/* GStreamer PNM encoder * Copyright (C) 2009 Lutz Mueller <lutz@users.sourceforge.net> * * 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. */ /** * SECTION:element-pnmenc * @title: pnmenc * * Encodes pnm images. This plugin supports both raw and ASCII encoding. * To enable ASCII encoding, set the parameter ascii to TRUE. If you omit * the parameter or set it to FALSE, the output will be raw encoded. * * ## Example launch line * |[ * gst-launch-1.0 videotestsrc num_buffers=1 ! videoconvert ! "video/x-raw,format=GRAY8" ! pnmenc ascii=true ! filesink location=test.pnm * ]| The above pipeline writes a test pnm file (ASCII encoding). * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "gstpnmenc.h" #include "gstpnmutils.h" #include <gst/gstutils.h> #include <gst/video/video.h> #include <gst/video/gstvideometa.h> #include <stdio.h> #include <string.h> enum { GST_PNMENC_PROP_0, GST_PNMENC_PROP_ASCII /* Add here. */ }; static GstStaticPadTemplate sink_pad_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGB, GRAY8, GRAY16_BE, GRAY16_LE }"))); static GstStaticPadTemplate src_pad_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS (MIME_ALL)); G_DEFINE_TYPE (GstPnmenc, gst_pnmenc, GST_TYPE_VIDEO_ENCODER); #define parent_class gst_pnmenc_parent_class static GstFlowReturn gst_pnmenc_handle_frame (GstVideoEncoder * encoder, GstVideoCodecFrame * frame); static void gst_pnmenc_finalize (GObject * object); static void gst_pnmenc_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstPnmenc *s = GST_PNMENC (object); switch (prop_id) { case GST_PNMENC_PROP_ASCII: if (g_value_get_boolean (value)) { s->info.encoding = GST_PNM_ENCODING_ASCII; } else { s->info.encoding = GST_PNM_ENCODING_RAW; } s->info.fields |= GST_PNM_INFO_FIELDS_ENCODING; break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_pnmenc_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstPnmenc *s = GST_PNMENC (object); switch (prop_id) { case GST_PNMENC_PROP_ASCII: g_value_set_boolean (value, s->info.encoding == GST_PNM_ENCODING_ASCII); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_pnmenc_init (GstPnmenc * s) { GST_PAD_SET_ACCEPT_TEMPLATE (GST_VIDEO_ENCODER_SINK_PAD (s)); /* Set default encoding as RAW as ASCII takes up 4 time more bytes */ s->info.encoding = GST_PNM_ENCODING_RAW; } static void gst_pnmenc_finalize (GObject * object) { GstPnmenc *pnmenc = GST_PNMENC (object); if (pnmenc->input_state) gst_video_codec_state_unref (pnmenc->input_state); G_OBJECT_CLASS (parent_class)->finalize (object); } static gboolean gst_pnmenc_set_format (GstVideoEncoder * encoder, GstVideoCodecState * state) { GstPnmenc *pnmenc; gboolean ret = TRUE; GstVideoInfo *info; GstVideoCodecState *output_state; const gchar *mime_type = NULL; pnmenc = GST_PNMENC (encoder); info = &state->info; switch (GST_VIDEO_INFO_FORMAT (info)) { case GST_VIDEO_FORMAT_RGB: pnmenc->info.max = 255; pnmenc->info.type = GST_PNM_TYPE_PIXMAP; mime_type = MIME_PM; break; case GST_VIDEO_FORMAT_GRAY8: pnmenc->info.max = 255; pnmenc->info.type = GST_PNM_TYPE_GRAYMAP; mime_type = MIME_GM; break; case GST_VIDEO_FORMAT_GRAY16_BE: case GST_VIDEO_FORMAT_GRAY16_LE: pnmenc->info.max = 65535; pnmenc->info.type = GST_PNM_TYPE_GRAYMAP; mime_type = MIME_GM; break; default: ret = FALSE; goto done; } pnmenc->info.width = GST_VIDEO_INFO_WIDTH (info); pnmenc->info.height = GST_VIDEO_INFO_HEIGHT (info); if (pnmenc->input_state) gst_video_codec_state_unref (pnmenc->input_state); pnmenc->input_state = gst_video_codec_state_ref (state); output_state = gst_video_encoder_set_output_state (encoder, gst_caps_new_empty_simple (mime_type), state); gst_video_codec_state_unref (output_state); done: return ret; } static GstFlowReturn gst_pnmenc_handle_frame (GstVideoEncoder * encoder, GstVideoCodecFrame * frame) { GstPnmenc *pnmenc; guint size, pixels, bytesize; GstMapInfo omap; gchar *header = NULL; GstVideoInfo *info; GstFlowReturn ret = GST_FLOW_OK; guint i_rowstride, o_rowstride; guint bytes = 0, index, head_size; guint i, j; guint maxbytes_per_pixel, str_len; gchar format_str[4]; GstVideoFrame in_frame; pnmenc = GST_PNMENC (encoder); info = &pnmenc->input_state->info; switch (GST_VIDEO_INFO_FORMAT (info)) { case GST_VIDEO_FORMAT_RGB: pixels = size = pnmenc->info.width * pnmenc->info.height * 3; bytesize = 1; maxbytes_per_pixel = 4; str_len = 3; g_strlcpy (format_str, "%3i", 4); break; case GST_VIDEO_FORMAT_GRAY8: pixels = size = pnmenc->info.width * pnmenc->info.height * 1; bytesize = 1; maxbytes_per_pixel = 4; str_len = 3; g_strlcpy (format_str, "%3i", 4); break; case GST_VIDEO_FORMAT_GRAY16_LE: case GST_VIDEO_FORMAT_GRAY16_BE: pixels = pnmenc->info.width * pnmenc->info.height * 1; bytesize = 2; size = pixels * bytesize; maxbytes_per_pixel = 6; str_len = 5; g_strlcpy (format_str, "%5i", 4); break; default: ret = FALSE; goto done; } header = g_strdup_printf ("P%i\n%i %i\n%i\n", pnmenc->info.type + 3 * (1 - pnmenc->info.encoding), pnmenc->info.width, pnmenc->info.height, pnmenc->info.max); if (pnmenc->info.encoding == GST_PNM_ENCODING_ASCII) { /* Per component 4 bytes are used in case of ASCII encoding */ size = size * 4 + size / 20; size += strlen (header); frame->output_buffer = gst_video_encoder_allocate_output_buffer (encoder, (size)); } else { size += strlen (header); frame->output_buffer = gst_video_encoder_allocate_output_buffer (encoder, size); } if (gst_buffer_map (frame->output_buffer, &omap, GST_MAP_WRITE) == FALSE) { ret = GST_FLOW_ERROR; goto done; } if (!gst_video_frame_map (&in_frame, &(pnmenc->input_state->info), frame->input_buffer, GST_MAP_READ)) { /* Unmap already mapped buffer */ gst_buffer_unmap (frame->output_buffer, &omap); ret = GST_FLOW_ERROR; goto done; } /* Copy out the header first */ head_size = strlen (header); memcpy (omap.data, header, head_size); if (pnmenc->info.encoding == GST_PNM_ENCODING_ASCII) { /* We need to convert to ASCII */ /* Convert from gstreamer rowstride to PNM rowstride as we go */ if (pnmenc->info.type == GST_PNM_TYPE_PIXMAP) { o_rowstride = 3 * pnmenc->info.width; } else { o_rowstride = pnmenc->info.width; } i_rowstride = GST_VIDEO_FRAME_PLANE_STRIDE (&in_frame, 0); switch (GST_VIDEO_INFO_FORMAT (info)) { case GST_VIDEO_FORMAT_RGB: case GST_VIDEO_FORMAT_GRAY8: for (i = 0; i < pnmenc->info.height; i++) { index = i * i_rowstride; for (j = 0; j < o_rowstride; j++, bytes++, index++) { g_snprintf ((char *) omap.data + head_size, maxbytes_per_pixel, format_str, in_frame.map[0].data[index]); head_size += str_len; omap.data[head_size++] = ' '; /* Add new line so that file will not end up with single big line */ if (!((bytes + 1) % 20)) omap.data[head_size++] = '\n'; } } break; case GST_VIDEO_FORMAT_GRAY16_BE: for (i = 0; i < pnmenc->info.height; i++) { index = i * i_rowstride; for (j = 0; j < o_rowstride; j++, bytes++, index += 2) { g_snprintf ((char *) omap.data + head_size, maxbytes_per_pixel, format_str, GST_READ_UINT16_BE (in_frame.map[0].data + index)); head_size += str_len; omap.data[head_size++] = ' '; /* Add new line so that file will not end up with single big line */ if (!((bytes + 1) % 20)) omap.data[head_size++] = '\n'; } } break; case GST_VIDEO_FORMAT_GRAY16_LE: for (i = 0; i < pnmenc->info.height; i++) { index = i * i_rowstride; for (j = 0; j < o_rowstride; j++, bytes++, index += 2) { g_snprintf ((char *) omap.data + head_size, maxbytes_per_pixel, format_str, GST_READ_UINT16_LE (in_frame.map[0].data + index)); head_size += str_len; omap.data[head_size++] = ' '; /* Add new line so that file will not end up with single big line */ if (!((bytes + 1) % 20)) omap.data[head_size++] = '\n'; } } break; default: GST_ERROR_OBJECT (encoder, "Unhandled format %s", gst_video_format_to_string (GST_VIDEO_INFO_FORMAT (info))); gst_buffer_unmap (frame->output_buffer, &omap); gst_video_frame_unmap (&in_frame); g_free (header); return GST_FLOW_ERROR; } gst_buffer_set_size (frame->output_buffer, head_size); } else { guint out_index = head_size; /* Binary output. 8-bit, or 16-bit BE */ if (pnmenc->info.type == GST_PNM_TYPE_PIXMAP) { o_rowstride = 3 * pnmenc->info.width * bytesize; } else { o_rowstride = pnmenc->info.width * bytesize; } i_rowstride = GST_VIDEO_FRAME_PLANE_STRIDE (&in_frame, 0); switch (GST_VIDEO_INFO_FORMAT (info)) { case GST_VIDEO_FORMAT_GRAY16_BE: for (i = 0; i < pnmenc->info.height; i++) { index = i * i_rowstride; for (j = 0; j < o_rowstride; j += 2, index += 2) { guint16 val = GST_READ_UINT16_LE (in_frame.map[0].data + index); GST_WRITE_UINT16_BE (omap.data + out_index, val); out_index += 2; } } break; case GST_VIDEO_FORMAT_GRAY16_LE: for (i = 0; i < pnmenc->info.height; i++) { index = i * i_rowstride; for (j = 0; j < o_rowstride; j += 2, index += 2) { guint16 val = GST_READ_UINT16_LE (in_frame.map[0].data + index); GST_WRITE_UINT16_BE (omap.data + out_index, val); out_index += 2; } } break; default: for (i = 0; i < pnmenc->info.height; i++) { memcpy (omap.data + head_size + o_rowstride * i, in_frame.map[0].data + i_rowstride * i, o_rowstride); } } } gst_buffer_unmap (frame->output_buffer, &omap); gst_video_frame_unmap (&in_frame); if ((ret = gst_video_encoder_finish_frame (encoder, frame)) != GST_FLOW_OK) goto done; done: g_free (header); return ret; } static void gst_pnmenc_class_init (GstPnmencClass * klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); GstElementClass *element_class = GST_ELEMENT_CLASS (klass); GstVideoEncoderClass *venc_class = (GstVideoEncoderClass *) klass; parent_class = g_type_class_peek_parent (klass); gobject_class->set_property = gst_pnmenc_set_property; gobject_class->get_property = gst_pnmenc_get_property; g_object_class_install_property (gobject_class, GST_PNMENC_PROP_ASCII, g_param_spec_boolean ("ascii", "ASCII Encoding", "The output will be " "ASCII encoded", FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gst_element_class_add_static_pad_template (element_class, &sink_pad_template); gst_element_class_add_static_pad_template (element_class, &src_pad_template); gst_element_class_set_static_metadata (element_class, "PNM image encoder", "Codec/Encoder/Image", "Encodes images into portable pixmap or graymap (PNM) format", "Lutz Mueller <lutz@users.sourceforge.net>"); venc_class->set_format = gst_pnmenc_set_format; venc_class->handle_frame = gst_pnmenc_handle_frame; gobject_class->finalize = gst_pnmenc_finalize; }