static GstFlowReturn gst_video_test_src_create (GstPushSrc * psrc, GstBuffer ** buffer) { GstVideoTestSrc *src; gulong newsize; GstBuffer *outbuf; GstFlowReturn res; GstClockTime next_time; src = GST_VIDEO_TEST_SRC (psrc); if (G_UNLIKELY (src->fourcc == NULL)) goto not_negotiated; /* 0 framerate and we are at the second frame, eos */ if (G_UNLIKELY (src->rate_numerator == 0 && src->n_frames == 1)) goto eos; newsize = gst_video_test_src_get_size (src, src->width, src->height); g_return_val_if_fail (newsize > 0, GST_FLOW_ERROR); GST_LOG_OBJECT (src, "creating buffer of %lu bytes with %dx%d image for frame %d", newsize, src->width, src->height, (gint) src->n_frames); #ifdef USE_PEER_BUFFERALLOC res = gst_pad_alloc_buffer_and_set_caps (GST_BASE_SRC_PAD (psrc), GST_BUFFER_OFFSET_NONE, newsize, GST_PAD_CAPS (GST_BASE_SRC_PAD (psrc)), &outbuf); if (res != GST_FLOW_OK) goto no_buffer; #else outbuf = gst_buffer_new_and_alloc (newsize); gst_buffer_set_caps (outbuf, GST_PAD_CAPS (GST_BASE_SRC_PAD (psrc))); #endif if (src->pattern_type == GST_VIDEO_TEST_SRC_BLINK) { if (src->n_frames & 0x1) { gst_video_test_src_white (src, (void *) GST_BUFFER_DATA (outbuf), src->width, src->height); } else { gst_video_test_src_black (src, (void *) GST_BUFFER_DATA (outbuf), src->width, src->height); } } else { src->make_image (src, (void *) GST_BUFFER_DATA (outbuf), src->width, src->height); } GST_BUFFER_TIMESTAMP (outbuf) = src->timestamp_offset + src->running_time; GST_BUFFER_OFFSET (outbuf) = src->n_frames; src->n_frames++; GST_BUFFER_OFFSET_END (outbuf) = src->n_frames; if (src->rate_numerator) { next_time = gst_util_uint64_scale_int (src->n_frames * GST_SECOND, src->rate_denominator, src->rate_numerator); GST_BUFFER_DURATION (outbuf) = next_time - src->running_time; } else { next_time = src->timestamp_offset; /* NONE means forever */ GST_BUFFER_DURATION (outbuf) = GST_CLOCK_TIME_NONE; } src->running_time = next_time; *buffer = outbuf; return GST_FLOW_OK; not_negotiated: { GST_ELEMENT_ERROR (src, CORE, NEGOTIATION, (NULL), ("format wasn't negotiated before get function")); return GST_FLOW_NOT_NEGOTIATED; } eos: { GST_DEBUG_OBJECT (src, "eos: 0 framerate, frame %d", (gint) src->n_frames); return GST_FLOW_UNEXPECTED; } no_buffer: { GST_DEBUG_OBJECT (src, "could not allocate buffer, reason %s", gst_flow_get_name (res)); return res; } }
static GstFlowReturn gst_video_test_src_fill (GstPushSrc * psrc, GstBuffer * buffer) { GstVideoTestSrc *src; GstClockTime next_time; GstVideoFrame frame; gconstpointer pal; gsize palsize; src = GST_VIDEO_TEST_SRC (psrc); if (G_UNLIKELY (GST_VIDEO_INFO_FORMAT (&src->info) == GST_VIDEO_FORMAT_UNKNOWN)) goto not_negotiated; /* 0 framerate and we are at the second frame, eos */ if (G_UNLIKELY (src->info.fps_n == 0 && src->n_frames == 1)) goto eos; GST_LOG_OBJECT (src, "creating buffer from pool for frame %d", (gint) src->n_frames); if (!gst_video_frame_map (&frame, &src->info, buffer, GST_MAP_WRITE)) goto invalid_frame; src->make_image (src, &frame); if ((pal = gst_video_format_get_palette (GST_VIDEO_FRAME_FORMAT (&frame), &palsize))) { memcpy (GST_VIDEO_FRAME_PLANE_DATA (&frame, 1), pal, palsize); } gst_video_frame_unmap (&frame); GST_BUFFER_DTS (buffer) = src->accum_rtime + src->timestamp_offset + src->running_time; GST_BUFFER_PTS (buffer) = GST_BUFFER_DTS (buffer); GST_DEBUG_OBJECT (src, "Timestamp: %" GST_TIME_FORMAT " = accumulated %" GST_TIME_FORMAT " + offset: %" GST_TIME_FORMAT " + running time: %" GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_PTS (buffer)), GST_TIME_ARGS (src->accum_rtime), GST_TIME_ARGS (src->timestamp_offset), GST_TIME_ARGS (src->running_time)); GST_BUFFER_OFFSET (buffer) = src->accum_frames + src->n_frames; src->n_frames++; GST_BUFFER_OFFSET_END (buffer) = GST_BUFFER_OFFSET (buffer) + 1; if (src->info.fps_n) { next_time = gst_util_uint64_scale_int (src->n_frames * GST_SECOND, src->info.fps_d, src->info.fps_n); GST_BUFFER_DURATION (buffer) = next_time - src->running_time; } else { next_time = src->timestamp_offset; /* NONE means forever */ GST_BUFFER_DURATION (buffer) = GST_CLOCK_TIME_NONE; } src->running_time = next_time; return GST_FLOW_OK; not_negotiated: { GST_ELEMENT_ERROR (src, CORE, NEGOTIATION, (NULL), ("format wasn't negotiated before get function")); return GST_FLOW_NOT_NEGOTIATED; } eos: { GST_DEBUG_OBJECT (src, "eos: 0 framerate, frame %d", (gint) src->n_frames); return GST_FLOW_EOS; } invalid_frame: { GST_DEBUG_OBJECT (src, "invalid frame"); return GST_FLOW_OK; } }