/* -*- Mode: C; tab-width: 2; indent-tabs-mode: t; c-basic-offset: 2 -*- */ /* GStreamer * Copyright (C) <1999> Erik Walthinsen * * 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 #include static void gst_wavparse_base_init (gpointer g_class); static void gst_wavparse_class_init (GstWavParseClass * klass); static void gst_wavparse_init (GstWavParse * wavparse); static GstElementStateReturn gst_wavparse_change_state (GstElement * element); static const GstFormat *gst_wavparse_get_formats (GstPad * pad); static const GstQueryType *gst_wavparse_get_query_types (GstPad * pad); static gboolean gst_wavparse_pad_query (GstPad * pad, GstQueryType type, GstFormat * format, gint64 * value); static gboolean gst_wavparse_pad_convert (GstPad * pad, GstFormat src_format, gint64 src_value, GstFormat * dest_format, gint64 * dest_value); static void gst_wavparse_loop (GstElement * element); static const GstEventMask *gst_wavparse_get_event_masks (GstPad * pad); static gboolean gst_wavparse_srcpad_event (GstPad * pad, GstEvent * event); static void gst_wavparse_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); /* elementfactory information */ static GstElementDetails gst_wavparse_details = GST_ELEMENT_DETAILS (".wav demuxer", "Codec/Demuxer", "Parse a .wav file into raw audio", "Erik Walthinsen "); static GstStaticPadTemplate sink_template_factory = GST_STATIC_PAD_TEMPLATE ("wavparse_sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-wav") ); static GstStaticPadTemplate src_template_factory = GST_STATIC_PAD_TEMPLATE ("wavparse_src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-raw-int, " "endianness = (int) little_endian, " "signed = (boolean) { true, false }, " "width = (int) { 8, 16 }, " "depth = (int) { 8, 16 }, " "rate = (int) [ 8000, 48000 ], " "channels = (int) [ 1, 2 ]; " "audio/mpeg, " "mpegversion = (int) 1, " "layer = (int) [ 1, 3 ], " "rate = (int) [ 8000, 48000 ], " "channels = (int) [ 1, 2 ]; " "audio/x-alaw, " "rate = (int) [ 8000, 48000 ], " "channels = (int) [ 1, 2 ]; " "audio/x-mulaw, " "rate = (int) [ 8000, 48000 ], " "channels = (int) [ 1, 2 ]") ); /* WavParse signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { PROP_0, }; static GstElementClass *parent_class = NULL; /*static guint gst_wavparse_signals[LAST_SIGNAL] = { 0 }; */ GType gst_wavparse_get_type (void) { static GType wavparse_type = 0; if (!wavparse_type) { static const GTypeInfo wavparse_info = { sizeof (GstWavParseClass), gst_wavparse_base_init, NULL, (GClassInitFunc) gst_wavparse_class_init, NULL, NULL, sizeof (GstWavParse), 0, (GInstanceInitFunc) gst_wavparse_init, }; wavparse_type = g_type_register_static (GST_TYPE_ELEMENT, "GstWavParse", &wavparse_info, 0); } return wavparse_type; } static void gst_wavparse_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_set_details (element_class, &gst_wavparse_details); /* register src pads */ gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&sink_template_factory)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&src_template_factory)); } static void gst_wavparse_class_init (GstWavParseClass * klass) { GstElementClass *gstelement_class; GObjectClass *object_class; gstelement_class = (GstElementClass *) klass; object_class = (GObjectClass *) klass; parent_class = g_type_class_ref (GST_TYPE_ELEMENT); object_class->get_property = gst_wavparse_get_property; gstelement_class->change_state = gst_wavparse_change_state; } static void gst_wavparse_init (GstWavParse * wavparse) { /* sink */ wavparse->sinkpad = gst_pad_new_from_template (gst_static_pad_template_get (&sink_template_factory), "sink"); gst_element_add_pad (GST_ELEMENT (wavparse), wavparse->sinkpad); gst_pad_set_formats_function (wavparse->sinkpad, gst_wavparse_get_formats); gst_pad_set_convert_function (wavparse->sinkpad, gst_wavparse_pad_convert); gst_pad_set_query_type_function (wavparse->sinkpad, gst_wavparse_get_query_types); gst_pad_set_query_function (wavparse->sinkpad, gst_wavparse_pad_query); /* source */ wavparse->srcpad = gst_pad_new_from_template (gst_static_pad_template_get (&src_template_factory), "src"); gst_pad_use_explicit_caps (wavparse->srcpad); gst_element_add_pad (GST_ELEMENT (wavparse), wavparse->srcpad); gst_pad_set_formats_function (wavparse->srcpad, gst_wavparse_get_formats); gst_pad_set_convert_function (wavparse->srcpad, gst_wavparse_pad_convert); gst_pad_set_query_type_function (wavparse->srcpad, gst_wavparse_get_query_types); gst_pad_set_query_function (wavparse->srcpad, gst_wavparse_pad_query); gst_pad_set_event_function (wavparse->srcpad, gst_wavparse_srcpad_event); gst_pad_set_event_mask_function (wavparse->srcpad, gst_wavparse_get_event_masks); gst_element_set_loop_function (GST_ELEMENT (wavparse), gst_wavparse_loop); wavparse->state = GST_WAVPARSE_UNKNOWN; wavparse->bps = 0; wavparse->seek_pending = FALSE; wavparse->seek_offset = 0; } static void gst_wavparse_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstWavParse *wavparse; wavparse = GST_WAVPARSE (object); switch (prop_id) { default: break; } } #if 0 static void gst_wavparse_parse_adtl (GstWavParse * wavparse, int len) { guint32 got_bytes; GstByteStream *bs = wavparse->bs; gst_riff_chunk *temp_chunk, chunk; guint8 *tempdata; struct _gst_riff_labl labl, *temp_labl; struct _gst_riff_ltxt ltxt, *temp_ltxt; struct _gst_riff_note note, *temp_note; char *label_name; GstProps *props; GstPropsEntry *entry; GstCaps *new_caps; GList *caps = NULL; props = wavparse->metadata->properties; while (len > 0) { got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, sizeof (gst_riff_chunk)); if (got_bytes != sizeof (gst_riff_chunk)) { return; } temp_chunk = (gst_riff_chunk *) tempdata; chunk.id = GUINT32_FROM_LE (temp_chunk->id); chunk.size = GUINT32_FROM_LE (temp_chunk->size); if (chunk.size == 0) { gst_bytestream_flush (bs, sizeof (gst_riff_chunk)); len -= sizeof (gst_riff_chunk); continue; } switch (chunk.id) { case GST_RIFF_adtl_labl: got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, sizeof (struct _gst_riff_labl)); if (got_bytes != sizeof (struct _gst_riff_labl)) { return; } temp_labl = (struct _gst_riff_labl *) tempdata; labl.id = GUINT32_FROM_LE (temp_labl->id); labl.size = GUINT32_FROM_LE (temp_labl->size); labl.identifier = GUINT32_FROM_LE (temp_labl->identifier); gst_bytestream_flush (bs, sizeof (struct _gst_riff_labl)); len -= sizeof (struct _gst_riff_labl); got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, labl.size - 4); if (got_bytes != labl.size - 4) { return; } label_name = (char *) tempdata; gst_bytestream_flush (bs, ((labl.size - 4) + 1) & ~1); len -= (((labl.size - 4) + 1) & ~1); new_caps = gst_caps_new ("label", "application/x-gst-metadata", gst_props_new ("identifier", G_TYPE_INT (labl.identifier), "name", G_TYPE_STRING (label_name), NULL)); if (gst_props_get (props, "labels", &caps, NULL)) { caps = g_list_append (caps, new_caps); } else { caps = g_list_append (NULL, new_caps); entry = gst_props_entry_new ("labels", GST_PROPS_GLIST (caps)); gst_props_add_entry (props, entry); } break; case GST_RIFF_adtl_ltxt: got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, sizeof (struct _gst_riff_ltxt)); if (got_bytes != sizeof (struct _gst_riff_ltxt)) { return; } temp_ltxt = (struct _gst_riff_ltxt *) tempdata; ltxt.id = GUINT32_FROM_LE (temp_ltxt->id); ltxt.size = GUINT32_FROM_LE (temp_ltxt->size); ltxt.identifier = GUINT32_FROM_LE (temp_ltxt->identifier); ltxt.length = GUINT32_FROM_LE (temp_ltxt->length); ltxt.purpose = GUINT32_FROM_LE (temp_ltxt->purpose); ltxt.country = GUINT16_FROM_LE (temp_ltxt->country); ltxt.language = GUINT16_FROM_LE (temp_ltxt->language); ltxt.dialect = GUINT16_FROM_LE (temp_ltxt->dialect); ltxt.codepage = GUINT16_FROM_LE (temp_ltxt->codepage); gst_bytestream_flush (bs, sizeof (struct _gst_riff_ltxt)); len -= sizeof (struct _gst_riff_ltxt); if (ltxt.size - 20 > 0) { got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, ltxt.size - 20); if (got_bytes != ltxt.size - 20) { return; } gst_bytestream_flush (bs, ((ltxt.size - 20) + 1) & ~1); len -= (((ltxt.size - 20) + 1) & ~1); label_name = (char *) tempdata; } else { label_name = ""; } new_caps = gst_caps_new ("ltxt", "application/x-gst-metadata", gst_props_new ("identifier", G_TYPE_INT (ltxt.identifier), "name", G_TYPE_STRING (label_name), "length", G_TYPE_INT (ltxt.length), NULL)); if (gst_props_get (props, "ltxts", &caps, NULL)) { caps = g_list_append (caps, new_caps); } else { caps = g_list_append (NULL, new_caps); entry = gst_props_entry_new ("ltxts", GST_PROPS_GLIST (caps)); gst_props_add_entry (props, entry); } break; case GST_RIFF_adtl_note: got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, sizeof (struct _gst_riff_note)); if (got_bytes != sizeof (struct _gst_riff_note)) { return; } temp_note = (struct _gst_riff_note *) tempdata; note.id = GUINT32_FROM_LE (temp_note->id); note.size = GUINT32_FROM_LE (temp_note->size); note.identifier = GUINT32_FROM_LE (temp_note->identifier); gst_bytestream_flush (bs, sizeof (struct _gst_riff_note)); len -= sizeof (struct _gst_riff_note); got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, note.size - 4); if (got_bytes != note.size - 4) { return; } gst_bytestream_flush (bs, ((note.size - 4) + 1) & ~1); len -= (((note.size - 4) + 1) & ~1); label_name = (char *) tempdata; new_caps = gst_caps_new ("note", "application/x-gst-metadata", gst_props_new ("identifier", G_TYPE_INT (note.identifier), "name", G_TYPE_STRING (label_name), NULL)); if (gst_props_get (props, "notes", &caps, NULL)) { caps = g_list_append (caps, new_caps); } else { caps = g_list_append (NULL, new_caps); entry = gst_props_entry_new ("notes", GST_PROPS_GLIST (caps)); gst_props_add_entry (props, entry); } break; default: g_print ("Unknown chunk: " GST_FOURCC_FORMAT "\n", GST_FOURCC_ARGS (chunk.id)); return; } } g_object_notify (G_OBJECT (wavparse), "metadata"); } #endif #if 0 static void gst_wavparse_parse_info (GstWavParse * wavparse, int len) { gst_riff_chunk *temp_chunk, chunk; GstByteStream *bs = wavparse->bs; guint8 *tempdata; guint32 got_bytes; char *name, *type; while (len > 0) { got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, sizeof (gst_riff_chunk)); temp_chunk = (gst_riff_chunk *) tempdata; chunk.id = GUINT32_FROM_LE (temp_chunk->id); chunk.size = GUINT32_FROM_LE (temp_chunk->size); gst_bytestream_flush (bs, sizeof (gst_riff_chunk)); if (got_bytes != sizeof (gst_riff_chunk)) { return; } /* move our pointer on past the header */ len -= sizeof (gst_riff_chunk); if (chunk.size == 0) { continue; } got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, chunk.size); name = (char *) tempdata; if (got_bytes != chunk.size) { return; } /* move our pointer on past the data ... on an even boundary */ gst_bytestream_flush (bs, (chunk.size + 1) & ~1); len -= ((chunk.size + 1) & ~1); /* We now have an info string in 'name' of type chunk.id - find type */ switch (chunk.id) { case GST_RIFF_INFO_IARL: type = "Location"; break; case GST_RIFF_INFO_IART: type = "Artist"; break; case GST_RIFF_INFO_ICMS: type = "Commissioner"; break; case GST_RIFF_INFO_ICMT: type = "Comment"; break; case GST_RIFF_INFO_ICOP: type = "Copyright"; break; case GST_RIFF_INFO_ICRD: type = "Creation Date"; break; case GST_RIFF_INFO_IENG: type = "Engineer"; break; case GST_RIFF_INFO_IGNR: type = "Genre"; break; case GST_RIFF_INFO_IKEY: type = "Keywords"; break; case GST_RIFF_INFO_INAM: type = "Title"; /* name */ break; case GST_RIFF_INFO_IPRD: type = "Product"; break; case GST_RIFF_INFO_ISBJ: type = "Subject"; break; case GST_RIFF_INFO_ISFT: type = "Software"; break; case GST_RIFF_INFO_ITCH: type = "Technician"; break; default: g_print ("Unknown: %4.4s\n", (char *) &chunk.id); type = NULL; break; } if (type) { GstPropsEntry *entry; entry = gst_props_entry_new (type, G_TYPE_STRING (name)); gst_props_add_entry (wavparse->metadata->properties, entry); } } g_object_notify (G_OBJECT (wavparse), "metadata"); } #endif #if 0 static void gst_wavparse_parse_cues (GstWavParse * wavparse, int len) { guint32 got_bytes; GstByteStream *bs = wavparse->bs; struct _gst_riff_cue *temp_cue, cue; struct _gst_riff_cuepoints *points; guint8 *tempdata; int i; GList *cues = NULL; GstPropsEntry *entry; while (len > 0) { int required; got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, sizeof (struct _gst_riff_cue)); temp_cue = (struct _gst_riff_cue *) tempdata; /* fixup for our big endian friends */ cue.id = GUINT32_FROM_LE (temp_cue->id); cue.size = GUINT32_FROM_LE (temp_cue->size); cue.cuepoints = GUINT32_FROM_LE (temp_cue->cuepoints); gst_bytestream_flush (bs, sizeof (struct _gst_riff_cue)); if (got_bytes != sizeof (struct _gst_riff_cue)) { return; } len -= sizeof (struct _gst_riff_cue); /* -4 because cue.size contains the cuepoints size and we've already flushed that out of the system */ required = cue.size - 4; got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, required); gst_bytestream_flush (bs, ((required) + 1) & ~1); if (got_bytes != required) { return; } len -= (((cue.size - 4) + 1) & ~1); /* now we have an array of struct _gst_riff_cuepoints in tempdata */ points = (struct _gst_riff_cuepoints *) tempdata; for (i = 0; i < cue.cuepoints; i++) { GstCaps *caps; caps = gst_caps_new ("cues", "application/x-gst-metadata", gst_props_new ("identifier", G_TYPE_INT (points[i].identifier), "position", G_TYPE_INT (points[i].offset), NULL)); cues = g_list_append (cues, caps); } entry = gst_props_entry_new ("cues", GST_PROPS_GLIST (cues)); gst_props_add_entry (wavparse->metadata->properties, entry); } g_object_notify (G_OBJECT (wavparse), "metadata"); } #endif static void gst_wavparse_parse_fmt (GstWavParse * wavparse, guint size) { GstWavParseFormat *format; GstCaps *caps = NULL; guint8 *fmtdata; GstByteStream *bs = wavparse->bs; guint32 got_bytes; got_bytes = gst_bytestream_peek_bytes (bs, &fmtdata, sizeof (GstWavParseFormat)); format = (GstWavParseFormat *) fmtdata; if (got_bytes == sizeof (GstWavParseFormat)) { gst_bytestream_flush (bs, size); wavparse->bps = GUINT16_FROM_LE (format->wBlockAlign); wavparse->rate = GUINT32_FROM_LE (format->dwSamplesPerSec); wavparse->channels = GUINT16_FROM_LE (format->wChannels); wavparse->width = GUINT16_FROM_LE (format->wBitsPerSample); wavparse->format = GINT16_FROM_LE (format->wFormatTag); /* set the caps on the src pad */ /* FIXME: handle all of the other formats as well */ switch (wavparse->format) { case GST_RIFF_WAVE_FORMAT_ALAW: case GST_RIFF_WAVE_FORMAT_MULAW:{ char *mime = (wavparse->format == GST_RIFF_WAVE_FORMAT_ALAW) ? "audio/x-alaw" : "audio/x-mulaw"; if (wavparse->width != 8) { g_warning ("Ignoring invalid width %d", wavparse->width); return; } caps = gst_caps_new_simple (mime, "rate", G_TYPE_INT, wavparse->rate, "channels", G_TYPE_INT, wavparse->channels, NULL); } break; case GST_RIFF_WAVE_FORMAT_PCM: caps = gst_caps_new_simple ("audio/x-raw-int", "endianness", G_TYPE_INT, G_LITTLE_ENDIAN, "signed", G_TYPE_BOOLEAN, (wavparse->width > 8) ? TRUE : FALSE, "width", G_TYPE_INT, wavparse->width, "depth", G_TYPE_INT, wavparse->width, "rate", G_TYPE_INT, wavparse->rate, "channels", G_TYPE_INT, wavparse->channels, NULL); break; case GST_RIFF_WAVE_FORMAT_MPEGL12: case GST_RIFF_WAVE_FORMAT_MPEGL3:{ int layer = (wavparse->format == GST_RIFF_WAVE_FORMAT_MPEGL12) ? 2 : 3; caps = gst_caps_new_simple ("audio/mpeg", "mpegversion", G_TYPE_INT, 1, "layer", G_TYPE_INT, layer, "rate", G_TYPE_INT, wavparse->rate, "channels", G_TYPE_INT, wavparse->channels, NULL); } break; default: GST_ELEMENT_ERROR (wavparse, STREAM, NOT_IMPLEMENTED, (NULL), ("format %d not handled", wavparse->format)); return; } if (caps) { gst_pad_set_explicit_caps (wavparse->srcpad, caps); gst_caps_free (caps); } GST_DEBUG ("frequency %d, channels %d", wavparse->rate, wavparse->channels); } } static gboolean gst_wavparse_handle_sink_event (GstWavParse * wavparse) { guint32 remaining; GstEvent *event; GstEventType type; gboolean res = TRUE; gst_bytestream_get_status (wavparse->bs, &remaining, &event); type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN; GST_DEBUG ("wavparse: event %p %d", event, type); switch (type) { case GST_EVENT_EOS: gst_bytestream_flush (wavparse->bs, remaining); gst_pad_event_default (wavparse->sinkpad, event); res = FALSE; goto done; case GST_EVENT_FLUSH: g_warning ("Wavparse: Flush event"); break; default: g_warning ("Wavparse: Unhandled event %d", type); break; } gst_event_unref (event); done: return res; } static void gst_wavparse_loop (GstElement * element) { GstWavParse *wavparse; gst_riff_riff chunk; guint32 flush = 0; guint32 got_bytes; GstByteStream *bs; wavparse = GST_WAVPARSE (element); bs = wavparse->bs; if (wavparse->seek_pending) { GST_DEBUG ("wavparse: seek pending to %" G_GINT64_FORMAT " %08llx", wavparse->seek_offset, (unsigned long long) wavparse->seek_offset); if (!gst_bytestream_seek (bs, wavparse->seek_offset, GST_SEEK_METHOD_SET)) { GST_INFO ("wavparse: Could not seek"); } wavparse->seek_pending = FALSE; } if (wavparse->state == GST_WAVPARSE_DATA) { GstBuffer *buf; int desired; /* This seems to want the whole chunk, Will this screw up streaming? Does anyone care about streaming wavs? FIXME: Should we have a decent buffer size? */ #define MAX_BUFFER_SIZE 1024 if (wavparse->dataleft > 0) { desired = MIN (wavparse->dataleft, MAX_BUFFER_SIZE); got_bytes = gst_bytestream_peek (bs, &buf, desired); if (got_bytes != desired) { /* EOS? */ GstEvent *event; guint32 remaining; gst_bytestream_get_status (bs, &remaining, &event); if (event && GST_EVENT_TYPE (event) == GST_EVENT_EOS) { gst_pad_event_default (wavparse->sinkpad, event); } else { GST_ELEMENT_ERROR (element, RESOURCE, READ, (NULL), (NULL)); } return; } wavparse->dataleft -= got_bytes; wavparse->byteoffset += got_bytes; gst_bytestream_flush (bs, got_bytes); gst_pad_push (wavparse->srcpad, GST_DATA (buf)); return; } else { wavparse->state = GST_WAVPARSE_OTHER; } } do { gst_riff_riff *temp_chunk; guint8 *tempdata; guint32 skipsize; /* read first two dwords to get chunktype and size */ while (TRUE) { got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, sizeof (gst_riff_chunk)); temp_chunk = (gst_riff_riff *) tempdata; if (got_bytes < sizeof (gst_riff_chunk)) { if (!gst_wavparse_handle_sink_event (wavparse)) { return; } } else { break; } } chunk.id = GUINT32_FROM_LE (temp_chunk->id); chunk.size = GUINT32_FROM_LE (temp_chunk->size); switch (chunk.id) { case GST_RIFF_TAG_RIFF: case GST_RIFF_TAG_LIST: /* Read complete list chunk */ while (TRUE) { got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, sizeof (gst_riff_list)); temp_chunk = (gst_riff_riff *) tempdata; if (got_bytes < sizeof (gst_riff_list)) { if (!gst_wavparse_handle_sink_event (wavparse)) { return; } } else { break; } } chunk.type = GUINT32_FROM_LE (temp_chunk->type); skipsize = sizeof (gst_riff_list); break; case GST_RIFF_TAG_cue: skipsize = 0; break; default: skipsize = sizeof (gst_riff_chunk); break; } gst_bytestream_flush (bs, skipsize); } while (FALSE); /* need to flush an even number of bytes at the end */ flush = (chunk.size + 1) & ~1; switch (wavparse->state) { case GST_WAVPARSE_START: if (chunk.id != GST_RIFF_TAG_RIFF && chunk.type != GST_RIFF_RIFF_WAVE) { GST_ELEMENT_ERROR (element, STREAM, WRONG_TYPE, (NULL), ("chunk.id %08x chunk.type %08x", chunk.id, chunk.type)); return; } wavparse->state = GST_WAVPARSE_OTHER; /* We are not going to flush lists */ flush = 0; break; case GST_WAVPARSE_OTHER: GST_DEBUG ("riff tag: %4.4s %08x", (char *) &chunk.id, chunk.size); switch (chunk.id) { case GST_RIFF_TAG_data: wavparse->state = GST_WAVPARSE_DATA; wavparse->dataleft = chunk.size; wavparse->byteoffset = 0; flush = 0; break; case GST_RIFF_TAG_fmt: gst_wavparse_parse_fmt (wavparse, chunk.size); flush = 0; break; case GST_RIFF_TAG_cue: //gst_wavparse_parse_cues (wavparse, chunk.size); break; case GST_RIFF_TAG_LIST: GST_DEBUG ("list type: %4.4s", (char *) &chunk.type); switch (chunk.type) { case GST_RIFF_LIST_INFO: //gst_wavparse_parse_info (wavparse, chunk.size - 4); //flush = 0; break; case GST_RIFF_LIST_adtl: //gst_wavparse_parse_adtl (wavparse, chunk.size - 4); //flush = 0; break; default: //flush = 0; break; } default: GST_DEBUG (" ***** unknown chunkid %08x", chunk.id); //flush = 0; break; } break; case GST_WAVPARSE_DATA: /* Should have been handled up there ^^^^ */ flush = 0; break; default: /* Unknown */ g_warning ("Unknown state %d\n", wavparse->state); //GST_DEBUG (" ***** unknown chunkid %08x", chunk.id); break; } if (flush > 0) { gboolean res; res = gst_bytestream_flush (bs, flush); if (!res) { guint32 remaining; GstEvent *event; gst_bytestream_get_status (bs, &remaining, &event); gst_event_unref (event); } } } /* convert and query stuff */ static const GstFormat * gst_wavparse_get_formats (GstPad * pad) { static GstFormat formats[] = { GST_FORMAT_TIME, GST_FORMAT_BYTES, GST_FORMAT_DEFAULT, /* a "frame", ie a set of samples per Hz */ 0 }; return formats; } static gboolean gst_wavparse_pad_convert (GstPad * pad, GstFormat src_format, gint64 src_value, GstFormat * dest_format, gint64 * dest_value) { gint bytes_per_sample; glong byterate; GstWavParse *wavparse; const GstFormat *formats; gboolean src_format_ok = FALSE; gboolean dest_format_ok = FALSE; wavparse = GST_WAVPARSE (gst_pad_get_parent (pad)); bytes_per_sample = wavparse->channels * wavparse->width / 8; if (bytes_per_sample == 0) { GST_DEBUG ("bytes_per_sample 0, probably an mp3 - channels %d, width %d", wavparse->channels, wavparse->width); return FALSE; } byterate = (glong) (bytes_per_sample * wavparse->rate); if (byterate == 0) { g_warning ("byterate is 0, internal error\n"); return FALSE; } GST_DEBUG ("bytes per sample: %d", bytes_per_sample); /* check if both src_format and sink_format are in the supported formats */ formats = gst_pad_get_formats (pad); while (formats && *formats) { if (src_format == *formats) { src_format_ok = TRUE; } if (*dest_format == *formats) { dest_format_ok = TRUE; } formats++; } if (!src_format_ok || !dest_format_ok) { GST_DEBUG ("src or dest format not supported"); return FALSE; } switch (src_format) { case GST_FORMAT_BYTES: if (*dest_format == GST_FORMAT_DEFAULT) *dest_value = src_value / bytes_per_sample; else if (*dest_format == GST_FORMAT_TIME) *dest_value = src_value * GST_SECOND / byterate; else { GST_DEBUG ("can't convert from bytes to other than units/time"); return FALSE; } break; case GST_FORMAT_DEFAULT: if (*dest_format == GST_FORMAT_BYTES) *dest_value = src_value * bytes_per_sample; else if (*dest_format == GST_FORMAT_TIME) *dest_value = src_value * GST_SECOND / wavparse->rate; else { GST_DEBUG ("can't convert from units to other than bytes/time"); return FALSE; } break; case GST_FORMAT_TIME: if (*dest_format == GST_FORMAT_BYTES) *dest_value = src_value * byterate / GST_SECOND; else if (*dest_format == GST_FORMAT_DEFAULT) *dest_value = src_value * wavparse->rate / GST_SECOND; else { GST_DEBUG ("can't convert from time to other than bytes/units"); return FALSE; } *dest_value = *dest_value & ~(bytes_per_sample - 1); break; default: g_warning ("unhandled format for wavparse\n"); return FALSE; } return TRUE; } static const GstQueryType * gst_wavparse_get_query_types (GstPad * pad) { static const GstQueryType types[] = { GST_QUERY_TOTAL, GST_QUERY_POSITION, 0 }; return types; } /* handle queries for location and length in requested format */ static gboolean gst_wavparse_pad_query (GstPad * pad, GstQueryType type, GstFormat * format, gint64 * value) { GstFormat peer_format = GST_FORMAT_BYTES; gint64 peer_value; GstWavParse *wavparse; /* probe sink's peer pad, convert value, and that's it :) */ /* FIXME: ideally we'd loop over possible formats of peer instead * of only using BYTE */ /* only support byte, time and unit queries */ wavparse = GST_WAVPARSE (gst_pad_get_parent (pad)); if (!gst_pad_query (GST_PAD_PEER (wavparse->sinkpad), type, &peer_format, &peer_value)) { GST_DEBUG ("Could not query sink pad's peer"); return FALSE; } if (!gst_pad_convert (wavparse->sinkpad, peer_format, peer_value, format, value)) { GST_DEBUG ("Could not convert sink pad's peer"); return FALSE; } GST_DEBUG ("pad_query done, value %" G_GINT64_FORMAT "\n", *value); return TRUE; } static const GstEventMask * gst_wavparse_get_event_masks (GstPad * pad) { static const GstEventMask gst_wavparse_src_event_masks[] = { {GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH}, {0,} }; return gst_wavparse_src_event_masks; } static gboolean gst_wavparse_srcpad_event (GstPad * pad, GstEvent * event) { #if 0 GstWavParse *wavparse = GST_WAVPARSE (GST_PAD_PARENT (pad)); gboolean res = FALSE; GST_DEBUG ("event %d", GST_EVENT_TYPE (event)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_SEEK: { gint64 byteoffset; GstFormat format; /* we can only seek when in the DATA state */ if (wavparse->state != GST_WAVPARSE_DATA) { return FALSE; } format = GST_FORMAT_BYTES; /* bring format to bytes for the peer element, * FIXME be smarter here */ res = gst_pad_convert (pad, GST_EVENT_SEEK_FORMAT (event), GST_EVENT_SEEK_OFFSET (event), &format, &byteoffset); if (res) { /* ok, seek worked, update our state */ wavparse->seek_offset = byteoffset; wavparse->seek_pending = TRUE; wavparse->need_discont = TRUE; } break; } default: break; } gst_event_unref (event); return res; #else return FALSE; #endif } static GstElementStateReturn gst_wavparse_change_state (GstElement * element) { GstWavParse *wavparse = GST_WAVPARSE (element); switch (GST_STATE_TRANSITION (element)) { case GST_STATE_NULL_TO_READY: break; case GST_STATE_READY_TO_PAUSED: wavparse->bs = gst_bytestream_new (wavparse->sinkpad); wavparse->state = GST_WAVPARSE_START; break; case GST_STATE_PAUSED_TO_PLAYING: break; case GST_STATE_PLAYING_TO_PAUSED: break; case GST_STATE_PAUSED_TO_READY: gst_bytestream_destroy (wavparse->bs); wavparse->state = GST_WAVPARSE_UNKNOWN; wavparse->bps = 0; wavparse->seek_pending = FALSE; wavparse->seek_offset = 0; break; case GST_STATE_READY_TO_NULL: break; } if (GST_ELEMENT_CLASS (parent_class)->change_state) return GST_ELEMENT_CLASS (parent_class)->change_state (element); return GST_STATE_SUCCESS; } static gboolean plugin_init (GstPlugin * plugin) { if (!gst_library_load ("gstbytestream")) { return FALSE; } return gst_element_register (plugin, "wavparse", GST_RANK_SECONDARY, GST_TYPE_WAVPARSE); } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "wavparse", "Parse a .wav file into raw audio", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)