2 * Copyright (C) 2014-2017 SUMOMO Computer Association
3 * Authors Ayaka <ayaka@soulik.info>
4 * Copyright (C) 2017 Collabora Ltd.
5 * Author: Nicolas Dufresne <nicolas.dufresne@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.
34 #include "gstv4l2object.h"
35 #include "gstv4l2videoenc.h"
38 #include <gst/gst-i18n-plugin.h>
40 GST_DEBUG_CATEGORY_STATIC (gst_v4l2_video_enc_debug);
41 #define GST_CAT_DEFAULT gst_v4l2_video_enc_debug
48 } GstV4l2VideoEncCData;
53 V4L2_STD_OBJECT_PROPS,
56 #define gst_v4l2_video_enc_parent_class parent_class
57 G_DEFINE_ABSTRACT_TYPE (GstV4l2VideoEnc, gst_v4l2_video_enc,
58 GST_TYPE_VIDEO_ENCODER);
61 gst_v4l2_video_enc_set_property (GObject * object,
62 guint prop_id, const GValue * value, GParamSpec * pspec)
64 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (object);
67 case PROP_CAPTURE_IO_MODE:
68 if (!gst_v4l2_object_set_property_helper (self->v4l2capture,
69 prop_id, value, pspec)) {
70 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
74 /* By default, only set on output */
76 if (!gst_v4l2_object_set_property_helper (self->v4l2output,
77 prop_id, value, pspec)) {
78 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
85 gst_v4l2_video_enc_get_property (GObject * object,
86 guint prop_id, GValue * value, GParamSpec * pspec)
88 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (object);
91 case PROP_CAPTURE_IO_MODE:
92 if (!gst_v4l2_object_get_property_helper (self->v4l2capture,
93 prop_id, value, pspec)) {
94 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
98 /* By default read from output */
100 if (!gst_v4l2_object_get_property_helper (self->v4l2output,
101 prop_id, value, pspec)) {
102 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
109 gst_v4l2_video_enc_open (GstVideoEncoder * encoder)
111 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
114 GST_DEBUG_OBJECT (self, "Opening");
116 if (!gst_v4l2_object_open (self->v4l2output))
119 if (!gst_v4l2_object_open_shared (self->v4l2capture, self->v4l2output))
122 self->probed_sinkcaps = gst_v4l2_object_probe_caps (self->v4l2output,
123 gst_v4l2_object_get_raw_caps ());
125 if (gst_caps_is_empty (self->probed_sinkcaps))
128 codec_caps = gst_pad_get_pad_template_caps (encoder->srcpad);
129 self->probed_srccaps = gst_v4l2_object_probe_caps (self->v4l2capture,
131 gst_caps_unref (codec_caps);
133 if (gst_caps_is_empty (self->probed_srccaps))
134 goto no_encoded_format;
139 GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
140 (_("Encoder on device %s has no supported output format"),
141 self->v4l2output->videodev), (NULL));
146 GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
147 (_("Encoder on device %s has no supported input format"),
148 self->v4l2output->videodev), (NULL));
152 if (GST_V4L2_IS_OPEN (self->v4l2output))
153 gst_v4l2_object_close (self->v4l2output);
155 if (GST_V4L2_IS_OPEN (self->v4l2capture))
156 gst_v4l2_object_close (self->v4l2capture);
158 gst_caps_replace (&self->probed_srccaps, NULL);
159 gst_caps_replace (&self->probed_sinkcaps, NULL);
165 gst_v4l2_video_enc_close (GstVideoEncoder * encoder)
167 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
169 GST_DEBUG_OBJECT (self, "Closing");
171 gst_v4l2_object_close (self->v4l2output);
172 gst_v4l2_object_close (self->v4l2capture);
173 gst_caps_replace (&self->probed_srccaps, NULL);
174 gst_caps_replace (&self->probed_sinkcaps, NULL);
180 gst_v4l2_video_enc_start (GstVideoEncoder * encoder)
182 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
184 GST_DEBUG_OBJECT (self, "Starting");
186 gst_v4l2_object_unlock (self->v4l2output);
187 g_atomic_int_set (&self->active, TRUE);
188 self->output_flow = GST_FLOW_OK;
194 gst_v4l2_video_enc_stop (GstVideoEncoder * encoder)
196 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
198 GST_DEBUG_OBJECT (self, "Stopping");
200 gst_v4l2_object_unlock (self->v4l2output);
201 gst_v4l2_object_unlock (self->v4l2capture);
203 /* Wait for capture thread to stop */
204 gst_pad_stop_task (encoder->srcpad);
206 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
207 self->output_flow = GST_FLOW_OK;
208 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
210 /* Should have been flushed already */
211 g_assert (g_atomic_int_get (&self->active) == FALSE);
212 g_assert (g_atomic_int_get (&self->processing) == FALSE);
214 gst_v4l2_object_stop (self->v4l2output);
215 gst_v4l2_object_stop (self->v4l2capture);
217 if (self->input_state) {
218 gst_video_codec_state_unref (self->input_state);
219 self->input_state = NULL;
222 GST_DEBUG_OBJECT (self, "Stopped");
228 gst_v4l2_encoder_cmd (GstV4l2Object * v4l2object, guint cmd, guint flags)
230 struct v4l2_encoder_cmd ecmd = { 0, };
232 GST_DEBUG_OBJECT (v4l2object->element,
233 "sending v4l2 encoder command %u with flags %u", cmd, flags);
235 if (!GST_V4L2_IS_OPEN (v4l2object))
240 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_ENCODER_CMD, &ecmd) < 0)
246 if (errno == ENOTTY) {
247 GST_INFO_OBJECT (v4l2object->element,
248 "Failed to send encoder command %u with flags %u for '%s'. (%s)",
249 cmd, flags, v4l2object->videodev, g_strerror (errno));
251 GST_ERROR_OBJECT (v4l2object->element,
252 "Failed to send encoder command %u with flags %u for '%s'. (%s)",
253 cmd, flags, v4l2object->videodev, g_strerror (errno));
259 gst_v4l2_video_enc_finish (GstVideoEncoder * encoder)
261 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
262 GstFlowReturn ret = GST_FLOW_OK;
264 if (gst_pad_get_task_state (encoder->srcpad) != GST_TASK_STARTED)
267 GST_DEBUG_OBJECT (self, "Finishing encoding");
269 /* drop the stream lock while draining, so remaining buffers can be
270 * pushed from the src pad task thread */
271 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
273 if (gst_v4l2_encoder_cmd (self->v4l2capture, V4L2_ENC_CMD_STOP, 0)) {
274 GstTask *task = encoder->srcpad->task;
276 /* Wait for the task to be drained */
277 GST_DEBUG_OBJECT (self, "Waiting for encoder stop");
278 GST_OBJECT_LOCK (task);
279 while (GST_TASK_STATE (task) == GST_TASK_STARTED)
280 GST_TASK_WAIT (task);
281 GST_OBJECT_UNLOCK (task);
282 ret = GST_FLOW_FLUSHING;
285 /* and ensure the processing thread has stopped in case another error
287 gst_v4l2_object_unlock (self->v4l2capture);
288 gst_pad_stop_task (encoder->srcpad);
289 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
291 if (ret == GST_FLOW_FLUSHING)
292 ret = self->output_flow;
294 GST_DEBUG_OBJECT (encoder, "Done draining buffers");
301 gst_v4l2_video_enc_set_format (GstVideoEncoder * encoder,
302 GstVideoCodecState * state)
305 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
306 GstV4l2Error error = GST_V4L2_ERROR_INIT;
308 GstVideoCodecState *output;
310 GST_DEBUG_OBJECT (self, "Setting format: %" GST_PTR_FORMAT, state->caps);
312 if (self->input_state) {
313 if (gst_v4l2_object_caps_equal (self->v4l2output, state->caps)) {
314 GST_DEBUG_OBJECT (self, "Compatible caps");
318 if (gst_v4l2_video_enc_finish (encoder) != GST_FLOW_OK)
321 gst_v4l2_object_stop (self->v4l2output);
322 gst_v4l2_object_stop (self->v4l2capture);
324 gst_video_codec_state_unref (self->input_state);
325 self->input_state = NULL;
328 outcaps = gst_pad_get_pad_template_caps (encoder->srcpad);
329 outcaps = gst_caps_make_writable (outcaps);
330 output = gst_video_encoder_set_output_state (encoder, outcaps, state);
331 gst_video_codec_state_unref (output);
333 if (!gst_video_encoder_negotiate (encoder))
336 if (!gst_v4l2_object_set_format (self->v4l2output, state->caps, &error)) {
337 gst_v4l2_error (self, &error);
341 self->input_state = gst_video_codec_state_ref (state);
343 GST_DEBUG_OBJECT (self, "output caps: %" GST_PTR_FORMAT, state->caps);
349 gst_v4l2_video_enc_flush (GstVideoEncoder * encoder)
351 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
353 GST_DEBUG_OBJECT (self, "Flushing");
355 /* Ensure the processing thread has stopped for the reverse playback
357 if (g_atomic_int_get (&self->processing)) {
358 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
360 gst_v4l2_object_unlock_stop (self->v4l2output);
361 gst_v4l2_object_unlock_stop (self->v4l2capture);
362 gst_pad_stop_task (encoder->srcpad);
364 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
368 self->output_flow = GST_FLOW_OK;
370 gst_v4l2_object_unlock_stop (self->v4l2output);
371 gst_v4l2_object_unlock_stop (self->v4l2capture);
376 struct ProfileLevelCtx
378 GstV4l2VideoEnc *self;
379 const gchar *profile;
384 get_string_list (GstStructure * s, const gchar * field, GQueue * queue)
388 value = gst_structure_get_value (s, field);
393 if (GST_VALUE_HOLDS_LIST (value)) {
396 if (gst_value_list_get_size (value) == 0)
399 for (i = 0; i < gst_value_list_get_size (value); i++) {
400 const GValue *item = gst_value_list_get_value (value, i);
402 if (G_VALUE_HOLDS_STRING (item))
403 g_queue_push_tail (queue, g_value_dup_string (item));
405 } else if (G_VALUE_HOLDS_STRING (value)) {
406 g_queue_push_tail (queue, g_value_dup_string (value));
413 negotiate_profile_and_level (GstCapsFeatures * features, GstStructure * s,
416 struct ProfileLevelCtx *ctx = user_data;
417 GstV4l2VideoEncClass *klass = GST_V4L2_VIDEO_ENC_GET_CLASS (ctx->self);
418 GstV4l2Object *v4l2object = GST_V4L2_VIDEO_ENC (ctx->self)->v4l2output;
419 GQueue profiles = G_QUEUE_INIT;
420 GQueue levels = G_QUEUE_INIT;
421 gboolean failed = FALSE;
423 if (klass->profile_cid && get_string_list (s, "profile", &profiles)) {
426 for (l = profiles.head; l; l = l->next) {
427 struct v4l2_control control = { 0, };
429 const gchar *profile = l->data;
431 GST_TRACE_OBJECT (ctx->self, "Trying profile %s", profile);
433 control.id = klass->profile_cid;
434 control.value = v4l2_profile = klass->profile_from_string (profile);
436 if (control.value < 0)
439 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_S_CTRL, &control) < 0) {
440 GST_WARNING_OBJECT (ctx->self, "Failed to set %s profile: '%s'",
441 klass->codec_name, g_strerror (errno));
445 profile = klass->profile_to_string (control.value);
447 if (control.value == v4l2_profile) {
448 ctx->profile = profile;
452 if (g_list_find_custom (l, profile, g_str_equal)) {
453 ctx->profile = profile;
458 if (profiles.length && !ctx->profile)
461 g_queue_foreach (&profiles, (GFunc) g_free, NULL);
462 g_queue_clear (&profiles);
465 if (!failed && klass->level_cid && get_string_list (s, "level", &levels)) {
468 for (l = levels.head; l; l = l->next) {
469 struct v4l2_control control = { 0, };
471 const gchar *level = l->data;
473 GST_TRACE_OBJECT (ctx->self, "Trying level %s", level);
475 control.id = klass->level_cid;
476 control.value = v4l2_level = klass->level_from_string (level);
478 if (control.value < 0)
481 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_S_CTRL, &control) < 0) {
482 GST_WARNING_OBJECT (ctx->self, "Failed to set %s level: '%s'",
483 klass->codec_name, g_strerror (errno));
487 level = klass->level_to_string (control.value);
489 if (control.value == v4l2_level) {
494 if (g_list_find_custom (l, level, g_str_equal)) {
500 if (levels.length && !ctx->level)
503 g_queue_foreach (&levels, (GFunc) g_free, NULL);
504 g_queue_clear (&levels);
507 /* If it failed, we continue */
512 gst_v4l2_video_enc_negotiate (GstVideoEncoder * encoder)
514 GstV4l2VideoEncClass *klass = GST_V4L2_VIDEO_ENC_GET_CLASS (encoder);
515 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
516 GstV4l2Object *v4l2object = self->v4l2output;
517 GstCaps *allowed_caps;
518 struct ProfileLevelCtx ctx = { self, NULL, NULL };
519 GstVideoCodecState *state;
522 GST_DEBUG_OBJECT (self, "Negotiating %s profile and level.",
525 /* Only renegotiate on upstream changes */
526 if (self->input_state)
529 allowed_caps = gst_pad_get_allowed_caps (GST_VIDEO_ENCODER_SRC_PAD (encoder));
533 if (gst_caps_is_empty (allowed_caps))
536 allowed_caps = gst_caps_make_writable (allowed_caps);
538 /* negotiate_profile_and_level() will return TRUE on failure to keep
539 * iterating, if gst_caps_foreach() returns TRUE it means there was no
540 * compatible profile and level in any of the structure */
541 if (gst_caps_foreach (allowed_caps, negotiate_profile_and_level, &ctx)) {
542 goto no_profile_level;
546 if (klass->profile_cid && !ctx.profile) {
547 struct v4l2_control control = { 0, };
549 control.id = klass->profile_cid;
551 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CTRL, &control) < 0)
554 ctx.profile = klass->profile_to_string (control.value);
557 if (klass->level_cid && !ctx.level) {
558 struct v4l2_control control = { 0, };
560 control.id = klass->level_cid;
562 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CTRL, &control) < 0)
565 ctx.level = klass->level_to_string (control.value);
568 GST_DEBUG_OBJECT (self, "Selected %s profile %s at level %s",
569 klass->codec_name, ctx.profile, ctx.level);
571 state = gst_video_encoder_get_output_state (encoder);
572 s = gst_caps_get_structure (state->caps, 0);
574 if (klass->profile_cid)
575 gst_structure_set (s, "profile", G_TYPE_STRING, ctx.profile, NULL);
577 if (klass->level_cid)
578 gst_structure_set (s, "level", G_TYPE_STRING, ctx.level, NULL);
580 if (!GST_VIDEO_ENCODER_CLASS (parent_class)->negotiate (encoder))
586 GST_WARNING_OBJECT (self, "Failed to get %s profile and level: '%s'",
587 klass->codec_name, g_strerror (errno));
591 GST_WARNING_OBJECT (self, "No compatible level and profile in caps: %"
592 GST_PTR_FORMAT, allowed_caps);
597 gst_caps_unref (allowed_caps);
601 static GstVideoCodecFrame *
602 gst_v4l2_video_enc_get_oldest_frame (GstVideoEncoder * encoder)
604 GstVideoCodecFrame *frame = NULL;
608 frames = gst_video_encoder_get_frames (encoder);
610 for (l = frames; l != NULL; l = l->next) {
611 GstVideoCodecFrame *f = l->data;
613 if (!frame || frame->pts > f->pts)
620 GST_LOG_OBJECT (encoder,
621 "Oldest frame is %d %" GST_TIME_FORMAT
622 " and %d frames left",
623 frame->system_frame_number, GST_TIME_ARGS (frame->pts), count - 1);
624 gst_video_codec_frame_ref (frame);
627 g_list_free_full (frames, (GDestroyNotify) gst_video_codec_frame_unref);
633 gst_v4l2_video_enc_loop (GstVideoEncoder * encoder)
635 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
636 GstVideoCodecFrame *frame;
637 GstBuffer *buffer = NULL;
640 GST_LOG_OBJECT (encoder, "Allocate output buffer");
642 buffer = gst_video_encoder_allocate_output_buffer (encoder,
643 self->v4l2capture->info.size);
645 if (NULL == buffer) {
646 ret = GST_FLOW_FLUSHING;
651 /* FIXME Check if buffer isn't the last one here */
653 GST_LOG_OBJECT (encoder, "Process output buffer");
655 gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL
656 (self->v4l2capture->pool), &buffer);
658 if (ret != GST_FLOW_OK)
661 frame = gst_v4l2_video_enc_get_oldest_frame (encoder);
664 /* At this point, the delta unit buffer flag is already correctly set by
665 * gst_v4l2_buffer_pool_process. Since gst_video_encoder_finish_frame
666 * will overwrite it from GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT (frame),
669 if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT))
670 GST_VIDEO_CODEC_FRAME_UNSET_SYNC_POINT (frame);
672 GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT (frame);
673 frame->output_buffer = buffer;
675 ret = gst_video_encoder_finish_frame (encoder, frame);
677 if (ret != GST_FLOW_OK)
680 GST_WARNING_OBJECT (encoder, "Encoder is producing too many buffers");
681 gst_buffer_unref (buffer);
687 GST_DEBUG_OBJECT (encoder, "Leaving output thread");
689 gst_buffer_replace (&buffer, NULL);
690 self->output_flow = ret;
691 g_atomic_int_set (&self->processing, FALSE);
692 gst_v4l2_object_unlock (self->v4l2output);
693 gst_pad_pause_task (encoder->srcpad);
697 gst_v4l2_video_enc_loop_stopped (GstV4l2VideoEnc * self)
699 if (g_atomic_int_get (&self->processing)) {
700 GST_DEBUG_OBJECT (self, "Early stop of encoding thread");
701 self->output_flow = GST_FLOW_FLUSHING;
702 g_atomic_int_set (&self->processing, FALSE);
705 GST_DEBUG_OBJECT (self, "Encoding task destroyed: %s",
706 gst_flow_get_name (self->output_flow));
711 gst_v4l2_video_enc_handle_frame (GstVideoEncoder * encoder,
712 GstVideoCodecFrame * frame)
714 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
715 GstFlowReturn ret = GST_FLOW_OK;
716 GstTaskState task_state;
718 GST_DEBUG_OBJECT (self, "Handling frame %d", frame->system_frame_number);
720 if (G_UNLIKELY (!g_atomic_int_get (&self->active)))
723 task_state = gst_pad_get_task_state (GST_VIDEO_ENCODER_SRC_PAD (self));
724 if (task_state == GST_TASK_STOPPED || task_state == GST_TASK_PAUSED) {
725 GstBufferPool *pool = GST_BUFFER_POOL (self->v4l2output->pool);
727 /* It possible that the processing thread stopped due to an error */
728 if (self->output_flow != GST_FLOW_OK &&
729 self->output_flow != GST_FLOW_FLUSHING) {
730 GST_DEBUG_OBJECT (self, "Processing loop stopped with error, leaving");
731 ret = self->output_flow;
735 /* Ensure input internal pool is active */
736 if (!gst_buffer_pool_is_active (pool)) {
737 GstStructure *config = gst_buffer_pool_get_config (pool);
738 guint min = MAX (self->v4l2output->min_buffers, GST_V4L2_MIN_BUFFERS);
740 gst_buffer_pool_config_set_params (config, self->input_state->caps,
741 self->v4l2output->info.size, min, min);
743 /* There is no reason to refuse this config */
744 if (!gst_buffer_pool_set_config (pool, config))
745 goto activate_failed;
747 if (!gst_buffer_pool_set_active (pool, TRUE))
748 goto activate_failed;
751 if (!gst_buffer_pool_set_active
752 (GST_BUFFER_POOL (self->v4l2capture->pool), TRUE)) {
753 GST_WARNING_OBJECT (self, "Could not activate capture buffer pool.");
754 goto activate_failed;
757 GST_DEBUG_OBJECT (self, "Starting encoding thread");
759 /* Start the processing task, when it quits, the task will disable input
760 * processing to unlock input if draining, or prevent potential block */
761 if (!gst_pad_start_task (encoder->srcpad,
762 (GstTaskFunction) gst_v4l2_video_enc_loop, self,
763 (GDestroyNotify) gst_v4l2_video_enc_loop_stopped))
764 goto start_task_failed;
767 if (frame->input_buffer) {
768 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
770 gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL
771 (self->v4l2output->pool), &frame->input_buffer);
772 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
774 if (ret == GST_FLOW_FLUSHING) {
775 if (gst_pad_get_task_state (GST_VIDEO_DECODER_SRC_PAD (self)) !=
777 ret = self->output_flow;
779 } else if (ret != GST_FLOW_OK) {
784 gst_video_codec_frame_unref (frame);
790 GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
791 (_("Failed to allocate required memory.")),
792 ("Buffer pool activation failed"));
793 return GST_FLOW_ERROR;
798 ret = GST_FLOW_FLUSHING;
803 GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
804 (_("Failed to start encoding thread.")), (NULL));
805 g_atomic_int_set (&self->processing, FALSE);
806 ret = GST_FLOW_ERROR;
811 GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
812 (_("Failed to process frame.")),
813 ("Maybe be due to not enough memory or failing driver"));
814 ret = GST_FLOW_ERROR;
819 gst_video_encoder_finish_frame (encoder, frame);
825 gst_v4l2_video_enc_decide_allocation (GstVideoEncoder *
826 encoder, GstQuery * query)
828 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
829 GstVideoCodecState *state = gst_video_encoder_get_output_state (encoder);
831 GstV4l2Error error = GST_V4L2_ERROR_INIT;
832 GstClockTime latency;
833 gboolean ret = FALSE;
835 /* We need to set the format here, since this is called right after
836 * GstVideoEncoder have set the width, height and framerate into the state
837 * caps. These are needed by the driver to calculate the buffer size and to
838 * implement bitrate adaptation. */
839 caps = gst_caps_copy (state->caps);
840 gst_structure_remove_field (gst_caps_get_structure (caps, 0), "colorimetry");
841 if (!gst_v4l2_object_set_format (self->v4l2capture, caps, &error)) {
842 gst_v4l2_error (self, &error);
843 gst_caps_unref (caps);
847 gst_caps_unref (caps);
849 if (gst_v4l2_object_decide_allocation (self->v4l2capture, query)) {
850 GstVideoEncoderClass *enc_class = GST_VIDEO_ENCODER_CLASS (parent_class);
851 ret = enc_class->decide_allocation (encoder, query);
854 /* FIXME This may not be entirely correct, as encoder may keep some
855 * observation withouth delaying the encoding. Linux Media API need some
856 * more work to explicitly expressed the decoder / encoder latency. This
857 * value will then become max latency, and the reported driver latency would
858 * become the min latency. */
859 latency = self->v4l2capture->min_buffers * self->v4l2capture->duration;
860 gst_video_encoder_set_latency (encoder, latency, latency);
863 gst_video_codec_state_unref (state);
868 gst_v4l2_video_enc_propose_allocation (GstVideoEncoder *
869 encoder, GstQuery * query)
871 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
872 gboolean ret = FALSE;
874 GST_DEBUG_OBJECT (self, "called");
879 ret = gst_v4l2_object_propose_allocation (self->v4l2output, query);
882 ret = GST_VIDEO_ENCODER_CLASS (parent_class)->propose_allocation (encoder,
889 gst_v4l2_video_enc_src_query (GstVideoEncoder * encoder, GstQuery * query)
892 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
893 switch (GST_QUERY_TYPE (query)) {
894 case GST_QUERY_CAPS:{
895 GstCaps *filter, *result = NULL;
896 GstPad *pad = GST_VIDEO_ENCODER_SRC_PAD (encoder);
898 gst_query_parse_caps (query, &filter);
900 /* FIXME Try and not probe the entire encoder, but only the implement
902 if (self->probed_srccaps) {
903 GstCaps *tmpl = gst_pad_get_pad_template_caps (pad);
904 result = gst_caps_intersect (tmpl, self->probed_srccaps);
905 gst_caps_unref (tmpl);
907 result = gst_pad_get_pad_template_caps (pad);
910 GstCaps *tmp = result;
912 gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
913 gst_caps_unref (tmp);
916 GST_DEBUG_OBJECT (self, "Returning src caps %" GST_PTR_FORMAT, result);
918 gst_query_set_caps_result (query, result);
919 gst_caps_unref (result);
924 ret = GST_VIDEO_ENCODER_CLASS (parent_class)->src_query (encoder, query);
932 gst_v4l2_video_enc_sink_query (GstVideoEncoder * encoder, GstQuery * query)
935 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
937 switch (GST_QUERY_TYPE (query)) {
938 case GST_QUERY_CAPS:{
939 GstCaps *filter, *result = NULL;
940 GstPad *pad = GST_VIDEO_ENCODER_SINK_PAD (encoder);
942 gst_query_parse_caps (query, &filter);
944 if (self->probed_sinkcaps)
945 result = gst_caps_ref (self->probed_sinkcaps);
947 result = gst_pad_get_pad_template_caps (pad);
950 GstCaps *tmp = result;
952 gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
953 gst_caps_unref (tmp);
956 GST_DEBUG_OBJECT (self, "Returning sink caps %" GST_PTR_FORMAT, result);
958 gst_query_set_caps_result (query, result);
959 gst_caps_unref (result);
964 ret = GST_VIDEO_ENCODER_CLASS (parent_class)->sink_query (encoder, query);
972 gst_v4l2_video_enc_sink_event (GstVideoEncoder * encoder, GstEvent * event)
974 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
976 GstEventType type = GST_EVENT_TYPE (event);
979 case GST_EVENT_FLUSH_START:
980 GST_DEBUG_OBJECT (self, "flush start");
981 gst_v4l2_object_unlock (self->v4l2output);
982 gst_v4l2_object_unlock (self->v4l2capture);
988 ret = GST_VIDEO_ENCODER_CLASS (parent_class)->sink_event (encoder, event);
991 case GST_EVENT_FLUSH_START:
992 gst_pad_stop_task (encoder->srcpad);
993 GST_DEBUG_OBJECT (self, "flush start done");
1001 static GstStateChangeReturn
1002 gst_v4l2_video_enc_change_state (GstElement * element,
1003 GstStateChange transition)
1005 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (element);
1007 if (transition == GST_STATE_CHANGE_PAUSED_TO_READY) {
1008 g_atomic_int_set (&self->active, FALSE);
1009 gst_v4l2_object_unlock (self->v4l2output);
1010 gst_v4l2_object_unlock (self->v4l2capture);
1013 return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1018 gst_v4l2_video_enc_dispose (GObject * object)
1020 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (object);
1022 gst_caps_replace (&self->probed_sinkcaps, NULL);
1023 gst_caps_replace (&self->probed_srccaps, NULL);
1025 G_OBJECT_CLASS (parent_class)->dispose (object);
1029 gst_v4l2_video_enc_finalize (GObject * object)
1031 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (object);
1033 gst_v4l2_object_destroy (self->v4l2capture);
1034 gst_v4l2_object_destroy (self->v4l2output);
1036 G_OBJECT_CLASS (parent_class)->finalize (object);
1041 gst_v4l2_video_enc_init (GstV4l2VideoEnc * self)
1043 /* V4L2 object are created in subinstance_init */
1047 gst_v4l2_video_enc_subinstance_init (GTypeInstance * instance, gpointer g_class)
1049 GstV4l2VideoEncClass *klass = GST_V4L2_VIDEO_ENC_CLASS (g_class);
1050 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (instance);
1052 self->v4l2output = gst_v4l2_object_new (GST_ELEMENT (self),
1053 GST_OBJECT (GST_VIDEO_ENCODER_SINK_PAD (self)),
1054 V4L2_BUF_TYPE_VIDEO_OUTPUT, klass->default_device,
1055 gst_v4l2_get_output, gst_v4l2_set_output, NULL);
1056 self->v4l2output->no_initial_format = TRUE;
1057 self->v4l2output->keep_aspect = FALSE;
1059 self->v4l2capture = gst_v4l2_object_new (GST_ELEMENT (self),
1060 GST_OBJECT (GST_VIDEO_ENCODER_SRC_PAD (self)),
1061 V4L2_BUF_TYPE_VIDEO_CAPTURE, klass->default_device,
1062 gst_v4l2_get_input, gst_v4l2_set_input, NULL);
1066 gst_v4l2_video_enc_class_init (GstV4l2VideoEncClass * klass)
1068 GstElementClass *element_class;
1069 GObjectClass *gobject_class;
1070 GstVideoEncoderClass *video_encoder_class;
1072 parent_class = g_type_class_peek_parent (klass);
1074 element_class = (GstElementClass *) klass;
1075 gobject_class = (GObjectClass *) klass;
1076 video_encoder_class = (GstVideoEncoderClass *) klass;
1078 GST_DEBUG_CATEGORY_INIT (gst_v4l2_video_enc_debug, "v4l2videoenc", 0,
1079 "V4L2 Video Encoder");
1081 gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_dispose);
1082 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_finalize);
1083 gobject_class->set_property =
1084 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_set_property);
1085 gobject_class->get_property =
1086 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_get_property);
1088 video_encoder_class->open = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_open);
1089 video_encoder_class->close = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_close);
1090 video_encoder_class->start = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_start);
1091 video_encoder_class->stop = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_stop);
1092 video_encoder_class->finish = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_finish);
1093 video_encoder_class->flush = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_flush);
1094 video_encoder_class->set_format =
1095 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_set_format);
1096 video_encoder_class->negotiate =
1097 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_negotiate);
1098 video_encoder_class->decide_allocation =
1099 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_decide_allocation);
1100 video_encoder_class->propose_allocation =
1101 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_propose_allocation);
1102 video_encoder_class->sink_query =
1103 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_sink_query);
1104 video_encoder_class->src_query =
1105 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_src_query);
1106 video_encoder_class->sink_event =
1107 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_sink_event);
1108 video_encoder_class->handle_frame =
1109 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_handle_frame);
1111 element_class->change_state =
1112 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_change_state);
1114 gst_v4l2_object_install_m2m_properties_helper (gobject_class);
1118 gst_v4l2_video_enc_subclass_init (gpointer g_class, gpointer data)
1120 GstV4l2VideoEncClass *klass = GST_V4L2_VIDEO_ENC_CLASS (g_class);
1121 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
1122 GstV4l2VideoEncCData *cdata = data;
1124 klass->default_device = cdata->device;
1126 /* Note: gst_pad_template_new() take the floating ref from the caps */
1127 gst_element_class_add_pad_template (element_class,
1128 gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
1130 gst_element_class_add_pad_template (element_class,
1131 gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
1134 gst_caps_unref (cdata->sink_caps);
1135 gst_caps_unref (cdata->src_caps);
1139 /* Probing functions */
1141 gst_v4l2_is_video_enc (GstCaps * sink_caps, GstCaps * src_caps,
1142 GstCaps * codec_caps)
1144 gboolean ret = FALSE;
1145 gboolean (*check_caps) (const GstCaps *, const GstCaps *);
1148 check_caps = gst_caps_can_intersect;
1150 codec_caps = gst_v4l2_object_get_codec_caps ();
1151 check_caps = gst_caps_is_subset;
1154 if (gst_caps_is_subset (sink_caps, gst_v4l2_object_get_raw_caps ())
1155 && check_caps (src_caps, codec_caps))
1162 gst_v4l2_video_enc_register (GstPlugin * plugin, GType type,
1163 const char *codec, const gchar * basename, const gchar * device_path,
1164 GstCaps * sink_caps, GstCaps * codec_caps, GstCaps * src_caps)
1166 GstCaps *filtered_caps;
1167 GTypeQuery type_query;
1168 GTypeInfo type_info = { 0, };
1171 GstV4l2VideoEncCData *cdata;
1173 filtered_caps = gst_caps_intersect (src_caps, codec_caps);
1175 cdata = g_new0 (GstV4l2VideoEncCData, 1);
1176 cdata->device = g_strdup (device_path);
1177 cdata->sink_caps = gst_caps_ref (sink_caps);
1178 cdata->src_caps = gst_caps_ref (filtered_caps);
1180 g_type_query (type, &type_query);
1181 memset (&type_info, 0, sizeof (type_info));
1182 type_info.class_size = type_query.class_size;
1183 type_info.instance_size = type_query.instance_size;
1184 type_info.class_init = gst_v4l2_video_enc_subclass_init;
1185 type_info.class_data = cdata;
1186 type_info.instance_init = gst_v4l2_video_enc_subinstance_init;
1188 /* The first encoder to be registered should use a constant name, like
1189 * v4l2h264enc, for any additional encoders, we create unique names. Encoder
1190 * names may change between boots, so this should help gain stable names for
1191 * the most common use cases. */
1192 type_name = g_strdup_printf ("v4l2%senc", codec);
1194 if (g_type_from_name (type_name) != 0) {
1196 type_name = g_strdup_printf ("v4l2%s%senc", basename, codec);
1199 subtype = g_type_register_static (type, type_name, &type_info, 0);
1201 if (!gst_element_register (plugin, type_name, GST_RANK_PRIMARY + 1, subtype))
1202 GST_WARNING ("Failed to register plugin '%s'", type_name);