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gstreamer/omx/gstomxvideodec.c
George Kiagiadakis 158775f497 Implement a new custom recursive mutex type and fix locking in callbacks so that in-context calls are allowed. 
According to the OMX specification, implementations are allowed to call
callbacks in the context of their function calls. However, our callbacks
take locks and this causes deadlocks if the unerlying OMX implementation
uses this kind of in-context calls.

A solution to the problem would be a recursive mutex. However, a normal
recursive mutex does not fix the problem because it is not guaranteed
that the callbacks are called from the same thread. What we see in Broadcom's
implementation for example is:

- OMX_Foo is called
- OMX_Foo waits on a condition
- A callback is executed in a different thread
- When the callback returns, its calling function
  signals the condition that OMX_Foo waits on
- OMX_Foo wakes up and returns

The solution I came up with here is to take a second lock inside the callback,
but only if recursion is expected to happen. Therefore, all calls to OMX
functions are guarded by calls to gst_omx_rec_mutex_begin_recursion() / _end_recursion(),
which effectively tells the mutex that at this point we want to allow calls
to _recursive_lock() to succeed, although we are still holding the master lock.
2012-05-07 17:01:16 +03:00

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/*
* Copyright (C) 2011, Hewlett-Packard Development Company, L.P.
* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>, Collabora Ltd.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <string.h>
#include "gstomxvideodec.h"
GST_DEBUG_CATEGORY_STATIC (gst_omx_video_dec_debug_category);
#define GST_CAT_DEFAULT gst_omx_video_dec_debug_category
typedef struct _BufferIdentification BufferIdentification;
struct _BufferIdentification
{
guint64 timestamp;
};
static void
buffer_identification_free (BufferIdentification * id)
{
g_slice_free (BufferIdentification, id);
}
/* prototypes */
static void gst_omx_video_dec_finalize (GObject * object);
static GstStateChangeReturn
gst_omx_video_dec_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_omx_video_dec_start (GstBaseVideoDecoder * decoder);
static gboolean gst_omx_video_dec_stop (GstBaseVideoDecoder * decoder);
static gboolean gst_omx_video_dec_set_format (GstBaseVideoDecoder * decoder,
GstVideoState * state);
static gboolean gst_omx_video_dec_reset (GstBaseVideoDecoder * decoder);
static GstFlowReturn gst_omx_video_dec_parse_data (GstBaseVideoDecoder *
decoder, gboolean at_eos);
static GstFlowReturn gst_omx_video_dec_handle_frame (GstBaseVideoDecoder *
decoder, GstVideoFrameState * frame);
static GstFlowReturn gst_omx_video_dec_finish (GstBaseVideoDecoder * decoder);
static GstFlowReturn gst_omx_video_dec_drain (GstOMXVideoDec * self);
enum
{
PROP_0
};
/* class initialization */
#define DEBUG_INIT \
GST_DEBUG_CATEGORY_INIT (gst_omx_video_dec_debug_category, "omxvideodec", 0, \
"debug category for gst-omx video decoder base class");
G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GstOMXVideoDec, gst_omx_video_dec,
GST_TYPE_BASE_VIDEO_DECODER, DEBUG_INIT);
static void
gst_omx_video_dec_class_init (GstOMXVideoDecClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GstBaseVideoDecoderClass *base_video_decoder_class =
GST_BASE_VIDEO_DECODER_CLASS (klass);
gobject_class->finalize = gst_omx_video_dec_finalize;
element_class->change_state =
GST_DEBUG_FUNCPTR (gst_omx_video_dec_change_state);
base_video_decoder_class->start = GST_DEBUG_FUNCPTR (gst_omx_video_dec_start);
base_video_decoder_class->stop = GST_DEBUG_FUNCPTR (gst_omx_video_dec_stop);
base_video_decoder_class->reset = GST_DEBUG_FUNCPTR (gst_omx_video_dec_reset);
base_video_decoder_class->set_format =
GST_DEBUG_FUNCPTR (gst_omx_video_dec_set_format);
base_video_decoder_class->parse_data =
GST_DEBUG_FUNCPTR (gst_omx_video_dec_parse_data);
base_video_decoder_class->handle_frame =
GST_DEBUG_FUNCPTR (gst_omx_video_dec_handle_frame);
base_video_decoder_class->finish =
GST_DEBUG_FUNCPTR (gst_omx_video_dec_finish);
klass->cdata.default_src_template_caps = "video/x-raw, "
"width = " GST_VIDEO_SIZE_RANGE ", "
"height = " GST_VIDEO_SIZE_RANGE ", " "framerate = " GST_VIDEO_FPS_RANGE;
}
static void
gst_omx_video_dec_init (GstOMXVideoDec * self)
{
GST_BASE_VIDEO_DECODER (self)->packetized = TRUE;
self->drain_lock = g_mutex_new ();
self->drain_cond = g_cond_new ();
}
static gboolean
gst_omx_video_dec_open (GstOMXVideoDec * self)
{
GstOMXVideoDecClass *klass = GST_OMX_VIDEO_DEC_GET_CLASS (self);
GST_DEBUG_OBJECT (self, "Opening decoder");
self->component =
gst_omx_component_new (GST_OBJECT_CAST (self), &klass->cdata);
self->started = FALSE;
if (!self->component)
return FALSE;
if (gst_omx_component_get_state (self->component,
GST_CLOCK_TIME_NONE) != OMX_StateLoaded)
return FALSE;
self->in_port =
gst_omx_component_add_port (self->component, klass->cdata.in_port_index);
self->out_port =
gst_omx_component_add_port (self->component, klass->cdata.out_port_index);
if (!self->in_port || !self->out_port)
return FALSE;
GST_DEBUG_OBJECT (self, "Opened decoder");
return TRUE;
}
static gboolean
gst_omx_video_dec_shutdown (GstOMXVideoDec * self)
{
OMX_STATETYPE state;
GST_DEBUG_OBJECT (self, "Shutting down decoder");
state = gst_omx_component_get_state (self->component, 0);
if (state > OMX_StateLoaded || state == OMX_StateInvalid) {
if (state > OMX_StateIdle) {
gst_omx_component_set_state (self->component, OMX_StateIdle);
gst_omx_component_get_state (self->component, 5 * GST_SECOND);
}
gst_omx_component_set_state (self->component, OMX_StateLoaded);
gst_omx_port_deallocate_buffers (self->in_port);
gst_omx_port_deallocate_buffers (self->out_port);
if (state > OMX_StateLoaded)
gst_omx_component_get_state (self->component, 5 * GST_SECOND);
}
return TRUE;
}
static gboolean
gst_omx_video_dec_close (GstOMXVideoDec * self)
{
GST_DEBUG_OBJECT (self, "Closing decoder");
if (!gst_omx_video_dec_shutdown (self))
return FALSE;
self->in_port = NULL;
self->out_port = NULL;
if (self->component)
gst_omx_component_free (self->component);
self->component = NULL;
self->started = FALSE;
GST_DEBUG_OBJECT (self, "Closed decoder");
return TRUE;
}
static void
gst_omx_video_dec_finalize (GObject * object)
{
GstOMXVideoDec *self = GST_OMX_VIDEO_DEC (object);
g_mutex_free (self->drain_lock);
g_cond_free (self->drain_cond);
G_OBJECT_CLASS (gst_omx_video_dec_parent_class)->finalize (object);
}
static GstStateChangeReturn
gst_omx_video_dec_change_state (GstElement * element, GstStateChange transition)
{
GstOMXVideoDec *self;
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
g_return_val_if_fail (GST_IS_OMX_VIDEO_DEC (element),
GST_STATE_CHANGE_FAILURE);
self = GST_OMX_VIDEO_DEC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_omx_video_dec_open (self))
ret = GST_STATE_CHANGE_FAILURE;
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
if (self->in_port)
gst_omx_port_set_flushing (self->in_port, FALSE);
if (self->out_port)
gst_omx_port_set_flushing (self->out_port, FALSE);
self->downstream_flow_ret = GST_FLOW_OK;
self->draining = FALSE;
self->started = FALSE;
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (self->in_port)
gst_omx_port_set_flushing (self->in_port, TRUE);
if (self->out_port)
gst_omx_port_set_flushing (self->out_port, TRUE);
g_mutex_lock (self->drain_lock);
self->draining = FALSE;
g_cond_broadcast (self->drain_cond);
g_mutex_unlock (self->drain_lock);
break;
default:
break;
}
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
ret =
GST_ELEMENT_CLASS (gst_omx_video_dec_parent_class)->change_state (element,
transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
self->downstream_flow_ret = GST_FLOW_FLUSHING;
self->started = FALSE;
if (!gst_omx_video_dec_shutdown (self))
ret = GST_STATE_CHANGE_FAILURE;
break;
case GST_STATE_CHANGE_READY_TO_NULL:
if (!gst_omx_video_dec_close (self))
ret = GST_STATE_CHANGE_FAILURE;
break;
default:
break;
}
return ret;
}
#define MAX_FRAME_DIST_TICKS (5 * OMX_TICKS_PER_SECOND)
#define MAX_FRAME_DIST_FRAMES (100)
static GstVideoFrameState *
_find_nearest_frame (GstOMXVideoDec * self, GstOMXBuffer * buf)
{
GList *l, *best_l = NULL;
GList *finish_frames = NULL;
GstVideoFrameState *best = NULL;
guint64 best_timestamp = 0;
guint64 best_diff = G_MAXUINT64;
BufferIdentification *best_id = NULL;
for (l = GST_BASE_VIDEO_CODEC (self)->frames; l; l = l->next) {
GstVideoFrameState *tmp = l->data;
BufferIdentification *id = tmp->coder_hook;
guint64 timestamp, diff;
/* This happens for frames that were just added but
* which were not passed to the component yet. Ignore
* them here!
*/
if (!id)
continue;
timestamp = id->timestamp;
if (timestamp > buf->omx_buf->nTimeStamp)
diff = timestamp - buf->omx_buf->nTimeStamp;
else
diff = buf->omx_buf->nTimeStamp - timestamp;
if (best == NULL || diff < best_diff) {
best = tmp;
best_timestamp = timestamp;
best_diff = diff;
best_l = l;
best_id = id;
/* For frames without timestamp we simply take the first frame */
if ((buf->omx_buf->nTimeStamp == 0 && timestamp == 0) || diff == 0)
break;
}
}
if (best_id) {
for (l = GST_BASE_VIDEO_CODEC (self)->frames; l && l != best_l; l = l->next) {
GstVideoFrameState *tmp = l->data;
BufferIdentification *id = tmp->coder_hook;
guint64 diff_ticks, diff_frames;
if (id->timestamp > best_timestamp)
break;
if (id->timestamp == 0 || best_timestamp == 0)
diff_ticks = 0;
else
diff_ticks = best_timestamp - id->timestamp;
diff_frames = best->system_frame_number - tmp->system_frame_number;
if (diff_ticks > MAX_FRAME_DIST_TICKS
|| diff_frames > MAX_FRAME_DIST_FRAMES) {
finish_frames = g_list_prepend (finish_frames, tmp);
}
}
}
if (finish_frames) {
g_warning ("Too old frames, bug in decoder -- please file a bug");
for (l = finish_frames; l; l = l->next) {
gst_base_video_decoder_finish_frame (GST_BASE_VIDEO_DECODER (self),
l->data);
}
}
return best;
}
static gboolean
gst_omx_video_dec_fill_buffer (GstOMXVideoDec * self, GstOMXBuffer * inbuf,
GstBuffer * outbuf)
{
GstVideoState *state = &GST_BASE_VIDEO_CODEC (self)->state;
OMX_PARAM_PORTDEFINITIONTYPE *port_def = &self->out_port->port_def;
gboolean ret = FALSE;
GstVideoInfo vinfo;
GstVideoFrame frame;
if (state->width != port_def->format.video.nFrameWidth ||
state->height != port_def->format.video.nFrameHeight) {
GST_ERROR_OBJECT (self, "Width or height do not match");
goto done;
}
/* Same strides and everything */
if (gst_buffer_get_size (outbuf) == inbuf->omx_buf->nFilledLen) {
GstMapInfo map = GST_MAP_INFO_INIT;
gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
memcpy (map.data,
inbuf->omx_buf->pBuffer + inbuf->omx_buf->nOffset,
inbuf->omx_buf->nFilledLen);
gst_buffer_unmap (outbuf, &map);
ret = TRUE;
goto done;
}
/* Different strides */
gst_video_info_from_caps (&vinfo, state->caps);
switch (state->format) {
case GST_VIDEO_FORMAT_I420:{
gint i, j, height;
guint8 *src, *dest;
gint src_stride, dest_stride;
for (i = 0; i < 3; i++) {
if (i == 0) {
src_stride = port_def->format.video.nStride;
dest_stride = vinfo.stride[0];
/* XXX: Try this if no stride was set */
if (src_stride == 0)
src_stride = dest_stride;
} else {
src_stride = port_def->format.video.nStride / 2;
dest_stride = vinfo.stride[1];
/* XXX: Try this if no stride was set */
if (src_stride == 0)
src_stride = dest_stride;
}
src = inbuf->omx_buf->pBuffer + inbuf->omx_buf->nOffset;
if (i > 0)
src +=
port_def->format.video.nSliceHeight *
port_def->format.video.nStride;
if (i == 2)
src +=
(port_def->format.video.nSliceHeight / 2) *
(port_def->format.video.nStride / 2);
gst_video_frame_map (&frame, &vinfo, outbuf, GST_MAP_WRITE);
dest = GST_VIDEO_FRAME_COMP_DATA (&frame, i);
height = GST_VIDEO_FRAME_HEIGHT (&frame);
for (j = 0; j < height; j++) {
memcpy (dest, src, MIN (src_stride, dest_stride));
src += src_stride;
dest += dest_stride;
}
gst_video_frame_unmap (&frame);
}
ret = TRUE;
break;
}
case GST_VIDEO_FORMAT_NV12:{
gint i, j, height;
guint8 *src, *dest;
gint src_stride, dest_stride;
for (i = 0; i < 2; i++) {
if (i == 0) {
src_stride = port_def->format.video.nStride;
dest_stride = vinfo.stride[0];
/* XXX: Try this if no stride was set */
if (src_stride == 0)
src_stride = dest_stride;
} else {
src_stride = port_def->format.video.nStride;
dest_stride = vinfo.stride[1];
/* XXX: Try this if no stride was set */
if (src_stride == 0)
src_stride = dest_stride;
}
src = inbuf->omx_buf->pBuffer + inbuf->omx_buf->nOffset;
if (i == 1)
src +=
port_def->format.video.nSliceHeight *
port_def->format.video.nStride;
gst_video_frame_map (&frame, &vinfo, outbuf, GST_MAP_WRITE);
dest = GST_VIDEO_FRAME_COMP_DATA (&frame, i);
height = GST_VIDEO_FRAME_HEIGHT (&frame);
for (j = 0; j < height; j++) {
memcpy (dest, src, MIN (src_stride, dest_stride));
src += src_stride;
dest += dest_stride;
}
gst_video_frame_unmap (&frame);
}
ret = TRUE;
break;
}
default:
GST_ERROR_OBJECT (self, "Unsupported format");
goto done;
break;
}
done:
if (ret) {
GST_BUFFER_PTS (outbuf) =
gst_util_uint64_scale (inbuf->omx_buf->nTimeStamp, GST_SECOND,
OMX_TICKS_PER_SECOND);
if (inbuf->omx_buf->nTickCount != 0)
GST_BUFFER_DURATION (outbuf) =
gst_util_uint64_scale (inbuf->omx_buf->nTickCount, GST_SECOND,
OMX_TICKS_PER_SECOND);
}
return ret;
}
static void
gst_omx_video_dec_loop (GstOMXVideoDec * self)
{
GstOMXVideoDecClass *klass;
GstOMXPort *port = self->out_port;
GstOMXBuffer *buf = NULL;
GstVideoFrameState *frame;
GstFlowReturn flow_ret = GST_FLOW_OK;
GstOMXAcquireBufferReturn acq_return;
GstClockTimeDiff deadline;
gboolean is_eos;
klass = GST_OMX_VIDEO_DEC_GET_CLASS (self);
acq_return = gst_omx_port_acquire_buffer (port, &buf);
if (acq_return == GST_OMX_ACQUIRE_BUFFER_ERROR) {
goto component_error;
} else if (acq_return == GST_OMX_ACQUIRE_BUFFER_FLUSHING) {
goto flushing;
} else if (acq_return == GST_OMX_ACQUIRE_BUFFER_RECONFIGURE) {
if (gst_omx_port_reconfigure (self->out_port) != OMX_ErrorNone)
goto reconfigure_error;
/* And restart the loop */
return;
}
if (!gst_pad_has_current_caps (GST_BASE_VIDEO_CODEC_SRC_PAD (self))
|| acq_return == GST_OMX_ACQUIRE_BUFFER_RECONFIGURED) {
GstVideoState *state = &GST_BASE_VIDEO_CODEC (self)->state;
OMX_PARAM_PORTDEFINITIONTYPE port_def;
GST_DEBUG_OBJECT (self, "Port settings have changed, updating caps");
GST_BASE_VIDEO_CODEC_STREAM_LOCK (self);
gst_omx_port_get_port_definition (port, &port_def);
g_assert (port_def.format.video.eCompressionFormat ==
OMX_VIDEO_CodingUnused);
switch (port_def.format.video.eColorFormat) {
case OMX_COLOR_FormatYUV420Planar:
state->format = GST_VIDEO_FORMAT_I420;
break;
case OMX_COLOR_FormatYUV420SemiPlanar:
state->format = GST_VIDEO_FORMAT_NV12;
break;
default:
GST_ERROR_OBJECT (self, "Unsupported color format: %d",
port_def.format.video.eColorFormat);
if (buf)
gst_omx_port_release_buffer (self->out_port, buf);
GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (self);
goto caps_failed;
break;
}
state->width = port_def.format.video.nFrameWidth;
state->height = port_def.format.video.nFrameHeight;
/* Take framerate and pixel-aspect-ratio from sinkpad caps */
if (!gst_base_video_decoder_set_src_caps (GST_BASE_VIDEO_DECODER (self))) {
if (buf)
gst_omx_port_release_buffer (self->out_port, buf);
GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (self);
goto caps_failed;
}
GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (self);
/* Now get a buffer */
if (acq_return != GST_OMX_ACQUIRE_BUFFER_OK)
return;
}
g_assert (acq_return == GST_OMX_ACQUIRE_BUFFER_OK);
if (buf) {
GST_DEBUG_OBJECT (self, "Handling buffer: 0x%08x %lu", buf->omx_buf->nFlags,
buf->omx_buf->nTimeStamp);
/* This prevents a deadlock between the srcpad stream
* lock and the videocodec stream lock, if ::reset()
* is called at the wrong time
*/
if (gst_omx_port_is_flushing (self->out_port)) {
GST_DEBUG_OBJECT (self, "Flushing");
gst_omx_port_release_buffer (self->out_port, buf);
goto flushing;
}
GST_BASE_VIDEO_CODEC_STREAM_LOCK (self);
frame = _find_nearest_frame (self, buf);
is_eos = ! !(buf->omx_buf->nFlags & OMX_BUFFERFLAG_EOS);
if (frame
&& (deadline = gst_base_video_decoder_get_max_decode_time
(GST_BASE_VIDEO_DECODER (self), frame)) < 0) {
GST_WARNING_OBJECT (self,
"Frame is too late, dropping (deadline %" GST_TIME_FORMAT ")",
GST_TIME_ARGS (-deadline));
flow_ret =
gst_base_video_decoder_drop_frame (GST_BASE_VIDEO_DECODER (self),
frame);
} else if (!frame && buf->omx_buf->nFilledLen > 0) {
GstBuffer *outbuf;
/* This sometimes happens at EOS or if the input is not properly framed,
* let's handle it gracefully by allocating a new buffer for the current
* caps and filling it
*/
GST_ERROR_OBJECT (self, "No corresponding frame found");
outbuf =
gst_base_video_decoder_alloc_src_buffer (GST_BASE_VIDEO_DECODER
(self));
if (!gst_omx_video_dec_fill_buffer (self, buf, outbuf)) {
gst_buffer_unref (outbuf);
gst_omx_port_release_buffer (self->out_port, buf);
goto invalid_buffer;
}
flow_ret = gst_pad_push (GST_BASE_VIDEO_CODEC_SRC_PAD (self), outbuf);
} else if (buf->omx_buf->nFilledLen > 0) {
if (GST_BASE_VIDEO_CODEC (self)->state.bytes_per_picture == 0) {
/* FIXME: If the sinkpad caps change we have currently no way
* to allocate new src buffers because basevideodecoder assumes
* that the caps on both pads are equivalent all the time
*/
GST_WARNING_OBJECT (self,
"Caps change pending and still have buffers for old caps -- dropping");
} else
if (gst_base_video_decoder_alloc_src_frame (GST_BASE_VIDEO_DECODER
(self), frame) == GST_FLOW_OK) {
/* FIXME: This currently happens because of a race condition too.
* We first need to reconfigure the output port and then the input
* port if both need reconfiguration.
*/
if (!gst_omx_video_dec_fill_buffer (self, buf, frame->src_buffer)) {
gst_buffer_replace (&frame->src_buffer, NULL);
flow_ret =
gst_base_video_decoder_finish_frame (GST_BASE_VIDEO_DECODER
(self), frame);
gst_omx_port_release_buffer (self->out_port, buf);
goto invalid_buffer;
}
}
flow_ret =
gst_base_video_decoder_finish_frame (GST_BASE_VIDEO_DECODER (self),
frame);
} else if (frame != NULL) {
flow_ret =
gst_base_video_decoder_finish_frame (GST_BASE_VIDEO_DECODER (self),
frame);
}
if (is_eos || flow_ret == GST_FLOW_EOS) {
g_mutex_lock (self->drain_lock);
if (self->draining) {
GST_DEBUG_OBJECT (self, "Drained");
self->draining = FALSE;
g_cond_broadcast (self->drain_cond);
} else if (flow_ret == GST_FLOW_OK) {
GST_DEBUG_OBJECT (self, "Component signalled EOS");
flow_ret = GST_FLOW_EOS;
}
g_mutex_unlock (self->drain_lock);
} else {
GST_DEBUG_OBJECT (self, "Finished frame: %s",
gst_flow_get_name (flow_ret));
}
gst_omx_port_release_buffer (port, buf);
self->downstream_flow_ret = flow_ret;
} else {
g_assert ((klass->cdata.hacks & GST_OMX_HACK_NO_EMPTY_EOS_BUFFER));
GST_BASE_VIDEO_CODEC_STREAM_LOCK (self);
flow_ret = GST_FLOW_EOS;
}
if (flow_ret != GST_FLOW_OK)
goto flow_error;
GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (self);
return;
component_error:
{
GST_ELEMENT_ERROR (self, LIBRARY, FAILED, (NULL),
("OpenMAX component in error state %s (0x%08x)",
gst_omx_component_get_last_error_string (self->component),
gst_omx_component_get_last_error (self->component)));
gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (self),
gst_event_new_eos ());
gst_pad_pause_task (GST_BASE_VIDEO_CODEC_SRC_PAD (self));
self->downstream_flow_ret = GST_FLOW_ERROR;
self->started = FALSE;
return;
}
flushing:
{
GST_DEBUG_OBJECT (self, "Flushing -- stopping task");
gst_pad_pause_task (GST_BASE_VIDEO_CODEC_SRC_PAD (self));
self->downstream_flow_ret = GST_FLOW_FLUSHING;
self->started = FALSE;
return;
}
flow_error:
{
if (flow_ret == GST_FLOW_EOS) {
GST_DEBUG_OBJECT (self, "EOS");
gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (self),
gst_event_new_eos ());
gst_pad_pause_task (GST_BASE_VIDEO_CODEC_SRC_PAD (self));
} else if (flow_ret == GST_FLOW_NOT_LINKED || flow_ret < GST_FLOW_EOS) {
GST_ELEMENT_ERROR (self, STREAM, FAILED, ("Internal data stream error."),
("stream stopped, reason %s", gst_flow_get_name (flow_ret)));
gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (self),
gst_event_new_eos ());
gst_pad_pause_task (GST_BASE_VIDEO_CODEC_SRC_PAD (self));
}
self->started = FALSE;
GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (self);
return;
}
reconfigure_error:
{
GST_ELEMENT_ERROR (self, LIBRARY, SETTINGS, (NULL),
("Unable to reconfigure output port"));
gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (self),
gst_event_new_eos ());
gst_pad_pause_task (GST_BASE_VIDEO_CODEC_SRC_PAD (self));
self->downstream_flow_ret = GST_FLOW_ERROR;
self->started = FALSE;
return;
}
invalid_buffer:
{
GST_ELEMENT_ERROR (self, LIBRARY, SETTINGS, (NULL),
("Invalid sized input buffer"));
gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (self),
gst_event_new_eos ());
gst_pad_pause_task (GST_BASE_VIDEO_CODEC_SRC_PAD (self));
self->downstream_flow_ret = GST_FLOW_NOT_NEGOTIATED;
self->started = FALSE;
GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (self);
return;
}
caps_failed:
{
GST_ELEMENT_ERROR (self, LIBRARY, SETTINGS, (NULL), ("Failed to set caps"));
gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (self),
gst_event_new_eos ());
gst_pad_pause_task (GST_BASE_VIDEO_CODEC_SRC_PAD (self));
self->downstream_flow_ret = GST_FLOW_NOT_NEGOTIATED;
self->started = FALSE;
return;
}
}
static gboolean
gst_omx_video_dec_start (GstBaseVideoDecoder * decoder)
{
GstOMXVideoDec *self;
gboolean ret;
self = GST_OMX_VIDEO_DEC (decoder);
self->last_upstream_ts = 0;
self->eos = FALSE;
self->downstream_flow_ret = GST_FLOW_OK;
ret =
gst_pad_start_task (GST_BASE_VIDEO_CODEC_SRC_PAD (self),
(GstTaskFunction) gst_omx_video_dec_loop, self);
return ret;
}
static gboolean
gst_omx_video_dec_stop (GstBaseVideoDecoder * decoder)
{
GstOMXVideoDec *self;
self = GST_OMX_VIDEO_DEC (decoder);
GST_DEBUG_OBJECT (self, "Stopping decoder");
gst_omx_port_set_flushing (self->in_port, TRUE);
gst_omx_port_set_flushing (self->out_port, TRUE);
gst_pad_stop_task (GST_BASE_VIDEO_CODEC_SRC_PAD (decoder));
if (gst_omx_component_get_state (self->component, 0) > OMX_StateIdle)
gst_omx_component_set_state (self->component, OMX_StateIdle);
self->downstream_flow_ret = GST_FLOW_FLUSHING;
self->started = FALSE;
self->eos = FALSE;
g_mutex_lock (self->drain_lock);
self->draining = FALSE;
g_cond_broadcast (self->drain_cond);
g_mutex_unlock (self->drain_lock);
gst_omx_component_get_state (self->component, 5 * GST_SECOND);
gst_buffer_replace (&self->codec_data, NULL);
GST_DEBUG_OBJECT (self, "Stopped decoder");
return TRUE;
}
static gboolean
gst_omx_video_dec_negotiate (GstOMXVideoDec * self)
{
GstOMXPort *port = self->out_port;
GstVideoState *state = &GST_BASE_VIDEO_CODEC (self)->state;
OMX_VIDEO_PARAM_PORTFORMATTYPE param;
OMX_ERRORTYPE err;
GstCaps *comp_supported_caps;
GstCaps *templ_caps;
GstCaps *peer_caps, *intersection;
GstVideoFormat format;
gint old_index;
GstStructure *s;
const gchar *format_str;
templ_caps =
gst_caps_copy (gst_pad_get_pad_template_caps (GST_BASE_VIDEO_CODEC_SRC_PAD
(self)));
peer_caps =
gst_pad_peer_query_caps (GST_BASE_VIDEO_CODEC_SRC_PAD (self), templ_caps);
if (peer_caps) {
intersection = peer_caps;
gst_caps_unref (templ_caps);
} else {
intersection = templ_caps;
}
GST_OMX_INIT_STRUCT (&param);
param.nPortIndex = port->index;
param.nIndex = 0;
if (state->fps_n == 0)
param.xFramerate = 0;
else
param.xFramerate = (state->fps_n << 16) / (state->fps_d);
old_index = -1;
comp_supported_caps = gst_caps_new_empty ();
do {
err =
gst_omx_component_get_parameter (self->component,
OMX_IndexParamVideoPortFormat, &param);
/* FIXME: Workaround for Bellagio that simply always
* returns the same value regardless of nIndex and
* never returns OMX_ErrorNoMore
*/
if (old_index == param.nIndex)
break;
if (err == OMX_ErrorNone) {
switch (param.eColorFormat) {
case OMX_COLOR_FormatYUV420Planar:
gst_caps_append_structure (comp_supported_caps,
gst_structure_new ("video/x-raw",
"format", G_TYPE_STRING, "I420", NULL));
break;
case OMX_COLOR_FormatYUV420SemiPlanar:
gst_caps_append_structure (comp_supported_caps,
gst_structure_new ("video/x-raw",
"format", G_TYPE_STRING, "NV12", NULL));
break;
default:
break;
}
}
old_index = param.nIndex++;
} while (err == OMX_ErrorNone);
if (!gst_caps_is_empty (comp_supported_caps)) {
GstCaps *tmp;
tmp = gst_caps_intersect (comp_supported_caps, intersection);
gst_caps_unref (intersection);
intersection = tmp;
}
if (gst_caps_is_empty (intersection)) {
gst_caps_unref (intersection);
GST_ERROR_OBJECT (self, "Empty caps");
return FALSE;
}
intersection = gst_caps_truncate (intersection);
s = gst_caps_get_structure (intersection, 0);
format_str = gst_structure_get_string (s, "format");
if (!format_str ||
(format =
gst_video_format_from_string (format_str)) ==
GST_VIDEO_FORMAT_UNKNOWN) {
GST_ERROR_OBJECT (self, "Invalid caps: %" GST_PTR_FORMAT, intersection);
return FALSE;
}
switch (format) {
case GST_VIDEO_FORMAT_I420:
param.eColorFormat = OMX_COLOR_FormatYUV420Planar;
break;
case GST_VIDEO_FORMAT_NV12:
param.eColorFormat = OMX_COLOR_FormatYUV420SemiPlanar;
break;
default:
GST_ERROR_OBJECT (self, "Unknown color format: %u", format);
return FALSE;
break;
}
/* Reset framerate, we only care about the color format here */
param.xFramerate = 0;
err =
gst_omx_component_set_parameter (self->component,
OMX_IndexParamVideoPortFormat, &param);
if (err != OMX_ErrorNone) {
GST_ERROR_OBJECT (self, "Failed to set video port format: %s (0x%08x)",
gst_omx_error_to_string (err), err);
}
return (err == OMX_ErrorNone);
}
static gboolean
gst_omx_video_dec_set_format (GstBaseVideoDecoder * decoder,
GstVideoState * state)
{
GstOMXVideoDec *self;
GstOMXVideoDecClass *klass;
gboolean is_format_change = FALSE;
gboolean needs_disable = FALSE;
OMX_PARAM_PORTDEFINITIONTYPE port_def;
self = GST_OMX_VIDEO_DEC (decoder);
klass = GST_OMX_VIDEO_DEC_GET_CLASS (decoder);
GST_DEBUG_OBJECT (self, "Setting new caps %" GST_PTR_FORMAT, state->caps);
gst_omx_port_get_port_definition (self->in_port, &port_def);
/* Check if the caps change is a real format change or if only irrelevant
* parts of the caps have changed or nothing at all.
*/
is_format_change |= port_def.format.video.nFrameWidth != state->width;
is_format_change |= port_def.format.video.nFrameHeight != state->height;
is_format_change |= (port_def.format.video.xFramerate == 0
&& state->fps_n != 0)
|| (port_def.format.video.xFramerate !=
(state->fps_n << 16) / (state->fps_d));
is_format_change |= (self->codec_data != state->codec_data);
if (klass->is_format_change)
is_format_change |= klass->is_format_change (self, self->in_port, state);
needs_disable =
gst_omx_component_get_state (self->component,
GST_CLOCK_TIME_NONE) != OMX_StateLoaded;
/* If the component is not in Loaded state and a real format change happens
* we have to disable the port and re-allocate all buffers. If no real
* format change happened we can just exit here.
*/
if (needs_disable && !is_format_change) {
GST_DEBUG_OBJECT (self,
"Already running and caps did not change the format");
return TRUE;
}
if (needs_disable && is_format_change) {
gst_omx_video_dec_drain (self);
if (klass->cdata.hacks & GST_OMX_HACK_NO_COMPONENT_RECONFIGURE) {
GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (self);
gst_omx_video_dec_stop (GST_BASE_VIDEO_DECODER (self));
gst_omx_video_dec_close (self);
GST_BASE_VIDEO_CODEC_STREAM_LOCK (self);
if (!gst_omx_video_dec_open (self))
return FALSE;
needs_disable = FALSE;
} else {
if (gst_omx_port_manual_reconfigure (self->in_port,
TRUE) != OMX_ErrorNone)
return FALSE;
if (gst_omx_port_set_enabled (self->in_port, FALSE) != OMX_ErrorNone)
return FALSE;
}
}
port_def.format.video.nFrameWidth = state->width;
port_def.format.video.nFrameHeight = state->height;
if (state->fps_n == 0)
port_def.format.video.xFramerate = 0;
else
port_def.format.video.xFramerate = (state->fps_n << 16) / (state->fps_d);
if (!gst_omx_port_update_port_definition (self->in_port, &port_def))
return FALSE;
if (!gst_omx_port_update_port_definition (self->out_port, NULL))
return FALSE;
if (klass->set_format) {
if (!klass->set_format (self, self->in_port, state)) {
GST_ERROR_OBJECT (self, "Subclass failed to set the new format");
return FALSE;
}
}
gst_buffer_replace (&self->codec_data, state->codec_data);
if (!gst_omx_video_dec_negotiate (self))
return FALSE;
if (needs_disable) {
if (gst_omx_port_set_enabled (self->in_port, TRUE) != OMX_ErrorNone)
return FALSE;
if (gst_omx_port_manual_reconfigure (self->in_port, FALSE) != OMX_ErrorNone)
return FALSE;
} else {
if (gst_omx_component_set_state (self->component,
OMX_StateIdle) != OMX_ErrorNone)
return FALSE;
/* Need to allocate buffers to reach Idle state */
if (gst_omx_port_allocate_buffers (self->in_port) != OMX_ErrorNone)
return FALSE;
if (gst_omx_port_allocate_buffers (self->out_port) != OMX_ErrorNone)
return FALSE;
if (gst_omx_component_get_state (self->component,
GST_CLOCK_TIME_NONE) != OMX_StateIdle)
return FALSE;
if (gst_omx_component_set_state (self->component,
OMX_StateExecuting) != OMX_ErrorNone)
return FALSE;
if (gst_omx_component_get_state (self->component,
GST_CLOCK_TIME_NONE) != OMX_StateExecuting)
return FALSE;
}
/* Unset flushing to allow ports to accept data again */
gst_omx_port_set_flushing (self->in_port, FALSE);
gst_omx_port_set_flushing (self->out_port, FALSE);
if (gst_omx_component_get_last_error (self->component) != OMX_ErrorNone) {
GST_ERROR_OBJECT (self, "Component in error state: %s (0x%08x)",
gst_omx_component_get_last_error_string (self->component),
gst_omx_component_get_last_error (self->component));
return FALSE;
}
/* Start the srcpad loop again */
self->downstream_flow_ret = GST_FLOW_OK;
gst_pad_start_task (GST_BASE_VIDEO_CODEC_SRC_PAD (self),
(GstTaskFunction) gst_omx_video_dec_loop, decoder);
return TRUE;
}
static gboolean
gst_omx_video_dec_reset (GstBaseVideoDecoder * decoder)
{
GstOMXVideoDec *self;
self = GST_OMX_VIDEO_DEC (decoder);
GST_DEBUG_OBJECT (self, "Resetting decoder");
gst_omx_video_dec_drain (self);
gst_omx_port_set_flushing (self->in_port, TRUE);
gst_omx_port_set_flushing (self->out_port, TRUE);
/* Wait until the srcpad loop is finished,
* unlock GST_BASE_VIDEO_CODEC_STREAM_LOCK to prevent deadlocks
* caused by using this lock from inside the loop function */
GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (self);
GST_PAD_STREAM_LOCK (GST_BASE_VIDEO_CODEC_SRC_PAD (self));
GST_PAD_STREAM_UNLOCK (GST_BASE_VIDEO_CODEC_SRC_PAD (self));
GST_BASE_VIDEO_CODEC_STREAM_LOCK (self);
gst_omx_port_set_flushing (self->in_port, FALSE);
gst_omx_port_set_flushing (self->out_port, FALSE);
/* Start the srcpad loop again */
self->last_upstream_ts = 0;
self->eos = FALSE;
self->downstream_flow_ret = GST_FLOW_OK;
gst_pad_start_task (GST_BASE_VIDEO_CODEC_SRC_PAD (self),
(GstTaskFunction) gst_omx_video_dec_loop, decoder);
GST_DEBUG_OBJECT (self, "Reset decoder");
return TRUE;
}
static GstFlowReturn
gst_omx_video_dec_parse_data (GstBaseVideoDecoder * decoder, gboolean at_eos)
{
return GST_FLOW_OK;
}
static GstFlowReturn
gst_omx_video_dec_handle_frame (GstBaseVideoDecoder * decoder,
GstVideoFrameState * frame)
{
GstOMXAcquireBufferReturn acq_ret = GST_OMX_ACQUIRE_BUFFER_ERROR;
GstOMXVideoDec *self;
GstOMXVideoDecClass *klass;
GstOMXBuffer *buf;
GstBuffer *codec_data = NULL;
guint offset = 0;
GstClockTime timestamp, duration, timestamp_offset = 0;
self = GST_OMX_VIDEO_DEC (decoder);
klass = GST_OMX_VIDEO_DEC_GET_CLASS (self);
GST_DEBUG_OBJECT (self, "Handling frame");
if (self->eos) {
GST_WARNING_OBJECT (self, "Got frame after EOS");
return GST_FLOW_EOS;
}
timestamp = frame->presentation_timestamp;
duration = frame->presentation_duration;
if (self->downstream_flow_ret != GST_FLOW_OK) {
GST_ERROR_OBJECT (self, "Downstream returned %s",
gst_flow_get_name (self->downstream_flow_ret));
return self->downstream_flow_ret;
}
if (klass->prepare_frame) {
GstFlowReturn ret;
ret = klass->prepare_frame (self, frame);
if (ret != GST_FLOW_OK) {
GST_ERROR_OBJECT (self, "Preparing frame failed: %s",
gst_flow_get_name (ret));
return ret;
}
}
while (offset < gst_buffer_get_size (frame->sink_buffer)) {
/* Make sure to release the base class stream lock, otherwise
* _loop() can't call _finish_frame() and we might block forever
* because no input buffers are released */
GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (self);
acq_ret = gst_omx_port_acquire_buffer (self->in_port, &buf);
GST_BASE_VIDEO_CODEC_STREAM_LOCK (self);
if (acq_ret == GST_OMX_ACQUIRE_BUFFER_ERROR) {
goto component_error;
} else if (acq_ret == GST_OMX_ACQUIRE_BUFFER_FLUSHING) {
goto flushing;
} else if (acq_ret == GST_OMX_ACQUIRE_BUFFER_RECONFIGURE) {
if (gst_omx_port_reconfigure (self->in_port) != OMX_ErrorNone)
goto reconfigure_error;
/* Now get a new buffer and fill it */
continue;
} else if (acq_ret == GST_OMX_ACQUIRE_BUFFER_RECONFIGURED) {
/* TODO: Anything to do here? Don't think so */
continue;
}
g_assert (acq_ret == GST_OMX_ACQUIRE_BUFFER_OK && buf != NULL);
if (buf->omx_buf->nAllocLen - buf->omx_buf->nOffset <= 0) {
gst_omx_port_release_buffer (self->in_port, buf);
goto full_buffer;
}
if (self->downstream_flow_ret != GST_FLOW_OK) {
GST_ERROR_OBJECT (self, "Downstream returned %s",
gst_flow_get_name (self->downstream_flow_ret));
gst_omx_port_release_buffer (self->in_port, buf);
return self->downstream_flow_ret;
}
if (self->codec_data) {
codec_data = self->codec_data;
if (buf->omx_buf->nAllocLen - buf->omx_buf->nOffset <
gst_buffer_get_size (codec_data)) {
gst_omx_port_release_buffer (self->in_port, buf);
goto too_large_codec_data;
}
buf->omx_buf->nFlags |= OMX_BUFFERFLAG_CODECCONFIG;
buf->omx_buf->nFilledLen = gst_buffer_get_size (codec_data);;
gst_buffer_extract (codec_data, 0,
buf->omx_buf->pBuffer + buf->omx_buf->nOffset,
buf->omx_buf->nFilledLen);
self->started = TRUE;
gst_omx_port_release_buffer (self->in_port, buf);
gst_buffer_replace (&self->codec_data, NULL);
/* Acquire new buffer for the actual frame */
continue;
}
/* Now handle the frame */
/* Copy the buffer content in chunks of size as requested
* by the port */
gst_buffer_extract (codec_data, offset,
buf->omx_buf->pBuffer + buf->omx_buf->nOffset,
buf->omx_buf->nFilledLen);
/* Interpolate timestamps if we're passing the buffer
* in multiple chunks */
if (offset != 0 && duration != GST_CLOCK_TIME_NONE) {
timestamp_offset =
gst_util_uint64_scale (offset, duration,
gst_buffer_get_size (frame->sink_buffer));
}
if (timestamp != GST_CLOCK_TIME_NONE) {
buf->omx_buf->nTimeStamp =
gst_util_uint64_scale (timestamp + timestamp_offset,
OMX_TICKS_PER_SECOND, GST_SECOND);
self->last_upstream_ts = timestamp + timestamp_offset;
}
if (duration != GST_CLOCK_TIME_NONE) {
buf->omx_buf->nTickCount =
gst_util_uint64_scale (buf->omx_buf->nFilledLen, duration,
gst_buffer_get_size (frame->sink_buffer));
self->last_upstream_ts += duration;
}
if (offset == 0) {
BufferIdentification *id = g_slice_new0 (BufferIdentification);
if (!GST_BUFFER_FLAG_IS_SET (frame->sink_buffer,
GST_BUFFER_FLAG_DELTA_UNIT))
buf->omx_buf->nFlags |= OMX_BUFFERFLAG_SYNCFRAME;
id->timestamp = buf->omx_buf->nTimeStamp;
frame->coder_hook = id;
frame->coder_hook_destroy_notify =
(GDestroyNotify) buffer_identification_free;
}
/* TODO: Set flags
* - OMX_BUFFERFLAG_DECODEONLY for buffers that are outside
* the segment
* - OMX_BUFFERFLAG_ENDOFFRAME for parsed input
*/
offset += buf->omx_buf->nFilledLen;
self->started = TRUE;
gst_omx_port_release_buffer (self->in_port, buf);
}
return self->downstream_flow_ret;
full_buffer:
{
GST_ELEMENT_ERROR (self, LIBRARY, FAILED, (NULL),
("Got OpenMAX buffer with no free space (%p, %u/%u)", buf,
buf->omx_buf->nOffset, buf->omx_buf->nAllocLen));
return GST_FLOW_ERROR;
}
too_large_codec_data:
{
GST_ELEMENT_ERROR (self, STREAM, FORMAT, (NULL),
("codec_data larger than supported by OpenMAX port (%u > %u)",
gst_buffer_get_size (codec_data),
self->in_port->port_def.nBufferSize));
return GST_FLOW_ERROR;
}
component_error:
{
GST_ELEMENT_ERROR (self, LIBRARY, FAILED, (NULL),
("OpenMAX component in error state %s (0x%08x)",
gst_omx_component_get_last_error_string (self->component),
gst_omx_component_get_last_error (self->component)));
return GST_FLOW_ERROR;
}
flushing:
{
GST_DEBUG_OBJECT (self, "Flushing -- returning FLUSHING");
return GST_FLOW_FLUSHING;
}
reconfigure_error:
{
GST_ELEMENT_ERROR (self, LIBRARY, SETTINGS, (NULL),
("Unable to reconfigure input port"));
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
gst_omx_video_dec_finish (GstBaseVideoDecoder * decoder)
{
GstOMXVideoDec *self;
GstOMXVideoDecClass *klass;
GstOMXBuffer *buf;
GstOMXAcquireBufferReturn acq_ret;
self = GST_OMX_VIDEO_DEC (decoder);
klass = GST_OMX_VIDEO_DEC_GET_CLASS (self);
GST_DEBUG_OBJECT (self, "Sending EOS to the component");
/* Don't send EOS buffer twice, this doesn't work */
if (self->eos) {
GST_DEBUG_OBJECT (self, "Component is already EOS");
return GST_BASE_VIDEO_DECODER_FLOW_DROPPED;
}
self->eos = TRUE;
if ((klass->cdata.hacks & GST_OMX_HACK_NO_EMPTY_EOS_BUFFER)) {
GST_WARNING_OBJECT (self, "Component does not support empty EOS buffers");
/* Insert a NULL into the queue to signal EOS */
gst_omx_rec_mutex_lock (&self->out_port->port_lock);
g_queue_push_tail (self->out_port->pending_buffers, NULL);
g_cond_broadcast (self->out_port->port_cond);
gst_omx_rec_mutex_unlock (&self->out_port->port_lock);
return GST_BASE_VIDEO_DECODER_FLOW_DROPPED;
}
/* Make sure to release the base class stream lock, otherwise
* _loop() can't call _finish_frame() and we might block forever
* because no input buffers are released */
GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (self);
/* Send an EOS buffer to the component and let the base
* class drop the EOS event. We will send it later when
* the EOS buffer arrives on the output port. */
acq_ret = gst_omx_port_acquire_buffer (self->in_port, &buf);
if (acq_ret == GST_OMX_ACQUIRE_BUFFER_OK) {
buf->omx_buf->nFilledLen = 0;
buf->omx_buf->nTimeStamp =
gst_util_uint64_scale (self->last_upstream_ts, OMX_TICKS_PER_SECOND,
GST_SECOND);
buf->omx_buf->nTickCount = 0;
buf->omx_buf->nFlags |= OMX_BUFFERFLAG_EOS;
gst_omx_port_release_buffer (self->in_port, buf);
GST_DEBUG_OBJECT (self, "Sent EOS to the component");
} else {
GST_ERROR_OBJECT (self, "Failed to acquire buffer for EOS: %d", acq_ret);
}
GST_BASE_VIDEO_CODEC_STREAM_LOCK (self);
return GST_BASE_VIDEO_DECODER_FLOW_DROPPED;
}
static GstFlowReturn
gst_omx_video_dec_drain (GstOMXVideoDec * self)
{
GstOMXVideoDecClass *klass;
GstOMXBuffer *buf;
GstOMXAcquireBufferReturn acq_ret;
GST_DEBUG_OBJECT (self, "Draining component");
klass = GST_OMX_VIDEO_DEC_GET_CLASS (self);
if (!self->started) {
GST_DEBUG_OBJECT (self, "Component not started yet");
return GST_FLOW_OK;
}
self->started = FALSE;
/* Don't send EOS buffer twice, this doesn't work */
if (self->eos) {
GST_DEBUG_OBJECT (self, "Component is EOS already");
return GST_FLOW_OK;
}
if ((klass->cdata.hacks & GST_OMX_HACK_NO_EMPTY_EOS_BUFFER)) {
GST_WARNING_OBJECT (self, "Component does not support empty EOS buffers");
return GST_FLOW_OK;
}
/* Make sure to release the base class stream lock, otherwise
* _loop() can't call _finish_frame() and we might block forever
* because no input buffers are released */
GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (self);
/* Send an EOS buffer to the component and let the base
* class drop the EOS event. We will send it later when
* the EOS buffer arrives on the output port. */
acq_ret = gst_omx_port_acquire_buffer (self->in_port, &buf);
if (acq_ret != GST_OMX_ACQUIRE_BUFFER_OK) {
GST_BASE_VIDEO_CODEC_STREAM_LOCK (self);
GST_ERROR_OBJECT (self, "Failed to acquire buffer for draining: %d",
acq_ret);
return GST_FLOW_ERROR;
}
g_mutex_lock (self->drain_lock);
self->draining = TRUE;
buf->omx_buf->nFilledLen = 0;
buf->omx_buf->nTimeStamp =
gst_util_uint64_scale (self->last_upstream_ts, OMX_TICKS_PER_SECOND,
GST_SECOND);
buf->omx_buf->nTickCount = 0;
buf->omx_buf->nFlags |= OMX_BUFFERFLAG_EOS;
gst_omx_port_release_buffer (self->in_port, buf);
GST_DEBUG_OBJECT (self, "Waiting until component is drained");
if (G_UNLIKELY (self->component->hacks & GST_OMX_HACK_DRAIN_MAY_NOT_RETURN)) {
GTimeVal tv = {.tv_sec = 0,.tv_usec = 500000 };
if (!g_cond_timed_wait (self->drain_cond, self->drain_lock, &tv))
GST_WARNING_OBJECT (self, "Drain timed out");
else
GST_DEBUG_OBJECT (self, "Drained component");
} else {
g_cond_wait (self->drain_cond, self->drain_lock);
GST_DEBUG_OBJECT (self, "Drained component");
}
g_mutex_unlock (self->drain_lock);
GST_BASE_VIDEO_CODEC_STREAM_LOCK (self);
self->started = FALSE;
return GST_FLOW_OK;
}
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