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Original commit message from CVS: Patch by: Mark Nauwelaerts <manauw at skynet dot be> * configure.ac: Clean up detection of different mjpegtoolsAPI versions. * ext/mpeg2enc/gstmpeg2enc.cc: * ext/mpeg2enc/gstmpeg2enc.hh: * ext/mpeg2enc/gstmpeg2encoder.cc: * ext/mpeg2enc/gstmpeg2encoptions.cc: * ext/mpeg2enc/gstmpeg2encpicturereader.cc: * ext/mpeg2enc/gstmpeg2encpicturereader.hh: * ext/mpeg2enc/gstmpeg2encstreamwriter.cc: * ext/mpeg2enc/gstmpeg2encstreamwriter.hh: Streamline conditional code for evolving mjpegtools API, optimize and fix/prevent crash in log handling, use names/nicks for enums in the usual way andm inor updates in code and properties/settings. Partially fixes bug #520329.
169 lines
4.2 KiB
C++
169 lines
4.2 KiB
C++
/* GStreamer mpeg2enc (mjpegtools) wrapper
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* (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
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* (c) 2006 Mark Nauwelaerts <manauw@skynet.be>
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*
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* gstmpeg2encstreamwriter.cc: GStreamer/mpeg2enc output wrapper
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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 "gstmpeg2enc.hh"
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#include "gstmpeg2encstreamwriter.hh"
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#include <string.h>
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#if GST_MJPEGTOOLS_API >= 10800
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/*
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* Class init stuff.
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*/
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GstMpeg2EncStreamWriter::GstMpeg2EncStreamWriter (GstPad * in_pad,
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EncoderParams * params)
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{
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pad = in_pad;
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gst_object_ref (pad);
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buf = NULL;
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}
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GstMpeg2EncStreamWriter::~GstMpeg2EncStreamWriter ()
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{
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gst_object_unref (pad);
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}
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void
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GstMpeg2EncStreamWriter::WriteOutBufferUpto (const guint8 * buffer,
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const guint32 flush_upto)
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{
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GstBuffer *buf, *inbuf;
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GstMpeg2enc *enc = GST_MPEG2ENC (GST_PAD_PARENT (pad));
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buf = gst_buffer_new_and_alloc (flush_upto);
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memcpy (GST_BUFFER_DATA (buf), buffer, flush_upto);
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flushed += flush_upto;
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/* this should not block anything else (e.g. chain), but if it does,
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* it's ok as mpeg2enc is not really a loop-based element, but push-based */
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GST_MPEG2ENC_MUTEX_LOCK (enc);
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/* best effort at giving output some meaningful time metadata
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* no mpeg2enc specs on this though, but it might help getting the output
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* into container formats that really do like timestamps (unlike mplex) */
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if ((inbuf = (GstBuffer *) g_queue_pop_head (enc->time))) {
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GST_BUFFER_TIMESTAMP (buf) = GST_BUFFER_TIMESTAMP (inbuf);
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GST_BUFFER_DURATION (buf) = GST_BUFFER_DURATION (inbuf);
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gst_buffer_unref (inbuf);
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}
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gst_buffer_set_caps (buf, GST_PAD_CAPS (pad));
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enc->srcresult = gst_pad_push (pad, buf);
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GST_MPEG2ENC_MUTEX_UNLOCK (enc);
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}
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guint64
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GstMpeg2EncStreamWriter::BitCount ()
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{
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return flushed * 8ll;
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}
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#else
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#define BUFSIZE (128*1024)
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/*
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* Class init stuff.
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*/
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GstMpeg2EncStreamWriter::GstMpeg2EncStreamWriter (GstPad * in_pad, EncoderParams * params):
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ElemStrmWriter (*params)
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{
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pad = in_pad;
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gst_object_ref (pad);
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buf = NULL;
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}
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GstMpeg2EncStreamWriter::~GstMpeg2EncStreamWriter ()
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{
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gst_object_unref (pad);
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}
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/*
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* Output functions.
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*/
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void
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GstMpeg2EncStreamWriter::PutBits (guint32 val, gint n)
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{
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/* only relevant bits. Note that (according to Andrew),
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* some CPUs do bitshifts modulo wordsize (32), which
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* means that we have to check for n != 32 before
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* bitshifting to the relevant bits (i.e. 0xffffffff <<
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* 32 == 0xffffffff). */
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if (n != 32)
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val &= ~(0xffffffffU << n);
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/* write data */
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while (n >= outcnt) {
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if (!buf) {
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buf = gst_buffer_new_and_alloc (BUFSIZE);
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GST_BUFFER_SIZE (buf) = 0;
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}
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outbfr = (outbfr << outcnt) | (val >> (n - outcnt));
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GST_BUFFER_DATA (buf)[GST_BUFFER_SIZE (buf)++] = outbfr;
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n -= outcnt;
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outcnt = 8;
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bytecnt++;
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if (GST_BUFFER_SIZE (buf) >= BUFSIZE)
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FrameFlush ();
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}
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/* cache remaining bits */
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if (n != 0) {
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outbfr = (outbfr << n) | val;
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outcnt -= n;
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}
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}
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void
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GstMpeg2EncStreamWriter::FrameBegin ()
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{
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}
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void
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GstMpeg2EncStreamWriter::FrameFlush ()
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{
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GstMpeg2enc *enc = GST_MPEG2ENC (GST_PAD_PARENT (pad));
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if (buf) {
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/* this should not block anything else (e.g. chain), but if it does,
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* it's ok as mpeg2enc is not really a loop-based element, but push-based */
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GST_MPEG2ENC_MUTEX_LOCK (enc);
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gst_buffer_set_caps (buf, GST_PAD_CAPS (pad));
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enc->srcresult = gst_pad_push (pad, buf);
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GST_MPEG2ENC_MUTEX_UNLOCK (enc);
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buf = NULL;
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}
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}
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void
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GstMpeg2EncStreamWriter::FrameDiscard ()
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{
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}
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#endif /* GST_MJPEGTOOLS_API >= 10800 */
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