/* GStreamer * Copyright (C) <1999> Erik Walthinsen * * 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "gstjpegdec.h" #include /* elementfactory information */ GstElementDetails gst_jpegdec_details = { "JPEG image decoder", "Codec/Decoder/Image", "Decode images from JPEG format", "Wim Taymans ", }; GST_DEBUG_CATEGORY (jpegdec_debug); #define GST_CAT_DEFAULT jpegdec_debug /* JpegDec signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0 /* FILL ME */ }; static void gst_jpegdec_base_init (gpointer g_class); static void gst_jpegdec_class_init (GstJpegDec * klass); static void gst_jpegdec_init (GstJpegDec * jpegdec); static void gst_jpegdec_chain (GstPad * pad, GstData * _data); static GstPadLinkReturn gst_jpegdec_link (GstPad * pad, const GstCaps * caps); static GstElementClass *parent_class = NULL; /*static guint gst_jpegdec_signals[LAST_SIGNAL] = { 0 }; */ GType gst_jpegdec_get_type (void) { static GType jpegdec_type = 0; if (!jpegdec_type) { static const GTypeInfo jpegdec_info = { sizeof (GstJpegDec), gst_jpegdec_base_init, NULL, (GClassInitFunc) gst_jpegdec_class_init, NULL, NULL, sizeof (GstJpegDec), 0, (GInstanceInitFunc) gst_jpegdec_init, }; jpegdec_type = g_type_register_static (GST_TYPE_ELEMENT, "GstJpegDec", &jpegdec_info, 0); } return jpegdec_type; } static GstStaticPadTemplate gst_jpegdec_src_pad_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420")) ); static GstStaticPadTemplate gst_jpegdec_sink_pad_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("image/jpeg, " "width = (int) [ 16, 4096 ], " "height = (int) [ 16, 4096 ], " "framerate = (double) [ 1, MAX ]") ); static void gst_jpegdec_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_jpegdec_src_pad_template)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_jpegdec_sink_pad_template)); gst_element_class_set_details (element_class, &gst_jpegdec_details); } static void gst_jpegdec_class_init (GstJpegDec * klass) { GstElementClass *gstelement_class; gstelement_class = (GstElementClass *) klass; parent_class = g_type_class_ref (GST_TYPE_ELEMENT); GST_DEBUG_CATEGORY_INIT (jpegdec_debug, "jpegdec", 0, "JPEG decoder"); } static void gst_jpegdec_init_source (j_decompress_ptr cinfo) { GST_DEBUG ("init_source"); } static gboolean gst_jpegdec_fill_input_buffer (j_decompress_ptr cinfo) { GST_DEBUG ("fill_input_buffer"); return TRUE; } static void gst_jpegdec_skip_input_data (j_decompress_ptr cinfo, glong num_bytes) { GST_DEBUG ("skip_input_data"); } static gboolean gst_jpegdec_resync_to_restart (j_decompress_ptr cinfo, gint desired) { GST_DEBUG ("resync_to_start"); return TRUE; } static void gst_jpegdec_term_source (j_decompress_ptr cinfo) { GST_DEBUG ("term_source"); } static void gst_jpegdec_init (GstJpegDec * jpegdec) { GST_DEBUG ("initializing"); /* create the sink and src pads */ jpegdec->sinkpad = gst_pad_new_from_template (gst_static_pad_template_get (&gst_jpegdec_sink_pad_template), "sink"); gst_element_add_pad (GST_ELEMENT (jpegdec), jpegdec->sinkpad); gst_pad_set_chain_function (jpegdec->sinkpad, gst_jpegdec_chain); gst_pad_set_link_function (jpegdec->sinkpad, gst_jpegdec_link); jpegdec->srcpad = gst_pad_new_from_template (gst_static_pad_template_get (&gst_jpegdec_src_pad_template), "src"); gst_pad_use_explicit_caps (jpegdec->srcpad); gst_element_add_pad (GST_ELEMENT (jpegdec), jpegdec->srcpad); /* initialize the jpegdec decoder state */ jpegdec->next_time = 0; /* reset the initial video state */ jpegdec->format = -1; jpegdec->width = -1; jpegdec->height = -1; jpegdec->line[0] = NULL; jpegdec->line[1] = NULL; jpegdec->line[2] = NULL; /* setup jpeglib */ memset (&jpegdec->cinfo, 0, sizeof (jpegdec->cinfo)); memset (&jpegdec->jerr, 0, sizeof (jpegdec->jerr)); jpegdec->cinfo.err = jpeg_std_error (&jpegdec->jerr); jpeg_create_decompress (&jpegdec->cinfo); jpegdec->jsrc.init_source = gst_jpegdec_init_source; jpegdec->jsrc.fill_input_buffer = gst_jpegdec_fill_input_buffer; jpegdec->jsrc.skip_input_data = gst_jpegdec_skip_input_data; jpegdec->jsrc.resync_to_restart = gst_jpegdec_resync_to_restart; jpegdec->jsrc.term_source = gst_jpegdec_term_source; jpegdec->cinfo.src = &jpegdec->jsrc; } static GstPadLinkReturn gst_jpegdec_link (GstPad * pad, const GstCaps * caps) { GstJpegDec *jpegdec = GST_JPEGDEC (gst_pad_get_parent (pad)); GstStructure *structure; GstCaps *srccaps; structure = gst_caps_get_structure (caps, 0); gst_structure_get_double (structure, "framerate", &jpegdec->fps); gst_structure_get_int (structure, "width", &jpegdec->width); gst_structure_get_int (structure, "height", &jpegdec->height); srccaps = gst_caps_new_simple ("video/x-raw-yuv", "format", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('I', '4', '2', '0'), "width", G_TYPE_INT, jpegdec->width, "height", G_TYPE_INT, jpegdec->height, "framerate", G_TYPE_DOUBLE, jpegdec->fps, NULL); /* at this point, we're pretty sure that this will be the output * format, so we'll set it. */ gst_pad_set_explicit_caps (jpegdec->srcpad, srccaps); return GST_PAD_LINK_OK; } /* shamelessly ripped from jpegutils.c in mjpegtools */ static void add_huff_table (j_decompress_ptr dinfo, JHUFF_TBL ** htblptr, const UINT8 * bits, const UINT8 * val) /* Define a Huffman table */ { int nsymbols, len; if (*htblptr == NULL) *htblptr = jpeg_alloc_huff_table ((j_common_ptr) dinfo); /* Copy the number-of-symbols-of-each-code-length counts */ memcpy ((*htblptr)->bits, bits, sizeof ((*htblptr)->bits)); /* Validate the counts. We do this here mainly so we can copy the right * number of symbols from the val[] array, without risking marching off * the end of memory. jchuff.c will do a more thorough test later. */ nsymbols = 0; for (len = 1; len <= 16; len++) nsymbols += bits[len]; if (nsymbols < 1 || nsymbols > 256) g_error ("jpegutils.c: add_huff_table failed badly. "); memcpy ((*htblptr)->huffval, val, nsymbols * sizeof (UINT8)); } static void std_huff_tables (j_decompress_ptr dinfo) /* Set up the standard Huffman tables (cf. JPEG standard section K.3) */ /* IMPORTANT: these are only valid for 8-bit data precision! */ { static const UINT8 bits_dc_luminance[17] = { /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 }; static const UINT8 val_dc_luminance[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; static const UINT8 bits_dc_chrominance[17] = { /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 }; static const UINT8 val_dc_chrominance[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; static const UINT8 bits_ac_luminance[17] = { /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d }; static const UINT8 val_ac_luminance[] = { 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0, 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa }; static const UINT8 bits_ac_chrominance[17] = { /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 }; static const UINT8 val_ac_chrominance[] = { 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0, 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34, 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa }; add_huff_table (dinfo, &dinfo->dc_huff_tbl_ptrs[0], bits_dc_luminance, val_dc_luminance); add_huff_table (dinfo, &dinfo->ac_huff_tbl_ptrs[0], bits_ac_luminance, val_ac_luminance); add_huff_table (dinfo, &dinfo->dc_huff_tbl_ptrs[1], bits_dc_chrominance, val_dc_chrominance); add_huff_table (dinfo, &dinfo->ac_huff_tbl_ptrs[1], bits_ac_chrominance, val_ac_chrominance); } static void guarantee_huff_tables (j_decompress_ptr dinfo) { if ((dinfo->dc_huff_tbl_ptrs[0] == NULL) && (dinfo->dc_huff_tbl_ptrs[1] == NULL) && (dinfo->ac_huff_tbl_ptrs[0] == NULL) && (dinfo->ac_huff_tbl_ptrs[1] == NULL)) { GST_DEBUG ("Generating standard Huffman tables for this frame."); std_huff_tables (dinfo); } } static void gst_jpegdec_chain (GstPad * pad, GstData * _data) { GstBuffer *buf = GST_BUFFER (_data); GstJpegDec *jpegdec; guchar *data, *outdata; gulong size, outsize; GstBuffer *outbuf; /*GstMeta *meta; */ gint width, height, width2; guchar *base[3]; gint i, j, k; gint r_h, r_v; g_return_if_fail (pad != NULL); g_return_if_fail (GST_IS_PAD (pad)); g_return_if_fail (buf != NULL); /*g_return_if_fail(GST_IS_BUFFER(buf)); */ jpegdec = GST_JPEGDEC (GST_OBJECT_PARENT (pad)); if (!GST_PAD_IS_LINKED (jpegdec->srcpad)) { gst_buffer_unref (buf); return; } data = (guchar *) GST_BUFFER_DATA (buf); size = GST_BUFFER_SIZE (buf); GST_LOG_OBJECT (jpegdec, "got buffer of %ld bytes", size); jpegdec->jsrc.next_input_byte = data; jpegdec->jsrc.bytes_in_buffer = size; GST_LOG_OBJECT (jpegdec, "reading header %08lx", *(gulong *) data); jpeg_read_header (&jpegdec->cinfo, TRUE); r_h = jpegdec->cinfo.cur_comp_info[0]->h_samp_factor; r_v = jpegdec->cinfo.cur_comp_info[0]->v_samp_factor; /*g_print ("%d %d\n", r_h, r_v); */ /*g_print ("%d %d\n", jpegdec->cinfo.cur_comp_info[1]->h_samp_factor, jpegdec->cinfo.cur_comp_info[1]->v_samp_factor); */ /*g_print ("%d %d\n", jpegdec->cinfo.cur_comp_info[2]->h_samp_factor, jpegdec->cinfo.cur_comp_info[2]->v_samp_factor); */ jpegdec->cinfo.do_fancy_upsampling = FALSE; jpegdec->cinfo.do_block_smoothing = FALSE; jpegdec->cinfo.out_color_space = JCS_YCbCr; jpegdec->cinfo.dct_method = JDCT_IFAST; jpegdec->cinfo.raw_data_out = TRUE; GST_LOG_OBJECT (jpegdec, "starting decompress"); guarantee_huff_tables (&jpegdec->cinfo); jpeg_start_decompress (&jpegdec->cinfo); width = jpegdec->cinfo.output_width; height = jpegdec->cinfo.output_height; if (jpegdec->height != height || jpegdec->line[0] == NULL) { GstCaps *caps; jpegdec->line[0] = g_realloc (jpegdec->line[0], height * sizeof (char *)); jpegdec->line[1] = g_realloc (jpegdec->line[1], height * sizeof (char *)); jpegdec->line[2] = g_realloc (jpegdec->line[2], height * sizeof (char *)); jpegdec->height = height; caps = gst_caps_new_simple ("video/x-raw-yuv", "format", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('I', '4', '2', '0'), "width", G_TYPE_INT, width, "height", G_TYPE_INT, height, "framerate", G_TYPE_DOUBLE, jpegdec->fps, NULL); GST_DEBUG_OBJECT (jpegdec, "height changed, setting caps %" GST_PTR_FORMAT, caps); gst_pad_set_explicit_caps (jpegdec->srcpad, caps); gst_caps_free (caps); } /* FIXME: someone needs to do the work to figure out how to correctly * calculate an output size that takes into account everything libjpeg * needs, like padding for DCT size and so on. */ outsize = width * height + width * height / 2; outbuf = gst_pad_alloc_buffer (jpegdec->srcpad, GST_BUFFER_OFFSET_NONE, outsize); outdata = GST_BUFFER_DATA (outbuf); GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf); GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buf); GST_LOG_OBJECT (jpegdec, "width %d, height %d, buffer size %d", width, height, outsize); /* mind the swap, jpeglib outputs blue chroma first */ /* FIXME: this needs stride love */ base[0] = outdata; base[1] = base[0] + width * height; base[2] = base[1] + width * height / 4; width2 = width >> 1; GST_LOG_OBJECT (jpegdec, "decompressing %u", jpegdec->cinfo.rec_outbuf_height); for (i = 0; i < height; i += r_v * DCTSIZE) { for (j = 0, k = 0; j < (r_v * DCTSIZE); j += r_v, k++) { jpegdec->line[0][j] = base[0]; base[0] += width; if (r_v == 2) { jpegdec->line[0][j + 1] = base[0]; base[0] += width; } jpegdec->line[1][k] = base[1]; jpegdec->line[2][k] = base[2]; if (r_v == 2 || k & 1) { base[1] += width2; base[2] += width2; } } /*g_print ("%d\n", jpegdec->cinfo.output_scanline); */ jpeg_read_raw_data (&jpegdec->cinfo, jpegdec->line, r_v * DCTSIZE); } GST_LOG_OBJECT (jpegdec, "decompressing finished"); jpeg_finish_decompress (&jpegdec->cinfo); GST_LOG_OBJECT (jpegdec, "sending buffer"); gst_pad_push (jpegdec->srcpad, GST_DATA (outbuf)); gst_buffer_unref (buf); }