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avcodec: add PFM image decoder

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This commit is contained in:
Paul B Mahol 2020-05-27 16:42:24 +02:00
parent 4391289609
commit d49db99ce2
10 changed files with 87 additions and 5 deletions
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1
Changelog
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@ -72,6 +72,7 @@ version <next>:
- MediaFoundation encoder wrapper
- untile filter
- Simon & Schuster Interactive ADPCM encoder
- PFM decoder
version 4.2:

1
libavcodec/Makefile
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@ -530,6 +530,7 @@ OBJS-$(CONFIG_PBM_DECODER) += pnmdec.o pnm.o
OBJS-$(CONFIG_PBM_ENCODER) += pnmenc.o
OBJS-$(CONFIG_PCX_DECODER) += pcx.o
OBJS-$(CONFIG_PCX_ENCODER) += pcxenc.o
OBJS-$(CONFIG_PFM_DECODER) += pnmdec.o pnm.o
OBJS-$(CONFIG_PGM_DECODER) += pnmdec.o pnm.o
OBJS-$(CONFIG_PGM_ENCODER) += pnmenc.o
OBJS-$(CONFIG_PGMYUV_DECODER) += pnmdec.o pnm.o

1
libavcodec/allcodecs.c
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@ -233,6 +233,7 @@ extern AVCodec ff_pbm_encoder;
extern AVCodec ff_pbm_decoder;
extern AVCodec ff_pcx_encoder;
extern AVCodec ff_pcx_decoder;
extern AVCodec ff_pfm_decoder;
extern AVCodec ff_pgm_encoder;
extern AVCodec ff_pgm_decoder;
extern AVCodec ff_pgmyuv_encoder;

7
libavcodec/codec_desc.c
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@ -1770,6 +1770,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
.long_name = NULL_IF_CONFIG_SMALL("NotchLC"),
.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
},
{
.id = AV_CODEC_ID_PFM,
.type = AVMEDIA_TYPE_VIDEO,
.name = "pfm",
.long_name = NULL_IF_CONFIG_SMALL("PFM (Portable FloatMap) image"),
.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSLESS,
},
/* various PCM "codecs" */
{

1
libavcodec/codec_id.h
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@ -294,6 +294,7 @@ enum AVCodecID {
AV_CODEC_ID_CDTOONS,
AV_CODEC_ID_MV30,
AV_CODEC_ID_NOTCHLC,
AV_CODEC_ID_PFM,
/* various PCM "codecs" */
AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs

21
libavcodec/pnm.c
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@ -24,6 +24,7 @@
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/avstring.h"
#include "avcodec.h"
#include "internal.h"
#include "pnm.h"
@ -69,8 +70,9 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
if (s->bytestream_end - s->bytestream < 3 ||
s->bytestream[0] != 'P' ||
s->bytestream[1] < '1' ||
s->bytestream[1] > '7') {
(s->bytestream[1] < '1' ||
s->bytestream[1] > '7' &&
s->bytestream[1] != 'F')) {
s->bytestream += s->bytestream_end > s->bytestream;
s->bytestream += s->bytestream_end > s->bytestream;
return AVERROR_INVALIDDATA;
@ -78,7 +80,9 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
pnm_get(s, buf1, sizeof(buf1));
s->type= buf1[1]-'0';
if (s->type==1 || s->type==4) {
if (buf1[1] == 'F') {
avctx->pix_fmt = AV_PIX_FMT_GBRPF32;
} else if (s->type==1 || s->type==4) {
avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
} else if (s->type==2 || s->type==5) {
if (avctx->codec_id == AV_CODEC_ID_PGMYUV)
@ -173,7 +177,16 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
if (ret < 0)
return ret;
if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE && avctx->pix_fmt != AV_PIX_FMT_MONOBLACK) {
if (avctx->pix_fmt == AV_PIX_FMT_GBRPF32) {
pnm_get(s, buf1, sizeof(buf1));
if (av_sscanf(buf1, "%f", &s->scale) != 1) {
av_log(avctx, AV_LOG_ERROR, "Invalid scale.\n");
return AVERROR_INVALIDDATA;
}
s->endian = s->scale < 0.f;
s->scale = fabsf(s->scale);
s->maxval = (1ULL << 32) - 1;
} else if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE && avctx->pix_fmt != AV_PIX_FMT_MONOBLACK) {
pnm_get(s, buf1, sizeof(buf1));
s->maxval = atoi(buf1);
if (s->maxval <= 0 || s->maxval > UINT16_MAX) {

2
libavcodec/pnm.h
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@ -30,6 +30,8 @@ typedef struct PNMContext {
uint8_t *bytestream_end;
int maxval; ///< maximum value of a pixel
int type;
int endian;
float scale;
} PNMContext;
int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s);

55
libavcodec/pnmdec.c
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@ -46,6 +46,7 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
int i, j, k, n, linesize, h, upgrade = 0, is_mono = 0;
unsigned char *ptr;
int components, sample_len, ret;
float scale;
s->bytestream_start =
s->bytestream = (uint8_t *)buf;
@ -254,6 +255,48 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
}
}
break;
case AV_PIX_FMT_GBRPF32:
if (avctx->width * avctx->height * 12 > s->bytestream_end - s->bytestream)
return AVERROR_INVALIDDATA;
scale = 1.f / s->scale;
if (s->endian) {
float *r, *g, *b;
r = (float *)p->data[2];
g = (float *)p->data[0];
b = (float *)p->data[1];
for (int i = 0; i < avctx->height; i++) {
for (int j = 0; j < avctx->width; j++) {
r[j] = av_int2float(av_le2ne32(((uint32_t *)s->bytestream)[0])) * scale;
g[j] = av_int2float(av_le2ne32(((uint32_t *)s->bytestream)[4])) * scale;
b[j] = av_int2float(av_le2ne32(((uint32_t *)s->bytestream)[8])) * scale;
s->bytestream += 12;
}
r += p->linesize[2] / 4;
g += p->linesize[0] / 4;
b += p->linesize[1] / 4;
}
} else {
float *r, *g, *b;
r = (float *)p->data[2];
g = (float *)p->data[0];
b = (float *)p->data[1];
for (int i = 0; i < avctx->height; i++) {
for (int j = 0; j < avctx->width; j++) {
r[j] = av_int2float(av_be2ne32(((uint32_t *)s->bytestream)[0])) * scale;
g[j] = av_int2float(av_be2ne32(((uint32_t *)s->bytestream)[4])) * scale;
b[j] = av_int2float(av_be2ne32(((uint32_t *)s->bytestream)[8])) * scale;
s->bytestream += 12;
}
r += p->linesize[2] / 4;
g += p->linesize[0] / 4;
b += p->linesize[1] / 4;
}
}
break;
}
*got_frame = 1;
@ -320,3 +363,15 @@ AVCodec ff_pam_decoder = {
.capabilities = AV_CODEC_CAP_DR1,
};
#endif
#if CONFIG_PFM_DECODER
AVCodec ff_pfm_decoder = {
.name = "pfm",
.long_name = NULL_IF_CONFIG_SMALL("PFM (Portable FloatMap) image"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_PFM,
.priv_data_size = sizeof(PNMContext),
.decode = pnm_decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
};
#endif

2
libavcodec/version.h
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@ -28,7 +28,7 @@
#include "libavutil/version.h"
#define LIBAVCODEC_VERSION_MAJOR 58
#define LIBAVCODEC_VERSION_MINOR 89
#define LIBAVCODEC_VERSION_MINOR 90
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \

1
libavformat/img2.c
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@ -40,6 +40,7 @@ const IdStrMap ff_img_tags[] = {
{ AV_CODEC_ID_PGMYUV, "pgmyuv" },
{ AV_CODEC_ID_PBM, "pbm" },
{ AV_CODEC_ID_PAM, "pam" },
{ AV_CODEC_ID_PFM, "pfm" },
{ AV_CODEC_ID_ALIAS_PIX, "pix" },
{ AV_CODEC_ID_DDS, "dds" },
{ AV_CODEC_ID_MPEG1VIDEO, "mpg1-img" },