generic-library/ffmpeg
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Split the decoders from pnmen.c off into their own file.

Browse Source 
Originally committed as revision 20394 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Diego Biurrun
2009-10-28 06:34:00 +00:00
parent 761f2c9048
commit 318888f808
3 changed files with 239 additions and 213 deletions
Download Patch File Download Diff File Expand all files Collapse all files

208
libavcodec/pnmenc.c
View File

@@ -24,134 +24,6 @@
#include "pnm.h"
static int pnm_decode_frame(AVCodecContext *avctx, void *data,
int *data_size, AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->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_RGB48BE:
n = avctx->width * 6;
goto do_read;
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)
{
@@ -323,22 +195,6 @@ static int pam_encode_frame(AVCodecContext *avctx, unsigned char *outbuf,
}
#if CONFIG_PGM_DECODER
AVCodec pgm_decoder = {
"pgm",
CODEC_TYPE_VIDEO,
CODEC_ID_PGM,
sizeof(PNMContext),
ff_pnm_init,
NULL,
ff_pnm_end,
pnm_decode_frame,
CODEC_CAP_DR1,
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_GRAY8, PIX_FMT_GRAY16BE, PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
};
#endif
#if CONFIG_PGM_ENCODER
AVCodec pgm_encoder = {
"pgm",
@@ -352,22 +208,6 @@ AVCodec pgm_encoder = {
};
#endif
#if CONFIG_PGMYUV_DECODER
AVCodec pgmyuv_decoder = {
"pgmyuv",
CODEC_TYPE_VIDEO,
CODEC_ID_PGMYUV,
sizeof(PNMContext),
ff_pnm_init,
NULL,
ff_pnm_end,
pnm_decode_frame,
CODEC_CAP_DR1,
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
};
#endif
#if CONFIG_PGMYUV_ENCODER
AVCodec pgmyuv_encoder = {
"pgmyuv",
@@ -381,22 +221,6 @@ AVCodec pgmyuv_encoder = {
};
#endif
#if CONFIG_PPM_DECODER
AVCodec ppm_decoder = {
"ppm",
CODEC_TYPE_VIDEO,
CODEC_ID_PPM,
sizeof(PNMContext),
ff_pnm_init,
NULL,
ff_pnm_end,
pnm_decode_frame,
CODEC_CAP_DR1,
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB48BE, PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
};
#endif
#if CONFIG_PPM_ENCODER
AVCodec ppm_encoder = {
"ppm",
@@ -410,22 +234,6 @@ AVCodec ppm_encoder = {
};
#endif
#if CONFIG_PBM_DECODER
AVCodec pbm_decoder = {
"pbm",
CODEC_TYPE_VIDEO,
CODEC_ID_PBM,
sizeof(PNMContext),
ff_pnm_init,
NULL,
ff_pnm_end,
pnm_decode_frame,
CODEC_CAP_DR1,
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_MONOWHITE, PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
};
#endif
#if CONFIG_PBM_ENCODER
AVCodec pbm_encoder = {
"pbm",
@@ -439,22 +247,6 @@ AVCodec pbm_encoder = {
};
#endif
#if CONFIG_PAM_DECODER
AVCodec pam_decoder = {
"pam",
CODEC_TYPE_VIDEO,
CODEC_ID_PAM,
sizeof(PNMContext),
ff_pnm_init,
NULL,
ff_pnm_end,
pnm_decode_frame,
CODEC_CAP_DR1,
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
};
#endif
#if CONFIG_PAM_ENCODER
AVCodec pam_encoder = {
"pam",