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194 lines
5.5 KiB
C
194 lines
5.5 KiB
C
/* GStreamer Musepack decoder plugin
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* Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, 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 "gstmusepackreader.h"
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#include <gst/gst.h>
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#include <string.h>
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GST_DEBUG_CATEGORY_EXTERN (musepackdec_debug);
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#define GST_CAT_DEFAULT musepackdec_debug
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#ifdef MPC_IS_OLD_API
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static mpc_int32_t gst_musepack_reader_peek (void *this, void *ptr,
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mpc_int32_t size);
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static mpc_int32_t gst_musepack_reader_read (void *this, void *ptr,
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mpc_int32_t size);
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static mpc_bool_t gst_musepack_reader_seek (void *this, mpc_int32_t offset);
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static mpc_int32_t gst_musepack_reader_tell (void *this);
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static mpc_int32_t gst_musepack_reader_get_size (void *this);
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static mpc_bool_t gst_musepack_reader_canseek (void *this);
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#else
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static mpc_int32_t gst_musepack_reader_peek (mpc_reader * this, void *ptr,
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mpc_int32_t size);
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static mpc_int32_t gst_musepack_reader_read (mpc_reader * this, void *ptr,
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mpc_int32_t size);
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static mpc_bool_t gst_musepack_reader_seek (mpc_reader * this,
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mpc_int32_t offset);
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static mpc_int32_t gst_musepack_reader_tell (mpc_reader * this);
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static mpc_int32_t gst_musepack_reader_get_size (mpc_reader * this);
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static mpc_bool_t gst_musepack_reader_canseek (mpc_reader * this);
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#endif
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#ifdef MPC_IS_OLD_API
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static mpc_int32_t
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gst_musepack_reader_peek (void *this, void *ptr, mpc_int32_t size)
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{
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GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (this);
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#else
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static mpc_int32_t
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gst_musepack_reader_peek (mpc_reader * this, void *ptr, mpc_int32_t size)
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{
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GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (this->data);
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#endif
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GstFlowReturn flow_ret;
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GstBuffer *buf = NULL;
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guint read;
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g_return_val_if_fail (size > 0, 0);
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/* GST_LOG_OBJECT (musepackdec, "size=%d", size); */
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flow_ret = gst_pad_pull_range (musepackdec->sinkpad, musepackdec->offset,
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size, &buf);
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if (flow_ret != GST_FLOW_OK) {
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GST_DEBUG_OBJECT (musepackdec, "Flow: %s", gst_flow_get_name (flow_ret));
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return 0;
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}
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read = MIN (GST_BUFFER_SIZE (buf), size);
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if (read < size) {
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GST_WARNING_OBJECT (musepackdec, "Short read: got only %u bytes of %u "
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"bytes requested at offset %" G_GINT64_FORMAT, read, size,
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musepackdec->offset);
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/* GST_ELEMENT_ERROR (musepackdec, RESOURCE, READ, (NULL), (NULL)); */
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}
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memcpy (ptr, GST_BUFFER_DATA (buf), read);
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gst_buffer_unref (buf);
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return read;
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}
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#ifdef MPC_IS_OLD_API
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static mpc_int32_t
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gst_musepack_reader_read (void *this, void *ptr, mpc_int32_t size)
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{
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GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (this);
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#else
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static mpc_int32_t
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gst_musepack_reader_read (mpc_reader * this, void *ptr, mpc_int32_t size)
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{
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GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (this->data);
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#endif
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gint read;
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/* read = peek + flush */
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if ((read = gst_musepack_reader_peek (this, ptr, size)) > 0) {
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musepackdec->offset += read;
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}
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return read;
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}
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#ifdef MPC_IS_OLD_API
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static mpc_bool_t
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gst_musepack_reader_seek (void *this, mpc_int32_t offset)
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{
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GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (this);
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#else
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static mpc_bool_t
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gst_musepack_reader_seek (mpc_reader * this, mpc_int32_t offset)
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{
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GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (this->data);
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#endif
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mpc_int32_t length;
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length = gst_musepack_reader_get_size (this);
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if (length > 0 && offset >= 0 && offset < length) {
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musepackdec->offset = offset;
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GST_LOG_OBJECT (musepackdec, "Seek'ed to byte offset %d", (gint) offset);
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return TRUE;
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} else {
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GST_DEBUG_OBJECT (musepackdec, "Cannot seek to offset %d", (gint) offset);
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return FALSE;
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}
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}
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#ifdef MPC_IS_OLD_API
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static mpc_int32_t
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gst_musepack_reader_tell (void *this)
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{
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GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (this);
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#else
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static mpc_int32_t
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gst_musepack_reader_tell (mpc_reader * this)
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{
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GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (this->data);
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#endif
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return musepackdec->offset;
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}
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#ifdef MPC_IS_OLD_API
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static mpc_int32_t
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gst_musepack_reader_get_size (void *this)
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{
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GstMusepackDec *dec = GST_MUSEPACK_DEC (this);
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#else
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static mpc_int32_t
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gst_musepack_reader_get_size (mpc_reader * this)
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{
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GstMusepackDec *dec = GST_MUSEPACK_DEC (this->data);
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#endif
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GstFormat format = GST_FORMAT_BYTES;
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gint64 length = -1;
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if (!gst_pad_query_peer_duration (dec->sinkpad, &format, &length))
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length = -1;
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return (mpc_int32_t) length;
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}
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#ifdef MPC_IS_OLD_API
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static mpc_bool_t
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gst_musepack_reader_canseek (void *this)
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#else
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static mpc_bool_t
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gst_musepack_reader_canseek (mpc_reader * this)
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#endif
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{
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return TRUE;
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}
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void
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gst_musepack_init_reader (mpc_reader * r, GstMusepackDec * musepackdec)
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{
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r->data = musepackdec;
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r->read = gst_musepack_reader_read;
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r->seek = gst_musepack_reader_seek;
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r->tell = gst_musepack_reader_tell;
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r->get_size = gst_musepack_reader_get_size;
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r->canseek = gst_musepack_reader_canseek;
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}
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