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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 "gstbasevideoutils.h"
#include <string.h>
GST_DEBUG_CATEGORY_EXTERN (basevideocodec_debug);
#define GST_CAT_DEFAULT basevideocodec_debug
gboolean
gst_base_video_rawvideo_convert (GstVideoState * state,
GstFormat src_format, gint64 src_value,
GstFormat * dest_format, gint64 * dest_value)
{
gboolean res = FALSE;
g_return_val_if_fail (dest_format != NULL, FALSE);
g_return_val_if_fail (dest_value != NULL, FALSE);
if (src_format == *dest_format || src_value == 0 || src_value == -1) {
*dest_value = src_value;
return TRUE;
}
if (src_format == GST_FORMAT_BYTES &&
*dest_format == GST_FORMAT_DEFAULT && state->bytes_per_picture != 0) {
/* convert bytes to frames */
*dest_value = gst_util_uint64_scale_int (src_value, 1,
state->bytes_per_picture);
res = TRUE;
} else if (src_format == GST_FORMAT_DEFAULT &&
*dest_format == GST_FORMAT_BYTES && state->bytes_per_picture != 0) {
/* convert bytes to frames */
*dest_value = src_value * state->bytes_per_picture;
res = TRUE;
} else if (src_format == GST_FORMAT_DEFAULT &&
*dest_format == GST_FORMAT_TIME && state->fps_n != 0) {
/* convert frames to time */
/* FIXME add segment time? */
*dest_value = gst_util_uint64_scale (src_value,
GST_SECOND * state->fps_d, state->fps_n);
res = TRUE;
} else if (src_format == GST_FORMAT_TIME &&
*dest_format == GST_FORMAT_DEFAULT && state->fps_d != 0) {
/* convert time to frames */
/* FIXME subtract segment time? */
*dest_value = gst_util_uint64_scale (src_value, state->fps_n,
GST_SECOND * state->fps_d);
res = TRUE;
} else if (src_format == GST_FORMAT_TIME &&
*dest_format == GST_FORMAT_BYTES && state->fps_d != 0 &&
state->bytes_per_picture != 0) {
/* convert time to frames */
/* FIXME subtract segment time? */
*dest_value = gst_util_uint64_scale (src_value,
state->fps_n * state->bytes_per_picture, GST_SECOND * state->fps_d);
res = TRUE;
} else if (src_format == GST_FORMAT_BYTES &&
*dest_format == GST_FORMAT_TIME && state->fps_n != 0 &&
state->bytes_per_picture != 0) {
/* convert frames to time */
/* FIXME add segment time? */
*dest_value = gst_util_uint64_scale (src_value,
GST_SECOND * state->fps_d, state->fps_n * state->bytes_per_picture);
res = TRUE;
}
return res;
}
gboolean
gst_base_video_encoded_video_convert (GstVideoState * state,
gint64 bytes, gint64 time, GstFormat src_format,
gint64 src_value, GstFormat * dest_format, gint64 * dest_value)
{
gboolean res = FALSE;
g_return_val_if_fail (dest_format != NULL, FALSE);
g_return_val_if_fail (dest_value != NULL, FALSE);
if (G_UNLIKELY (src_format == *dest_format || src_value == 0 ||
src_value == -1)) {
if (dest_value)
*dest_value = src_value;
return TRUE;
}
if (bytes <= 0 || time <= 0) {
GST_DEBUG ("not enough metadata yet to convert");
goto exit;
}
switch (src_format) {
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_TIME:
*dest_value = gst_util_uint64_scale (src_value, time, bytes);
res = TRUE;
break;
default:
res = FALSE;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_BYTES:
*dest_value = gst_util_uint64_scale (src_value, bytes, time);
res = TRUE;
break;
default:
res = FALSE;
}
break;
default:
GST_DEBUG ("unhandled conversion from %d to %d", src_format,
*dest_format);
res = FALSE;
}
exit:
return res;
}
GstClockTime
gst_video_state_get_timestamp (const GstVideoState * state,
GstSegment * segment, int frame_number)
{
if (frame_number < 0) {
return segment->start -
(gint64) gst_util_uint64_scale (-frame_number,
state->fps_d * GST_SECOND, state->fps_n);
} else {
return segment->start +
gst_util_uint64_scale (frame_number,
state->fps_d * GST_SECOND, state->fps_n);
}
}
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