--- /dev/null
+/* GStreamer OGM parsing
+ * Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ * Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
+ *
+ * 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 <stdio.h>
+#include <string.h>
+
+#include <gst/gst.h>
+#include <gst/tag/tag.h>
+#include <gst/riff/riff-media.h>
+#include <gst/riff/riff-read.h>
+
+#include "gstogg.h"
+
+GST_DEBUG_CATEGORY_STATIC (gst_ogm_parse_debug);
+#define GST_CAT_DEFAULT gst_ogm_parse_debug
+
+#define GST_TYPE_OGM_VIDEO_PARSE (gst_ogm_video_parse_get_type())
+#define GST_IS_OGM_VIDEO_PARSE(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_OGM_VIDEO_PARSE))
+
+#define GST_TYPE_OGM_AUDIO_PARSE (gst_ogm_audio_parse_get_type())
+#define GST_IS_OGM_AUDIO_PARSE(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_OGM_AUDIO_PARSE))
+
+#define GST_TYPE_OGM_TEXT_PARSE (gst_ogm_text_parse_get_type())
+#define GST_IS_OGM_TEXT_PARSE(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_OGM_TEXT_PARSE))
+
+#define GST_TYPE_OGM_PARSE (gst_ogm_parse_get_type())
+#define GST_OGM_PARSE(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_OGM_PARSE, GstOgmParse))
+#define GST_OGM_PARSE_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_OGM_PARSE, GstOgmParse))
+#define GST_IS_OGM_PARSE(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_OGM_PARSE))
+#define GST_IS_OGM_PARSE_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_OGM_PARSE))
+#define GST_OGM_PARSE_GET_CLASS(obj) \
+ (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_OGM_PARSE, GstOgmParseClass))
+
+typedef struct _stream_header_video
+{
+ gint32 width;
+ gint32 height;
+} stream_header_video;
+
+typedef struct _stream_header_audio
+{
+ gint16 channels;
+ gint16 blockalign;
+ gint32 avgbytespersec;
+} stream_header_audio;
+
+/* sizeof(stream_header) might differ due to structure packing and
+ * alignment differences on some architectures, so not using that */
+#define OGM_STREAM_HEADER_SIZE (8+4+4+8+8+4+4+4+8)
+
+typedef struct _stream_header
+{
+ gchar streamtype[8];
+ gchar subtype[4 + 1];
+
+ /* size of the structure */
+ gint32 size;
+
+ /* in reference time */
+ gint64 time_unit;
+
+ gint64 samples_per_unit;
+
+ /* in media time */
+ gint32 default_len;
+
+ gint32 buffersize;
+ gint32 bits_per_sample;
+
+ union
+ {
+ stream_header_video video;
+ stream_header_audio audio;
+ /* text has no additional data */
+ } s;
+} stream_header;
+
+typedef struct _GstOgmParse
+{
+ GstElement element;
+
+ /* pads */
+ GstPad *srcpad, *sinkpad;
+ GstPadTemplate *srcpadtempl;
+
+ /* we need to cache events that we receive before creating the source pad */
+ GList *cached_events;
+
+ /* audio or video */
+ stream_header hdr;
+
+ /* expected next granulepos (used for timestamp guessing) */
+ guint64 next_granulepos;
+} GstOgmParse;
+
+typedef struct _GstOgmParseClass
+{
+ GstElementClass parent_class;
+} GstOgmParseClass;
+
+static GstStaticPadTemplate sink_factory_video =
+GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("application/x-ogm-video"));
+static GstStaticPadTemplate sink_factory_audio =
+GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("application/x-ogm-audio"));
+static GstStaticPadTemplate sink_factory_text =
+GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("application/x-ogm-text"));
+static GstPadTemplate *video_src_templ, *audio_src_templ, *text_src_templ;
+
+static GType gst_ogm_audio_parse_get_type (void);
+static GType gst_ogm_video_parse_get_type (void);
+static GType gst_ogm_text_parse_get_type (void);
+static GType gst_ogm_parse_get_type (void);
+
+static void gst_ogm_audio_parse_base_init (GstOgmParseClass * klass);
+static void gst_ogm_video_parse_base_init (GstOgmParseClass * klass);
+static void gst_ogm_text_parse_base_init (GstOgmParseClass * klass);
+static void gst_ogm_parse_class_init (GstOgmParseClass * klass);
+static void gst_ogm_parse_init (GstOgmParse * ogm);
+static void gst_ogm_video_parse_init (GstOgmParse * ogm);
+static void gst_ogm_audio_parse_init (GstOgmParse * ogm);
+static void gst_ogm_text_parse_init (GstOgmParse * ogm);
+
+static const GstQueryType *gst_ogm_parse_get_sink_querytypes (GstPad * pad);
+static gboolean gst_ogm_parse_sink_event (GstPad * pad, GstEvent * event);
+static gboolean gst_ogm_parse_sink_query (GstPad * pad, GstQuery * query);
+static gboolean gst_ogm_parse_sink_convert (GstPad * pad, GstFormat src_format,
+ gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
+
+static GstFlowReturn gst_ogm_parse_chain (GstPad * pad, GstBuffer * buffer);
+
+static GstStateChangeReturn gst_ogm_parse_change_state (GstElement * element,
+ GstStateChange transition);
+
+static GstElementClass *parent_class = NULL;
+
+static GType
+gst_ogm_parse_get_type (void)
+{
+ static GType ogm_parse_type = 0;
+
+ if (!ogm_parse_type) {
+ static const GTypeInfo ogm_parse_info = {
+ sizeof (GstOgmParseClass),
+ NULL,
+ NULL,
+ (GClassInitFunc) gst_ogm_parse_class_init,
+ NULL,
+ NULL,
+ sizeof (GstOgmParse),
+ 0,
+ (GInstanceInitFunc) gst_ogm_parse_init,
+ };
+
+ ogm_parse_type =
+ g_type_register_static (GST_TYPE_ELEMENT,
+ "GstOgmParse", &ogm_parse_info, 0);
+ }
+
+ return ogm_parse_type;
+}
+
+static GType
+gst_ogm_audio_parse_get_type (void)
+{
+ static GType ogm_audio_parse_type = 0;
+
+ if (!ogm_audio_parse_type) {
+ static const GTypeInfo ogm_audio_parse_info = {
+ sizeof (GstOgmParseClass),
+ (GBaseInitFunc) gst_ogm_audio_parse_base_init,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ sizeof (GstOgmParse),
+ 0,
+ (GInstanceInitFunc) gst_ogm_audio_parse_init,
+ };
+
+ ogm_audio_parse_type =
+ g_type_register_static (GST_TYPE_OGM_PARSE,
+ "GstOgmAudioParse", &ogm_audio_parse_info, 0);
+ }
+
+ return ogm_audio_parse_type;
+}
+
+static GType
+gst_ogm_video_parse_get_type (void)
+{
+ static GType ogm_video_parse_type = 0;
+
+ if (!ogm_video_parse_type) {
+ static const GTypeInfo ogm_video_parse_info = {
+ sizeof (GstOgmParseClass),
+ (GBaseInitFunc) gst_ogm_video_parse_base_init,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ sizeof (GstOgmParse),
+ 0,
+ (GInstanceInitFunc) gst_ogm_video_parse_init,
+ };
+
+ ogm_video_parse_type =
+ g_type_register_static (GST_TYPE_OGM_PARSE,
+ "GstOgmVideoParse", &ogm_video_parse_info, 0);
+ }
+
+ return ogm_video_parse_type;
+}
+
+static GType
+gst_ogm_text_parse_get_type (void)
+{
+ static GType ogm_text_parse_type = 0;
+
+ if (!ogm_text_parse_type) {
+ static const GTypeInfo ogm_text_parse_info = {
+ sizeof (GstOgmParseClass),
+ (GBaseInitFunc) gst_ogm_text_parse_base_init,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ sizeof (GstOgmParse),
+ 0,
+ (GInstanceInitFunc) gst_ogm_text_parse_init,
+ };
+
+ ogm_text_parse_type =
+ g_type_register_static (GST_TYPE_OGM_PARSE,
+ "GstOgmTextParse", &ogm_text_parse_info, 0);
+ }
+
+ return ogm_text_parse_type;
+}
+
+static void
+gst_ogm_audio_parse_base_init (GstOgmParseClass * klass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+ GstCaps *caps = gst_riff_create_audio_template_caps ();
+
+ gst_element_class_set_details_simple (element_class,
+ "OGM audio stream parser", "Codec/Decoder/Audio",
+ "parse an OGM audio header and stream",
+ "GStreamer maintainers <gstreamer-devel@lists.sourceforge.net>");
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&sink_factory_audio));
+ audio_src_templ = gst_pad_template_new ("src",
+ GST_PAD_SRC, GST_PAD_SOMETIMES, caps);
+ gst_element_class_add_pad_template (element_class, audio_src_templ);
+}
+
+static void
+gst_ogm_video_parse_base_init (GstOgmParseClass * klass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+ GstCaps *caps = gst_riff_create_video_template_caps ();
+
+ gst_element_class_set_details_simple (element_class,
+ "OGM video stream parser", "Codec/Decoder/Video",
+ "parse an OGM video header and stream",
+ "GStreamer maintainers <gstreamer-devel@lists.sourceforge.net>");
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&sink_factory_video));
+ video_src_templ = gst_pad_template_new ("src",
+ GST_PAD_SRC, GST_PAD_SOMETIMES, caps);
+ gst_element_class_add_pad_template (element_class, video_src_templ);
+}
+
+static void
+gst_ogm_text_parse_base_init (GstOgmParseClass * klass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+ GstCaps *caps = gst_caps_new_simple ("text/plain", NULL, NULL);
+
+ gst_element_class_set_details_simple (element_class,
+ "OGM text stream parser", "Codec/Decoder/Subtitle",
+ "parse an OGM text header and stream",
+ "GStreamer maintainers <gstreamer-devel@lists.sourceforge.net>");
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&sink_factory_text));
+ text_src_templ = gst_pad_template_new ("src",
+ GST_PAD_SRC, GST_PAD_SOMETIMES, caps);
+ gst_element_class_add_pad_template (element_class, text_src_templ);
+}
+
+static void
+gst_ogm_parse_class_init (GstOgmParseClass * klass)
+{
+ GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
+
+ parent_class = g_type_class_peek_parent (klass);
+
+ gstelement_class->change_state =
+ GST_DEBUG_FUNCPTR (gst_ogm_parse_change_state);
+}
+
+static void
+gst_ogm_parse_init (GstOgmParse * ogm)
+{
+ memset (&ogm->hdr, 0, sizeof (ogm->hdr));
+ ogm->next_granulepos = 0;
+ ogm->srcpad = NULL;
+ ogm->cached_events = NULL;
+}
+
+static void
+gst_ogm_audio_parse_init (GstOgmParse * ogm)
+{
+ ogm->sinkpad = gst_pad_new_from_static_template (&sink_factory_audio, "sink");
+ gst_pad_set_query_function (ogm->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_ogm_parse_sink_query));
+ gst_pad_set_chain_function (ogm->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_ogm_parse_chain));
+ gst_pad_set_event_function (ogm->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_ogm_parse_sink_event));
+ gst_element_add_pad (GST_ELEMENT (ogm), ogm->sinkpad);
+
+ ogm->srcpad = NULL;
+ ogm->srcpadtempl = audio_src_templ;
+}
+
+static void
+gst_ogm_video_parse_init (GstOgmParse * ogm)
+{
+ ogm->sinkpad = gst_pad_new_from_static_template (&sink_factory_video, "sink");
+ gst_pad_set_query_function (ogm->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_ogm_parse_sink_query));
+ gst_pad_set_chain_function (ogm->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_ogm_parse_chain));
+ gst_pad_set_event_function (ogm->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_ogm_parse_sink_event));
+ gst_element_add_pad (GST_ELEMENT (ogm), ogm->sinkpad);
+
+ ogm->srcpad = NULL;
+ ogm->srcpadtempl = video_src_templ;
+}
+
+static void
+gst_ogm_text_parse_init (GstOgmParse * ogm)
+{
+ ogm->sinkpad = gst_pad_new_from_static_template (&sink_factory_text, "sink");
+ gst_pad_set_query_type_function (ogm->sinkpad,
+ gst_ogm_parse_get_sink_querytypes);
+ gst_pad_set_query_function (ogm->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_ogm_parse_sink_query));
+ gst_pad_set_chain_function (ogm->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_ogm_parse_chain));
+ gst_pad_set_event_function (ogm->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_ogm_parse_sink_event));
+ gst_element_add_pad (GST_ELEMENT (ogm), ogm->sinkpad);
+
+ ogm->srcpad = NULL;
+ ogm->srcpadtempl = text_src_templ;
+}
+
+static const GstQueryType *
+gst_ogm_parse_get_sink_querytypes (GstPad * pad)
+{
+ static const GstQueryType types[] = {
+ GST_QUERY_POSITION,
+ 0
+ };
+
+ return types;
+}
+
+static gboolean
+gst_ogm_parse_sink_convert (GstPad * pad,
+ GstFormat src_format, gint64 src_value,
+ GstFormat * dest_format, gint64 * dest_value)
+{
+ gboolean res = FALSE;
+ GstOgmParse *ogm = GST_OGM_PARSE (gst_pad_get_parent (pad));
+
+ switch (src_format) {
+ case GST_FORMAT_DEFAULT:
+ switch (*dest_format) {
+ case GST_FORMAT_TIME:
+ switch (ogm->hdr.streamtype[0]) {
+ case 'a':
+ *dest_value = GST_SECOND * src_value / ogm->hdr.samples_per_unit;
+ res = TRUE;
+ break;
+ case 'v':
+ case 't':
+ *dest_value = (GST_SECOND / 10000000) *
+ ogm->hdr.time_unit * src_value;
+ res = TRUE;
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+ break;
+ case GST_FORMAT_TIME:
+ switch (*dest_format) {
+ case GST_FORMAT_DEFAULT:
+ switch (ogm->hdr.streamtype[0]) {
+ case 'a':
+ *dest_value = ogm->hdr.samples_per_unit * src_value / GST_SECOND;
+ res = TRUE;
+ break;
+ case 'v':
+ case 't':
+ *dest_value = src_value /
+ ((GST_SECOND / 10000000) * ogm->hdr.time_unit);
+ res = TRUE;
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ gst_object_unref (ogm);
+ return res;
+}
+
+static gboolean
+gst_ogm_parse_sink_query (GstPad * pad, GstQuery * query)
+{
+ GstOgmParse *ogm = GST_OGM_PARSE (gst_pad_get_parent (pad));
+ GstFormat format;
+ gboolean res = FALSE;
+
+ switch (GST_QUERY_TYPE (query)) {
+ case GST_QUERY_POSITION:
+ {
+ gint64 val;
+
+ gst_query_parse_position (query, &format, NULL);
+
+ if (format != GST_FORMAT_DEFAULT && format != GST_FORMAT_TIME)
+ break;
+
+ if ((res = gst_ogm_parse_sink_convert (pad,
+ GST_FORMAT_DEFAULT, ogm->next_granulepos, &format, &val))) {
+ /* don't know the total length here.. */
+ gst_query_set_position (query, format, val);
+ }
+ break;
+ }
+ case GST_QUERY_CONVERT:
+ {
+ GstFormat src_fmt, dest_fmt;
+ gint64 src_val, dest_val;
+
+ /* peel off input */
+ gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
+ if ((res = gst_ogm_parse_sink_convert (pad, src_fmt, src_val,
+ &dest_fmt, &dest_val))) {
+ gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
+ }
+ break;
+ }
+ default:
+ res = gst_pad_query_default (pad, query);
+ break;
+ }
+
+ gst_object_unref (ogm);
+ return res;
+}
+
+static GstFlowReturn
+gst_ogm_parse_stream_header (GstOgmParse * ogm, const guint8 * data, guint size)
+{
+ GstCaps *caps = NULL;
+
+ /* stream header */
+ if (size < OGM_STREAM_HEADER_SIZE)
+ goto buffer_too_small;
+
+ if (!memcmp (data, "video\000\000\000", 8)) {
+ ogm->hdr.s.video.width = GST_READ_UINT32_LE (&data[44]);
+ ogm->hdr.s.video.height = GST_READ_UINT32_LE (&data[48]);
+ } else if (!memcmp (data, "audio\000\000\000", 8)) {
+ ogm->hdr.s.audio.channels = GST_READ_UINT32_LE (&data[44]);
+ ogm->hdr.s.audio.blockalign = GST_READ_UINT32_LE (&data[46]);
+ ogm->hdr.s.audio.avgbytespersec = GST_READ_UINT32_LE (&data[48]);
+ } else if (!memcmp (data, "text\000\000\000\000", 8)) {
+ /* nothing here */
+ } else {
+ goto cannot_decode;
+ }
+ memcpy (ogm->hdr.streamtype, &data[0], 8);
+ memcpy (ogm->hdr.subtype, &data[8], 4);
+ ogm->hdr.subtype[4] = '\0';
+ ogm->hdr.size = GST_READ_UINT32_LE (&data[12]);
+ ogm->hdr.time_unit = GST_READ_UINT64_LE (&data[16]);
+ ogm->hdr.samples_per_unit = GST_READ_UINT64_LE (&data[24]);
+ ogm->hdr.default_len = GST_READ_UINT32_LE (&data[32]);
+ ogm->hdr.buffersize = GST_READ_UINT32_LE (&data[36]);
+ ogm->hdr.bits_per_sample = GST_READ_UINT32_LE (&data[40]);
+
+ switch (ogm->hdr.streamtype[0]) {
+ case 'a':{
+ guint codec_id = 0;
+
+ if (sscanf (ogm->hdr.subtype, "%04x", &codec_id) != 1) {
+ GST_WARNING_OBJECT (ogm, "cannot parse subtype %s", ogm->hdr.subtype);
+ }
+
+ caps =
+ gst_riff_create_audio_caps (codec_id, NULL, NULL, NULL, NULL, NULL);
+
+ if (caps == NULL) {
+ GST_WARNING_OBJECT (ogm, "no audio caps for codec %u found", codec_id);
+ caps = gst_caps_new_simple ("audio/x-ogm-unknown", "codec_id",
+ G_TYPE_INT, (gint) codec_id, NULL);
+ }
+
+ gst_caps_set_simple (caps,
+ "channels", G_TYPE_INT, ogm->hdr.s.audio.channels,
+ "rate", G_TYPE_INT, ogm->hdr.samples_per_unit, NULL);
+
+ GST_LOG_OBJECT (ogm, "Type: %s, subtype: 0x%04x, channels: %d, "
+ "samplerate: %d, blockalign: %d, bps: %d, caps = %" GST_PTR_FORMAT,
+ ogm->hdr.streamtype, codec_id, ogm->hdr.s.audio.channels,
+ (gint) ogm->hdr.samples_per_unit, ogm->hdr.s.audio.blockalign,
+ ogm->hdr.s.audio.avgbytespersec, caps);
+ break;
+ }
+ case 'v':{
+ guint32 fourcc;
+ gint time_unit;
+
+ fourcc = GST_MAKE_FOURCC (ogm->hdr.subtype[0],
+ ogm->hdr.subtype[1], ogm->hdr.subtype[2], ogm->hdr.subtype[3]);
+
+ caps = gst_riff_create_video_caps (fourcc, NULL, NULL, NULL, NULL, NULL);
+
+ if (caps == NULL) {
+ GST_WARNING_OBJECT (ogm, "could not find video caps for fourcc %"
+ GST_FOURCC_FORMAT, GST_FOURCC_ARGS (fourcc));
+ caps = gst_caps_new_simple ("video/x-ogm-unknown", "fourcc",
+ GST_TYPE_FOURCC, fourcc, NULL);
+ break;
+ }
+
+ GST_LOG_OBJECT (ogm, "Type: %s, subtype: %" GST_FOURCC_FORMAT
+ ", size: %dx%d, timeunit: %" G_GINT64_FORMAT
+ " (fps: %lf), s/u: %" G_GINT64_FORMAT ", "
+ "def.len: %d, bufsize: %d, bps: %d, caps = %" GST_PTR_FORMAT,
+ ogm->hdr.streamtype, GST_FOURCC_ARGS (fourcc),
+ ogm->hdr.s.video.width, ogm->hdr.s.video.height,
+ ogm->hdr.time_unit, 10000000. / ogm->hdr.time_unit,
+ ogm->hdr.samples_per_unit, ogm->hdr.default_len,
+ ogm->hdr.buffersize, ogm->hdr.bits_per_sample, caps);
+
+ /* GST_TYPE_FRACTION contains gint */
+ if (ogm->hdr.time_unit > G_MAXINT || ogm->hdr.time_unit < G_MININT)
+ GST_WARNING_OBJECT (ogm, "timeunit is out of range");
+
+ time_unit = (gint) CLAMP (ogm->hdr.time_unit, G_MININT, G_MAXINT);
+ gst_caps_set_simple (caps,
+ "width", G_TYPE_INT, ogm->hdr.s.video.width,
+ "height", G_TYPE_INT, ogm->hdr.s.video.height,
+ "framerate", GST_TYPE_FRACTION, 10000000, time_unit, NULL);
+ break;
+ }
+ case 't':{
+ GST_LOG_OBJECT (ogm, "Type: %s, s/u: %" G_GINT64_FORMAT
+ ", timeunit=%" G_GINT64_FORMAT,
+ ogm->hdr.streamtype, ogm->hdr.samples_per_unit, ogm->hdr.time_unit);
+ caps = gst_caps_new_simple ("text/plain", NULL);
+ break;
+ }
+ default:
+ g_assert_not_reached ();
+ }
+
+ if (caps == NULL)
+ goto cannot_decode;
+
+ if (ogm->srcpad) {
+ GstCaps *current_caps = GST_PAD_CAPS (ogm->srcpad);
+
+ if (current_caps && caps && !gst_caps_is_equal (current_caps, caps)) {
+ GST_WARNING_OBJECT (ogm, "Already an existing pad %s:%s",
+ GST_DEBUG_PAD_NAME (ogm->srcpad));
+ gst_pad_set_active (ogm->srcpad, FALSE);
+ gst_element_remove_pad (GST_ELEMENT (ogm), ogm->srcpad);
+ ogm->srcpad = NULL;
+ } else {
+ GST_DEBUG_OBJECT (ogm, "Existing pad has the same caps, do nothing");
+ }
+ }
+
+ if (ogm->srcpad == NULL) {
+ GList *l, *cached_events;
+
+ ogm->srcpad = gst_pad_new_from_template (ogm->srcpadtempl, "src");
+ gst_pad_use_fixed_caps (ogm->srcpad);
+ gst_pad_set_caps (ogm->srcpad, caps);
+ gst_pad_set_active (ogm->srcpad, TRUE);
+ gst_element_add_pad (GST_ELEMENT (ogm), ogm->srcpad);
+ GST_INFO_OBJECT (ogm, "Added pad %s:%s with caps %" GST_PTR_FORMAT,
+ GST_DEBUG_PAD_NAME (ogm->srcpad), caps);
+
+ GST_OBJECT_LOCK (ogm);
+ cached_events = ogm->cached_events;
+ ogm->cached_events = NULL;
+ GST_OBJECT_UNLOCK (ogm);
+
+ for (l = cached_events; l; l = l->next) {
+ GstEvent *event = GST_EVENT_CAST (l->data);
+
+ GST_DEBUG_OBJECT (ogm, "Pushing cached event %" GST_PTR_FORMAT, event);
+ gst_pad_push_event (ogm->srcpad, event);
+ }
+ g_list_free (cached_events);
+
+ {
+ GstTagList *tags;
+
+ tags = gst_tag_list_new ();
+ gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_SUBTITLE_CODEC,
+ "Ogm", NULL);
+ gst_element_found_tags_for_pad (GST_ELEMENT (ogm), ogm->srcpad, tags);
+ }
+ }
+
+ gst_caps_unref (caps);
+
+ return GST_FLOW_OK;
+
+/* ERRORS */
+buffer_too_small:
+ {
+ GST_ELEMENT_ERROR (ogm, STREAM, WRONG_TYPE, ("Buffer too small"), (NULL));
+ return GST_FLOW_ERROR;
+ }
+cannot_decode:
+ {
+ GST_ELEMENT_ERROR (ogm, STREAM, DECODE, (NULL), ("unknown ogm format"));
+ return GST_FLOW_ERROR;
+ }
+}
+
+static GstFlowReturn
+gst_ogm_parse_comment_packet (GstOgmParse * ogm, GstBuffer * buf)
+{
+ GstFlowReturn ret;
+
+ if (ogm->srcpad == NULL) {
+ GST_DEBUG ("no source pad");
+ return GST_FLOW_WRONG_STATE;
+ }
+
+ /* if this is not a subtitle stream, push the vorbiscomment packet
+ * on downstream, the respective decoder will handle it; if it is
+ * a subtitle stream, we will have to handle the comment ourself */
+ if (ogm->hdr.streamtype[0] == 't') {
+ GstTagList *tags;
+
+ tags = gst_tag_list_from_vorbiscomment_buffer (buf,
+ (guint8 *) "\003vorbis", 7, NULL);
+
+ if (tags) {
+ GST_DEBUG_OBJECT (ogm, "tags = %" GST_PTR_FORMAT, tags);
+ gst_element_found_tags_for_pad (GST_ELEMENT (ogm), ogm->srcpad, tags);
+ } else {
+ GST_DEBUG_OBJECT (ogm, "failed to extract tags from vorbis comment");
+ }
+ /* do not push packet downstream, just let parent unref it */
+ ret = GST_FLOW_OK;
+ } else {
+ buf = gst_buffer_copy (buf);
+ gst_buffer_set_caps (buf, GST_PAD_CAPS (ogm->srcpad));
+ ret = gst_pad_push (ogm->srcpad, buf);
+ }
+
+ return ret;
+}
+
+static void
+gst_ogm_text_parse_strip_trailing_zeroes (GstOgmParse * ogm, GstBuffer * buf)
+{
+ const guint8 *data;
+ guint size;
+
+ g_assert (gst_buffer_is_metadata_writable (buf));
+
+ /* zeroes are not valid UTF-8 characters, so strip them from output */
+ data = GST_BUFFER_DATA (buf);
+ size = GST_BUFFER_SIZE (buf);
+ while (size > 0 && data[size - 1] == '\0') {
+ --size;
+ }
+
+ GST_BUFFER_SIZE (buf) = size;
+}
+
+static GstFlowReturn
+gst_ogm_parse_data_packet (GstOgmParse * ogm, GstBuffer * buf)
+{
+ GstFlowReturn ret;
+ const guint8 *data;
+ GstBuffer *sbuf;
+ gboolean keyframe;
+ guint size, len, n, xsize = 0;
+
+ data = GST_BUFFER_DATA (buf);
+ size = GST_BUFFER_SIZE (buf);
+
+ if ((data[0] & 0x01) != 0)
+ goto invalid_startcode;
+
+ /* data - push on */
+ len = ((data[0] & 0xc0) >> 6) | ((data[0] & 0x02) << 1);
+ keyframe = (((data[0] & 0x08) >> 3) != 0);
+
+ if ((1 + len) > size)
+ goto buffer_too_small;
+
+ for (n = len; n > 0; n--) {
+ xsize = (xsize << 8) | data[n];
+ }
+
+ GST_LOG_OBJECT (ogm, "[0x%02x] samples: %d, hdrbytes: %d, datasize: %d",
+ data[0], xsize, len, size - len - 1);
+
+ sbuf = gst_buffer_create_sub (buf, len + 1, size - len - 1);
+
+ if (GST_BUFFER_OFFSET_END_IS_VALID (buf))
+ ogm->next_granulepos = GST_BUFFER_OFFSET_END (buf);
+
+ switch (ogm->hdr.streamtype[0]) {
+ case 't':
+ case 'v':{
+ GstClockTime ts, next_ts;
+ guint samples;
+
+ samples = (ogm->hdr.streamtype[0] == 'v') ? 1 : xsize;
+
+ if (!keyframe) {
+ GST_BUFFER_FLAG_SET (sbuf, GST_BUFFER_FLAG_DELTA_UNIT);
+ }
+
+ /* shouldn't this be granulepos - samples? (tpm) */
+ ts = gst_util_uint64_scale (ogm->next_granulepos,
+ ogm->hdr.time_unit * GST_SECOND, 10000000);
+ next_ts = gst_util_uint64_scale (ogm->next_granulepos + samples,
+ ogm->hdr.time_unit * GST_SECOND, 10000000);
+
+ GST_BUFFER_TIMESTAMP (sbuf) = ts;
+ GST_BUFFER_DURATION (sbuf) = next_ts - ts;
+
+ ogm->next_granulepos += samples;
+
+ if (ogm->hdr.streamtype[0] == 't') {
+ gst_ogm_text_parse_strip_trailing_zeroes (ogm, sbuf);
+ }
+ break;
+ }
+ case 'a':{
+ GstClockTime ts, next_ts;
+
+ /* shouldn't this be granulepos - samples? (tpm) */
+ ts = gst_util_uint64_scale_int (ogm->next_granulepos,
+ GST_SECOND, ogm->hdr.samples_per_unit);
+ next_ts = gst_util_uint64_scale_int (ogm->next_granulepos + xsize,
+ GST_SECOND, ogm->hdr.samples_per_unit);
+
+ GST_BUFFER_TIMESTAMP (sbuf) = ts;
+ GST_BUFFER_DURATION (sbuf) = next_ts - ts;
+
+ ogm->next_granulepos += xsize;
+ break;
+ }
+ default:
+ g_assert_not_reached ();
+ break;
+ }
+
+ if (ogm->srcpad) {
+ gst_buffer_set_caps (sbuf, GST_PAD_CAPS (ogm->srcpad));
+ GST_LOG_OBJECT (ogm, "Pushing buffer with ts=%" GST_TIME_FORMAT,
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (sbuf)));
+ ret = gst_pad_push (ogm->srcpad, sbuf);
+ if (ret != GST_FLOW_OK) {
+ GST_DEBUG_OBJECT (ogm, "Flow on %s:%s = %s",
+ GST_DEBUG_PAD_NAME (ogm->srcpad), gst_flow_get_name (ret));
+ }
+ } else {
+ ret = GST_FLOW_WRONG_STATE;
+ }
+
+ return ret;
+
+/* ERRORS */
+invalid_startcode:
+ {
+ GST_ELEMENT_ERROR (ogm, STREAM, DECODE, (NULL),
+ ("unexpected packet startcode 0x%02x", data[0]));
+ return GST_FLOW_ERROR;
+ }
+buffer_too_small:
+ {
+ GST_ELEMENT_ERROR (ogm, STREAM, DECODE, (NULL),
+ ("buffer too small, len+1=%u, size=%u", len + 1, size));
+ return GST_FLOW_ERROR;
+ }
+}
+
+static GstFlowReturn
+gst_ogm_parse_chain (GstPad * pad, GstBuffer * buf)
+{
+ GstFlowReturn ret = GST_FLOW_OK;
+ GstOgmParse *ogm = GST_OGM_PARSE (GST_PAD_PARENT (pad));
+ guint8 *data = GST_BUFFER_DATA (buf);
+ guint size = GST_BUFFER_SIZE (buf);
+
+ if (size < 1)
+ goto buffer_too_small;
+
+ GST_LOG_OBJECT (ogm, "Packet with start code 0x%02x", data[0]);
+
+ switch (data[0]) {
+ case 0x01:{
+ ret = gst_ogm_parse_stream_header (ogm, data + 1, size - 1);
+ break;
+ }
+ case 0x03:{
+ ret = gst_ogm_parse_comment_packet (ogm, buf);
+ break;
+ }
+ default:{
+ ret = gst_ogm_parse_data_packet (ogm, buf);
+ break;
+ }
+ }
+
+ gst_buffer_unref (buf);
+
+ if (ret != GST_FLOW_OK) {
+ GST_DEBUG_OBJECT (ogm, "Flow: %s", gst_flow_get_name (ret));
+ }
+
+ return ret;
+
+/* ERRORS */
+buffer_too_small:
+ {
+ GST_ELEMENT_ERROR (ogm, STREAM, DECODE, (NULL), ("buffer too small"));
+ gst_buffer_unref (buf);
+ return GST_FLOW_ERROR;
+ }
+}
+
+static gboolean
+gst_ogm_parse_sink_event (GstPad * pad, GstEvent * event)
+{
+ GstOgmParse *ogm = GST_OGM_PARSE (gst_pad_get_parent (pad));
+ gboolean res;
+
+ GST_LOG_OBJECT (ogm, "processing %s event", GST_EVENT_TYPE_NAME (event));
+
+ GST_OBJECT_LOCK (ogm);
+ if (ogm->srcpad == NULL) {
+ ogm->cached_events = g_list_append (ogm->cached_events, event);
+ GST_OBJECT_UNLOCK (ogm);
+ res = TRUE;
+ } else {
+ GST_OBJECT_UNLOCK (ogm);
+ res = gst_pad_event_default (pad, event);
+ }
+
+ gst_object_unref (ogm);
+ return res;
+}
+
+static GstStateChangeReturn
+gst_ogm_parse_change_state (GstElement * element, GstStateChange transition)
+{
+ GstStateChangeReturn ret;
+ GstOgmParse *ogm = GST_OGM_PARSE (element);
+
+ ret = parent_class->change_state (element, transition);
+ if (ret != GST_STATE_CHANGE_SUCCESS)
+ return ret;
+
+ switch (transition) {
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ if (ogm->srcpad) {
+ gst_pad_set_active (ogm->srcpad, FALSE);
+ gst_element_remove_pad (element, ogm->srcpad);
+ ogm->srcpad = NULL;
+ }
+ memset (&ogm->hdr, 0, sizeof (ogm->hdr));
+ ogm->next_granulepos = 0;
+ g_list_foreach (ogm->cached_events, (GFunc) gst_mini_object_unref, NULL);
+ g_list_free (ogm->cached_events);
+ ogm->cached_events = NULL;
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+gboolean
+gst_ogm_parse_plugin_init (GstPlugin * plugin)
+{
+ gst_riff_init ();
+
+ GST_DEBUG_CATEGORY_INIT (gst_ogm_parse_debug, "ogmparse", 0, "ogm parser");
+
+ return gst_element_register (plugin, "ogmaudioparse", GST_RANK_PRIMARY,
+ GST_TYPE_OGM_AUDIO_PARSE) &&
+ gst_element_register (plugin, "ogmvideoparse", GST_RANK_PRIMARY,
+ GST_TYPE_OGM_VIDEO_PARSE) &&
+ gst_element_register (plugin, "ogmtextparse", GST_RANK_PRIMARY,
+ GST_TYPE_OGM_TEXT_PARSE);
+}
projects / mafwsubrenderer / blobdiff