/* -*- 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 "gstwavparse.h" #include "gst/riff/riff-ids.h" #include "gst/riff/riff-media.h" #ifndef G_MAXUINT32 #define G_MAXUINT32 0xffffffff #endif GST_DEBUG_CATEGORY (wavparse_debug); #define GST_CAT_DEFAULT (wavparse_debug) 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); 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_SOMETIMES, /* FIXME: spider */ 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 ];" "audio/x-adpcm, " "layout = (string) microsoft, " "block_align = (int) [ 1, 8192 ], " "rate = (int) [ 8000, 48000 ], " "channels = (int) [ 1, 2 ]; " "audio/x-adpcm, " "layout = (string) dvi, " "block_align = (int) [ 1, 8192 ], " "rate = (int) [ 8000, 48000 ], " "channels = (int) [ 1, 2 ];" "audio/x-vnd.sony.atrac3") ); /* 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_RIFF_READ, "GstWavParse", &wavparse_info, 0); } return wavparse_type; } static void gst_wavparse_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); static GstElementDetails gst_wavparse_details = GST_ELEMENT_DETAILS (".wav demuxer", "Codec/Demuxer/Audio", "Parse a .wav file into raw audio", "Erik Walthinsen "); 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_RIFF_READ); object_class->get_property = gst_wavparse_get_property; gstelement_class->change_state = gst_wavparse_change_state; GST_DEBUG_CATEGORY_INIT (wavparse_debug, "wavparse", 0, "WAV parser"); } 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_RIFF_READ (wavparse)->sinkpad = 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); #if 0 /* 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); #endif gst_element_set_loop_function (GST_ELEMENT (wavparse), gst_wavparse_loop); wavparse->state = GST_WAVPARSE_START; /* These will all be set correctly in the fmt chunk */ wavparse->depth = 0; wavparse->rate = 0; wavparse->width = 0; wavparse->channels = 0; wavparse->seek_pending = FALSE; wavparse->seek_offset = 0; } static void gst_wavparse_destroy_sourcepad (GstWavParse * wavparse) { if (wavparse->srcpad) { gst_element_remove_pad (GST_ELEMENT (wavparse), wavparse->srcpad); wavparse->srcpad = NULL; } } static void gst_wavparse_create_sourcepad (GstWavParse * wavparse) { gst_wavparse_destroy_sourcepad (wavparse); /* 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_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); } 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_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 gboolean gst_wavparse_stream_init (GstWavParse * wav) { GstRiffRead *riff = GST_RIFF_READ (wav); guint32 doctype; if (!gst_riff_read_header (riff, &doctype)) { GST_WARNING_OBJECT (wav, "could not read header"); return FALSE; } if (doctype != GST_RIFF_RIFF_WAVE) { GST_ELEMENT_ERROR (wav, STREAM, WRONG_TYPE, (NULL), (NULL)); return FALSE; } return TRUE; } /* Read 'fmt ' header */ static gboolean gst_wavparse_fmt (GstWavParse * wav) { GstRiffRead *riff = GST_RIFF_READ (wav); gst_riff_strf_auds *header = NULL; GstCaps *caps; if (!gst_riff_read_strf_auds (riff, &header)) { g_warning ("Not fmt"); return FALSE; } /* Note: gst_riff_create_audio_caps might nedd to fix values in * the header header depending on the format, so call it first */ caps = gst_riff_create_audio_caps (header->format, NULL, header, NULL); wav->format = header->format; wav->rate = header->rate; wav->channels = header->channels; wav->blockalign = header->blockalign; wav->width = (header->blockalign * 8) / header->channels; wav->depth = header->size; wav->bps = header->av_bps; g_free (header); if (caps) { gst_wavparse_create_sourcepad (wav); gst_pad_set_explicit_caps (wav->srcpad, caps); gst_caps_free (caps); gst_element_add_pad (GST_ELEMENT (wav), wav->srcpad); gst_element_no_more_pads (GST_ELEMENT (wav)); GST_DEBUG ("frequency %d, channels %d", wav->rate, wav->channels); } else { GST_ELEMENT_ERROR (wav, STREAM, TYPE_NOT_FOUND, (NULL), (NULL)); return FALSE; } return TRUE; } static gboolean gst_wavparse_other (GstWavParse * wav) { GstRiffRead *riff = GST_RIFF_READ (wav); guint32 tag, length; if (!gst_riff_peek_head (riff, &tag, &length, NULL)) { GST_WARNING_OBJECT (wav, "could not peek head"); return FALSE; } GST_DEBUG_OBJECT (wav, "got tag (%08x) %4.4s, length %d", tag, (gchar *) & tag, length); switch (tag) { case GST_RIFF_TAG_LIST: if (!(tag = gst_riff_peek_list (riff))) { GST_WARNING_OBJECT (wav, "could not peek list"); return FALSE; } switch (tag) { case GST_RIFF_LIST_INFO: if (!gst_riff_read_list (riff, &tag) || !gst_riff_read_info (riff)) { GST_WARNING_OBJECT (wav, "could not read list"); return FALSE; } break; case GST_RIFF_LIST_adtl: if (!gst_riff_read_skip (riff)) { GST_WARNING_OBJECT (wav, "could not read skip"); return FALSE; } break; default: GST_DEBUG_OBJECT (wav, "skipping tag (%08x) %4.4s", tag, (gchar *) & tag); if (!gst_riff_read_skip (riff)) { GST_WARNING_OBJECT (wav, "could not read skip"); return FALSE; } break; } break; case GST_RIFF_TAG_data: if (!gst_bytestream_flush (riff->bs, 8)) { GST_WARNING_OBJECT (wav, "could not flush 8 bytes"); return FALSE; } GST_DEBUG_OBJECT (wav, "switching to data mode"); wav->state = GST_WAVPARSE_DATA; wav->datastart = gst_bytestream_tell (riff->bs); if (length == 0) { guint64 file_length; /* length is 0, data probably stretches to the end * of file */ GST_DEBUG_OBJECT (wav, "length is 0 trying to find length"); /* get length of file */ file_length = gst_bytestream_length (riff->bs); if (file_length == -1) { GST_DEBUG_OBJECT (wav, "could not get file length, assuming data to eof"); /* could not get length, assuming till eof */ length = G_MAXUINT32; } if (file_length > G_MAXUINT32) { GST_DEBUG_OBJECT (wav, "file length %lld, clipping to 32 bits"); /* could not get length, assuming till eof */ length = G_MAXUINT32; } else { GST_DEBUG_OBJECT (wav, "file length %lld, datalength", file_length, length); /* substract offset of datastart from length */ length = file_length - wav->datastart; GST_DEBUG_OBJECT (wav, "datalength %lld", length); } } wav->dataleft = wav->datasize = (guint64) length; break; case GST_RIFF_TAG_cue: if (!gst_riff_read_skip (riff)) { GST_WARNING_OBJECT (wav, "could not read skip"); return FALSE; } break; default: GST_DEBUG_OBJECT (wav, "skipping tag (%08x) %4.4s", tag, (gchar *) & tag); if (!gst_riff_read_skip (riff)) return FALSE; break; } return TRUE; } static gboolean gst_wavparse_handle_seek (GstWavParse * wav) { GstRiffRead *riff = GST_RIFF_READ (wav); GstEvent *event = NULL; guint32 remaining; guint8 *data; if (!gst_bytestream_seek (riff->bs, wav->seek_offset + wav->datastart, GST_SEEK_METHOD_SET)) return FALSE; /* wait for discont */ while (!event) { if (gst_bytestream_peek_bytes (riff->bs, &data, 1)) { GST_WARNING ("Unexpected data after seek - this means seek failed"); return FALSE; } /* get the discont event and return */ gst_bytestream_get_status (riff->bs, &remaining, &event); if (!event) { GST_WARNING ("No discontinuity event after seek - seek failed"); return FALSE; } else if (GST_EVENT_TYPE (event) != GST_EVENT_DISCONTINUOUS) { GstEventType type = GST_EVENT_TYPE (event); gst_pad_event_default (riff->sinkpad, event); if (type == GST_EVENT_EOS) return FALSE; event = NULL; } } wav->dataleft = wav->datasize - wav->seek_offset; gst_event_unref (event); event = gst_event_new_discontinuous (FALSE, GST_FORMAT_BYTES, wav->seek_offset, GST_FORMAT_TIME, GST_SECOND * wav->seek_offset / wav->bps, GST_FORMAT_UNDEFINED); gst_pad_event_default (wav->sinkpad, event); return TRUE; } #define MAX_BUFFER_SIZE 4096 static void gst_wavparse_loop (GstElement * element) { GstWavParse *wav = GST_WAVPARSE (element); GstRiffRead *riff = GST_RIFF_READ (wav); if (wav->state == GST_WAVPARSE_DATA) { /* seek handling */ if (wav->seek_pending) { gst_wavparse_handle_seek (wav); wav->seek_pending = FALSE; } if (wav->dataleft > 0) { guint32 got_bytes, desired; GstBuffer *buf = NULL; desired = MIN (wav->dataleft, MAX_BUFFER_SIZE); if (!(buf = gst_riff_read_element_data (riff, desired, &got_bytes))) { GST_WARNING_OBJECT (wav, "trying to read %d bytes failed", desired); return; } GST_DEBUG_OBJECT (wav, "read %d bytes, got %d bytes", desired, got_bytes); GST_BUFFER_TIMESTAMP (buf) = GST_SECOND * (wav->datasize - wav->dataleft) / wav->bps; GST_BUFFER_DURATION (buf) = GST_SECOND * got_bytes / wav->bps; gst_pad_push (wav->srcpad, GST_DATA (buf)); wav->byteoffset += got_bytes; if (got_bytes < wav->dataleft) { wav->dataleft -= got_bytes; return; } else { wav->dataleft = 0; wav->state = GST_WAVPARSE_OTHER; } } else { wav->state = GST_WAVPARSE_OTHER; } } switch (wav->state) { case GST_WAVPARSE_START: if (!gst_wavparse_stream_init (wav)) { return; } wav->state = GST_WAVPARSE_FMT; /* fall-through */ case GST_WAVPARSE_FMT: if (!gst_wavparse_fmt (wav)) { return; } wav->state = GST_WAVPARSE_OTHER; /* fall-through */ case GST_WAVPARSE_OTHER: if (!gst_wavparse_other (wav)) { return; } break; case GST_WAVPARSE_DATA: default: g_assert_not_reached (); } } /* 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) { guint bytes_per_sample, byterate; GstWavParse *wavparse; 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 = wavparse->bps; if (byterate == 0) { g_warning ("byterate is 0, internal error\n"); return FALSE; } GST_DEBUG ("bytes per sample: %d", bytes_per_sample); switch (src_format) { case GST_FORMAT_BYTES: switch (*dest_format) { case GST_FORMAT_DEFAULT: *dest_value = src_value / bytes_per_sample; break; case GST_FORMAT_TIME: *dest_value = src_value * GST_SECOND / byterate; break; default: return FALSE; } *dest_value -= *dest_value % bytes_per_sample; break; case GST_FORMAT_DEFAULT: switch (*dest_format) { case GST_FORMAT_BYTES: *dest_value = src_value * bytes_per_sample; break; case GST_FORMAT_TIME: *dest_value = src_value * GST_SECOND / wavparse->rate; break; default: return FALSE; } break; case GST_FORMAT_TIME: switch (*dest_format) { case GST_FORMAT_BYTES: /* make sure we end up on a sample boundary */ *dest_value = (src_value * wavparse->rate / GST_SECOND) * wavparse->blockalign; break; case GST_FORMAT_DEFAULT: *dest_value = src_value * wavparse->rate / GST_SECOND; break; default: return FALSE; } break; default: 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) { gint64 bytevalue; GstWavParse *wav = GST_WAVPARSE (gst_pad_get_parent (pad)); /* only if we know */ if (wav->state != GST_WAVPARSE_DATA) return FALSE; switch (type) { case GST_QUERY_POSITION: bytevalue = wav->datasize - wav->dataleft; break; case GST_QUERY_TOTAL: bytevalue = wav->datasize; break; default: return FALSE; } if (*format == GST_FORMAT_BYTES) { *value = bytevalue; return TRUE; } return gst_pad_convert (wav->sinkpad, GST_FORMAT_BYTES, bytevalue, format, value); } 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) { 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; /* bring format to samples for the peer element, */ format = GST_FORMAT_BYTES; 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; } break; } default: break; } gst_event_unref (event); return res; } static GstElementStateReturn gst_wavparse_change_state (GstElement * element) { GstWavParse *wav = GST_WAVPARSE (element); switch (GST_STATE_TRANSITION (element)) { case GST_STATE_NULL_TO_READY: break; case GST_STATE_READY_TO_PAUSED: wav->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_wavparse_destroy_sourcepad (wav); wav->state = GST_WAVPARSE_START; wav->width = 0; wav->depth = 0; wav->rate = 0; wav->channels = 0; wav->seek_pending = FALSE; wav->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 ("riff")) { return FALSE; } return gst_element_register (plugin, "wavparse", GST_RANK_PRIMARY, 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)