static gboolean
gst_base_video_decoder_sink_activate (GstBaseVideoDecoder * decoder,
gboolean active)
{
GstBaseVideoDecoderClass *klass;
gboolean result = FALSE;
GST_DEBUG_OBJECT (decoder, "activate");
klass = GST_BASE_VIDEO_DECODER_GET_CLASS (decoder);
if (active) {
if (klass->start)
result = klass->start (decoder);
} else {
/* We must make sure streaming has finished before resetting things
* and calling the ::stop vfunc */
GST_PAD_STREAM_LOCK (GST_BASE_VIDEO_CODEC_SINK_PAD (decoder));
GST_PAD_STREAM_UNLOCK (GST_BASE_VIDEO_CODEC_SINK_PAD (decoder));
if (klass->stop)
result = klass->stop (decoder);
}
GST_DEBUG_OBJECT (decoder, "activate: %d", result);
return result;
}
GstFlowReturn
gst_base_video_decoder_have_frame (GstBaseVideoDecoder * base_video_decoder,
gboolean include_current_buf, GstVideoFrame ** new_frame)
{
GstVideoFrame *frame = base_video_decoder->current_frame;
GstBaseVideoDecoderClass *klass;
guint64 frame_end_offset;
GstClockTime timestamp, duration;
GstClockTime running_time;
GstClockTimeDiff deadline;
GstFlowReturn ret;
klass = GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
if (include_current_buf)
frame_end_offset = base_video_decoder->current_buf_offset;
else
frame_end_offset = base_video_decoder->prev_buf_offset;
gst_base_video_decoder_get_timestamp_at_offset (base_video_decoder,
frame_end_offset, ×tamp, &duration);
frame->presentation_timestamp = timestamp;
frame->presentation_duration = duration;
if (GST_VIDEO_FRAME_FLAG_IS_SET (frame, GST_VIDEO_FRAME_FLAG_SYNC_POINT))
base_video_decoder->distance_from_sync = 0;
frame->distance_from_sync = base_video_decoder->distance_from_sync;
base_video_decoder->distance_from_sync++;
GST_DEBUG ("pts %" GST_TIME_FORMAT,
GST_TIME_ARGS (frame->presentation_timestamp));
GST_DEBUG ("dts %" GST_TIME_FORMAT, GST_TIME_ARGS (frame->decode_timestamp));
GST_DEBUG ("dist %d", frame->distance_from_sync);
running_time = gst_segment_to_running_time (&base_video_decoder->segment,
GST_FORMAT_TIME, frame->presentation_timestamp);
if (GST_CLOCK_TIME_IS_VALID (base_video_decoder->earliest_time))
deadline = GST_CLOCK_DIFF (base_video_decoder->earliest_time, running_time);
else
deadline = G_MAXINT64;
/* do something with frame */
ret = klass->handle_frame (base_video_decoder, frame, deadline);
if (!GST_FLOW_IS_SUCCESS (ret)) {
GST_DEBUG ("flow error!");
}
/* create new frame */
base_video_decoder->current_frame =
gst_base_video_decoder_new_frame (base_video_decoder);
if (new_frame)
*new_frame = base_video_decoder->current_frame;
return ret;
}
static GstFlowReturn
gst_base_video_decoder_chain (GstPad * pad, GstBuffer * buf)
{
GstBaseVideoDecoder *base_video_decoder;
GstBaseVideoDecoderClass *klass;
GstBuffer *buffer;
GstFlowReturn ret;
GST_DEBUG ("chain %" G_GINT64_FORMAT, GST_BUFFER_TIMESTAMP (buf));
#if 0
/* requiring the pad to be negotiated makes it impossible to use
* oggdemux or filesrc ! decoder */
if (!gst_pad_is_negotiated (pad)) {
GST_DEBUG ("not negotiated");
return GST_FLOW_NOT_NEGOTIATED;
}
#endif
base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
klass = GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
GST_DEBUG_OBJECT (base_video_decoder, "chain");
if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DISCONT))) {
GST_DEBUG_OBJECT (base_video_decoder, "received DISCONT buffer");
if (base_video_decoder->started) {
gst_base_video_decoder_reset (base_video_decoder);
}
}
if (!base_video_decoder->started) {
klass->start (base_video_decoder);
base_video_decoder->started = TRUE;
}
if (GST_BUFFER_TIMESTAMP (buf) != GST_CLOCK_TIME_NONE) {
GST_DEBUG ("timestamp %" G_GINT64_FORMAT " offset %" G_GINT64_FORMAT,
GST_BUFFER_TIMESTAMP (buf), base_video_decoder->offset);
base_video_decoder->last_sink_timestamp = GST_BUFFER_TIMESTAMP (buf);
}
if (GST_BUFFER_OFFSET_END (buf) != -1) {
GST_DEBUG ("gp %" G_GINT64_FORMAT, GST_BUFFER_OFFSET_END (buf));
base_video_decoder->last_sink_offset_end = GST_BUFFER_OFFSET_END (buf);
}
base_video_decoder->offset += GST_BUFFER_SIZE (buf);
#if 0
if (base_video_decoder->timestamp_offset == GST_CLOCK_TIME_NONE &&
GST_BUFFER_TIMESTAMP (buf) != GST_CLOCK_TIME_NONE) {
GST_DEBUG ("got new offset %lld", GST_BUFFER_TIMESTAMP (buf));
base_video_decoder->timestamp_offset = GST_BUFFER_TIMESTAMP (buf);
}
#endif
if (base_video_decoder->current_frame == NULL) {
base_video_decoder->current_frame =
gst_base_video_decoder_new_frame (base_video_decoder);
}
gst_adapter_push (base_video_decoder->input_adapter, buf);
if (!base_video_decoder->have_sync) {
int n, m;
GST_DEBUG ("no sync, scanning");
n = gst_adapter_available (base_video_decoder->input_adapter);
m = klass->scan_for_sync (base_video_decoder, FALSE, 0, n);
if (m < 0) {
g_warning ("subclass returned negative scan %d", m);
}
if (m >= n) {
g_warning ("subclass scanned past end %d >= %d", m, n);
}
gst_adapter_flush (base_video_decoder->input_adapter, m);
if (m < n) {
GST_DEBUG ("found possible sync after %d bytes (of %d)", m, n);
/* this is only "maybe" sync */
base_video_decoder->have_sync = TRUE;
}
if (!base_video_decoder->have_sync) {
gst_object_unref (base_video_decoder);
return GST_FLOW_OK;
}
}
/* FIXME: use gst_adapter_prev_timestamp() here instead? */
buffer = gst_adapter_get_buffer (base_video_decoder->input_adapter);
base_video_decoder->buffer_timestamp = GST_BUFFER_TIMESTAMP (buffer);
gst_buffer_unref (buffer);
do {
ret = klass->parse_data (base_video_decoder, FALSE);
} while (ret == GST_FLOW_OK);
if (ret == GST_BASE_VIDEO_DECODER_FLOW_NEED_DATA) {
gst_object_unref (base_video_decoder);
return GST_FLOW_OK;
}
gst_object_unref (base_video_decoder);
return ret;
}
static GstFlowReturn
gst_base_video_decoder_drain (GstBaseVideoDecoder * dec, gboolean at_eos)
{
GstBaseVideoDecoderClass *klass;
GstBaseVideoDecoderScanResult res;
guint size;
klass = GST_BASE_VIDEO_DECODER_GET_CLASS (dec);
if (gst_adapter_available (dec->input_adapter) == 0)
return GST_FLOW_OK;
lost_sync:
if (!dec->have_sync) {
gint n, m;
GST_DEBUG ("no sync, scanning");
n = gst_adapter_available (dec->input_adapter);
m = klass->scan_for_sync (dec, dec->input_adapter);
if (m == -1) {
gst_object_unref (dec);
return GST_FLOW_OK;
}
if (m < 0) {
g_warning ("subclass returned negative scan %d", m);
}
if (m >= n) {
GST_ERROR ("subclass scanned past end %d >= %d", m, n);
}
gst_adapter_flush (dec->input_adapter, m);
if (m < n) {
GST_DEBUG ("found possible sync after %d bytes (of %d)", m, n);
/* this is only "maybe" sync */
dec->have_sync = TRUE;
}
if (!dec->have_sync) {
return GST_FLOW_OK;
}
}
res = klass->scan_for_packet_end (dec, dec->input_adapter, &size, at_eos);
while (res == GST_BASE_VIDEO_DECODER_SCAN_RESULT_OK) {
GstBuffer *buf;
GstFlowReturn ret;
GST_DEBUG ("Packet size: %u", size);
if (size > gst_adapter_available (dec->input_adapter))
return GST_FLOW_OK;
buf = gst_adapter_take_buffer (dec->input_adapter, size);
dec->prev_buf_offset = dec->current_buf_offset;
dec->current_buf_offset = dec->input_offset -
gst_adapter_available (dec->input_adapter);
ret = klass->parse_data (dec, buf, at_eos);
if (ret != GST_FLOW_OK)
return ret;
res = klass->scan_for_packet_end (dec, dec->input_adapter, &size, at_eos);
}
switch (res) {
case GST_BASE_VIDEO_DECODER_SCAN_RESULT_LOST_SYNC:
dec->have_sync = FALSE;
goto lost_sync;
case GST_BASE_VIDEO_DECODER_SCAN_RESULT_NEED_DATA:
return GST_FLOW_OK;
default:
GST_ERROR_OBJECT (dec, "Subclass returned invalid scan result");
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
gst_base_video_decoder_chain (GstPad * pad, GstBuffer * buf)
{
GstBaseVideoDecoder *base_video_decoder;
GstBaseVideoDecoderClass *klass;
GstFlowReturn ret;
GST_DEBUG ("chain %" GST_TIME_FORMAT " duration %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
#if 0
/* requiring the pad to be negotiated makes it impossible to use
* oggdemux or filesrc ! decoder */
if (!gst_pad_is_negotiated (pad)) {
GST_DEBUG ("not negotiated");
return GST_FLOW_NOT_NEGOTIATED;
}
#endif
base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
klass = GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
GST_DEBUG_OBJECT (base_video_decoder, "chain");
if (!base_video_decoder->have_segment) {
GstEvent *event;
GstFlowReturn ret;
GST_WARNING
("Received buffer without a new-segment. Assuming timestamps start from 0.");
gst_segment_set_newsegment_full (&base_video_decoder->segment,
FALSE, 1.0, 1.0, GST_FORMAT_TIME, 0, GST_CLOCK_TIME_NONE, 0);
base_video_decoder->have_segment = TRUE;
event = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME, 0,
GST_CLOCK_TIME_NONE, 0);
ret =
gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder),
event);
if (!ret) {
GST_ERROR ("new segment event ret=%d", ret);
return GST_FLOW_ERROR;
}
}
if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DISCONT))) {
GST_DEBUG_OBJECT (base_video_decoder, "received DISCONT buffer");
gst_base_video_decoder_reset (base_video_decoder);
}
if (!base_video_decoder->started) {
klass->start (base_video_decoder);
base_video_decoder->started = TRUE;
}
if (base_video_decoder->current_frame == NULL) {
base_video_decoder->current_frame =
gst_base_video_decoder_new_frame (base_video_decoder);
}
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
gst_base_video_decoder_add_timestamp (base_video_decoder, buf);
}
base_video_decoder->input_offset += GST_BUFFER_SIZE (buf);
#if 0
if (base_video_decoder->timestamp_offset == GST_CLOCK_TIME_NONE &&
GST_BUFFER_TIMESTAMP (buf) != GST_CLOCK_TIME_NONE) {
GST_DEBUG ("got new offset %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
base_video_decoder->timestamp_offset = GST_BUFFER_TIMESTAMP (buf);
}
#endif
if (base_video_decoder->packetized) {
base_video_decoder->current_frame->sink_buffer = buf;
ret = gst_base_video_decoder_have_frame_2 (base_video_decoder);
} else {
gst_adapter_push (base_video_decoder->input_adapter, buf);
if (!base_video_decoder->have_sync) {
int n, m;
GST_DEBUG ("no sync, scanning");
n = gst_adapter_available (base_video_decoder->input_adapter);
m = klass->scan_for_sync (base_video_decoder, FALSE, 0, n);
if (m == -1) {
gst_object_unref (base_video_decoder);
return GST_FLOW_OK;
}
if (m < 0) {
g_warning ("subclass returned negative scan %d", m);
}
if (m >= n) {
GST_ERROR ("subclass scanned past end %d >= %d", m, n);
}
gst_adapter_flush (base_video_decoder->input_adapter, m);
if (m < n) {
GST_DEBUG ("found possible sync after %d bytes (of %d)", m, n);
/* this is only "maybe" sync */
base_video_decoder->have_sync = TRUE;
}
if (!base_video_decoder->have_sync) {
gst_object_unref (base_video_decoder);
return GST_FLOW_OK;
}
}
do {
ret = klass->parse_data (base_video_decoder, FALSE);
} while (ret == GST_FLOW_OK);
if (ret == GST_BASE_VIDEO_DECODER_FLOW_NEED_DATA) {
gst_object_unref (base_video_decoder);
return GST_FLOW_OK;
}
}
gst_object_unref (base_video_decoder);
return ret;
}
