gstreamer/gst-libs/gst/video/gstbasevideodecoder.c

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/* GStreamer
* Copyright (C) 2008 David Schleef <ds@schleef.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstbasevideodecoder.h"
#include <string.h>
GST_DEBUG_CATEGORY_EXTERN (basevideo_debug);
#define GST_CAT_DEFAULT basevideo_debug
static void gst_base_video_decoder_finalize (GObject * object);
static gboolean gst_base_video_decoder_sink_setcaps (GstPad * pad,
GstCaps * caps);
static gboolean gst_base_video_decoder_sink_event (GstPad * pad,
GstEvent * event);
static gboolean gst_base_video_decoder_src_event (GstPad * pad,
GstEvent * event);
static GstFlowReturn gst_base_video_decoder_chain (GstPad * pad,
GstBuffer * buf);
static gboolean gst_base_video_decoder_sink_query (GstPad * pad,
GstQuery * query);
static GstStateChangeReturn gst_base_video_decoder_change_state (GstElement *
element, GstStateChange transition);
static const GstQueryType *gst_base_video_decoder_get_query_types (GstPad *
pad);
static gboolean gst_base_video_decoder_src_query (GstPad * pad,
GstQuery * query);
static gboolean gst_base_video_decoder_src_convert (GstPad * pad,
GstFormat src_format, gint64 src_value, GstFormat * dest_format,
gint64 * dest_value);
static void gst_base_video_decoder_reset (GstBaseVideoDecoder *
base_video_decoder);
static guint64
gst_base_video_decoder_get_timestamp (GstBaseVideoDecoder * base_video_decoder,
int picture_number);
static guint64
gst_base_video_decoder_get_field_timestamp (GstBaseVideoDecoder *
base_video_decoder, int field_offset);
static GstVideoFrame *gst_base_video_decoder_new_frame (GstBaseVideoDecoder *
base_video_decoder);
static void gst_base_video_decoder_free_frame (GstVideoFrame * frame);
GST_BOILERPLATE (GstBaseVideoDecoder, gst_base_video_decoder,
GstBaseVideoCodec, GST_TYPE_BASE_VIDEO_CODEC);
static void
gst_base_video_decoder_base_init (gpointer g_class)
{
}
static void
gst_base_video_decoder_class_init (GstBaseVideoDecoderClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = G_OBJECT_CLASS (klass);
gstelement_class = GST_ELEMENT_CLASS (klass);
gobject_class->finalize = gst_base_video_decoder_finalize;
gstelement_class->change_state = gst_base_video_decoder_change_state;
parent_class = g_type_class_peek_parent (klass);
}
static void
gst_base_video_decoder_init (GstBaseVideoDecoder * base_video_decoder,
GstBaseVideoDecoderClass * klass)
{
GstPad *pad;
GST_DEBUG ("gst_base_video_decoder_init");
pad = GST_BASE_VIDEO_CODEC_SINK_PAD (base_video_decoder);
gst_pad_set_chain_function (pad, gst_base_video_decoder_chain);
gst_pad_set_event_function (pad, gst_base_video_decoder_sink_event);
gst_pad_set_setcaps_function (pad, gst_base_video_decoder_sink_setcaps);
gst_pad_set_query_function (pad, gst_base_video_decoder_sink_query);
pad = GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder);
gst_pad_set_event_function (pad, gst_base_video_decoder_src_event);
gst_pad_set_query_type_function (pad, gst_base_video_decoder_get_query_types);
gst_pad_set_query_function (pad, gst_base_video_decoder_src_query);
base_video_decoder->input_adapter = gst_adapter_new ();
base_video_decoder->output_adapter = gst_adapter_new ();
gst_segment_init (&base_video_decoder->state.segment, GST_FORMAT_TIME);
gst_base_video_decoder_reset (base_video_decoder);
base_video_decoder->current_frame =
gst_base_video_decoder_new_frame (base_video_decoder);
base_video_decoder->sink_clipping = TRUE;
}
static gboolean
gst_base_video_decoder_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstBaseVideoDecoder *base_video_decoder;
GstBaseVideoDecoderClass *base_video_decoder_class;
GstStructure *structure;
const GValue *codec_data;
base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
base_video_decoder_class =
GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
GST_DEBUG ("setcaps %" GST_PTR_FORMAT, caps);
if (base_video_decoder->codec_data) {
gst_buffer_unref (base_video_decoder->codec_data);
base_video_decoder->codec_data = NULL;
}
structure = gst_caps_get_structure (caps, 0);
codec_data = gst_structure_get_value (structure, "codec_data");
if (codec_data && G_VALUE_TYPE (codec_data) == GST_TYPE_BUFFER) {
base_video_decoder->codec_data = gst_value_get_buffer (codec_data);
}
if (base_video_decoder_class->start) {
base_video_decoder_class->start (base_video_decoder);
}
g_object_unref (base_video_decoder);
return TRUE;
}
static void
gst_base_video_decoder_finalize (GObject * object)
{
GstBaseVideoDecoder *base_video_decoder;
GstBaseVideoDecoderClass *base_video_decoder_class;
g_return_if_fail (GST_IS_BASE_VIDEO_DECODER (object));
base_video_decoder = GST_BASE_VIDEO_DECODER (object);
base_video_decoder_class = GST_BASE_VIDEO_DECODER_GET_CLASS (object);
gst_base_video_decoder_reset (base_video_decoder);
GST_DEBUG_OBJECT (object, "finalize");
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_base_video_decoder_sink_event (GstPad * pad, GstEvent * event)
{
GstBaseVideoDecoder *base_video_decoder;
GstBaseVideoDecoderClass *base_video_decoder_class;
gboolean ret = FALSE;
base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
base_video_decoder_class =
GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
{
GstVideoFrame *frame;
frame = g_malloc0 (sizeof (GstVideoFrame));
frame->presentation_frame_number =
base_video_decoder->presentation_frame_number;
frame->presentation_duration = 0;
base_video_decoder->presentation_frame_number++;
base_video_decoder->frames =
g_list_append (base_video_decoder->frames, frame);
if (base_video_decoder_class->finish) {
base_video_decoder_class->finish (base_video_decoder, frame);
}
ret =
gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder),
event);
}
break;
case GST_EVENT_NEWSEGMENT:
{
gboolean update;
double rate;
double applied_rate;
GstFormat format;
gint64 start;
gint64 stop;
gint64 position;
gst_event_parse_new_segment_full (event, &update, &rate,
&applied_rate, &format, &start, &stop, &position);
if (format != GST_FORMAT_TIME)
goto newseg_wrong_format;
GST_DEBUG ("new segment %lld %lld", start, position);
gst_segment_set_newsegment_full (&base_video_decoder->state.segment,
update, rate, applied_rate, format, start, stop, position);
ret =
gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder),
event);
}
break;
default:
/* FIXME this changes the order of events */
ret =
gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder),
event);
break;
}
done:
gst_object_unref (base_video_decoder);
return ret;
newseg_wrong_format:
{
GST_DEBUG_OBJECT (base_video_decoder, "received non TIME newsegment");
gst_event_unref (event);
goto done;
}
}
static gboolean
gst_base_video_decoder_src_event (GstPad * pad, GstEvent * event)
{
GstBaseVideoDecoder *base_video_decoder;
gboolean res = FALSE;
base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
{
GstFormat format, tformat;
gdouble rate;
GstEvent *real_seek;
GstSeekFlags flags;
GstSeekType cur_type, stop_type;
gint64 cur, stop;
gint64 tcur, tstop;
gst_event_parse_seek (event, &rate, &format, &flags, &cur_type,
&cur, &stop_type, &stop);
gst_event_unref (event);
tformat = GST_FORMAT_TIME;
res =
gst_base_video_decoder_src_convert (pad, format, cur, &tformat,
&tcur);
if (!res)
goto convert_error;
res =
gst_base_video_decoder_src_convert (pad, format, stop, &tformat,
&tstop);
if (!res)
goto convert_error;
real_seek = gst_event_new_seek (rate, GST_FORMAT_TIME,
flags, cur_type, tcur, stop_type, tstop);
res =
gst_pad_push_event (GST_BASE_VIDEO_CODEC_SINK_PAD
(base_video_decoder), real_seek);
break;
}
case GST_EVENT_QOS:
{
gdouble proportion;
GstClockTimeDiff diff;
GstClockTime timestamp;
gst_event_parse_qos (event, &proportion, &diff, &timestamp);
GST_OBJECT_LOCK (base_video_decoder);
base_video_decoder->proportion = proportion;
base_video_decoder->earliest_time = timestamp + diff;
GST_OBJECT_UNLOCK (base_video_decoder);
GST_DEBUG_OBJECT (base_video_decoder,
"got QoS %" GST_TIME_FORMAT ", %" G_GINT64_FORMAT ", %g",
GST_TIME_ARGS (timestamp), diff, proportion);
res =
gst_pad_push_event (GST_BASE_VIDEO_CODEC_SINK_PAD
(base_video_decoder), event);
break;
}
default:
res =
gst_pad_push_event (GST_BASE_VIDEO_CODEC_SINK_PAD
(base_video_decoder), event);
break;
}
done:
gst_object_unref (base_video_decoder);
return res;
convert_error:
GST_DEBUG_OBJECT (base_video_decoder, "could not convert format");
goto done;
}
#if 0
static gboolean
gst_base_video_decoder_sink_convert (GstPad * pad,
GstFormat src_format, gint64 src_value,
GstFormat * dest_format, gint64 * dest_value)
{
gboolean res = TRUE;
GstBaseVideoDecoder *enc;
if (src_format == *dest_format) {
*dest_value = src_value;
return TRUE;
}
enc = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
/* FIXME: check if we are in a decoding state */
switch (src_format) {
case GST_FORMAT_BYTES:
switch (*dest_format) {
#if 0
case GST_FORMAT_DEFAULT:
*dest_value = gst_util_uint64_scale_int (src_value, 1,
enc->bytes_per_picture);
break;
#endif
case GST_FORMAT_TIME:
/* seems like a rather silly conversion, implement me if you like */
default:
res = FALSE;
}
break;
case GST_FORMAT_DEFAULT:
switch (*dest_format) {
case GST_FORMAT_TIME:
*dest_value = gst_util_uint64_scale (src_value,
GST_SECOND * enc->fps_d, enc->fps_n);
break;
#if 0
case GST_FORMAT_BYTES:
*dest_value = gst_util_uint64_scale_int (src_value,
enc->bytes_per_picture, 1);
break;
#endif
default:
res = FALSE;
}
break;
default:
res = FALSE;
break;
}
}
#endif
static gboolean
gst_base_video_decoder_src_convert (GstPad * pad,
GstFormat src_format, gint64 src_value,
GstFormat * dest_format, gint64 * dest_value)
{
gboolean res = TRUE;
GstBaseVideoDecoder *enc;
if (src_format == *dest_format) {
*dest_value = src_value;
return TRUE;
}
enc = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
/* FIXME: check if we are in a encoding state */
GST_DEBUG ("src convert");
switch (src_format) {
#if 0
case GST_FORMAT_DEFAULT:
switch (*dest_format) {
case GST_FORMAT_TIME:
*dest_value = gst_util_uint64_scale (granulepos_to_frame (src_value),
enc->fps_d * GST_SECOND, enc->fps_n);
break;
default:
res = FALSE;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
{
*dest_value = gst_util_uint64_scale (src_value,
enc->fps_n, enc->fps_d * GST_SECOND);
break;
}
default:
res = FALSE;
break;
}
break;
#endif
default:
res = FALSE;
break;
}
gst_object_unref (enc);
return res;
}
static const GstQueryType *
gst_base_video_decoder_get_query_types (GstPad * pad)
{
static const GstQueryType query_types[] = {
GST_QUERY_CONVERT,
0
};
return query_types;
}
static gboolean
gst_base_video_decoder_src_query (GstPad * pad, GstQuery * query)
{
GstBaseVideoDecoder *enc;
gboolean res;
enc = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
switch GST_QUERY_TYPE
(query) {
case GST_QUERY_CONVERT:
{
GstFormat src_fmt, dest_fmt;
gint64 src_val, dest_val;
gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
res =
gst_base_video_decoder_src_convert (pad, src_fmt, src_val, &dest_fmt,
&dest_val);
if (!res)
goto error;
gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
break;
}
default:
res = gst_pad_query_default (pad, query);
}
gst_object_unref (enc);
return res;
error:
GST_DEBUG_OBJECT (enc, "query failed");
gst_object_unref (enc);
return res;
}
static gboolean
gst_base_video_decoder_sink_query (GstPad * pad, GstQuery * query)
{
GstBaseVideoDecoder *base_video_decoder;
gboolean res = FALSE;
base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (base_video_decoder, "sink query fps=%d/%d",
base_video_decoder->state.fps_n, base_video_decoder->state.fps_d);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CONVERT:
{
GstFormat src_fmt, dest_fmt;
gint64 src_val, dest_val;
gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
res = gst_base_video_rawvideo_convert (&base_video_decoder->state,
src_fmt, src_val, &dest_fmt, &dest_val);
if (!res)
goto error;
gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
break;
}
default:
res = gst_pad_query_default (pad, query);
break;
}
done:
gst_object_unref (base_video_decoder);
return res;
error:
GST_DEBUG_OBJECT (base_video_decoder, "query failed");
goto done;
}
#if 0
static gboolean
gst_pad_is_negotiated (GstPad * pad)
{
GstCaps *caps;
g_return_val_if_fail (pad != NULL, FALSE);
caps = gst_pad_get_negotiated_caps (pad);
if (caps) {
gst_caps_unref (caps);
return TRUE;
}
return FALSE;
}
#endif
static void
gst_base_video_decoder_reset (GstBaseVideoDecoder * base_video_decoder)
{
GstBaseVideoDecoderClass *base_video_decoder_class;
GList *g;
base_video_decoder_class =
GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
GST_DEBUG ("reset");
base_video_decoder->started = FALSE;
base_video_decoder->discont = TRUE;
base_video_decoder->have_sync = FALSE;
base_video_decoder->timestamp_offset = GST_CLOCK_TIME_NONE;
base_video_decoder->system_frame_number = 0;
base_video_decoder->presentation_frame_number = 0;
base_video_decoder->last_sink_timestamp = GST_CLOCK_TIME_NONE;
base_video_decoder->last_sink_offset_end = GST_CLOCK_TIME_NONE;
base_video_decoder->base_picture_number = 0;
base_video_decoder->last_timestamp = GST_CLOCK_TIME_NONE;
base_video_decoder->offset = 0;
if (base_video_decoder->caps) {
gst_caps_unref (base_video_decoder->caps);
base_video_decoder->caps = NULL;
}
if (base_video_decoder->current_frame) {
gst_base_video_decoder_free_frame (base_video_decoder->current_frame);
base_video_decoder->current_frame = NULL;
}
base_video_decoder->have_src_caps = FALSE;
for (g = g_list_first (base_video_decoder->frames); g; g = g_list_next (g)) {
GstVideoFrame *frame = g->data;
gst_base_video_decoder_free_frame (frame);
}
g_list_free (base_video_decoder->frames);
base_video_decoder->frames = NULL;
if (base_video_decoder_class->reset) {
base_video_decoder_class->reset (base_video_decoder);
}
}
static GstFlowReturn
gst_base_video_decoder_chain (GstPad * pad, GstBuffer * buf)
{
GstBaseVideoDecoder *base_video_decoder;
GstBaseVideoDecoderClass *klass;
GstBuffer *buffer;
GstFlowReturn ret;
GST_DEBUG ("chain %lld", 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 %lld offset %lld", 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 %lld", 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);
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;
}
}
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 GstStateChangeReturn
gst_base_video_decoder_change_state (GstElement * element,
GstStateChange transition)
{
GstBaseVideoDecoder *base_video_decoder;
GstBaseVideoDecoderClass *base_video_decoder_class;
GstStateChangeReturn ret;
base_video_decoder = GST_BASE_VIDEO_DECODER (element);
base_video_decoder_class = GST_BASE_VIDEO_DECODER_GET_CLASS (element);
switch (transition) {
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (base_video_decoder_class->stop) {
base_video_decoder_class->stop (base_video_decoder);
}
break;
default:
break;
}
return ret;
}
static void
gst_base_video_decoder_free_frame (GstVideoFrame * frame)
{
g_return_if_fail (frame != NULL);
if (frame->sink_buffer) {
gst_buffer_unref (frame->sink_buffer);
}
#if 0
if (frame->src_buffer) {
gst_buffer_unref (frame->src_buffer);
}
#endif
g_free (frame);
}
static GstVideoFrame *
gst_base_video_decoder_new_frame (GstBaseVideoDecoder * base_video_decoder)
{
GstVideoFrame *frame;
frame = g_malloc0 (sizeof (GstVideoFrame));
frame->system_frame_number = base_video_decoder->system_frame_number;
base_video_decoder->system_frame_number++;
frame->decode_frame_number = frame->system_frame_number -
base_video_decoder->reorder_depth;
frame->decode_timestamp = -1;
frame->presentation_timestamp = -1;
frame->presentation_duration = -1;
frame->n_fields = 2;
return frame;
}
GstFlowReturn
gst_base_video_decoder_finish_frame (GstBaseVideoDecoder * base_video_decoder,
GstVideoFrame * frame)
{
GstBaseVideoDecoderClass *base_video_decoder_class;
GstBuffer *src_buffer;
GST_DEBUG ("finish frame");
base_video_decoder_class =
GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
GST_DEBUG ("finish frame sync=%d pts=%lld", frame->is_sync_point,
frame->presentation_timestamp);
if (frame->is_sync_point) {
if (GST_CLOCK_TIME_IS_VALID (frame->presentation_timestamp)) {
if (frame->presentation_timestamp != base_video_decoder->timestamp_offset) {
GST_DEBUG ("sync timestamp %lld diff %lld",
frame->presentation_timestamp,
frame->presentation_timestamp -
base_video_decoder->state.segment.start);
base_video_decoder->timestamp_offset = frame->presentation_timestamp;
base_video_decoder->field_index = 0;
} else {
/* This case is for one initial timestamp and no others, e.g.,
* filesrc ! decoder ! xvimagesink */
GST_WARNING ("sync timestamp didn't change, ignoring");
frame->presentation_timestamp = GST_CLOCK_TIME_NONE;
}
} else {
GST_WARNING ("sync point doesn't have timestamp");
if (GST_CLOCK_TIME_IS_VALID (base_video_decoder->timestamp_offset)) {
GST_ERROR ("No base timestamp. Assuming frames start at 0");
base_video_decoder->timestamp_offset = 0;
base_video_decoder->field_index = 0;
}
}
}
frame->field_index = base_video_decoder->field_index;
base_video_decoder->field_index += frame->n_fields;
if (frame->presentation_timestamp == GST_CLOCK_TIME_NONE) {
frame->presentation_timestamp =
gst_base_video_decoder_get_field_timestamp (base_video_decoder,
frame->field_index);
frame->presentation_duration = GST_CLOCK_TIME_NONE;
frame->decode_timestamp =
gst_base_video_decoder_get_timestamp (base_video_decoder,
frame->decode_frame_number);
}
if (frame->presentation_duration == GST_CLOCK_TIME_NONE) {
frame->presentation_duration =
gst_base_video_decoder_get_field_timestamp (base_video_decoder,
frame->field_index + frame->n_fields) - frame->presentation_timestamp;
}
if (GST_CLOCK_TIME_IS_VALID (base_video_decoder->last_timestamp)) {
if (frame->presentation_timestamp < base_video_decoder->last_timestamp) {
GST_WARNING ("decreasing timestamp (%lld < %lld)",
frame->presentation_timestamp, base_video_decoder->last_timestamp);
}
}
base_video_decoder->last_timestamp = frame->presentation_timestamp;
GST_BUFFER_FLAG_UNSET (frame->src_buffer, GST_BUFFER_FLAG_DELTA_UNIT);
if (base_video_decoder->state.interlaced) {
#ifndef GST_VIDEO_BUFFER_TFF
#define GST_VIDEO_BUFFER_TFF (GST_MINI_OBJECT_FLAG_LAST << 5)
#endif
#ifndef GST_VIDEO_BUFFER_RFF
#define GST_VIDEO_BUFFER_RFF (GST_MINI_OBJECT_FLAG_LAST << 6)
#endif
#ifndef GST_VIDEO_BUFFER_ONEFIELD
#define GST_VIDEO_BUFFER_ONEFIELD (GST_MINI_OBJECT_FLAG_LAST << 7)
#endif
int tff = base_video_decoder->state.top_field_first;
if (frame->field_index & 1) {
tff ^= 1;
}
if (tff) {
GST_BUFFER_FLAG_SET (frame->src_buffer, GST_VIDEO_BUFFER_TFF);
} else {
GST_BUFFER_FLAG_UNSET (frame->src_buffer, GST_VIDEO_BUFFER_TFF);
}
GST_BUFFER_FLAG_UNSET (frame->src_buffer, GST_VIDEO_BUFFER_RFF);
GST_BUFFER_FLAG_UNSET (frame->src_buffer, GST_VIDEO_BUFFER_ONEFIELD);
if (frame->n_fields == 3) {
GST_BUFFER_FLAG_SET (frame->src_buffer, GST_VIDEO_BUFFER_RFF);
} else if (frame->n_fields == 1) {
GST_BUFFER_FLAG_UNSET (frame->src_buffer, GST_VIDEO_BUFFER_ONEFIELD);
}
}
GST_BUFFER_TIMESTAMP (frame->src_buffer) = frame->presentation_timestamp;
GST_BUFFER_DURATION (frame->src_buffer) = frame->presentation_duration;
GST_BUFFER_OFFSET (frame->src_buffer) = -1;
GST_BUFFER_OFFSET_END (frame->src_buffer) = -1;
GST_DEBUG ("pushing frame %lld", frame->presentation_timestamp);
base_video_decoder->frames =
g_list_remove (base_video_decoder->frames, frame);
gst_base_video_decoder_set_src_caps (base_video_decoder);
src_buffer = frame->src_buffer;
g_free (frame);
if (base_video_decoder->sink_clipping) {
gint64 start = GST_BUFFER_TIMESTAMP (src_buffer);
gint64 stop = GST_BUFFER_TIMESTAMP (src_buffer) +
GST_BUFFER_DURATION (src_buffer);
if (gst_segment_clip (&base_video_decoder->state.segment, GST_FORMAT_TIME,
start, stop, &start, &stop)) {
GST_BUFFER_TIMESTAMP (src_buffer) = start;
GST_BUFFER_DURATION (src_buffer) = stop - start;
} else {
GST_DEBUG ("dropping buffer outside segment");
gst_buffer_unref (src_buffer);
return GST_FLOW_OK;
}
}
return gst_pad_push (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder),
src_buffer);
}
int
gst_base_video_decoder_get_height (GstBaseVideoDecoder * base_video_decoder)
{
return base_video_decoder->state.height;
}
int
gst_base_video_decoder_get_width (GstBaseVideoDecoder * base_video_decoder)
{
return base_video_decoder->state.width;
}
GstFlowReturn
gst_base_video_decoder_end_of_stream (GstBaseVideoDecoder * base_video_decoder,
GstBuffer * buffer)
{
if (base_video_decoder->frames) {
GST_DEBUG ("EOS with frames left over");
}
return gst_pad_push (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder),
buffer);
}
void
gst_base_video_decoder_add_to_frame (GstBaseVideoDecoder * base_video_decoder,
int n_bytes)
{
GstBuffer *buf;
GST_DEBUG ("add to frame");
#if 0
if (gst_adapter_available (base_video_decoder->output_adapter) == 0) {
GstBuffer *buffer;
buffer =
gst_adapter_get_orig_buffer_at_offset
(base_video_decoder->input_adapter, 0);
if (buffer) {
base_video_decoder->current_frame->presentation_timestamp =
GST_BUFFER_TIMESTAMP (buffer);
gst_buffer_unref (buffer);
}
}
#endif
if (n_bytes == 0)
return;
buf = gst_adapter_take_buffer (base_video_decoder->input_adapter, n_bytes);
gst_adapter_push (base_video_decoder->output_adapter, buf);
}
static guint64
gst_base_video_decoder_get_timestamp (GstBaseVideoDecoder * base_video_decoder,
int picture_number)
{
if (base_video_decoder->state.fps_d == 0) {
return -1;
}
if (picture_number < base_video_decoder->base_picture_number) {
return base_video_decoder->timestamp_offset -
(gint64) gst_util_uint64_scale (base_video_decoder->base_picture_number
- picture_number, base_video_decoder->state.fps_d * GST_SECOND,
base_video_decoder->state.fps_n);
} else {
return base_video_decoder->timestamp_offset +
gst_util_uint64_scale (picture_number -
base_video_decoder->base_picture_number,
base_video_decoder->state.fps_d * GST_SECOND,
base_video_decoder->state.fps_n);
}
}
static guint64
gst_base_video_decoder_get_field_timestamp (GstBaseVideoDecoder *
base_video_decoder, int field_offset)
{
if (base_video_decoder->state.fps_d == 0) {
return GST_CLOCK_TIME_NONE;
}
if (field_offset < 0) {
GST_WARNING ("field offset < 0");
return GST_CLOCK_TIME_NONE;
}
return base_video_decoder->timestamp_offset +
gst_util_uint64_scale (field_offset,
base_video_decoder->state.fps_d * GST_SECOND,
base_video_decoder->state.fps_n * 2);
}
GstFlowReturn
gst_base_video_decoder_have_frame (GstBaseVideoDecoder * base_video_decoder)
{
GstVideoFrame *frame = base_video_decoder->current_frame;
GstBuffer *buffer;
GstBaseVideoDecoderClass *base_video_decoder_class;
GstFlowReturn ret = GST_FLOW_OK;
int n_available;
GST_DEBUG ("have_frame");
base_video_decoder_class =
GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
n_available = gst_adapter_available (base_video_decoder->output_adapter);
if (n_available) {
buffer = gst_adapter_take_buffer (base_video_decoder->output_adapter,
n_available);
} else {
buffer = gst_buffer_new_and_alloc (0);
}
frame->distance_from_sync = base_video_decoder->distance_from_sync;
base_video_decoder->distance_from_sync++;
#if 0
if (frame->presentation_timestamp == GST_CLOCK_TIME_NONE) {
frame->presentation_timestamp =
gst_base_video_decoder_get_timestamp (base_video_decoder,
frame->presentation_frame_number);
frame->presentation_duration =
gst_base_video_decoder_get_timestamp (base_video_decoder,
frame->presentation_frame_number + 1) - frame->presentation_timestamp;
frame->decode_timestamp =
gst_base_video_decoder_get_timestamp (base_video_decoder,
frame->decode_frame_number);
}
#endif
#if 0
GST_BUFFER_TIMESTAMP (buffer) = frame->presentation_timestamp;
GST_BUFFER_DURATION (buffer) = frame->presentation_duration;
if (frame->decode_frame_number < 0) {
GST_BUFFER_OFFSET (buffer) = 0;
} else {
GST_BUFFER_OFFSET (buffer) = frame->decode_timestamp;
}
GST_BUFFER_OFFSET_END (buffer) = GST_CLOCK_TIME_NONE;
#endif
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);
if (frame->is_sync_point) {
GST_BUFFER_FLAG_UNSET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
} else {
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
}
if (base_video_decoder->discont) {
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
base_video_decoder->discont = FALSE;
}
frame->sink_buffer = buffer;
base_video_decoder->frames = g_list_append (base_video_decoder->frames,
frame);
/* do something with frame */
ret = base_video_decoder_class->handle_frame (base_video_decoder, frame);
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);
return ret;
}
GstVideoState *
gst_base_video_decoder_get_state (GstBaseVideoDecoder * base_video_decoder)
{
return &base_video_decoder->state;
}
void
gst_base_video_decoder_set_state (GstBaseVideoDecoder * base_video_decoder,
GstVideoState * state)
{
memcpy (&base_video_decoder->state, state, sizeof (*state));
}
void
gst_base_video_decoder_lost_sync (GstBaseVideoDecoder * base_video_decoder)
{
g_return_if_fail (GST_IS_BASE_VIDEO_DECODER (base_video_decoder));
GST_DEBUG ("lost_sync");
if (gst_adapter_available (base_video_decoder->input_adapter) >= 1) {
gst_adapter_flush (base_video_decoder->input_adapter, 1);
}
base_video_decoder->have_sync = FALSE;
}
void
gst_base_video_decoder_set_sync_point (GstBaseVideoDecoder * base_video_decoder)
{
GST_DEBUG ("set_sync_point");
base_video_decoder->current_frame->is_sync_point = TRUE;
base_video_decoder->distance_from_sync = 0;
base_video_decoder->current_frame->presentation_timestamp =
base_video_decoder->last_sink_timestamp;
}
GstVideoFrame *
gst_base_video_decoder_get_frame (GstBaseVideoDecoder * base_video_decoder,
int frame_number)
{
GList *g;
for (g = g_list_first (base_video_decoder->frames); g; g = g_list_next (g)) {
GstVideoFrame *frame = g->data;
if (frame->system_frame_number == frame_number) {
return frame;
}
}
return NULL;
}
void
gst_base_video_decoder_set_src_caps (GstBaseVideoDecoder * base_video_decoder)
{
GstCaps *caps;
GstVideoState *state = &base_video_decoder->state;
if (base_video_decoder->have_src_caps)
return;
caps = gst_video_format_new_caps (state->format,
state->width, state->height,
state->fps_n, state->fps_d, state->par_n, state->par_d);
gst_caps_set_simple (caps, "interlaced",
G_TYPE_BOOLEAN, state->interlaced, NULL);
GST_DEBUG ("setting caps %" GST_PTR_FORMAT, caps);
gst_pad_set_caps (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder), caps);
base_video_decoder->have_src_caps = TRUE;
}