/**
* RLE compress the image, with maximum size of out_size
* @param outbuf Output buffer
* @param out_size Maximum output size
* @param pic Image to compress
* @param bpp Bytes per pixel
* @param w Image width
* @param h Image height
* @return Size of output in bytes, or -1 if larger than out_size
*/
static int targa_encode_rle(uint8_t *outbuf, int out_size, AVFrame *pic,
int bpp, int w, int h)
{
int y,ret;
uint8_t *out;
out = outbuf;
for(y = 0; y < h; y ++) {
ret = ff_rle_encode(out, out_size, pic->data[0] + pic->linesize[0] * y, bpp, w, 0x7f, 0, -1, 0);
if(ret == -1){
return -1;
}
out+= ret;
out_size -= ret;
}
return out - outbuf;
}
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *frame, int *got_packet)
{
SgiContext *s = avctx->priv_data;
AVFrame * const p = &s->picture;
uint8_t *offsettab, *lengthtab, *in_buf, *encode_buf, *buf;
int x, y, z, length, tablesize, ret;
unsigned int width, height, depth, dimension;
unsigned char *end_buf;
*p = *frame;
p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;
width = avctx->width;
height = avctx->height;
switch (avctx->pix_fmt) {
case PIX_FMT_GRAY8:
dimension = SGI_SINGLE_CHAN;
depth = SGI_GRAYSCALE;
break;
case PIX_FMT_RGB24:
dimension = SGI_MULTI_CHAN;
depth = SGI_RGB;
break;
case PIX_FMT_RGBA:
dimension = SGI_MULTI_CHAN;
depth = SGI_RGBA;
break;
default:
return AVERROR_INVALIDDATA;
}
tablesize = depth * height * 4;
length = SGI_HEADER_SIZE;
if (avctx->coder_type == FF_CODER_TYPE_RAW)
length += depth * height * width;
else // assume ff_rl_encode() produces at most 2x size of input
length += tablesize * 2 + depth * height * (2 * width + 1);
if ((ret = ff_alloc_packet(pkt, length)) < 0) {
av_log(avctx, AV_LOG_ERROR, "Error getting output packet of size %d.\n", length);
return ret;
}
buf = pkt->data;
end_buf = pkt->data + pkt->size;
/* Encode header. */
bytestream_put_be16(&buf, SGI_MAGIC);
bytestream_put_byte(&buf, avctx->coder_type != FF_CODER_TYPE_RAW); /* RLE 1 - VERBATIM 0*/
bytestream_put_byte(&buf, 1); /* bytes_per_channel */
bytestream_put_be16(&buf, dimension);
bytestream_put_be16(&buf, width);
bytestream_put_be16(&buf, height);
bytestream_put_be16(&buf, depth);
/* The rest are constant in this implementation. */
bytestream_put_be32(&buf, 0L); /* pixmin */
bytestream_put_be32(&buf, 255L); /* pixmax */
bytestream_put_be32(&buf, 0L); /* dummy */
/* name */
memset(buf, 0, SGI_HEADER_SIZE);
buf += 80;
/* colormap */
bytestream_put_be32(&buf, 0L);
/* The rest of the 512 byte header is unused. */
buf += 404;
offsettab = buf;
if (avctx->coder_type != FF_CODER_TYPE_RAW) {
/* Skip RLE offset table. */
buf += tablesize;
lengthtab = buf;
/* Skip RLE length table. */
buf += tablesize;
/* Make an intermediate consecutive buffer. */
if (!(encode_buf = av_malloc(width)))
return -1;
for (z = 0; z < depth; z++) {
in_buf = p->data[0] + p->linesize[0] * (height - 1) + z;
for (y = 0; y < height; y++) {
bytestream_put_be32(&offsettab, buf - pkt->data);
for (x = 0; x < width; x++)
encode_buf[x] = in_buf[depth * x];
if ((length = ff_rle_encode(buf, end_buf - buf - 1, encode_buf, 1, width, 0, 0, 0x80, 0)) < 1) {
av_free(encode_buf);
return -1;
}
buf += length;
bytestream_put_byte(&buf, 0);
bytestream_put_be32(&lengthtab, length + 1);
in_buf -= p->linesize[0];
}
}
av_free(encode_buf);
} else {
for (z = 0; z < depth; z++) {
in_buf = p->data[0] + p->linesize[0] * (height - 1) + z;
for (y = 0; y < height; y++) {
for (x = 0; x < width * depth; x += depth)
bytestream_put_byte(&buf, in_buf[x]);
in_buf -= p->linesize[0];
}
}
}
/* total length */
pkt->size = buf - pkt->data;
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0;
}
static int encode_frame(AVCodecContext *avctx, unsigned char *buf,
int buf_size, void *data)
{
SgiContext *s = avctx->priv_data;
AVFrame * const p = &s->picture;
uint8_t *offsettab, *lengthtab, *in_buf, *encode_buf;
int x, y, z, length, tablesize;
unsigned int width, height, depth, dimension;
unsigned char *orig_buf = buf, *end_buf = buf + buf_size;
*p = *(AVFrame*)data;
p->pict_type = FF_I_TYPE;
p->key_frame = 1;
width = avctx->width;
height = avctx->height;
switch (avctx->pix_fmt) {
case PIX_FMT_GRAY8:
dimension = SGI_SINGLE_CHAN;
depth = SGI_GRAYSCALE;
break;
case PIX_FMT_RGB24:
dimension = SGI_MULTI_CHAN;
depth = SGI_RGB;
break;
case PIX_FMT_RGBA:
dimension = SGI_MULTI_CHAN;
depth = SGI_RGBA;
break;
default:
return AVERROR_INVALIDDATA;
}
tablesize = depth * height * 4;
length = tablesize * 2 + SGI_HEADER_SIZE;
if (buf_size < length) {
av_log(avctx, AV_LOG_ERROR, "buf_size too small(need %d, got %d)\n", length, buf_size);
return -1;
}
/* Encode header. */
bytestream_put_be16(&buf, SGI_MAGIC);
bytestream_put_byte(&buf, avctx->coder_type != FF_CODER_TYPE_RAW); /* RLE 1 - VERBATIM 0*/
bytestream_put_byte(&buf, 1); /* bytes_per_channel */
bytestream_put_be16(&buf, dimension);
bytestream_put_be16(&buf, width);
bytestream_put_be16(&buf, height);
bytestream_put_be16(&buf, depth);
/* The rest are constant in this implementation. */
bytestream_put_be32(&buf, 0L); /* pixmin */
bytestream_put_be32(&buf, 255L); /* pixmax */
bytestream_put_be32(&buf, 0L); /* dummy */
/* name */
memset(buf, 0, SGI_HEADER_SIZE);
buf += 80;
/* colormap */
bytestream_put_be32(&buf, 0L);
/* The rest of the 512 byte header is unused. */
buf += 404;
offsettab = buf;
if (avctx->coder_type != FF_CODER_TYPE_RAW) {
/* Skip RLE offset table. */
buf += tablesize;
lengthtab = buf;
/* Skip RLE length table. */
buf += tablesize;
/* Make an intermediate consecutive buffer. */
if (!(encode_buf = av_malloc(width)))
return -1;
for (z = 0; z < depth; z++) {
in_buf = p->data[0] + p->linesize[0] * (height - 1) + z;
for (y = 0; y < height; y++) {
bytestream_put_be32(&offsettab, buf - orig_buf);
for (x = 0; x < width; x++)
encode_buf[x] = in_buf[depth * x];
if ((length = ff_rle_encode(buf, end_buf - buf - 1, encode_buf, 1, width, 0, 0, 0x80, 0)) < 1) {
av_free(encode_buf);
return -1;
}
buf += length;
bytestream_put_byte(&buf, 0);
bytestream_put_be32(&lengthtab, length + 1);
in_buf -= p->linesize[0];
}
}
av_free(encode_buf);
} else {
for (z = 0; z < depth; z++) {
in_buf = p->data[0] + p->linesize[0] * (height - 1) + z;
for (y = 0; y < height; y++) {
for (x = 0; x < width * depth; x += depth)
bytestream_put_byte(&buf, in_buf[x]);
in_buf -= p->linesize[0];
}
}
}
/* total length */
return buf - orig_buf;
}
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *frame, int *got_packet)
{
const AVFrame * const p = frame;
uint8_t *offsettab, *lengthtab, *in_buf, *encode_buf, *buf;
int x, y, z, length, tablesize, ret;
unsigned int width, height, depth, dimension, bytes_per_channel, pixmax, put_be;
unsigned char *end_buf;
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
avctx->coded_frame->key_frame = 1;
width = avctx->width;
height = avctx->height;
bytes_per_channel = 1;
pixmax = 0xFF;
put_be = HAVE_BIGENDIAN;
switch (avctx->pix_fmt) {
case AV_PIX_FMT_GRAY8:
dimension = SGI_SINGLE_CHAN;
depth = SGI_GRAYSCALE;
break;
case AV_PIX_FMT_RGB24:
dimension = SGI_MULTI_CHAN;
depth = SGI_RGB;
break;
case AV_PIX_FMT_RGBA:
dimension = SGI_MULTI_CHAN;
depth = SGI_RGBA;
break;
case AV_PIX_FMT_GRAY16LE:
put_be = !HAVE_BIGENDIAN;
case AV_PIX_FMT_GRAY16BE:
avctx->coder_type = FF_CODER_TYPE_RAW;
bytes_per_channel = 2;
pixmax = 0xFFFF;
dimension = SGI_SINGLE_CHAN;
depth = SGI_GRAYSCALE;
break;
case AV_PIX_FMT_RGB48LE:
put_be = !HAVE_BIGENDIAN;
case AV_PIX_FMT_RGB48BE:
avctx->coder_type = FF_CODER_TYPE_RAW;
bytes_per_channel = 2;
pixmax = 0xFFFF;
dimension = SGI_MULTI_CHAN;
depth = SGI_RGB;
break;
case AV_PIX_FMT_RGBA64LE:
put_be = !HAVE_BIGENDIAN;
case AV_PIX_FMT_RGBA64BE:
avctx->coder_type = FF_CODER_TYPE_RAW;
bytes_per_channel = 2;
pixmax = 0xFFFF;
dimension = SGI_MULTI_CHAN;
depth = SGI_RGBA;
break;
default:
return AVERROR_INVALIDDATA;
}
tablesize = depth * height * 4;
length = SGI_HEADER_SIZE;
if (avctx->coder_type == FF_CODER_TYPE_RAW)
length += depth * height * width;
else // assume ff_rl_encode() produces at most 2x size of input
length += tablesize * 2 + depth * height * (2 * width + 1);
if ((ret = ff_alloc_packet2(avctx, pkt, bytes_per_channel * length)) < 0)
return ret;
buf = pkt->data;
end_buf = pkt->data + pkt->size;
/* Encode header. */
bytestream_put_be16(&buf, SGI_MAGIC);
bytestream_put_byte(&buf, avctx->coder_type != FF_CODER_TYPE_RAW); /* RLE 1 - VERBATIM 0*/
bytestream_put_byte(&buf, bytes_per_channel);
bytestream_put_be16(&buf, dimension);
bytestream_put_be16(&buf, width);
bytestream_put_be16(&buf, height);
bytestream_put_be16(&buf, depth);
bytestream_put_be32(&buf, 0L); /* pixmin */
bytestream_put_be32(&buf, pixmax);
bytestream_put_be32(&buf, 0L); /* dummy */
/* name */
memset(buf, 0, SGI_HEADER_SIZE);
buf += 80;
/* colormap */
bytestream_put_be32(&buf, 0L);
/* The rest of the 512 byte header is unused. */
buf += 404;
offsettab = buf;
if (avctx->coder_type != FF_CODER_TYPE_RAW) {
/* Skip RLE offset table. */
buf += tablesize;
lengthtab = buf;
/* Skip RLE length table. */
buf += tablesize;
/* Make an intermediate consecutive buffer. */
if (!(encode_buf = av_malloc(width)))
return -1;
for (z = 0; z < depth; z++) {
in_buf = p->data[0] + p->linesize[0] * (height - 1) + z;
for (y = 0; y < height; y++) {
bytestream_put_be32(&offsettab, buf - pkt->data);
for (x = 0; x < width; x++)
encode_buf[x] = in_buf[depth * x];
if ((length = ff_rle_encode(buf, end_buf - buf - 1, encode_buf, 1, width, 0, 0, 0x80, 0)) < 1) {
av_free(encode_buf);
return -1;
}
buf += length;
bytestream_put_byte(&buf, 0);
bytestream_put_be32(&lengthtab, length + 1);
in_buf -= p->linesize[0];
}
}
av_free(encode_buf);
} else {
for (z = 0; z < depth; z++) {
in_buf = p->data[0] + p->linesize[0] * (height - 1) + z * bytes_per_channel;
for (y = 0; y < height; y++) {
for (x = 0; x < width * depth; x += depth)
if (bytes_per_channel == 1) {
bytestream_put_byte(&buf, in_buf[x]);
} else {
if (put_be) {
bytestream_put_be16(&buf, ((uint16_t *)in_buf)[x]);
} else {
bytestream_put_le16(&buf, ((uint16_t *)in_buf)[x]);
}
}
in_buf -= p->linesize[0];
}
}
}
/* total length */
pkt->size = buf - pkt->data;
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0;
}
