/* GStreamer * Copyright (C) <2004> Thomas Vander Stichele * Copyright (C) 2006 Andy Wingo * * 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. */ /** * SECTION:element-vorbisparse * @short_description: parses vorbis streams * @see_also: vorbisdec, oggdemux, theoraparse * * * * The vorbisparse element will parse the header packets of the Vorbis * stream and put them as the streamheader in the caps. This is used in the * multifdsink case where you want to stream live vorbis streams to multiple * clients, each client has to receive the streamheaders first before they can * consume the vorbis packets. * * * This element also makes sure that the buffers that it pushes out are properly * timestamped and that their offset and offset_end are set. The buffers that * vorbisparse outputs have all of the metadata that oggmux expects to receive, * which allows you to (for example) remux an ogg/vorbis file. * * Example pipelines * * * gst-launch -v filesrc location=sine.ogg ! oggdemux ! vorbisparse ! fakesink * * This pipeline shows that the streamheader is set in the caps, and that each * buffer has the timestamp, duration, offset, and offset_end set. * * * * gst-launch filesrc location=sine.ogg ! oggdemux ! vorbisparse \ * ! oggmux ! filesink location=sine-remuxed.ogg * * This pipeline shows remuxing. sine-remuxed.ogg might not be exactly the same * as sine.ogg, but they should produce exactly the same decoded data. * * * * Last reviewed on 2006-04-01 (0.10.4.1) */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include "vorbisparse.h" GST_DEBUG_CATEGORY_EXTERN (vorbisparse_debug); #define GST_CAT_DEFAULT vorbisparse_debug static GstElementDetails vorbis_parse_details = { "VorbisParse", "Codec/Parser/Audio", "parse raw vorbis streams", "Thomas Vander Stichele " }; /* Filter signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0 }; static GstStaticPadTemplate vorbis_parse_sink_factory = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-vorbis") ); static GstStaticPadTemplate vorbis_parse_src_factory = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-vorbis") ); GST_BOILERPLATE (GstVorbisParse, gst_vorbis_parse, GstElement, GST_TYPE_ELEMENT); static GstFlowReturn vorbis_parse_chain (GstPad * pad, GstBuffer * buffer); static GstStateChangeReturn vorbis_parse_change_state (GstElement * element, GstStateChange transition); static gboolean vorbis_parse_sink_event (GstPad * pad, GstEvent * event); static gboolean vorbis_parse_src_query (GstPad * pad, GstQuery * query); static gboolean vorbis_parse_convert (GstPad * pad, GstFormat src_format, gint64 src_value, GstFormat * dest_format, gint64 * dest_value); static void gst_vorbis_parse_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&vorbis_parse_src_factory)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&vorbis_parse_sink_factory)); gst_element_class_set_details (element_class, &vorbis_parse_details); } static void gst_vorbis_parse_class_init (GstVorbisParseClass * klass) { GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass); gstelement_class->change_state = vorbis_parse_change_state; } static void gst_vorbis_parse_init (GstVorbisParse * parse, GstVorbisParseClass * g_class) { parse->sinkpad = gst_pad_new_from_static_template (&vorbis_parse_sink_factory, "sink"); gst_pad_set_chain_function (parse->sinkpad, vorbis_parse_chain); gst_pad_set_event_function (parse->sinkpad, vorbis_parse_sink_event); gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad); parse->srcpad = gst_pad_new_from_static_template (&vorbis_parse_src_factory, "src"); gst_pad_set_query_function (parse->srcpad, vorbis_parse_src_query); gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad); } static void vorbis_parse_set_header_on_caps (GstVorbisParse * parse, GstCaps * caps) { GstBuffer *buf1, *buf2, *buf3; GstStructure *structure; GValue array = { 0 }; GValue value = { 0 }; g_assert (parse); g_assert (parse->streamheader); g_assert (parse->streamheader->next); g_assert (parse->streamheader->next->next); buf1 = parse->streamheader->data; g_assert (buf1); buf2 = parse->streamheader->next->data; g_assert (buf2); buf3 = parse->streamheader->next->next->data; g_assert (buf3); structure = gst_caps_get_structure (caps, 0); /* mark buffers */ GST_BUFFER_FLAG_SET (buf1, GST_BUFFER_FLAG_IN_CAPS); GST_BUFFER_FLAG_SET (buf2, GST_BUFFER_FLAG_IN_CAPS); GST_BUFFER_FLAG_SET (buf3, GST_BUFFER_FLAG_IN_CAPS); /* put buffers in a fixed list */ g_value_init (&array, GST_TYPE_ARRAY); g_value_init (&value, GST_TYPE_BUFFER); gst_value_set_buffer (&value, buf1); gst_value_array_append_value (&array, &value); g_value_unset (&value); g_value_init (&value, GST_TYPE_BUFFER); gst_value_set_buffer (&value, buf2); gst_value_array_append_value (&array, &value); g_value_unset (&value); g_value_init (&value, GST_TYPE_BUFFER); gst_value_set_buffer (&value, buf3); gst_value_array_append_value (&array, &value); gst_structure_set_value (structure, "streamheader", &array); g_value_unset (&value); g_value_unset (&array); } static void vorbis_parse_push_headers (GstVorbisParse * parse) { /* mark and put on caps */ GstCaps *caps; GstBuffer *outbuf; ogg_packet packet; /* get the headers into the caps, passing them to vorbis as we go */ caps = gst_caps_make_writable (gst_pad_get_caps (parse->srcpad)); vorbis_parse_set_header_on_caps (parse, caps); GST_DEBUG_OBJECT (parse, "here are the caps: %" GST_PTR_FORMAT, caps); gst_pad_set_caps (parse->srcpad, caps); gst_caps_unref (caps); /* push out buffers, ignoring return value... */ outbuf = GST_BUFFER_CAST (parse->streamheader->data); packet.packet = GST_BUFFER_DATA (outbuf); packet.bytes = GST_BUFFER_SIZE (outbuf); packet.granulepos = GST_BUFFER_OFFSET_END (outbuf); packet.packetno = 1; packet.e_o_s = 0; vorbis_synthesis_headerin (&parse->vi, &parse->vc, &packet); parse->sample_rate = parse->vi.rate; gst_buffer_set_caps (outbuf, GST_PAD_CAPS (parse->srcpad)); gst_pad_push (parse->srcpad, outbuf); outbuf = GST_BUFFER_CAST (parse->streamheader->next->data); packet.packet = GST_BUFFER_DATA (outbuf); packet.bytes = GST_BUFFER_SIZE (outbuf); packet.granulepos = GST_BUFFER_OFFSET_END (outbuf); packet.packetno = 2; packet.e_o_s = 0; vorbis_synthesis_headerin (&parse->vi, &parse->vc, &packet); gst_buffer_set_caps (outbuf, GST_PAD_CAPS (parse->srcpad)); gst_pad_push (parse->srcpad, outbuf); outbuf = GST_BUFFER_CAST (parse->streamheader->next->next->data); packet.packet = GST_BUFFER_DATA (outbuf); packet.bytes = GST_BUFFER_SIZE (outbuf); packet.granulepos = GST_BUFFER_OFFSET_END (outbuf); packet.packetno = 3; packet.e_o_s = 0; vorbis_synthesis_headerin (&parse->vi, &parse->vc, &packet); gst_buffer_set_caps (outbuf, GST_PAD_CAPS (parse->srcpad)); gst_pad_push (parse->srcpad, outbuf); g_list_free (parse->streamheader); parse->streamheader = NULL; parse->streamheader_sent = TRUE; } static void vorbis_parse_clear_queue (GstVorbisParse * parse) { while (parse->buffer_queue->length) { GstBuffer *buf; buf = GST_BUFFER_CAST (g_queue_pop_head (parse->buffer_queue)); gst_buffer_unref (buf); } } static GstFlowReturn vorbis_parse_push_buffer (GstVorbisParse * parse, GstBuffer * buf, gint64 granulepos) { guint64 samples; /* our hack as noted below */ samples = GST_BUFFER_OFFSET (buf); GST_BUFFER_OFFSET_END (buf) = granulepos; GST_BUFFER_DURATION (buf) = samples * GST_SECOND / parse->sample_rate; GST_BUFFER_OFFSET (buf) = granulepos * GST_SECOND / parse->sample_rate; GST_BUFFER_TIMESTAMP (buf) = GST_BUFFER_OFFSET (buf) - GST_BUFFER_DURATION (buf); gst_buffer_set_caps (buf, GST_PAD_CAPS (parse->srcpad)); return gst_pad_push (parse->srcpad, buf); } static GstFlowReturn vorbis_parse_drain_queue_prematurely (GstVorbisParse * parse) { GstFlowReturn ret = GST_FLOW_OK; gint64 granulepos = MAX (parse->prev_granulepos, 0); /* got an EOS event, make sure to push out any buffers that were in the queue * -- won't normally be the case, but this catches the * didn't-get-a-granulepos-on-the-last-packet case. Assuming a continuous * stream. */ while (!g_queue_is_empty (parse->buffer_queue)) { GstBuffer *buf; buf = GST_BUFFER_CAST (g_queue_pop_head (parse->buffer_queue)); granulepos += GST_BUFFER_OFFSET (buf); ret = vorbis_parse_push_buffer (parse, buf, granulepos); if (ret != GST_FLOW_OK) goto done; } parse->prev_granulepos = granulepos; done: return ret; } static GstFlowReturn vorbis_parse_drain_queue (GstVorbisParse * parse, gint64 granulepos) { GstFlowReturn ret = GST_FLOW_OK; GList *walk; gint64 cur = granulepos; gint64 gp; for (walk = parse->buffer_queue->head; walk; walk = walk->next) cur -= GST_BUFFER_OFFSET (walk->data); if (parse->prev_granulepos != -1) cur = MAX (cur, parse->prev_granulepos); while (!g_queue_is_empty (parse->buffer_queue)) { GstBuffer *buf; buf = GST_BUFFER_CAST (g_queue_pop_head (parse->buffer_queue)); cur += GST_BUFFER_OFFSET (buf); gp = CLAMP (cur, 0, granulepos); ret = vorbis_parse_push_buffer (parse, buf, gp); if (ret != GST_FLOW_OK) goto done; } parse->prev_granulepos = granulepos; done: return ret; } static GstFlowReturn vorbis_parse_queue_buffer (GstVorbisParse * parse, GstBuffer * buf) { GstFlowReturn ret = GST_FLOW_OK; long blocksize; ogg_packet packet; buf = gst_buffer_make_metadata_writable (buf); packet.packet = GST_BUFFER_DATA (buf); packet.bytes = GST_BUFFER_SIZE (buf); packet.granulepos = GST_BUFFER_OFFSET_END (buf); packet.packetno = parse->packetno + parse->buffer_queue->length; packet.e_o_s = 0; blocksize = vorbis_packet_blocksize (&parse->vi, &packet); /* temporarily store the sample count in OFFSET -- we overwrite this later */ if (parse->prev_blocksize < 0) GST_BUFFER_OFFSET (buf) = 0; else GST_BUFFER_OFFSET (buf) = (blocksize + parse->prev_blocksize) / 4; parse->prev_blocksize = blocksize; g_queue_push_tail (parse->buffer_queue, buf); if (GST_BUFFER_OFFSET_END_IS_VALID (buf)) ret = vorbis_parse_drain_queue (parse, GST_BUFFER_OFFSET_END (buf)); return ret; } static GstFlowReturn vorbis_parse_chain (GstPad * pad, GstBuffer * buffer) { GstFlowReturn ret; GstBuffer *buf; GstVorbisParse *parse; parse = GST_VORBIS_PARSE (gst_pad_get_parent (pad)); buf = GST_BUFFER (buffer); parse->packetno++; if (parse->packetno <= 3) { /* if 1 <= packetno <= 3, it's streamheader, * so put it on the streamheader list and return */ parse->streamheader = g_list_append (parse->streamheader, buf); ret = GST_FLOW_OK; } else { if (!parse->streamheader_sent) vorbis_parse_push_headers (parse); ret = vorbis_parse_queue_buffer (parse, buf); } gst_object_unref (parse); return ret; } static gboolean vorbis_parse_sink_event (GstPad * pad, GstEvent * event) { gboolean ret; GstVorbisParse *parse; parse = GST_VORBIS_PARSE (gst_pad_get_parent (pad)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_FLUSH_START: vorbis_parse_clear_queue (parse); parse->prev_granulepos = -1; parse->prev_blocksize = -1; ret = gst_pad_event_default (pad, event); break; case GST_EVENT_EOS: vorbis_parse_drain_queue_prematurely (parse); ret = gst_pad_event_default (pad, event); break; default: ret = gst_pad_event_default (pad, event); break; } gst_object_unref (parse); return ret; } static gboolean vorbis_parse_convert (GstPad * pad, GstFormat src_format, gint64 src_value, GstFormat * dest_format, gint64 * dest_value) { gboolean res = TRUE; GstVorbisParse *parse; guint64 scale = 1; parse = GST_VORBIS_PARSE (GST_PAD_PARENT (pad)); /* fixme: assumes atomic access to lots of instance variables modified from * the streaming thread, including 64-bit variables */ if (parse->packetno < 4) return FALSE; if (src_format == *dest_format) { *dest_value = src_value; return TRUE; } if (parse->sinkpad == pad && (src_format == GST_FORMAT_BYTES || *dest_format == GST_FORMAT_BYTES)) return FALSE; switch (src_format) { case GST_FORMAT_TIME: switch (*dest_format) { case GST_FORMAT_BYTES: scale = sizeof (float) * parse->vi.channels; case GST_FORMAT_DEFAULT: *dest_value = scale * gst_util_uint64_scale_int (src_value, parse->vi.rate, GST_SECOND); break; default: res = FALSE; } break; case GST_FORMAT_DEFAULT: switch (*dest_format) { case GST_FORMAT_BYTES: *dest_value = src_value * sizeof (float) * parse->vi.channels; break; case GST_FORMAT_TIME: *dest_value = gst_util_uint64_scale_int (src_value, GST_SECOND, parse->vi.rate); break; default: res = FALSE; } break; case GST_FORMAT_BYTES: switch (*dest_format) { case GST_FORMAT_DEFAULT: *dest_value = src_value / (sizeof (float) * parse->vi.channels); break; case GST_FORMAT_TIME: *dest_value = gst_util_uint64_scale_int (src_value, GST_SECOND, parse->vi.rate * sizeof (float) * parse->vi.channels); break; default: res = FALSE; } break; default: res = FALSE; } return res; } static gboolean vorbis_parse_src_query (GstPad * pad, GstQuery * query) { gint64 granulepos; GstVorbisParse *parse; gboolean res = FALSE; parse = GST_VORBIS_PARSE (GST_PAD_PARENT (pad)); switch (GST_QUERY_TYPE (query)) { case GST_QUERY_POSITION: { GstFormat format; gint64 value; granulepos = parse->prev_granulepos; gst_query_parse_position (query, &format, NULL); /* and convert to the final format */ if (!(res = vorbis_parse_convert (pad, GST_FORMAT_DEFAULT, granulepos, &format, &value))) goto error; /* fixme: support segments value = (value - parse->segment_start) + parse->segment_time; */ gst_query_set_position (query, format, value); GST_LOG_OBJECT (parse, "query %u: peer returned granulepos: %llu - we return %llu (format %u)", query, granulepos, value, format); break; } case GST_QUERY_DURATION: { /* fixme: not threadsafe */ /* query peer for total length */ if (!gst_pad_is_linked (parse->sinkpad)) { GST_WARNING_OBJECT (parse, "sink pad %" GST_PTR_FORMAT " is not linked", parse->sinkpad); goto error; } if (!(res = gst_pad_query (GST_PAD_PEER (parse->sinkpad), query))) goto error; break; } case GST_QUERY_CONVERT: { GstFormat src_fmt, dest_fmt; gint64 src_val, dest_val; gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val); if (!(res = vorbis_parse_convert (pad, src_fmt, src_val, &dest_fmt, &dest_val))) goto error; gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val); break; } default: res = gst_pad_query_default (pad, query); break; } return res; error: { GST_WARNING_OBJECT (parse, "error handling query"); return res; } } static GstStateChangeReturn vorbis_parse_change_state (GstElement * element, GstStateChange transition) { GstVorbisParse *parse = GST_VORBIS_PARSE (element); GstStateChangeReturn ret; switch (transition) { case GST_STATE_CHANGE_READY_TO_PAUSED: vorbis_info_init (&parse->vi); vorbis_comment_init (&parse->vc); parse->prev_granulepos = -1; parse->prev_blocksize = -1; parse->packetno = 0; parse->streamheader_sent = FALSE; parse->buffer_queue = g_queue_new (); break; default: break; } ret = parent_class->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: vorbis_info_clear (&parse->vi); vorbis_comment_clear (&parse->vc); vorbis_parse_clear_queue (parse); g_queue_free (parse->buffer_queue); parse->buffer_queue = NULL; break; default: break; } return ret; }