/* Interplay MVE multiplexer plugin for GStreamer * Copyright (C) 2006 Jens Granseuer * * 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. */ /* gst-launch-0.10 filesrc location=movie.mve ! mvedemux name=d ! video/x-raw-rgb ! mvemux quick=true name=m ! filesink location=test.mve d. ! audio/x-raw-int ! m. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include "gstmvemux.h" #include "mve.h" GST_DEBUG_CATEGORY_STATIC (mvemux_debug); #define GST_CAT_DEFAULT mvemux_debug extern GstFlowReturn mve_encode_frame8 (GstMveMux * mve, GstBuffer * frame, const guint32 * palette, guint16 max_data); extern GstFlowReturn mve_encode_frame16 (GstMveMux * mve, GstBuffer * frame, guint16 max_data); extern gint mve_compress_audio (guint8 * dest, const guint8 * src, guint16 len, guint8 channels); static const char mve_preamble[] = MVE_PREAMBLE; enum { ARG_0, ARG_AUDIO_COMPRESSION, ARG_VIDEO_QUICK_ENCODING, ARG_VIDEO_SCREEN_WIDTH, ARG_VIDEO_SCREEN_HEIGHT }; #define MVE_MUX_DEFAULT_COMPRESSION FALSE #define MVE_MUX_DEFAULT_SCREEN_WIDTH 640 #define MVE_MUX_DEFAULT_SCREEN_HEIGHT 480 enum MveMuxState { MVE_MUX_STATE_INITIAL, /* initial state */ MVE_MUX_STATE_CONNECTED, /* linked, caps set, header not written */ MVE_MUX_STATE_PREBUFFER, /* prebuffering audio data */ MVE_MUX_STATE_MOVIE, /* writing the movie */ MVE_MUX_STATE_EOS }; static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/x-mve") ); static GstStaticPadTemplate video_sink_factory = GST_STATIC_PAD_TEMPLATE ("video", GST_PAD_SINK, GST_PAD_REQUEST, GST_STATIC_CAPS ("video/x-raw-rgb, " "width = (int) [ 24, 1600 ], " "height = (int) [ 24, 1200 ], " "framerate = (fraction) [ 1, MAX ], " "bpp = (int) 16, " "depth = (int) 15, " "endianness = (int) BYTE_ORDER, " "red_mask = (int) 31744, " "green_mask = (int) 992, " "blue_mask = (int) 31; " "video/x-raw-rgb, " "bpp = (int) 8, " "depth = (int) 8, " "width = (int) [ 24, 1600 ], " "height = (int) [ 24, 1200 ], " "framerate = (fraction) [ 1, MAX ], " "endianness = (int) BYTE_ORDER")); static GstStaticPadTemplate audio_sink_factory = GST_STATIC_PAD_TEMPLATE ("audio", GST_PAD_SINK, GST_PAD_REQUEST, GST_STATIC_CAPS ("audio/x-raw-int, " "width = (int) 8, " "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ], " "depth = (int) 8, " "signed = (boolean) false; " "audio/x-raw-int, " "width = (int) 16, " "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ], " "depth = (int) 16, " "signed = (boolean) true, " "endianness = (int) BYTE_ORDER")); static void gst_mve_mux_base_init (GstMveMuxClass * klass); static void gst_mve_mux_class_init (GstMveMuxClass * klass); static void gst_mve_mux_init (GstMveMux * mvemux); static GstElementClass *parent_class = NULL; static void gst_mve_mux_reset (GstMveMux * mvemux) { mvemux->state = MVE_MUX_STATE_INITIAL; mvemux->stream_time = 0; mvemux->stream_offset = 0; mvemux->timer = 0; mvemux->frame_duration = GST_CLOCK_TIME_NONE; mvemux->width = 0; mvemux->height = 0; mvemux->screen_width = MVE_MUX_DEFAULT_SCREEN_WIDTH; mvemux->screen_height = MVE_MUX_DEFAULT_SCREEN_HEIGHT; mvemux->bpp = 0; mvemux->video_frames = 0; mvemux->pal_changed = FALSE; mvemux->pal_first_color = 0; mvemux->pal_colors = MVE_PALETTE_COUNT; mvemux->quick_encoding = TRUE; mvemux->bps = 0; mvemux->rate = 0; mvemux->channels = 0; mvemux->compression = MVE_MUX_DEFAULT_COMPRESSION; mvemux->next_ts = 0; mvemux->max_ts = 0; mvemux->spf = 0; mvemux->lead_frames = 0; mvemux->audio_frames = 0; mvemux->chunk_has_palette = FALSE; mvemux->chunk_has_audio = FALSE; mvemux->audio_pad_eos = TRUE; mvemux->video_pad_eos = TRUE; g_free (mvemux->chunk_code_map); mvemux->chunk_code_map = NULL; if (mvemux->chunk_video != NULL) { g_byte_array_free (mvemux->chunk_video, TRUE); mvemux->chunk_video = NULL; } if (mvemux->chunk_audio != NULL) { g_byte_array_free (mvemux->chunk_audio, TRUE); mvemux->chunk_audio = NULL; } if (mvemux->last_frame != NULL) { gst_buffer_unref (mvemux->last_frame); mvemux->last_frame = NULL; } if (mvemux->second_last_frame != NULL) { gst_buffer_unref (mvemux->second_last_frame); mvemux->second_last_frame = NULL; } if (mvemux->audio_buffer != NULL) { g_queue_foreach (mvemux->audio_buffer, (GFunc) gst_mini_object_unref, NULL); g_queue_free (mvemux->audio_buffer); } mvemux->audio_buffer = g_queue_new (); if (mvemux->video_buffer != NULL) { g_queue_foreach (mvemux->video_buffer, (GFunc) gst_mini_object_unref, NULL); g_queue_free (mvemux->video_buffer); } mvemux->video_buffer = g_queue_new (); } static void gst_mve_mux_pad_link (GstPad * pad, GstPad * peer, gpointer data) { GstMveMux *mvemux = GST_MVE_MUX (data); if (pad == mvemux->audiosink) { mvemux->audio_pad_connected = TRUE; } else if (pad == mvemux->videosink) { mvemux->video_pad_connected = TRUE; } else { g_assert_not_reached (); } GST_DEBUG_OBJECT (mvemux, "pad '%s' connected", GST_PAD_NAME (pad)); } static void gst_mve_mux_pad_unlink (GstPad * pad, GstPad * peer, gpointer data) { GstMveMux *mvemux = GST_MVE_MUX (data); if (pad == mvemux->audiosink) { mvemux->audio_pad_connected = FALSE; } else if (pad == mvemux->videosink) { mvemux->video_pad_connected = FALSE; } else { g_assert_not_reached (); } GST_DEBUG_OBJECT (mvemux, "pad '%s' unlinked", GST_PAD_NAME (pad)); } static void gst_mve_mux_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstMveMux *mvemux; g_return_if_fail (GST_IS_MVE_MUX (object)); mvemux = GST_MVE_MUX (object); switch (prop_id) { case ARG_AUDIO_COMPRESSION: g_value_set_boolean (value, mvemux->compression); break; case ARG_VIDEO_QUICK_ENCODING: g_value_set_boolean (value, mvemux->quick_encoding); break; case ARG_VIDEO_SCREEN_WIDTH: g_value_set_uint (value, mvemux->screen_width); break; case ARG_VIDEO_SCREEN_HEIGHT: g_value_set_uint (value, mvemux->screen_height); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_mve_mux_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstMveMux *mvemux; g_return_if_fail (GST_IS_MVE_MUX (object)); mvemux = GST_MVE_MUX (object); switch (prop_id) { case ARG_AUDIO_COMPRESSION: mvemux->compression = g_value_get_boolean (value); break; case ARG_VIDEO_QUICK_ENCODING: mvemux->quick_encoding = g_value_get_boolean (value); break; case ARG_VIDEO_SCREEN_WIDTH: mvemux->screen_width = g_value_get_uint (value); break; case ARG_VIDEO_SCREEN_HEIGHT: mvemux->screen_height = g_value_get_uint (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static GstStateChangeReturn gst_mve_mux_change_state (GstElement * element, GstStateChange transition) { GstMveMux *mvemux; g_return_val_if_fail (GST_IS_MVE_MUX (element), GST_STATE_CHANGE_FAILURE); mvemux = GST_MVE_MUX (element); if (GST_ELEMENT_CLASS (parent_class)->change_state) { GstStateChangeReturn ret; ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); if (ret != GST_STATE_CHANGE_SUCCESS) return ret; } switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: gst_mve_mux_reset (mvemux); break; default: break; } return GST_STATE_CHANGE_SUCCESS; } static const GstBuffer * gst_mve_mux_palette_from_buffer (GstBuffer * buf) { const GstBuffer *palette = NULL; GstCaps *caps = GST_BUFFER_CAPS (buf); if (caps != NULL) { GstStructure *str = gst_caps_get_structure (caps, 0); const GValue *pal = gst_structure_get_value (str, "palette_data"); if (pal != NULL) { palette = gst_value_get_buffer (pal); if (GST_BUFFER_SIZE (palette) < 256 * 4) palette = NULL; } } return palette; } static GstFlowReturn gst_mve_mux_palette_from_current_frame (GstMveMux * mvemux, const GstBuffer ** pal) { GstBuffer *buf = g_queue_peek_head (mvemux->video_buffer); /* get palette from buffer */ *pal = gst_mve_mux_palette_from_buffer (buf); if (*pal == NULL) { GST_ERROR_OBJECT (mvemux, "video buffer has no palette data"); return GST_FLOW_ERROR; } return GST_FLOW_OK; } static void gst_mve_mux_palette_analyze (GstMveMux * mvemux, const GstBuffer * pal, guint16 * first, guint16 * last) { guint i; guint32 *col1; col1 = (guint32 *) GST_BUFFER_DATA (pal); /* compare current palette against last frame */ if (mvemux->last_frame == NULL) { /* ignore 0,0,0 entries but make sure we get at least one color */ /* FIXME: is ignoring 0,0,0 safe? possibly depends on player impl */ for (i = 0; i < MVE_PALETTE_COUNT; ++i) { if (col1[i] != 0) { *first = i; break; } } if (i == MVE_PALETTE_COUNT) { *first = *last = 0; } else { for (i = MVE_PALETTE_COUNT - 1; i >= 0; --i) { if (col1[i] != 0) { *last = i; break; } } } } else { const GstBuffer *last_pal; guint32 *col2; last_pal = gst_mve_mux_palette_from_buffer (mvemux->last_frame); g_return_if_fail (last_pal != NULL); col2 = (guint32 *) GST_BUFFER_DATA (last_pal); for (i = 0; i < MVE_PALETTE_COUNT; ++i) { if (col1[i] != col2[i]) { *first = i; break; } } for (i = MVE_PALETTE_COUNT - 1; i >= 0; --i) { if (col1[i] != col2[i]) { *last = i; break; } } } GST_DEBUG_OBJECT (mvemux, "palette first:%d, last:%d", *first, *last); } static gboolean gst_mve_mux_palette_changed (GstMveMux * mvemux, const GstBuffer * pal) { const GstBuffer *last_pal; g_return_val_if_fail (mvemux->last_frame != NULL, TRUE); last_pal = gst_mve_mux_palette_from_buffer (mvemux->last_frame); if (last_pal == NULL) return TRUE; return memcmp (GST_BUFFER_DATA (last_pal), GST_BUFFER_DATA (pal), MVE_PALETTE_COUNT * 4) != 0; } static GstFlowReturn gst_mve_mux_push_buffer (GstMveMux * mvemux, GstBuffer * buffer) { GST_BUFFER_OFFSET (buffer) = mvemux->stream_offset; mvemux->stream_offset += GST_BUFFER_SIZE (buffer); GST_BUFFER_OFFSET_END (buffer) = mvemux->stream_offset; return gst_pad_push (mvemux->source, buffer); } /* returns TRUE if audio segment is complete */ static gboolean gst_mve_mux_audio_data (GstMveMux * mvemux) { gboolean complete = FALSE; while (!complete) { GstBuffer *buf; GstClockTime buftime; GstClockTime duration; GstClockTime t_needed; gint b_needed; gint len; buf = g_queue_peek_head (mvemux->audio_buffer); if (buf == NULL) return (mvemux->audio_pad_eos && mvemux->chunk_audio) || (mvemux->stream_time + mvemux->frame_duration < mvemux->max_ts); buftime = GST_BUFFER_TIMESTAMP (buf); duration = GST_BUFFER_DURATION (buf); /* FIXME: adjust buffer timestamps using segment info */ /* assume continuous buffers on invalid time stamps */ if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (buftime))) buftime = mvemux->next_ts; if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (duration))) duration = gst_util_uint64_scale_int (mvemux->frame_duration, GST_BUFFER_SIZE (buf), mvemux->spf); if (mvemux->chunk_audio) { b_needed = mvemux->spf - mvemux->chunk_audio->len; t_needed = (gint) gst_util_uint64_scale_int (mvemux->frame_duration, b_needed, mvemux->spf); } else { b_needed = mvemux->spf; t_needed = mvemux->frame_duration; } if (buftime > mvemux->next_ts + t_needed) { /* future buffer - fill chunk with silence */ GST_DEBUG_OBJECT (mvemux, "future buffer, inserting silence"); /* if we already have a chunk started, fill it otherwise we'll simply insert a silence chunk */ if (mvemux->chunk_audio) { len = mvemux->chunk_audio->len; g_byte_array_set_size (mvemux->chunk_audio, mvemux->spf); memset (mvemux->chunk_audio->data + len, 0, mvemux->spf - len); } mvemux->next_ts += t_needed; complete = TRUE; } else if (buftime + duration <= mvemux->next_ts) { /* past buffer - drop */ GST_DEBUG_OBJECT (mvemux, "dropping past buffer"); g_queue_pop_head (mvemux->audio_buffer); gst_buffer_unref (buf); } else { /* our data starts somewhere in this buffer */ const guint8 *bufdata = GST_BUFFER_DATA (buf); gint b_available = GST_BUFFER_SIZE (buf); gint align = (mvemux->bps / 8) * mvemux->channels - 1; gint offset; if (mvemux->chunk_audio == NULL) mvemux->chunk_audio = g_byte_array_sized_new (mvemux->spf); if (buftime >= mvemux->next_ts) { /* insert silence as necessary */ len = mvemux->chunk_audio->len; offset = (gint) gst_util_uint64_scale_int (mvemux->spf, buftime - mvemux->next_ts, mvemux->frame_duration); offset = (offset + align) & ~align; if (len < offset) { g_byte_array_set_size (mvemux->chunk_audio, offset); memset (mvemux->chunk_audio->data + len, 0, offset - len); b_needed -= offset - len; mvemux->next_ts += gst_util_uint64_scale_int (mvemux->frame_duration, offset - len, mvemux->spf); } offset = 0; } else { offset = (gint) gst_util_uint64_scale_int (mvemux->spf, mvemux->next_ts - buftime, mvemux->frame_duration); offset = (offset + align) & ~align; } g_assert (offset <= b_available); bufdata += offset; b_available -= offset; if (b_needed > b_available) b_needed = b_available; if (mvemux->bps == 8) { g_byte_array_append (mvemux->chunk_audio, bufdata, b_needed); } else { guint i; gint16 *sample = (gint16 *) bufdata; guint8 s[2]; len = b_needed / 2; for (i = 0; i < len; ++i) { s[0] = (*sample) & 0x00FF; s[1] = ((*sample) & 0xFF00) >> 8; g_byte_array_append (mvemux->chunk_audio, s, 2); ++sample; } } mvemux->next_ts += gst_util_uint64_scale_int (mvemux->frame_duration, b_needed, mvemux->spf); if (b_available - b_needed == 0) { /* consumed buffer */ GST_LOG_OBJECT (mvemux, "popping consumed buffer"); g_queue_pop_head (mvemux->audio_buffer); gst_buffer_unref (buf); } complete = (mvemux->chunk_audio->len >= mvemux->spf); } if (mvemux->max_ts < mvemux->next_ts) mvemux->max_ts = mvemux->next_ts; } return complete; } static GstFlowReturn gst_mve_mux_start_movie (GstMveMux * mvemux) { GstFlowReturn res; GstBuffer *buf; GST_DEBUG_OBJECT (mvemux, "writing movie preamble"); res = gst_pad_alloc_buffer (mvemux->source, 0, MVE_PREAMBLE_SIZE, GST_PAD_CAPS (mvemux->source), &buf); if (res != GST_FLOW_OK) return res; gst_pad_push_event (mvemux->source, gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_BYTES, 0, -1, 0)); memcpy (GST_BUFFER_DATA (buf), mve_preamble, MVE_PREAMBLE_SIZE); return gst_mve_mux_push_buffer (mvemux, buf); } static GstFlowReturn gst_mve_mux_end_movie (GstMveMux * mvemux) { GstFlowReturn res; GstBuffer *buf; guint8 *bufdata; GST_DEBUG_OBJECT (mvemux, "writing movie shutdown chunk"); res = gst_pad_alloc_buffer (mvemux->source, 0, 16, GST_PAD_CAPS (mvemux->source), &buf); if (res != GST_FLOW_OK) return res; bufdata = GST_BUFFER_DATA (buf); GST_WRITE_UINT16_LE (bufdata, 8); /* shutdown chunk */ GST_WRITE_UINT16_LE (bufdata + 2, MVE_CHUNK_SHUTDOWN); GST_WRITE_UINT16_LE (bufdata + 4, 0); /* end movie segment */ bufdata[6] = MVE_OC_END_OF_STREAM; bufdata[7] = 0; GST_WRITE_UINT16_LE (bufdata + 8, 0); /* end chunk segment */ bufdata[10] = MVE_OC_END_OF_CHUNK; bufdata[11] = 0; GST_WRITE_UINT16_LE (bufdata + 12, 0); /* end movie chunk */ GST_WRITE_UINT16_LE (bufdata + 14, MVE_CHUNK_END); return gst_mve_mux_push_buffer (mvemux, buf); } static GstFlowReturn gst_mve_mux_init_video_chunk (GstMveMux * mvemux, const GstBuffer * pal) { GstFlowReturn res; GstBuffer *buf; guint8 *bufdata; guint16 buf_size; guint16 first_col = 0, last_col = 0; guint pal_size = 0; GST_DEBUG_OBJECT (mvemux, "init-video chunk w:%d, h:%d, bpp:%d", mvemux->width, mvemux->height, mvemux->bpp); buf_size = 4; /* chunk header */ buf_size += 4 + 6; /* init video mode segment */ buf_size += 4 + 8; /* create video buffers segment */ if (mvemux->bpp == 8) { g_return_val_if_fail (pal != NULL, GST_FLOW_ERROR); /* install palette segment */ gst_mve_mux_palette_analyze (mvemux, pal, &first_col, &last_col); pal_size = (last_col - first_col + 1) * 3; buf_size += 4 + 4 + pal_size; } buf_size += 4 + 0; /* end chunk segment */ res = gst_pad_alloc_buffer (mvemux->source, 0, buf_size, GST_PAD_CAPS (mvemux->source), &buf); if (res != GST_FLOW_OK) return res; bufdata = GST_BUFFER_DATA (buf); GST_WRITE_UINT16_LE (bufdata, buf_size - 4); GST_WRITE_UINT16_LE (bufdata + 2, MVE_CHUNK_INIT_VIDEO); GST_WRITE_UINT16_LE (bufdata + 4, 6); bufdata[6] = MVE_OC_VIDEO_MODE; bufdata[7] = 0; GST_WRITE_UINT16_LE (bufdata + 8, mvemux->screen_width); /* screen width */ GST_WRITE_UINT16_LE (bufdata + 10, mvemux->screen_height); /* screen height */ GST_WRITE_UINT16_LE (bufdata + 12, 0); /* ??? - flags */ GST_WRITE_UINT16_LE (bufdata + 14, 8); bufdata[16] = MVE_OC_VIDEO_BUFFERS; bufdata[17] = 2; GST_WRITE_UINT16_LE (bufdata + 18, mvemux->width >> 3); /* buffer width */ GST_WRITE_UINT16_LE (bufdata + 20, mvemux->height >> 3); /* buffer height */ GST_WRITE_UINT16_LE (bufdata + 22, 1); /* buffer count */ GST_WRITE_UINT16_LE (bufdata + 24, (mvemux->bpp >> 3) - 1); /* true color */ bufdata += 26; if (mvemux->bpp == 8) { /* TODO: check whether we really need to update the entire palette (or at all) */ gint i; guint32 *col; GST_DEBUG_OBJECT (mvemux, "installing palette"); GST_WRITE_UINT16_LE (bufdata, 4 + pal_size); bufdata[2] = MVE_OC_PALETTE; bufdata[3] = 0; GST_WRITE_UINT16_LE (bufdata + 4, first_col); /* first color index */ GST_WRITE_UINT16_LE (bufdata + 6, last_col - first_col + 1); /* number of colors */ bufdata += 8; col = (guint32 *) GST_BUFFER_DATA (pal); for (i = first_col; i <= last_col; ++i) { /* convert from 8-bit palette to 6-bit VGA */ guint32 rgb = col[i]; (*bufdata) = ((rgb & 0x00FF0000) >> 16) >> 2; ++bufdata; (*bufdata) = ((rgb & 0x0000FF00) >> 8) >> 2; ++bufdata; (*bufdata) = (rgb & 0x000000FF) >> 2; ++bufdata; } mvemux->pal_changed = TRUE; mvemux->pal_first_color = first_col; mvemux->pal_colors = last_col - first_col + 1; } GST_WRITE_UINT16_LE (bufdata, 0); bufdata[2] = MVE_OC_END_OF_CHUNK; bufdata[3] = 0; return gst_mve_mux_push_buffer (mvemux, buf); } static GstFlowReturn gst_mve_mux_init_audio_chunk (GstMveMux * mvemux) { GstFlowReturn res; GstBuffer *buf; guint16 buf_size; guint8 *bufdata; guint16 flags = 0; gint align; GST_DEBUG_OBJECT (mvemux, "init-audio chunk rate:%d, chan:%d, bps:%d, comp:%d", mvemux->rate, mvemux->channels, mvemux->bps, mvemux->compression); if (G_UNLIKELY (mvemux->bps == 8 && mvemux->compression)) { GST_INFO_OBJECT (mvemux, "compression only supported for 16-bit samples, disabling"); mvemux->compression = FALSE; } /* calculate sample data per frame */ align = (mvemux->bps / 8) * mvemux->channels; mvemux->spf = (guint16) (gst_util_uint64_scale_int (align * mvemux->rate, mvemux->frame_duration, GST_SECOND) + align - 1) & ~(align - 1); /* prebuffer approx. 1 second of audio data */ mvemux->lead_frames = align * mvemux->rate / mvemux->spf; GST_DEBUG_OBJECT (mvemux, "calculated spf:%d, lead frames:%d", mvemux->spf, mvemux->lead_frames); /* chunk header + init video mode segment + end chunk segment */ buf_size = 4 + (4 + 10) + 4; res = gst_pad_alloc_buffer (mvemux->source, 0, buf_size, GST_PAD_CAPS (mvemux->source), &buf); if (res != GST_FLOW_OK) return res; bufdata = GST_BUFFER_DATA (buf); if (mvemux->channels == 2) flags |= MVE_AUDIO_STEREO; if (mvemux->bps == 16) flags |= MVE_AUDIO_16BIT; if (mvemux->compression) flags |= MVE_AUDIO_COMPRESSED; GST_WRITE_UINT16_LE (bufdata, buf_size - 4); GST_WRITE_UINT16_LE (bufdata + 2, MVE_CHUNK_INIT_AUDIO); GST_WRITE_UINT16_LE (bufdata + 4, 10); bufdata[6] = MVE_OC_AUDIO_BUFFERS; bufdata[7] = 1; GST_WRITE_UINT16_LE (bufdata + 8, 0); /* ??? */ GST_WRITE_UINT16_LE (bufdata + 10, flags); /* flags */ GST_WRITE_UINT16_LE (bufdata + 12, mvemux->rate); /* sample rate */ GST_WRITE_UINT32_LE (bufdata + 14, /* minimum audio buffer size */ mvemux->spf * mvemux->lead_frames); GST_WRITE_UINT16_LE (bufdata + 18, 0); bufdata[20] = MVE_OC_END_OF_CHUNK; bufdata[21] = 0; return gst_mve_mux_push_buffer (mvemux, buf); } static guint8 * gst_mve_mux_write_audio_segments (GstMveMux * mvemux, guint8 * data) { GByteArray *chunk = mvemux->chunk_audio; guint16 silent_mask; GST_LOG_OBJECT (mvemux, "writing audio data"); /* audio data */ if (chunk) { guint16 len = mvemux->compression ? chunk->len / 2 + mvemux->channels : chunk->len; silent_mask = 0xFFFE; GST_WRITE_UINT16_LE (data, 6 + len); data[2] = MVE_OC_AUDIO_DATA; data[3] = 0; GST_WRITE_UINT16_LE (data + 4, mvemux->audio_frames); /* frame number */ GST_WRITE_UINT16_LE (data + 6, 0x0001); /* stream mask */ GST_WRITE_UINT16_LE (data + 8, chunk->len); /* (uncompressed) data length */ data += 10; if (mvemux->compression) mve_compress_audio (data, chunk->data, len, mvemux->channels); else memcpy (data, chunk->data, chunk->len); data += len; g_byte_array_free (chunk, TRUE); mvemux->chunk_audio = NULL; } else silent_mask = 0xFFFF; /* audio data (silent) */ GST_WRITE_UINT16_LE (data, 6); data[2] = MVE_OC_AUDIO_SILENCE; data[3] = 0; GST_WRITE_UINT16_LE (data + 4, mvemux->audio_frames++); /* frame number */ GST_WRITE_UINT16_LE (data + 6, silent_mask); /* stream mask */ GST_WRITE_UINT16_LE (data + 8, mvemux->spf); /* (imaginary) data length */ data += 10; return data; } static GstFlowReturn gst_mve_mux_prebuffer_audio_chunk (GstMveMux * mvemux) { GstFlowReturn ret; GstBuffer *chunk; guint16 size; guint8 *data; /* calculate chunk size */ size = 4; /* chunk header */ if (mvemux->chunk_audio) { size += 4 + 6 + /* audio data */ (mvemux->compression ? mvemux->chunk_audio->len / 2 + mvemux->channels : mvemux->chunk_audio->len); } size += 4 + 6; /* audio data silent */ size += 4; /* end chunk */ ret = gst_pad_alloc_buffer (mvemux->source, 0, size, GST_PAD_CAPS (mvemux->source), &chunk); if (ret != GST_FLOW_OK) return ret; data = GST_BUFFER_DATA (chunk); /* assemble chunk */ GST_WRITE_UINT16_LE (data, size - 4); GST_WRITE_UINT16_LE (data + 2, MVE_CHUNK_AUDIO_ONLY); data += 4; data = gst_mve_mux_write_audio_segments (mvemux, data); /* end chunk */ GST_WRITE_UINT16_LE (data, 0); data[2] = MVE_OC_END_OF_CHUNK; data[3] = 0; if (mvemux->audio_frames >= mvemux->lead_frames) mvemux->state = MVE_MUX_STATE_MOVIE; mvemux->stream_time += mvemux->frame_duration; GST_DEBUG_OBJECT (mvemux, "pushing audio chunk"); return gst_mve_mux_push_buffer (mvemux, chunk); } static GstFlowReturn gst_mve_mux_push_chunk (GstMveMux * mvemux) { GstFlowReturn ret; GstBuffer *chunk; GstBuffer *frame; guint32 size; guint16 cm_size = 0; guint8 *data; /* calculate chunk size */ size = 4; /* chunk header */ if (G_UNLIKELY (mvemux->timer == 0)) { /* we need to insert a timer segment */ size += 4 + 6; } if (mvemux->audio_pad_connected) { if (mvemux->chunk_audio) { size += 4 + 6 + /* audio data */ (mvemux->compression ? mvemux->chunk_audio->len / 2 + mvemux->channels : mvemux->chunk_audio->len); } size += 4 + 6; /* audio data silent */ } size += 4 + 6; /* play video */ size += 4; /* play audio; present even if no audio stream */ size += 4; /* end chunk */ /* we must encode video only after we have the audio side covered, since only then we can tell what size limit the video data must adhere to */ frame = g_queue_pop_head (mvemux->video_buffer); if (frame != NULL) { cm_size = (((mvemux->width * mvemux->height) >> 6) + 1) >> 1; size += 4 + cm_size; /* code map */ size += 4 + 14; /* video data header */ /* make sure frame is writable since the encoder may want to modify it */ frame = gst_buffer_make_writable (frame); if (mvemux->bpp == 8) { const GstBuffer *pal = gst_mve_mux_palette_from_buffer (frame); if (pal == NULL) ret = GST_FLOW_ERROR; else ret = mve_encode_frame8 (mvemux, frame, (guint32 *) GST_BUFFER_DATA (pal), G_MAXUINT16 - size); } else ret = mve_encode_frame16 (mvemux, frame, G_MAXUINT16 - size); if (mvemux->second_last_frame != NULL) gst_buffer_unref (mvemux->second_last_frame); mvemux->second_last_frame = mvemux->last_frame; mvemux->last_frame = frame; if (ret != GST_FLOW_OK) return ret; size += mvemux->chunk_video->len; } if (size > G_MAXUINT16) { GST_ELEMENT_ERROR (mvemux, STREAM, ENCODE, (NULL), ("encoding frame %d failed: maximum block size exceeded (%lu)", mvemux->video_frames + 1, size)); return GST_FLOW_ERROR; } ret = gst_pad_alloc_buffer (mvemux->source, 0, size, GST_PAD_CAPS (mvemux->source), &chunk); if (ret != GST_FLOW_OK) return ret; data = GST_BUFFER_DATA (chunk); /* assemble chunk */ GST_WRITE_UINT16_LE (data, size - 4); GST_WRITE_UINT16_LE (data + 2, MVE_CHUNK_VIDEO); data += 4; if (G_UNLIKELY (mvemux->timer == 0)) { /* insert a timer segment */ mvemux->timer = mvemux->frame_duration / GST_USECOND / 8; GST_WRITE_UINT16_LE (data, 6); data[2] = MVE_OC_CREATE_TIMER; data[3] = 0; GST_WRITE_UINT32_LE (data + 4, mvemux->timer); /* timer rate */ GST_WRITE_UINT16_LE (data + 8, 8); /* timer subdivision */ data += 10; } /* code map */ if (mvemux->chunk_video) { GST_WRITE_UINT16_LE (data, cm_size); data[2] = MVE_OC_CODE_MAP; data[3] = 0; memcpy (data + 4, mvemux->chunk_code_map, cm_size); data += 4 + cm_size; } if (mvemux->audio_pad_connected) data = gst_mve_mux_write_audio_segments (mvemux, data); if (mvemux->chunk_video) { GST_LOG_OBJECT (mvemux, "writing video data"); /* video data */ GST_WRITE_UINT16_LE (data, 14 + mvemux->chunk_video->len); data[2] = MVE_OC_VIDEO_DATA; data[3] = 0; GST_WRITE_UINT16_LE (data + 6, mvemux->video_frames); /* previous frame */ GST_WRITE_UINT16_LE (data + 4, ++mvemux->video_frames); /* current frame */ GST_WRITE_UINT16_LE (data + 8, 0); /* x offset */ GST_WRITE_UINT16_LE (data + 10, 0); /* y offset */ GST_WRITE_UINT16_LE (data + 12, mvemux->width >> 3); /* buffer width */ GST_WRITE_UINT16_LE (data + 14, mvemux->height >> 3); /* buffer height */ GST_WRITE_UINT16_LE (data + 16, /* flags */ (mvemux->video_frames == 1 ? 0 : MVE_VIDEO_DELTA_FRAME)); memcpy (data + 18, mvemux->chunk_video->data, mvemux->chunk_video->len); data += 18 + mvemux->chunk_video->len; g_byte_array_free (mvemux->chunk_video, TRUE); mvemux->chunk_video = NULL; } /* play audio */ GST_WRITE_UINT16_LE (data, 0); data[2] = MVE_OC_PLAY_AUDIO; data[3] = 0; data += 4; /* play video */ GST_WRITE_UINT16_LE (data, 6); data[2] = MVE_OC_PLAY_VIDEO; data[3] = 1; /* this block is only set to non-zero on palette changes in 8-bit mode */ if (mvemux->pal_changed) { GST_WRITE_UINT16_LE (data + 4, mvemux->pal_first_color); /* index of first color */ GST_WRITE_UINT16_LE (data + 6, mvemux->pal_colors); /* number of colors */ mvemux->pal_changed = FALSE; } else { GST_WRITE_UINT32_LE (data + 4, 0); } GST_WRITE_UINT16_LE (data + 8, 0); /* ??? */ data += 10; /* end chunk */ GST_WRITE_UINT16_LE (data, 0); data[2] = MVE_OC_END_OF_CHUNK; data[3] = 0; mvemux->chunk_has_palette = FALSE; mvemux->chunk_has_audio = FALSE; mvemux->stream_time += mvemux->frame_duration; GST_LOG_OBJECT (mvemux, "pushing video chunk"); return gst_mve_mux_push_buffer (mvemux, chunk); } static GstFlowReturn gst_mve_mux_chain (GstPad * sinkpad, GstBuffer * inbuf) { GstMveMux *mvemux = GST_MVE_MUX (GST_PAD_PARENT (sinkpad)); GstFlowReturn ret = GST_FLOW_OK; const GstBuffer *palette; gboolean audio_ok, video_ok; /* need to serialize the buffers */ g_mutex_lock (mvemux->lock); if (G_LIKELY (inbuf != NULL)) { /* TODO: see _sink_event... */ if (sinkpad == mvemux->audiosink) g_queue_push_tail (mvemux->audio_buffer, inbuf); else if (sinkpad == mvemux->videosink) g_queue_push_tail (mvemux->video_buffer, inbuf); else g_assert_not_reached (); } /* TODO: this is gross... */ if (G_UNLIKELY (mvemux->state == MVE_MUX_STATE_INITIAL)) { GST_DEBUG_OBJECT (mvemux, "waiting for caps"); goto done; } /* now actually try to mux something */ if (G_UNLIKELY (mvemux->state == MVE_MUX_STATE_CONNECTED)) { palette = NULL; if (mvemux->bpp == 8) { /* we need to add palette info to the init chunk */ if (g_queue_is_empty (mvemux->video_buffer)) goto done; /* wait for more data */ ret = gst_mve_mux_palette_from_current_frame (mvemux, &palette); if (ret != GST_FLOW_OK) goto done; } gst_mve_mux_start_movie (mvemux); gst_mve_mux_init_video_chunk (mvemux, palette); mvemux->chunk_has_palette = TRUE; if (mvemux->audio_pad_connected) { gst_mve_mux_init_audio_chunk (mvemux); mvemux->state = MVE_MUX_STATE_PREBUFFER; } else mvemux->state = MVE_MUX_STATE_MOVIE; } while ((mvemux->state == MVE_MUX_STATE_PREBUFFER) && (ret == GST_FLOW_OK) && gst_mve_mux_audio_data (mvemux)) { ret = gst_mve_mux_prebuffer_audio_chunk (mvemux); } if (G_LIKELY (mvemux->state >= MVE_MUX_STATE_MOVIE)) { audio_ok = !mvemux->audio_pad_connected || !g_queue_is_empty (mvemux->audio_buffer) || (mvemux->audio_pad_eos && (mvemux->stream_time <= mvemux->max_ts)); video_ok = !g_queue_is_empty (mvemux->video_buffer) || (mvemux->video_pad_eos && (!mvemux->audio_pad_eos || (mvemux->stream_time <= mvemux->max_ts))); while ((ret == GST_FLOW_OK) && audio_ok && video_ok) { if (!g_queue_is_empty (mvemux->video_buffer)) { if ((mvemux->bpp == 8) && !mvemux->chunk_has_palette) { ret = gst_mve_mux_palette_from_current_frame (mvemux, &palette); if (ret != GST_FLOW_OK) goto done; if (gst_mve_mux_palette_changed (mvemux, palette)) gst_mve_mux_init_video_chunk (mvemux, palette); mvemux->chunk_has_palette = TRUE; } } /* audio data */ if (mvemux->audio_pad_connected && !mvemux->chunk_has_audio && gst_mve_mux_audio_data (mvemux)) mvemux->chunk_has_audio = TRUE; if ((!g_queue_is_empty (mvemux->video_buffer) || mvemux->video_pad_eos) && (mvemux->chunk_has_audio || !mvemux->audio_pad_connected || mvemux->audio_pad_eos)) { ret = gst_mve_mux_push_chunk (mvemux); } audio_ok = !mvemux->audio_pad_connected || !g_queue_is_empty (mvemux->audio_buffer) || (mvemux->audio_pad_eos && (mvemux->stream_time <= mvemux->max_ts)); video_ok = !g_queue_is_empty (mvemux->video_buffer) || (mvemux->video_pad_eos && (!mvemux->audio_pad_eos || (mvemux->stream_time <= mvemux->max_ts))); } } if (G_UNLIKELY ((mvemux->state == MVE_MUX_STATE_EOS) && (ret == GST_FLOW_OK))) { ret = gst_mve_mux_end_movie (mvemux); gst_pad_push_event (mvemux->source, gst_event_new_eos ()); } done: g_mutex_unlock (mvemux->lock); return ret; } static gboolean gst_mve_mux_sink_event (GstPad * pad, GstEvent * event) { gboolean res = TRUE; GstMveMux *mvemux = GST_MVE_MUX (GST_PAD_PARENT (pad)); GST_DEBUG_OBJECT (mvemux, "got %s event for pad %s", GST_EVENT_TYPE_NAME (event), GST_PAD_NAME (pad)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_EOS: if (pad == mvemux->audiosink) { mvemux->audio_pad_eos = TRUE; if (mvemux->state == MVE_MUX_STATE_PREBUFFER) mvemux->state = MVE_MUX_STATE_MOVIE; } else if (pad == mvemux->videosink) mvemux->video_pad_eos = TRUE; /* TODO: this is evil */ if (mvemux->audio_pad_eos && mvemux->video_pad_eos) { mvemux->state = MVE_MUX_STATE_EOS; gst_mve_mux_chain (pad, NULL); } gst_event_unref (event); break; case GST_EVENT_NEWSEGMENT: if (pad == mvemux->audiosink) { GstFormat format; gint64 start; gboolean update; gst_event_parse_new_segment (event, &update, NULL, &format, &start, NULL, NULL); if ((format == GST_FORMAT_TIME) && update && (start > mvemux->max_ts)) mvemux->max_ts = start; } gst_event_unref (event); break; default: res = gst_pad_event_default (pad, event); break; } return res; } static gboolean gst_mve_mux_vidsink_set_caps (GstPad * pad, GstCaps * vscaps) { GstMveMux *mvemux; GstStructure *structure; GstClockTime duration; const GValue *fps; gint w, h, bpp; gboolean ret; mvemux = GST_MVE_MUX (GST_PAD_PARENT (pad)); GST_DEBUG_OBJECT (mvemux, "video set_caps triggered on %s", GST_PAD_NAME (pad)); structure = gst_caps_get_structure (vscaps, 0); ret = gst_structure_get_int (structure, "width", &w); ret &= gst_structure_get_int (structure, "height", &h); ret &= gst_structure_get_int (structure, "bpp", &bpp); fps = gst_structure_get_value (structure, "framerate"); ret &= (fps != NULL && GST_VALUE_HOLDS_FRACTION (fps)); duration = gst_util_uint64_scale_int (GST_SECOND, gst_value_get_fraction_denominator (fps), gst_value_get_fraction_numerator (fps)); if (!ret) return FALSE; /* don't allow changing width, height, bpp, or framerate */ if (mvemux->state != MVE_MUX_STATE_INITIAL) { if (mvemux->width != w || mvemux->height != h || mvemux->bpp != bpp || mvemux->frame_duration != duration) { GST_ERROR_OBJECT (mvemux, "caps renegotiation not allowed"); return FALSE; } } else { if (w % 8 != 0 || h % 8 != 0) { GST_ERROR_OBJECT (mvemux, "width and height must be multiples of 8"); return FALSE; } mvemux->width = w; mvemux->height = h; mvemux->bpp = bpp; mvemux->frame_duration = duration; if (mvemux->screen_width < w) { GST_INFO_OBJECT (mvemux, "setting suggested screen width to %d", w); mvemux->screen_width = w; } if (mvemux->screen_height < h) { GST_INFO_OBJECT (mvemux, "setting suggested screen height to %d", h); mvemux->screen_height = h; } g_free (mvemux->chunk_code_map); mvemux->chunk_code_map = g_malloc ((((w * h) >> 6) + 1) >> 1); /* audio caps already initialized? */ if (mvemux->bps != 0 || !mvemux->audio_pad_connected) mvemux->state = MVE_MUX_STATE_CONNECTED; } return TRUE; } static gboolean gst_mve_mux_audsink_set_caps (GstPad * pad, GstCaps * ascaps) { GstMveMux *mvemux; GstStructure *structure; gboolean ret; gint val; mvemux = GST_MVE_MUX (GST_PAD_PARENT (pad)); GST_DEBUG_OBJECT (mvemux, "audio set_caps triggered on %s", GST_PAD_NAME (pad)); /* don't allow caps renegotiation for now */ if (mvemux->state != MVE_MUX_STATE_INITIAL) return FALSE; structure = gst_caps_get_structure (ascaps, 0); ret = gst_structure_get_int (structure, "channels", &val); mvemux->channels = val; ret &= gst_structure_get_int (structure, "rate", &val); mvemux->rate = val; ret &= gst_structure_get_int (structure, "width", &val); mvemux->bps = val; /* video caps already initialized? */ if (mvemux->bpp != 0) mvemux->state = MVE_MUX_STATE_CONNECTED; return ret; } static GstPad * gst_mve_mux_request_new_pad (GstElement * element, GstPadTemplate * templ, const gchar * req_name) { GstMveMux *mvemux = GST_MVE_MUX (element); GstElementClass *klass = GST_ELEMENT_GET_CLASS (element); GstPad *pad; g_return_val_if_fail (templ != NULL, NULL); if (templ->direction != GST_PAD_SINK) { GST_WARNING_OBJECT (mvemux, "request pad is not a SINK pad"); return NULL; } if (templ == gst_element_class_get_pad_template (klass, "audio")) { if (mvemux->audiosink) return NULL; mvemux->audiosink = gst_pad_new_from_template (templ, "audio"); gst_pad_set_setcaps_function (mvemux->audiosink, GST_DEBUG_FUNCPTR (gst_mve_mux_audsink_set_caps)); mvemux->audio_pad_eos = FALSE; pad = mvemux->audiosink; } else if (templ == gst_element_class_get_pad_template (klass, "video")) { if (mvemux->videosink) return NULL; mvemux->videosink = gst_pad_new_from_template (templ, "video"); gst_pad_set_setcaps_function (mvemux->videosink, GST_DEBUG_FUNCPTR (gst_mve_mux_vidsink_set_caps)); mvemux->video_pad_eos = FALSE; pad = mvemux->videosink; } else { g_assert_not_reached (); } gst_pad_set_chain_function (pad, GST_DEBUG_FUNCPTR (gst_mve_mux_chain)); gst_pad_set_event_function (pad, GST_DEBUG_FUNCPTR (gst_mve_mux_sink_event)); g_signal_connect (pad, "linked", G_CALLBACK (gst_mve_mux_pad_link), mvemux); g_signal_connect (pad, "unlinked", G_CALLBACK (gst_mve_mux_pad_unlink), mvemux); gst_element_add_pad (element, pad); return pad; } static void gst_mve_mux_release_pad (GstElement * element, GstPad * pad) { GstMveMux *mvemux = GST_MVE_MUX (element); gst_element_remove_pad (element, pad); if (pad == mvemux->audiosink) { mvemux->audiosink = NULL; mvemux->audio_pad_connected = FALSE; } else if (pad == mvemux->videosink) { mvemux->videosink = NULL; mvemux->video_pad_connected = FALSE; } } static void gst_mve_mux_base_init (GstMveMuxClass * klass) { static const GstElementDetails gst_mve_mux_details = GST_ELEMENT_DETAILS ("MVE Multiplexer", "Codec/Muxer", "Muxes audio and video into an MVE stream", "Jens Granseuer "); GstElementClass *element_class = GST_ELEMENT_CLASS (klass); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&src_factory)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&audio_sink_factory)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&video_sink_factory)); gst_element_class_set_details (element_class, &gst_mve_mux_details); } static void gst_mve_mux_finalize (GObject * object) { GstMveMux *mvemux = GST_MVE_MUX (object); if (mvemux->lock) { g_mutex_free (mvemux->lock); mvemux->lock = NULL; } if (mvemux->audio_buffer) { g_queue_free (mvemux->audio_buffer); mvemux->audio_buffer = NULL; } if (mvemux->video_buffer) { g_queue_free (mvemux->video_buffer); mvemux->video_buffer = NULL; } G_OBJECT_CLASS (parent_class)->finalize (object); } static void gst_mve_mux_class_init (GstMveMuxClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = G_OBJECT_CLASS (klass); gstelement_class = GST_ELEMENT_CLASS (klass); parent_class = g_type_class_peek_parent (klass); gobject_class->finalize = gst_mve_mux_finalize; gobject_class->get_property = gst_mve_mux_get_property; gobject_class->set_property = gst_mve_mux_set_property; g_object_class_install_property (gobject_class, ARG_AUDIO_COMPRESSION, g_param_spec_boolean ("compression", "Audio compression", "Whether to compress audio data", MVE_MUX_DEFAULT_COMPRESSION, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, ARG_VIDEO_QUICK_ENCODING, g_param_spec_boolean ("quick", "Quick encoding", "Whether to disable expensive encoding operations", TRUE, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, ARG_VIDEO_SCREEN_WIDTH, g_param_spec_uint ("screen-width", "Screen width", "Suggested screen width", 320, 1600, MVE_MUX_DEFAULT_SCREEN_WIDTH, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, ARG_VIDEO_SCREEN_HEIGHT, g_param_spec_uint ("screen-height", "Screen height", "Suggested screen height", 200, 1200, MVE_MUX_DEFAULT_SCREEN_HEIGHT, G_PARAM_READWRITE)); gstelement_class->request_new_pad = gst_mve_mux_request_new_pad; gstelement_class->release_pad = gst_mve_mux_release_pad; gstelement_class->change_state = gst_mve_mux_change_state; } static void gst_mve_mux_init (GstMveMux * mvemux) { GstElementClass *klass = GST_ELEMENT_GET_CLASS (mvemux); mvemux->source = gst_pad_new_from_template (gst_element_class_get_pad_template (klass, "src"), "src"); gst_element_add_pad (GST_ELEMENT (mvemux), mvemux->source); mvemux->lock = g_mutex_new (); mvemux->audiosink = NULL; mvemux->videosink = NULL; mvemux->audio_pad_connected = FALSE; mvemux->video_pad_connected = FALSE; /* audio/video metadata initialisation */ mvemux->last_frame = NULL; mvemux->second_last_frame = NULL; mvemux->chunk_code_map = NULL; mvemux->chunk_video = NULL; mvemux->chunk_audio = NULL; mvemux->audio_buffer = NULL; mvemux->video_buffer = NULL; gst_mve_mux_reset (mvemux); } GType gst_mve_mux_get_type (void) { static GType mvemux_type = 0; if (!mvemux_type) { static const GTypeInfo mvemux_info = { sizeof (GstMveMuxClass), (GBaseInitFunc) gst_mve_mux_base_init, NULL, (GClassInitFunc) gst_mve_mux_class_init, NULL, NULL, sizeof (GstMveMux), 0, (GInstanceInitFunc) gst_mve_mux_init, }; GST_DEBUG_CATEGORY_INIT (mvemux_debug, "mvemux", 0, "Interplay MVE movie muxer"); mvemux_type = g_type_register_static (GST_TYPE_ELEMENT, "GstMveMux", &mvemux_info, 0); } return mvemux_type; }