#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.
#include <assert.h>
#include "libavutil/imgutils.h"
+#include "libavutil/opt.h"
#include "avcodec.h"
#include "dsputil.h"
#include "mjpeg.h"
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);
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,
.capabilities = CODEC_CAP_DR1,
.max_lowres = 3,
.long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
+ .priv_class = &mjpegdec_class,
};
AVCodec ff_thp_decoder = {
#ifndef AVCODEC_MJPEGDEC_H
#define AVCODEC_MJPEGDEC_H
+#include "libavutil/log.h"
+
#include "avcodec.h"
#include "get_bits.h"
#include "dsputil.h"
#define MAX_COMPONENTS 4
typedef struct MJpegDecodeContext {
+ AVClass *class;
AVCodecContext *avctx;
GetBitContext gb;
uint16_t (*ljpeg_buffer)[4];
unsigned int ljpeg_buffer_size;
+
+ int extern_huff;
} MJpegDecodeContext;
int ff_mjpeg_decode_init(AVCodecContext *avctx);
{"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"},
#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 */