[FFmpeg-cvslog] avcodec: add bmp parser
Paul B Mahol
git at videolan.org
Tue Aug 7 06:03:57 CEST 2012
ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Sun Aug 5 23:46:41 2012 +0000| [011ce89dba5c0c764abc5f39acb6368f580742e3] | committer: Paul B Mahol
avcodec: add bmp parser
Signed-off-by: Paul B Mahol <onemda at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=011ce89dba5c0c764abc5f39acb6368f580742e3
---
Changelog | 1 +
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 1 +
libavcodec/bmp_parser.c | 91 +++++++++++++++++++++++++++++++++++++++++++++++
libavcodec/version.h | 2 +-
5 files changed, 95 insertions(+), 1 deletion(-)
diff --git a/Changelog b/Changelog
index b7db8ed..ce0d53c 100644
--- a/Changelog
+++ b/Changelog
@@ -41,6 +41,7 @@ version next:
- Canopus Lossless Codec decoder
- bitmap subtitles in filters (experimental and temporary)
- MP2 encoding via TwoLAME
+- bmp parser
version 0.11:
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 1cd44d4..bc6d430 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -718,6 +718,7 @@ OBJS-$(CONFIG_AAC_PARSER) += aac_parser.o aac_ac3_parser.o \
OBJS-$(CONFIG_AC3_PARSER) += ac3_parser.o ac3tab.o \
aac_ac3_parser.o
OBJS-$(CONFIG_ADX_PARSER) += adx_parser.o adx.o
+OBJS-$(CONFIG_BMP_PARSER) += bmp_parser.o
OBJS-$(CONFIG_CAVSVIDEO_PARSER) += cavs_parser.o
OBJS-$(CONFIG_COOK_PARSER) += cook_parser.o
OBJS-$(CONFIG_DCA_PARSER) += dca_parser.o dca.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 8305bc2..6b42c30 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -456,6 +456,7 @@ void avcodec_register_all(void)
REGISTER_PARSER (AAC_LATM, aac_latm);
REGISTER_PARSER (AC3, ac3);
REGISTER_PARSER (ADX, adx);
+ REGISTER_PARSER (BMP, bmp);
REGISTER_PARSER (CAVSVIDEO, cavsvideo);
REGISTER_PARSER (COOK, cook);
REGISTER_PARSER (DCA, dca);
diff --git a/libavcodec/bmp_parser.c b/libavcodec/bmp_parser.c
new file mode 100644
index 0000000..d9d14e4
--- /dev/null
+++ b/libavcodec/bmp_parser.c
@@ -0,0 +1,91 @@
+/*
+ * BMP parser
+ * Copyright (c) 2012 Paul B Mahol
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * BMP parser
+ */
+
+#include "libavutil/bswap.h"
+#include "parser.h"
+
+typedef struct BMPParseContext {
+ ParseContext pc;
+ uint32_t fsize;
+ uint32_t remaining_size;
+} BMPParseContext;
+
+static int bmp_parse(AVCodecParserContext *s, AVCodecContext *avctx,
+ const uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size)
+{
+ BMPParseContext *bpc = s->priv_data;
+ uint64_t state = bpc->pc.state64;
+ int next = END_NOT_FOUND;
+ int i = 0;
+
+ s->pict_type = AV_PICTURE_TYPE_NONE;
+
+ *poutbuf_size = 0;
+ if (buf_size == 0)
+ return 0;
+
+ if (!bpc->pc.frame_start_found) {
+ for (; i < buf_size; i++) {
+ state = (state << 8) | buf[i];
+ if ((state >> 48) == (('B' << 8) | 'M')) {
+ bpc->fsize = av_bswap32(state >> 16);
+ bpc->pc.frame_start_found = 1;
+ if (bpc->fsize > buf_size - i + 7)
+ bpc->remaining_size = bpc->fsize - buf_size + i - 7;
+ else
+ next = bpc->fsize + i - 7;
+ break;
+ }
+ }
+ bpc->pc.state64 = state;
+ } else {
+ if (bpc->remaining_size) {
+ i = FFMIN(bpc->remaining_size, buf_size);
+ bpc->remaining_size -= i;
+ if (bpc->remaining_size)
+ goto flush;
+ next = i;
+ }
+ }
+
+flush:
+ if (ff_combine_frame(&bpc->pc, next, &buf, &buf_size) < 0)
+ return buf_size;
+
+ bpc->pc.frame_start_found = 0;
+
+ *poutbuf = buf;
+ *poutbuf_size = buf_size;
+ return next;
+}
+
+AVCodecParser ff_bmp_parser = {
+ .codec_ids = { CODEC_ID_BMP },
+ .priv_data_size = sizeof(BMPParseContext),
+ .parser_parse = bmp_parse,
+ .parser_close = ff_parse_close,
+};
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 6794d85..1f2af62 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -27,7 +27,7 @@
*/
#define LIBAVCODEC_VERSION_MAJOR 54
-#define LIBAVCODEC_VERSION_MINOR 49
+#define LIBAVCODEC_VERSION_MINOR 50
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
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