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137 lines
3.8 KiB
C
137 lines
3.8 KiB
C
/* GStreamer
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* Copyright (C) 2008 David Schleef <ds@schleef.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstbasevideocodec.h"
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#include <string.h>
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GST_DEBUG_CATEGORY_EXTERN (basevideocodec_debug);
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#define GST_CAT_DEFAULT basevideocodec_debug
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#if 0
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guint64
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gst_base_video_convert_bytes_to_frames (GstVideoState * state, guint64 bytes)
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{
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return gst_util_uint64_scale_int (bytes, 1, state->bytes_per_picture);
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}
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guint64
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gst_base_video_convert_frames_to_bytes (GstVideoState * state, guint64 frames)
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{
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return frames * state->bytes_per_picture;
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}
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#endif
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gboolean
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gst_base_video_rawvideo_convert (GstVideoState * state,
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GstFormat src_format, gint64 src_value,
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GstFormat * dest_format, gint64 * dest_value)
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{
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gboolean res = FALSE;
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if (src_format == *dest_format) {
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*dest_value = src_value;
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return TRUE;
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}
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if (src_format == GST_FORMAT_BYTES &&
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*dest_format == GST_FORMAT_DEFAULT && state->bytes_per_picture != 0) {
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/* convert bytes to frames */
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*dest_value = gst_util_uint64_scale_int (src_value, 1,
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state->bytes_per_picture);
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res = TRUE;
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} else if (src_format == GST_FORMAT_DEFAULT &&
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*dest_format == GST_FORMAT_BYTES && state->bytes_per_picture != 0) {
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/* convert bytes to frames */
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*dest_value = src_value * state->bytes_per_picture;
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res = TRUE;
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} else if (src_format == GST_FORMAT_DEFAULT &&
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*dest_format == GST_FORMAT_TIME && state->fps_n != 0) {
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/* convert frames to time */
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/* FIXME add segment time? */
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*dest_value = gst_util_uint64_scale (src_value,
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GST_SECOND * state->fps_d, state->fps_n);
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res = TRUE;
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} else if (src_format == GST_FORMAT_TIME &&
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*dest_format == GST_FORMAT_DEFAULT && state->fps_d != 0) {
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/* convert time to frames */
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/* FIXME subtract segment time? */
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*dest_value = gst_util_uint64_scale (src_value, state->fps_n,
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GST_SECOND * state->fps_d);
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res = TRUE;
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}
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/* FIXME add bytes <--> time */
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return res;
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}
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gboolean
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gst_base_video_encoded_video_convert (GstVideoState * state,
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GstFormat src_format, gint64 src_value,
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GstFormat * dest_format, gint64 * dest_value)
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{
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gboolean res = FALSE;
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if (src_format == *dest_format) {
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*dest_value = src_value;
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return TRUE;
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}
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GST_DEBUG ("src convert");
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#if 0
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if (src_format == GST_FORMAT_DEFAULT && *dest_format == GST_FORMAT_TIME) {
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if (dec->fps_d != 0) {
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*dest_value = gst_util_uint64_scale (granulepos_to_frame (src_value),
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dec->fps_d * GST_SECOND, dec->fps_n);
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res = TRUE;
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} else {
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res = FALSE;
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}
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} else {
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GST_WARNING ("unhandled conversion from %d to %d", src_format,
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*dest_format);
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res = FALSE;
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}
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#endif
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return res;
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}
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GstClockTime
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gst_video_state_get_timestamp (const GstVideoState * state,
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GstSegment * segment, int frame_number)
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{
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if (frame_number < 0) {
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return segment->start -
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(gint64) gst_util_uint64_scale (-frame_number,
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state->fps_d * GST_SECOND, state->fps_n);
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} else {
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return segment->start +
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gst_util_uint64_scale (frame_number,
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state->fps_d * GST_SECOND, state->fps_n);
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}
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}
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