM_LOCK (decoder);
280 self->output_flow = GST_FLOW_OK;
282 gst_v4l2_object_unlock_stop (self->v4l2output);
283 gst_v4l2_object_unlock_stop (self->v4l2capture);
285 gst_v4l2_buffer_pool_flush (self->v4l2output->pool);
286 gst_v4l2_buffer_pool_flush (self->v4l2capture->pool);
292 gst_v4l2_video_dec_negotiate (GstVideoDecoder * decoder)
294 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
296 /* We don't allow renegotiation without carefull disabling the pool */
297 if (self->v4l2capture->pool &&
298 gst_buffer_pool_is_active (GST_BUFFER_POOL (self->v4l2capture->pool)))
301 return GST_VIDEO_DECODER_CLASS (parent_class)->negotiate (decoder);
305 gst_v4l2_decoder_cmd (GstV4l2Object * v4l2object, guint cmd, guint flags)
307 struct v4l2_decoder_cmd dcmd = { 0, };
309 GST_DEBUG_OBJECT (v4l2object->element,
310 "sending v4l2 decoder command %u with flags %u", cmd, flags);
312 if (!GST_V4L2_IS_OPEN (v4l2object))
317 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_DECODER_CMD, &dcmd) < 0)
323 if (errno == ENOTTY) {
324 GST_INFO_OBJECT (v4l2object->element,
325 "Failed to send decoder command %u with flags %u for '%s'. (%s)",
326 cmd, flags, v4l2object->videodev, g_strerror (errno));
328 GST_ERROR_OBJECT (v4l2object->element,
329 "Failed to send decoder command %u with flags %u for '%s'. (%s)",
330 cmd, flags, v4l2object->videodev, g_strerror (errno));
336 gst_v4l2_video_dec_finish (GstVideoDecoder * decoder)
338 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
339 GstFlowReturn ret = GST_FLOW_OK;
342 if (gst_pad_get_task_state (decoder->srcpad) != GST_TASK_STARTED)
345 GST_DEBUG_OBJECT (self, "Finishing decoding");
347 GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
349 if (gst_v4l2_decoder_cmd (self->v4l2output, V4L2_DEC_CMD_STOP, 0)) {
350 GstTask *task = decoder->srcpad->task;
352 /* If the decoder stop command succeeded, just wait until processing is
354 GST_OBJECT_LOCK (task);
355 while (GST_TASK_STATE (task) == GST_TASK_STARTED)
356 GST_TASK_WAIT (task);
357 GST_OBJECT_UNLOCK (task);
358 ret = GST_FLOW_FLUSHING;
360 /* otherwise keep queuing empty buffers until the processing thread has
361 * stopped, _pool_process() will return FLUSHING when that happened */
362 while (ret == GST_FLOW_OK) {
363 buffer = gst_buffer_new ();
365 gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL (self->
366 v4l2output->pool), &buffer);
367 gst_buffer_unref (buffer);
371 /* and ensure the processing thread has stopped in case another error
373 gst_v4l2_object_unlock (self->v4l2capture);
374 gst_pad_stop_task (decoder->srcpad);
375 GST_VIDEO_DECODER_STREAM_LOCK (decoder);
377 if (ret == GST_FLOW_FLUSHING)
378 ret = self->output_flow;
380 GST_DEBUG_OBJECT (decoder, "Done draining buffers");
386 static GstVideoCodecFrame *
387 gst_v4l2_video_dec_get_oldest_frame (GstVideoDecoder * decoder)
389 GstVideoCodecFrame *frame = NULL;
393 frames = gst_video_decoder_get_frames (decoder);
395 for (l = frames; l != NULL; l = l->next) {
396 GstVideoCodecFrame *f = l->data;
398 if (!frame || frame->pts > f->pts)
405 GST_LOG_OBJECT (decoder,
406 "Oldest frame is %d %" GST_TIME_FORMAT " and %d frames left",
407 frame->system_frame_number, GST_TIME_ARGS (frame->pts), count - 1);
408 gst_video_codec_frame_ref (frame);
411 g_list_free_full (frames, (GDestroyNotify) gst_video_codec_frame_unref);
417 gst_v4l2_video_dec_loop (GstVideoDecoder * decoder)
419 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
420 GstV4l2BufferPool *v4l2_pool = GST_V4L2_BUFFER_POOL (self->v4l2capture->pool);
422 GstVideoCodecFrame *frame;
423 GstBuffer *buffer = NULL;
426 GST_LOG_OBJECT (decoder, "Allocate output buffer");
428 self->output_flow = GST_FLOW_OK;
430 /* We cannot use the base class allotate helper since it taking the internal
431 * stream lock. we know that the acquire may need to poll until more frames
432 * comes in and holding this lock would prevent that.
434 pool = gst_video_decoder_get_buffer_pool (decoder);
436 /* Pool may be NULL if we started going to READY state */
438 ret = GST_FLOW_FLUSHING;
442 ret = gst_buffer_pool_acquire_buffer (pool, &buffer, NULL);
443 g_object_unref (pool);
445 if (ret != GST_FLOW_OK)
448 GST_LOG_OBJECT (decoder, "Process output buffer");
449 ret = gst_v4l2_buffer_pool_process (v4l2_pool, &buffer);
451 } while (ret == GST_V4L2_FLOW_CORRUPTED_BUFFER);
453 if (ret != GST_FLOW_OK)
456 frame = gst_v4l2_video_dec_get_oldest_frame (decoder);
459 frame->output_buffer = buffer;
461 ret = gst_video_decoder_finish_frame (decoder, frame);
463 if (ret != GST_FLOW_OK)
466 GST_WARNING_OBJECT (decoder, "Decoder is producing too many buffers");
467 gst_buffer_unref (buffer);
473 GST_DEBUG_OBJECT (decoder, "Leaving output thread: %s",
474 gst_flow_get_name (ret));
476 gst_buffer_replace (&buffer, NULL);
477 self->output_flow = ret;
478 gst_v4l2_object_unlock (self->v4l2output);
479 gst_pad_pause_task (decoder->srcpad);
483 gst_v4l2_video_remove_padding (GstCapsFeatures * features,
484 GstStructure * structure, gpointer user_data)
486 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (user_data);
487 GstVideoAlignment *align = &self->v4l2capture->align;
488 GstVideoInfo *info = &self->v4l2capture->info;
491 if (!gst_structure_get_int (structure, "width", &width))
494 if (!gst_structure_get_int (structure, "height", &height))
497 if (align->padding_left != 0 || align->padding_top != 0 ||
498 width != info->width + align->padding_right ||
499 height != info->height + align->padding_bottom)
502 gst_structure_set (structure,
503 "width", G_TYPE_INT, width - align->padding_right,
504 "height", G_TYPE_INT, height - align->padding_bottom, NULL);
510 gst_v4l2_video_dec_handle_frame (GstVideoDecoder * decoder,
511 GstVideoCodecFrame * frame)
513 GstV4l2Error error = GST_V4L2_ERROR_INIT;
514 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
515 GstFlowReturn ret = GST_FLOW_OK;
516 gboolean processed = FALSE;
519 GST_DEBUG_OBJECT (self, "Handling frame %d", frame->system_frame_number);
521 if (G_UNLIKELY (!g_atomic_int_get (&self->active)))
524 if (G_UNLIKELY (!GST_V4L2_IS_ACTIVE (self->v4l2output))) {
525 if (!self->input_state)
527 if (!gst_v4l2_object_set_format (self->v4l2output, self->input_state->caps,
532 if (G_UNLIKELY (!GST_V4L2_IS_ACTIVE (self->v4l2capture))) {
533 GstBufferPool *pool = GST_BUFFER_POOL (self->v4l2output->pool);
535 GstVideoCodecState *output_state;
536 GstBuffer *codec_data;
537 GstCaps *acquired_caps, *available_caps, *caps, *filter;
540 GST_DEBUG_OBJECT (self, "Sending header");
542 codec_data = self->input_state->codec_data;
544 /* We are running in byte-stream mode, so we don't know the headers, but
545 * we need to send something, otherwise the decoder will refuse to
549 gst_buffer_ref (codec_data);
551 codec_data = gst_buffer_ref (frame->input_buffer);
555 /* Ensure input internal pool is active */
556 if (!gst_buffer_pool_is_active (pool)) {
557 GstStructure *config = gst_buffer_pool_get_config (pool);
558 gst_buffer_pool_config_set_params (config, self->input_state->caps,
559 self->v4l2output->info.size, 2, 2);
561 /* There is no reason to refuse this config */
562 if (!gst_buffer_pool_set_config (pool, config))
563 goto activate_failed;
565 if (!gst_buffer_pool_set_active (pool, TRUE))
566 goto activate_failed;
569 GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
571 gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL (self->
572 v4l2output->pool), &codec_data);
573 GST_VIDEO_DECODER_STREAM_LOCK (decoder);
575 gst_buffer_unref (codec_data);
577 /* For decoders G_FMT returns coded size, G_SELECTION returns visible size
578 * in the compose rectangle. gst_v4l2_object_acquire_format() checks both
579 * and returns the visible size as with/height and the coded size as
581 if (!gst_v4l2_object_acquire_format (self->v4l2capture, &info))
584 /* Create caps from the acquired format, remove the format field */
585 acquired_caps = gst_video_info_to_caps (&info);
586 GST_DEBUG_OBJECT (self, "Acquired caps: %" GST_PTR_FORMAT, acquired_caps);
587 st = gst_caps_get_structure (acquired_caps, 0);
588 gst_structure_remove_field (st, "format");
590 /* Probe currently available pixel formats */
591 available_caps = gst_v4l2_object_probe_caps (self->v4l2capture, NULL);
592 available_caps = gst_caps_make_writable (available_caps);
593 GST_DEBUG_OBJECT (self, "Available caps: %" GST_PTR_FORMAT, available_caps);
595 /* Replace coded size with visible size, we want to negotiate visible size
596 * with downstream, not coded size. */
597 gst_caps_map_in_place (available_caps, gst_v4l2_video_remove_padding, self);
599 filter = gst_caps_intersect_full (available_caps, acquired_caps,
600 GST_CAPS_INTERSECT_FIRST);
601 GST_DEBUG_OBJECT (self, "Filtered caps: %" GST_PTR_FORMAT, filter);
602 gst_caps_unref (acquired_caps);
603 gst_caps_unref (available_caps);
604 caps = gst_pad_peer_query_caps (decoder->srcpad, filter);
605 gst_caps_unref (filter);
607 GST_DEBUG_OBJECT (self, "Possible decoded caps: %" GST_PTR_FORMAT, caps);
608 if (gst_caps_is_empty (caps)) {
609 gst_caps_unref (caps);
613 /* Fixate pixel format */
614 caps = gst_caps_fixate (caps);
616 GST_DEBUG_OBJECT (self, "Chosen decoded caps: %" GST_PTR_FORMAT, caps);
618 /* Try to set negotiated format, on success replace acquired format */
619 if (gst_v4l2_object_set_format (self->v4l2capture, caps, &error))
620 gst_video_info_from_caps (&info, caps);
622 gst_v4l2_clear_error (&error);
623 gst_caps_unref (caps);
625 output_state = gst_video_decoder_set_output_state (decoder,
626 info.finfo->format, info.width, info.height, self->input_state);
628 /* Copy the rest of the information, there might be more in the future */
629 output_state->info.interlace_mode = info.interlace_mode;
630 gst_video_codec_state_unref (output_state);
632 if (!gst_video_decoder_negotiate (decoder)) {
633 if (GST_PAD_IS_FLUSHING (decoder->srcpad))
639 /* Ensure our internal pool is activated */
640 if (!gst_buffer_pool_set_active (GST_BUFFER_POOL (self->v4l2capture->pool),
642 goto activate_failed;
645 if (gst_pad_get_task_state (GST_VIDEO_DECODER_SRC_PAD (self)) ==
647 /* It's possible that the processing thread stopped due to an error */
648 if (self->output_flow != GST_FLOW_OK &&
649 self->output_flow != GST_FLOW_FLUSHING) {
650 GST_DEBUG_OBJECT (self, "Processing loop stopped with error, leaving");
651 ret = self->output_flow;
655 GST_DEBUG_OBJECT (self, "Starting decoding thread");
657 /* Start the processing task, when it quits, the task will disable input
658 * processing to unlock input if draining, or prevent potential block */
659 self->output_flow = GST_FLOW_FLUSHING;
660 if (!gst_pad_start_task (decoder->srcpad,
661 (GstTaskFunction) gst_v4l2_video_dec_loop, self, NULL))
662 goto start_task_failed;
666 GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
668 gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL (self->v4l2output->
669 pool), &frame->input_buffer);
670 GST_VIDEO_DECODER_STREAM_LOCK (decoder);
672 if (ret == GST_FLOW_FLUSHING) {
673 if (gst_pad_get_task_state (GST_VIDEO_DECODER_SRC_PAD (self)) !=
675 ret = self->output_flow;
677 } else if (ret != GST_FLOW_OK) {
682 /* No need to keep input arround */
683 tmp = frame->input_buffer;
684 frame->input_buffer = gst_buffer_new ();
685 gst_buffer_copy_into (frame->input_buffer, tmp,
686 GST_BUFFER_COPY_FLAGS | GST_BUFFER_COPY_TIMESTAMPS |
687 GST_BUFFER_COPY_META, 0, 0);
688 gst_buffer_unref (tmp);
690 gst_video_codec_frame_unref (frame);
696 GST_ERROR_OBJECT (self, "not negotiated");
697 ret = GST_FLOW_NOT_NEGOTIATED;
698 gst_v4l2_error (self, &error);
703 GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
704 (_("Failed to allocate required memory.")),
705 ("Buffer pool activation failed"));
706 ret = GST_FLOW_ERROR;
711 ret = GST_FLOW_FLUSHING;
717 GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
718 (_("Failed to start decoding thread.")), (NULL));
719 ret = GST_FLOW_ERROR;
724 GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
725 (_("Failed to process frame.")),
726 ("Maybe be due to not enough memory or failing driver"));
727 ret = GST_FLOW_ERROR;
732 gst_video_decoder_drop_frame (decoder, frame);
738 gst_v4l2_video_dec_decide_allocation (GstVideoDecoder * decoder,
741 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
742 GstClockTime latency;
743 gboolean ret = FALSE;
745 if (gst_v4l2_object_decide_allocation (self->v4l2capture, query))
746 ret = GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation (decoder,
749 if (GST_CLOCK_TIME_IS_VALID (self->v4l2capture->duration)) {
750 latency = self->v4l2capture->min_buffers * self->v4l2capture->duration;
751 GST_DEBUG_OBJECT (self, "Setting latency: %" GST_TIME_FORMAT " (%"
752 G_GUINT32_FORMAT " * %" G_GUINT64_FORMAT, GST_TIME_ARGS (latency),
753 self->v4l2capture->min_buffers, self->v4l2capture->duration);
754 gst_video_decoder_set_latency (decoder, latency, latency);
756 GST_WARNING_OBJECT (self, "Duration invalid, not setting latency");
763 gst_v4l2_video_dec_src_query (GstVideoDecoder * decoder, GstQuery * query)
766 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
768 switch (GST_QUERY_TYPE (query)) {
769 case GST_QUERY_CAPS:{
770 GstCaps *filter, *result = NULL;
771 GstPad *pad = GST_VIDEO_DECODER_SRC_PAD (decoder);
773 gst_query_parse_caps (query, &filter);
775 if (self->probed_srccaps)
776 result = gst_caps_ref (self->probed_srccaps);
778 result = gst_pad_get_pad_template_caps (pad);
781 GstCaps *tmp = result;
783 gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
784 gst_caps_unref (tmp);
787 GST_DEBUG_OBJECT (self, "Returning src caps %" GST_PTR_FORMAT, result);
789 gst_query_set_caps_result (query, result);
790 gst_caps_unref (result);
795 ret = GST_VIDEO_DECODER_CLASS (parent_class)->src_query (decoder, query);
803 gst_v4l2_video_dec_sink_getcaps (GstVideoDecoder * decoder, GstCaps * filter)
805 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
808 result = gst_video_decoder_proxy_getcaps (decoder, self->probed_sinkcaps,
811 GST_DEBUG_OBJECT (self, "Returning sink caps %" GST_PTR_FORMAT, result);
817 gst_v4l2_video_dec_sink_event (GstVideoDecoder * decoder, GstEvent * event)
819 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
822 switch (GST_EVENT_TYPE (event)) {
823 case GST_EVENT_FLUSH_START:
824 GST_DEBUG_OBJECT (self, "flush start");
825 gst_v4l2_object_unlock (self->v4l2output);
826 gst_v4l2_object_unlock (self->v4l2capture);
832 ret = GST_VIDEO_DECODER_CLASS (parent_class)->sink_event (decoder, event);
834 switch (GST_EVENT_TYPE (event)) {
835 case GST_EVENT_FLUSH_START:
836 /* The processing thread should stop now, wait for it */
837 gst_pad_stop_task (decoder->srcpad);
838 GST_DEBUG_OBJECT (self, "flush start done");
847 static GstStateChangeReturn
848 gst_v4l2_video_dec_change_state (GstElement * element,
849 GstStateChange transition)
851 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (element);
852 GstVideoDecoder *decoder = GST_VIDEO_DECODER (element);
854 if (transition == GST_STATE_CHANGE_PAUSED_TO_READY) {
855 g_atomic_int_set (&self->active, FALSE);
856 gst_v4l2_object_unlock (self->v4l2output);
857 gst_v4l2_object_unlock (self->v4l2capture);
858 gst_pad_stop_task (decoder->srcpad);
861 return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
865 gst_v4l2_video_dec_dispose (GObject * object)
867 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (object);
869 gst_caps_replace (&self->probed_sinkcaps, NULL);
870 gst_caps_replace (&self->probed_srccaps, NULL);
872 G_OBJECT_CLASS (parent_class)->dispose (object);
876 gst_v4l2_video_dec_finalize (GObject * object)
878 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (object);
880 gst_v4l2_object_destroy (self->v4l2capture);
881 gst_v4l2_object_destroy (self->v4l2output);
883 G_OBJECT_CLASS (parent_class)->finalize (object);
887 gst_v4l2_video_dec_init (GstV4l2VideoDec * self)
889 /* V4L2 object are created in subinstance_init */
893 gst_v4l2_video_dec_subinstance_init (GTypeInstance * instance, gpointer g_class)
895 GstV4l2VideoDecClass *klass = GST_V4L2_VIDEO_DEC_CLASS (g_class);
896 GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (instance);
897 GstVideoDecoder *decoder = GST_VIDEO_DECODER (instance);
899 gst_video_decoder_set_packetized (decoder, TRUE);
901 self->v4l2output = gst_v4l2_object_new (GST_ELEMENT (self),
902 V4L2_BUF_TYPE_VIDEO_OUTPUT, klass->default_device,
903 gst_v4l2_get_output, gst_v4l2_set_output, NULL);
904 self->v4l2output->no_initial_format = TRUE;
905 self->v4l2output->keep_aspect = FALSE;
907 self->v4l2capture = gst_v4l2_object_new (GST_ELEMENT (self),
908 V4L2_BUF_TYPE_VIDEO_CAPTURE, klass->default_device,
909 gst_v4l2_get_input, gst_v4l2_set_input, NULL);
910 self->v4l2capture->no_initial_format = TRUE;
911 self->v4l2output->keep_aspect = FALSE;
915 gst_v4l2_video_dec_class_init (GstV4l2VideoDecClass * klass)
917 GstElementClass *element_class;
918 GObjectClass *gobject_class;
919 GstVideoDecoderClass *video_decoder_class;
921 parent_class = g_type_class_peek_parent (klass);
923 element_class = (GstElementClass *) klass;
924 gobject_class = (GObjectClass *) klass;
925 video_decoder_class = (GstVideoDecoderClass *) klass;
927 GST_DEBUG_CATEGORY_INIT (gst_v4l2_video_dec_debug, "v4l2videodec", 0,
928 "V4L2 Video Decoder");
930 gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_dispose);
931 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_finalize);
932 gobject_class->set_property =
933 GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_set_property);
934 gobject_class->get_property =
935 GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_get_property);
937 video_decoder_class->open = GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_open);
938 video_decoder_class->close = GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_close);
939 video_decoder_class->start = GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_start);
940 video_decoder_class->stop = GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_stop);
941 video_decoder_class->finish = GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_finish);
942 video_decoder_class->flush = GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_flush);
943 video_decoder_class->set_format =
944 GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_set_format);
945 video_decoder_class->negotiate =
946 GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_negotiate);
947 video_decoder_class->decide_allocation =
948 GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_decide_allocation);
949 /* FIXME propose_allocation or not ? */
950 video_decoder_class->handle_frame =
951 GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_handle_frame);
952 video_decoder_class->getcaps =
953 GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_sink_getcaps);
954 video_decoder_class->src_query =
955 GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_src_query);
956 video_decoder_class->sink_event =
957 GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_sink_event);
959 element_class->change_state =
960 GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_change_state);
962 gst_v4l2_object_install_m2m_properties_helper (gobject_class);
966 gst_v4l2_video_dec_subclass_init (gpointer g_class, gpointer data)
968 GstV4l2VideoDecClass *klass = GST_V4L2_VIDEO_DEC_CLASS (g_class);
969 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
970 GstV4l2VideoDecCData *cdata = data;
972 klass->default_device = cdata->device;
974 /* Note: gst_pad_template_new() take the floating ref from the caps */
975 gst_element_class_add_pad_template (element_class,
976 gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
978 gst_element_class_add_pad_template (element_class,
979 gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
982 gst_element_class_set_static_metadata (element_class, cdata->longname,
983 "Codec/Decoder/Video", cdata->description,
984 "Nicolas Dufresne <nicolas.dufresne@collabora.com>");
989 /* Probing functions */
991 gst_v4l2_is_video_dec (GstCaps * sink_caps, GstCaps * src_caps)
993 gboolean ret = FALSE;
995 if (gst_caps_is_subset (sink_caps, gst_v4l2_object_get_codec_caps ())
996 && gst_caps_is_subset (src_caps, gst_v4l2_object_get_raw_caps ()))
1003 gst_v4l2_video_dec_set_metadata (GstStructure * s, GstV4l2VideoDecCData * cdata,
1004 const gchar * basename)
1006 gchar *codec_name = NULL;
1007 gchar *type_name = NULL;
1009 #define SET_META(codec) \
1011 cdata->longname = "V4L2 " codec " Decoder"; \
1012 cdata->description = "Decodes " codec " streams via V4L2 API"; \
1013 codec_name = g_ascii_strdown (codec, -1); \
1016 if (gst_structure_has_name (s, "image/jpeg")) {
1018 } else if (gst_structure_has_name (s, "video/mpeg")) {
1019 gint mpegversion = 0;
1020 gst_structure_get_int (s, "mpegversion", &mpegversion);
1022 if (mpegversion == 2) {
1027 } else if (gst_structure_has_name (s, "video/x-h263")) {
1029 } else if (gst_structure_has_name (s, "video/x-h264")) {
1031 } else if (gst_structure_has_name (s, "video/x-wmv")) {
1033 } else if (gst_structure_has_name (s, "video/x-vp8")) {
1035 } else if (gst_structure_has_name (s, "video/x-vp9")) {
1037 } else if (gst_structure_has_name (s, "video/x-bayer")) {
1039 } else if (gst_structure_has_name (s, "video/x-sonix")) {
1041 } else if (gst_structure_has_name (s, "video/x-pwc1")) {
1043 } else if (gst_structure_has_name (s, "video/x-pwc2")) {
1046 /* This code should be kept on sync with the exposed CODEC type of format
1047 * from gstv4l2object.c. This warning will only occure in case we forget
1048 * to also add a format here. */
1049 gchar *s_str = gst_structure_to_string (s);
1050 g_warning ("Missing fixed name mapping for caps '%s', this is a GStreamer "
1051 "bug, please report at https://bugs.gnome.org", s_str);
1056 type_name = g_strdup_printf ("v4l2%sdec", codec_name);
1057 if (g_type_from_name (type_name) != 0) {
1059 type_name = g_strdup_printf ("v4l2%s%sdec", basename, codec_name);
1068 gst_v4l2_video_dec_register (GstPlugin * plugin, const gchar * basename,
1069 const gchar * device_path, GstCaps * sink_caps, GstCaps * src_caps)
1073 for (i = 0; i < gst_caps_get_size (sink_caps); i++) {
1074 GstV4l2VideoDecCData *cdata;
1076 GTypeQuery type_query;
1077 GTypeInfo type_info = { 0, };
1078 GType type, subtype;
1081 s = gst_caps_get_structure (sink_caps, i);
1083 cdata = g_new0 (GstV4l2VideoDecCData, 1);
1084 cdata->device = g_strdup (device_path);
1085 cdata->sink_caps = gst_caps_new_empty ();
1086 gst_caps_append_structure (cdata->sink_caps, gst_structure_copy (s));
1087 cdata->src_caps = gst_caps_ref (src_caps);
1088 type_name = gst_v4l2_video_dec_set_metadata (s, cdata, basename);
1090 /* Skip over if we hit an unmapped type */
1096 type = gst_v4l2_video_dec_get_type ();
1097 g_type_query (type, &type_query);
1098 memset (&type_info, 0, sizeof (type_info));
1099 type_info.class_size = type_query.class_size;
1100 type_info.instance_size = type_query.instance_size;
1101 type_info.class_init = gst_v4l2_video_dec_subclass_init;
1102 type_info.class_data = cdata;
1103 type_info.instance_init = gst_v4l2_video_dec_subinstance_init;
1105 subtype = g_type_register_static (type, type_name, &type_info, 0);
1106 if (!gst_element_register (plugin, type_name, GST_RANK_PRIMARY + 1,
1108 GST_WARNING ("Failed to register plugin '%s'", type_name);