subject:"\[FFmpeg\-devel\] \[PATCH v6 1\/2\] libavcodec\/pgxdec\: Add PGX decoder"

Re: [FFmpeg-devel] [PATCH v6 1/2] libavcodec/pgxdec: Add PGX decoder

2020-07-01 Thread Gautam Ramakrishnan

On Wed, Jul 1, 2020 at 6:10 PM Nicolas George  wrote:
>
> gautamr...@gmail.com (12020-06-30):
> > From: Gautam Ramakrishnan 
> >
> > This patch adds a pgx decoder.
> > ---
> >  Changelog   |   1 +
> >  doc/general.texi|   2 +
> >  libavcodec/Makefile |   1 +
> >  libavcodec/allcodecs.c  |   1 +
> >  libavcodec/codec_desc.c |   7 ++
> >  libavcodec/codec_id.h   |   1 +
> >  libavcodec/pgxdec.c | 199 
> >  libavcodec/version.h|   2 +-
> >  8 files changed, 213 insertions(+), 1 deletion(-)
> >  create mode 100644 libavcodec/pgxdec.c
> >
> > diff --git a/Changelog b/Changelog
> > index a60e7d2eb8..1bb9931c0d 100644
> > --- a/Changelog
> > +++ b/Changelog
> > @@ -4,6 +4,7 @@ releases are sorted from youngest to oldest.
> >  version :
> >  - AudioToolbox output device
> >  - MacCaption demuxer
> > +- PGX decoder
> >
> >
> >  version 4.3:
> > diff --git a/doc/general.texi b/doc/general.texi
> > index ea34b963b5..53d556c56c 100644
> > --- a/doc/general.texi
> > +++ b/doc/general.texi
> > @@ -751,6 +751,8 @@ following image formats are supported:
> >  @tab Portable GrayMap image
> >  @item PGMYUV   @tab X @tab X
> >  @tab PGM with U and V components in YUV 4:2:0
>
> > +@item PGX  @tab   @tab X
> > +@tab PGX file decoder
> >  @item PIC  @tab @tab X
> >  @tab Pictor/PC Paint
> >  @item PNG  @tab X @tab X
> > diff --git a/libavcodec/Makefile b/libavcodec/Makefile
> > index 5a6ea59715..12aa43fe51 100644
> > --- a/libavcodec/Makefile
> > +++ b/libavcodec/Makefile
> > @@ -536,6 +536,7 @@ OBJS-$(CONFIG_PGM_ENCODER) += pnmenc.o
> >  OBJS-$(CONFIG_PGMYUV_DECODER)  += pnmdec.o pnm.o
> >  OBJS-$(CONFIG_PGMYUV_ENCODER)  += pnmenc.o
> >  OBJS-$(CONFIG_PGSSUB_DECODER)  += pgssubdec.o
> > +OBJS-$(CONFIG_PGX_DECODER) += pgxdec.o
> >  OBJS-$(CONFIG_PICTOR_DECODER)  += pictordec.o cga_data.o
> >  OBJS-$(CONFIG_PIXLET_DECODER)  += pixlet.o
> >  OBJS-$(CONFIG_PJS_DECODER) += textdec.o ass.o
> > diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
> > index fa0c08d42e..a5048290f7 100644
> > --- a/libavcodec/allcodecs.c
> > +++ b/libavcodec/allcodecs.c
> > @@ -238,6 +238,7 @@ extern AVCodec ff_pgm_encoder;
> >  extern AVCodec ff_pgm_decoder;
> >  extern AVCodec ff_pgmyuv_encoder;
> >  extern AVCodec ff_pgmyuv_decoder;
> > +extern AVCodec ff_pgx_decoder;
> >  extern AVCodec ff_pictor_decoder;
> >  extern AVCodec ff_pixlet_decoder;
> >  extern AVCodec ff_png_encoder;
> > diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c
> > index 9f8847544f..67e0a3055c 100644
> > --- a/libavcodec/codec_desc.c
> > +++ b/libavcodec/codec_desc.c
> > @@ -1405,6 +1405,13 @@ static const AVCodecDescriptor codec_descriptors[] = 
> > {
> >  .long_name = NULL_IF_CONFIG_SMALL("AVS2-P2/IEEE1857.4"),
> >  .props = AV_CODEC_PROP_LOSSY,
> >  },
> > +{
> > +.id= AV_CODEC_ID_PGX,
> > +.type  = AVMEDIA_TYPE_VIDEO,
> > +.name  = "pgx",
> > +.long_name = NULL_IF_CONFIG_SMALL("PGX (JPEG2000 Test Format)"),
> > +.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSLESS,
> > +},
> >  {
> >  .id= AV_CODEC_ID_Y41P,
> >  .type  = AVMEDIA_TYPE_VIDEO,
> > diff --git a/libavcodec/codec_id.h b/libavcodec/codec_id.h
> > index d885962c9c..896ecb0ce0 100644
> > --- a/libavcodec/codec_id.h
> > +++ b/libavcodec/codec_id.h
> > @@ -241,6 +241,7 @@ enum AVCodecID {
> >  AV_CODEC_ID_SCREENPRESSO,
> >  AV_CODEC_ID_RSCC,
> >  AV_CODEC_ID_AVS2,
> > +AV_CODEC_ID_PGX,
> >
> >  AV_CODEC_ID_Y41P = 0x8000,
> >  AV_CODEC_ID_AVRP,
> > diff --git a/libavcodec/pgxdec.c b/libavcodec/pgxdec.c
> > new file mode 100644
> > index 00..c9e07c1e55
> > --- /dev/null
> > +++ b/libavcodec/pgxdec.c
> > @@ -0,0 +1,199 @@
> > +/*
> > + * PGX image format
> > + * Copyright (c) 2020 Gautam Ramakrishnan
> > + *
> > + * 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 "internal.h"
> > +#include "bytestream.h"
> > +#include "libavutil/imgutil

Re: [FFmpeg-devel] [PATCH v6 1/2] libavcodec/pgxdec: Add PGX decoder

2020-07-01 Thread Nicolas George

gautamr...@gmail.com (12020-06-30):
> From: Gautam Ramakrishnan 
> 
> This patch adds a pgx decoder.
> ---
>  Changelog   |   1 +
>  doc/general.texi|   2 +
>  libavcodec/Makefile |   1 +
>  libavcodec/allcodecs.c  |   1 +
>  libavcodec/codec_desc.c |   7 ++
>  libavcodec/codec_id.h   |   1 +
>  libavcodec/pgxdec.c | 199 
>  libavcodec/version.h|   2 +-
>  8 files changed, 213 insertions(+), 1 deletion(-)
>  create mode 100644 libavcodec/pgxdec.c
> 
> diff --git a/Changelog b/Changelog
> index a60e7d2eb8..1bb9931c0d 100644
> --- a/Changelog
> +++ b/Changelog
> @@ -4,6 +4,7 @@ releases are sorted from youngest to oldest.
>  version :
>  - AudioToolbox output device
>  - MacCaption demuxer
> +- PGX decoder
>  
>  
>  version 4.3:
> diff --git a/doc/general.texi b/doc/general.texi
> index ea34b963b5..53d556c56c 100644
> --- a/doc/general.texi
> +++ b/doc/general.texi
> @@ -751,6 +751,8 @@ following image formats are supported:
>  @tab Portable GrayMap image
>  @item PGMYUV   @tab X @tab X
>  @tab PGM with U and V components in YUV 4:2:0

> +@item PGX  @tab   @tab X
> +@tab PGX file decoder
>  @item PIC  @tab @tab X
>  @tab Pictor/PC Paint
>  @item PNG  @tab X @tab X
> diff --git a/libavcodec/Makefile b/libavcodec/Makefile
> index 5a6ea59715..12aa43fe51 100644
> --- a/libavcodec/Makefile
> +++ b/libavcodec/Makefile
> @@ -536,6 +536,7 @@ OBJS-$(CONFIG_PGM_ENCODER) += pnmenc.o
>  OBJS-$(CONFIG_PGMYUV_DECODER)  += pnmdec.o pnm.o
>  OBJS-$(CONFIG_PGMYUV_ENCODER)  += pnmenc.o
>  OBJS-$(CONFIG_PGSSUB_DECODER)  += pgssubdec.o
> +OBJS-$(CONFIG_PGX_DECODER) += pgxdec.o
>  OBJS-$(CONFIG_PICTOR_DECODER)  += pictordec.o cga_data.o
>  OBJS-$(CONFIG_PIXLET_DECODER)  += pixlet.o
>  OBJS-$(CONFIG_PJS_DECODER) += textdec.o ass.o
> diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
> index fa0c08d42e..a5048290f7 100644
> --- a/libavcodec/allcodecs.c
> +++ b/libavcodec/allcodecs.c
> @@ -238,6 +238,7 @@ extern AVCodec ff_pgm_encoder;
>  extern AVCodec ff_pgm_decoder;
>  extern AVCodec ff_pgmyuv_encoder;
>  extern AVCodec ff_pgmyuv_decoder;
> +extern AVCodec ff_pgx_decoder;
>  extern AVCodec ff_pictor_decoder;
>  extern AVCodec ff_pixlet_decoder;
>  extern AVCodec ff_png_encoder;
> diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c
> index 9f8847544f..67e0a3055c 100644
> --- a/libavcodec/codec_desc.c
> +++ b/libavcodec/codec_desc.c
> @@ -1405,6 +1405,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
>  .long_name = NULL_IF_CONFIG_SMALL("AVS2-P2/IEEE1857.4"),
>  .props = AV_CODEC_PROP_LOSSY,
>  },
> +{
> +.id= AV_CODEC_ID_PGX,
> +.type  = AVMEDIA_TYPE_VIDEO,
> +.name  = "pgx",
> +.long_name = NULL_IF_CONFIG_SMALL("PGX (JPEG2000 Test Format)"),
> +.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSLESS,
> +},
>  {
>  .id= AV_CODEC_ID_Y41P,
>  .type  = AVMEDIA_TYPE_VIDEO,
> diff --git a/libavcodec/codec_id.h b/libavcodec/codec_id.h
> index d885962c9c..896ecb0ce0 100644
> --- a/libavcodec/codec_id.h
> +++ b/libavcodec/codec_id.h
> @@ -241,6 +241,7 @@ enum AVCodecID {
>  AV_CODEC_ID_SCREENPRESSO,
>  AV_CODEC_ID_RSCC,
>  AV_CODEC_ID_AVS2,
> +AV_CODEC_ID_PGX,
>  
>  AV_CODEC_ID_Y41P = 0x8000,
>  AV_CODEC_ID_AVRP,
> diff --git a/libavcodec/pgxdec.c b/libavcodec/pgxdec.c
> new file mode 100644
> index 00..c9e07c1e55
> --- /dev/null
> +++ b/libavcodec/pgxdec.c
> @@ -0,0 +1,199 @@
> +/*
> + * PGX image format
> + * Copyright (c) 2020 Gautam Ramakrishnan
> + *
> + * 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 "internal.h"
> +#include "bytestream.h"
> +#include "libavutil/imgutils.h"
> +
> +typedef struct PGXContext {

> +GetByteContext  g;

Double space.

And this gets inited for each frame: it could be a local variable too.

Or even better: get rid of the GetByteContext entirely: the way you use
it, it brings no benefit at all.

> +} PGXContext;
> +

> +static int pgx_get_num

Re: [FFmpeg-devel] [PATCH v6 1/2] libavcodec/pgxdec: Add PGX decoder

2020-07-01 Thread Michael Niedermayer

On Tue, Jun 30, 2020 at 07:23:46PM +0530, gautamr...@gmail.com wrote:
> From: Gautam Ramakrishnan 
> 
> This patch adds a pgx decoder.
> ---
>  Changelog   |   1 +
>  doc/general.texi|   2 +
>  libavcodec/Makefile |   1 +
>  libavcodec/allcodecs.c  |   1 +
>  libavcodec/codec_desc.c |   7 ++
>  libavcodec/codec_id.h   |   1 +
>  libavcodec/pgxdec.c | 199 
>  libavcodec/version.h|   2 +-
>  8 files changed, 213 insertions(+), 1 deletion(-)
>  create mode 100644 libavcodec/pgxdec.c
> 
> diff --git a/Changelog b/Changelog
> index a60e7d2eb8..1bb9931c0d 100644
> --- a/Changelog
> +++ b/Changelog
> @@ -4,6 +4,7 @@ releases are sorted from youngest to oldest.
>  version :
>  - AudioToolbox output device
>  - MacCaption demuxer
> +- PGX decoder
>  
>  
>  version 4.3:
> diff --git a/doc/general.texi b/doc/general.texi
> index ea34b963b5..53d556c56c 100644
> --- a/doc/general.texi
> +++ b/doc/general.texi
> @@ -751,6 +751,8 @@ following image formats are supported:
>  @tab Portable GrayMap image
>  @item PGMYUV   @tab X @tab X
>  @tab PGM with U and V components in YUV 4:2:0
> +@item PGX  @tab   @tab X
> +@tab PGX file decoder
>  @item PIC  @tab @tab X
>  @tab Pictor/PC Paint
>  @item PNG  @tab X @tab X
> diff --git a/libavcodec/Makefile b/libavcodec/Makefile
> index 5a6ea59715..12aa43fe51 100644
> --- a/libavcodec/Makefile
> +++ b/libavcodec/Makefile
> @@ -536,6 +536,7 @@ OBJS-$(CONFIG_PGM_ENCODER) += pnmenc.o
>  OBJS-$(CONFIG_PGMYUV_DECODER)  += pnmdec.o pnm.o
>  OBJS-$(CONFIG_PGMYUV_ENCODER)  += pnmenc.o
>  OBJS-$(CONFIG_PGSSUB_DECODER)  += pgssubdec.o
> +OBJS-$(CONFIG_PGX_DECODER) += pgxdec.o
>  OBJS-$(CONFIG_PICTOR_DECODER)  += pictordec.o cga_data.o
>  OBJS-$(CONFIG_PIXLET_DECODER)  += pixlet.o
>  OBJS-$(CONFIG_PJS_DECODER) += textdec.o ass.o
> diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
> index fa0c08d42e..a5048290f7 100644
> --- a/libavcodec/allcodecs.c
> +++ b/libavcodec/allcodecs.c
> @@ -238,6 +238,7 @@ extern AVCodec ff_pgm_encoder;
>  extern AVCodec ff_pgm_decoder;
>  extern AVCodec ff_pgmyuv_encoder;
>  extern AVCodec ff_pgmyuv_decoder;
> +extern AVCodec ff_pgx_decoder;
>  extern AVCodec ff_pictor_decoder;
>  extern AVCodec ff_pixlet_decoder;
>  extern AVCodec ff_png_encoder;
> diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c
> index 9f8847544f..67e0a3055c 100644
> --- a/libavcodec/codec_desc.c
> +++ b/libavcodec/codec_desc.c
> @@ -1405,6 +1405,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
>  .long_name = NULL_IF_CONFIG_SMALL("AVS2-P2/IEEE1857.4"),
>  .props = AV_CODEC_PROP_LOSSY,
>  },
> +{
> +.id= AV_CODEC_ID_PGX,
> +.type  = AVMEDIA_TYPE_VIDEO,
> +.name  = "pgx",
> +.long_name = NULL_IF_CONFIG_SMALL("PGX (JPEG2000 Test Format)"),
> +.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSLESS,
> +},
>  {
>  .id= AV_CODEC_ID_Y41P,
>  .type  = AVMEDIA_TYPE_VIDEO,
> diff --git a/libavcodec/codec_id.h b/libavcodec/codec_id.h
> index d885962c9c..896ecb0ce0 100644
> --- a/libavcodec/codec_id.h
> +++ b/libavcodec/codec_id.h
> @@ -241,6 +241,7 @@ enum AVCodecID {
>  AV_CODEC_ID_SCREENPRESSO,
>  AV_CODEC_ID_RSCC,
>  AV_CODEC_ID_AVS2,
> +AV_CODEC_ID_PGX,
>  
>  AV_CODEC_ID_Y41P = 0x8000,
>  AV_CODEC_ID_AVRP,
> diff --git a/libavcodec/pgxdec.c b/libavcodec/pgxdec.c
> new file mode 100644
> index 00..c9e07c1e55
> --- /dev/null
> +++ b/libavcodec/pgxdec.c
> @@ -0,0 +1,199 @@
> +/*
> + * PGX image format
> + * Copyright (c) 2020 Gautam Ramakrishnan
> + *
> + * 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 "internal.h"
> +#include "bytestream.h"
> +#include "libavutil/imgutils.h"
> +
> +typedef struct PGXContext {
> +GetByteContext  g;
> +} PGXContext;
> +
> +static int pgx_get_number(AVCodecContext *avctx, PGXContext * const s) {
> +int ret = -1;
> +char digit;
> +
> +while (1) {
> +uint64_t temp;
> +if (!bytestr

[FFmpeg-devel] [PATCH v6 1/2] libavcodec/pgxdec: Add PGX decoder

2020-06-30 Thread gautamramk

From: Gautam Ramakrishnan 

This patch adds a pgx decoder.
---
 Changelog   |   1 +
 doc/general.texi|   2 +
 libavcodec/Makefile |   1 +
 libavcodec/allcodecs.c  |   1 +
 libavcodec/codec_desc.c |   7 ++
 libavcodec/codec_id.h   |   1 +
 libavcodec/pgxdec.c | 199 
 libavcodec/version.h|   2 +-
 8 files changed, 213 insertions(+), 1 deletion(-)
 create mode 100644 libavcodec/pgxdec.c

diff --git a/Changelog b/Changelog
index a60e7d2eb8..1bb9931c0d 100644
--- a/Changelog
+++ b/Changelog
@@ -4,6 +4,7 @@ releases are sorted from youngest to oldest.
 version :
 - AudioToolbox output device
 - MacCaption demuxer
+- PGX decoder
 
 
 version 4.3:
diff --git a/doc/general.texi b/doc/general.texi
index ea34b963b5..53d556c56c 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -751,6 +751,8 @@ following image formats are supported:
 @tab Portable GrayMap image
 @item PGMYUV   @tab X @tab X
 @tab PGM with U and V components in YUV 4:2:0
+@item PGX  @tab   @tab X
+@tab PGX file decoder
 @item PIC  @tab @tab X
 @tab Pictor/PC Paint
 @item PNG  @tab X @tab X
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 5a6ea59715..12aa43fe51 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -536,6 +536,7 @@ OBJS-$(CONFIG_PGM_ENCODER) += pnmenc.o
 OBJS-$(CONFIG_PGMYUV_DECODER)  += pnmdec.o pnm.o
 OBJS-$(CONFIG_PGMYUV_ENCODER)  += pnmenc.o
 OBJS-$(CONFIG_PGSSUB_DECODER)  += pgssubdec.o
+OBJS-$(CONFIG_PGX_DECODER) += pgxdec.o
 OBJS-$(CONFIG_PICTOR_DECODER)  += pictordec.o cga_data.o
 OBJS-$(CONFIG_PIXLET_DECODER)  += pixlet.o
 OBJS-$(CONFIG_PJS_DECODER) += textdec.o ass.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index fa0c08d42e..a5048290f7 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -238,6 +238,7 @@ extern AVCodec ff_pgm_encoder;
 extern AVCodec ff_pgm_decoder;
 extern AVCodec ff_pgmyuv_encoder;
 extern AVCodec ff_pgmyuv_decoder;
+extern AVCodec ff_pgx_decoder;
 extern AVCodec ff_pictor_decoder;
 extern AVCodec ff_pixlet_decoder;
 extern AVCodec ff_png_encoder;
diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c
index 9f8847544f..67e0a3055c 100644
--- a/libavcodec/codec_desc.c
+++ b/libavcodec/codec_desc.c
@@ -1405,6 +1405,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
 .long_name = NULL_IF_CONFIG_SMALL("AVS2-P2/IEEE1857.4"),
 .props = AV_CODEC_PROP_LOSSY,
 },
+{
+.id= AV_CODEC_ID_PGX,
+.type  = AVMEDIA_TYPE_VIDEO,
+.name  = "pgx",
+.long_name = NULL_IF_CONFIG_SMALL("PGX (JPEG2000 Test Format)"),
+.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSLESS,
+},
 {
 .id= AV_CODEC_ID_Y41P,
 .type  = AVMEDIA_TYPE_VIDEO,
diff --git a/libavcodec/codec_id.h b/libavcodec/codec_id.h
index d885962c9c..896ecb0ce0 100644
--- a/libavcodec/codec_id.h
+++ b/libavcodec/codec_id.h
@@ -241,6 +241,7 @@ enum AVCodecID {
 AV_CODEC_ID_SCREENPRESSO,
 AV_CODEC_ID_RSCC,
 AV_CODEC_ID_AVS2,
+AV_CODEC_ID_PGX,
 
 AV_CODEC_ID_Y41P = 0x8000,
 AV_CODEC_ID_AVRP,
diff --git a/libavcodec/pgxdec.c b/libavcodec/pgxdec.c
new file mode 100644
index 00..c9e07c1e55
--- /dev/null
+++ b/libavcodec/pgxdec.c
@@ -0,0 +1,199 @@
+/*
+ * PGX image format
+ * Copyright (c) 2020 Gautam Ramakrishnan
+ *
+ * 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 "internal.h"
+#include "bytestream.h"
+#include "libavutil/imgutils.h"
+
+typedef struct PGXContext {
+GetByteContext  g;
+} PGXContext;
+
+static int pgx_get_number(AVCodecContext *avctx, PGXContext * const s) {
+int ret = -1;
+char digit;
+
+while (1) {
+uint64_t temp;
+if (!bytestream2_get_bytes_left(&s->g))
+return -1;
+digit = bytestream2_get_byte(&s->g);
+if (digit == ' ' || digit == 0xA || digit == 0xD)
+break;
+else if (digit < '0' || digit > '9')
+return -1;
+
+if (ret < 0)
+ret = 0;
+
+temp = 10L * ret + (digit - '0');
+

Re: [FFmpeg-devel] [PATCH v6 1/2] libavcodec/pgxdec: Add PGX decoder

Re: [FFmpeg-devel] [PATCH v6 1/2] libavcodec/pgxdec: Add PGX decoder

Re: [FFmpeg-devel] [PATCH v6 1/2] libavcodec/pgxdec: Add PGX decoder

[FFmpeg-devel] [PATCH v6 1/2] libavcodec/pgxdec: Add PGX decoder

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