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authorThiago Sousa Santos <thiagossantos@gmail.com>2008-11-08 02:00:58 +0000
committerDavid Schleef <ds@schleef.org>2008-11-08 02:00:58 +0000
commite8d0f5e3b34d1657a0afe7af421d349faca216ee (patch)
tree06964dc59f8be5bea086a5c98a9183a002e0174d /gst/qtmux/descriptors.c
parent5e8f80a9f5d1a9528ff016f05ef62da24f2b546a (diff)
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Copy qtmux from revision 148 of the gst-qtmux repository.
Original commit message from CVS: patch by: Thiago Sousa Santos <thiagossantos@gmail.com> * configure.ac: * gst/qtmux/Makefile.am: * gst/qtmux/atoms.c: * gst/qtmux/atoms.h: * gst/qtmux/descriptors.c: * gst/qtmux/descriptors.h: * gst/qtmux/fourcc.h: * gst/qtmux/ftypcc.h: * gst/qtmux/gstqtmux.c: * gst/qtmux/gstqtmux.h: * gst/qtmux/gstqtmuxmap.c: * gst/qtmux/gstqtmuxmap.h: * gst/qtmux/properties.c: * gst/qtmux/properties.h: Copy qtmux from revision 148 of the gst-qtmux repository. Fixes #550280.
Diffstat (limited to 'gst/qtmux/descriptors.c')
-rw-r--r--gst/qtmux/descriptors.c442
1 files changed, 442 insertions, 0 deletions
diff --git a/gst/qtmux/descriptors.c b/gst/qtmux/descriptors.c
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+/* Quicktime muxer plugin for GStreamer
+ * Copyright (C) 2008 Thiago Sousa Santos <thiagoss@embedded.ufcg.edu.br>
+ *
+ * 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.
+ */
+
+#include "descriptors.h"
+
+/**
+ * Some mp4 structures (descriptors) use a coding scheme for
+ * representing its size.
+ * It is grouped in bytes. The 1st bit set to 1 means we need another byte,
+ * 0 otherwise. The remaining 7 bits are the useful values.
+ *
+ * The next set of functions handle those values
+ */
+
+/**
+ * Gets an unsigned integer and packs it into a 'expandable size' format
+ * (as used by mp4 descriptors)
+ * @size: the integer to be parsed
+ * @ptr: the array to place the result
+ * @array_size: the size of ptr array
+ */
+static void
+expandable_size_parse (guint64 size, guint8 * ptr, guint32 array_size)
+{
+ int index = 0;
+
+ memset (ptr, 0, sizeof (array_size));
+ while (size > 0 && index < array_size) {
+ ptr[index++] = (size > 0x7F ? 0x80 : 0x0) | (size & 0x7F);
+ size = size >> 7;
+ }
+}
+
+/**
+ * Gets how many positions in an array holding an 'expandable size'
+ * are really used
+ *
+ * @ptr: the array with the 'expandable size'
+ * @array_size: the size of ptr array
+ *
+ * Returns: the number of really used positions
+ */
+static guint64
+expandable_size_get_length (guint8 * ptr, guint32 array_size)
+{
+ gboolean next = TRUE;
+ guint32 index = 0;
+
+ while (next && index < array_size) {
+ next = ((ptr[index] & 0x80) == 1);
+ index++;
+ }
+ return index;
+}
+
+/*
+ * Initializers below
+ */
+
+static void
+desc_base_descriptor_init (BaseDescriptor * bd, guint8 tag, guint32 size)
+{
+ bd->tag = tag;
+ expandable_size_parse (size, bd->size, 4);
+}
+
+static void
+desc_dec_specific_info_init (DecoderSpecificInfoDescriptor * dsid)
+{
+ desc_base_descriptor_init (&dsid->base, DECODER_SPECIFIC_INFO_TAG, 0);
+ dsid->length = 0;
+ dsid->data = NULL;
+}
+
+DecoderSpecificInfoDescriptor *
+desc_dec_specific_info_new ()
+{
+ DecoderSpecificInfoDescriptor *desc =
+ g_new0 (DecoderSpecificInfoDescriptor, 1);
+ desc_dec_specific_info_init (desc);
+ return desc;
+}
+
+static void
+desc_dec_conf_desc_init (DecoderConfigDescriptor * dcd)
+{
+ desc_base_descriptor_init (&dcd->base, DECODER_CONFIG_DESC_TAG, 0);
+ dcd->dec_specific_info = NULL;
+}
+
+static void
+desc_sl_conf_desc_init (SLConfigDescriptor * sl)
+{
+ desc_base_descriptor_init (&sl->base, SL_CONFIG_DESC_TAG, 0);
+ sl->predefined = 0x2;
+}
+
+void
+desc_es_init (ESDescriptor * es)
+{
+ desc_base_descriptor_init (&es->base, ES_DESCRIPTOR_TAG, 0);
+
+ es->id = 0;
+ es->flags = 0;
+ es->depends_on_es_id = 0;
+ es->ocr_es_id = 0;
+ es->url_length = 0;
+ es->url_string = NULL;
+
+ desc_dec_conf_desc_init (&es->dec_conf_desc);
+ desc_sl_conf_desc_init (&es->sl_conf_desc);
+}
+
+ESDescriptor *
+desc_es_descriptor_new ()
+{
+ ESDescriptor *es = g_new0 (ESDescriptor, 1);
+
+ desc_es_init (es);
+ return es;
+}
+
+/*
+ * Deinitializers/Destructors below
+ */
+
+static void
+desc_base_descriptor_clear (BaseDescriptor * base)
+{
+}
+
+void
+desc_dec_specific_info_free (DecoderSpecificInfoDescriptor * dsid)
+{
+ desc_base_descriptor_clear (&dsid->base);
+ if (dsid->data) {
+ g_free (dsid->data);
+ dsid->data = NULL;
+ }
+ g_free (dsid);
+}
+
+static void
+desc_dec_conf_desc_clear (DecoderConfigDescriptor * dec)
+{
+ desc_base_descriptor_clear (&dec->base);
+ if (dec->dec_specific_info) {
+ desc_dec_specific_info_free (dec->dec_specific_info);
+ }
+}
+
+static void
+desc_sl_config_descriptor_clear (SLConfigDescriptor * sl)
+{
+ desc_base_descriptor_clear (&sl->base);
+}
+
+void
+desc_es_descriptor_clear (ESDescriptor * es)
+{
+ desc_base_descriptor_clear (&es->base);
+ if (es->url_string) {
+ g_free (es->url_string);
+ es->url_string = NULL;
+ }
+ desc_dec_conf_desc_clear (&es->dec_conf_desc);
+ desc_sl_config_descriptor_clear (&es->sl_conf_desc);
+}
+
+void
+desc_es_descriptor_free (ESDescriptor * es)
+{
+ desc_es_descriptor_clear (es);
+ g_free (es);
+}
+
+/*
+ * Size handling functions below
+ */
+
+void
+desc_dec_specific_info_alloc_data (DecoderSpecificInfoDescriptor * dsid,
+ guint32 size)
+{
+ if (dsid->data) {
+ g_free (dsid->data);
+ }
+ dsid->data = g_new0 (guint8, size);
+ dsid->length = size;
+}
+
+static void
+desc_base_descriptor_set_size (BaseDescriptor * bd, guint32 size)
+{
+ expandable_size_parse (size, bd->size, 4);
+}
+
+static guint64
+desc_base_descriptor_get_size (BaseDescriptor * bd)
+{
+ guint64 size = 0;
+
+ size += sizeof (guint8);
+ size += expandable_size_get_length (bd->size, 4) * sizeof (guint8);
+ return size;
+}
+
+static guint64
+desc_sl_config_descriptor_get_size (SLConfigDescriptor * sl_desc)
+{
+ guint64 size = 0;
+ guint64 extra_size = 0;
+
+ size += desc_base_descriptor_get_size (&sl_desc->base);
+ /* predefined */
+ extra_size += sizeof (guint8);
+
+ desc_base_descriptor_set_size (&sl_desc->base, extra_size);
+
+ return size + extra_size;
+}
+
+static guint64
+desc_dec_specific_info_get_size (DecoderSpecificInfoDescriptor * dsid)
+{
+ guint64 size = 0;
+ guint64 extra_size = 0;
+
+ size += desc_base_descriptor_get_size (&dsid->base);
+ extra_size += sizeof (guint8) * dsid->length;
+ desc_base_descriptor_set_size (&dsid->base, extra_size);
+ return size + extra_size;
+}
+
+static guint64
+desc_dec_config_descriptor_get_size (DecoderConfigDescriptor * dec_desc)
+{
+ guint64 size = 0;
+ guint64 extra_size = 0;
+
+ size += desc_base_descriptor_get_size (&dec_desc->base);
+ /* object type */
+ extra_size += sizeof (guint8);
+ /* stream type */
+ extra_size += sizeof (guint8);
+ /* buffer size */
+ extra_size += sizeof (guint8) * 3;
+ /* max bitrate */
+ extra_size += sizeof (guint32);
+ /* avg bitrate */
+ extra_size += sizeof (guint32);
+ if (dec_desc->dec_specific_info) {
+ extra_size += desc_dec_specific_info_get_size (dec_desc->dec_specific_info);
+ }
+
+ desc_base_descriptor_set_size (&dec_desc->base, extra_size);
+ return size + extra_size;
+}
+
+static guint64
+desc_es_descriptor_get_size (ESDescriptor * es)
+{
+ guint64 size = 0;
+ guint64 extra_size = 0;
+
+ size += desc_base_descriptor_get_size (&es->base);
+ /* id */
+ extra_size += sizeof (guint16);
+ /* flags */
+ extra_size += sizeof (guint8);
+ /* depends_on_es_id */
+ if (es->flags & 0x80) {
+ extra_size += sizeof (guint16);
+ }
+ if (es->flags & 0x40) {
+ /* url_length */
+ extra_size += sizeof (guint8);
+ /* url */
+ extra_size += sizeof (gchar) * es->url_length;
+ }
+ if (es->flags & 0x20) {
+ /* ocr_es_id */
+ extra_size += sizeof (guint16);
+ }
+
+ extra_size += desc_dec_config_descriptor_get_size (&es->dec_conf_desc);
+ extra_size += desc_sl_config_descriptor_get_size (&es->sl_conf_desc);
+
+ desc_base_descriptor_set_size (&es->base, extra_size);
+
+ return size + extra_size;
+}
+
+static gboolean
+desc_es_descriptor_check_stream_dependency (ESDescriptor * es)
+{
+ return es->flags & 0x80;
+}
+
+static gboolean
+desc_es_descriptor_check_url_flag (ESDescriptor * es)
+{
+ return es->flags & 0x40;
+}
+
+static gboolean
+desc_es_descriptor_check_ocr (ESDescriptor * es)
+{
+ return es->flags & 0x20;
+}
+
+/* Copy/Serializations Functions below */
+
+static guint64
+desc_base_descriptor_copy_data (BaseDescriptor * desc, guint8 ** buffer,
+ guint64 * size, guint64 * offset)
+{
+ guint64 original_offset = *offset;
+
+ prop_copy_uint8 (desc->tag, buffer, size, offset);
+ prop_copy_uint8_array (desc->size, expandable_size_get_length (desc->size, 4),
+ buffer, size, offset);
+ return original_offset - *offset;
+}
+
+static guint64
+desc_sl_config_descriptor_copy_data (SLConfigDescriptor * desc,
+ guint8 ** buffer, guint64 * size, guint64 * offset)
+{
+ guint64 original_offset = *offset;
+
+ if (!desc_base_descriptor_copy_data (&desc->base, buffer, size, offset)) {
+ return 0;
+ }
+ /* predefined attribute */
+ prop_copy_uint8 (desc->predefined, buffer, size, offset);
+
+ return *offset - original_offset;
+}
+
+static guint64
+desc_dec_specific_info_copy_data (DecoderSpecificInfoDescriptor * desc,
+ guint8 ** buffer, guint64 * size, guint64 * offset)
+{
+ guint64 original_offset = *offset;
+
+ if (!desc_base_descriptor_copy_data (&desc->base, buffer, size, offset)) {
+ return 0;
+ }
+ prop_copy_uint8_array (desc->data, desc->length, buffer, size, offset);
+
+ return *offset - original_offset;
+}
+
+static guint64
+desc_dec_config_descriptor_copy_data (DecoderConfigDescriptor * desc,
+ guint8 ** buffer, guint64 * size, guint64 * offset)
+{
+ guint64 original_offset = *offset;
+
+ if (!desc_base_descriptor_copy_data (&desc->base, buffer, size, offset)) {
+ return 0;
+ }
+
+ prop_copy_uint8 (desc->object_type, buffer, size, offset);
+
+ prop_copy_uint8 (desc->stream_type, buffer, size, offset);
+ prop_copy_uint8_array (desc->buffer_size_DB, 3, buffer, size, offset);
+
+ prop_copy_uint32 (desc->max_bitrate, buffer, size, offset);
+ prop_copy_uint32 (desc->avg_bitrate, buffer, size, offset);
+
+ if (desc->dec_specific_info) {
+ if (!desc_dec_specific_info_copy_data (desc->dec_specific_info, buffer,
+ size, offset)) {
+ return 0;
+ }
+ }
+
+ return *offset - original_offset;
+}
+
+guint64
+desc_es_descriptor_copy_data (ESDescriptor * desc, guint8 ** buffer,
+ guint64 * size, guint64 * offset)
+{
+ guint64 desc_size;
+ guint64 original_offset = *offset;
+
+ /* must call this twice to have size fields of all contained descriptors set
+ * correctly, and to have the size of the size fields taken into account */
+ desc_size = desc_es_descriptor_get_size (desc);
+ desc_size = desc_es_descriptor_get_size (desc);
+
+ if (!desc_base_descriptor_copy_data (&desc->base, buffer, size, offset)) {
+ return 0;
+ }
+ /* id and flags */
+ prop_copy_uint16 (desc->id, buffer, size, offset);
+ prop_copy_uint8 (desc->flags, buffer, size, offset);
+
+ if (desc_es_descriptor_check_stream_dependency (desc)) {
+ prop_copy_uint16 (desc->depends_on_es_id, buffer, size, offset);
+ }
+
+ if (desc_es_descriptor_check_url_flag (desc)) {
+ prop_copy_size_string (desc->url_string, desc->url_length, buffer, size,
+ offset);
+ }
+
+ if (desc_es_descriptor_check_ocr (desc)) {
+ prop_copy_uint16 (desc->ocr_es_id, buffer, size, offset);
+ }
+
+ if (!desc_dec_config_descriptor_copy_data (&desc->dec_conf_desc, buffer, size,
+ offset)) {
+ return 0;
+ }
+
+ if (!desc_sl_config_descriptor_copy_data (&desc->sl_conf_desc, buffer, size,
+ offset)) {
+ return 0;
+ }
+
+ return *offset - original_offset;
+}