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libxvid: Add SSIM displaying through a libxvidcore plugin

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Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
This commit is contained in:
Timothy Gu 2013-07-30 19:40:45 -07:00 committed by Vittorio Giovara
parent 5ce7ca68b8
commit c389a80494
3 changed files with 57 additions and 1 deletions
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37
doc/encoders.texi
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@ -518,6 +518,43 @@ be better than any of the two specified individually. In other
words, the resulting quality will be the worse one of the two
effects.
@item ssim
Set structural similarity (SSIM) displaying method. Possible values:
@table @samp
@item off
Disable displaying of SSIM information.
@item avg
Output average SSIM at the end of encoding to stdout. The format of
showing the average SSIM is:
@example
Average SSIM: %f
@end example
For users who are not familiar with C, %f means a float number, or
a decimal (e.g. 0.939232).
@item frame
Output both per-frame SSIM data during encoding and average SSIM at
the end of encoding to stdout. The format of per-frame information
is:
@example
SSIM: avg: %1.3f min: %1.3f max: %1.3f
@end example
For users who are not familiar with C, %1.3f means a float number
rounded to 3 digits after the dot (e.g. 0.932).
@end table
@item ssim_acc
Set SSIM accuracy. Valid options are integers within the range of
0-4, while 0 gives the most accurate result and 4 computes the
fastest.
@end table
@section libx264

19
libavcodec/libxvid.c
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@ -62,6 +62,8 @@ struct xvid_context {
unsigned char *inter_matrix; /**< I-Frame Quant Matrix */
int lumi_aq; /**< Lumi masking as an aq method */
int variance_aq; /**< Variance adaptive quantization */
int ssim; /**< SSIM information display mode */
int ssim_acc; /**< SSIM accuracy. 0: accurate. 4: fast. */
};
/**
@ -354,6 +356,7 @@ static av_cold int xvid_encode_init(AVCodecContext *avctx) {
xvid_plugin_2pass2_t rc2pass2 = { 0 };
xvid_plugin_lumimasking_t masking_l = { 0 }; /* For lumi masking */
xvid_plugin_lumimasking_t masking_v = { 0 }; /* For variance AQ */
xvid_plugin_ssim_t ssim = { 0 };
xvid_gbl_init_t xvid_gbl_init = { 0 };
xvid_enc_create_t xvid_enc_create = { 0 };
xvid_enc_plugin_t plugins[7];
@ -552,6 +555,17 @@ static av_cold int xvid_encode_init(AVCodecContext *avctx) {
xvid_enc_create.num_plugins++;
}
/* SSIM */
if (x->ssim) {
plugins[xvid_enc_create.num_plugins].func = xvid_plugin_ssim;
ssim.b_printstat = x->ssim == 2;
ssim.acc = x->ssim_acc;
ssim.cpu_flags = xvid_gbl_init.cpu_flags;
ssim.b_visualize = 0;
plugins[xvid_enc_create.num_plugins].param = &ssim;
xvid_enc_create.num_plugins++;
}
/* Frame Rate and Key Frames */
xvid_correct_framerate(avctx);
xvid_enc_create.fincr = avctx->time_base.num;
@ -780,6 +794,11 @@ static av_cold int xvid_encode_close(AVCodecContext *avctx) {
static const AVOption options[] = {
{ "lumi_aq", "Luminance masking AQ", OFFSET(lumi_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
{ "variance_aq", "Variance AQ", OFFSET(variance_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
{ "ssim", "Show SSIM information to stdout", OFFSET(ssim), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, VE, "ssim" },
{ "off", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, "ssim" },
{ "avg", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "ssim" },
{ "frame", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "ssim" },
{ "ssim_acc", "SSIM accuracy", OFFSET(ssim_acc), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, 4, VE },
{ NULL },
};

2
libavcodec/version.h
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@ -30,7 +30,7 @@
#define LIBAVCODEC_VERSION_MAJOR 55
#define LIBAVCODEC_VERSION_MINOR 45
#define LIBAVCODEC_VERSION_MICRO 1
#define LIBAVCODEC_VERSION_MICRO 2
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \