ffmpeg/libavcodec/pnmenc.c

321 lines
11 KiB
C

/*
* PNM image format
* Copyright (c) 2002, 2003 Fabrice Bellard
*
* 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 "config_components.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/imgutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/float2half.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "encode.h"
typedef struct PHMEncContext {
Float2HalfTables f2h_tables;
} PHMEncContext;
static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *p, int *got_packet)
{
PHMEncContext *s = avctx->priv_data;
uint8_t *bytestream, *bytestream_start, *bytestream_end;
int i, h, h1, c, n, linesize, ret;
int size = av_image_get_buffer_size(avctx->pix_fmt,
avctx->width, avctx->height, 1);
if (size < 0)
return size;
if ((ret = ff_get_encode_buffer(avctx, pkt, size + 200U, 0)) < 0)
return ret;
bytestream_start =
bytestream = pkt->data;
bytestream_end = pkt->data + pkt->size;
h = avctx->height;
h1 = h;
switch (avctx->pix_fmt) {
case AV_PIX_FMT_MONOWHITE:
c = '4';
n = (avctx->width + 7) >> 3;
break;
case AV_PIX_FMT_GRAY8:
c = '5';
n = avctx->width;
break;
case AV_PIX_FMT_GRAY16BE:
c = '5';
n = avctx->width * 2;
break;
case AV_PIX_FMT_RGB24:
c = '6';
n = avctx->width * 3;
break;
case AV_PIX_FMT_RGB48BE:
c = '6';
n = avctx->width * 6;
break;
case AV_PIX_FMT_YUV420P:
if (avctx->width & 1 || avctx->height & 1) {
av_log(avctx, AV_LOG_ERROR, "pgmyuv needs even width and height\n");
return AVERROR(EINVAL);
}
c = '5';
n = avctx->width;
h1 = (h * 3) / 2;
break;
case AV_PIX_FMT_YUV420P16BE:
c = '5';
n = avctx->width * 2;
h1 = (h * 3) / 2;
break;
case AV_PIX_FMT_GBRPF32BE:
case AV_PIX_FMT_GBRPF32LE:
if (avctx->codec_id == AV_CODEC_ID_PFM) {
c = 'F';
n = avctx->width * 4;
} else {
c = 'H';
n = avctx->width * 2;
}
break;
case AV_PIX_FMT_GRAYF32BE:
case AV_PIX_FMT_GRAYF32LE:
if (avctx->codec_id == AV_CODEC_ID_PFM) {
c = 'f';
n = avctx->width * 4;
} else {
c = 'h';
n = avctx->width * 2;
}
break;
default:
return -1;
}
snprintf(bytestream, bytestream_end - bytestream,
"P%c\n%d %d\n", c, avctx->width, h1);
bytestream += strlen(bytestream);
if (avctx->pix_fmt == AV_PIX_FMT_GBRPF32LE ||
avctx->pix_fmt == AV_PIX_FMT_GRAYF32LE ||
avctx->pix_fmt == AV_PIX_FMT_GBRPF32BE ||
avctx->pix_fmt == AV_PIX_FMT_GRAYF32BE)
snprintf(bytestream, bytestream_end - bytestream,
"%f\n", (avctx->pix_fmt == AV_PIX_FMT_GBRPF32BE ||
avctx->pix_fmt == AV_PIX_FMT_GRAYF32BE) ? 1.f: -1.f);
bytestream += strlen(bytestream);
if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE &&
avctx->pix_fmt != AV_PIX_FMT_GBRPF32LE &&
avctx->pix_fmt != AV_PIX_FMT_GRAYF32LE &&
avctx->pix_fmt != AV_PIX_FMT_GBRPF32BE &&
avctx->pix_fmt != AV_PIX_FMT_GRAYF32BE) {
int maxdepth = (1 << av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth) - 1;
snprintf(bytestream, bytestream_end - bytestream,
"%d\n", maxdepth);
bytestream += strlen(bytestream);
}
if ((avctx->pix_fmt == AV_PIX_FMT_GBRPF32LE ||
avctx->pix_fmt == AV_PIX_FMT_GBRPF32BE) && c == 'F') {
/* PFM is encoded from bottom to top */
const float *r = (const float *)(p->data[2] + p->linesize[2] * (avctx->height - 1));
const float *g = (const float *)(p->data[0] + p->linesize[0] * (avctx->height - 1));
const float *b = (const float *)(p->data[1] + p->linesize[1] * (avctx->height - 1));
for (int i = 0; i < avctx->height; i++) {
for (int j = 0; j < avctx->width; j++) {
AV_WN32(bytestream + 0, av_float2int(r[j]));
AV_WN32(bytestream + 4, av_float2int(g[j]));
AV_WN32(bytestream + 8, av_float2int(b[j]));
bytestream += 12;
}
r -= p->linesize[2] / 4;
g -= p->linesize[0] / 4;
b -= p->linesize[1] / 4;
}
} else if ((avctx->pix_fmt == AV_PIX_FMT_GRAYF32LE ||
avctx->pix_fmt == AV_PIX_FMT_GRAYF32BE) && c == 'f') {
/* PFM is encoded from bottom to top */
const float *g = (const float *)(p->data[0] + p->linesize[0] * (avctx->height - 1));
for (int i = 0; i < avctx->height; i++) {
for (int j = 0; j < avctx->width; j++) {
AV_WN32(bytestream, av_float2int(g[j]));
bytestream += 4;
}
g -= p->linesize[0] / 4;
}
} else if (avctx->pix_fmt == AV_PIX_FMT_GBRPF32 && c == 'H') {
const float *r = (const float *)p->data[2];
const float *g = (const float *)p->data[0];
const float *b = (const float *)p->data[1];
for (int i = 0; i < avctx->height; i++) {
for (int j = 0; j < avctx->width; j++) {
AV_WN16(bytestream + 0, float2half(av_float2int(r[j]), &s->f2h_tables));
AV_WN16(bytestream + 2, float2half(av_float2int(g[j]), &s->f2h_tables));
AV_WN16(bytestream + 4, float2half(av_float2int(b[j]), &s->f2h_tables));
bytestream += 6;
}
r += p->linesize[2] / 4;
g += p->linesize[0] / 4;
b += p->linesize[1] / 4;
}
} else if (avctx->pix_fmt == AV_PIX_FMT_GRAYF32 && c == 'h') {
const float *g = (const float *)p->data[0];
for (int i = 0; i < avctx->height; i++) {
for (int j = 0; j < avctx->width; j++) {
AV_WN16(bytestream, float2half(av_float2int(g[j]), &s->f2h_tables));
bytestream += 2;
}
g += p->linesize[0] / 4;
}
} else {
const uint8_t *ptr = p->data[0];
linesize = p->linesize[0];
for (i = 0; i < h; i++) {
memcpy(bytestream, ptr, n);
bytestream += n;
ptr += linesize;
}
}
if (avctx->pix_fmt == AV_PIX_FMT_YUV420P || avctx->pix_fmt == AV_PIX_FMT_YUV420P16BE) {
const uint8_t *ptr1 = p->data[1], *ptr2 = p->data[2];
h >>= 1;
n >>= 1;
for (i = 0; i < h; i++) {
memcpy(bytestream, ptr1, n);
bytestream += n;
memcpy(bytestream, ptr2, n);
bytestream += n;
ptr1 += p->linesize[1];
ptr2 += p->linesize[2];
}
}
av_shrink_packet(pkt, bytestream - bytestream_start);
*got_packet = 1;
return 0;
}
#if CONFIG_PGM_ENCODER
const FFCodec ff_pgm_encoder = {
.p.name = "pgm",
CODEC_LONG_NAME("PGM (Portable GrayMap) image"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_PGM,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
FF_CODEC_ENCODE_CB(pnm_encode_frame),
.p.pix_fmts = (const enum AVPixelFormat[]){
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_NONE
},
};
#endif
#if CONFIG_PGMYUV_ENCODER
const FFCodec ff_pgmyuv_encoder = {
.p.name = "pgmyuv",
CODEC_LONG_NAME("PGMYUV (Portable GrayMap YUV) image"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_PGMYUV,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
FF_CODEC_ENCODE_CB(pnm_encode_frame),
.p.pix_fmts = (const enum AVPixelFormat[]){
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_NONE
},
};
#endif
#if CONFIG_PPM_ENCODER
const FFCodec ff_ppm_encoder = {
.p.name = "ppm",
CODEC_LONG_NAME("PPM (Portable PixelMap) image"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_PPM,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
FF_CODEC_ENCODE_CB(pnm_encode_frame),
.p.pix_fmts = (const enum AVPixelFormat[]){
AV_PIX_FMT_RGB24, AV_PIX_FMT_RGB48BE, AV_PIX_FMT_NONE
},
};
#endif
#if CONFIG_PBM_ENCODER
const FFCodec ff_pbm_encoder = {
.p.name = "pbm",
CODEC_LONG_NAME("PBM (Portable BitMap) image"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_PBM,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
FF_CODEC_ENCODE_CB(pnm_encode_frame),
.p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_MONOWHITE,
AV_PIX_FMT_NONE },
};
#endif
#if CONFIG_PFM_ENCODER
const FFCodec ff_pfm_encoder = {
.p.name = "pfm",
CODEC_LONG_NAME("PFM (Portable FloatMap) image"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_PFM,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
FF_CODEC_ENCODE_CB(pnm_encode_frame),
.p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_GBRPF32LE,
AV_PIX_FMT_GRAYF32LE,
AV_PIX_FMT_GBRPF32BE,
AV_PIX_FMT_GRAYF32BE,
AV_PIX_FMT_NONE },
};
#endif
#if CONFIG_PHM_ENCODER
static av_cold int phm_enc_init(AVCodecContext *avctx)
{
PHMEncContext *s = avctx->priv_data;
ff_init_float2half_tables(&s->f2h_tables);
return 0;
}
const FFCodec ff_phm_encoder = {
.p.name = "phm",
CODEC_LONG_NAME("PHM (Portable HalfFloatMap) image"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_PHM,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
.priv_data_size = sizeof(PHMEncContext),
.init = phm_enc_init,
FF_CODEC_ENCODE_CB(pnm_encode_frame),
.p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_GBRPF32,
AV_PIX_FMT_GRAYF32,
AV_PIX_FMT_NONE },
};
#endif