falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
Browse Source

rename pnm.c to pnmenc.c and pnm_common.c to pnm.c 

Originally committed as revision 8996 to svn://svn.ffmpeg.org/ffmpeg/trunk
tags/v0.5
Aurelien Jacobs 18 years ago
parent
a2e4c0ddae
commit
9ac2e7971b
4 changed files with 536 additions and 536 deletions
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. +6
    -6
      libavcodec/Makefile
  2. +104
    -383
      libavcodec/pnm.c
  3. +0
    -147
      libavcodec/pnm_common.c
  4. +426
    -0
      libavcodec/pnmenc.c

+ 6
- 6
libavcodec/Makefile View File

@@ -118,13 +118,13 @@ OBJS-$(CONFIG_MSRLE_DECODER) += msrle.o
OBJS-$(CONFIG_MSVIDEO1_DECODER) += msvideo1.o
OBJS-$(CONFIG_MSZH_DECODER) += lcl.o
OBJS-$(CONFIG_NUV_DECODER) += nuv.o rtjpeg.o
OBJS-$(CONFIG_PAM_ENCODER) += pnm.o pnm_common.o
OBJS-$(CONFIG_PBM_ENCODER) += pnm.o pnm_common.o
OBJS-$(CONFIG_PGM_ENCODER) += pnm.o pnm_common.o
OBJS-$(CONFIG_PGMYUV_ENCODER) += pnm.o pnm_common.o
OBJS-$(CONFIG_PAM_ENCODER) += pnmenc.o pnm.o
OBJS-$(CONFIG_PBM_ENCODER) += pnmenc.o pnm.o
OBJS-$(CONFIG_PGM_ENCODER) += pnmenc.o pnm.o
OBJS-$(CONFIG_PGMYUV_ENCODER) += pnmenc.o pnm.o
OBJS-$(CONFIG_PNG_DECODER) += png.o
OBJS-$(CONFIG_PNG_ENCODER) += png.o
OBJS-$(CONFIG_PPM_ENCODER) += pnm.o pnm_common.o
OBJS-$(CONFIG_PPM_ENCODER) += pnmenc.o pnm.o
OBJS-$(CONFIG_PTX_DECODER) += ptx.o
OBJS-$(CONFIG_QDM2_DECODER) += qdm2.o
OBJS-$(CONFIG_QDRAW_DECODER) += qdrw.o
@@ -299,7 +299,7 @@ OBJS-$(CONFIG_MJPEG_PARSER) += mjpeg_parser.o
OBJS-$(CONFIG_MPEG4VIDEO_PARSER) += mpeg4video_parser.o
OBJS-$(CONFIG_MPEGAUDIO_PARSER) += mpegaudio_parser.o
OBJS-$(CONFIG_MPEGVIDEO_PARSER) += mpegvideo_parser.o
OBJS-$(CONFIG_PNM_PARSER) += pnm_parser.o pnm_common.o
OBJS-$(CONFIG_PNM_PARSER) += pnm_parser.o pnm.o
OBJS-$(CONFIG_VC1_PARSER) += vc1_parser.o

OBJS-$(HAVE_PTHREADS) += pthread.o


+ 104
- 383
libavcodec/pnm.c View File

@@ -21,406 +21,127 @@
#include "avcodec.h"
#include "pnm.h"


static int common_init(AVCodecContext *avctx){
PNMContext *s = avctx->priv_data;

avcodec_get_frame_defaults((AVFrame*)&s->picture);
avctx->coded_frame= (AVFrame*)&s->picture;

return 0;
static inline int pnm_space(int c)
{
return (c == ' ' || c == '\n' || c == '\r' || c == '\t');
}

static int pnm_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
static void pnm_get(PNMContext *sc, char *str, int buf_size)
{
PNMContext * const s = avctx->priv_data;
AVFrame *picture = data;
AVFrame * const p= (AVFrame*)&s->picture;
int i, n, linesize, h, upgrade = 0;
unsigned char *ptr;

s->bytestream_start=
s->bytestream= buf;
s->bytestream_end= buf + buf_size;

if(ff_pnm_decode_header(avctx, s) < 0)
return -1;

if(p->data[0])
avctx->release_buffer(avctx, p);

p->reference= 0;
if(avctx->get_buffer(avctx, p) < 0){
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
char *s;
int c;

/* skip spaces and comments */
for(;;) {
c = *sc->bytestream++;
if (c == '#') {
do {
c = *sc->bytestream++;
} while (c != '\n' && sc->bytestream < sc->bytestream_end);
} else if (!pnm_space(c)) {
break;
}
}
p->pict_type= FF_I_TYPE;
p->key_frame= 1;

switch(avctx->pix_fmt) {
default:
return -1;
case PIX_FMT_RGB24:
n = avctx->width * 3;
goto do_read;
case PIX_FMT_GRAY8:
n = avctx->width;
if (s->maxval < 255)
upgrade = 1;
goto do_read;
case PIX_FMT_GRAY16BE:
case PIX_FMT_GRAY16LE:
n = avctx->width * 2;
if (s->maxval < 65535)
upgrade = 2;
goto do_read;
case PIX_FMT_MONOWHITE:
case PIX_FMT_MONOBLACK:
n = (avctx->width + 7) >> 3;
do_read:
ptr = p->data[0];
linesize = p->linesize[0];
if(s->bytestream + n*avctx->height > s->bytestream_end)
return -1;
for(i = 0; i < avctx->height; i++) {
if (!upgrade)
memcpy(ptr, s->bytestream, n);
else if (upgrade == 1) {
unsigned int j, f = (255*128 + s->maxval/2) / s->maxval;
for (j=0; j<n; j++)
ptr[j] = (s->bytestream[j] * f + 64) >> 7;
} else if (upgrade == 2) {
unsigned int j, v, f = (65535*32768 + s->maxval/2) / s->maxval;
for (j=0; j<n/2; j++) {
v = be2me_16(((uint16_t *)s->bytestream)[j]);
((uint16_t *)ptr)[j] = (v * f + 16384) >> 15;
}
}
s->bytestream += n;
ptr += linesize;
}
break;
case PIX_FMT_YUV420P:
{
unsigned char *ptr1, *ptr2;
s = str;
while (sc->bytestream < sc->bytestream_end && !pnm_space(c)) {
if ((s - str) < buf_size - 1)
*s++ = c;
c = *sc->bytestream++;
}
*s = '\0';
}

n = avctx->width;
ptr = p->data[0];
linesize = p->linesize[0];
if(s->bytestream + n*avctx->height*3/2 > s->bytestream_end)
int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s){
char buf1[32], tuple_type[32];
int h, w, depth, maxval;

pnm_get(s, buf1, sizeof(buf1));
if (!strcmp(buf1, "P4")) {
avctx->pix_fmt = PIX_FMT_MONOWHITE;
} else if (!strcmp(buf1, "P5")) {
if (avctx->codec_id == CODEC_ID_PGMYUV)
avctx->pix_fmt = PIX_FMT_YUV420P;
else
avctx->pix_fmt = PIX_FMT_GRAY8;
} else if (!strcmp(buf1, "P6")) {
avctx->pix_fmt = PIX_FMT_RGB24;
} else if (!strcmp(buf1, "P7")) {
w = -1;
h = -1;
maxval = -1;
depth = -1;
tuple_type[0] = '\0';
for(;;) {
pnm_get(s, buf1, sizeof(buf1));
if (!strcmp(buf1, "WIDTH")) {
pnm_get(s, buf1, sizeof(buf1));
w = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "HEIGHT")) {
pnm_get(s, buf1, sizeof(buf1));
h = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "DEPTH")) {
pnm_get(s, buf1, sizeof(buf1));
depth = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "MAXVAL")) {
pnm_get(s, buf1, sizeof(buf1));
maxval = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "TUPLETYPE")) {
pnm_get(s, tuple_type, sizeof(tuple_type));
} else if (!strcmp(buf1, "ENDHDR")) {
break;
} else {
return -1;
for(i = 0; i < avctx->height; i++) {
memcpy(ptr, s->bytestream, n);
s->bytestream += n;
ptr += linesize;
}
ptr1 = p->data[1];
ptr2 = p->data[2];
n >>= 1;
h = avctx->height >> 1;
for(i = 0; i < h; i++) {
memcpy(ptr1, s->bytestream, n);
s->bytestream += n;
memcpy(ptr2, s->bytestream, n);
s->bytestream += n;
ptr1 += p->linesize[1];
ptr2 += p->linesize[2];
}
}
break;
case PIX_FMT_RGB32:
ptr = p->data[0];
linesize = p->linesize[0];
if(s->bytestream + avctx->width*avctx->height*4 > s->bytestream_end)
/* check that all tags are present */
if (w <= 0 || h <= 0 || maxval <= 0 || depth <= 0 || tuple_type[0] == '\0' || avcodec_check_dimensions(avctx, w, h))
return -1;
for(i = 0; i < avctx->height; i++) {
int j, r, g, b, a;

for(j = 0;j < avctx->width; j++) {
r = *s->bytestream++;
g = *s->bytestream++;
b = *s->bytestream++;
a = *s->bytestream++;
((uint32_t *)ptr)[j] = (a << 24) | (r << 16) | (g << 8) | b;
}
ptr += linesize;
avctx->width = w;
avctx->height = h;
if (depth == 1) {
if (maxval == 1)
avctx->pix_fmt = PIX_FMT_MONOWHITE;
else
avctx->pix_fmt = PIX_FMT_GRAY8;
} else if (depth == 3) {
avctx->pix_fmt = PIX_FMT_RGB24;
} else if (depth == 4) {
avctx->pix_fmt = PIX_FMT_RGB32;
} else {
return -1;
}
break;
}
*picture= *(AVFrame*)&s->picture;
*data_size = sizeof(AVPicture);

return s->bytestream - s->bytestream_start;
}

static int pnm_encode_frame(AVCodecContext *avctx, unsigned char *outbuf, int buf_size, void *data){
PNMContext *s = avctx->priv_data;
AVFrame *pict = data;
AVFrame * const p= (AVFrame*)&s->picture;
int i, h, h1, c, n, linesize;
uint8_t *ptr, *ptr1, *ptr2;

if(buf_size < avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height) + 200){
av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
return 0;
} else {
return -1;
}

*p = *pict;
p->pict_type= FF_I_TYPE;
p->key_frame= 1;

s->bytestream_start=
s->bytestream= outbuf;
s->bytestream_end= outbuf+buf_size;

h = avctx->height;
h1 = h;
switch(avctx->pix_fmt) {
case PIX_FMT_MONOWHITE:
c = '4';
n = (avctx->width + 7) >> 3;
break;
case PIX_FMT_GRAY8:
c = '5';
n = avctx->width;
break;
case PIX_FMT_GRAY16BE:
c = '5';
n = avctx->width * 2;
break;
case PIX_FMT_RGB24:
c = '6';
n = avctx->width * 3;
break;
case PIX_FMT_YUV420P:
c = '5';
n = avctx->width;
h1 = (h * 3) / 2;
break;
default:
pnm_get(s, buf1, sizeof(buf1));
avctx->width = atoi(buf1);
if (avctx->width <= 0)
return -1;
pnm_get(s, buf1, sizeof(buf1));
avctx->height = atoi(buf1);
if(avcodec_check_dimensions(avctx, avctx->width, avctx->height))
return -1;
}
snprintf(s->bytestream, s->bytestream_end - s->bytestream,
"P%c\n%d %d\n",
c, avctx->width, h1);
s->bytestream += strlen(s->bytestream);
if (avctx->pix_fmt != PIX_FMT_MONOWHITE) {
snprintf(s->bytestream, s->bytestream_end - s->bytestream,
"%d\n", (avctx->pix_fmt != PIX_FMT_GRAY16BE) ? 255 : 65535);
s->bytestream += strlen(s->bytestream);
}

ptr = p->data[0];
linesize = p->linesize[0];
for(i=0;i<h;i++) {
memcpy(s->bytestream, ptr, n);
s->bytestream += n;
ptr += linesize;
}

if (avctx->pix_fmt == PIX_FMT_YUV420P) {
h >>= 1;
n >>= 1;
ptr1 = p->data[1];
ptr2 = p->data[2];
for(i=0;i<h;i++) {
memcpy(s->bytestream, ptr1, n);
s->bytestream += n;
memcpy(s->bytestream, ptr2, n);
s->bytestream += n;
ptr1 += p->linesize[1];
ptr2 += p->linesize[2];
pnm_get(s, buf1, sizeof(buf1));
s->maxval = atoi(buf1);
if(s->maxval >= 256 && avctx->pix_fmt == PIX_FMT_GRAY8) {
avctx->pix_fmt = PIX_FMT_GRAY16BE;
if (s->maxval != 65535)
avctx->pix_fmt = PIX_FMT_GRAY16;
}
}
return s->bytestream - s->bytestream_start;
}

static int pam_encode_frame(AVCodecContext *avctx, unsigned char *outbuf, int buf_size, void *data){
PNMContext *s = avctx->priv_data;
AVFrame *pict = data;
AVFrame * const p= (AVFrame*)&s->picture;
int i, h, w, n, linesize, depth, maxval;
const char *tuple_type;
uint8_t *ptr;

if(buf_size < avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height) + 200){
av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
return -1;
}

*p = *pict;
p->pict_type= FF_I_TYPE;
p->key_frame= 1;

s->bytestream_start=
s->bytestream= outbuf;
s->bytestream_end= outbuf+buf_size;

h = avctx->height;
w = avctx->width;
switch(avctx->pix_fmt) {
case PIX_FMT_MONOWHITE:
n = (w + 7) >> 3;
depth = 1;
maxval = 1;
tuple_type = "BLACKANDWHITE";
break;
case PIX_FMT_GRAY8:
n = w;
depth = 1;
maxval = 255;
tuple_type = "GRAYSCALE";
break;
case PIX_FMT_RGB24:
n = w * 3;
depth = 3;
maxval = 255;
tuple_type = "RGB";
break;
case PIX_FMT_RGB32:
n = w * 4;
depth = 4;
maxval = 255;
tuple_type = "RGB_ALPHA";
break;
default:
return -1;
}
snprintf(s->bytestream, s->bytestream_end - s->bytestream,
"P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLETYPE %s\nENDHDR\n",
w, h, depth, maxval, tuple_type);
s->bytestream += strlen(s->bytestream);

ptr = p->data[0];
linesize = p->linesize[0];

if (avctx->pix_fmt == PIX_FMT_RGB32) {
int j;
unsigned int v;

for(i=0;i<h;i++) {
for(j=0;j<w;j++) {
v = ((uint32_t *)ptr)[j];
*s->bytestream++ = v >> 16;
*s->bytestream++ = v >> 8;
*s->bytestream++ = v;
*s->bytestream++ = v >> 24;
}
ptr += linesize;
}
} else {
for(i=0;i<h;i++) {
memcpy(s->bytestream, ptr, n);
s->bytestream += n;
ptr += linesize;
}
/* more check if YUV420 */
if (avctx->pix_fmt == PIX_FMT_YUV420P) {
if ((avctx->width & 1) != 0)
return -1;
h = (avctx->height * 2);
if ((h % 3) != 0)
return -1;
h /= 3;
avctx->height = h;
}
return s->bytestream - s->bytestream_start;
}

#if 0
static int pnm_probe(AVProbeData *pd)
{
const char *p = pd->buf;
if (pd->buf_size >= 8 &&
p[0] == 'P' &&
p[1] >= '4' && p[1] <= '6' &&
pnm_space(p[2]) )
return AVPROBE_SCORE_MAX - 1; /* to permit pgmyuv probe */
else
return 0;
}

static int pgmyuv_probe(AVProbeData *pd)
{
if (match_ext(pd->filename, "pgmyuv"))
return AVPROBE_SCORE_MAX;
else
return 0;
}

static int pam_probe(AVProbeData *pd)
{
const char *p = pd->buf;
if (pd->buf_size >= 8 &&
p[0] == 'P' &&
p[1] == '7' &&
p[2] == '\n')
return AVPROBE_SCORE_MAX;
else
return 0;
return 0;
}
#endif


#ifdef CONFIG_PGM_ENCODER
AVCodec pgm_encoder = {
"pgm",
CODEC_TYPE_VIDEO,
CODEC_ID_PGM,
sizeof(PNMContext),
common_init,
pnm_encode_frame,
NULL, //encode_end,
pnm_decode_frame,
.pix_fmts= (enum PixelFormat[]){PIX_FMT_GRAY8, PIX_FMT_GRAY16BE, -1},
};
#endif // CONFIG_PGM_ENCODER

#ifdef CONFIG_PGMYUV_ENCODER
AVCodec pgmyuv_encoder = {
"pgmyuv",
CODEC_TYPE_VIDEO,
CODEC_ID_PGMYUV,
sizeof(PNMContext),
common_init,
pnm_encode_frame,
NULL, //encode_end,
pnm_decode_frame,
.pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},
};
#endif // CONFIG_PGMYUV_ENCODER

#ifdef CONFIG_PPM_ENCODER
AVCodec ppm_encoder = {
"ppm",
CODEC_TYPE_VIDEO,
CODEC_ID_PPM,
sizeof(PNMContext),
common_init,
pnm_encode_frame,
NULL, //encode_end,
pnm_decode_frame,
.pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, -1},
};
#endif // CONFIG_PPM_ENCODER

#ifdef CONFIG_PBM_ENCODER
AVCodec pbm_encoder = {
"pbm",
CODEC_TYPE_VIDEO,
CODEC_ID_PBM,
sizeof(PNMContext),
common_init,
pnm_encode_frame,
NULL, //encode_end,
pnm_decode_frame,
.pix_fmts= (enum PixelFormat[]){PIX_FMT_MONOWHITE, -1},
};
#endif // CONFIG_PBM_ENCODER

#ifdef CONFIG_PAM_ENCODER
AVCodec pam_encoder = {
"pam",
CODEC_TYPE_VIDEO,
CODEC_ID_PAM,
sizeof(PNMContext),
common_init,
pam_encode_frame,
NULL, //encode_end,
pnm_decode_frame,
.pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, -1},
};
#endif // CONFIG_PAM_ENCODER

+ 0
- 147
libavcodec/pnm_common.c View File

@@ -1,147 +0,0 @@
/*
* 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 "avcodec.h"
#include "pnm.h"

static inline int pnm_space(int c)
{
return (c == ' ' || c == '\n' || c == '\r' || c == '\t');
}

static void pnm_get(PNMContext *sc, char *str, int buf_size)
{
char *s;
int c;

/* skip spaces and comments */
for(;;) {
c = *sc->bytestream++;
if (c == '#') {
do {
c = *sc->bytestream++;
} while (c != '\n' && sc->bytestream < sc->bytestream_end);
} else if (!pnm_space(c)) {
break;
}
}

s = str;
while (sc->bytestream < sc->bytestream_end && !pnm_space(c)) {
if ((s - str) < buf_size - 1)
*s++ = c;
c = *sc->bytestream++;
}
*s = '\0';
}

int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s){
char buf1[32], tuple_type[32];
int h, w, depth, maxval;

pnm_get(s, buf1, sizeof(buf1));
if (!strcmp(buf1, "P4")) {
avctx->pix_fmt = PIX_FMT_MONOWHITE;
} else if (!strcmp(buf1, "P5")) {
if (avctx->codec_id == CODEC_ID_PGMYUV)
avctx->pix_fmt = PIX_FMT_YUV420P;
else
avctx->pix_fmt = PIX_FMT_GRAY8;
} else if (!strcmp(buf1, "P6")) {
avctx->pix_fmt = PIX_FMT_RGB24;
} else if (!strcmp(buf1, "P7")) {
w = -1;
h = -1;
maxval = -1;
depth = -1;
tuple_type[0] = '\0';
for(;;) {
pnm_get(s, buf1, sizeof(buf1));
if (!strcmp(buf1, "WIDTH")) {
pnm_get(s, buf1, sizeof(buf1));
w = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "HEIGHT")) {
pnm_get(s, buf1, sizeof(buf1));
h = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "DEPTH")) {
pnm_get(s, buf1, sizeof(buf1));
depth = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "MAXVAL")) {
pnm_get(s, buf1, sizeof(buf1));
maxval = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "TUPLETYPE")) {
pnm_get(s, tuple_type, sizeof(tuple_type));
} else if (!strcmp(buf1, "ENDHDR")) {
break;
} else {
return -1;
}
}
/* check that all tags are present */
if (w <= 0 || h <= 0 || maxval <= 0 || depth <= 0 || tuple_type[0] == '\0' || avcodec_check_dimensions(avctx, w, h))
return -1;

avctx->width = w;
avctx->height = h;
if (depth == 1) {
if (maxval == 1)
avctx->pix_fmt = PIX_FMT_MONOWHITE;
else
avctx->pix_fmt = PIX_FMT_GRAY8;
} else if (depth == 3) {
avctx->pix_fmt = PIX_FMT_RGB24;
} else if (depth == 4) {
avctx->pix_fmt = PIX_FMT_RGB32;
} else {
return -1;
}
return 0;
} else {
return -1;
}
pnm_get(s, buf1, sizeof(buf1));
avctx->width = atoi(buf1);
if (avctx->width <= 0)
return -1;
pnm_get(s, buf1, sizeof(buf1));
avctx->height = atoi(buf1);
if(avcodec_check_dimensions(avctx, avctx->width, avctx->height))
return -1;
if (avctx->pix_fmt != PIX_FMT_MONOWHITE) {
pnm_get(s, buf1, sizeof(buf1));
s->maxval = atoi(buf1);
if(s->maxval >= 256 && avctx->pix_fmt == PIX_FMT_GRAY8) {
avctx->pix_fmt = PIX_FMT_GRAY16BE;
if (s->maxval != 65535)
avctx->pix_fmt = PIX_FMT_GRAY16;
}
}
/* more check if YUV420 */
if (avctx->pix_fmt == PIX_FMT_YUV420P) {
if ((avctx->width & 1) != 0)
return -1;
h = (avctx->height * 2);
if ((h % 3) != 0)
return -1;
h /= 3;
avctx->height = h;
}
return 0;
}

+ 426
- 0
libavcodec/pnmenc.c View File

@@ -0,0 +1,426 @@
/*
* 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 "avcodec.h"
#include "pnm.h"


static int common_init(AVCodecContext *avctx){
PNMContext *s = avctx->priv_data;

avcodec_get_frame_defaults((AVFrame*)&s->picture);
avctx->coded_frame= (AVFrame*)&s->picture;

return 0;
}

static int pnm_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
PNMContext * const s = avctx->priv_data;
AVFrame *picture = data;
AVFrame * const p= (AVFrame*)&s->picture;
int i, n, linesize, h, upgrade = 0;
unsigned char *ptr;

s->bytestream_start=
s->bytestream= buf;
s->bytestream_end= buf + buf_size;

if(ff_pnm_decode_header(avctx, s) < 0)
return -1;

if(p->data[0])
avctx->release_buffer(avctx, p);

p->reference= 0;
if(avctx->get_buffer(avctx, p) < 0){
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
p->pict_type= FF_I_TYPE;
p->key_frame= 1;

switch(avctx->pix_fmt) {
default:
return -1;
case PIX_FMT_RGB24:
n = avctx->width * 3;
goto do_read;
case PIX_FMT_GRAY8:
n = avctx->width;
if (s->maxval < 255)
upgrade = 1;
goto do_read;
case PIX_FMT_GRAY16BE:
case PIX_FMT_GRAY16LE:
n = avctx->width * 2;
if (s->maxval < 65535)
upgrade = 2;
goto do_read;
case PIX_FMT_MONOWHITE:
case PIX_FMT_MONOBLACK:
n = (avctx->width + 7) >> 3;
do_read:
ptr = p->data[0];
linesize = p->linesize[0];
if(s->bytestream + n*avctx->height > s->bytestream_end)
return -1;
for(i = 0; i < avctx->height; i++) {
if (!upgrade)
memcpy(ptr, s->bytestream, n);
else if (upgrade == 1) {
unsigned int j, f = (255*128 + s->maxval/2) / s->maxval;
for (j=0; j<n; j++)
ptr[j] = (s->bytestream[j] * f + 64) >> 7;
} else if (upgrade == 2) {
unsigned int j, v, f = (65535*32768 + s->maxval/2) / s->maxval;
for (j=0; j<n/2; j++) {
v = be2me_16(((uint16_t *)s->bytestream)[j]);
((uint16_t *)ptr)[j] = (v * f + 16384) >> 15;
}
}
s->bytestream += n;
ptr += linesize;
}
break;
case PIX_FMT_YUV420P:
{
unsigned char *ptr1, *ptr2;

n = avctx->width;
ptr = p->data[0];
linesize = p->linesize[0];
if(s->bytestream + n*avctx->height*3/2 > s->bytestream_end)
return -1;
for(i = 0; i < avctx->height; i++) {
memcpy(ptr, s->bytestream, n);
s->bytestream += n;
ptr += linesize;
}
ptr1 = p->data[1];
ptr2 = p->data[2];
n >>= 1;
h = avctx->height >> 1;
for(i = 0; i < h; i++) {
memcpy(ptr1, s->bytestream, n);
s->bytestream += n;
memcpy(ptr2, s->bytestream, n);
s->bytestream += n;
ptr1 += p->linesize[1];
ptr2 += p->linesize[2];
}
}
break;
case PIX_FMT_RGB32:
ptr = p->data[0];
linesize = p->linesize[0];
if(s->bytestream + avctx->width*avctx->height*4 > s->bytestream_end)
return -1;
for(i = 0; i < avctx->height; i++) {
int j, r, g, b, a;

for(j = 0;j < avctx->width; j++) {
r = *s->bytestream++;
g = *s->bytestream++;
b = *s->bytestream++;
a = *s->bytestream++;
((uint32_t *)ptr)[j] = (a << 24) | (r << 16) | (g << 8) | b;
}
ptr += linesize;
}
break;
}
*picture= *(AVFrame*)&s->picture;
*data_size = sizeof(AVPicture);

return s->bytestream - s->bytestream_start;
}

static int pnm_encode_frame(AVCodecContext *avctx, unsigned char *outbuf, int buf_size, void *data){
PNMContext *s = avctx->priv_data;
AVFrame *pict = data;
AVFrame * const p= (AVFrame*)&s->picture;
int i, h, h1, c, n, linesize;
uint8_t *ptr, *ptr1, *ptr2;

if(buf_size < avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height) + 200){
av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
return -1;
}

*p = *pict;
p->pict_type= FF_I_TYPE;
p->key_frame= 1;

s->bytestream_start=
s->bytestream= outbuf;
s->bytestream_end= outbuf+buf_size;

h = avctx->height;
h1 = h;
switch(avctx->pix_fmt) {
case PIX_FMT_MONOWHITE:
c = '4';
n = (avctx->width + 7) >> 3;
break;
case PIX_FMT_GRAY8:
c = '5';
n = avctx->width;
break;
case PIX_FMT_GRAY16BE:
c = '5';
n = avctx->width * 2;
break;
case PIX_FMT_RGB24:
c = '6';
n = avctx->width * 3;
break;
case PIX_FMT_YUV420P:
c = '5';
n = avctx->width;
h1 = (h * 3) / 2;
break;
default:
return -1;
}
snprintf(s->bytestream, s->bytestream_end - s->bytestream,
"P%c\n%d %d\n",
c, avctx->width, h1);
s->bytestream += strlen(s->bytestream);
if (avctx->pix_fmt != PIX_FMT_MONOWHITE) {
snprintf(s->bytestream, s->bytestream_end - s->bytestream,
"%d\n", (avctx->pix_fmt != PIX_FMT_GRAY16BE) ? 255 : 65535);
s->bytestream += strlen(s->bytestream);
}

ptr = p->data[0];
linesize = p->linesize[0];
for(i=0;i<h;i++) {
memcpy(s->bytestream, ptr, n);
s->bytestream += n;
ptr += linesize;
}

if (avctx->pix_fmt == PIX_FMT_YUV420P) {
h >>= 1;
n >>= 1;
ptr1 = p->data[1];
ptr2 = p->data[2];
for(i=0;i<h;i++) {
memcpy(s->bytestream, ptr1, n);
s->bytestream += n;
memcpy(s->bytestream, ptr2, n);
s->bytestream += n;
ptr1 += p->linesize[1];
ptr2 += p->linesize[2];
}
}
return s->bytestream - s->bytestream_start;
}

static int pam_encode_frame(AVCodecContext *avctx, unsigned char *outbuf, int buf_size, void *data){
PNMContext *s = avctx->priv_data;
AVFrame *pict = data;
AVFrame * const p= (AVFrame*)&s->picture;
int i, h, w, n, linesize, depth, maxval;
const char *tuple_type;
uint8_t *ptr;

if(buf_size < avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height) + 200){
av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
return -1;
}

*p = *pict;
p->pict_type= FF_I_TYPE;
p->key_frame= 1;

s->bytestream_start=
s->bytestream= outbuf;
s->bytestream_end= outbuf+buf_size;

h = avctx->height;
w = avctx->width;
switch(avctx->pix_fmt) {
case PIX_FMT_MONOWHITE:
n = (w + 7) >> 3;
depth = 1;
maxval = 1;
tuple_type = "BLACKANDWHITE";
break;
case PIX_FMT_GRAY8:
n = w;
depth = 1;
maxval = 255;
tuple_type = "GRAYSCALE";
break;
case PIX_FMT_RGB24:
n = w * 3;
depth = 3;
maxval = 255;
tuple_type = "RGB";
break;
case PIX_FMT_RGB32:
n = w * 4;
depth = 4;
maxval = 255;
tuple_type = "RGB_ALPHA";
break;
default:
return -1;
}
snprintf(s->bytestream, s->bytestream_end - s->bytestream,
"P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLETYPE %s\nENDHDR\n",
w, h, depth, maxval, tuple_type);
s->bytestream += strlen(s->bytestream);

ptr = p->data[0];
linesize = p->linesize[0];

if (avctx->pix_fmt == PIX_FMT_RGB32) {
int j;
unsigned int v;

for(i=0;i<h;i++) {
for(j=0;j<w;j++) {
v = ((uint32_t *)ptr)[j];
*s->bytestream++ = v >> 16;
*s->bytestream++ = v >> 8;
*s->bytestream++ = v;
*s->bytestream++ = v >> 24;
}
ptr += linesize;
}
} else {
for(i=0;i<h;i++) {
memcpy(s->bytestream, ptr, n);
s->bytestream += n;
ptr += linesize;
}
}
return s->bytestream - s->bytestream_start;
}

#if 0
static int pnm_probe(AVProbeData *pd)
{
const char *p = pd->buf;
if (pd->buf_size >= 8 &&
p[0] == 'P' &&
p[1] >= '4' && p[1] <= '6' &&
pnm_space(p[2]) )
return AVPROBE_SCORE_MAX - 1; /* to permit pgmyuv probe */
else
return 0;
}

static int pgmyuv_probe(AVProbeData *pd)
{
if (match_ext(pd->filename, "pgmyuv"))
return AVPROBE_SCORE_MAX;
else
return 0;
}

static int pam_probe(AVProbeData *pd)
{
const char *p = pd->buf;
if (pd->buf_size >= 8 &&
p[0] == 'P' &&
p[1] == '7' &&
p[2] == '\n')
return AVPROBE_SCORE_MAX;
else
return 0;
}
#endif


#ifdef CONFIG_PGM_ENCODER
AVCodec pgm_encoder = {
"pgm",
CODEC_TYPE_VIDEO,
CODEC_ID_PGM,
sizeof(PNMContext),
common_init,
pnm_encode_frame,
NULL, //encode_end,
pnm_decode_frame,
.pix_fmts= (enum PixelFormat[]){PIX_FMT_GRAY8, PIX_FMT_GRAY16BE, -1},
};
#endif // CONFIG_PGM_ENCODER

#ifdef CONFIG_PGMYUV_ENCODER
AVCodec pgmyuv_encoder = {
"pgmyuv",
CODEC_TYPE_VIDEO,
CODEC_ID_PGMYUV,
sizeof(PNMContext),
common_init,
pnm_encode_frame,
NULL, //encode_end,
pnm_decode_frame,
.pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},
};
#endif // CONFIG_PGMYUV_ENCODER

#ifdef CONFIG_PPM_ENCODER
AVCodec ppm_encoder = {
"ppm",
CODEC_TYPE_VIDEO,
CODEC_ID_PPM,
sizeof(PNMContext),
common_init,
pnm_encode_frame,
NULL, //encode_end,
pnm_decode_frame,
.pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, -1},
};
#endif // CONFIG_PPM_ENCODER

#ifdef CONFIG_PBM_ENCODER
AVCodec pbm_encoder = {
"pbm",
CODEC_TYPE_VIDEO,
CODEC_ID_PBM,
sizeof(PNMContext),
common_init,
pnm_encode_frame,
NULL, //encode_end,
pnm_decode_frame,
.pix_fmts= (enum PixelFormat[]){PIX_FMT_MONOWHITE, -1},
};
#endif // CONFIG_PBM_ENCODER

#ifdef CONFIG_PAM_ENCODER
AVCodec pam_encoder = {
"pam",
CODEC_TYPE_VIDEO,
CODEC_ID_PAM,
sizeof(PNMContext),
common_init,
pam_encode_frame,
NULL, //encode_end,
pnm_decode_frame,
.pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, -1},
};
#endif // CONFIG_PAM_ENCODER

Write Preview
Loading…
Cancel
Save