[FFmpeg-cvslog] add SubRip encoder
Aurelien Jacobs
git at videolan.org
Mon Mar 28 00:18:17 CEST 2011
ffmpeg | branch: master | Aurelien Jacobs <aurel at gnuage.org> | Tue Sep 14 05:55:12 2010 +0200| [8e43b6fed905eb30ae941a3968825d88c78d5a12] | committer: Aurelien Jacobs
add SubRip encoder
Signed-off-by: Aurelien Jacobs <aurel at gnuage.org>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8e43b6fed905eb30ae941a3968825d88c78d5a12
---
Changelog | 2 +-
MAINTAINERS | 2 +-
doc/general.texi | 2 +-
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 2 +-
libavcodec/ass_split.c | 468 ++++++++++++++++++++++++++++++++++++++++++++++++
libavcodec/ass_split.h | 172 ++++++++++++++++++
libavcodec/srtenc.c | 301 +++++++++++++++++++++++++++++++
libavcodec/version.h | 2 +-
9 files changed, 947 insertions(+), 5 deletions(-)
diff --git a/Changelog b/Changelog
index e9b5be8..c4e2194 100644
--- a/Changelog
+++ b/Changelog
@@ -69,7 +69,7 @@ version <next>:
- replace the ocv_smooth filter with a more generic ocv filter
- Windows Televison (WTV) demuxer
- FFmpeg metadata format muxer and demuxer
-- SubRip (srt) subtitle decoder
+- SubRip (srt) subtitle encoder and decoder
- floating-point AC-3 encoder added
- Lagarith decoder
- ffmpeg -copytb option added
diff --git a/MAINTAINERS b/MAINTAINERS
index 6f371c0..772f956 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -198,7 +198,7 @@ Codecs:
smc.c Mike Melanson
snow.c Michael Niedermayer, Loren Merritt
sonic.c Alex Beregszaszi
- srtdec.c Aurelien Jacobs
+ srt* Aurelien Jacobs
sunrast.c Ivo van Poorten
svq3.c Michael Niedermayer
targa.c Kostya Shishkov
diff --git a/doc/general.texi b/doc/general.texi
index 346f25d..23ffb0d 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -700,7 +700,7 @@ performance on systems without hardware floating point support).
@item DVB @tab X @tab X @tab X @tab X
@item DVD @tab X @tab X @tab X @tab X
@item PGS @tab @tab @tab @tab X
- at item SubRip (SRT) @tab X @tab X @tab @tab X
+ at item SubRip (SRT) @tab X @tab X @tab X @tab X
@item XSUB @tab @tab @tab X @tab X
@end multitable
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index ef91ee3..2dc9f93 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -344,6 +344,7 @@ OBJS-$(CONFIG_SONIC_ENCODER) += sonic.o
OBJS-$(CONFIG_SONIC_LS_ENCODER) += sonic.o
OBJS-$(CONFIG_SP5X_DECODER) += sp5xdec.o mjpegdec.o mjpeg.o
OBJS-$(CONFIG_SRT_DECODER) += srtdec.o ass.o
+OBJS-$(CONFIG_SRT_ENCODER) += srtenc.o ass_split.o
OBJS-$(CONFIG_SUNRAST_DECODER) += sunrast.o
OBJS-$(CONFIG_SVQ1_DECODER) += svq1dec.o svq1.o h263.o \
mpegvideo.o error_resilience.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 861f8c7..695b25b 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -357,7 +357,7 @@ void avcodec_register_all(void)
REGISTER_ENCDEC (DVBSUB, dvbsub);
REGISTER_ENCDEC (DVDSUB, dvdsub);
REGISTER_DECODER (PGSSUB, pgssub);
- REGISTER_DECODER (SRT, srt);
+ REGISTER_ENCDEC (SRT, srt);
REGISTER_ENCDEC (XSUB, xsub);
/* external libraries */
diff --git a/libavcodec/ass_split.c b/libavcodec/ass_split.c
new file mode 100644
index 0000000..2a3b764
--- /dev/null
+++ b/libavcodec/ass_split.c
@@ -0,0 +1,468 @@
+/*
+ * SSA/ASS spliting functions
+ * Copyright (c) 2010 Aurelien Jacobs <aurel at gnuage.org>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "avcodec.h"
+#include "ass_split.h"
+
+typedef enum {
+ ASS_STR,
+ ASS_INT,
+ ASS_FLT,
+ ASS_COLOR,
+ ASS_TIMESTAMP,
+ ASS_ALGN,
+} ASSFieldType;
+
+typedef struct {
+ const char *name;
+ int type;
+ int offset;
+} ASSFields;
+
+typedef struct {
+ const char *section;
+ const char *format_header;
+ const char *fields_header;
+ int size;
+ int offset;
+ int offset_count;
+ ASSFields fields[10];
+} ASSSection;
+
+static const ASSSection ass_sections[] = {
+ { .section = "Script Info",
+ .offset = offsetof(ASS, script_info),
+ .fields = {{"ScriptType", ASS_STR, offsetof(ASSScriptInfo, script_type)},
+ {"Collisions", ASS_STR, offsetof(ASSScriptInfo, collisions) },
+ {"PlayResX", ASS_INT, offsetof(ASSScriptInfo, play_res_x) },
+ {"PlayResY", ASS_INT, offsetof(ASSScriptInfo, play_res_y) },
+ {"Timer", ASS_FLT, offsetof(ASSScriptInfo, timer) },
+ {0},
+ }
+ },
+ { .section = "V4+ Styles",
+ .format_header = "Format",
+ .fields_header = "Style",
+ .size = sizeof(ASSStyle),
+ .offset = offsetof(ASS, styles),
+ .offset_count = offsetof(ASS, styles_count),
+ .fields = {{"Name", ASS_STR, offsetof(ASSStyle, name) },
+ {"Fontname", ASS_STR, offsetof(ASSStyle, font_name) },
+ {"Fontsize", ASS_INT, offsetof(ASSStyle, font_size) },
+ {"PrimaryColour",ASS_COLOR,offsetof(ASSStyle, primary_color)},
+ {"BackColour", ASS_COLOR,offsetof(ASSStyle, back_color) },
+ {"Bold", ASS_INT, offsetof(ASSStyle, bold) },
+ {"Italic", ASS_INT, offsetof(ASSStyle, italic) },
+ {"Underline", ASS_INT, offsetof(ASSStyle, underline) },
+ {"Alignment", ASS_INT, offsetof(ASSStyle, alignment) },
+ {0},
+ }
+ },
+ { .section = "V4 Styles",
+ .format_header = "Format",
+ .fields_header = "Style",
+ .size = sizeof(ASSStyle),
+ .offset = offsetof(ASS, styles),
+ .offset_count = offsetof(ASS, styles_count),
+ .fields = {{"Name", ASS_STR, offsetof(ASSStyle, name) },
+ {"Fontname", ASS_STR, offsetof(ASSStyle, font_name) },
+ {"Fontsize", ASS_INT, offsetof(ASSStyle, font_size) },
+ {"PrimaryColour",ASS_COLOR,offsetof(ASSStyle, primary_color)},
+ {"BackColour", ASS_COLOR,offsetof(ASSStyle, back_color) },
+ {"Bold", ASS_INT, offsetof(ASSStyle, bold) },
+ {"Italic", ASS_INT, offsetof(ASSStyle, italic) },
+ {"Alignment", ASS_ALGN, offsetof(ASSStyle, alignment) },
+ {0},
+ }
+ },
+ { .section = "Events",
+ .format_header = "Format",
+ .fields_header = "Dialogue",
+ .size = sizeof(ASSDialog),
+ .offset = offsetof(ASS, dialogs),
+ .offset_count = offsetof(ASS, dialogs_count),
+ .fields = {{"Layer", ASS_INT, offsetof(ASSDialog, layer) },
+ {"Start", ASS_TIMESTAMP, offsetof(ASSDialog, start) },
+ {"End", ASS_TIMESTAMP, offsetof(ASSDialog, end) },
+ {"Style", ASS_STR, offsetof(ASSDialog, style) },
+ {"Text", ASS_STR, offsetof(ASSDialog, text) },
+ {0},
+ }
+ },
+};
+
+
+typedef int (*ASSConvertFunc)(void *dest, const char *buf, int len);
+
+static int convert_str(void *dest, const char *buf, int len)
+{
+ char *str = av_malloc(len + 1);
+ if (str) {
+ memcpy(str, buf, len);
+ str[len] = 0;
+ if (*(void **)dest)
+ av_free(*(void **)dest);
+ *(char **)dest = str;
+ }
+ return !str;
+}
+static int convert_int(void *dest, const char *buf, int len)
+{
+ return sscanf(buf, "%d", (int *)dest) == 1;
+}
+static int convert_flt(void *dest, const char *buf, int len)
+{
+ return sscanf(buf, "%f", (float *)dest) == 1;
+}
+static int convert_color(void *dest, const char *buf, int len)
+{
+ return sscanf(buf, "&H%8x", (int *)dest) == 1 ||
+ sscanf(buf, "%d", (int *)dest) == 1;
+}
+static int convert_timestamp(void *dest, const char *buf, int len)
+{
+ int c, h, m, s, cs;
+ if ((c = sscanf(buf, "%d:%02d:%02d.%02d", &h, &m, &s, &cs)) == 4)
+ *(int *)dest = 360000*h + 6000*m + 100*s + cs;
+ return c == 4;
+}
+static int convert_alignment(void *dest, const char *buf, int len)
+{
+ int a;
+ if (sscanf(buf, "%d", &a) == 1) {
+ /* convert V4 Style alignment to V4+ Style */
+ *(int *)dest = a + ((a&4) >> 1) - 5*!!(a&8);
+ return 1;
+ }
+ return 0;
+}
+
+static const ASSConvertFunc convert_func[] = {
+ [ASS_STR] = convert_str,
+ [ASS_INT] = convert_int,
+ [ASS_FLT] = convert_flt,
+ [ASS_COLOR] = convert_color,
+ [ASS_TIMESTAMP] = convert_timestamp,
+ [ASS_ALGN] = convert_alignment,
+};
+
+
+struct ASSSplitContext {
+ ASS ass;
+ int current_section;
+ int field_number[FF_ARRAY_ELEMS(ass_sections)];
+ int *field_order[FF_ARRAY_ELEMS(ass_sections)];
+};
+
+
+static uint8_t *realloc_section_array(ASSSplitContext *ctx)
+{
+ const ASSSection *section = &ass_sections[ctx->current_section];
+ int *count = (int *)((uint8_t *)&ctx->ass + section->offset_count);
+ void **section_ptr = (void **)((uint8_t *)&ctx->ass + section->offset);
+ uint8_t *tmp = av_realloc(*section_ptr, (*count+1)*section->size);
+ if (!tmp)
+ return NULL;
+ *section_ptr = tmp;
+ tmp += *count * section->size;
+ memset(tmp, 0, section->size);
+ (*count)++;
+ return tmp;
+}
+
+static inline int is_eol(char buf)
+{
+ return buf == '\r' || buf == '\n' || buf == 0;
+}
+
+static inline const char *skip_space(const char *buf)
+{
+ while (*buf == ' ')
+ buf++;
+ return buf;
+}
+
+static const char *ass_split_section(ASSSplitContext *ctx, const char *buf)
+{
+ const ASSSection *section = &ass_sections[ctx->current_section];
+ int *number = &ctx->field_number[ctx->current_section];
+ int *order = ctx->field_order[ctx->current_section];
+ int *tmp, i, len;
+
+ while (buf && *buf) {
+ if (buf[0] == '[') {
+ ctx->current_section = -1;
+ break;
+ }
+ if (buf[0] == ';' || (buf[0] == '!' && buf[1] == ':')) {
+ /* skip comments */
+ } else if (section->format_header && !order) {
+ len = strlen(section->format_header);
+ if (strncmp(buf, section->format_header, len) || buf[len] != ':')
+ return NULL;
+ buf += len + 1;
+ while (!is_eol(*buf)) {
+ buf = skip_space(buf);
+ len = strcspn(buf, ", \r\n");
+ if (!(tmp = av_realloc(order, (*number + 1) * sizeof(*order))))
+ return NULL;
+ order = tmp;
+ order[*number] = -1;
+ for (i=0; section->fields[i].name; i++)
+ if (!strncmp(buf, section->fields[i].name, len)) {
+ order[*number] = i;
+ break;
+ }
+ (*number)++;
+ buf = skip_space(buf + len + 1);
+ }
+ ctx->field_order[ctx->current_section] = order;
+ } else if (section->fields_header) {
+ len = strlen(section->fields_header);
+ if (!strncmp(buf, section->fields_header, len) && buf[len] == ':') {
+ uint8_t *ptr, *struct_ptr = realloc_section_array(ctx);
+ if (!struct_ptr) return NULL;
+ buf += len + 1;
+ for (i=0; !is_eol(*buf) && i < *number; i++) {
+ int last = i == *number - 1;
+ buf = skip_space(buf);
+ len = strcspn(buf, last ? "\r\n" : ",\r\n");
+ if (order[i] >= 0) {
+ ASSFieldType type = section->fields[order[i]].type;
+ ptr = struct_ptr + section->fields[order[i]].offset;
+ convert_func[type](ptr, buf, len);
+ }
+ buf = skip_space(buf + len + !last);
+ }
+ }
+ } else {
+ len = strcspn(buf, ":\r\n");
+ if (buf[len] == ':') {
+ for (i=0; section->fields[i].name; i++)
+ if (!strncmp(buf, section->fields[i].name, len)) {
+ ASSFieldType type = section->fields[i].type;
+ uint8_t *ptr = (uint8_t *)&ctx->ass + section->offset;
+ ptr += section->fields[i].offset;
+ buf = skip_space(buf + len + 1);
+ convert_func[type](ptr, buf, strcspn(buf, "\r\n"));
+ break;
+ }
+ }
+ }
+ buf += strcspn(buf, "\n") + 1;
+ }
+ return buf;
+}
+
+static int ass_split(ASSSplitContext *ctx, const char *buf)
+{
+ char c, section[16];
+ int i;
+
+ if (ctx->current_section >= 0)
+ buf = ass_split_section(ctx, buf);
+
+ while (buf && *buf) {
+ if (sscanf(buf, "[%15[0-9A-Za-z+ ]]%c", section, &c) == 2) {
+ buf += strcspn(buf, "\n") + 1;
+ for (i=0; i<FF_ARRAY_ELEMS(ass_sections); i++)
+ if (!strcmp(section, ass_sections[i].section)) {
+ ctx->current_section = i;
+ buf = ass_split_section(ctx, buf);
+ }
+ } else
+ buf += strcspn(buf, "\n") + 1;
+ }
+ return buf ? 0 : AVERROR_INVALIDDATA;
+}
+
+ASSSplitContext *ff_ass_split(const char *buf)
+{
+ ASSSplitContext *ctx = av_mallocz(sizeof(*ctx));
+ ctx->current_section = -1;
+ if (ass_split(ctx, buf) < 0) {
+ ff_ass_split_free(ctx);
+ return NULL;
+ }
+ return ctx;
+}
+
+static void free_section(ASSSplitContext *ctx, const ASSSection *section)
+{
+ uint8_t *ptr = (uint8_t *)&ctx->ass + section->offset;
+ int i, j, *count, c = 1;
+
+ if (section->format_header) {
+ ptr = *(void **)ptr;
+ count = (int *)((uint8_t *)&ctx->ass + section->offset_count);
+ } else
+ count = &c;
+
+ if (ptr)
+ for (i=0; i<*count; i++, ptr += section->size)
+ for (j=0; section->fields[j].name; j++) {
+ const ASSFields *field = §ion->fields[j];
+ if (field->type == ASS_STR)
+ av_freep(ptr + field->offset);
+ }
+ *count = 0;
+
+ if (section->format_header)
+ av_freep((uint8_t *)&ctx->ass + section->offset);
+}
+
+ASSDialog *ff_ass_split_dialog(ASSSplitContext *ctx, const char *buf,
+ int cache, int *number)
+{
+ ASSDialog *dialog = NULL;
+ int i, count;
+ if (!cache)
+ for (i=0; i<FF_ARRAY_ELEMS(ass_sections); i++)
+ if (!strcmp(ass_sections[i].section, "Events")) {
+ free_section(ctx, &ass_sections[i]);
+ break;
+ }
+ count = ctx->ass.dialogs_count;
+ if (ass_split(ctx, buf) == 0)
+ dialog = ctx->ass.dialogs + count;
+ if (number)
+ *number = ctx->ass.dialogs_count - count;
+ return dialog;
+}
+
+void ff_ass_split_free(ASSSplitContext *ctx)
+{
+ if (ctx) {
+ int i;
+ for (i=0; i<FF_ARRAY_ELEMS(ass_sections); i++)
+ free_section(ctx, &ass_sections[i]);
+ av_free(ctx);
+ }
+}
+
+
+int ff_ass_split_override_codes(const ASSCodesCallbacks *callbacks, void *priv,
+ const char *buf)
+{
+ const char *text = NULL;
+ char new_line[2];
+ int text_len = 0;
+
+ while (*buf) {
+ if (text && callbacks->text &&
+ (sscanf(buf, "\\%1[nN]", new_line) == 1 ||
+ !strncmp(buf, "{\\", 2))) {
+ callbacks->text(priv, text, text_len);
+ text = NULL;
+ }
+ if (sscanf(buf, "\\%1[nN]", new_line) == 1) {
+ if (callbacks->new_line)
+ callbacks->new_line(priv, new_line[0] == 'N');
+ buf += 2;
+ } else if (!strncmp(buf, "{\\", 2)) {
+ buf++;
+ while (*buf == '\\') {
+ char style[2], c[2], sep[2], c_num[2] = "0", tmp[128] = {0};
+ unsigned int color = 0xFFFFFFFF;
+ int len, size = -1, an = -1, alpha = -1;
+ int x1, y1, x2, y2, t1 = -1, t2 = -1;
+ if (sscanf(buf, "\\%1[bisu]%1[01\\}]%n", style, c, &len) > 1) {
+ int close = c[0] == '0' ? 1 : c[0] == '1' ? 0 : -1;
+ len += close != -1;
+ if (callbacks->style)
+ callbacks->style(priv, style[0], close);
+ } else if (sscanf(buf, "\\c%1[\\}]%n", sep, &len) > 0 ||
+ sscanf(buf, "\\c&H%X&%1[\\}]%n", &color, sep, &len) > 1 ||
+ sscanf(buf, "\\%1[1234]c%1[\\}]%n", c_num, sep, &len) > 1 ||
+ sscanf(buf, "\\%1[1234]c&H%X&%1[\\}]%n", c_num, &color, sep, &len) > 2) {
+ if (callbacks->color)
+ callbacks->color(priv, color, c_num[0] - '0');
+ } else if (sscanf(buf, "\\alpha%1[\\}]%n", sep, &len) > 0 ||
+ sscanf(buf, "\\alpha&H%2X&%1[\\}]%n", &alpha, sep, &len) > 1 ||
+ sscanf(buf, "\\%1[1234]a%1[\\}]%n", c_num, sep, &len) > 1 ||
+ sscanf(buf, "\\%1[1234]a&H%2X&%1[\\}]%n", c_num, &alpha, sep, &len) > 2) {
+ if (callbacks->alpha)
+ callbacks->alpha(priv, alpha, c_num[0] - '0');
+ } else if (sscanf(buf, "\\fn%1[\\}]%n", sep, &len) > 0 ||
+ sscanf(buf, "\\fn%127[^\\}]%1[\\}]%n", tmp, sep, &len) > 1) {
+ if (callbacks->font_name)
+ callbacks->font_name(priv, tmp[0] ? tmp : NULL);
+ } else if (sscanf(buf, "\\fs%1[\\}]%n", sep, &len) > 0 ||
+ sscanf(buf, "\\fs%u%1[\\}]%n", &size, sep, &len) > 1) {
+ if (callbacks->font_size)
+ callbacks->font_size(priv, size);
+ } else if (sscanf(buf, "\\a%1[\\}]%n", sep, &len) > 0 ||
+ sscanf(buf, "\\a%2u%1[\\}]%n", &an, sep, &len) > 1 ||
+ sscanf(buf, "\\an%1[\\}]%n", sep, &len) > 0 ||
+ sscanf(buf, "\\an%1u%1[\\}]%n", &an, sep, &len) > 1) {
+ if (an != -1 && buf[2] != 'n')
+ an = (an&3) + (an&4 ? 6 : an&8 ? 3 : 0);
+ if (callbacks->alignment)
+ callbacks->alignment(priv, an);
+ } else if (sscanf(buf, "\\r%1[\\}]%n", sep, &len) > 0 ||
+ sscanf(buf, "\\r%127[^\\}]%1[\\}]%n", tmp, sep, &len) > 1) {
+ if (callbacks->cancel_overrides)
+ callbacks->cancel_overrides(priv, tmp);
+ } else if (sscanf(buf, "\\move(%d,%d,%d,%d)%1[\\}]%n", &x1, &y1, &x2, &y2, sep, &len) > 4 ||
+ sscanf(buf, "\\move(%d,%d,%d,%d,%d,%d)%1[\\}]%n", &x1, &y1, &x2, &y2, &t1, &t2, sep, &len) > 6) {
+ if (callbacks->move)
+ callbacks->move(priv, x1, y1, x2, y2, t1, t2);
+ } else if (sscanf(buf, "\\pos(%d,%d)%1[\\}]%n", &x1, &y1, sep, &len) > 2) {
+ if (callbacks->move)
+ callbacks->move(priv, x1, y1, x1, y1, -1, -1);
+ } else if (sscanf(buf, "\\org(%d,%d)%1[\\}]%n", &x1, &y1, sep, &len) > 2) {
+ if (callbacks->origin)
+ callbacks->origin(priv, x1, y1);
+ } else {
+ len = strcspn(buf+1, "\\}") + 2; /* skip unknown code */
+ }
+ buf += len - 1;
+ }
+ if (*buf++ != '}')
+ return AVERROR_INVALIDDATA;
+ } else {
+ if (!text) {
+ text = buf;
+ text_len = 1;
+ } else
+ text_len++;
+ buf++;
+ }
+ }
+ if (text && callbacks->text)
+ callbacks->text(priv, text, text_len);
+ if (callbacks->end)
+ callbacks->end(priv);
+ return 0;
+}
+
+ASSStyle *ass_style_get(ASSSplitContext *ctx, const char *style)
+{
+ ASS *ass = &ctx->ass;
+ int i;
+
+ if (!style || !*style)
+ style = "Default";
+ for (i=0; i<ass->styles_count; i++)
+ if (!strcmp(ass->styles[i].name, style))
+ return ass->styles + i;
+ return NULL;
+}
diff --git a/libavcodec/ass_split.h b/libavcodec/ass_split.h
new file mode 100644
index 0000000..66b452b
--- /dev/null
+++ b/libavcodec/ass_split.h
@@ -0,0 +1,172 @@
+/*
+ * SSA/ASS spliting functions
+ * Copyright (c) 2010 Aurelien Jacobs <aurel at gnuage.org>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_ASS_SPLIT_H
+#define AVCODEC_ASS_SPLIT_H
+
+/**
+ * fields extracted from the [Script Info] section
+ */
+typedef struct {
+ char *script_type; /**< SSA script format version (eg. v4.00) */
+ char *collisions; /**< how subtitles are moved to prevent collisions */
+ int play_res_x; /**< video width that ASS coords are referring to */
+ int play_res_y; /**< video height that ASS coords are referring to */
+ float timer; /**< time multiplier to apply to SSA clock (in %) */
+} ASSScriptInfo;
+
+/**
+ * fields extracted from the [V4(+) Styles] section
+ */
+typedef struct {
+ char *name; /**< name of the tyle (case sensitive) */
+ char *font_name; /**< font face (case sensitive) */
+ int font_size; /**< font height */
+ int primary_color; /**< color that a subtitle will normally appear in */
+ int back_color; /**< color of the subtitle outline or shadow */
+ int bold; /**< whether text is bold (1) or not (0) */
+ int italic; /**< whether text is italic (1) or not (0) */
+ int underline; /**< whether text is underlined (1) or not (0) */
+ int alignment; /**< position of the text (left, center, top...),
+ defined after the layout of the numpad
+ (1-3 sub, 4-6 mid, 7-9 top) */
+} ASSStyle;
+
+/**
+ * fields extracted from the [Events] section
+ */
+typedef struct {
+ int layer; /**< higher numbered layers are drawn over lower numbered */
+ int start; /**< start time of the dialog in centiseconds */
+ int end; /**< end time of the dialog in centiseconds */
+ char *style; /**< name of the ASSStyle to use with this dialog */
+ char *text; /**< actual text which will be displayed as a subtitle,
+ can include style override control codes (see
+ ff_ass_split_override_codes()) */
+} ASSDialog;
+
+/**
+ * structure containing the whole split ASS data
+ */
+typedef struct {
+ ASSScriptInfo script_info; /**< general information about the SSA script*/
+ ASSStyle *styles; /**< array of split out styles */
+ int styles_count; /**< number of ASSStyle in the styles array */
+ ASSDialog *dialogs; /**< array of split out dialogs */
+ int dialogs_count; /**< number of ASSDialog in the dialogs array*/
+} ASS;
+
+/**
+ * This struct can be casted to ASS to access to the split data.
+ */
+typedef struct ASSSplitContext ASSSplitContext;
+
+/**
+ * Split a full ASS file or a ASS header from a string buffer and store
+ * the split structure in a newly allocated context.
+ *
+ * @param buf String containing the ASS formated data.
+ * @return Newly allocated struct containing split data.
+ */
+ASSSplitContext *ff_ass_split(const char *buf);
+
+/**
+ * Split one or several ASS "Dialogue" lines from a string buffer and store
+ * them in a already initialized context.
+ *
+ * @param ctx Context previously initialized by ff_ass_split().
+ * @param buf String containing the ASS "Dialogue" lines.
+ * @param cache Set to 1 to keep all the previously split ASSDialog in
+ * the context, or set to 0 to free all the previously split
+ * ASSDialog.
+ * @param number If not NULL, the pointed integer will be set to the number
+ * of split ASSDialog.
+ * @return Pointer to the first split ASSDialog.
+ */
+ASSDialog *ff_ass_split_dialog(ASSSplitContext *ctx, const char *buf,
+ int cache, int *number);
+
+/**
+ * Free all the memory allocated for an ASSSplitContext.
+ *
+ * @param ctx Context previously initialized by ff_ass_split().
+ */
+void ff_ass_split_free(ASSSplitContext *ctx);
+
+
+/**
+ * Set of callback functions corresponding to each override codes that can
+ * be encountered in a "Dialogue" Text field.
+ */
+typedef struct {
+ /**
+ * @defgroup ass_styles ASS styles
+ * @{
+ */
+ void (*text)(void *priv, const char *text, int len);
+ void (*new_line)(void *priv, int forced);
+ void (*style)(void *priv, char style, int close);
+ void (*color)(void *priv, unsigned int color, unsigned int color_id);
+ void (*alpha)(void *priv, int alpha, int alpha_id);
+ void (*font_name)(void *priv, const char *name);
+ void (*font_size)(void *priv, int size);
+ void (*alignment)(void *priv, int alignment);
+ void (*cancel_overrides)(void *priv, const char *style);
+ /**< @} */
+
+ /**
+ * @defgroup ass_functions ASS functions
+ * @{
+ */
+ void (*move)(void *priv, int x1, int y1, int x2, int y2, int t1, int t2);
+ void (*origin)(void *priv, int x, int y);
+ /**< @} */
+
+ /**
+ * @defgroup ass_end end of Dialogue Event
+ * @{
+ */
+ void (*end)(void *priv);
+ /**< @} */
+} ASSCodesCallbacks;
+
+/**
+ * Split override codes out of a ASS "Dialogue" Text field.
+ *
+ * @param callbacks Set of callback functions called for each override code
+ * encountered.
+ * @param priv Opaque pointer passed to the callback functions.
+ * @param buf The ASS "Dialogue" Text field to split.
+ * @return >= 0 on success otherwise an error code <0
+ */
+int ff_ass_split_override_codes(const ASSCodesCallbacks *callbacks, void *priv,
+ const char *buf);
+
+/**
+ * Find an ASSStyle structure by its name.
+ *
+ * @param ctx Context previously initialized by ff_ass_split().
+ * @param style name of the style to search for.
+ * @return the ASSStyle corresponding to style, or NULL if style can't be found
+ */
+ASSStyle *ass_style_get(ASSSplitContext *ctx, const char *style);
+
+#endif /* AVCODEC_ASS_SPLIT_H */
diff --git a/libavcodec/srtenc.c b/libavcodec/srtenc.c
new file mode 100644
index 0000000..56d3397
--- /dev/null
+++ b/libavcodec/srtenc.c
@@ -0,0 +1,301 @@
+/*
+ * SubRip subtitle encoder
+ * Copyright (c) 2010 Aurelien Jacobs <aurel at gnuage.org>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdarg.h>
+#include "avcodec.h"
+#include "libavutil/avstring.h"
+#include "ass_split.h"
+#include "ass.h"
+
+
+#define SRT_STACK_SIZE 64
+
+typedef struct {
+ AVCodecContext *avctx;
+ ASSSplitContext *ass_ctx;
+ char buffer[2048];
+ char *ptr;
+ char *end;
+ char *dialog_start;
+ int count;
+ char stack[SRT_STACK_SIZE];
+ int stack_ptr;
+ int alignment_applied;
+} SRTContext;
+
+
+#ifdef __GNUC__
+__attribute__ ((__format__ (__printf__, 2, 3)))
+#endif
+static void srt_print(SRTContext *s, const char *str, ...)
+{
+ va_list vargs;
+ va_start(vargs, str);
+ s->ptr += vsnprintf(s->ptr, s->end - s->ptr, str, vargs);
+ va_end(vargs);
+}
+
+static int srt_stack_push(SRTContext *s, const char c)
+{
+ if (s->stack_ptr >= SRT_STACK_SIZE)
+ return -1;
+ s->stack[s->stack_ptr++] = c;
+ return 0;
+}
+
+static char srt_stack_pop(SRTContext *s)
+{
+ if (s->stack_ptr <= 0)
+ return 0;
+ return s->stack[--s->stack_ptr];
+}
+
+static int srt_stack_find(SRTContext *s, const char c)
+{
+ int i;
+ for (i = s->stack_ptr-1; i >= 0; i--)
+ if (s->stack[i] == c)
+ break;
+ return i;
+}
+
+static void srt_close_tag(SRTContext *s, char tag)
+{
+ srt_print(s, "</%c%s>", tag, tag == 'f' ? "ont" : "");
+}
+
+static void srt_stack_push_pop(SRTContext *s, const char c, int close)
+{
+ if (close) {
+ int i = c ? srt_stack_find(s, c) : 0;
+ if (i < 0)
+ return;
+ while (s->stack_ptr != i)
+ srt_close_tag(s, srt_stack_pop(s));
+ } else if (srt_stack_push(s, c) < 0)
+ av_log(s->avctx, AV_LOG_ERROR, "tag stack overflow\n");
+}
+
+static void srt_style_apply(SRTContext *s, const char *style)
+{
+ ASSStyle *st = ass_style_get(s->ass_ctx, style);
+ if (st) {
+ int c = st->primary_color & 0xFFFFFF;
+ if (st->font_name && strcmp(st->font_name, ASS_DEFAULT_FONT) ||
+ st->font_size != ASS_DEFAULT_FONT_SIZE ||
+ c != ASS_DEFAULT_COLOR) {
+ srt_print(s, "<font");
+ if (st->font_name && strcmp(st->font_name, ASS_DEFAULT_FONT))
+ srt_print(s, " face=\"%s\"", st->font_name);
+ if (st->font_size != ASS_DEFAULT_FONT_SIZE)
+ srt_print(s, " size=\"%d\"", st->font_size);
+ if (c != ASS_DEFAULT_COLOR)
+ srt_print(s, " color=\"#%06x\"",
+ (c & 0xFF0000) >> 16 | c & 0xFF00 | (c & 0xFF) << 16);
+ srt_print(s, ">");
+ srt_stack_push(s, 'f');
+ }
+ if (st->bold != ASS_DEFAULT_BOLD) {
+ srt_print(s, "<b>");
+ srt_stack_push(s, 'b');
+ }
+ if (st->italic != ASS_DEFAULT_ITALIC) {
+ srt_print(s, "<i>");
+ srt_stack_push(s, 'i');
+ }
+ if (st->underline != ASS_DEFAULT_UNDERLINE) {
+ srt_print(s, "<u>");
+ srt_stack_push(s, 'u');
+ }
+ if (st->alignment != ASS_DEFAULT_ALIGNMENT) {
+ srt_print(s, "{\\an%d}", st->alignment);
+ s->alignment_applied = 1;
+ }
+ }
+}
+
+
+static av_cold int srt_encode_init(AVCodecContext *avctx)
+{
+ SRTContext *s = avctx->priv_data;
+ s->avctx = avctx;
+ s->ass_ctx = ff_ass_split(avctx->subtitle_header);
+ return s->ass_ctx ? 0 : AVERROR_INVALIDDATA;
+}
+
+static void srt_text_cb(void *priv, const char *text, int len)
+{
+ SRTContext *s = priv;
+ av_strlcpy(s->ptr, text, FFMIN(s->end-s->ptr, len+1));
+ s->ptr += len;
+}
+
+static void srt_new_line_cb(void *priv, int forced)
+{
+ srt_print(priv, "\r\n");
+}
+
+static void srt_style_cb(void *priv, char style, int close)
+{
+ srt_stack_push_pop(priv, style, close);
+ if (!close)
+ srt_print(priv, "<%c>", style);
+}
+
+static void srt_color_cb(void *priv, unsigned int color, unsigned int color_id)
+{
+ if (color_id > 1)
+ return;
+ srt_stack_push_pop(priv, 'f', color == 0xFFFFFFFF);
+ if (color != 0xFFFFFFFF)
+ srt_print(priv, "<font color=\"#%06x\">",
+ (color & 0xFF0000) >> 16 | color & 0xFF00 | (color & 0xFF) << 16);
+}
+
+static void srt_font_name_cb(void *priv, const char *name)
+{
+ srt_stack_push_pop(priv, 'f', !name);
+ if (name)
+ srt_print(priv, "<font face=\"%s\">", name);
+}
+
+static void srt_font_size_cb(void *priv, int size)
+{
+ srt_stack_push_pop(priv, 'f', size < 0);
+ if (size >= 0)
+ srt_print(priv, "<font size=\"%d\">", size);
+}
+
+static void srt_alignment_cb(void *priv, int alignment)
+{
+ SRTContext *s = priv;
+ if (!s->alignment_applied && alignment >= 0) {
+ srt_print(s, "{\\an%d}", alignment);
+ s->alignment_applied = 1;
+ }
+}
+
+static void srt_cancel_overrides_cb(void *priv, const char *style)
+{
+ srt_stack_push_pop(priv, 0, 1);
+ srt_style_apply(priv, style);
+}
+
+static void srt_move_cb(void *priv, int x1, int y1, int x2, int y2,
+ int t1, int t2)
+{
+ SRTContext *s = priv;
+ char buffer[32];
+ int len = snprintf(buffer, sizeof(buffer),
+ " X1:%03u X2:%03u Y1:%03u Y2:%03u", x1, x2, y1, y2);
+ if (s->end - s->ptr > len) {
+ memmove(s->dialog_start+len, s->dialog_start, s->ptr-s->dialog_start+1);
+ memcpy(s->dialog_start, buffer, len);
+ s->ptr += len;
+ }
+}
+
+static void srt_end_cb(void *priv)
+{
+ srt_stack_push_pop(priv, 0, 1);
+ srt_print(priv, "\r\n\r\n");
+}
+
+static const ASSCodesCallbacks srt_callbacks = {
+ .text = srt_text_cb,
+ .new_line = srt_new_line_cb,
+ .style = srt_style_cb,
+ .color = srt_color_cb,
+ .font_name = srt_font_name_cb,
+ .font_size = srt_font_size_cb,
+ .alignment = srt_alignment_cb,
+ .cancel_overrides = srt_cancel_overrides_cb,
+ .move = srt_move_cb,
+ .end = srt_end_cb,
+};
+
+static int srt_encode_frame(AVCodecContext *avctx,
+ unsigned char *buf, int bufsize, void *data)
+{
+ SRTContext *s = avctx->priv_data;
+ AVSubtitle *sub = data;
+ ASSDialog *dialog;
+ int i, len, num;
+
+ s->ptr = s->buffer;
+ s->end = s->ptr + sizeof(s->buffer);
+
+ for (i=0; i<sub->num_rects; i++) {
+
+ if (sub->rects[i]->type != SUBTITLE_ASS) {
+ av_log(avctx, AV_LOG_ERROR, "Only SUBTITLE_ASS type supported.\n");
+ return AVERROR(ENOSYS);
+ }
+
+ dialog = ff_ass_split_dialog(s->ass_ctx, sub->rects[i]->ass, 0, &num);
+ for (; dialog && num--; dialog++) {
+ int sh, sm, ss, sc = 10 * dialog->start;
+ int eh, em, es, ec = 10 * dialog->end;
+ sh = sc/3600000; sc -= 3600000*sh;
+ sm = sc/ 60000; sc -= 60000*sm;
+ ss = sc/ 1000; sc -= 1000*ss;
+ eh = ec/3600000; ec -= 3600000*eh;
+ em = ec/ 60000; ec -= 60000*em;
+ es = ec/ 1000; ec -= 1000*es;
+ srt_print(s,"%d\r\n%02d:%02d:%02d,%03d --> %02d:%02d:%02d,%03d\r\n",
+ ++s->count, sh, sm, ss, sc, eh, em, es, ec);
+ s->alignment_applied = 0;
+ s->dialog_start = s->ptr - 2;
+ srt_style_apply(s, dialog->style);
+ ff_ass_split_override_codes(&srt_callbacks, s, dialog->text);
+ }
+ }
+
+ if (s->ptr == s->buffer)
+ return 0;
+
+ len = av_strlcpy(buf, s->buffer, bufsize);
+
+ if (len > bufsize-1) {
+ av_log(avctx, AV_LOG_ERROR, "Buffer too small for ASS event.\n");
+ return -1;
+ }
+
+ return len;
+}
+
+static int srt_encode_close(AVCodecContext *avctx)
+{
+ SRTContext *s = avctx->priv_data;
+ ff_ass_split_free(s->ass_ctx);
+ return 0;
+}
+
+AVCodec ff_srt_encoder = {
+ .name = "srt",
+ .long_name = NULL_IF_CONFIG_SMALL("SubRip subtitle"),
+ .type = AVMEDIA_TYPE_SUBTITLE,
+ .id = CODEC_ID_SRT,
+ .priv_data_size = sizeof(SRTContext),
+ .init = srt_encode_init,
+ .encode = srt_encode_frame,
+ .close = srt_encode_close,
+};
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 73a6f33..a1c8365 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -21,7 +21,7 @@
#define AVCODEC_VERSION_H
#define LIBAVCODEC_VERSION_MAJOR 52
-#define LIBAVCODEC_VERSION_MINOR 115
+#define LIBAVCODEC_VERSION_MINOR 116
#define LIBAVCODEC_VERSION_MICRO 0
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
More information about the ffmpeg-cvslog
mailing list