[FFmpeg-cvslog] mjpegdec: add 'extern_huff' private option.

[Anton Khirnov]

ffmpeg | branch: master | Anton Khirnov <anton at khirnov.net> | Sat Aug 27 10:16:14 2011 +0200| [1f0c7020a1f08a7cbec2d629759ca33ea92bd89d] | committer: Anton Khirnov

mjpegdec: add 'extern_huff' private option.

Deprecate CODEC_FLAG_EXTERN_HUFF

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=1f0c7020a1f08a7cbec2d629759ca33ea92bd89d
---

 libavcodec/avcodec.h  |    2 ++
 libavcodec/mjpegdec.c |   20 ++++++++++++++++++++
 libavcodec/mjpegdec.h |    5 +++++
 libavcodec/options.c  |    2 ++
 libavcodec/version.h  |    3 +++
 5 files changed, 32 insertions(+), 0 deletions(-)

diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 6cee81e..f65c14d 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -581,7 +581,9 @@ typedef struct RcOverride{
 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
 #define CODEC_FLAG_PASS1           0x0200   ///< Use internal 2pass ratecontrol in first pass mode.
 #define CODEC_FLAG_PASS2           0x0400   ///< Use internal 2pass ratecontrol in second pass mode.
+#if FF_API_MJPEG_GLOBAL_OPTS
 #define CODEC_FLAG_EXTERN_HUFF     0x1000   ///< Use external Huffman table (for MJPEG).
+#endif
 #define CODEC_FLAG_GRAY            0x2000   ///< Only decode/encode grayscale.
 #define CODEC_FLAG_EMU_EDGE        0x4000   ///< Don't draw edges.
 #define CODEC_FLAG_PSNR            0x8000   ///< error[?] variables will be set during encoding.
diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c
index b9db777..168cc0b 100644
--- a/libavcodec/mjpegdec.c
+++ b/libavcodec/mjpegdec.c
@@ -34,6 +34,7 @@
 #include <assert.h>
 
 #include "libavutil/imgutils.h"
+#include "libavutil/opt.h"
 #include "avcodec.h"
 #include "dsputil.h"
 #include "mjpeg.h"
@@ -96,7 +97,11 @@ av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
 
     build_basic_mjpeg_vlc(s);
 
+#if FF_API_MJPEG_GLOBAL_OPTS
     if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
+        s->extern_huff = 1;
+#endif
+    if (s->extern_huff)
     {
         av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
         init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
@@ -1597,6 +1602,20 @@ av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
     return 0;
 }
 
+#define OFFSET(x) offsetof(MJpegDecodeContext, x)
+#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
+static const AVOption options[] = {
+    { "extern_huff",        "Use external huffman table.",  OFFSET(extern_huff), FF_OPT_TYPE_INT, { 0 }, 0, 1, VD },
+    { NULL },
+};
+
+static const AVClass mjpegdec_class = {
+    .class_name = "MJPEG decoder",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
 AVCodec ff_mjpeg_decoder = {
     .name           = "mjpeg",
     .type           = AVMEDIA_TYPE_VIDEO,
@@ -1608,6 +1627,7 @@ AVCodec ff_mjpeg_decoder = {
     .capabilities   = CODEC_CAP_DR1,
     .max_lowres = 3,
     .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
+    .priv_class     = &mjpegdec_class,
 };
 
 AVCodec ff_thp_decoder = {
diff --git a/libavcodec/mjpegdec.h b/libavcodec/mjpegdec.h
index 52c256e..bfa987d 100644
--- a/libavcodec/mjpegdec.h
+++ b/libavcodec/mjpegdec.h
@@ -29,6 +29,8 @@
 #ifndef AVCODEC_MJPEGDEC_H
 #define AVCODEC_MJPEGDEC_H
 
+#include "libavutil/log.h"
+
 #include "avcodec.h"
 #include "get_bits.h"
 #include "dsputil.h"
@@ -36,6 +38,7 @@
 #define MAX_COMPONENTS 4
 
 typedef struct MJpegDecodeContext {
+    AVClass *class;
     AVCodecContext *avctx;
     GetBitContext gb;
 
@@ -106,6 +109,8 @@ typedef struct MJpegDecodeContext {
 
     uint16_t (*ljpeg_buffer)[4];
     unsigned int ljpeg_buffer_size;
+
+    int extern_huff;
 } MJpegDecodeContext;
 
 int ff_mjpeg_decode_init(AVCodecContext *avctx);
diff --git a/libavcodec/options.c b/libavcodec/options.c
index 7828dc9..843064f 100644
--- a/libavcodec/options.c
+++ b/libavcodec/options.c
@@ -87,7 +87,9 @@ static const AVOption options[]={
 {"input_preserved", NULL, 0, FF_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_INPUT_PRESERVED }, INT_MIN, INT_MAX, 0, "flags"},
 {"pass1", "use internal 2pass ratecontrol in first  pass mode", 0, FF_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_PASS1 }, INT_MIN, INT_MAX, 0, "flags"},
 {"pass2", "use internal 2pass ratecontrol in second pass mode", 0, FF_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_PASS2 }, INT_MIN, INT_MAX, 0, "flags"},
+#if FF_API_MJPEG_GLOBAL_OPTS
 {"extern_huff", "use external huffman table (for mjpeg)", 0, FF_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_EXTERN_HUFF }, INT_MIN, INT_MAX, 0, "flags"},
+#endif
 {"gray", "only decode/encode grayscale", 0, FF_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_GRAY }, INT_MIN, INT_MAX, V|E|D, "flags"},
 {"emu_edge", "don't draw edges", 0, FF_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_EMU_EDGE }, INT_MIN, INT_MAX, 0, "flags"},
 {"psnr", "error[?] variables will be set during encoding", 0, FF_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_PSNR }, INT_MIN, INT_MAX, V|E, "flags"},
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 7abd993..d4c358e 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -95,5 +95,8 @@
 #ifndef FF_API_SNOW_GLOBAL_OPTS
 #define FF_API_SNOW_GLOBAL_OPTS  (LIBAVCODEC_VERSION_MAJOR < 54)
 #endif
+#ifndef FF_API_MJPEG_GLOBAL_OPTS
+#define FF_API_MJPEG_GLOBAL_OPTS (LIBAVCODEC_VERSION_MAJOR < 54)
+#endif
 
 #endif /* AVCODEC_VERSION_H */