/* GStreamer * Copyright (C) <1999> Erik Walthinsen * (C) <2006> Wim Taymans * * 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-siddec * * This element decodes .sid files to raw audio. .sid files are in fact * small Commodore 64 programs that are executed on an emulated 6502 CPU and a * MOS 6581 sound chip. * * This plugin will first load the complete program into memory before starting * the emulator and producing output. * * Seeking is not (and cannot be) implemented. * * * Example pipelines * |[ * gst-launch -v filesrc location=Hawkeye.sid ! siddec ! audioconvert ! alsasink * ]| Decode a sid file and play back the audio using alsasink. * * * Last reviewed on 2006-12-30 (0.10.5) */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include "gstsiddec.h" #define DEFAULT_TUNE 0 #define DEFAULT_CLOCK SIDTUNE_CLOCK_PAL #define DEFAULT_MEMORY MPU_BANK_SWITCHING #define DEFAULT_FILTER TRUE #define DEFAULT_MEASURED_VOLUME TRUE #define DEFAULT_MOS8580 FALSE #define DEFAULT_FORCE_SPEED FALSE #define DEFAULT_BLOCKSIZE 4096 enum { PROP_0, PROP_TUNE, PROP_CLOCK, PROP_MEMORY, PROP_FILTER, PROP_MEASURED_VOLUME, PROP_MOS8580, PROP_FORCE_SPEED, PROP_BLOCKSIZE, PROP_METADATA }; static GstStaticPadTemplate sink_templ = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-sid") ); #define FORMATS "{ "GST_AUDIO_NE(S16)","GST_AUDIO_NE(U16)", S8, U8 }" static GstStaticPadTemplate src_templ = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-raw, " "format = (string) " FORMATS ", " "layout = (string) interleaved, " "rate = (int) [ 8000, 48000 ], " "channels = (int) [ 1, 2 ]") ); GST_DEBUG_CATEGORY_STATIC (gst_siddec_debug); #define GST_CAT_DEFAULT gst_siddec_debug #define GST_TYPE_SID_CLOCK (gst_sid_clock_get_type()) static GType gst_sid_clock_get_type (void) { static GType sid_clock_type = 0; static const GEnumValue sid_clock[] = { {SIDTUNE_CLOCK_PAL, "PAL", "pal"}, {SIDTUNE_CLOCK_NTSC, "NTSC", "ntsc"}, {0, NULL, NULL}, }; if (!sid_clock_type) { sid_clock_type = g_enum_register_static ("GstSidClock", sid_clock); } return sid_clock_type; } #define GST_TYPE_SID_MEMORY (gst_sid_memory_get_type()) static GType gst_sid_memory_get_type (void) { static GType sid_memory_type = 0; static const GEnumValue sid_memory[] = { {MPU_BANK_SWITCHING, "Bank Switching", "bank-switching"}, {MPU_TRANSPARENT_ROM, "Transparent ROM", "transparent-rom"}, {MPU_PLAYSID_ENVIRONMENT, "Playsid Environment", "playsid-environment"}, {0, NULL, NULL}, }; if (!sid_memory_type) { sid_memory_type = g_enum_register_static ("GstSidMemory", sid_memory); } return sid_memory_type; } static void gst_siddec_finalize (GObject * object); static GstFlowReturn gst_siddec_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer); static gboolean gst_siddec_sink_event (GstPad * pad, GstObject * parent, GstEvent * event); static gboolean gst_siddec_src_convert (GstPad * pad, GstFormat src_format, gint64 src_value, GstFormat * dest_format, gint64 * dest_value); static gboolean gst_siddec_src_event (GstPad * pad, GstObject * parent, GstEvent * event); static gboolean gst_siddec_src_query (GstPad * pad, GstObject * parent, GstQuery * query); static void gst_siddec_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_siddec_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); #define gst_siddec_parent_class parent_class G_DEFINE_TYPE (GstSidDec, gst_siddec, GST_TYPE_ELEMENT); static void gst_siddec_class_init (GstSidDecClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gobject_class->finalize = gst_siddec_finalize; gobject_class->set_property = gst_siddec_set_property; gobject_class->get_property = gst_siddec_get_property; g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TUNE, g_param_spec_int ("tune", "tune", "tune", 0, 100, DEFAULT_TUNE, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_CLOCK, g_param_spec_enum ("clock", "clock", "clock", GST_TYPE_SID_CLOCK, DEFAULT_CLOCK, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MEMORY, g_param_spec_enum ("memory", "memory", "memory", GST_TYPE_SID_MEMORY, DEFAULT_MEMORY, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FILTER, g_param_spec_boolean ("filter", "filter", "filter", DEFAULT_FILTER, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MEASURED_VOLUME, g_param_spec_boolean ("measured-volume", "measured_volume", "measured_volume", DEFAULT_MEASURED_VOLUME, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MOS8580, g_param_spec_boolean ("mos8580", "mos8580", "mos8580", DEFAULT_MOS8580, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FORCE_SPEED, g_param_spec_boolean ("force-speed", "force_speed", "force_speed", DEFAULT_FORCE_SPEED, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BLOCKSIZE, g_param_spec_uint ("blocksize", "Block size", "Size in bytes to output per buffer", 1, G_MAXUINT, DEFAULT_BLOCKSIZE, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); g_object_class_install_property (gobject_class, PROP_METADATA, g_param_spec_boxed ("metadata", "Metadata", "Metadata", GST_TYPE_CAPS, (GParamFlags) (G_PARAM_READABLE | G_PARAM_STATIC_STRINGS))); gst_element_class_set_static_metadata (gstelement_class, "Sid decoder", "Codec/Decoder/Audio", "Use libsidplay to decode SID audio tunes", "Wim Taymans "); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&src_templ)); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&sink_templ)); } static void gst_siddec_init (GstSidDec * siddec) { siddec->sinkpad = gst_pad_new_from_static_template (&sink_templ, "sink"); gst_pad_set_event_function (siddec->sinkpad, gst_siddec_sink_event); gst_pad_set_chain_function (siddec->sinkpad, gst_siddec_chain); gst_element_add_pad (GST_ELEMENT (siddec), siddec->sinkpad); siddec->srcpad = gst_pad_new_from_static_template (&src_templ, "src"); gst_pad_set_event_function (siddec->srcpad, gst_siddec_src_event); gst_pad_set_query_function (siddec->srcpad, gst_siddec_src_query); gst_pad_use_fixed_caps (siddec->srcpad); gst_element_add_pad (GST_ELEMENT (siddec), siddec->srcpad); siddec->engine = new emuEngine (); siddec->tune = new sidTune (0); siddec->config = (emuConfig *) g_malloc (sizeof (emuConfig)); /* get default config parameters */ siddec->engine->getConfig (*siddec->config); siddec->config->mos8580 = DEFAULT_MOS8580; // mos8580 siddec->config->memoryMode = DEFAULT_MEMORY; // memory mode siddec->config->clockSpeed = DEFAULT_CLOCK; // clock speed siddec->config->forceSongSpeed = DEFAULT_FORCE_SPEED; // force song speed siddec->engine->setConfig (*siddec->config); siddec->tune_buffer = (guchar *) g_malloc (maxSidtuneFileLen); siddec->tune_len = 0; siddec->tune_number = 0; siddec->total_bytes = 0; siddec->blocksize = DEFAULT_BLOCKSIZE; } static void gst_siddec_finalize (GObject * object) { GstSidDec *siddec = GST_SIDDEC (object); g_free (siddec->config); g_free (siddec->tune_buffer); delete (siddec->tune); delete (siddec->engine); G_OBJECT_CLASS (parent_class)->finalize (object); } static void update_tags (GstSidDec * siddec) { sidTuneInfo info; GstTagList *list; if (siddec->tune->getInfo (info)) { list = gst_tag_list_new_empty (); if (info.nameString) { gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_TITLE, info.nameString, (void *) NULL); } if (info.authorString) { gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_ARTIST, info.authorString, (void *) NULL); } if (info.copyrightString) { gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_COPYRIGHT, info.copyrightString, (void *) NULL); } gst_pad_push_event (siddec->srcpad, gst_event_new_tag (list)); } } static gboolean siddec_negotiate (GstSidDec * siddec) { GstCaps *allowed; GstStructure *structure; int rate = 44100; int channels = 1; GstCaps *caps; const gchar *str; GstAudioFormat format; gchar *stream_id; allowed = gst_pad_get_allowed_caps (siddec->srcpad); if (!allowed) goto nothing_allowed; GST_DEBUG_OBJECT (siddec, "allowed caps: %" GST_PTR_FORMAT, allowed); allowed = gst_caps_normalize (allowed); structure = gst_caps_get_structure (allowed, 0); str = gst_structure_get_string (structure, "format"); if (str == NULL) goto invalid_format; format = gst_audio_format_from_string (str); switch (format) { case GST_AUDIO_FORMAT_S8: siddec->config->bitsPerSample = 8; siddec->config->sampleFormat = SIDEMU_SIGNED_PCM; break; case GST_AUDIO_FORMAT_U8: siddec->config->bitsPerSample = 8; siddec->config->sampleFormat = SIDEMU_UNSIGNED_PCM; break; case GST_AUDIO_FORMAT_S16: siddec->config->bitsPerSample = 16; siddec->config->sampleFormat = SIDEMU_SIGNED_PCM; break; case GST_AUDIO_FORMAT_U16: siddec->config->bitsPerSample = 16; siddec->config->sampleFormat = SIDEMU_UNSIGNED_PCM; break; default: goto invalid_format; } gst_structure_get_int (structure, "rate", &rate); siddec->config->frequency = rate; gst_structure_get_int (structure, "channels", &channels); siddec->config->channels = channels; stream_id = gst_pad_create_stream_id (siddec->srcpad, GST_ELEMENT_CAST (siddec), NULL); gst_pad_push_event (siddec->srcpad, gst_event_new_stream_start (stream_id)); g_free (stream_id); caps = gst_caps_new_simple ("audio/x-raw", "format", G_TYPE_STRING, gst_audio_format_to_string (format), "layout", G_TYPE_STRING, "interleaved", "rate", G_TYPE_INT, siddec->config->frequency, "channels", G_TYPE_INT, siddec->config->channels, NULL); gst_pad_set_caps (siddec->srcpad, caps); gst_caps_unref (caps); gst_caps_unref (allowed); siddec->engine->setConfig (*siddec->config); return TRUE; /* ERRORS */ nothing_allowed: { GST_DEBUG_OBJECT (siddec, "could not get allowed caps"); return FALSE; } invalid_format: { GST_DEBUG_OBJECT (siddec, "invalid audio caps"); gst_caps_unref (allowed); return FALSE; } } static void play_loop (GstPad * pad) { GstFlowReturn ret; GstSidDec *siddec; GstBuffer *out; GstMapInfo outmap; gint64 value, offset, time; GstFormat format; siddec = GST_SIDDEC (gst_pad_get_parent (pad)); out = gst_buffer_new_and_alloc (siddec->blocksize); gst_buffer_map (out, &outmap, GST_MAP_WRITE); sidEmuFillBuffer (*siddec->engine, *siddec->tune, outmap.data, siddec->blocksize); gst_buffer_unmap (out, &outmap); /* get offset in samples */ format = GST_FORMAT_DEFAULT; gst_siddec_src_convert (siddec->srcpad, GST_FORMAT_BYTES, siddec->total_bytes, &format, &offset); GST_BUFFER_OFFSET (out) = offset; /* get current timestamp */ format = GST_FORMAT_TIME; gst_siddec_src_convert (siddec->srcpad, GST_FORMAT_BYTES, siddec->total_bytes, &format, &time); GST_BUFFER_TIMESTAMP (out) = time; /* update position and get new timestamp to calculate duration */ siddec->total_bytes += siddec->blocksize; /* get offset in samples */ format = GST_FORMAT_DEFAULT; gst_siddec_src_convert (siddec->srcpad, GST_FORMAT_BYTES, siddec->total_bytes, &format, &value); GST_BUFFER_OFFSET_END (out) = value; format = GST_FORMAT_TIME; gst_siddec_src_convert (siddec->srcpad, GST_FORMAT_BYTES, siddec->total_bytes, &format, &value); GST_BUFFER_DURATION (out) = value - time; if ((ret = gst_pad_push (siddec->srcpad, out)) != GST_FLOW_OK) goto pause; done: gst_object_unref (siddec); return; /* ERRORS */ pause: { const gchar *reason = gst_flow_get_name (ret); if (ret == GST_FLOW_EOS) { /* perform EOS logic, FIXME, segment seek? */ gst_pad_push_event (pad, gst_event_new_eos ()); } else if (ret < GST_FLOW_EOS || ret == GST_FLOW_NOT_LINKED) { /* for fatal errors we post an error message */ GST_ELEMENT_ERROR (siddec, STREAM, FAILED, (NULL), ("streaming task paused, reason %s", reason)); gst_pad_push_event (pad, gst_event_new_eos ()); } GST_INFO_OBJECT (siddec, "pausing task, reason: %s", reason); gst_pad_pause_task (pad); goto done; } } static gboolean start_play_tune (GstSidDec * siddec) { gboolean res; GstSegment segment; if (!siddec->tune->load (siddec->tune_buffer, siddec->tune_len)) goto could_not_load; update_tags (siddec); if (!siddec_negotiate (siddec)) goto could_not_negotiate; if (!sidEmuInitializeSong (*siddec->engine, *siddec->tune, siddec->tune_number)) goto could_not_init; gst_segment_init (&segment, GST_FORMAT_TIME); gst_pad_push_event (siddec->srcpad, gst_event_new_segment (&segment)); res = gst_pad_start_task (siddec->srcpad, (GstTaskFunction) play_loop, siddec->srcpad, NULL); return res; /* ERRORS */ could_not_load: { GST_ELEMENT_ERROR (siddec, LIBRARY, INIT, ("Could not load tune"), ("Could not load tune")); return FALSE; } could_not_negotiate: { GST_ELEMENT_ERROR (siddec, CORE, NEGOTIATION, ("Could not negotiate format"), ("Could not negotiate format")); return FALSE; } could_not_init: { GST_ELEMENT_ERROR (siddec, LIBRARY, INIT, ("Could not initialize song"), ("Could not initialize song")); return FALSE; } } static gboolean gst_siddec_sink_event (GstPad * pad, GstObject * parent, GstEvent * event) { GstSidDec *siddec; gboolean res; siddec = GST_SIDDEC (parent); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_EOS: res = start_play_tune (siddec); break; case GST_EVENT_SEGMENT: res = TRUE; break; default: res = TRUE; break; } gst_event_unref (event); return res; } static GstFlowReturn gst_siddec_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer) { GstSidDec *siddec; guint64 size; siddec = GST_SIDDEC (parent); size = gst_buffer_get_size (buffer); if (siddec->tune_len + size > maxSidtuneFileLen) goto overflow; gst_buffer_extract (buffer, 0, siddec->tune_buffer + siddec->tune_len, size); siddec->tune_len += size; gst_buffer_unref (buffer); return GST_FLOW_OK; /* ERRORS */ overflow: { GST_ELEMENT_ERROR (siddec, STREAM, DECODE, (NULL), ("Input data bigger than allowed buffer size")); return GST_FLOW_ERROR; } } static gboolean gst_siddec_src_convert (GstPad * pad, GstFormat src_format, gint64 src_value, GstFormat * dest_format, gint64 * dest_value) { gboolean res = TRUE; guint scale = 1; GstSidDec *siddec; gint bytes_per_sample; siddec = GST_SIDDEC (gst_pad_get_parent (pad)); if (src_format == *dest_format) { *dest_value = src_value; return TRUE; } bytes_per_sample = (siddec->config->bitsPerSample >> 3) * siddec->config->channels; switch (src_format) { case GST_FORMAT_BYTES: switch (*dest_format) { case GST_FORMAT_DEFAULT: if (bytes_per_sample == 0) return FALSE; *dest_value = src_value / bytes_per_sample; break; case GST_FORMAT_TIME: { gint byterate = bytes_per_sample * siddec->config->frequency; if (byterate == 0) return FALSE; *dest_value = gst_util_uint64_scale_int (src_value, GST_SECOND, byterate); break; } default: res = FALSE; } break; case GST_FORMAT_DEFAULT: switch (*dest_format) { case GST_FORMAT_BYTES: *dest_value = src_value * bytes_per_sample; break; case GST_FORMAT_TIME: if (siddec->config->frequency == 0) return FALSE; *dest_value = gst_util_uint64_scale_int (src_value, GST_SECOND, siddec->config->frequency); break; default: res = FALSE; } break; case GST_FORMAT_TIME: switch (*dest_format) { case GST_FORMAT_BYTES: scale = bytes_per_sample; /* fallthrough */ case GST_FORMAT_DEFAULT: *dest_value = gst_util_uint64_scale_int (src_value, scale * siddec->config->frequency, GST_SECOND); break; default: res = FALSE; } break; default: res = FALSE; } return res; } static gboolean gst_siddec_src_event (GstPad * pad, GstObject * parent, GstEvent * event) { gboolean res = FALSE; switch (GST_EVENT_TYPE (event)) { default: break; } gst_event_unref (event); return res; } static gboolean gst_siddec_src_query (GstPad * pad, GstObject * parent, GstQuery * query) { gboolean res = TRUE; GstSidDec *siddec; siddec = GST_SIDDEC (parent); switch (GST_QUERY_TYPE (query)) { case GST_QUERY_POSITION: { GstFormat format; gint64 current; gst_query_parse_position (query, &format, NULL); /* we only know about our bytes, convert to requested format */ res &= gst_siddec_src_convert (pad, GST_FORMAT_BYTES, siddec->total_bytes, &format, ¤t); if (res) { gst_query_set_position (query, format, current); } break; } default: res = gst_pad_query_default (pad, parent, query); break; } return res; } static void gst_siddec_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstSidDec *siddec = GST_SIDDEC (object); switch (prop_id) { case PROP_TUNE: siddec->tune_number = g_value_get_int (value); break; case PROP_CLOCK: siddec->config->clockSpeed = g_value_get_enum (value); break; case PROP_MEMORY: siddec->config->memoryMode = g_value_get_enum (value); break; case PROP_FILTER: siddec->config->emulateFilter = g_value_get_boolean (value); break; case PROP_MEASURED_VOLUME: siddec->config->measuredVolume = g_value_get_boolean (value); break; case PROP_MOS8580: siddec->config->mos8580 = g_value_get_boolean (value); break; case PROP_BLOCKSIZE: siddec->blocksize = g_value_get_uint (value); break; case PROP_FORCE_SPEED: siddec->config->forceSongSpeed = g_value_get_boolean (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); return; } siddec->engine->setConfig (*siddec->config); } static void gst_siddec_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstSidDec *siddec = GST_SIDDEC (object); switch (prop_id) { case PROP_TUNE: g_value_set_int (value, siddec->tune_number); break; case PROP_CLOCK: g_value_set_enum (value, siddec->config->clockSpeed); break; case PROP_MEMORY: g_value_set_enum (value, siddec->config->memoryMode); break; case PROP_FILTER: g_value_set_boolean (value, siddec->config->emulateFilter); break; case PROP_MEASURED_VOLUME: g_value_set_boolean (value, siddec->config->measuredVolume); break; case PROP_MOS8580: g_value_set_boolean (value, siddec->config->mos8580); break; case PROP_FORCE_SPEED: g_value_set_boolean (value, siddec->config->forceSongSpeed); break; case PROP_BLOCKSIZE: g_value_set_uint (value, siddec->blocksize); break; case PROP_METADATA: g_value_set_boxed (value, NULL); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static gboolean plugin_init (GstPlugin * plugin) { return gst_element_register (plugin, "siddec", GST_RANK_PRIMARY, GST_TYPE_SIDDEC); } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, siddec, "Uses libsidplay to decode .sid files", plugin_init, VERSION, "GPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);