static gboolean gst_gio_base_sink_event (GstBaseSink * base_sink, GstEvent * event) { GstGioBaseSink *sink = GST_GIO_BASE_SINK (base_sink); GstFlowReturn ret = GST_FLOW_OK; if (sink->stream == NULL) return TRUE; switch (GST_EVENT_TYPE (event)) { case GST_EVENT_SEGMENT: if (G_IS_OUTPUT_STREAM (sink->stream)) { const GstSegment *segment; gst_event_parse_segment (event, &segment); if (segment->format != GST_FORMAT_BYTES) { GST_WARNING_OBJECT (sink, "ignored SEGMENT event in %s format", gst_format_get_name (segment->format)); break; } if (GST_GIO_STREAM_IS_SEEKABLE (sink->stream)) { ret = gst_gio_seek (sink, G_SEEKABLE (sink->stream), segment->start, sink->cancel); if (ret == GST_FLOW_OK) sink->position = segment->start; } else { ret = GST_FLOW_NOT_SUPPORTED; } } break; case GST_EVENT_EOS: case GST_EVENT_FLUSH_START: if (G_IS_OUTPUT_STREAM (sink->stream)) { gboolean success; GError *err = NULL; success = g_output_stream_flush (sink->stream, sink->cancel, &err); if (!success && !gst_gio_error (sink, "g_output_stream_flush", &err, &ret)) { GST_ELEMENT_ERROR (sink, RESOURCE, WRITE, (NULL), ("flush failed: %s", err->message)); g_clear_error (&err); } } break; default: break; } if (ret == GST_FLOW_OK) return GST_BASE_SINK_CLASS (parent_class)->event (base_sink, event); else { gst_event_unref (event); return FALSE; } }
static GstFlowReturn gst_gio_base_src_create (GstBaseSrc * base_src, guint64 offset, guint size, GstBuffer ** buf_return) { GstGioBaseSrc *src = GST_GIO_BASE_SRC (base_src); GstBuffer *buf; GstFlowReturn ret = GST_FLOW_OK; g_return_val_if_fail (G_IS_INPUT_STREAM (src->stream), GST_FLOW_ERROR); /* If we have the requested part in our cache take a subbuffer of that, * otherwise fill the cache again with at least 4096 bytes from the * requested offset and return a subbuffer of that. * * We need caching because every read/seek operation will need to go * over DBus if our backend is GVfs and this is painfully slow. */ if (src->cache && offset >= GST_BUFFER_OFFSET (src->cache) && offset + size <= GST_BUFFER_OFFSET_END (src->cache)) { GST_DEBUG_OBJECT (src, "Creating subbuffer from cached buffer: offset %" G_GUINT64_FORMAT " length %u", offset, size); buf = gst_buffer_copy_region (src->cache, GST_BUFFER_COPY_ALL, offset - GST_BUFFER_OFFSET (src->cache), size); GST_BUFFER_OFFSET (buf) = offset; GST_BUFFER_OFFSET_END (buf) = offset + size; } else { guint cachesize = MAX (4096, size); GstMapInfo map; gssize read, res; gboolean success, eos; GError *err = NULL; if (src->cache) { gst_buffer_unref (src->cache); src->cache = NULL; } if (G_UNLIKELY (offset != src->position)) { if (!GST_GIO_STREAM_IS_SEEKABLE (src->stream)) return GST_FLOW_NOT_SUPPORTED; GST_DEBUG_OBJECT (src, "Seeking to position %" G_GUINT64_FORMAT, offset); ret = gst_gio_seek (src, G_SEEKABLE (src->stream), offset, src->cancel); if (ret == GST_FLOW_OK) src->position = offset; else return ret; } src->cache = gst_buffer_new_and_alloc (cachesize); if (G_UNLIKELY (src->cache == NULL)) { GST_ERROR_OBJECT (src, "Failed to allocate %u bytes", cachesize); return GST_FLOW_ERROR; } GST_LOG_OBJECT (src, "Reading %u bytes from offset %" G_GUINT64_FORMAT, cachesize, offset); /* GIO sometimes gives less bytes than requested although * it's not at the end of file. SMB for example only * supports reads up to 64k. So we loop here until we get at * at least the requested amount of bytes or a read returns * nothing. */ gst_buffer_map (src->cache, &map, GST_MAP_WRITE); read = 0; while (size - read > 0 && (res = g_input_stream_read (G_INPUT_STREAM (src->stream), map.data + read, cachesize - read, src->cancel, &err)) > 0) { read += res; } gst_buffer_unmap (src->cache, &map); success = (read >= 0); eos = (cachesize > 0 && read == 0); if (!success && !gst_gio_error (src, "g_input_stream_read", &err, &ret)) { GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL), ("Could not read from stream: %s", err->message)); g_clear_error (&err); } if (success && !eos) { src->position += read; GST_BUFFER_OFFSET (src->cache) = offset; GST_BUFFER_OFFSET_END (src->cache) = offset + read; GST_DEBUG_OBJECT (src, "Read successful"); GST_DEBUG_OBJECT (src, "Creating subbuffer from new " "cached buffer: offset %" G_GUINT64_FORMAT " length %u", offset, size); buf = gst_buffer_copy_region (src->cache, GST_BUFFER_COPY_ALL, 0, MIN (size, read)); GST_BUFFER_OFFSET (buf) = offset; GST_BUFFER_OFFSET_END (buf) = offset + MIN (size, read); } else { GST_DEBUG_OBJECT (src, "Read not successful"); gst_buffer_unref (src->cache); src->cache = NULL; buf = NULL; } if (eos) ret = GST_FLOW_EOS; } *buf_return = buf; return ret; }