diff options
Diffstat (limited to 'gst/subparse/qttextparse.c')
-rw-r--r-- | gst/subparse/qttextparse.c | 453 |
1 files changed, 0 insertions, 453 deletions
diff --git a/gst/subparse/qttextparse.c b/gst/subparse/qttextparse.c deleted file mode 100644 index b48daf91..00000000 --- a/gst/subparse/qttextparse.c +++ /dev/null @@ -1,453 +0,0 @@ -/* GStreamer QTtext subtitle parser - * Copyright (c) 2009 Thiago Santos <thiago.sousa.santos collabora co uk>> - * - * 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. - */ - -/* References: - * http://www.apple.com/quicktime/tutorials/texttracks.html - * http://www.apple.com/quicktime/tutorials/textdescriptors.html - */ - -#include "qttextparse.h" - -#include <stdlib.h> -#include <stdio.h> -#include <string.h> - -#define MIN_TO_NSEC (60 * GST_SECOND) -#define HOUR_TO_NSEC (60 * MIN_TO_NSEC) - -#define GST_QTTEXT_CONTEXT(state) ((GstQTTextContext *) (state)->user_data) - -typedef struct _GstQTTextContext GstQTTextContext; - -struct _GstQTTextContext -{ - /* timing variables */ - gint timescale; - gboolean absolute; - guint64 start_time; - - gboolean markup_open; - gboolean need_markup; - - gchar *font; - gint font_size; - gchar *bg_color; - gchar *fg_color; - - gboolean bold; - gboolean italic; -}; - -void -qttext_context_init (ParserState * state) -{ - GstQTTextContext *context; - - state->user_data = g_new0 (GstQTTextContext, 1); - - context = GST_QTTEXT_CONTEXT (state); - - /* we use 1000 as a default */ - context->timescale = 1000; - context->absolute = TRUE; - - context->markup_open = FALSE; - context->need_markup = FALSE; - - context->font_size = 12; -} - -void -qttext_context_deinit (ParserState * state) -{ - if (state->user_data != NULL) { - GstQTTextContext *context = GST_QTTEXT_CONTEXT (state); - g_free (context->font); - g_free (context->bg_color); - g_free (context->fg_color); - - g_free (state->user_data); - state->user_data = NULL; - } -} - -/* - * Reads the string right after the ':' - */ -static gchar * -read_str (const gchar * line, const gchar * end) -{ - gint index = 0; - - while (line[index] != ':' && line[index] != '}') { - index++; - } - if (line[index] != ':') - return NULL; - index++; - while (line[index] == ' ') - index++; - - return g_strndup (line + index, (end - (line + index))); -} - -/* search for the ':' and parse the number right after it */ -static gint -read_int (const gchar * line) -{ - gint index = 0; - while (line[index] != ':' && line[index] != '}') { - index++; - } - if (line[index] != ':') - return 0; - index++; - return atoi (line + index); -} - -/* skip the ':' and then match the following string - * with 'match', but only if it before 'upto' */ -static gboolean -string_match (const gchar * line, const gchar * match, const gchar * upto) -{ - gchar *result = strstr (line, match); - return (result < upto); -} - -/* - * Reads the color values and stores them in r, g and b. - */ -static gboolean -read_color (const gchar * line, gint * r, gint * g, gint * b) -{ - gint index = 0; - while (line[index] != ':' && line[index] != '}') { - index++; - } - if (line[index] != ':') - return FALSE; - index++; - - *r = atoi (line + index); - - while (line[index] != '}' && line[index] != ',') { - index++; - } - if (line[index] != ',') - return FALSE; - index++; - - *g = atoi (line + index); - - while (line[index] != '}' && line[index] != ',') { - index++; - } - if (line[index] != ',') - return FALSE; - index++; - - *b = atoi (line + index); - - return TRUE; -} - -static gchar * -make_color (gint r, gint g, gint b) -{ - /* qttext goes up to 65535, while pango goes to 255 */ - r /= 256; - g /= 256; - b /= 256; - return g_strdup_printf ("#%02X%02X%02X", r, g, b); -} - -static gboolean -qttext_parse_tag (ParserState * state, const gchar * line, gint * index) -{ - gchar *next; - gint next_index; - gint aux; - gchar *str; - gint r, g, b; - GstQTTextContext *context = GST_QTTEXT_CONTEXT (state); - - g_assert (line[*index] == '{'); - - next = strchr (line + *index, '}'); - if (next == NULL) { - goto error_out; - } else { - next_index = 1 + (next - line); - } - g_assert (line[next_index - 1] == '}'); - - *index = *index + 1; /* skip the { */ - - /* now identify our tag */ - /* FIXME: those should be case unsensitive */ - /* TODO: there are other tags that could be added here */ - if (strncmp (line + *index, "QTtext", 6) == 0) { - /* NOP */ - - } else if (strncmp (line + *index, "font", 4) == 0) { - str = read_str (line + *index + 4, line + next_index - 1); - if (str) { - g_free (context->font); - context->font = str; - context->need_markup = TRUE; - GST_DEBUG ("Setting qttext font to %s", str); - } else { - GST_WARNING ("Failed to parse qttext font at line: %s", line); - } - - } else if (strncmp (line + *index, "size", 4) == 0) { - aux = read_int (line + *index + 4); - if (aux == 0) { - GST_WARNING ("Invalid size at line %s, using 12", line); - context->font_size = 12; - } else { - GST_DEBUG ("Setting qttext font-size to: %d", aux); - context->font_size = aux; - } - context->need_markup = TRUE; - - } else if (strncmp (line + *index, "textColor", 9) == 0) { - if (read_color (line + *index + 9, &r, &g, &b)) { - context->fg_color = make_color (r, g, b); - GST_DEBUG ("Setting qttext fg color to %s", context->fg_color); - } else { - GST_WARNING ("Failed to read textColor at line %s", line); - } - context->need_markup = TRUE; - - } else if (strncmp (line + *index, "backColor", 9) == 0) { - if (read_color (line + *index + 9, &r, &g, &b)) { - context->bg_color = make_color (r, g, b); - GST_DEBUG ("Setting qttext bg color to %s", context->bg_color); - } else { - GST_WARNING ("Failed to read backColor at line %s, disabling", line); - g_free (context->bg_color); - context->bg_color = NULL; - } - context->need_markup = TRUE; - - } else if (strncmp (line + *index, "plain", 5) == 0) { - context->bold = FALSE; - context->italic = FALSE; - context->need_markup = TRUE; - GST_DEBUG ("Setting qttext style to plain"); - - } else if (strncmp (line + *index, "bold", 4) == 0) { - context->bold = TRUE; - context->italic = FALSE; - context->need_markup = TRUE; - GST_DEBUG ("Setting qttext style to bold"); - - } else if (strncmp (line + *index, "italic", 6) == 0) { - context->bold = FALSE; - context->italic = TRUE; - context->need_markup = TRUE; - GST_DEBUG ("Setting qttext style to italic"); - - } else if (strncmp (line + *index, "timescale", 9) == 0) { - aux = read_int (line + *index + 9); - if (aux == 0) { - GST_WARNING ("Couldn't interpret timescale at line %s, using 1000", line); - context->timescale = 1000; - } else { - GST_DEBUG ("Setting qttext timescale to: %d", aux); - context->timescale = aux; - } - - } else if (strncmp (line + *index, "timestamps", 10) == 0) { - if (string_match (line + *index + 10, "relative", line + next_index)) { - GST_DEBUG ("Setting qttext timestamps to relative"); - context->absolute = FALSE; - } else { - /* call it absolute otherwise */ - GST_DEBUG ("Setting qttext timestamps to absolute"); - context->absolute = TRUE; - } - - } else { - GST_WARNING ("Unused qttext tag starting at: %s", line + *index); - } - - *index = next_index; - return TRUE; - -error_out: - { - GST_WARNING ("Failed to parse qttext tag at line %s", line); - return FALSE; - } -} - -static guint64 -qttext_parse_timestamp (ParserState * state, const gchar * line, gint index) -{ - int ret; - gint hour, min, sec, dec; - GstQTTextContext *context = GST_QTTEXT_CONTEXT (state); - - ret = sscanf (line + index, "[%d:%d:%d.%d]", &hour, &min, &sec, &dec); - if (ret != 3 && ret != 4) { - /* bad timestamp */ - GST_WARNING ("Bad qttext timestamp found: %s", line); - return 0; - } - - if (ret == 3) { - /* be forgiving for missing decimal part */ - dec = 0; - } - - /* parse the decimal part according to the timescale */ - g_assert (context->timescale != 0); - dec = (GST_SECOND * dec) / context->timescale; - - /* return the result */ - return hour * HOUR_TO_NSEC + min * MIN_TO_NSEC + sec * GST_SECOND + dec; -} - -static void -qttext_open_markup (ParserState * state) -{ - GstQTTextContext *context = GST_QTTEXT_CONTEXT (state); - - g_string_append (state->buf, "<span"); - - /* add your markup tags here */ - if (context->font) - g_string_append_printf (state->buf, " font='%s %d'", context->font, - context->font_size); - else - g_string_append_printf (state->buf, " font='%d'", context->font_size); - - if (context->bg_color) - g_string_append_printf (state->buf, " bgcolor='%s'", context->bg_color); - if (context->fg_color) - g_string_append_printf (state->buf, " color='%s'", context->fg_color); - - if (context->bold) - g_string_append (state->buf, " weight='bold'"); - if (context->italic) - g_string_append (state->buf, " style='italic'"); - - g_string_append (state->buf, ">"); -} - -static void -qttext_prepare_text (ParserState * state) -{ - GstQTTextContext *context = GST_QTTEXT_CONTEXT (state); - if (state->buf == NULL) { - state->buf = g_string_sized_new (256); /* this should be enough */ - } else { - g_string_append (state->buf, "\n"); - } - - /* if needed, add pango markup */ - if (context->need_markup) { - if (context->markup_open) { - g_string_append (state->buf, "</span>"); - } - qttext_open_markup (state); - context->markup_open = TRUE; - } -} - -static void -qttext_parse_text (ParserState * state, const gchar * line, gint index) -{ - qttext_prepare_text (state); - g_string_append (state->buf, line + index); -} - -static gchar * -qttext_get_text (ParserState * state) -{ - gchar *ret; - GstQTTextContext *context = GST_QTTEXT_CONTEXT (state); - if (state->buf == NULL) - return NULL; - - if (context->markup_open) { - g_string_append (state->buf, "</span>"); - } - ret = g_string_free (state->buf, FALSE); - state->buf = NULL; - context->markup_open = FALSE; - return ret; -} - -gchar * -parse_qttext (ParserState * state, const gchar * line) -{ - gint i; - guint64 ts; - gchar *ret = NULL; - GstQTTextContext *context = GST_QTTEXT_CONTEXT (state); - - i = 0; - while (line[i] != '\0') { - /* find first interesting character from 'i' onwards */ - - if (line[i] == '{') { - /* this is a tag, parse it */ - if (!qttext_parse_tag (state, line, &i)) { - break; - } - } else if (line[i] == '[') { - /* this is a time, convert it to a timestamp */ - ts = qttext_parse_timestamp (state, line, i); - - /* check if we have pending text to send, in case we prepare it */ - if (state->buf) { - ret = qttext_get_text (state); - if (context->absolute) - state->duration = ts - context->start_time; - else - state->duration = ts; - state->start_time = context->start_time; - } - state->buf = NULL; - - if (ts == 0) { - /* this is an error */ - } else { - if (context->absolute) - context->start_time = ts; - else - context->start_time += ts; - } - - /* we assume there is nothing else on this line */ - break; - - } else if (line[i] == ' ' || line[i] == '\t') { - i++; /* NOP */ - } else { - /* this is the actual text, output the rest of the line as it */ - qttext_parse_text (state, line, i); - break; - } - } - return ret; -} |