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gstreamer/subprojects/gst-plugins-bad/tests/examples/codecparsers/parse-jpeg.c

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/* GStreamer JPEG parser test utility
* Copyright (C) 2015 Tim-Philipp Müller <tim@centricular.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 <gst/gst.h>
#include <gst/codecparsers/gstjpegparser.h>
#include <stdlib.h>
static GstBuffer *app_segments[16]; /* NULL */
static const gchar *
get_marker_name (guint8 marker)
{
switch (marker) {
case GST_JPEG_MARKER_SOF0:
return "SOF (Baseline)";
case GST_JPEG_MARKER_SOF1:
return "SOF (Extended Sequential, Huffman)";
case GST_JPEG_MARKER_SOF2:
return "SOF (Extended Progressive, Huffman)";
case GST_JPEG_MARKER_SOF3:
return "SOF (Lossless, Huffman)";
case GST_JPEG_MARKER_SOF5:
return "SOF (Differential Sequential, Huffman)";
case GST_JPEG_MARKER_SOF6:
return "SOF (Differential Progressive, Huffman)";
case GST_JPEG_MARKER_SOF7:
return "SOF (Differential Lossless, Huffman)";
case GST_JPEG_MARKER_SOF9:
return "SOF (Extended Sequential, Arithmetic)";
case GST_JPEG_MARKER_SOF10:
return "SOF (Progressive, Arithmetic)";
case GST_JPEG_MARKER_SOF11:
return "SOF (Lossless, Arithmetic)";
case GST_JPEG_MARKER_SOF13:
return "SOF (Differential Sequential, Arithmetic)";
case GST_JPEG_MARKER_SOF14:
return "SOF (Differential Progressive, Arithmetic)";
case GST_JPEG_MARKER_SOF15:
return "SOF (Differential Lossless, Arithmetic)";
case GST_JPEG_MARKER_DHT:
return "DHT";
case GST_JPEG_MARKER_DAC:
return "DAC";
case GST_JPEG_MARKER_SOI:
return "SOI";
case GST_JPEG_MARKER_EOI:
return "EOI";
case GST_JPEG_MARKER_SOS:
return "SOS";
case GST_JPEG_MARKER_DQT:
return "DQT";
case GST_JPEG_MARKER_DNL:
return "DNL";
case GST_JPEG_MARKER_DRI:
return "DRI";
case GST_JPEG_MARKER_APP0:
return "APP0";
case GST_JPEG_MARKER_APP1:
return "APP1";
case GST_JPEG_MARKER_APP2:
return "APP2";
case GST_JPEG_MARKER_APP3:
return "APP3";
case GST_JPEG_MARKER_APP4:
return "APP4";
case GST_JPEG_MARKER_APP5:
return "APP5";
case GST_JPEG_MARKER_APP6:
return "APP6";
case GST_JPEG_MARKER_APP7:
return "APP7";
case GST_JPEG_MARKER_APP8:
return "APP8";
case GST_JPEG_MARKER_APP9:
return "APP9";
case GST_JPEG_MARKER_APP10:
return "APP10";
case GST_JPEG_MARKER_APP11:
return "APP11";
case GST_JPEG_MARKER_APP12:
return "APP12";
case GST_JPEG_MARKER_APP13:
return "APP13";
case GST_JPEG_MARKER_APP14:
return "APP14";
case GST_JPEG_MARKER_APP15:
return "APP15";
case GST_JPEG_MARKER_COM:
return "COM";
default:
if (marker > GST_JPEG_MARKER_RST_MIN && marker < GST_JPEG_MARKER_RST_MAX)
return "RST";
break;
}
return "???";
}
static gboolean
parse_jpeg_segment (GstJpegSegment * segment)
{
switch (segment->marker) {
case GST_JPEG_MARKER_SOF0:
case GST_JPEG_MARKER_SOF1:
case GST_JPEG_MARKER_SOF2:
case GST_JPEG_MARKER_SOF3:
case GST_JPEG_MARKER_SOF9:
case GST_JPEG_MARKER_SOF10:
case GST_JPEG_MARKER_SOF11:{
GstJpegFrameHdr hdr;
int i;
if (!gst_jpeg_segment_parse_frame_header (segment, &hdr)) {
g_printerr ("Failed to parse frame header!\n");
return FALSE;
}
g_print ("\t\twidth x height = %u x %u\n", hdr.width, hdr.height);
g_print ("\t\tsample precision = %u\n", hdr.sample_precision);
g_print ("\t\tnum components = %u\n", hdr.num_components);
for (i = 0; i < hdr.num_components; ++i) {
g_print ("\t\t%d: id=%d, h=%d, v=%d, qts=%d\n", i,
hdr.components[i].identifier, hdr.components[i].horizontal_factor,
hdr.components[i].vertical_factor,
hdr.components[i].quant_table_selector);
}
break;
}
case GST_JPEG_MARKER_DHT:{
GstJpegHuffmanTables ht;
if (!gst_jpeg_segment_parse_huffman_table (segment, &ht)) {
g_printerr ("Failed to parse huffman table!\n");
return FALSE;
}
break;
}
case GST_JPEG_MARKER_DQT:{
GstJpegQuantTables qt;
if (!gst_jpeg_segment_parse_quantization_table (segment, &qt)) {
g_printerr ("Failed to parse quantization table!\n");
return FALSE;
}
break;
}
case GST_JPEG_MARKER_SOS:{
GstJpegScanHdr hdr;
int i;
if (!gst_jpeg_segment_parse_scan_header (segment, &hdr)) {
g_printerr ("Failed to parse scan header!\n");
return FALSE;
}
g_print ("\t\tnum components = %u\n", hdr.num_components);
for (i = 0; i < hdr.num_components; ++i) {
g_print ("\t\t %d: cs=%d, dcs=%d, acs=%d\n", i,
hdr.components[i].component_selector,
hdr.components[i].dc_selector, hdr.components[i].ac_selector);
}
}
case GST_JPEG_MARKER_COM:
/* gst_util_dump_mem (segment->data + segment->offset, segment->size); */
break;
default:
if (segment->marker >= GST_JPEG_MARKER_APP_MIN
&& segment->marker <= GST_JPEG_MARKER_APP_MAX) {
guint n = segment->marker - GST_JPEG_MARKER_APP_MIN;
if (app_segments[n] == NULL)
app_segments[n] = gst_buffer_new ();
gst_buffer_append_memory (app_segments[n],
gst_memory_new_wrapped (GST_MEMORY_FLAG_READONLY,
(guint8 *) segment->data + segment->offset,
segment->size, 0, segment->size, NULL, NULL));
}
break;
}
return TRUE;
}
static void
parse_jpeg (const guint8 * data, gsize size)
{
GstJpegSegment segment;
guint offset = 0;
while (gst_jpeg_parse (&segment, data, size, offset)) {
if (segment.offset > offset + 2)
g_print (" skipped %u bytes\n", (guint) segment.offset - offset - 2);
g_print ("%6d bytes at offset %-8u : %s\n", (gint) segment.size,
segment.offset, get_marker_name (segment.marker));
if (segment.marker == GST_JPEG_MARKER_EOI)
break;
if (offset + segment.size < size &&
parse_jpeg_segment (&segment) && segment.size >= 0)
offset = segment.offset + segment.size;
else
offset += 2;
};
}
static void
process_file (const gchar * fn)
{
GError *err = NULL;
gchar *data = NULL;
gsize size = 0;
guint i;
g_print ("===============================================================\n");
g_print (" %s\n", fn);
g_print ("===============================================================\n");
if (!g_file_get_contents (fn, &data, &size, &err)) {
g_error ("%s", err->message);
g_clear_error (&err);
return;
}
parse_jpeg ((const guint8 *) data, size);
for (i = 0; i < G_N_ELEMENTS (app_segments); ++i) {
if (app_segments[i] != NULL) {
GstMapInfo map = GST_MAP_INFO_INIT;
/* Could parse/extract tags here */
gst_buffer_map (app_segments[i], &map, GST_MAP_READ);
g_print ("\tAPP%-2u : %u bytes\n", i, (guint) map.size);
gst_util_dump_mem ((guchar *) map.data, MIN (map.size, 16));
gst_buffer_unmap (app_segments[i], &map);
gst_buffer_unref (app_segments[i]);
app_segments[i] = NULL;
}
}
g_free (data);
}
int
main (int argc, gchar ** argv)
{
gchar **filenames = NULL;
GOptionEntry options[] = {
{G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &filenames, NULL},
{NULL}
};
GOptionContext *ctx;
GError *err = NULL;
guint i, num;
gst_init (&argc, &argv);
if (argc == 1) {
g_printerr ("Usage: %s FILE.JPG [FILE2.JPG] [FILE..JPG]\n", argv[0]);
return -1;
}
ctx = g_option_context_new ("JPEG FILES");
g_option_context_add_main_entries (ctx, options, GETTEXT_PACKAGE);
g_option_context_add_group (ctx, gst_init_get_option_group ());
if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
g_print ("Error initializing: %s\n", GST_STR_NULL (err->message));
g_option_context_free (ctx);
g_clear_error (&err);
exit (1);
}
g_option_context_free (ctx);
if (filenames == NULL || *filenames == NULL) {
g_printerr ("Please provide one or more filenames.");
return 1;
}
num = g_strv_length (filenames);
for (i = 0; i < num; ++i) {
process_file (filenames[i]);
}
g_strfreev (filenames);
return 0;
}
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