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 const GstV4l2Codec *codec;
49 } GstV4l2VideoEncCData;
54 V4L2_STD_OBJECT_PROPS,
57 #define gst_v4l2_video_enc_parent_class parent_class
58 G_DEFINE_ABSTRACT_TYPE (GstV4l2VideoEnc, gst_v4l2_video_enc,
59 GST_TYPE_VIDEO_ENCODER);
62 gst_v4l2_video_enc_set_property (GObject * object,
63 guint prop_id, const GValue * value, GParamSpec * pspec)
65 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (object);
68 case PROP_CAPTURE_IO_MODE:
69 if (!gst_v4l2_object_set_property_helper (self->v4l2capture,
70 prop_id, value, pspec)) {
71 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
75 /* By default, only set on output */
77 if (!gst_v4l2_object_set_property_helper (self->v4l2output,
78 prop_id, value, pspec)) {
79 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
86 gst_v4l2_video_enc_get_property (GObject * object,
87 guint prop_id, GValue * value, GParamSpec * pspec)
89 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (object);
92 case PROP_CAPTURE_IO_MODE:
93 if (!gst_v4l2_object_get_property_helper (self->v4l2capture,
94 prop_id, value, pspec)) {
95 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
99 /* By default read from output */
101 if (!gst_v4l2_object_get_property_helper (self->v4l2output,
102 prop_id, value, pspec)) {
103 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
110 gst_v4l2_video_enc_open (GstVideoEncoder * encoder)
112 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
113 GstV4l2Error error = GST_V4L2_ERROR_INIT;
116 GST_DEBUG_OBJECT (self, "Opening");
118 if (!gst_v4l2_object_open (self->v4l2output, &error))
121 if (!gst_v4l2_object_open_shared (self->v4l2capture, self->v4l2output))
124 self->probed_sinkcaps = gst_v4l2_object_probe_caps (self->v4l2output,
125 gst_v4l2_object_get_raw_caps ());
127 if (gst_caps_is_empty (self->probed_sinkcaps))
130 codec_caps = gst_pad_get_pad_template_caps (encoder->srcpad);
131 self->probed_srccaps = gst_v4l2_object_probe_caps (self->v4l2capture,
133 gst_caps_unref (codec_caps);
135 if (gst_caps_is_empty (self->probed_srccaps))
136 goto no_encoded_format;
141 GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
142 (_("Encoder on device %s has no supported output format"),
143 self->v4l2output->videodev), (NULL));
148 GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
149 (_("Encoder on device %s has no supported input format"),
150 self->v4l2output->videodev), (NULL));
154 if (GST_V4L2_IS_OPEN (self->v4l2output))
155 gst_v4l2_object_close (self->v4l2output);
157 if (GST_V4L2_IS_OPEN (self->v4l2capture))
158 gst_v4l2_object_close (self->v4l2capture);
160 gst_caps_replace (&self->probed_srccaps, NULL);
161 gst_caps_replace (&self->probed_sinkcaps, NULL);
163 gst_v4l2_error (self, &error);
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_DEBUG_OBJECT (self, "Waiting for encoder stop");
282 GST_OBJECT_LOCK (task);
283 while (GST_TASK_STATE (task) == GST_TASK_STARTED)
284 GST_TASK_WAIT (task);
285 GST_OBJECT_UNLOCK (task);
286 ret = GST_FLOW_FLUSHING;
289 /* and ensure the processing thread has stopped in case another error
291 gst_v4l2_object_unlock (self->v4l2capture);
292 gst_pad_stop_task (encoder->srcpad);
293 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
295 if (ret == GST_FLOW_FLUSHING)
296 ret = self->output_flow;
298 GST_DEBUG_OBJECT (encoder, "Done draining buffers");
305 gst_v4l2_video_enc_set_format (GstVideoEncoder * encoder,
306 GstVideoCodecState * state)
309 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
310 GstV4l2Error error = GST_V4L2_ERROR_INIT;
312 GstVideoCodecState *output;
314 GST_DEBUG_OBJECT (self, "Setting format: %" GST_PTR_FORMAT, state->caps);
316 if (self->input_state) {
317 if (gst_v4l2_object_caps_equal (self->v4l2output, state->caps)) {
318 GST_DEBUG_OBJECT (self, "Compatible caps");
322 if (gst_v4l2_video_enc_finish (encoder) != GST_FLOW_OK)
325 gst_v4l2_object_stop (self->v4l2output);
326 gst_v4l2_object_stop (self->v4l2capture);
328 gst_video_codec_state_unref (self->input_state);
329 self->input_state = NULL;
332 outcaps = gst_pad_get_pad_template_caps (encoder->srcpad);
333 outcaps = gst_caps_make_writable (outcaps);
334 output = gst_video_encoder_set_output_state (encoder, outcaps, state);
335 gst_video_codec_state_unref (output);
337 if (!gst_video_encoder_negotiate (encoder))
340 if (!gst_v4l2_object_set_format (self->v4l2output, state->caps, &error)) {
341 gst_v4l2_error (self, &error);
345 self->input_state = gst_video_codec_state_ref (state);
347 GST_DEBUG_OBJECT (self, "output caps: %" GST_PTR_FORMAT, state->caps);
353 gst_v4l2_video_enc_flush (GstVideoEncoder * encoder)
355 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
357 GST_DEBUG_OBJECT (self, "Flushing");
359 /* Ensure the processing thread has stopped for the reverse playback
361 if (g_atomic_int_get (&self->processing)) {
362 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
364 gst_v4l2_object_unlock_stop (self->v4l2output);
365 gst_v4l2_object_unlock_stop (self->v4l2capture);
366 gst_pad_stop_task (encoder->srcpad);
368 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
372 self->output_flow = GST_FLOW_OK;
374 gst_v4l2_object_unlock_stop (self->v4l2output);
375 gst_v4l2_object_unlock_stop (self->v4l2capture);
380 struct ProfileLevelCtx
382 GstV4l2VideoEnc *self;
383 const gchar *profile;
388 get_string_list (GstStructure * s, const gchar * field, GQueue * queue)
392 value = gst_structure_get_value (s, field);
397 if (GST_VALUE_HOLDS_LIST (value)) {
400 if (gst_value_list_get_size (value) == 0)
403 for (i = 0; i < gst_value_list_get_size (value); i++) {
404 const GValue *item = gst_value_list_get_value (value, i);
406 if (G_VALUE_HOLDS_STRING (item))
407 g_queue_push_tail (queue, g_value_dup_string (item));
409 } else if (G_VALUE_HOLDS_STRING (value)) {
410 g_queue_push_tail (queue, g_value_dup_string (value));
417 negotiate_profile_and_level (GstCapsFeatures * features, GstStructure * s,
420 struct ProfileLevelCtx *ctx = user_data;
421 GstV4l2VideoEncClass *klass = GST_V4L2_VIDEO_ENC_GET_CLASS (ctx->self);
422 GstV4l2Object *v4l2object = GST_V4L2_VIDEO_ENC (ctx->self)->v4l2output;
423 GQueue profiles = G_QUEUE_INIT;
424 GQueue levels = G_QUEUE_INIT;
425 gboolean failed = FALSE;
426 const GstV4l2Codec *codec = klass->codec;
428 if (codec->profile_cid && get_string_list (s, "profile", &profiles)) {
431 for (l = profiles.head; l; l = l->next) {
432 struct v4l2_control control = { 0, };
434 const gchar *profile = l->data;
436 GST_TRACE_OBJECT (ctx->self, "Trying profile %s", profile);
438 control.id = codec->profile_cid;
440 control.value = v4l2_profile = codec->profile_from_string (profile);
442 if (control.value < 0)
445 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_S_CTRL, &control) < 0) {
446 GST_WARNING_OBJECT (ctx->self, "Failed to set %s profile: '%s'",
447 klass->codec_name, g_strerror (errno));
451 profile = codec->profile_to_string (control.value);
453 if (control.value == v4l2_profile) {
454 ctx->profile = profile;
458 if (g_list_find_custom (l, profile, g_str_equal)) {
459 ctx->profile = profile;
464 if (profiles.length && !ctx->profile)
467 g_queue_foreach (&profiles, (GFunc) g_free, NULL);
468 g_queue_clear (&profiles);
471 if (!failed && codec->level_cid && get_string_list (s, "level", &levels)) {
474 for (l = levels.head; l; l = l->next) {
475 struct v4l2_control control = { 0, };
477 const gchar *level = l->data;
479 GST_TRACE_OBJECT (ctx->self, "Trying level %s", level);
481 control.id = codec->level_cid;
482 control.value = v4l2_level = codec->level_from_string (level);
484 if (control.value < 0)
487 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_S_CTRL, &control) < 0) {
488 GST_WARNING_OBJECT (ctx->self, "Failed to set %s level: '%s'",
489 klass->codec_name, g_strerror (errno));
493 level = codec->level_to_string (control.value);
495 if (control.value == v4l2_level) {
500 if (g_list_find_custom (l, level, g_str_equal)) {
506 if (levels.length && !ctx->level)
509 g_queue_foreach (&levels, (GFunc) g_free, NULL);
510 g_queue_clear (&levels);
513 /* If it failed, we continue */
518 gst_v4l2_video_enc_negotiate (GstVideoEncoder * encoder)
520 GstV4l2VideoEncClass *klass = GST_V4L2_VIDEO_ENC_GET_CLASS (encoder);
521 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
522 GstV4l2Object *v4l2object = self->v4l2output;
523 GstCaps *allowed_caps;
524 struct ProfileLevelCtx ctx = { self, NULL, NULL };
525 GstVideoCodecState *state;
527 const GstV4l2Codec *codec = klass->codec;
529 GST_DEBUG_OBJECT (self, "Negotiating %s profile and level.",
532 /* Only renegotiate on upstream changes */
533 if (self->input_state)
539 allowed_caps = gst_pad_get_allowed_caps (GST_VIDEO_ENCODER_SRC_PAD (encoder));
543 if (gst_caps_is_empty (allowed_caps))
546 allowed_caps = gst_caps_make_writable (allowed_caps);
548 /* negotiate_profile_and_level() will return TRUE on failure to keep
549 * iterating, if gst_caps_foreach() returns TRUE it means there was no
550 * compatible profile and level in any of the structure */
551 if (gst_caps_foreach (allowed_caps, negotiate_profile_and_level, &ctx)) {
552 goto no_profile_level;
555 gst_caps_unref (allowed_caps);
559 if (codec->profile_cid && !ctx.profile) {
560 struct v4l2_control control = { 0, };
562 control.id = codec->profile_cid;
564 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CTRL, &control) < 0)
567 ctx.profile = codec->profile_to_string (control.value);
570 if (codec->level_cid && !ctx.level) {
571 struct v4l2_control control = { 0, };
573 control.id = codec->level_cid;
575 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CTRL, &control) < 0)
578 ctx.level = codec->level_to_string (control.value);
581 GST_DEBUG_OBJECT (self, "Selected %s profile %s at level %s",
582 klass->codec_name, ctx.profile, ctx.level);
584 state = gst_video_encoder_get_output_state (encoder);
585 s = gst_caps_get_structure (state->caps, 0);
587 if (codec->profile_cid)
588 gst_structure_set (s, "profile", G_TYPE_STRING, ctx.profile, NULL);
590 if (codec->level_cid)
591 gst_structure_set (s, "level", G_TYPE_STRING, ctx.level, NULL);
594 if (!GST_VIDEO_ENCODER_CLASS (parent_class)->negotiate (encoder))
600 GST_WARNING_OBJECT (self, "Failed to get %s profile and level: '%s'",
601 klass->codec_name, g_strerror (errno));
605 GST_WARNING_OBJECT (self, "No compatible level and profile in caps: %"
606 GST_PTR_FORMAT, allowed_caps);
611 gst_caps_unref (allowed_caps);
616 check_system_frame_number_too_old (guint32 current, guint32 old)
618 guint32 absdiff = current > old ? current - old : old - current;
620 /* More than 100 frames in the past, or current wrapped around */
622 /* Wraparound and difference is actually smaller than 100 */
623 if (absdiff > G_MAXUINT32 - 100)
632 gst_v4l2_video_enc_loop (GstVideoEncoder * encoder)
634 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
635 GstVideoCodecFrame *frame;
636 GstBuffer *buffer = NULL;
639 GST_LOG_OBJECT (encoder, "Allocate output buffer");
641 buffer = gst_video_encoder_allocate_output_buffer (encoder,
642 self->v4l2capture->info.size);
644 if (NULL == buffer) {
645 ret = GST_FLOW_FLUSHING;
649 /* FIXME Check if buffer isn't the last one here */
651 GST_LOG_OBJECT (encoder, "Process output buffer");
653 gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL
654 (self->v4l2capture->pool), &buffer, NULL);
656 if (ret != GST_FLOW_OK)
659 if (GST_BUFFER_TIMESTAMP (buffer) % GST_SECOND != 0)
660 GST_ERROR_OBJECT (encoder,
661 "Driver bug detected - check driver with v4l2-compliance from http://git.linuxtv.org/v4l-utils.git");
662 GST_LOG_OBJECT (encoder, "Got buffer for frame number %u",
663 (guint32) (GST_BUFFER_PTS (buffer) / GST_SECOND));
665 gst_video_encoder_get_frame (encoder,
666 GST_BUFFER_TIMESTAMP (buffer) / GST_SECOND);
669 GstVideoCodecFrame *oldest_frame;
670 gboolean warned = FALSE;
672 /* Garbage collect old frames in case of codec bugs */
673 while ((oldest_frame = gst_video_encoder_get_oldest_frame (encoder)) &&
674 check_system_frame_number_too_old (frame->system_frame_number,
675 oldest_frame->system_frame_number)) {
676 gst_video_encoder_finish_frame (encoder, oldest_frame);
680 g_warning ("%s: Too old frames, bug in encoder -- please file a bug",
681 GST_ELEMENT_NAME (encoder));
686 gst_video_codec_frame_unref (oldest_frame);
688 /* At this point, the delta unit buffer flag is already correctly set by
689 * gst_v4l2_buffer_pool_process. Since gst_video_encoder_finish_frame
690 * will overwrite it from GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT (frame),
693 if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT))
694 GST_VIDEO_CODEC_FRAME_UNSET_SYNC_POINT (frame);
696 GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT (frame);
697 frame->output_buffer = buffer;
699 ret = gst_video_encoder_finish_frame (encoder, frame);
701 if (ret != GST_FLOW_OK)
704 GST_WARNING_OBJECT (encoder, "Encoder is producing too many buffers");
705 gst_buffer_unref (buffer);
711 GST_DEBUG_OBJECT (encoder, "Leaving output thread");
713 gst_buffer_replace (&buffer, NULL);
714 self->output_flow = ret;
715 g_atomic_int_set (&self->processing, FALSE);
716 gst_v4l2_object_unlock (self->v4l2output);
717 gst_pad_pause_task (encoder->srcpad);
721 gst_v4l2_video_enc_loop_stopped (GstV4l2VideoEnc * self)
723 if (g_atomic_int_get (&self->processing)) {
724 GST_DEBUG_OBJECT (self, "Early stop of encoding thread");
725 self->output_flow = GST_FLOW_FLUSHING;
726 g_atomic_int_set (&self->processing, FALSE);
729 GST_DEBUG_OBJECT (self, "Encoding task destroyed: %s",
730 gst_flow_get_name (self->output_flow));
735 gst_v4l2_video_enc_handle_frame (GstVideoEncoder * encoder,
736 GstVideoCodecFrame * frame)
738 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
739 GstFlowReturn ret = GST_FLOW_OK;
740 GstTaskState task_state;
742 GST_DEBUG_OBJECT (self, "Handling frame %d", frame->system_frame_number);
744 if (G_UNLIKELY (!g_atomic_int_get (&self->active)))
747 task_state = gst_pad_get_task_state (GST_VIDEO_ENCODER_SRC_PAD (self));
748 if (task_state == GST_TASK_STOPPED || task_state == GST_TASK_PAUSED) {
749 GstBufferPool *pool = GST_BUFFER_POOL (self->v4l2output->pool);
751 /* It is possible that the processing thread stopped due to an error or
752 * when the last buffer has been met during the draining process. */
753 if (self->output_flow != GST_FLOW_OK &&
754 self->output_flow != GST_FLOW_FLUSHING &&
755 self->output_flow != GST_V4L2_FLOW_LAST_BUFFER) {
756 GST_DEBUG_OBJECT (self, "Processing loop stopped with error: %s, leaving",
757 gst_flow_get_name (self->output_flow));
758 ret = self->output_flow;
762 /* Ensure input internal pool is active */
763 if (!gst_buffer_pool_is_active (pool)) {
764 GstStructure *config = gst_buffer_pool_get_config (pool);
765 guint min = MAX (self->v4l2output->min_buffers,
766 GST_V4L2_MIN_BUFFERS (self->v4l2output));
768 gst_buffer_pool_config_set_params (config, self->input_state->caps,
769 self->v4l2output->info.size, min, min);
771 /* There is no reason to refuse this config */
772 if (!gst_buffer_pool_set_config (pool, config))
773 goto activate_failed;
775 if (!gst_buffer_pool_set_active (pool, TRUE))
776 goto activate_failed;
779 if (!gst_buffer_pool_set_active
780 (GST_BUFFER_POOL (self->v4l2capture->pool), TRUE)) {
781 GST_WARNING_OBJECT (self, "Could not activate capture buffer pool.");
782 goto activate_failed;
785 GST_DEBUG_OBJECT (self, "Starting encoding thread");
787 /* Start the processing task, when it quits, the task will disable input
788 * processing to unlock input if draining, or prevent potential block */
789 if (!gst_pad_start_task (encoder->srcpad,
790 (GstTaskFunction) gst_v4l2_video_enc_loop, self,
791 (GDestroyNotify) gst_v4l2_video_enc_loop_stopped))
792 goto start_task_failed;
795 if (frame->input_buffer) {
796 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
797 GST_LOG_OBJECT (encoder, "Passing buffer with frame number %u",
798 frame->system_frame_number);
800 gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL (self->
801 v4l2output->pool), &frame->input_buffer,
802 &frame->system_frame_number);
803 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
805 if (ret == GST_FLOW_FLUSHING) {
806 if (gst_pad_get_task_state (encoder->srcpad) != GST_TASK_STARTED)
807 ret = self->output_flow;
809 } else if (ret != GST_FLOW_OK) {
814 gst_video_codec_frame_unref (frame);
820 GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
821 (_("Failed to allocate required memory.")),
822 ("Buffer pool activation failed"));
823 return GST_FLOW_ERROR;
828 ret = GST_FLOW_FLUSHING;
833 GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
834 (_("Failed to start encoding thread.")), (NULL));
835 g_atomic_int_set (&self->processing, FALSE);
836 ret = GST_FLOW_ERROR;
841 GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
842 (_("Failed to process frame.")),
843 ("Maybe be due to not enough memory or failing driver"));
844 ret = GST_FLOW_ERROR;
849 gst_video_encoder_finish_frame (encoder, frame);
855 gst_v4l2_video_enc_decide_allocation (GstVideoEncoder *
856 encoder, GstQuery * query)
858 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
859 GstVideoCodecState *state = gst_video_encoder_get_output_state (encoder);
861 GstV4l2Error error = GST_V4L2_ERROR_INIT;
862 GstClockTime latency;
863 gboolean ret = FALSE;
865 /* We need to set the format here, since this is called right after
866 * GstVideoEncoder have set the width, height and framerate into the state
867 * caps. These are needed by the driver to calculate the buffer size and to
868 * implement bitrate adaptation. */
869 caps = gst_caps_copy (state->caps);
870 gst_structure_remove_field (gst_caps_get_structure (caps, 0), "colorimetry");
871 if (!gst_v4l2_object_set_format (self->v4l2capture, caps, &error)) {
872 gst_v4l2_error (self, &error);
873 gst_caps_unref (caps);
877 gst_caps_unref (caps);
879 if (gst_v4l2_object_decide_allocation (self->v4l2capture, query)) {
880 GstVideoEncoderClass *enc_class = GST_VIDEO_ENCODER_CLASS (parent_class);
881 ret = enc_class->decide_allocation (encoder, query);
884 /* FIXME This may not be entirely correct, as encoder may keep some
885 * observation without delaying the encoding. Linux Media API need some
886 * more work to explicitly expressed the decoder / encoder latency. This
887 * value will then become max latency, and the reported driver latency would
888 * become the min latency. */
889 if (!GST_CLOCK_TIME_IS_VALID (self->v4l2capture->duration))
890 self->v4l2capture->duration = gst_util_uint64_scale_int (GST_SECOND, 1, 25);
891 latency = self->v4l2capture->min_buffers * self->v4l2capture->duration;
892 gst_video_encoder_set_latency (encoder, latency, latency);
893 GST_DEBUG_OBJECT (self, "Setting latency: %" GST_TIME_FORMAT,
894 GST_TIME_ARGS (latency));
897 gst_video_codec_state_unref (state);
902 gst_v4l2_video_enc_propose_allocation (GstVideoEncoder *
903 encoder, GstQuery * query)
905 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
906 gboolean ret = FALSE;
908 GST_DEBUG_OBJECT (self, "called");
913 ret = gst_v4l2_object_propose_allocation (self->v4l2output, query);
916 ret = GST_VIDEO_ENCODER_CLASS (parent_class)->propose_allocation (encoder,
923 gst_v4l2_video_enc_src_query (GstVideoEncoder * encoder, GstQuery * query)
926 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
927 switch (GST_QUERY_TYPE (query)) {
928 case GST_QUERY_CAPS:{
929 GstCaps *filter, *result = NULL;
930 GstPad *pad = GST_VIDEO_ENCODER_SRC_PAD (encoder);
932 gst_query_parse_caps (query, &filter);
934 /* FIXME Try and not probe the entire encoder, but only the implement
936 if (self->probed_srccaps) {
937 GstCaps *tmpl = gst_pad_get_pad_template_caps (pad);
938 result = gst_caps_intersect (tmpl, self->probed_srccaps);
939 gst_caps_unref (tmpl);
941 result = gst_pad_get_pad_template_caps (pad);
944 GstCaps *tmp = result;
946 gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
947 gst_caps_unref (tmp);
950 GST_DEBUG_OBJECT (self, "Returning src caps %" GST_PTR_FORMAT, result);
952 gst_query_set_caps_result (query, result);
953 gst_caps_unref (result);
958 ret = GST_VIDEO_ENCODER_CLASS (parent_class)->src_query (encoder, query);
966 gst_v4l2_video_enc_sink_query (GstVideoEncoder * encoder, GstQuery * query)
969 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
971 switch (GST_QUERY_TYPE (query)) {
972 case GST_QUERY_CAPS:{
973 GstCaps *filter, *result = NULL;
974 GstPad *pad = GST_VIDEO_ENCODER_SINK_PAD (encoder);
976 gst_query_parse_caps (query, &filter);
978 if (self->probed_sinkcaps)
979 result = gst_caps_ref (self->probed_sinkcaps);
981 result = gst_pad_get_pad_template_caps (pad);
984 GstCaps *tmp = result;
986 gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
987 gst_caps_unref (tmp);
990 GST_DEBUG_OBJECT (self, "Returning sink caps %" GST_PTR_FORMAT, result);
992 gst_query_set_caps_result (query, result);
993 gst_caps_unref (result);
998 ret = GST_VIDEO_ENCODER_CLASS (parent_class)->sink_query (encoder, query);
1006 gst_v4l2_video_enc_sink_event (GstVideoEncoder * encoder, GstEvent * event)
1008 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
1010 GstEventType type = GST_EVENT_TYPE (event);
1013 case GST_EVENT_FLUSH_START:
1014 GST_DEBUG_OBJECT (self, "flush start");
1015 gst_v4l2_object_unlock (self->v4l2output);
1016 gst_v4l2_object_unlock (self->v4l2capture);
1022 ret = GST_VIDEO_ENCODER_CLASS (parent_class)->sink_event (encoder, event);
1025 case GST_EVENT_FLUSH_START:
1026 gst_pad_stop_task (encoder->srcpad);
1027 GST_DEBUG_OBJECT (self, "flush start done");
1035 static GstStateChangeReturn
1036 gst_v4l2_video_enc_change_state (GstElement * element,
1037 GstStateChange transition)
1039 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (element);
1041 if (transition == GST_STATE_CHANGE_PAUSED_TO_READY) {
1042 g_atomic_int_set (&self->active, FALSE);
1043 gst_v4l2_object_unlock (self->v4l2output);
1044 gst_v4l2_object_unlock (self->v4l2capture);
1047 return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1052 gst_v4l2_video_enc_dispose (GObject * object)
1054 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (object);
1056 gst_caps_replace (&self->probed_sinkcaps, NULL);
1057 gst_caps_replace (&self->probed_srccaps, NULL);
1059 G_OBJECT_CLASS (parent_class)->dispose (object);
1063 gst_v4l2_video_enc_finalize (GObject * object)
1065 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (object);
1067 gst_v4l2_object_destroy (self->v4l2capture);
1068 gst_v4l2_object_destroy (self->v4l2output);
1070 G_OBJECT_CLASS (parent_class)->finalize (object);
1075 gst_v4l2_video_enc_init (GstV4l2VideoEnc * self)
1077 /* V4L2 object are created in subinstance_init */
1081 gst_v4l2_video_enc_subinstance_init (GTypeInstance * instance, gpointer g_class)
1083 GstV4l2VideoEncClass *klass = GST_V4L2_VIDEO_ENC_CLASS (g_class);
1084 GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (instance);
1086 self->v4l2output = gst_v4l2_object_new (GST_ELEMENT (self),
1087 GST_OBJECT (GST_VIDEO_ENCODER_SINK_PAD (self)),
1088 V4L2_BUF_TYPE_VIDEO_OUTPUT, klass->default_device,
1089 gst_v4l2_get_output, gst_v4l2_set_output, NULL);
1090 self->v4l2output->no_initial_format = TRUE;
1091 self->v4l2output->keep_aspect = FALSE;
1093 self->v4l2capture = gst_v4l2_object_new (GST_ELEMENT (self),
1094 GST_OBJECT (GST_VIDEO_ENCODER_SRC_PAD (self)),
1095 V4L2_BUF_TYPE_VIDEO_CAPTURE, klass->default_device,
1096 gst_v4l2_get_input, gst_v4l2_set_input, NULL);
1100 gst_v4l2_video_enc_class_init (GstV4l2VideoEncClass * klass)
1102 GstElementClass *element_class;
1103 GObjectClass *gobject_class;
1104 GstVideoEncoderClass *video_encoder_class;
1106 parent_class = g_type_class_peek_parent (klass);
1108 element_class = (GstElementClass *) klass;
1109 gobject_class = (GObjectClass *) klass;
1110 video_encoder_class = (GstVideoEncoderClass *) klass;
1112 GST_DEBUG_CATEGORY_INIT (gst_v4l2_video_enc_debug, "v4l2videoenc", 0,
1113 "V4L2 Video Encoder");
1115 gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_dispose);
1116 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_finalize);
1117 gobject_class->set_property =
1118 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_set_property);
1119 gobject_class->get_property =
1120 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_get_property);
1122 video_encoder_class->open = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_open);
1123 video_encoder_class->close = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_close);
1124 video_encoder_class->start = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_start);
1125 video_encoder_class->stop = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_stop);
1126 video_encoder_class->finish = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_finish);
1127 video_encoder_class->flush = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_flush);
1128 video_encoder_class->set_format =
1129 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_set_format);
1130 video_encoder_class->negotiate =
1131 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_negotiate);
1132 video_encoder_class->decide_allocation =
1133 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_decide_allocation);
1134 video_encoder_class->propose_allocation =
1135 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_propose_allocation);
1136 video_encoder_class->sink_query =
1137 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_sink_query);
1138 video_encoder_class->src_query =
1139 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_src_query);
1140 video_encoder_class->sink_event =
1141 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_sink_event);
1142 video_encoder_class->handle_frame =
1143 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_handle_frame);
1145 element_class->change_state =
1146 GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_change_state);
1148 gst_v4l2_object_install_m2m_properties_helper (gobject_class);
1152 gst_v4l2_video_enc_subclass_init (gpointer g_class, gpointer data)
1154 GstV4l2VideoEncClass *klass = GST_V4L2_VIDEO_ENC_CLASS (g_class);
1155 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
1156 GstV4l2VideoEncCData *cdata = data;
1158 klass->default_device = cdata->device;
1159 klass->codec = cdata->codec;
1161 gst_element_class_add_pad_template (element_class,
1162 gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
1164 gst_element_class_add_pad_template (element_class,
1165 gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
1168 gst_caps_unref (cdata->sink_caps);
1169 gst_caps_unref (cdata->src_caps);
1173 /* Probing functions */
1175 gst_v4l2_is_video_enc (GstCaps * sink_caps, GstCaps * src_caps,
1176 GstCaps * codec_caps)
1178 gboolean ret = FALSE;
1179 gboolean (*check_caps) (const GstCaps *, const GstCaps *);
1182 check_caps = gst_caps_can_intersect;
1184 codec_caps = gst_v4l2_object_get_codec_caps ();
1185 check_caps = gst_caps_is_subset;
1188 if (gst_caps_is_subset (sink_caps, gst_v4l2_object_get_raw_caps ())
1189 && check_caps (src_caps, codec_caps))
1196 gst_v4l2_video_enc_register (GstPlugin * plugin, GType type,
1197 const char *codec_name, const gchar * basename, const gchar * device_path,
1198 const GstV4l2Codec * codec, gint video_fd, GstCaps * sink_caps,
1199 GstCaps * codec_caps, GstCaps * src_caps)
1201 GstCaps *filtered_caps;
1202 GTypeQuery type_query;
1203 GTypeInfo type_info = { 0, };
1206 GstV4l2VideoEncCData *cdata;
1207 GValue value = G_VALUE_INIT;
1209 filtered_caps = gst_caps_intersect (src_caps, codec_caps);
1211 if (codec != NULL && video_fd != -1) {
1212 if (gst_v4l2_codec_probe_levels (codec, video_fd, &value)) {
1213 gst_caps_set_value (filtered_caps, "level", &value);
1214 g_value_unset (&value);
1217 if (gst_v4l2_codec_probe_profiles (codec, video_fd, &value)) {
1218 gst_caps_set_value (filtered_caps, "profile", &value);
1219 g_value_unset (&value);
1223 cdata = g_new0 (GstV4l2VideoEncCData, 1);
1224 cdata->device = g_strdup (device_path);
1225 cdata->sink_caps = gst_caps_ref (sink_caps);
1226 cdata->src_caps = gst_caps_ref (filtered_caps);
1227 cdata->codec = codec;
1229 g_type_query (type, &type_query);
1230 memset (&type_info, 0, sizeof (type_info));
1231 type_info.class_size = type_query.class_size;
1232 type_info.instance_size = type_query.instance_size;
1233 type_info.class_init = gst_v4l2_video_enc_subclass_init;
1234 type_info.class_data = cdata;
1235 type_info.instance_init = gst_v4l2_video_enc_subinstance_init;
1237 /* The first encoder to be registered should use a constant name, like
1238 * v4l2h264enc, for any additional encoders, we create unique names. Encoder
1239 * names may change between boots, so this should help gain stable names for
1240 * the most common use cases. */
1241 type_name = g_strdup_printf ("v4l2%senc", codec_name);
1243 if (g_type_from_name (type_name) != 0) {
1245 type_name = g_strdup_printf ("v4l2%s%senc", basename, codec_name);
1248 subtype = g_type_register_static (type, type_name, &type_info, 0);
1250 if (!gst_element_register (plugin, type_name, GST_RANK_PRIMARY + 1, subtype))
1251 GST_WARNING ("Failed to register plugin '%s'", type_name);