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_OUTPUT_IO_MODE:
68 gst_v4l2_object_set_property_helper (self->v4l2output,
69 prop_id, value, pspec);
71 case PROP_CAPTURE_IO_MODE:
72 gst_v4l2_object_set_property_helper (self->v4l2capture,
73 prop_id, value, pspec);
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_enc_get_property (GObject * object,
88 guint prop_id, GValue * value, GParamSpec * pspec)
90 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (object);
93 case PROP_OUTPUT_IO_MODE:
94 gst_v4l2_object_get_property_helper (self->v4l2output,
95 prop_id, value, pspec);
97 case PROP_CAPTURE_IO_MODE:
98 gst_v4l2_object_get_property_helper (self->v4l2output,
99 PROP_IO_MODE, value, pspec);
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_enc_open (GstVideoEncoder * encoder)
115 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
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 self->probed_sinkcaps = gst_v4l2_object_probe_caps (self->v4l2output,
127 gst_v4l2_object_get_raw_caps ());
129 if (gst_caps_is_empty (self->probed_sinkcaps))
132 codec_caps = gst_pad_get_pad_template_caps (encoder->srcpad);
133 self->probed_srccaps = gst_v4l2_object_probe_caps (self->v4l2capture,
135 gst_caps_unref (codec_caps);
137 if (gst_caps_is_empty (self->probed_srccaps))
138 goto no_encoded_format;
143 GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
144 (_("Encoder on device %s has no supported output format"),
145 self->v4l2output->videodev), (NULL));
150 GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
151 (_("Encoder on device %s has no supported input 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_enc_close (GstVideoEncoder * encoder)
171 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
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_enc_start (GstVideoEncoder * encoder)
186 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
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_enc_stop (GstVideoEncoder * encoder)
200 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
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 (encoder->srcpad);
210 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
211 self->output_flow = GST_FLOW_OK;
212 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
214 /* Should have been flushed already */
215 g_assert (g_atomic_int_get (&self->active) == FALSE);
216 g_assert (g_atomic_int_get (&self->processing) == FALSE);
218 gst_v4l2_object_stop (self->v4l2output);
219 gst_v4l2_object_stop (self->v4l2capture);
221 if (self->input_state) {
222 gst_video_codec_state_unref (self->input_state);
223 self->input_state = NULL;
226 GST_DEBUG_OBJECT (self, "Stopped");
232 gst_v4l2_encoder_cmd (GstV4l2Object * v4l2object, guint cmd, guint flags)
234 struct v4l2_encoder_cmd ecmd = { 0, };
236 GST_DEBUG_OBJECT (v4l2object->element,
237 "sending v4l2 encoder command %u with flags %u", cmd, flags);
239 if (!GST_V4L2_IS_OPEN (v4l2object))
244 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_ENCODER_CMD, &ecmd) < 0)
250 if (errno == ENOTTY) {
251 GST_INFO_OBJECT (v4l2object->element,
252 "Failed to send encoder command %u with flags %u for '%s'. (%s)",
253 cmd, flags, v4l2object->videodev, g_strerror (errno));
255 GST_ERROR_OBJECT (v4l2object->element,
256 "Failed to send encoder command %u with flags %u for '%s'. (%s)",
257 cmd, flags, v4l2object->videodev, g_strerror (errno));
263 gst_v4l2_video_enc_finish (GstVideoEncoder * encoder)
265 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
266 GstFlowReturn ret = GST_FLOW_OK;
268 if (gst_pad_get_task_state (encoder->srcpad) != GST_TASK_STARTED)
271 GST_DEBUG_OBJECT (self, "Finishing encoding");
273 /* drop the stream lock while draining, so remaining buffers can be
274 * pushed from the src pad task thread */
275 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
277 if (gst_v4l2_encoder_cmd (self->v4l2capture, V4L2_ENC_CMD_STOP, 0)) {
278 GstTask *task = encoder->srcpad->task;
280 /* Wait for the task to be drained */
281 GST_OBJECT_LOCK (task);
282 while (GST_TASK_STATE (task) == GST_TASK_STARTED)
283 GST_TASK_WAIT (task);
284 GST_OBJECT_UNLOCK (task);
285 ret = GST_FLOW_FLUSHING;
288 /* and ensure the processing thread has stopped in case another error
290 gst_v4l2_object_unlock (self->v4l2capture);
291 gst_pad_stop_task (encoder->srcpad);
292 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
294 if (ret == GST_FLOW_FLUSHING)
295 ret = self->output_flow;
297 GST_DEBUG_OBJECT (encoder, "Done draining buffers");
304 gst_v4l2_video_enc_set_format (GstVideoEncoder * encoder,
305 GstVideoCodecState * state)
308 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
309 GstV4l2Error error = GST_V4L2_ERROR_INIT;
311 GstVideoCodecState *output;
313 GST_DEBUG_OBJECT (self, "Setting format: %" GST_PTR_FORMAT, state->caps);
315 if (self->input_state) {
316 if (gst_v4l2_object_caps_equal (self->v4l2output, state->caps)) {
317 GST_DEBUG_OBJECT (self, "Compatible caps");
321 if (gst_v4l2_video_enc_finish (encoder) != GST_FLOW_OK)
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 allowed_caps = gst_pad_get_allowed_caps (GST_VIDEO_ENCODER_SRC_PAD (encoder));
529 if (gst_caps_is_empty (allowed_caps))
532 allowed_caps = gst_caps_make_writable (allowed_caps);
534 /* negotiate_profile_and_level() will return TRUE on failure to keep
535 * iterating, if gst_caps_foreach() returns TRUE it means there was no
536 * compatible profile and level in any of the structure */
537 if (gst_caps_foreach (allowed_caps, negotiate_profile_and_level, &ctx)) {
538 goto no_profile_level;
542 if (klass->profile_cid && !ctx.profile) {
543 struct v4l2_control control = { 0, };
545 control.id = klass->profile_cid;
547 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CTRL, &control) < 0)
550 ctx.profile = klass->profile_to_string (control.value);
553 if (klass->level_cid && !ctx.level) {
554 struct v4l2_control control = { 0, };
556 control.id = klass->level_cid;
558 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CTRL, &control) < 0)
561 ctx.level = klass->level_to_string (control.value);
564 GST_DEBUG_OBJECT (self, "Selected %s profile %s at level %s",
565 klass->codec_name, ctx.profile, ctx.level);
567 state = gst_video_encoder_get_output_state (encoder);
568 s = gst_caps_get_structure (state->caps, 0);
570 if (klass->profile_cid)
571 gst_structure_set (s, "profile", G_TYPE_STRING, ctx.profile, NULL);
573 if (klass->level_cid)
574 gst_structure_set (s, "level", G_TYPE_STRING, ctx.level, NULL);
576 if (!GST_VIDEO_ENCODER_CLASS (parent_class)->negotiate (encoder))
579 if (!gst_buffer_pool_set_active (GST_BUFFER_POOL (self->v4l2capture->pool),
581 GST_WARNING_OBJECT (self, "Could not activate capture buffer pool.");
588 GST_WARNING_OBJECT (self, "Failed to get %s profile and level: '%s'",
589 klass->codec_name, g_strerror (errno));
593 GST_WARNING_OBJECT (self, "No compatible level and profile in caps: %"
594 GST_PTR_FORMAT, allowed_caps);
599 gst_caps_unref (allowed_caps);
603 static GstVideoCodecFrame *
604 gst_v4l2_video_enc_get_oldest_frame (GstVideoEncoder * encoder)
606 GstVideoCodecFrame *frame = NULL;
610 frames = gst_video_encoder_get_frames (encoder);
612 for (l = frames; l != NULL; l = l->next) {
613 GstVideoCodecFrame *f = l->data;
615 if (!frame || frame->pts > f->pts)
622 GST_LOG_OBJECT (encoder,
623 "Oldest frame is %d %" GST_TIME_FORMAT
624 " and %d frames left",
625 frame->system_frame_number, GST_TIME_ARGS (frame->pts), count - 1);
626 gst_video_codec_frame_ref (frame);
629 g_list_free_full (frames, (GDestroyNotify) gst_video_codec_frame_unref);
635 gst_v4l2_video_enc_loop (GstVideoEncoder * encoder)
637 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
638 GstVideoCodecFrame *frame;
639 GstBuffer *buffer = NULL;
642 GST_LOG_OBJECT (encoder, "Allocate output buffer");
644 buffer = gst_video_encoder_allocate_output_buffer (encoder,
645 self->v4l2capture->info.size);
647 if (NULL == buffer) {
648 ret = GST_FLOW_FLUSHING;
653 /* FIXME Check if buffer isn't the last one here */
655 GST_LOG_OBJECT (encoder, "Process output buffer");
657 gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL
658 (self->v4l2capture->pool), &buffer);
660 if (ret != GST_FLOW_OK)
663 frame = gst_v4l2_video_enc_get_oldest_frame (encoder);
666 frame->output_buffer = buffer;
668 ret = gst_video_encoder_finish_frame (encoder, frame);
670 if (ret != GST_FLOW_OK)
673 GST_WARNING_OBJECT (encoder, "Encoder is producing too many buffers");
674 gst_buffer_unref (buffer);
680 GST_DEBUG_OBJECT (encoder, "Leaving output thread");
682 gst_buffer_replace (&buffer, NULL);
683 self->output_flow = ret;
684 g_atomic_int_set (&self->processing, FALSE);
685 gst_v4l2_object_unlock (self->v4l2output);
686 gst_pad_pause_task (encoder->srcpad);
690 gst_v4l2_video_enc_loop_stopped (GstV4l2VideoEnc * self)
692 if (g_atomic_int_get (&self->processing)) {
693 GST_DEBUG_OBJECT (self, "Early stop of encoding thread");
694 self->output_flow = GST_FLOW_FLUSHING;
695 g_atomic_int_set (&self->processing, FALSE);
698 GST_DEBUG_OBJECT (self, "Encoding task destroyed: %s",
699 gst_flow_get_name (self->output_flow));
704 gst_v4l2_video_enc_handle_frame (GstVideoEncoder * encoder,
705 GstVideoCodecFrame * frame)
707 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
708 GstFlowReturn ret = GST_FLOW_OK;
710 GST_DEBUG_OBJECT (self, "Handling frame %d", frame->system_frame_number);
712 if (G_UNLIKELY (!g_atomic_int_get (&self->active)))
715 if (gst_pad_get_task_state (GST_VIDEO_DECODER_SRC_PAD (self)) ==
717 GstBufferPool *pool = GST_BUFFER_POOL (self->v4l2output->pool);
719 /* It possible that the processing thread stopped due to an error */
720 if (self->output_flow != GST_FLOW_OK &&
721 self->output_flow != GST_FLOW_FLUSHING) {
722 GST_DEBUG_OBJECT (self, "Processing loop stopped with error, leaving");
723 ret = self->output_flow;
727 /* Ensure input internal pool is active */
728 if (!gst_buffer_pool_is_active (pool)) {
729 GstStructure *config = gst_buffer_pool_get_config (pool);
730 guint min = MAX (self->v4l2output->min_buffers, GST_V4L2_MIN_BUFFERS);
732 gst_buffer_pool_config_set_params (config, self->input_state->caps,
733 self->v4l2output->info.size, min, min);
735 /* There is no reason to refuse this config */
736 if (!gst_buffer_pool_set_config (pool, config))
737 goto activate_failed;
739 if (!gst_buffer_pool_set_active (pool, TRUE))
740 goto activate_failed;
743 GST_DEBUG_OBJECT (self, "Starting encoding thread");
745 /* Start the processing task, when it quits, the task will disable input
746 * processing to unlock input if draining, or prevent potential block */
747 if (!gst_pad_start_task (encoder->srcpad,
748 (GstTaskFunction) gst_v4l2_video_enc_loop, self,
749 (GDestroyNotify) gst_v4l2_video_enc_loop_stopped))
750 goto start_task_failed;
753 if (frame->input_buffer) {
754 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
756 gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL
757 (self->v4l2output->pool), &frame->input_buffer);
758 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
760 if (ret == GST_FLOW_FLUSHING) {
761 if (gst_pad_get_task_state (GST_VIDEO_DECODER_SRC_PAD (self)) !=
763 ret = self->output_flow;
765 } else if (ret != GST_FLOW_OK) {
770 gst_video_codec_frame_unref (frame);
776 GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
777 (_("Failed to allocate required memory.")),
778 ("Buffer pool activation failed"));
779 return GST_FLOW_ERROR;
784 ret = GST_FLOW_FLUSHING;
789 GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
790 (_("Failed to start encoding thread.")), (NULL));
791 g_atomic_int_set (&self->processing, FALSE);
792 ret = GST_FLOW_ERROR;
797 GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
798 (_("Failed to process frame.")),
799 ("Maybe be due to not enough memory or failing driver"));
800 ret = GST_FLOW_ERROR;
805 gst_video_encoder_finish_frame (encoder, frame);
811 gst_v4l2_video_enc_decide_allocation (GstVideoEncoder *
812 encoder, GstQuery * query)
814 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
815 GstVideoCodecState *state = gst_video_encoder_get_output_state (encoder);
816 GstV4l2Error error = GST_V4L2_ERROR_INIT;
817 GstClockTime latency;
818 gboolean ret = FALSE;
820 /* We need to set the format here, since this is called right after
821 * GstVideoEncoder have set the width, height and framerate into the state
822 * caps. These are needed by the driver to calculate the buffer size and to
823 * implement bitrate adaptation. */
824 if (!gst_v4l2_object_set_format (self->v4l2capture, state->caps, &error)) {
825 gst_v4l2_error (self, &error);
830 if (gst_v4l2_object_decide_allocation (self->v4l2capture, query)) {
831 GstVideoEncoderClass *enc_class = GST_VIDEO_ENCODER_CLASS (parent_class);
832 ret = enc_class->decide_allocation (encoder, query);
835 /* FIXME This may not be entirely correct, as encoder may keep some
836 * observation withouth delaying the encoding. Linux Media API need some
837 * more work to explicitly expressed the decoder / encoder latency. This
838 * value will then become max latency, and the reported driver latency would
839 * become the min latency. */
840 latency = self->v4l2capture->min_buffers * self->v4l2capture->duration;
841 gst_video_encoder_set_latency (encoder, latency, latency);
844 gst_video_codec_state_unref (state);
849 gst_v4l2_video_enc_propose_allocation (GstVideoEncoder *
850 encoder, GstQuery * query)
852 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
853 gboolean ret = FALSE;
855 GST_DEBUG_OBJECT (self, "called");
860 ret = gst_v4l2_object_propose_allocation (self->v4l2output, query);
863 ret = GST_VIDEO_ENCODER_CLASS (parent_class)->propose_allocation (encoder,
870 gst_v4l2_video_enc_src_query (GstVideoEncoder * encoder, GstQuery * query)
873 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
874 switch (GST_QUERY_TYPE (query)) {
875 case GST_QUERY_CAPS:{
876 GstCaps *filter, *result = NULL;
877 GstPad *pad = GST_VIDEO_ENCODER_SRC_PAD (encoder);
879 gst_query_parse_caps (query, &filter);
881 /* FIXME Try and not probe the entire encoder, but only the implement
883 if (self->probed_srccaps) {
884 GstCaps *tmpl = gst_pad_get_pad_template_caps (pad);
885 result = gst_caps_intersect (tmpl, self->probed_srccaps);
886 gst_caps_unref (tmpl);
888 result = gst_pad_get_pad_template_caps (pad);
891 GstCaps *tmp = result;
893 gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
894 gst_caps_unref (tmp);
897 GST_DEBUG_OBJECT (self, "Returning src caps %" GST_PTR_FORMAT, result);
899 gst_query_set_caps_result (query, result);
900 gst_caps_unref (result);
905 ret = GST_VIDEO_ENCODER_CLASS (parent_class)->src_query (encoder, query);
913 gst_v4l2_video_enc_sink_query (GstVideoEncoder * encoder, GstQuery * query)
916 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
918 switch (GST_QUERY_TYPE (query)) {
919 case GST_QUERY_CAPS:{
920 GstCaps *filter, *result = NULL;
921 GstPad *pad = GST_VIDEO_ENCODER_SINK_PAD (encoder);
923 gst_query_parse_caps (query, &filter);
925 if (self->probed_sinkcaps)
926 result = gst_caps_ref (self->probed_sinkcaps);
928 result = gst_pad_get_pad_template_caps (pad);
931 GstCaps *tmp = result;
933 gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
934 gst_caps_unref (tmp);
937 GST_DEBUG_OBJECT (self, "Returning sink caps %" GST_PTR_FORMAT, result);
939 gst_query_set_caps_result (query, result);
940 gst_caps_unref (result);
945 ret = GST_VIDEO_ENCODER_CLASS (parent_class)->sink_query (encoder, query);
953 gst_v4l2_video_enc_sink_event (GstVideoEncoder * encoder, GstEvent * event)
955 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
958 switch (GST_EVENT_TYPE (event)) {
959 case GST_EVENT_FLUSH_START:
960 GST_DEBUG_OBJECT (self, "flush start");
961 gst_v4l2_object_unlock (self->v4l2output);
962 gst_v4l2_object_unlock (self->v4l2capture);
968 ret = GST_VIDEO_ENCODER_CLASS (parent_class)->sink_event (encoder, event);
970 switch (GST_EVENT_TYPE (event)) {
971 case GST_EVENT_FLUSH_START:
972 gst_pad_stop_task (encoder->srcpad);
973 GST_DEBUG_OBJECT (self, "flush start done");
981 static GstStateChangeReturn
982 gst_v4l2_video_enc_change_state (GstElement * element,
983 GstStateChange transition)
985 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (element);
987 if (transition == GST_STATE_CHANGE_PAUSED_TO_READY) {
988 g_atomic_int_set (&self->active, FALSE);
989 gst_v4l2_object_unlock (self->v4l2output);
990 gst_v4l2_object_unlock (self->v4l2capture);
993 return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
998 gst_v4l2_video_enc_dispose (GObject * object)
1000 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (object);
1002 gst_caps_replace (&self->probed_sinkcaps, NULL);
1003 gst_caps_replace (&self->probed_srccaps, NULL);
1005 G_OBJECT_CLASS (parent_class)->dispose (object);
1009 gst_v4l2_video_enc_finalize (GObject * object)
1011 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (object);
1013 gst_v4l2_object_destroy (self->v4l2capture);
1014 gst_v4l2_object_destroy (self->v4l2output);
1016 G_OBJECT_CLASS (parent_class)->finalize (object);
1021 gst_v4l2_video_enc_init (GstV4l2VideoEnc * self)
1023 /* V4L2 object are created in subinstance_init */
1027 gst_v4l2_video_enc_subinstance_init (GTypeInstance * instance, gpointer g_class)
1029 GstV4l2VideoEncClass *klass = GST_V4L2_VIDEO_ENC_CLASS (g_class);
1030 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (instance);
1032 self->v4l2output = gst_v4l2_object_new (GST_ELEMENT (self),
1033 V4L2_BUF_TYPE_VIDEO_OUTPUT, klass->default_device,
1034 gst_v4l2_get_output, gst_v4l2_set_output, NULL);
1035 self->v4l2output->no_initial_format = TRUE;
1036 self->v4l2output->keep_aspect = FALSE;
1038 self->v4l2capture = gst_v4l2_object_new (GST_ELEMENT (self),
1039 V4L2_BUF_TYPE_VIDEO_CAPTURE, klass->default_device,
1040 gst_v4l2_get_input, gst_v4l2_set_input, NULL);
1041 self->v4l2capture->no_initial_format = TRUE;
1042 self->v4l2output->keep_aspect = FALSE;
1046 gst_v4l2_video_enc_class_init (GstV4l2VideoEncClass * klass)
1048 GstElementClass *element_class;
1049 GObjectClass *gobject_class;
1050 GstVideoEncoderClass *video_encoder_class;
1052 parent_class = g_type_class_peek_parent (klass);
1054 element_class = (GstElementClass *) klass;
1055 gobject_class = (GObjectClass *) klass;
1056 video_encoder_class = (GstVideoEncoderClass *) klass;
1058 GST_DEBUG_CATEGORY_INIT (gst_v4l2_video_enc_debug, "v4l2videoenc", 0,
1059 "V4L2 Video Encoder");
1061 gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_dispose);
1062 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_finalize);
1063 gobject_class->set_property =
1064 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_set_property);
1065 gobject_class->get_property =
1066 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_get_property);
1068 video_encoder_class->open = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_open);
1069 video_encoder_class->close = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_close);
1070 video_encoder_class->start = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_start);
1071 video_encoder_class->stop = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_stop);
1072 video_encoder_class->finish = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_finish);
1073 video_encoder_class->flush = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_flush);
1074 video_encoder_class->set_format =
1075 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_set_format);
1076 video_encoder_class->negotiate =
1077 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_negotiate);
1078 video_encoder_class->decide_allocation =
1079 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_decide_allocation);
1080 video_encoder_class->propose_allocation =
1081 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_propose_allocation);
1082 video_encoder_class->sink_query =
1083 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_sink_query);
1084 video_encoder_class->src_query =
1085 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_src_query);
1086 video_encoder_class->sink_event =
1087 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_sink_event);
1088 video_encoder_class->handle_frame =
1089 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_handle_frame);
1091 element_class->change_state =
1092 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_change_state);
1094 gst_v4l2_object_install_m2m_properties_helper (gobject_class);
1098 gst_v4l2_video_enc_subclass_init (gpointer g_class, gpointer data)
1100 GstV4l2VideoEncClass *klass = GST_V4L2_VIDEO_ENC_CLASS (g_class);
1101 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
1102 GstV4l2VideoEncCData *cdata = data;
1104 klass->default_device = cdata->device;
1106 /* Note: gst_pad_template_new() take the floating ref from the caps */
1107 gst_element_class_add_pad_template (element_class,
1108 gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
1110 gst_element_class_add_pad_template (element_class,
1111 gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
1117 /* Probing functions */
1119 gst_v4l2_is_video_enc (GstCaps * sink_caps, GstCaps * src_caps,
1120 GstCaps * codec_caps)
1122 gboolean ret = FALSE;
1123 gboolean (*check_caps) (const GstCaps *, const GstCaps *);
1126 check_caps = gst_caps_can_intersect;
1128 codec_caps = gst_v4l2_object_get_codec_caps ();
1129 check_caps = gst_caps_is_subset;
1132 if (gst_caps_is_subset (sink_caps, gst_v4l2_object_get_raw_caps ())
1133 && check_caps (src_caps, gst_v4l2_object_get_codec_caps ()))
1140 gst_v4l2_video_enc_register (GstPlugin * plugin, GType type,
1141 const char *codec, const gchar * basename, const gchar * device_path,
1142 GstCaps * sink_caps, GstCaps * codec_caps, GstCaps * src_caps)
1144 GstCaps *filtered_caps;
1145 GTypeQuery type_query;
1146 GTypeInfo type_info = { 0, };
1149 GstV4l2VideoEncCData *cdata;
1151 filtered_caps = gst_caps_intersect (src_caps, codec_caps);
1153 cdata = g_new0 (GstV4l2VideoEncCData, 1);
1154 cdata->device = g_strdup (device_path);
1155 cdata->sink_caps = gst_caps_ref (sink_caps);
1156 cdata->src_caps = gst_caps_ref (filtered_caps);
1158 g_type_query (type, &type_query);
1159 memset (&type_info, 0, sizeof (type_info));
1160 type_info.class_size = type_query.class_size;
1161 type_info.instance_size = type_query.instance_size;
1162 type_info.class_init = gst_v4l2_video_enc_subclass_init;
1163 type_info.class_data = cdata;
1164 type_info.instance_init = gst_v4l2_video_enc_subinstance_init;
1166 /* The first encoder to be registered should use a constant name, like
1167 * v4l2h264enc, for any additional encoders, we create unique names. Encoder
1168 * names may change between boots, so this should help gain stable names for
1169 * the most common use cases. */
1170 type_name = g_strdup_printf ("v4l2%senc", codec);
1172 if (g_type_from_name (type_name) != 0) {
1174 type_name = g_strdup_printf ("v4l2%s%senc", basename, codec);
1177 subtype = g_type_register_static (type, type_name, &type_info, 0);
1179 if (!gst_element_register (plugin, type_name, GST_RANK_PRIMARY + 1, subtype))
1180 GST_WARNING ("Failed to register plugin '%s'", type_name);