/* 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. */ #include /*#define DEBUG_ENABLED*/ #include "gstjpegdec.h" extern GstPadTemplate *jpegdec_src_template, *jpegdec_sink_template; /* elementfactory information */ GstElementDetails gst_jpegdec_details = { "jpeg image decoder", "Codec/Image/Decoder", "LGPL", ".jpeg", VERSION, "Wim Taymans ", "(C) 2000", }; /* JpegDec signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0, /* FILL ME */ }; static void gst_jpegdec_class_init (GstJpegDec *klass); static void gst_jpegdec_init (GstJpegDec *jpegdec); static void gst_jpegdec_chain (GstPad *pad, GstBuffer *buf); 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), NULL, 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 void gst_jpegdec_class_init (GstJpegDec *klass) { GstElementClass *gstelement_class; gstelement_class = (GstElementClass*)klass; parent_class = g_type_class_ref(GST_TYPE_ELEMENT); } static void gst_jpegdec_init_source (j_decompress_ptr cinfo) { GST_DEBUG (0,"gst_jpegdec_chain: init_source"); } static gboolean gst_jpegdec_fill_input_buffer (j_decompress_ptr cinfo) { GST_DEBUG (0,"gst_jpegdec_chain: fill_input_buffer"); return TRUE; } static void gst_jpegdec_skip_input_data (j_decompress_ptr cinfo, glong num_bytes) { GST_DEBUG (0,"gst_jpegdec_chain: skip_input_data"); } static gboolean gst_jpegdec_resync_to_restart (j_decompress_ptr cinfo, gint desired) { GST_DEBUG (0,"gst_jpegdec_chain: resync_to_start"); return TRUE; } static void gst_jpegdec_term_source (j_decompress_ptr cinfo) { GST_DEBUG (0,"gst_jpegdec_chain: term_source"); } static void gst_jpegdec_init (GstJpegDec *jpegdec) { GST_DEBUG (0,"gst_jpegdec_init: initializing"); /* create the sink and src pads */ jpegdec->sinkpad = gst_pad_new_from_template (jpegdec_sink_template, "sink"); gst_element_add_pad(GST_ELEMENT(jpegdec),jpegdec->sinkpad); gst_pad_set_chain_function(jpegdec->sinkpad,gst_jpegdec_chain); jpegdec->srcpad = gst_pad_new_from_template (jpegdec_src_template, "src"); 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; } /* 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 (GST_CAT_PLUGIN_INFO, "Generating standard Huffman tables for this frame."); std_huff_tables(dinfo); } } static void gst_jpegdec_chain (GstPad *pad, GstBuffer *buf) { 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_DEBUG (0,"gst_jpegdec_chain: got buffer of %ld bytes in '%s'",size, GST_OBJECT_NAME (jpegdec)); jpegdec->jsrc.next_input_byte = data; jpegdec->jsrc.bytes_in_buffer = size; GST_DEBUG (0,"gst_jpegdec_chain: 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_DEBUG (0,"gst_jpegdec_chain: starting decompress"); guarantee_huff_tables(&jpegdec->cinfo); jpeg_start_decompress(&jpegdec->cinfo); width = jpegdec->cinfo.output_width; height = jpegdec->cinfo.output_height; GST_DEBUG (0,"gst_jpegdec_chain: width %d, height %d", width, height); outbuf = gst_buffer_new(); outsize = GST_BUFFER_SIZE(outbuf) = width*height + width*height / 2; outdata = GST_BUFFER_DATA(outbuf) = g_malloc(outsize); GST_BUFFER_TIMESTAMP(outbuf) = GST_BUFFER_TIMESTAMP(buf); if (jpegdec->height != height) { 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; gst_pad_try_set_caps (jpegdec->srcpad, GST_CAPS_NEW ( "jpegdec_caps", "video/raw", "format", GST_PROPS_FOURCC (GST_MAKE_FOURCC ('I','4','2','0')), "width", GST_PROPS_INT (width), "height", GST_PROPS_INT (height) )); } /* mind the swap, jpeglib outputs blue chroma first */ base[0] = outdata; base[1] = base[0]+width*height; base[2] = base[1]+width*height/4; width2 = width >> 1; GST_DEBUG (0,"gst_jpegdec_chain: 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_DEBUG (0,"gst_jpegdec_chain: decompressing finished"); jpeg_finish_decompress(&jpegdec->cinfo); GST_DEBUG (0,"gst_jpegdec_chain: sending buffer"); gst_pad_push(jpegdec->srcpad, outbuf); gst_buffer_unref(buf); }