#include "avcodec.h"
#include "bytestream.h"
+#include "internal.h"
#include "ulti_cb.h"
typedef struct UltimotionDecodeContext {
AVCodecContext *avctx;
int width, height, blocks;
- AVFrame frame;
+ AVFrame *frame;
const uint8_t *ulti_codebook;
+ GetByteContext gb;
} UltimotionDecodeContext;
static av_cold int ulti_decode_init(AVCodecContext *avctx)
s->width = avctx->width;
s->height = avctx->height;
s->blocks = (s->width / 8) * (s->height / 8);
- avctx->pix_fmt = PIX_FMT_YUV410P;
- avctx->coded_frame = (AVFrame*) &s->frame;
+ avctx->pix_fmt = AV_PIX_FMT_YUV410P;
s->ulti_codebook = ulti_codebook;
+ s->frame = av_frame_alloc();
+ if (!s->frame)
+ return AVERROR(ENOMEM);
+
return 0;
}
static av_cold int ulti_decode_end(AVCodecContext *avctx){
UltimotionDecodeContext *s = avctx->priv_data;
- AVFrame *pic = &s->frame;
- if (pic->data[0])
- avctx->release_buffer(avctx, pic);
+ av_frame_free(&s->frame);
return 0;
}
}
static int ulti_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
+ void *data, int *got_frame,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int blocks = 0;
int done = 0;
int x = 0, y = 0;
- int i;
+ int i, ret;
int skip;
int tmp;
- if(s->frame.data[0])
- avctx->release_buffer(avctx, &s->frame);
-
- s->frame.reference = 1;
- s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
- if(avctx->get_buffer(avctx, &s->frame) < 0) {
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
+ if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
+ return ret;
}
+ bytestream2_init(&s->gb, buf, buf_size);
+
while(!done) {
int idx;
if(blocks >= s->blocks || y >= s->height)
break;//all blocks decoded
- idx = *buf++;
+ if (bytestream2_get_bytes_left(&s->gb) < 1)
+ goto err;
+ idx = bytestream2_get_byteu(&s->gb);
if((idx & 0xF8) == 0x70) {
switch(idx) {
case 0x70: //change modifier
- modifier = *buf++;
+ modifier = bytestream2_get_byte(&s->gb);
if(modifier>1)
av_log(avctx, AV_LOG_INFO, "warning: modifier must be 0 or 1, got %i\n", modifier);
break;
done = 1;
break;
case 0x74: //skip some blocks
- skip = *buf++;
+ skip = bytestream2_get_byte(&s->gb);
if ((blocks + skip) >= s->blocks)
break;
blocks += skip;
chroma = 0;
} else {
cf = 0;
- if (idx)
- chroma = *buf++;
+ if (idx) {
+ chroma = bytestream2_get_byte(&s->gb);
+ }
}
for (i = 0; i < 4; i++) { // for every subblock
code = (idx >> (6 - i*2)) & 3; //extract 2 bits
if(!code) //skip subblock
continue;
- if(cf)
- chroma = *buf++;
+ if(cf) {
+ chroma = bytestream2_get_byte(&s->gb);
+ }
tx = x + block_coords[i * 2];
ty = y + block_coords[(i * 2) + 1];
switch(code) {
case 1:
- tmp = *buf++;
+ tmp = bytestream2_get_byte(&s->gb);
angle = angle_by_index[(tmp >> 6) & 0x3];
case 2:
if (modifier) { // unpack four luma samples
- tmp = bytestream_get_be24(&buf);
+ tmp = bytestream2_get_be24(&s->gb);
Y[0] = (tmp >> 18) & 0x3F;
Y[1] = (tmp >> 12) & 0x3F;
Y[3] = tmp & 0x3F;
angle = 16;
} else { // retrieve luma samples from codebook
- tmp = bytestream_get_be16(&buf);
+ tmp = bytestream2_get_be16(&s->gb);
angle = (tmp >> 12) & 0xF;
tmp &= 0xFFF;
if (modifier) { // all 16 luma samples
uint8_t Luma[16];
- tmp = bytestream_get_be24(&buf);
+ if (bytestream2_get_bytes_left(&s->gb) < 12)
+ goto err;
+ tmp = bytestream2_get_be24u(&s->gb);
Luma[0] = (tmp >> 18) & 0x3F;
Luma[1] = (tmp >> 12) & 0x3F;
Luma[2] = (tmp >> 6) & 0x3F;
Luma[3] = tmp & 0x3F;
- tmp = bytestream_get_be24(&buf);
+ tmp = bytestream2_get_be24u(&s->gb);
Luma[4] = (tmp >> 18) & 0x3F;
Luma[5] = (tmp >> 12) & 0x3F;
Luma[6] = (tmp >> 6) & 0x3F;
Luma[7] = tmp & 0x3F;
- tmp = bytestream_get_be24(&buf);
+ tmp = bytestream2_get_be24u(&s->gb);
Luma[8] = (tmp >> 18) & 0x3F;
Luma[9] = (tmp >> 12) & 0x3F;
Luma[10] = (tmp >> 6) & 0x3F;
Luma[11] = tmp & 0x3F;
- tmp = bytestream_get_be24(&buf);
+ tmp = bytestream2_get_be24u(&s->gb);
Luma[12] = (tmp >> 18) & 0x3F;
Luma[13] = (tmp >> 12) & 0x3F;
Luma[14] = (tmp >> 6) & 0x3F;
Luma[15] = tmp & 0x3F;
- ulti_convert_yuv(&s->frame, tx, ty, Luma, chroma);
+ ulti_convert_yuv(s->frame, tx, ty, Luma, chroma);
} else {
- tmp = *buf++;
+ if (bytestream2_get_bytes_left(&s->gb) < 4)
+ goto err;
+ tmp = bytestream2_get_byteu(&s->gb);
if(tmp & 0x80) {
angle = (tmp >> 4) & 0x7;
- tmp = (tmp << 8) + *buf++;
+ tmp = (tmp << 8) + bytestream2_get_byteu(&s->gb);
Y[0] = (tmp >> 6) & 0x3F;
Y[1] = tmp & 0x3F;
- Y[2] = (*buf++) & 0x3F;
- Y[3] = (*buf++) & 0x3F;
- ulti_grad(&s->frame, tx, ty, Y, chroma, angle); //draw block
+ Y[2] = bytestream2_get_byteu(&s->gb) & 0x3F;
+ Y[3] = bytestream2_get_byteu(&s->gb) & 0x3F;
+ ulti_grad(s->frame, tx, ty, Y, chroma, angle); //draw block
} else { // some patterns
- int f0, f1;
- f0 = *buf++;
- f1 = tmp;
- Y[0] = (*buf++) & 0x3F;
- Y[1] = (*buf++) & 0x3F;
- ulti_pattern(&s->frame, tx, ty, f1, f0, Y[0], Y[1], chroma);
+ int f0 = tmp;
+ int f1 = bytestream2_get_byteu(&s->gb);
+ Y[0] = bytestream2_get_byteu(&s->gb) & 0x3F;
+ Y[1] = bytestream2_get_byteu(&s->gb) & 0x3F;
+ ulti_pattern(s->frame, tx, ty, f0, f1, Y[0], Y[1], chroma);
}
}
break;
}
if(code != 3)
- ulti_grad(&s->frame, tx, ty, Y, chroma, angle); // draw block
+ ulti_grad(s->frame, tx, ty, Y, chroma, angle); // draw block
}
blocks++;
x += 8;
}
}
- *data_size=sizeof(AVFrame);
- *(AVFrame*)data= s->frame;
+ *got_frame = 1;
+ if ((ret = av_frame_ref(data, s->frame)) < 0)
+ return ret;
return buf_size;
+
+err:
+ av_log(avctx, AV_LOG_ERROR,
+ "Insufficient data\n");
+ return AVERROR_INVALIDDATA;
}
AVCodec ff_ulti_decoder = {
- "ultimotion",
- AVMEDIA_TYPE_VIDEO,
- CODEC_ID_ULTI,
- sizeof(UltimotionDecodeContext),
- ulti_decode_init,
- NULL,
- ulti_decode_end,
- ulti_decode_frame,
- CODEC_CAP_DR1,
- NULL,
- .long_name = NULL_IF_CONFIG_SMALL("IBM UltiMotion"),
+ .name = "ultimotion",
+ .long_name = NULL_IF_CONFIG_SMALL("IBM UltiMotion"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_ULTI,
+ .priv_data_size = sizeof(UltimotionDecodeContext),
+ .init = ulti_decode_init,
+ .close = ulti_decode_end,
+ .decode = ulti_decode_frame,
+ .capabilities = AV_CODEC_CAP_DR1,
};
-
projects / ffmpeg / blobdiff