| /* GStreamer |
| * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> |
| * <2005> Wim Taymans <wim@fluendo.com> |
| * |
| * 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. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <string.h> |
| #include <math.h> |
| |
| #include <gst/audio/audio.h> |
| #include "gstdvdemux.h" |
| #include "gstsmptetimecode.h" |
| |
| /** |
| * SECTION:element-dvdemux |
| * |
| * dvdemux splits raw DV into its audio and video components. The audio will be |
| * decoded raw samples and the video will be encoded DV video. |
| * |
| * This element can operate in both push and pull mode depending on the |
| * capabilities of the upstream peer. |
| * |
| * <refsect2> |
| * <title>Example launch line</title> |
| * |[ |
| * gst-launch-1.0 filesrc location=test.dv ! dvdemux name=demux ! queue ! audioconvert ! alsasink demux. ! queue ! dvdec ! xvimagesink |
| * ]| This pipeline decodes and renders the raw DV stream to an audio and a videosink. |
| * </refsect2> |
| */ |
| |
| /* DV output has two modes, normal and wide. The resolution is the same in both |
| * cases: 720 pixels wide by 576 pixels tall in PAL format, and 720x480 for |
| * NTSC. |
| * |
| * Each of the modes has its own pixel aspect ratio, which is fixed in practice |
| * by ITU-R BT.601 (also known as "CCIR-601" or "Rec.601"). Or so claims a |
| * reference that I culled from the reliable "internet", |
| * http://www.mir.com/DMG/aspect.html. Normal PAL is 59/54 and normal NTSC is |
| * 10/11. Because the pixel resolution is the same for both cases, we can get |
| * the pixel aspect ratio for wide recordings by multiplying by the ratio of |
| * display aspect ratios, 16/9 (for wide) divided by 4/3 (for normal): |
| * |
| * Wide NTSC: 10/11 * (16/9)/(4/3) = 40/33 |
| * Wide PAL: 59/54 * (16/9)/(4/3) = 118/81 |
| * |
| * However, the pixel resolution coming out of a DV source does not combine with |
| * the standard pixel aspect ratios to give a proper display aspect ratio. An |
| * image 480 pixels tall, with a 4:3 display aspect ratio, will be 768 pixels |
| * wide. But, if we take the normal PAL aspect ratio of 59/54, and multiply it |
| * with the width of the DV image (720 pixels), we get 786.666..., which is |
| * nonintegral and too wide. The camera is not outputting a 4:3 image. |
| * |
| * If the video sink for this stream has fixed dimensions (such as for |
| * fullscreen playback, or for a java applet in a web page), you then have two |
| * choices. Either you show the whole image, but pad the image with black |
| * borders on the top and bottom (like watching a widescreen video on a 4:3 |
| * device), or you crop the video to the proper ratio. Apparently the latter is |
| * the standard practice. |
| * |
| * For its part, GStreamer is concerned with accuracy and preservation of |
| * information. This element outputs the 720x576 or 720x480 video that it |
| * recieves, noting the proper aspect ratio. This should not be a problem for |
| * windowed applications, which can change size to fit the video. Applications |
| * with fixed size requirements should decide whether to crop or pad which |
| * an element such as videobox can do. |
| */ |
| |
| #define NTSC_HEIGHT 480 |
| #define NTSC_BUFFER 120000 |
| #define NTSC_FRAMERATE_NUMERATOR 30000 |
| #define NTSC_FRAMERATE_DENOMINATOR 1001 |
| |
| #define PAL_HEIGHT 576 |
| #define PAL_BUFFER 144000 |
| #define PAL_FRAMERATE_NUMERATOR 25 |
| #define PAL_FRAMERATE_DENOMINATOR 1 |
| |
| #define PAL_NORMAL_PAR_X 16 |
| #define PAL_NORMAL_PAR_Y 15 |
| #define PAL_WIDE_PAR_X 64 |
| #define PAL_WIDE_PAR_Y 45 |
| |
| #define NTSC_NORMAL_PAR_X 8 |
| #define NTSC_NORMAL_PAR_Y 9 |
| #define NTSC_WIDE_PAR_X 32 |
| #define NTSC_WIDE_PAR_Y 27 |
| |
| GST_DEBUG_CATEGORY_STATIC (dvdemux_debug); |
| #define GST_CAT_DEFAULT dvdemux_debug |
| |
| static GstStaticPadTemplate sink_temp = GST_STATIC_PAD_TEMPLATE ("sink", |
| GST_PAD_SINK, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) true") |
| ); |
| |
| static GstStaticPadTemplate video_src_temp = GST_STATIC_PAD_TEMPLATE ("video", |
| GST_PAD_SRC, |
| GST_PAD_SOMETIMES, |
| GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) false") |
| ); |
| |
| static GstStaticPadTemplate audio_src_temp = GST_STATIC_PAD_TEMPLATE ("audio", |
| GST_PAD_SRC, |
| GST_PAD_SOMETIMES, |
| GST_STATIC_CAPS ("audio/x-raw, " |
| "format = (string) " GST_AUDIO_NE (S16) ", " |
| "layout = (string) interleaved, " |
| "rate = (int) { 32000, 44100, 48000 }, " "channels = (int) {2, 4}") |
| ); |
| |
| |
| #define gst_dvdemux_parent_class parent_class |
| G_DEFINE_TYPE (GstDVDemux, gst_dvdemux, GST_TYPE_ELEMENT); |
| |
| static void gst_dvdemux_finalize (GObject * object); |
| |
| /* query functions */ |
| static gboolean gst_dvdemux_src_query (GstPad * pad, GstObject * parent, |
| GstQuery * query); |
| static gboolean gst_dvdemux_sink_query (GstPad * pad, GstObject * parent, |
| GstQuery * query); |
| |
| /* convert functions */ |
| static gboolean gst_dvdemux_sink_convert (GstDVDemux * demux, |
| GstFormat src_format, gint64 src_value, GstFormat dest_format, |
| gint64 * dest_value); |
| static gboolean gst_dvdemux_src_convert (GstDVDemux * demux, GstPad * pad, |
| GstFormat src_format, gint64 src_value, GstFormat dest_format, |
| gint64 * dest_value); |
| |
| /* event functions */ |
| static gboolean gst_dvdemux_send_event (GstElement * element, GstEvent * event); |
| static gboolean gst_dvdemux_handle_src_event (GstPad * pad, GstObject * parent, |
| GstEvent * event); |
| static gboolean gst_dvdemux_handle_sink_event (GstPad * pad, GstObject * parent, |
| GstEvent * event); |
| |
| /* scheduling functions */ |
| static void gst_dvdemux_loop (GstPad * pad); |
| static GstFlowReturn gst_dvdemux_flush (GstDVDemux * dvdemux); |
| static GstFlowReturn gst_dvdemux_chain (GstPad * pad, GstObject * parent, |
| GstBuffer * buffer); |
| |
| /* state change functions */ |
| static gboolean gst_dvdemux_sink_activate (GstPad * sinkpad, |
| GstObject * parent); |
| static gboolean gst_dvdemux_sink_activate_mode (GstPad * sinkpad, |
| GstObject * parent, GstPadMode mode, gboolean active); |
| static GstStateChangeReturn gst_dvdemux_change_state (GstElement * element, |
| GstStateChange transition); |
| |
| static void |
| gst_dvdemux_class_init (GstDVDemuxClass * klass) |
| { |
| GObjectClass *gobject_class; |
| GstElementClass *gstelement_class; |
| |
| gobject_class = (GObjectClass *) klass; |
| gstelement_class = (GstElementClass *) klass; |
| |
| gobject_class->finalize = gst_dvdemux_finalize; |
| |
| gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_dvdemux_change_state); |
| gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_dvdemux_send_event); |
| |
| gst_element_class_add_static_pad_template (gstelement_class, &sink_temp); |
| gst_element_class_add_static_pad_template (gstelement_class, &video_src_temp); |
| gst_element_class_add_static_pad_template (gstelement_class, &audio_src_temp); |
| |
| gst_element_class_set_static_metadata (gstelement_class, |
| "DV system stream demuxer", "Codec/Demuxer", |
| "Uses libdv to separate DV audio from DV video (libdv.sourceforge.net)", |
| "Erik Walthinsen <omega@cse.ogi.edu>, Wim Taymans <wim@fluendo.com>"); |
| |
| GST_DEBUG_CATEGORY_INIT (dvdemux_debug, "dvdemux", 0, "DV demuxer element"); |
| } |
| |
| static void |
| gst_dvdemux_init (GstDVDemux * dvdemux) |
| { |
| gint i; |
| |
| dvdemux->sinkpad = gst_pad_new_from_static_template (&sink_temp, "sink"); |
| /* we can operate in pull and push mode so we install |
| * a custom activate function */ |
| gst_pad_set_activate_function (dvdemux->sinkpad, |
| GST_DEBUG_FUNCPTR (gst_dvdemux_sink_activate)); |
| /* the function to activate in push mode */ |
| gst_pad_set_activatemode_function (dvdemux->sinkpad, |
| GST_DEBUG_FUNCPTR (gst_dvdemux_sink_activate_mode)); |
| /* for push mode, this is the chain function */ |
| gst_pad_set_chain_function (dvdemux->sinkpad, |
| GST_DEBUG_FUNCPTR (gst_dvdemux_chain)); |
| /* handling events (in push mode only) */ |
| gst_pad_set_event_function (dvdemux->sinkpad, |
| GST_DEBUG_FUNCPTR (gst_dvdemux_handle_sink_event)); |
| /* query functions */ |
| gst_pad_set_query_function (dvdemux->sinkpad, |
| GST_DEBUG_FUNCPTR (gst_dvdemux_sink_query)); |
| |
| /* now add the pad */ |
| gst_element_add_pad (GST_ELEMENT (dvdemux), dvdemux->sinkpad); |
| |
| dvdemux->adapter = gst_adapter_new (); |
| |
| /* we need 4 temp buffers for audio decoding which are of a static |
| * size and which we can allocate here */ |
| for (i = 0; i < 4; i++) { |
| dvdemux->audio_buffers[i] = |
| (gint16 *) g_malloc (DV_AUDIO_MAX_SAMPLES * sizeof (gint16)); |
| } |
| } |
| |
| static void |
| gst_dvdemux_finalize (GObject * object) |
| { |
| GstDVDemux *dvdemux; |
| gint i; |
| |
| dvdemux = GST_DVDEMUX (object); |
| |
| g_object_unref (dvdemux->adapter); |
| |
| /* clean up temp audio buffers */ |
| for (i = 0; i < 4; i++) { |
| g_free (dvdemux->audio_buffers[i]); |
| } |
| |
| G_OBJECT_CLASS (parent_class)->finalize (object); |
| } |
| |
| /* reset to default values before starting streaming */ |
| static void |
| gst_dvdemux_reset (GstDVDemux * dvdemux) |
| { |
| dvdemux->frame_offset = 0; |
| dvdemux->audio_offset = 0; |
| dvdemux->video_offset = 0; |
| dvdemux->discont = TRUE; |
| g_atomic_int_set (&dvdemux->found_header, 0); |
| dvdemux->frame_len = -1; |
| dvdemux->need_segment = FALSE; |
| dvdemux->new_media = FALSE; |
| dvdemux->framerate_numerator = 0; |
| dvdemux->framerate_denominator = 0; |
| dvdemux->height = 0; |
| dvdemux->frequency = 0; |
| dvdemux->channels = 0; |
| dvdemux->wide = FALSE; |
| gst_segment_init (&dvdemux->byte_segment, GST_FORMAT_BYTES); |
| gst_segment_init (&dvdemux->time_segment, GST_FORMAT_TIME); |
| dvdemux->segment_seqnum = 0; |
| dvdemux->upstream_time_segment = FALSE; |
| dvdemux->have_group_id = FALSE; |
| dvdemux->group_id = G_MAXUINT; |
| } |
| |
| static gboolean |
| have_group_id (GstDVDemux * demux) |
| { |
| GstEvent *event; |
| |
| event = gst_pad_get_sticky_event (demux->sinkpad, GST_EVENT_STREAM_START, 0); |
| if (event) { |
| if (gst_event_parse_group_id (event, &demux->group_id)) |
| demux->have_group_id = TRUE; |
| else |
| demux->have_group_id = FALSE; |
| gst_event_unref (event); |
| } else if (!demux->have_group_id) { |
| demux->have_group_id = TRUE; |
| demux->group_id = gst_util_group_id_next (); |
| } |
| |
| return demux->have_group_id; |
| } |
| |
| static GstPad * |
| gst_dvdemux_add_pad (GstDVDemux * dvdemux, GstStaticPadTemplate * template, |
| GstCaps * caps) |
| { |
| gboolean no_more_pads; |
| GstPad *pad; |
| GstEvent *event; |
| gchar *stream_id; |
| gchar rec_datetime[40]; |
| GstDateTime *rec_dt; |
| |
| pad = gst_pad_new_from_static_template (template, template->name_template); |
| |
| gst_pad_set_query_function (pad, GST_DEBUG_FUNCPTR (gst_dvdemux_src_query)); |
| |
| gst_pad_set_event_function (pad, |
| GST_DEBUG_FUNCPTR (gst_dvdemux_handle_src_event)); |
| gst_pad_use_fixed_caps (pad); |
| gst_pad_set_active (pad, TRUE); |
| |
| stream_id = |
| gst_pad_create_stream_id (pad, |
| GST_ELEMENT_CAST (dvdemux), |
| template == &video_src_temp ? "video" : "audio"); |
| event = gst_event_new_stream_start (stream_id); |
| if (have_group_id (dvdemux)) |
| gst_event_set_group_id (event, dvdemux->group_id); |
| gst_pad_push_event (pad, event); |
| g_free (stream_id); |
| |
| gst_pad_set_caps (pad, caps); |
| |
| gst_pad_push_event (pad, gst_event_new_segment (&dvdemux->time_segment)); |
| |
| gst_element_add_pad (GST_ELEMENT (dvdemux), pad); |
| |
| no_more_pads = |
| (dvdemux->videosrcpad != NULL && template == &audio_src_temp) || |
| (dvdemux->audiosrcpad != NULL && template == &video_src_temp); |
| |
| if (no_more_pads) |
| gst_element_no_more_pads (GST_ELEMENT (dvdemux)); |
| |
| if (no_more_pads) { |
| GstTagList *tags; |
| |
| tags = gst_tag_list_new (GST_TAG_CONTAINER_FORMAT, "DV", NULL); |
| gst_tag_list_set_scope (tags, GST_TAG_SCOPE_GLOBAL); |
| |
| if (dv_get_recording_datetime (dvdemux->decoder, rec_datetime)) { |
| rec_dt = gst_date_time_new_from_iso8601_string (rec_datetime); |
| if (rec_dt) { |
| gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE, GST_TAG_DATE_TIME, |
| rec_dt, NULL); |
| gst_date_time_unref (rec_dt); |
| } |
| } |
| |
| if (dvdemux->videosrcpad) |
| gst_pad_push_event (dvdemux->videosrcpad, |
| gst_event_new_tag (gst_tag_list_ref (tags))); |
| if (dvdemux->audiosrcpad) |
| gst_pad_push_event (dvdemux->audiosrcpad, |
| gst_event_new_tag (gst_tag_list_ref (tags))); |
| gst_tag_list_unref (tags); |
| } |
| |
| return pad; |
| } |
| |
| static void |
| gst_dvdemux_remove_pads (GstDVDemux * dvdemux) |
| { |
| if (dvdemux->videosrcpad) { |
| gst_element_remove_pad (GST_ELEMENT (dvdemux), dvdemux->videosrcpad); |
| dvdemux->videosrcpad = NULL; |
| } |
| if (dvdemux->audiosrcpad) { |
| gst_element_remove_pad (GST_ELEMENT (dvdemux), dvdemux->audiosrcpad); |
| dvdemux->audiosrcpad = NULL; |
| } |
| } |
| |
| static gboolean |
| gst_dvdemux_src_convert (GstDVDemux * dvdemux, GstPad * pad, |
| GstFormat src_format, gint64 src_value, GstFormat dest_format, |
| gint64 * dest_value) |
| { |
| gboolean res = TRUE; |
| |
| if (dest_format == src_format || src_value == -1) { |
| *dest_value = src_value; |
| goto done; |
| } |
| |
| if (dvdemux->frame_len <= 0) |
| goto error; |
| |
| if (dvdemux->decoder == NULL) |
| goto error; |
| |
| GST_INFO_OBJECT (pad, |
| "src_value:%" G_GINT64_FORMAT ", src_format:%d, dest_format:%d", |
| src_value, src_format, dest_format); |
| |
| switch (src_format) { |
| case GST_FORMAT_BYTES: |
| switch (dest_format) { |
| case GST_FORMAT_DEFAULT: |
| if (pad == dvdemux->videosrcpad) |
| *dest_value = src_value / dvdemux->frame_len; |
| else if (pad == dvdemux->audiosrcpad) |
| *dest_value = src_value / (2 * dvdemux->channels); |
| break; |
| case GST_FORMAT_TIME: |
| if (pad == dvdemux->videosrcpad) |
| *dest_value = gst_util_uint64_scale (src_value, |
| GST_SECOND * dvdemux->framerate_denominator, |
| dvdemux->frame_len * dvdemux->framerate_numerator); |
| else if (pad == dvdemux->audiosrcpad) |
| *dest_value = gst_util_uint64_scale_int (src_value, GST_SECOND, |
| 2 * dvdemux->frequency * dvdemux->channels); |
| break; |
| default: |
| res = FALSE; |
| } |
| break; |
| case GST_FORMAT_TIME: |
| switch (dest_format) { |
| case GST_FORMAT_BYTES: |
| if (pad == dvdemux->videosrcpad) |
| *dest_value = gst_util_uint64_scale (src_value, |
| dvdemux->frame_len * dvdemux->framerate_numerator, |
| dvdemux->framerate_denominator * GST_SECOND); |
| else if (pad == dvdemux->audiosrcpad) |
| *dest_value = gst_util_uint64_scale_int (src_value, |
| 2 * dvdemux->frequency * dvdemux->channels, GST_SECOND); |
| break; |
| case GST_FORMAT_DEFAULT: |
| if (pad == dvdemux->videosrcpad) { |
| if (src_value) |
| *dest_value = gst_util_uint64_scale (src_value, |
| dvdemux->framerate_numerator, |
| dvdemux->framerate_denominator * GST_SECOND); |
| else |
| *dest_value = 0; |
| } else if (pad == dvdemux->audiosrcpad) { |
| *dest_value = gst_util_uint64_scale (src_value, |
| dvdemux->frequency, GST_SECOND); |
| } |
| break; |
| default: |
| res = FALSE; |
| } |
| break; |
| case GST_FORMAT_DEFAULT: |
| switch (dest_format) { |
| case GST_FORMAT_TIME: |
| if (pad == dvdemux->videosrcpad) { |
| *dest_value = gst_util_uint64_scale (src_value, |
| GST_SECOND * dvdemux->framerate_denominator, |
| dvdemux->framerate_numerator); |
| } else if (pad == dvdemux->audiosrcpad) { |
| if (src_value) |
| *dest_value = gst_util_uint64_scale (src_value, |
| GST_SECOND, dvdemux->frequency); |
| else |
| *dest_value = 0; |
| } |
| break; |
| case GST_FORMAT_BYTES: |
| if (pad == dvdemux->videosrcpad) { |
| *dest_value = src_value * dvdemux->frame_len; |
| } else if (pad == dvdemux->audiosrcpad) { |
| *dest_value = src_value * 2 * dvdemux->channels; |
| } |
| break; |
| default: |
| res = FALSE; |
| } |
| break; |
| default: |
| res = FALSE; |
| } |
| |
| done: |
| GST_INFO_OBJECT (pad, |
| "Result : dest_format:%d, dest_value:%" G_GINT64_FORMAT ", res:%d", |
| dest_format, *dest_value, res); |
| return res; |
| |
| /* ERRORS */ |
| error: |
| { |
| GST_INFO ("source conversion failed"); |
| return FALSE; |
| } |
| } |
| |
| static gboolean |
| gst_dvdemux_sink_convert (GstDVDemux * dvdemux, GstFormat src_format, |
| gint64 src_value, GstFormat dest_format, gint64 * dest_value) |
| { |
| gboolean res = TRUE; |
| |
| GST_DEBUG_OBJECT (dvdemux, "%d -> %d", src_format, dest_format); |
| GST_INFO_OBJECT (dvdemux, |
| "src_value:%" G_GINT64_FORMAT ", src_format:%d, dest_format:%d", |
| src_value, src_format, dest_format); |
| |
| if (dest_format == src_format || src_value == -1) { |
| *dest_value = src_value; |
| goto done; |
| } |
| |
| if (dvdemux->frame_len <= 0) |
| goto error; |
| |
| switch (src_format) { |
| case GST_FORMAT_BYTES: |
| switch (dest_format) { |
| case GST_FORMAT_TIME: |
| { |
| guint64 frame; |
| |
| /* get frame number, rounds down so don't combine this |
| * line and the next line. */ |
| frame = src_value / dvdemux->frame_len; |
| |
| *dest_value = gst_util_uint64_scale (frame, |
| GST_SECOND * dvdemux->framerate_denominator, |
| dvdemux->framerate_numerator); |
| break; |
| } |
| default: |
| res = FALSE; |
| } |
| break; |
| case GST_FORMAT_TIME: |
| switch (dest_format) { |
| case GST_FORMAT_BYTES: |
| { |
| guint64 frame; |
| |
| /* calculate the frame */ |
| frame = |
| gst_util_uint64_scale (src_value, dvdemux->framerate_numerator, |
| dvdemux->framerate_denominator * GST_SECOND); |
| |
| /* calculate the offset from the rounded frame */ |
| *dest_value = frame * dvdemux->frame_len; |
| break; |
| } |
| default: |
| res = FALSE; |
| } |
| break; |
| default: |
| res = FALSE; |
| } |
| GST_INFO_OBJECT (dvdemux, |
| "Result : dest_format:%d, dest_value:%" G_GINT64_FORMAT ", res:%d", |
| dest_format, *dest_value, res); |
| |
| done: |
| return res; |
| |
| error: |
| { |
| GST_INFO_OBJECT (dvdemux, "sink conversion failed"); |
| return FALSE; |
| } |
| } |
| |
| static gboolean |
| gst_dvdemux_src_query (GstPad * pad, GstObject * parent, GstQuery * query) |
| { |
| gboolean res = TRUE; |
| GstDVDemux *dvdemux; |
| |
| dvdemux = GST_DVDEMUX (parent); |
| |
| switch (GST_QUERY_TYPE (query)) { |
| case GST_QUERY_POSITION: |
| { |
| GstFormat format; |
| gint64 cur; |
| |
| /* get target format */ |
| gst_query_parse_position (query, &format, NULL); |
| |
| /* bring the position to the requested format. */ |
| if (!(res = gst_dvdemux_src_convert (dvdemux, pad, |
| GST_FORMAT_TIME, dvdemux->time_segment.position, |
| format, &cur))) |
| goto error; |
| gst_query_set_position (query, format, cur); |
| break; |
| } |
| case GST_QUERY_DURATION: |
| { |
| GstFormat format; |
| gint64 end; |
| GstQuery *pquery; |
| |
| /* First ask the peer in the original format */ |
| if (!gst_pad_peer_query (dvdemux->sinkpad, query)) { |
| /* get target format */ |
| gst_query_parse_duration (query, &format, NULL); |
| |
| /* Now ask the peer in BYTES format and try to convert */ |
| pquery = gst_query_new_duration (GST_FORMAT_BYTES); |
| if (!gst_pad_peer_query (dvdemux->sinkpad, pquery)) { |
| gst_query_unref (pquery); |
| goto error; |
| } |
| |
| /* get peer total length */ |
| gst_query_parse_duration (pquery, NULL, &end); |
| gst_query_unref (pquery); |
| |
| /* convert end to requested format */ |
| if (end != -1) { |
| if (!(res = gst_dvdemux_sink_convert (dvdemux, |
| GST_FORMAT_BYTES, end, format, &end))) { |
| goto error; |
| } |
| gst_query_set_duration (query, format, end); |
| } |
| } |
| break; |
| } |
| case GST_QUERY_CONVERT: |
| { |
| GstFormat src_fmt, dest_fmt; |
| gint64 src_val, dest_val; |
| |
| gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val); |
| if (!(res = |
| gst_dvdemux_src_convert (dvdemux, pad, src_fmt, src_val, |
| dest_fmt, &dest_val))) |
| goto error; |
| gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val); |
| break; |
| } |
| case GST_QUERY_SEEKING: |
| { |
| GstFormat fmt; |
| GstQuery *peerquery; |
| gboolean seekable; |
| |
| gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL); |
| |
| /* We can only handle TIME seeks really */ |
| if (fmt != GST_FORMAT_TIME) { |
| gst_query_set_seeking (query, fmt, FALSE, -1, -1); |
| break; |
| } |
| |
| /* First ask upstream */ |
| if (gst_pad_peer_query (dvdemux->sinkpad, query)) { |
| gst_query_parse_seeking (query, NULL, &seekable, NULL, NULL); |
| if (seekable) { |
| res = TRUE; |
| break; |
| } |
| } |
| |
| res = TRUE; |
| |
| peerquery = gst_query_new_seeking (GST_FORMAT_BYTES); |
| seekable = gst_pad_peer_query (dvdemux->sinkpad, peerquery); |
| |
| if (seekable) |
| gst_query_parse_seeking (peerquery, NULL, &seekable, NULL, NULL); |
| gst_query_unref (peerquery); |
| |
| if (seekable) { |
| peerquery = gst_query_new_duration (GST_FORMAT_TIME); |
| seekable = gst_dvdemux_src_query (pad, parent, peerquery); |
| |
| if (seekable) { |
| gint64 duration; |
| |
| gst_query_parse_duration (peerquery, NULL, &duration); |
| gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration); |
| } else { |
| gst_query_set_seeking (query, GST_FORMAT_TIME, FALSE, -1, -1); |
| } |
| |
| gst_query_unref (peerquery); |
| } else { |
| gst_query_set_seeking (query, GST_FORMAT_TIME, FALSE, -1, -1); |
| } |
| break; |
| } |
| default: |
| res = gst_pad_query_default (pad, parent, query); |
| break; |
| } |
| |
| return res; |
| |
| /* ERRORS */ |
| error: |
| { |
| GST_DEBUG ("error source query"); |
| return FALSE; |
| } |
| } |
| |
| static gboolean |
| gst_dvdemux_sink_query (GstPad * pad, GstObject * parent, GstQuery * query) |
| { |
| gboolean res = TRUE; |
| GstDVDemux *dvdemux; |
| |
| dvdemux = GST_DVDEMUX (parent); |
| |
| switch (GST_QUERY_TYPE (query)) { |
| case GST_QUERY_CONVERT: |
| { |
| GstFormat src_fmt, dest_fmt; |
| gint64 src_val, dest_val; |
| |
| gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val); |
| if (!(res = |
| gst_dvdemux_sink_convert (dvdemux, src_fmt, src_val, dest_fmt, |
| &dest_val))) |
| goto error; |
| gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val); |
| break; |
| } |
| default: |
| res = gst_pad_query_default (pad, parent, query); |
| break; |
| } |
| |
| return res; |
| |
| /* ERRORS */ |
| error: |
| { |
| GST_DEBUG ("error handling sink query"); |
| return FALSE; |
| } |
| } |
| |
| /* takes ownership of the event */ |
| static gboolean |
| gst_dvdemux_push_event (GstDVDemux * dvdemux, GstEvent * event) |
| { |
| gboolean res = FALSE; |
| |
| if (dvdemux->videosrcpad) { |
| gst_event_ref (event); |
| res |= gst_pad_push_event (dvdemux->videosrcpad, event); |
| } |
| |
| if (dvdemux->audiosrcpad) |
| res |= gst_pad_push_event (dvdemux->audiosrcpad, event); |
| else { |
| gst_event_unref (event); |
| res = TRUE; |
| } |
| |
| return res; |
| } |
| |
| static gboolean |
| gst_dvdemux_handle_sink_event (GstPad * pad, GstObject * parent, |
| GstEvent * event) |
| { |
| GstDVDemux *dvdemux = GST_DVDEMUX (parent); |
| gboolean res = TRUE; |
| |
| switch (GST_EVENT_TYPE (event)) { |
| case GST_EVENT_FLUSH_START: |
| /* we are not blocking on anything exect the push() calls |
| * to the peer which will be unblocked by forwarding the |
| * event.*/ |
| res = gst_dvdemux_push_event (dvdemux, event); |
| break; |
| case GST_EVENT_FLUSH_STOP: |
| gst_adapter_clear (dvdemux->adapter); |
| GST_DEBUG ("cleared adapter"); |
| gst_segment_init (&dvdemux->byte_segment, GST_FORMAT_BYTES); |
| gst_segment_init (&dvdemux->time_segment, GST_FORMAT_TIME); |
| dvdemux->discont = TRUE; |
| res = gst_dvdemux_push_event (dvdemux, event); |
| break; |
| case GST_EVENT_SEGMENT: |
| { |
| const GstSegment *segment; |
| |
| gst_event_parse_segment (event, &segment); |
| switch (segment->format) { |
| case GST_FORMAT_BYTES: |
| gst_segment_copy_into (segment, &dvdemux->byte_segment); |
| dvdemux->need_segment = TRUE; |
| dvdemux->segment_seqnum = gst_event_get_seqnum (event); |
| gst_event_unref (event); |
| break; |
| case GST_FORMAT_TIME: |
| gst_segment_copy_into (segment, &dvdemux->time_segment); |
| |
| dvdemux->upstream_time_segment = TRUE; |
| dvdemux->segment_seqnum = gst_event_get_seqnum (event); |
| |
| /* and we can just forward this time event */ |
| res = gst_dvdemux_push_event (dvdemux, event); |
| break; |
| default: |
| gst_event_unref (event); |
| /* cannot accept this format */ |
| res = FALSE; |
| break; |
| } |
| break; |
| } |
| case GST_EVENT_EOS: |
| /* flush any pending data, should be nothing left. */ |
| gst_dvdemux_flush (dvdemux); |
| /* forward event */ |
| res = gst_dvdemux_push_event (dvdemux, event); |
| /* and clear the adapter */ |
| gst_adapter_clear (dvdemux->adapter); |
| break; |
| case GST_EVENT_CAPS: |
| gst_event_unref (event); |
| break; |
| default: |
| res = gst_dvdemux_push_event (dvdemux, event); |
| break; |
| } |
| |
| return res; |
| } |
| |
| /* convert a pair of values on the given srcpad */ |
| static gboolean |
| gst_dvdemux_convert_src_pair (GstDVDemux * dvdemux, GstPad * pad, |
| GstFormat src_format, gint64 src_start, gint64 src_stop, |
| GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop) |
| { |
| gboolean res; |
| |
| GST_INFO ("starting conversion of start"); |
| /* bring the format to time on srcpad. */ |
| if (!(res = gst_dvdemux_src_convert (dvdemux, pad, |
| src_format, src_start, dst_format, dst_start))) { |
| goto done; |
| } |
| GST_INFO ("Finished conversion of start: %" G_GINT64_FORMAT, *dst_start); |
| |
| GST_INFO ("starting conversion of stop"); |
| /* bring the format to time on srcpad. */ |
| if (!(res = gst_dvdemux_src_convert (dvdemux, pad, |
| src_format, src_stop, dst_format, dst_stop))) { |
| /* could not convert seek format to time offset */ |
| goto done; |
| } |
| GST_INFO ("Finished conversion of stop: %" G_GINT64_FORMAT, *dst_stop); |
| done: |
| return res; |
| } |
| |
| /* convert a pair of values on the sinkpad */ |
| static gboolean |
| gst_dvdemux_convert_sink_pair (GstDVDemux * dvdemux, |
| GstFormat src_format, gint64 src_start, gint64 src_stop, |
| GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop) |
| { |
| gboolean res; |
| |
| GST_INFO ("starting conversion of start"); |
| /* bring the format to time on srcpad. */ |
| if (!(res = gst_dvdemux_sink_convert (dvdemux, |
| src_format, src_start, dst_format, dst_start))) { |
| goto done; |
| } |
| GST_INFO ("Finished conversion of start: %" G_GINT64_FORMAT, *dst_start); |
| |
| GST_INFO ("starting conversion of stop"); |
| /* bring the format to time on srcpad. */ |
| if (!(res = gst_dvdemux_sink_convert (dvdemux, |
| src_format, src_stop, dst_format, dst_stop))) { |
| /* could not convert seek format to time offset */ |
| goto done; |
| } |
| GST_INFO ("Finished conversion of stop: %" G_GINT64_FORMAT, *dst_stop); |
| done: |
| return res; |
| } |
| |
| /* convert a pair of values on the srcpad to a pair of |
| * values on the sinkpad |
| */ |
| static gboolean |
| gst_dvdemux_convert_src_to_sink (GstDVDemux * dvdemux, GstPad * pad, |
| GstFormat src_format, gint64 src_start, gint64 src_stop, |
| GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop) |
| { |
| GstFormat conv; |
| gboolean res; |
| |
| conv = GST_FORMAT_TIME; |
| /* convert to TIME intermediate format */ |
| if (!(res = gst_dvdemux_convert_src_pair (dvdemux, pad, |
| src_format, src_start, src_stop, conv, dst_start, dst_stop))) { |
| /* could not convert format to time offset */ |
| goto done; |
| } |
| /* convert to dst format on sinkpad */ |
| if (!(res = gst_dvdemux_convert_sink_pair (dvdemux, |
| conv, *dst_start, *dst_stop, dst_format, dst_start, dst_stop))) { |
| /* could not convert format to time offset */ |
| goto done; |
| } |
| done: |
| return res; |
| } |
| |
| #if 0 |
| static gboolean |
| gst_dvdemux_convert_segment (GstDVDemux * dvdemux, GstSegment * src, |
| GstSegment * dest) |
| { |
| dest->rate = src->rate; |
| dest->abs_rate = src->abs_rate; |
| dest->flags = src->flags; |
| |
| return TRUE; |
| } |
| #endif |
| |
| /* handle seek in push base mode. |
| * |
| * Convert the time seek to a bytes seek and send it |
| * upstream |
| * Does not take ownership of the event. |
| */ |
| static gboolean |
| gst_dvdemux_handle_push_seek (GstDVDemux * dvdemux, GstPad * pad, |
| GstEvent * event) |
| { |
| gboolean res = FALSE; |
| gdouble rate; |
| GstSeekFlags flags; |
| GstFormat format; |
| GstSeekType cur_type, stop_type; |
| gint64 cur, stop; |
| gint64 start_position, end_position; |
| GstEvent *newevent; |
| |
| gst_event_parse_seek (event, &rate, &format, &flags, |
| &cur_type, &cur, &stop_type, &stop); |
| |
| /* First try if upstream can handle time based seeks */ |
| if (format == GST_FORMAT_TIME) |
| res = gst_pad_push_event (dvdemux->sinkpad, gst_event_ref (event)); |
| |
| if (!res) { |
| /* we convert the start/stop on the srcpad to the byte format |
| * on the sinkpad and forward the event */ |
| res = gst_dvdemux_convert_src_to_sink (dvdemux, pad, |
| format, cur, stop, GST_FORMAT_BYTES, &start_position, &end_position); |
| if (!res) |
| goto done; |
| |
| /* now this is the updated seek event on bytes */ |
| newevent = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags, |
| cur_type, start_position, stop_type, end_position); |
| gst_event_set_seqnum (newevent, gst_event_get_seqnum (event)); |
| |
| res = gst_pad_push_event (dvdemux->sinkpad, newevent); |
| } |
| done: |
| return res; |
| } |
| |
| static void |
| gst_dvdemux_update_frame_offsets (GstDVDemux * dvdemux, GstClockTime timestamp) |
| { |
| /* calculate current frame number */ |
| gst_dvdemux_src_convert (dvdemux, dvdemux->videosrcpad, |
| dvdemux->time_segment.format, timestamp, |
| GST_FORMAT_DEFAULT, &dvdemux->video_offset); |
| |
| /* calculate current audio number */ |
| gst_dvdemux_src_convert (dvdemux, dvdemux->audiosrcpad, |
| dvdemux->time_segment.format, timestamp, |
| GST_FORMAT_DEFAULT, &dvdemux->audio_offset); |
| |
| /* every DV frame corresponts with one video frame */ |
| dvdemux->frame_offset = dvdemux->video_offset; |
| } |
| |
| /* position ourselves to the configured segment, used in pull mode. |
| * The input segment is in TIME format. We convert the time values |
| * to bytes values into our byte_segment which we use to pull data from |
| * the sinkpad peer. |
| */ |
| static gboolean |
| gst_dvdemux_do_seek (GstDVDemux * demux, GstSegment * segment) |
| { |
| gboolean res; |
| GstFormat format; |
| |
| /* position to value configured is last_stop, this will round down |
| * to the byte position where the frame containing the given |
| * timestamp can be found. */ |
| format = GST_FORMAT_BYTES; |
| res = gst_dvdemux_sink_convert (demux, |
| segment->format, segment->position, |
| format, (gint64 *) & demux->byte_segment.position); |
| if (!res) |
| goto done; |
| |
| /* update byte segment start */ |
| gst_dvdemux_sink_convert (demux, |
| segment->format, segment->start, format, |
| (gint64 *) & demux->byte_segment.start); |
| |
| /* update byte segment stop */ |
| gst_dvdemux_sink_convert (demux, |
| segment->format, segment->stop, format, |
| (gint64 *) & demux->byte_segment.stop); |
| |
| /* update byte segment time */ |
| gst_dvdemux_sink_convert (demux, |
| segment->format, segment->time, format, |
| (gint64 *) & demux->byte_segment.time); |
| |
| gst_dvdemux_update_frame_offsets (demux, segment->start); |
| |
| demux->discont = TRUE; |
| |
| done: |
| return res; |
| } |
| |
| /* handle seek in pull base mode. |
| * |
| * Does not take ownership of the event. |
| */ |
| static gboolean |
| gst_dvdemux_handle_pull_seek (GstDVDemux * demux, GstPad * pad, |
| GstEvent * event) |
| { |
| gboolean res; |
| gdouble rate; |
| GstFormat format; |
| GstSeekFlags flags; |
| GstSeekType cur_type, stop_type; |
| gint64 cur, stop; |
| gboolean flush; |
| gboolean update; |
| GstSegment seeksegment; |
| GstEvent *new_event; |
| |
| GST_DEBUG_OBJECT (demux, "doing seek"); |
| |
| /* first bring the event format to TIME, our native format |
| * to perform the seek on */ |
| if (event) { |
| GstFormat conv; |
| |
| gst_event_parse_seek (event, &rate, &format, &flags, |
| &cur_type, &cur, &stop_type, &stop); |
| |
| /* can't seek backwards yet */ |
| if (rate <= 0.0) |
| goto wrong_rate; |
| |
| /* convert input format to TIME */ |
| conv = GST_FORMAT_TIME; |
| if (!(gst_dvdemux_convert_src_pair (demux, pad, |
| format, cur, stop, conv, &cur, &stop))) |
| goto no_format; |
| |
| format = GST_FORMAT_TIME; |
| } else { |
| flags = 0; |
| } |
| |
| demux->segment_seqnum = gst_event_get_seqnum (event); |
| |
| flush = flags & GST_SEEK_FLAG_FLUSH; |
| |
| /* send flush start */ |
| if (flush) { |
| new_event = gst_event_new_flush_start (); |
| gst_event_set_seqnum (new_event, demux->segment_seqnum); |
| gst_dvdemux_push_event (demux, new_event); |
| } else { |
| gst_pad_pause_task (demux->sinkpad); |
| } |
| |
| /* grab streaming lock, this should eventually be possible, either |
| * because the task is paused or our streaming thread stopped |
| * because our peer is flushing. */ |
| GST_PAD_STREAM_LOCK (demux->sinkpad); |
| |
| /* make copy into temp structure, we can only update the main one |
| * when the subclass actually could to the seek. */ |
| memcpy (&seeksegment, &demux->time_segment, sizeof (GstSegment)); |
| |
| /* now configure the seek segment */ |
| if (event) { |
| gst_segment_do_seek (&seeksegment, rate, format, flags, |
| cur_type, cur, stop_type, stop, &update); |
| } |
| |
| GST_DEBUG_OBJECT (demux, "segment configured from %" G_GINT64_FORMAT |
| " to %" G_GINT64_FORMAT ", position %" G_GINT64_FORMAT, |
| seeksegment.start, seeksegment.stop, seeksegment.position); |
| |
| /* do the seek, segment.position contains new position. */ |
| res = gst_dvdemux_do_seek (demux, &seeksegment); |
| |
| /* and prepare to continue streaming */ |
| if (flush) { |
| /* send flush stop, peer will accept data and events again. We |
| * are not yet providing data as we still have the STREAM_LOCK. */ |
| new_event = gst_event_new_flush_stop (TRUE); |
| gst_event_set_seqnum (new_event, demux->segment_seqnum); |
| gst_dvdemux_push_event (demux, new_event); |
| } |
| |
| /* if successfull seek, we update our real segment and push |
| * out the new segment. */ |
| if (res) { |
| memcpy (&demux->time_segment, &seeksegment, sizeof (GstSegment)); |
| |
| if (demux->time_segment.flags & GST_SEEK_FLAG_SEGMENT) { |
| GstMessage *message; |
| |
| message = gst_message_new_segment_start (GST_OBJECT_CAST (demux), |
| demux->time_segment.format, demux->time_segment.position); |
| gst_message_set_seqnum (message, demux->segment_seqnum); |
| gst_element_post_message (GST_ELEMENT_CAST (demux), message); |
| } |
| if ((stop = demux->time_segment.stop) == -1) |
| stop = demux->time_segment.duration; |
| |
| GST_INFO_OBJECT (demux, |
| "Saving newsegment event to be sent in streaming thread"); |
| |
| if (demux->pending_segment) |
| gst_event_unref (demux->pending_segment); |
| |
| demux->pending_segment = gst_event_new_segment (&demux->time_segment); |
| gst_event_set_seqnum (demux->pending_segment, demux->segment_seqnum); |
| |
| demux->need_segment = FALSE; |
| } |
| |
| /* and restart the task in case it got paused explicitely or by |
| * the FLUSH_START event we pushed out. */ |
| gst_pad_start_task (demux->sinkpad, (GstTaskFunction) gst_dvdemux_loop, |
| demux->sinkpad, NULL); |
| |
| /* and release the lock again so we can continue streaming */ |
| GST_PAD_STREAM_UNLOCK (demux->sinkpad); |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| wrong_rate: |
| { |
| GST_DEBUG_OBJECT (demux, "negative playback rate %lf not supported.", rate); |
| return FALSE; |
| } |
| no_format: |
| { |
| GST_DEBUG_OBJECT (demux, "cannot convert to TIME format, seek aborted."); |
| return FALSE; |
| } |
| } |
| |
| static gboolean |
| gst_dvdemux_send_event (GstElement * element, GstEvent * event) |
| { |
| GstDVDemux *dvdemux = GST_DVDEMUX (element); |
| gboolean res = FALSE; |
| |
| switch (GST_EVENT_TYPE (event)) { |
| case GST_EVENT_SEEK: |
| { |
| /* checking header and configuring the seek must be atomic */ |
| GST_OBJECT_LOCK (dvdemux); |
| if (g_atomic_int_get (&dvdemux->found_header) == 0) { |
| GstEvent **event_p; |
| |
| event_p = &dvdemux->seek_event; |
| |
| /* We don't have pads yet. Keep the event. */ |
| GST_INFO_OBJECT (dvdemux, "Keeping the seek event for later"); |
| |
| gst_event_replace (event_p, event); |
| GST_OBJECT_UNLOCK (dvdemux); |
| |
| res = TRUE; |
| } else { |
| GST_OBJECT_UNLOCK (dvdemux); |
| |
| if (dvdemux->seek_handler) |
| res = dvdemux->seek_handler (dvdemux, dvdemux->videosrcpad, event); |
| gst_event_unref (event); |
| } |
| break; |
| } |
| default: |
| res = GST_ELEMENT_CLASS (parent_class)->send_event (element, event); |
| break; |
| } |
| |
| return res; |
| } |
| |
| /* handle an event on the source pad, it's most likely a seek */ |
| static gboolean |
| gst_dvdemux_handle_src_event (GstPad * pad, GstObject * parent, |
| GstEvent * event) |
| { |
| gboolean res = FALSE; |
| GstDVDemux *dvdemux; |
| |
| dvdemux = GST_DVDEMUX (parent); |
| |
| switch (GST_EVENT_TYPE (event)) { |
| case GST_EVENT_SEEK: |
| /* seek handler is installed based on scheduling mode */ |
| if (dvdemux->seek_handler) |
| res = dvdemux->seek_handler (dvdemux, pad, event); |
| gst_event_unref (event); |
| break; |
| default: |
| res = gst_pad_push_event (dvdemux->sinkpad, event); |
| break; |
| } |
| |
| return res; |
| } |
| |
| /* does not take ownership of buffer */ |
| static GstFlowReturn |
| gst_dvdemux_demux_audio (GstDVDemux * dvdemux, GstBuffer * buffer, |
| guint64 duration) |
| { |
| gint num_samples; |
| GstFlowReturn ret; |
| GstMapInfo map; |
| |
| gst_buffer_map (buffer, &map, GST_MAP_READ); |
| dv_decode_full_audio (dvdemux->decoder, map.data, dvdemux->audio_buffers); |
| gst_buffer_unmap (buffer, &map); |
| |
| if (G_LIKELY ((num_samples = dv_get_num_samples (dvdemux->decoder)) > 0)) { |
| gint16 *a_ptr; |
| gint i, j; |
| GstBuffer *outbuf; |
| gint frequency, channels; |
| |
| /* get initial format or check if format changed */ |
| frequency = dv_get_frequency (dvdemux->decoder); |
| channels = dv_get_num_channels (dvdemux->decoder); |
| |
| if (G_UNLIKELY ((dvdemux->audiosrcpad == NULL) |
| || (frequency != dvdemux->frequency) |
| || (channels != dvdemux->channels))) { |
| GstCaps *caps; |
| GstAudioInfo info; |
| |
| dvdemux->frequency = frequency; |
| dvdemux->channels = channels; |
| |
| gst_audio_info_init (&info); |
| gst_audio_info_set_format (&info, GST_AUDIO_FORMAT_S16LE, |
| frequency, channels, NULL); |
| caps = gst_audio_info_to_caps (&info); |
| if (G_UNLIKELY (dvdemux->audiosrcpad == NULL)) { |
| dvdemux->audiosrcpad = |
| gst_dvdemux_add_pad (dvdemux, &audio_src_temp, caps); |
| } else { |
| gst_pad_set_caps (dvdemux->audiosrcpad, caps); |
| } |
| gst_caps_unref (caps); |
| } |
| |
| outbuf = gst_buffer_new_and_alloc (num_samples * |
| sizeof (gint16) * dvdemux->channels); |
| |
| gst_buffer_map (outbuf, &map, GST_MAP_WRITE); |
| a_ptr = (gint16 *) map.data; |
| |
| for (i = 0; i < num_samples; i++) { |
| for (j = 0; j < dvdemux->channels; j++) { |
| *(a_ptr++) = dvdemux->audio_buffers[j][i]; |
| } |
| } |
| gst_buffer_unmap (outbuf, &map); |
| |
| GST_DEBUG ("pushing audio %" GST_TIME_FORMAT, |
| GST_TIME_ARGS (dvdemux->time_segment.position)); |
| |
| GST_BUFFER_TIMESTAMP (outbuf) = dvdemux->time_segment.position; |
| GST_BUFFER_DURATION (outbuf) = duration; |
| GST_BUFFER_OFFSET (outbuf) = dvdemux->audio_offset; |
| dvdemux->audio_offset += num_samples; |
| GST_BUFFER_OFFSET_END (outbuf) = dvdemux->audio_offset; |
| |
| if (dvdemux->new_media || dvdemux->discont) |
| GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT); |
| |
| ret = gst_pad_push (dvdemux->audiosrcpad, outbuf); |
| } else { |
| /* no samples */ |
| ret = GST_FLOW_OK; |
| } |
| |
| return ret; |
| } |
| |
| /* takes ownership of buffer */ |
| static GstFlowReturn |
| gst_dvdemux_demux_video (GstDVDemux * dvdemux, GstBuffer * buffer, |
| guint64 duration) |
| { |
| GstBuffer *outbuf; |
| gint height; |
| gboolean wide; |
| GstFlowReturn ret = GST_FLOW_OK; |
| |
| /* get params */ |
| /* framerate is already up-to-date */ |
| height = dvdemux->decoder->height; |
| wide = dv_format_wide (dvdemux->decoder); |
| |
| /* see if anything changed */ |
| if (G_UNLIKELY ((dvdemux->videosrcpad == NULL) || (dvdemux->height != height) |
| || dvdemux->wide != wide)) { |
| gint par_x, par_y; |
| GstCaps *caps; |
| |
| dvdemux->height = height; |
| dvdemux->wide = wide; |
| |
| if (dvdemux->decoder->system == e_dv_system_625_50) { |
| if (wide) { |
| par_x = PAL_WIDE_PAR_X; |
| par_y = PAL_WIDE_PAR_Y; |
| } else { |
| par_x = PAL_NORMAL_PAR_X; |
| par_y = PAL_NORMAL_PAR_Y; |
| } |
| } else { |
| if (wide) { |
| par_x = NTSC_WIDE_PAR_X; |
| par_y = NTSC_WIDE_PAR_Y; |
| } else { |
| par_x = NTSC_NORMAL_PAR_X; |
| par_y = NTSC_NORMAL_PAR_Y; |
| } |
| } |
| |
| caps = gst_caps_new_simple ("video/x-dv", |
| "systemstream", G_TYPE_BOOLEAN, FALSE, |
| "width", G_TYPE_INT, 720, |
| "height", G_TYPE_INT, height, |
| "framerate", GST_TYPE_FRACTION, dvdemux->framerate_numerator, |
| dvdemux->framerate_denominator, |
| "pixel-aspect-ratio", GST_TYPE_FRACTION, par_x, par_y, NULL); |
| |
| if (G_UNLIKELY (dvdemux->videosrcpad == NULL)) { |
| dvdemux->videosrcpad = |
| gst_dvdemux_add_pad (dvdemux, &video_src_temp, caps); |
| } else { |
| gst_pad_set_caps (dvdemux->videosrcpad, caps); |
| } |
| gst_caps_unref (caps); |
| } |
| |
| /* takes ownership of buffer here, we just need to modify |
| * the metadata. */ |
| outbuf = gst_buffer_make_writable (buffer); |
| |
| GST_BUFFER_TIMESTAMP (outbuf) = dvdemux->time_segment.position; |
| GST_BUFFER_OFFSET (outbuf) = dvdemux->video_offset; |
| GST_BUFFER_OFFSET_END (outbuf) = dvdemux->video_offset + 1; |
| GST_BUFFER_DURATION (outbuf) = duration; |
| |
| if (dvdemux->new_media || dvdemux->discont) |
| GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT); |
| |
| GST_DEBUG ("pushing video %" GST_TIME_FORMAT, |
| GST_TIME_ARGS (dvdemux->time_segment.position)); |
| |
| ret = gst_pad_push (dvdemux->videosrcpad, outbuf); |
| |
| dvdemux->video_offset++; |
| |
| return ret; |
| } |
| |
| static int |
| get_ssyb_offset (int dif, int ssyb) |
| { |
| int offset; |
| |
| offset = dif * 12000; /* to dif */ |
| offset += 80 * (1 + (ssyb / 6)); /* to subcode pack */ |
| offset += 3; /* past header */ |
| offset += 8 * (ssyb % 6); /* to ssyb */ |
| |
| return offset; |
| } |
| |
| static gboolean |
| gst_dvdemux_get_timecode (GstDVDemux * dvdemux, GstBuffer * buffer, |
| GstSMPTETimeCode * timecode) |
| { |
| guint8 *data; |
| GstMapInfo map; |
| int offset; |
| int dif; |
| int n_difs = dvdemux->decoder->num_dif_seqs; |
| |
| gst_buffer_map (buffer, &map, GST_MAP_READ); |
| data = map.data; |
| for (dif = 0; dif < n_difs; dif++) { |
| offset = get_ssyb_offset (dif, 3); |
| if (data[offset + 3] == 0x13) { |
| timecode->frames = ((data[offset + 4] >> 4) & 0x3) * 10 + |
| (data[offset + 4] & 0xf); |
| timecode->seconds = ((data[offset + 5] >> 4) & 0x3) * 10 + |
| (data[offset + 5] & 0xf); |
| timecode->minutes = ((data[offset + 6] >> 4) & 0x3) * 10 + |
| (data[offset + 6] & 0xf); |
| timecode->hours = ((data[offset + 7] >> 4) & 0x3) * 10 + |
| (data[offset + 7] & 0xf); |
| GST_DEBUG ("got timecode %" GST_SMPTE_TIME_CODE_FORMAT, |
| GST_SMPTE_TIME_CODE_ARGS (timecode)); |
| gst_buffer_unmap (buffer, &map); |
| return TRUE; |
| } |
| } |
| |
| gst_buffer_unmap (buffer, &map); |
| return FALSE; |
| } |
| |
| static gboolean |
| gst_dvdemux_is_new_media (GstDVDemux * dvdemux, GstBuffer * buffer) |
| { |
| guint8 *data; |
| GstMapInfo map; |
| int aaux_offset; |
| int dif; |
| int n_difs; |
| |
| n_difs = dvdemux->decoder->num_dif_seqs; |
| |
| gst_buffer_map (buffer, &map, GST_MAP_READ); |
| data = map.data; |
| for (dif = 0; dif < n_difs; dif++) { |
| if (dif & 1) { |
| aaux_offset = (dif * 12000) + (6 + 16 * 1) * 80 + 3; |
| } else { |
| aaux_offset = (dif * 12000) + (6 + 16 * 4) * 80 + 3; |
| } |
| if (data[aaux_offset + 0] == 0x51) { |
| if ((data[aaux_offset + 2] & 0x80) == 0) { |
| gst_buffer_unmap (buffer, &map); |
| return TRUE; |
| } |
| } |
| } |
| |
| gst_buffer_unmap (buffer, &map); |
| return FALSE; |
| } |
| |
| /* takes ownership of buffer */ |
| static GstFlowReturn |
| gst_dvdemux_demux_frame (GstDVDemux * dvdemux, GstBuffer * buffer) |
| { |
| GstClockTime next_ts; |
| GstFlowReturn aret, vret, ret; |
| GstMapInfo map; |
| guint64 duration; |
| GstSMPTETimeCode timecode; |
| int frame_number; |
| |
| if (dvdemux->need_segment) { |
| GstFormat format; |
| GstEvent *event; |
| |
| g_assert (!dvdemux->upstream_time_segment); |
| |
| /* convert to time and store as start/end_timestamp */ |
| format = GST_FORMAT_TIME; |
| if (!(gst_dvdemux_convert_sink_pair (dvdemux, |
| GST_FORMAT_BYTES, dvdemux->byte_segment.start, |
| dvdemux->byte_segment.stop, format, |
| (gint64 *) & dvdemux->time_segment.start, |
| (gint64 *) & dvdemux->time_segment.stop))) |
| goto segment_error; |
| |
| dvdemux->time_segment.time = dvdemux->time_segment.start; |
| dvdemux->time_segment.rate = dvdemux->byte_segment.rate; |
| |
| gst_dvdemux_sink_convert (dvdemux, |
| GST_FORMAT_BYTES, dvdemux->byte_segment.position, |
| GST_FORMAT_TIME, (gint64 *) & dvdemux->time_segment.position); |
| |
| gst_dvdemux_update_frame_offsets (dvdemux, dvdemux->time_segment.position); |
| |
| GST_DEBUG_OBJECT (dvdemux, "sending segment start: %" GST_TIME_FORMAT |
| ", stop: %" GST_TIME_FORMAT ", time: %" GST_TIME_FORMAT, |
| GST_TIME_ARGS (dvdemux->time_segment.start), |
| GST_TIME_ARGS (dvdemux->time_segment.stop), |
| GST_TIME_ARGS (dvdemux->time_segment.start)); |
| |
| event = gst_event_new_segment (&dvdemux->time_segment); |
| if (dvdemux->segment_seqnum) |
| gst_event_set_seqnum (event, dvdemux->segment_seqnum); |
| gst_dvdemux_push_event (dvdemux, event); |
| |
| dvdemux->need_segment = FALSE; |
| } |
| |
| gst_dvdemux_get_timecode (dvdemux, buffer, &timecode); |
| gst_smpte_time_code_get_frame_number ( |
| (dvdemux->decoder->system == e_dv_system_625_50) ? |
| GST_SMPTE_TIME_CODE_SYSTEM_25 : GST_SMPTE_TIME_CODE_SYSTEM_30, |
| &frame_number, &timecode); |
| |
| if (dvdemux->time_segment.rate < 0) { |
| next_ts = gst_util_uint64_scale_int ( |
| (dvdemux->frame_offset > |
| 0 ? dvdemux->frame_offset - 1 : 0) * GST_SECOND, |
| dvdemux->framerate_denominator, dvdemux->framerate_numerator); |
| duration = dvdemux->time_segment.position - next_ts; |
| } else { |
| next_ts = gst_util_uint64_scale_int ( |
| (dvdemux->frame_offset + 1) * GST_SECOND, |
| dvdemux->framerate_denominator, dvdemux->framerate_numerator); |
| duration = next_ts - dvdemux->time_segment.position; |
| } |
| |
| gst_buffer_map (buffer, &map, GST_MAP_READ); |
| dv_parse_packs (dvdemux->decoder, map.data); |
| gst_buffer_unmap (buffer, &map); |
| dvdemux->new_media = FALSE; |
| if (gst_dvdemux_is_new_media (dvdemux, buffer) && |
| dvdemux->frames_since_new_media > 2) { |
| dvdemux->new_media = TRUE; |
| dvdemux->frames_since_new_media = 0; |
| } |
| dvdemux->frames_since_new_media++; |
| |
| /* does not take ownership of buffer */ |
| aret = ret = gst_dvdemux_demux_audio (dvdemux, buffer, duration); |
| if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED)) { |
| gst_buffer_unref (buffer); |
| goto done; |
| } |
| |
| /* takes ownership of buffer */ |
| vret = ret = gst_dvdemux_demux_video (dvdemux, buffer, duration); |
| if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED)) |
| goto done; |
| |
| /* if both are not linked, we stop */ |
| if (G_UNLIKELY (aret == GST_FLOW_NOT_LINKED && vret == GST_FLOW_NOT_LINKED)) { |
| ret = GST_FLOW_NOT_LINKED; |
| goto done; |
| } |
| |
| dvdemux->discont = FALSE; |
| dvdemux->time_segment.position = next_ts; |
| |
| if (dvdemux->time_segment.rate < 0) { |
| if (dvdemux->frame_offset > 0) |
| dvdemux->frame_offset--; |
| else |
| GST_WARNING_OBJECT (dvdemux, |
| "Got before frame offset 0 in reverse playback"); |
| } else { |
| dvdemux->frame_offset++; |
| } |
| |
| /* check for the end of the segment */ |
| if ((dvdemux->time_segment.rate > 0 && dvdemux->time_segment.stop != -1 |
| && next_ts > dvdemux->time_segment.stop) |
| || (dvdemux->time_segment.rate < 0 |
| && dvdemux->time_segment.start > next_ts)) |
| ret = GST_FLOW_EOS; |
| else |
| ret = GST_FLOW_OK; |
| |
| done: |
| return ret; |
| |
| /* ERRORS */ |
| segment_error: |
| { |
| GST_DEBUG ("error generating new_segment event"); |
| gst_buffer_unref (buffer); |
| return GST_FLOW_ERROR; |
| } |
| } |
| |
| /* flush any remaining data in the adapter, used in chain based scheduling mode */ |
| static GstFlowReturn |
| gst_dvdemux_flush (GstDVDemux * dvdemux) |
| { |
| GstFlowReturn ret = GST_FLOW_OK; |
| |
| while (gst_adapter_available (dvdemux->adapter) >= dvdemux->frame_len) { |
| const guint8 *data; |
| gint length; |
| |
| /* get the accumulated bytes */ |
| data = gst_adapter_map (dvdemux->adapter, dvdemux->frame_len); |
| |
| /* parse header to know the length and other params */ |
| if (G_UNLIKELY (dv_parse_header (dvdemux->decoder, data) < 0)) { |
| gst_adapter_unmap (dvdemux->adapter); |
| goto parse_header_error; |
| } |
| gst_adapter_unmap (dvdemux->adapter); |
| |
| /* after parsing the header we know the length of the data */ |
| length = dvdemux->frame_len = dvdemux->decoder->frame_size; |
| if (dvdemux->decoder->system == e_dv_system_625_50) { |
| dvdemux->framerate_numerator = PAL_FRAMERATE_NUMERATOR; |
| dvdemux->framerate_denominator = PAL_FRAMERATE_DENOMINATOR; |
| } else { |
| dvdemux->framerate_numerator = NTSC_FRAMERATE_NUMERATOR; |
| dvdemux->framerate_denominator = NTSC_FRAMERATE_DENOMINATOR; |
| } |
| g_atomic_int_set (&dvdemux->found_header, 1); |
| |
| /* let demux_video set the height, it needs to detect when things change so |
| * it can reset caps */ |
| |
| /* if we still have enough for a frame, start decoding */ |
| if (G_LIKELY (gst_adapter_available (dvdemux->adapter) >= length)) { |
| GstBuffer *buffer; |
| |
| buffer = gst_adapter_take_buffer (dvdemux->adapter, length); |
| |
| /* and decode the buffer, takes ownership */ |
| ret = gst_dvdemux_demux_frame (dvdemux, buffer); |
| if (G_UNLIKELY (ret != GST_FLOW_OK)) |
| goto done; |
| } |
| } |
| done: |
| return ret; |
| |
| /* ERRORS */ |
| parse_header_error: |
| { |
| GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE, |
| (NULL), ("Error parsing DV header")); |
| return GST_FLOW_ERROR; |
| } |
| } |
| |
| /* streaming operation: |
| * |
| * accumulate data until we have a frame, then decode. |
| */ |
| static GstFlowReturn |
| gst_dvdemux_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer) |
| { |
| GstDVDemux *dvdemux; |
| GstFlowReturn ret; |
| GstClockTime timestamp; |
| |
| dvdemux = GST_DVDEMUX (parent); |
| |
| /* a discontinuity in the stream, we need to get rid of |
| * accumulated data in the adapter and assume a new frame |
| * starts after the discontinuity */ |
| if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) { |
| gst_adapter_clear (dvdemux->adapter); |
| dvdemux->discont = TRUE; |
| |
| /* Should recheck where we are */ |
| if (!dvdemux->upstream_time_segment) |
| dvdemux->need_segment = TRUE; |
| } |
| |
| /* a timestamp always should be respected */ |
| timestamp = GST_BUFFER_TIMESTAMP (buffer); |
| if (GST_CLOCK_TIME_IS_VALID (timestamp)) { |
| dvdemux->time_segment.position = timestamp; |
| |
| if (dvdemux->discont) |
| gst_dvdemux_update_frame_offsets (dvdemux, |
| dvdemux->time_segment.position); |
| } else if (dvdemux->upstream_time_segment && dvdemux->discont) { |
| /* This will probably fail later to provide correct |
| * timestamps and/or durations but also should not happen */ |
| GST_ERROR_OBJECT (dvdemux, |
| "Upstream provides TIME segment but no PTS after discont"); |
| } |
| |
| gst_adapter_push (dvdemux->adapter, buffer); |
| |
| /* Apparently dv_parse_header can read from the body of the frame |
| * too, so it needs more than header_size bytes. Wacky! |
| */ |
| if (G_UNLIKELY (dvdemux->frame_len == -1)) { |
| /* if we don't know the length of a frame, we assume it is |
| * the NTSC_BUFFER length, as this is enough to figure out |
| * if this is PAL or NTSC */ |
| dvdemux->frame_len = NTSC_BUFFER; |
| } |
| |
| /* and try to flush pending frames */ |
| ret = gst_dvdemux_flush (dvdemux); |
| |
| return ret; |
| } |
| |
| /* pull based operation. |
| * |
| * Read header first to figure out the frame size. Then read |
| * and decode full frames. |
| */ |
| static void |
| gst_dvdemux_loop (GstPad * pad) |
| { |
| GstFlowReturn ret; |
| GstDVDemux *dvdemux; |
| GstBuffer *buffer = NULL; |
| GstMapInfo map; |
| |
| dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad)); |
| |
| if (G_UNLIKELY (g_atomic_int_get (&dvdemux->found_header) == 0)) { |
| GST_DEBUG_OBJECT (dvdemux, "pulling first buffer"); |
| /* pull in NTSC sized buffer to figure out the frame |
| * length */ |
| ret = gst_pad_pull_range (dvdemux->sinkpad, |
| dvdemux->byte_segment.position, NTSC_BUFFER, &buffer); |
| if (G_UNLIKELY (ret != GST_FLOW_OK)) |
| goto pause; |
| |
| /* check buffer size, don't want to read small buffers */ |
| if (G_UNLIKELY (gst_buffer_get_size (buffer) < NTSC_BUFFER)) |
| goto small_buffer; |
| |
| gst_buffer_map (buffer, &map, GST_MAP_READ); |
| /* parse header to know the length and other params */ |
| if (G_UNLIKELY (dv_parse_header (dvdemux->decoder, map.data) < 0)) { |
| gst_buffer_unmap (buffer, &map); |
| goto parse_header_error; |
| } |
| gst_buffer_unmap (buffer, &map); |
| |
| /* after parsing the header we know the length of the data */ |
| dvdemux->frame_len = dvdemux->decoder->frame_size; |
| if (dvdemux->decoder->system == e_dv_system_625_50) { |
| dvdemux->framerate_numerator = PAL_FRAMERATE_NUMERATOR; |
| dvdemux->framerate_denominator = PAL_FRAMERATE_DENOMINATOR; |
| } else { |
| dvdemux->framerate_numerator = NTSC_FRAMERATE_NUMERATOR; |
| dvdemux->framerate_denominator = NTSC_FRAMERATE_DENOMINATOR; |
| } |
| dvdemux->need_segment = TRUE; |
| |
| /* see if we need to read a larger part */ |
| if (dvdemux->frame_len != NTSC_BUFFER) { |
| gst_buffer_unref (buffer); |
| buffer = NULL; |
| } |
| |
| { |
| GstEvent *event; |
| |
| /* setting header and prrforming the seek must be atomic */ |
| GST_OBJECT_LOCK (dvdemux); |
| /* got header now */ |
| g_atomic_int_set (&dvdemux->found_header, 1); |
| |
| /* now perform pending seek if any. */ |
| event = dvdemux->seek_event; |
| if (event) |
| gst_event_ref (event); |
| GST_OBJECT_UNLOCK (dvdemux); |
| |
| if (event) { |
| if (!gst_dvdemux_handle_pull_seek (dvdemux, dvdemux->videosrcpad, |
| event)) { |
| GST_ELEMENT_WARNING (dvdemux, STREAM, DECODE, (NULL), |
| ("Error perfoming initial seek")); |
| } |
| gst_event_unref (event); |
| |
| /* and we need to pull a new buffer in all cases. */ |
| if (buffer) { |
| gst_buffer_unref (buffer); |
| buffer = NULL; |
| } |
| } |
| } |
| } |
| |
| if (G_UNLIKELY (dvdemux->pending_segment)) { |
| |
| /* now send the newsegment */ |
| GST_DEBUG_OBJECT (dvdemux, "Sending newsegment from"); |
| |
| gst_dvdemux_push_event (dvdemux, dvdemux->pending_segment); |
| dvdemux->pending_segment = NULL; |
| } |
| |
| if (G_LIKELY (buffer == NULL)) { |
| GST_DEBUG_OBJECT (dvdemux, "pulling buffer at offset %" G_GINT64_FORMAT, |
| dvdemux->byte_segment.position); |
| |
| ret = gst_pad_pull_range (dvdemux->sinkpad, |
| dvdemux->byte_segment.position, dvdemux->frame_len, &buffer); |
| if (ret != GST_FLOW_OK) |
| goto pause; |
| |
| /* check buffer size, don't want to read small buffers */ |
| if (gst_buffer_get_size (buffer) < dvdemux->frame_len) |
| goto small_buffer; |
| } |
| /* and decode the buffer */ |
| ret = gst_dvdemux_demux_frame (dvdemux, buffer); |
| if (G_UNLIKELY (ret != GST_FLOW_OK)) |
| goto pause; |
| |
| /* and position ourselves for the next buffer */ |
| dvdemux->byte_segment.position += dvdemux->frame_len; |
| |
| done: |
| gst_object_unref (dvdemux); |
| |
| return; |
| |
| /* ERRORS */ |
| parse_header_error: |
| { |
| GstEvent *event; |
| |
| GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE, |
| (NULL), ("Error parsing DV header")); |
| gst_buffer_unref (buffer); |
| gst_pad_pause_task (dvdemux->sinkpad); |
| event = gst_event_new_eos (); |
| if (dvdemux->segment_seqnum) |
| gst_event_set_seqnum (event, dvdemux->segment_seqnum); |
| gst_dvdemux_push_event (dvdemux, event); |
| goto done; |
| } |
| small_buffer: |
| { |
| GstEvent *event; |
| |
| GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE, |
| (NULL), ("Error reading buffer")); |
| gst_buffer_unref (buffer); |
| gst_pad_pause_task (dvdemux->sinkpad); |
| event = gst_event_new_eos (); |
| if (dvdemux->segment_seqnum) |
| gst_event_set_seqnum (event, dvdemux->segment_seqnum); |
| gst_dvdemux_push_event (dvdemux, event); |
| goto done; |
| } |
| pause: |
| { |
| GST_INFO_OBJECT (dvdemux, "pausing task, %s", gst_flow_get_name (ret)); |
| gst_pad_pause_task (dvdemux->sinkpad); |
| if (ret == GST_FLOW_EOS) { |
| GST_LOG_OBJECT (dvdemux, "got eos"); |
| /* so align our position with the end of it, if there is one |
| * this ensures a subsequent will arrive at correct base/acc time */ |
| if (dvdemux->time_segment.rate > 0.0 && |
| GST_CLOCK_TIME_IS_VALID (dvdemux->time_segment.stop)) |
| dvdemux->time_segment.position = dvdemux->time_segment.stop; |
| else if (dvdemux->time_segment.rate < 0.0) |
| dvdemux->time_segment.position = dvdemux->time_segment.start; |
| /* perform EOS logic */ |
| if (dvdemux->time_segment.flags & GST_SEEK_FLAG_SEGMENT) { |
| GstMessage *message; |
| GstEvent *event; |
| |
| event = gst_event_new_segment_done (dvdemux->time_segment.format, |
| dvdemux->time_segment.position); |
| if (dvdemux->segment_seqnum) |
| gst_event_set_seqnum (event, dvdemux->segment_seqnum); |
| |
| message = gst_message_new_segment_done (GST_OBJECT_CAST (dvdemux), |
| dvdemux->time_segment.format, dvdemux->time_segment.position); |
| if (dvdemux->segment_seqnum) |
| gst_message_set_seqnum (message, dvdemux->segment_seqnum); |
| |
| gst_element_post_message (GST_ELEMENT (dvdemux), message); |
| gst_dvdemux_push_event (dvdemux, event); |
| } else { |
| GstEvent *event = gst_event_new_eos (); |
| if (dvdemux->segment_seqnum) |
| gst_event_set_seqnum (event, dvdemux->segment_seqnum); |
| gst_dvdemux_push_event (dvdemux, event); |
| } |
| } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) { |
| GstEvent *event = gst_event_new_eos (); |
| /* for fatal errors or not-linked we post an error message */ |
| GST_ELEMENT_FLOW_ERROR (dvdemux, ret); |
| if (dvdemux->segment_seqnum) |
| gst_event_set_seqnum (event, dvdemux->segment_seqnum); |
| gst_dvdemux_push_event (dvdemux, event); |
| } |
| goto done; |
| } |
| } |
| |
| static gboolean |
| gst_dvdemux_sink_activate_mode (GstPad * sinkpad, GstObject * parent, |
| GstPadMode mode, gboolean active) |
| { |
| gboolean res; |
| GstDVDemux *demux = GST_DVDEMUX (parent); |
| |
| switch (mode) { |
| case GST_PAD_MODE_PULL: |
| if (active) { |
| demux->seek_handler = gst_dvdemux_handle_pull_seek; |
| res = gst_pad_start_task (sinkpad, |
| (GstTaskFunction) gst_dvdemux_loop, sinkpad, NULL); |
| } else { |
| demux->seek_handler = NULL; |
| res = gst_pad_stop_task (sinkpad); |
| } |
| break; |
| case GST_PAD_MODE_PUSH: |
| if (active) { |
| GST_DEBUG_OBJECT (demux, "activating push/chain function"); |
| demux->seek_handler = gst_dvdemux_handle_push_seek; |
| } else { |
| GST_DEBUG_OBJECT (demux, "deactivating push/chain function"); |
| demux->seek_handler = NULL; |
| } |
| res = TRUE; |
| break; |
| default: |
| res = FALSE; |
| break; |
| } |
| return res; |
| } |
| |
| /* decide on push or pull based scheduling */ |
| static gboolean |
| gst_dvdemux_sink_activate (GstPad * sinkpad, GstObject * parent) |
| { |
| GstQuery *query; |
| gboolean pull_mode; |
| |
| query = gst_query_new_scheduling (); |
| |
| if (!gst_pad_peer_query (sinkpad, query)) { |
| gst_query_unref (query); |
| goto activate_push; |
| } |
| |
| pull_mode = gst_query_has_scheduling_mode_with_flags (query, |
| GST_PAD_MODE_PULL, GST_SCHEDULING_FLAG_SEEKABLE); |
| gst_query_unref (query); |
| |
| if (!pull_mode) |
| goto activate_push; |
| |
| GST_DEBUG_OBJECT (sinkpad, "activating pull"); |
| return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE); |
| |
| activate_push: |
| { |
| GST_DEBUG_OBJECT (sinkpad, "activating push"); |
| return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE); |
| } |
| } |
| |
| static GstStateChangeReturn |
| gst_dvdemux_change_state (GstElement * element, GstStateChange transition) |
| { |
| GstDVDemux *dvdemux = GST_DVDEMUX (element); |
| GstStateChangeReturn ret; |
| |
| switch (transition) { |
| case GST_STATE_CHANGE_NULL_TO_READY: |
| break; |
| case GST_STATE_CHANGE_READY_TO_PAUSED: |
| dvdemux->decoder = dv_decoder_new (0, FALSE, FALSE); |
| dv_set_error_log (dvdemux->decoder, NULL); |
| gst_dvdemux_reset (dvdemux); |
| break; |
| case GST_STATE_CHANGE_PAUSED_TO_PLAYING: |
| break; |
| default: |
| break; |
| } |
| |
| ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); |
| |
| switch (transition) { |
| case GST_STATE_CHANGE_PLAYING_TO_PAUSED: |
| break; |
| case GST_STATE_CHANGE_PAUSED_TO_READY: |
| gst_adapter_clear (dvdemux->adapter); |
| dv_decoder_free (dvdemux->decoder); |
| dvdemux->decoder = NULL; |
| |
| gst_dvdemux_remove_pads (dvdemux); |
| break; |
| case GST_STATE_CHANGE_READY_TO_NULL: |
| { |
| GstEvent **event_p; |
| |
| event_p = &dvdemux->seek_event; |
| gst_event_replace (event_p, NULL); |
| if (dvdemux->pending_segment) |
| gst_event_unref (dvdemux->pending_segment); |
| dvdemux->pending_segment = NULL; |
| break; |
| } |
| default: |
| break; |
| } |
| return ret; |
| } |