/* GStreamer NUV demuxer * Copyright (C) <2006> Renato Araujo Oliveira Filho * Rosfran Borges * * 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., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ /* Element-Checklist-Version: 5 */ /** * SECTION:element-nuvdemux * @see_also: mythtvsrc * * Demuxes MythTVs NuppelVideo .nuv file into raw or compressed audio and/or * video streams. * * This element currently only supports pull-based scheduling. * * * Example launch line * |[ * gst-launch-1.0 filesrc test.nuv ! nuvdemux name=demux demux.audio_00 ! decodebin ! audioconvert ! audioresample ! autoaudiosink demux.video_00 ! queue ! decodebin ! videoconvert ! videoscale ! autovideosink * ]| Play (parse and decode) an .nuv file and try to output it to * an automatically detected soundcard and videosink. If the NUV file contains * compressed audio or video data, this will only work if you have the * right decoder elements/plugins installed. * * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include "gst/gst-i18n-plugin.h" #include "gstnuvdemux.h" GST_DEBUG_CATEGORY_STATIC (nuvdemux_debug); #define GST_CAT_DEFAULT nuvdemux_debug #define GST_FLOW_ERROR_NO_DATA -101 GST_DEBUG_CATEGORY_EXTERN (GST_CAT_EVENT); static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/x-nuv")); static GstStaticPadTemplate audio_src_template = GST_STATIC_PAD_TEMPLATE ("audio_src", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_STATIC_CAPS_ANY); static GstStaticPadTemplate video_src_template = GST_STATIC_PAD_TEMPLATE ("video_src", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_STATIC_CAPS_ANY); /* NUV Demux indexes init/dispose callers */ static void gst_nuv_demux_finalize (GObject * object); static GstStateChangeReturn gst_nuv_demux_change_state (GstElement * element, GstStateChange transition); static void gst_nuv_demux_loop (GstPad * pad); static GstFlowReturn gst_nuv_demux_chain (GstPad * pad, GstBuffer * buf); static GstFlowReturn gst_nuv_demux_play (GstPad * pad); static gboolean gst_nuv_demux_sink_activate_pull (GstPad * sinkpad, gboolean active); static gboolean gst_nuv_demux_sink_activate (GstPad * sinkpad); static GstFlowReturn gst_nuv_demux_read_bytes (GstNuvDemux * nuv, guint64 size, gboolean move, GstBuffer ** buffer); static void gst_nuv_demux_reset (GstNuvDemux * nuv); static gboolean gst_nuv_demux_handle_sink_event (GstPad * sinkpad, GstEvent * event); static void gst_nuv_demux_destoy_src_pad (GstNuvDemux * nuv); static void gst_nuv_demux_send_eos (GstNuvDemux * nuv); /* GObject methods */ GST_BOILERPLATE (GstNuvDemux, gst_nuv_demux, GstElement, GST_TYPE_ELEMENT); #if G_BYTE_ORDER == G_BIG_ENDIAN static inline gdouble _gdouble_swap_le_be (gdouble * d) { union { guint64 i; gdouble d; } u; u.d = *d; u.i = GUINT64_SWAP_LE_BE (u.i); return u.d; } #define READ_DOUBLE_FROM_LE(d) (_gdouble_swap_le_be((gdouble* ) d)) #else /* G_BYTE_ORDER != G_BIG_ENDIAN */ #define READ_DOUBLE_FROM_LE(d) *((gdouble* ) (d)) #endif /* G_BYTE_ORDER != G_BIG_ENDIAN */ static void gst_nuv_demux_base_init (gpointer klass) { GstElementClass *element_class = GST_ELEMENT_CLASS (klass); gst_element_class_add_static_pad_template (element_class, &audio_src_template); gst_element_class_add_static_pad_template (element_class, &video_src_template); gst_element_class_add_static_pad_template (element_class, &sink_template); gst_element_class_set_static_metadata (element_class, "Nuv demuxer", "Codec/Demuxer", "Demultiplex a MythTV NuppleVideo .nuv file into audio and video", "Renato Araujo Oliveira Filho ," "Rosfran Borges "); } static void gst_nuv_demux_class_init (GstNuvDemuxClass * klass) { GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass); GObjectClass *gobject_class = (GObjectClass *) klass; gobject_class->finalize = gst_nuv_demux_finalize; gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_nuv_demux_change_state); } static void gst_nuv_demux_init (GstNuvDemux * nuv, GstNuvDemuxClass * nuv_class) { nuv->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink"); gst_pad_set_activate_function (nuv->sinkpad, gst_nuv_demux_sink_activate); gst_pad_set_activatepull_function (nuv->sinkpad, gst_nuv_demux_sink_activate_pull); gst_pad_set_chain_function (nuv->sinkpad, GST_DEBUG_FUNCPTR (gst_nuv_demux_chain)); gst_pad_set_event_function (nuv->sinkpad, gst_nuv_demux_handle_sink_event); gst_element_add_pad (GST_ELEMENT (nuv), nuv->sinkpad); nuv->adapter = NULL; nuv->mpeg_buffer = NULL; nuv->h = NULL; nuv->eh = NULL; nuv->fh = NULL; gst_nuv_demux_reset (nuv); } static void gst_nuv_demux_finalize (GObject * object) { GstNuvDemux *nuv = GST_NUV_DEMUX (object); if (nuv->mpeg_buffer != NULL) { gst_buffer_unref (nuv->mpeg_buffer); } gst_nuv_demux_destoy_src_pad (nuv); gst_nuv_demux_reset (nuv); if (nuv->adapter != NULL) { g_object_unref (nuv->adapter); nuv->adapter = NULL; } G_OBJECT_CLASS (parent_class)->finalize (object); } /***************************************************************************** * Utils functions *****************************************************************************/ static gboolean gst_nuv_demux_handle_sink_event (GstPad * sinkpad, GstEvent * event) { gboolean res = FALSE; switch (GST_EVENT_TYPE (event)) { case GST_EVENT_NEWSEGMENT: res = TRUE; break; default: return gst_pad_event_default (sinkpad, event); break; } gst_event_unref (event); return res; } /* HeaderLoad: */ static GstFlowReturn gst_nuv_demux_header_load (GstNuvDemux * nuv, nuv_header ** h_ret) { GstBuffer *buffer = NULL; GstFlowReturn res; nuv_header *h; res = gst_nuv_demux_read_bytes (nuv, 72, TRUE, &buffer); if (res != GST_FLOW_OK) return res; h = g_new0 (nuv_header, 1); memcpy (h->id, buffer->data, 12); memcpy (h->version, buffer->data + 12, 5); h->i_width = GST_READ_UINT32_LE (&buffer->data[20]); h->i_height = GST_READ_UINT32_LE (&buffer->data[24]); h->i_width_desired = GST_READ_UINT32_LE (&buffer->data[28]); h->i_height_desired = GST_READ_UINT32_LE (&buffer->data[32]); h->i_mode = buffer->data[36]; h->d_aspect = READ_DOUBLE_FROM_LE (&buffer->data[40]); h->d_fps = READ_DOUBLE_FROM_LE (&buffer->data[48]); h->i_video_blocks = GST_READ_UINT32_LE (&buffer->data[56]); h->i_audio_blocks = GST_READ_UINT32_LE (&buffer->data[60]); h->i_text_blocks = GST_READ_UINT32_LE (&buffer->data[64]); h->i_keyframe_distance = GST_READ_UINT32_LE (&buffer->data[68]); GST_DEBUG_OBJECT (nuv, "nuv: h=%s v=%s %dx%d a=%f fps=%f v=%d a=%d t=%d kfd=%d", h->id, h->version, h->i_width, h->i_height, h->d_aspect, h->d_fps, h->i_video_blocks, h->i_audio_blocks, h->i_text_blocks, h->i_keyframe_distance); *h_ret = h; gst_buffer_unref (buffer); return res; } static GstFlowReturn gst_nuv_demux_stream_header_data (GstNuvDemux * nuv) { GstFlowReturn res = gst_nuv_demux_header_load (nuv, &nuv->h); if (res == GST_FLOW_OK) nuv->state = GST_NUV_DEMUX_EXTRA_DATA; return res; } /* * Read NUV file tag */ static GstFlowReturn gst_nuv_demux_stream_file_header (GstNuvDemux * nuv) { GstFlowReturn res = GST_FLOW_OK; GstBuffer *file_header = NULL; res = gst_nuv_demux_read_bytes (nuv, 12, FALSE, &file_header); if (res != GST_FLOW_OK) { return res; } else { if (strncmp ((gchar *) file_header->data, "MythTVVideo", 11) || strncmp ((gchar *) file_header->data, "NuppelVideo", 11)) { nuv->state = GST_NUV_DEMUX_HEADER_DATA; } else { GST_DEBUG_OBJECT (nuv, "error parsing file header"); nuv->state = GST_NUV_DEMUX_INVALID_DATA; res = GST_FLOW_ERROR; } } if (file_header != NULL) { gst_buffer_unref (file_header); } return res; } /* FrameHeaderLoad: */ static GstFlowReturn gst_nuv_demux_frame_header_load (GstNuvDemux * nuv, nuv_frame_header ** h_ret) { unsigned char *data; nuv_frame_header *h; GstBuffer *buf = NULL; GstFlowReturn res = gst_nuv_demux_read_bytes (nuv, 12, TRUE, &buf); if (res != GST_FLOW_OK) { if (buf != NULL) { gst_buffer_unref (buf); } return res; } h = g_new0 (nuv_frame_header, 1); data = buf->data; h->i_type = data[0]; h->i_compression = data[1]; h->i_keyframe = data[2]; h->i_filters = data[3]; h->i_timecode = GST_READ_UINT32_LE (&data[4]); h->i_length = GST_READ_UINT32_LE (&data[8]); GST_DEBUG_OBJECT (nuv, "frame hdr: t=%c c=%c k=%d f=0x%x timecode=%d l=%d", h->i_type, h->i_compression ? h->i_compression : ' ', h->i_keyframe ? h->i_keyframe : ' ', h->i_filters, h->i_timecode, h->i_length); *h_ret = h; gst_buffer_unref (buf); return GST_FLOW_OK; } static GstFlowReturn gst_nuv_demux_extended_header_load (GstNuvDemux * nuv, nuv_extended_header ** h_ret) { unsigned char *data; GstBuffer *buff = NULL; nuv_extended_header *h; GstFlowReturn res = gst_nuv_demux_read_bytes (nuv, 512, TRUE, &buff); if (res != GST_FLOW_OK) { if (buff != NULL) { gst_buffer_unref (buff); } return res; } h = g_new0 (nuv_extended_header, 1); data = buff->data; h->i_version = GST_READ_UINT32_LE (&data[0]); h->i_video_fcc = GST_MAKE_FOURCC (data[4], data[5], data[6], data[7]); h->i_audio_fcc = GST_MAKE_FOURCC (data[8], data[9], data[10], data[11]); h->i_audio_sample_rate = GST_READ_UINT32_LE (&data[12]); h->i_audio_bits_per_sample = GST_READ_UINT32_LE (&data[16]); h->i_audio_channels = GST_READ_UINT32_LE (&data[20]); h->i_audio_compression_ratio = GST_READ_UINT32_LE (&data[24]); h->i_audio_quality = GST_READ_UINT32_LE (&data[28]); h->i_rtjpeg_quality = GST_READ_UINT32_LE (&data[32]); h->i_rtjpeg_luma_filter = GST_READ_UINT32_LE (&data[36]); h->i_rtjpeg_chroma_filter = GST_READ_UINT32_LE (&data[40]); h->i_lavc_bitrate = GST_READ_UINT32_LE (&data[44]); h->i_lavc_qmin = GST_READ_UINT32_LE (&data[48]); h->i_lavc_qmin = GST_READ_UINT32_LE (&data[52]); h->i_lavc_maxqdiff = GST_READ_UINT32_LE (&data[56]); h->i_seekable_offset = GST_READ_UINT64_LE (&data[60]); h->i_keyframe_adjust_offset = GST_READ_UINT64_LE (&data[68]); GST_DEBUG_OBJECT (nuv, "ex hdr: v=%d vffc=%4.4s afcc=%4.4s %dHz %dbits ach=%d acr=%d aq=%d" "rtjpeg q=%d lf=%d lc=%d lavc br=%d qmin=%d qmax=%d maxqdiff=%d seekableoff=%" G_GINT64_FORMAT " keyfao=%" G_GINT64_FORMAT, h->i_version, (gchar *) & h->i_video_fcc, (gchar *) & h->i_audio_fcc, h->i_audio_sample_rate, h->i_audio_bits_per_sample, h->i_audio_channels, h->i_audio_compression_ratio, h->i_audio_quality, h->i_rtjpeg_quality, h->i_rtjpeg_luma_filter, h->i_rtjpeg_chroma_filter, h->i_lavc_bitrate, h->i_lavc_qmin, h->i_lavc_qmax, h->i_lavc_maxqdiff, h->i_seekable_offset, h->i_keyframe_adjust_offset); *h_ret = h; gst_buffer_unref (buff); return res; } static gboolean gst_nuv_demux_handle_src_event (GstPad * pad, GstEvent * event) { gst_event_unref (event); return FALSE; } static void gst_nuv_demux_create_pads (GstNuvDemux * nuv) { if (nuv->h->i_video_blocks != 0) { GstCaps *video_caps = NULL; nuv->src_video_pad = gst_pad_new_from_static_template (&video_src_template, "video_src"); video_caps = gst_caps_new_simple ("video/x-divx", "divxversion", G_TYPE_INT, 4, "width", G_TYPE_INT, nuv->h->i_width, "height", G_TYPE_INT, nuv->h->i_height, "framerate", GST_TYPE_FRACTION, (gint) (nuv->h->d_fps * 1000.0f), 1000, "pixel-aspect-ratio", GST_TYPE_FRACTION, (gint) (nuv->h->d_aspect * 1000.0f), 1000, NULL); gst_pad_use_fixed_caps (nuv->src_video_pad); gst_pad_set_active (nuv->src_video_pad, TRUE); gst_pad_set_caps (nuv->src_video_pad, video_caps); gst_pad_set_event_function (nuv->src_video_pad, gst_nuv_demux_handle_src_event); gst_pad_set_active (nuv->src_video_pad, TRUE); gst_element_add_pad (GST_ELEMENT (nuv), nuv->src_video_pad); gst_caps_unref (video_caps); } if (nuv->h->i_audio_blocks != 0) { GstCaps *audio_caps = NULL; nuv->src_audio_pad = gst_pad_new_from_static_template (&audio_src_template, "audio_src"); audio_caps = gst_caps_new_simple ("audio/mpeg", "rate", G_TYPE_INT, nuv->eh->i_audio_sample_rate, "format", GST_TYPE_FOURCC, nuv->eh->i_audio_fcc, "channels", G_TYPE_INT, nuv->eh->i_audio_channels, "mpegversion", G_TYPE_INT, nuv->eh->i_version, NULL); gst_pad_use_fixed_caps (nuv->src_audio_pad); gst_pad_set_active (nuv->src_audio_pad, TRUE); gst_pad_set_caps (nuv->src_audio_pad, audio_caps); gst_pad_set_active (nuv->src_audio_pad, TRUE); gst_element_add_pad (GST_ELEMENT (nuv), nuv->src_audio_pad); gst_pad_set_event_function (nuv->src_audio_pad, gst_nuv_demux_handle_src_event); gst_caps_unref (audio_caps); } gst_element_no_more_pads (GST_ELEMENT (nuv)); } static GstFlowReturn gst_nuv_demux_read_head_frame (GstNuvDemux * nuv) { GstFlowReturn ret = GST_FLOW_OK; ret = gst_nuv_demux_frame_header_load (nuv, &nuv->fh); if (ret != GST_FLOW_OK) return ret; nuv->state = GST_NUV_DEMUX_MOVI; return ret; } static GstFlowReturn gst_nuv_demux_stream_data (GstNuvDemux * nuv) { GstFlowReturn ret = GST_FLOW_OK; GstBuffer *buf = NULL; nuv_frame_header *h = nuv->fh; if (h->i_type == 'R') goto done; if (h->i_length > 0) { ret = gst_nuv_demux_read_bytes (nuv, h->i_length, TRUE, &buf); if (ret != GST_FLOW_OK) return ret; if (h->i_timecode > 0) GST_BUFFER_TIMESTAMP (buf) = h->i_timecode * GST_MSECOND; } switch (h->i_type) { case 'V': { if (!buf) break; GST_BUFFER_OFFSET (buf) = nuv->video_offset; gst_buffer_set_caps (buf, GST_PAD_CAPS (nuv->src_video_pad)); ret = gst_pad_push (nuv->src_video_pad, buf); nuv->video_offset++; break; } case 'A': { if (!buf) break; GST_BUFFER_OFFSET (buf) = nuv->audio_offset; gst_buffer_set_caps (buf, GST_PAD_CAPS (nuv->src_audio_pad)); ret = gst_pad_push (nuv->src_audio_pad, buf); nuv->audio_offset++; break; } case 'S': { switch (h->i_compression) { case 'V': gst_pad_push_event (nuv->src_video_pad, gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0, -1, h->i_timecode)); break; case 'A': gst_pad_push_event (nuv->src_audio_pad, gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0, -1, 0)); break; default: break; } } default: if (buf != NULL) gst_buffer_unref (buf); break; } done: nuv->state = GST_NUV_DEMUX_FRAME_HEADER; g_free (nuv->fh); nuv->fh = NULL; return ret; } static GstFlowReturn gst_nuv_demux_stream_mpeg_data (GstNuvDemux * nuv) { GstFlowReturn ret = GST_FLOW_OK; /* ffmpeg extra data */ nuv->mpeg_buffer = NULL; ret = gst_nuv_demux_read_bytes (nuv, nuv->mpeg_data_size, TRUE, &nuv->mpeg_buffer); if (ret != GST_FLOW_OK) { return GST_FLOW_ERROR; } GST_BUFFER_SIZE (nuv->mpeg_buffer) = nuv->mpeg_data_size; nuv->state = GST_NUV_DEMUX_EXTEND_HEADER; return ret; } static GstFlowReturn gst_nuv_demux_stream_extra_data (GstNuvDemux * nuv) { GstFlowReturn ret = GST_FLOW_OK; /* Load 'D' */ nuv_frame_header *h; ret = gst_nuv_demux_frame_header_load (nuv, &h); if (ret != GST_FLOW_OK) return ret; if (h->i_type != 'D') { g_free (h); return GST_FLOW_ERROR; } if (h->i_length > 0) { if (h->i_compression == 'F') { nuv->state = GST_NUV_DEMUX_MPEG_DATA; } else { g_free (h); return GST_FLOW_ERROR; } } else { nuv->state = GST_NUV_DEMUX_EXTEND_HEADER; } g_free (h); h = NULL; return ret; } static GstFlowReturn gst_nuv_demux_stream_extend_header_data (GstNuvDemux * nuv) { GstFlowReturn ret = GST_FLOW_OK; ret = gst_nuv_demux_extended_header_load (nuv, &nuv->eh); if (ret != GST_FLOW_OK) return ret; gst_nuv_demux_create_pads (nuv); nuv->state = GST_NUV_DEMUX_FRAME_HEADER; return ret; } static GstFlowReturn gst_nuv_demux_stream_extend_header (GstNuvDemux * nuv) { GstBuffer *buf = NULL; GstFlowReturn res = GST_FLOW_OK; res = gst_nuv_demux_read_bytes (nuv, 1, FALSE, &buf); if (res != GST_FLOW_OK) { if (buf != NULL) { gst_buffer_unref (buf); } return res; } if (buf->data[0] == 'X') { nuv_frame_header *h = NULL; gst_buffer_unref (buf); buf = NULL; res = gst_nuv_demux_frame_header_load (nuv, &h); if (res != GST_FLOW_OK) return res; if (h->i_length != 512) { g_free (h); return GST_FLOW_ERROR; } g_free (h); h = NULL; nuv->state = GST_NUV_DEMUX_EXTEND_HEADER_DATA; } else { nuv->state = GST_NUV_DEMUX_INVALID_DATA; GST_ELEMENT_ERROR (nuv, STREAM, DEMUX, (NULL), ("Unsupported extended header (0x%02x)", buf->data[0])); gst_buffer_unref (buf); return GST_FLOW_ERROR; } return res; } static GstFlowReturn gst_nuv_demux_play (GstPad * pad) { GstFlowReturn res = GST_FLOW_OK; GstNuvDemux *nuv = GST_NUV_DEMUX (GST_PAD_PARENT (pad)); switch (nuv->state) { case GST_NUV_DEMUX_START: res = gst_nuv_demux_stream_file_header (nuv); if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) { goto pause; } if (nuv->state != GST_NUV_DEMUX_HEADER_DATA) break; case GST_NUV_DEMUX_HEADER_DATA: res = gst_nuv_demux_stream_header_data (nuv); if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) { goto pause; } if (nuv->state != GST_NUV_DEMUX_EXTRA_DATA) break; case GST_NUV_DEMUX_EXTRA_DATA: res = gst_nuv_demux_stream_extra_data (nuv); if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) { goto pause; } if (nuv->state != GST_NUV_DEMUX_MPEG_DATA) break; case GST_NUV_DEMUX_MPEG_DATA: res = gst_nuv_demux_stream_mpeg_data (nuv); if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) { goto pause; } if (nuv->state != GST_NUV_DEMUX_EXTEND_HEADER) break; case GST_NUV_DEMUX_EXTEND_HEADER: res = gst_nuv_demux_stream_extend_header (nuv); if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) { goto pause; } if (nuv->state != GST_NUV_DEMUX_EXTEND_HEADER_DATA) break; case GST_NUV_DEMUX_EXTEND_HEADER_DATA: res = gst_nuv_demux_stream_extend_header_data (nuv); if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) { goto pause; } if (nuv->state != GST_NUV_DEMUX_FRAME_HEADER) break; case GST_NUV_DEMUX_FRAME_HEADER: res = gst_nuv_demux_read_head_frame (nuv); if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) { goto pause; } if (nuv->state != GST_NUV_DEMUX_MOVI) break; case GST_NUV_DEMUX_MOVI: res = gst_nuv_demux_stream_data (nuv); if ((res != GST_FLOW_OK) && (res != GST_FLOW_CUSTOM_ERROR)) { goto pause; } break; case GST_NUV_DEMUX_INVALID_DATA: goto pause; default: g_assert_not_reached (); } GST_DEBUG_OBJECT (nuv, "state: %d res:%s", nuv->state, gst_flow_get_name (res)); return GST_FLOW_OK; pause: GST_LOG_OBJECT (nuv, "pausing task, reason %s", gst_flow_get_name (res)); gst_pad_pause_task (nuv->sinkpad); if (res == GST_FLOW_UNEXPECTED) { gst_nuv_demux_send_eos (nuv); } else if (res == GST_FLOW_NOT_LINKED || res < GST_FLOW_UNEXPECTED) { GST_ELEMENT_FLOW_ERROR (nuv, res); gst_nuv_demux_send_eos (nuv); } return res; } static void gst_nuv_demux_send_eos (GstNuvDemux * nuv) { gst_element_post_message (GST_ELEMENT (nuv), gst_message_new_segment_done (GST_OBJECT (nuv), GST_FORMAT_TIME, -1)); if (nuv->src_video_pad) gst_pad_push_event (nuv->src_video_pad, gst_event_new_eos ()); if (nuv->src_audio_pad) gst_pad_push_event (nuv->src_audio_pad, gst_event_new_eos ()); } static GstFlowReturn gst_nuv_demux_read_bytes (GstNuvDemux * nuv, guint64 size, gboolean move, GstBuffer ** buffer) { GstFlowReturn ret = GST_FLOW_OK; if (size == 0) { *buffer = gst_buffer_new (); return ret; } if (nuv->mode == 0) { ret = gst_pad_pull_range (nuv->sinkpad, nuv->offset, size, buffer); if (ret == GST_FLOW_OK) { if (move) { nuv->offset += size; } /* got eos */ } else if (ret == GST_FLOW_UNEXPECTED) { gst_nuv_demux_send_eos (nuv); return GST_FLOW_FLUSHING; } } else { if (gst_adapter_available (nuv->adapter) < size) return GST_FLOW_ERROR_NO_DATA; if (move) { *buffer = gst_adapter_take_buffer (nuv->adapter, size); } else { guint8 *data = NULL; data = (guint8 *) gst_adapter_peek (nuv->adapter, size); *buffer = gst_buffer_new (); gst_buffer_set_data (*buffer, data, size); } } return ret; } static gboolean gst_nuv_demux_sink_activate (GstPad * sinkpad) { gboolean res = TRUE; GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (sinkpad)); if (gst_pad_check_pull_range (sinkpad)) { nuv->mode = 0; if (nuv->adapter != NULL) { g_object_unref (nuv->adapter); nuv->adapter = NULL; } res = gst_pad_activate_pull (sinkpad, TRUE); } else { nuv->mode = 1; if (!nuv->adapter) { nuv->adapter = gst_adapter_new (); } res = gst_pad_activate_push (sinkpad, TRUE); } g_object_unref (nuv); return res; } static gboolean gst_nuv_demux_sink_activate_pull (GstPad * sinkpad, gboolean active) { GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (sinkpad)); if (active) { gst_pad_start_task (sinkpad, (GstTaskFunction) gst_nuv_demux_loop, sinkpad, NULL); } else { gst_pad_stop_task (sinkpad); } gst_object_unref (nuv); return TRUE; } static GstFlowReturn gst_nuv_demux_chain (GstPad * pad, GstBuffer * buf) { GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad)); gst_adapter_push (nuv->adapter, buf); return gst_nuv_demux_play (pad); } static void gst_nuv_demux_loop (GstPad * pad) { gst_nuv_demux_play (pad); } static void gst_nuv_demux_reset (GstNuvDemux * nuv) { nuv->state = GST_NUV_DEMUX_START; nuv->mode = 0; nuv->offset = 0; nuv->video_offset = 0; nuv->audio_offset = 0; if (nuv->adapter != NULL) gst_adapter_clear (nuv->adapter); if (nuv->mpeg_buffer != NULL) { gst_buffer_unref (nuv->mpeg_buffer); nuv->mpeg_buffer = NULL; } g_free (nuv->h); nuv->h = NULL; g_free (nuv->eh); nuv->eh = NULL; g_free (nuv->fh); nuv->fh = NULL; } static void gst_nuv_demux_destoy_src_pad (GstNuvDemux * nuv) { if (nuv->src_video_pad) { gst_element_remove_pad (GST_ELEMENT (nuv), nuv->src_video_pad); nuv->src_video_pad = NULL; } if (nuv->src_audio_pad) { gst_element_remove_pad (GST_ELEMENT (nuv), nuv->src_audio_pad); nuv->src_audio_pad = NULL; } } static GstStateChangeReturn gst_nuv_demux_change_state (GstElement * element, GstStateChange transition) { GstStateChangeReturn ret; switch (transition) { case GST_STATE_CHANGE_READY_TO_PAUSED: break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); if (ret == GST_STATE_CHANGE_FAILURE) goto done; switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (element)); gst_nuv_demux_reset (GST_NUV_DEMUX (element)); break; default: break; } done: return ret; } static gboolean plugin_init (GstPlugin * plugin) { GST_DEBUG_CATEGORY_INIT (nuvdemux_debug, "nuvdemux", 0, "Demuxer for NUV streams"); #ifdef ENABLE_NLS GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE, LOCALEDIR); bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR); #endif /* ENABLE_NLS */ if (!gst_element_register (plugin, "nuvdemux", GST_RANK_SECONDARY, GST_TYPE_NUV_DEMUX)) { return FALSE; } return TRUE; } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, nuvdemux, "Demuxes MythTV NuppelVideo files", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)