mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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pnmenc: Port PNM Encoder to use GstVideoEncoder Class
https://bugzilla.gnome.org/show_bug.cgi?id=731943
This commit is contained in:
Sanjay NM
Thiago Santos
parent
15a2da8ba7
commit
00b33e2068
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@ -32,10 +32,6 @@
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* </refsect2>
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*/
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/*
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* FIXME: Port to GstVideoEncoder
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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@ -45,6 +41,8 @@
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#include <gst/gstutils.h>
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#include <gst/video/video.h>
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#include <gst/video/gstvideometa.h>
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#include <stdio.h>
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#include <string.h>
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@ -65,7 +63,13 @@ static GstStaticPadTemplate src_pad_template =
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GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
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GST_STATIC_CAPS (MIME_ALL));
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G_DEFINE_TYPE (GstPnmenc, gst_pnmenc, GST_TYPE_ELEMENT);
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G_DEFINE_TYPE (GstPnmenc, gst_pnmenc, GST_TYPE_VIDEO_ENCODER);
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#define parent_class gst_pnmenc_parent_class
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static GstFlowReturn
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gst_pnmenc_handle_frame (GstVideoEncoder * encoder, GstVideoCodecFrame * frame);
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static void gst_pnmenc_finalize (GObject * object);
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static void
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gst_pnmenc_set_property (GObject * object, guint prop_id, const GValue * value,
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@ -75,10 +79,11 @@ gst_pnmenc_set_property (GObject * object, guint prop_id, const GValue * value,
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switch (prop_id) {
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case GST_PNMENC_PROP_ASCII:
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if (g_value_get_boolean (value))
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if (g_value_get_boolean (value)) {
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s->info.encoding = GST_PNM_ENCODING_ASCII;
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else
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} else {
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s->info.encoding = GST_PNM_ENCODING_RAW;
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}
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s->info.fields |= GST_PNM_INFO_FIELDS_ENCODING;
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break;
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default:
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@ -103,161 +108,181 @@ gst_pnmenc_get_property (GObject * object, guint prop_id, GValue * value,
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}
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}
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static GstFlowReturn
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gst_pnmenc_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
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{
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GstPnmenc *s = GST_PNMENC (parent);
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GstFlowReturn r;
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gchar *header;
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GstBuffer *out;
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if (s->info.width == 0 || s->info.height == 0 || s->info.fields == 0)
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goto not_negotiated;
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/* Assumption: One buffer, one image. That is, always first write header. */
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header = g_strdup_printf ("P%i\n%i %i\n%i\n",
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s->info.type + 3 * (1 - s->info.encoding), s->info.width, s->info.height,
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s->info.max);
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out = gst_buffer_new_wrapped (header, strlen (header));
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if ((r = gst_pad_push (s->src, out)) != GST_FLOW_OK)
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goto out;
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/* Need to convert from GStreamer rowstride to PNM rowstride */
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if (s->info.width % 4 != 0) {
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guint i_rowstride;
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guint o_rowstride;
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GstBuffer *obuf;
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guint i;
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GstMapInfo imap, omap;
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if (s->info.type == GST_PNM_TYPE_PIXMAP) {
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o_rowstride = 3 * s->info.width;
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i_rowstride = GST_ROUND_UP_4 (o_rowstride);
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} else {
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o_rowstride = s->info.width;
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i_rowstride = GST_ROUND_UP_4 (o_rowstride);
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}
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obuf = gst_buffer_new_and_alloc (o_rowstride * s->info.height);
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gst_buffer_map (obuf, &omap, GST_MAP_WRITE);
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gst_buffer_map (buf, &imap, GST_MAP_READ);
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for (i = 0; i < s->info.height; i++)
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memcpy (omap.data + o_rowstride * i, imap.data + i_rowstride * i,
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o_rowstride);
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gst_buffer_unmap (buf, &imap);
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gst_buffer_unmap (obuf, &omap);
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gst_buffer_unref (buf);
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buf = obuf;
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} else {
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/* Pass through the data. */
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buf = gst_buffer_make_writable (buf);
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}
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/* We might need to convert to ASCII... */
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if (s->info.encoding == GST_PNM_ENCODING_ASCII) {
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GstBuffer *obuf;
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guint i, o;
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GstMapInfo imap, omap;
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gst_buffer_map (buf, &imap, GST_MAP_READ);
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obuf = gst_buffer_new_and_alloc (imap.size * (4 + 1 / 20.));
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gst_buffer_map (obuf, &omap, GST_MAP_WRITE);
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for (i = o = 0; i < imap.size; i++) {
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g_snprintf ((char *) omap.data + o, 4, "%3i", imap.data[i]);
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o += 3;
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omap.data[o++] = ' ';
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if (!((i + 1) % 20))
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omap.data[o++] = '\n';
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}
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gst_buffer_unmap (buf, &imap);
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gst_buffer_unmap (obuf, &omap);
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gst_buffer_unref (buf);
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buf = obuf;
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}
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r = gst_pad_push (s->src, buf);
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out:
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return r;
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not_negotiated:
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{
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gst_buffer_unref (buf);
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return GST_FLOW_NOT_NEGOTIATED;
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}
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}
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static gboolean
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gst_pnmenc_setcaps (GstPnmenc * s, GstCaps * caps)
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{
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gboolean r;
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GstCaps *srccaps;
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s->info.max = 255;
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s->info.fields = GST_PNM_INFO_FIELDS_MAX;
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if (!gst_video_info_from_caps (&s->vinfo, caps))
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return FALSE;
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if (GST_VIDEO_INFO_IS_RGB (&s->vinfo)) {
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s->info.type = GST_PNM_TYPE_PIXMAP;
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srccaps = gst_caps_from_string (MIME_PM);
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} else if (GST_VIDEO_INFO_IS_GRAY (&s->vinfo)) {
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s->info.type = GST_PNM_TYPE_GRAYMAP;
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srccaps = gst_caps_from_string (MIME_GM);
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} else {
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return FALSE;
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}
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r = gst_pad_set_caps (s->src, srccaps);
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gst_caps_unref (srccaps);
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s->info.fields |= GST_PNM_INFO_FIELDS_TYPE;
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/* Remember width and height of the input data. */
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s->info.width = GST_VIDEO_INFO_WIDTH (&s->vinfo);
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s->info.height = GST_VIDEO_INFO_HEIGHT (&s->vinfo);
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s->info.fields |= GST_PNM_INFO_FIELDS_WIDTH | GST_PNM_INFO_FIELDS_HEIGHT;
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return r;
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}
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static gboolean
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gst_pnmenc_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
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{
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GstPnmenc *s = GST_PNMENC (parent);
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gboolean r = FALSE;
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_CAPS:
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{
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GstCaps *caps;
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gst_event_parse_caps (event, &caps);
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r = gst_pnmenc_setcaps (s, caps);
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gst_event_unref (event);
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break;
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}
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default:
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r = gst_pad_event_default (pad, parent, event);
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break;
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}
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return r;
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}
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static void
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gst_pnmenc_init (GstPnmenc * s)
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{
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GstPad *pad;
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/* Set default encoding as RAW as ASCII takes up 4 time more bytes */
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s->info.encoding = GST_PNM_ENCODING_RAW;
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}
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pad = gst_pad_new_from_static_template (&sink_pad_template, "sink");
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gst_pad_set_chain_function (pad, gst_pnmenc_chain);
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gst_pad_set_event_function (pad, gst_pnmenc_sink_event);
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gst_pad_use_fixed_caps (pad);
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gst_element_add_pad (GST_ELEMENT (s), pad);
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static void
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gst_pnmenc_finalize (GObject * object)
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{
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GstPnmenc *pnmenc = GST_PNMENC (object);
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if (pnmenc->input_state)
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gst_video_codec_state_unref (pnmenc->input_state);
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s->src = gst_pad_new_from_static_template (&src_pad_template, "src");
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gst_element_add_pad (GST_ELEMENT (s), s->src);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static gboolean
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gst_pnmenc_set_format (GstVideoEncoder * encoder, GstVideoCodecState * state)
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{
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GstPnmenc *pnmenc;
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gboolean ret = TRUE;
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GstVideoInfo *info;
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GstVideoCodecState *output_state;
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pnmenc = GST_PNMENC (encoder);
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info = &state->info;
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switch (GST_VIDEO_INFO_FORMAT (info)) {
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case GST_VIDEO_FORMAT_RGB:
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pnmenc->info.type = GST_PNM_TYPE_PIXMAP;
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break;
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case GST_VIDEO_FORMAT_GRAY8:
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pnmenc->info.type = GST_PNM_TYPE_GRAYMAP;
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break;
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default:
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ret = FALSE;
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goto done;
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}
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pnmenc->info.width = GST_VIDEO_INFO_WIDTH (info);
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pnmenc->info.height = GST_VIDEO_INFO_HEIGHT (info);
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/* Supported max value is only one, that is 255 */
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pnmenc->info.max = 255;
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if (pnmenc->input_state)
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gst_video_codec_state_unref (pnmenc->input_state);
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pnmenc->input_state = gst_video_codec_state_ref (state);
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output_state =
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gst_video_encoder_set_output_state (encoder,
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gst_caps_new_empty_simple ("image/pnm"), state);
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gst_video_codec_state_unref (output_state);
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done:
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return ret;
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}
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static GstFlowReturn
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gst_pnmenc_handle_frame (GstVideoEncoder * encoder, GstVideoCodecFrame * frame)
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{
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GstPnmenc *pnmenc;
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guint size, pixels;
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GstMapInfo omap, imap;
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gchar *header;
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GstVideoInfo *info;
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GstFlowReturn ret = GST_FLOW_OK;
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guint i_rowstride, o_rowstride;
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guint bytes = 0, index, head_size;
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guint i, j;
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pnmenc = GST_PNMENC (encoder);
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info = &pnmenc->input_state->info;
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switch (GST_VIDEO_INFO_FORMAT (info)) {
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case GST_VIDEO_FORMAT_RGB:
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pixels = size = pnmenc->info.width * pnmenc->info.height * 3;
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break;
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case GST_VIDEO_FORMAT_GRAY8:
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pixels = size = pnmenc->info.width * pnmenc->info.height * 1;
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break;
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default:
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ret = FALSE;
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goto done;
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}
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header = g_strdup_printf ("P%i\n%i %i\n%i\n",
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pnmenc->info.type + 3 * (1 - pnmenc->info.encoding), pnmenc->info.width,
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pnmenc->info.height, pnmenc->info.max);
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if (pnmenc->info.encoding == GST_PNM_ENCODING_ASCII) {
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/* Per component 4 bytes are used in case of ASCII encoding */
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size = size * 4;
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size += strlen (header);
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frame->output_buffer =
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gst_video_encoder_allocate_output_buffer (encoder, (size + size / 20));
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} else {
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size += strlen (header);
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frame->output_buffer =
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gst_video_encoder_allocate_output_buffer (encoder, size);
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}
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if (gst_buffer_map (frame->output_buffer, &omap, GST_MAP_WRITE) == FALSE) {
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ret = GST_FLOW_ERROR;
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goto done;
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}
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if (gst_buffer_map (frame->input_buffer, &imap, GST_MAP_READ) == FALSE) {
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/* Unmap already mapped buffer */
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gst_buffer_unmap (frame->output_buffer, &omap);
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ret = GST_FLOW_ERROR;
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goto done;
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}
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memcpy (omap.data, header, strlen (header));
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head_size = strlen (header);
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if (pnmenc->info.encoding == GST_PNM_ENCODING_ASCII) {
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/* We need to convert to ASCII */
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if (pnmenc->info.width % 4 != 0) {
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/* Convert from gstreamer rowstride to PNM rowstride */
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if (pnmenc->info.type == GST_PNM_TYPE_PIXMAP) {
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o_rowstride = 3 * pnmenc->info.width;
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} else {
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o_rowstride = pnmenc->info.width;
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}
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i_rowstride = GST_VIDEO_FRAME_COMP_STRIDE (pnmenc->input_state, 0);
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for (i = 0; i < pnmenc->info.height; i++) {
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index = i * i_rowstride;
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for (j = 0; j < o_rowstride; j++, bytes++, index++) {
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g_snprintf ((char *) omap.data + head_size, 4, "%3i",
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imap.data[index]);
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head_size += 3;
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omap.data[head_size++] = ' ';
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/* Add new line so that file will not end up with sinle big line */
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if (!((bytes + 1) % 20))
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omap.data[head_size++] = '\n';
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}
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}
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} else {
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for (i = 0; i < pixels; i++) {
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g_snprintf ((char *) omap.data + head_size, 4, "%3i", imap.data[i]);
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head_size += 3;
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omap.data[head_size++] = ' ';
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if (!((i + 1) % 20))
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omap.data[head_size++] = '\n';
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}
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}
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} else {
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/* Need to convert from GStreamer rowstride to PNM rowstride */
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if (pnmenc->info.width % 4 != 0) {
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if (pnmenc->info.type == GST_PNM_TYPE_PIXMAP) {
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o_rowstride = 3 * pnmenc->info.width;
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} else {
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o_rowstride = pnmenc->info.width;
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}
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i_rowstride = GST_VIDEO_FRAME_COMP_STRIDE (pnmenc->input_state, 0);
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for (i = 0; i < pnmenc->info.height; i++)
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memcpy (omap.data + head_size + o_rowstride * i,
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imap.data + i_rowstride * i, o_rowstride);
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} else {
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/* size contains complete image size inlcuding header size,
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Exclude header size while copying data */
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memcpy (omap.data + strlen (header), imap.data, (size - head_size));
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}
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}
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gst_buffer_unmap (frame->output_buffer, &omap);
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gst_buffer_unmap (frame->input_buffer, &imap);
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if ((ret = gst_video_encoder_finish_frame (encoder, frame)) != GST_FLOW_OK)
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goto done;
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done:
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return ret;
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}
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static void
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@ -265,20 +290,28 @@ gst_pnmenc_class_init (GstPnmencClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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GstVideoEncoderClass *venc_class = (GstVideoEncoderClass *) klass;
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&sink_pad_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_pad_template));
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gst_element_class_set_static_metadata (element_class, "PNM image encoder",
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"Codec/Encoder/Image",
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"Encodes images into portable pixmap or graymap (PNM) format",
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"Lutz Mueller <lutz@users.sourceforge.net>");
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parent_class = g_type_class_peek_parent (klass);
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gobject_class->set_property = gst_pnmenc_set_property;
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gobject_class->get_property = gst_pnmenc_get_property;
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g_object_class_install_property (gobject_class, GST_PNMENC_PROP_ASCII,
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g_param_spec_boolean ("ascii", "ASCII Encoding", "The output will be "
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"ASCII encoded", FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&sink_pad_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_pad_template));
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gst_element_class_set_static_metadata (element_class, "PNM image encoder",
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"Codec/Encoder/Image",
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"Encodes images into portable pixmap or graymap (PNM) format",
|
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"Lutz Mueller <lutz@users.sourceforge.net>");
|
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venc_class->set_format = gst_pnmenc_set_format;
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venc_class->handle_frame = gst_pnmenc_handle_frame;
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gobject_class->finalize = gst_pnmenc_finalize;
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}
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|
|
|
|||
|
|
@ -38,9 +38,8 @@ typedef struct _GstPnmencClass GstPnmencClass;
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|
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struct _GstPnmenc
|
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{
|
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GstElement element;
|
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|
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GstVideoInfo vinfo;
|
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GstVideoEncoder parent;
|
||||
GstVideoCodecState *input_state;
|
||||
GstPnmInfo info;
|
||||
|
||||
GstPad *src;
|
||||
|
|
@ -48,7 +47,7 @@ struct _GstPnmenc
|
|||
|
||||
struct _GstPnmencClass
|
||||
{
|
||||
GstElementClass parent_class;
|
||||
GstVideoEncoderClass parent;
|
||||
};
|
||||
|
||||
GType gst_pnmenc_get_type (void) G_GNUC_CONST;
|
||||
|
|
|
|||
Loading…
Reference in a new issue