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mpv/libmpcodecs/vf_zrmjpeg.c

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/*
* Copyright (C) 2003 Rik Snel <snel@phys.uu.nl>, license GPL v2
* - based on vd_lavc.c by A'rpi (C) 2002-2003
* - parts from ffmpeg Copyright (c) 2000-2003 Fabrice Bellard
*
* This files includes a straightforward (to be) optimized JPEG encoder for
* the YUV422 format, based on mjpeg code from ffmpeg.
*
* For an excellent introduction to the JPEG format, see:
* http://www.ece.purdue.edu/~bouman/grad-labs/lab8/pdf/lab.pdf
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "../config.h"
#include "../mp_msg.h"
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#ifdef USE_FASTMEMCPY
#include "../libvo/fastmemcpy.h"
#endif
/* We need this #define because we need ../libavcodec/common.h to #define
* be2me_32, otherwise the linker will complain that it doesn't exist */
#define HAVE_AV_CONFIG_H
#include "../libavcodec/avcodec.h"
#include "../libavcodec/dsputil.h"
#include "../libavcodec/mpegvideo.h"
#undef malloc
#undef free
#undef realloc
/* some convenient #define's, is this portable enough? */
#define VERBOSE(...) mp_msg(MSGT_DECVIDEO, MSGL_V, "vf_zrmjpeg: " __VA_ARGS__)
#define ERROR(...) mp_msg(MSGT_DECVIDEO, MSGL_ERR, "vf_zrmjpeg: " __VA_ARGS__)
#define WARNING(...) mp_msg(MSGT_DECVIDEO, MSGL_WARN, \
"vf_zrmjpeg: " __VA_ARGS__)
extern int avcodec_inited;
/* zrmjpeg_encode_mb needs access to these tables for the black & white
* option */
typedef struct MJpegContext {
uint8_t huff_size_dc_luminance[12];
uint16_t huff_code_dc_luminance[12];
uint8_t huff_size_dc_chrominance[12];
uint16_t huff_code_dc_chrominance[12];
uint8_t huff_size_ac_luminance[256];
uint16_t huff_code_ac_luminance[256];
uint8_t huff_size_ac_chrominance[256];
uint16_t huff_code_ac_chrominance[256];
} MJpegContext;
/* Begin excessive code duplication ************************************/
/* Code coming from mpegvideo.c and mjpeg.c in ../libavcodec ***********/
static const unsigned short aanscales[64] = {
/* precomputed values scaled up by 14 bits */
16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520,
22725, 31521, 29692, 26722, 22725, 17855, 12299, 6270,
21407, 29692, 27969, 25172, 21407, 16819, 11585, 5906,
19266, 26722, 25172, 22654, 19266, 15137, 10426, 5315,
16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520,
12873, 17855, 16819, 15137, 12873, 10114, 6967, 3552,
8867, 12299, 11585, 10426, 8867, 6967, 4799, 2446,
4520, 6270, 5906, 5315, 4520, 3552, 2446, 1247
};
static void convert_matrix(MpegEncContext *s, int (*qmat)[64],
uint16_t (*qmat16)[2][64], const uint16_t *quant_matrix,
int bias, int qmin, int qmax) {
int qscale;
for(qscale = qmin; qscale <= qmax; qscale++) {
int i;
if (s->dsp.fdct == ff_jpeg_fdct_islow) {
for (i = 0; i < 64; i++) {
const int j = s->dsp.idct_permutation[i];
/* 16 <= qscale * quant_matrix[i] <= 7905
* 19952 <= aanscales[i] * qscale * quant_matrix[i] <= 249205026
* (1<<36)/19952 >= (1<<36)/(aanscales[i] * qscale * quant_matrix[i])
* >= (1<<36)/249205026
* 3444240 >= (1<<36)/(aanscales[i] * qscale * quant_matrix[i]) >= 275 */
qmat[qscale][i] = (int)((UINT64_C(1) <<
(QMAT_SHIFT-3))/
(qscale*quant_matrix[j]));
}
} else if (s->dsp.fdct == fdct_ifast) {
for (i = 0; i < 64; i++) {
const int j = s->dsp.idct_permutation[i];
/* 16 <= qscale * quant_matrix[i] <= 7905
* 19952 <= aanscales[i] * qscale * quant_matrix[i] <= 249205026
* (1<<36)/19952 >= (1<<36)/(aanscales[i] * qscale * quant_matrix[i])
* >= (1<<36)/249205026
* 3444240 >= (1<<36)/(aanscales[i] * qscale * quant_matrix[i]) >= 275 */
qmat[qscale][i] = (int)((UINT64_C(1) <<
(QMAT_SHIFT + 11))/(aanscales[i]
*qscale * quant_matrix[j]));
}
} else {
for (i = 0; i < 64; i++) {
const int j = s->dsp.idct_permutation[i];
/* We can safely assume that 16 <= quant_matrix[i] <= 255
* So 16 <= qscale * quant_matrix[i] <= 7905
* so (1<<19) / 16 >= (1<<19) / (qscale * quant_matrix[i]) >= (1<<19) / 7905
* so 32768 >= (1<<19) / (qscale * quant_matrix[i]) >= 67 */
qmat[qscale][i] = (int)((uint64_t_C(1) <<
QMAT_SHIFT_MMX) / (qscale
*quant_matrix[j]));
qmat16[qscale][0][i] = (1 << QMAT_SHIFT_MMX)
/(qscale * quant_matrix[j]);
if (qmat16[qscale][0][i] == 0 ||
qmat16[qscale][0][i] == 128*256)
qmat16[qscale][0][i]=128*256-1;
qmat16[qscale][1][i]=ROUNDED_DIV(bias
<<(16-QUANT_BIAS_SHIFT),
qmat16[qscale][0][i]);
}
}
}
}
static inline void encode_dc(MpegEncContext *s, int val,
uint8_t *huff_size, uint16_t *huff_code) {
int mant, nbits;
if (val == 0) {
put_bits(&s->pb, huff_size[0], huff_code[0]);
} else {
mant = val;
if (val < 0) {
val = -val;
mant--;
}
/* compute the log (XXX: optimize) */
nbits = 0;
while (val != 0) {
val = val >> 1;
nbits++;
}
put_bits(&s->pb, huff_size[nbits], huff_code[nbits]);
put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
}
}
static void encode_block(MpegEncContext *s, DCTELEM *block, int n) {
int mant, nbits, code, i, j;
int component, dc, run, last_index, val;
MJpegContext *m = s->mjpeg_ctx;
uint8_t *huff_size_ac;
uint16_t *huff_code_ac;
/* DC coef */
component = (n <= 3 ? 0 : n - 4 + 1);
dc = block[0]; /* overflow is impossible */
val = dc - s->last_dc[component];
if (n < 4) {
encode_dc(s, val, m->huff_size_dc_luminance,
m->huff_code_dc_luminance);
huff_size_ac = m->huff_size_ac_luminance;
huff_code_ac = m->huff_code_ac_luminance;
} else {
encode_dc(s, val, m->huff_size_dc_chrominance,
m->huff_code_dc_chrominance);
huff_size_ac = m->huff_size_ac_chrominance;
huff_code_ac = m->huff_code_ac_chrominance;
}
s->last_dc[component] = dc;
/* AC coefs */
run = 0;
last_index = s->block_last_index[n];
for (i = 1; i <= last_index; i++) {
j = s->intra_scantable.permutated[i];
val = block[j];
if (val == 0) run++;
else {
while (run >= 16) {
put_bits(&s->pb, huff_size_ac[0xf0],
huff_code_ac[0xf0]);
run -= 16;
}
mant = val;
if (val < 0) {
val = -val;
mant--;
}
/* compute the log (XXX: optimize) */
nbits = 0;
while (val != 0) {
val = val >> 1;
nbits++;
}
code = (run << 4) | nbits;
put_bits(&s->pb, huff_size_ac[code],
huff_code_ac[code]);
put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
run = 0;
}
}
/* output EOB only if not already 64 values */
if (last_index < 63 || run != 0)
put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
}
static inline void clip_coeffs(MpegEncContext *s, DCTELEM *block,
int last_index) {
int i;
const int maxlevel= s->max_qcoeff;
const int minlevel= s->min_qcoeff;
for (i = 0; i <= last_index; i++) {
const int j = s->intra_scantable.permutated[i];
int level = block[j];
if (level > maxlevel) level=maxlevel;
else if(level < minlevel) level=minlevel;
block[j]= level;
}
}
/* End excessive code duplication **************************************/
typedef struct {
struct MpegEncContext *s;
int cheap_upsample;
int bw;
int y_ps;
int u_ps;
int v_ps;
int y_rs;
int u_rs;
int v_rs;
} jpeg_enc_t;
/* this function is a reproduction of the one in mjpeg, it includes two
* changes, it allows for black&white encoding (it skips the U and V
* macroblocks and it outputs the huffman code for 'no change' (dc) and
* 'all zero' (ac)) and it takes 4 macroblocks (422) instead of 6 (420) */
static void zr_mjpeg_encode_mb(jpeg_enc_t *j) {
MJpegContext *m = j->s->mjpeg_ctx;
encode_block(j->s, j->s->block[0], 0);
encode_block(j->s, j->s->block[1], 1);
if (j->bw) {
/* U */
put_bits(&j->s->pb, m->huff_size_dc_chrominance[0],
m->huff_code_dc_chrominance[0]);
put_bits(&j->s->pb, m->huff_size_ac_chrominance[0],
m->huff_code_ac_chrominance[0]);
/* V */
put_bits(&j->s->pb, m->huff_size_dc_chrominance[0],
m->huff_code_dc_chrominance[0]);
put_bits(&j->s->pb, m->huff_size_ac_chrominance[0],
m->huff_code_ac_chrominance[0]);
} else {
/* we trick encode_block here so that it uses
* chrominance huffman tables instead of luminance ones
* (see the effect of second argument of encode_block) */
encode_block(j->s, j->s->block[2], 4);
encode_block(j->s, j->s->block[3], 5);
}
}
/* this function can take all kinds of YUV colorspaces
* YV12, YVYU, UYVY. The necesary parameters must be set up by the caller
* y_ps means "y pixel size", y_rs means "y row size".
* For YUYV, for example, is u_buf = y_buf + 1, v_buf = y_buf + 3,
* y_ps = 2, u_ps = 4, v_ps = 4, y_rs = u_rs = v_rs.
*
* The actual buffers must be passed with mjpeg_encode_frame, this is
* to make it possible to call encode on the buffer provided by the
* codec in draw_frame.
*
* The data is straightened out at the moment it is put in DCT
* blocks, there are therefore no spurious memcopies involved */
/* Notice that w must be a multiple of 16 and h must be a multiple of 8 */
/* We produce YUV422 jpegs, the colors must be subsampled horizontally,
* if the colors are also subsampled vertically, then this function
* performs cheap upsampling (better solution will be: a DCT that is
* optimized in the case that every two rows are the same) */
/* cu = 0 means 'No cheap upsampling'
* cu = 1 means 'perform cheap upsampling' */
/* The encoder doesn't know anything about interlacing, the halve height
* needs to be passed and the double rowstride. Which field gets encoded
* is decided by what buffers are passed to mjpeg_encode_frame */
static jpeg_enc_t *jpeg_enc_init(int w, int h, int y_psize, int y_rsize,
int u_psize, int u_rsize, int v_psize, int v_rsize,
int cu, int q, int b) {
jpeg_enc_t *j;
int i = 0;
VERBOSE("JPEG encoder init: %dx%d %d %d %d %d %d %d\n",
w, h, y_psize, y_rsize, u_psize,
u_rsize, v_psize, v_rsize);
j = malloc(sizeof(jpeg_enc_t));
if (j == NULL) return NULL;
j->s = malloc(sizeof(MpegEncContext));
memset(j->s,0x00,sizeof(MpegEncContext));
if (j->s == NULL) {
free(j);
return NULL;
}
/* info on how to access the pixels */
j->y_ps = y_psize;
j->u_ps = u_psize;
j->v_ps = v_psize;
j->y_rs = y_rsize;
j->u_rs = u_rsize;
j->v_rs = v_rsize;
j->s->width = w;
j->s->height = h;
j->s->qscale = q;
j->s->mjpeg_data_only_frames = 0;
j->s->out_format = FMT_MJPEG;
j->s->intra_only = 1;
j->s->encoding = 1;
j->s->pict_type = I_TYPE;
j->s->y_dc_scale = 8;
j->s->c_dc_scale = 8;
j->s->mjpeg_write_tables = 1;
j->s->mjpeg_vsample[0] = 1;
j->s->mjpeg_vsample[1] = 1;
j->s->mjpeg_vsample[2] = 1;
j->s->mjpeg_hsample[0] = 2;
j->s->mjpeg_hsample[1] = 1;
j->s->mjpeg_hsample[2] = 1;
j->cheap_upsample = cu;
j->bw = b;
if (mjpeg_init(j->s) < 0) {
free(j->s);
free(j);
return NULL;
}
/* alloc bogus avctx to keep MPV_common_init from segfaulting */
j->s->avctx = calloc(sizeof(*j->s->avctx), 1);
/* make MPV_common_init allocate important buffers, like s->block */
j->s->avctx->thread_count = 1;
if (MPV_common_init(j->s) < 0) {
free(j->s);
free(j);
return NULL;
}
/* correct the value for sc->mb_height */
j->s->mb_height = j->s->height/8;
j->s->mb_intra = 1;
j->s->intra_matrix[0] = ff_mpeg1_default_intra_matrix[0];
for (i = 1; i < 64; i++)
j->s->intra_matrix[i] = CLAMP_TO_8BIT(
(ff_mpeg1_default_intra_matrix[i]*j->s->qscale) >> 3);
convert_matrix(j->s, j->s->q_intra_matrix, j->s->q_intra_matrix16,
j->s->intra_matrix, j->s->intra_quant_bias, 8, 8);
return j;
}
static int jpeg_enc_frame(jpeg_enc_t *j, unsigned char *y_data,
unsigned char *u_data, unsigned char *v_data, char *bufr) {
int i, k, mb_x, mb_y, overflow;
short int *dest;
unsigned char *source;
/* initialize the buffer */
init_put_bits(&j->s->pb, bufr, 1024*256);
mjpeg_picture_header(j->s);
j->s->header_bits = put_bits_count(&j->s->pb);
j->s->last_dc[0] = 128;
j->s->last_dc[1] = 128;
j->s->last_dc[2] = 128;
for (mb_y = 0; mb_y < j->s->mb_height; mb_y++) {
for (mb_x = 0; mb_x < j->s->mb_width; mb_x++) {
/* conversion 8 to 16 bit and filling of blocks
* must be mmx optimized */
/* fill 2 Y macroblocks and one U and one V */
source = mb_y * 8 * j->y_rs +
16 * j->y_ps * mb_x + y_data;
dest = j->s->block[0];
for (i = 0; i < 8; i++) {
for (k = 0; k < 8; k++) {
dest[k] = source[k*j->y_ps];
}
dest += 8;
source += j->y_rs;
}
source = mb_y * 8 * j->y_rs +
(16*mb_x + 8)*j->y_ps + y_data;
dest = j->s->block[1];
for (i = 0; i < 8; i++) {
for (k = 0; k < 8; k++) {
dest[k] = source[k*j->y_ps];
}
dest += 8;
source += j->y_rs;
}
if (!j->bw && j->cheap_upsample) {
source = mb_y*4*j->u_rs +
8*mb_x*j->u_ps + u_data;
dest = j->s->block[2];
for (i = 0; i < 4; i++) {
for (k = 0; k < 8; k++) {
dest[k] = source[k*j->u_ps];
dest[k+8] = source[k*j->u_ps];
}
dest += 16;
source += j->u_rs;
}
source = mb_y*4*j->v_rs +
8*mb_x*j->v_ps + v_data;
dest = j->s->block[3];
for (i = 0; i < 4; i++) {
for (k = 0; k < 8; k++) {
dest[k] = source[k*j->v_ps];
dest[k+8] = source[k*j->v_ps];
}
dest += 16;
source += j->u_rs;
}
} else if (!j->bw && !j->cheap_upsample) {
source = mb_y*8*j->u_rs +
8*mb_x*j->u_ps + u_data;
dest = j->s->block[2];
for (i = 0; i < 8; i++) {
for (k = 0; k < 8; k++)
dest[k] = source[k*j->u_ps];
dest += 8;
source += j->u_rs;
}
source = mb_y*8*j->v_rs +
8*mb_x*j->v_ps + v_data;
dest = j->s->block[3];
for (i = 0; i < 8; i++) {
for (k = 0; k < 8; k++)
dest[k] = source[k*j->v_ps];
dest += 8;
source += j->u_rs;
}
}
emms_c(); /* is this really needed? */
j->s->block_last_index[0] =
j->s->dct_quantize(j->s, j->s->block[0],
0, 8, &overflow);
if (overflow) clip_coeffs(j->s, j->s->block[0],
j->s->block_last_index[0]);
j->s->block_last_index[1] =
j->s->dct_quantize(j->s, j->s->block[1],
1, 8, &overflow);
if (overflow) clip_coeffs(j->s, j->s->block[1],
j->s->block_last_index[1]);
if (!j->bw) {
j->s->block_last_index[4] =
j->s->dct_quantize(j->s, j->s->block[2],
4, 8, &overflow);
if (overflow) clip_coeffs(j->s, j->s->block[2],
j->s->block_last_index[2]);
j->s->block_last_index[5] =
j->s->dct_quantize(j->s, j->s->block[3],
5, 8, &overflow);
if (overflow) clip_coeffs(j->s, j->s->block[3],
j->s->block_last_index[3]);
}
zr_mjpeg_encode_mb(j);
}
}
emms_c();
mjpeg_picture_trailer(j->s);
flush_put_bits(&j->s->pb);
if (j->s->mjpeg_write_tables == 1)
j->s->mjpeg_write_tables = 0;
return pbBufPtr(&(j->s->pb)) - j->s->pb.buf;
}
static void jpeg_enc_uninit(jpeg_enc_t *j) {
mjpeg_close(j->s);
free(j->s);
free(j);
}
struct vf_priv_s {
jpeg_enc_t *j;
unsigned char buf[256*1024];
int bw, fd, hdec, vdec;
int fields;
int y_stride;
int c_stride;
int quality;
int maxwidth;
int maxheight;
};
static int config(struct vf_instance_s* vf, int width, int height, int d_width,
int d_height, unsigned int flags, unsigned int outfmt){
struct vf_priv_s *priv = vf->priv;
float aspect_decision;
int stretchx, stretchy, err = 0, maxstretchx = 4;
priv->fields = 1;
VERBOSE("config() called\n");
if (priv->j) {
VERBOSE("re-configuring, resetting JPEG encoder\n");
jpeg_enc_uninit(priv->j);
priv->j = NULL;
}
aspect_decision = ((float)d_width/(float)d_height)/
((float)width/(float)height);
if (aspect_decision > 1.8 && aspect_decision < 2.2) {
VERBOSE("should correct aspect by stretching x times 2, %d %d\n", 2*width, priv->maxwidth);
if (2*width <= priv->maxwidth) {
d_width = 2*width;
d_height = height;
maxstretchx = 2;
} else {
WARNING("unable to correct aspect by stretching, because resulting X will be too large, aspect correction by decimating y not yet implemented\n");
d_width = width;
d_height = height;
}
/* prestretch movie */
} else {
/* uncorrecting output for now */
d_width = width;
d_height = height;
}
/* make the scaling decision
* we are capable of stretching the image in the horizontal
* direction by factors 1, 2 and 4
* we can stretch the image in the vertical direction by a
* factor of 1 and 2 AND we must decide about interlacing */
if (d_width > priv->maxwidth/2 || height > priv->maxheight/2
|| maxstretchx == 1) {
stretchx = 1;
stretchy = 1;
priv->fields = 2;
if (priv->vdec == 2) {
priv->fields = 1;
} else if (priv->vdec == 4) {
priv->fields = 1;
stretchy = 2;
}
if (priv->hdec > maxstretchx) {
if (priv->fd) {
WARNING("horizontal decimation too high, changing to %d (use fd to keep hdec=%d)\n", maxstretchx, priv->hdec);
priv->hdec = maxstretchx;
}
}
stretchx = priv->hdec;
} else if (d_width > priv->maxwidth/4 ||
height > priv->maxheight/4 ||
maxstretchx == 2) {
stretchx = 2;
stretchy = 1;
priv->fields = 1;
if (priv->vdec == 2) {
stretchy = 2;
} else if (priv->vdec == 4) {
if (!priv->fd) {
WARNING("vertical decimation too high, changing to 2 (use fd to keep vdec=4)\n");
priv->vdec = 2;
}
stretchy = 2;
}
if (priv->hdec == 2) {
stretchx = 4;
} else if (priv->hdec == 4) {
if (priv->fd) {
WARNING("horizontal decimation too high, changing to 2 (use fd to keep hdec=4)\n");
priv->hdec = 2;
}
stretchx = 4;
}
} else {
/* output image is maximally stretched */
stretchx = 4;
stretchy = 2;
priv->fields = 1;
if (priv->vdec != 1 && !priv->fd) {
WARNING("vertical decimation too high, changing to 1 (use fd to keep vdec=%d)\n", priv->vdec);
priv->vdec = 1;
}
if (priv->hdec != 1 && !priv->fd) {
WARNING("horizontal decimation too high, changing to 1 (use fd to keep hdec=%d)\n", priv->hdec);
priv->hdec = 1;
}
}
VERBOSE("generated JPEG's %dx%s%d%s, stretched to %dx%d\n",
width/priv->hdec, (priv->fields == 2) ? "(" : "",
height/(priv->vdec*priv->fields),
(priv->fields == 2) ? "x2)" : "",
(width/priv->hdec)*stretchx,
(height/(priv->vdec*priv->fields))*
stretchy*priv->fields);
if ((width/priv->hdec)*stretchx > priv->maxwidth ||
(height/(priv->vdec*priv->fields))*
stretchy*priv->fields > priv->maxheight) {
ERROR("output dimensions too large (%dx%d), max (%dx%d) insert crop to fix\n", (width/priv->hdec)*stretchx, (height/(priv->vdec*priv->fields))*stretchy*priv->fields, priv->maxwidth, priv->maxheight);
err = 1;
}
if (width%(16*priv->hdec) != 0) {
ERROR("width must be a multiple of 16*hdec (%d), use expand\n",
priv->hdec*16);
err = 1;
}
if (height%(8*priv->fields*priv->vdec) != 0) {
ERROR("height must be a multiple of 8*fields*vdec (%d),"
" use expand\n", priv->vdec*priv->fields*8);
err = 1;
}
if (err) return 0;
priv->y_stride = width;
priv->c_stride = width/2;
priv->j = jpeg_enc_init(width, height/priv->fields, 1,
priv->fields*priv->y_stride, 1,
priv->fields*priv->c_stride, 1,
priv->fields*priv->c_stride, 1,
priv->quality, priv->bw);
if (!priv->j) return 0;
return vf_next_config(vf, width, height, d_width, d_height, flags,
(priv->fields == 2) ? IMGFMT_ZRMJPEGIT : IMGFMT_ZRMJPEGNI);
}
static int put_image(struct vf_instance_s* vf, mp_image_t *mpi){
struct vf_priv_s *priv = vf->priv;
int size = 0;
int i;
mp_image_t* dmpi;
for (i = 0; i < priv->fields; i++)
size += jpeg_enc_frame(priv->j,
mpi->planes[0] + i*priv->y_stride,
mpi->planes[1] + i*priv->c_stride,
mpi->planes[2] + i*priv->c_stride,
priv->buf + size);
dmpi = vf_get_image(vf->next, IMGFMT_ZRMJPEGNI,
MP_IMGTYPE_EXPORT, 0, mpi->w, mpi->h);
dmpi->planes[0] = (uint8_t*)priv->buf;
dmpi->planes[1] = (uint8_t*)size;
return vf_next_put_image(vf,dmpi);
}
static int query_format(struct vf_instance_s* vf, unsigned int fmt){
VERBOSE("query_format() called\n");
switch (fmt) {
case IMGFMT_YV12:
case IMGFMT_YUY2:
/* strictly speaking the output format of
* this filter will be known after config(),
* but everything that supports IMGFMT_ZRMJPEGNI
* should also support all other IMGFMT_ZRMJPEG* */
return vf_next_query_format(vf, IMGFMT_ZRMJPEGNI);
}
return 0;
}
static void uninit(vf_instance_t *vf) {
struct vf_priv_s *priv = vf->priv;
VERBOSE("uninit() called\n");
if (priv->j) jpeg_enc_uninit(priv->j);
free(priv);
}
static int open(vf_instance_t *vf, char* args){
struct vf_priv_s *priv;
VERBOSE("open() called: args=\"%s\"\n", args);
vf->config = config;
vf->put_image = put_image;
vf->query_format = query_format;
vf->uninit = uninit;
priv = vf->priv = calloc(sizeof(*priv), 1);
if (!vf->priv) {
ERROR("out of memory error\n");
return 0;
}
/* maximum displayable size by zoran card, these defaults
* are for my own zoran card in PAL mode, these can be changed
* by filter options. But... in an ideal world these values would
* be queried from the vo device itself... */
priv->maxwidth = 768;
priv->maxheight = 576;
priv->quality = 2;
priv->hdec = 1;
priv->vdec = 1;
/* if libavcodec is already initialized, we must not initialize it
* again, but if it is not initialized then we mustinitialize it now. */
if (!avcodec_inited) {
/* we need to initialize libavcodec */
avcodec_init();
avcodec_register_all();
avcodec_inited=1;
}
if (args) {
char *arg, *tmp, *ptr, junk;
int last = 0, input;
/* save arguments, to be able to safely modify them */
arg = strdup(args);
if (!arg) {
ERROR("out of memory, this is bad\n");
return 0;
}
tmp = ptr = arg;
do {
while (*tmp != ':' && *tmp) tmp++;
if (*tmp == ':') *tmp++ = '\0';
else last = 1;
VERBOSE("processing filter option \"%s\"\n", ptr);
/* These options deal with the maximum output
* resolution of the zoran card. These should
* be queried from the vo device, but it is currently
* too difficult, so the user should tell the filter */
if (!strncmp("maxheight=", ptr, 10)) {
if (sscanf(ptr+10, "%d%c", &input, &junk) != 1)
ERROR(
"error parsing parameter to \"maxheight=\", \"%s\", ignoring\n"
, ptr + 10);
else {
priv->maxheight = input;
VERBOSE("setting maxheight to %d\n",
priv->maxheight);
}
} else if (!strncmp("quality=", ptr, 8)) {
if (sscanf(ptr+8, "%d%c", &input, &junk) != 1)
ERROR(
"error parsing parameter to \"quality=\", \"%s\", ignoring\n"
, ptr + 8);
else if (input < 1 || input > 20)
ERROR(
"parameter to \"quality=\" out of range (1..20), %d\n", input);
else {
priv->quality = input;
VERBOSE("setting JPEG quality to %d\n",
priv->quality);
}
} else if (!strncmp("maxwidth=", ptr, 9)) {
if (sscanf(ptr+9, "%d%c", &input, &junk) != 1)
ERROR(
"error parsing parameter to \"maxwidth=\", \"%s\", ignoring\n"
, ptr + 9);
else {
priv->maxwidth = input;
VERBOSE("setting maxwidth to %d\n",
priv->maxwidth);
}
} else if (!strncmp("hdec=", ptr, 5)) {
if (sscanf(ptr+5, "%d%c", &input, &junk) != 1)
ERROR(
"error parsing parameter to \"hdec=\", \"%s\", ignoring\n"
, ptr + 9);
else if (input != 1 && input != 2 && input != 4)
ERROR(
"illegal parameter to \"hdec=\", %d, should be 1, 2 or 4",
input);
else {
priv->hdec = input;
VERBOSE(
"setting horizontal decimation to %d\n", priv->maxwidth);
}
} else if (!strncmp("vdec=", ptr, 5)) {
if (sscanf(ptr+5, "%d%c", &input, &junk) != 1)
ERROR(
"error parsing parameter to \"vdec=\", \"%s\", ignoring\n"
, ptr + 9);
else if (input != 1 && input != 2 && input != 4)
ERROR(
"illegal parameter to \"vdec=\", %d, should be 1, 2 or 4",
input);
else {
priv->vdec = input;
VERBOSE(
"setting vertical decimation to %d\n", priv->maxwidth);
}
} else if (!strcasecmp("dc10+-PAL", ptr) ||
!strcasecmp("dc10-PAL", ptr)) {
priv->maxwidth = 768;
priv->maxheight = 576;
VERBOSE("setting DC10(+) PAL profile\n");
} else if (!strcasecmp("fd", ptr)) {
priv->fd = 1;
VERBOSE("forcing decimation\n");
} else if (!strcasecmp("nofd", ptr)) {
priv->fd = 0;
VERBOSE("decimate only if beautiful\n");
} else if (!strcasecmp("bw", ptr)) {
priv->bw = 1;
VERBOSE("setting black and white encoding\n");
} else if (!strcasecmp("color", ptr)) {
priv->bw = 0;
VERBOSE("setting color encoding\n");
} else if (!strcasecmp("dc10+-NTSC", ptr) ||
!strcasecmp("dc10-NTSC", ptr)) {
priv->maxwidth = 640;
priv->maxheight = 480;
VERBOSE("setting DC10(+) NTSC profile\n");
} else if (!strcasecmp("buz-PAL", ptr) ||
!strcasecmp("lml33-PAL", ptr)) {
priv->maxwidth = 720;
priv->maxheight = 576;
VERBOSE("setting buz/lml33 PAL profile\n");
} else if (!strcasecmp("buz-NTSC", ptr) ||
!strcasecmp("lml33-NTSC", ptr)) {
priv->maxwidth = 720;
priv->maxheight = 480;
VERBOSE("setting buz/lml33 NTSC profile\n");
} else {
WARNING("ignoring unknown filter option "
"\"%s\", or missing argument\n",
ptr);
}
ptr = tmp;
} while (!last);
free(arg);
}
return 1;
}
vf_info_t vf_info_zrmjpeg = {
"realtime zoran MJPEG encoding",
"zrmjpeg",
"Rik Snel",
"",
open,
NULL
};
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