virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-11-26 19:01:44 +02:00
Code Issues Releases Activity

dpx: 10 and 12 bit decoding

Browse Source 
Rewrite 10 bit dpx decoder to decode into GBRP10 color space
instead of converting to RGB48.
Add 12 bit decoder to decode into GBRP12 color space.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Georg Lippitsch 2012-08-26 14:51:13 +02:00 committed by Michael Niedermayer
parent 99f5090714
commit 5cc5d9d5f7
2 changed files with 58 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

87
libavcodec/dpx.c
View File

@ -41,14 +41,6 @@ static unsigned int read32(const uint8_t **ptr, int is_big)
return temp;
}
static inline unsigned make_16bit(unsigned value)
{
// mask away invalid bits
value &= 0xFFC0;
// correctly expand to 16 bits
return value + (value >> 10);
}
static int decode_frame(AVCodecContext *avctx,
void *data,
int *data_size,
@ -60,12 +52,13 @@ static int decode_frame(AVCodecContext *avctx,
DPXContext *const s = avctx->priv_data;
AVFrame *picture = data;
AVFrame *const p = &s->picture;
uint8_t *ptr;
uint8_t *ptr[AV_NUM_DATA_POINTERS];
unsigned int offset;
int magic_num, endian;
int x, y;
int x, y, i;
int w, h, stride, bits_per_color, descriptor, elements, target_packet_size, source_packet_size;
int planar;
unsigned int rgbBuffer;
@ -138,13 +131,24 @@ static int decode_frame(AVCodecContext *avctx,
}
source_packet_size = elements;
target_packet_size = elements;
planar = 0;
break;
case 10:
avctx->pix_fmt = PIX_FMT_RGB48;
avctx->pix_fmt = PIX_FMT_GBRP10;
target_packet_size = 6;
source_packet_size = 4;
planar = 1;
break;
case 12:
if (endian) {
avctx->pix_fmt = elements == 4 ? PIX_FMT_GBRP12BE : PIX_FMT_GBRP12BE;
} else {
avctx->pix_fmt = elements == 4 ? PIX_FMT_GBRP12LE : PIX_FMT_GBRP12LE;
}
target_packet_size = 6;
source_packet_size = 6;
planar = 1;
break;
case 16:
if (endian) {
avctx->pix_fmt = elements == 4 ? PIX_FMT_RGBA64BE : PIX_FMT_RGB48BE;
@ -153,6 +157,7 @@ static int decode_frame(AVCodecContext *avctx,
}
target_packet_size =
source_packet_size = elements * 2;
planar = 0;
break;
default:
av_log(avctx, AV_LOG_ERROR, "Unsupported color depth : %d\n", bits_per_color);
@ -173,7 +178,8 @@ static int decode_frame(AVCodecContext *avctx,
// Move pointer to offset from start of file
buf = avpkt->data + offset;
ptr = p->data[0];
for (i=0; i<AV_NUM_DATA_POINTERS; i++)
ptr[i] = p->data[i];
stride = p->linesize[0];
if (source_packet_size*avctx->width*avctx->height > buf_end - buf) {
@ -183,35 +189,56 @@ static int decode_frame(AVCodecContext *avctx,
switch (bits_per_color) {
case 10:
for (x = 0; x < avctx->height; x++) {
uint16_t *dst = (uint16_t*)ptr;
uint16_t *dst[3] = {(uint16_t*)ptr[0],
(uint16_t*)ptr[1],
(uint16_t*)ptr[2]};
for (y = 0; y < avctx->width; y++) {
rgbBuffer = read32(&buf, endian);
// Read out the 10-bit colors and convert to 16-bit
*dst++ = make_16bit(rgbBuffer >> 16);
*dst++ = make_16bit(rgbBuffer >> 6);
*dst++ = make_16bit(rgbBuffer << 4);
*dst[0]++ = (rgbBuffer >> 12) & 0x3FF;
*dst[1]++ = (rgbBuffer >> 2) & 0x3FF;
*dst[2]++ = (rgbBuffer >> 22) & 0x3FF;
}
ptr += stride;
for (i=0; i<3; i++)
ptr[i] += p->linesize[i];
}
break;
case 8:
case 12: // Treat 12-bit as 16-bit
case 12:
case 16:
if (source_packet_size == target_packet_size) {
if (planar) {
int source_bpc = target_packet_size / elements;
int target_bpc = target_packet_size / elements;
for (x = 0; x < avctx->height; x++) {
memcpy(ptr, buf, target_packet_size*avctx->width);
ptr += stride;
buf += source_packet_size*avctx->width;
uint8_t *dst[AV_NUM_DATA_POINTERS];
for (i=0; i<elements; i++)
dst[i] = ptr[i];
for (y = 0; y < avctx->width; y++) {
for (i=0; i<3; i++) {
memcpy(dst[i], buf, FFMIN(source_bpc, target_bpc));
dst[i] += target_bpc;
buf += source_bpc;
}
}
for (i=0; i<elements; i++)
ptr[i] += p->linesize[i];
}
} else {
for (x = 0; x < avctx->height; x++) {
uint8_t *dst = ptr;
for (y = 0; y < avctx->width; y++) {
memcpy(dst, buf, target_packet_size);
dst += target_packet_size;
buf += source_packet_size;
if (source_packet_size == target_packet_size) {
for (x = 0; x < avctx->height; x++) {
memcpy(ptr[0], buf, target_packet_size*avctx->width);
ptr[0] += stride;
buf += source_packet_size*avctx->width;
}
} else {
for (x = 0; x < avctx->height; x++) {
uint8_t *dst = ptr[0];
for (y = 0; y < avctx->width; y++) {
memcpy(dst, buf, target_packet_size);
dst += target_packet_size;
buf += source_packet_size;
}
ptr[0] += stride;
}
ptr += stride;
}
}
break;

2
tests/ref/lavf/dpx
View File

@ -5,5 +5,5 @@
./tests/data/images/dpx/%02d.dpx CRC=0xe5b9c023
609920 ./tests/data/images/dpx/02.dpx
13dc41b1e1e36399a5e1f8b7e3344a81 *./tests/data/images/dpx/02.dpx
./tests/data/images/dpx/%02d.dpx CRC=0xf38d5830
./tests/data/images/dpx/%02d.dpx CRC=0xf0a1c097
407168 ./tests/data/images/dpx/02.dpx