* 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 <string.h>
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
/* 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)
{
- g_free (state->user_data);
- state->user_data = NULL;
+ 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
{
gchar *next;
gint next_index;
+ gint aux;
+ gchar *str;
+ gint r, g, b;
+ GstQTTextContext *context = GST_QTTEXT_CONTEXT (state);
g_assert (line[*index] == '{');
*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);
}
}
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");
}
- /* TODO add the pango markup */
+ /* 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
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)
{
/* check if we have pending text to send, in case we prepare it */
if (state->buf) {
- ret = g_string_free (state->buf, FALSE);
+ ret = qttext_get_text (state);
if (context->absolute)
state->duration = ts - context->start_time;
else